From e7dda604b44d58022ea1ac8ae271e09562099f3f Mon Sep 17 00:00:00 2001 From: Brett Gordon Date: Tue, 15 Nov 2016 15:27:50 -0500 Subject: [PATCH] fuzix: netd enclosed is a patch for netd. Have fun figuring out netd.c :) This gives me (active open only) native networking. Me and Ron Klein have been testing this with success. Please advise, brett --- Applications/netd/Makefile.6809 | 45 + Applications/netd/clock-arch.c | 61 + Applications/netd/clock-arch.h | 40 + Applications/netd/clock.h | 88 ++ Applications/netd/coconic.c | 160 +++ Applications/netd/device.h | 27 + Applications/netd/dig.c | 238 +++ Applications/netd/echoping.c | 45 + Applications/netd/fuzix-conf.h | 23 + Applications/netd/fuzix-netd.pkg | 20 + Applications/netd/gethostbyname.c | 252 ++++ Applications/netd/httpd.c | 57 + Applications/netd/lwwire.c | 160 +++ Applications/netd/netd.c | 760 ++++++++++ Applications/netd/netd.h | 34 + Applications/netd/netdb.h | 55 + Applications/netd/netrc | 6 + Applications/netd/resolv.conf | 1 + Applications/netd/telnet.c | 511 +++++++ Applications/netd/timer.c | 127 ++ Applications/netd/timer.h | 86 ++ Applications/netd/uip.c | 1973 +++++++++++++++++++++++++ Applications/netd/uip.h | 2237 +++++++++++++++++++++++++++++ Applications/netd/uip_arch.h | 137 ++ Applications/netd/uip_arp.c | 440 ++++++ Applications/netd/uip_arp.h | 142 ++ Applications/netd/uiplib.c | 143 ++ Applications/netd/uiplib.h | 80 ++ Applications/netd/uipopt.h | 684 +++++++++ Kernel/platform-coco3/Makefile | 1 + Kernel/platform-coco3/build | 4 + Kernel/platform-coco3/devices.c | 1 + Kernel/platform-coco3/main.c | 1 - Library/include/sys/net_native.h | 75 + 34 files changed, 8713 insertions(+), 1 deletion(-) create mode 100644 Applications/netd/Makefile.6809 create mode 100644 Applications/netd/clock-arch.c create mode 100644 Applications/netd/clock-arch.h create mode 100644 Applications/netd/clock.h create mode 100644 Applications/netd/coconic.c create mode 100644 Applications/netd/device.h create mode 100644 Applications/netd/dig.c create mode 100644 Applications/netd/echoping.c create mode 100644 Applications/netd/fuzix-conf.h create mode 100644 Applications/netd/fuzix-netd.pkg create mode 100644 Applications/netd/gethostbyname.c create mode 100644 Applications/netd/httpd.c create mode 100644 Applications/netd/lwwire.c create mode 100644 Applications/netd/netd.c create mode 100644 Applications/netd/netd.h create mode 100644 Applications/netd/netdb.h create mode 100644 Applications/netd/netrc create mode 100644 Applications/netd/resolv.conf create mode 100644 Applications/netd/telnet.c create mode 100644 Applications/netd/timer.c create mode 100644 Applications/netd/timer.h create mode 100644 Applications/netd/uip.c create mode 100644 Applications/netd/uip.h create mode 100644 Applications/netd/uip_arch.h create mode 100644 Applications/netd/uip_arp.c create mode 100644 Applications/netd/uip_arp.h create mode 100644 Applications/netd/uiplib.c create mode 100644 Applications/netd/uiplib.h create mode 100644 Applications/netd/uipopt.h create mode 100644 Library/include/sys/net_native.h diff --git a/Applications/netd/Makefile.6809 b/Applications/netd/Makefile.6809 new file mode 100644 index 00000000..0ab79718 --- /dev/null +++ b/Applications/netd/Makefile.6809 @@ -0,0 +1,45 @@ +PLATFORM = 6809 +CC = m6809-unknown-gcc +# These are wrappers for lwasm and lwar +ASM = m6809-unknown-as +AR = m6809-unknown-ar +LINKER = lwlink +CFLAGS = -I../../Library/include -I../../Library/include/6809 +CFLAGS += -O0 -msoft-reg-count=0 -mfar-stack-param -fomit-frame-pointer +LINKER_OPT = --format=raw -L../../Library/libs -lc6809 +LIBGCCDIR = $(dir $(shell $(CC) -print-libgcc-file-name)) +LINKER_OPT += -L$(LIBGCCDIR) -lgcc +LINKER_OPT += --script=../util/$(TARGET).link +ASM_OPT = -o +CRT0 = ../../Library/libs/crt0_6809.o + +.SUFFIXES: .c .o + +SRCS = netd.c uip.c uiplib.c timer.c clock-arch.c uip_arp.c telnet.c lwwire.c +SRCS += echoping.c dig.c gethostbyname.c httpd.c coconic.c + +OBJS = $(SRCS:.c=.o) + +APPS = netd + +all: $(APPS) + + +netd: $(OBJS) + $(LINKER) $(LINKER_OPT) -o netd-lwwire $(CRT0) netd.o uip.o uiplib.o timer.o clock-arch.o uip_arp.o lwwire.o + $(LINKER) $(LINKER_OPT) -o netd-coconic $(CRT0) netd.o uip.o uiplib.o timer.o clock-arch.o uip_arp.o coconic.o + $(LINKER) $(LINKER_OPT) -o telnet $(CRT0) telnet.o gethostbyname.o + $(LINKER) $(LINKER_OPT) -o echoping $(CRT0) echoping.o + $(LINKER) $(LINKER_OPT) -o dig $(CRT0) dig.o + $(LINKER) $(LINKER_OPT) -o httpd $(CRT0) httpd.o + + + +size.report: $(APPS) + ls -l $^ > $@ + +clean: + rm -f $(OBJS) $(APPS) $(SRCS:.c=) core *~ *.asm *.lst *.sym *.map *.noi *.lk *.ihx *.tmp *.bin size.report *~ + +rmbak: + rm -f *~ core diff --git a/Applications/netd/clock-arch.c b/Applications/netd/clock-arch.c new file mode 100644 index 00000000..596017e3 --- /dev/null +++ b/Applications/netd/clock-arch.c @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2006, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack + * + * $Id: clock-arch.c,v 1.2 2006/06/12 08:00:31 adam Exp $ + */ + +/** + * \file + * Implementation of architecture-specific clock functionality + * \author + * Adam Dunkels + */ +#include +#include +#include "clock-arch.h" +#include + +/*---------------------------------------------------------------------------*/ +clock_time_t +clock_time(void) +{ + struct timeval tv; + struct timezone tz; + + // gettimeofday(&tv, &tz); + struct{ + uint16_t high; + uint16_t low; + }now; + _time((__ktime_t *)&now,1); + return now.low; + // return tv.tv_sec * 1000 + tv.tv_usec / 1000; +} +/*---------------------------------------------------------------------------*/ diff --git a/Applications/netd/clock-arch.h b/Applications/netd/clock-arch.h new file mode 100644 index 00000000..063b30f3 --- /dev/null +++ b/Applications/netd/clock-arch.h @@ -0,0 +1,40 @@ +/* + * Copyright (c) 2006, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack + * + * $Id: clock-arch.h,v 1.2 2006/06/12 08:00:31 adam Exp $ + */ + +#ifndef __CLOCK_ARCH_H__ +#define __CLOCK_ARCH_H__ + +typedef int clock_time_t; +#define CLOCK_CONF_SECOND 10 + +#endif /* __CLOCK_ARCH_H__ */ diff --git a/Applications/netd/clock.h b/Applications/netd/clock.h new file mode 100644 index 00000000..f34d78fd --- /dev/null +++ b/Applications/netd/clock.h @@ -0,0 +1,88 @@ +/** + * \defgroup clock Clock interface + * + * The clock interface is the interface between the \ref timer "timer library" + * and the platform specific clock functionality. The clock + * interface must be implemented for each platform that uses the \ref + * timer "timer library". + * + * The clock interface does only one this: it measures time. The clock + * interface provides a macro, CLOCK_SECOND, which corresponds to one + * second of system time. + * + * \sa \ref timer "Timer library" + * + * @{ + */ + +/* + * Copyright (c) 2004, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack + * + * Author: Adam Dunkels + * + * $Id: clock.h,v 1.3 2006/06/11 21:46:39 adam Exp $ + */ +#ifndef __CLOCK_H__ +#define __CLOCK_H__ + +#include "clock-arch.h" + +/** + * Initialize the clock library. + * + * This function initializes the clock library and should be called + * from the main() function of the system. + * + */ +void clock_init(void); + +/** + * Get the current clock time. + * + * This function returns the current system clock time. + * + * \return The current clock time, measured in system ticks. + */ +clock_time_t clock_time(void); + +/** + * A second, measured in system clock time. + * + * \hideinitializer + */ +#ifdef CLOCK_CONF_SECOND +#define CLOCK_SECOND CLOCK_CONF_SECOND +#else +#define CLOCK_SECOND (clock_time_t)32 +#endif + +#endif /* __CLOCK_H__ */ + +/** @} */ diff --git a/Applications/netd/coconic.c b/Applications/netd/coconic.c new file mode 100644 index 00000000..a42c2d7a --- /dev/null +++ b/Applications/netd/coconic.c @@ -0,0 +1,160 @@ +/* + This is a net_native device driver for Jim Brain's CoCoNIC card. This + card is based on the CS8900A, and Jim's design uses the "I/O Memory Access", + mapping the NIC's 16 bytes of access regs to 0xff40. + + note: This plays with I/O memory, of course, and shouldn't be in userspace!!! + + TODO: dedicated polling routine for in-kernel operation + +*/ + +#include +#include +#include "device.h" +#include "uip.h" + + +#define rxtx *(volatile uint16_t *)0xff40 /* rxrx data */ +#define rxtx8low *(volatile uint8_t *)0xff40 /* Low byte of rxtx data */ +#define rxtx8hi *(volatile uint8_t *)0xff41 /* high byte of rxtx data */ +#define txcmd *(volatile uint16_t *)0xff44 /* transmit command register */ +#define txlen *(volatile uint16_t *)0xff46 /* transmit length register */ +#define pageptr *(volatile uint16_t *)0xff4a /* packetpage pointer register */ +#define pagedata *(volatile uint16_t *)0xff4c /* packetpage data register */ +#define page8low *(volatile uint8_t *)0xff4c /* packetpage data register */ +#define page8hi *(volatile uint8_t *)0xff4d /* packetpage data register */ + + + +/* swap bytes in word */ +#define bswap( v ) ( v << 8 ) | ( v >> 8 ) + + +/* Get 16 bit word from NIC */ +static uint16_t getpp( uint16_t addr ) +{ + /* for 16 bit read fixed card + pageptr = bswap( addr ); + return bswap( pagedata ); + */ + pageptr = bswap( addr ); + return ( page8hi << 8 ) | page8low; +} + +/* set 16 bit word to packetpage */ +static void setpp( uint16_t addr, uint16_t data ){ + pageptr = bswap( addr ); + pagedata = bswap( data ); +} + +/* get status / length */ +static uint16_t getlen( void ) +{ + return (rxtx8hi << 8 ) | rxtx8low ; +} + +/* drop a frame */ +static void drop( void ) +{ + setpp( 0x102, getpp( 0x102 ) | 0x40 ); +} + + + + +/* send sbuf, size len to the device + returns 0 on success, -1 on error + */ +int device_send( char *sbuf, int len ) +{ + int alen; + uint16_t *ptr = (uint16_t *)sbuf; + + /* send transmit command, length */ + txcmd = bswap( 0x00c0 ); + txlen = bswap( len ); + /* round up for word acesses to NIC */ + alen = (len + 1) / 2; + /* wait for room in NIC, drop received frames if necessary */ + while( ! (getpp( 0x138 ) & 0x0100) ) + drop(); + /* send words from frame to NIC */ + while( alen-- ){ + //rxtx = *ptr++; + rxtx8low = *sbuf++; + rxtx8hi = *sbuf++; + } + return 0; +} + + +/* get sbuf, max size len from the device + returns size of recieved packets, 0 if nothing waiting +*/ +int device_read( char *buf, int len ) +{ + int rlen, alen; + uint16_t *ptr = (uint16_t *)buf; + + /* return if there is no packet waiting for us */ + if( ! (getpp( 0x124 ) & 0xd00) ) + return 0; + /* drop status */ + rlen = getlen(); + /* get length */ + rlen = getlen(); + /* word access round-up */ + alen = (rlen + 1) / 2; + /* packet too big for our buffer?*/ + if( alen*2 > len ){ + drop(); + return 0; + } + /* get words from NIC into buffer */ + while( alen-- ){ + //*ptr++ = rxtx; + *buf++ = rxtx8low; + *buf++ = rxtx8hi; + } + return rlen; +} + + + +/* initialize device + returns 0 on success, -1 on error +*/ +int device_init( void ) +{ + /* check for card */ + uint16_t id = getpp( 0x0000 ); + if( id != 0x630e ){ + fprintf( stderr, "CoCoNIC card not found\n", id ); + return -1; + } + /* set MAC address of card */ + pageptr = bswap( 0x158 ); + page8low = uip_lladdr.addr[0]; + page8hi = uip_lladdr.addr[1]; + + pageptr = bswap( 0x15a ); + page8low = uip_lladdr.addr[2]; + page8hi = uip_lladdr.addr[3]; + + pageptr = bswap( 0x15c ); + page8low = uip_lladdr.addr[4]; + page8hi = uip_lladdr.addr[5]; + + /* turn on receiver / transmitter */ + setpp( 0x112, 0x00d3 ); + /* allow reception of our address frames and broadcasts */ + setpp( 0x104, 0x0d05 ); + + return 0; +} + + + + + diff --git a/Applications/netd/device.h b/Applications/netd/device.h new file mode 100644 index 00000000..e3844aae --- /dev/null +++ b/Applications/netd/device.h @@ -0,0 +1,27 @@ +/* + + Device Driver header for uip/fuzix + + + */ + +/* implemented by device: */ + +/* send sbuf, size len to the device + returns 0 on success, -1 on error + */ +int device_send( char *sbuf, int len ); + + +/* get sbuf, max size len from the device + returns size of recieved packets, 0 if nothing waiting +*/ +int device_read( char *buf, int len ); + + + +/* initialize device + returns 0 on success, -1 on error +*/ +int device_init( void ); + diff --git a/Applications/netd/dig.c b/Applications/netd/dig.c new file mode 100644 index 00000000..eceae764 --- /dev/null +++ b/Applications/netd/dig.c @@ -0,0 +1,238 @@ +/* + A Cheesey Dig Client + + todo: + allow setting of dns server :) + +*/ + +#include +#include +#include +#include +#include +#include +#include +#include "netdb.h" + +struct header{ + uint16_t id; + uint8_t cntl; + uint8_t ret; + uint16_t qdcount; + uint16_t ancount; + uint16_t nscount; + uint16_t arcount; +}; + +struct RRtail{ + uint16_t type; + uint16_t class; + uint32_t ttl; + uint16_t rdlen; +}; + + +int fd; +char buf[1024]; + + +void alarm_handler( int signum ){ + return; +} + + +int send_question( char *name ){ + struct header *p=( struct header *)buf; + struct RRtail *t; + + memset( p, 0, sizeof(buf) ); + p->id = 42; /* "random" query ID */ + p->cntl = 0x1; /* request a recursive query */ + p->qdcount = 1; /* one question */ + /* fill out name string */ + char *i = name; + char *o = buf + sizeof(struct header); + char *l = o++; + + while(1){ + if( ! *i ) + break; + if( *i == '.' ){ + *l = o - l - 1 ; + i++; + l = o++; + } + else + *o++ = *i++; + } + *l = o - l - 1; + *o++ = 0; + /* fill out rest of RR */ + t = (struct RRtail *)o; + /* type: A record */ + t->type = htons(1); + /* class: inet */ + t->class = htons(1); + o += 4; + + write( fd, buf, (int)(o - buf) ); + +} + +void print_name( char *ptr ){ + while(1){ + if( *ptr == 0 ){ + break; + } + if( (*ptr & 0xc0) == 0xc0 ){ + ptr = buf + *(ptr + 1); + continue; + } + fwrite( ptr + 1, *ptr, 1, stdout ); + // write(1, ptr + 1, *ptr ); + printf("."); + ptr += *ptr + 1; + } + printf("\t\t"); + return; +} + + +print_entry( char **pptr, int no ){ + struct RRtail *t; + int i,j; + char *ptr = *pptr; + for( i = 0; i < no; i++ ){ + print_name( ptr ); + while(1){ + if( *ptr == 0 ){ + ptr++; + break; + } + if( (*ptr & 0xc0) == 0xc0 ){ + ptr += 2; + break; + } + ptr += *ptr + 1; + } + t = (struct RRtail *)ptr; + ptr += sizeof( struct RRtail); + + /* cname */ + if( t->type == 6 ){ + printf( "SOA "); + print_name( ptr ); + ptr += t->rdlen; + } + else if( t->type == 5 ){ + printf( "CNAME "); + print_name( ptr ); + ptr += t->rdlen; + } + else if( t->type == 1 ){ + printf( "A "); + for( j=0; jrdlen; j++ ) + printf("%d.",*ptr++ ); + } + else{ + printf( "??? "); + ptr += t->rdlen; + } + printf("\n"); + } + *pptr = ptr; +} + +int main( int argc, char *argv[] ){ + + struct sockaddr_in addr; + int x; + int tries = 5; + + fd = socket( AF_INET, SOCK_DGRAM, 0); + if( fd < 0 ){ + perror("socket"); + exit(1); + } + + addr.sin_family = AF_INET; + addr.sin_port = htons( 53 ); + inet_pton( AF_INET, "192.168.1.1", &addr.sin_addr.s_addr ); + + if( connect( fd, (struct sockaddr *)&addr, sizeof(addr) ) < 0 ){ + perror("connect"); + exit(1); + } + + for( ; tries ; tries-- ){ + send_question( argv[1] ); + signal( SIGALRM, alarm_handler ); + alarm(2); + x = read( fd, buf, 1024 ); + if( x <= 0 ) + continue; + goto process; + } + perror("timeout"); + exit(1); + + process: + /* process packet */ + { + struct header *h = (struct header *)buf; + + char *ptr; + int i,j; + + if( h->id != 42 ){ + fprintf( stderr, "bad ID\n"); + exit(1); + } + + if( ! h->cntl & 0x80 ){ + fprintf( stderr, "not an answer\n"); + exit(1); + } + + if( ! h->ret & 0x80 ){ + fprintf( stderr, "server doesn't do recursion\n"); + } + /* skip over our question(s) */ + printf("qust: %d, ans: %d, ns: %d, add: %d\n", + h->qdcount, h->ancount, h->nscount, h->arcount ); + ptr = buf + sizeof( struct header ); + printf("questions:\n"); + /* move ptr past questions */ + for( i = 0; i < h->qdcount; i++ ){ + print_name( ptr ); + printf("\n"); + while(1){ + if( *ptr == 0 ){ + ptr++; + break; + } + if( (*ptr & 0xc0) == 0xc0 ){ + ptr += 2; + break; + } + ptr += *ptr + 1; + } + ptr +=4; + } + /* print out answers */ + if( h->ancount ){ + printf("answers:\n"); + print_entry( &ptr, h->ancount ); + } + if( h->nscount ){ + printf("authority:\n"); + print_entry( &ptr, h->nscount ); + } + if( h->arcount ){ + printf("addional:\n"); + print_entry( &ptr, h->arcount ); + } + } + exit(0); +} diff --git a/Applications/netd/echoping.c b/Applications/netd/echoping.c new file mode 100644 index 00000000..7fc824f7 --- /dev/null +++ b/Applications/netd/echoping.c @@ -0,0 +1,45 @@ +/* + Echoping - A udp test client + send some text to an udp echo server, waits for reply, prints it. + */ + +#include +#include +#include +#include +#include +#include + + +int main( int argc, char *argv[] ){ + + struct sockaddr_in addr; + int fd; + char buf[1024]; + int x; + + fd = socket(AF_INET, SOCK_DGRAM, 0); + if( fd < 0 ){ + perror("socket()"); + exit(1); + } + + addr.sin_family = AF_INET; + addr.sin_port = htons(7); + inet_pton( AF_INET, "192.168.42.1", &addr.sin_addr.s_addr ); + + if( connect( fd, (struct sockaddr *) &addr, sizeof(addr)) < 0 ){ + perror("connect"); + exit(1); + } + + write( fd, "This is a test!", 16 ); + sleep(1); + write( fd, "This is a test!", 16 ); + + x=read( fd, buf, 1024 ); + printf("read %d: >%s<\n", x, buf ); + + exit(0); + +} diff --git a/Applications/netd/fuzix-conf.h b/Applications/netd/fuzix-conf.h new file mode 100644 index 00000000..76f50510 --- /dev/null +++ b/Applications/netd/fuzix-conf.h @@ -0,0 +1,23 @@ +#include +#include +#include + +#define UIP_CONF_STATISTICS 0 +#define CCIF + +typedef uint8_t uip_tcp_appstate_t; +typedef uint8_t uip_udp_appstate_t; +typedef uint8_t uip_stats_t; + +#define UIP_APPCALL netd_appcall +#define UIP_UDP_APPCALL netd_udp_appcall + +#define UIP_CONF_LLH_LEN 14 + +#define UIP_CONF_BYTE_ORDER UIP_BIG_ENDIAN + +#define UIP_CONF_ACTIVE_OPEN 1 + +#define UIP_CONF_RECEIVE_WINDOW 1500 + +#define MIN(n, m) (((n) < (m)) ? (n) : (m)) diff --git a/Applications/netd/fuzix-netd.pkg b/Applications/netd/fuzix-netd.pkg new file mode 100644 index 00000000..90b46c9f --- /dev/null +++ b/Applications/netd/fuzix-netd.pkg @@ -0,0 +1,20 @@ +package netd-base +if-file dig +f 0644 /etc/netrc netrc +f 0644 /etc/resolv.conf resolv.conf +f 0755 /usr/bin/dig dig +f 0755 /usr/bin/echoping echoping +f 0755 /usr/bin/telnet telnet +n 20666 1089 /dev/net + + +package netd-lwwire +if-file netd-lwwire +f 0755 /usr/bin/netd-lwwire netd-lwwire +n 060666 2048 /dev/dw0 + +package netd-coconic +if-file netd-coconic +f 0755 /usr/bin/netd-coconic netd-coconic + + diff --git a/Applications/netd/gethostbyname.c b/Applications/netd/gethostbyname.c new file mode 100644 index 00000000..3f1135a9 --- /dev/null +++ b/Applications/netd/gethostbyname.c @@ -0,0 +1,252 @@ +/* A stab at a resolver + + NOTES: + * only does recursive querries, doesn't to iterative. + + TODO: + * needs to read rc file + * retranslate textual IP address + * should work with TCP too + * fill out more of hostent struct + +*/ + +#include +#include +#include +#include +#include +#include +#include "netdb.h" + +/* DNS packet header */ +struct header{ + uint16_t id; /* unique session ID */ + uint8_t cntl; /* bit fields - mostly request stuff */ + uint8_t ret; /* bit feilds - mostly return/stat stuff */ + uint16_t qdcount; /* number of queries */ + uint16_t ancount; /* number of answers */ + uint16_t nscount; /* number of suggested name servers */ + uint16_t arcount; /* number of suggested name server IP addresses */ +}; + +/* Tail of Returned resource records (RR's) */ +struct RRtail{ + uint16_t type; /* which type of record, 1 = A, IP address */ + uint16_t class; /* which network class, 1 = inet */ + uint32_t ttl; /* time to live of records in secounds */ + uint16_t rdlen; /* length of following data field, 4 for IP addresses */ +}; + +#define MAXADDRS 4 /* max number of address stored in hostent struct */ + + +/* Does nothing, used for timing out waiting for DNS packet(s) */ +static void alarm_handler( int signum ){ + return; +} + +static int fd; /* file descriptor for inet socket */ +static char buf[512]; /* packet buffer */ + + +/* formulate and send a DNS query packet */ +static int send_question( char *name ){ + struct header *p=( struct header *)buf; + struct RRtail *t; + + memset( p, 0, sizeof(buf) ); + p->id = 42; /* "random" query ID */ + p->cntl = 0x1; /* request a recursive query */ + p->qdcount = 1; /* one question */ + /* fill out name string */ + char *i = name; + char *o = buf + sizeof(struct header); + char *l = o++; + + while(1){ + if( ! *i ) + break; + if( *i == '.' ){ + *l = o - l - 1 ; + i++; + l = o++; + } + else + *o++ = *i++; + } + *l = o - l - 1; + *o++ = 0; + /* fill out rest of RR */ + t = (struct RRtail *)o; + /* type: A record */ + t->type = htons(1); + /* class: inet */ + t->class = htons(1); + o += 4; + + write( fd, buf, (int)(o - buf) ); + +} + + + +int h_errno; /* Return error indicator */ + +static char addrs[MAXADDRS][4]; /* hostent static address table */ + +static char *list[MAXADDRS+1]; /* hostent static list of addresses */ + +static struct hostent host={ /* static returned hostent struct */ + NULL, + NULL, + AF_INET, + 4, + list +}; + + +/* Get a host by it's name */ +struct hostent *gethostbyname( char *name ){ + struct sockaddr_in addr; + int x; + int tries = 5; + int lno=0; + char *ptr; + char server[17]; + char *ws = " \f\n\r\t\v"; + + /* Try to just translate passed stringified IP address */ + x = inet_pton( AF_INET, name, list[0] ); + if( x == 1 ){ + list[1] = NULL; + return &host; + } + + /* open up /etc/resolv.conf and read in + fixme: handles only small config files < 512 bytes + fixme: if we have other gethostby-whatever functions, this should + be factored out as it's own static function */ + fd = open( "/etc/resolv.conf", O_RDONLY ); + if( fd < 0 ){ + return NULL; + } + x = read( fd, buf, 511 ); + if( x < 1 ){ + close( fd ); + return NULL; + } + buf[x]=0; + ptr = strtok( buf, ws ); + while( ptr ){ + if( ! strcmp( ptr, "nameserver" ) ){ + ptr=strtok( NULL, ws ); + if( ptr == NULL ){ + return NULL; + } + strcpy( server, ptr ); + } + ptr = strtok( NULL, ws ); + } + + + fd = socket( AF_INET, SOCK_DGRAM, 0); + if( fd < 0 ){ + return NULL; + } + + addr.sin_family = AF_INET; + addr.sin_port = htons( 53 ); + + inet_pton( AF_INET, server, &addr.sin_addr.s_addr ); + + if( connect( fd, (struct sockaddr *)&addr, sizeof(addr) ) < 0 ) + goto error; + + for( ; tries ; tries-- ){ + send_question( name ); + signal( SIGALRM, alarm_handler ); + alarm(2); + x = read( fd, buf, 512 ); + if( x < 0 ) + continue; + goto process; + } + h_errno = HOST_NOT_FOUND; + goto error; + + process: + /* process packet */ + { + struct header *h = (struct header *)buf; + struct RRtail *t; + char *ptr; + int i,j; + + if( h->id != 42 ) /* correct session ID ? */ + goto error; + + if( ! h->cntl & 0x80 ) /* is an answer packet? */ + goto error; + + if( ! h->ret & 0x80 ) /* is a recursive answer? */ + goto error; + + if( ! h->ancount ) /* is there any answers? */ + goto error; + + /* skip over our question(s) */ + ptr = buf + sizeof( struct header ); + for( i = 0; i < h->qdcount && i < 4; i++ ){ + while(1){ + if( *ptr == 0 ){ + ptr++; + break; + } + if( (*ptr & 0xc0) == 0xc0 ){ + ptr += 2; + break; + } + ptr += *ptr + 1; + } + ptr +=4; + } + /* cap answers at MAXADDRS */ + if( h->ancount > MAXADDRS ) + h->ancount = MAXADDRS; + /* Iterate over answers */ + for( i = 0; i < h->ancount; i++ ){ + /* parse off name */ + while(1){ + if( *ptr == 0 ){ + ptr++; + break; + } + if( (*ptr & 0xc0) == 0xc0 ){ + ptr += 2; + break; + } + ptr += *ptr + 1; + } + /* point to rest of RR structure */ + t = (struct RRtail *)ptr; + ptr += sizeof( struct RRtail); + if( t->type == 0x01 ){ + for( j=0; jrdlen; j++ ) + addrs[lno][j] = *ptr++; + } + else{ + ptr += t->rdlen; + } + list[lno] = &addrs[lno][0]; + lno++; + } + list[lno] = NULL; + } + close(fd); + return &host; + error: + close(fd); + return NULL; +} + diff --git a/Applications/netd/httpd.c b/Applications/netd/httpd.c new file mode 100644 index 00000000..0a6d27be --- /dev/null +++ b/Applications/netd/httpd.c @@ -0,0 +1,57 @@ +/* + + A simple http server + + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +struct sockaddr_in addr; +struct sockaddr_in laddr; +int lfd; + + +my_open( int argc, char *argv[]){ + int port = 80; /* default port */ + + addr.sin_port = htons(port); + addr.sin_family = AF_INET; + + lfd = socket(AF_INET, SOCK_STREAM, 0); + if (lfd < 0) { + perror("af_inet sock_stream 0"); + exit(1); + } + + if( bind( lfd, &addr, sizeof(addr) ) ){ + perror("bind"); + exit(1); + } + + if( listen( lfd, 1 ) ){ + perror("connect"); + exit(1); + } +} + +int main( int argc, char *argv[]){ + int len; + + my_open( argc, argv ); + printf("httpd server\n"); + while(1); + return 0; + + +} + + diff --git a/Applications/netd/lwwire.c b/Applications/netd/lwwire.c new file mode 100644 index 00000000..469b0509 --- /dev/null +++ b/Applications/netd/lwwire.c @@ -0,0 +1,160 @@ +/* + + Network via the LWWire standard for DW4 + +*/ + +#include +#include +#include +#include +#include +#include + +#include "device.h" + +static int fd; /* fd of drivewire block device fd */ + +/* returns number of byte in next packet, 0 = nothing waiting */ +static int dwnet_poll( void ) +{ + int ret; + struct dw_trans d; + unsigned char buf[3]; + buf[0] = 0xf3; /* lwwire's extension op */ + buf[1] = 0x01; /* extension no */ + buf[2] = 0x00; /* op = poll */ + d.sbuf = buf; + d.sbufz = 3; + d.rbuf = buf; + d.rbufz = 2; + ret = ioctl( fd, DRIVEWIREC_TRANS, &d ); + if( ret < 0 ){ + return -1; + } + return (buf[0]<<8) + buf[1]; +} + + +/* drop the current packet */ +static int dwnet_drop( void ) +{ + int ret; + struct dw_trans d; + unsigned char buf[3]; + buf[0] = 0xf3; /* lwwire's extension op */ + buf[1] = 0x01; /* extension no */ + buf[2] = 0x04; /* op = drop */ + d.sbuf = buf; + d.sbufz = 3; + d.rbuf = NULL; + d.rbufz = 0; + ret = ioctl( fd, DRIVEWIREC_TRANS, &d ); + if( ret < 0 ){ + return -1; + } + return 0; +} + +/* receive packet to a buffer */ +static int dwnet_recv( unsigned char *b, int len ) +{ + int ret; + struct dw_trans d; + unsigned char buf[3]; + buf[0] = 0xf3; /* lwwire's extension op */ + buf[1] = 0x01; /* extension no */ + buf[2] = 0x01; /* op = read */ + d.sbuf = buf; + d.sbufz = 3; + d.rbuf = b; + d.rbufz = len; + ret = ioctl( fd, DRIVEWIREC_TRANS, &d ); + if( ret < 0 ){ + return -1; + } + return 0; +} + +/* received a chunked packets */ +static int dwnet_recv_chunk( unsigned char *b, int size ) +{ + int ret; + struct dw_trans d; + unsigned char buf[3]; + buf[0] = 0xf3; /* lwwire's extension op */ + buf[1] = 0x01; /* extension no */ + buf[2] = 0x03; /* op = read chunk */ + d.sbuf = buf; + d.sbufz = 3; + d.rbuf = b; + d.rbufz = size; + ret = ioctl( fd, DRIVEWIREC_TRANS, &d ); + if( ret < 0 ){ + return -1; + } + return 0; +} + +/* send packet to net device */ +int device_send( char *sbuf, int len ) +{ + int ret; + struct dw_trans d; + unsigned char buf[5]; + buf[0] = 0xf3; /* lwwire's extension op */ + buf[1] = 0x01; /* extension no */ + buf[2] = 0x02; /* op = send */ + buf[3] = len >> 8; + buf[4] = len & 0xff ; + d.sbuf = buf; + d.sbufz = 5; + d.rbuf = 0; + d.rbufz = 0; + ret = ioctl( fd, DRIVEWIREC_TRANS, &d ); + if( ret < 0 ) + return -1; + d.sbuf = sbuf; + d.sbufz = len; + d.rbuf = 0; + d.rbufz = 0; + ret = ioctl( fd, DRIVEWIREC_TRANS, &d ); + if( ret < 0 ) + return -1; + return 0; +} + +#define CHUNKZ 511 + + +int device_read( char *buf, int len ) +{ + int packetz; + int l; + int s; + l = packetz = dwnet_poll(); + if( l > len ){ + dwnet_drop(); + } + while( l > 0 ){ + if( l > CHUNKZ ) + s = CHUNKZ; + else + s = l; + dwnet_recv_chunk( buf, s ); + buf += CHUNKZ; + l -= CHUNKZ; + } + return packetz; +} + +/* initialize network device */ +int device_init( void ) +{ + fd=open( "/dev/dw0", O_RDONLY, 0 ); + if( fd < 0 ){ + return -1; + } + return 0; +} + diff --git a/Applications/netd/netd.c b/Applications/netd/netd.c new file mode 100644 index 00000000..22d2789e --- /dev/null +++ b/Applications/netd/netd.c @@ -0,0 +1,760 @@ +/* + +*** Experimental **** + +A Contiki/uIP based net_native implementation for Fuzix. This runs +as a user-space daemon. + + +There are two event "threads" - one for the kernel messages, and one for +uIP's messages... these "threads" are round-robin'ed together in main(). + + +issues: +* is this the correct kernel call / data struct for ticks ? +* select() is not used, but should be. + +todo: + +* deamonize (detach) this proggie. (will we always have setsid() ? ) +* UDP local bind +* TCP passive open + + +*/ + + + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "uip.h" +#include "timer.h" +#include "uip_arp.h" +#include "clock.h" +#include "netd.h" +#include "uiplib.h" +#include "device.h" + +#define BUF ((struct uip_eth_hdr *)&uip_buf[0]) + +int bfd; /* fd of data backing file */ +int knet; /* fd of kernel's network inface */ +int rc; /* fd of rc file */ +struct sockmsg sm; /* event from kernel iface */ +struct netevent ne; /* event to kernel iface */ +struct timer periodic_timer, arp_timer; + +/* 'links' associate a kernel socket no to a uIP connection pointer + and hold some useful state. Fuzix inits a new socket well before + uIP, so a separate linkage/state struct is needed. +*/ +struct link map[NSOCKET]; +int freelist[NSOCKET]; +int freeptr = 0; + + +/* print an error message */ +void printe( char *mesg ) +{ + write(2, mesg, strlen(mesg)); +} + +/* print an error message an quit w/ error */ +void exit_err( char *mesg ) +{ + printe( mesg ); + exit(1); +} + +/* wrapper around writing to kernel net device */ +void ksend( int event ) +{ + ne.ret = 0; + ne.event = event; + if ( write( knet, &ne, sizeof(ne) ) < 0 ) + exit_err("cannot write kernel net dev\n"); +} + + +/* allocate a connection linkage */ +int get_map( void ) +{ + int new = freelist[ --freeptr ]; + memset( &map[new], 0, sizeof( map[new] ) ); + return new; +} + +/* release a linkage */ +void rel_map( int n ) +{ + freelist[ freeptr++ ] = n; +} + +/* initialize the free map of links */ +void init_map( void ) +{ + int n; + for ( n = 0; nsocketn * RINGSIZ * 2 + RINGSIZ; + if ( ! s->len ) return; + lseek( bfd, base + s->tstart, SEEK_SET ); + if ( read( bfd, uip_appdata, s->len ) < 0 ) + exit_err("cannot read from backing file\n"); + uip_send( uip_appdata, s->len ); +} + +/* send udp data */ +void send_udp( struct link *s ) +{ + /* Send packet to net */ + uint32_t base = s->socketn * RINGSIZ * 2 + RINGSIZ; + uint16_t len = s->tsize[s->tstart]; + lseek( bfd, base + s->tstart * TXPKTSIZ, SEEK_SET ); + if ( read( bfd, uip_appdata, len ) < 0 ) + exit_err("cannot read from backing file\n"); + uip_udp_send( len ); + if ( ++s->tstart == NSOCKBUF ) + s->tstart = 0; + /* Send Room event back to kernel */ + ne.socket = s->socketn; + ne.data = s->tstart; + ksend( NE_ROOM ); +} + +/* return amout of free room for adding data in recv ring buffer */ +uint16_t room( struct link *s ) +{ + uint16_t t = 0; + if ( s->rstart > s->rend ) + t = s->rstart - s->rend; + else + t = RINGSIZ - (s->rend - s->rstart); + return t-1; +} + +/* return capacity of data in transmit ring buffer */ +uint16_t cap( struct link *s ) +{ + if ( s->tstart > s->tend ) + return RINGSIZ - (s->tstart - s->tend); + else + return s->tend - s->tstart; +} + +/* uIP callback for TCP events */ +void netd_appcall() +{ + /* + printe( "appcall: " ); + if( uip_aborted() ) printe("aborted.\n"); + if( uip_acked() ) printe("acked.\n"); + if( uip_closed() ) printe("closed.\n"); + if( uip_newdata() ) printe("new data.\n"); + if( uip_poll() ) printe("polled.\n"); + if( uip_rexmit() ) printe("rexmit.\n"); + if( uip_timedout() ) printe("timed out.\n"); + if( uip_connected() ) printe("connected.\n" ); + */ + struct link *s = & map[uip_conn->appstate]; + ne.socket = s->socketn; + + /* uIP sends up a connected event for both + active and passive opens */ + if ( uip_connected() ){ + int flag = 0; + /* find see if anything is listening on this port */ + { + int i; + for ( i = 0; i< NSOCKET; i++ ){ + if ( map[i].port == uip_conn->lport ){ + /* found a listening port */ + /* FIXME: what am I supposed to send to the + listening socket? + */ + ne.data = SS_ACCEPTWAIT; + ksend( NE_EVENT ); + /* make a new link and Associate the new uip_connection + with some lcn/socket the kernel readied */ + flag = 1; + break; + } + } + } + if ( ! flag ){ + /* Not a listing port so assume a active open */ + ne.data = SS_CONNECTED; + ksend( NE_NEWSTATE ); + } + } + + + if ( uip_newdata() ){ + /* there new data in the packet buffer */ + uint16_t len = uip_datalen(); + uint16_t l; + char *ptr = uip_appdata; + uint32_t base = ne.socket * RINGSIZ * 2; + if ( room(s) < len ) + exit_err("RECV OVERFLOW!\n"); + while ( len ){ + if ( s->rend >= s->rstart ) /* not wrapped */ + l = RINGSIZ - s->rend; + else + l = s->rstart - s->rend - 1; + if ( l > len ) + l = len; + lseek( bfd, base + s->rend, SEEK_SET ); + if ( write( bfd, ptr, l ) < 0 ) + exit_err("cannot write to backing file\n"); + ptr += l; + s->rend += l; + if ( s->rend == RINGSIZ ) + s->rend = 0; + len -= l; + } + /* throttle incoming data if there's no room in ring buf */ + if ( room(s) < UIP_RECEIVE_WINDOW ) + uip_stop(); + /* tell kernel we have data */ + ne.data = s->rend; + /* ne.info = ???; for udp only? */ + ksend( NE_DATA ); + } + + if ( uip_acked() ){ + /* actually remove the bytes from the ring + * and send ROOM notice to kernel */ + ne.data = (s->tstart + s->len) & (RINGSIZ - 1); + s->tstart = ne.data; /* adjust local copy also!!! */ + ksend( NE_ROOM ); + s->len = 0; + } + + if ( uip_poll() ){ + uint16_t len; + + /* if flow stopped, check to see if there's enough room + to start it again. + */ + if ( uip_stopped(uip_conn) && ( room(s) >= UIP_RECEIVE_WINDOW) ) + uip_restart(); + + /* send data if there is some in the xmit ringbuf */ + if ( ! s->len ){ + if ( s->tend != s->tstart ){ + if ( s->tend > s->tstart ) /* not wrapped */ + len = s->tend - s->tstart; + else /* wrapped - just go to logical end of data */ + len = RINGSIZ - s->tstart; + /* don't send more than TCP will actually send */ + if ( uip_mss() < len ) + s->len = uip_mss(); + else + s->len = len; + send_tcp( s ); + } + } + + /* test for local close - LINK_CLOSED is set by kernel event thread */ + if ( s->flags & LINK_CLOSED ){ + uip_close(); + s->flags &= ~LINK_CLOSED; + s->flags |= LINK_SHUTW; + if ( s->flags & LINK_SHUTR ) + rel_map( uip_conn->appstate ); + } + + } + + if ( uip_rexmit() ){ + /* resend data */ + send_tcp( s ); + } + + if ( uip_closed() || uip_aborted() ){ + int e; + switch ( s->flags & (LINK_SHUTR | LINK_SHUTW) ){ + case 0: + e = NE_SHUTR; + break; + case LINK_SHUTR: + goto close; + case LINK_SHUTW: + e = NE_NEWSTATE; + break; + case LINK_SHUTR | LINK_SHUTW: + return; + } + /* formulate and send reset of message */ + ne.data = SS_CLOSED; + ksend( e ); + /* release link resource if both sides closed */ + /* mark link as remote closed */ + close: + s->flags |= LINK_SHUTR; + if ( s->flags & LINK_SHUTW ) + rel_map( uip_conn->appstate ); + } +} + + + +/* uIP callbck for UDP event */ +void netd_udp_appcall() +{ + /* debug + printe( "appcall udp: " ); + if( uip_aborted() ) printe("aborted"); + if( uip_acked() ) printe("acked"); + if( uip_closed() ) printe("closed"); + if( uip_newdata() ) printe("new data"); + if( uip_poll() ) printe("polled"); + if( uip_rexmit() ) printe("rexmit"); + if( uip_timedout() ) printe("timed out"); + if( uip_connected() ) printe("connected" ); + printe("\n"); + */ + + struct link *s = & map[uip_udp_conn->appstate]; + ne.socket = s->socketn; + + if ( uip_poll() ){ + /* send data if there's data waiting on this connection */ + /* doing this before testing for close ??? */ + if ( s->tend != s->tstart ){ + send_udp( s ); + return; /* short circuit LINK_CLOSED until EOD. */ + } + /* if flagged close from kernel, then really close, confirm w/ kernel */ + if ( s->flags & LINK_CLOSED ){ + /* send closed event back to kernel */ + ne.socket = sm.s.s_num; + ne.data = SS_CLOSED; + ksend( NE_NEWSTATE ); + /* release private link resource */ + rel_map( uip_udp_conn->appstate ); + uip_udp_remove( uip_udp_conn ); + return; + } + } + + if ( uip_newdata() ){ + /* there new data in the packet buffer */ + uint16_t len = uip_datalen(); + char *ptr = uip_appdata; + uint32_t base = ne.socket * RINGSIZ * 2; + + if ( (s->rend + 1)&(NSOCKBUF-1) == s->rstart ) + return; /* full - drop it */ + s->rsize[s->rend] = len; + memcpy( &ne.info, s->rsize, sizeof(uint16_t) * NSOCKBUF ); + lseek( bfd, base + s->rend * RXPKTSIZ, SEEK_SET ); + if ( write( bfd, ptr, len ) < 0 ) + exit_err("cannot write to backing file\n"); + if ( ++s->rend == NSOCKBUF ) + s->rend = 0; + /* FIXME: throttle incoming data if there's no room in ring buf */ + /* tell kernel we have data */ + ne.data = s->rend; + /* ne.info = ???; for udp only? */ + ksend( NE_DATA ); + } +} + + +/* unused (for now) */ +void uip_log(char *m) +{ + fprintf( stderr, "uIP: %s\n", m); +} + + +/* handle events from kernel */ +/* returns 0 if nothing going on */ +int dokernel( void ) +{ + struct link *m; + int i = read( knet, &sm, sizeof(sm) ); + if ( i < 0 ){ + return 0; + } + else if ( i == sizeof( sm ) && sm.sd.event & 127 ){ + /* debug + fprintf(stderr,"read size: %d ", i ); + fprintf(stderr,"knet lcn: %d ", sm.sd.lcn ); + fprintf(stderr,"event: %x ", sm.sd.event ); + fprintf(stderr,"newstat: %x\n", sm.sd.newstate ); + */ + m = & map[sm.sd.lcn]; + if ( sm.sd.event & NEV_STATE ){ + ne.socket = sm.s.s_num; + switch ( sm.sd.newstate ){ + case SS_UNCONNECTED: + ne.data = get_map(); /* becomes lcn */ + map[ne.data].len = 0; + map[ne.data].socketn = sm.s.s_num; + ksend( NE_INIT ); + break; + case SS_BOUND: + /* FIXME: probably needs to do something here */ + ne.data = SS_BOUND; + ksend( NE_NEWSTATE ); + break; + case SS_CONNECTING: + if ( sm.s.s_type == SOCKTYPE_TCP ){ + struct uip_conn *conptr; + uip_ipaddr_t addr; + int port = sm.s.s_addr[SADDR_DST].port; + uip_ipaddr_copy( &addr, (uip_ipaddr_t *) + &sm.s.s_addr[SADDR_DST].addr ); + /* need some HTONS'ing done here? */ + conptr = uip_connect( &addr, port ); + if ( !conptr ){ + break; /* fixme: actually handler the error */ + } + m->conn = conptr; /* fixme: needed? */ + conptr->appstate = sm.sd.lcn; + break; + } + else if ( sm.s.s_type == SOCKTYPE_UDP ){ + struct uip_udp_conn *conptr; + uip_ipaddr_t addr; + int port = sm.s.s_addr[SADDR_DST].port; + uip_ipaddr_copy( &addr, (uip_ipaddr_t *) + &sm.s.s_addr[SADDR_DST].addr ); + /* need some HTONS'ing done here? */ + conptr = uip_udp_new( &addr, port ); + if ( !conptr ){ + break; /* fixme: actually handler the error */ + } + m->conn = ( struct uip_conn *)conptr; /* fixme: needed? */ + conptr->appstate = sm.sd.lcn; + /* fixme: assign local address/port !!! */ + /* refactor: same as tcp action from connect event */ + ne.data = SS_CONNECTED; + ksend( NE_NEWSTATE ); + break; + } + break; /* FIXME: handle unknown/unhandled sock types here */ + case SS_CLOSED: + if ( sm.s.s_type == SOCKTYPE_TCP ){ + m->flags += LINK_SHUTW; + /* if remote already closed then send closing synch event + directly back to kernel, and release our link */ + if ( m->flags & LINK_SHUTR ){ + ne.data = SS_CLOSED; + ksend( NE_NEWSTATE ); + rel_map( sm.sd.lcn ); + } + /* tell uIP thread that local has closed, but we + cant send anything directly to uIP from here - + so set a flag and let uip_poll() handler do the job + the next time through the main program loop + */ + else { + m->flags += LINK_CLOSED; + } + } + else if ( sm.s.s_type == SOCKTYPE_UDP ){ + m->flags += LINK_CLOSED; + } + break; + case SS_LISTENING: + /* htons here? */ + uip_listen( sm.s.s_addr[0].port ); + m->port = sm.s.s_addr[0].port; + ne.data = SS_LISTENING; + ksend( NE_NEWSTATE ); + break; + default: + break; + } + } + if ( sm.sd.event & NEV_WRITE ){ + /* can't send data now, so store needed buffer info */ + int last; + m->tstart = sm.sd.tbuf; + m->tend = sm.sd.tnext; + last = m->tend-1 & NSOCKBUF-1; + /* tsize is for udp only, but copy it anyway */ + m->tsize[last] = sm.sd.tlen[last]; + } + if ( sm.sd.event & NEV_READ ){ + int last; + m->rstart = sm.sd.rbuf; + m->rend = sm.sd.rnext; + } + return 1; + } + return 0; +} + +/* handle events from uIP */ +/* returns 0 if nothing going on */ +int douip( void ) +{ + int ret = 0; + int i = device_read( uip_buf, UIP_BUFSIZE ); + if (i > 0){ + ret = 1; + uip_len = i; + if (uip_len > 0) { + if ( BUF->type == UIP_HTONS(UIP_ETHTYPE_IP)){ + uip_arp_ipin(); + uip_input(); + if (uip_len > 0) { + uip_arp_out(); + device_send( uip_buf, uip_len); + } + }else if ( BUF->type == UIP_HTONS(UIP_ETHTYPE_ARP)){ + uip_arp_arpin(); + if (uip_len > 0 ) + device_send( uip_buf, uip_len); + } + } + } else if (timer_expired(&periodic_timer)) { + timer_reset(&periodic_timer); + for (i = 0; i < UIP_CONNS; i++) { + uip_periodic(i); + if (uip_len > 0) { + uip_arp_out(); + device_send( uip_buf, uip_len ); + } + } + for (i = 0; i < UIP_UDP_CONNS; i++) { + uip_udp_periodic(i); + if (uip_len > 0) { + uip_arp_out(); + device_send( uip_buf, uip_len ); + } + } + if ( timer_expired(&arp_timer)){ + timer_reset(&arp_timer); + uip_arp_timer(); + } + } + return ret; +} + + + + +/* Get charactor from rc file */ +/* returns charactor from file, -1 on EOF */ +int mygetc( ) +{ + static char *ibuf[80]; + static char *pos; + static int len = 0; + if ( ! len ){ + pos = (char *)ibuf; + len = read( rc, ibuf, 80 ); + if( len < -1 ) + exit_err( "Error Reading rc file.\n" ); + if( ! len ) + return -1; + } + len--; + return *pos++; +} + +/* parse next token from rc file */ +/* return -1 on EOF, */ +int word( char *buf, int max) +{ + int c; + int len = 0; + + max -= 1; + /* skip spaces */ + do { + c = mygetc(); + if ( c < 0 ) + return -1; + } while ( isspace( c ) ); + /* build token */ + while ( ! isspace( c ) && c != -1 && len < max ){ + *buf++ = c; + len++; + c = mygetc(); + } + *buf = 0; + return 0; +} + +/* parse a mac address from rc file */ +/* need dynamic conversion base ? */ +int macaddrconv( char *buf, uip_eth_addr *addr ) +{ + int i; + char *e; + for ( i = 0; i < 6; i++){ + addr->addr[i] = strtol( buf, &e, 16 ); + if ( e == buf ) + return 0; + buf = ++e; + } + return -1; +} + +/* return various errors for rcfile problems */ +void exit_badrc( void ) +{ + exit_err("error reading rc file\n" ); +} + +void exit_badaddr( void ) +{ + exit_err("rc file: bad address" ); +} + +/* get ip address from rc file */ +int getaddr( uip_ipaddr_t *ipaddr ) +{ + char buf[80]; + if ( word( buf, 80 ) ) + exit_badrc(); + if ( ! uiplib_ip4addrconv( buf, ipaddr) ) + exit_badaddr(); + return -1; +} + + +/* read, parse, and apply rc file */ +int parse_rcfile( void ){ + + int x; + char buf[80]; + uip_ipaddr_t ipaddr; /* ip address buffer */ + uip_eth_addr ethaddr; /* mac address buffer */ + + rc = open("/etc/netrc", O_RDONLY, 0 ); + if ( rc < 0 ){ + exit_err("cannot open rc file\n"); + } + while ( ! word( buf, 80 ) ){ + if ( ! strcmp( buf, "ipaddr" ) ){ + getaddr( &ipaddr ); + uip_sethostaddr(&ipaddr); + continue; + } + if ( ! strcmp( buf, "gateway" ) ){ + getaddr( &ipaddr ); + uip_setdraddr(&ipaddr); + continue; + } + if ( ! strcmp( buf, "netmask" ) ){ + getaddr( &ipaddr ); + uip_setnetmask(&ipaddr); + continue; + } + if ( ! strcmp( buf, "mac" ) ){ + if ( word( buf, 80 ) ) + exit_badrc(); + if ( ! macaddrconv( buf, ðaddr ) ) + exit_err("bad mac address\n"); + uip_setethaddr( ethaddr ); + continue; + } + if ( buf[0]== '#' ){ + int c; + do { + c = mygetc(); + } while ( c != '\n' && c != -1 ); + } + } + close(rc); + return 0; +} + + + +int main( int argc, char *argv[] ) +{ + int ret; + uip_ipaddr_t ipaddr; + uip_eth_addr ethaddr; /* mac address buffer */ + + /* where should backing file go? /var, /tmp, other? */ + bfd = open( "/tmp/net.back", O_RDWR|O_CREAT, 0644 ); + if ( bfd < 0 ){ + exit_err( "cannot open backing file\n"); + } + + /*open Kernel's net device */ + knet = open( "/dev/net", O_RDWR|O_NDELAY, 0 ); + if ( knet < 0 ){ + exit_err( "cannot open kernel net iface device\n"); + } + + /* Attach our backing file to the network device */ + ret = ioctl( knet, NET_INIT, &bfd ); + if ( ret < 0 ){ + exit_err( "cannot attach backing file\n"); + } + + /* initialize our map */ + init_map(); + + + /* + * Set up uIP + */ + + timer_set(&periodic_timer, CLOCK_SECOND / 4); + timer_set(&arp_timer, CLOCK_SECOND * 10 ); + + uip_init(); + + /* + * set default addresses structures for uIP. + */ + + /* set hostname - need a config file or cmd line here */ + /* what are a good defaults here? */ + uip_ipaddr(&ipaddr, 192,168,42,2); + uip_sethostaddr(&ipaddr); + uip_ipaddr(&ipaddr, 192,168,42,1); + uip_setdraddr(&ipaddr); + uip_ipaddr(&ipaddr, 255,255,255,0); + uip_setnetmask(&ipaddr); + + /* set default MAC address */ + ethaddr.addr[0] = 0x00; + ethaddr.addr[1] = 0x01; + ethaddr.addr[2] = 0x02; + ethaddr.addr[3] = 0x03; + ethaddr.addr[4] = 0x04; + ethaddr.addr[5] = 0x05; + uip_setethaddr(ethaddr); + + + parse_rcfile(); + + if( device_init() ){ + exit_err( "cannot init net device\n"); + } + + + while(1) { + int a,b; + a = dokernel(); + b = douip(); + if( ! (a || b) ) + _pause(3); + } +} diff --git a/Applications/netd/netd.h b/Applications/netd/netd.h new file mode 100644 index 00000000..009210da --- /dev/null +++ b/Applications/netd/netd.h @@ -0,0 +1,34 @@ +/* dwnet.h interface + + + + */ +#ifndef DWNET_H +#define DWNET_H + +struct link{ + uint8_t flags; /* flags */ +#define LINK_CLOSED 1 +#define LINK_SHUTR 2 /* don't release our link/state until */ +#define LINK_SHUTW 4 /* both are set */ + uint8_t socketn; /* Kernel's socket no */ + uint8_t lcn; /* Kernel's idea of lcn ???*/ + struct uip_conn *conn; /* uIP's idea of lcn */ + uint16_t tstart; /* start of data in transmit ring */ + uint16_t tend; /* end of data in transmit ring */ + uint16_t len; /* length of data last transmitted */ + uint16_t rstart; /* start of data in recv ring */ + uint16_t rend; /* end of data in recv ring*/ + uint16_t port; /* which port are we listening on? */ + /* for udp only */ + uint16_t tsize[NSOCKBUF]; /* number of bytes to xmit in buffer */ + uint16_t rsize[NSOCKBUF]; /* number of bytes to recv in buffers */ +}; + + +typedef uint8_t uip_tcp_appstate_t; /* index to link info */ +typedef uint8_t uip_udp_appstate_t; +void netd_appcall( void ); +void netd_udp_appcall( void ); + +#endif diff --git a/Applications/netd/netdb.h b/Applications/netd/netdb.h new file mode 100644 index 00000000..397ec086 --- /dev/null +++ b/Applications/netd/netdb.h @@ -0,0 +1,55 @@ + /* Copyright (C) 1996-2004, 2009, 2010 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* All data returned by the network data base library are supplied in + host order and returned in network order (suitable for use in + system calls). */ + + +/* Modified for fuzix by Brett M. Gordon */ + +#ifndef _NETDB_H +#define _NETDB_H + +/* Description of data base entry for a single host. */ +struct hostent +{ + char *h_name; /* Official name of host. */ + char **h_aliases; /* Alias list. */ + int h_addrtype; /* Host address type. */ + int h_length; /* Length of address. */ + char **h_addr_list; /* List of addresses from name server. */ +}; + +extern int h_errno; + +/* Possible values left in `h_errno'. */ +#define HOST_NOT_FOUND 1 /* Authoritative Answer Host not found. */ +#define TRY_AGAIN 2 /* Non-Authoritative Host not found, + or SERVERFAIL. */ +#define NO_RECOVERY 3 /* Non recoverable errors, FORMERR, REFUSED, + NOTIMP. */ +#define NO_DATA 4 /* Valid name, no data record of requested + type. */ + + +extern struct hostent *gethostbyname (char *name); + + + +#endif /* netdb.h */ diff --git a/Applications/netd/netrc b/Applications/netd/netrc new file mode 100644 index 00000000..ad90a05b --- /dev/null +++ b/Applications/netd/netrc @@ -0,0 +1,6 @@ +# netd rc file +# Please change to suite. +ipaddr 192.168.42.2 +gateway 192.168.42.1 +netmask 255.255.255.0 +mac 0:1:2:3:4:5 diff --git a/Applications/netd/resolv.conf b/Applications/netd/resolv.conf new file mode 100644 index 00000000..1ea217a9 --- /dev/null +++ b/Applications/netd/resolv.conf @@ -0,0 +1 @@ +nameserver 192.168.1.1 diff --git a/Applications/netd/telnet.c b/Applications/netd/telnet.c new file mode 100644 index 00000000..21f80778 --- /dev/null +++ b/Applications/netd/telnet.c @@ -0,0 +1,511 @@ +/* dwtelnet - Drivewire - raw Telnet + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "netdb.h" + + +#define TESC 0x19 +#define ESC 0x1b + + +char ibuf[256]; +int opos=0; + +int flags; +struct termios prior,new; +struct termios lprior,lnew; +int fddw; +int para[4]={0,0,0,0}; +int no=0; +char colors[8]={ + '0', '2', '4', '6', + '1', '3', '5', '7' +}; + +int linemode=0; +int lecho=-1; +int hex=0; +int del=0; +int crnl=-1; +int fc=7; +int bc=0; +int inten=0; + +#define AF_INET 1 +#define SOCK_STREAM 3 + + +struct sockaddr_in addr; +struct sockaddr_in laddr; + +void puterr( char *str ){ + write(2, str, strlen(str)); +} + +void putstr( char *str ){ + write(1, str, strlen(str)); +} + +int isnum( char c ){ + if( c>='0' && c<='9' ) return 1; + return 0; +} + +int tonum( char c ){ + return c-'0'; +} + +void out52( char c ){ + write(1, "\x1b", 1 ); + write(1,&c, 1 ); +} + +void out52n( char c, char n ){ + out52( c ); + write(1,&n, 1 ); +} + +void out52nn( char c, char n, char m){ + out52( c ); + write(1,&n,1); + write(1,&m,1); +} + + +char cconv( char c ){ + return colors[c]; +} + + +/* check for matching fore/background colors w/ intensity bit + we can't do intensity - so text disappears */ +void ckint(){ + if( (fc == bc) && inten ){ + fc = fc + 1 & 0x7 ; + out52n( 'b', fc ); + } +} + +/* Send a char to the console, processing for ANSI/TELNET chars */ +void charout( char c ){ + static char mode=0; + int i; + + switch( mode ){ + /* normal mode */ + case 0: + if( c == 255 ){ + mode=3; + return; + } + if( c != ESC ) write( 1, &c ,1 ); + else{ + mode=1; + } + return; + /* ESC detected */ + case 1: + if( c=='[' ){ + mode=2; + return; + } + return; + /* Multi-byte detected */ + case 2: + if( isnum(c) ){ + para[no]=para[no]*10+tonum(c); + return; + } + if( c == ';' ){ + no++; + return; + } + no++; + goto final; + /* Telnet IAC detected */ + case 3: + switch( c ){ + case 255: + write(1,&c,1); + mode=0; + return; + + case 251: + mode=5; + return; + case 252: + mode=6; + return; + case 253: + case 254: + if(hex) printf("<%x>",c); + mode=4; + return; + } + mode=0; + return; + /* send Telnet's WILLNOTs to server */ + case 4: + if( hex )printf("<%x>\n", c ); + write( fddw, "\xff\xfc",2); + write( fddw, &c, 1 ); + mode = 0; + return; + /* received a WILL */ + case 5: + if( c == 1 ){ + lecho = 0; + //write(fddw,"\xff\xfd",2); + //write(fddw, &c, 1 ); + mode = 0; + return; + } + write( fddw,"\xff\xfe",2); + write( fddw, &c, 1); + mode = 0; + return; + /* received a WONT */ + case 6: + if( hex ) printf("opt<%x>\n", c ); + if( c == 1 ) lecho = -1; + else{ + write( fddw, "\xff\xfe", 2 ); + write( fddw, &c, 1 ); + } + mode = 0; + return; + + } + /* and the trailing command */ + final: + // printf("DEBUG: %d %d %d %c\n", para[0], para[1], para[2], c); + switch( c ){ + case 'J': + if( para[0] == 2 ){ + out52( 'H' ); + out52( 'J' ); + break; + } + if( para[1] == 0 ){ + out52( 'J' ); + break; + } + case 'H': + case 'f': + if( para[0]==0 && para[1]==0 ){ + out52( 'H' ); + break; + } + if( para[0]==0 ) para[0]=1; + if( para[1]==0 ) para[1]=1; + out52nn( 'Y', para[0]+' ', para[1]+' '); + break; + case 'K': + if( para[0] == 0 ){ + out52( 'K'); + break; + } + case 'm': + for( i=0; i=30 && para[i]<=37 ){ + fc=cconv(para[i]-30); + out52n( 'b', fc ); + ckint(); + } + if( para[i]>=40 && para[i]<=47 ){ + bc=cconv(para[i]-40); + out52n( 'c', bc ); + ckint(); + } + if( para[i]==0 ){ + out52n( 'b', '4' ); + out52n( 'c', '0' ); + inten=0; + } + if( para[i]==1 ){ + inten=1; + ckint(); + } + } + break; + case 'C': + case 'D': + case 'A': + case 'B': + if( para[0]==0 ) para[0]=1; + for( i=0; ih_addr_list[0], 4 ); + + fddw = socket(AF_INET, SOCK_STREAM, 0); + if (fddw < 0) { + perror("af_inet sock_stream 0"); + exit(1); + } + + if (connect(fddw, (struct sockaddr *) &addr, sizeof(addr)) < 0) { + perror("connect"); + exit(1); + } + fcntl( fddw, F_SETFL, O_NDELAY ); +} + +int main( int argc, char *argv[]){ + int len; + + if( argc < 2 ){ + write(2, "telnet: server [port]\n", 22 ); + exit(1); + } + + tcgetattr( 0, &lprior ); + + my_open( argc, argv ); + + flags = fcntl(0, F_GETFL, 0); + fcntl(0, F_SETFL, flags | O_NDELAY ); + + + tcgetattr( 0, &lnew ); + lnew.c_lflag &= ~ICANON; + lnew.c_lflag &= ~ECHO; + tcsetattr( 0, TCSANOW, &lnew ); + + printf("Use Cntl-A ? for help.\n"); + + while(1){ + char *pos=ibuf; + len=myread(); + while( len > 0 ){ + int ret = write( fddw, pos, len ); + if( ret < 0 ){ + if( errno == EAGAIN ){ + ret=0; + } + else + quit(); + } + len=len-ret; + pos+=ret; + } + len=read( fddw, ibuf, 127 ); + if( ! len ) + quit(); + if( len < 0 ){ + if( errno != EAGAIN ){ + quit(); + } + } + pos = ibuf; + while( len > 0){ + int ret = mywrite( pos, len ); + if( ret < 0 ){ + if( errno == EWOULDBLOCK ){ + ret=0; + } + else quit(); + } + len=len-ret; + pos+=ret; + } + } +} + + + diff --git a/Applications/netd/timer.c b/Applications/netd/timer.c new file mode 100644 index 00000000..74eedf61 --- /dev/null +++ b/Applications/netd/timer.c @@ -0,0 +1,127 @@ +/** + * \addtogroup timer + * @{ + */ + +/** + * \file + * Timer library implementation. + * \author + * Adam Dunkels + */ + +/* + * Copyright (c) 2004, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack + * + * Author: Adam Dunkels + * + * $Id: timer.c,v 1.2 2006/06/12 08:00:30 adam Exp $ + */ + +#include "clock.h" +#include "timer.h" + +/*---------------------------------------------------------------------------*/ +/** + * Set a timer. + * + * This function is used to set a timer for a time sometime in the + * future. The function timer_expired() will evaluate to true after + * the timer has expired. + * + * \param t A pointer to the timer + * \param interval The interval before the timer expires. + * + */ +void +timer_set(struct timer *t, clock_time_t interval) +{ + t->interval = interval; + t->start = clock_time(); +} +/*---------------------------------------------------------------------------*/ +/** + * Reset the timer with the same interval. + * + * This function resets the timer with the same interval that was + * given to the timer_set() function. The start point of the interval + * is the exact time that the timer last expired. Therefore, this + * function will cause the timer to be stable over time, unlike the + * timer_rester() function. + * + * \param t A pointer to the timer. + * + * \sa timer_restart() + */ +void +timer_reset(struct timer *t) +{ + t->start += t->interval; +} +/*---------------------------------------------------------------------------*/ +/** + * Restart the timer from the current point in time + * + * This function restarts a timer with the same interval that was + * given to the timer_set() function. The timer will start at the + * current time. + * + * \note A periodic timer will drift if this function is used to reset + * it. For preioric timers, use the timer_reset() function instead. + * + * \param t A pointer to the timer. + * + * \sa timer_reset() + */ +void +timer_restart(struct timer *t) +{ + t->start = clock_time(); +} +/*---------------------------------------------------------------------------*/ +/** + * Check if a timer has expired. + * + * This function tests if a timer has expired and returns true or + * false depending on its status. + * + * \param t A pointer to the timer + * + * \return Non-zero if the timer has expired, zero otherwise. + * + */ +int +timer_expired(struct timer *t) +{ + return (clock_time_t)(clock_time() - t->start) >= (clock_time_t)t->interval; +} +/*---------------------------------------------------------------------------*/ + +/** @} */ diff --git a/Applications/netd/timer.h b/Applications/netd/timer.h new file mode 100644 index 00000000..057bea49 --- /dev/null +++ b/Applications/netd/timer.h @@ -0,0 +1,86 @@ +/** + * \defgroup timer Timer library + * + * The timer library provides functions for setting, resetting and + * restarting timers, and for checking if a timer has expired. An + * application must "manually" check if its timers have expired; this + * is not done automatically. + * + * A timer is declared as a \c struct \c timer and all access to the + * timer is made by a pointer to the declared timer. + * + * \note The timer library uses the \ref clock "Clock library" to + * measure time. Intervals should be specified in the format used by + * the clock library. + * + * @{ + */ + + +/** + * \file + * Timer library header file. + * \author + * Adam Dunkels + */ + +/* + * Copyright (c) 2004, Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack + * + * Author: Adam Dunkels + * + * $Id: timer.h,v 1.3 2006/06/11 21:46:39 adam Exp $ + */ +#ifndef __TIMER_H__ +#define __TIMER_H__ + +#include "clock.h" + +/** + * A timer. + * + * This structure is used for declaring a timer. The timer must be set + * with timer_set() before it can be used. + * + * \hideinitializer + */ +struct timer { + clock_time_t start; + clock_time_t interval; +}; + +void timer_set(struct timer *t, clock_time_t interval); +void timer_reset(struct timer *t); +void timer_restart(struct timer *t); +int timer_expired(struct timer *t); + +#endif /* __TIMER_H__ */ + +/** @} */ diff --git a/Applications/netd/uip.c b/Applications/netd/uip.c new file mode 100644 index 00000000..50de8054 --- /dev/null +++ b/Applications/netd/uip.c @@ -0,0 +1,1973 @@ +/* + * Copyright (c) 2001-2003, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * + */ + +/** + * \file + * The uIP TCP/IP stack code. + * \author Adam Dunkels + */ + +/** + * \addtogroup uip + * @{ + */ + +#define DEBUG_PRINTF(...) /*printf(__VA_ARGS__)*/ + +/* + * uIP is a small implementation of the IP, UDP and TCP protocols (as + * well as some basic ICMP stuff). The implementation couples the IP, + * UDP, TCP and the application layers very tightly. To keep the size + * of the compiled code down, this code frequently uses the goto + * statement. While it would be possible to break the uip_process() + * function into many smaller functions, this would increase the code + * size because of the overhead of parameter passing and the fact that + * the optimier would not be as efficient. + * + * The principle is that we have a small buffer, called the uip_buf, + * in which the device driver puts an incoming packet. The TCP/IP + * stack parses the headers in the packet, and calls the + * application. If the remote host has sent data to the application, + * this data is present in the uip_buf and the application read the + * data from there. It is up to the application to put this data into + * a byte stream if needed. The application will not be fed with data + * that is out of sequence. + * + * If the application whishes to send data to the peer, it should put + * its data into the uip_buf. The uip_appdata pointer points to the + * first available byte. The TCP/IP stack will calculate the + * checksums, and fill in the necessary header fields and finally send + * the packet back to the peer. +*/ + +#include "uip.h" +#include "uipopt.h" +#include "uip_arp.h" +#include "uip_arch.h" + +// #include "../ipv4/uip-neighbor.h" + +#include +// #include "../ip/cc.h" + +/*---------------------------------------------------------------------------*/ +/* Variable definitions. */ + + +/* The IP address of this host. If it is defined to be fixed (by + setting UIP_FIXEDADDR to 1 in uipopt.h), the address is set + here. Otherwise, the address */ +#if UIP_FIXEDADDR > 0 +const uip_ipaddr_t uip_hostaddr = + { UIP_IPADDR0, UIP_IPADDR1, UIP_IPADDR2, UIP_IPADDR3 }; +const uip_ipaddr_t uip_draddr = + { UIP_DRIPADDR0, UIP_DRIPADDR1, UIP_DRIPADDR2, UIP_DRIPADDR3 }; +const uip_ipaddr_t uip_netmask = + { UIP_NETMASK0, UIP_NETMASK1, UIP_NETMASK2, UIP_NETMASK3 }; +#else +uip_ipaddr_t uip_hostaddr, uip_draddr, uip_netmask; +#endif /* UIP_FIXEDADDR */ + +const uip_ipaddr_t uip_broadcast_addr = +#if NETSTACK_CONF_WITH_IPV6 + { { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } }; +#else /* NETSTACK_CONF_WITH_IPV6 */ + { { 0xff, 0xff, 0xff, 0xff } }; +#endif /* NETSTACK_CONF_WITH_IPV6 */ +const uip_ipaddr_t uip_all_zeroes_addr = { { 0x0, /* rest is 0 */ } }; + +#if UIP_FIXEDETHADDR +const uip_lladdr_t uip_lladdr = {{UIP_ETHADDR0, + UIP_ETHADDR1, + UIP_ETHADDR2, + UIP_ETHADDR3, + UIP_ETHADDR4, + UIP_ETHADDR5}}; +#else +uip_lladdr_t uip_lladdr = {{0,0,0,0,0,0}}; +#endif + +/* The packet buffer that contains incoming packets. */ +uip_buf_t uip_aligned_buf; + +void *uip_appdata; /* The uip_appdata pointer points to + application data. */ +void *uip_sappdata; /* The uip_appdata pointer points to + the application data which is to + be sent. */ +#if UIP_URGDATA > 0 +void *uip_urgdata; /* The uip_urgdata pointer points to + urgent data (out-of-band data), if + present. */ +uint16_t uip_urglen, uip_surglen; +#endif /* UIP_URGDATA > 0 */ + +uint16_t uip_len, uip_slen; + /* The uip_len is either 8 or 16 bits, + depending on the maximum packet + size. */ + +uint8_t uip_flags; /* The uip_flags variable is used for + communication between the TCP/IP stack + and the application program. */ +struct uip_conn *uip_conn; /* uip_conn always points to the current + connection. */ + +struct uip_conn uip_conns[UIP_CONNS]; + /* The uip_conns array holds all TCP + connections. */ +uint16_t uip_listenports[UIP_LISTENPORTS]; + /* The uip_listenports list all currently + listning ports. */ +#if UIP_UDP +struct uip_udp_conn *uip_udp_conn; +struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS]; +#endif /* UIP_UDP */ + +static uint16_t ipid; /* Ths ipid variable is an increasing + number that is used for the IP ID + field. */ + +void uip_setipid(uint16_t id) { ipid = id; } + +static uint8_t iss[4]; /* The iss variable is used for the TCP + initial sequence number. */ + +#if UIP_ACTIVE_OPEN || UIP_UDP +static uint16_t lastport; /* Keeps track of the last port used for + a new connection. */ +#endif /* UIP_ACTIVE_OPEN || UIP_UDP */ + +/* Temporary variables. */ +uint8_t uip_acc32[4]; +static uint8_t c, opt; +static uint16_t tmp16; + +/* Structures and definitions. */ +#define TCP_FIN 0x01 +#define TCP_SYN 0x02 +#define TCP_RST 0x04 +#define TCP_PSH 0x08 +#define TCP_ACK 0x10 +#define TCP_URG 0x20 +#define TCP_CTL 0x3f + +#define TCP_OPT_END 0 /* End of TCP options list */ +#define TCP_OPT_NOOP 1 /* "No-operation" TCP option */ +#define TCP_OPT_MSS 2 /* Maximum segment size TCP option */ + +#define TCP_OPT_MSS_LEN 4 /* Length of TCP MSS option. */ + +#define ICMP_ECHO_REPLY 0 +#define ICMP_ECHO 8 + +#define ICMP_DEST_UNREACHABLE 3 +#define ICMP_PORT_UNREACHABLE 3 + +#define ICMP6_ECHO_REPLY 129 +#define ICMP6_ECHO 128 +#define ICMP6_NEIGHBOR_SOLICITATION 135 +#define ICMP6_NEIGHBOR_ADVERTISEMENT 136 + +#define ICMP6_FLAG_S (1 << 6) + +#define ICMP6_OPTION_SOURCE_LINK_ADDRESS 1 +#define ICMP6_OPTION_TARGET_LINK_ADDRESS 2 + + +/* Macros. */ +#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN]) +#define FBUF ((struct uip_tcpip_hdr *)&uip_reassbuf[0]) +#define ICMPBUF ((struct uip_icmpip_hdr *)&uip_buf[UIP_LLH_LEN]) +#define UDPBUF ((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN]) + + +#if UIP_STATISTICS == 1 +struct uip_stats uip_stat; +#define UIP_STAT(s) s +#else +#define UIP_STAT(s) +#endif /* UIP_STATISTICS == 1 */ + +#if UIP_LOGGING == 1 +#include +void uip_log(char *msg); +#define UIP_LOG(m) uip_log(m) +#else +#define UIP_LOG(m) +#endif /* UIP_LOGGING == 1 */ + +#if ! UIP_ARCH_ADD32 +void +uip_add32(uint8_t *op32, uint16_t op16) +{ + uip_acc32[3] = op32[3] + (op16 & 0xff); + uip_acc32[2] = op32[2] + (op16 >> 8); + uip_acc32[1] = op32[1]; + uip_acc32[0] = op32[0]; + + if(uip_acc32[2] < (op16 >> 8)) { + ++uip_acc32[1]; + if(uip_acc32[1] == 0) { + ++uip_acc32[0]; + } + } + + + if(uip_acc32[3] < (op16 & 0xff)) { + ++uip_acc32[2]; + if(uip_acc32[2] == 0) { + ++uip_acc32[1]; + if(uip_acc32[1] == 0) { + ++uip_acc32[0]; + } + } + } +} + +#endif /* UIP_ARCH_ADD32 */ + +#if ! UIP_ARCH_CHKSUM +/*---------------------------------------------------------------------------*/ +static uint16_t +chksum(uint16_t sum, const uint8_t *data, uint16_t len) +{ + uint16_t t; + const uint8_t *dataptr; + const uint8_t *last_byte; + + dataptr = data; + last_byte = data + len - 1; + + while(dataptr < last_byte) { /* At least two more bytes */ + t = (dataptr[0] << 8) + dataptr[1]; + sum += t; + if(sum < t) { + sum++; /* carry */ + } + dataptr += 2; + } + + if(dataptr == last_byte) { + t = (dataptr[0] << 8) + 0; + sum += t; + if(sum < t) { + sum++; /* carry */ + } + } + + /* Return sum in host byte order. */ + return sum; +} +/*---------------------------------------------------------------------------*/ +uint16_t +uip_chksum(uint16_t *data, uint16_t len) +{ + return uip_htons(chksum(0, (uint8_t *)data, len)); +} +/*---------------------------------------------------------------------------*/ +#ifndef UIP_ARCH_IPCHKSUM +uint16_t +uip_ipchksum(void) +{ + uint16_t sum; + + sum = chksum(0, &uip_buf[UIP_LLH_LEN], UIP_IPH_LEN); + DEBUG_PRINTF("uip_ipchksum: sum 0x%04x\n", sum); + return (sum == 0) ? 0xffff : uip_htons(sum); +} +#endif +/*---------------------------------------------------------------------------*/ +static uint16_t +upper_layer_chksum(uint8_t proto) +{ + uint16_t upper_layer_len; + uint16_t sum; + +#if NETSTACK_CONF_WITH_IPV6 + upper_layer_len = (((uint16_t)(BUF->len[0]) << 8) + BUF->len[1]); +#else /* NETSTACK_CONF_WITH_IPV6 */ + upper_layer_len = (((uint16_t)(BUF->len[0]) << 8) + BUF->len[1]) - UIP_IPH_LEN; +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + /* First sum pseudoheader. */ + + /* IP protocol and length fields. This addition cannot carry. */ + sum = upper_layer_len + proto; + /* Sum IP source and destination addresses. */ + sum = chksum(sum, (uint8_t *)&BUF->srcipaddr, 2 * sizeof(uip_ipaddr_t)); + + /* Sum TCP header and data. */ + sum = chksum(sum, &uip_buf[UIP_IPH_LEN + UIP_LLH_LEN], + upper_layer_len); + + return (sum == 0) ? 0xffff : uip_htons(sum); +} +/*---------------------------------------------------------------------------*/ +#if NETSTACK_CONF_WITH_IPV6 +uint16_t +uip_icmp6chksum(void) +{ + return upper_layer_chksum(UIP_PROTO_ICMP6); + +} +#endif /* NETSTACK_CONF_WITH_IPV6 */ +/*---------------------------------------------------------------------------*/ +uint16_t +uip_tcpchksum(void) +{ + return upper_layer_chksum(UIP_PROTO_TCP); +} +/*---------------------------------------------------------------------------*/ +#if UIP_UDP_CHECKSUMS +uint16_t +uip_udpchksum(void) +{ + return upper_layer_chksum(UIP_PROTO_UDP); +} +#endif /* UIP_UDP_CHECKSUMS */ +#endif /* UIP_ARCH_CHKSUM */ +/*---------------------------------------------------------------------------*/ +void +uip_init(void) +{ + for(c = 0; c < UIP_LISTENPORTS; ++c) { + uip_listenports[c] = 0; + } + for(c = 0; c < UIP_CONNS; ++c) { + uip_conns[c].tcpstateflags = UIP_CLOSED; + } +#if UIP_ACTIVE_OPEN || UIP_UDP + lastport = 1024; +#endif /* UIP_ACTIVE_OPEN || UIP_UDP */ + +#if UIP_UDP + for(c = 0; c < UIP_UDP_CONNS; ++c) { + uip_udp_conns[c].lport = 0; + } +#endif /* UIP_UDP */ + + + /* IPv4 initialization. */ +#if UIP_FIXEDADDR == 0 + /* uip_hostaddr[0] = uip_hostaddr[1] = 0;*/ +#endif /* UIP_FIXEDADDR */ + +} +/*---------------------------------------------------------------------------*/ +#if UIP_ACTIVE_OPEN +struct uip_conn * +uip_connect(const uip_ipaddr_t *ripaddr, uint16_t rport) +{ + register struct uip_conn *conn, *cconn; + + /* Find an unused local port. */ + again: + ++lastport; + + if(lastport >= 32000) { + lastport = 4096; + } + + /* Check if this port is already in use, and if so try to find + another one. */ + for(c = 0; c < UIP_CONNS; ++c) { + conn = &uip_conns[c]; + if(conn->tcpstateflags != UIP_CLOSED && + conn->lport == uip_htons(lastport)) { + goto again; + } + } + + conn = 0; + for(c = 0; c < UIP_CONNS; ++c) { + cconn = &uip_conns[c]; + if(cconn->tcpstateflags == UIP_CLOSED) { + conn = cconn; + break; + } + if(cconn->tcpstateflags == UIP_TIME_WAIT) { + if(conn == 0 || + cconn->timer > conn->timer) { + conn = cconn; + } + } + } + + if(conn == 0) { + return 0; + } + + conn->tcpstateflags = UIP_SYN_SENT; + + conn->snd_nxt[0] = iss[0]; + conn->snd_nxt[1] = iss[1]; + conn->snd_nxt[2] = iss[2]; + conn->snd_nxt[3] = iss[3]; + + conn->rcv_nxt[0] = 0; + conn->rcv_nxt[1] = 0; + conn->rcv_nxt[2] = 0; + conn->rcv_nxt[3] = 0; + + conn->initialmss = conn->mss = UIP_TCP_MSS; + + conn->len = 1; /* TCP length of the SYN is one. */ + conn->nrtx = 0; + conn->timer = 1; /* Send the SYN next time around. */ + conn->rto = UIP_RTO; + conn->sa = 0; + conn->sv = 16; /* Initial value of the RTT variance. */ + conn->lport = uip_htons(lastport); + conn->rport = rport; + uip_ipaddr_copy(&conn->ripaddr, ripaddr); + + return conn; +} +#endif /* UIP_ACTIVE_OPEN */ +/*---------------------------------------------------------------------------*/ +#if UIP_UDP +struct uip_udp_conn * +uip_udp_new(const uip_ipaddr_t *ripaddr, uint16_t rport) +{ + register struct uip_udp_conn *conn; + + /* Find an unused local port. */ + again: + ++lastport; + + if(lastport >= 32000) { + lastport = 4096; + } + + for(c = 0; c < UIP_UDP_CONNS; ++c) { + if(uip_udp_conns[c].lport == uip_htons(lastport)) { + goto again; + } + } + + + conn = 0; + for(c = 0; c < UIP_UDP_CONNS; ++c) { + if(uip_udp_conns[c].lport == 0) { + conn = &uip_udp_conns[c]; + break; + } + } + + if(conn == 0) { + return 0; + } + + conn->lport = UIP_HTONS(lastport); + conn->rport = rport; + if(ripaddr == NULL) { + memset(&conn->ripaddr, 0, sizeof(uip_ipaddr_t)); + } else { + uip_ipaddr_copy(&conn->ripaddr, ripaddr); + } + conn->ttl = UIP_TTL; + + return conn; +} +#endif /* UIP_UDP */ +/*---------------------------------------------------------------------------*/ +void +uip_unlisten(uint16_t port) +{ + for(c = 0; c < UIP_LISTENPORTS; ++c) { + if(uip_listenports[c] == port) { + uip_listenports[c] = 0; + return; + } + } +} +/*---------------------------------------------------------------------------*/ +void +uip_listen(uint16_t port) +{ + for(c = 0; c < UIP_LISTENPORTS; ++c) { + if(uip_listenports[c] == 0) { + uip_listenports[c] = port; + return; + } + } +} +/*---------------------------------------------------------------------------*/ +/* XXX: IP fragment reassembly: not well-tested. */ + +#if UIP_REASSEMBLY && !NETSTACK_CONF_WITH_IPV6 +#define UIP_REASS_BUFSIZE (UIP_BUFSIZE - UIP_LLH_LEN) +static uint8_t uip_reassbuf[UIP_REASS_BUFSIZE]; +static uint8_t uip_reassbitmap[UIP_REASS_BUFSIZE / (8 * 8)]; +static const uint8_t bitmap_bits[8] = {0xff, 0x7f, 0x3f, 0x1f, + 0x0f, 0x07, 0x03, 0x01}; +static uint16_t uip_reasslen; +static uint8_t uip_reassflags; +#define UIP_REASS_FLAG_LASTFRAG 0x01 +static uint8_t uip_reasstmr; + +#define IP_MF 0x20 + +static uint8_t +uip_reass(void) +{ + uint16_t offset, len; + uint16_t i; + + /* If ip_reasstmr is zero, no packet is present in the buffer, so we + write the IP header of the fragment into the reassembly + buffer. The timer is updated with the maximum age. */ + if(uip_reasstmr == 0) { + memcpy(uip_reassbuf, &BUF->vhl, UIP_IPH_LEN); + uip_reasstmr = UIP_REASS_MAXAGE; + uip_reassflags = 0; + /* Clear the bitmap. */ + memset(uip_reassbitmap, 0, sizeof(uip_reassbitmap)); + } + + /* Check if the incoming fragment matches the one currently present + in the reasembly buffer. If so, we proceed with copying the + fragment into the buffer. */ + if(BUF->srcipaddr[0] == FBUF->srcipaddr[0] && + BUF->srcipaddr[1] == FBUF->srcipaddr[1] && + BUF->destipaddr[0] == FBUF->destipaddr[0] && + BUF->destipaddr[1] == FBUF->destipaddr[1] && + BUF->ipid[0] == FBUF->ipid[0] && + BUF->ipid[1] == FBUF->ipid[1]) { + + len = (BUF->len[0] << 8) + BUF->len[1] - (BUF->vhl & 0x0f) * 4; + offset = (((BUF->ipoffset[0] & 0x3f) << 8) + BUF->ipoffset[1]) * 8; + + /* If the offset or the offset + fragment length overflows the + reassembly buffer, we discard the entire packet. */ + if(offset > UIP_REASS_BUFSIZE || + offset + len > UIP_REASS_BUFSIZE) { + uip_reasstmr = 0; + goto nullreturn; + } + + /* Copy the fragment into the reassembly buffer, at the right + offset. */ + memcpy(&uip_reassbuf[UIP_IPH_LEN + offset], + (char *)BUF + (int)((BUF->vhl & 0x0f) * 4), + len); + + /* Update the bitmap. */ + if(offset / (8 * 8) == (offset + len) / (8 * 8)) { + /* If the two endpoints are in the same byte, we only update + that byte. */ + + uip_reassbitmap[offset / (8 * 8)] |= + bitmap_bits[(offset / 8 ) & 7] & + ~bitmap_bits[((offset + len) / 8 ) & 7]; + } else { + /* If the two endpoints are in different bytes, we update the + bytes in the endpoints and fill the stuff inbetween with + 0xff. */ + uip_reassbitmap[offset / (8 * 8)] |= + bitmap_bits[(offset / 8 ) & 7]; + for(i = 1 + offset / (8 * 8); i < (offset + len) / (8 * 8); ++i) { + uip_reassbitmap[i] = 0xff; + } + uip_reassbitmap[(offset + len) / (8 * 8)] |= + ~bitmap_bits[((offset + len) / 8 ) & 7]; + } + + /* If this fragment has the More Fragments flag set to zero, we + know that this is the last fragment, so we can calculate the + size of the entire packet. We also set the + IP_REASS_FLAG_LASTFRAG flag to indicate that we have received + the final fragment. */ + + if((BUF->ipoffset[0] & IP_MF) == 0) { + uip_reassflags |= UIP_REASS_FLAG_LASTFRAG; + uip_reasslen = offset + len; + } + + /* Finally, we check if we have a full packet in the buffer. We do + this by checking if we have the last fragment and if all bits + in the bitmap are set. */ + if(uip_reassflags & UIP_REASS_FLAG_LASTFRAG) { + /* Check all bytes up to and including all but the last byte in + the bitmap. */ + for(i = 0; i < uip_reasslen / (8 * 8) - 1; ++i) { + if(uip_reassbitmap[i] != 0xff) { + goto nullreturn; + } + } + /* Check the last byte in the bitmap. It should contain just the + right amount of bits. */ + if(uip_reassbitmap[uip_reasslen / (8 * 8)] != + (uint8_t)~bitmap_bits[uip_reasslen / 8 & 7]) { + goto nullreturn; + } + + /* If we have come this far, we have a full packet in the + buffer, so we allocate a pbuf and copy the packet into it. We + also reset the timer. */ + uip_reasstmr = 0; + memcpy(BUF, FBUF, uip_reasslen); + + /* Pretend to be a "normal" (i.e., not fragmented) IP packet + from now on. */ + BUF->ipoffset[0] = BUF->ipoffset[1] = 0; + BUF->len[0] = uip_reasslen >> 8; + BUF->len[1] = uip_reasslen & 0xff; + BUF->ipchksum = 0; + BUF->ipchksum = ~(uip_ipchksum()); + + return uip_reasslen; + } + } + + nullreturn: + return 0; +} +#endif /* UIP_REASSEMBLY */ +/*---------------------------------------------------------------------------*/ +static void +uip_add_rcv_nxt(uint16_t n) +{ + uip_add32(uip_conn->rcv_nxt, n); + uip_conn->rcv_nxt[0] = uip_acc32[0]; + uip_conn->rcv_nxt[1] = uip_acc32[1]; + uip_conn->rcv_nxt[2] = uip_acc32[2]; + uip_conn->rcv_nxt[3] = uip_acc32[3]; +} +/*---------------------------------------------------------------------------*/ +void +uip_process(uint8_t flag) +{ + register struct uip_conn *uip_connr = uip_conn; + +#if UIP_UDP + if(flag == UIP_UDP_SEND_CONN) { + goto udp_send; + } +#endif /* UIP_UDP */ + + uip_sappdata = uip_appdata = &uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN]; + + /* Check if we were invoked because of a poll request for a + particular connection. */ + if(flag == UIP_POLL_REQUEST) { + if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED && + !uip_outstanding(uip_connr)) { + uip_flags = UIP_POLL; + UIP_APPCALL(); + goto appsend; +#if UIP_ACTIVE_OPEN && UIP_TCP + } else if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_SENT) { + /* In the SYN_SENT state, we retransmit out SYN. */ + BUF->flags = 0; + goto tcp_send_syn; +#endif /* UIP_ACTIVE_OPEN */ + } + goto drop; + + /* Check if we were invoked because of the periodic timer firing. */ + } else if(flag == UIP_TIMER) { +#if UIP_REASSEMBLY + if(uip_reasstmr != 0) { + --uip_reasstmr; + } +#endif /* UIP_REASSEMBLY */ + /* Increase the initial sequence number. */ + if(++iss[3] == 0) { + if(++iss[2] == 0) { + if(++iss[1] == 0) { + ++iss[0]; + } + } + } + + /* Reset the length variables. */ + uip_clear_buf(); + uip_slen = 0; + +#if UIP_TCP + /* Check if the connection is in a state in which we simply wait + for the connection to time out. If so, we increase the + connection's timer and remove the connection if it times + out. */ + if(uip_connr->tcpstateflags == UIP_TIME_WAIT || + uip_connr->tcpstateflags == UIP_FIN_WAIT_2) { + ++(uip_connr->timer); + if(uip_connr->timer == UIP_TIME_WAIT_TIMEOUT) { + uip_connr->tcpstateflags = UIP_CLOSED; + } + } else if(uip_connr->tcpstateflags != UIP_CLOSED) { + /* If the connection has outstanding data, we increase the + connection's timer and see if it has reached the RTO value + in which case we retransmit. */ + + if(uip_outstanding(uip_connr)) { + if(uip_connr->timer-- == 0) { + if(uip_connr->nrtx == UIP_MAXRTX || + ((uip_connr->tcpstateflags == UIP_SYN_SENT || + uip_connr->tcpstateflags == UIP_SYN_RCVD) && + uip_connr->nrtx == UIP_MAXSYNRTX)) { + uip_connr->tcpstateflags = UIP_CLOSED; + + /* We call UIP_APPCALL() with uip_flags set to + UIP_TIMEDOUT to inform the application that the + connection has timed out. */ + uip_flags = UIP_TIMEDOUT; + UIP_APPCALL(); + + /* We also send a reset packet to the remote host. */ + BUF->flags = TCP_RST | TCP_ACK; + goto tcp_send_nodata; + } + + /* Exponential backoff. */ + uip_connr->timer = UIP_RTO << (uip_connr->nrtx > 4? + 4: + uip_connr->nrtx); + ++(uip_connr->nrtx); + + /* Ok, so we need to retransmit. We do this differently + depending on which state we are in. In ESTABLISHED, we + call upon the application so that it may prepare the + data for the retransmit. In SYN_RCVD, we resend the + SYNACK that we sent earlier and in LAST_ACK we have to + retransmit our FINACK. */ + UIP_STAT(++uip_stat.tcp.rexmit); + switch(uip_connr->tcpstateflags & UIP_TS_MASK) { + case UIP_SYN_RCVD: + /* In the SYN_RCVD state, we should retransmit our + SYNACK. */ + goto tcp_send_synack; + +#if UIP_ACTIVE_OPEN + case UIP_SYN_SENT: + /* In the SYN_SENT state, we retransmit out SYN. */ + BUF->flags = 0; + goto tcp_send_syn; +#endif /* UIP_ACTIVE_OPEN */ + + case UIP_ESTABLISHED: + /* In the ESTABLISHED state, we call upon the application + to do the actual retransmit after which we jump into + the code for sending out the packet (the apprexmit + label). */ + uip_flags = UIP_REXMIT; + UIP_APPCALL(); + goto apprexmit; + + case UIP_FIN_WAIT_1: + case UIP_CLOSING: + case UIP_LAST_ACK: + /* In all these states we should retransmit a FINACK. */ + goto tcp_send_finack; + + } + } + } else if((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_ESTABLISHED) { + /* If there was no need for a retransmission, we poll the + application for new data. */ + uip_flags = UIP_POLL; + UIP_APPCALL(); + goto appsend; + } + } +#endif + goto drop; + } +#if UIP_UDP + if(flag == UIP_UDP_TIMER) { + if(uip_udp_conn->lport != 0) { + uip_conn = NULL; + uip_sappdata = uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN]; + uip_len = uip_slen = 0; + uip_flags = UIP_POLL; + UIP_UDP_APPCALL(); + goto udp_send; + } else { + goto drop; + } + } +#endif + + /* This is where the input processing starts. */ + UIP_STAT(++uip_stat.ip.recv); + + /* Start of IP input header processing code. */ + +#if NETSTACK_CONF_WITH_IPV6 + /* Check validity of the IP header. */ + if((BUF->vtc & 0xf0) != 0x60) { /* IP version and header length. */ + UIP_STAT(++uip_stat.ip.drop); + UIP_STAT(++uip_stat.ip.vhlerr); + UIP_LOG("ipv6: invalid version."); + goto drop; + } +#else /* NETSTACK_CONF_WITH_IPV6 */ + /* Check validity of the IP header. */ + if(BUF->vhl != 0x45) { /* IP version and header length. */ + UIP_STAT(++uip_stat.ip.drop); + UIP_STAT(++uip_stat.ip.vhlerr); + UIP_LOG("ip: invalid version or header length."); + goto drop; + } +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + /* Check the size of the packet. If the size reported to us in + uip_len is smaller the size reported in the IP header, we assume + that the packet has been corrupted in transit. If the size of + uip_len is larger than the size reported in the IP packet header, + the packet has been padded and we set uip_len to the correct + value. */ + + if((BUF->len[0] << 8) + BUF->len[1] <= uip_len) { + uip_len = (BUF->len[0] << 8) + BUF->len[1]; +#if NETSTACK_CONF_WITH_IPV6 + uip_len += 40; /* The length reported in the IPv6 header is the + length of the payload that follows the + header. However, uIP uses the uip_len variable + for holding the size of the entire packet, + including the IP header. For IPv4 this is not a + problem as the length field in the IPv4 header + contains the length of the entire packet. But + for IPv6 we need to add the size of the IPv6 + header (40 bytes). */ +#endif /* NETSTACK_CONF_WITH_IPV6 */ + } else { + UIP_LOG("ip: packet shorter than reported in IP header."); + goto drop; + } + +#if !NETSTACK_CONF_WITH_IPV6 + /* Check the fragment flag. */ + if((BUF->ipoffset[0] & 0x3f) != 0 || + BUF->ipoffset[1] != 0) { +#if UIP_REASSEMBLY + uip_len = uip_reass(); + if(uip_len == 0) { + goto drop; + } +#else /* UIP_REASSEMBLY */ + UIP_STAT(++uip_stat.ip.drop); + UIP_STAT(++uip_stat.ip.fragerr); + UIP_LOG("ip: fragment dropped."); + goto drop; +#endif /* UIP_REASSEMBLY */ + } +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + if(uip_ipaddr_cmp(&uip_hostaddr, &uip_all_zeroes_addr)) { + /* If we are configured to use ping IP address configuration and + haven't been assigned an IP address yet, we accept all ICMP + packets. */ +#if UIP_PINGADDRCONF && !NETSTACK_CONF_WITH_IPV6 + if(BUF->proto == UIP_PROTO_ICMP) { + UIP_LOG("ip: possible ping config packet received."); + goto icmp_input; + } else { + UIP_LOG("ip: packet dropped since no address assigned."); + goto drop; + } +#endif /* UIP_PINGADDRCONF */ + + } else { + /* If IP broadcast support is configured, we check for a broadcast + UDP packet, which may be destined to us. */ +#if UIP_BROADCAST + DEBUG_PRINTF("UDP IP checksum 0x%04x\n", uip_ipchksum()); + if(BUF->proto == UIP_PROTO_UDP && + (uip_ipaddr_cmp(&BUF->destipaddr, &uip_broadcast_addr) || + (BUF->destipaddr.u8[0] & 224) == 224)) { /* XXX this is a + hack to be able + to receive UDP + multicast + packets. We check + for the bit + pattern of the + multicast + prefix. */ + goto udp_input; + } +#endif /* UIP_BROADCAST */ + + /* Check if the packet is destined for our IP address. */ +#if !NETSTACK_CONF_WITH_IPV6 + if(!uip_ipaddr_cmp(&BUF->destipaddr, &uip_hostaddr)) { + UIP_STAT(++uip_stat.ip.drop); + goto drop; + } +#else /* NETSTACK_CONF_WITH_IPV6 */ + /* For IPv6, packet reception is a little trickier as we need to + make sure that we listen to certain multicast addresses (all + hosts multicast address, and the solicited-node multicast + address) as well. However, we will cheat here and accept all + multicast packets that are sent to the ff02::/16 addresses. */ + if(!uip_ipaddr_cmp(&BUF->destipaddr, &uip_hostaddr) && + BUF->destipaddr.u16[0] != UIP_HTONS(0xff02)) { + UIP_STAT(++uip_stat.ip.drop); + goto drop; + } +#endif /* NETSTACK_CONF_WITH_IPV6 */ + } + +#if !NETSTACK_CONF_WITH_IPV6 + if(uip_ipchksum() != 0xffff) { /* Compute and check the IP header + checksum. */ + UIP_STAT(++uip_stat.ip.drop); + UIP_STAT(++uip_stat.ip.chkerr); + UIP_LOG("ip: bad checksum."); + goto drop; + } +#endif /* NETSTACK_CONF_WITH_IPV6 */ + +#if UIP_TCP + if(BUF->proto == UIP_PROTO_TCP) { /* Check for TCP packet. If so, + proceed with TCP input + processing. */ + goto tcp_input; + } +#endif + +#if UIP_UDP + if(BUF->proto == UIP_PROTO_UDP) { + goto udp_input; + } +#endif /* UIP_UDP */ + +#if !NETSTACK_CONF_WITH_IPV6 + /* ICMPv4 processing code follows. */ + if(BUF->proto != UIP_PROTO_ICMP) { /* We only allow ICMP packets from + here. */ + UIP_STAT(++uip_stat.ip.drop); + UIP_STAT(++uip_stat.ip.protoerr); + UIP_LOG("ip: neither tcp nor icmp."); + goto drop; + } + +#if UIP_PINGADDRCONF + icmp_input: +#endif /* UIP_PINGADDRCONF */ + UIP_STAT(++uip_stat.icmp.recv); + + /* ICMP echo (i.e., ping) processing. This is simple, we only change + the ICMP type from ECHO to ECHO_REPLY and adjust the ICMP + checksum before we return the packet. */ + if(ICMPBUF->type != ICMP_ECHO) { + UIP_STAT(++uip_stat.icmp.drop); + UIP_STAT(++uip_stat.icmp.typeerr); + UIP_LOG("icmp: not icmp echo."); + goto drop; + } + + /* If we are configured to use ping IP address assignment, we use + the destination IP address of this ping packet and assign it to + ourself. */ +#if UIP_PINGADDRCONF + if(uip_ipaddr_cmp(&uip_hostaddr, &uip_all_zeroes_addr)) { + uip_hostaddr = BUF->destipaddr; + } +#endif /* UIP_PINGADDRCONF */ + + ICMPBUF->type = ICMP_ECHO_REPLY; + + if(ICMPBUF->icmpchksum >= UIP_HTONS(0xffff - (ICMP_ECHO << 8))) { + ICMPBUF->icmpchksum += UIP_HTONS(ICMP_ECHO << 8) + 1; + } else { + ICMPBUF->icmpchksum += UIP_HTONS(ICMP_ECHO << 8); + } + + /* Swap IP addresses. */ + uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr); + uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr); + + UIP_STAT(++uip_stat.icmp.sent); + BUF->ttl = UIP_TTL; + goto ip_send_nolen; + + /* End of IPv4 input header processing code. */ +#else /* !NETSTACK_CONF_WITH_IPV6 */ + + /* This is IPv6 ICMPv6 processing code. */ + DEBUG_PRINTF("icmp6_input: length %d\n", uip_len); + + if(BUF->proto != UIP_PROTO_ICMP6) { /* We only allow ICMPv6 packets from + here. */ + UIP_STAT(++uip_stat.ip.drop); + UIP_STAT(++uip_stat.ip.protoerr); + UIP_LOG("ip: neither tcp nor icmp6."); + goto drop; + } + + UIP_STAT(++uip_stat.icmp.recv); + + /* If we get a neighbor solicitation for our address we should send + a neighbor advertisement message back. */ + if(ICMPBUF->type == ICMP6_NEIGHBOR_SOLICITATION) { + if(uip_ipaddr_cmp(&ICMPBUF->icmp6data, &uip_hostaddr)) { + + if(ICMPBUF->options[0] == ICMP6_OPTION_SOURCE_LINK_ADDRESS) { + /* Save the sender's address in our neighbor list. */ + uip_neighbor_add(&ICMPBUF->srcipaddr, &(ICMPBUF->options[2])); + } + + /* We should now send a neighbor advertisement back to where the + neighbor solicication came from. */ + ICMPBUF->type = ICMP6_NEIGHBOR_ADVERTISEMENT; + ICMPBUF->flags = ICMP6_FLAG_S; /* Solicited flag. */ + + ICMPBUF->reserved1 = ICMPBUF->reserved2 = ICMPBUF->reserved3 = 0; + + uip_ipaddr_copy(&ICMPBUF->destipaddr, &ICMPBUF->srcipaddr); + uip_ipaddr_copy(&ICMPBUF->srcipaddr, &uip_hostaddr); + ICMPBUF->options[0] = ICMP6_OPTION_TARGET_LINK_ADDRESS; + ICMPBUF->options[1] = 1; /* Options length, 1 = 8 bytes. */ + memcpy(&(ICMPBUF->options[2]), &uip_lladdr, sizeof(uip_lladdr)); + ICMPBUF->icmpchksum = 0; + ICMPBUF->icmpchksum = ~uip_icmp6chksum(); + + goto send; + + } + goto drop; + } else if(ICMPBUF->type == ICMP6_ECHO) { + /* ICMP echo (i.e., ping) processing. This is simple, we only + change the ICMP type from ECHO to ECHO_REPLY and update the + ICMP checksum before we return the packet. */ + + ICMPBUF->type = ICMP6_ECHO_REPLY; + + uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr); + uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr); + ICMPBUF->icmpchksum = 0; + ICMPBUF->icmpchksum = ~uip_icmp6chksum(); + + UIP_STAT(++uip_stat.icmp.sent); + goto send; + } else { + DEBUG_PRINTF("Unknown icmp6 message type %d\n", ICMPBUF->type); + UIP_STAT(++uip_stat.icmp.drop); + UIP_STAT(++uip_stat.icmp.typeerr); + UIP_LOG("icmp: unknown ICMP message."); + goto drop; + } + + /* End of IPv6 ICMP processing. */ + +#endif /* !NETSTACK_CONF_WITH_IPV6 */ + +#if UIP_UDP + /* UDP input processing. */ + udp_input: + /* UDP processing is really just a hack. We don't do anything to the + UDP/IP headers, but let the UDP application do all the hard + work. If the application sets uip_slen, it has a packet to + send. */ +#if UIP_UDP_CHECKSUMS + uip_len = uip_len - UIP_IPUDPH_LEN; + uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN]; + if(UDPBUF->udpchksum != 0 && uip_udpchksum() != 0xffff) { + UIP_STAT(++uip_stat.udp.drop); + UIP_STAT(++uip_stat.udp.chkerr); + UIP_LOG("udp: bad checksum."); + goto drop; + } +#else /* UIP_UDP_CHECKSUMS */ + uip_len = uip_len - UIP_IPUDPH_LEN; +#endif /* UIP_UDP_CHECKSUMS */ + + /* Make sure that the UDP destination port number is not zero. */ + if(UDPBUF->destport == 0) { + UIP_LOG("udp: zero port."); + goto drop; + } + + /* Demultiplex this UDP packet between the UDP "connections". */ + for(uip_udp_conn = &uip_udp_conns[0]; + uip_udp_conn < &uip_udp_conns[UIP_UDP_CONNS]; + ++uip_udp_conn) { + /* If the local UDP port is non-zero, the connection is considered + to be used. If so, the local port number is checked against the + destination port number in the received packet. If the two port + numbers match, the remote port number is checked if the + connection is bound to a remote port. Finally, if the + connection is bound to a remote IP address, the source IP + address of the packet is checked. */ + if(uip_udp_conn->lport != 0 && + UDPBUF->destport == uip_udp_conn->lport && + (uip_udp_conn->rport == 0 || + UDPBUF->srcport == uip_udp_conn->rport) && + (uip_ipaddr_cmp(&uip_udp_conn->ripaddr, &uip_all_zeroes_addr) || + uip_ipaddr_cmp(&uip_udp_conn->ripaddr, &uip_broadcast_addr) || + uip_ipaddr_cmp(&BUF->srcipaddr, &uip_udp_conn->ripaddr))) { + goto udp_found; + } + } + UIP_LOG("udp: no matching connection found"); + UIP_STAT(++uip_stat.udp.drop); +#if UIP_CONF_ICMP_DEST_UNREACH && !NETSTACK_CONF_WITH_IPV6 + /* Copy fields from packet header into payload of this ICMP packet. */ + memcpy(&(ICMPBUF->payload[0]), ICMPBUF, UIP_IPH_LEN + 8); + + /* Set the ICMP type and code. */ + ICMPBUF->type = ICMP_DEST_UNREACHABLE; + ICMPBUF->icode = ICMP_PORT_UNREACHABLE; + + /* Calculate the ICMP checksum. */ + ICMPBUF->icmpchksum = 0; + ICMPBUF->icmpchksum = ~uip_chksum((uint16_t *)&(ICMPBUF->type), 36); + + /* Set the IP destination address to be the source address of the + original packet. */ + uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr); + + /* Set our IP address as the source address. */ + uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr); + + /* The size of the ICMP destination unreachable packet is 36 + the + size of the IP header (20) = 56. */ + uip_len = 36 + UIP_IPH_LEN; + ICMPBUF->len[0] = 0; + ICMPBUF->len[1] = (uint8_t)uip_len; + ICMPBUF->ttl = UIP_TTL; + ICMPBUF->proto = UIP_PROTO_ICMP; + + goto ip_send_nolen; +#else /* UIP_CONF_ICMP_DEST_UNREACH */ + goto drop; +#endif /* UIP_CONF_ICMP_DEST_UNREACH */ + + udp_found: + UIP_STAT(++uip_stat.udp.recv); + uip_conn = NULL; + uip_flags = UIP_NEWDATA; + uip_sappdata = uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN]; + uip_slen = 0; + UIP_UDP_APPCALL(); + + udp_send: + if(uip_slen == 0) { + goto drop; + } + uip_len = uip_slen + UIP_IPUDPH_LEN; + +#if NETSTACK_CONF_WITH_IPV6 + /* For IPv6, the IP length field does not include the IPv6 IP header + length. */ + BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8); + BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff); +#else /* NETSTACK_CONF_WITH_IPV6 */ + BUF->len[0] = (uip_len >> 8); + BUF->len[1] = (uip_len & 0xff); +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + BUF->ttl = uip_udp_conn->ttl; + BUF->proto = UIP_PROTO_UDP; + + UDPBUF->udplen = UIP_HTONS(uip_slen + UIP_UDPH_LEN); + UDPBUF->udpchksum = 0; + + BUF->srcport = uip_udp_conn->lport; + BUF->destport = uip_udp_conn->rport; + + uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr); + uip_ipaddr_copy(&BUF->destipaddr, &uip_udp_conn->ripaddr); + + uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPTCPH_LEN]; + +#if UIP_UDP_CHECKSUMS + /* Calculate UDP checksum. */ + UDPBUF->udpchksum = ~(uip_udpchksum()); + if(UDPBUF->udpchksum == 0) { + UDPBUF->udpchksum = 0xffff; + } +#endif /* UIP_UDP_CHECKSUMS */ + + UIP_STAT(++uip_stat.udp.sent); + goto ip_send_nolen; +#endif /* UIP_UDP */ + + /* TCP input processing. */ +#if UIP_TCP + tcp_input: + UIP_STAT(++uip_stat.tcp.recv); + + /* Start of TCP input header processing code. */ + + if(uip_tcpchksum() != 0xffff) { /* Compute and check the TCP + checksum. */ + UIP_STAT(++uip_stat.tcp.drop); + UIP_STAT(++uip_stat.tcp.chkerr); + UIP_LOG("tcp: bad checksum."); + goto drop; + } + + /* Make sure that the TCP port number is not zero. */ + if(BUF->destport == 0 || BUF->srcport == 0) { + UIP_LOG("tcp: zero port."); + goto drop; + } + + /* Demultiplex this segment. */ + /* First check any active connections. */ + for(uip_connr = &uip_conns[0]; uip_connr <= &uip_conns[UIP_CONNS - 1]; + ++uip_connr) { + if(uip_connr->tcpstateflags != UIP_CLOSED && + BUF->destport == uip_connr->lport && + BUF->srcport == uip_connr->rport && + uip_ipaddr_cmp(&BUF->srcipaddr, &uip_connr->ripaddr)) { + goto found; + } + } + + /* If we didn't find an active connection that expected the packet, + either this packet is an old duplicate, or this is a SYN packet + destined for a connection in LISTEN. If the SYN flag isn't set, + it is an old packet and we send a RST. */ + if((BUF->flags & TCP_CTL) != TCP_SYN) { + goto reset; + } + + tmp16 = BUF->destport; + /* Next, check listening connections. */ + for(c = 0; c < UIP_LISTENPORTS; ++c) { + if(tmp16 == uip_listenports[c]) { + goto found_listen; + } + } + + /* No matching connection found, so we send a RST packet. */ + UIP_STAT(++uip_stat.tcp.synrst); + + reset: + /* We do not send resets in response to resets. */ + if(BUF->flags & TCP_RST) { + goto drop; + } + + UIP_STAT(++uip_stat.tcp.rst); + + BUF->flags = TCP_RST | TCP_ACK; + uip_len = UIP_IPTCPH_LEN; + BUF->tcpoffset = 5 << 4; + + /* Flip the seqno and ackno fields in the TCP header. */ + c = BUF->seqno[3]; + BUF->seqno[3] = BUF->ackno[3]; + BUF->ackno[3] = c; + + c = BUF->seqno[2]; + BUF->seqno[2] = BUF->ackno[2]; + BUF->ackno[2] = c; + + c = BUF->seqno[1]; + BUF->seqno[1] = BUF->ackno[1]; + BUF->ackno[1] = c; + + c = BUF->seqno[0]; + BUF->seqno[0] = BUF->ackno[0]; + BUF->ackno[0] = c; + + /* We also have to increase the sequence number we are + acknowledging. If the least significant byte overflowed, we need + to propagate the carry to the other bytes as well. */ + if(++BUF->ackno[3] == 0) { + if(++BUF->ackno[2] == 0) { + if(++BUF->ackno[1] == 0) { + ++BUF->ackno[0]; + } + } + } + + /* Swap port numbers. */ + tmp16 = BUF->srcport; + BUF->srcport = BUF->destport; + BUF->destport = tmp16; + + /* Swap IP addresses. */ + uip_ipaddr_copy(&BUF->destipaddr, &BUF->srcipaddr); + uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr); + + /* And send out the RST packet! */ + goto tcp_send_noconn; + + /* This label will be jumped to if we matched the incoming packet + with a connection in LISTEN. In that case, we should create a new + connection and send a SYNACK in return. */ + found_listen: + /* First we check if there are any connections avaliable. Unused + connections are kept in the same table as used connections, but + unused ones have the tcpstate set to CLOSED. Also, connections in + TIME_WAIT are kept track of and we'll use the oldest one if no + CLOSED connections are found. Thanks to Eddie C. Dost for a very + nice algorithm for the TIME_WAIT search. */ + uip_connr = 0; + for(c = 0; c < UIP_CONNS; ++c) { + if(uip_conns[c].tcpstateflags == UIP_CLOSED) { + uip_connr = &uip_conns[c]; + break; + } + if(uip_conns[c].tcpstateflags == UIP_TIME_WAIT) { + if(uip_connr == 0 || + uip_conns[c].timer > uip_connr->timer) { + uip_connr = &uip_conns[c]; + } + } + } + + if(uip_connr == 0) { + /* All connections are used already, we drop packet and hope that + the remote end will retransmit the packet at a time when we + have more spare connections. */ + UIP_STAT(++uip_stat.tcp.syndrop); + UIP_LOG("tcp: found no unused connections."); + goto drop; + } + uip_conn = uip_connr; + + /* Fill in the necessary fields for the new connection. */ + uip_connr->rto = uip_connr->timer = UIP_RTO; + uip_connr->sa = 0; + uip_connr->sv = 4; + uip_connr->nrtx = 0; + uip_connr->lport = BUF->destport; + uip_connr->rport = BUF->srcport; + uip_ipaddr_copy(&uip_connr->ripaddr, &BUF->srcipaddr); + uip_connr->tcpstateflags = UIP_SYN_RCVD; + + uip_connr->snd_nxt[0] = iss[0]; + uip_connr->snd_nxt[1] = iss[1]; + uip_connr->snd_nxt[2] = iss[2]; + uip_connr->snd_nxt[3] = iss[3]; + uip_connr->len = 1; + + /* rcv_nxt should be the seqno from the incoming packet + 1. */ + uip_connr->rcv_nxt[0] = BUF->seqno[0]; + uip_connr->rcv_nxt[1] = BUF->seqno[1]; + uip_connr->rcv_nxt[2] = BUF->seqno[2]; + uip_connr->rcv_nxt[3] = BUF->seqno[3]; + uip_add_rcv_nxt(1); + + /* Parse the TCP MSS option, if present. */ + if((BUF->tcpoffset & 0xf0) > 0x50) { + for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) { + opt = uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + c]; + if(opt == TCP_OPT_END) { + /* End of options. */ + break; + } else if(opt == TCP_OPT_NOOP) { + ++c; + /* NOP option. */ + } else if(opt == TCP_OPT_MSS && + uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) { + /* An MSS option with the right option length. */ + tmp16 = ((uint16_t)uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) | + (uint16_t)uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + 3 + c]; + uip_connr->initialmss = uip_connr->mss = + tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16; + + /* And we are done processing options. */ + break; + } else { + /* All other options have a length field, so that we easily + can skip past them. */ + if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) { + /* If the length field is zero, the options are malformed + and we don't process them further. */ + break; + } + c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c]; + } + } + } + + /* Our response will be a SYNACK. */ +#if UIP_ACTIVE_OPEN + tcp_send_synack: + BUF->flags = TCP_ACK; + + tcp_send_syn: + BUF->flags |= TCP_SYN; +#else /* UIP_ACTIVE_OPEN */ + tcp_send_synack: + BUF->flags = TCP_SYN | TCP_ACK; +#endif /* UIP_ACTIVE_OPEN */ + + /* We send out the TCP Maximum Segment Size option with our + SYNACK. */ + BUF->optdata[0] = TCP_OPT_MSS; + BUF->optdata[1] = TCP_OPT_MSS_LEN; + BUF->optdata[2] = (UIP_TCP_MSS) / 256; + BUF->optdata[3] = (UIP_TCP_MSS) & 255; + uip_len = UIP_IPTCPH_LEN + TCP_OPT_MSS_LEN; + BUF->tcpoffset = ((UIP_TCPH_LEN + TCP_OPT_MSS_LEN) / 4) << 4; + goto tcp_send; + + /* This label will be jumped to if we found an active connection. */ + found: + uip_conn = uip_connr; + uip_flags = 0; + /* We do a very naive form of TCP reset processing; we just accept + any RST and kill our connection. We should in fact check if the + sequence number of this reset is within our advertised window + before we accept the reset. */ + if(BUF->flags & TCP_RST) { + uip_connr->tcpstateflags = UIP_CLOSED; + UIP_LOG("tcp: got reset, aborting connection."); + uip_flags = UIP_ABORT; + UIP_APPCALL(); + goto drop; + } + /* Calculate the length of the data, if the application has sent + any data to us. */ + c = (BUF->tcpoffset >> 4) << 2; + /* uip_len will contain the length of the actual TCP data. This is + calculated by subtracing the length of the TCP header (in + c) and the length of the IP header (20 bytes). */ + uip_len = uip_len - c - UIP_IPH_LEN; + + /* First, check if the sequence number of the incoming packet is + what we're expecting next. If not, we send out an ACK with the + correct numbers in, unless we are in the SYN_RCVD state and + receive a SYN, in which case we should retransmit our SYNACK + (which is done futher down). */ + if(!((((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_SENT) && + ((BUF->flags & TCP_CTL) == (TCP_SYN | TCP_ACK))) || + (((uip_connr->tcpstateflags & UIP_TS_MASK) == UIP_SYN_RCVD) && + ((BUF->flags & TCP_CTL) == TCP_SYN)))) { + if((uip_len > 0 || ((BUF->flags & (TCP_SYN | TCP_FIN)) != 0)) && + (BUF->seqno[0] != uip_connr->rcv_nxt[0] || + BUF->seqno[1] != uip_connr->rcv_nxt[1] || + BUF->seqno[2] != uip_connr->rcv_nxt[2] || + BUF->seqno[3] != uip_connr->rcv_nxt[3])) { + goto tcp_send_ack; + } + } + + /* Next, check if the incoming segment acknowledges any outstanding + data. If so, we update the sequence number, reset the length of + the outstanding data, calculate RTT estimations, and reset the + retransmission timer. */ + if((BUF->flags & TCP_ACK) && uip_outstanding(uip_connr)) { + uip_add32(uip_connr->snd_nxt, uip_connr->len); + + if(BUF->ackno[0] == uip_acc32[0] && + BUF->ackno[1] == uip_acc32[1] && + BUF->ackno[2] == uip_acc32[2] && + BUF->ackno[3] == uip_acc32[3]) { + /* Update sequence number. */ + uip_connr->snd_nxt[0] = uip_acc32[0]; + uip_connr->snd_nxt[1] = uip_acc32[1]; + uip_connr->snd_nxt[2] = uip_acc32[2]; + uip_connr->snd_nxt[3] = uip_acc32[3]; + + /* Do RTT estimation, unless we have done retransmissions. */ + if(uip_connr->nrtx == 0) { + signed char m; + m = uip_connr->rto - uip_connr->timer; + /* This is taken directly from VJs original code in his paper */ + m = m - (uip_connr->sa >> 3); + uip_connr->sa += m; + if(m < 0) { + m = -m; + } + m = m - (uip_connr->sv >> 2); + uip_connr->sv += m; + uip_connr->rto = (uip_connr->sa >> 3) + uip_connr->sv; + + } + /* Set the acknowledged flag. */ + uip_flags = UIP_ACKDATA; + /* Reset the retransmission timer. */ + uip_connr->timer = uip_connr->rto; + + /* Reset length of outstanding data. */ + uip_connr->len = 0; + } + + } + + /* Do different things depending on in what state the connection is. */ + switch(uip_connr->tcpstateflags & UIP_TS_MASK) { + /* CLOSED and LISTEN are not handled here. CLOSE_WAIT is not + implemented, since we force the application to close when the + peer sends a FIN (hence the application goes directly from + ESTABLISHED to LAST_ACK). */ + case UIP_SYN_RCVD: + /* In SYN_RCVD we have sent out a SYNACK in response to a SYN, and + we are waiting for an ACK that acknowledges the data we sent + out the last time. Therefore, we want to have the UIP_ACKDATA + flag set. If so, we enter the ESTABLISHED state. */ + if(uip_flags & UIP_ACKDATA) { + uip_connr->tcpstateflags = UIP_ESTABLISHED; + uip_flags = UIP_CONNECTED; + uip_connr->len = 0; + if(uip_len > 0) { + uip_flags |= UIP_NEWDATA; + uip_add_rcv_nxt(uip_len); + } + uip_slen = 0; + UIP_APPCALL(); + goto appsend; + } + /* We need to retransmit the SYNACK */ + if((BUF->flags & TCP_CTL) == TCP_SYN) { + goto tcp_send_synack; + } + goto drop; +#if UIP_ACTIVE_OPEN + case UIP_SYN_SENT: + /* In SYN_SENT, we wait for a SYNACK that is sent in response to + our SYN. The rcv_nxt is set to sequence number in the SYNACK + plus one, and we send an ACK. We move into the ESTABLISHED + state. */ + if((uip_flags & UIP_ACKDATA) && + (BUF->flags & TCP_CTL) == (TCP_SYN | TCP_ACK)) { + + /* Parse the TCP MSS option, if present. */ + if((BUF->tcpoffset & 0xf0) > 0x50) { + for(c = 0; c < ((BUF->tcpoffset >> 4) - 5) << 2 ;) { + opt = uip_buf[UIP_IPTCPH_LEN + UIP_LLH_LEN + c]; + if(opt == TCP_OPT_END) { + /* End of options. */ + break; + } else if(opt == TCP_OPT_NOOP) { + ++c; + /* NOP option. */ + } else if(opt == TCP_OPT_MSS && + uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == TCP_OPT_MSS_LEN) { + /* An MSS option with the right option length. */ + tmp16 = (uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 2 + c] << 8) | + uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 3 + c]; + uip_connr->initialmss = + uip_connr->mss = tmp16 > UIP_TCP_MSS? UIP_TCP_MSS: tmp16; + + /* And we are done processing options. */ + break; + } else { + /* All other options have a length field, so that we easily + can skip past them. */ + if(uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c] == 0) { + /* If the length field is zero, the options are malformed + and we don't process them further. */ + break; + } + c += uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN + 1 + c]; + } + } + } + uip_connr->tcpstateflags = UIP_ESTABLISHED; + uip_connr->rcv_nxt[0] = BUF->seqno[0]; + uip_connr->rcv_nxt[1] = BUF->seqno[1]; + uip_connr->rcv_nxt[2] = BUF->seqno[2]; + uip_connr->rcv_nxt[3] = BUF->seqno[3]; + uip_add_rcv_nxt(1); + uip_flags = UIP_CONNECTED | UIP_NEWDATA; + uip_connr->len = 0; + uip_clear_buf(); + uip_slen = 0; + UIP_APPCALL(); + goto appsend; + } + /* Inform the application that the connection failed */ + uip_flags = UIP_ABORT; + UIP_APPCALL(); + /* The connection is closed after we send the RST */ + uip_conn->tcpstateflags = UIP_CLOSED; + goto reset; +#endif /* UIP_ACTIVE_OPEN */ + + case UIP_ESTABLISHED: + /* In the ESTABLISHED state, we call upon the application to feed + data into the uip_buf. If the UIP_ACKDATA flag is set, the + application should put new data into the buffer, otherwise we are + retransmitting an old segment, and the application should put that + data into the buffer. + + If the incoming packet is a FIN, we should close the connection on + this side as well, and we send out a FIN and enter the LAST_ACK + state. We require that there is no outstanding data; otherwise the + sequence numbers will be screwed up. */ + + if(BUF->flags & TCP_FIN && !(uip_connr->tcpstateflags & UIP_STOPPED)) { + if(uip_outstanding(uip_connr)) { + goto drop; + } + uip_add_rcv_nxt(1 + uip_len); + uip_flags |= UIP_CLOSE; + if(uip_len > 0) { + uip_flags |= UIP_NEWDATA; + } + UIP_APPCALL(); + uip_connr->len = 1; + uip_connr->tcpstateflags = UIP_LAST_ACK; + uip_connr->nrtx = 0; + tcp_send_finack: + BUF->flags = TCP_FIN | TCP_ACK; + goto tcp_send_nodata; + } + + /* Check the URG flag. If this is set, the segment carries urgent + data that we must pass to the application. */ + if((BUF->flags & TCP_URG) != 0) { +#if UIP_URGDATA > 0 + uip_urglen = (BUF->urgp[0] << 8) | BUF->urgp[1]; + if(uip_urglen > uip_len) { + /* There is more urgent data in the next segment to come. */ + uip_urglen = uip_len; + } + uip_add_rcv_nxt(uip_urglen); + uip_len -= uip_urglen; + uip_urgdata = uip_appdata; + uip_appdata += uip_urglen; + } else { + uip_urglen = 0; +#else /* UIP_URGDATA > 0 */ + uip_appdata = ((char *)uip_appdata) + ((BUF->urgp[0] << 8) | BUF->urgp[1]); + uip_len -= (BUF->urgp[0] << 8) | BUF->urgp[1]; +#endif /* UIP_URGDATA > 0 */ + } + + /* If uip_len > 0 we have TCP data in the packet, and we flag this + by setting the UIP_NEWDATA flag and update the sequence number + we acknowledge. If the application has stopped the dataflow + using uip_stop(), we must not accept any data packets from the + remote host. */ + if(uip_len > 0 && !(uip_connr->tcpstateflags & UIP_STOPPED)) { + uip_flags |= UIP_NEWDATA; + uip_add_rcv_nxt(uip_len); + } + + /* Check if the available buffer space advertised by the other end + is smaller than the initial MSS for this connection. If so, we + set the current MSS to the window size to ensure that the + application does not send more data than the other end can + handle. + + If the remote host advertises a zero window, we set the MSS to + the initial MSS so that the application will send an entire MSS + of data. This data will not be acknowledged by the receiver, + and the application will retransmit it. This is called the + "persistent timer" and uses the retransmission mechanim. + */ + tmp16 = ((uint16_t)BUF->wnd[0] << 8) + (uint16_t)BUF->wnd[1]; + if(tmp16 > uip_connr->initialmss || + tmp16 == 0) { + tmp16 = uip_connr->initialmss; + } + uip_connr->mss = tmp16; + + /* If this packet constitutes an ACK for outstanding data (flagged + by the UIP_ACKDATA flag, we should call the application since it + might want to send more data. If the incoming packet had data + from the peer (as flagged by the UIP_NEWDATA flag), the + application must also be notified. + + When the application is called, the global variable uip_len + contains the length of the incoming data. The application can + access the incoming data through the global pointer + uip_appdata, which usually points UIP_IPTCPH_LEN + UIP_LLH_LEN + bytes into the uip_buf array. + + If the application wishes to send any data, this data should be + put into the uip_appdata and the length of the data should be + put into uip_len. If the application don't have any data to + send, uip_len must be set to 0. */ + if(uip_flags & (UIP_NEWDATA | UIP_ACKDATA)) { + uip_slen = 0; + UIP_APPCALL(); + + appsend: + + if(uip_flags & UIP_ABORT) { + uip_slen = 0; + uip_connr->tcpstateflags = UIP_CLOSED; + BUF->flags = TCP_RST | TCP_ACK; + goto tcp_send_nodata; + } + + if(uip_flags & UIP_CLOSE) { + uip_slen = 0; + uip_connr->len = 1; + uip_connr->tcpstateflags = UIP_FIN_WAIT_1; + uip_connr->nrtx = 0; + BUF->flags = TCP_FIN | TCP_ACK; + goto tcp_send_nodata; + } + + /* If uip_slen > 0, the application has data to be sent. */ + if(uip_slen > 0) { + + /* If the connection has acknowledged data, the contents of + the ->len variable should be discarded. */ + if((uip_flags & UIP_ACKDATA) != 0) { + uip_connr->len = 0; + } + + /* If the ->len variable is non-zero the connection has + already data in transit and cannot send anymore right + now. */ + if(uip_connr->len == 0) { + + /* The application cannot send more than what is allowed by + the mss (the minumum of the MSS and the available + window). */ + if(uip_slen > uip_connr->mss) { + uip_slen = uip_connr->mss; + } + + /* Remember how much data we send out now so that we know + when everything has been acknowledged. */ + uip_connr->len = uip_slen; + } else { + + /* If the application already had unacknowledged data, we + make sure that the application does not send (i.e., + retransmit) out more than it previously sent out. */ + uip_slen = uip_connr->len; + } + } + uip_connr->nrtx = 0; + apprexmit: + uip_appdata = uip_sappdata; + + /* If the application has data to be sent, or if the incoming + packet had new data in it, we must send out a packet. */ + if(uip_slen > 0 && uip_connr->len > 0) { + /* Add the length of the IP and TCP headers. */ + uip_len = uip_connr->len + UIP_TCPIP_HLEN; + /* We always set the ACK flag in response packets. */ + BUF->flags = TCP_ACK | TCP_PSH; + /* Send the packet. */ + goto tcp_send_noopts; + } + /* If there is no data to send, just send out a pure ACK if + there is newdata. */ + if(uip_flags & UIP_NEWDATA) { + uip_len = UIP_TCPIP_HLEN; + BUF->flags = TCP_ACK; + goto tcp_send_noopts; + } + } + goto drop; + case UIP_LAST_ACK: + /* We can close this connection if the peer has acknowledged our + FIN. This is indicated by the UIP_ACKDATA flag. */ + if(uip_flags & UIP_ACKDATA) { + uip_connr->tcpstateflags = UIP_CLOSED; + uip_flags = UIP_CLOSE; + UIP_APPCALL(); + } + break; + + case UIP_FIN_WAIT_1: + /* The application has closed the connection, but the remote host + hasn't closed its end yet. Thus we do nothing but wait for a + FIN from the other side. */ + if(uip_len > 0) { + uip_add_rcv_nxt(uip_len); + } + if(BUF->flags & TCP_FIN) { + if(uip_flags & UIP_ACKDATA) { + uip_connr->tcpstateflags = UIP_TIME_WAIT; + uip_connr->timer = 0; + uip_connr->len = 0; + } else { + uip_connr->tcpstateflags = UIP_CLOSING; + } + uip_add_rcv_nxt(1); + uip_flags = UIP_CLOSE; + UIP_APPCALL(); + goto tcp_send_ack; + } else if(uip_flags & UIP_ACKDATA) { + uip_connr->tcpstateflags = UIP_FIN_WAIT_2; + uip_connr->len = 0; + goto drop; + } + if(uip_len > 0) { + goto tcp_send_ack; + } + goto drop; + + case UIP_FIN_WAIT_2: + if(uip_len > 0) { + uip_add_rcv_nxt(uip_len); + } + if(BUF->flags & TCP_FIN) { + uip_connr->tcpstateflags = UIP_TIME_WAIT; + uip_connr->timer = 0; + uip_add_rcv_nxt(1); + uip_flags = UIP_CLOSE; + UIP_APPCALL(); + goto tcp_send_ack; + } + if(uip_len > 0) { + goto tcp_send_ack; + } + goto drop; + + case UIP_TIME_WAIT: + goto tcp_send_ack; + + case UIP_CLOSING: + if(uip_flags & UIP_ACKDATA) { + uip_connr->tcpstateflags = UIP_TIME_WAIT; + uip_connr->timer = 0; + } + } + goto drop; + + /* We jump here when we are ready to send the packet, and just want + to set the appropriate TCP sequence numbers in the TCP header. */ + tcp_send_ack: + BUF->flags = TCP_ACK; + + tcp_send_nodata: + uip_len = UIP_IPTCPH_LEN; + + tcp_send_noopts: + BUF->tcpoffset = (UIP_TCPH_LEN / 4) << 4; + + /* We're done with the input processing. We are now ready to send a + reply. Our job is to fill in all the fields of the TCP and IP + headers before calculating the checksum and finally send the + packet. */ + tcp_send: + BUF->ackno[0] = uip_connr->rcv_nxt[0]; + BUF->ackno[1] = uip_connr->rcv_nxt[1]; + BUF->ackno[2] = uip_connr->rcv_nxt[2]; + BUF->ackno[3] = uip_connr->rcv_nxt[3]; + + BUF->seqno[0] = uip_connr->snd_nxt[0]; + BUF->seqno[1] = uip_connr->snd_nxt[1]; + BUF->seqno[2] = uip_connr->snd_nxt[2]; + BUF->seqno[3] = uip_connr->snd_nxt[3]; + + BUF->srcport = uip_connr->lport; + BUF->destport = uip_connr->rport; + + uip_ipaddr_copy(&BUF->srcipaddr, &uip_hostaddr); + uip_ipaddr_copy(&BUF->destipaddr, &uip_connr->ripaddr); + + if(uip_connr->tcpstateflags & UIP_STOPPED) { + /* If the connection has issued uip_stop(), we advertise a zero + window so that the remote host will stop sending data. */ + BUF->wnd[0] = BUF->wnd[1] = 0; + } else { + BUF->wnd[0] = ((UIP_RECEIVE_WINDOW) >> 8); + BUF->wnd[1] = ((UIP_RECEIVE_WINDOW) & 0xff); + } + + tcp_send_noconn: + BUF->proto = UIP_PROTO_TCP; + + BUF->ttl = UIP_TTL; +#if NETSTACK_CONF_WITH_IPV6 + /* For IPv6, the IP length field does not include the IPv6 IP header + length. */ + BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8); + BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff); +#else /* NETSTACK_CONF_WITH_IPV6 */ + BUF->len[0] = (uip_len >> 8); + BUF->len[1] = (uip_len & 0xff); +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + BUF->urgp[0] = BUF->urgp[1] = 0; + + /* Calculate TCP checksum. */ + BUF->tcpchksum = 0; + BUF->tcpchksum = ~(uip_tcpchksum()); +#endif + + ip_send_nolen: +#if NETSTACK_CONF_WITH_IPV6 + BUF->vtc = 0x60; + BUF->tcflow = 0x00; + BUF->flow = 0x00; +#else /* NETSTACK_CONF_WITH_IPV6 */ + BUF->vhl = 0x45; + BUF->tos = 0; + BUF->ipoffset[0] = BUF->ipoffset[1] = 0; + ++ipid; + BUF->ipid[0] = ipid >> 8; + BUF->ipid[1] = ipid & 0xff; + /* Calculate IP checksum. */ + BUF->ipchksum = 0; + BUF->ipchksum = ~(uip_ipchksum()); + DEBUG_PRINTF("uip ip_send_nolen: chkecum 0x%04x\n", uip_ipchksum()); +#endif /* NETSTACK_CONF_WITH_IPV6 */ + UIP_STAT(++uip_stat.tcp.sent); +#if NETSTACK_CONF_WITH_IPV6 + send: +#endif /* NETSTACK_CONF_WITH_IPV6 */ + DEBUG_PRINTF("Sending packet with length %d (%d)\n", uip_len, + (BUF->len[0] << 8) | BUF->len[1]); + + UIP_STAT(++uip_stat.ip.sent); + /* Return and let the caller do the actual transmission. */ + uip_flags = 0; + return; + + drop: + uip_clear_buf(); + uip_flags = 0; + return; +} +/*---------------------------------------------------------------------------*/ +uint16_t +uip_htons(uint16_t val) +{ + return UIP_HTONS(val); +} + +uint32_t +uip_htonl(uint32_t val) +{ + return UIP_HTONL(val); +} +/*---------------------------------------------------------------------------*/ +void +uip_send(const void *data, int len) +{ + int copylen; + copylen = MIN(len, UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN - + (int)((char *)uip_sappdata - (char *)&uip_buf[UIP_LLH_LEN + UIP_TCPIP_HLEN])); + if(copylen > 0) { + uip_slen = copylen; + if(data != uip_sappdata) { + memcpy(uip_sappdata, (data), uip_slen); + } + } +} +/*---------------------------------------------------------------------------*/ +/** @}*/ diff --git a/Applications/netd/uip.h b/Applications/netd/uip.h new file mode 100644 index 00000000..79031040 --- /dev/null +++ b/Applications/netd/uip.h @@ -0,0 +1,2237 @@ +/* + * Copyright (c) 2001-2003, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * + */ + +/** + * \addtogroup uip + * @{ + */ + +/** + * \file + * Header file for the uIP TCP/IP stack. + * \author Adam Dunkels + * \author Julien Abeille (IPv6 related code) + * \author Mathilde Durvy (IPv6 related code) + * + * The uIP TCP/IP stack header file contains definitions for a number + * of C macros that are used by uIP programs as well as internal uIP + * structures, TCP/IP header structures and function declarations. + * + */ + +#ifndef UIP_H_ +#define UIP_H_ + +/* Header sizes. */ +#if NETSTACK_CONF_WITH_IPV6 +#define UIP_IPH_LEN 40 +#define UIP_FRAGH_LEN 8 +#else /* NETSTACK_CONF_WITH_IPV6 */ +#define UIP_IPH_LEN 20 /* Size of IP header */ +#endif /* NETSTACK_CONF_WITH_IPV6 */ + +#define UIP_UDPH_LEN 8 /* Size of UDP header */ +#define UIP_TCPH_LEN 20 /* Size of TCP header */ +#define UIP_ICMPH_LEN 4 /* Size of ICMP header */ + +#define UIP_IPUDPH_LEN (UIP_UDPH_LEN + UIP_IPH_LEN) /* Size of IP + UDP header */ +#define UIP_IPTCPH_LEN (UIP_TCPH_LEN + UIP_IPH_LEN) /* Size of IP + TCP header */ +#define UIP_TCPIP_HLEN UIP_IPTCPH_LEN +#define UIP_IPICMPH_LEN (UIP_IPH_LEN + UIP_ICMPH_LEN) /* Size of ICMP + IP header */ +#define UIP_LLIPH_LEN (UIP_LLH_LEN + UIP_IPH_LEN) /* Size of L2 + IP header */ +#if NETSTACK_CONF_WITH_IPV6 +/** + * The sums below are quite used in ND. When used for uip_buf, we + * include link layer length when used for uip_len, we do not, hence + * we need values with and without LLH_LEN we do not use capital + * letters as these values are variable + */ +#define uip_l2_l3_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len) +#define uip_l2_l3_icmp_hdr_len (UIP_LLH_LEN + UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN) +#define uip_l3_hdr_len (UIP_IPH_LEN + uip_ext_len) +#define uip_l3_icmp_hdr_len (UIP_IPH_LEN + uip_ext_len + UIP_ICMPH_LEN) +#endif /*NETSTACK_CONF_WITH_IPV6*/ + + +#include "uipopt.h" + +/* For memcmp */ +#include + +/** + * Representation of an IP address. + * + */ +typedef union uip_ip4addr_t { + uint8_t u8[4]; /* Initializer, must come first. */ + uint16_t u16[2]; +} uip_ip4addr_t; + +typedef union uip_ip6addr_t { + uint8_t u8[16]; /* Initializer, must come first. */ + uint16_t u16[8]; +} uip_ip6addr_t; + +#if NETSTACK_CONF_WITH_IPV6 +typedef uip_ip6addr_t uip_ipaddr_t; +#else /* NETSTACK_CONF_WITH_IPV6 */ +typedef uip_ip4addr_t uip_ipaddr_t; +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + +/*---------------------------------------------------------------------------*/ + +/** \brief 16 bit 802.15.4 address */ +typedef struct uip_802154_shortaddr { + uint8_t addr[2]; +} uip_802154_shortaddr; +/** \brief 64 bit 802.15.4 address */ +typedef struct uip_802154_longaddr { + uint8_t addr[8]; +} uip_802154_longaddr; + +/** \brief 802.11 address */ +typedef struct uip_80211_addr { + uint8_t addr[6]; +} uip_80211_addr; + +/** \brief 802.3 address */ +typedef struct uip_eth_addr { + uint8_t addr[6]; +} uip_eth_addr; + + +#if UIP_CONF_LL_802154 +/** \brief 802.15.4 address */ +typedef uip_802154_longaddr uip_lladdr_t; +#define UIP_802154_SHORTADDR_LEN 2 +#define UIP_802154_LONGADDR_LEN 8 +/** \brief Link layer address length */ +#define UIP_LLADDR_LEN UIP_802154_LONGADDR_LEN +#else /*UIP_CONF_LL_802154*/ +#if UIP_CONF_LL_80211 +/** \brief 802.11 address */ +typedef uip_80211_addr uip_lladdr_t; +/** \brief Link layer address length */ +#define UIP_LLADDR_LEN 6 +#else /*UIP_CONF_LL_80211*/ +/** \brief Ethernet address */ +typedef uip_eth_addr uip_lladdr_t; +/** \brief Link layer address length */ +#define UIP_LLADDR_LEN 6 +#endif /*UIP_CONF_LL_80211*/ +#endif /*UIP_CONF_LL_802154*/ + +//#include "tcpip.h" + +/*---------------------------------------------------------------------------*/ +/* First, the functions that should be called from the + * system. Initialization, the periodic timer, and incoming packets are + * handled by the following three functions. + */ +/** + * \defgroup uipconffunc uIP configuration functions + * @{ + * + * The uIP configuration functions are used for setting run-time + * parameters in uIP such as IP addresses. + */ + +/** + * Set the IP address of this host. + * + * The IP address is represented as a 4-byte array where the first + * octet of the IP address is put in the first member of the 4-byte + * array. + * + * Example: + \code + + uip_ipaddr_t addr; + + uip_ipaddr(&addr, 192,168,1,2); + uip_sethostaddr(&addr); + + \endcode + * \param addr A pointer to an IP address of type uip_ipaddr_t; + * + * \sa uip_ipaddr() + * + * \hideinitializer + */ +#define uip_sethostaddr(addr) uip_ipaddr_copy(&uip_hostaddr, (addr)) + +/** + * Get the IP address of this host. + * + * The IP address is represented as a 4-byte array where the first + * octet of the IP address is put in the first member of the 4-byte + * array. + * + * Example: + \code + uip_ipaddr_t hostaddr; + + uip_gethostaddr(&hostaddr); + \endcode + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the currently configured IP address. + * + * \hideinitializer + */ +#define uip_gethostaddr(addr) uip_ipaddr_copy((addr), &uip_hostaddr) + +/** + * Set the default router's IP address. + * + * \param addr A pointer to a uip_ipaddr_t variable containing the IP + * address of the default router. + * + * \sa uip_ipaddr() + * + * \hideinitializer + */ +#define uip_setdraddr(addr) uip_ipaddr_copy(&uip_draddr, (addr)) + +/** + * Set the netmask. + * + * \param addr A pointer to a uip_ipaddr_t variable containing the IP + * address of the netmask. + * + * \sa uip_ipaddr() + * + * \hideinitializer + */ +#define uip_setnetmask(addr) uip_ipaddr_copy(&uip_netmask, (addr)) + + +/** + * Get the default router's IP address. + * + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the IP address of the default router. + * + * \hideinitializer + */ +#define uip_getdraddr(addr) uip_ipaddr_copy((addr), &uip_draddr) + +/** + * Get the netmask. + * + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the value of the netmask. + * + * \hideinitializer + */ +#define uip_getnetmask(addr) uip_ipaddr_copy((addr), &uip_netmask) + +/** @} */ + +/** + * \defgroup uipinit uIP initialization functions + * @{ + * + * The uIP initialization functions are used for booting uIP. + */ + +/** + * uIP initialization function. + * + * This function should be called at boot up to initilize the uIP + * TCP/IP stack. + */ +void uip_init(void); + +/** + * uIP initialization function. + * + * This function may be used at boot time to set the initial ip_id. + */ +void uip_setipid(uint16_t id); + +/** @} */ + +/** + * \defgroup uipdevfunc uIP device driver functions + * @{ + * + * These functions are used by a network device driver for interacting + * with uIP. + */ + +/** + * Process an incoming packet. + * + * This function should be called when the device driver has received + * a packet from the network. The packet from the device driver must + * be present in the uip_buf buffer, and the length of the packet + * should be placed in the uip_len variable. + * + * When the function returns, there may be an outbound packet placed + * in the uip_buf packet buffer. If so, the uip_len variable is set to + * the length of the packet. If no packet is to be sent out, the + * uip_len variable is set to 0. + * + * The usual way of calling the function is presented by the source + * code below. + \code + uip_len = devicedriver_poll(); + if(uip_len > 0) { + uip_input(); + if(uip_len > 0) { + devicedriver_send(); + } + } + \endcode + * + * \note If you are writing a uIP device driver that needs ARP + * (Address Resolution Protocol), e.g., when running uIP over + * Ethernet, you will need to call the uIP ARP code before calling + * this function: + \code + #define BUF ((struct uip_eth_hdr *)&uip_buf[0]) + uip_len = ethernet_devicedrver_poll(); + if(uip_len > 0) { + if(BUF->type == UIP_HTONS(UIP_ETHTYPE_IP)) { + uip_arp_ipin(); + uip_input(); + if(uip_len > 0) { + uip_arp_out(); + ethernet_devicedriver_send(); + } + } else if(BUF->type == UIP_HTONS(UIP_ETHTYPE_ARP)) { + uip_arp_arpin(); + if(uip_len > 0) { + ethernet_devicedriver_send(); + } + } + \endcode + * + * \hideinitializer + */ +#define uip_input() uip_process(UIP_DATA) + + +/** + * Periodic processing for a connection identified by its number. + * + * This function does the necessary periodic processing (timers, + * polling) for a uIP TCP connection, and should be called when the + * periodic uIP timer goes off. It should be called for every + * connection, regardless of whether they are open of closed. + * + * When the function returns, it may have an outbound packet waiting + * for service in the uIP packet buffer, and if so the uip_len + * variable is set to a value larger than zero. The device driver + * should be called to send out the packet. + * + * The usual way of calling the function is through a for() loop like + * this: + \code + for(i = 0; i < UIP_CONNS; ++i) { + uip_periodic(i); + if(uip_len > 0) { + devicedriver_send(); + } + } + \endcode + * + * \note If you are writing a uIP device driver that needs ARP + * (Address Resolution Protocol), e.g., when running uIP over + * Ethernet, you will need to call the uip_arp_out() function before + * calling the device driver: + \code + for(i = 0; i < UIP_CONNS; ++i) { + uip_periodic(i); + if(uip_len > 0) { + uip_arp_out(); + ethernet_devicedriver_send(); + } + } + \endcode + * + * \param conn The number of the connection which is to be periodically polled. + * + * \hideinitializer + */ +#if UIP_TCP +#define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \ + uip_process(UIP_TIMER); } while (0) + +/** + * Macro to determine whether a specific uIP connection is active + * + * \param conn The connection's number + * \retval 0 Connection closed + */ +#define uip_conn_active(conn) (uip_conns[conn].tcpstateflags != UIP_CLOSED) + +/** + * Perform periodic processing for a connection identified by a pointer + * to its structure. + * + * Same as uip_periodic() but takes a pointer to the actual uip_conn + * struct instead of an integer as its argument. This function can be + * used to force periodic processing of a specific connection. + * + * \param conn A pointer to the uip_conn struct for the connection to + * be processed. + * + * \hideinitializer + */ +#define uip_periodic_conn(conn) do { uip_conn = conn; \ + uip_process(UIP_TIMER); } while (0) + +/** + * Request that a particular connection should be polled. + * + * Similar to uip_periodic_conn() but does not perform any timer + * processing. The application is polled for new data. + * + * \param conn A pointer to the uip_conn struct for the connection to + * be processed. + * + * \hideinitializer + */ +#define uip_poll_conn(conn) do { uip_conn = conn; \ + uip_process(UIP_POLL_REQUEST); } while (0) + +#endif /* UIP_TCP */ + +#if UIP_UDP +/** + * Periodic processing for a UDP connection identified by its number. + * + * This function is essentially the same as uip_periodic(), but for + * UDP connections. It is called in a similar fashion as the + * uip_periodic() function: + \code + for(i = 0; i < UIP_UDP_CONNS; i++) { + uip_udp_periodic(i); + if(uip_len > 0) { + devicedriver_send(); + } + } + \endcode + * + * \note As for the uip_periodic() function, special care has to be + * taken when using uIP together with ARP and Ethernet: + \code + for(i = 0; i < UIP_UDP_CONNS; i++) { + uip_udp_periodic(i); + if(uip_len > 0) { + uip_arp_out(); + ethernet_devicedriver_send(); + } + } + \endcode + * + * \param conn The number of the UDP connection to be processed. + * + * \hideinitializer + */ +#define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \ + uip_process(UIP_UDP_TIMER); } while(0) + +/** + * Periodic processing for a UDP connection identified by a pointer to + * its structure. + * + * Same as uip_udp_periodic() but takes a pointer to the actual + * uip_conn struct instead of an integer as its argument. This + * function can be used to force periodic processing of a specific + * connection. + * + * \param conn A pointer to the uip_udp_conn struct for the connection + * to be processed. + * + * \hideinitializer + */ +#define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \ + uip_process(UIP_UDP_TIMER); } while(0) +#endif /* UIP_UDP */ + +/** \brief Abandon the reassembly of the current packet */ +void uip_reass_over(void); + +/** + * The uIP packet buffer. + * + * The uip_aligned_buf array is used to hold incoming and outgoing + * packets. The device driver should place incoming data into this + * buffer. When sending data, the device driver should read the link + * level headers and the TCP/IP headers from this buffer. The size of + * the link level headers is configured by the UIP_LLH_LEN define. + * + * \note The application data need not be placed in this buffer, so + * the device driver must read it from the place pointed to by the + * uip_appdata pointer as illustrated by the following example: + \code + void + devicedriver_send(void) + { + hwsend(&uip_buf[0], UIP_LLH_LEN); + if(uip_len <= UIP_LLH_LEN + UIP_TCPIP_HLEN) { + hwsend(&uip_buf[UIP_LLH_LEN], uip_len - UIP_LLH_LEN); + } else { + hwsend(&uip_buf[UIP_LLH_LEN], UIP_TCPIP_HLEN); + hwsend(uip_appdata, uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN); + } + } + \endcode +*/ + +typedef union { + uint32_t u32[(UIP_BUFSIZE + 3) / 4]; + uint8_t u8[UIP_BUFSIZE]; +} uip_buf_t; + +CCIF extern uip_buf_t uip_aligned_buf; + +/** Macro to access uip_aligned_buf as an array of bytes */ +#define uip_buf (uip_aligned_buf.u8) + + +/** @} */ + +/*---------------------------------------------------------------------------*/ +/* Functions that are used by the uIP application program. Opening and + * closing connections, sending and receiving data, etc. is all + * handled by the functions below. + */ +/** + * \defgroup uipappfunc uIP application functions + * @{ + * + * Functions used by an application running on top of uIP. + */ + +/** + * Start listening to the specified port. + * + * \note Since this function expects the port number in network byte + * order, a conversion using UIP_HTONS() or uip_htons() is necessary. + * + \code + uip_listen(UIP_HTONS(80)); + \endcode + * + * \param port A 16-bit port number in network byte order. + */ +void uip_listen(uint16_t port); + +/** + * Stop listening to the specified port. + * + * \note Since this function expects the port number in network byte + * order, a conversion using UIP_HTONS() or uip_htons() is necessary. + * + \code + uip_unlisten(UIP_HTONS(80)); + \endcode + * + * \param port A 16-bit port number in network byte order. + */ +void uip_unlisten(uint16_t port); + +/** + * Connect to a remote host using TCP. + * + * This function is used to start a new connection to the specified + * port on the specified host. It allocates a new connection identifier, + * sets the connection to the SYN_SENT state and sets the + * retransmission timer to 0. This will cause a TCP SYN segment to be + * sent out the next time this connection is periodically processed, + * which usually is done within 0.5 seconds after the call to + * uip_connect(). + * + * \note This function is available only if support for active open + * has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h. + * + * \note Since this function requires the port number to be in network + * byte order, a conversion using UIP_HTONS() or uip_htons() is necessary. + * + \code + uip_ipaddr_t ipaddr; + + uip_ipaddr(&ipaddr, 192,168,1,2); + uip_connect(&ipaddr, UIP_HTONS(80)); + \endcode + * + * \param ripaddr The IP address of the remote host. + * + * \param port A 16-bit port number in network byte order. + * + * \return A pointer to the uIP connection identifier for the new connection, + * or NULL if no connection could be allocated. + * + */ +struct uip_conn *uip_connect(const uip_ipaddr_t *ripaddr, uint16_t port); + + + +/** + * \internal + * + * Check if a connection has outstanding (i.e., unacknowledged) data. + * + * \param conn A pointer to the uip_conn structure for the connection. + * + * \hideinitializer + */ +#define uip_outstanding(conn) ((conn)->len) + +/** + * Send data on the current connection. + * + * This function is used to send out a single segment of TCP + * data. Only applications that have been invoked by uIP for event + * processing can send data. + * + * The amount of data that actually is sent out after a call to this + * function is determined by the maximum amount of data TCP allows. uIP + * will automatically crop the data so that only the appropriate + * amount of data is sent. The function uip_mss() can be used to query + * uIP for the amount of data that actually will be sent. + * + * \note This function does not guarantee that the sent data will + * arrive at the destination. If the data is lost in the network, the + * application will be invoked with the uip_rexmit() event being + * set. The application will then have to resend the data using this + * function. + * + * \param data A pointer to the data which is to be sent. + * + * \param len The maximum amount of data bytes to be sent. + * + * \hideinitializer + */ +CCIF void uip_send(const void *data, int len); + +/** + * The length of any incoming data that is currently available (if available) + * in the uip_appdata buffer. + * + * The test function uip_data() must first be used to check if there + * is any data available at all. + * + * \hideinitializer + */ +/*void uip_datalen(void);*/ +#define uip_datalen() uip_len + +/** + * The length of any out-of-band data (urgent data) that has arrived + * on the connection. + * + * \note The configuration parameter UIP_URGDATA must be set for this + * function to be enabled. + * + * \hideinitializer + */ +#define uip_urgdatalen() uip_urglen + +/** + * Close the current connection. + * + * This function will close the current connection in a nice way. + * + * \hideinitializer + */ +#define uip_close() (uip_flags = UIP_CLOSE) + +/** + * Abort the current connection. + * + * This function will abort (reset) the current connection, and is + * usually used when an error has occurred that prevents using the + * uip_close() function. + * + * \hideinitializer + */ +#define uip_abort() (uip_flags = UIP_ABORT) + +/** + * Tell the sending host to stop sending data. + * + * This function will close our receiver's window so that we stop + * receiving data for the current connection. + * + * \hideinitializer + */ +#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED) + +/** + * Find out if the current connection has been previously stopped with + * uip_stop(). + * + * \hideinitializer + */ +#define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED) + +/** + * Restart the current connection, if is has previously been stopped + * with uip_stop(). + * + * This function will open the receiver's window again so that we + * start receiving data for the current connection. + * + * \hideinitializer + */ +#define uip_restart() do { uip_flags |= UIP_NEWDATA; \ + uip_conn->tcpstateflags &= ~UIP_STOPPED; \ + } while(0) + + +/* uIP tests that can be made to determine in what state the current + connection is, and what the application function should do. */ + +/** + * Is the current connection a UDP connection? + * + * This function checks whether the current connection is a UDP connection. + * + * \hideinitializer + * + */ +#define uip_udpconnection() (uip_conn == NULL) + +/** + * Is new incoming data available? + * + * Will reduce to non-zero if there is new data for the application + * present at the uip_appdata pointer. The size of the data is + * available through the uip_len variable. + * + * \hideinitializer + */ +#define uip_newdata() (uip_flags & UIP_NEWDATA) + +/** + * Has previously sent data been acknowledged? + * + * Will reduce to non-zero if the previously sent data has been + * acknowledged by the remote host. This means that the application + * can send new data. + * + * \hideinitializer + */ +#define uip_acked() (uip_flags & UIP_ACKDATA) + +/** + * Has the connection just been connected? + * + * Reduces to non-zero if the current connection has been connected to + * a remote host. This will happen both if the connection has been + * actively opened (with uip_connect()) or passively opened (with + * uip_listen()). + * + * \hideinitializer + */ +#define uip_connected() (uip_flags & UIP_CONNECTED) + +/** + * Has the connection been closed by the other end? + * + * Is non-zero if the connection has been closed by the remote + * host. The application may then do the necessary clean-ups. + * + * \hideinitializer + */ +#define uip_closed() (uip_flags & UIP_CLOSE) + +/** + * Has the connection been aborted by the other end? + * + * Non-zero if the current connection has been aborted (reset) by the + * remote host. + * + * \hideinitializer + */ +#define uip_aborted() (uip_flags & UIP_ABORT) + +/** + * Has the connection timed out? + * + * Non-zero if the current connection has been aborted due to too many + * retransmissions. + * + * \hideinitializer + */ +#define uip_timedout() (uip_flags & UIP_TIMEDOUT) + +/** + * Do we need to retransmit previously data? + * + * Reduces to non-zero if the previously sent data has been lost in + * the network, and the application should retransmit it. The + * application should send the exact same data as it did the last + * time, using the uip_send() function. + * + * \hideinitializer + */ +#define uip_rexmit() (uip_flags & UIP_REXMIT) + +/** + * Is the connection being polled by uIP? + * + * Is non-zero if the reason the application is invoked is that the + * current connection has been idle for a while and should be + * polled. + * + * The polling event can be used for sending data without having to + * wait for the remote host to send data. + * + * \hideinitializer + */ +#define uip_poll() (uip_flags & UIP_POLL) + +/** + * Get the initial maximum segment size (MSS) of the current + * connection. + * + * \hideinitializer + */ +#define uip_initialmss() (uip_conn->initialmss) + +/** + * Get the current maximum segment size that can be sent on the current + * connection. + * + * The current maximum segment size that can be sent on the + * connection is computed from the receiver's window and the MSS of + * the connection (which also is available by calling + * uip_initialmss()). + * + * \hideinitializer + */ +#define uip_mss() (uip_conn->mss) + +/** + * Set up a new UDP connection. + * + * This function sets up a new UDP connection. The function will + * automatically allocate an unused local port for the new + * connection. However, another port can be chosen by using the + * uip_udp_bind() call, after the uip_udp_new() function has been + * called. + * + * Example: + \code + uip_ipaddr_t addr; + struct uip_udp_conn *c; + + uip_ipaddr(&addr, 192,168,2,1); + c = uip_udp_new(&addr, UIP_HTONS(12345)); + if(c != NULL) { + uip_udp_bind(c, UIP_HTONS(12344)); + } + \endcode + * \param ripaddr The IP address of the remote host. + * + * \param rport The remote port number in network byte order. + * + * \return The uip_udp_conn structure for the new connection, or NULL + * if no connection could be allocated. + */ +struct uip_udp_conn *uip_udp_new(const uip_ipaddr_t *ripaddr, uint16_t rport); + +/** + * Remove a UDP connection. + * + * \param conn A pointer to the uip_udp_conn structure for the connection. + * + * \hideinitializer + */ +#define uip_udp_remove(conn) (conn)->lport = 0 + +/** + * Bind a UDP connection to a local port. + * + * \param conn A pointer to the uip_udp_conn structure for the + * connection. + * + * \param port The local port number, in network byte order. + * + * \hideinitializer + */ +#define uip_udp_bind(conn, port) (conn)->lport = port + +/** + * Send a UDP datagram of length len on the current connection. + * + * This function can only be called in response to a UDP event (poll + * or newdata). The data must be present in the uip_buf buffer, at the + * place pointed to by the uip_appdata pointer. + * + * \param len The length of the data in the uip_buf buffer. + * + * \hideinitializer + */ +#define uip_udp_send(len) uip_send((char *)uip_appdata, len) + +/** @} */ + +/* uIP convenience and converting functions. */ + +/** + * \defgroup uipconvfunc uIP conversion functions + * @{ + * + * These functions can be used for converting between different data + * formats used by uIP. + */ + +/** + * Convert an IP address to four bytes separated by commas. + * + * Example: + \code + uip_ipaddr_t ipaddr; + printf("ipaddr=%d.%d.%d.%d\n", uip_ipaddr_to_quad(&ipaddr)); + \endcode + * + * \param a A pointer to a uip_ipaddr_t. + * \hideinitializer + */ +#define uip_ipaddr_to_quad(a) (a)->u8[0],(a)->u8[1],(a)->u8[2],(a)->u8[3] + +/** + * Construct an IP address from four bytes. + * + * This function constructs an IP address of the type that uIP handles + * internally from four bytes. The function is handy for specifying IP + * addresses to use with e.g. the uip_connect() function. + * + * Example: + \code + uip_ipaddr_t ipaddr; + struct uip_conn *c; + + uip_ipaddr(&ipaddr, 192,168,1,2); + c = uip_connect(&ipaddr, UIP_HTONS(80)); + \endcode + * + * \param addr A pointer to a uip_ipaddr_t variable that will be + * filled in with the IP address. + * + * \param addr0 The first octet of the IP address. + * \param addr1 The second octet of the IP address. + * \param addr2 The third octet of the IP address. + * \param addr3 The forth octet of the IP address. + * + * \hideinitializer + */ +#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \ + (addr)->u8[0] = addr0; \ + (addr)->u8[1] = addr1; \ + (addr)->u8[2] = addr2; \ + (addr)->u8[3] = addr3; \ + } while(0) + +/** + * Construct an IPv6 address from eight 16-bit words. + * + * This function constructs an IPv6 address. + * + * \hideinitializer + */ +#define uip_ip6addr(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7) do { \ + (addr)->u16[0] = UIP_HTONS(addr0); \ + (addr)->u16[1] = UIP_HTONS(addr1); \ + (addr)->u16[2] = UIP_HTONS(addr2); \ + (addr)->u16[3] = UIP_HTONS(addr3); \ + (addr)->u16[4] = UIP_HTONS(addr4); \ + (addr)->u16[5] = UIP_HTONS(addr5); \ + (addr)->u16[6] = UIP_HTONS(addr6); \ + (addr)->u16[7] = UIP_HTONS(addr7); \ + } while(0) + +/** + * Construct an IPv6 address from sixteen 8-bit words. + * + * This function constructs an IPv6 address. + * + * \hideinitializer + */ +#define uip_ip6addr_u8(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7,addr8,addr9,addr10,addr11,addr12,addr13,addr14,addr15) do { \ + (addr)->u8[0] = addr0; \ + (addr)->u8[1] = addr1; \ + (addr)->u8[2] = addr2; \ + (addr)->u8[3] = addr3; \ + (addr)->u8[4] = addr4; \ + (addr)->u8[5] = addr5; \ + (addr)->u8[6] = addr6; \ + (addr)->u8[7] = addr7; \ + (addr)->u8[8] = addr8; \ + (addr)->u8[9] = addr9; \ + (addr)->u8[10] = addr10; \ + (addr)->u8[11] = addr11; \ + (addr)->u8[12] = addr12; \ + (addr)->u8[13] = addr13; \ + (addr)->u8[14] = addr14; \ + (addr)->u8[15] = addr15; \ + } while(0) + + +/** + * Copy an IP address from one place to another. + * + * Copies an IP address from one place to another. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2; + + uip_ipaddr(&ipaddr1, 192,16,1,2); + uip_ipaddr_copy(&ipaddr2, &ipaddr1); + \endcode + * + * \param dest The destination for the copy. + * \param src The source from where to copy. + * + * \hideinitializer + */ +#ifndef uip_ipaddr_copy +#define uip_ipaddr_copy(dest, src) (*(dest) = *(src)) +#endif +#ifndef uip_ip4addr_copy +#define uip_ip4addr_copy(dest, src) (*((uip_ip4addr_t *)dest) = *((uip_ip4addr_t *)src)) +#endif +#ifndef uip_ip6addr_copy +#define uip_ip6addr_copy(dest, src) (*((uip_ip6addr_t *)dest) = *((uip_ip6addr_t *)src)) +#endif + +/** + * Compare two IP addresses + * + * Compares two IP addresses. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2; + + uip_ipaddr(&ipaddr1, 192,16,1,2); + if(uip_ipaddr_cmp(&ipaddr2, &ipaddr1)) { + printf("They are the same"); + } + \endcode + * + * \param addr1 The first IP address. + * \param addr2 The second IP address. + * + * \hideinitializer + */ +#define uip_ip4addr_cmp(addr1, addr2) ((addr1)->u16[0] == (addr2)->u16[0] && \ + (addr1)->u16[1] == (addr2)->u16[1]) +#define uip_ip6addr_cmp(addr1, addr2) (memcmp(addr1, addr2, sizeof(uip_ip6addr_t)) == 0) + +#if NETSTACK_CONF_WITH_IPV6 +#define uip_ipaddr_cmp(addr1, addr2) uip_ip6addr_cmp(addr1, addr2) +#else /* NETSTACK_CONF_WITH_IPV6 */ +#define uip_ipaddr_cmp(addr1, addr2) uip_ip4addr_cmp(addr1, addr2) +#endif /* NETSTACK_CONF_WITH_IPV6 */ + +/** + * Compare two IP addresses with netmasks + * + * Compares two IP addresses with netmasks. The masks are used to mask + * out the bits that are to be compared. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2, mask; + + uip_ipaddr(&mask, 255,255,255,0); + uip_ipaddr(&ipaddr1, 192,16,1,2); + uip_ipaddr(&ipaddr2, 192,16,1,3); + if(uip_ipaddr_maskcmp(&ipaddr1, &ipaddr2, &mask)) { + printf("They are the same"); + } + \endcode + * + * \param addr1 The first IP address. + * \param addr2 The second IP address. + * \param mask The netmask. + * + * \hideinitializer + */ + +#define uip_ipaddr_maskcmp(addr1, addr2, mask) \ + (((((uint16_t *)addr1)[0] & ((uint16_t *)mask)[0]) == \ + (((uint16_t *)addr2)[0] & ((uint16_t *)mask)[0])) && \ + ((((uint16_t *)addr1)[1] & ((uint16_t *)mask)[1]) == \ + (((uint16_t *)addr2)[1] & ((uint16_t *)mask)[1]))) + +#define uip_ipaddr_prefixcmp(addr1, addr2, length) (memcmp(addr1, addr2, length>>3) == 0) + + + +/* + * Check if an address is a broadcast address for a network. + * + * Checks if an address is the broadcast address for a network. The + * network is defined by an IP address that is on the network and the + * network's netmask. + * + * \param addr The IP address. + * \param netaddr The network's IP address. + * \param netmask The network's netmask. + * + * \hideinitializer + */ +/*#define uip_ipaddr_isbroadcast(addr, netaddr, netmask) + ((uip_ipaddr_t *)(addr)).u16 & ((uip_ipaddr_t *)(addr)).u16*/ + + + +/** + * Mask out the network part of an IP address. + * + * Masks out the network part of an IP address, given the address and + * the netmask. + * + * Example: + \code + uip_ipaddr_t ipaddr1, ipaddr2, netmask; + + uip_ipaddr(&ipaddr1, 192,16,1,2); + uip_ipaddr(&netmask, 255,255,255,0); + uip_ipaddr_mask(&ipaddr2, &ipaddr1, &netmask); + \endcode + * + * In the example above, the variable "ipaddr2" will contain the IP + * address 192.168.1.0. + * + * \param dest Where the result is to be placed. + * \param src The IP address. + * \param mask The netmask. + * + * \hideinitializer + */ +#define uip_ipaddr_mask(dest, src, mask) do { \ + ((uint16_t *)dest)[0] = ((uint16_t *)src)[0] & ((uint16_t *)mask)[0]; \ + ((uint16_t *)dest)[1] = ((uint16_t *)src)[1] & ((uint16_t *)mask)[1]; \ + } while(0) + +/** + * Pick the first octet of an IP address. + * + * Picks out the first octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + uint8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr1(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 1. + * + * \hideinitializer + */ +#define uip_ipaddr1(addr) ((addr)->u8[0]) + +/** + * Pick the second octet of an IP address. + * + * Picks out the second octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + uint8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr2(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 2. + * + * \hideinitializer + */ +#define uip_ipaddr2(addr) ((addr)->u8[1]) + +/** + * Pick the third octet of an IP address. + * + * Picks out the third octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + uint8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr3(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 3. + * + * \hideinitializer + */ +#define uip_ipaddr3(addr) ((addr)->u8[2]) + +/** + * Pick the fourth octet of an IP address. + * + * Picks out the fourth octet of an IP address. + * + * Example: + \code + uip_ipaddr_t ipaddr; + uint8_t octet; + + uip_ipaddr(&ipaddr, 1,2,3,4); + octet = uip_ipaddr4(&ipaddr); + \endcode + * + * In the example above, the variable "octet" will contain the value 4. + * + * \hideinitializer + */ +#define uip_ipaddr4(addr) ((addr)->u8[3]) + +/** + * Convert 16-bit quantity from host byte order to network byte order. + * + * This macro is primarily used for converting constants from host + * byte order to network byte order. For converting variables to + * network byte order, use the uip_htons() function instead. + * + * \hideinitializer + */ +#ifndef UIP_HTONS +# if UIP_BYTE_ORDER == UIP_BIG_ENDIAN +# define UIP_HTONS(n) (n) +# define UIP_HTONL(n) (n) +# else /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */ +# define UIP_HTONS(n) (uint16_t)((((uint16_t) (n)) << 8) | (((uint16_t) (n)) >> 8)) +# define UIP_HTONL(n) (((uint32_t)UIP_HTONS(n) << 16) | UIP_HTONS((uint32_t)(n) >> 16)) +# endif /* UIP_BYTE_ORDER == UIP_BIG_ENDIAN */ +#else +#error "UIP_HTONS already defined!" +#endif /* UIP_HTONS */ + +/** + * Convert a 16-bit quantity from host byte order to network byte order. + * + * This function is primarily used for converting variables from host + * byte order to network byte order. For converting constants to + * network byte order, use the UIP_HTONS() macro instead. + */ +#ifndef uip_htons +CCIF uint16_t uip_htons(uint16_t val); +#endif /* uip_htons */ +#ifndef uip_ntohs +#define uip_ntohs uip_htons +#endif + +#ifndef uip_htonl +CCIF uint32_t uip_htonl(uint32_t val); +#endif /* uip_htonl */ +#ifndef uip_ntohl +#define uip_ntohl uip_htonl +#endif + +/** @} */ + +/** + * Pointer to the application data in the packet buffer. + * + * This pointer points to the application data when the application is + * called. If the application wishes to send data, the application may + * use this space to write the data into before calling uip_send(). + */ +CCIF extern void *uip_appdata; + +#if UIP_URGDATA > 0 +/* uint8_t *uip_urgdata: + * + * This pointer points to any urgent data that has been received. Only + * present if compiled with support for urgent data (UIP_URGDATA). + */ +extern void *uip_urgdata; +#endif /* UIP_URGDATA > 0 */ + + +/** + * \defgroup uipdrivervars Variables used in uIP device drivers + * @{ + * + * uIP has a few global variables that are used in device drivers for + * uIP. + */ + +/** + * The length of the packet in the uip_buf buffer. + * + * The global variable uip_len holds the length of the packet in the + * uip_buf buffer. + * + * When the network device driver calls the uIP input function, + * uip_len should be set to the length of the packet in the uip_buf + * buffer. + * + * When sending packets, the device driver should use the contents of + * the uip_len variable to determine the length of the outgoing + * packet. + * + */ +CCIF extern uint16_t uip_len; + +/** + * The length of the extension headers + */ +extern uint8_t uip_ext_len; +/** @} */ + +#if UIP_URGDATA > 0 +extern uint16_t uip_urglen, uip_surglen; +#endif /* UIP_URGDATA > 0 */ + +/* + * Clear uIP buffer + * + * This function clears the uIP buffer by reseting the uip_len and + * uip_ext_len pointers. + */ +#if NETSTACK_CONF_WITH_IPV6 +#define uip_clear_buf() { \ + uip_len = 0; \ + uip_ext_len = 0; \ +} +#else /*NETSTACK_CONF_WITH_IPV6*/ +#define uip_clear_buf() { \ + uip_len = 0; \ +} +#endif /*NETSTACK_CONF_WITH_IPV6*/ + +/** + * Representation of a uIP TCP connection. + * + * The uip_conn structure is used for identifying a connection. All + * but one field in the structure are to be considered read-only by an + * application. The only exception is the appstate field whose purpose + * is to let the application store application-specific state (e.g., + * file pointers) for the connection. The type of this field is + * configured in the "uipopt.h" header file. + */ +struct uip_conn { + uip_ipaddr_t ripaddr; /**< The IP address of the remote host. */ + + uint16_t lport; /**< The local TCP port, in network byte order. */ + uint16_t rport; /**< The local remote TCP port, in network byte + order. */ + + uint8_t rcv_nxt[4]; /**< The sequence number that we expect to + receive next. */ + uint8_t snd_nxt[4]; /**< The sequence number that was last sent by us. */ + uint16_t len; /**< Length of the data that was previously sent. */ + uint16_t mss; /**< Current maximum segment size for the connection. */ + uint16_t initialmss; /**< Initial maximum segment size for the connection. */ + uint8_t sa; /**< Retransmission time-out calculation state variable. */ + uint8_t sv; /**< Retransmission time-out calculation state variable. */ + uint8_t rto; /**< Retransmission time-out. */ + uint8_t tcpstateflags; /**< TCP state and flags. */ + uint8_t timer; /**< The retransmission timer. */ + uint8_t nrtx; /**< The number of retransmissions for the last + segment sent. */ + + uip_tcp_appstate_t appstate; /** The application state. */ +}; + + +/** + * Pointer to the current TCP connection. + * + * The uip_conn pointer can be used to access the current TCP + * connection. + */ + +CCIF extern struct uip_conn *uip_conn; +#if UIP_TCP +/* The array containing all uIP connections. */ +CCIF extern struct uip_conn uip_conns[UIP_CONNS]; +#endif + +/** + * \addtogroup uiparch + * @{ + */ + +/** + * 4-byte array used for the 32-bit sequence number calculations. + */ +extern uint8_t uip_acc32[4]; +/** @} */ + +/** + * Representation of a uIP UDP connection. + */ +struct uip_udp_conn { + uip_ipaddr_t ripaddr; /**< The IP address of the remote peer. */ + uint16_t lport; /**< The local port number in network byte order. */ + uint16_t rport; /**< The remote port number in network byte order. */ + uint8_t ttl; /**< Default time-to-live. */ + + /** The application state. */ + uip_udp_appstate_t appstate; +}; + +/** + * The current UDP connection. + */ +extern struct uip_udp_conn *uip_udp_conn; +extern struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS]; + +struct uip_fallback_interface { + void (*init)(void); + /** + * \retval >=0 + * in case of success + * \retval <0 + * in case of failure + */ + int (*output)(void); +}; + +#if UIP_CONF_ICMP6 +struct uip_icmp6_conn { + uip_icmp6_appstate_t appstate; +}; +extern struct uip_icmp6_conn uip_icmp6_conns; +#endif /*UIP_CONF_ICMP6*/ + +/** + * The uIP TCP/IP statistics. + * + * This is the variable in which the uIP TCP/IP statistics are gathered. + */ +#if UIP_STATISTICS == 1 +extern struct uip_stats uip_stat; +#define UIP_STAT(s) s +#else +#define UIP_STAT(s) +#endif /* UIP_STATISTICS == 1 */ + +/** + * The structure holding the TCP/IP statistics that are gathered if + * UIP_STATISTICS is set to 1. + * + */ +struct uip_stats { + struct { + uip_stats_t recv; /**< Number of received packets at the IP layer. */ + uip_stats_t sent; /**< Number of sent packets at the IP layer. */ + uip_stats_t forwarded;/**< Number of forwarded packets at the IP layer. */ + uip_stats_t drop; /**< Number of dropped packets at the IP layer. */ + uip_stats_t vhlerr; /**< Number of packets dropped due to wrong + IP version or header length. */ + uip_stats_t hblenerr; /**< Number of packets dropped due to wrong + IP length, high byte. */ + uip_stats_t lblenerr; /**< Number of packets dropped due to wrong + IP length, low byte. */ + uip_stats_t fragerr; /**< Number of packets dropped because they + were IP fragments. */ + uip_stats_t chkerr; /**< Number of packets dropped due to IP + checksum errors. */ + uip_stats_t protoerr; /**< Number of packets dropped because they + were neither ICMP, UDP nor TCP. */ + } ip; /**< IP statistics. */ + struct { + uip_stats_t recv; /**< Number of received ICMP packets. */ + uip_stats_t sent; /**< Number of sent ICMP packets. */ + uip_stats_t drop; /**< Number of dropped ICMP packets. */ + uip_stats_t typeerr; /**< Number of ICMP packets with a wrong type. */ + uip_stats_t chkerr; /**< Number of ICMP packets with a bad checksum. */ + } icmp; /**< ICMP statistics. */ +#if UIP_TCP + struct { + uip_stats_t recv; /**< Number of recived TCP segments. */ + uip_stats_t sent; /**< Number of sent TCP segments. */ + uip_stats_t drop; /**< Number of dropped TCP segments. */ + uip_stats_t chkerr; /**< Number of TCP segments with a bad checksum. */ + uip_stats_t ackerr; /**< Number of TCP segments with a bad ACK number. */ + uip_stats_t rst; /**< Number of received TCP RST (reset) segments. */ + uip_stats_t rexmit; /**< Number of retransmitted TCP segments. */ + uip_stats_t syndrop; /**< Number of dropped SYNs because too few + connections were available. */ + uip_stats_t synrst; /**< Number of SYNs for closed ports, + triggering a RST. */ + } tcp; /**< TCP statistics. */ +#endif +#if UIP_UDP + struct { + uip_stats_t drop; /**< Number of dropped UDP segments. */ + uip_stats_t recv; /**< Number of recived UDP segments. */ + uip_stats_t sent; /**< Number of sent UDP segments. */ + uip_stats_t chkerr; /**< Number of UDP segments with a bad + checksum. */ + } udp; /**< UDP statistics. */ +#endif /* UIP_UDP */ +#if NETSTACK_CONF_WITH_IPV6 + struct { + uip_stats_t drop; /**< Number of dropped ND6 packets. */ + uip_stats_t recv; /**< Number of recived ND6 packets */ + uip_stats_t sent; /**< Number of sent ND6 packets */ + } nd6; +#endif /*NETSTACK_CONF_WITH_IPV6*/ +}; + + +/*---------------------------------------------------------------------------*/ +/* All the stuff below this point is internal to uIP and should not be + * used directly by an application or by a device driver. + */ +/*---------------------------------------------------------------------------*/ + + + +/* uint8_t uip_flags: + * + * When the application is called, uip_flags will contain the flags + * that are defined in this file. Please read below for more + * information. + */ +CCIF extern uint8_t uip_flags; + +/* The following flags may be set in the global variable uip_flags + before calling the application callback. The UIP_ACKDATA, + UIP_NEWDATA, and UIP_CLOSE flags may both be set at the same time, + whereas the others are mutually exclusive. Note that these flags + should *NOT* be accessed directly, but only through the uIP + functions/macros. */ + +#define UIP_ACKDATA 1 /* Signifies that the outstanding data was + acked and the application should send + out new data instead of retransmitting + the last data. */ +#define UIP_NEWDATA 2 /* Flags the fact that the peer has sent + us new data. */ +#define UIP_REXMIT 4 /* Tells the application to retransmit the + data that was last sent. */ +#define UIP_POLL 8 /* Used for polling the application, to + check if the application has data that + it wants to send. */ +#define UIP_CLOSE 16 /* The remote host has closed the + connection, thus the connection has + gone away. Or the application signals + that it wants to close the + connection. */ +#define UIP_ABORT 32 /* The remote host has aborted the + connection, thus the connection has + gone away. Or the application signals + that it wants to abort the + connection. */ +#define UIP_CONNECTED 64 /* We have got a connection from a remote + host and have set up a new connection + for it, or an active connection has + been successfully established. */ + +#define UIP_TIMEDOUT 128 /* The connection has been aborted due to + too many retransmissions. */ + + +/** + * \brief process the options within a hop by hop or destination option header + * \retval 0: nothing to send, + * \retval 1: drop pkt + * \retval 2: ICMP error message to send +*/ +/*static uint8_t +uip_ext_hdr_options_process(); */ + +/* uip_process(flag): + * + * The actual uIP function which does all the work. + */ +void uip_process(uint8_t flag); + + /* The following flags are passed as an argument to the uip_process() + function. They are used to distinguish between the two cases where + uip_process() is called. It can be called either because we have + incoming data that should be processed, or because the periodic + timer has fired. These values are never used directly, but only in + the macros defined in this file. */ + +#define UIP_DATA 1 /* Tells uIP that there is incoming + data in the uip_buf buffer. The + length of the data is stored in the + global variable uip_len. */ +#define UIP_TIMER 2 /* Tells uIP that the periodic timer + has fired. */ +#define UIP_POLL_REQUEST 3 /* Tells uIP that a connection should + be polled. */ +#define UIP_UDP_SEND_CONN 4 /* Tells uIP that a UDP datagram + should be constructed in the + uip_buf buffer. */ +#if UIP_UDP +#define UIP_UDP_TIMER 5 +#endif /* UIP_UDP */ + +/* The TCP states used in the uip_conn->tcpstateflags. */ +#define UIP_CLOSED 0 +#define UIP_SYN_RCVD 1 +#define UIP_SYN_SENT 2 +#define UIP_ESTABLISHED 3 +#define UIP_FIN_WAIT_1 4 +#define UIP_FIN_WAIT_2 5 +#define UIP_CLOSING 6 +#define UIP_TIME_WAIT 7 +#define UIP_LAST_ACK 8 +#define UIP_TS_MASK 15 + +#define UIP_STOPPED 16 + +/* The TCP and IP headers. */ +struct uip_tcpip_hdr { +#if NETSTACK_CONF_WITH_IPV6 + /* IPv6 header. */ + uint8_t vtc, + tcflow; + uint16_t flow; + uint8_t len[2]; + uint8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* NETSTACK_CONF_WITH_IPV6 */ + /* IPv4 header. */ + uint8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + uint16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + /* TCP header. */ + uint16_t srcport, + destport; + uint8_t seqno[4], + ackno[4], + tcpoffset, + flags, + wnd[2]; + uint16_t tcpchksum; + uint8_t urgp[2]; + uint8_t optdata[4]; +}; + +/* The ICMP and IP headers. */ +struct uip_icmpip_hdr { +#if NETSTACK_CONF_WITH_IPV6 + /* IPv6 header. */ + uint8_t vtc, + tcf; + uint16_t flow; + uint8_t len[2]; + uint8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* NETSTACK_CONF_WITH_IPV6 */ + /* IPv4 header. */ + uint8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + uint16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + /* ICMP header. */ + uint8_t type, icode; + uint16_t icmpchksum; +#if !NETSTACK_CONF_WITH_IPV6 + uint16_t id, seqno; + uint8_t payload[1]; +#endif /* !NETSTACK_CONF_WITH_IPV6 */ +}; + + +/* The UDP and IP headers. */ +struct uip_udpip_hdr { +#if NETSTACK_CONF_WITH_IPV6 + /* IPv6 header. */ + uint8_t vtc, + tcf; + uint16_t flow; + uint8_t len[2]; + uint8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* NETSTACK_CONF_WITH_IPV6 */ + /* IP header. */ + uint8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + uint16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + /* UDP header. */ + uint16_t srcport, + destport; + uint16_t udplen; + uint16_t udpchksum; +}; + +/* + * In IPv6 the length of the L3 headers before the transport header is + * not fixed, due to the possibility to include extension option headers + * after the IP header. hence we split here L3 and L4 headers + */ +/* The IP header */ +struct uip_ip_hdr { +#if NETSTACK_CONF_WITH_IPV6 + /* IPV6 header */ + uint8_t vtc; + uint8_t tcflow; + uint16_t flow; + uint8_t len[2]; + uint8_t proto, ttl; + uip_ip6addr_t srcipaddr, destipaddr; +#else /* NETSTACK_CONF_WITH_IPV6 */ + /* IPV4 header */ + uint8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + uint16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +#endif /* NETSTACK_CONF_WITH_IPV6 */ +}; + + +/* + * IPv6 extension option headers: we are able to process + * the 4 extension headers defined in RFC2460 (IPv6): + * - Hop by hop option header, destination option header: + * These two are not used by any core IPv6 protocol, hence + * we just read them and go to the next. They convey options, + * the options defined in RFC2460 are Pad1 and PadN, which do + * some padding, and that we do not need to read (the length + * field in the header is enough) + * - Routing header: this one is most notably used by MIPv6, + * which we do not implement, hence we just read it and go + * to the next + * - Fragmentation header: we read this header and are able to + * reassemble packets + * + * We do not offer any means to send packets with extension headers + * + * We do not implement Authentication and ESP headers, which are + * used in IPSec and defined in RFC4302,4303,4305,4385 + */ +/* common header part */ +typedef struct uip_ext_hdr { + uint8_t next; + uint8_t len; +} uip_ext_hdr; + +/* Hop by Hop option header */ +typedef struct uip_hbho_hdr { + uint8_t next; + uint8_t len; +} uip_hbho_hdr; + +/* destination option header */ +typedef struct uip_desto_hdr { + uint8_t next; + uint8_t len; +} uip_desto_hdr; + +/* We do not define structures for PAD1 and PADN options */ + +/* + * routing header + * the routing header as 4 common bytes, then routing header type + * specific data there are several types of routing header. Type 0 was + * deprecated as per RFC5095 most notable other type is 2, used in + * RFC3775 (MIPv6) here we do not implement MIPv6, so we just need to + * parse the 4 first bytes + */ +typedef struct uip_routing_hdr { + uint8_t next; + uint8_t len; + uint8_t routing_type; + uint8_t seg_left; +} uip_routing_hdr; + +/* RPL Source Routing Header */ +typedef struct uip_rpl_srh_hdr { + uint8_t cmpr; /* CmprI and CmprE */ + uint8_t pad; + uint8_t reserved[2]; +} uip_rpl_srh_hdr; + +/* fragmentation header */ +typedef struct uip_frag_hdr { + uint8_t next; + uint8_t res; + uint16_t offsetresmore; + uint32_t id; +} uip_frag_hdr; + +/* + * an option within the destination or hop by hop option headers + * it contains type an length, which is true for all options but PAD1 + */ +typedef struct uip_ext_hdr_opt { + uint8_t type; + uint8_t len; +} uip_ext_hdr_opt; + +/* PADN option */ +typedef struct uip_ext_hdr_opt_padn { + uint8_t opt_type; + uint8_t opt_len; +} uip_ext_hdr_opt_padn; + +/* RPL option */ +typedef struct uip_ext_hdr_opt_rpl { + uint8_t opt_type; + uint8_t opt_len; + uint8_t flags; + uint8_t instance; + uint16_t senderrank; +} uip_ext_hdr_opt_rpl; + +/* TCP header */ +struct uip_tcp_hdr { + uint16_t srcport; + uint16_t destport; + uint8_t seqno[4]; + uint8_t ackno[4]; + uint8_t tcpoffset; + uint8_t flags; + uint8_t wnd[2]; + uint16_t tcpchksum; + uint8_t urgp[2]; + uint8_t optdata[4]; +}; + +/* The ICMP headers. */ +struct uip_icmp_hdr { + uint8_t type, icode; + uint16_t icmpchksum; +#if !NETSTACK_CONF_WITH_IPV6 + uint16_t id, seqno; +#endif /* !NETSTACK_CONF_WITH_IPV6 */ +}; + + +/* The UDP headers. */ +struct uip_udp_hdr { + uint16_t srcport; + uint16_t destport; + uint16_t udplen; + uint16_t udpchksum; +}; + + +/** + * The buffer size available for user data in the \ref uip_buf buffer. + * + * This macro holds the available size for user data in the \ref + * uip_buf buffer. The macro is intended to be used for checking + * bounds of available user data. + * + * Example: + \code + snprintf(uip_appdata, UIP_APPDATA_SIZE, "%u\n", i); + \endcode + * + * \hideinitializer + */ +#define UIP_APPDATA_SIZE (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN) +#define UIP_APPDATA_PTR (void *)&uip_buf[UIP_LLH_LEN + UIP_TCPIP_HLEN] + +#define UIP_PROTO_ICMP 1 +#define UIP_PROTO_TCP 6 +#define UIP_PROTO_UDP 17 +#define UIP_PROTO_ICMP6 58 + + +#if NETSTACK_CONF_WITH_IPV6 +/** @{ */ +/** \brief extension headers types */ +#define UIP_PROTO_HBHO 0 +#define UIP_PROTO_DESTO 60 +#define UIP_PROTO_ROUTING 43 +#define UIP_PROTO_FRAG 44 +#define UIP_PROTO_NONE 59 +/** @} */ + +/** @{ */ +/** \brief Destination and Hop By Hop extension headers option types */ +#define UIP_EXT_HDR_OPT_PAD1 0 +#define UIP_EXT_HDR_OPT_PADN 1 +#define UIP_EXT_HDR_OPT_RPL 0x63 + +/** @} */ + +/** @{ */ +/** + * \brief Bitmaps for extension header processing + * + * When processing extension headers, we should record somehow which one we + * see, because you cannot have twice the same header, except for destination + * We store all this in one uint8_t bitmap one bit for each header expected. The + * order in the bitmap is the order recommended in RFC2460 + */ +#define UIP_EXT_HDR_BITMAP_HBHO 0x01 +#define UIP_EXT_HDR_BITMAP_DESTO1 0x02 +#define UIP_EXT_HDR_BITMAP_ROUTING 0x04 +#define UIP_EXT_HDR_BITMAP_FRAG 0x08 +#define UIP_EXT_HDR_BITMAP_AH 0x10 +#define UIP_EXT_HDR_BITMAP_ESP 0x20 +#define UIP_EXT_HDR_BITMAP_DESTO2 0x40 +/** @} */ + + +#endif /* NETSTACK_CONF_WITH_IPV6 */ + + +#if UIP_FIXEDADDR +CCIF extern const uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr; +#else /* UIP_FIXEDADDR */ +CCIF extern uip_ipaddr_t uip_hostaddr, uip_netmask, uip_draddr; +#endif /* UIP_FIXEDADDR */ +CCIF extern const uip_ipaddr_t uip_broadcast_addr; +CCIF extern const uip_ipaddr_t uip_all_zeroes_addr; + +#if UIP_FIXEDETHADDR +CCIF extern const uip_lladdr_t uip_lladdr; +#else +CCIF extern uip_lladdr_t uip_lladdr; +#endif + + + + +#if NETSTACK_CONF_WITH_IPV6 +/** Length of the link local prefix */ +#define UIP_LLPREF_LEN 10 + +/** + * \brief Is IPv6 address a the unspecified address + * a is of type uip_ipaddr_t + */ +#define uip_is_addr_loopback(a) \ + ((((a)->u16[0]) == 0) && \ + (((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 0x01)) +/** + * \brief Is IPv6 address a the unspecified address + * a is of type uip_ipaddr_t + */ +#define uip_is_addr_unspecified(a) \ + ((((a)->u16[0]) == 0) && \ + (((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u16[7]) == 0)) + +/** \brief Is IPv6 address a the link local all-nodes multicast address */ +#define uip_is_addr_linklocal_allnodes_mcast(a) \ + ((((a)->u8[0]) == 0xff) && \ + (((a)->u8[1]) == 0x02) && \ + (((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 0x01)) + +/** \brief Is IPv6 address a the link local all-routers multicast address */ +#define uip_is_addr_linklocal_allrouters_mcast(a) \ + ((((a)->u8[0]) == 0xff) && \ + (((a)->u8[1]) == 0x02) && \ + (((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 0x02)) + +/** + * \brief is addr (a) a link local unicast address, see RFC3513 + * i.e. is (a) on prefix FE80::/10 + * a is of type uip_ipaddr_t* + */ +#define uip_is_addr_linklocal(a) \ + ((a)->u8[0] == 0xfe && \ + (a)->u8[1] == 0x80) + +/** \brief set IP address a to unspecified */ +#define uip_create_unspecified(a) uip_ip6addr(a, 0, 0, 0, 0, 0, 0, 0, 0) + +/** \brief set IP address a to the link local all-nodes multicast address */ +#define uip_create_linklocal_allnodes_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0001) + +/** \brief set IP address a to the link local all-routers multicast address */ +#define uip_create_linklocal_allrouters_mcast(a) uip_ip6addr(a, 0xff02, 0, 0, 0, 0, 0, 0, 0x0002) +#define uip_create_linklocal_prefix(addr) do { \ + (addr)->u16[0] = UIP_HTONS(0xfe80); \ + (addr)->u16[1] = 0; \ + (addr)->u16[2] = 0; \ + (addr)->u16[3] = 0; \ + } while(0) + +/** + * \brief is addr (a) a solicited node multicast address, see RFC3513 + * a is of type uip_ipaddr_t* + */ +#define uip_is_addr_solicited_node(a) \ + ((((a)->u8[0]) == 0xFF) && \ + (((a)->u8[1]) == 0x02) && \ + (((a)->u16[1]) == 0x00) && \ + (((a)->u16[2]) == 0x00) && \ + (((a)->u16[3]) == 0x00) && \ + (((a)->u16[4]) == 0x00) && \ + (((a)->u8[10]) == 0x00) && \ + (((a)->u8[11]) == 0x01) && \ + (((a)->u8[12]) == 0xFF)) + +/** + * \brief put in b the solicited node address corresponding to address a + * both a and b are of type uip_ipaddr_t* + * */ +#define uip_create_solicited_node(a, b) \ + (((b)->u8[0]) = 0xFF); \ + (((b)->u8[1]) = 0x02); \ + (((b)->u16[1]) = 0); \ + (((b)->u16[2]) = 0); \ + (((b)->u16[3]) = 0); \ + (((b)->u16[4]) = 0); \ + (((b)->u8[10]) = 0); \ + (((b)->u8[11]) = 0x01); \ + (((b)->u8[12]) = 0xFF); \ + (((b)->u8[13]) = ((a)->u8[13])); \ + (((b)->u16[7]) = ((a)->u16[7])) + +/** + * \brief was addr (a) forged based on the mac address m + * a type is uip_ipaddr_t + * m type is uiplladdr_t + */ +#if UIP_CONF_LL_802154 +#define uip_is_addr_mac_addr_based(a, m) \ + ((((a)->u8[8]) == (((m)->addr[0]) ^ 0x02)) && \ + (((a)->u8[9]) == (m)->addr[1]) && \ + (((a)->u8[10]) == (m)->addr[2]) && \ + (((a)->u8[11]) == (m)->addr[3]) && \ + (((a)->u8[12]) == (m)->addr[4]) && \ + (((a)->u8[13]) == (m)->addr[5]) && \ + (((a)->u8[14]) == (m)->addr[6]) && \ + (((a)->u8[15]) == (m)->addr[7])) +#else + +#define uip_is_addr_mac_addr_based(a, m) \ + ((((a)->u8[8]) == (((m)->addr[0]) | 0x02)) && \ + (((a)->u8[9]) == (m)->addr[1]) && \ + (((a)->u8[10]) == (m)->addr[2]) && \ + (((a)->u8[11]) == 0xff) && \ + (((a)->u8[12]) == 0xfe) && \ + (((a)->u8[13]) == (m)->addr[3]) && \ + (((a)->u8[14]) == (m)->addr[4]) && \ + (((a)->u8[15]) == (m)->addr[5])) + +#endif /*UIP_CONF_LL_802154*/ + +/** + * \brief is address a multicast address, see RFC 3513 + * a is of type uip_ipaddr_t* + * */ +#define uip_is_addr_mcast(a) \ + (((a)->u8[0]) == 0xFF) + +/** + * \brief is address a global multicast address (FFxE::/16), + * a is of type uip_ip6addr_t* + * */ +#define uip_is_addr_mcast_global(a) \ + ((((a)->u8[0]) == 0xFF) && \ + (((a)->u8[1] & 0x0F) == 0x0E)) + +/** + * \brief is address a non-routable multicast address. + * Scopes 1 (interface-local) and 2 (link-local) are non-routable + * See RFC4291 and draft-ietf-6man-multicast-scopes + * a is of type uip_ip6addr_t* + * */ +#define uip_is_addr_mcast_non_routable(a) \ + ((((a)->u8[0]) == 0xFF) && \ + (((a)->u8[1] & 0x0F) <= 0x02)) + +/** + * \brief is address a routable multicast address. + * Scope 3 (Realm-Local) or higher are routable + * Realm-Local scope is defined in draft-ietf-6man-multicast-scopes + * See RFC4291 and draft-ietf-6man-multicast-scopes + * a is of type uip_ip6addr_t* + * */ +#define uip_is_addr_mcast_routable(a) \ + ((((a)->u8[0]) == 0xFF) && \ + (((a)->u8[1] & 0x0F) > 0x02)) + +/** + * \brief is group-id of multicast address a + * the all nodes group-id + */ +#define uip_is_mcast_group_id_all_nodes(a) \ + ((((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 1)) + +/** + * \brief is group-id of multicast address a + * the all routers group-id + */ +#define uip_is_mcast_group_id_all_routers(a) \ + ((((a)->u16[1]) == 0) && \ + (((a)->u16[2]) == 0) && \ + (((a)->u16[3]) == 0) && \ + (((a)->u16[4]) == 0) && \ + (((a)->u16[5]) == 0) && \ + (((a)->u16[6]) == 0) && \ + (((a)->u8[14]) == 0) && \ + (((a)->u8[15]) == 2)) + + +/** + * \brief are last three bytes of both addresses equal? + * This is used to compare solicited node multicast addresses + */ +#define uip_are_solicited_bytes_equal(a, b) \ + ((((a)->u8[13]) == ((b)->u8[13])) && \ + (((a)->u8[14]) == ((b)->u8[14])) && \ + (((a)->u8[15]) == ((b)->u8[15]))) + +#endif /*NETSTACK_CONF_WITH_IPV6*/ + +/** + * Calculate the Internet checksum over a buffer. + * + * The Internet checksum is the one's complement of the one's + * complement sum of all 16-bit words in the buffer. + * + * See RFC1071. + * + * \param data A pointer to the buffer over which the checksum is to be + * computed. + * + * \param len The length of the buffer over which the checksum is to + * be computed. + * + * \return The Internet checksum of the buffer. + */ +uint16_t uip_chksum(uint16_t *data, uint16_t len); + +/** + * Calculate the IP header checksum of the packet header in uip_buf. + * + * The IP header checksum is the Internet checksum of the 20 bytes of + * the IP header. + * + * \return The IP header checksum of the IP header in the uip_buf + * buffer. + */ +uint16_t uip_ipchksum(void); + +/** + * Calculate the TCP checksum of the packet in uip_buf and uip_appdata. + * + * The TCP checksum is the Internet checksum of data contents of the + * TCP segment, and a pseudo-header as defined in RFC793. + * + * \return The TCP checksum of the TCP segment in uip_buf and pointed + * to by uip_appdata. + */ +uint16_t uip_tcpchksum(void); + +/** + * Calculate the UDP checksum of the packet in uip_buf and uip_appdata. + * + * The UDP checksum is the Internet checksum of data contents of the + * UDP segment, and a pseudo-header as defined in RFC768. + * + * \return The UDP checksum of the UDP segment in uip_buf and pointed + * to by uip_appdata. + */ +uint16_t uip_udpchksum(void); + +/** + * Calculate the ICMP checksum of the packet in uip_buf. + * + * \return The ICMP checksum of the ICMP packet in uip_buf + */ +uint16_t uip_icmp6chksum(void); + + +#endif /* UIP_H_ */ + + +/** @} */ diff --git a/Applications/netd/uip_arch.h b/Applications/netd/uip_arch.h new file mode 100644 index 00000000..ca60c0e5 --- /dev/null +++ b/Applications/netd/uip_arch.h @@ -0,0 +1,137 @@ +/* + * Copyright (c) 2001, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * + */ + +/** + * \file + * Declarations of architecture specific functions. + * \author Adam Dunkels + */ + +/** + * \addtogroup uip + * {@ + */ + +/** + * \defgroup uiparch Architecture specific uIP functions + * @{ + * + * The functions in the architecture specific module implement the IP + * check sum and 32-bit additions. + * + * The IP checksum calculation is the most computationally expensive + * operation in the TCP/IP stack and it therefore pays off to + * implement this in efficient assembler. The purpose of the uip-arch + * module is to let the checksum functions to be implemented in + * architecture specific assembler. + * + */ + +#ifndef UIP_ARCH_H_ +#define UIP_ARCH_H_ + +#include "uip.h" + +/** + * Carry out a 32-bit addition. + * + * Because not all architectures for which uIP is intended has native + * 32-bit arithmetic, uIP uses an external C function for doing the + * required 32-bit additions in the TCP protocol processing. This + * function should add the two arguments and place the result in the + * global variable uip_acc32. + * + * \note The 32-bit integer pointed to by the op32 parameter and the + * result in the uip_acc32 variable are in network byte order (big + * endian). + * + * \param op32 A pointer to a 4-byte array representing a 32-bit + * integer in network byte order (big endian). + * + * \param op16 A 16-bit integer in host byte order. + */ +void uip_add32(uint8_t *op32, uint16_t op16); + +/** + * Calculate the Internet checksum over a buffer. + * + * The Internet checksum is the one's complement of the one's + * complement sum of all 16-bit words in the buffer. + * + * See RFC1071. + * + * \note This function is not called in the current version of uIP, + * but future versions might make use of it. + * + * \param data A pointer to the buffer over which the checksum is to be + * computed. + * + * \param len The length of the buffer over which the checksum is to + * be computed. + * + * \return The Internet checksum of the buffer. + */ +uint16_t uip_chksum(uint16_t *data, uint16_t len); + +/** + * Calculate the IP header checksum of the packet header in uip_buf. + * + * The IP header checksum is the Internet checksum of the 20 bytes of + * the IP header. + * + * \return The IP header checksum of the IP header in the uip_buf + * buffer. + */ +uint16_t uip_ipchksum(void); + +/** + * Calculate the TCP checksum of the packet in uip_buf and uip_appdata. + * + * The TCP checksum is the Internet checksum of data contents of the + * TCP segment, and a pseudo-header as defined in RFC793. + * + * \note The uip_appdata pointer that points to the packet data may + * point anywhere in memory, so it is not possible to simply calculate + * the Internet checksum of the contents of the uip_buf buffer. + * + * \return The TCP checksum of the TCP segment in uip_buf and pointed + * to by uip_appdata. + */ +uint16_t uip_tcpchksum(void); + +uint16_t uip_udpchksum(void); + +/** @} */ +/** @} */ + +#endif /* UIP_ARCH_H_ */ diff --git a/Applications/netd/uip_arp.c b/Applications/netd/uip_arp.c new file mode 100644 index 00000000..7aa02fb5 --- /dev/null +++ b/Applications/netd/uip_arp.c @@ -0,0 +1,440 @@ +/* + * Copyright (c) 2001-2003, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * + */ + +/** + * \file + * Implementation of the ARP Address Resolution Protocol. + * \author Adam Dunkels + * + */ + +/** + * \addtogroup uip + * @{ + */ + +/** + * \defgroup uiparp uIP Address Resolution Protocol + * @{ + * + * The Address Resolution Protocol ARP is used for mapping between IP + * addresses and link level addresses such as the Ethernet MAC + * addresses. ARP uses broadcast queries to ask for the link level + * address of a known IP address and the host which is configured with + * the IP address for which the query was meant, will respond with its + * link level address. + * + * \note This ARP implementation only supports Ethernet. + */ + +#include "uip_arp.h" + +#include + +struct arp_hdr { + struct uip_eth_hdr ethhdr; + uint16_t hwtype; + uint16_t protocol; + uint8_t hwlen; + uint8_t protolen; + uint16_t opcode; + struct uip_eth_addr shwaddr; + uip_ipaddr_t sipaddr; + struct uip_eth_addr dhwaddr; + uip_ipaddr_t dipaddr; +}; + +struct ethip_hdr { + struct uip_eth_hdr ethhdr; + /* IP header. */ + uint8_t vhl, + tos, + len[2], + ipid[2], + ipoffset[2], + ttl, + proto; + uint16_t ipchksum; + uip_ipaddr_t srcipaddr, destipaddr; +}; + +#define ARP_REQUEST 1 +#define ARP_REPLY 2 + +#define ARP_HWTYPE_ETH 1 + +struct arp_entry { + uip_ipaddr_t ipaddr; + struct uip_eth_addr ethaddr; + uint8_t time; +}; + +static const struct uip_eth_addr broadcast_ethaddr = + {{0xff,0xff,0xff,0xff,0xff,0xff}}; + +static struct arp_entry arp_table[UIP_ARPTAB_SIZE]; +static uip_ipaddr_t ipaddr; +static uint8_t i, c; + +static uint8_t arptime; +static uint8_t tmpage; + +#define BUF ((struct arp_hdr *)&uip_buf[0]) +#define IPBUF ((struct ethip_hdr *)&uip_buf[0]) + +#define DEBUG 0 +#if DEBUG +#include +#define PRINTF(...) printf(__VA_ARGS__) +#else +#define PRINTF(...) +#endif + +/*-----------------------------------------------------------------------------------*/ +/** + * Initialize the ARP module. + * + */ +/*-----------------------------------------------------------------------------------*/ +void +uip_arp_init(void) +{ + for(i = 0; i < UIP_ARPTAB_SIZE; ++i) { + memset(&arp_table[i].ipaddr, 0, 4); + } +} +/*-----------------------------------------------------------------------------------*/ +/** + * Periodic ARP processing function. + * + * This function performs periodic timer processing in the ARP module + * and should be called at regular intervals. The recommended interval + * is 10 seconds between the calls. + * + */ +/*-----------------------------------------------------------------------------------*/ +void +uip_arp_timer(void) +{ + struct arp_entry *tabptr; + + ++arptime; + for(i = 0; i < UIP_ARPTAB_SIZE; ++i) { + tabptr = &arp_table[i]; + if(uip_ipaddr_cmp(&tabptr->ipaddr, &uip_all_zeroes_addr) && + arptime - tabptr->time >= UIP_ARP_MAXAGE) { + memset(&tabptr->ipaddr, 0, 4); + } + } + +} + +/*-----------------------------------------------------------------------------------*/ +static void +uip_arp_update(uip_ipaddr_t *ipaddr, struct uip_eth_addr *ethaddr) +{ + register struct arp_entry *tabptr = arp_table; + + /* Walk through the ARP mapping table and try to find an entry to + update. If none is found, the IP -> MAC address mapping is + inserted in the ARP table. */ + for(i = 0; i < UIP_ARPTAB_SIZE; ++i) { + tabptr = &arp_table[i]; + + /* Only check those entries that are actually in use. */ + if(!uip_ipaddr_cmp(&tabptr->ipaddr, &uip_all_zeroes_addr)) { + + /* Check if the source IP address of the incoming packet matches + the IP address in this ARP table entry. */ + if(uip_ipaddr_cmp(ipaddr, &tabptr->ipaddr)) { + + /* An old entry found, update this and return. */ + memcpy(tabptr->ethaddr.addr, ethaddr->addr, 6); + tabptr->time = arptime; + + return; + } + } + tabptr++; + } + + /* If we get here, no existing ARP table entry was found, so we + create one. */ + + /* First, we try to find an unused entry in the ARP table. */ + for(i = 0; i < UIP_ARPTAB_SIZE; ++i) { + tabptr = &arp_table[i]; + if(uip_ipaddr_cmp(&tabptr->ipaddr, &uip_all_zeroes_addr)) { + break; + } + } + + /* If no unused entry is found, we try to find the oldest entry and + throw it away. */ + if(i == UIP_ARPTAB_SIZE) { + tmpage = 0; + c = 0; + for(i = 0; i < UIP_ARPTAB_SIZE; ++i) { + tabptr = &arp_table[i]; + if(arptime - tabptr->time > tmpage) { + tmpage = arptime - tabptr->time; + c = i; + } + } + i = c; + tabptr = &arp_table[i]; + } + + /* Now, i is the ARP table entry which we will fill with the new + information. */ + uip_ipaddr_copy(&tabptr->ipaddr, ipaddr); + memcpy(tabptr->ethaddr.addr, ethaddr->addr, 6); + tabptr->time = arptime; +} +/*-----------------------------------------------------------------------------------*/ +/** + * ARP processing for incoming IP packets + * + * This function should be called by the device driver when an IP + * packet has been received. The function will check if the address is + * in the ARP cache, and if so the ARP cache entry will be + * refreshed. If no ARP cache entry was found, a new one is created. + * + * This function expects an IP packet with a prepended Ethernet header + * in the uip_buf[] buffer, and the length of the packet in the global + * variable uip_len. + */ +/*-----------------------------------------------------------------------------------*/ +#if 0 +void +uip_arp_ipin(void) +{ + uip_len -= sizeof(struct uip_eth_hdr); + + /* Only insert/update an entry if the source IP address of the + incoming IP packet comes from a host on the local network. */ + if((IPBUF->srcipaddr[0] & uip_netmask[0]) != + (uip_hostaddr[0] & uip_netmask[0])) { + return; + } + if((IPBUF->srcipaddr[1] & uip_netmask[1]) != + (uip_hostaddr[1] & uip_netmask[1])) { + return; + } + uip_arp_update(IPBUF->srcipaddr, &(IPBUF->ethhdr.src)); + + return; +} +#endif /* 0 */ +/*-----------------------------------------------------------------------------------*/ +/** + * ARP processing for incoming ARP packets. + * + * This function should be called by the device driver when an ARP + * packet has been received. The function will act differently + * depending on the ARP packet type: if it is a reply for a request + * that we previously sent out, the ARP cache will be filled in with + * the values from the ARP reply. If the incoming ARP packet is an ARP + * request for our IP address, an ARP reply packet is created and put + * into the uip_buf[] buffer. + * + * When the function returns, the value of the global variable uip_len + * indicates whether the device driver should send out a packet or + * not. If uip_len is zero, no packet should be sent. If uip_len is + * non-zero, it contains the length of the outbound packet that is + * present in the uip_buf[] buffer. + * + * This function expects an ARP packet with a prepended Ethernet + * header in the uip_buf[] buffer, and the length of the packet in the + * global variable uip_len. + */ +/*-----------------------------------------------------------------------------------*/ +void +uip_arp_arpin(void) +{ + + if(uip_len < sizeof(struct arp_hdr)) { + uip_clear_buf(); + return; + } + uip_clear_buf(); + + switch(BUF->opcode) { + case UIP_HTONS(ARP_REQUEST): + /* ARP request. If it asked for our address, we send out a + reply. */ + /* if(BUF->dipaddr[0] == uip_hostaddr[0] && + BUF->dipaddr[1] == uip_hostaddr[1]) {*/ + PRINTF("uip_arp_arpin: request for %d.%d.%d.%d (we are %d.%d.%d.%d)\n", + BUF->dipaddr.u8[0], BUF->dipaddr.u8[1], + BUF->dipaddr.u8[2], BUF->dipaddr.u8[3], + uip_hostaddr.u8[0], uip_hostaddr.u8[1], + uip_hostaddr.u8[2], uip_hostaddr.u8[3]); + if(uip_ipaddr_cmp(&BUF->dipaddr, &uip_hostaddr)) { + /* First, we register the one who made the request in our ARP + table, since it is likely that we will do more communication + with this host in the future. */ + uip_arp_update(&BUF->sipaddr, &BUF->shwaddr); + + BUF->opcode = UIP_HTONS(ARP_REPLY); + + memcpy(BUF->dhwaddr.addr, BUF->shwaddr.addr, 6); + memcpy(BUF->shwaddr.addr, uip_lladdr.addr, 6); + memcpy(BUF->ethhdr.src.addr, uip_lladdr.addr, 6); + memcpy(BUF->ethhdr.dest.addr, BUF->dhwaddr.addr, 6); + + uip_ipaddr_copy(&BUF->dipaddr, &BUF->sipaddr); + uip_ipaddr_copy(&BUF->sipaddr, &uip_hostaddr); + + BUF->ethhdr.type = UIP_HTONS(UIP_ETHTYPE_ARP); + uip_len = sizeof(struct arp_hdr); + } + break; + case UIP_HTONS(ARP_REPLY): + /* ARP reply. We insert or update the ARP table if it was meant + for us. */ + if(uip_ipaddr_cmp(&BUF->dipaddr, &uip_hostaddr)) { + uip_arp_update(&BUF->sipaddr, &BUF->shwaddr); + } + break; + } + + return; +} +/*-----------------------------------------------------------------------------------*/ +/** + * Prepend Ethernet header to an outbound IP packet and see if we need + * to send out an ARP request. + * + * This function should be called before sending out an IP packet. The + * function checks the destination IP address of the IP packet to see + * what Ethernet MAC address that should be used as a destination MAC + * address on the Ethernet. + * + * If the destination IP address is in the local network (determined + * by logical ANDing of netmask and our IP address), the function + * checks the ARP cache to see if an entry for the destination IP + * address is found. If so, an Ethernet header is prepended and the + * function returns. If no ARP cache entry is found for the + * destination IP address, the packet in the uip_buf[] is replaced by + * an ARP request packet for the IP address. The IP packet is dropped + * and it is assumed that they higher level protocols (e.g., TCP) + * eventually will retransmit the dropped packet. + * + * If the destination IP address is not on the local network, the IP + * address of the default router is used instead. + * + * When the function returns, a packet is present in the uip_buf[] + * buffer, and the length of the packet is in the global variable + * uip_len. + */ +/*-----------------------------------------------------------------------------------*/ +void +uip_arp_out(void) +{ + struct arp_entry *tabptr = arp_table; + + /* Find the destination IP address in the ARP table and construct + the Ethernet header. If the destination IP addres isn't on the + local network, we use the default router's IP address instead. + + If not ARP table entry is found, we overwrite the original IP + packet with an ARP request for the IP address. */ + + /* First check if destination is a local broadcast. */ + if(uip_ipaddr_cmp(&IPBUF->destipaddr, &uip_broadcast_addr)) { + memcpy(IPBUF->ethhdr.dest.addr, broadcast_ethaddr.addr, 6); + } else if(IPBUF->destipaddr.u8[0] == 224) { + /* Multicast. */ + IPBUF->ethhdr.dest.addr[0] = 0x01; + IPBUF->ethhdr.dest.addr[1] = 0x00; + IPBUF->ethhdr.dest.addr[2] = 0x5e; + IPBUF->ethhdr.dest.addr[3] = IPBUF->destipaddr.u8[1]; + IPBUF->ethhdr.dest.addr[4] = IPBUF->destipaddr.u8[2]; + IPBUF->ethhdr.dest.addr[5] = IPBUF->destipaddr.u8[3]; + } else { + /* Check if the destination address is on the local network. */ + if(!uip_ipaddr_maskcmp(&IPBUF->destipaddr, &uip_hostaddr, &uip_netmask)) { + /* Destination address was not on the local network, so we need to + use the default router's IP address instead of the destination + address when determining the MAC address. */ + uip_ipaddr_copy(&ipaddr, &uip_draddr); + } else { + /* Else, we use the destination IP address. */ + uip_ipaddr_copy(&ipaddr, &IPBUF->destipaddr); + } + for(i = 0; i < UIP_ARPTAB_SIZE; ++i) { + if(uip_ipaddr_cmp(&ipaddr, &tabptr->ipaddr)) { + break; + } + tabptr++; + } + + if(i == UIP_ARPTAB_SIZE) { + /* The destination address was not in our ARP table, so we + overwrite the IP packet with an ARP request. */ + + memset(BUF->ethhdr.dest.addr, 0xff, 6); + memset(BUF->dhwaddr.addr, 0x00, 6); + memcpy(BUF->ethhdr.src.addr, uip_lladdr.addr, 6); + memcpy(BUF->shwaddr.addr, uip_lladdr.addr, 6); + + uip_ipaddr_copy(&BUF->dipaddr, &ipaddr); + uip_ipaddr_copy(&BUF->sipaddr, &uip_hostaddr); + BUF->opcode = UIP_HTONS(ARP_REQUEST); /* ARP request. */ + BUF->hwtype = UIP_HTONS(ARP_HWTYPE_ETH); + BUF->protocol = UIP_HTONS(UIP_ETHTYPE_IP); + BUF->hwlen = 6; + BUF->protolen = 4; + BUF->ethhdr.type = UIP_HTONS(UIP_ETHTYPE_ARP); + + uip_appdata = &uip_buf[UIP_TCPIP_HLEN + UIP_LLH_LEN]; + + uip_len = sizeof(struct arp_hdr); + return; + } + + /* Build an ethernet header. */ + memcpy(IPBUF->ethhdr.dest.addr, tabptr->ethaddr.addr, 6); + } + memcpy(IPBUF->ethhdr.src.addr, uip_lladdr.addr, 6); + + IPBUF->ethhdr.type = UIP_HTONS(UIP_ETHTYPE_IP); + + uip_len += sizeof(struct uip_eth_hdr); +} +/*-----------------------------------------------------------------------------------*/ + +/** @} */ +/** @} */ + diff --git a/Applications/netd/uip_arp.h b/Applications/netd/uip_arp.h new file mode 100644 index 00000000..7ce67ad2 --- /dev/null +++ b/Applications/netd/uip_arp.h @@ -0,0 +1,142 @@ +/* + * Copyright (c) 2001-2003, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * + */ + +/** + * \file + * Macros and definitions for the ARP module. + * \author Adam Dunkels + */ + +/** + * \addtogroup uip + * @{ + */ + +/** + * \addtogroup uiparp + * @{ + */ + +#ifndef UIP_ARP_H_ +#define UIP_ARP_H_ + +#include "uip.h" + + + +/** + * The Ethernet header. + */ +struct uip_eth_hdr { + struct uip_eth_addr dest; + struct uip_eth_addr src; + uint16_t type; +}; + +#define UIP_ETHTYPE_ARP 0x0806 +#define UIP_ETHTYPE_IP 0x0800 +#define UIP_ETHTYPE_IPV6 0x86dd + + +/* The uip_arp_init() function must be called before any of the other + ARP functions. */ +void uip_arp_init(void); + +/* The uip_arp_ipin() function should be called whenever an IP packet + arrives from the Ethernet. This function refreshes the ARP table or + inserts a new mapping if none exists. The function assumes that an + IP packet with an Ethernet header is present in the uip_buf buffer + and that the length of the packet is in the uip_len variable. */ +/*void uip_arp_ipin(void);*/ +#define uip_arp_ipin() + +/* The uip_arp_arpin() should be called when an ARP packet is received + by the Ethernet driver. This function also assumes that the + Ethernet frame is present in the uip_buf buffer. When the + uip_arp_arpin() function returns, the contents of the uip_buf + buffer should be sent out on the Ethernet if the uip_len variable + is > 0. */ +void uip_arp_arpin(void); + +/* The uip_arp_out() function should be called when an IP packet + should be sent out on the Ethernet. This function creates an + Ethernet header before the IP header in the uip_buf buffer. The + Ethernet header will have the correct Ethernet MAC destination + address filled in if an ARP table entry for the destination IP + address (or the IP address of the default router) is present. If no + such table entry is found, the IP packet is overwritten with an ARP + request and we rely on TCP to retransmit the packet that was + overwritten. In any case, the uip_len variable holds the length of + the Ethernet frame that should be transmitted. */ +void uip_arp_out(void); + +/* The uip_arp_timer() function should be called every ten seconds. It + is responsible for flushing old entries in the ARP table. */ +void uip_arp_timer(void); + +/** @} */ + +/** + * \addtogroup uipconffunc + * @{ + */ + + +/** + * Specifiy the Ethernet MAC address. + * + * The ARP code needs to know the MAC address of the Ethernet card in + * order to be able to respond to ARP queries and to generate working + * Ethernet headers. + * + * \note This macro only specifies the Ethernet MAC address to the ARP + * code. It cannot be used to change the MAC address of the Ethernet + * card. + * + * \param eaddr A pointer to a struct uip_eth_addr containing the + * Ethernet MAC address of the Ethernet card. + * + * \hideinitializer + */ +#define uip_setethaddr(eaddr) do {uip_lladdr.addr[0] = eaddr.addr[0]; \ + uip_lladdr.addr[1] = eaddr.addr[1];\ + uip_lladdr.addr[2] = eaddr.addr[2];\ + uip_lladdr.addr[3] = eaddr.addr[3];\ + uip_lladdr.addr[4] = eaddr.addr[4];\ + uip_lladdr.addr[5] = eaddr.addr[5];} while(0) + +/** @} */ + + +#endif /* UIP_ARP_H_ */ +/** @} */ diff --git a/Applications/netd/uiplib.c b/Applications/netd/uiplib.c new file mode 100644 index 00000000..85be04b7 --- /dev/null +++ b/Applications/netd/uiplib.c @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2004, Adam Dunkels and the Swedish Institute of + * Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack and the Contiki operating system. + * + * + */ + + +#include "uip.h" +#include "uiplib.h" +#include + +#define DEBUG DEBUG_NONE + + +/*-----------------------------------------------------------------------------------*/ +#if NETSTACK_CONF_WITH_IPV6 +int +uiplib_ip6addrconv(const char *addrstr, uip_ip6addr_t *ipaddr) +{ + uint16_t value; + int tmp, zero; + unsigned int len; + char c = 0; //gcc warning if not initialized + + value = 0; + zero = -1; + if(*addrstr == '[') addrstr++; + + for(len = 0; len < sizeof(uip_ip6addr_t) - 1; addrstr++) { + c = *addrstr; + if(c == ':' || c == '\0' || c == ']' || c == '/') { + ipaddr->u8[len] = (value >> 8) & 0xff; + ipaddr->u8[len + 1] = value & 0xff; + len += 2; + value = 0; + + if(c == '\0' || c == ']' || c == '/') { + break; + } + + if(*(addrstr + 1) == ':') { + /* Zero compression */ + if(zero < 0) { + zero = len; + } + addrstr++; + } + } else { + if(c >= '0' && c <= '9') { + tmp = c - '0'; + } else if(c >= 'a' && c <= 'f') { + tmp = c - 'a' + 10; + } else if(c >= 'A' && c <= 'F') { + tmp = c - 'A' + 10; + } else { + PRINTF("uiplib: illegal char: '%c'\n", c); + return 0; + } + value = (value << 4) + (tmp & 0xf); + } + } + if(c != '\0' && c != ']' && c != '/') { + PRINTF("uiplib: too large address\n"); + return 0; + } + if(len < sizeof(uip_ip6addr_t)) { + if(zero < 0) { + PRINTF("uiplib: too short address\n"); + return 0; + } + memmove(&ipaddr->u8[zero + sizeof(uip_ip6addr_t) - len], + &ipaddr->u8[zero], len - zero); + memset(&ipaddr->u8[zero], 0, sizeof(uip_ip6addr_t) - len); + } + + return 1; +} +#endif /* NETSTACK_CONF_WITH_IPV6 */ +/*-----------------------------------------------------------------------------------*/ +/* Parse a IPv4-address from a string. Returns the number of characters read + * for the address. */ +int +uiplib_ip4addrconv(const char *addrstr, uip_ip4addr_t *ipaddr) +{ + unsigned char tmp; + char c; + unsigned char i, j; + uint8_t charsread = 0; + + tmp = 0; + + for(i = 0; i < 4; ++i) { + j = 0; + do { + c = *addrstr; + ++j; + if(j > 4) { + return 0; + } + if(c == '.' || c == 0 || c == ' ') { + ipaddr->u8[i] = tmp; + tmp = 0; + } else if(c >= '0' && c <= '9') { + tmp = (tmp * 10) + (c - '0'); + } else { + return 0; + } + ++addrstr; + ++charsread; + } while(c != '.' && c != 0 && c != ' '); + + } + return charsread-1; +} +/*-----------------------------------------------------------------------------------*/ diff --git a/Applications/netd/uiplib.h b/Applications/netd/uiplib.h new file mode 100644 index 00000000..0110ad28 --- /dev/null +++ b/Applications/netd/uiplib.h @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2002, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the Contiki desktop environment for the C64. + * + * + */ + +/** + * \file + * Various uIP library functions. + * \author + * Adam Dunkels + * + */ + +#ifndef UIPLIB_H_ +#define UIPLIB_H_ + +#include "uip.h" + +/** + * \addtogroup uipconvfunc + * @{ + */ + +/** + * Convert a textual representation of an IP address to a numerical representation. + * + * This function takes a textual representation of an IP address in + * the form a.b.c.d for IPv4 or a:b:c:d:e:f:g:h for IPv6 and converts + * it into a numeric IP address representation that can be used by + * other uIP functions. + * + * \param addrstr A pointer to a string containing the IP address in + * textual form. + * + * \param addr A pointer to a uip_ip4addr_t that will be filled in with + * the numerical representation of the address. + * + * \retval 0 If the IP address could not be parsed. + * \retval Non-zero If the IP address was parsed. + */ +#if NETSTACK_CONF_WITH_IPV6 +#define uiplib_ipaddrconv uiplib_ip6addrconv +#else /* NETSTACK_CONF_WITH_IPV6 */ +#define uiplib_ipaddrconv uiplib_ip4addrconv +#endif /* NETSTACK_CONF_WITH_IPV6 */ + +CCIF int uiplib_ip4addrconv(const char *addrstr, uip_ip4addr_t *addr); +CCIF int uiplib_ip6addrconv(const char *addrstr, uip_ip6addr_t *addr); +/** @} */ + +#endif /* UIPLIB_H_ */ diff --git a/Applications/netd/uipopt.h b/Applications/netd/uipopt.h new file mode 100644 index 00000000..af744cfe --- /dev/null +++ b/Applications/netd/uipopt.h @@ -0,0 +1,684 @@ +/* + * Copyright (c) 2001-2003, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * + */ + +/** + * \file + * Configuration options for uIP. + * \author Adam Dunkels + * + * This file is used for tweaking various configuration options for + * uIP. You should make a copy of this file into one of your project's + * directories instead of editing this example "uipopt.h" file that + * comes with the uIP distribution. + */ + +/** + * \addtogroup uip + * @{ + */ + +/** + * \defgroup uipopt Configuration options for uIP + * @{ + * + * uIP is configured using the per-project configuration file + * "uipopt.h". This file contains all compile-time options for uIP and + * should be tweaked to match each specific project. The uIP + * distribution contains a documented example "uipopt.h" that can be + * copied and modified for each project. + * + * \note Contiki does not use the uipopt.h file to configure uIP, but + * uses a per-port uip-conf.h file that should be edited instead. + */ + +#ifndef UIPOPT_H_ +#define UIPOPT_H_ + +#ifndef UIP_LITTLE_ENDIAN +#define UIP_LITTLE_ENDIAN 3412 +#endif /* UIP_LITTLE_ENDIAN */ +#ifndef UIP_BIG_ENDIAN +#define UIP_BIG_ENDIAN 1234 +#endif /* UIP_BIG_ENDIAN */ + +#include "fuzix-conf.h" + +/*------------------------------------------------------------------------------*/ + +/** + * \defgroup uipoptstaticconf Static configuration options + * @{ + * + * These configuration options can be used for setting the IP address + * settings statically, but only if UIP_FIXEDADDR is set to 1. The + * configuration options for a specific node includes IP address, + * netmask and default router as well as the Ethernet address. The + * netmask, default router and Ethernet address are applicable only + * if uIP should be run over Ethernet. + * + * This options are meaningful only for the IPv4 code. + * + * All of these should be changed to suit your project. + */ + +/** + * Determines if uIP should use a fixed IP address or not. + * + * If uIP should use a fixed IP address, the settings are set in the + * uipopt.h file. If not, the macros uip_sethostaddr(), + * uip_setdraddr() and uip_setnetmask() should be used instead. + * + * \hideinitializer + */ +#define UIP_FIXEDADDR 0 + +/** + * Ping IP address assignment. + * + * uIP uses a "ping" packets for setting its own IP address if this + * option is set. If so, uIP will start with an empty IP address and + * the destination IP address of the first incoming "ping" (ICMP echo) + * packet will be used for setting the hosts IP address. + * + * \note This works only if UIP_FIXEDADDR is 0. + * + * \hideinitializer + */ +#ifdef UIP_CONF_PINGADDRCONF +#define UIP_PINGADDRCONF (UIP_CONF_PINGADDRCONF) +#else /* UIP_CONF_PINGADDRCONF */ +#define UIP_PINGADDRCONF 0 +#endif /* UIP_CONF_PINGADDRCONF */ + + +/** + * Specifies if the uIP ARP module should be compiled with a fixed + * Ethernet MAC address or not. + * + * If this configuration option is 0, the macro uip_setethaddr() can + * be used to specify the Ethernet address at run-time. + * + * \hideinitializer + */ +#define UIP_FIXEDETHADDR 0 + +/** @} */ +/*------------------------------------------------------------------------------*/ + +/** + * \defgroup uipoptgeneral General configuration options + * @{ + */ + +/** + * The link level header length. + * + * This is the offset into the uip_buf where the IP header can be + * found. For Ethernet, this should be set to 14. For SLIP, this + * should be set to 0. + * + * \note we probably won't use this constant for other link layers than + * ethernet as they have variable header length (this is due to variable + * number and type of address fields and to optional security features) + * E.g.: 802.15.4 -> 2 + (1/2*4/8) + 0/5/6/10/14 + * 802.11 -> 4 + (6*3/4) + 2 + * \hideinitializer + */ +#ifdef UIP_CONF_LLH_LEN +#define UIP_LLH_LEN (UIP_CONF_LLH_LEN) +#else /* UIP_LLH_LEN */ +#define UIP_LLH_LEN 0 +#endif /* UIP_CONF_LLH_LEN */ + +/** + * The size of the uIP packet buffer. + * + * The uIP packet buffer should not be smaller than 60 bytes, and does + * not need to be larger than 1514 bytes. Lower size results in lower + * TCP throughput, larger size results in higher TCP throughput. + * + * \hideinitializer + */ +#ifndef UIP_CONF_BUFFER_SIZE +#define UIP_BUFSIZE (UIP_LINK_MTU + UIP_LLH_LEN) +#else /* UIP_CONF_BUFFER_SIZE */ +#define UIP_BUFSIZE (UIP_CONF_BUFFER_SIZE) +#endif /* UIP_CONF_BUFFER_SIZE */ + + +/** + * Determines if statistics support should be compiled in. + * + * The statistics is useful for debugging and to show the user. + * + * \hideinitializer + */ +#ifndef UIP_CONF_STATISTICS +#define UIP_STATISTICS 0 +#else /* UIP_CONF_STATISTICS */ +#define UIP_STATISTICS (UIP_CONF_STATISTICS) +#endif /* UIP_CONF_STATISTICS */ + +/** + * Determines if logging of certain events should be compiled in. + * + * This is useful mostly for debugging. The function uip_log() + * must be implemented to suit the architecture of the project, if + * logging is turned on. + * + * \hideinitializer + */ +#ifndef UIP_CONF_LOGGING +#define UIP_LOGGING 0 +#else /* UIP_CONF_LOGGING */ +#define UIP_LOGGING (UIP_CONF_LOGGING) +#endif /* UIP_CONF_LOGGING */ + +/** + * Broadcast support. + * + * This flag configures IP broadcast support. This is useful only + * together with UDP. + * + * \hideinitializer + * + */ +#ifndef UIP_CONF_BROADCAST +#define UIP_BROADCAST 0 +#else /* UIP_CONF_BROADCAST */ +#define UIP_BROADCAST (UIP_CONF_BROADCAST) +#endif /* UIP_CONF_BROADCAST */ + +/** + * Print out a uIP log message. + * + * This function must be implemented by the module that uses uIP, and + * is called by uIP whenever a log message is generated. + */ +void uip_log(char *msg); + +/** @} */ +/*------------------------------------------------------------------------------*/ +/** + * \defgroup uipoptip IP configuration options + * @{ + * + */ +/** + * The IP TTL (time to live) of IP packets sent by uIP. + * + * This should normally not be changed. + */ +#ifdef UIP_CONF_TTL +#define UIP_TTL UIP_CONF_TTL +#else /* UIP_CONF_TTL */ +#define UIP_TTL 64 +#endif /* UIP_CONF_TTL */ + +/** + * The maximum time an IP fragment should wait in the reassembly + * buffer before it is dropped. + * + */ +#define UIP_REASS_MAXAGE 60 /*60s*/ + +/** + * Turn on support for IP packet reassembly. + * + * uIP supports reassembly of fragmented IP packets. This features + * requires an additional amount of RAM to hold the reassembly buffer + * and the reassembly code size is approximately 700 bytes. The + * reassembly buffer is of the same size as the uip_buf buffer + * (configured by UIP_BUFSIZE). + * + * \note IP packet reassembly is not heavily tested. + * + * \hideinitializer + */ +#ifdef UIP_CONF_REASSEMBLY +#define UIP_REASSEMBLY (UIP_CONF_REASSEMBLY) +#else /* UIP_CONF_REASSEMBLY */ +#define UIP_REASSEMBLY 0 +#endif /* UIP_CONF_REASSEMBLY */ +/** @} */ + +/*------------------------------------------------------------------------------*/ +/** + * \defgroup uipoptipv6 IPv6 configuration options + * @{ + * + */ + +/** The maximum transmission unit at the IP Layer*/ +#define UIP_LINK_MTU 1280 + +#ifndef NETSTACK_CONF_WITH_IPV6 +/** Do we use IPv6 or not (default: no) */ +#define NETSTACK_CONF_WITH_IPV6 0 +#endif + +#ifndef UIP_CONF_IPV6_QUEUE_PKT +/** Do we do per %neighbor queuing during address resolution (default: no) */ +#define UIP_CONF_IPV6_QUEUE_PKT 0 +#endif + +#ifndef UIP_CONF_IPV6_CHECKS +/** Do we do IPv6 consistency checks (highly recommended, default: yes) */ +#define UIP_CONF_IPV6_CHECKS 1 +#endif + +#ifndef UIP_CONF_IPV6_REASSEMBLY +/** Do we do IPv6 fragmentation (default: no) */ +#define UIP_CONF_IPV6_REASSEMBLY 0 +#endif + +#ifndef UIP_CONF_NETIF_MAX_ADDRESSES +/** Default number of IPv6 addresses associated to the node's interface */ +#define UIP_CONF_NETIF_MAX_ADDRESSES 3 +#endif + +#ifndef UIP_CONF_DS6_PREFIX_NBU +/** Default number of IPv6 prefixes associated to the node's interface */ +#define UIP_CONF_DS6_PREFIX_NBU 2 +#endif + +#ifndef UIP_CONF_DS6_DEFRT_NBU +/** Minimum number of default routers */ +#define UIP_CONF_DS6_DEFRT_NBU 2 +#endif +/** @} */ + +/*------------------------------------------------------------------------------*/ +/** + * \defgroup uipoptudp UDP configuration options + * @{ + * + * \note The UDP support in uIP is still not entirely complete; there + * is no support for sending or receiving broadcast or multicast + * packets, but it works well enough to support a number of vital + * applications such as DNS queries, though + */ + +/** + * Toggles whether UDP support should be compiled in or not. + * + * \hideinitializer + */ +#ifdef UIP_CONF_UDP +#define UIP_UDP UIP_CONF_UDP +#else /* UIP_CONF_UDP */ +#define UIP_UDP 1 +#endif /* UIP_CONF_UDP */ + +/** + * Toggles if UDP checksums should be used or not. + * + * \note Support for UDP checksums is currently not included in uIP, + * so this option has no function. + * + * \hideinitializer + */ +#ifdef UIP_CONF_UDP_CHECKSUMS +#define UIP_UDP_CHECKSUMS (UIP_CONF_UDP_CHECKSUMS) +#else +#define UIP_UDP_CHECKSUMS (NETSTACK_CONF_WITH_IPV6) +#endif + +/** + * The maximum amount of concurrent UDP connections. + * + * \hideinitializer + */ +#ifdef UIP_CONF_UDP_CONNS +#define UIP_UDP_CONNS (UIP_CONF_UDP_CONNS) +#else /* UIP_CONF_UDP_CONNS */ +#define UIP_UDP_CONNS 10 +#endif /* UIP_CONF_UDP_CONNS */ + +/** + * The name of the function that should be called when UDP datagrams arrive. + * + * \hideinitializer + */ + + +/** @} */ +/*------------------------------------------------------------------------------*/ +/** + * \defgroup uipopttcp TCP configuration options + * @{ + */ + +/** + * Toggles whether TCP support should be compiled in or not. + * + * \hideinitializer + */ +#ifdef UIP_CONF_TCP +#define UIP_TCP (UIP_CONF_TCP) +#else /* UIP_CONF_TCP */ +#define UIP_TCP 1 +#endif /* UIP_CONF_TCP */ + +/** + * Determines if support for opening connections from uIP should be + * compiled in. + * + * If the applications that are running on top of uIP for this project + * do not need to open outgoing TCP connections, this configuration + * option can be turned off to reduce the code size of uIP. + * + * \hideinitializer + */ +#ifndef UIP_CONF_ACTIVE_OPEN +#define UIP_ACTIVE_OPEN 1 +#else /* UIP_CONF_ACTIVE_OPEN */ +#define UIP_ACTIVE_OPEN (UIP_CONF_ACTIVE_OPEN) +#endif /* UIP_CONF_ACTIVE_OPEN */ + +/** + * The maximum number of simultaneously open TCP connections. + * + * Since the TCP connections are statically allocated, turning this + * configuration knob down results in less RAM used. Each TCP + * connection requires approximately 30 bytes of memory. + * + * \hideinitializer + */ +#ifndef UIP_CONF_MAX_CONNECTIONS +#define UIP_CONNS 10 +#else /* UIP_CONF_MAX_CONNECTIONS */ +#define UIP_CONNS (UIP_CONF_MAX_CONNECTIONS) +#endif /* UIP_CONF_MAX_CONNECTIONS */ + + +/** + * The maximum number of simultaneously listening TCP ports. + * + * Each listening TCP port requires 2 bytes of memory. + * + * \hideinitializer + */ +#ifndef UIP_CONF_MAX_LISTENPORTS +#define UIP_LISTENPORTS 20 +#else /* UIP_CONF_MAX_LISTENPORTS */ +#define UIP_LISTENPORTS (UIP_CONF_MAX_LISTENPORTS) +#endif /* UIP_CONF_MAX_LISTENPORTS */ + +/** + * Determines if support for TCP urgent data notification should be + * compiled in. + * + * Urgent data (out-of-band data) is a rarely used TCP feature that + * very seldom would be required. + * + * \hideinitializer + */ +#define UIP_URGDATA 0 + +/** + * The initial retransmission timeout counted in timer pulses. + * + * This should not be changed. + */ +#define UIP_RTO 3 + +/** + * The maximum number of times a segment should be retransmitted + * before the connection should be aborted. + * + * This should not be changed. + */ +#define UIP_MAXRTX 8 + +/** + * The maximum number of times a SYN segment should be retransmitted + * before a connection request should be deemed to have been + * unsuccessful. + * + * This should not need to be changed. + */ +#define UIP_MAXSYNRTX 5 + +/** + * The TCP maximum segment size. + * + * This is should not be to set to more than + * UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN. + */ +#ifdef UIP_CONF_TCP_MSS +#if UIP_CONF_TCP_MSS > (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN) +#error UIP_CONF_TCP_MSS is too large for the current UIP_BUFSIZE +#endif /* UIP_CONF_TCP_MSS > (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN) */ +#define UIP_TCP_MSS (UIP_CONF_TCP_MSS) +#else /* UIP_CONF_TCP_MSS */ +#define UIP_TCP_MSS (UIP_BUFSIZE - UIP_LLH_LEN - UIP_TCPIP_HLEN) +#endif /* UIP_CONF_TCP_MSS */ + +/** + * The size of the advertised receiver's window. + * + * Should be set low (i.e., to the size of the uip_buf buffer) if the + * application is slow to process incoming data, or high (32768 bytes) + * if the application processes data quickly. + * + * \hideinitializer + */ +#ifndef UIP_CONF_RECEIVE_WINDOW +#define UIP_RECEIVE_WINDOW (UIP_TCP_MSS) +#else +#define UIP_RECEIVE_WINDOW (UIP_CONF_RECEIVE_WINDOW) +#endif + +/** + * How long a connection should stay in the TIME_WAIT state. + * + * This can be reduced for faster entry into power saving modes. + */ +#ifndef UIP_CONF_WAIT_TIMEOUT +#define UIP_TIME_WAIT_TIMEOUT 120 +#else +#define UIP_TIME_WAIT_TIMEOUT UIP_CONF_WAIT_TIMEOUT +#endif + +/** @} */ +/*------------------------------------------------------------------------------*/ +/** + * \defgroup uipoptarp ARP configuration options + * @{ + */ + +/** + * The size of the ARP table. + * + * This option should be set to a larger value if this uIP node will + * have many connections from the local network. + * + * \hideinitializer + */ +#ifdef UIP_CONF_ARPTAB_SIZE +#define UIP_ARPTAB_SIZE (UIP_CONF_ARPTAB_SIZE) +#else +#define UIP_ARPTAB_SIZE 8 +#endif + +/** + * The maximum age of ARP table entries measured in 10ths of seconds. + * + * An UIP_ARP_MAXAGE of 120 corresponds to 20 minutes (BSD + * default). + */ +#define UIP_ARP_MAXAGE 120 + + +/** @} */ + +/*------------------------------------------------------------------------------*/ + +/** + * \defgroup uipoptmac layer 2 options (for ipv6) + * @{ + */ + +#define UIP_DEFAULT_PREFIX_LEN 64 + +/** @} */ + +/*------------------------------------------------------------------------------*/ + +/** + * \defgroup uipoptsics 6lowpan options (for ipv6) + * @{ + */ +/** + * Timeout for packet reassembly at the 6lowpan layer + * (should be < 60s) + */ +#ifdef SICSLOWPAN_CONF_MAXAGE +#define SICSLOWPAN_REASS_MAXAGE (SICSLOWPAN_CONF_MAXAGE) +#else +#define SICSLOWPAN_REASS_MAXAGE 20 +#endif + +/** + * Do we compress the IP header or not (default: no) + */ +#ifndef SICSLOWPAN_CONF_COMPRESSION +#define SICSLOWPAN_CONF_COMPRESSION 0 +#endif + +/** + * If we use IPHC compression, how many address contexts do we support + */ +#ifndef SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS +#define SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS 1 +#endif + +/** + * Do we support 6lowpan fragmentation + */ +#ifndef SICSLOWPAN_CONF_FRAG +#define SICSLOWPAN_CONF_FRAG 0 +#endif + +/** @} */ + +/*------------------------------------------------------------------------------*/ +/** + * \defgroup uipoptcpu CPU architecture configuration + * @{ + * + * The CPU architecture configuration is where the endianess of the + * CPU on which uIP is to be run is specified. Most CPUs today are + * little endian, and the most notable exception are the Motorolas + * which are big endian. The BYTE_ORDER macro should be changed to + * reflect the CPU architecture on which uIP is to be run. + */ + +/** + * The byte order of the CPU architecture on which uIP is to be run. + * + * This option can be either UIP_BIG_ENDIAN (Motorola byte order) or + * UIP_LITTLE_ENDIAN (Intel byte order). + * + * \hideinitializer + */ +#ifdef UIP_CONF_BYTE_ORDER +#define UIP_BYTE_ORDER (UIP_CONF_BYTE_ORDER) +#else /* UIP_CONF_BYTE_ORDER */ +#define UIP_BYTE_ORDER (UIP_LITTLE_ENDIAN) +#endif /* UIP_CONF_BYTE_ORDER */ + +/** @} */ +/*------------------------------------------------------------------------------*/ + +/** + * \defgroup uipoptapp Application specific configurations + * @{ + * + * An uIP application is implemented using a single application + * function that is called by uIP whenever a TCP/IP event occurs. The + * name of this function must be registered with uIP at compile time + * using the UIP_APPCALL definition. + * + * uIP applications can store the application state within the + * uip_conn structure by specifying the type of the application + * structure by typedef:ing the type uip_tcp_appstate_t and uip_udp_appstate_t. + * + * The file containing the definitions must be included in the + * uipopt.h file. + * + * The following example illustrates how this can look. + \code + + void httpd_appcall(void); + #define UIP_APPCALL httpd_appcall + + struct httpd_state { + uint8_t state; + uint16_t count; + char *dataptr; + char *script; + }; + typedef struct httpd_state uip_tcp_appstate_t + \endcode +*/ + +/** + * \var #define UIP_APPCALL + * + * The name of the application function that uIP should call in + * response to TCP/IP events. + * + */ + +/** + * \var typedef uip_tcp_appstate_t + * + * The type of the application state that is to be stored in the + * uip_conn structure. This usually is typedef:ed to a struct holding + * application state information. + */ + +/** + * \var typedef uip_udp_appstate_t + * + * The type of the application state that is to be stored in the + * uip_conn structure. This usually is typedef:ed to a struct holding + * application state information. + */ +/** @} */ + +#endif /* UIPOPT_H_ */ +/** @} */ +/** @} */ diff --git a/Kernel/platform-coco3/Makefile b/Kernel/platform-coco3/Makefile index b7abe272..90fa9537 100644 --- a/Kernel/platform-coco3/Makefile +++ b/Kernel/platform-coco3/Makefile @@ -46,6 +46,7 @@ image: $(CROSS_CC) $(CROSS_CCOPTS) -O0 -c -o ../bank16k.o ../bank16k.c $(CROSS_CC) $(CROSS_CCOPTS) -O0 -c -o devtty.o devtty.c $(CROSS_CC) $(CROSS_CCOPTS) -O0 -c -o ../timer.o ../timer.c + $(CROSS_CC) $(CROSS_CCOPTS) -O0 -c -o net_native.o ../dev/net/net_native.c $(CROSS_CC) $(CROSS_CC_VIDEO) $(CROSS_CCOPTS) -O0 -c -o video.o video.c $(CROSS_CC) $(CROSS_CC_VIDEO) $(CROSS_CCOPTS) -O0 -c -o ../usermem.o ../usermem.c $(CROSS_LD) -o ../fuzix.bin -Map=../fuzix.map --script=fuzix.link --oformat=decb \ diff --git a/Kernel/platform-coco3/build b/Kernel/platform-coco3/build index 44603523..c6733408 100755 --- a/Kernel/platform-coco3/build +++ b/Kernel/platform-coco3/build @@ -37,6 +37,10 @@ cd ../dw make -f Makefile.6809 TARGET=coco3 clean make -f Makefile.6809 TARGET=coco3 +cd ../netd +make -f Makefile.6809 TARGET=coco3 clean +make -f Makefile.6809 TARGET=coco3 + # build sh cd ../../Applications/V7/cmd/sh make -f Makefile.6809 TARGET=coco3 clean diff --git a/Kernel/platform-coco3/devices.c b/Kernel/platform-coco3/devices.c index e2a24ba6..45c6003a 100644 --- a/Kernel/platform-coco3/devices.c +++ b/Kernel/platform-coco3/devices.c @@ -11,6 +11,7 @@ #include #include + struct devsw dev_tab[] = /* The device driver switch table */ { // minor open close read write ioctl diff --git a/Kernel/platform-coco3/main.c b/Kernel/platform-coco3/main.c index f4f06635..af0b957f 100644 --- a/Kernel/platform-coco3/main.c +++ b/Kernel/platform-coco3/main.c @@ -86,7 +86,6 @@ uint8_t platform_param(char *p) return 0; } - #ifdef CONFIG_LEVEL_2 /* We always use 512 byte paths so no special pathbuf needed */ diff --git a/Library/include/sys/net_native.h b/Library/include/sys/net_native.h new file mode 100644 index 00000000..5cc82c6f --- /dev/null +++ b/Library/include/sys/net_native.h @@ -0,0 +1,75 @@ +#ifndef _DEV_NET_NET_NATIVE_H +#define _DEV_NET_NET_NATIVE_H + +/* These are by socket and each one is + + [RX.0][RX.1]..[RX.n][TX.0][TX.1]...[TX.n] + +*/ + +#define NSOCKBUF 4 /* 4 buffers per socket */ +#define RINGSIZ (1024 * NSOCKBUF) + +/* The usable space will be lower once the headers are added for addressing */ +#define TXPKTSIZ 1024 +#define RXPKTSIZ 1024 + +#define SOCKBUFOFF (2 * RINGSIZ) +#define RXBUFOFF RINGSIZ + +/* Total size is thus 8K * sockets - typically 64K for the file */ + + +struct sockdata { + void *socket; + uint8_t err; + uint8_t ret; + uint8_t event; /* Waiting events to go to user space */ +#define NEV_STATE 1 +#define NEV_READ 2 +#define NEV_WRITE 4 +#define NEV_MASK 7 +#define NEVW_STATE 128 + uint8_t newstate; /* Requested new state */ + uint8_t lcn; /* Logical channel */ + uint16_t rlen[NSOCKBUF]; /* TCP uses 0 as total space */ + uint16_t rbuf; + uint16_t rnext; + uint16_t tlen[NSOCKBUF]; /* Not used by TCP */ + uint16_t tbuf; /* Next transmit buffer (pointer for tcp) */ + uint16_t tnext; /* Buffers of room (bytes if TCP) */ +}; + +struct sockmsg { + struct socket s; + struct sockdata sd; +}; + +#define NE_NEWSTATE 1 +#define NE_EVENT 2 +#define NE_SETADDR 3 +#define NE_INIT 4 +#define NE_ROOM 5 +#define NE_DATA 6 +#define NE_SHUTR 7 + +struct netevent { + uint8_t socket; + uint8_t event; + uint8_t ret; + uint16_t data; + union { + uint16_t rlen[NSOCKBUF]; + struct sockaddrs addr; + } info; +}; + +#define NET_INIT 0x4401 + +int netdev_write(void); +int netdev_read(uint8_t flag); +int netdev_ioctl(uint16_t request, char *data); +int netdev_close(void); + + +#endif -- 2.34.1