netd: mark unused raw sockets with protocol no. 255 rather than 0

diff --git a/Applications/netd/uip.c b/Applications/netd/uip.c
index 5dca380..ea4e377 100644 (file)
--- a/Applications/netd/uip.c
+++ b/Applications/netd/uip.c
@@ -385,7 +385,7 @@ uip_init(void)
 
 #if UIP_RAW
   for(c = 0; c < UIP_RAW_CONNS; ++c) {
-    uip_raw_conns[c].proto = 0;
+    uip_raw_conns[c].proto = 255;
   }
 #endif /* UIP_RAW */
 
@@ -526,7 +526,7 @@ uip_raw_new(const uip_ipaddr_t *ripaddr, uint8_t proto)
   /* find an unused RAW connection */
   conn = 0;
   for(c = 0; c < UIP_RAW_CONNS; ++c) {
-    if(uip_raw_conns[c].proto == 0) {
+    if(uip_raw_conns[c].proto == 255) {
       conn = &uip_raw_conns[c];
       break;
     }
@@ -871,7 +871,7 @@ uip_process(uint8_t flag)
 
 #if UIP_RAW
   if(flag == UIP_RAW_TIMER) {
-    if(uip_raw_conn->proto != 0) {
+    if(uip_raw_conn->proto != 255) {
       uip_conn = NULL;
       uip_sappdata = uip_appdata = &uip_buf[UIP_LLH_LEN + UIP_IPH_LEN];
       uip_len = uip_slen = 0;
@@ -1038,7 +1038,7 @@ uip_process(uint8_t flag)
   for(uip_raw_conn = &uip_raw_conns[0];
       uip_raw_conn < &uip_raw_conns[UIP_RAW_CONNS];
       ++uip_raw_conn){
-      if(uip_raw_conn->proto != 0 &&
+      if(uip_raw_conn->proto != 255 &&
         uip_raw_conn->proto == BUF->proto ){
          uip_conn = NULL;
          uip_flags = UIP_NEWDATA;

diff --git a/Applications/netd/uip.h b/Applications/netd/uip.h
index f77c3d3..e12ffac 100644 (file)
--- a/Applications/netd/uip.h
+++ b/Applications/netd/uip.h
@@ -2240,15 +2240,16 @@ uint16_t uip_icmp6chksum(void);
 /*  Support for RAW sockets here
  *  BMG
  *
- *  - all packets matching protocol go to socket/connection
- *  - packets sent and received start at the protocol header (for now)
- *  
+ *  - received packets get duplicated and sent to each matching socket
+ *  - on write: send just level 4 + header
+ *  - on read: uip will send level 3 (ip) header
+ *  - you can send but not receive UDP/TCP packets via raw socks 
  */
 
 struct uip_raw_conn {
     uip_ipaddr_t ripaddr;           /* IP address of remote peer */
     uint8_t      proto;             /* IP protocol number */
-    uint8_t      ttl;               /* defualt time-to-live */
+    uint8_t      ttl;               /* default time-to-live */
     uip_raw_appstate_t appstate;    /* application's state */
 };
 
@@ -2258,7 +2259,7 @@ extern struct uip_raw_conn uip_raw_conns[UIP_RAW_CONNS];
 struct uip_raw_conn *
 uip_raw_new(const uip_ipaddr_t *ripaddr, uint8_t proto);
 
-#define uip_raw_remove(conn) (conn)->proto = 0
+#define uip_raw_remove(conn) (conn)->proto = 255
 
 #define uip_raw_send(len) uip_send((char *)uip_appdata, len)