net: add arp header ready for starting work on some actual code

diff --git a/Kernel/include/net.h b/Kernel/include/net.h
index 2ec8457..d09654a 100644 (file)
--- a/Kernel/include/net.h
+++ b/Kernel/include/net.h
@@ -20,6 +20,53 @@
  *     Networking Functionality
  */
 
+struct ethhdr {
+  uint8_t src[6];
+  uint8_t dst[6];
+  uint16_t proto;
+};
+
+struct arphdr
+{
+  uint16_t hrd;                /* format of hardware address   */
+  uint16_t pro;                /* format of protocol address   */
+  uint8_t hln;         /* length of hardware address   */
+  uint8_t pln;         /* length of protocol address   */
+  uint16_t op;         /* ARP opcode (command)         */
+
+  uint8_t src_hw[6];   /* sender hardware address      */
+  uint32_t sip;                /* sender IP address            */
+  uint8_tt tha[6];     /* target hardware address      */
+  uint32_t tip;                /* target IP address            */
+
+};
+
+/* ARP protocol HARDWARE identifiers. */
+#define ARPHRD_NETROM  0               /* from KA9Q: NET/ROM pseudo    */
+#define ARPHRD_ETHER   1               /* Ethernet 10Mbps              */
+#define        ARPHRD_EETHER   2               /* Experimental Ethernet        */
+#define        ARPHRD_AX25     3               /* AX.25 Level 2                */
+#define        ARPHRD_PRONET   4               /* PROnet token ring            */
+#define        ARPHRD_CHAOS    5               /* Chaosnet                     */
+#define        ARPHRD_IEEE802  6               /* IEEE 802.2 Ethernet- huh?    */
+#define        ARPHRD_ARCNET   7               /* ARCnet                       */
+#define        ARPHRD_APPLETLK 8               /* APPLEtalk                    */
+/* Dummy types for non ARP hardware */
+#define ARPHRD_SLIP    256
+#define ARPHRD_CSLIP   257
+#define ARPHRD_SLIP6   258
+#define ARPHRD_CSLIP6  259
+#define ARPHRD_RSRVD   260             /* Notional KISS type           */
+#define ARPHRD_ADAPT   264
+#define ARPHRD_PPP     512
+#define ARPHRD_TUNNEL  768             /* IPIP tunnel                  */
+
+/* ARP protocol opcodes. */
+#define        ARPOP_REQUEST   1               /* ARP request                  */
+#define        ARPOP_REPLY     2               /* ARP reply                    */
+#define        ARPOP_RREQUEST  3               /* RARP request                 */
+#define        ARPOP_RREPLY    4               /* RARP reply                   */
+
 struct iphdr {
 #if defined(LITTLE_ENDIAN_BITFIELD)
        uint8_t ihl:4,
@@ -175,6 +222,7 @@ struct sockaddr_in {
 };
 
 extern int mac_queue(void);
+extern int mac_queue_raw(void);
 extern int loopback_queue(void);
 
 extern struct socket *sock_find(uint16_t src, uint16_t dst);
@@ -186,6 +234,21 @@ extern int pkt_pull(void *ptr, uint16_t len);
 extern uint8_t *pkt_next;
 extern uint16_t pkt_len;
 
+extern void arp_rcv(void);
+extern void arp_put(struct arp *a);
+extern struct arp *arp_get(struct arp *a);
+
+struct arp {
+  uint32_t addr;
+  uint8_t users;
+  uint8_t flags;
+#define ARP_VALID      1
+  uint8_t hw[6];
+};
+
+#define ARPSIZE 16
+
+extern struct arp arptab[ARPSIZE];
 
 extern void ip_mirror(void);
 extern void ip_prepare(struct socket *s, uint16_t len);