Minor changes to the network layer rx() functions

src/include/gpxe/ip.h

@@ -66,6 +66,6 @@ extern void del_ipv4_address ( struct net_device *netdev );
 
 extern int ipv4_uip_tx ( struct pk_buff *pkb );
 extern int ipv4_tx ( struct pk_buff *pkb, struct tcpip_protocol *tcpip,
-		     struct in_addr *dest );
+		     struct sockaddr *sock );
 
 #endif /* _GPXE_IP_H */

src/include/gpxe/tcpip.h

@@ -31,7 +31,9 @@ struct tcpip_protocol {
          *
          * This method takes ownership of the packet buffer.
          */
-        void ( * rx ) ( struct pk_buff *pkb, struct in_addr *src_net_addr, struct in_addr *dest_net_addr );
+        void ( * rx ) ( struct pk_buff *pkb, struct in_addr *src_net_addr,
+			struct in_addr *dest_net_addr );
+
         /** 
 	 * Transport-layer protocol number
 	 *
@@ -42,8 +44,8 @@ struct tcpip_protocol {
 	 * Checksum offset
 	 *
 	 * A negative number indicates that the protocol does not require
-	 * checksumming to be performed by the network layer. A positive number is
+	 * checksumming to be performed by the network layer. A positive number
-	 * the offset of the checksum field in the transport-layer header.
+	 * is the offset of the checksum field in the transport-layer header.
 	 */
 	int csum_offset;
 };
@@ -56,6 +58,15 @@ struct tcpip_net_protocol {
 	struct net_protocol *net_protocol;
 	/** Network address family */
 	sa_family_t sa_family;
+	/**
+	 * Transmit packet
+	 *
+	 * @v pkb		Packet buffer
+ 	 * @v tcpip		Transport-layer TCP/IP protocol
+	 * @v sock		Socket address
+	 */
+	int ( * tx ) ( struct pk_buff *pkb, struct tcpip_protocol *tcpip,
+			struct sockaddr *sock ); 
 	/** Complete transport-layer checksum calculation
 	 *
 	 * @v pkb		Packet buffer

src/net/ipv4.c

@@ -347,7 +347,8 @@ int ipv4_uip_tx ( struct pk_buff *pkb ) {
  * This function expects a transport-layer segment and prepends the IP header
  */
 int ipv4_tx ( struct pk_buff *pkb, struct tcpip_protocol *tcpip,
-	      struct in_addr *dest ) {
+	      struct sockaddr* sock ) {
+	struct in_addr *dest = &sock->sin.sin_addr;
 	struct iphdr *iphdr = pkb_push ( pkb, sizeof ( *iphdr ) );
 	struct ipv4_miniroute *miniroute;
 	struct net_device *netdev = NULL;
@@ -613,6 +614,8 @@ NET_PROTOCOL ( ipv4_protocol );
 /** IPv4 TCPIP net protocol */
 struct tcpip_net_protocol ipv4_tcpip_protocol = {
 	.net_protocol = &ipv4_protocol,
+	.sa_family = AF_INET,
+	.tx = ipv4_tx,
 	.tx_csum = ipv4_tx_csum,
 };
 

src/net/ipv6.c

@@ -1,12 +1,16 @@
 #include <errno.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <byteswap.h>
 #include <gpxe/pkbuff.h>
 #include <gpxe/netdevice.h>
 #include <gpxe/in.h>
+#include <gpxe/if_ether.h>
+#include <gpxe/tcpip.h>
 
 /**
  * Transmit IP6 packets
- *
- * Placeholder to allow linking. The function should be placed in net/ipv6.c
  */
 int ipv6_tx ( struct pk_buff *pkb __unused, uint16_t trans_proto __unused,
 	      struct in6_addr *dest __unused) {
@@ -22,3 +26,33 @@ void ipv6_rx ( struct pk_buff *pkb __unused,
 	       struct net_device *netdev __unused,
 	       const void *ll_source __unused ) {
 }
+
+void ipv6_tx_csum ( struct pk_buff *pkb, struct tcpip_protocol *tcpip ) {
+	return;
+}
+
+static const char * ipv6_ntoa ( const void *net_addr ) {
+//	return inet6_ntoa ( * ( ( struct in6_addr * ) net_addr ) );
+	return "no support yet";
+}
+
+/** IPv6 protocol */
+struct net_protocol ipv6_protocol = {
+	.name = "IP6",
+	.net_proto = htons ( ETH_P_IPV6 ),
+	.net_addr_len = sizeof ( struct in6_addr ),
+	.rx = ipv6_rx,
+	.ntoa = ipv6_ntoa,
+};
+
+NET_PROTOCOL ( ipv6_protocol );
+
+/** IPv6 TCPIP net protocol */
+struct tcpip_net_protocol ipv6_tcpip_protocol = {
+	.net_protocol = &ipv6_protocol,
+	.sa_family = AF_INET6,
+	.tx = ipv6_tx,
+	.tx_csum = ipv6_tx_csum,
+};
+
+TCPIP_NET_PROTOCOL ( ipv6_tcpip_protocol );

src/net/tcpip.c

@@ -5,6 +5,7 @@
 #include <byteswap.h>
 #include <gpxe/in.h>
 #include <gpxe/ip.h>
+#include <gpxe/ip6.h>
 #include <gpxe/pkbuff.h>
 #include <gpxe/tables.h>
 #include <gpxe/netdevice.h>
@@ -41,7 +42,6 @@ void tcpip_rx ( struct pk_buff *pkb, uint8_t trans_proto, struct in_addr *src,
 	/* Identify the transport layer protocol */
 	for ( tcpip = tcpip_protocols; tcpip <= tcpip_protocols_end; ++tcpip ) {
 		if ( tcpip->trans_proto == trans_proto ) {
-			DBG ( "Packet sent to %s module", tcpip->name );
 			tcpip->rx ( pkb, src, dest );
 		}
 	}
@@ -57,17 +57,38 @@ void tcpip_rx ( struct pk_buff *pkb, uint8_t trans_proto, struct in_addr *src,
 int tcpip_tx ( struct pk_buff *pkb, struct tcpip_protocol *tcpip,
 	       struct sockaddr *sock ) {
 
+#if 0 /* This is the right thing to do */
+
+	struct tcpip_net_protocol *tcpip_net;
+
+	/* Identify the network layer protocol */
+	for ( tcpip_net = tcpip_net_protocols; 
+			tcpip_net <= tcpip_net_protocols_end; ++tcpip_net ) {
+		if ( tcpip_net->sa_family == sock->sa_family ) {
+			DBG ( "Packet sent to %s module\n", tcpip_net->net_protocol->name );
+			return tcpip_net->tx ( pkb, tcpip, sock );
+		}
+	}
+	DBG ( "No suitable network layer protocol found for sa_family %s\n",
+						( sock->sa_family );
+	return -EAFNOSUPPORT;
+}
+
+#else
+
 	/* Identify the network layer protocol and send it using xxx_tx() */
 	switch ( sock->sa_family ) {
 	case AF_INET: /* IPv4 network family */
-		return ipv4_tx ( pkb, tcpip, &sock->sin.sin_addr );
+		return ipv4_tx ( pkb, tcpip, sock );
 	case AF_INET6: /* IPv6 network family */
-		return ipv6_tx ( pkb, tcpip, &sock->sin6.sin6_addr );
+		return ipv6_tx ( pkb, tcpip, sock );
 	}
 	DBG ( "Network family %d not supported", sock->sa_family );
 	return -EAFNOSUPPORT;
 }
 
+#endif
+
 /**
  * Calculate continued TCP/IP checkum
  *