[tcpip] Pass through network device to transport layer protocols

NDP requires knowledge of the network device on which a packet was
received.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/tcpip.h

@@ -69,14 +69,16 @@ struct tcpip_protocol {
          * Process received packet
          *
          * @v iobuf		I/O buffer
+	 * @v netdev		Network device
 	 * @v st_src		Partially-filled source address
 	 * @v st_dest		Partially-filled destination address
 	 * @v pshdr_csum	Pseudo-header checksum
 	 * @ret rc		Return status code
          *
          * This method takes ownership of the I/O buffer.
          */
-        int ( * rx ) ( struct io_buffer *iobuf, struct sockaddr_tcpip *st_src,
+        int ( * rx ) ( struct io_buffer *iobuf, struct net_device *netdev,
+		       struct sockaddr_tcpip *st_src,
 		       struct sockaddr_tcpip *st_dest, uint16_t pshdr_csum );
         /** 
 	 * Transport-layer protocol number
@@ -128,8 +130,8 @@ struct tcpip_net_protocol {
 /** Declare a TCP/IP network-layer protocol */
 #define __tcpip_net_protocol __table_entry ( TCPIP_NET_PROTOCOLS, 01 )
 
-extern int tcpip_rx ( struct io_buffer *iobuf, uint8_t tcpip_proto,
-		      struct sockaddr_tcpip *st_src,
+extern int tcpip_rx ( struct io_buffer *iobuf, struct net_device *netdev,
+		      uint8_t tcpip_proto, struct sockaddr_tcpip *st_src,
 		      struct sockaddr_tcpip *st_dest, uint16_t pshdr_csum );
 extern int tcpip_tx ( struct io_buffer *iobuf, struct tcpip_protocol *tcpip,
 		      struct sockaddr_tcpip *st_src,

src/net/icmp.c

@@ -38,12 +38,15 @@ struct tcpip_protocol icmp_protocol __tcpip_protocol;
  * Process a received packet
  *
  * @v iobuf		I/O buffer
+ * @v netdev		Network device
  * @v st_src		Partially-filled source address
  * @v st_dest		Partially-filled destination address
  * @v pshdr_csum	Pseudo-header checksum
  * @ret rc		Return status code
  */
-static int icmp_rx ( struct io_buffer *iobuf, struct sockaddr_tcpip *st_src,
+static int icmp_rx ( struct io_buffer *iobuf,
+		     struct net_device *netdev __unused,
+		     struct sockaddr_tcpip *st_src,
 		     struct sockaddr_tcpip *st_dest,
 		     uint16_t pshdr_csum __unused ) {
 	struct icmp_header *icmp = iobuf->data;

src/net/icmpv6.c

@@ -69,7 +69,7 @@ int icmp6_send_solicit ( struct net_device *netdev, struct in6_addr *src __unuse
  * @v st_src	Source address
  * @v st_dest	Destination address
  */
-static int icmp6_rx ( struct io_buffer *iobuf, struct sockaddr_tcpip *st_src,
+static int icmp6_rx ( struct io_buffer *iobuf, struct net_device *netdev __unused, struct sockaddr_tcpip *st_src,
 		      struct sockaddr_tcpip *st_dest, __unused uint16_t pshdr_csum ) {
 	struct icmp6_header *icmp6hdr = iobuf->data;
 

src/net/ipv4.c

@@ -469,7 +469,7 @@ static int ipv4_rx ( struct io_buffer *iobuf,
 	dest.sin.sin_addr = iphdr->dest;
 	pshdr_csum = ipv4_pshdr_chksum ( iobuf, TCPIP_EMPTY_CSUM );
 	iob_pull ( iobuf, hdrlen );
-	if ( ( rc = tcpip_rx ( iobuf, iphdr->protocol, &src.st,
+	if ( ( rc = tcpip_rx ( iobuf, netdev, iphdr->protocol, &src.st,
 			       &dest.st, pshdr_csum ) ) != 0 ) {
 		DBGC ( src.sin.sin_addr, "IPv4 received packet rejected by "
 		       "stack: %s\n", strerror ( rc ) );

src/net/ipv6.c

@@ -260,7 +260,8 @@ static int ipv6_tx ( struct io_buffer *iobuf,
  *
  * Refer http://www.iana.org/assignments/ipv6-parameters for the numbers
  */
-static int ipv6_process_nxt_hdr ( struct io_buffer *iobuf, uint8_t nxt_hdr,
+static int ipv6_process_nxt_hdr ( struct io_buffer *iobuf,
+				  struct net_device *netdev, uint8_t nxt_hdr,
 		struct sockaddr_tcpip *src, struct sockaddr_tcpip *dest ) {
 	switch ( nxt_hdr ) {
 	case IP6_HOPBYHOP: 
@@ -278,7 +279,7 @@ static int ipv6_process_nxt_hdr ( struct io_buffer *iobuf, uint8_t nxt_hdr,
 		return 0;
 	}
 	/* Next header is not a IPv6 extension header */
-	return tcpip_rx ( iobuf, nxt_hdr, src, dest, 0 /* fixme */ );
+	return tcpip_rx ( iobuf, netdev, nxt_hdr, src, dest, 0 /* fixme */ );
 }
 
 /**
@@ -344,7 +345,7 @@ static int ipv6_rx ( struct io_buffer *iobuf,
 	iob_pull ( iobuf, sizeof ( *ip6hdr ) );
 
 	/* Send it to the transport layer */
-	return ipv6_process_nxt_hdr ( iobuf, ip6hdr->nxt_hdr, &src.st, &dest.st );
+	return ipv6_process_nxt_hdr ( iobuf, netdev, ip6hdr->nxt_hdr, &src.st, &dest.st );
 
   drop:
 	DBG ( "Packet dropped\n" );

src/net/tcp.c

@@ -1115,12 +1115,14 @@ static void tcp_process_rx_queue ( struct tcp_connection *tcp ) {
  * Process received packet
  *
  * @v iobuf		I/O buffer
+ * @v netdev		Network device
  * @v st_src		Partially-filled source address
  * @v st_dest		Partially-filled destination address
  * @v pshdr_csum	Pseudo-header checksum
  * @ret rc		Return status code
   */
 static int tcp_rx ( struct io_buffer *iobuf,
+		    struct net_device *netdev __unused,
 		    struct sockaddr_tcpip *st_src,
 		    struct sockaddr_tcpip *st_dest __unused,
 		    uint16_t pshdr_csum ) {

src/net/tcpip.c

@@ -20,6 +20,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 /** Process a received TCP/IP packet
  *
  * @v iobuf		I/O buffer
+ * @v netdev		Network device
  * @v tcpip_proto	Transport-layer protocol number
  * @v st_src		Partially-filled source address
  * @v st_dest		Partially-filled destination address
@@ -32,8 +33,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
  * address family and the network-layer addresses, but leave the ports
  * and the rest of the structures as zero).
  */
-int tcpip_rx ( struct io_buffer *iobuf, uint8_t tcpip_proto, 
-	       struct sockaddr_tcpip *st_src,
+int tcpip_rx ( struct io_buffer *iobuf, struct net_device *netdev,
+	       uint8_t tcpip_proto, struct sockaddr_tcpip *st_src,
 	       struct sockaddr_tcpip *st_dest,
 	       uint16_t pshdr_csum ) {
 	struct tcpip_protocol *tcpip;
@@ -42,7 +43,8 @@ int tcpip_rx ( struct io_buffer *iobuf, uint8_t tcpip_proto,
 	for_each_table_entry ( tcpip, TCPIP_PROTOCOLS ) {
 		if ( tcpip->tcpip_proto == tcpip_proto ) {
 			DBG ( "TCP/IP received %s packet\n", tcpip->name );
-			return tcpip->rx ( iobuf, st_src, st_dest, pshdr_csum );
+			return tcpip->rx ( iobuf, netdev, st_src, st_dest,
+					   pshdr_csum );
 		}
 	}
 

src/net/udp.c

@@ -247,12 +247,15 @@ static struct udp_connection * udp_demux ( struct sockaddr_tcpip *local ) {
  * Process a received packet
  *
  * @v iobuf		I/O buffer
+ * @v netdev		Network device
  * @v st_src		Partially-filled source address
  * @v st_dest		Partially-filled destination address
  * @v pshdr_csum	Pseudo-header checksum
  * @ret rc		Return status code
  */
-static int udp_rx ( struct io_buffer *iobuf, struct sockaddr_tcpip *st_src,
+static int udp_rx ( struct io_buffer *iobuf,
+		    struct net_device *netdev __unused,
+		    struct sockaddr_tcpip *st_src,
 		    struct sockaddr_tcpip *st_dest, uint16_t pshdr_csum ) {
 	struct udp_header *udphdr = iobuf->data;
 	struct udp_connection *udp;