Add untested support for UNDI transmit and receive.

src/net/arp.c

@@ -281,8 +281,7 @@ static int arp_rx ( struct io_buffer *iobuf, struct net_device *netdev,
  *
  * This operation is meaningless for the ARP protocol.
  */
-static const char *
-arp_ntoa ( const void *net_addr __attribute__ (( unused )) ) {
+static const char * arp_ntoa ( const void *net_addr __unused ) {
 	return "<ARP>";
 }
 

src/net/ethernet.c

@@ -108,6 +108,7 @@ struct ll_protocol ethernet_protocol __ll_protocol = {
 	.name		= "Ethernet",
 	.ll_proto	= htons ( ARPHRD_ETHER ),
 	.ll_addr_len	= ETH_ALEN,
+	.ll_header_len	= ETH_HLEN,
 	.ll_broadcast	= eth_broadcast,
 	.tx		= eth_tx,
 	.rx		= eth_rx,

src/net/rarp.c

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdint.h>
+#include <byteswap.h>
+#include <gpxe/netdevice.h>
+#include <gpxe/iobuf.h>
+#include <gpxe/if_ether.h>
+#include <gpxe/rarp.h>
+
+/** @file
+ *
+ * Reverse Address Resolution Protocol
+ *
+ */
+
+/**
+ * Process incoming ARP packets
+ *
+ * @v iobuf		I/O buffer
+ * @v netdev		Network device
+ * @v ll_source		Link-layer source address
+ * @ret rc		Return status code
+ *
+ * This is a dummy method which simply discards RARP packets.
+ */
+static int rarp_rx ( struct io_buffer *iobuf,
+		     struct net_device *netdev __unused,
+		     const void *ll_source __unused ) {
+	free_iob ( iobuf );
+	return 0;
+}
+
+
+/**
+ * Transcribe RARP address
+ *
+ * @v net_addr	RARP address
+ * @ret string	"<RARP>"
+ *
+ * This operation is meaningless for the RARP protocol.
+ */
+static const char * rarp_ntoa ( const void *net_addr __unused ) {
+	return "<RARP>";
+}
+
+/** RARP protocol */
+struct net_protocol rarp_protocol __net_protocol = {
+	.name = "RARP",
+	.net_proto = htons ( ETH_P_RARP ),
+	.rx = rarp_rx,
+	.ntoa = rarp_ntoa,
+};