gpxe: delete long since obsolete snapshot of gPXE

gPXE has been deprecated in favor of iPXE for many, many years now.
It is much better than users get it directly from the iPXE project,
since we should no longer need any special modifications for Syslinux
use.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 0 insertions, 289 deletions

diff --git a/gpxe/src/net/arp.c b/gpxe/src/net/arp.c
deleted file mode 100644
index 124a856e..00000000
--- a/gpxe/src/net/arp.c
+++ /dev/null
@@ -1,289 +0,0 @@
-/*
- * Copyright (C) 2006 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.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-#include <stdint.h>
-#include <string.h>
-#include <byteswap.h>
-#include <errno.h>
-#include <gpxe/if_ether.h>
-#include <gpxe/if_arp.h>
-#include <gpxe/iobuf.h>
-#include <gpxe/netdevice.h>
-#include <gpxe/arp.h>
-
-/** @file
- *
- * Address Resolution Protocol
- *
- * This file implements the address resolution protocol as defined in
- * RFC826.  The implementation is media-independent and
- * protocol-independent; it is not limited to Ethernet or to IPv4.
- *
- */
-
-/** An ARP cache entry */
-struct arp_entry {
-	/** Network-layer protocol */
-	struct net_protocol *net_protocol;
-	/** Link-layer protocol */
-	struct ll_protocol *ll_protocol;
-	/** Network-layer address */
-	uint8_t net_addr[MAX_NET_ADDR_LEN];
-	/** Link-layer address */
-	uint8_t ll_addr[MAX_LL_ADDR_LEN];
-};
-
-/** Number of entries in the ARP cache
- *
- * This is a global cache, covering all network interfaces,
- * network-layer protocols and link-layer protocols.
- */
-#define NUM_ARP_ENTRIES 4
-
-/** The ARP cache */
-static struct arp_entry arp_table[NUM_ARP_ENTRIES];
-#define arp_table_end &arp_table[NUM_ARP_ENTRIES]
-
-static unsigned int next_new_arp_entry = 0;
-
-struct net_protocol arp_protocol;
-
-/**
- * Find entry in the ARP cache
- *
- * @v ll_protocol	Link-layer protocol
- * @v net_protocol	Network-layer protocol
- * @v net_addr		Network-layer address
- * @ret arp		ARP cache entry, or NULL if not found
- *
- */
-static struct arp_entry *
-arp_find_entry ( struct ll_protocol *ll_protocol,
-		 struct net_protocol *net_protocol,
-		 const void *net_addr ) {
-	struct arp_entry *arp;
-
-	for ( arp = arp_table ; arp < arp_table_end ; arp++ ) {
-		if ( ( arp->ll_protocol == ll_protocol ) &&
-		     ( arp->net_protocol == net_protocol ) &&
-		     ( memcmp ( arp->net_addr, net_addr,
-				net_protocol->net_addr_len ) == 0 ) )
-			return arp;
-	}
-	return NULL;
-}
-
-/**
- * Look up media-specific link-layer address in the ARP cache
- *
- * @v netdev		Network device
- * @v net_protocol	Network-layer protocol
- * @v dest_net_addr	Destination network-layer address
- * @v source_net_addr	Source network-layer address
- * @ret dest_ll_addr	Destination link layer address
- * @ret rc		Return status code
- *
- * This function will use the ARP cache to look up the link-layer
- * address for the link-layer protocol associated with the network
- * device and the given network-layer protocol and addresses.  If
- * found, the destination link-layer address will be filled in in @c
- * dest_ll_addr.
- *
- * If no address is found in the ARP cache, an ARP request will be
- * transmitted on the specified network device and -ENOENT will be
- * returned.
- */
-int arp_resolve ( struct net_device *netdev, struct net_protocol *net_protocol,
-		  const void *dest_net_addr, const void *source_net_addr,
-		  void *dest_ll_addr ) {
-	struct ll_protocol *ll_protocol = netdev->ll_protocol;
-	const struct arp_entry *arp;
-	struct io_buffer *iobuf;
-	struct arphdr *arphdr;
-	int rc;
-
-	/* Look for existing entry in ARP table */
-	arp = arp_find_entry ( ll_protocol, net_protocol, dest_net_addr );
-	if ( arp ) {
-		DBG ( "ARP cache hit: %s %s => %s %s\n",
-		      net_protocol->name, net_protocol->ntoa ( arp->net_addr ),
-		      ll_protocol->name, ll_protocol->ntoa ( arp->ll_addr ) );
-		memcpy ( dest_ll_addr, arp->ll_addr, ll_protocol->ll_addr_len);
-		return 0;
-	}
-	DBG ( "ARP cache miss: %s %s\n", net_protocol->name,
-	      net_protocol->ntoa ( dest_net_addr ) );
-
-	/* Allocate ARP packet */
-	iobuf = alloc_iob ( MAX_LL_HEADER_LEN + sizeof ( *arphdr ) +
-			  2 * ( MAX_LL_ADDR_LEN + MAX_NET_ADDR_LEN ) );
-	if ( ! iobuf )
-		return -ENOMEM;
-	iob_reserve ( iobuf, MAX_LL_HEADER_LEN );
-
-	/* Build up ARP request */
-	arphdr = iob_put ( iobuf, sizeof ( *arphdr ) );
-	arphdr->ar_hrd = ll_protocol->ll_proto;
-	arphdr->ar_hln = ll_protocol->ll_addr_len;
-	arphdr->ar_pro = net_protocol->net_proto;
-	arphdr->ar_pln = net_protocol->net_addr_len;
-	arphdr->ar_op = htons ( ARPOP_REQUEST );
-	memcpy ( iob_put ( iobuf, ll_protocol->ll_addr_len ),
-		 netdev->ll_addr, ll_protocol->ll_addr_len );
-	memcpy ( iob_put ( iobuf, net_protocol->net_addr_len ),
-		 source_net_addr, net_protocol->net_addr_len );
-	memset ( iob_put ( iobuf, ll_protocol->ll_addr_len ),
-		 0, ll_protocol->ll_addr_len );
-	memcpy ( iob_put ( iobuf, net_protocol->net_addr_len ),
-		 dest_net_addr, net_protocol->net_addr_len );
-
-	/* Transmit ARP request */
-	if ( ( rc = net_tx ( iobuf, netdev, &arp_protocol, 
-			     netdev->ll_broadcast ) ) != 0 )
-		return rc;
-
-	return -ENOENT;
-}
-
-/**
- * Identify ARP protocol
- *
- * @v net_proto			Network-layer protocol, in network-endian order
- * @ret arp_net_protocol	ARP protocol, or NULL
- *
- */
-static struct arp_net_protocol * arp_find_protocol ( uint16_t net_proto ) {
-	struct arp_net_protocol *arp_net_protocol;
-
-	for_each_table_entry ( arp_net_protocol, ARP_NET_PROTOCOLS ) {
-		if ( arp_net_protocol->net_protocol->net_proto == net_proto ) {
-			return arp_net_protocol;
-		}
-	}
-	return NULL;
-}
-
-/**
- * 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 handles ARP requests and responses as detailed in RFC826.  The
- * method detailed within the RFC is pretty optimised, handling
- * requests and responses with basically a single code path and
- * avoiding the need for extraneous ARP requests; read the RFC for
- * details.
- */
-static int arp_rx ( struct io_buffer *iobuf, struct net_device *netdev,
-		    const void *ll_source __unused ) {
-	struct arphdr *arphdr = iobuf->data;
-	struct arp_net_protocol *arp_net_protocol;
-	struct net_protocol *net_protocol;
-	struct ll_protocol *ll_protocol;
-	struct arp_entry *arp;
-	int merge = 0;
-
-	/* Identify network-layer and link-layer protocols */
-	arp_net_protocol = arp_find_protocol ( arphdr->ar_pro );
-	if ( ! arp_net_protocol )
-		goto done;
-	net_protocol = arp_net_protocol->net_protocol;
-	ll_protocol = netdev->ll_protocol;
-
-	/* Sanity checks */
-	if ( ( arphdr->ar_hrd != ll_protocol->ll_proto ) ||
-	     ( arphdr->ar_hln != ll_protocol->ll_addr_len ) ||
-	     ( arphdr->ar_pln != net_protocol->net_addr_len ) )
-		goto done;
-
-	/* See if we have an entry for this sender, and update it if so */
-	arp = arp_find_entry ( ll_protocol, net_protocol,
-			       arp_sender_pa ( arphdr ) );
-	if ( arp ) {
-		memcpy ( arp->ll_addr, arp_sender_ha ( arphdr ),
-			 arphdr->ar_hln );
-		merge = 1;
-		DBG ( "ARP cache update: %s %s => %s %s\n",
-		      net_protocol->name, net_protocol->ntoa ( arp->net_addr ),
-		      ll_protocol->name, ll_protocol->ntoa ( arp->ll_addr ) );
-	}
-
-	/* See if we own the target protocol address */
-	if ( arp_net_protocol->check ( netdev, arp_target_pa ( arphdr ) ) != 0)
-		goto done;
-	
-	/* Create new ARP table entry if necessary */
-	if ( ! merge ) {
-		arp = &arp_table[next_new_arp_entry++ % NUM_ARP_ENTRIES];
-		arp->ll_protocol = ll_protocol;
-		arp->net_protocol = net_protocol;
-		memcpy ( arp->ll_addr, arp_sender_ha ( arphdr ),
-			 arphdr->ar_hln );
-		memcpy ( arp->net_addr, arp_sender_pa ( arphdr ),
-			 arphdr->ar_pln);
-		DBG ( "ARP cache add: %s %s => %s %s\n",
-		      net_protocol->name, net_protocol->ntoa ( arp->net_addr ),
-		      ll_protocol->name, ll_protocol->ntoa ( arp->ll_addr ) );
-	}
-
-	/* If it's not a request, there's nothing more to do */
-	if ( arphdr->ar_op != htons ( ARPOP_REQUEST ) )
-		goto done;
-
-	/* Change request to a reply */
-	DBG ( "ARP reply: %s %s => %s %s\n", net_protocol->name,
-	      net_protocol->ntoa ( arp_target_pa ( arphdr ) ),
-	      ll_protocol->name, ll_protocol->ntoa ( netdev->ll_addr ) );
-	arphdr->ar_op = htons ( ARPOP_REPLY );
-	memswap ( arp_sender_ha ( arphdr ), arp_target_ha ( arphdr ),
-		 arphdr->ar_hln + arphdr->ar_pln );
-	memcpy ( arp_sender_ha ( arphdr ), netdev->ll_addr, arphdr->ar_hln );
-
-	/* Send reply */
-	net_tx ( iob_disown ( iobuf ), netdev, &arp_protocol,
-		 arp_target_ha ( arphdr ) );
-
- done:
-	free_iob ( iobuf );
-	return 0;
-}
-
-/**
- * Transcribe ARP address
- *
- * @v net_addr	ARP address
- * @ret string	"<ARP>"
- *
- * This operation is meaningless for the ARP protocol.
- */
-static const char * arp_ntoa ( const void *net_addr __unused ) {
-	return "<ARP>";
-}
-
-/** ARP protocol */
-struct net_protocol arp_protocol __net_protocol = {
-	.name = "ARP",
-	.net_proto = htons ( ETH_P_ARP ),
-	.rx = arp_rx,
-	.ntoa = arp_ntoa,
-};