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Seemingly un-necessary changes but works around some bad ZDS behavior

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1570 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2009-03-07 23:26:33 +00:00
parent 6eff0f3485
commit 8af0d8ce8f
1 changed files with 54 additions and 48 deletions
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86
net/uip/uip_arp.c
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@ -2,7 +2,7 @@
* net/uip/uip_arp.c
* Implementation of the ARP Address Resolution Protocol.
*
* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
* Copyright (C) 2007, 2008, 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Based on uIP which also has a BSD style license:
@ -88,7 +88,7 @@
struct arp_hdr
{
uint16 ah_hwtype; /* 16-bit Hardware type (Ethernet=0x001) */
uint16 ah_protocol; /* 16-bit Protocoal type (IP=0x0800 */
uint16 ah_protocol; /* 16-bit Protocol type (IP=0x0800) */
uint8 ah_hwlen; /* 8-bit Hardware address size (6) */
uint8 ah_protolen; /* 8-bit Procotol address size (4) */
uint16 ah_opcode; /* 16-bit Operation */
@ -322,6 +322,7 @@ void uip_arp_timer(void)
void uip_arp_arpin(struct uip_driver_s *dev)
{
struct arp_hdr *parp = ARPBUF;
in_addr_t ipaddr;
if (dev->d_len < (sizeof(struct arp_hdr) + UIP_LLH_LEN))
@ -331,33 +332,35 @@ void uip_arp_arpin(struct uip_driver_s *dev)
}
dev->d_len = 0;
ipaddr = uip_ip4addr_conv(ARPBUF->ah_dipaddr);
switch(ARPBUF->ah_opcode)
ipaddr = uip_ip4addr_conv(parp->ah_dipaddr);
switch(parp->ah_opcode)
{
case HTONS(ARP_REQUEST):
/* ARP request. If it asked for our address, we send out a reply. */
if (uip_ipaddr_cmp(ipaddr, dev->d_ipaddr))
{
struct uip_eth_hdr *peth = ETHBUF;
/* First, we register the one who made the request in our ARP
* table, since it is likely that we will do more communication
* with this host in the future.
*/
uip_arp_update(ARPBUF->ah_sipaddr, ARPBUF->ah_shwaddr);
uip_arp_update(parp->ah_sipaddr, parp->ah_shwaddr);
ARPBUF->ah_opcode = HTONS(ARP_REPLY);
memcpy(ARPBUF->ah_dhwaddr, ARPBUF->ah_shwaddr, ETHER_ADDR_LEN);
memcpy(ARPBUF->ah_shwaddr, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(ETHBUF->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(ETHBUF->dest, ARPBUF->ah_dhwaddr, ETHER_ADDR_LEN);
parp->ah_opcode = HTONS(ARP_REPLY);
memcpy(parp->ah_dhwaddr, parp->ah_shwaddr, ETHER_ADDR_LEN);
memcpy(parp->ah_shwaddr, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(peth->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(peth->dest, parp->ah_dhwaddr, ETHER_ADDR_LEN);
ARPBUF->ah_dipaddr[0] = ARPBUF->ah_sipaddr[0];
ARPBUF->ah_dipaddr[1] = ARPBUF->ah_sipaddr[1];
uiphdr_ipaddr_copy(ARPBUF->ah_sipaddr, &dev->d_ipaddr);
uip_arp_dump(ARPBUF);
parp->ah_dipaddr[0] = parp->ah_sipaddr[0];
parp->ah_dipaddr[1] = parp->ah_sipaddr[1];
uiphdr_ipaddr_copy(parp->ah_sipaddr, &dev->d_ipaddr);
uip_arp_dump(parp);
ETHBUF->type = HTONS(UIP_ETHTYPE_ARP);
peth->type = HTONS(UIP_ETHTYPE_ARP);
dev->d_len = sizeof(struct arp_hdr) + UIP_LLH_LEN;
}
break;
@ -369,7 +372,7 @@ void uip_arp_arpin(struct uip_driver_s *dev)
if (uip_ipaddr_cmp(ipaddr, dev->d_ipaddr))
{
uip_arp_update(ARPBUF->ah_sipaddr, ARPBUF->ah_shwaddr);
uip_arp_update(parp->ah_sipaddr, parp->ah_shwaddr);
}
break;
}
@ -403,6 +406,9 @@ void uip_arp_arpin(struct uip_driver_s *dev)
void uip_arp_out(struct uip_driver_s *dev)
{
struct arp_entry *tabptr = NULL;
struct arp_hdr *parp = ARPBUF;
struct uip_eth_hdr *peth = ETHBUF;
struct ethip_hdr *pip = IPBUF;
in_addr_t ipaddr;
in_addr_t destipaddr;
int i;
@ -417,9 +423,9 @@ void uip_arp_out(struct uip_driver_s *dev)
/* First check if destination is a local broadcast. */
if (uiphdr_ipaddr_cmp(IPBUF->eh_destipaddr, g_broadcast_ipaddr))
if (uiphdr_ipaddr_cmp(pip->eh_destipaddr, g_broadcast_ipaddr))
{
memcpy(ETHBUF->dest, g_broadcast_ethaddr.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(peth->dest, g_broadcast_ethaddr.ether_addr_octet, ETHER_ADDR_LEN);
}
#if defined(CONFIG_NET_MULTICAST) && !defined(CONFIG_NET_IPv6)
/* Check if the destination address is a multicast address
@ -431,24 +437,24 @@ void uip_arp_out(struct uip_driver_s *dev)
* addresses=0xff (ff00::/8.)
*/
else if (IPBUF->eh_destipaddr[0] >= HTONS(0xe000) &&
IPBUF->eh_destipaddr[0] <= HTONS(0xefff))
else if (pip->eh_destipaddr[0] >= HTONS(0xe000) &&
pip->eh_destipaddr[0] <= HTONS(0xefff))
{
/* Build the well-known IPv4 IGMP ethernet address. The first
* three bytes are fixed; the final three variable come from the
* last three bytes of the IP address.
*/
const ubyte *ip = ((ubyte*)IPBUF->eh_destipaddr) + 1;
memcpy(ETHBUF->dest, g_multicast_ethaddr, 3);
memcpy(&ETHBUF->dest[3], ip, 3);
const ubyte *ip = ((ubyte*)pip->eh_destipaddr) + 1;
memcpy(peth->dest, g_multicast_ethaddr, 3);
memcpy(&peth->dest[3], ip, 3);
}
#endif
else
{
/* Check if the destination address is on the local network. */
destipaddr = uip_ip4addr_conv(IPBUF->eh_destipaddr);
destipaddr = uip_ip4addr_conv(pip->eh_destipaddr);
if (!uip_ipaddr_maskcmp(destipaddr, dev->d_ipaddr, dev->d_netmask))
{
/* Destination address was not on the local network, so we need to
@ -482,35 +488,35 @@ void uip_arp_out(struct uip_driver_s *dev)
* overwrite the IP packet with an ARP request.
*/
memset(ETHBUF->dest, 0xff, ETHER_ADDR_LEN);
memset(ARPBUF->ah_dhwaddr, 0x00, ETHER_ADDR_LEN);
memcpy(ETHBUF->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(ARPBUF->ah_shwaddr, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
memset(peth->dest, 0xff, ETHER_ADDR_LEN);
memset(parp->ah_dhwaddr, 0x00, ETHER_ADDR_LEN);
memcpy(peth->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(parp->ah_shwaddr, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
uiphdr_ipaddr_copy(ARPBUF->ah_dipaddr, &ipaddr);
uiphdr_ipaddr_copy(ARPBUF->ah_sipaddr, &dev->d_ipaddr);
uiphdr_ipaddr_copy(parp->ah_dipaddr, &ipaddr);
uiphdr_ipaddr_copy(parp->ah_sipaddr, &dev->d_ipaddr);
ARPBUF->ah_opcode = HTONS(ARP_REQUEST);
ARPBUF->ah_hwtype = HTONS(ARP_HWTYPE_ETH);
ARPBUF->ah_protocol = HTONS(UIP_ETHTYPE_IP);
ARPBUF->ah_hwlen = ETHER_ADDR_LEN;
ARPBUF->ah_protolen = 4;
uip_arp_dump(ARPBUF);
parp->ah_opcode = HTONS(ARP_REQUEST);
parp->ah_hwtype = HTONS(ARP_HWTYPE_ETH);
parp->ah_protocol = HTONS(UIP_ETHTYPE_IP);
parp->ah_hwlen = ETHER_ADDR_LEN;
parp->ah_protolen = 4;
uip_arp_dump(parp);
ETHBUF->type = HTONS(UIP_ETHTYPE_ARP);
peth->type = HTONS(UIP_ETHTYPE_ARP);
dev->d_len = sizeof(struct arp_hdr) + UIP_LLH_LEN;
return;
}
/* Build an ethernet header. */
memcpy(ETHBUF->dest, tabptr->at_ethaddr.ether_addr_octet, ETHER_ADDR_LEN);
memcpy(peth->dest, tabptr->at_ethaddr.ether_addr_octet, ETHER_ADDR_LEN);
}
/* Finish populating the ethernet header */
memcpy(ETHBUF->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
ETHBUF->type = HTONS(UIP_ETHTYPE_IP);
memcpy(peth->src, dev->d_mac.ether_addr_octet, ETHER_ADDR_LEN);
peth->type = HTONS(UIP_ETHTYPE_IP);
dev->d_len += UIP_LLH_LEN;
}
#endif /* CONFIG_NET */