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[lwip-users] Re: [lwip] ARP requests from LwIP side
From: |
leon . woestenberg |
Subject: |
[lwip-users] Re: [lwip] ARP requests from LwIP side |
Date: |
Wed, 08 Jan 2003 22:18:23 -0000 |
Hello,
I'm not sure what lwIP release your are using, but I've recently
submitted 2 bugfixes for both arp.c from lwIP 0.5.0. Search for
the "LW" here:
#define ARPH_HWLEN_SET(hdr, len) (hdr)->_hwlen_protolen =
HTONS(ARPH_PROTOLEN(hdr) | ((len) << 8))
//#define ARPH_PROTOLEN_SET(hdr, len) (hdr)->_hwlen_protolen = HTONS((len)
| (ARPH_PROTOLEN(hdr) << 8)) // LW: bug
#define ARPH_PROTOLEN_SET(hdr, len) (hdr)->_hwlen_protolen = HTONS((len) |
(ARPH_HWLEN(hdr) << 8))
struct pbuf *
arp_query(struct netif *netif, struct eth_addr *ethaddr, struct ip_addr
*ipaddr)
{
struct arp_hdr *hdr;
struct pbuf *p;
u8_t i;
p = pbuf_alloc(PBUF_LINK, sizeof(struct arp_hdr), PBUF_RAM);
if(p == NULL) {
return NULL;
}
hdr = p->payload;
hdr->opcode = htons(ARP_REQUEST);
for(i = 0; i < 6; ++i) {
hdr->dhwaddr.addr[i] = 0x00; // LW: bug in lwIP, uses u16_t, but also
0xff instead of 0xffff
hdr->shwaddr.addr[i] = ethaddr->addr[i];
}
ip_addr_set(&(hdr->dipaddr), ipaddr);
ip_addr_set(&(hdr->sipaddr), &(netif->ip_addr));
hdr->hwtype = htons(HWTYPE_ETHERNET);
ARPH_HWLEN_SET(hdr, 6);
hdr->proto = htons(ETHTYPE_IP);
ARPH_PROTOLEN_SET(hdr, sizeof(struct ip_addr));
for(i = 0; i < 6; ++i) {
hdr->ethhdr.dest.addr[i] = 0xff;
hdr->ethhdr.src.addr[i] = ethaddr->addr[i];
}
hdr->ethhdr.type = htons(ETHTYPE_ARP);
return p;
}
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- [lwip-users] Re: [lwip] ARP requests from LwIP side,
leon . woestenberg <=