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Correctly identify link-local addresses when sending ARP packets

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goldsimon 2010-03-06 09:56:52 +00:00
parent fcf6434b4b
commit 4649c14856
1 changed files with 8 additions and 6 deletions
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14
src/netif/etharp.c
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@ -733,9 +733,10 @@ etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
(netif->hwaddr_len == ETHARP_HWADDR_LEN)); (netif->hwaddr_len == ETHARP_HWADDR_LEN));
i = ETHARP_HWADDR_LEN; i = ETHARP_HWADDR_LEN;
#if LWIP_AUTOIP #if LWIP_AUTOIP
/* If we are using Link-Local, ARP packets must be broadcast on the /* If we are using Link-Local, all ARP packets that contain a Link-Local
* link layer. (See RFC3927 Section 2.5) */ * 'sender IP address' MUST be sent using link-layer broadcast instead of
ethdst_hwaddr = ((netif->autoip != NULL) && (netif->autoip->state != AUTOIP_STATE_OFF)) ? (u8_t*)(ethbroadcast.addr) : hdr->shwaddr.addr; * link-layer unicast. (See RFC3927 Section 2.5, last paragraph) */
ethdst_hwaddr = ip_addr_islinklocal(&netif->ip_addr) ? (u8_t*)(ethbroadcast.addr) : hdr->shwaddr.addr;
#endif /* LWIP_AUTOIP */ #endif /* LWIP_AUTOIP */
while(i > 0) { while(i > 0) {
@ -1086,9 +1087,10 @@ etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
(netif->hwaddr_len == ETHARP_HWADDR_LEN)); (netif->hwaddr_len == ETHARP_HWADDR_LEN));
k = ETHARP_HWADDR_LEN; k = ETHARP_HWADDR_LEN;
#if LWIP_AUTOIP #if LWIP_AUTOIP
/* If we are using Link-Local, ARP packets must be broadcast on the /* If we are using Link-Local, all ARP packets that contain a Link-Local
* link layer. (See RFC3927 Section 2.5) */ * 'sender IP address' MUST be sent using link-layer broadcast instead of
ethdst_hwaddr = ((netif->autoip != NULL) && (netif->autoip->state != AUTOIP_STATE_OFF)) ? (u8_t*)(ethbroadcast.addr) : ethdst_addr->addr; * link-layer unicast. (See RFC3927 Section 2.5, last paragraph) */
ethdst_hwaddr = ip_addr_islinklocal(ipsrc_addr) ? (u8_t*)(ethbroadcast.addr) : ethdst_addr->addr;
#endif /* LWIP_AUTOIP */ #endif /* LWIP_AUTOIP */
/* Write MAC-Addresses (combined loop for both headers) */ /* Write MAC-Addresses (combined loop for both headers) */
while(k > 0) { while(k > 0) {