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Added LWIP_HOOK_ETHARP_GET_GW to implement IPv4 routing with multiple gateways

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goldsimon
2014-03-17 12:53:31 +01:00
parent 3fceef0936
commit 40d25adb88
3 changed files with 33 additions and 8 deletions
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24
src/netif/etharp.c
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@@ -954,14 +954,22 @@ etharp_output(struct netif *netif, struct pbuf *q, ip_addr_t *ipaddr)
if (!ip_addr_islinklocal(&iphdr->src))
#endif /* LWIP_AUTOIP */
{
/* interface has default gateway? */
if (!ip_addr_isany(&netif->gw)) {
/* send to hardware address of default gateway IP address */
dst_addr = &(netif->gw);
/* no default gateway available */
} else {
/* no route to destination error (default gateway missing) */
return ERR_RTE;
#ifdef LWIP_HOOK_ETHARP_GET_GW
/* For advanced routing, a single default gateway might not be enough, so get
the IP address of the gateway to handle the current destination address. */
dst_addr = LWIP_HOOK_ETHARP_GET_GW(netif, ipaddr);
if(dst_addr == NULL)
#endif /* LWIP_HOOK_ETHARP_GET_GW */
{
/* interface has default gateway? */
if (!ip_addr_isany(&netif->gw)) {
/* send to hardware address of default gateway IP address */
dst_addr = &(netif->gw);
/* no default gateway available */
} else {
/* no route to destination error (default gateway missing) */
return ERR_RTE;
}
}
}
}