[OpenWrt-Devel] [PATCH] add host route on local ip arp request

[Alejandro Enrique]

This patch fixes relayd not adding a host on an ARP request for the local
IP address.
When relayd is launched using the -L option, it was not adding the
necessary host routes when it receives an ARP request for the local
IP address.

This issue makes a host not able to connect to the device running
relayd until there is ARP traffic involving a third host.

Signed-off-by: Alejandro Enrique <alejandro.enrique at fon.com>
---
 main.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index 801d2f2..2e34954 100644
--- a/main.c
+++ b/main.c
@@ -386,15 +386,15 @@ static void recv_arp_request(struct relayd_interface *rif, struct arp_packet *pk
 	if (!memcmp(pkt->arp.arp_spa, "\x00\x00\x00\x00", 4))
 		return;
 
+	host = find_host_by_ipaddr(NULL, pkt->arp.arp_spa);
+	if (!host || host->rif != rif)
+		relayd_refresh_host(rif, pkt->eth.ether_shost, pkt->arp.arp_spa);
+
 	if (local_route_table && !memcmp(pkt->arp.arp_tpa, local_addr, sizeof(local_addr))) {
 		send_arp_reply(rif, local_addr, pkt->arp.arp_sha, pkt->arp.arp_spa);
 		return;
 	}
 
-	host = find_host_by_ipaddr(NULL, pkt->arp.arp_spa);
-	if (!host || host->rif != rif)
-		relayd_refresh_host(rif, pkt->eth.ether_shost, pkt->arp.arp_spa);
-
 	host = find_host_by_ipaddr(NULL, pkt->arp.arp_tpa);
 
 	/*
-- 
1.7.10.4
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