[OpenWrt-Devel] [PATCH] relayd: 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>
---
 .../001-add_host_on_local_arp_request.patch        |   22 ++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 package/network/services/relayd/patches/001-add_host_on_local_arp_request.patch

diff --git a/package/network/services/relayd/patches/001-add_host_on_local_arp_request.patch b/package/network/services/relayd/patches/001-add_host_on_local_arp_request.patch
new file mode 100644
index 0000000..aa7dfc7
--- /dev/null
+++ b/package/network/services/relayd/patches/001-add_host_on_local_arp_request.patch
@@ -0,0 +1,22 @@
+--- a/main.c
++++ b/main.c
+@@ -386,15 +386,15 @@ static void recv_arp_request(struct rela
+ 	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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