From fba3e8d167c037bdbb29ea79c483c10b8f9f2d02 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 11 Aug 2010 04:12:17 +0200
Subject: [PATCH] Learn the ARP entry of the DHCP server directly from the DHCP
 response

---
 main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/main.c b/main.c
index f0630ae..a29be2c 100644
--- a/main.c
+++ b/main.c
@@ -536,6 +536,9 @@ static bool forward_dhcp_packet(struct relayd_interface *rif, void *data, int le
 	if (!forward_dhcp)
 		return true;
 
+	if (dhcp->op == 2)
+		refresh_host(rif, pkt->eth.ether_shost, (void *) &pkt->iph.saddr);
+
 	DPRINTF(2, "%s: handling DHCP %s\n", rif->ifname, (dhcp->op == 1 ? "request" : "response"));
 
 	dhcp->flags |= htons(DHCP_FLAG_BROADCAST);
-- 
2.25.1