From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 11 Aug 2010 02:12:17 +0000 (+0200)
Subject: Learn the ARP entry of the DHCP server directly from the DHCP response
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=fba3e8d167c037bdbb29ea79c483c10b8f9f2d02;p=oweals%2Frelayd.git

Learn the ARP entry of the DHCP server directly from the DHCP response
---

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);