From: Hans Dedecker <dedeckeh@gmail.com>
Date: Thu, 21 Mar 2019 13:17:50 +0000 (+0100)
Subject: ndp: fix adding proxy neighbor entries
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=e4a24dcb5aa48fdace3d6482db262bde9969b5bb;p=oweals%2Fodhcpd.git

ndp: fix adding proxy neighbor entries

In case multiple logical OpenWrt interfaces are stacked on the same device
and one of the interfaces is configured in relay and the other not; adding
a proxy neighbor entry will result into it immediately being deleted if
the interface in non relay mode comes last.
Fix this by not doing a delete on the interface which is not configured in
relay mode.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
---

diff --git a/src/ndp.c b/src/ndp.c
index c819062..800c616 100644
--- a/src/ndp.c
+++ b/src/ndp.c
@@ -342,16 +342,14 @@ static void setup_addr_for_relaying(struct in6_addr *addr, struct interface *ifa
 	inet_ntop(AF_INET6, addr, ipbuf, sizeof(ipbuf));
 
 	avl_for_each_element(&interfaces, c, avl) {
-		if (iface == c || (c->ndp != MODE_RELAY && !add))
+		if (iface == c || c->ndp != MODE_RELAY)
 			continue;
 
-		bool neigh_add = (c->ndp == MODE_RELAY ? add : false);
-
-		if (netlink_setup_proxy_neigh(addr, c->ifindex, neigh_add))
+		if (netlink_setup_proxy_neigh(addr, c->ifindex, add))
 			syslog(LOG_DEBUG, "Failed to %s proxy neighbour entry %s on %s",
-				neigh_add ? "add" : "delete", ipbuf, c->name);
+				add ? "add" : "delete", ipbuf, c->name);
 		else
 			syslog(LOG_DEBUG, "%s proxy neighbour entry %s on %s",
-				neigh_add ? "Added" : "Deleted", ipbuf, c->name);
+				add ? "Added" : "Deleted", ipbuf, c->name);
 	}
 }