From: Roy Marples <roy@marples.name>
Date: Fri, 19 Jun 2015 13:17:10 +0000 (+0000)
Subject: If we free the last ARP state, close the ARP socket.
X-Git-Tag: v6.9.1~43
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8489233dd7b54c08bbac0aff4e5aab21a397d13e;p=thirdparty%2Fdhcpcd.git

If we free the last ARP state, close the ARP socket.
---

diff --git a/arp.c b/arp.c
index e381b42e..46b6789d 100644
--- a/arp.c
+++ b/arp.c
@@ -349,6 +349,15 @@ arp_free(struct arp_state *astate)
 		state = D_STATE(astate->iface);
 		TAILQ_REMOVE(&state->arp_states, astate, next);
 		free(astate);
+
+		/* If there are no more ARP states, close the socket. */
+		if (state->arp_fd != -1 &&
+		    TAILQ_FIRST(&state->arp_states) == NULL)
+		{
+			eloop_event_delete(ifp->ctx->eloop, state->arp_fd);
+			close(state->arp_fd);
+			state->arp_fd = -1;
+		}
 	}
 }