From: Rafał Miłecki <rafal@milecki.pl>
Date: Wed, 15 Feb 2017 10:37:57 +0000 (+0100)
Subject: Set errno when refusing to send packet in interface_send_packet
X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fmdnsd.git;a=commitdiff_plain;h=0d545ed7287026584722a3f9aa855c29bd24d59f

Set errno when refusing to send packet in interface_send_packet

Callers of interface_send_packet use perror and so expect errno to be
set in case of fail.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---

diff --git a/interface.c b/interface.c
index ada8acb..f9fe40a 100644
--- a/interface.c
+++ b/interface.c
@@ -125,6 +125,7 @@ interface_send_packet(struct interface *iface, struct sockaddr *to, struct iovec
 {
 	if (!iface->multicast && !to) {
 		fprintf(stderr, "No IP address specified for unicast interface\n");
+		errno = EINVAL;
 		return -1;
 	}