From 0d545ed7287026584722a3f9aa855c29bd24d59f Mon Sep 17 00:00:00 2001
From: =?utf8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Wed, 15 Feb 2017 11:37:57 +0100
Subject: [PATCH] Set errno when refusing to send packet in
 interface_send_packet
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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>
---
 interface.c | 1 +
 1 file changed, 1 insertion(+)

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;
 	}
 
-- 
2.25.1