From: Eric Leblond <eric@regit.org>
Date: Thu, 10 Apr 2014 09:05:46 +0000 (+0200)
Subject: util-ioctl: only get MTU when iface name is set
X-Git-Tag: suricata-2.0.1rc1~53
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6e77c4d1b41e0a4be65979ef6b2176bc67c66a4a;p=thirdparty%2Fsuricata.git

util-ioctl: only get MTU when iface name is set

This patch fixes a warning message when suricata is started without
giving an interface name on the command line. The code was trying
to get the MTU even if pcap_dev was not set.
---

diff --git a/src/util-ioctl.c b/src/util-ioctl.c
index 4b2923a32b..0f144ec511 100644
--- a/src/util-ioctl.c
+++ b/src/util-ioctl.c
@@ -117,7 +117,12 @@ int GetIfaceMTU(char *pcap_dev)
 int GetIfaceMaxPacketSize(char *pcap_dev)
 {
     int ll_header = GetIfaceMaxHWHeaderLength(pcap_dev);
-    int mtu = GetIfaceMTU(pcap_dev);
+    int mtu = 0;
+
+    if ((pcap_dev == NULL) || strlen(pcap_dev) == 0)
+        return 0;
+
+    mtu = GetIfaceMTU(pcap_dev);
     switch (mtu) {
         case 0:
         case -1: