From: Hans Dedecker <dedeckeh@gmail.com>
Date: Sun, 1 Dec 2013 17:55:11 +0000 (+0100)
Subject: Basic error checking when initializing ra
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1234ab04386fd63eafb19ecf245b730d6461e869;p=project%2Fodhcp6c.git

Basic error checking when initializing ra
---

diff --git a/src/ra.c b/src/ra.c
index c8ccb88..64cc8d8 100644
--- a/src/ra.c
+++ b/src/ra.c
@@ -59,13 +59,23 @@ int ra_init(const char *ifname, const struct in6_addr *ifid)
 {
 	const pid_t ourpid = getpid();
 	sock = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
+	if (sock < 0)
+		return -1;
+
 	if_index = if_nametoindex(ifname);
+	if (!if_index)
+		return -1;
+
 	strncpy(if_name, ifname, sizeof(if_name) - 1);
 	lladdr = *ifid;
 
 	rtnl = socket(AF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_ROUTE);
+	if (rtnl < 0)
+		return -1;
+
 	struct sockaddr_nl rtnl_kernel = { .nl_family = AF_NETLINK };
-	connect(rtnl, (const struct sockaddr*)&rtnl_kernel, sizeof(rtnl_kernel));
+	if (connect(rtnl, (const struct sockaddr*)&rtnl_kernel, sizeof(rtnl_kernel)) < 0)
+		return -1;
 
 	int val = RTNLGRP_LINK;
 	setsockopt(rtnl, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &val, sizeof(val));