commit 1579a67f130ca34df9acefac14ebcdfdd8f6600a
author Christian Franke <chris@opensourcerouting.org> Fri Mar 08 02:35:38 2013 +0100
committer David Lamparter <equinox@opensourcerouting.org> Wed Nov 20 10:35:59 2013 +0100
tree 8c12770a8628fc786e08c08a125114f7d56b66d4
parent 7d4aa1d57d54a57aae78e6b12cf4524e2c43a514

ospf6d: set cmsg size correctly

On both Linux and FreeBSD, msg_controllen should be set to
CMSG_LEN, not CMSG_SPACE. This avoids sending 4 bytes of
trailing garbage to the kernel.

Signed-off-by: Christian Franke <chris@opensourcerouting.org>

ospf6d/ospf6_network.c

diff --git a/ospf6d/ospf6_network.c b/ospf6d/ospf6_network.c
index eed7f9d..74cfbec 100644
--- a/ospf6d/ospf6_network.c
+++ b/ospf6d/ospf6_network.c
@@ -206,7 +206,7 @@
   smsghdr.msg_name = (caddr_t) &dst_sin6;
   smsghdr.msg_namelen = sizeof (struct sockaddr_in6);
   smsghdr.msg_control = (caddr_t) cmsgbuf;
-  smsghdr.msg_controllen = sizeof (cmsgbuf);
+  smsghdr.msg_controllen = scmsgp->cmsg_len;
 
   retval = sendmsg (ospf6_sock, &smsghdr, 0);
   if (retval != iov_totallen (message))