From 3acc850083240edbc14ddbc7fe6a556fbce5e295 Mon Sep 17 00:00:00 2001 From: Richard Fuchs Date: Thu, 9 Apr 2015 09:49:50 -0400 Subject: [PATCH] zero-fill padding bytes --- daemon/stun.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/daemon/stun.c b/daemon/stun.c index 85ac584ea..3a5de6273 100644 --- a/daemon/stun.c +++ b/daemon/stun.c @@ -271,6 +271,11 @@ INLINE void __output_add(struct msghdr *mh, struct tlv *tlv, unsigned int len, u iov = &mh->msg_iov[mh->msg_iovlen++]; iov->iov_base = append; /* must have space for padding */ iov->iov_len = (append_len + 3) & 0xfffc; + + if ((append_len & 0x3)) { + if (memcmp(append + append_len, "\0\0\0", 4 - (append_len & 0x3))) + memset(append + append_len, 0, 4 - (append_len & 0x3)); + } } }