diff options
Diffstat (limited to 'sysdep/unix/io.c')
| -rw-r--r-- | sysdep/unix/io.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c index 5a0c07e5..a5477695 100644 --- a/sysdep/unix/io.c +++ b/sysdep/unix/io.c @@ -705,6 +705,7 @@ sk_prepare_cmsgs6(sock *s, struct msghdr *msg, void *cbuf, size_t cbuflen) { struct cmsghdr *cm; struct in6_pktinfo *pi; + int controllen = 0; msg->msg_control = cbuf; msg->msg_controllen = cbuflen; @@ -713,12 +714,13 @@ sk_prepare_cmsgs6(sock *s, struct msghdr *msg, void *cbuf, size_t cbuflen) cm->cmsg_level = SOL_IPV6; cm->cmsg_type = IPV6_PKTINFO; cm->cmsg_len = CMSG_LEN(sizeof(*pi)); + controllen += CMSG_SPACE(sizeof(*pi)); pi = (struct in6_pktinfo *) CMSG_DATA(cm); pi->ipi6_ifindex = s->iface ? s->iface->index : 0; pi->ipi6_addr = ipa_to_in6(s->saddr); - msg->msg_controllen = cm->cmsg_len; + msg->msg_controllen = controllen; } |