diff options
Diffstat (limited to 'src/openvpn/socket.c')
| -rw-r--r-- | src/openvpn/socket.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/openvpn/socket.c b/src/openvpn/socket.c index 708903c..23566f1 100644 --- a/src/openvpn/socket.c +++ b/src/openvpn/socket.c @@ -2801,11 +2801,11 @@ link_socket_write_udp_posix_sendmsg (struct link_socket *sock, mesg.msg_name = &to->dest.addr.sa; mesg.msg_namelen = sizeof (struct sockaddr_in); mesg.msg_control = &opi; - mesg.msg_controllen = sizeof (struct openvpn_in4_pktinfo); mesg.msg_flags = 0; +#ifdef HAVE_IN_PKTINFO + mesg.msg_controllen = sizeof (struct openvpn_in4_pktinfo); cmsg = CMSG_FIRSTHDR (&mesg); cmsg->cmsg_len = sizeof (struct openvpn_in4_pktinfo); -#ifdef HAVE_IN_PKTINFO cmsg->cmsg_level = SOL_IP; cmsg->cmsg_type = IP_PKTINFO; { @@ -2816,6 +2816,10 @@ link_socket_write_udp_posix_sendmsg (struct link_socket *sock, pkti->ipi_addr.s_addr = 0; } #elif defined(IP_RECVDSTADDR) + ASSERT( CMSG_SPACE(sizeof (struct in_addr)) <= sizeof(opi) ); + mesg.msg_controllen = CMSG_SPACE(sizeof (struct in_addr)); + cmsg = CMSG_FIRSTHDR (&mesg); + cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_addr)); cmsg->cmsg_level = IPPROTO_IP; cmsg->cmsg_type = IP_RECVDSTADDR; *(struct in_addr *) CMSG_DATA (cmsg) = to->pi.in4; |