diff options
| author | Ondrej Zajicek (work) <santiago@crfreenet.org> | 2018-07-28 16:54:06 +0200 |
|---|---|---|
| committer | Ondrej Zajicek (work) <santiago@crfreenet.org> | 2018-07-28 19:30:56 +0200 |
| commit | 6be71641ef3baa8658d031f3624f4481b493bdaf (patch) | |
| tree | 4d2064ba61b1460bad4aa47a820e99ced14976b9 /sysdep/unix/io.c | |
| parent | 3140c8b2ca48263da1a1f12b478031dc4b572db7 (diff) | |
BSD: Use MSG_DONTROUTE for unicast packets on FreeBSD
BSD systems cannot use SO_DONTROUTE, because it does not work properly
with multicast packets (perhaps it tries to find iface based on multicast
group address). But we can use MSG_DONTROUTE sendmsg() flag for unicast
packets. Works on FreeBSD, is ignored on OpenBSD and is broken on NetBSD
(i guess due to integrated routing table and ARP table).
Diffstat (limited to 'sysdep/unix/io.c')
| -rw-r--r-- | sysdep/unix/io.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdep/unix/io.c b/sysdep/unix/io.c index 53a37a50..786c6a56 100644 --- a/sysdep/unix/io.c +++ b/sysdep/unix/io.c @@ -1574,6 +1574,7 @@ sk_sendmsg(sock *s) struct iovec iov = {s->tbuf, s->tpos - s->tbuf}; byte cmsg_buf[CMSG_TX_SPACE]; sockaddr dst; + int flags = 0; sockaddr_fill(&dst, s->af, s->daddr, s->iface, s->dport); @@ -1584,6 +1585,11 @@ sk_sendmsg(sock *s) .msg_iovlen = 1 }; +#ifdef CONFIG_DONTROUTE_UNICAST + if (ipa_is_ip4(s->daddr) && ip4_is_unicast(ipa_to_ip4(s->daddr))) + flags = MSG_DONTROUTE; +#endif + #ifdef CONFIG_USE_HDRINCL byte hdr[20]; struct iovec iov2[2] = { {hdr, 20}, iov }; @@ -1599,7 +1605,7 @@ sk_sendmsg(sock *s) if (s->flags & SKF_PKTINFO) sk_prepare_cmsgs(s, &msg, cmsg_buf, sizeof(cmsg_buf)); - return sendmsg(s->fd, &msg, 0); + return sendmsg(s->fd, &msg, flags); } static inline int |