diff options
| -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 8c9052a3..a511e88e 100644 --- a/sysdep/unix/io.c +++ b/sysdep/unix/io.c @@ -1566,7 +1566,9 @@ sk_sendmsg(sock *s) }; #ifdef CONFIG_DONTROUTE_UNICAST - if (ipa_is_ip4(s->daddr) && ip4_is_unicast(ipa_to_ip4(s->daddr))) + /* FreeBSD silently changes TTL to 1 when MSG_DONTROUTE is used, therefore we + cannot use it for other cases (e.g. when TTL security is used). */ + if (ipa_is_ip4(s->daddr) && ip4_is_unicast(ipa_to_ip4(s->daddr)) && (s->ttl == 1)) flags = MSG_DONTROUTE; #endif |