move to run-time error instead of build error

FreeBSD has IP_RECVIF, not SO_BINDTODEVICE.  And IP_RECVIF only
works for datagram sockets, and has to be used with recvmsg()

So until we get that code working, just disallow binding to an
interface.

diff --git a/src/lib/bio/fd_open.c b/src/lib/bio/fd_open.c
index 246a9fa4455e3e384dc3805df9ae5cb0f6434046..366fee7d81587f63ee4a5b6a2ba9f4fa9736f744 100644 (file)
--- a/src/lib/bio/fd_open.c
+++ b/src/lib/bio/fd_open.c
@@ -628,19 +628,19 @@ static int fr_bio_fd_socket_bind_to_device(fr_bio_fd_t *my, UNUSED fr_bio_fd_con
 }
 #else
 
-#error This system is missing SO_BINDTODEVICE, IP_BOUND_IF, IPV6_BOUND_IF
-
-/** ??? Who knows?
+/** This system is missing SO_BINDTODEVICE, IP_BOUND_IF, IPV6_BOUND_IF
+ *
+ *     @todo - FreeBSD IP_RECVIF and IP_SENDIF
+ *
+ *     Except that has to be done in recvmsg() and sendmsg().  And it only works on datagram sockets.
  *
+ *     cmsg_len = sizeof(struct sockaddr_dl)
+ *     cmsg_level = IPPROTO_IP
+ *     cmsg_type = IP_RECVIF
  */
 static int fr_bio_fd_socket_bind_to_device(fr_bio_fd_t *my, fr_bio_fd_config_t const *cfg)
 {
-       /*
-        *      @todo - see fr_socket_bind().  Troll through the interfaces to see which interface has a name
-        *      which matches the named interface.  If so, copy over it's IP to our src_ip, so long as src_ip
-        *      is INADDR_ANY.
-        */
-
+       fr_sterror_const("Bind to interface is not supported on this platform");
        return -1;
 }