BSD: Workaround for direct routes on FreeBSD 13.0

FreeBSD 13.0 added some safechecks for syscalls, rejecting sockaddrs that
are too small, later versions loosen up the check.

1 files changed, 4 insertions, 0 deletions

diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index 256c4ed0..47f5cf59 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -190,6 +190,10 @@ static inline void
 sockaddr_fill_dl(struct sockaddr_dl *sa, struct iface *ifa)
 {
   uint len = OFFSETOF(struct sockaddr_dl, sdl_data);
+
+  /* Workaround for FreeBSD 13.0 */
+  len = MAX(len, sizeof(struct sockaddr));
+
   memset(sa, 0, len);
   sa->sdl_len = len;
   sa->sdl_family = AF_LINK;