basic valid_rdomain() implementation for Linux
diff --git a/openbsd-compat/port-net.c b/openbsd-compat/port-net.c
index f6e32ad..efc9f46 100644
--- a/openbsd-compat/port-net.c
+++ b/openbsd-compat/port-net.c
@@ -76,7 +76,22 @@
int
valid_rdomain(const char *name)
{
- return 0;
+ int fd;
+
+ /*
+ * This is a pretty crappy way to test. It would be better to
+ * check whether "name" represents a VRF device, but apparently
+ * that requires an rtnetlink transaction.
+ */
+ if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
+ return 0;
+ if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
+ name, strlen(name)) == -1) {
+ close(fd);
+ return 0;
+ }
+ close(fd);
+ return 1;
}
#elif defined(SYS_RDOMAIN_XXX)
/* XXX examples */