Babel: Fix handling of missing IPv4 next hops

In case of missing IPv4 next hop, we should skip such routes
on transmit and ignore such routes on receive.

Thanks to Julian Schuh for the bugreport and Toke Hoiland-Jorgensen
for the original patch.

1 files changed, 1 insertions, 1 deletions

diff --git a/proto/babel/packets.c b/proto/babel/packets.c
index 59678678..d4ecf649 100644
--- a/proto/babel/packets.c
+++ b/proto/babel/packets.c
@@ -616,7 +616,7 @@ babel_read_update(struct babel_tlv *hdr, union babel_msg *m,
 
     /* Update must have next hop, unless it is retraction */
     if (ipa_zero(state->next_hop_ip4) && (msg->metric != BABEL_INFINITY))
-      return PARSE_ERROR;
+      return PARSE_IGNORE;
 
     /* Merge saved prefix and received prefix parts */
     memcpy(buf, state->def_ip4_prefix, tlv->omitted);