diff options
| -rw-r--r-- | isisd/isis_pdu.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/isisd/isis_pdu.c b/isisd/isis_pdu.c index dad39bcda..a4fe65af4 100644 --- a/isisd/isis_pdu.c +++ b/isisd/isis_pdu.c @@ -566,6 +566,17 @@ process_p2p_hello (struct isis_circuit *circuit) * the circuit */ adj = circuit->u.p2p.neighbor; + /* If an adjacency exists, check it is with the source of the hello + * packets */ + if (adj) + { + if (memcmp(hdr->source_id, adj->sysid, ISIS_SYS_ID_LEN)) + { + zlog_debug("hello source and adjacency do not match, set adj down\n"); + isis_adj_state_change (adj, ISIS_ADJ_DOWN, "adj do not exist"); + return 0; + } + } if (!adj || adj->level != hdr->circuit_t) { if (!adj) |