diff options
Diffstat (limited to 'bgpd/bgp_attr.c')
| -rw-r--r-- | bgpd/bgp_attr.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c index b463b3c0..dd3cc965 100644 --- a/bgpd/bgp_attr.c +++ b/bgpd/bgp_attr.c @@ -892,7 +892,8 @@ bgp_attr_as4_path (struct peer *peer, bgp_size_t length, *as4_path = aspath_parse (peer->ibuf, length, 1); /* Set aspath attribute flag. */ - attr->flag |= ATTR_FLAG_BIT (BGP_ATTR_AS4_PATH); + if (as4_path) + attr->flag |= ATTR_FLAG_BIT (BGP_ATTR_AS4_PATH); return 0; } @@ -1126,10 +1127,10 @@ bgp_attr_munge_as4_attrs (struct peer *peer, struct attr *attr, */ if (attr->flag & (ATTR_FLAG_BIT (BGP_ATTR_AS4_AGGREGATOR) ) ) { - assert (attre); - if ( attr->flag & (ATTR_FLAG_BIT (BGP_ATTR_AGGREGATOR) ) ) { + assert (attre); + /* received both. * if the as_number in aggregator is not AS_TRANS, * then AS4_AGGREGATOR and AS4_PATH shall be ignored @@ -1170,7 +1171,7 @@ bgp_attr_munge_as4_attrs (struct peer *peer, struct attr *attr, zlog_debug ("[AS4] %s BGP not AS4 capable peer send" " AS4_AGGREGATOR but no AGGREGATOR, will take" " it as if AGGREGATOR with AS_TRANS had been there", peer->host); - attre->aggregator_as = as4_aggregator; + (attre = bgp_attr_extra_get (attr))->aggregator_as = as4_aggregator; /* sweep it under the carpet and simulate a "good" AGGREGATOR */ attr->flag |= (ATTR_FLAG_BIT (BGP_ATTR_AGGREGATOR)); } @@ -1543,6 +1544,21 @@ bgp_attr_parse (struct peer *peer, struct attr *attr, bgp_size_t size, flag = stream_getc (BGP_INPUT (peer)); type = stream_getc (BGP_INPUT (peer)); + /* Check whether Extended-Length applies and is in bounds */ + if (CHECK_FLAG (flag, BGP_ATTR_FLAG_EXTLEN) + && ((endp - startp) < (BGP_ATTR_MIN_LEN + 1))) + { + zlog (peer->log, LOG_WARNING, + "%s Extended length set, but just %u bytes of attr header", + peer->host, + (unsigned long) (endp - STREAM_PNT (BGP_INPUT (peer)))); + + bgp_notify_send (peer, + BGP_NOTIFY_UPDATE_ERR, + BGP_NOTIFY_UPDATE_ATTR_LENG_ERR); + return -1; + } + /* Check extended attribue length bit. */ if (CHECK_FLAG (flag, BGP_ATTR_FLAG_EXTLEN)) length = stream_getw (BGP_INPUT (peer)); |