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bgpd: check MULTI_EXIT_DISC attr flags (BZ#677)

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* bgp_attr.c
  * bgp_attr_med(): add checks for "optional", "transitive" and
    "partial" bits, log each error condition independently
This commit is contained in:
Denis Ovsienko 2011-09-20 10:54:25 +04:00
parent d0511bd9b0
commit 7d25f1883f
1 changed files with 32 additions and 0 deletions
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32
bgpd/bgp_attr.c
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@ -942,6 +942,38 @@ bgp_attr_med (struct peer *peer, bgp_size_t length,
total = length + (CHECK_FLAG (flag, BGP_ATTR_FLAG_EXTLEN) ? 4 : 3);
/* Flag checks. */
if (! CHECK_FLAG (flag, BGP_ATTR_FLAG_OPTIONAL))
{
zlog (peer->log, LOG_ERR,
"MULTI_EXIT_DISC attribute must be flagged as \"optional\" (%u)", flag);
bgp_notify_send_with_data (peer,
BGP_NOTIFY_UPDATE_ERR,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
return -1;
}
if (CHECK_FLAG (flag, BGP_ATTR_FLAG_TRANS))
{
zlog (peer->log, LOG_ERR,
"MULTI_EXIT_DISC attribute must not be flagged as \"transitive\" (%u)", flag);
bgp_notify_send_with_data (peer,
BGP_NOTIFY_UPDATE_ERR,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
return -1;
}
if (CHECK_FLAG (flag, BGP_ATTR_FLAG_PARTIAL))
{
zlog (peer->log, LOG_ERR,
"MULTI_EXIT_DISC attribute must not be flagged as \"partial\" (%u)", flag);
bgp_notify_send_with_data (peer,
BGP_NOTIFY_UPDATE_ERR,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
return -1;
}
/* Length check. */
if (length != 4)
{