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bgpd: skip unsupported PREFIX_SID sub-type

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This commit make bgpd to skip and ignore unsupported
sub-type of PREFIX_SID. (especially new defined sub-type)
Current bgpd can't parase unsupported sub-type of PREFIX_SID.
PREFIX_SID is drafted on draft-ietf-idr-bgp-prefix-sid-27.
There are already new sub-type drafted on
draft-dawra-idr-srv6-vpn-05. (Type5,6 is new defined.)
This commit fix the problem reported as #5277 on GitBub.

Signed-off-by: Hiroki Shirokura <slank.dev@gmail.com>
This commit is contained in:
Hiroki Shirokura 2019-11-04 17:33:50 +00:00
parent e536181ef0
commit c6ca155d73
2 changed files with 17 additions and 0 deletions
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15
bgpd/bgp_attr.c
View File

@ -2234,6 +2234,21 @@ static bgp_attr_parse_ret_t bgp_attr_psid_sub(int32_t type,
}
}
/*
* Placeholder code for Unsupported TLV
* - SRv6 L3 Service TLV (type5)
* - SRv6 L2 Service TLV (type6)
*/
else if (type == BGP_PREFIX_SID_SRV6_L3_SERVICE
|| type == BGP_PREFIX_SID_SRV6_L2_SERVICE) {
if (bgp_debug_update(peer, NULL, NULL, 1))
zlog_debug(
"%s attr Prefix-SID sub-type=%u is not supported, skipped",
peer->host, type);
for (int i = 0; i < length; i++)
stream_getc(peer->curr);
}
return BGP_ATTR_PARSE_PROCEED;
}

2
bgpd/bgp_attr.h
View File

@ -62,6 +62,8 @@
#define BGP_PREFIX_SID_LABEL_INDEX 1
#define BGP_PREFIX_SID_IPV6 2
#define BGP_PREFIX_SID_ORIGINATOR_SRGB 3
#define BGP_PREFIX_SID_SRV6_L3_SERVICE 5
#define BGP_PREFIX_SID_SRV6_L2_SERVICE 6
#define BGP_PREFIX_SID_LABEL_INDEX_LENGTH 7
#define BGP_PREFIX_SID_IPV6_LENGTH 19