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BGP: Add RFC 9104 Extended Administrative Groups 

Added support for RFC 9104 "Distribution of Traffic Engineering
Extended Administrative Groups Using the Border Gateway Protocol
- Link State (BGP-LS)"
This commit is contained in:
Uli Heilmeier 2021-09-11 21:23:48 +02:00 committed by Wireshark GitLab Utility
parent 902b614fe2
commit 2d08611d54
1 changed files with 28 additions and 0 deletions
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28
epan/dissectors/packet-bgp.c
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@ -51,6 +51,8 @@
* draft-ietf-idr-segment-routing-te-policy-08
* draft-yu-bess-evpn-l2-attributes-04
* draft-ietf-bess-srv6-services-05
* RFC9104 Distribution of Traffic Engineering Extended Administrative Groups
Using the Border Gateway Protocol - Link State
* TODO:
* Destination Preference Attribute for BGP (work in progress)
@ -790,6 +792,7 @@ static dissector_handle_t bgp_handle;
#define BGP_NLRI_TLV_PREFIX_METRIC 1155
#define BGP_NLRI_TLV_OSPF_FORWARDING_ADDRESS 1156
#define BGP_NLRI_TLV_OPAQUE_PREFIX_ATTRIBUTE 1157
#define BGP_NLRI_TLV_EXTENDED_ADMINISTRATIVE_GROUP 1173
/* Link-State NLRI TLV lengths */
@ -2432,6 +2435,8 @@ static int hf_bgp_ls_ospf_forwarding_address_ipv4_address = -1;
static int hf_bgp_ls_ospf_forwarding_address_ipv6_address = -1;
static int hf_bgp_ls_opaque_prefix_attribute = -1; /* 1157 */
static int hf_bgp_ls_opaque_prefix_attribute_value = -1;
static int hf_bgp_ls_extended_administrative_group = -1; /* 1173 */
static int hf_bgp_ls_extended_administrative_group_value = -1;
/* Link Protection Types */
@ -5483,6 +5488,23 @@ decode_link_state_attribute_tlv(proto_tree *tree, tvbuff_t *tvb, gint offset, pa
proto_tree_add_item(tlv_tree, hf_bgp_ls_opaque_prefix_attribute_value, tvb, offset + 4, length, ENC_NA);
break;
case BGP_NLRI_TLV_EXTENDED_ADMINISTRATIVE_GROUP:
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_extended_administrative_group, tvb, offset, length+4, ENC_NA);
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
proto_tree_add_item(tlv_tree, hf_bgp_ls_type, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
if(length % 4 != 0) {
expert_add_info_format(pinfo, tlv_tree, &ei_bgp_ls_error, "Unexpected Extended Administrative Group TLV's length (%u mod 4 != 0)",
length);
break;
}
tmp16 = length;
while(tmp16){
proto_tree_add_item(tlv_tree, hf_bgp_ls_extended_administrative_group_value, tvb, offset + 4 + (length - tmp16), 4, ENC_NA);
tmp16 -= 4;
}
break;
case BGP_LS_SR_TLV_PREFIX_SID:
{
/*
@ -12095,6 +12117,12 @@ proto_register_bgp(void)
{ &hf_bgp_ls_opaque_prefix_attribute_value,
{ "Opaque prefix attributes", "bgp.ls.tlv.opaque_prefix_attribute_value", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_extended_administrative_group,
{ "Extended Administrative Group TLV", "bgp.ls.tlv.extended_administrative_group", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_extended_administrative_group_value,
{ "Extended Administrative Group", "bgp.ls.tlv.extended_administrative_group_value", FT_BYTES,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_tlv_igp_router,
{ "IGP Router-ID", "bgp.ls.tlv.igp_router", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},