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BGP: Add BGP-LS BGP Egress Peer Engineering (rfc9086)

This commit is contained in:
Taisuke Sasaki 2021-09-21 13:32:20 +00:00 committed by Wireshark GitLab Utility
parent 7866f43d82
commit b9687f7d85
1 changed files with 123 additions and 1 deletions
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124
epan/dissectors/packet-bgp.c
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@ -733,6 +733,7 @@ static dissector_handle_t bgp_handle;
#define BGP_LS_NLRI_PROTO_ID_OSPF 3
#define BGP_LS_NLRI_PROTO_ID_DIRECT 4
#define BGP_LS_NLRI_PROTO_ID_STATIC 5
#define BGP_LS_NLRI_PROTO_ID_BGP 7
/* Link-State routing universes */
#define BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_3 0
@ -764,6 +765,7 @@ static dissector_handle_t bgp_handle;
#define BGP_NLRI_TLV_BGP_LS_IDENTIFIER 513
#define BGP_NLRI_TLV_AREA_ID 514
#define BGP_NLRI_TLV_IGP_ROUTER_ID 515
#define BGP_NLRI_TLV_BGP_ROUTER_ID 516
#define BGP_NLRI_TLV_NODE_FLAG_BITS 1024
#define BGP_NLRI_TLV_OPAQUE_NODE_PROPERTIES 1025
@ -834,6 +836,9 @@ static dissector_handle_t bgp_handle;
#define BGP_LS_SR_TLV_FLEX_ALGO_INC_ALL_AFFINITY 1042
#define BGP_LS_SR_TLV_ADJ_SID 1099
#define BGP_LS_SR_TLV_LAN_ADJ_SID 1100
#define BGP_LS_SR_TLV_PEER_NODE_SID 1101
#define BGP_LS_SR_TLV_PEER_ADJ_SID 1102
#define BGP_LS_SR_TLV_PEER_SET_SID 1103
#define BGP_LS_SR_TLV_PREFIX_SID 1158
#define BGP_LS_SR_TLV_RANGE 1159
#define BGP_LS_SR_TLV_BINDING_SID 1160
@ -905,6 +910,18 @@ static dissector_handle_t bgp_handle;
#define BGP_LS_SR_ADJACENCY_SID_FLAG_SO 0x10
#define BGP_LS_SR_ADJACENCY_SID_FLAG_SI 0x08
/* BGP Peering SIDs TLV flags, rfc9086:
0 1 2 3 4 5 6 7
+--+--+--+--+--+--+--+--+
|V |L |B |P | | | | | rfc9086
+--+--+--+--+--+--+--+--+
*/
#define BGP_LS_SR_PEER_SID_FLAG_V 0x80
#define BGP_LS_SR_PEER_SID_FLAG_L 0x40
#define BGP_LS_SR_PEER_SID_FLAG_B 0x20
#define BGP_LS_SR_PEER_SID_FLAG_P 0x10
/* SR-Capabilities TLV flags, draft-gredler-idr-bgp-ls-segment-routing-ext-01:
0 1 2 3 4 5 6 7
@ -1736,6 +1753,7 @@ static const value_string link_state_nlri_protocol_id_values[] = {
{BGP_LS_NLRI_PROTO_ID_OSPF, "OSPF"},
{BGP_LS_NLRI_PROTO_ID_DIRECT, "Direct"},
{BGP_LS_NLRI_PROTO_ID_STATIC, "Static"},
{BGP_LS_NLRI_PROTO_ID_BGP, "BGP"},
{0, NULL},
};
@ -2392,6 +2410,17 @@ static int hf_bgp_ls_sr_tlv_adjacency_sid_flags_so = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_weight = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_label = -1;
static int hf_bgp_ls_sr_tlv_adjacency_sid_index = -1;
static int hf_bgp_ls_sr_tlv_peer_node_sid = -1; /* 1101 */
static int hf_bgp_ls_sr_tlv_peer_adj_sid = -1; /* 1102 */
static int hf_bgp_ls_sr_tlv_peer_set_sid = -1; /* 1103 */
static int hf_bgp_ls_sr_tlv_peer_sid_flags = -1;
static int hf_bgp_ls_sr_tlv_peer_sid_flags_v = -1;
static int hf_bgp_ls_sr_tlv_peer_sid_flags_l = -1;
static int hf_bgp_ls_sr_tlv_peer_sid_flags_b = -1;
static int hf_bgp_ls_sr_tlv_peer_sid_flags_p = -1;
static int hf_bgp_ls_sr_tlv_peer_sid_weight = -1;
static int hf_bgp_ls_sr_tlv_peer_sid_label = -1;
static int hf_bgp_ls_sr_tlv_peer_sid_index = -1;
static int hf_bgp_ls_sr_tlv_prefix_attr_flags = -1; /* 1170 */
static int hf_bgp_ls_sr_tlv_prefix_attr_flags_flags = -1;
static int hf_bgp_ls_sr_tlv_prefix_attr_flags_flags_unknown= -1;
@ -2427,6 +2456,8 @@ static int hf_bgp_ls_tlv_area_id = -1; /* 514 */
static int hf_bgp_ls_tlv_area_id_id = -1;
static int hf_bgp_ls_tlv_igp_router = -1; /* 515 */
static int hf_bgp_ls_tlv_igp_router_id = -1;
static int hf_bgp_ls_tlv_bgp_router_id = -1; /* 516 */
static int hf_bgp_ls_tlv_bgp_router_id_id = -1;
static int hf_bgp_ls_tlv_node_flags_bits = -1; /* 1024 */
static int hf_bgp_ls_tlv_opaque_node_properties = -1; /* 1025 */
@ -4522,8 +4553,15 @@ static int decode_bgp_link_node_descriptor(tvbuff_t *tvb, proto_tree *tree, gint
proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_igp_router_id, tvb, offset + 4, sub_length, ENC_NA);
break;
case BGP_NLRI_TLV_BGP_ROUTER_ID:
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_bgp_router_id, tvb, offset, sub_length+4, ENC_NA);
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_mp_reach_nlri);
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);
proto_tree_add_item(tlv_tree, hf_bgp_ls_tlv_bgp_router_id_id, tvb, offset + 4, sub_length, ENC_NA);
break;
default:
expert_add_info_format(pinfo, tree, &ei_bgp_ls_error, "Undefined node Descriptor Sub-TLV type (%u)!", type);
expert_add_info_format(pinfo, tree, &ei_bgp_ls_warn, "Undefined node Descriptor Sub-TLV type (%u)!", type);
}
length -= 4 + sub_length;
@ -5512,6 +5550,51 @@ decode_link_state_attribute_tlv(proto_tree *tree, tvbuff_t *tvb, gint offset, pa
case BGP_LS_SR_TLV_LAN_ADJ_SID:
break;
case BGP_LS_SR_TLV_PEER_NODE_SID:
case BGP_LS_SR_TLV_PEER_ADJ_SID:
case BGP_LS_SR_TLV_PEER_SET_SID:
{
/*
0 1 2 3 4 5 6 7
+--+--+--+--+--+--+--+--+
|V |L |B |P | | | | | rfc9086
+--+--+--+--+--+--+--+--+
*/
static int * const peer_sid_flags[] = {
&hf_bgp_ls_sr_tlv_peer_sid_flags_v,
&hf_bgp_ls_sr_tlv_peer_sid_flags_l,
&hf_bgp_ls_sr_tlv_peer_sid_flags_b,
&hf_bgp_ls_sr_tlv_peer_sid_flags_p,
NULL
};
tlv_item = proto_tree_add_item(tree,
(type == BGP_LS_SR_TLV_PEER_NODE_SID ?
hf_bgp_ls_sr_tlv_peer_node_sid :
(type == BGP_LS_SR_TLV_PEER_ADJ_SID ?
hf_bgp_ls_sr_tlv_peer_adj_sid :
hf_bgp_ls_sr_tlv_peer_set_sid)),
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);
ti = proto_tree_add_item(tlv_tree, hf_bgp_ls_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
if (length != 7 && length != 8) {
expert_add_info_format(pinfo, ti, &ei_bgp_ls_error,
"Unexpected TLV Length (%u) in BGP-LS Peer SID TLV, it must be either 7 or 8 bytes!",
length);
break;
}
proto_tree_add_bitmask(tlv_tree, tvb, offset + 4, hf_bgp_ls_sr_tlv_peer_sid_flags,
ett_bgp_link_state, peer_sid_flags, ENC_BIG_ENDIAN);
proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_peer_sid_weight, tvb, offset + 5, 1, ENC_BIG_ENDIAN);
if (length == 7) {
proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_peer_sid_label, tvb, offset + 8, 3, ENC_BIG_ENDIAN);
} else {
proto_tree_add_item(tlv_tree, hf_bgp_ls_sr_tlv_peer_sid_index, tvb, offset + 8, 4, ENC_BIG_ENDIAN);
}
}
break;
case BGP_LS_APP_SPEC_LINK_ATTR:
tlv_item = proto_tree_add_item(tree, hf_bgp_ls_tlv_app_spec_link_attrs, tvb, offset, length + 4, ENC_NA);
tlv_tree = proto_item_add_subtree(tlv_item, ett_bgp_link_state);
@ -12308,6 +12391,12 @@ proto_register_bgp(void)
{ &hf_bgp_ls_tlv_igp_router_id,
{ "IGP ID", "bgp.ls.tlv.igp_router_id", FT_BYTES,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_tlv_bgp_router_id,
{ "BGP Router-ID TLV", "bgp.ls.tlv.bgp_router_id", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_tlv_bgp_router_id_id,
{ "BGP Router-ID", "bgp.ls.tlv.bgp_router_id.id", FT_IPv4,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_tlv_node_flags_bits,
{ "Node Flags Bits TLV", "bgp.ls.tlv.node_flags_bits", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
@ -12655,6 +12744,39 @@ proto_register_bgp(void)
{ &hf_bgp_ls_sr_tlv_adjacency_sid_index,
{ "SID/Index", "bgp.ls.sr.tlv.adjacency.sid.index", FT_UINT32,
BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_node_sid,
{ "PeerNode SID TLV", "bgp.ls.sr.tlv.peer_node.sid", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_adj_sid,
{ "PeerAdj SID TLV", "bgp.ls.sr.tlv.peer_adj.sid", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_set_sid,
{ "PeerSet SID TLV", "bgp.ls.sr.tlv.peer_set.sid", FT_NONE,
BASE_NONE, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_flags,
{ "Flags", "bgp.ls.sr.tlv.peer.sid.flags", FT_UINT8,
BASE_HEX, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_flags_v,
{ "Value flag (V)", "bgp.ls.sr.tlv.peer.sid.flags.v", FT_BOOLEAN,
8, TFS(&tfs_set_notset), BGP_LS_SR_PEER_SID_FLAG_V, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_flags_l,
{ "Local flag (L)", "bgp.ls.sr.tlv.peer.sid.flags.l", FT_BOOLEAN,
8, TFS(&tfs_set_notset), BGP_LS_SR_PEER_SID_FLAG_L, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_flags_b,
{ "Backup flag (B)", "bgp.ls.sr.tlv.peer.sid.flags.b", FT_BOOLEAN,
8, TFS(&tfs_set_notset), BGP_LS_SR_PEER_SID_FLAG_B, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_flags_p,
{ "Persistent flag (P)", "bgp.ls.sr.tlv.peer.sid.flags.p", FT_BOOLEAN,
8, TFS(&tfs_set_notset), BGP_LS_SR_PEER_SID_FLAG_P, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_weight,
{ "Weight", "bgp.ls.sr.tlv.peer.sid.weight", FT_UINT8,
BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_label,
{ "SID/Label", "bgp.ls.sr.tlv.peer.sid.label", FT_UINT24,
BASE_DEC, NULL, 0x0FFFFF, NULL, HFILL}},
{ &hf_bgp_ls_sr_tlv_peer_sid_index,
{ "SID/Index", "bgp.ls.sr.tlv.peer.sid.index", FT_UINT32,
BASE_DEC, NULL, 0x0, NULL, HFILL}},
{ &hf_bgp_ls_igp_te_metric_flags,
{ "TE Metric Flags", "bgp.ls.igp_te_metric.flags", FT_UINT8,
BASE_HEX, NULL, 0x0, NULL, HFILL}},