/* packet-bmp.c * Routines for BMP packet dissection * (c) Copyright Ebben Aries * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /* * Supports: * draft-ietf-grow-bmp-07 BGP Monitoring Protocol * */ #include "config.h" #include #include #include "packet-tcp.h" #include "packet-bgp.h" void proto_register_bmp(void); void proto_reg_handoff_bmp(void); #define FRAME_HEADER_LEN 5 /* BMP Common Header Message Types */ #define BMP_MSG_TYPE_ROUTE_MONITORING 0x00 /* Route Monitoring */ #define BMP_MSG_TYPE_STAT_REPORT 0x01 /* Statistics Report */ #define BMP_MSG_TYPE_PEER_DOWN 0x02 /* Peer Down Notification */ #define BMP_MSG_TYPE_PEER_UP 0x03 /* Peer Up Notification */ #define BMP_MSG_TYPE_INIT 0x04 /* Initiation Message */ #define BMP_MSG_TYPE_TERM 0x05 /* Termination Message */ /* BMP Initiation Message Types */ #define BMP_INIT_INFO_STRING 0x00 /* String */ #define BMP_INIT_SYSTEM_DESCRIPTION 0x01 /* sysDescr */ #define BMP_INIT_SYSTEM_NAME 0x02 /* sysName */ /* BMP Per Peer Types */ #define BMP_PEER_GLOBAL_INSTANCE 0x00 /* Global Instance Peer */ #define BMP_PEER_L3VPN_INSTANCE 0x01 /* L3VPN Instance Peer */ /* BMP Per Peer Header Flags */ #define BMP_PEER_FLAG_IPV6 0x80 /* V Flag: IPv6 */ #define BMP_PEER_FLAG_POST_POLICY 0x40 /* L Flag: Post-policy */ #define BMP_PEER_FLAG_RES 0x3F /* Reserved */ #define BMP_PEER_FLAG_MASK 0xFF /* BMP Stat Types */ #define BMP_STAT_PREFIX_REJ 0x00 /* Number of prefixes rejected by inbound policy */ #define BMP_STAT_PREFIX_DUP 0x01 /* Number of (known) duplicate prefix advertisements */ #define BMP_STAT_WITHDRAW_DUP 0x02 /* Number of (known) duplicate withdraws */ #define BMP_STAT_CLUSTER_LOOP 0x03 /* Number of updates invalidated due to CLUSTER_LIST loop */ #define BMP_STAT_AS_LOOP 0x04 /* Number of updates invalidated due to AS_PATH loop */ #define BMP_STAT_INV_ORIGINATOR 0x05 /* Number of updates invalidated due to ORIGINATOR_ID loop */ #define BMP_STAT_AS_CONFED_LOOP 0x06 /* Number of updates invalidated due to AS_CONFED loop */ #define BMP_STAT_ROUTES_ADJ_RIB_IN 0x07 /* Number of routes in Adj-RIBs-In */ #define BMP_STAT_ROUTES_LOC_RIB 0x08 /* Number of routes in Loc-RIB */ /* BMP Peer Down Reason Codes */ #define BMP_PEER_DOWN_LOCAL_NOTIFY 0x1 /* Local system closed the session with notification */ #define BMP_PEER_DOWN_LOCAL_NO_NOTIFY 0x2 /* Local system closed the session with FSM code */ #define BMP_PEER_DOWN_REMOTE_NOTIFY 0x3 /* Remote system closed the session with notification */ #define BMP_PEER_DOWN_REMOTE_NO_NOTIFY 0x4 /* Remote system closed the session without notification */ /* BMP Termination Message Types */ #define BMP_TERM_TYPE_STRING 0x00 /* String */ #define BMP_TERM_TYPE_REASON 0x01 /* Reason */ /* BMP Termination Reason Codes */ #define BMP_TERM_REASON_ADMIN_CLOSE 0x00 /* Session administratively closed */ #define BMP_TERM_REASON_UNSPECIFIED 0x01 /* Unspecified reason */ #define BMP_TERM_REASON_RESOURCES 0x02 /* Out of resources */ #define BMP_TERM_REASON_REDUNDANT 0x03 /* Redundant connection */ static const value_string bmp_typevals[] = { { BMP_MSG_TYPE_ROUTE_MONITORING, "Route Monitoring" }, { BMP_MSG_TYPE_STAT_REPORT, "Statistics Report" }, { BMP_MSG_TYPE_PEER_DOWN, "Peer Down Notification" }, { BMP_MSG_TYPE_PEER_UP, "Peer Up Notification" }, { BMP_MSG_TYPE_INIT, "Initiation Message" }, { BMP_MSG_TYPE_TERM, "Termination Message" }, { 0, NULL } }; static const value_string init_typevals[] = { { BMP_INIT_INFO_STRING, "String" }, { BMP_INIT_SYSTEM_DESCRIPTION, "sysDescr" }, { BMP_INIT_SYSTEM_NAME, "sysName" }, { 0, NULL } }; static const value_string peer_typevals[] = { { BMP_PEER_GLOBAL_INSTANCE, "Global Instance Peer" }, { BMP_PEER_L3VPN_INSTANCE, "L3VPN Instance Peer" }, { 0, NULL } }; static const value_string down_reason_typevals[] = { { BMP_PEER_DOWN_LOCAL_NOTIFY, "Local System, Notification" }, { BMP_PEER_DOWN_LOCAL_NO_NOTIFY, "Local System, No Notification" }, { BMP_PEER_DOWN_REMOTE_NOTIFY, "Remote System, Notification" }, { BMP_PEER_DOWN_REMOTE_NO_NOTIFY, "Remote System, No Notification" }, { 0, NULL } }; static const value_string term_typevals[] = { { BMP_TERM_TYPE_STRING, "String" }, { BMP_TERM_TYPE_REASON, "Reason" }, { 0, NULL } }; static const value_string term_reason_typevals[] = { { BMP_TERM_REASON_ADMIN_CLOSE, "Session administratively closed" }, { BMP_TERM_REASON_UNSPECIFIED, "Unspecified reason" }, { BMP_TERM_REASON_RESOURCES, "Out of resources" }, { BMP_TERM_REASON_REDUNDANT, "Redundant connection" }, { 0, NULL } }; static const value_string stat_typevals[] = { { BMP_STAT_PREFIX_REJ, "Rejected Prefixes" }, { BMP_STAT_PREFIX_DUP, "Duplicate Prefixes" }, { BMP_STAT_WITHDRAW_DUP, "Duplicate Withdraws" }, { BMP_STAT_CLUSTER_LOOP, "Invalid CLUSTER_LIST Loop" }, { BMP_STAT_AS_LOOP, "Invalid AS_PATH Loop" }, { BMP_STAT_INV_ORIGINATOR, "Invalid ORIGINATOR_ID" }, { BMP_STAT_AS_CONFED_LOOP, "Invalid AS_CONFED Loop" }, { BMP_STAT_ROUTES_ADJ_RIB_IN, "Routes in Adj-RIB-In" }, { BMP_STAT_ROUTES_LOC_RIB, "Routes in Loc-RIB" }, { 0, NULL } }; static int proto_bmp = -1; /* BMP Common Header filed */ static int hf_bmp_version = -1; static int hf_bmp_length = -1; static int hf_bmp_type = -1; /* BMP Unused Bytes filed */ static int hf_bmp_unused = -1; /* BMP Initiation Header filed */ static int hf_init_types = -1; static int hf_init_type = -1; static int hf_init_length = -1; static int hf_init_info = -1; /* BMP Per Peer Header filed */ static int hf_peer_header = -1; static int hf_peer_type = -1; static int hf_peer_flags = -1; static int hf_peer_flags_ipv6 = -1; static int hf_peer_flags_post_policy = -1; static int hf_peer_flags_res = -1; static int hf_peer_distinguisher = -1; static int hf_peer_ipv4_address = -1; static int hf_peer_ipv6_address = -1; static int hf_peer_asn = -1; static int hf_peer_bgp_id = -1; static int hf_peer_timestamp_sec = -1; static int hf_peer_timestamp_msec = -1; /* BMP Peer Up Notification filed */ static int hf_peer_up_ipv4_address = -1; static int hf_peer_up_ipv6_address = -1; static int hf_peer_up_local_port = -1; static int hf_peer_up_remote_port = -1; /* BMP Peer Down Notification filed */ static int hf_peer_down_reason = -1; static int hf_peer_down_data = -1; /* BMP Stat Reports filed */ static int hf_stats_count = -1; static int hf_stat_type = -1; static int hf_stat_len = -1; static int hf_stat_data_4 = -1; static int hf_stat_data_8 = -1; /* BMP Termination filed */ static int hf_term_types = -1; static int hf_term_type = -1; static int hf_term_len = -1; static int hf_term_info = -1; static int hf_term_reason = -1; static gint ett_bmp = -1; static gint ett_bmp_route_monitoring = -1; static gint ett_bmp_stat_report = -1; static gint ett_bmp_stat_type = -1; static gint ett_bmp_peer_down = -1; static gint ett_bmp_peer_up = -1; static gint ett_bmp_peer_header = -1; static gint ett_bmp_peer_flags = -1; static gint ett_bmp_init = -1; static gint ett_bmp_init_types = -1; static gint ett_bmp_init_type = -1; static gint ett_bmp_term = -1; static gint ett_bmp_term_type = -1; static gint ett_bmp_term_types = -1; static dissector_handle_t dissector_bgp; /* desegmentation */ static gboolean bmp_desegment = TRUE; /* * Dissect BMP Peer Down Notification * * 0 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+ * | Reason | 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Data (present if Reason = 1, 2 or 3) | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */ static void dissect_bmp_peer_down_notification(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset, gint8 flags _U_) { guint8 down_reason; down_reason = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_peer_down_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; if (down_reason != BMP_PEER_DOWN_REMOTE_NO_NOTIFY) { if (down_reason == BMP_PEER_DOWN_LOCAL_NO_NOTIFY) { proto_tree_add_item(tree, hf_peer_down_data, tvb, offset, 2, ENC_NA); } else { call_dissector(dissector_bgp, tvb_new_subset_remaining(tvb, offset), pinfo, tree); } } } /* * Dissect BMP Peer Up Notification * * 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Local Address (16 bytes) | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Local Port | Remote Port | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Sent OPEN Message | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Received OPEN Message | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */ static void dissect_bmp_peer_up_notification(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset, gint8 flags) { if (flags & BMP_PEER_FLAG_IPV6) { proto_tree_add_item(tree, hf_peer_up_ipv6_address, tvb, offset, 16, ENC_NA); offset += 16; } else { proto_tree_add_item(tree, hf_bmp_unused, tvb, offset, 12, ENC_NA); offset += 12; proto_tree_add_item(tree, hf_peer_up_ipv4_address, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; } proto_tree_add_item(tree, hf_peer_up_local_port, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_peer_up_remote_port, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; call_dissector(dissector_bgp, tvb_new_subset_remaining(tvb, offset), pinfo, tree); } /* * Dissect BMP Stats Report * * 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Stats Count | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * * * 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Stat Type | Stat Len | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Stat Data | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */ static void dissect_bmp_stat_report(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, int offset, gint8 flags _U_) { guint16 stat_len; guint32 i; guint32 stats_count = tvb_get_ntohl(tvb, offset); proto_tree_add_item(tree, hf_stats_count, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; for (i = 0; i < stats_count; i++) { proto_item *ti; proto_item *subtree; ti = proto_tree_add_item(tree, hf_stat_type, tvb, offset, 2, ENC_BIG_ENDIAN); subtree = proto_item_add_subtree(ti, ett_bmp_stat_type); offset += 2; stat_len = tvb_get_ntohs(tvb, offset); proto_tree_add_item(subtree, hf_stat_len, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; if (stat_len == 4) { proto_tree_add_item(subtree, hf_stat_data_4, tvb, offset, stat_len, ENC_BIG_ENDIAN); } else { proto_tree_add_item(subtree, hf_stat_data_8, tvb, offset, stat_len, ENC_BIG_ENDIAN); } offset += stat_len; } } /* * Dissect BMP Termination Message * * 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Information Type | Information Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Information (variable) | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */ static void dissect_bmp_termination(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, int offset, guint8 bmp_type _U_, guint16 len) { guint16 term_type; guint16 term_len; proto_item *ti; proto_item *subtree; ti = proto_tree_add_item(tree, hf_term_types, tvb, offset, len, ENC_NA); subtree = proto_item_add_subtree(ti, ett_bmp_term_types); term_type = tvb_get_ntohs(tvb, offset); proto_item_append_text(subtree, ", Type %s", val_to_str(term_type, term_typevals, "Unknown (0x%02x)")); proto_tree_add_item(subtree, hf_term_type, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; term_len = tvb_get_ntohs(tvb, offset); proto_tree_add_item(subtree, hf_term_len, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; if (term_type == BMP_TERM_TYPE_STRING) { proto_tree_add_item(subtree, hf_term_info, tvb, offset, term_len, ENC_ASCII|ENC_NA); } else { proto_tree_add_item(subtree, hf_term_reason, tvb, offset, term_len, ENC_BIG_ENDIAN); } /*offset += term_len;*/ } /* * Dissect BMP Per-Peer Header * * 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Peer Type | Peer Flags | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Peer Distinguisher (present based on peer type) | * | | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Peer Address (16 bytes) | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Peer AS | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Peer BGP ID | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Timestamp (seconds) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Timestamp (microseconds) | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */ static void dissect_bmp_peer_header(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, int offset, guint8 bmp_type, guint16 len) { guint8 flags; proto_item *item; proto_item *ti; proto_item *subtree; static const int * peer_flags[] = { &hf_peer_flags_ipv6, &hf_peer_flags_post_policy, &hf_peer_flags_res, NULL }; ti = proto_tree_add_item(tree, hf_peer_header, tvb, offset, len, ENC_NA); subtree = proto_item_add_subtree(ti, ett_bmp_peer_header); proto_tree_add_item(subtree, hf_peer_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; flags = tvb_get_guint8(tvb, offset); proto_tree_add_bitmask(subtree, tvb, offset, hf_peer_flags, ett_bmp_peer_flags, peer_flags, ENC_NA); offset += 1; item = proto_tree_add_item(subtree, hf_peer_distinguisher, tvb, offset, 8, ENC_NA); proto_item_set_text(item, "Peer Distinguisher: %s", decode_bgp_rd(tvb, offset)); offset += 8; if (flags & BMP_PEER_FLAG_IPV6) { proto_tree_add_item(subtree, hf_peer_ipv6_address, tvb, offset, 16, ENC_NA); offset += 16; } else { proto_tree_add_item(subtree, hf_bmp_unused, tvb, offset, 12, ENC_NA); offset += 12; proto_tree_add_item(subtree, hf_peer_ipv4_address, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; } proto_tree_add_item(subtree, hf_peer_asn, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(subtree, hf_peer_bgp_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(subtree, hf_peer_timestamp_sec, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(subtree, hf_peer_timestamp_msec, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; switch (bmp_type) { case BMP_MSG_TYPE_ROUTE_MONITORING: call_dissector(dissector_bgp, tvb_new_subset_remaining(tvb, offset), pinfo, tree); break; case BMP_MSG_TYPE_STAT_REPORT: dissect_bmp_stat_report(tvb, tree, pinfo, offset, flags); break; case BMP_MSG_TYPE_PEER_DOWN: dissect_bmp_peer_down_notification(tvb, tree, pinfo, offset, flags); break; case BMP_MSG_TYPE_PEER_UP: dissect_bmp_peer_up_notification(tvb, tree, pinfo, offset, flags); break; case BMP_MSG_TYPE_INIT: case BMP_MSG_TYPE_TERM: default: DISSECTOR_ASSERT_NOT_REACHED(); break; } } /* * Dissect BMP Initiation Message * * 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Information Type | Information Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Information (variable) | * ~ ~ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * */ static void dissect_bmp_init(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, int offset, guint8 bmp_type _U_, guint16 len) { guint16 init_type; guint16 init_len; proto_tree *pti; proto_tree *parent_tree; pti = proto_tree_add_item(tree, hf_init_types, tvb, offset, len, ENC_NA); parent_tree = proto_item_add_subtree(pti, ett_bmp_init_types); while (tvb_reported_length_remaining(tvb, offset) > 0) { proto_tree *ti; proto_tree *subtree; init_type = tvb_get_ntohs(tvb, offset); proto_item_append_text(pti, ", Type %s", val_to_str(init_type, init_typevals, "Unknown (0x%02x)")); ti = proto_tree_add_item(parent_tree, hf_init_type, tvb, offset, 2, ENC_BIG_ENDIAN); subtree = proto_item_add_subtree(ti, ett_bmp_init_type); offset += 2; init_len = tvb_get_ntohs(tvb, offset); proto_tree_add_item(subtree, hf_init_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(subtree, hf_init_info, tvb, offset, init_len, ENC_ASCII|ENC_NA); offset += init_len; } } /* * Dissect BMP PDU and Common Header * * 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 * +-+-+-+-+-+-+-+-+ * | Version | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Message Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Msg. Type | * +---------------+ * */ static guint get_bmp_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_) { return tvb_get_ntohl(tvb, offset + 1); } static int dissect_bmp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { int offset = 0; guint8 bmp_type; guint16 len; gint arg; proto_item *ti; proto_item *bmp_tree; col_set_str(pinfo->cinfo, COL_PROTOCOL, "BMP"); col_clear(pinfo->cinfo, COL_INFO); bmp_type = tvb_get_guint8(tvb, 5); col_add_fstr(pinfo->cinfo, COL_INFO, "Type: %s", val_to_str(bmp_type, bmp_typevals, "Unknown (0x%02x)")); ti = proto_tree_add_item(tree, proto_bmp, tvb, 0, -1, ENC_NA); proto_item_append_text(ti, ", Type %s", val_to_str(bmp_type, bmp_typevals, "Unknown (0x%02x)")); switch (bmp_type) { case BMP_MSG_TYPE_ROUTE_MONITORING: arg = ett_bmp_route_monitoring; break; case BMP_MSG_TYPE_STAT_REPORT: arg = ett_bmp_stat_report; break; case BMP_MSG_TYPE_PEER_DOWN: arg = ett_bmp_peer_down; break; case BMP_MSG_TYPE_PEER_UP: arg = ett_bmp_peer_up; break; case BMP_MSG_TYPE_INIT: arg = ett_bmp_init; break; case BMP_MSG_TYPE_TERM: arg = ett_bmp_term; break; default: arg = ett_bmp; break; } bmp_tree = proto_item_add_subtree(ti, arg); proto_tree_add_item(bmp_tree, hf_bmp_version, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(bmp_tree, hf_bmp_length, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(bmp_tree, hf_bmp_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; len = tvb_get_ntohs(tvb, offset); switch (bmp_type) { case BMP_MSG_TYPE_INIT: dissect_bmp_init(tvb, bmp_tree, pinfo, offset, bmp_type, len); break; case BMP_MSG_TYPE_ROUTE_MONITORING: case BMP_MSG_TYPE_STAT_REPORT: case BMP_MSG_TYPE_PEER_DOWN: case BMP_MSG_TYPE_PEER_UP: dissect_bmp_peer_header(tvb, bmp_tree, pinfo, offset, bmp_type, len); break; case BMP_MSG_TYPE_TERM: dissect_bmp_termination(tvb, bmp_tree, pinfo, offset, bmp_type, len); break; default: break; } return tvb_captured_length(tvb); } /* Main dissecting routine */ static int dissect_bmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { tcp_dissect_pdus(tvb, pinfo, tree, bmp_desegment, FRAME_HEADER_LEN, get_bmp_pdu_len, dissect_bmp_pdu, data); return tvb_captured_length(tvb); } void proto_register_bmp(void) { static hf_register_info hf[] = { /* BMP Common Header */ { &hf_bmp_version, { "Version", "bmp.version", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_bmp_length, { "Length", "bmp.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_bmp_type, { "Type", "bmp.type", FT_UINT8, BASE_DEC, VALS(bmp_typevals), 0x0, "BMP message type", HFILL }}, /* Unused/Reserved Bytes */ { &hf_bmp_unused, { "Unused", "bmp.unused", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, /* Initiation Header */ { &hf_init_types, { "Information Types", "bmp.init.types", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_init_type, { "Type", "bmp.init.type", FT_UINT16, BASE_DEC, VALS(init_typevals), 0x0, "Initiation type", HFILL }}, { &hf_init_length, { "Length", "bmp.init.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_init_info, { "Information", "bmp.init.info", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }}, /* Per Peer Header */ { &hf_peer_header, { "Per Peer Header", "bmp.peer.header", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_peer_type, { "Type", "bmp.peer.type", FT_UINT8, BASE_DEC, VALS(peer_typevals), 0x0, NULL, HFILL }}, { &hf_peer_flags, { "Flags", "bmp.peer.flags", FT_UINT8, BASE_HEX, NULL, BMP_PEER_FLAG_MASK, NULL, HFILL }}, { &hf_peer_flags_ipv6, { "IPv6", "bmp.peer.flags.ipv6", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BMP_PEER_FLAG_IPV6, NULL, HFILL }}, { &hf_peer_flags_post_policy, { "Post-policy", "bmp.peer.flags.post_policy", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BMP_PEER_FLAG_POST_POLICY, NULL, HFILL }}, { &hf_peer_flags_res, { "Reserved", "bmp.peer.flags.reserved", FT_BOOLEAN, 8, TFS(&tfs_set_notset), BMP_PEER_FLAG_RES, NULL, HFILL }}, { &hf_peer_distinguisher, { "Peer Distinguisher", "bmp.peer.distinguisher", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_peer_ipv4_address, { "Address", "bmp.peer.ip.addr", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_peer_ipv6_address, { "Address", "bmp.peer.ipv6.addr", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_peer_asn, { "ASN", "bmp.peer.asn", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_peer_bgp_id, { "BGP ID", "bmp.peer.id", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_peer_timestamp_sec, { "Timestamp (sec)", "bmp.peer.timestamp.sec", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_peer_timestamp_msec, { "Timestamp (msec)", "bmp.peer.timestamp.msec", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_peer_up_ipv4_address, { "Local Address", "bmp.peer.up.ip.addr", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_peer_up_ipv6_address, { "Local Address", "bmp.peer.up.ipv6.addr", FT_IPv6, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_peer_up_local_port, { "Local Port", "bmp.peer.up.port.local", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_peer_up_remote_port, { "Remote Port", "bmp.peer.up.port.remote", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, /* Peer Down Notification */ { &hf_peer_down_reason, { "Reason", "bmp.peer.down.reason", FT_UINT8, BASE_DEC, VALS(down_reason_typevals), 0x0, NULL, HFILL }}, { &hf_peer_down_data, { "Data", "bmp.peer.down.data", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, /* Stats Report */ { &hf_stats_count, { "Stats Count", "bmp.stats.count", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_stat_type, { "Type", "bmp.stats.type", FT_UINT16, BASE_DEC, VALS(stat_typevals), 0x0, NULL, HFILL }}, { &hf_stat_len, { "Length", "bmp.stats.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_stat_data_4, { "Data", "bmp.stats.data.4byte", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_stat_data_8, { "Data", "bmp.stats.data.8byte", FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL }}, /* Termination Message */ { &hf_term_types, { "Termination Types", "bmp.term.types", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_term_type, { "Type", "bmp.term.type", FT_UINT16, BASE_DEC, VALS(term_typevals), 0x0, NULL, HFILL }}, { &hf_term_len, { "Length", "bmp.term.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_term_info, { "Information", "bmp.term.info", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_term_reason, { "Reason", "bmp.term.reason", FT_UINT16, BASE_DEC, VALS(term_reason_typevals), 0x0, NULL, HFILL }} }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_bmp, &ett_bmp_route_monitoring, &ett_bmp_stat_report, &ett_bmp_stat_type, &ett_bmp_peer_down, &ett_bmp_peer_up, &ett_bmp_peer_header, &ett_bmp_peer_flags, &ett_bmp_init, &ett_bmp_init_type, &ett_bmp_init_types, &ett_bmp_term, &ett_bmp_term_type, &ett_bmp_term_types, }; module_t *bmp_module; proto_bmp = proto_register_protocol( "BGP Monitoring Protocol", /* name */ "BMP", /* short name */ "bmp" /* abbrev */ ); proto_register_field_array(proto_bmp, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); bmp_module = prefs_register_protocol(proto_bmp, NULL); prefs_register_bool_preference(bmp_module, "desegment", "Reassemble BMP messages spanning multiple TCP segments", "Whether the BMP dissector should reassemble messages spanning multiple TCP segments." " To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.", &bmp_desegment); } void proto_reg_handoff_bmp(void) { static dissector_handle_t bmp_handle; bmp_handle = create_dissector_handle(dissect_bmp, proto_bmp); dissector_add_for_decode_as_with_preference("tcp.port", bmp_handle); dissector_bgp = find_dissector_add_dependency("bgp", proto_bmp); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * ex: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */