/* packet-atm.c * Routines for ATM packet disassembly * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include "packet-atm.h" #include "packet-snmp.h" #include "packet-eth.h" #include "packet-tr.h" #include "packet-llc.h" #include #include "packet-pw-atm.h" void proto_register_atm(void); void proto_reg_handoff_atm(void); static int proto_atm = -1; static int hf_atm_aal = -1; static int hf_atm_gfc = -1; static int hf_atm_vpi = -1; static int hf_atm_vci = -1; static int hf_atm_cid = -1; static int hf_atm_reserved = -1; static int proto_atm_lane = -1; static int proto_ilmi = -1; static int proto_aal1 = -1; static int proto_aal3_4 = -1; static int proto_oamaal = -1; static int hf_atm_le_client_client = -1; static int hf_atm_lan_destination_tag = -1; static int hf_atm_lan_destination_mac = -1; static int hf_atm_le_control_tlv_type = -1; static int hf_atm_le_control_tlv_length = -1; static int hf_atm_lan_destination_route_desc = -1; static int hf_atm_lan_destination_lan_id = -1; static int hf_atm_lan_destination_bridge_num = -1; static int hf_atm_source_atm = -1; static int hf_atm_target_atm = -1; static int hf_atm_le_configure_join_frame_lan_type = -1; static int hf_atm_le_configure_join_frame_max_frame_size = -1; static int hf_atm_le_configure_join_frame_num_tlvs = -1; static int hf_atm_le_configure_join_frame_elan_name_size = -1; static int hf_atm_le_configure_join_frame_elan_name = -1; static int hf_atm_le_registration_frame_num_tlvs = -1; static int hf_atm_le_arp_frame_num_tlvs = -1; static int hf_atm_le_verify_frame_num_tlvs = -1; static int hf_atm_le_control_marker = -1; static int hf_atm_le_control_protocol = -1; static int hf_atm_le_control_version = -1; static int hf_atm_le_control_opcode = -1; static int hf_atm_le_control_status = -1; static int hf_atm_le_control_transaction_id = -1; static int hf_atm_le_control_requester_lecid = -1; static int hf_atm_le_control_flags = -1; static int hf_atm_le_control_flag_v2_capable = -1; static int hf_atm_le_control_flag_selective_multicast = -1; static int hf_atm_le_control_flag_v2_required = -1; static int hf_atm_le_control_flag_proxy = -1; static int hf_atm_le_control_flag_exclude_explorer_frames = -1; static int hf_atm_le_control_flag_address = -1; static int hf_atm_le_control_topology_change = -1; static int hf_atm_traffic_type = -1; static int hf_atm_traffic_vcmx = -1; static int hf_atm_traffic_lane = -1; static int hf_atm_traffic_ipsilon = -1; static int hf_atm_cells = -1; static int hf_atm_aal5_uu = -1; static int hf_atm_aal5_cpi = -1; static int hf_atm_aal5_len = -1; static int hf_atm_aal5_crc = -1; static int hf_atm_payload_type = -1; static int hf_atm_cell_loss_priority = -1; static int hf_atm_header_error_check = -1; static int hf_atm_channel = -1; static int hf_atm_aa1_csi = -1; static int hf_atm_aa1_seq_count = -1; static int hf_atm_aa1_crc = -1; static int hf_atm_aa1_parity = -1; static int hf_atm_aa1_payload = -1; static int hf_atm_aal3_4_seg_type = -1; static int hf_atm_aal3_4_seq_num = -1; static int hf_atm_aal3_4_multiplex_id = -1; static int hf_atm_aal3_4_information = -1; static int hf_atm_aal3_4_length_indicator = -1; static int hf_atm_aal3_4_crc = -1; static int hf_atm_aal_oamcell_type = -1; static int hf_atm_aal_oamcell_type_fm = -1; static int hf_atm_aal_oamcell_type_pm = -1; static int hf_atm_aal_oamcell_type_ad = -1; static int hf_atm_aal_oamcell_type_ft = -1; static int hf_atm_aal_oamcell_func_spec = -1; static int hf_atm_aal_oamcell_crc = -1; static int hf_atm_padding = -1; static gint ett_atm = -1; static gint ett_atm_lane = -1; static gint ett_atm_lane_lc_lan_dest = -1; static gint ett_atm_lane_lc_lan_dest_rd = -1; static gint ett_atm_lane_lc_flags = -1; static gint ett_atm_lane_lc_tlv = -1; static gint ett_ilmi = -1; static gint ett_aal1 = -1; static gint ett_aal3_4 = -1; static gint ett_oamaal = -1; static expert_field ei_atm_reassembly_failed = EI_INIT; static dissector_handle_t atm_handle; static dissector_handle_t atm_untruncated_handle; static dissector_handle_t eth_withoutfcs_handle; static dissector_handle_t tr_handle; static dissector_handle_t fr_handle; static dissector_handle_t llc_handle; static dissector_handle_t sscop_handle; static dissector_handle_t ppp_handle; static dissector_handle_t eth_maybefcs_handle; static dissector_handle_t ip_handle; static gboolean dissect_lanesscop = FALSE; static dissector_table_t atm_type_aal2_table; static dissector_table_t atm_type_aal5_table; static dissector_table_t atm_cell_payload_vpi_vci_table; static dissector_table_t atm_reassembled_vpi_vci_table; /* * See * * https://www.broadband-forum.org/index.php?option=com_sppagebuilder&view=page&id=185 * * for a number of ATM Forum specifications, e.g. the LAN Emulation * over ATM 1.0 spec, whence I got most of this. */ /* LE Control opcodes */ #define LE_CONFIGURE_REQUEST 0x0001 #define LE_CONFIGURE_RESPONSE 0x0101 #define LE_JOIN_REQUEST 0x0002 #define LE_JOIN_RESPONSE 0x0102 #define READY_QUERY 0x0003 #define READY_IND 0x0103 #define LE_REGISTER_REQUEST 0x0004 #define LE_REGISTER_RESPONSE 0x0104 #define LE_UNREGISTER_REQUEST 0x0005 #define LE_UNREGISTER_RESPONSE 0x0105 #define LE_ARP_REQUEST 0x0006 #define LE_ARP_RESPONSE 0x0106 #define LE_FLUSH_REQUEST 0x0007 #define LE_FLUSH_RESPONSE 0x0107 #define LE_NARP_REQUEST 0x0008 #define LE_TOPOLOGY_REQUEST 0x0009 #define LE_VERIFY_REQUEST 0x000A #define LE_VERIFY_RESPONSE 0x010A static const value_string le_control_opcode_vals[] = { { LE_CONFIGURE_REQUEST, "LE_CONFIGURE_REQUEST" }, { LE_CONFIGURE_RESPONSE, "LE_CONFIGURE_RESPONSE" }, { LE_JOIN_REQUEST, "LE_JOIN_REQUEST" }, { LE_JOIN_RESPONSE, "LE_JOIN_RESPONSE" }, { READY_QUERY, "READY_QUERY" }, { READY_IND, "READY_IND" }, { LE_REGISTER_REQUEST, "LE_REGISTER_REQUEST" }, { LE_REGISTER_RESPONSE, "LE_REGISTER_RESPONSE" }, { LE_UNREGISTER_REQUEST, "LE_UNREGISTER_REQUEST" }, { LE_UNREGISTER_RESPONSE, "LE_UNREGISTER_RESPONSE" }, { LE_ARP_REQUEST, "LE_ARP_REQUEST" }, { LE_ARP_RESPONSE, "LE_ARP_RESPONSE" }, { LE_FLUSH_REQUEST, "LE_FLUSH_REQUEST" }, { LE_FLUSH_RESPONSE, "LE_FLUSH_RESPONSE" }, { LE_NARP_REQUEST, "LE_NARP_REQUEST" }, { LE_TOPOLOGY_REQUEST, "LE_TOPOLOGY_REQUEST" }, { LE_VERIFY_REQUEST, "LE_VERIFY_REQUEST" }, { LE_VERIFY_RESPONSE, "LE_VERIFY_RESPONSE" }, { 0, NULL } }; /* LE Control statuses */ static const value_string le_control_status_vals[] = { { 0, "Success" }, { 1, "Version not supported" }, { 2, "Invalid request parameters" }, { 4, "Duplicate LAN destination registration" }, { 5, "Duplicate ATM address" }, { 6, "Insufficient resources to grant request" }, { 7, "Access denied" }, { 8, "Invalid REQUESTOR-ID" }, { 9, "Invalid LAN destination" }, { 10, "Invalid ATM address" }, { 20, "No configuration" }, { 21, "LE_CONFIGURE error" }, { 22, "Insufficient information" }, { 24, "TLV not found" }, { 0, NULL } }; /* LE Control LAN destination tags */ #define TAG_NOT_PRESENT 0x0000 #define TAG_MAC_ADDRESS 0x0001 #define TAG_ROUTE_DESCRIPTOR 0x0002 static const value_string le_control_landest_tag_vals[] = { { TAG_NOT_PRESENT, "Not present" }, { TAG_MAC_ADDRESS, "MAC address" }, { TAG_ROUTE_DESCRIPTOR, "Route descriptor" }, { 0, NULL } }; /* LE Control LAN types */ #define LANT_UNSPEC 0x00 #define LANT_802_3 0x01 #define LANT_802_5 0x02 static const value_string le_control_lan_type_vals[] = { { LANT_UNSPEC, "Unspecified" }, { LANT_802_3, "Ethernet/802.3" }, { LANT_802_5, "802.5" }, { 0, NULL } }; static const value_string le_control_frame_size_vals[] = { { 0x00, "Unspecified" }, { 0x01, "1516/1528/1580/1592" }, { 0x02, "4544/4556/1580/1592" }, { 0x03, "9234/9246" }, { 0x04, "18190/18202" }, { 0, NULL } }; static const value_string atm_channel_vals[] = { { 0, "DTE->DCE" }, { 1, "DCE->DTE" }, { 0, NULL } }; static const true_false_string tfs_remote_local = { "Remote", "Local" }; static const true_false_string tfs_low_high_priority = { "Low priority", "High priority" }; static void dissect_le_client(tvbuff_t *tvb, proto_tree *tree) { proto_item *ti; proto_tree *lane_tree; if (tree) { ti = proto_tree_add_protocol_format(tree, proto_atm_lane, tvb, 0, 2, "ATM LANE"); lane_tree = proto_item_add_subtree(ti, ett_atm_lane); proto_tree_add_item(lane_tree, hf_atm_le_client_client, tvb, 0, 2, ENC_BIG_ENDIAN ); } } static void dissect_lan_destination(tvbuff_t *tvb, int offset, const char *type, proto_tree *tree) { proto_item *td; proto_tree *dest_tree; guint16 tag; proto_tree *rd_tree; dest_tree = proto_tree_add_subtree_format(tree, tvb, offset, 8, ett_atm_lane_lc_lan_dest, NULL, "%s LAN destination", type); tag = tvb_get_ntohs(tvb, offset); proto_tree_add_item(dest_tree, hf_atm_lan_destination_tag, tvb, offset, 2, ENC_BIG_ENDIAN ); offset += 2; switch (tag) { case TAG_MAC_ADDRESS: proto_tree_add_item(dest_tree, hf_atm_lan_destination_mac, tvb, offset, 6, ENC_NA); break; case TAG_ROUTE_DESCRIPTOR: offset += 4; td = proto_tree_add_item(dest_tree, hf_atm_lan_destination_route_desc, tvb, offset, 2, ENC_LITTLE_ENDIAN); rd_tree = proto_item_add_subtree(td, ett_atm_lane_lc_lan_dest_rd); proto_tree_add_item(rd_tree, hf_atm_lan_destination_lan_id, tvb, offset, 2, ENC_LITTLE_ENDIAN); proto_tree_add_item(rd_tree, hf_atm_lan_destination_bridge_num, tvb, offset, 2, ENC_LITTLE_ENDIAN); break; } } /* * TLV values in LE Control frames. */ #define TLV_TYPE(oui, ident) (((oui) << 8) | (ident)) #define LE_CONTROL_TIMEOUT TLV_TYPE(OUI_ATM_FORUM, 0x01) #define LE_MAX_UNK_FRAME_COUNT TLV_TYPE(OUI_ATM_FORUM, 0x02) #define LE_MAX_UNK_FRAME_TIME TLV_TYPE(OUI_ATM_FORUM, 0x03) #define LE_VCC_TIMEOUT_PERIOD TLV_TYPE(OUI_ATM_FORUM, 0x04) #define LE_MAX_RETRY_COUNT TLV_TYPE(OUI_ATM_FORUM, 0x05) #define LE_AGING_TIME TLV_TYPE(OUI_ATM_FORUM, 0x06) #define LE_FORWARD_DELAY_TIME TLV_TYPE(OUI_ATM_FORUM, 0x07) #define LE_EXPECTED_ARP_RESPONSE_TIME TLV_TYPE(OUI_ATM_FORUM, 0x08) #define LE_FLUSH_TIMEOUT TLV_TYPE(OUI_ATM_FORUM, 0x09) #define LE_PATH_SWITCHING_DELAY TLV_TYPE(OUI_ATM_FORUM, 0x0A) #define LE_LOCAL_SEGMENT_ID TLV_TYPE(OUI_ATM_FORUM, 0x0B) #define LE_MCAST_SEND_VCC_TYPE TLV_TYPE(OUI_ATM_FORUM, 0x0C) #define LE_MCAST_SEND_VCC_AVGRATE TLV_TYPE(OUI_ATM_FORUM, 0x0D) #define LE_MCAST_SEND_VCC_PEAKRATE TLV_TYPE(OUI_ATM_FORUM, 0x0E) #define LE_CONN_COMPLETION_TIMER TLV_TYPE(OUI_ATM_FORUM, 0x0F) #define LE_CONFIG_FRAG_INFO TLV_TYPE(OUI_ATM_FORUM, 0x10) #define LE_LAYER_3_ADDRESS TLV_TYPE(OUI_ATM_FORUM, 0x11) #define LE_ELAN_ID TLV_TYPE(OUI_ATM_FORUM, 0x12) #define LE_SERVICE_CATEGORY TLV_TYPE(OUI_ATM_FORUM, 0x13) #define LE_LLC_MUXED_ATM_ADDRESS TLV_TYPE(OUI_ATM_FORUM, 0x2B) #define LE_X5_ADJUSTMENT TLV_TYPE(OUI_ATM_FORUM, 0x2C) #define LE_PREFERRED_LES TLV_TYPE(OUI_ATM_FORUM, 0x2D) static const value_string le_tlv_type_vals[] = { { LE_CONTROL_TIMEOUT, "Control Time-out" }, { LE_MAX_UNK_FRAME_COUNT, "Maximum Unknown Frame Count" }, { LE_MAX_UNK_FRAME_TIME, "Maximum Unknown Frame Time" }, { LE_VCC_TIMEOUT_PERIOD, "VCC Time-out" }, { LE_MAX_RETRY_COUNT, "Maximum Retry Count" }, { LE_AGING_TIME, "Aging Time" }, { LE_FORWARD_DELAY_TIME, "Forwarding Delay Time" }, { LE_EXPECTED_ARP_RESPONSE_TIME, "Expected LE_ARP Response Time" }, { LE_FLUSH_TIMEOUT, "Flush Time-out" }, { LE_PATH_SWITCHING_DELAY, "Path Switching Delay" }, { LE_LOCAL_SEGMENT_ID, "Local Segment ID" }, { LE_MCAST_SEND_VCC_TYPE, "Mcast Send VCC Type" }, { LE_MCAST_SEND_VCC_AVGRATE, "Mcast Send VCC AvgRate" }, { LE_MCAST_SEND_VCC_PEAKRATE, "Mcast Send VCC PeakRate" }, { LE_CONN_COMPLETION_TIMER, "Connection Completion Timer" }, { LE_CONFIG_FRAG_INFO, "Config Frag Info" }, { LE_LAYER_3_ADDRESS, "Layer 3 Address" }, { LE_ELAN_ID, "ELAN ID" }, { LE_SERVICE_CATEGORY, "Service Category" }, { LE_LLC_MUXED_ATM_ADDRESS, "LLC-muxed ATM Address" }, { LE_X5_ADJUSTMENT, "X5 Adjustment" }, { LE_PREFERRED_LES, "Preferred LES" }, { 0, NULL }, }; static void dissect_le_control_tlvs(tvbuff_t *tvb, int offset, guint num_tlvs, proto_tree *tree) { guint32 tlv_type; guint8 tlv_length; proto_tree *tlv_tree; while (num_tlvs != 0) { tlv_type = tvb_get_ntohl(tvb, offset); tlv_length = tvb_get_guint8(tvb, offset+4); tlv_tree = proto_tree_add_subtree_format(tree, tvb, offset, 5+tlv_length, ett_atm_lane_lc_tlv, NULL, "TLV type: %s", val_to_str(tlv_type, le_tlv_type_vals, "Unknown (0x%08x)")); proto_tree_add_item(tlv_tree, hf_atm_le_control_tlv_type, tvb, offset, 4, ENC_BIG_ENDIAN); proto_tree_add_item(tlv_tree, hf_atm_le_control_tlv_length, tvb, offset+4, 1, ENC_BIG_ENDIAN); offset += 5+tlv_length; num_tlvs--; } } static void dissect_le_configure_join_frame(tvbuff_t *tvb, int offset, proto_tree *tree) { guint8 num_tlvs; guint8 name_size; dissect_lan_destination(tvb, offset, "Source", tree); offset += 8; dissect_lan_destination(tvb, offset, "Target", tree); offset += 8; proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA); offset += 20; proto_tree_add_item(tree, hf_atm_le_configure_join_frame_lan_type, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_atm_le_configure_join_frame_max_frame_size, tvb, offset, 1, ENC_NA); offset += 1; num_tlvs = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_atm_le_configure_join_frame_num_tlvs, tvb, offset, 1, ENC_NA); offset += 1; name_size = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_atm_le_configure_join_frame_elan_name_size, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA); offset += 20; if (name_size > 32) name_size = 32; if (name_size != 0) { proto_tree_add_item(tree, hf_atm_le_configure_join_frame_elan_name, tvb, offset, name_size, ENC_NA); } offset += 32; dissect_le_control_tlvs(tvb, offset, num_tlvs, tree); } static void dissect_le_registration_frame(tvbuff_t *tvb, int offset, proto_tree *tree) { guint8 num_tlvs; dissect_lan_destination(tvb, offset, "Source", tree); offset += 8; dissect_lan_destination(tvb, offset, "Target", tree); offset += 8; proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA); offset += 20; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 2, ENC_NA); offset += 2; num_tlvs = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_atm_le_registration_frame_num_tlvs, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 53, ENC_NA); offset += 53; dissect_le_control_tlvs(tvb, offset, num_tlvs, tree); } static void dissect_le_arp_frame(tvbuff_t *tvb, int offset, proto_tree *tree) { guint8 num_tlvs; dissect_lan_destination(tvb, offset, "Source", tree); offset += 8; dissect_lan_destination(tvb, offset, "Target", tree); offset += 8; proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA); offset += 20; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 2, ENC_NA); offset += 2; num_tlvs = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_atm_le_arp_frame_num_tlvs, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA); offset += 20; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 32, ENC_NA); offset += 32; dissect_le_control_tlvs(tvb, offset, num_tlvs, tree); } static void dissect_le_verify_frame(tvbuff_t *tvb, int offset, proto_tree *tree) { guint8 num_tlvs; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 38, ENC_NA); offset += 38; num_tlvs = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_atm_le_verify_frame_num_tlvs, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA); offset += 20; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 32, ENC_NA); offset += 32; dissect_le_control_tlvs(tvb, offset, num_tlvs, tree); } static int dissect_le_flush_frame(tvbuff_t *tvb, int offset, proto_tree *tree) { dissect_lan_destination(tvb, offset, "Source", tree); offset += 8; dissect_lan_destination(tvb, offset, "Target", tree); offset += 8; proto_tree_add_item(tree, hf_atm_source_atm, tvb, offset, 20, ENC_NA); offset += 20; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 4, ENC_NA); offset += 4; proto_tree_add_item(tree, hf_atm_target_atm, tvb, offset, 20, ENC_NA); offset += 20; proto_tree_add_item(tree, hf_atm_reserved, tvb, offset, 32, ENC_NA); offset += 32; return offset; } static void dissect_le_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *ti; proto_tree *lane_tree = NULL; int offset = 0; proto_item *tf; proto_tree *flags_tree; guint16 opcode; col_set_str(pinfo->cinfo, COL_INFO, "LE Control"); if (tree) { ti = proto_tree_add_protocol_format(tree, proto_atm_lane, tvb, offset, 108, "ATM LANE"); lane_tree = proto_item_add_subtree(ti, ett_atm_lane); proto_tree_add_item(lane_tree, hf_atm_le_control_marker, tvb, offset, 2, ENC_BIG_ENDIAN ); } offset += 2; if (tree) { proto_tree_add_item(lane_tree, hf_atm_le_control_protocol, tvb, offset, 1, ENC_BIG_ENDIAN ); } offset += 1; if (tree) { proto_tree_add_item(lane_tree, hf_atm_le_control_version, tvb, offset, 1, ENC_BIG_ENDIAN ); } offset += 1; opcode = tvb_get_ntohs(tvb, offset); col_append_fstr(pinfo->cinfo, COL_INFO, ": %s", val_to_str(opcode, le_control_opcode_vals, "Unknown opcode (0x%04X)")); if (tree) { proto_tree_add_item(lane_tree, hf_atm_le_control_opcode, tvb, offset, 2, ENC_BIG_ENDIAN ); } offset += 2; if (opcode == READY_QUERY || opcode == READY_IND) { /* There's nothing more in this packet. */ return; } if (tree) { if (opcode & 0x0100) { /* Response; decode status. */ proto_tree_add_item(lane_tree, hf_atm_le_control_status, tvb, offset, 2, ENC_BIG_ENDIAN ); } offset += 2; proto_tree_add_item(lane_tree, hf_atm_le_control_transaction_id, tvb, offset, 4, ENC_BIG_ENDIAN ); offset += 4; proto_tree_add_item(lane_tree, hf_atm_le_control_requester_lecid, tvb, offset, 2, ENC_BIG_ENDIAN ); offset += 2; tf = proto_tree_add_item(lane_tree, hf_atm_le_control_flags, tvb, offset, 2, ENC_BIG_ENDIAN ); flags_tree = proto_item_add_subtree(tf, ett_atm_lane_lc_flags); switch (opcode) { case LE_CONFIGURE_REQUEST: case LE_CONFIGURE_RESPONSE: proto_tree_add_item(flags_tree, hf_atm_le_control_flag_v2_capable, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; dissect_le_configure_join_frame(tvb, offset, lane_tree); break; case LE_JOIN_REQUEST: case LE_JOIN_RESPONSE: proto_tree_add_item(flags_tree, hf_atm_le_control_flag_v2_capable, tvb, offset, 2, ENC_BIG_ENDIAN); if (opcode == LE_JOIN_REQUEST) { proto_tree_add_item(flags_tree, hf_atm_le_control_flag_selective_multicast, tvb, offset, 2, ENC_BIG_ENDIAN); } else { proto_tree_add_item(flags_tree, hf_atm_le_control_flag_v2_required, tvb, offset, 2, ENC_BIG_ENDIAN); } proto_tree_add_item(flags_tree, hf_atm_le_control_flag_proxy, tvb, offset, 2, ENC_BIG_ENDIAN); proto_tree_add_item(flags_tree, hf_atm_le_control_flag_exclude_explorer_frames, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; dissect_le_configure_join_frame(tvb, offset, lane_tree); break; case LE_REGISTER_REQUEST: case LE_REGISTER_RESPONSE: case LE_UNREGISTER_REQUEST: case LE_UNREGISTER_RESPONSE: offset += 2; dissect_le_registration_frame(tvb, offset, lane_tree); break; case LE_ARP_REQUEST: case LE_ARP_RESPONSE: case LE_NARP_REQUEST: if (opcode != LE_NARP_REQUEST) { proto_tree_add_item(flags_tree, hf_atm_le_control_flag_address, tvb, offset, 2, ENC_BIG_ENDIAN); } offset += 2; dissect_le_arp_frame(tvb, offset, lane_tree); break; case LE_TOPOLOGY_REQUEST: proto_tree_add_item(flags_tree, hf_atm_le_control_topology_change, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(flags_tree, hf_atm_reserved, tvb, offset, 92, ENC_NA); break; case LE_VERIFY_REQUEST: case LE_VERIFY_RESPONSE: offset += 2; dissect_le_verify_frame(tvb, offset, lane_tree); break; case LE_FLUSH_REQUEST: case LE_FLUSH_RESPONSE: offset += 2; dissect_le_flush_frame(tvb, offset, lane_tree); break; } } } static gboolean capture_lane(const guchar *pd, int offset _U_, int len, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header) { /* Is it LE Control, 802.3, 802.5, or "none of the above"? */ return try_capture_dissector("atm_lane", pseudo_header->atm.subtype, pd, 2, len, cpinfo, pseudo_header); } static int dissect_lane(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { struct atm_phdr *atm_info = (struct atm_phdr *)data; tvbuff_t *next_tvb; tvbuff_t *next_tvb_le_client; col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM LANE"); /* Is it LE Control, 802.3, 802.5, or "none of the above"? */ switch (atm_info->subtype) { case TRAF_ST_LANE_LE_CTRL: dissect_le_control(tvb, pinfo, tree); break; case TRAF_ST_LANE_802_3: case TRAF_ST_LANE_802_3_MC: col_set_str(pinfo->cinfo, COL_INFO, "LE Client - Ethernet/802.3"); dissect_le_client(tvb, tree); /* Dissect as Ethernet */ next_tvb_le_client = tvb_new_subset_remaining(tvb, 2); call_dissector(eth_withoutfcs_handle, next_tvb_le_client, pinfo, tree); break; case TRAF_ST_LANE_802_5: case TRAF_ST_LANE_802_5_MC: col_set_str(pinfo->cinfo, COL_INFO, "LE Client - 802.5"); dissect_le_client(tvb, tree); /* Dissect as Token-Ring */ next_tvb_le_client = tvb_new_subset_remaining(tvb, 2); call_dissector(tr_handle, next_tvb_le_client, pinfo, tree); break; default: /* Dump it as raw data. */ col_set_str(pinfo->cinfo, COL_INFO, "Unknown LANE traffic type"); next_tvb = tvb_new_subset_remaining(tvb, 0); call_data_dissector(next_tvb, pinfo, tree); break; } return tvb_captured_length(tvb); } static int dissect_ilmi(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { return dissect_snmp_pdu(tvb, 0, pinfo, tree, proto_ilmi, ett_ilmi, FALSE); } /* AAL types */ static const value_string aal_vals[] = { { AAL_UNKNOWN, "Unknown AAL" }, { AAL_1, "AAL1" }, { AAL_2, "AAL2" }, { AAL_3_4, "AAL3/4" }, { AAL_5, "AAL5" }, { AAL_USER, "User AAL" }, { AAL_SIGNALLING, "Signalling AAL" }, { AAL_OAMCELL, "OAM cell" }, { 0, NULL } }; /* AAL5 higher-level traffic types */ static const value_string aal5_hltype_vals[] = { { TRAF_UNKNOWN, "Unknown traffic type" }, { TRAF_LLCMX, "LLC multiplexed" }, { TRAF_VCMX, "VC multiplexed" }, { TRAF_LANE, "LANE" }, { TRAF_ILMI, "ILMI" }, { TRAF_FR, "Frame Relay" }, { TRAF_SPANS, "FORE SPANS" }, { TRAF_IPSILON, "Ipsilon" }, { TRAF_GPRS_NS, "GPRS NS" }, { TRAF_SSCOP, "SSCOP" }, { 0, NULL } }; /* Traffic subtypes for VC multiplexed traffic */ static const value_string vcmx_type_vals[] = { { TRAF_ST_UNKNOWN, "Unknown VC multiplexed traffic type" }, { TRAF_ST_VCMX_802_3_FCS, "802.3 FCS" }, { TRAF_ST_VCMX_802_4_FCS, "802.4 FCS" }, { TRAF_ST_VCMX_802_5_FCS, "802.5 FCS" }, { TRAF_ST_VCMX_FDDI_FCS, "FDDI FCS" }, { TRAF_ST_VCMX_802_6_FCS, "802.6 FCS" }, { TRAF_ST_VCMX_802_3, "802.3" }, { TRAF_ST_VCMX_802_4, "802.4" }, { TRAF_ST_VCMX_802_5, "802.5" }, { TRAF_ST_VCMX_FDDI, "FDDI" }, { TRAF_ST_VCMX_802_6, "802.6" }, { TRAF_ST_VCMX_FRAGMENTS, "Fragments" }, { TRAF_ST_VCMX_BPDU, "BPDU" }, { 0, NULL } }; /* Traffic subtypes for LANE traffic */ static const value_string lane_type_vals[] = { { TRAF_ST_UNKNOWN, "Unknown LANE traffic type" }, { TRAF_ST_LANE_LE_CTRL, "LE Control" }, { TRAF_ST_LANE_802_3, "802.3" }, { TRAF_ST_LANE_802_5, "802.5" }, { TRAF_ST_LANE_802_3_MC, "802.3 multicast" }, { TRAF_ST_LANE_802_5_MC, "802.5 multicast" }, { 0, NULL } }; /* Traffic subtypes for Ipsilon traffic */ static const value_string ipsilon_type_vals[] = { { TRAF_ST_UNKNOWN, "Unknown Ipsilon traffic type" }, { TRAF_ST_IPSILON_FT0, "Flow type 0" }, { TRAF_ST_IPSILON_FT1, "Flow type 1" }, { TRAF_ST_IPSILON_FT2, "Flow type 2" }, { 0, NULL } }; static gboolean capture_atm(const guchar *pd, int offset, int len, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header) { if (pseudo_header->atm.aal == AAL_5) { return try_capture_dissector("atm.aal5.type", pseudo_header->atm.type, pd, offset, len, cpinfo, pseudo_header); } return FALSE; } static void dissect_reassembled_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_item *atm_ti, proto_tree *atm_tree, gboolean truncated, struct atm_phdr *atm_info, gboolean pseudowire_mode) { guint length, reported_length; guint16 aal5_length; int pad_length; tvbuff_t *next_tvb; guint32 crc; guint32 calc_crc; gboolean decoded; /* * This is reassembled traffic, so the cell headers are missing; * show the traffic type for AAL5 traffic, and the VPI and VCI, * from the pseudo-header. */ if (atm_info->aal == AAL_5) { proto_tree_add_uint(atm_tree, hf_atm_traffic_type, tvb, 0, 0, atm_info->type); switch (atm_info->type) { case TRAF_VCMX: proto_tree_add_uint(atm_tree, hf_atm_traffic_vcmx, tvb, 0, 0, atm_info->subtype); break; case TRAF_LANE: proto_tree_add_uint(atm_tree, hf_atm_traffic_lane, tvb, 0, 0, atm_info->subtype); break; case TRAF_IPSILON: proto_tree_add_uint(atm_tree, hf_atm_traffic_ipsilon, tvb, 0, 0, atm_info->subtype); break; } } if (!pseudowire_mode) { proto_tree_add_uint(atm_tree, hf_atm_vpi, tvb, 0, 0, atm_info->vpi); proto_tree_add_uint(atm_tree, hf_atm_vci, tvb, 0, 0, atm_info->vci); /* Also show vpi/vci in info column */ col_append_fstr(pinfo->cinfo, COL_INFO, " VPI=%u, VCI=%u", atm_info->vpi, atm_info->vci); } next_tvb = tvb; if (truncated || atm_info->flags & ATM_REASSEMBLY_ERROR) { /* * The packet data does not include stuff such as the AAL5 * trailer, either because it was explicitly left out or because * reassembly failed. */ if (atm_info->cells != 0) { /* * If the cell count is 0, assume it means we don't know how * many cells it was. * * XXX - also assume it means we don't know what was in the AAL5 * trailer. We may, however, find some capture program that can * give us the AAL5 trailer information but not the cell count, * in which case we need some other way of indicating whether we * have the AAL5 trailer information. */ if (tree) { proto_tree_add_uint(atm_tree, hf_atm_cells, tvb, 0, 0, atm_info->cells); proto_tree_add_uint(atm_tree, hf_atm_aal5_uu, tvb, 0, 0, atm_info->aal5t_u2u >> 8); proto_tree_add_uint(atm_tree, hf_atm_aal5_cpi, tvb, 0, 0, atm_info->aal5t_u2u & 0xFF); proto_tree_add_uint(atm_tree, hf_atm_aal5_len, tvb, 0, 0, atm_info->aal5t_len); proto_tree_add_uint(atm_tree, hf_atm_aal5_crc, tvb, 0, 0, atm_info->aal5t_chksum); } } } else { /* * The packet data includes stuff such as the AAL5 trailer, if * it wasn't cut off by the snapshot length, and ATM reassembly * succeeded. * Decode the trailer, if present, and then chop it off. */ length = tvb_captured_length(tvb); reported_length = tvb_reported_length(tvb); if ((reported_length % 48) == 0) { /* * Reported length is a multiple of 48, so we can presumably * divide it by 48 to get the number of cells. */ proto_tree_add_uint(atm_tree, hf_atm_cells, tvb, 0, 0, reported_length/48); } if ((atm_info->aal == AAL_5 || atm_info->aal == AAL_SIGNALLING) && length >= reported_length) { /* * XXX - what if the packet is truncated? Can that happen? * What if you capture with Windows Sniffer on an ATM link * and tell it not to save the entire packet? What happens * to the trailer? */ aal5_length = tvb_get_ntohs(tvb, length - 6); /* * Check for sanity in the AAL5 length. It must be > 0 * and must be less than the amount of space left after * we remove the trailer. * * If it's not sane, assume we don't have a trailer. */ if (aal5_length > 0 && aal5_length <= length - 8) { /* * How much padding is there? */ pad_length = length - aal5_length - 8; /* * There is no reason for more than 47 bytes of padding. * The most padding you can have would be 7 bytes at the * end of the next-to-last cell (8 bytes after the end of * the data means you can fit the trailer in that cell), * plus 40 bytes in the last cell (with the last 8 bytes * being padding). * * If there's more than 47 bytes of padding, assume we don't * have a trailer. */ if (pad_length <= 47) { if (tree) { proto_item *ti; if (pad_length > 0) { proto_tree_add_item(atm_tree, hf_atm_padding, tvb, aal5_length, pad_length, ENC_NA); } proto_tree_add_item(atm_tree, hf_atm_aal5_uu, tvb, length - 8, 1, ENC_BIG_ENDIAN); proto_tree_add_item(atm_tree, hf_atm_aal5_cpi, tvb, length - 7, 1, ENC_BIG_ENDIAN); proto_tree_add_item(atm_tree, hf_atm_aal5_len, tvb, length - 6, 2, ENC_BIG_ENDIAN); crc = tvb_get_ntohl(tvb, length - 4); calc_crc = crc32_mpeg2_tvb(tvb, length); ti = proto_tree_add_uint(atm_tree, hf_atm_aal5_crc, tvb, length - 4, 4, crc); proto_item_append_text(ti, (calc_crc == 0xC704DD7B) ? " (correct)" : " (incorrect)"); } next_tvb = tvb_new_subset_length(tvb, 0, aal5_length); } } } } /* * First check whether custom dissection table * was set up to dissect this VPI+VCI combination */ if (dissector_try_uint_new(atm_reassembled_vpi_vci_table, ((atm_info->vpi) << 16) | atm_info->vci, next_tvb, pinfo, tree, TRUE, atm_info)) { return; } decoded = FALSE; /* * Don't try to dissect the payload of PDUs with a reassembly * error. */ switch (atm_info->aal) { case AAL_SIGNALLING: if (!(atm_info->flags & ATM_REASSEMBLY_ERROR)) { call_dissector(sscop_handle, next_tvb, pinfo, tree); decoded = TRUE; } break; case AAL_5: if (!(atm_info->flags & ATM_REASSEMBLY_ERROR)) { if (dissector_try_uint_new(atm_type_aal5_table, atm_info->type, next_tvb, pinfo, tree, TRUE, atm_info)) { decoded = TRUE; } else { if (tvb_reported_length(next_tvb) > 7) /* sizeof(octet) */ { guint8 octet[8]; tvb_memcpy(next_tvb, octet, 0, sizeof(octet)); if (octet[0] == 0xaa && octet[1] == 0xaa && octet[2] == 0x03) /* LLC SNAP as per RFC2684 */ { call_dissector(llc_handle, next_tvb, pinfo, tree); decoded = TRUE; } else if ((pntoh16(octet) & 0xff) == PPP_IP) { call_dissector(ppp_handle, next_tvb, pinfo, tree); decoded = TRUE; } else if (pntoh16(octet) == 0x00) { /* * Assume VC multiplexed bridged Ethernet. * Whether there's an FCS is an option negotiated * over the VC, so we call the "do heuristic checks * to see if there's an FCS" version of the Ethernet * dissector. * * See RFC 2684 section 6.2 "VC Multiplexing of Bridged * Protocols". */ proto_tree_add_item(tree, hf_atm_padding, tvb, 0, 2, ENC_NA); next_tvb = tvb_new_subset_remaining(tvb, 2); call_dissector(eth_maybefcs_handle, next_tvb, pinfo, tree); decoded = TRUE; } else if (octet[2] == 0x03 && /* NLPID */ ((octet[3] == 0xcc || /* IPv4 */ octet[3] == 0x8e) || /* IPv6 */ (octet[3] == 0x00 && /* Eth */ octet[4] == 0x80))) /* Eth */ { /* assume network interworking with FR 2 byte header */ call_dissector(fr_handle, next_tvb, pinfo, tree); decoded = TRUE; } else if (octet[4] == 0x03 && /* NLPID */ ((octet[5] == 0xcc || /* IPv4 */ octet[5] == 0x8e) || /* IPv6 */ (octet[5] == 0x00 && /* Eth */ octet[6] == 0x80))) /* Eth */ { /* assume network interworking with FR 4 byte header */ call_dissector(fr_handle, next_tvb, pinfo, tree); decoded = TRUE; } else if (((octet[0] & 0xf0)== 0x40) || ((octet[0] & 0xf0) == 0x60)) { call_dissector(ip_handle, next_tvb, pinfo, tree); decoded = TRUE; } } } break; } break; case AAL_2: proto_tree_add_uint(atm_tree, hf_atm_cid, tvb, 0, 0, atm_info->aal2_cid); proto_item_append_text(atm_ti, " (vpi=%u vci=%u cid=%u)", atm_info->vpi, atm_info->vci, atm_info->aal2_cid); if (!(atm_info->flags & ATM_REASSEMBLY_ERROR)) { if (atm_info->flags & ATM_AAL2_NOPHDR) { next_tvb = tvb; } else { /* Skip first 4 bytes of message - side - length - UUI Ignoring for now... */ next_tvb = tvb_new_subset_remaining(tvb, 4); } if (dissector_try_uint(atm_type_aal2_table, atm_info->type, next_tvb, pinfo, tree)) { decoded = TRUE; } } break; default: /* Dump it as raw data. */ break; } if (!decoded) { /* Dump it as raw data. */ call_data_dissector(next_tvb, pinfo, tree); } } /* * Charles Michael Heard's HEC code, from * * http://www.cell-relay.com/cell-relay/publications/software/CRC/32bitCRC.tutorial.html * * with the syndrome and error position tables initialized with values * computed by his "gen_syndrome_table()" and "gen_err_posn_table()" routines, * rather than by calling those routines at run time, and with various data * type cleanups and changes not to correct the header if a correctible * error was detected. */ #define COSET_LEADER 0x055 /* x^6 + x^4 + x^2 + 1 */ static const guint8 syndrome_table[256] = { 0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d, 0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d, 0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5, 0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd, 0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd, 0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea, 0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2, 0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a, 0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32, 0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a, 0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42, 0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a, 0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c, 0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4, 0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec, 0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4, 0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c, 0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44, 0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c, 0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34, 0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b, 0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d, 0x64, 0x63, 0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b, 0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13, 0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb, 0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83, 0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb, 0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3, }; #define NO_ERROR_DETECTED -128 #define UNCORRECTIBLE_ERROR 128 static const int err_posn_table[256] = { NO_ERROR_DETECTED, 39, 38, UNCORRECTIBLE_ERROR, 37, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 31, 36, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 8, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 30, UNCORRECTIBLE_ERROR, 35, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 23, 7, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 29, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 34, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 22, UNCORRECTIBLE_ERROR, 6, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 0, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 28, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 33, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 10, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 12, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 21, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 19, 5, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 17, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 3, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 15, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 27, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 32, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 9, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 24, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 1, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 11, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 20, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 13, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 18, UNCORRECTIBLE_ERROR, 4, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 16, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 25, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 2, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 14, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, 26, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, UNCORRECTIBLE_ERROR, }; /* * Return an indication of whether there was an error in the cell header * and, if so, where the error was, if it was correctable. */ static int get_header_err(const guint8 *cell_header) { register guint8 syndrome; register int i, err_posn; syndrome = 0; for (i = 0; i < 4; i++) syndrome = syndrome_table[syndrome ^ cell_header[i]]; syndrome ^= cell_header[4] ^ COSET_LEADER; err_posn = err_posn_table [syndrome]; if (err_posn < 0) return NO_ERROR_DETECTED; else if (err_posn < 40) return err_posn; else return UNCORRECTIBLE_ERROR; } const value_string atm_pt_vals[] = { { 0, "User data cell, congestion not experienced, SDU-type = 0" }, { 1, "User data cell, congestion not experienced, SDU-type = 1" }, { 2, "User data cell, congestion experienced, SDU-type = 0" }, { 3, "User data cell, congestion experienced, SDU-type = 1" }, { 4, "Segment OAM F5 flow related cell" }, { 5, "End-to-end OAM F5 flow related cell" }, { 6, "VC resource management cell" }, { 0, NULL } }; static const value_string st_vals[] = { { 2, "BOM" }, { 0, "COM" }, { 1, "EOM" }, { 3, "SSM" }, { 0, NULL } }; #define OAM_TYPE_FM 1 /* Fault Management */ #define OAM_TYPE_PM 2 /* Performance Management */ #define OAM_TYPE_AD 8 /* Activation/Deactivation */ static const value_string oam_type_vals[] = { { OAM_TYPE_FM, "Fault Management" }, { OAM_TYPE_PM, "Performance Management" }, { OAM_TYPE_AD, "Activation/Deactivation" }, { 0, NULL } }; static const value_string ft_fm_vals[] = { { 0, "Alarm Indication Signal" }, { 1, "Far End Receive Failure" }, { 8, "OAM Cell Loopback" }, { 4, "Continuity Check" }, { 0, NULL } }; static const value_string ft_pm_vals[] = { { 0, "Forward Monitoring" }, { 1, "Backward Reporting" }, { 2, "Monitoring and Reporting" }, { 0, NULL } }; static const value_string ft_ad_vals[] = { { 0, "Performance Monitoring" }, { 1, "Continuity Check" }, { 0, NULL } }; static void dissect_atm_cell_payload(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, guint aal, gboolean fill_columns, struct atm_phdr *atm_info) { proto_tree *aal_tree; proto_item *ti; guint8 octet; gint length; guint16 aal3_4_hdr, crc10; tvbuff_t *next_tvb; next_tvb = tvb_new_subset_remaining(tvb, offset); /* * First check whether custom dissection table * was set up to dissect this VPI+VCI combination */ if (dissector_try_uint_new(atm_cell_payload_vpi_vci_table, ((atm_info->vpi) << 16) | atm_info->vci, next_tvb, pinfo, tree, TRUE, atm_info)) { return; } switch (aal) { case AAL_1: col_set_str(pinfo->cinfo, COL_PROTOCOL, "AAL1"); col_clear(pinfo->cinfo, COL_INFO); ti = proto_tree_add_item(tree, proto_aal1, tvb, offset, -1, ENC_NA); aal_tree = proto_item_add_subtree(ti, ett_aal1); octet = tvb_get_guint8(tvb, offset); proto_tree_add_item(aal_tree, hf_atm_aa1_csi, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(aal_tree, hf_atm_aa1_seq_count, tvb, offset, 1, ENC_BIG_ENDIAN); col_add_fstr(pinfo->cinfo, COL_INFO, "Sequence count = %u", (octet >> 4) & 0x7); proto_tree_add_item(aal_tree, hf_atm_aa1_crc, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(aal_tree, hf_atm_aa1_parity, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; proto_tree_add_item(aal_tree, hf_atm_aa1_payload, tvb, offset, 47, ENC_NA); break; case AAL_3_4: /* * XXX - or should this be the CS PDU? */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "AAL3/4"); col_clear(pinfo->cinfo, COL_INFO); ti = proto_tree_add_item(tree, proto_aal3_4, tvb, offset, -1, ENC_NA); aal_tree = proto_item_add_subtree(ti, ett_aal3_4); aal3_4_hdr = tvb_get_ntohs(tvb, offset); col_add_fstr(pinfo->cinfo, COL_INFO, "%s, sequence number = %u", val_to_str(aal3_4_hdr >> 14, st_vals, "Unknown (%u)"), (aal3_4_hdr >> 10) & 0xF); proto_tree_add_item(aal_tree, hf_atm_aal3_4_seg_type, tvb, offset, 2, ENC_BIG_ENDIAN); proto_tree_add_item(aal_tree, hf_atm_aal3_4_seq_num, tvb, offset, 2, ENC_BIG_ENDIAN); proto_tree_add_item(aal_tree, hf_atm_aal3_4_multiplex_id, tvb, offset, 2, ENC_BIG_ENDIAN); length = tvb_reported_length_remaining(tvb, offset); crc10 = update_crc10_by_bytes_tvb(0, tvb, offset, length); offset += 2; proto_tree_add_item(aal_tree, hf_atm_aal3_4_information, tvb, offset, 44, ENC_NA); offset += 44; proto_tree_add_item(aal_tree, hf_atm_aal3_4_length_indicator, tvb, offset, 2, ENC_BIG_ENDIAN); ti = proto_tree_add_item(aal_tree, hf_atm_aal3_4_crc, tvb, offset, 2, ENC_BIG_ENDIAN); proto_item_append_text(ti, " (%s)", (crc10 == 0) ? " (correct)" : " (incorrect)"); break; case AAL_OAMCELL: if (fill_columns) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "OAM AAL"); col_clear(pinfo->cinfo, COL_INFO); } ti = proto_tree_add_item(tree, proto_oamaal, tvb, offset, -1, ENC_NA); aal_tree = proto_item_add_subtree(ti, ett_oamaal); octet = tvb_get_guint8(tvb, offset); if (fill_columns) { col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(octet >> 4, oam_type_vals, "Unknown (%u)")); } proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type, tvb, offset, 1, ENC_BIG_ENDIAN); switch (octet >> 4) { case OAM_TYPE_FM: proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_fm, tvb, offset, 1, ENC_BIG_ENDIAN); break; case OAM_TYPE_PM: proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_pm, tvb, offset, 1, ENC_BIG_ENDIAN); break; case OAM_TYPE_AD: proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_ad, tvb, offset, 1, ENC_BIG_ENDIAN); break; default: proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_type_ft, tvb, offset, 1, ENC_BIG_ENDIAN); break; } length = tvb_reported_length_remaining(tvb, offset); crc10 = update_crc10_by_bytes_tvb(0, tvb, offset, length); offset += 1; proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_func_spec, tvb, offset, 45, ENC_NA); offset += 45; ti = proto_tree_add_item(aal_tree, hf_atm_aal_oamcell_crc, tvb, offset, 2, ENC_BIG_ENDIAN); proto_item_append_text(ti, " (%s)", (crc10 == 0) ? " (correct)" : " (incorrect)"); break; default: next_tvb = tvb_new_subset_remaining(tvb, offset); call_data_dissector(next_tvb, pinfo, tree); break; } } /* * Check for OAM cells. * OAM F4 is VCI 3 or 4 and PT 0X0. * OAM F5 is PT 10X. */ gboolean atm_is_oam_cell(const guint16 vci, const guint8 pt) { return (((vci == 3 || vci == 4) && ((pt & 0x5) == 0)) || ((pt & 0x6) == 0x4)); } static void dissect_atm_cell(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_tree *atm_tree, guint aal, gboolean nni, gboolean crc_stripped, const struct atm_phdr *atm_info) { int offset; proto_item *ti; guint8 octet, pt; int err; guint16 vpi, vci; struct atm_phdr atm_info_local; if (!nni) { /* * FF: ITU-T I.361 (Section 2.2) defines the cell header format * and encoding at UNI reference point as: * * 8 7 6 5 4 3 2 1 * +-+-+-+-+-+-+-+-+ * | GFC | VPI | * +-+-+-+-+-+-+-+-+ * | VPI | VCI | * +-+-+-+-+-+-+-+-+ * | VCI | * +-+-+-+-+-+-+-+-+ * | VCI | PT |C| * +-+-+-+-+-+-+-+-+ * | HEC (CRC) | * +-+-+-+-+-+-+-+-+ */ octet = tvb_get_guint8(tvb, 0); proto_tree_add_item(atm_tree, hf_atm_gfc, tvb, 0, 1, ENC_NA); vpi = (octet & 0xF) << 4; octet = tvb_get_guint8(tvb, 1); vpi |= octet >> 4; proto_tree_add_uint(atm_tree, hf_atm_vpi, tvb, 0, 2, vpi); } else { /* * FF: ITU-T I.361 (Section 2.3) defines the cell header format * and encoding at NNI reference point as: * * 8 7 6 5 4 3 2 1 * +-+-+-+-+-+-+-+-+ * | VPI | * +-+-+-+-+-+-+-+-+ * | VPI | VCI | * +-+-+-+-+-+-+-+-+ * | VCI | * +-+-+-+-+-+-+-+-+ * | VCI | PT |C| * +-+-+-+-+-+-+-+-+ * | HEC (CRC) | * +-+-+-+-+-+-+-+-+ */ octet = tvb_get_guint8(tvb, 0); vpi = octet << 4; octet = tvb_get_guint8(tvb, 1); vpi |= (octet & 0xF0) >> 4; proto_tree_add_uint(atm_tree, hf_atm_vpi, tvb, 0, 2, vpi); } vci = (octet & 0x0F) << 12; octet = tvb_get_guint8(tvb, 2); vci |= octet << 4; octet = tvb_get_guint8(tvb, 3); vci |= octet >> 4; proto_tree_add_uint(atm_tree, hf_atm_vci, tvb, 1, 3, vci); pt = (octet >> 1) & 0x7; proto_tree_add_item(atm_tree, hf_atm_payload_type, tvb, 3, 1, ENC_BIG_ENDIAN); proto_tree_add_item(atm_tree, hf_atm_cell_loss_priority, tvb, 3, 1, ENC_BIG_ENDIAN); if (!crc_stripped) { /* * FF: parse the Header Error Check (HEC). */ ti = proto_tree_add_item(atm_tree, hf_atm_header_error_check, tvb, 4, 1, ENC_BIG_ENDIAN); err = get_header_err((const guint8*)tvb_memdup(pinfo->pool, tvb, 0, 5)); if (err == NO_ERROR_DETECTED) proto_item_append_text(ti, " (correct)"); else if (err == UNCORRECTIBLE_ERROR) proto_item_append_text(ti, " (uncorrectable error)"); else proto_item_append_text(ti, " (error in bit %d)", err); offset = 5; } else { /* * FF: in some encapsulation modes (e.g. RFC 4717, ATM N-to-One * Cell Mode) the Header Error Check (HEC) field is stripped. * So we do nothing here. */ offset = 4; } /* * Check for OAM cells. * XXX - do this for all AAL values, overriding whatever information * Wiretap got from the file? */ if (aal == AAL_USER || aal == AAL_UNKNOWN) { if (atm_is_oam_cell(vci,pt)) { aal = AAL_OAMCELL; } } memset(&atm_info_local, 0, sizeof(atm_info_local)); if (atm_info) { atm_info_local.flags = atm_info->flags; atm_info_local.aal = atm_info->aal; atm_info_local.type = atm_info->type; atm_info_local.subtype = atm_info->subtype; atm_info_local.vpi = atm_info->vpi; atm_info_local.vci = atm_info->vci; atm_info_local.aal2_cid = atm_info->aal2_cid; atm_info_local.channel = atm_info->channel; atm_info_local.cells = atm_info->cells; atm_info_local.aal5t_u2u = atm_info->aal5t_u2u; atm_info_local.aal5t_len = atm_info->aal5t_len; atm_info_local.aal5t_chksum = atm_info->aal5t_chksum; } else { atm_info_local.aal = aal; atm_info_local.type = pt; atm_info_local.vpi = vpi; atm_info_local.vci = vci; } dissect_atm_cell_payload(tvb, offset, pinfo, tree, aal, TRUE, &atm_info_local); } static int dissect_atm_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean truncated, struct atm_phdr *atm_info, gboolean pseudowire_mode) { proto_tree *atm_tree = NULL; proto_item *atm_ti = NULL; if ( atm_info->aal == AAL_5 && atm_info->type == TRAF_LANE && dissect_lanesscop ) { atm_info->aal = AAL_SIGNALLING; } col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM"); if (!pseudowire_mode) { switch (atm_info->channel) { case 0: /* Traffic from DTE to DCE. */ col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DCE"); col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DTE"); break; case 1: /* Traffic from DCE to DTE. */ col_set_str(pinfo->cinfo, COL_RES_DL_DST, "DTE"); col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "DCE"); break; } } if (atm_info->aal == AAL_5) { col_add_fstr(pinfo->cinfo, COL_INFO, "AAL5 %s", val_to_str(atm_info->type, aal5_hltype_vals, "Unknown traffic type (%u)")); } else { col_add_str(pinfo->cinfo, COL_INFO, val_to_str(atm_info->aal, aal_vals, "Unknown AAL (%u)")); } if (tree) { atm_ti = proto_tree_add_item(tree, proto_atm, tvb, 0, -1, ENC_NA); atm_tree = proto_item_add_subtree(atm_ti, ett_atm); if (!pseudowire_mode) { proto_tree_add_uint(atm_tree, hf_atm_channel, tvb, 0, 0, atm_info->channel); if (atm_info->flags & ATM_REASSEMBLY_ERROR) expert_add_info(pinfo, atm_ti, &ei_atm_reassembly_failed); } proto_tree_add_uint_format_value(atm_tree, hf_atm_aal, tvb, 0, 0, atm_info->aal, "%s", val_to_str(atm_info->aal, aal_vals, "Unknown AAL (%u)")); } if (atm_info->flags & ATM_RAW_CELL) { /* This is a single cell, with the cell header at the beginning. */ if (atm_info->flags & ATM_NO_HEC) { proto_item_set_len(atm_ti, 4); } else { proto_item_set_len(atm_ti, 5); } dissect_atm_cell(tvb, pinfo, tree, atm_tree, atm_info->aal, FALSE, atm_info->flags & ATM_NO_HEC, atm_info); } else { /* This is a reassembled PDU. */ /* * ATM dissector is used as "sub-dissector" for ATM pseudowires. * In such cases, the dissector data parameter is used to pass info from/to * PW dissector to ATM dissector. For decoding normal ATM traffic * data parameter should be NULL. */ dissect_reassembled_pdu(tvb, pinfo, tree, atm_tree, atm_ti, truncated, atm_info, pseudowire_mode); } return tvb_reported_length(tvb); } static int dissect_atm_truncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { struct atm_phdr *atm_info = (struct atm_phdr *)data; DISSECTOR_ASSERT(atm_info != NULL); return dissect_atm_common(tvb, pinfo, tree, TRUE, atm_info, FALSE); } static int dissect_atm_pw_truncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { struct atm_phdr *atm_info = (struct atm_phdr *)data; DISSECTOR_ASSERT(atm_info != NULL); return dissect_atm_common(tvb, pinfo, tree, TRUE, atm_info, TRUE); } static int dissect_atm_untruncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { struct atm_phdr *atm_info = (struct atm_phdr *)data; DISSECTOR_ASSERT(atm_info != NULL); return dissect_atm_common(tvb, pinfo, tree, FALSE, atm_info, FALSE); } static int dissect_atm_pw_untruncated(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { struct atm_phdr *atm_info = (struct atm_phdr *)data; DISSECTOR_ASSERT(atm_info != NULL); return dissect_atm_common(tvb, pinfo, tree, FALSE, atm_info, TRUE); } static int dissect_atm_oam_cell(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree *atm_tree; proto_item *atm_ti; col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM"); atm_ti = proto_tree_add_item(tree, proto_atm, tvb, 0, 0, ENC_NA); atm_tree = proto_item_add_subtree(atm_ti, ett_atm); dissect_atm_cell(tvb, pinfo, tree, atm_tree, AAL_OAMCELL, FALSE, FALSE, NULL); return tvb_reported_length(tvb); } static int dissect_atm_pw_oam_cell(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) { struct pw_atm_phdr *pw_atm_info = (struct pw_atm_phdr *)data; DISSECTOR_ASSERT(pw_atm_info != NULL); col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATM"); dissect_atm_cell_payload(tvb, 0, pinfo, tree, AAL_OAMCELL, pw_atm_info->enable_fill_columns_by_atm_dissector, &pw_atm_info->info); return tvb_reported_length(tvb); } static void atm_prompt(packet_info *pinfo _U_, gchar* result) { snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Decode AAL2 traffic as"); } static gpointer atm_value(packet_info *pinfo) { return GUINT_TO_POINTER((guint)pinfo->pseudo_header->atm.type); } void proto_register_atm(void) { static hf_register_info hf[] = { { &hf_atm_aal, { "AAL", "atm.aal", FT_UINT8, BASE_DEC, VALS(aal_vals), 0x0, NULL, HFILL }}, { &hf_atm_gfc, { "GFC", "atm.GFC", FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL }}, { &hf_atm_vpi, { "VPI", "atm.vpi", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_vci, { "VCI", "atm.vci", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_cid, { "CID", "atm.cid", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_reserved, { "Reserved", "atm.reserved", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_client_client, { "LE Client", "atm.le_client.client", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_lan_destination_tag, { "Tag", "atm.lan_destination.tag", FT_UINT16, BASE_HEX, VALS(le_control_landest_tag_vals), 0x0, NULL, HFILL }}, { &hf_atm_lan_destination_mac, { "MAC address", "atm.lan_destination.mac", FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_tlv_type, { "TLV Type", "atm.le_control.tlv_type", FT_UINT32, BASE_HEX, VALS(le_tlv_type_vals), 0x0, NULL, HFILL }}, { &hf_atm_le_control_tlv_length, { "TLV Length", "atm.le_control.tlv_length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_lan_destination_route_desc, { "Route descriptor", "atm.lan_destination.route_desc", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_lan_destination_lan_id, { "LAN ID", "atm.lan_destination.lan_id", FT_UINT16, BASE_DEC, NULL, 0xFFF0, NULL, HFILL }}, { &hf_atm_lan_destination_bridge_num, { "Bridge number", "atm.lan_destination.bridge_num", FT_UINT16, BASE_DEC, NULL, 0x000F, NULL, HFILL }}, { &hf_atm_source_atm, { "Source ATM address", "atm.source_atm", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_target_atm, { "Target ATM address", "atm.target_atm", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_configure_join_frame_lan_type, { "LAN type", "atm.le_configure_join_frame.lan_type", FT_UINT8, BASE_HEX, VALS(le_control_lan_type_vals), 0x0, NULL, HFILL }}, { &hf_atm_le_configure_join_frame_max_frame_size, { "Maximum frame size", "atm.le_configure_join_frame.max_frame_size", FT_UINT8, BASE_HEX, VALS(le_control_frame_size_vals), 0x0, NULL, HFILL }}, { &hf_atm_le_configure_join_frame_num_tlvs, { "Number of TLVs", "atm.le_configure_join_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_configure_join_frame_elan_name_size, { "ELAN name size", "atm.le_configure_join_frame.elan_name_size", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_registration_frame_num_tlvs, { "Number of TLVs", "atm.le_registration_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_arp_frame_num_tlvs, { "Number of TLVs", "atm.le_arp_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_verify_frame_num_tlvs, { "Number of TLVs", "atm.le_verify_frame.num_tlvs", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_configure_join_frame_elan_name, { "ELAN name", "atm.le_configure_join_frame.elan_name", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_marker, { "Marker", "atm.le_control.marker", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_protocol, { "Protocol", "atm.le_control.protocol", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_version, { "Version", "atm.le_control.version", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_opcode, { "Opcode", "atm.le_control.opcode", FT_UINT16, BASE_HEX, VALS(le_control_opcode_vals), 0x0, NULL, HFILL }}, { &hf_atm_le_control_status, { "Status", "atm.le_control.status", FT_UINT16, BASE_HEX, VALS(le_control_status_vals), 0x0, NULL, HFILL }}, { &hf_atm_le_control_transaction_id, { "Transaction ID", "atm.le_control.transaction_id", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_requester_lecid, { "Requester LECID", "atm.le_control.requester_lecid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_flags, { "Flags", "atm.le_control.flag", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_le_control_flag_v2_capable, { "V2 capable", "atm.le_control.flag.v2_capable", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0002, NULL, HFILL }}, { &hf_atm_le_control_flag_selective_multicast, { "Selective multicast", "atm.le_control.flag.selective_multicast", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0004, NULL, HFILL }}, { &hf_atm_le_control_flag_v2_required, { "V2 required", "atm.le_control.flag.v2_required", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0008, NULL, HFILL }}, { &hf_atm_le_control_flag_proxy, { "Proxy", "atm.le_control.flag.flag_proxy", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0080, NULL, HFILL }}, { &hf_atm_le_control_flag_exclude_explorer_frames, { "Exclude explorer frames", "atm.le_control.flag.exclude_explorer_frames", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0200, NULL, HFILL }}, { &hf_atm_le_control_flag_address, { "Address", "atm.le_control.flag.address", FT_BOOLEAN, 16, TFS(&tfs_yes_no), 0x0001, NULL, HFILL }}, { &hf_atm_le_control_topology_change, { "Topology change", "atm.le_control.flag.topology_change", FT_BOOLEAN, 16, TFS(&tfs_remote_local), 0x0100, NULL, HFILL }}, { &hf_atm_traffic_type, { "Traffic type", "atm.traffic_type", FT_UINT8, BASE_DEC, VALS(aal5_hltype_vals), 0x0, NULL, HFILL }}, { &hf_atm_traffic_vcmx, { "VC multiplexed traffic type", "atm.traffic.vcmx", FT_UINT8, BASE_DEC, VALS(vcmx_type_vals), 0x0, NULL, HFILL }}, { &hf_atm_traffic_lane, { "LANE traffic type", "atm.traffic.lane", FT_UINT8, BASE_DEC, VALS(lane_type_vals), 0x0, NULL, HFILL }}, { &hf_atm_traffic_ipsilon, { "Ipsilon traffic type", "atm.traffic.ipsilon", FT_UINT8, BASE_DEC, VALS(ipsilon_type_vals), 0x0, NULL, HFILL }}, { &hf_atm_cells, { "Cells", "atm.cells", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_aal5_uu, { "AAL5 UU", "atm.hf_atm.aal5t_uu", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_aal5_cpi, { "AAL5 CPI", "atm.hf_atm.aal5t_cpi", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_aal5_len, { "AAL5 len", "atm.aal5t_len", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_atm_aal5_crc, { "AAL5 CRC", "atm.aal5t_crc", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_atm_payload_type, { "Payload Type", "atm.payload_type", FT_UINT8, BASE_DEC, NULL, 0x0E, NULL, HFILL }}, { &hf_atm_cell_loss_priority, { "Cell Loss Priority", "atm.cell_loss_priority", FT_BOOLEAN, 8, TFS(&tfs_low_high_priority), 0x01, NULL, HFILL }}, { &hf_atm_header_error_check, { "Header Error Check", "atm.header_error_check", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL }}, { &hf_atm_channel, { "Channel", "atm.channel", FT_UINT16, BASE_DEC, VALS(atm_channel_vals), 0, NULL, HFILL }}, { &hf_atm_aa1_csi, { "CSI", "atm.aa1.csi", FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL }}, { &hf_atm_aa1_seq_count, { "Sequence Count", "atm.aa1.seq_count", FT_UINT8, BASE_DEC, NULL, 0x70, NULL, HFILL }}, { &hf_atm_aa1_crc, { "CRC", "atm.aa1.crc", FT_UINT8, BASE_DEC, NULL, 0x08, NULL, HFILL }}, { &hf_atm_aa1_parity, { "Parity", "atm.aa1.parity", FT_UINT8, BASE_DEC, NULL, 0x07, NULL, HFILL }}, { &hf_atm_aa1_payload, { "Payload", "atm.aa1.payload", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_aal3_4_seg_type, { "Segment Type", "atm.aal3_4.seg_type", FT_UINT16, BASE_DEC, VALS(st_vals), 0xC000, NULL, HFILL }}, { &hf_atm_aal3_4_seq_num, { "Sequence Number", "atm.aal3_4.seq_num", FT_UINT16, BASE_DEC, NULL, 0x3C00, NULL, HFILL }}, { &hf_atm_aal3_4_multiplex_id, { "Multiplex ID", "atm.aal3_4.multiplex_id", FT_UINT16, BASE_DEC, NULL, 0x03FF, NULL, HFILL }}, { &hf_atm_aal3_4_information, { "Information", "atm.aal3_4.information", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_aal3_4_length_indicator, { "Length Indicator", "atm.aal3_4.length_indicator", FT_UINT16, BASE_DEC, VALS(st_vals), 0xFC00, NULL, HFILL }}, { &hf_atm_aal3_4_crc, { "CRC", "atm.aal3_4.crc", FT_UINT16, BASE_DEC, NULL, 0x03FF, NULL, HFILL }}, { &hf_atm_aal_oamcell_type, { "OAM Type", "atm.aal_oamcell.type", FT_UINT8, BASE_DEC, VALS(oam_type_vals), 0xF0, NULL, HFILL }}, { &hf_atm_aal_oamcell_type_fm, { "Function Type", "atm.aal_oamcell.type.fm", FT_UINT8, BASE_DEC, VALS(ft_fm_vals), 0x0F, NULL, HFILL }}, { &hf_atm_aal_oamcell_type_pm, { "Function Type", "atm.aal_oamcell.type.pm", FT_UINT8, BASE_DEC, VALS(ft_pm_vals), 0x0F, NULL, HFILL }}, { &hf_atm_aal_oamcell_type_ad, { "Function Type", "atm.aal_oamcell.type.ad", FT_UINT8, BASE_DEC, VALS(ft_ad_vals), 0x0F, NULL, HFILL }}, { &hf_atm_aal_oamcell_type_ft, { "Function Type", "atm.aal_oamcell.type.ft", FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL }}, { &hf_atm_aal_oamcell_func_spec, { "Function-specific information", "atm.aal_oamcell.func_spec", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_atm_aal_oamcell_crc, { "CRC-10", "atm.aal_oamcell.crc", FT_UINT16, BASE_HEX, NULL, 0x3FF, NULL, HFILL }}, { &hf_atm_padding, { "Padding", "atm.padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }}, }; static gint *ett[] = { &ett_atm, &ett_ilmi, &ett_aal1, &ett_aal3_4, &ett_oamaal, &ett_atm_lane, &ett_atm_lane_lc_lan_dest, &ett_atm_lane_lc_lan_dest_rd, &ett_atm_lane_lc_flags, &ett_atm_lane_lc_tlv, }; static ei_register_info ei[] = { { &ei_atm_reassembly_failed, { "atm.reassembly_failed", PI_REASSEMBLE, PI_ERROR, "PDU reassembly failed", EXPFILL }}, }; expert_module_t* expert_atm; module_t *atm_module; /* Decode As handling */ static build_valid_func atm_da_build_value[1] = {atm_value}; static decode_as_value_t atm_da_values = {atm_prompt, 1, atm_da_build_value}; static decode_as_t atm_da = {"atm", "atm.aal2.type", 1, 0, &atm_da_values, NULL, NULL, decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL}; proto_atm = proto_register_protocol("Asynchronous Transfer Mode", "ATM", "atm"); proto_aal1 = proto_register_protocol("ATM AAL1", "AAL1", "aal1"); proto_aal3_4 = proto_register_protocol("ATM AAL3/4", "AAL3/4", "aal3_4"); proto_oamaal = proto_register_protocol("ATM OAM AAL", "OAM AAL", "oamaal"); proto_register_field_array(proto_atm, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_atm = expert_register_protocol(proto_atm); expert_register_field_array(expert_atm, ei, array_length(ei)); proto_ilmi = proto_register_protocol("ILMI", "ILMI", "ilmi"); proto_atm_lane = proto_register_protocol("ATM LAN Emulation", "ATM LANE", "lane"); atm_type_aal2_table = register_dissector_table("atm.aal2.type", "ATM AAL_2 type", proto_atm, FT_UINT32, BASE_DEC); atm_type_aal5_table = register_dissector_table("atm.aal5.type", "ATM AAL_5 type", proto_atm, FT_UINT32, BASE_DEC); atm_cell_payload_vpi_vci_table = register_dissector_table("atm.cell_payload.vpi_vci", "ATM Cell Payload VPI VCI", proto_atm, FT_UINT32, BASE_DEC); atm_reassembled_vpi_vci_table = register_dissector_table("atm.reassembled.vpi_vci", "ATM Reassembled VPI VCI", proto_atm, FT_UINT32, BASE_DEC); register_capture_dissector_table("atm.aal5.type", "ATM AAL_5"); register_capture_dissector_table("atm_lane", "ATM LAN Emulation"); atm_handle = register_dissector("atm_truncated", dissect_atm_truncated, proto_atm); register_dissector("atm_pw_truncated", dissect_atm_pw_truncated, proto_atm); atm_untruncated_handle = register_dissector("atm_untruncated", dissect_atm_untruncated, proto_atm); register_dissector("atm_pw_untruncated", dissect_atm_pw_untruncated, proto_atm); register_dissector("atm_oam_cell", dissect_atm_oam_cell, proto_oamaal); register_dissector("atm_pw_oam_cell", dissect_atm_pw_oam_cell, proto_oamaal); atm_module = prefs_register_protocol ( proto_atm, NULL ); prefs_register_bool_preference(atm_module, "dissect_lane_as_sscop", "Dissect LANE as SSCOP", "Autodetection between LANE and SSCOP is hard. As default LANE is preferred", &dissect_lanesscop); prefs_register_obsolete_preference(atm_module, "unknown_aal2_type"); register_decode_as(&atm_da); } void proto_reg_handoff_atm(void) { capture_dissector_handle_t atm_cap_handle; /* * Get handles for the Ethernet, Token Ring, Frame Relay, LLC, * SSCOP, LANE, and ILMI dissectors. */ eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_atm_lane); tr_handle = find_dissector_add_dependency("tr", proto_atm_lane); fr_handle = find_dissector_add_dependency("fr", proto_atm); llc_handle = find_dissector_add_dependency("llc", proto_atm); sscop_handle = find_dissector_add_dependency("sscop", proto_atm); ppp_handle = find_dissector_add_dependency("ppp", proto_atm); eth_maybefcs_handle = find_dissector_add_dependency("eth_maybefcs", proto_atm); ip_handle = find_dissector_add_dependency("ip", proto_atm); dissector_add_uint("wtap_encap", WTAP_ENCAP_ATM_PDUS, atm_handle); dissector_add_uint("atm.aal5.type", TRAF_LANE, create_dissector_handle(dissect_lane, proto_atm_lane)); dissector_add_uint("atm.aal5.type", TRAF_ILMI, create_dissector_handle(dissect_ilmi, proto_ilmi)); dissector_add_uint("wtap_encap", WTAP_ENCAP_ATM_PDUS_UNTRUNCATED, atm_untruncated_handle); atm_cap_handle = create_capture_dissector_handle(capture_atm, proto_atm); capture_dissector_add_uint("wtap_encap", WTAP_ENCAP_ATM_PDUS, atm_cap_handle); atm_cap_handle = create_capture_dissector_handle(capture_lane, proto_atm_lane); capture_dissector_add_uint("atm.aal5.type", TRAF_LANE, atm_cap_handle); } /* * Editor modelines - https://www.wireshark.org/tools/modelines.html * * Local Variables: * c-basic-offset: 2 * tab-width: 8 * indent-tabs-mode: nil * End: * * ex: set shiftwidth=2 tabstop=8 expandtab: * :indentSize=2:tabSize=8:noTabs=true: */