/* packet-marker.c * Routines for Link Aggregation Marker protocol dissection. * IEEE Std 802.1AX * * Copyright 2002 Steve Housley * Copyright 2005 Dominique Bastien * * 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. */ #include "config.h" #include #include /* General declarations */ void proto_register_marker(void); void proto_reg_handoff_marker(void); /* MARKER TLVs subtype */ #define MARKERPDU_END_MARKER 0x0 #define MARKERPDU_MARKER_INFO 0x1 #define MARKERPDU_MARKER_RESPONSE 0x2 static const value_string marker_vals[] = { { MARKERPDU_MARKER_INFO, "Marker Information" }, { MARKERPDU_MARKER_RESPONSE, "Marker Response Information" }, { 0, NULL } }; /* Initialise the protocol and registered fields */ static int proto_marker = -1; static int hf_marker_version_number = -1; static int hf_marker_tlv_type = -1; static int hf_marker_tlv_length = -1; static int hf_marker_req_port = -1; static int hf_marker_req_system = -1; static int hf_marker_req_trans_id = -1; /* Initialise the subtree pointers */ static gint ett_marker = -1; /* * Name: dissect_marker * * Description: * This function is used to dissect the Link Aggregation Marker Protocol * slow protocols defined in IEEE802.3 clause 43.5 (The PDUs are defined * in section 43.5.3.2). The TLV types are 0x01 for a marker TLV and 0x02 * for a marker response. A value of 0x00 indicates an end of message. * * Input Arguments: * tvb: buffer associated with the rcv packet (see tvbuff.h). * pinfo: structure associated with the rcv packet (see packet_info.h). * tree: the protocol tree associated with the rcv packet (see proto.h). * * Return Values: None * * Notes: * Dominique Bastien (dbastien@accedian.com) * + add support for MARKER and MARKER Response PDUs. */ static int dissect_marker(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { int offset = 0; guint8 raw_octet; proto_tree *marker_tree; proto_item *marker_item; col_set_str(pinfo->cinfo, COL_PROTOCOL, "Marker"); col_set_str(pinfo->cinfo, COL_INFO, "Marker Protocol"); if (tree) { marker_item = proto_tree_add_protocol_format(tree, proto_marker, tvb, 0, -1, "Marker Protocol"); marker_tree = proto_item_add_subtree(marker_item, ett_marker); /* Version Number */ proto_tree_add_item(marker_tree, hf_marker_version_number, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; while (1) { /* TLV Type */ raw_octet = tvb_get_guint8(tvb, offset); if (raw_octet == MARKERPDU_END_MARKER) break; proto_tree_add_uint(marker_tree, hf_marker_tlv_type, tvb, offset, 1, raw_octet); offset += 1; /* TLV Length */ proto_tree_add_item(marker_tree, hf_marker_tlv_length, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; /* Requester Port */ proto_tree_add_item(marker_tree, hf_marker_req_port, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; /* Requester System */ proto_tree_add_item(marker_tree, hf_marker_req_system, tvb, offset, 6, ENC_NA); offset += 6; /* Requester Transaction ID */ proto_tree_add_item(marker_tree, hf_marker_req_trans_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; /* Pad to align */ offset += 2; } } return tvb_captured_length(tvb); } /* Register the protocol with Wireshark */ void proto_register_marker(void) { /* Setup list of header fields */ static hf_register_info hf[] = { { &hf_marker_version_number, { "Version Number", "marker.version", FT_UINT8, BASE_HEX, NULL, 0x0, "Marker protocol version", HFILL }}, { &hf_marker_tlv_type, { "TLV Type", "marker.tlvType", FT_UINT8, BASE_HEX, VALS(marker_vals), 0x0, NULL, HFILL }}, { &hf_marker_tlv_length, { "TLV Length", "marker.tlvLen", FT_UINT8, BASE_HEX, NULL, 0x0, "Length of the Actor TLV", HFILL }}, { &hf_marker_req_port, { "Requester Port", "marker.requesterPort", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_marker_req_system, { "Requester System", "marker.requesterSystem", FT_ETHER, BASE_NONE, NULL, 0x0, "Requester System ID encoded as a MAC address", HFILL }}, { &hf_marker_req_trans_id, { "Requester Transaction ID", "marker.requesterTransId", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_marker, }; /* Register the protocol name and description */ proto_marker = proto_register_protocol("Marker", "Link Aggregation Marker Protocol", "marker"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_marker, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void proto_reg_handoff_marker(void) { dissector_handle_t marker_handle; marker_handle = create_dissector_handle(dissect_marker, proto_marker); dissector_add_uint("slow.subtype", MARKER_SUBTYPE, marker_handle); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * vi: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */