/* packet-maap.c * Routines for 802.3 MAC Address Allocation Protocol defined by IEEE1722 * Copyright 2012, Jason Damori, Biamp Systems * * 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 void proto_register_maap(void); void proto_reg_handoff_maap(void); /* MAAP starts after common 1722 header */ #define MAAP_START_OFFSET 1 /* MAAP Field Offsets */ #define MAAP_MSG_TYPE_OFFSET 0+MAAP_START_OFFSET #define MAAP_VERSION_OFFSET 1+MAAP_START_OFFSET #define MAAP_STREAM_ID_OFFSET 3+MAAP_START_OFFSET #define MAAP_REQ_START_ADDR_OFFSET 11+MAAP_START_OFFSET #define MAAP_REQ_COUNT_OFFSET 17+MAAP_START_OFFSET #define MAAP_CONFLICT_START_ADDR_OFFSET 19+MAAP_START_OFFSET #define MAAP_CONFLICT_COUNT_OFFSET 25+MAAP_START_OFFSET /* Bit Field Masks */ #define MAAP_MSG_TYPE_MASK 0x0f #define MAAP_VERSION_MASK 0xf8 #define MAAP_DATA_LEN_MASK 0x07ff /* MAAP message_type */ #define MAAP_MSG_TYPE_RESERVED_0 0x00 #define MAAP_MSG_TYPE_PROBE 0x01 #define MAAP_MSG_TYPE_DEFEND 0x02 #define MAAP_MSG_TYPE_ANNOUNCE 0x03 #define MAAP_MSG_TYPE_RESERVED_4 0x04 #define MAAP_MSG_TYPE_RESERVED_5 0x05 static const value_string maap_msg_type_vals [] = { {MAAP_MSG_TYPE_PROBE, "MAAP_PROBE"}, {MAAP_MSG_TYPE_DEFEND, "MAAP_DEFEND"}, {MAAP_MSG_TYPE_ANNOUNCE, "MAAP_ANNOUNCE"}, {0, NULL} }; /**********************************************************/ /* Initialize the protocol and registered fields */ /**********************************************************/ static int proto_maap = -1; /* MAAP PDU */ static int hf_maap_message_type = -1; static int hf_maap_version = -1; static int hf_maap_data_length = -1; static int hf_maap_stream_id = -1; static int hf_maap_req_start_addr = -1; static int hf_maap_req_count = -1; static int hf_maap_conflict_start_addr = -1; static int hf_maap_conflict_count = -1; /* Initialize the subtree pointers */ static int ett_maap = -1; static int dissect_maap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { guint8 maap_msg_type; proto_item *maap_item = NULL; proto_tree *maap_tree = NULL; col_set_str(pinfo->cinfo, COL_PROTOCOL, "MAAP"); col_clear(pinfo->cinfo, COL_INFO); /* The maap msg type will be handy in a moment */ maap_msg_type = tvb_get_guint8(tvb, MAAP_MSG_TYPE_OFFSET); maap_msg_type &= 0x0f; /* Display the name of the packet type in the info column. */ col_add_fstr(pinfo->cinfo, COL_INFO, "%s:", val_to_str(maap_msg_type, maap_msg_type_vals, "Unknown Type(0x%02x)")); /* Now, we'll add the start and conflict addresses and counts to the info column as appropriate */ switch (maap_msg_type) { case MAAP_MSG_TYPE_PROBE: case MAAP_MSG_TYPE_ANNOUNCE: col_append_fstr(pinfo->cinfo, COL_INFO, " req_start=%s, cnt=%d", tvb_ether_to_str(tvb, MAAP_REQ_START_ADDR_OFFSET), tvb_get_ntohs(tvb, MAAP_REQ_COUNT_OFFSET)); break; case MAAP_MSG_TYPE_DEFEND: col_append_fstr(pinfo->cinfo, COL_INFO, " conflict_start=%s, cnt=%d", tvb_ether_to_str(tvb, MAAP_CONFLICT_START_ADDR_OFFSET), tvb_get_ntohs(tvb, MAAP_CONFLICT_COUNT_OFFSET)); break; default: /* no info for reserved or unknown msg types */ break; } if (tree) { maap_item = proto_tree_add_item(tree, proto_maap, tvb, MAAP_START_OFFSET, -1, ENC_NA); maap_tree = proto_item_add_subtree(maap_item, ett_maap); proto_tree_add_item(maap_tree, hf_maap_message_type, tvb, MAAP_MSG_TYPE_OFFSET, 1, ENC_BIG_ENDIAN); proto_tree_add_item(maap_tree, hf_maap_version, tvb, MAAP_VERSION_OFFSET, 1, ENC_BIG_ENDIAN); proto_tree_add_item(maap_tree, hf_maap_data_length, tvb, MAAP_VERSION_OFFSET, 2, ENC_BIG_ENDIAN); proto_tree_add_item(maap_tree, hf_maap_stream_id, tvb, MAAP_STREAM_ID_OFFSET, 8, ENC_BIG_ENDIAN); proto_tree_add_item(maap_tree, hf_maap_req_start_addr, tvb, MAAP_REQ_START_ADDR_OFFSET, 6, ENC_NA); proto_tree_add_item(maap_tree, hf_maap_req_count, tvb, MAAP_REQ_COUNT_OFFSET, 2, ENC_BIG_ENDIAN); proto_tree_add_item(maap_tree, hf_maap_conflict_start_addr, tvb, MAAP_CONFLICT_START_ADDR_OFFSET, 6, ENC_NA); proto_tree_add_item(maap_tree, hf_maap_conflict_count, tvb, MAAP_CONFLICT_COUNT_OFFSET, 2, ENC_BIG_ENDIAN); } return tvb_captured_length(tvb); } /* end dissect_maap() */ /* Register the protocol with Wireshark */ void proto_register_maap(void) { static hf_register_info hf[] = { { &hf_maap_message_type, { "Message Type", "maap.message_type", FT_UINT8, BASE_HEX, VALS(maap_msg_type_vals), MAAP_MSG_TYPE_MASK, NULL, HFILL }}, { &hf_maap_version, { "MAAP Version", "maap.version", FT_UINT8, BASE_HEX, NULL, MAAP_VERSION_MASK, NULL, HFILL }}, { &hf_maap_data_length, { "Data Length", "maap.data_length", FT_UINT16, BASE_HEX, NULL, MAAP_DATA_LEN_MASK, NULL, HFILL }}, { &hf_maap_stream_id, { "Stream ID", "maap.stream_id", FT_UINT64, BASE_HEX, NULL, 0x00, NULL, HFILL }}, { &hf_maap_req_start_addr, { "Requested Start Address", "maap.req_start_addr", FT_ETHER, BASE_NONE, NULL, 0x00, NULL, HFILL }}, { &hf_maap_req_count, { "Request Count", "maap.req_count", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL }}, { &hf_maap_conflict_start_addr, { "Conflict Start Address", "maap.conflict_start_addr", FT_ETHER, BASE_NONE, NULL, 0x00, NULL, HFILL }}, { &hf_maap_conflict_count, { "Conflict Count", "maap.conflict_count", FT_UINT16, BASE_HEX, NULL, 0x00, NULL, HFILL }} }; /* end of static hf_register_info hf[] = */ /* Setup protocol subtree array */ static gint *ett[] = { &ett_maap }; /* Register the protocol name and description */ proto_maap = proto_register_protocol ( "IEEE 1722 MAAP Protocol", /* name */ "MAAP", /* short name */ "maap" /* abbrev */ ); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_maap, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } /* end proto_register_maap() */ void proto_reg_handoff_maap(void) { dissector_handle_t maap_handle; maap_handle = create_dissector_handle(dissect_maap, proto_maap); dissector_add_uint("ieee1722.subtype", 0x7E, maap_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: */