156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/* packet-atmtcp.c
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* Routines for ATM over TCP dissection
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* Copyright 2011, Alexis La Goutte <alexis.lagoutte at gmail dot com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Specification...
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* http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=blob;f=include/linux/atm_tcp.h;hb=HEAD
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* http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=blob;f=drivers/atm/atmtcp.c;hb=HEAD
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*/
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#include "config.h"
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#include <epan/packet.h>
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void proto_register_atmtcp(void);
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void proto_reg_handoff_atmtcp(void);
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static int proto_atmtcp = -1;
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static int hf_atmtcp_vpi = -1;
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static int hf_atmtcp_vci = -1;
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static int hf_atmtcp_length = -1;
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#define ATMTCP_TCP_PORT 2812
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static gint ett_atmtcp = -1;
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#define ATMTCP_HDR_MAGIC (~0) /* this length indicates a command */
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#define ATMTCP_CTRL_OPEN 1 /* request/reply */
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#define ATMTCP_CTRL_CLOSE 2 /* request/reply */
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static int
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dissect_atmtcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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proto_item *ti;
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proto_tree *atmtcp_tree;
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guint offset = 0;
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gint32 length;
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tvbuff_t *next_tvb;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ATMTCP");
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col_add_str(pinfo->cinfo, COL_INFO, "ATMTCP");
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if (tree) {
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ti = proto_tree_add_item(tree, proto_atmtcp, tvb, 0, -1, ENC_NA);
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atmtcp_tree = proto_item_add_subtree(ti, ett_atmtcp);
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/* VPI */
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proto_tree_add_item(atmtcp_tree, hf_atmtcp_vpi, tvb, offset, 2, ENC_BIG_ENDIAN);
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}
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offset += 2;
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if (tree) {
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/* VCI */
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proto_tree_add_item(atmtcp_tree, hf_atmtcp_vci, tvb, offset, 2, ENC_BIG_ENDIAN);
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}
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offset += 2;
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if (tree) {
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/* Length */
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proto_tree_add_item(atmtcp_tree, hf_atmtcp_length, tvb, offset, 4, ENC_BIG_ENDIAN);
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}
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length = tvb_get_ntohl(tvb, offset);
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if(length == ATMTCP_HDR_MAGIC)
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{
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col_append_str(pinfo->cinfo, COL_INFO, " Command");
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}
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else
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{
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col_append_str(pinfo->cinfo, COL_INFO, " Data");
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}
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offset += 4;
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/* Data (for the moment...) */
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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call_data_dissector(next_tvb, pinfo, tree);
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return tvb_reported_length(tvb);
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}
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void
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proto_register_atmtcp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_atmtcp_vpi,
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{ "VPI", "atmtcp.vpi", FT_UINT16, BASE_DEC, NULL, 0x0,
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"Virtual Path Identifier", HFILL }
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},
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{ &hf_atmtcp_vci,
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{ "VCI", "atmtcp.vci", FT_UINT16, BASE_DEC, NULL, 0x0,
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"Virtual Channel Identifier", HFILL }
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},
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{ &hf_atmtcp_length,
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{ "Length", "atmtcp.length", FT_UINT32, BASE_DEC, NULL, 0x0,
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"length of data", HFILL }
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}
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};
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static gint *ett[] = {
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&ett_atmtcp
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};
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proto_atmtcp = proto_register_protocol("ATM over TCP", "ATMTCP", "atmtcp");
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proto_register_field_array(proto_atmtcp, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_atmtcp(void)
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{
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dissector_handle_t atmtcp_handle;
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atmtcp_handle = create_dissector_handle(dissect_atmtcp, proto_atmtcp);
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dissector_add_uint_with_preference("tcp.port", ATMTCP_TCP_PORT, atmtcp_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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