/* packet-lge_monitor.c

 * Routines for LGE Monitor packet dissection

 * Copyright 2006, Anders Broman <anders.broman[at]ericsson.com>

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 *

 * LGE Monitor is a trace tool from Nortel.

 */

#include "config.h"

#include <epan/packet.h>

void proto_reg_handoff_lge_monitor(void);

void proto_register_lge_monitor(void);

static dissector_handle_t lge_monitor_handle;

/* Initialize the protocol and registered fields */

static int proto_lge_monitor;

static int hf_lge_monitor_dir;

static int hf_lge_monitor_prot;

static int hf_lge_monitor_length;

static int hf_lge_monitor_data;

/* Initialize the subtree pointers */

static int ett_lge_monitor;

static int ett_lge_header;

static dissector_handle_t mtp3_handle, m3ua_handle, sccp_handle, sctp_handle;

static const value_string lge_monitor_dir_vals[] = {

  { 0x00, "TX(Transmit Message Signaling Unit)" },

  { 0x01, "RX(Receive Message Signaling Unit)" },

  { 0,  NULL }

};

static const value_string lge_monitor_prot_vals[] = {

  { 0x00, "MTP-3(Message Transfer Part 3)" },

  { 0x01, "SCCP(Signaling Connection Control Part)"},

  { 0x02, "SCTP(Stream Control Transmission Protocol)"},

  { 0x03, "M3UA(MTP-3 User Adaptation)"},

  { 0,  NULL }

};

#define LGEMON_PROTO_HEADER_LENGTH 12

/* Code to actually dissect the packets */

static int

dissect_lge_monitor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)

{

  unsigned offset = 0;

  uint32_t lge_monitor_proto_id;

  tvbuff_t* next_tvb = NULL;

  proto_tree* header_tree;

/* Set up structures needed to add the protocol subtree and manage it */

  proto_item *ti;

  proto_tree *lge_monitor_tree;

/* Make entries in Protocol column and Info column on summary display */

  col_set_str(pinfo->cinfo, COL_PROTOCOL, "LGE Monitor");

  ti = proto_tree_add_item(tree, proto_lge_monitor, tvb, 0, LGEMON_PROTO_HEADER_LENGTH, ENC_NA);

  lge_monitor_tree = proto_item_add_subtree(ti, ett_lge_monitor);

  header_tree = proto_tree_add_subtree(lge_monitor_tree, tvb, offset, LGEMON_PROTO_HEADER_LENGTH, ett_lge_header, NULL, "LGE Monitor PDU");

  proto_tree_add_item(header_tree, hf_lge_monitor_dir, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  lge_monitor_proto_id = tvb_get_ntohl(tvb,offset);

  proto_tree_add_item(header_tree, hf_lge_monitor_prot, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  proto_tree_add_item(header_tree, hf_lge_monitor_length, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  next_tvb = tvb_new_subset_remaining(tvb, offset);

  switch (lge_monitor_proto_id){

  case 0: /* MTP3 */

    call_dissector(mtp3_handle, next_tvb, pinfo, tree);

    break;

  case 1: /* SCCP */

    call_dissector(sccp_handle, next_tvb, pinfo, tree);

    break;

  case 2: /* SCTP */

    call_dissector(sctp_handle, next_tvb, pinfo, tree);

    break;

  case 3: /* M3UA */

    call_dissector(m3ua_handle, next_tvb, pinfo, tree);

    break;

  default:

    proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_data, tvb, offset, -1, ENC_NA);

    break;

  }

  return tvb_captured_length(tvb);

}

void

proto_reg_handoff_lge_monitor(void)

{

  dissector_add_for_decode_as_with_preference("udp.port", lge_monitor_handle);

  mtp3_handle  = find_dissector_add_dependency("mtp3", proto_lge_monitor);

  m3ua_handle  = find_dissector_add_dependency("m3ua", proto_lge_monitor);

  sccp_handle  = find_dissector_add_dependency("sccp", proto_lge_monitor);

  sctp_handle  = find_dissector_add_dependency("sctp", proto_lge_monitor);

}

void

proto_register_lge_monitor(void)

{

/* Setup list of header fields  */

  static hf_register_info hf[] = {

    { &hf_lge_monitor_dir,

      { "Direction",           "lge_monitor.dir",

      FT_UINT32, BASE_DEC, VALS(lge_monitor_dir_vals), 0x0,

      NULL, HFILL }

    },

    { &hf_lge_monitor_prot,

      { "Protocol Identifier",           "lge_monitor.prot",

      FT_UINT32, BASE_DEC, VALS(lge_monitor_prot_vals), 0x0,

      NULL, HFILL }

    },

    { &hf_lge_monitor_length,

      { "Payload Length",           "lge_monitor.length",

      FT_UINT32, BASE_DEC, NULL, 0x0,

      NULL, HFILL }

    },

    { &hf_lge_monitor_data,

      { "LGE Monitor data",           "lge_monitor.monitor_data",

      FT_BYTES, BASE_NONE, NULL, 0x0,

      NULL, HFILL }

    },

  };

/* Setup protocol subtree array */

  static int *ett[] = {

    &ett_lge_monitor,

    &ett_lge_header

  };

/* Register the protocol name and description */

  proto_lge_monitor = proto_register_protocol("LGE Monitor","LGE_Monitor", "lge_monitor");

/* Required function calls to register the header fields and subtrees used */

  proto_register_field_array(proto_lge_monitor, hf, array_length(hf));

  proto_register_subtree_array(ett, array_length(ett));

/* Register the dissector */

  lge_monitor_handle = register_dissector("lge_monitor", dissect_lge_monitor, proto_lge_monitor);

}

/*

 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html

 *

 * Local variables:

 * c-basic-offset: 8

 * tab-width: 8

 * indent-tabs-mode: t

 * End:

 *

 * vi: set shiftwidth=8 tabstop=8 noexpandtab:

 * :indentSize=8:tabSize=8:noTabs=false:

 */