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packet-smrse-template.c

/* packet-smrse.c
 * Routines for SMRSE Short Message Relay Service packet dissection
 *   Ronnie Sahlberg 2004
 *
 * $Id: packet-smrse-template.c 29826 2009-09-09 19:15:24Z gerald $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <glib.h>
#include <epan/packet.h>
#include <epan/asn1.h>

#include <stdio.h>
#include <string.h>

#include "packet-ber.h"
#include "packet-smrse.h"

#define PNAME  "Short Message Relaying Service"
#define PSNAME "SMRSE"
#define PFNAME "smrse"

#define TCP_PORT_SMRSE 4321

/* Initialize the protocol and registered fields */
int proto_smrse = -1;
static int hf_smrse_reserved = -1;
static int hf_smrse_tag = -1;
static int hf_smrse_length = -1;
static int hf_smrse_Octet_Format = -1;
#include "packet-smrse-hf.c"

/* Initialize the subtree pointers */
static gint ett_smrse = -1;
#include "packet-smrse-ett.c"


#include "packet-smrse-fn.c"

static const value_string tag_vals[] = {
      {  1, "AliveTest" },
      {  2, "AliveTestRsp" },
      {  3, "Bind" },
      {  4, "BindRsp" },
      {  5, "BindFail" },
      {  6, "Unbind" },
      {  7, "MT" },
      {  8, "MO" },
      {  9, "Ack" },
      { 10, "Error" },
      { 11, "Alert" },
      { 0, NULL }
};

static int
dissect_smrse(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
{
      proto_item *item = NULL;
      proto_tree *tree = NULL;
      guint8 reserved, tag;
      guint16 length;
      int offset=0;
      asn1_ctx_t asn1_ctx;
      asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);

      reserved=tvb_get_guint8(tvb, 0);
      length=tvb_get_ntohs(tvb,1);
      tag=tvb_get_guint8(tvb, 3);

      if( reserved!= 126 )
            return 0;
      if( (tag<1)||(tag>11) )
            return 0;

      if(parent_tree){
            item = proto_tree_add_item(parent_tree, proto_smrse, tvb, 0, -1, FALSE);
            tree = proto_item_add_subtree(item, ett_smrse);
      }

      col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMRSE");
      if (check_col(pinfo->cinfo, COL_INFO))
            col_add_str(pinfo->cinfo, COL_INFO, val_to_str(tag, tag_vals,"Unknown Tag:0x%02x"));

      proto_tree_add_item(tree, hf_smrse_reserved, tvb, 0, 1, FALSE);
      proto_tree_add_item(tree, hf_smrse_length, tvb, 1, 2, FALSE);
      proto_tree_add_item(tree, hf_smrse_tag, tvb, 3, 1, FALSE);

      switch(tag){
      case 1:
      case 2:
            offset=4;
            break;
      case 3:
            offset=dissect_smrse_SMR_Bind(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 4:
            offset=dissect_smrse_SMR_Bind_Confirm(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 5:
            offset=dissect_smrse_SMR_Bind_Failure(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 6:
            offset=dissect_smrse_SMR_Unbind(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 7:
            offset=dissect_smrse_RPDataMT(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 8:
            offset=dissect_smrse_RPDataMO(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 9:
            offset=dissect_smrse_RPAck(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 10:
            offset=dissect_smrse_RPError(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      case 11:
            offset=dissect_smrse_RPAlertSC(FALSE, tvb, 4, &asn1_ctx, tree, -1);
            break;
      }

      return offset;
}

/*--- proto_register_smrse ----------------------------------------------*/
void proto_register_smrse(void) {

  /* List of fields */
  static hf_register_info hf[] = {
      { &hf_smrse_reserved, {
            "Reserved", "smrse.reserved", FT_UINT8, BASE_DEC,
            NULL, 0, "Reserved byte, must be 126", HFILL }},
      { &hf_smrse_tag, {
            "Tag", "smrse.tag", FT_UINT8, BASE_DEC,
            VALS(tag_vals), 0, "Tag", HFILL }},
      { &hf_smrse_length, {
            "Length", "smrse.length", FT_UINT16, BASE_DEC,
            NULL, 0, "Length of SMRSE PDU", HFILL }},
    { &hf_smrse_Octet_Format,
      { "octet-Format", "smrse.octet_Format",
        FT_STRING, BASE_HEX, NULL, 0,
        "SMS-Address/address-value/octet-format", HFILL }},

#include "packet-smrse-hfarr.c"
  };

  /* List of subtrees */
  static gint *ett[] = {
    &ett_smrse,
#include "packet-smrse-ettarr.c"
  };

  /* Register protocol */
  proto_smrse = proto_register_protocol(PNAME, PSNAME, PFNAME);

  /* Register fields and subtrees */
  proto_register_field_array(proto_smrse, hf, array_length(hf));
  proto_register_subtree_array(ett, array_length(ett));

}


/*--- proto_reg_handoff_smrse -------------------------------------------*/
void proto_reg_handoff_smrse(void) {
  dissector_handle_t smrse_handle;

  smrse_handle = new_create_dissector_handle(dissect_smrse, proto_smrse);
  dissector_add("tcp.port",TCP_PORT_SMRSE, smrse_handle);
}


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