epan/dissectors/packet-tpkt.h

   1 /* packet-tpkt.h
   2  *
   3  * Routines for TPKT dissection
   4  *
   5  * Copyright 2000, Philips Electronics N.V.
   6  * Andreas Sikkema <andreas.sikkema@philips.com>
   7  *
   8  * $Id$
   9  *
  10  * Wireshark - Network traffic analyzer
  11  * By Gerald Combs <gerald@wireshark.org>
  12  * Copyright 1998 Gerald Combs
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  27  */
  28
  29 #include "ws_symbol_export.h"
  30
  31 /*
  32  * Check whether this could be a TPKT-encapsulated PDU.
  33  * Returns -1 if it's not, and the PDU length from the TPKT header
  34  * if it is.
  35  *
  36  * "min_len" is the minimum length of the PDU; the length field in the
  37  * TPKT header must be at least "4+min_len" in order for this to be a
  38  * valid TPKT PDU for the protocol in question.
  39  */
  40 static const int TEXT_LAYER_LENGTH   = 9;
  41
  42 WS_DLL_PUBLIC int is_tpkt(tvbuff_t *tvb, int min_len);
  43
  44 /*
  45  * Dissect TPKT-encapsulated data in a TCP stream.
  46  */
  47 WS_DLL_PUBLIC void dissect_tpkt_encap(tvbuff_t *tvb, packet_info *pinfo,
  48     proto_tree *tree, gboolean desegment,
  49     dissector_handle_t subdissector_handle);
  50
  51
  52 /*
  53  * Check whether this could be a ASCII TPKT-encapsulated PDU.
  54  * Returns -1 if it's not, and the PDU length from the TPKT header
  55  * if it is.
  56  *
  57  * "min_len" is the minimum length of the PDU; the length field in the
  58  * TPKT header must be at least "8+min_len" in order for this to be a
  59  * valid TPKT PDU for the protocol in question.
  60  */
  61
  62 extern guint16 is_asciitpkt(tvbuff_t *tvb);
  63
  64 /*
  65  * Dissect ASCII TPKT-encapsulated data in a TCP stream.
  66  */
  67 extern void dissect_asciitpkt(tvbuff_t *tvb, packet_info *pinfo,
  68     proto_tree *tree, dissector_handle_t subdissector_handle);
  69