epan/dissectors/packet-ascend.c

   1 /* packet-ascend.c
   2  * Routines for decoding Lucent/Ascend packet traces
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <glib.h>
  27 #include <epan/packet.h>
  28
  29 void proto_register_ascend(void);
  30 void proto_reg_handoff_acend(void);
  31
  32 static int proto_ascend  = -1;
  33 static int hf_link_type  = -1;
  34 static int hf_session_id = -1;
  35 static int hf_called_number = -1;
  36 static int hf_chunk      = -1;
  37 static int hf_task       = -1;
  38 static int hf_user_name  = -1;
  39
  40 static gint ett_raw = -1;
  41
  42 static const value_string encaps_vals[] = {
  43   {ASCEND_PFX_WDS_X, "PPP Transmit"},
  44   {ASCEND_PFX_WDS_R, "PPP Receive" },
  45   {ASCEND_PFX_WDD,   "Ethernet"    },
  46   {0,                NULL          } };
  47
  48 static dissector_handle_t eth_withoutfcs_handle;
  49 static dissector_handle_t ppp_hdlc_handle;
  50
  51 static void
  52 dissect_ascend(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  53 {
  54   proto_tree                    *fh_tree;
  55   proto_item                    *ti, *hidden_item;
  56   union wtap_pseudo_header      *pseudo_header = pinfo->pseudo_header;
  57
  58   /* load the top pane info. This should be overwritten by
  59      the next protocol in the stack */
  60   col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "N/A");
  61   col_set_str(pinfo->cinfo, COL_RES_DL_DST, "N/A");
  62   col_set_str(pinfo->cinfo, COL_PROTOCOL, "N/A");
  63   col_set_str(pinfo->cinfo, COL_INFO, "Lucent/Ascend packet trace");
  64
  65   /* If this is a transmitted or received PPP frame, set the PPP direction. */
  66   switch (pseudo_header->ascend.type) {
  67
  68   case ASCEND_PFX_WDS_X:
  69     pinfo->p2p_dir = P2P_DIR_SENT;
  70     break;
  71
  72   case ASCEND_PFX_WDS_R:
  73     pinfo->p2p_dir = P2P_DIR_RECV;
  74     break;
  75   }
  76
  77   /* populate a tree in the second pane with the status of the link
  78      layer (ie none) */
  79   if(tree) {
  80     ti = proto_tree_add_protocol_format(tree, proto_ascend, tvb, 0, 0,
  81                                         "Lucent/Ascend packet trace");
  82     fh_tree = proto_item_add_subtree(ti, ett_raw);
  83     proto_tree_add_uint(fh_tree, hf_link_type, tvb, 0, 0,
  84                         pseudo_header->ascend.type);
  85     if (pseudo_header->ascend.type == ASCEND_PFX_WDD) {
  86       proto_tree_add_string(fh_tree, hf_called_number, tvb, 0, 0,
  87                             pseudo_header->ascend.call_num);
  88       proto_tree_add_uint(fh_tree, hf_chunk, tvb, 0, 0,
  89                           pseudo_header->ascend.chunk);
  90       hidden_item = proto_tree_add_uint(fh_tree, hf_session_id, tvb, 0, 0, 0);
  91       PROTO_ITEM_SET_HIDDEN(hidden_item);
  92     } else {  /* It's wandsession data */
  93       proto_tree_add_string(fh_tree, hf_user_name, tvb, 0, 0,
  94                             pseudo_header->ascend.user);
  95       proto_tree_add_uint(fh_tree, hf_session_id, tvb, 0, 0,
  96                           pseudo_header->ascend.sess);
  97       hidden_item = proto_tree_add_uint(fh_tree, hf_chunk, tvb, 0, 0, 0);
  98       PROTO_ITEM_SET_HIDDEN(hidden_item);
  99     }
 100     proto_tree_add_uint(fh_tree, hf_task, tvb, 0, 0, pseudo_header->ascend.task);
 101   }
 102
 103   switch (pseudo_header->ascend.type) {
 104     case ASCEND_PFX_WDS_X:
 105     case ASCEND_PFX_WDS_R:
 106       call_dissector(ppp_hdlc_handle, tvb, pinfo, tree);
 107       break;
 108     case ASCEND_PFX_WDD:
 109       call_dissector(eth_withoutfcs_handle, tvb, pinfo, tree);
 110       break;
 111     default:
 112       break;
 113   }
 114 }
 115
 116 void
 117 proto_register_ascend(void)
 118 {
 119   static hf_register_info hf[] = {
 120     { &hf_link_type,
 121       { "Link type",      "ascend.type",  FT_UINT32, BASE_DEC,    VALS(encaps_vals),      0x0,
 122         NULL, HFILL }},
 123
 124     { &hf_session_id,
 125       { "Session ID",     "ascend.sess",  FT_UINT32, BASE_DEC,    NULL, 0x0,
 126         NULL, HFILL }},
 127
 128     { &hf_called_number,
 129       { "Called number",  "ascend.number", FT_STRING, BASE_NONE,  NULL, 0x0,
 130         NULL, HFILL }},
 131
 132     { &hf_chunk,
 133       { "WDD Chunk",      "ascend.chunk", FT_UINT32, BASE_HEX,    NULL, 0x0,
 134         NULL, HFILL }},
 135
 136     { &hf_task,
 137       { "Task",           "ascend.task",  FT_UINT32, BASE_HEX,    NULL, 0x0,
 138         NULL, HFILL }},
 139
 140     { &hf_user_name,
 141       { "User name",      "ascend.user",  FT_STRING, BASE_NONE,   NULL, 0x0,
 142         NULL, HFILL }},
 143   };
 144   static gint *ett[] = {
 145     &ett_raw,
 146   };
 147
 148   proto_ascend = proto_register_protocol("Lucent/Ascend debug output",
 149                                          "Lucent/Ascend", "ascend");
 150   proto_register_field_array(proto_ascend, hf, array_length(hf));
 151   proto_register_subtree_array(ett, array_length(ett));
 152 }
 153
 154 void
 155 proto_reg_handoff_ascend(void)
 156 {
 157   dissector_handle_t ascend_handle;
 158
 159   /*
 160    * Get handles for the Ethernet and PPP-in-HDLC-like-framing dissectors.
 161    */
 162   eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
 163   ppp_hdlc_handle = find_dissector("ppp_hdlc");
 164
 165   ascend_handle = create_dissector_handle(dissect_ascend, proto_ascend);
 166   dissector_add_uint("wtap_encap", WTAP_ENCAP_ASCEND, ascend_handle);
 167 }