epan/dissectors/packet-cosine.c

   1 /* packet-cosine.c
   2  * Routines for decoding CoSine IPNOS L2 debug output
   3  *
   4  * $Id$
   5  *
   6  * Motonori Shindo <motonori@shin.do>
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 /*
  27  * XXX TODO:
  28  *    o PPoATM and PPoFR encapsulation needs more test.
  29  *
  30  */
  31
  32 #include "config.h"
  33
  34 #include <glib.h>
  35 #include <epan/packet.h>
  36
  37 void proto_register_cosine(void);
  38 void proto_reg_handoff_cosine(void);
  39
  40 static int proto_cosine = -1;
  41 static int hf_pro = -1;
  42 static int hf_off = -1;
  43 static int hf_pri = -1;
  44 static int hf_rm = -1;
  45 static int hf_err = -1;
  46
  47 static gint ett_raw = -1;
  48
  49 static dissector_handle_t eth_withoutfcs_handle;
  50 static dissector_handle_t ppp_hdlc_handle;
  51 static dissector_handle_t llc_handle;
  52 static dissector_handle_t chdlc_handle;
  53 static dissector_handle_t fr_handle;
  54 static dissector_handle_t data_handle;
  55
  56 static void
  57 dissect_cosine(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  58 {
  59   proto_tree               *fh_tree;
  60   proto_item               *ti;
  61   union wtap_pseudo_header *pseudo_header = pinfo->pseudo_header;
  62
  63   /* load the top pane info. This should be overwritten by
  64      the next protocol in the stack */
  65   col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "N/A");
  66   col_set_str(pinfo->cinfo, COL_RES_DL_DST, "N/A");
  67   col_set_str(pinfo->cinfo, COL_PROTOCOL, "N/A");
  68   col_set_str(pinfo->cinfo, COL_INFO, "CoSine IPNOS L2 debug output");
  69
  70   /* populate a tree in the second pane with the status of the link
  71      layer (ie none) */
  72   if(tree) {
  73     ti = proto_tree_add_protocol_format(tree, proto_cosine, tvb, 0, 0,
  74                                         "CoSine IPNOS L2 debug output (%s)",
  75                                         pseudo_header->cosine.if_name);
  76     fh_tree = proto_item_add_subtree(ti, ett_raw);
  77     proto_tree_add_uint(fh_tree, hf_pro, tvb, 0, 0, pseudo_header->cosine.pro);
  78     proto_tree_add_uint(fh_tree, hf_off, tvb, 0, 0, pseudo_header->cosine.off);
  79     proto_tree_add_uint(fh_tree, hf_pri, tvb, 0, 0, pseudo_header->cosine.pri);
  80     proto_tree_add_uint(fh_tree, hf_rm,  tvb, 0, 0, pseudo_header->cosine.rm);
  81     proto_tree_add_uint(fh_tree, hf_err, tvb, 0, 0, pseudo_header->cosine.err);
  82
  83     switch (pseudo_header->cosine.encap) {
  84       case COSINE_ENCAP_ETH:
  85         break;
  86       case COSINE_ENCAP_ATM:
  87       case COSINE_ENCAP_PPoATM:
  88         proto_tree_add_text(fh_tree, tvb, 0, 16, "SAR header");
  89         break;
  90       case COSINE_ENCAP_PPP:
  91       case COSINE_ENCAP_FR:
  92       case COSINE_ENCAP_PPoFR:
  93         proto_tree_add_text(fh_tree, tvb, 0, 4, "Channel handle ID");
  94         break;
  95       case COSINE_ENCAP_HDLC:
  96         if (pseudo_header->cosine.direction == COSINE_DIR_TX) {
  97           proto_tree_add_text(fh_tree, tvb, 0, 2,
  98                               "Channel handle ID");
  99         } else if (pseudo_header->cosine.direction == COSINE_DIR_RX) {
 100           proto_tree_add_text(fh_tree, tvb, 0, 4,
 101                               "Channel handle ID");
 102         }
 103         break;
 104       default:
 105         break;
 106     }
 107   }
 108
 109   switch (pseudo_header->cosine.encap) {
 110     case COSINE_ENCAP_ETH:
 111       call_dissector(eth_withoutfcs_handle, tvb_new_subset_remaining(tvb, 0),
 112                      pinfo, tree);
 113       break;
 114     case COSINE_ENCAP_ATM:
 115     case COSINE_ENCAP_PPoATM:
 116       call_dissector(llc_handle, tvb_new_subset_remaining(tvb, 16),
 117                      pinfo, tree);
 118       break;
 119     case COSINE_ENCAP_PPP:
 120       call_dissector(ppp_hdlc_handle, tvb_new_subset_remaining(tvb, 4),
 121                      pinfo, tree);
 122       break;
 123     case COSINE_ENCAP_HDLC:
 124       if (pseudo_header->cosine.direction == COSINE_DIR_TX) {
 125         call_dissector(chdlc_handle, tvb_new_subset_remaining(tvb, 2),
 126                        pinfo, tree);
 127       } else if (pseudo_header->cosine.direction == COSINE_DIR_RX) {
 128         call_dissector(chdlc_handle, tvb_new_subset_remaining(tvb, 4),
 129                        pinfo, tree);
 130       }
 131       break;
 132     case COSINE_ENCAP_FR:
 133     case COSINE_ENCAP_PPoFR:
 134       call_dissector(fr_handle, tvb_new_subset_remaining(tvb, 4),
 135                      pinfo, tree);
 136       break;
 137     case COSINE_ENCAP_TEST:
 138     case COSINE_ENCAP_UNKNOWN:
 139       call_dissector(data_handle, tvb, pinfo, tree);
 140       break;
 141     default:
 142       break;
 143   }
 144 }
 145
 146 void
 147 proto_register_cosine(void)
 148 {
 149   static hf_register_info hf[] = {
 150     { &hf_pro,
 151       { "Protocol", "cosine.pro", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
 152     { &hf_off,
 153       { "Offset", "cosine.off", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
 154     { &hf_pri,
 155       { "Priority", "cosine.pri", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
 156     { &hf_rm,
 157       { "Rate Marking", "cosine.rm",  FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
 158     { &hf_err,
 159       { "Error Code", "cosine.err", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL}},
 160   };
 161
 162   static gint *ett[] = {
 163     &ett_raw,
 164   };
 165
 166   proto_cosine = proto_register_protocol("CoSine IPNOS L2 debug output",
 167                                          "CoSine", "cosine");
 168   proto_register_field_array(proto_cosine, hf, array_length(hf));
 169   proto_register_subtree_array(ett, array_length(ett));
 170 }
 171
 172 void
 173 proto_reg_handoff_cosine(void)
 174 {
 175   dissector_handle_t cosine_handle;
 176
 177   /*
 178    * Get handles for dissectors.
 179    */
 180   eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
 181   ppp_hdlc_handle       = find_dissector("ppp_hdlc");
 182   llc_handle            = find_dissector("llc");
 183   chdlc_handle          = find_dissector("chdlc");
 184   fr_handle             = find_dissector("fr");
 185   data_handle           = find_dissector("data");
 186
 187   cosine_handle = create_dissector_handle(dissect_cosine, proto_cosine);
 188   dissector_add_uint("wtap_encap", WTAP_ENCAP_COSINE, cosine_handle);
 189 }