epan/dissectors/packet-ipsi-ctl.c

   1 /* packet-ipsi-ctl.c
   2  * Routines for Avaya IPSI Control packet disassembly
   3  * Traffic is encapsulated Avaya proprietary CCMS
   4  * (Control Channel Message Set) between PCD and SIM
   5  *
   6  * Copyright 2008, Randy McEoin <rmceoin@ahbelo.com>
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <epan/packet.h>
  30
  31 void proto_register_ipsictl(void);
  32 void proto_reg_handoff_ipsictl(void);
  33
  34 #define IPSICTL_PORT            5010
  35 #define IPSICTL_PDU_MAGIC       0x0300
  36
  37 static int proto_ipsictl = -1;
  38
  39 static int hf_ipsictl_pdu = -1;
  40 static int hf_ipsictl_magic = -1;
  41 static int hf_ipsictl_length = -1;
  42 static int hf_ipsictl_type = -1;
  43 static int hf_ipsictl_sequence = -1;
  44 static int hf_ipsictl_field1 = -1;
  45 static int hf_ipsictl_data = -1;
  46
  47 static gint ett_ipsictl = -1;
  48 static gint ett_ipsictl_pdu = -1;
  49
  50 static void dissect_ipsictl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  51 {
  52
  53   proto_tree   *ipsictl_tree;
  54   proto_tree   *pdu_tree;
  55   proto_item   *ti;
  56   int           offset = 0;
  57   int           loffset = 0;
  58   int           llength = 0;
  59   int           remaining_length;
  60   guint16       magic;
  61   guint16       length;
  62   guint16       type=0;
  63   guint16       sequence=0;
  64   int           first_sequence=-1;
  65   int           last_sequence=-1;
  66   guint16       field1=0;
  67   guint16       pdu=0;
  68   int           haspdus=0;
  69
  70   remaining_length=tvb_reported_length_remaining(tvb, offset);
  71
  72   ti = proto_tree_add_item(tree, proto_ipsictl, tvb, offset, remaining_length, ENC_NA);
  73   ipsictl_tree = proto_item_add_subtree(ti, ett_ipsictl);
  74
  75   magic = tvb_get_ntohs(tvb, offset);
  76   if (magic == IPSICTL_PDU_MAGIC)
  77   {
  78     haspdus=1;
  79   }
  80
  81   while (haspdus &&
  82     ((remaining_length=tvb_reported_length_remaining(tvb, offset)) > 6))
  83   {
  84     loffset = offset;
  85
  86     magic = tvb_get_ntohs(tvb, loffset); loffset+=2;
  87     length = tvb_get_ntohs(tvb, loffset); loffset+=2;
  88     llength=length;
  89     remaining_length-=4;
  90     if (remaining_length>=2)
  91     {
  92       type = tvb_get_ntohs(tvb, loffset); loffset+=2;
  93       remaining_length-=2;
  94       llength-=2;
  95     }
  96     if (remaining_length>=2)
  97     {
  98       sequence = tvb_get_ntohs(tvb, loffset); loffset+=2;
  99       remaining_length-=2;
 100       llength-=2;
 101       if (first_sequence==-1)
 102       {
 103         first_sequence=sequence;
 104       }else{
 105         last_sequence=sequence;
 106       }
 107     }
 108     if (remaining_length>=2)
 109     {
 110       field1 = tvb_get_ntohs(tvb, loffset);
 111       llength-=2;
 112     }
 113
 114     ti = proto_tree_add_uint(ipsictl_tree, hf_ipsictl_pdu, tvb,
 115            offset, (length+4), pdu);
 116     pdu_tree = proto_item_add_subtree(ti, ett_ipsictl_pdu);
 117
 118     loffset=offset;
 119     remaining_length=tvb_reported_length_remaining(tvb, offset);
 120
 121     if (tree) {
 122       proto_tree_add_uint(pdu_tree, hf_ipsictl_magic, tvb, loffset, 2, magic);
 123     }
 124     loffset+=2; remaining_length-=2;
 125     if (tree) {
 126       proto_tree_add_uint(pdu_tree, hf_ipsictl_length, tvb, loffset, 2, length);
 127     }
 128     loffset+=2; remaining_length-=2;
 129
 130     if (remaining_length>=2)
 131     {
 132       if (tree) {
 133         proto_tree_add_uint(pdu_tree, hf_ipsictl_type, tvb, loffset, 2, type);
 134       }
 135       loffset+=2; remaining_length-=2;
 136     }
 137     if (remaining_length>=2)
 138     {
 139       if (tree) {
 140         proto_tree_add_uint(pdu_tree, hf_ipsictl_sequence, tvb, loffset, 2, sequence);
 141       }
 142       loffset+=2; remaining_length-=2;
 143     }
 144     if (remaining_length>=2)
 145     {
 146       if (tree) {
 147         proto_tree_add_uint(pdu_tree, hf_ipsictl_field1, tvb, loffset, 2, field1);
 148       }
 149       loffset+=2; remaining_length-=2;
 150     }
 151     if (remaining_length>=2)
 152     {
 153       if (tree) {
 154         proto_tree_add_item(pdu_tree, hf_ipsictl_data, tvb, loffset, llength, ENC_NA);
 155       }
 156       loffset+=llength;
 157     }
 158
 159     offset=loffset;
 160     pdu++;
 161   }
 162
 163   if (!haspdus)
 164   {
 165     if (tree) {
 166       proto_tree_add_item(ipsictl_tree, hf_ipsictl_data, tvb, offset, -1, ENC_NA);
 167     }
 168   }
 169
 170   col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPSICTL");
 171
 172   if (haspdus)
 173   {
 174     if (last_sequence==-1)
 175     {
 176       col_add_fstr(pinfo->cinfo, COL_INFO, "PDUS=%d, Seq=0x%04x",
 177         pdu,first_sequence);
 178     }else{
 179       col_add_fstr(pinfo->cinfo, COL_INFO, "PDUS=%d, Seq=0x%04x-0x%04x",
 180         pdu,first_sequence,last_sequence);
 181     }
 182   }else{
 183     col_set_str(pinfo->cinfo, COL_INFO, "Initialization");
 184   }
 185
 186
 187 } /* dissect_ipsictl */
 188
 189 void proto_register_ipsictl(void)
 190 {
 191
 192   static hf_register_info hf[] = {
 193     { &hf_ipsictl_pdu,
 194       { "PDU",  "ipsictl.pdu",
 195         FT_UINT16,      BASE_DEC,       NULL,   0x0,
 196         "IPSICTL PDU", HFILL }},
 197     { &hf_ipsictl_magic,
 198       { "Magic",        "ipsictl.magic",
 199         FT_UINT16,      BASE_HEX,       NULL,   0x0,
 200         "IPSICTL Magic", HFILL }},
 201     { &hf_ipsictl_length,
 202       { "Length",       "ipsictl.length",
 203         FT_UINT16,      BASE_HEX,       NULL,   0x0,
 204         "IPSICTL Length", HFILL }},
 205     { &hf_ipsictl_type,
 206       { "Type", "ipsictl.type",
 207         FT_UINT16,      BASE_HEX,       NULL,   0x0,
 208         "IPSICTL Type", HFILL }},
 209     { &hf_ipsictl_sequence,
 210       { "Sequence",     "ipsictl.sequence",
 211         FT_UINT16,      BASE_HEX,       NULL,   0x0,
 212         "IPSICTL Sequence", HFILL }},
 213     { &hf_ipsictl_field1,
 214       { "Field1",       "ipsictl.field1",
 215         FT_UINT16,      BASE_HEX,       NULL,   0x0,
 216         "IPSICTL Field1", HFILL }},
 217     { &hf_ipsictl_data,
 218       { "Data", "ipsictl.data",
 219         FT_BYTES,       BASE_NONE,      NULL,   0x0,
 220         "IPSICTL data", HFILL }},
 221   };
 222
 223   static gint *ett[] = {
 224     &ett_ipsictl,
 225     &ett_ipsictl_pdu
 226   };
 227
 228   proto_ipsictl = proto_register_protocol("IPSICTL", "IPSICTL", "ipsictl");
 229   proto_register_field_array(proto_ipsictl, hf, array_length(hf));
 230   proto_register_subtree_array(ett, array_length(ett));
 231
 232 }
 233
 234 void proto_reg_handoff_ipsictl(void)
 235 {
 236
 237   dissector_handle_t ipsictl_handle = NULL;
 238
 239   ipsictl_handle = create_dissector_handle(dissect_ipsictl, proto_ipsictl);
 240
 241   dissector_add_uint("tcp.port", IPSICTL_PORT, ipsictl_handle);
 242
 243 }
 244
 245 /*
 246  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 247  *
 248  * Local Variables:
 249  * c-basic-offset: 2
 250  * tab-width: 8
 251  * indent-tabs-mode: nil
 252  * End:
 253  *
 254  * ex: set shiftwidth=2 tabstop=8 expandtab:
 255  * :indentSize=2:tabSize=8:noTabs=true:
 256  */