epan/dissectors/packet-oipf.c

   1 /* packet-oipf.c
   2  * Dissector for Open IPTV Forum protocols
   3  * Copyright 2012, Martin Kaiser <martin@kaiser.cx>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (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 along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 /* This dissector supports the CI+ Content and Service Protection Gateway
  27    (CSPG-CI+) as defined in in Open IPTV Forum Specification Volume 7 V2.1
  28    http://www.openiptvforum.org/release_2.html */
  29
  30 #include "config.h"
  31
  32 #include <glib.h>
  33 #include <epan/packet.h>
  34
  35 static int proto_oipf_ciplus = -1;
  36
  37 static gint ett_oipf_ciplus = -1;
  38
  39 static int hf_oipf_ciplus_cmd_id = -1;
  40 static int hf_oipf_ciplus_ca_sys_id = -1;
  41 static int hf_oipf_ciplus_trx_id = -1;
  42 static int hf_oipf_ciplus_send_datatype_nbr = -1;
  43 static int hf_oipf_ciplus_dat_id = -1;
  44 static int hf_oipf_ciplus_dat_len = -1;
  45 static int hf_oipf_ciplus_data = -1;
  46
  47 /* the application id for this protocol in the CI+ SAS resource
  48    this is actually a 64bit hex number, we can't use a 64bit number as a key
  49    for the dissector table directly, we have to process it as a string
  50    (the string must not be a local variable as glib stores a pointer to
  51    it in the hash table) */
  52 static const gchar sas_app_id_str_oipf[] = "0x0108113101190000";
  53
  54 static const value_string oipf_ciplus_cmd_id[] = {
  55     { 0x01, "send_msg" },
  56     { 0x02, "reply_msg" },
  57     { 0x03, "parental_control_info" },
  58     { 0x04, "rights_info" },
  59     { 0x05, "system_info" },
  60     { 0, NULL }
  61 };
  62
  63 static const value_string oipf_ciplus_dat_id[] = {
  64     { 0x01, "oipf_ca_vendor_specific_information" },
  65     { 0x02, "oipf_country_code" },
  66     { 0x03, "oipf_parental_control_url" },
  67     { 0x04, "oipf_rating_type" },
  68     { 0x05, "oipf_rating_value" },
  69     { 0x06, "oipf_rights_issuer_url" },
  70     { 0x07, "oipf_access_status" },
  71     { 0x08, "oipf_status" },
  72     { 0, NULL }
  73 };
  74
  75
  76 static int
  77 dissect_oipf_ciplus(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void *data _U_)
  78 {
  79     gint        msg_len;
  80     proto_item *ti;
  81     proto_tree *oipf_ciplus_tree;
  82     guint       offset           = 0;
  83     guint8      i, send_datatype_nbr;
  84     guint16     dat_len;
  85
  86     /* an OIPF CI+ message minimally contains command_id (1 byte),
  87        ca sys id (2 bytes), transaction id (4 bytes) and
  88        number of sent datatypes (1 byte) */
  89     msg_len = tvb_reported_length(tvb);
  90     if (msg_len < 8)
  91         return 0;
  92
  93     ti = proto_tree_add_text(tree, tvb, 0, msg_len, "Open IPTV Forum CSPG-CI+");
  94     oipf_ciplus_tree = proto_item_add_subtree(ti, ett_oipf_ciplus);
  95
  96     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_cmd_id,
  97             tvb, offset, 1, ENC_BIG_ENDIAN);
  98     offset++;
  99     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_ca_sys_id,
 100             tvb, offset, 2, ENC_BIG_ENDIAN);
 101     offset += 2;
 102     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_trx_id,
 103             tvb, offset, 4, ENC_BIG_ENDIAN);
 104     offset += 4;
 105
 106     send_datatype_nbr = tvb_get_guint8(tvb, offset);
 107     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_send_datatype_nbr,
 108             tvb, offset, 1, ENC_BIG_ENDIAN);
 109     offset++;
 110
 111     for (i=0; i<send_datatype_nbr; i++) {
 112         proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_dat_id,
 113                 tvb, offset, 1, ENC_BIG_ENDIAN);
 114         offset++;
 115
 116         dat_len = tvb_get_ntohs(tvb, offset);
 117         proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_dat_len,
 118                 tvb, offset, 2, ENC_BIG_ENDIAN);
 119         offset += 2;
 120
 121         proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_data,
 122                 tvb, offset, dat_len, ENC_BIG_ENDIAN);
 123         offset += dat_len;
 124     }
 125
 126     return offset;
 127 }
 128
 129 void
 130 proto_register_oipf(void)
 131 {
 132     static gint *ett[] = {
 133         &ett_oipf_ciplus
 134     };
 135
 136     static hf_register_info hf[] = {
 137         { &hf_oipf_ciplus_cmd_id,
 138             { "Command ID", "oipf.ciplus.cmd_id", FT_UINT8, BASE_HEX,
 139                VALS(oipf_ciplus_cmd_id), 0, NULL, HFILL } },
 140         { &hf_oipf_ciplus_ca_sys_id,
 141             { "CA system ID", "oipf.ciplus.ca_system_id", FT_UINT16, BASE_HEX,
 142                 NULL, 0, NULL, HFILL } },
 143         { &hf_oipf_ciplus_trx_id,
 144             { "Transaction ID", "oipf.ciplus.transaction_id",
 145                 FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL } },
 146         { &hf_oipf_ciplus_send_datatype_nbr,
 147             { "Number of data items", "oipf.ciplus.num_items", FT_UINT8,
 148                 BASE_DEC, NULL, 0, NULL, HFILL } },
 149         { &hf_oipf_ciplus_dat_id,
 150             { "Datatype ID", "oipf.ciplus.datatype_id", FT_UINT8, BASE_HEX,
 151                 VALS(oipf_ciplus_dat_id), 0, NULL, HFILL } },
 152         { &hf_oipf_ciplus_dat_len,
 153             { "Datatype length", "oipf.ciplus.datatype_len", FT_UINT16,
 154                 BASE_DEC, NULL, 0, NULL, HFILL } },
 155         { &hf_oipf_ciplus_data,
 156             { "Data", "oipf.ciplus.data", FT_BYTES, BASE_NONE,
 157                 NULL, 0, NULL, HFILL } }
 158     };
 159
 160     proto_oipf_ciplus = proto_register_protocol(
 161             "Open IPTV Forum CSPG-CI+", "OIPF CI+", "oipf.ciplus");
 162     proto_register_field_array(proto_oipf_ciplus, hf, array_length(hf));
 163     proto_register_subtree_array(ett, array_length(ett));
 164
 165 }
 166
 167
 168 void
 169 proto_reg_handoff_oipf(void)
 170 {
 171     dissector_handle_t oipf_ciplus_handle;
 172
 173     oipf_ciplus_handle =
 174         new_create_dissector_handle(dissect_oipf_ciplus, proto_oipf_ciplus);
 175
 176     dissector_add_string("dvb-ci.sas.app_id_str",
 177             sas_app_id_str_oipf, oipf_ciplus_handle);
 178 }
 179
 180 /*
 181  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 182  *
 183  * Local variables:
 184  * c-basic-offset: 4
 185  * tab-width: 8
 186  * indent-tabs-mode: nil
 187  * End:
 188  *
 189  * vi: set shiftwidth=4 tabstop=8 expandtab:
 190  * :indentSize=4:tabSize=8:noTabs=true:
 191  */