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  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12 /* This dissector supports the CI+ Content and Service Protection Gateway
  13    (CSPG-CI+) as defined in in Open IPTV Forum Specification Volume 7 V2.1
  14    http://www.openiptvforum.org/release_2.html */
  15
  16 #include "config.h"
  17
  18 #include <epan/packet.h>
  19
  20 void proto_register_oipf(void);
  21 void proto_reg_handoff_oipf(void);
  22
  23 static dissector_handle_t oipf_ciplus_handle;
  24
  25 static int proto_oipf_ciplus;
  26
  27 static int ett_oipf_ciplus;
  28
  29 static int hf_oipf_ciplus_cmd_id;
  30 static int hf_oipf_ciplus_ca_sys_id;
  31 static int hf_oipf_ciplus_trx_id;
  32 static int hf_oipf_ciplus_send_datatype_nbr;
  33 static int hf_oipf_ciplus_dat_id;
  34 static int hf_oipf_ciplus_dat_len;
  35 static int hf_oipf_ciplus_data;
  36
  37 /* the application id for this protocol in the CI+ SAS resource
  38    this is actually a 64bit hex number, we can't use a 64bit number as a key
  39    for the dissector table directly, we have to process it as a string
  40    (the string must not be a local variable as glib stores a pointer to
  41    it in the hash table) */
  42 static const char sas_app_id_str_oipf[] = "0x0108113101190000";
  43
  44 static const value_string oipf_ciplus_cmd_id[] = {
  45     { 0x01, "send_msg" },
  46     { 0x02, "reply_msg" },
  47     { 0x03, "parental_control_info" },
  48     { 0x04, "rights_info" },
  49     { 0x05, "system_info" },
  50     { 0, NULL }
  51 };
  52
  53 static const value_string oipf_ciplus_dat_id[] = {
  54     { 0x01, "oipf_ca_vendor_specific_information" },
  55     { 0x02, "oipf_country_code" },
  56     { 0x03, "oipf_parental_control_url" },
  57     { 0x04, "oipf_rating_type" },
  58     { 0x05, "oipf_rating_value" },
  59     { 0x06, "oipf_rights_issuer_url" },
  60     { 0x07, "oipf_access_status" },
  61     { 0x08, "oipf_status" },
  62     { 0, NULL }
  63 };
  64
  65
  66 static int
  67 dissect_oipf_ciplus(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void *data _U_)
  68 {
  69     int         msg_len;
  70     proto_tree *oipf_ciplus_tree;
  71     unsigned    offset           = 0;
  72     uint8_t     i, send_datatype_nbr;
  73     uint16_t    dat_len;
  74
  75     /* an OIPF CI+ message minimally contains command_id (1 byte),
  76        ca sys id (2 bytes), transaction id (4 bytes) and
  77        number of sent datatypes (1 byte) */
  78     msg_len = tvb_reported_length(tvb);
  79     if (msg_len < 8)
  80         return 0;
  81
  82     oipf_ciplus_tree = proto_tree_add_subtree(tree, tvb, 0, msg_len, ett_oipf_ciplus, NULL, "Open IPTV Forum CSPG-CI+");
  83
  84     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_cmd_id,
  85             tvb, offset, 1, ENC_BIG_ENDIAN);
  86     offset++;
  87     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_ca_sys_id,
  88             tvb, offset, 2, ENC_BIG_ENDIAN);
  89     offset += 2;
  90     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_trx_id,
  91             tvb, offset, 4, ENC_BIG_ENDIAN);
  92     offset += 4;
  93
  94     send_datatype_nbr = tvb_get_uint8(tvb, offset);
  95     proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_send_datatype_nbr,
  96             tvb, offset, 1, ENC_BIG_ENDIAN);
  97     offset++;
  98
  99     for (i=0; i<send_datatype_nbr; i++) {
 100         proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_dat_id,
 101                 tvb, offset, 1, ENC_BIG_ENDIAN);
 102         offset++;
 103
 104         dat_len = tvb_get_ntohs(tvb, offset);
 105         proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_dat_len,
 106                 tvb, offset, 2, ENC_BIG_ENDIAN);
 107         offset += 2;
 108
 109         proto_tree_add_item(oipf_ciplus_tree, hf_oipf_ciplus_data,
 110                 tvb, offset, dat_len, ENC_NA);
 111         offset += dat_len;
 112     }
 113
 114     return offset;
 115 }
 116
 117 void
 118 proto_register_oipf(void)
 119 {
 120     static int *ett[] = {
 121         &ett_oipf_ciplus
 122     };
 123
 124     static hf_register_info hf[] = {
 125         { &hf_oipf_ciplus_cmd_id,
 126             { "Command ID", "oipf.ciplus.cmd_id", FT_UINT8, BASE_HEX,
 127                VALS(oipf_ciplus_cmd_id), 0, NULL, HFILL } },
 128         { &hf_oipf_ciplus_ca_sys_id,
 129             { "CA system ID", "oipf.ciplus.ca_system_id", FT_UINT16, BASE_HEX,
 130                 NULL, 0, NULL, HFILL } },
 131         { &hf_oipf_ciplus_trx_id,
 132             { "Transaction ID", "oipf.ciplus.transaction_id",
 133                 FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL } },
 134         { &hf_oipf_ciplus_send_datatype_nbr,
 135             { "Number of data items", "oipf.ciplus.num_items", FT_UINT8,
 136                 BASE_DEC, NULL, 0, NULL, HFILL } },
 137         { &hf_oipf_ciplus_dat_id,
 138             { "Datatype ID", "oipf.ciplus.datatype_id", FT_UINT8, BASE_HEX,
 139                 VALS(oipf_ciplus_dat_id), 0, NULL, HFILL } },
 140         { &hf_oipf_ciplus_dat_len,
 141             { "Datatype length", "oipf.ciplus.datatype_len", FT_UINT16,
 142                 BASE_DEC, NULL, 0, NULL, HFILL } },
 143         { &hf_oipf_ciplus_data,
 144             { "Data", "oipf.ciplus.data", FT_BYTES, BASE_NONE,
 145                 NULL, 0, NULL, HFILL } }
 146     };
 147
 148     proto_oipf_ciplus = proto_register_protocol("Open IPTV Forum CSPG-CI+", "OIPF CI+", "oipf.ciplus");
 149     proto_register_field_array(proto_oipf_ciplus, hf, array_length(hf));
 150     proto_register_subtree_array(ett, array_length(ett));
 151
 152     oipf_ciplus_handle = register_dissector("oipf.ciplus", dissect_oipf_ciplus, proto_oipf_ciplus);
 153 }
 154
 155 void
 156 proto_reg_handoff_oipf(void)
 157 {
 158     dissector_add_string("dvb-ci.sas.app_id_str",
 159             sas_app_id_str_oipf, oipf_ciplus_handle);
 160 }
 161
 162 /*
 163  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 164  *
 165  * Local variables:
 166  * c-basic-offset: 4
 167  * tab-width: 8
 168  * indent-tabs-mode: nil
 169  * End:
 170  *
 171  * vi: set shiftwidth=4 tabstop=8 expandtab:
 172  * :indentSize=4:tabSize=8:noTabs=true:
 173  */