/* packet-dvbci.c * Routines for DVB-CI (Common Interface) dissection * Copyright 2011, Martin Kaiser * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /* The dissector supports DVB-CI as defined in EN50221. * Reassembly of fragmented data is not implemented yet. * Ca_pmt_reply, low-level MMI and low-speed communication are unsupported. * * Missing functionality and CI+ support (www.ci-plus.com) will be * added in future versions. * * The pcap input format for this dissector is documented at * http://www.kaiser.cx/pcap-dvbci.html. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include "packet-ber.h" /* event byte in the pseudo-header */ #define DATA_CAM_TO_HOST 0xFF #define DATA_HOST_TO_CAM 0xFE #define CIS_READ 0xFD #define COR_WRITE 0xFC #define HW_EVT 0xFB #define IS_DATA_TRANSFER(e) (e==DATA_CAM_TO_HOST || e==DATA_HOST_TO_CAM) /* for [as]pdu_info_t when the message is allowed in either direction */ #define DIRECTION_ANY 0x0 /* source/destination address field */ #define ADDR_HOST "Host" #define ADDR_CAM "CAM" /* hardware event */ #define CAM_IN 0x01 #define CAM_OUT 0x02 #define POWER_ON 0x03 #define POWER_OFF 0x04 #define TS_ROUTE 0x05 #define TS_BYPASS 0x06 #define RESET_H 0x07 #define RESET_L 0x08 #define READY_H 0x09 #define READY_L 0x0A /* link layer */ #define ML_MORE 0x80 #define ML_LAST 0x00 /* transport layer */ #define NO_TAG 0x00 #define T_SB 0x80 #define T_RCV 0x81 #define T_CREATE_T_C 0x82 #define T_C_T_C_REPLY 0x83 #define T_DELETE_T_C 0x84 #define T_D_T_C_REPLY 0x85 #define T_REQUEST_T_C 0x86 #define T_NEW_T_C 0x87 #define T_T_C_ERROR 0x88 #define T_DATA_LAST 0xA0 #define T_DATA_MORE 0xA1 #define SB_VAL_MSG_AVAILABLE 0x80 #define SB_VAL_NO_MSG_AVAILABLE 0x00 /* session layer */ #define T_SESSION_NUMBER 0x90 #define T_OPEN_SESSION_REQUEST 0x91 #define T_OPEN_SESSION_RESPONSE 0x92 #define T_CREATE_SESSION 0x93 #define T_CREATE_SESSION_RESPONSE 0x94 #define T_CLOSE_SESSION_REQUEST 0x95 #define T_CLOSE_SESSION_RESPONSE 0x96 /* status for open/create session */ #define SESS_OPENED 0x00 #define SESS_NOT_OPENED_RES_NON_EXIST 0xF0 #define SESS_NOT_OPENED_RES_UNAVAIL 0xF1 #define SESS_NOT_OPENED_RES_VER_LOWER 0xF2 #define SESS_NOT_OPENED_RES_BUSY 0xF3 /* status for close session */ #define SESS_CLOSED 0x00 #define SESS_NB_NOT_ALLOC 0xF0 /* resource id */ #define RES_ID_TYPE_MASK 0xC0000000 #define RES_CLASS_MASK 0x3FFF0000 #define RES_TYPE_MASK 0x0000FFC0 #define RES_VER_MASK 0x0000003F /* resource class */ #define RES_CLASS_RM 0x01 #define RES_CLASS_AP 0x02 #define RES_CLASS_CA 0x03 #define RES_CLASS_HC 0x20 #define RES_CLASS_DT 0x24 #define RES_CLASS_MMI 0x40 #define RES_CLASS_AMI 0x41 #define RES_CLASS_LSC 0x60 #define RES_CLASS_CC 0x8C #define RES_CLASS_HLC 0x8D #define RES_CLASS_CUP 0x8E #define RES_CLASS_OPP 0x8F #define RES_CLASS_SAS 0x96 #define RES_ID_LEN 4 /* bytes */ #define RES_CLASS(_res_id) (_res_id & RES_CLASS_MASK) >> 16 #define RES_VER(_res_id) (_res_id & RES_VER_MASK) /* appinfo resource */ #define APP_TYPE_CA 0x1 #define APP_TYPE_EPG 0x2 /* ca resource */ #define LIST_MGMT_MORE 0x0 #define LIST_MGMT_FIRST 0x1 #define LIST_MGMT_LAST 0x2 #define LIST_MGMT_ONLY 0x3 #define LIST_MGMT_ADD 0x4 #define LIST_MGMT_UPDATE 0x5 #define CMD_ID_OK_DESCR 0x1 #define CMD_ID_OK_MMI 0x2 #define CMD_ID_QUERY 0x3 #define CMD_ID_NOT_SELECTED 0x4 #define CA_DESC_TAG 0x9 /* mmi resource */ #define CLOSE_MMI_CMD_ID_IMMEDIATE 0x0 #define CLOSE_MMI_CMD_ID_DELAY 0x1 /* only commands and parameters for high-level mmi are supported */ #define DISP_CMD_SET_MMI_MODE 1 #define DISP_CMD_GET_DISP_TBL 2 #define DISP_CMD_GET_INP_TBL 3 #define MMI_MODE_HIGH 1 #define DISP_REP_ID_MMI_MODE_ACK 0x01 #define DISP_REP_ID_DISP_CHAR_TBL 0x02 #define DISP_REP_ID_INP_CHAR_TBL 0x03 #define DISP_REP_ID_UNKNOWN_CMD 0xF0 #define DISP_REP_ID_UNKNOWN_MMI_MODE 0xF1 #define DISP_REP_ID_UNKNOWN_CHAR_TBL 0xF2 #define VISIBLE_ANS 0 #define BLIND_ANS 1 #define ANSW_ID_CANCEL 0x00 #define ANSW_ID_ANSWER 0x01 /* used for answer_text_length, choice_nb and item_nb */ #define NB_UNKNOWN 0xFF /* character tables, DVB-SI spec annex A.2 */ #define CHAR_TBL_8859_5 0x01 #define CHAR_TBL_8859_6 0x02 #define CHAR_TBL_8859_7 0x03 #define CHAR_TBL_8859_8 0x04 #define CHAR_TBL_8859_9 0x05 #define CHAR_TBL_8859_10 0x06 #define CHAR_TBL_8859_11 0x07 #define CHAR_TBL_8859_13 0x09 #define CHAR_TBL_8859_14 0x0A #define CHAR_TBL_8859_15 0x0B /* control codes for texts, DVB-SI spec annex A.1 */ #define TEXT_CTRL_EMPH_ON 0x86 #define TEXT_CTRL_EMPH_OFF 0x87 #define TEXT_CTRL_CRLF 0x8A /* application layer */ #define APDU_TAG_SIZE 3 /* "don't care" value for min_len_field and len_field (this can't be 0) */ #define LEN_FIELD_ANY G_MAXUINT32 static GHashTable *apdu_table = NULL; typedef struct _apdu_info_t { guint32 tag; /* the minimum length required for this apdu */ guint32 min_len_field; /* if the apdu has a well-known length, we enforce it here * (otherwise, we set this to LEN_FIELD_ANY) */ guint32 len_field; guint8 direction; void (*dissect_payload)(guint32, gint, tvbuff_t *, gint, packet_info *, proto_tree *); } apdu_info_t; static void dissect_dvbci_payload_rm(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree); static void dissect_dvbci_payload_ap(guint32 tag, gint len_field _U_, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree); static void dissect_dvbci_payload_ca(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree); static void dissect_dvbci_payload_hc(guint32 tag, gint len_field _U_, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree); static void dissect_dvbci_payload_dt(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree); static void dissect_dvbci_payload_mmi(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree); /* apdu defines */ #define T_PROFILE_ENQ 0x9F8010 #define T_PROFILE 0x9F8011 #define T_PROFILE_CHANGE 0x9F8012 #define T_APP_INFO_ENQ 0x9F8020 #define T_APP_INFO 0x9F8021 #define T_ENTER_MENU 0x9F8022 #define T_CA_INFO_ENQ 0x9F8030 #define T_CA_INFO 0x9F8031 #define T_CA_PMT 0x9F8032 #define T_TUNE 0x9F8400 #define T_REPLACE 0x9F8401 #define T_CLEAR_REPLACE 0x9F8402 #define T_ASK_RELEASE 0x9F8403 #define T_DATE_TIME_ENQ 0x9F8440 #define T_DATE_TIME 0x9F8441 #define T_CLOSE_MMI 0x9F8800 #define T_DISPLAY_CONTROL 0x9F8801 #define T_DISPLAY_REPLY 0x9F8802 #define T_ENQ 0x9F8807 #define T_ANSW 0x9F8808 #define T_MENU_LAST 0x9F8809 #define T_MENU_MORE 0x9F880A #define T_MENU_ANSW 0x9F880B #define T_LIST_LAST 0x9F880C #define T_LIST_MORE 0x9F880D /* the following apdus are recognized but not dissected in this release */ #define T_CA_PMT_REPLY 0x9F8033 /* these are no real apdus, they just use the same format */ #define T_TEXT_LAST 0x9F8803 #define T_TEXT_MORE 0x9F8804 #define IS_MENU_APDU(t) (t==T_MENU_MORE || t==T_MENU_LAST) static const apdu_info_t apdu_info[] = { {T_PROFILE_ENQ, 0, 0, DIRECTION_ANY, NULL}, {T_PROFILE, 0, LEN_FIELD_ANY, DIRECTION_ANY, dissect_dvbci_payload_rm}, {T_PROFILE_CHANGE, 0, 0, DIRECTION_ANY, NULL}, {T_APP_INFO_ENQ, 0, 0, DATA_HOST_TO_CAM, NULL}, {T_APP_INFO, 6, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_ap}, {T_ENTER_MENU, 0, 0, DATA_HOST_TO_CAM, NULL}, {T_CA_INFO_ENQ, 0, 0, DATA_HOST_TO_CAM, NULL}, {T_CA_INFO, 0, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_ca}, {T_CA_PMT, 6, LEN_FIELD_ANY, DATA_HOST_TO_CAM, dissect_dvbci_payload_ca}, {T_TUNE, 0, 8, DATA_CAM_TO_HOST, dissect_dvbci_payload_hc}, {T_REPLACE, 0, 5, DATA_CAM_TO_HOST, dissect_dvbci_payload_hc}, {T_CLEAR_REPLACE, 0, 1, DATA_CAM_TO_HOST, dissect_dvbci_payload_hc}, {T_ASK_RELEASE, 0, 0, DATA_HOST_TO_CAM, NULL}, {T_DATE_TIME_ENQ, 0, 1, DATA_CAM_TO_HOST, dissect_dvbci_payload_dt}, {T_DATE_TIME, 5, LEN_FIELD_ANY, DATA_HOST_TO_CAM, dissect_dvbci_payload_dt}, {T_CLOSE_MMI, 1, LEN_FIELD_ANY, DIRECTION_ANY, dissect_dvbci_payload_mmi}, {T_DISPLAY_CONTROL, 1, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_mmi}, {T_DISPLAY_REPLY, 1, LEN_FIELD_ANY, DATA_HOST_TO_CAM, dissect_dvbci_payload_mmi}, {T_ENQ, 2, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_mmi}, {T_ANSW, 1, LEN_FIELD_ANY, DATA_HOST_TO_CAM, dissect_dvbci_payload_mmi}, {T_MENU_LAST, 13, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_mmi}, {T_MENU_MORE, 13, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_mmi}, {T_MENU_ANSW, 0, 1, DATA_HOST_TO_CAM, dissect_dvbci_payload_mmi}, {T_LIST_LAST, 13, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_mmi}, {T_LIST_MORE, 13, LEN_FIELD_ANY, DATA_CAM_TO_HOST, dissect_dvbci_payload_mmi}, }; static const value_string dvbci_apdu_tag[] = { { T_PROFILE_ENQ, "Profile enquiry" }, { T_PROFILE, "Profile information" }, { T_PROFILE_CHANGE, "Profile change notification" }, { T_APP_INFO_ENQ, "Application info enquiry" }, { T_APP_INFO, "Application info" }, { T_ENTER_MENU, "Enter menu" }, { T_CA_INFO_ENQ, "CA info enquiry" }, { T_CA_INFO, "CA info" }, { T_CA_PMT, "CA PMT" }, { T_DATE_TIME_ENQ, "Date-Time enquiry" }, { T_DATE_TIME, "Date-Time" }, { T_CA_PMT_REPLY, "CA PMT reply" }, { T_TUNE, "Tune" }, { T_REPLACE, "Replace" }, { T_CLEAR_REPLACE, "Clear replace" }, { T_ASK_RELEASE, "Ask release" }, { T_CLOSE_MMI, "Close MMI" }, { T_DISPLAY_CONTROL, "Display control" }, { T_DISPLAY_REPLY, "Display reply" }, { T_TEXT_LAST, "Text last" }, { T_TEXT_MORE, "Text more" }, { T_ENQ, "Enquiry" }, { T_ANSW, "Answer" }, { T_MENU_LAST, "Menu last" }, { T_MENU_MORE, "Menu more" }, { T_MENU_ANSW, "Menu answer" }, { T_LIST_LAST, "List last" }, { T_LIST_MORE, "List more" }, { 0, NULL } }; /* convert a byte that contains two 4bit BCD digits into a decimal value */ #define BCD44_TO_DEC(x) (((x&0xf0) >> 4) * 10 + (x&0x0f)) void proto_reg_handoff_dvbci(void); static int proto_dvbci = -1; static gint ett_dvbci = -1; static gint ett_dvbci_hdr = -1; static gint ett_dvbci_link = -1; static gint ett_dvbci_transport = -1; static gint ett_dvbci_session = -1; static gint ett_dvbci_res = -1; static gint ett_dvbci_application = -1; static gint ett_dvbci_es = -1; static gint ett_dvbci_ca_desc = -1; static gint ett_dvbci_text = -1; static int hf_dvbci_event = -1; static int hf_dvbci_hw_event = -1; static int hf_dvbci_buf_size = -1; static int hf_dvbci_tcid = -1; static int hf_dvbci_ml = -1; static int hf_dvbci_c_tpdu_tag = -1; static int hf_dvbci_r_tpdu_tag = -1; static int hf_dvbci_t_c_id = -1; static int hf_dvbci_sb_value = -1; static int hf_dvbci_spdu_tag = -1; static int hf_dvbci_sess_status = -1; static int hf_dvbci_sess_nb = -1; static int hf_dvbci_close_sess_status = -1; static int hf_dvbci_apdu_tag = -1; static int hf_dvbci_app_type = -1; static int hf_dvbci_app_manf = -1; static int hf_dvbci_manf_code = -1; static int hf_dvbci_menu_str_len = -1; static int hf_dvbci_ca_sys_id = -1; static int hf_dvbci_ca_pmt_list_mgmt = -1; static int hf_dvbci_prog_num = -1; static int hf_dvbci_prog_info_len = -1; static int hf_dvbci_stream_type = -1; static int hf_dvbci_es_pid = -1; static int hf_dvbci_es_info_len = -1; static int hf_dvbci_ca_pmt_cmd_id = -1; static int hf_dvbci_descr_len = -1; static int hf_dvbci_ca_pid = -1; static int hf_dvbci_network_id = -1; static int hf_dvbci_original_network_id = -1; static int hf_dvbci_transport_stream_id = -1; static int hf_dvbci_service_id = -1; static int hf_dvbci_replacement_ref = -1; static int hf_dvbci_replaced_pid = -1; static int hf_dvbci_replacement_pid = -1; static int hf_dvbci_resp_intv = -1; static int hf_dvbci_utc_time = -1; static int hf_dvbci_local_offset = -1; static int hf_dvbci_close_mmi_cmd_id = -1; static int hf_dvbci_close_mmi_delay = -1; static int hf_dvbci_disp_ctl_cmd = -1; static int hf_dvbci_mmi_mode = -1; static int hf_dvbci_disp_rep_id = -1; static int hf_dvbci_char_tbl = -1; static int hf_dvbci_blind_ans = -1; static int hf_dvbci_ans_txt_len = -1; static int hf_dvbci_text_ctrl = -1; static int hf_dvbci_ans_id = -1; static int hf_dvbci_choice_nb = -1; static int hf_dvbci_choice_ref = -1; static int hf_dvbci_item_nb = -1; typedef struct _spdu_info_t { guint8 tag; guint8 direction; guint8 len_field; } spdu_info_t; static const value_string dvbci_event[] = { { DATA_HOST_TO_CAM, "data transfer Host -> CAM" }, { DATA_CAM_TO_HOST, "data transfer CAM -> Host" }, { CIS_READ, "read the Card Information Structure (CIS)" }, { COR_WRITE, "write into the Configuration Option Register (COR)" }, { HW_EVT, "hardware event" }, { 0, NULL } }; static const value_string dvbci_hw_event[] = { { CAM_IN, "CI Module is inserted" }, { CAM_OUT, "CI Module is removed" }, { POWER_ON, "CI slot power on" }, { POWER_OFF, "CI slot power off" }, { TS_ROUTE, "Transport stream routed through the CI Module" }, { TS_BYPASS, "Transport stream bypasses the CI Module" }, { RESET_H, "Reset pin is high" }, { RESET_L, "Reset pin is low" }, { READY_H, "Ready pin is high" }, { READY_L, "Ready pin is low" }, { 0, NULL } }; static const value_string dvbci_ml[] = { { ML_MORE, "more TPDU fragments pending" }, { ML_LAST, "last TPDU fragment" }, { 0, NULL } }; static const value_string dvbci_c_tpdu[] = { { T_RCV, "T_RCV" }, { T_CREATE_T_C, "T_create_t_c" }, { T_DELETE_T_C, "T_delete_t_c" }, { T_D_T_C_REPLY, "T_d_t_c_reply" }, { T_NEW_T_C, "T_new_t_c" }, { T_T_C_ERROR, "T_t_c_error" }, { T_DATA_LAST, "T_data_last" }, { T_DATA_MORE, "T_data_more" }, { 0, NULL } }; static const value_string dvbci_r_tpdu[] = { { T_C_T_C_REPLY, "T_c_tc_reply" }, { T_DELETE_T_C, "T_delete_t_c" }, { T_D_T_C_REPLY, "T_d_t_c_reply" }, { T_REQUEST_T_C, "T_request_t_c" }, { T_DATA_LAST, "T_data_last" }, { T_DATA_MORE, "T_data_more" }, { 0, NULL } }; static const value_string dvbci_sb_value[] = { { SB_VAL_MSG_AVAILABLE, "message available" }, { SB_VAL_NO_MSG_AVAILABLE, "no message available" }, { 0, NULL } }; static const value_string dvbci_spdu_tag[] = { { T_SESSION_NUMBER, "Session Number (payload data)" }, { T_OPEN_SESSION_REQUEST, "Open Session Request" }, { T_OPEN_SESSION_RESPONSE, "Open Session Response" }, { T_CREATE_SESSION, "Create Session" }, { T_CREATE_SESSION_RESPONSE, "Create Session Response" }, { T_CLOSE_SESSION_REQUEST, "Close Session Request" }, { T_CLOSE_SESSION_RESPONSE, "Close Session Response" }, { 0, NULL } }; static GHashTable *spdu_table = NULL; static const spdu_info_t spdu_info[] = { { T_SESSION_NUMBER, DIRECTION_ANY, 2 }, { T_OPEN_SESSION_REQUEST, DATA_CAM_TO_HOST, 4 }, { T_OPEN_SESSION_RESPONSE, DATA_HOST_TO_CAM, 7 }, { T_CREATE_SESSION, DATA_HOST_TO_CAM, 6 }, { T_CREATE_SESSION_RESPONSE, DATA_CAM_TO_HOST, 7 }, { T_CLOSE_SESSION_REQUEST, DIRECTION_ANY, 2 }, { T_CLOSE_SESSION_RESPONSE, DIRECTION_ANY, 3 } }; static const value_string dvbci_sess_status[] = { { SESS_OPENED, "Session opened" }, { SESS_NOT_OPENED_RES_NON_EXIST, "Resource does not exist" }, { SESS_NOT_OPENED_RES_UNAVAIL, "Resource exists but it's unavailable" }, { SESS_NOT_OPENED_RES_VER_LOWER, "Existing resource's version is lower than requested version" }, { SESS_NOT_OPENED_RES_BUSY, "Resource is busy" }, { 0, NULL } }; static const value_string dvbci_close_sess_status[] = { { SESS_CLOSED, "Session closed" }, { SESS_NB_NOT_ALLOC, "Session number not allocated" }, { 0, NULL } }; static const value_string dvbci_res_class[] = { { RES_CLASS_RM, "Resource Manager" }, { RES_CLASS_AP, "Application Info" }, { RES_CLASS_CA, "Conditional Access" }, { RES_CLASS_HC, "Host Control" }, { RES_CLASS_DT, "Date-Time" }, { RES_CLASS_MMI, "Man-machine interface (MMI)" }, { RES_CLASS_AMI, "Application MMI" }, { RES_CLASS_LSC, "Low-Speed Communication" }, { RES_CLASS_CC, "Content Control" }, { RES_CLASS_HLC, "Host Language & Country" }, { RES_CLASS_CUP, "CAM Upgrade" }, { RES_CLASS_OPP, "Operator Profile" }, { RES_CLASS_SAS, "Specific Application Support" }, { 0, NULL } }; static const value_string dvbci_app_type[] = { { APP_TYPE_CA, "Conditional Access" }, { APP_TYPE_EPG, "Electronic Progam Guide" }, { 0, NULL } }; static const value_string dvbci_ca_pmt_list_mgmt[] = { { LIST_MGMT_MORE, "more" }, { LIST_MGMT_FIRST, "first" }, { LIST_MGMT_LAST, "last" }, { LIST_MGMT_ONLY, "only" }, { LIST_MGMT_ADD, "add" }, { LIST_MGMT_UPDATE, "update" }, { 0, NULL } }; static const value_string dvbci_ca_pmt_cmd_id[] = { { CMD_ID_OK_DESCR, "ok descrambling" }, { CMD_ID_OK_MMI, "ok mmi" }, { CMD_ID_QUERY, "query" }, { CMD_ID_NOT_SELECTED, "not selected" }, { 0, NULL } }; static const value_string dvbci_close_mmi_cmd_id[] = { { CLOSE_MMI_CMD_ID_IMMEDIATE, "immediate close" }, { CLOSE_MMI_CMD_ID_DELAY, "delayed close" }, { 0, NULL } }; static const value_string dvbci_disp_ctl_cmd[] = { { DISP_CMD_SET_MMI_MODE, "set MMI mode" }, { DISP_CMD_GET_DISP_TBL, "get display character tables" }, { DISP_CMD_GET_INP_TBL, "get input character tables" }, { 0, NULL } }; static const value_string dvbci_mmi_mode[] = { { MMI_MODE_HIGH, "High-level MMI" }, { 0, NULL } }; static const value_string dvbci_disp_rep_id[] = { { DISP_REP_ID_MMI_MODE_ACK, "MMI mode acknowledge" }, { DISP_REP_ID_DISP_CHAR_TBL, "list display character tables" }, { DISP_REP_ID_INP_CHAR_TBL, "list input character tables" }, { DISP_REP_ID_UNKNOWN_CMD, "unknown display control command" }, { DISP_REP_ID_UNKNOWN_MMI_MODE, "unknown MMI mode" }, { DISP_REP_ID_UNKNOWN_CHAR_TBL, "unknown character table" }, { 0, NULL } }; static const value_string dvbci_blind_ans[] = { { VISIBLE_ANS, "visible" }, { BLIND_ANS, "blind" }, { 0, NULL } }; static const value_string dvbci_text_ctrl[] = { { TEXT_CTRL_EMPH_ON, "character emphasis on" }, { TEXT_CTRL_EMPH_OFF, "character emphasis off" }, { TEXT_CTRL_CRLF, "CR/LF" }, { 0, NULL } }; static const value_string dvbci_char_tbl[] = { { CHAR_TBL_8859_5, "ISO/IEC 8859-5 (Latin/Cyrillic)" }, { CHAR_TBL_8859_6, "ISO/IEC 8859-6 (Latin/Arabic)" }, { CHAR_TBL_8859_7, "ISO/IEC 8859-7 (Latin/Greek)" }, { CHAR_TBL_8859_8, "ISO/IEC 8859-8 (Latin/Hebrew)" }, { CHAR_TBL_8859_9, "ISO/IEC 8859-9 (Latin No. 5)" }, { CHAR_TBL_8859_10, "ISO/IEC 8859-10 (Latin No. 6)" }, { CHAR_TBL_8859_11, "ISO/IEC 8859-11 (Latin/Thai)" }, { CHAR_TBL_8859_13, "ISO/IEC 8859-13 (Latin No. 7)" }, { CHAR_TBL_8859_14, "ISO/IEC 8859-14 (Latin No. 8 (Celtic))" }, { CHAR_TBL_8859_15, "ISO/IEC 8859-15 (Latin No. 9)" }, /* don't add any multi-byte tables (>= 0x10) */ { 0, NULL } }; static const value_string dvbci_ans_id[] = { { ANSW_ID_CANCEL, "cancel" }, { ANSW_ID_ANSWER, "answer" }, { 0, NULL } }; static guint16 buf_size_cam; /* buffer size proposal by the CAM */ /* buffer size proposal by the host == negotiated buffer size */ static guint16 buf_size_host; /* this must be a function, not a macro, so that we can enforce the return type */ static inline gint16 two_comp_to_int16(guint16 x) { return (x&0x8000) ? -~(x-1) : x; } /* initialize/reset per capture state data */ static void dvbci_init(void) { buf_size_cam = 0; buf_size_host = 0; } /* dissect a text string that is encoded according to DVB-SI (EN 300 468) */ static void dissect_si_string(tvbuff_t *tvb, gint offset, gint str_len, packet_info *pinfo, proto_tree *tree, gchar *title, gboolean show_col_info) { guint8 byte0; guint8 *si_str = NULL; proto_item *pi; if (!title) /* we always have a title for our strings */ return; if (str_len==0) return; byte0 = tvb_get_guint8(tvb, offset); if (byte0>=0x01 && byte0<=0x0F) { proto_tree_add_item(tree, hf_dvbci_char_tbl, tvb, offset, 1, ENC_NA); offset++; str_len--; } else if (byte0>=0x10 && byte0 <= 0x1F) { pi = proto_tree_add_text(tree, tvb, offset, 1, "Invalid/unsupported character table"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Character tables with multi-byte encoding are not supported"); offset++; str_len--; proto_tree_add_text(tree, tvb, offset, str_len, "encoded text"); return; } /* for now, control characters are supported only at the beginning * of a string (this should cover all cases found in practice) */ else if (byte0>=0x80 && byte0<=0x9F) { proto_tree_add_item(tree, hf_dvbci_text_ctrl, tvb, offset, 1, ENC_NA); offset++; str_len--; } si_str = tvb_get_ephemeral_string(tvb, offset, str_len); if (!si_str) return; proto_tree_add_text(tree, tvb, offset, str_len, "%s: %s", title, si_str); if (show_col_info) col_append_sep_fstr(pinfo->cinfo, COL_INFO, " ", "%s", si_str); } /* dissect a ca descriptor in the ca_pmt */ static gint dissect_ca_desc(tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { gint offset_start; proto_item *pi; guint8 tag, len_byte; proto_item *ti = NULL; proto_tree *ca_desc_tree = NULL; offset_start = offset; tag = tvb_get_guint8(tvb,offset); if (tag != CA_DESC_TAG) { /* we could skip unknown descriptors and make this a warning */ pi = proto_tree_add_text(tree, tvb, offset, 1, "Invalid descriptor"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "The ca_pmt shall only contain ca descriptors (tag 0x9)"); return 0; } if (tree) { ti = proto_tree_add_text( tree, tvb, offset_start, -1, "Conditional Access descriptor"); ca_desc_tree = proto_item_add_subtree(ti, ett_dvbci_ca_desc); } offset++; len_byte = tvb_get_guint8(tvb,offset); proto_tree_add_item( ca_desc_tree, hf_dvbci_descr_len, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item( ca_desc_tree, hf_dvbci_ca_sys_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item( ca_desc_tree, hf_dvbci_ca_pid, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; if ((len_byte-4) != 0) { proto_tree_add_text( ca_desc_tree, tvb, offset, len_byte-4, "private data"); offset += (len_byte-4); } if (ti) proto_item_set_len(ti, offset-offset_start); return offset-offset_start; } /* dissect an elementary stream entry in the ca_pmt */ static gint dissect_es(tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { proto_item *ti = NULL; proto_tree *es_tree = NULL; gint offset_start, ca_desc_len; gint es_info_len, all_len; offset_start = offset; if (tree) { ti = proto_tree_add_text( tree, tvb, offset_start, -1, "Elementary Stream"); es_tree = proto_item_add_subtree(ti, ett_dvbci_application); } proto_tree_add_item( es_tree, hf_dvbci_stream_type, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item( es_tree, hf_dvbci_es_pid, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; es_info_len = tvb_get_ntohs(tvb, offset) & 0x0FFF; /* the definition of hf_dvbci_es_info_len also applies the mask */ proto_tree_add_item( es_tree, hf_dvbci_es_info_len, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; if (es_info_len != 0) { all_len = offset + es_info_len; proto_tree_add_item( es_tree, hf_dvbci_ca_pmt_cmd_id, tvb, offset, 1, ENC_NA); offset++; while (offset < all_len) { ca_desc_len = dissect_ca_desc(tvb, offset, pinfo, es_tree); if (ca_desc_len <= 0) return -1; offset += ca_desc_len; } } else { proto_tree_add_text( es_tree, tvb, 0, 0, "No CA descriptors for this elementary stream"); } if (ti) proto_item_set_len(ti, offset-offset_start); return offset-offset_start; } /* dissect a text pseudo-apdu */ static gint dissect_dvbci_text(const gchar *title, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { proto_item *ti = NULL; proto_tree *text_tree; guint32 tag; gint offset_start; gint len_field; offset_start = offset; if (!title) return 0; /* check the tag before setting up the tree */ tag = tvb_get_ntoh24(tvb, offset); if (tag!=T_TEXT_LAST && tag!=T_TEXT_MORE) return 0; ti = proto_tree_add_text(tree, tvb, offset_start, -1, "%s", title); text_tree = proto_item_add_subtree(ti, ett_dvbci_text); proto_tree_add_item(text_tree, hf_dvbci_apdu_tag, tvb, offset, APDU_TAG_SIZE, ENC_BIG_ENDIAN); offset += APDU_TAG_SIZE; offset = dissect_ber_length(pinfo, text_tree, tvb, offset, &len_field, NULL); dissect_si_string(tvb, offset, len_field, pinfo, text_tree, "Text", FALSE); offset += len_field; if (ti) proto_item_set_len(ti, offset-offset_start); return (offset-offset_start); } static void dissect_dvbci_res_id(tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree, guint32 res_id, gboolean show_col_info) { proto_item *ti = NULL; proto_tree *res_tree = NULL; if (show_col_info) { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "%s Version %d", val_to_str_const(RES_CLASS(res_id), dvbci_res_class, "Invalid Resource class"), RES_VER(res_id)); } if (tree) { ti = proto_tree_add_text( tree, tvb, offset, RES_ID_LEN, "Resource ID: 0x%04x", res_id); res_tree = proto_item_add_subtree(ti, ett_dvbci_res); proto_tree_add_text(res_tree, tvb, 0, 0, "%s", decode_numeric_bitfield(res_id, RES_ID_TYPE_MASK, 32, "Resource ID Type: 0x%x")); proto_tree_add_text(res_tree, tvb, 0, 0, "%s", decode_enumerated_bitfield_shifted(res_id, RES_CLASS_MASK, 32, dvbci_res_class, "Resource Class: %s")); proto_tree_add_text(res_tree, tvb, 0, 0, "%s", decode_numeric_bitfield(res_id, RES_TYPE_MASK, 32, "Resource Type: 0x%x")); proto_tree_add_text(res_tree, tvb, 0, 0, "%s", decode_numeric_bitfield(res_id, RES_VER_MASK, 32, "Resource Version: 0x%x")); } } /* dissect the body of a resource manager apdu */ static void dissect_dvbci_payload_rm(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { const gchar *tag_str; proto_item *pi; guint32 res_id; if (tag==T_PROFILE) { if (len_field % RES_ID_LEN) { tag_str = val_to_str(tag, dvbci_apdu_tag, "Unknown: %d"); pi = proto_tree_add_text(tree, tvb, 0, APDU_TAG_SIZE, "Invalid APDU length field"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field for %s must be a multiple of 4 bytes", tag_str); return; } while (tvb_reported_length_remaining(tvb, offset) != 0) { res_id = tvb_get_ntohl(tvb, offset); dissect_dvbci_res_id(tvb, offset, pinfo, tree, res_id, FALSE); offset += RES_ID_LEN; } } } static void dissect_dvbci_payload_ap(guint32 tag, gint len_field _U_, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { guint8 menu_str_len; guint8 *menu_string; if (tag==T_APP_INFO) { proto_tree_add_item(tree, hf_dvbci_app_type, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item( tree, hf_dvbci_app_manf, tvb, offset, 2, ENC_BIG_ENDIAN); offset+=2; proto_tree_add_item( tree, hf_dvbci_manf_code, tvb, offset, 2, ENC_BIG_ENDIAN); offset+=2; menu_str_len = tvb_get_guint8(tvb,offset); proto_tree_add_item( tree, hf_dvbci_menu_str_len, tvb, offset, 1, ENC_NA); offset++; /* ephemeral -> string is freed automatically when dissection of this packet is finished tvb_get_ephemeral_string() always returns a 0-terminated string */ menu_string = tvb_get_ephemeral_string(tvb, offset, menu_str_len); if (menu_string) { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Module name %s", menu_string); proto_tree_add_text(tree, tvb, offset, menu_str_len, "Menu string: %s", menu_string); } offset += menu_str_len; } } static void dissect_dvbci_payload_ca(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { const gchar *tag_str; proto_item *pi; guint16 prog_num; guint8 byte; guint prog_info_len; gint es_info_len, all_len; gint ca_desc_len; if (tag==T_CA_INFO) { if (len_field % 2) { tag_str = val_to_str(tag, dvbci_apdu_tag, "Unknown: %d"); pi = proto_tree_add_text(tree, tvb, 0, APDU_TAG_SIZE, "Invalid APDU length field"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field for %s must be a multiple of 2 bytes", tag_str); return; } while (tvb_reported_length_remaining(tvb, offset) != 0) { proto_tree_add_item( tree, hf_dvbci_ca_sys_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; } } else if (tag==T_CA_PMT) { proto_tree_add_item( tree, hf_dvbci_ca_pmt_list_mgmt, tvb, offset, 1, ENC_NA); offset++; prog_num = tvb_get_ntohs(tvb, offset); col_append_sep_fstr( pinfo->cinfo, COL_INFO, NULL, "Program number %x", prog_num); proto_tree_add_item( tree, hf_dvbci_prog_num, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; byte = tvb_get_guint8(tvb,offset); proto_tree_add_text(tree, tvb, offset, 1, "Version number: 0x%x, Current-next indicator: 0x%x", (byte&0x3E) >> 1, byte&0x01); offset++; prog_info_len = tvb_get_ntohs(tvb, offset) & 0x0FFF; /* the definition of hf_dvbci_prog_info_len also applies the mask */ proto_tree_add_item( tree, hf_dvbci_prog_info_len, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; if (prog_info_len != 0) { all_len = offset + prog_info_len; proto_tree_add_item( tree, hf_dvbci_ca_pmt_cmd_id, tvb, offset, 1, ENC_NA); offset++; while (offset < all_len) { ca_desc_len = dissect_ca_desc(tvb, offset, pinfo, tree); if (ca_desc_len <= 0) return; offset += ca_desc_len; } } else { proto_tree_add_text( tree, tvb, 0, 0, "No CA descriptors at program level"); } while (tvb_reported_length_remaining(tvb, offset) > 0) { es_info_len = dissect_es(tvb, offset, pinfo, tree); if (es_info_len <= 0) return; offset += es_info_len; } } } static void dissect_dvbci_payload_hc(guint32 tag, gint len_field _U_, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { proto_item *pi; guint16 nid, onid, tsid, svcid; guint8 ref; guint16 old_pid, new_pid; if (tag==T_TUNE) { nid = tvb_get_ntohs(tvb, offset); pi = proto_tree_add_item( tree, hf_dvbci_network_id, tvb, offset, 2, ENC_BIG_ENDIAN); if (nid) { expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_NOTE, "Network ID is usually ignored by hosts"); } offset += 2; onid = tvb_get_ntohs(tvb, offset); proto_tree_add_item( tree, hf_dvbci_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; tsid = tvb_get_ntohs(tvb, offset); proto_tree_add_item( tree, hf_dvbci_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; svcid = tvb_get_ntohs(tvb, offset); proto_tree_add_item( tree, hf_dvbci_service_id, tvb, offset, 2, ENC_BIG_ENDIAN); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "nid 0x%x, onid 0x%x, tsid 0x%x, svcid 0x%x", nid, onid, tsid, svcid); } else if (tag==T_REPLACE) { ref = tvb_get_guint8(tvb, offset); proto_tree_add_item( tree, hf_dvbci_replacement_ref, tvb, offset, 1, ENC_NA); offset++; old_pid = tvb_get_ntohs(tvb, offset) & 0x1FFF; proto_tree_add_item( tree, hf_dvbci_replaced_pid, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; new_pid = tvb_get_ntohs(tvb, offset) & 0x1FFF; proto_tree_add_item( tree, hf_dvbci_replacement_pid, tvb, offset, 2, ENC_BIG_ENDIAN); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "ref 0x%x, 0x%x -> 0x%x", ref, old_pid, new_pid); } else if (tag==T_CLEAR_REPLACE) { ref = tvb_get_guint8(tvb, offset); proto_tree_add_item( tree, hf_dvbci_replacement_ref, tvb, offset, 1, ENC_NA); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "ref 0x%x", ref); } } static void dissect_dvbci_payload_dt(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { nstime_t resp_intv; proto_item *pi = NULL; const gchar *tag_str; nstime_t utc_time; gint16 local_offset; /* field in the apdu */ gint bcd_time_offset; /* start offset of the bcd time in the tvbuff */ guint8 hour, min, sec; if (tag==T_DATE_TIME_ENQ) { nstime_set_zero(&resp_intv); resp_intv.secs = tvb_get_guint8(tvb, offset); pi = proto_tree_add_time_format(tree, hf_dvbci_resp_intv, tvb, offset, 1, &resp_intv, "Response interval is %s", rel_time_to_str(&resp_intv)); if (resp_intv.secs==0) { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "individual query"); if (pi) proto_item_append_text(pi, " (individual query)"); } else { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "update every %s", rel_time_to_str(&resp_intv)); } } else if (tag==T_DATE_TIME) { if (len_field!=5 && len_field!=7) { tag_str = match_strval(tag, dvbci_apdu_tag); pi = proto_tree_add_text(tree, tvb, APDU_TAG_SIZE, offset-APDU_TAG_SIZE, "Invalid APDU length field"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field for %s must be 5 or 7 bytes", tag_str); return; } /* the 40bit utc_time field is encoded according to DVB-SI spec, * section 5.2.5: * 16bit modified julian day (MJD), 24bit 6*4bit BCD digits hhmmss */ nstime_set_zero(&utc_time); utc_time.secs = (tvb_get_ntohs(tvb, offset) - 40587) * 86400; bcd_time_offset = offset+2; hour = BCD44_TO_DEC(tvb_get_guint8(tvb, bcd_time_offset)); min = BCD44_TO_DEC(tvb_get_guint8(tvb, bcd_time_offset+1)); sec = BCD44_TO_DEC(tvb_get_guint8(tvb, bcd_time_offset+2)); if (hour>23 || min>59 || sec>59) { pi = proto_tree_add_text( tree, tvb, bcd_time_offset, 3, "Invalid BCD time"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "BCD time must be hhmmss"); return; } utc_time.secs += hour*3600 + min*60 + sec; proto_tree_add_time_format(tree, hf_dvbci_utc_time, tvb, offset, 5, &utc_time, "%s UTC", abs_time_to_str(&utc_time, ABSOLUTE_TIME_UTC, FALSE)); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "%s UTC", abs_time_to_str(&utc_time, ABSOLUTE_TIME_UTC, FALSE)); offset += 5; if (len_field==7) { local_offset = two_comp_to_int16(tvb_get_ntohs(tvb, offset)); proto_tree_add_int_format(tree, hf_dvbci_local_offset, tvb, offset, 2, local_offset, "offset between UTC and local time is %d minutes", local_offset); } else { proto_tree_add_text(tree, tvb, 0, 0, "Offset between UTC and local time is unknown"); } } } static void dissect_dvbci_payload_mmi(guint32 tag, gint len_field, tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree) { gint offset_start; proto_item *pi; guint8 close_mmi_cmd_id; guint8 disp_ctl_cmd, disp_rep_id; const gchar *disp_ctl_cmd_str = NULL, *disp_rep_id_str = NULL; guint8 ans_txt_len; guint8 ans_id; guint8 choice_or_item_nb; gint text_len; guint8 choice_ref; offset_start = offset; switch(tag) { case T_CLOSE_MMI: close_mmi_cmd_id = tvb_get_guint8(tvb,offset); proto_tree_add_item(tree, hf_dvbci_close_mmi_cmd_id, tvb, offset, 1, ENC_NA); offset++; /* apdu layer len field checks are sufficient for "immediate" */ if (close_mmi_cmd_id == CLOSE_MMI_CMD_ID_DELAY) { if (len_field != 2) { pi = proto_tree_add_text(tree, tvb, APDU_TAG_SIZE, offset_start-APDU_TAG_SIZE, "Length field mismatch"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field must be 2"); return; } proto_tree_add_item(tree, hf_dvbci_close_mmi_delay, tvb, offset, 1, ENC_NA); } break; case T_DISPLAY_CONTROL: disp_ctl_cmd = tvb_get_guint8(tvb,offset); disp_ctl_cmd_str = val_to_str(disp_ctl_cmd, dvbci_disp_ctl_cmd, "unknown command"); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "%s", disp_ctl_cmd_str); proto_tree_add_item(tree, hf_dvbci_disp_ctl_cmd, tvb, offset, 1, ENC_NA); offset++; if (disp_ctl_cmd == DISP_CMD_SET_MMI_MODE) { proto_tree_add_item(tree, hf_dvbci_mmi_mode, tvb, offset, 1, ENC_NA); if (len_field != 2) { pi = proto_tree_add_text(tree, tvb, APDU_TAG_SIZE, offset_start-APDU_TAG_SIZE, "Length field mismatch"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field must be 2"); return; } } break; case T_DISPLAY_REPLY: disp_rep_id = tvb_get_guint8(tvb,offset); disp_rep_id_str = val_to_str(disp_rep_id, dvbci_disp_rep_id, "unknown command"); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "%s", disp_rep_id_str); proto_tree_add_item(tree, hf_dvbci_disp_rep_id, tvb, offset, 1, ENC_NA); offset++; if (disp_rep_id == DISP_REP_ID_MMI_MODE_ACK) { proto_tree_add_item(tree, hf_dvbci_mmi_mode, tvb, offset, 1, ENC_NA); } else if (disp_rep_id == DISP_REP_ID_DISP_CHAR_TBL || disp_rep_id == DISP_REP_ID_DISP_CHAR_TBL) { while (tvb_reported_length_remaining(tvb, offset) != 0) { proto_tree_add_item(tree, hf_dvbci_char_tbl, tvb, offset, 1, ENC_NA); offset++; } } break; case T_ENQ: proto_tree_add_item(tree, hf_dvbci_blind_ans, tvb, offset, 1, ENC_NA); offset++; ans_txt_len = tvb_get_guint8(tvb,offset); if (ans_txt_len == NB_UNKNOWN) { proto_tree_add_text(tree, tvb, offset, 1, "Length of expected answer is unknown"); } else proto_tree_add_item(tree, hf_dvbci_ans_txt_len, tvb, offset, 1, ENC_NA); offset++; dissect_si_string(tvb, offset, tvb_reported_length_remaining(tvb, offset), pinfo, tree, "Enquiry string", FALSE); break; case T_ANSW: ans_id = tvb_get_guint8(tvb,offset); proto_tree_add_item(tree, hf_dvbci_ans_id, tvb, offset, 1, ENC_NA); offset++; if (ans_id == ANSW_ID_ANSWER) { dissect_si_string(tvb, offset, tvb_reported_length_remaining(tvb, offset), pinfo, tree, "Answer", TRUE); } break; case T_MENU_LAST: case T_MENU_MORE: case T_LIST_LAST: case T_LIST_MORE: choice_or_item_nb = tvb_get_guint8(tvb,offset); if (choice_or_item_nb == NB_UNKNOWN) { proto_tree_add_text(tree, tvb, offset, 1, "Number of items is unknown"); } else { if (IS_MENU_APDU(tag)) { proto_tree_add_item( tree, hf_dvbci_choice_nb, tvb, offset, 1, ENC_NA); } else { proto_tree_add_item( tree, hf_dvbci_item_nb, tvb, offset, 1, ENC_NA); } } offset++; text_len = dissect_dvbci_text("Title", tvb, offset, pinfo, tree); offset += text_len; text_len = dissect_dvbci_text("Sub-title", tvb, offset, pinfo, tree); offset += text_len; text_len = dissect_dvbci_text("Bottom line", tvb, offset, pinfo, tree); offset += text_len; while (tvb_reported_length_remaining(tvb, offset)) { text_len = dissect_dvbci_text("Item", tvb, offset, pinfo, tree); offset += text_len; } break; case T_MENU_ANSW: choice_ref = tvb_get_guint8(tvb,offset); if (choice_ref == 0x0) { proto_tree_add_text(tree, tvb, offset, 1, "Selection was cancelled."); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "cancelled"); } else { proto_tree_add_item( tree, hf_dvbci_choice_ref, tvb, offset, 1, ENC_NA); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "Item %d", choice_ref); } break; default: break; } } static void dissect_dvbci_apdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint8 direction) { proto_item *ti; proto_tree *app_tree = NULL; guint32 apdu_len, tag, len_field; const gchar *tag_str; gint offset; proto_item *pi; apdu_info_t *ai; apdu_len = tvb_reported_length(tvb); if (tree) { ti = proto_tree_add_text(tree, tvb, 0, apdu_len, "Application Layer"); app_tree = proto_item_add_subtree(ti, ett_dvbci_application); } tag = tvb_get_ntoh24(tvb, 0); tag_str = match_strval(tag, dvbci_apdu_tag); offset = APDU_TAG_SIZE; col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(tag, dvbci_apdu_tag, "Unknown/invalid APDU")); if (tag_str) { proto_tree_add_item( app_tree, hf_dvbci_apdu_tag, tvb, 0, APDU_TAG_SIZE, ENC_NA); } else { pi = proto_tree_add_text(app_tree, tvb, 0, APDU_TAG_SIZE, "Invalid or unsupported APDU tag"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Invalid or unsupported APDU tag"); return; } offset = dissect_ber_length(pinfo, app_tree, tvb, offset, &len_field, NULL); if ((offset+len_field) > apdu_len) { pi = proto_tree_add_text(app_tree, tvb, APDU_TAG_SIZE, offset-APDU_TAG_SIZE, "Length field mismatch"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field mismatch"); return; } ai = (apdu_info_t *)g_hash_table_lookup(apdu_table, GUINT_TO_POINTER((guint)tag)); if (!ai) { pi = proto_tree_add_text( app_tree, tvb, 0, APDU_TAG_SIZE, "Unknown APDU"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Dissection of this APDU is not supported"); return; } if (ai->direction!=DIRECTION_ANY && ai->direction!=direction) { pi = proto_tree_add_text(app_tree, tvb, 0, APDU_TAG_SIZE, "Invalid APDU direction"); if (ai->direction==DATA_HOST_TO_CAM) { expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "This APDU must be sent from host to CAM"); } else { expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "This APDU must be sent from CAM to host"); } /* don't return, we can continue dissecting the APDU */ } if (ai->min_len_field!=LEN_FIELD_ANY && len_fieldmin_len_field) { pi = proto_tree_add_text(app_tree, tvb, 0, APDU_TAG_SIZE, "Invalid APDU length field"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Minimum length field for %s is %d", tag_str, ai->min_len_field); return; } if (ai->len_field!=LEN_FIELD_ANY && len_field!=ai->len_field) { pi = proto_tree_add_text(app_tree, tvb, 0, APDU_TAG_SIZE, "Invalid APDU length field"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field for %s must be %d", tag_str, ai->len_field); return; } if (ai->len_field!=0) { if (!ai->dissect_payload) { /* don't display an error, getting here means we have illegal * data in apdu_info[] */ return; } ai->dissect_payload(tag, len_field, tvb, offset, pinfo, app_tree); } } static void dissect_dvbci_spdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint8 direction) { guint32 spdu_len; proto_item *ti = NULL; proto_tree *sess_tree = NULL; guint8 tag; const gchar *tag_str; gint offset; proto_item *pi; guint32 len_field; const spdu_info_t *si; guint32 res_id; guint8 sess_stat; tvbuff_t *payload_tvb = NULL; gint payload_len; spdu_len = tvb_reported_length(tvb); if (tree) { ti = proto_tree_add_text(tree, tvb, 0, -1, "Session Layer"); sess_tree = proto_item_add_subtree(ti, ett_dvbci_session); } tag = tvb_get_guint8(tvb,0); tag_str = match_strval(tag, dvbci_spdu_tag); col_add_str(pinfo->cinfo, COL_INFO, val_to_str_const(tag, dvbci_spdu_tag, "Invalid SPDU")); if (tag_str) { proto_tree_add_item(sess_tree, hf_dvbci_spdu_tag, tvb, 0, 1, ENC_NA); } else { pi = proto_tree_add_text(sess_tree, tvb, 0, 1, "Invalid SPDU tag"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "See table 14 in the DVB-CI specification"); return; } offset = dissect_ber_length(pinfo, sess_tree, tvb, 1, &len_field, NULL); si = (spdu_info_t *)g_hash_table_lookup(spdu_table, GUINT_TO_POINTER((guint)tag)); if (!si) return; if (si->direction!=0 && si->direction!=direction) { pi = proto_tree_add_text(sess_tree, tvb, 0, 1, "Invalid SPDU direction"); if (si->direction==DATA_HOST_TO_CAM) { expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "This SPDU must be sent from host to CAM"); } else { expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "This SPDU must be sent from CAM to host"); } } if (si->len_field != len_field) { /* offset points to 1st byte after the length field */ pi = proto_tree_add_text(sess_tree, tvb, 1, offset-1, "Invalid SPDU length field"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Correct length field for %s is %d", tag_str, si->len_field); return; } switch(tag) { case T_OPEN_SESSION_REQUEST: res_id = tvb_get_ntohl(tvb, offset); /* get 32bit big-endian */ dissect_dvbci_res_id(tvb, offset, pinfo, sess_tree, res_id, TRUE); break; case T_CREATE_SESSION: res_id = tvb_get_ntohl(tvb, offset); dissect_dvbci_res_id(tvb, offset, pinfo, sess_tree, res_id, TRUE); /* DVB-CI uses network byte order == big endian */ proto_tree_add_item( sess_tree, hf_dvbci_sess_nb, tvb, offset+4, 2, ENC_BIG_ENDIAN); break; case T_OPEN_SESSION_RESPONSE: case T_CREATE_SESSION_RESPONSE: sess_stat = tvb_get_guint8(tvb, offset); proto_tree_add_item( sess_tree, hf_dvbci_sess_status, tvb, offset, 1, ENC_NA); res_id = tvb_get_ntohl(tvb, offset+1); dissect_dvbci_res_id(tvb, offset+1, pinfo, sess_tree, res_id, TRUE); proto_tree_add_item(sess_tree, hf_dvbci_sess_nb, tvb, offset+1+RES_ID_LEN, 2, ENC_BIG_ENDIAN); if (sess_stat == SESS_OPENED) col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Session opened"); else col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Error"); break; case T_CLOSE_SESSION_REQUEST: proto_tree_add_item( sess_tree, hf_dvbci_sess_nb, tvb, offset, 2, ENC_BIG_ENDIAN); break; case T_CLOSE_SESSION_RESPONSE: sess_stat = tvb_get_guint8(tvb, offset); proto_tree_add_item( sess_tree, hf_dvbci_close_sess_status, tvb, offset, 1, ENC_NA); proto_tree_add_item( sess_tree, hf_dvbci_sess_nb, tvb, offset+1, 2, ENC_BIG_ENDIAN); if (sess_stat == SESS_CLOSED) { col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Session closed"); } else col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "Error"); break; case T_SESSION_NUMBER: proto_tree_add_item( sess_tree, hf_dvbci_sess_nb, tvb, offset, 2, ENC_BIG_ENDIAN); payload_len = tvb_reported_length_remaining(tvb, offset+2); payload_tvb = tvb_new_subset(tvb, offset+2, payload_len, payload_len); break; default: break; } offset += len_field; if (payload_tvb) { proto_item_set_len(ti, spdu_len-tvb_reported_length(payload_tvb)); dissect_dvbci_apdu(payload_tvb, pinfo, tree, direction); } else { proto_item_set_len(ti, spdu_len); } } /* dissect the status of an r_tpdu, return its length or -1 for error */ static gint dissect_dvbci_tpdu_status(tvbuff_t *tvb, gint offset, packet_info *pinfo, proto_tree *tree, guint8 lpdu_tcid, guint8 r_tpdu_tag) { gint offset_new, len_start_offset; guint8 tag; guint32 len_field; guint8 t_c_id, sb_value; const gchar *sb_str; proto_item *pi; offset_new = offset; tag = tvb_get_guint8(tvb, offset_new); if (tag!=T_SB) { pi = proto_tree_add_text( tree, tvb, offset_new, 1, "Invalid status tag"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "This must always be T_SB (0x80)"); return -1; } col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "T_SB"); proto_tree_add_text(tree, tvb, offset_new, 1, "Response TPDU status"); offset_new++; len_start_offset = offset_new; offset_new = dissect_ber_length( pinfo, tree, tvb, offset_new, &len_field, NULL); if (len_field != 2) { pi = proto_tree_add_text( tree, tvb, len_start_offset, offset_new-len_start_offset, "Invalid status length field"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "This must always be 2"); return -1; } t_c_id = tvb_get_guint8(tvb, offset_new); proto_tree_add_item(tree, hf_dvbci_t_c_id, tvb, offset_new, 1, ENC_NA); /* tcid in transport header and link layer must only match for data * transmission commands */ if (t_c_id!=lpdu_tcid) { if (r_tpdu_tag==NO_TAG || r_tpdu_tag==T_DATA_MORE || r_tpdu_tag==T_DATA_LAST) { pi = proto_tree_add_text(tree, tvb, offset_new, 1, "Transport Connection ID mismatch"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "tcid is %d in the transport layer and %d in the link layer", t_c_id, lpdu_tcid); return -1; } } offset_new++; sb_value = tvb_get_guint8(tvb, offset_new); sb_str = match_strval(sb_value, dvbci_sb_value); if (sb_str) { col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "%s", sb_str); proto_tree_add_item(tree, hf_dvbci_sb_value, tvb, offset_new, 1, ENC_NA); } else { pi = proto_tree_add_text(tree, tvb, offset_new, 1, "Invalid SB_value"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Must be 0x00 or 0x80"); } offset_new++; return offset_new-offset; } /* dissect the header of a c_tpdu or r_tpdu return the length of the header (tag, len_field, t_c_id) or -1 for error */ static gint dissect_dvbci_tpdu_hdr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint8 direction, guint8 lpdu_tcid, guint32 tpdu_len, guint8 *hdr_tag, guint32 *body_len) { guint8 c_tpdu_tag, r_tpdu_tag, *tag=NULL; const gchar *c_tpdu_str, *r_tpdu_str; proto_item *pi; gint offset; guint32 len_field; guint8 t_c_id; if (direction==DATA_HOST_TO_CAM) { c_tpdu_tag = tvb_get_guint8(tvb, 0); tag = &c_tpdu_tag; c_tpdu_str = match_strval(c_tpdu_tag, dvbci_c_tpdu); if (c_tpdu_str) { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "%s", c_tpdu_str); proto_tree_add_item(tree, hf_dvbci_c_tpdu_tag, tvb, 0, 1, ENC_NA); } else { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Invalid Command-TPDU tag"); pi = proto_tree_add_text( tree, tvb, 0, 1, "Invalid Command-TPDU tag"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "see DVB-CI specification, table A.16 for valid values"); return -1; } } else { r_tpdu_tag = tvb_get_guint8(tvb, 0); tag = &r_tpdu_tag; r_tpdu_str = match_strval(r_tpdu_tag, dvbci_r_tpdu); if (r_tpdu_str) { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "%s", r_tpdu_str); proto_tree_add_item(tree, hf_dvbci_r_tpdu_tag, tvb, 0, 1, ENC_NA); } else { if (r_tpdu_tag == T_SB) { /* we have an r_tpdu without header and body, it contains only the status part */ if (hdr_tag) *hdr_tag = NO_TAG; if (body_len) *body_len = 0; return 0; } else { col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "Invalid Response-TPDU tag"); pi = proto_tree_add_text( tree, tvb, 0, 1, "Invalid Response-TPDU tag"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "see DVB-CI specification, table A.16 for valid values"); return -1; } } } offset = dissect_ber_length(pinfo, tree, tvb, 1, &len_field, NULL); if (((direction==DATA_HOST_TO_CAM) && ((offset+len_field)!=tpdu_len)) || ((direction==DATA_CAM_TO_HOST) && ((offset+len_field)>tpdu_len))) { /* offset points to 1st byte after the length field */ pi = proto_tree_add_text( tree, tvb, 1, offset-1, "Length field mismatch"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "Length field mismatch"); return -1; } t_c_id = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_dvbci_t_c_id, tvb, offset, 1, ENC_NA); /* tcid in transport header and link layer must only match for * data transmission commands */ if (t_c_id!=lpdu_tcid) { if (tag && (*tag==T_RCV || *tag==T_DATA_MORE || *tag==T_DATA_LAST)) { pi = proto_tree_add_text(tree, tvb, offset, 1, "Transport Connection ID mismatch"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "tcid is %d in the transport layer and %d in the link layer", t_c_id, lpdu_tcid); } } else { col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "tcid %d", t_c_id); } offset++; if (hdr_tag && tag) *hdr_tag = *tag; if (body_len) *body_len = len_field-1; /* -1 for t_c_id */ return offset; } static void dissect_dvbci_tpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint8 direction, guint8 lpdu_tcid) { guint32 tpdu_len, body_len; proto_item *ti = NULL; proto_tree *trans_tree = NULL; gint offset, status_len; guint8 hdr_tag = NO_TAG; tvbuff_t *payload_tvb = NULL; proto_item *pi; tpdu_len = tvb_reported_length(tvb); col_clear(pinfo->cinfo, COL_INFO); if (tree) { ti = proto_tree_add_text(tree, tvb, 0, -1, "Transport Layer"); trans_tree = proto_item_add_subtree(ti, ett_dvbci_transport); } offset = dissect_dvbci_tpdu_hdr(tvb, pinfo, trans_tree, direction, lpdu_tcid, tpdu_len, &hdr_tag, &body_len); if (offset==-1) return; proto_item_set_len(ti, offset); if ((offset>0) && (body_len!=0)) { payload_tvb = tvb_new_subset(tvb, offset, body_len, body_len); offset += body_len; } if (direction==DATA_CAM_TO_HOST) { /* minimum length of an rtpdu status is 4 bytes */ if (tpdu_len-offset < 4) { pi = proto_tree_add_text(trans_tree, tvb, 0, 0, "Response TPDU's status part is missing"); expert_add_info_format(pinfo, pi, PI_MALFORMED, PI_ERROR, "RTPDU status is mandatory"); return; } status_len = dissect_dvbci_tpdu_status( tvb, offset, pinfo, trans_tree, lpdu_tcid, hdr_tag); if (status_len<0) return; proto_tree_set_appendix(trans_tree, tvb, offset, status_len); } if (payload_tvb) dissect_dvbci_spdu(payload_tvb, pinfo, tree, direction); } static void dissect_dvbci_lpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint8 direction) { proto_item *ti; proto_tree *link_tree = NULL; guint32 payload_len; guint8 tcid, more_last; proto_item *pi; tvbuff_t *payload_tvb = NULL; payload_len = tvb_reported_length(tvb); col_add_str(pinfo->cinfo, COL_INFO, "LPDU"); if (tree) { ti = proto_tree_add_text(tree, tvb, 0, 2, "Link Layer"); link_tree = proto_item_add_subtree(ti, ett_dvbci_link); } tcid = tvb_get_guint8(tvb, 0); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "tcid %d", tcid); proto_tree_add_item(link_tree, hf_dvbci_tcid, tvb, 0, 1, ENC_NA); more_last = tvb_get_guint8(tvb, 1); if (more_last == ML_MORE) { col_append_sep_fstr( pinfo->cinfo, COL_INFO, NULL, "more fragments follow"); } else if (more_last == ML_LAST) col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "last fragment"); if (match_strval(more_last, dvbci_ml)) { proto_tree_add_item(link_tree, hf_dvbci_ml, tvb, 1, 1, ENC_NA); } else { pi = proto_tree_add_text( link_tree, tvb, 1, 1, "Invalid More/Last indicator"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Second byte of an LPDU must be 0x80 or 0x00"); } /* keep this error case separate, it'll be removed soon */ if (more_last == ML_MORE) { pi = proto_tree_add_text(link_tree, tvb, 1, 1, "Unsupported LPDU"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Reassembly of fragmented packets is not implemented yet"); return; } if (payload_len > buf_size_host) { pi = proto_tree_add_text( link_tree, tvb, 2, payload_len, "Payload too large"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Maximum payload length is the negotiated buffer size (%d bytes)", buf_size_host); } payload_tvb = tvb_new_subset(tvb, 2, -1, -1); dissect_dvbci_tpdu(payload_tvb, pinfo, tree, direction, tcid); } /* dissect DVB-CI buffer size negotiation */ static void dissect_dvbci_buf_neg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint8 direction) { guint16 buf_size; proto_item *pi; buf_size = tvb_get_ntohs(tvb, 0); col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %u bytes", direction == DATA_HOST_TO_CAM ? "negotiated buffer size" : "buffer size proposal", buf_size); if (direction == DATA_HOST_TO_CAM) { buf_size_host = buf_size; proto_tree_add_uint_format(tree, hf_dvbci_buf_size, tvb, 0, 2, buf_size, "Negotiated buffer size: %u bytes", buf_size); if (buf_size_host > buf_size_cam) { /* ATTENTION: wireshark may run through each packet multiple times if we didn't check the direction, we'd get the error when wireshark runs through the initial CAM packet for the 2nd time */ pi = proto_tree_add_text(tree, tvb, 0, 2, "Illegal buffer size command"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Host shall not request a buffer size larger than the CAM proposal"); } } else if (direction == DATA_CAM_TO_HOST) { buf_size_cam = buf_size; proto_tree_add_uint_format(tree, hf_dvbci_buf_size, tvb, 0, 2, buf_size, "Buffer size proposal by the CAM: %u bytes", buf_size); } if (buf_size < 16) { pi = proto_tree_add_text(tree, tvb, 0, 2, "Illegal buffer size"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "Minimum buffer size is 16 bytes"); } } static int dissect_dvbci(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { gint packet_len, offset = 0, offset_ver, offset_evt, offset_len_field; guint8 version, event; const gchar *event_str; guint16 len_field; proto_item *ti, *ti_hdr; proto_tree *dvbci_tree = NULL, *hdr_tree = NULL; tvbuff_t *payload_tvb; guint16 cor_addr; guint8 cor_value; proto_item *pi; guint8 hw_event; if (tvb_length(tvb) < 4) return 0; offset_ver = offset; version = tvb_get_guint8(tvb, offset++); if (version != 0) return 0; offset_evt = offset; event = tvb_get_guint8(tvb, offset++); event_str = match_strval(event, dvbci_event); if (!event_str) return 0; packet_len = tvb_reported_length(tvb); offset_len_field = offset; len_field = tvb_get_ntohs(tvb, offset); if (len_field != (packet_len-4)) return 0; offset += 2; col_set_str(pinfo->cinfo, COL_PROTOCOL, "DVB-CI"); col_set_str(pinfo->cinfo, COL_INFO, event_str); if (tree) { ti = proto_tree_add_protocol_format(tree, proto_dvbci, tvb, 0, packet_len, "DVB Common Interface: %s", event_str); dvbci_tree = proto_item_add_subtree(ti, ett_dvbci); ti_hdr = proto_tree_add_text(dvbci_tree, tvb, 0, offset, "Pseudo header"); hdr_tree = proto_item_add_subtree(ti_hdr, ett_dvbci_hdr); proto_tree_add_text(hdr_tree, tvb, offset_ver, 1, "Version: %d", version); proto_tree_add_item(hdr_tree, hf_dvbci_event, tvb, offset_evt, 1, ENC_NA); proto_tree_add_text(hdr_tree, tvb, offset_len_field, 2, "Length field: %d", len_field); } if (IS_DATA_TRANSFER(event)) { if (event == DATA_HOST_TO_CAM) { SET_ADDRESS(&pinfo->src, AT_STRINGZ, (int)strlen(ADDR_HOST)+1, ADDR_HOST); SET_ADDRESS(&pinfo->dst, AT_STRINGZ, (int)strlen(ADDR_CAM)+1 , ADDR_CAM); } else { SET_ADDRESS(&pinfo->src, AT_STRINGZ, (int)strlen(ADDR_CAM)+1 , ADDR_CAM); SET_ADDRESS(&pinfo->dst, AT_STRINGZ, (int)strlen(ADDR_HOST)+1, ADDR_HOST); } payload_tvb = tvb_new_subset( tvb, offset, -1, -1); if (len_field == 2) { dissect_dvbci_buf_neg(payload_tvb, pinfo, dvbci_tree, event); } else { dissect_dvbci_lpdu(payload_tvb, pinfo, dvbci_tree, event); } } else if (event==COR_WRITE) { /* I did not assign hf_... values for cor_addr and cor_value there's no need to filter against them */ cor_addr = tvb_get_ntohs(tvb, offset); if (cor_addr == 0xffff) { proto_tree_add_text(dvbci_tree, tvb, offset, 2, "COR address is unknown"); col_append_sep_str(pinfo->cinfo, COL_INFO, ": ", "unknown address"); } else if (cor_addr > 0xFFE) { pi = proto_tree_add_text(tree, tvb, offset, 2, "Invalid COR address"); expert_add_info_format(pinfo, pi, PI_PROTOCOL, PI_WARN, "COR address must not be greater than 0xFFE (DVB-CI spec, A.5.6)"); } else { proto_tree_add_text(dvbci_tree, tvb, offset, 2, "COR address: 0x%x", cor_addr); col_append_sep_fstr(pinfo->cinfo, COL_INFO, ": ", "address 0x%x", cor_addr); } offset += 2; cor_value = tvb_get_guint8(tvb, offset); proto_tree_add_text(dvbci_tree, tvb, offset, 1, "COR value: 0x%x", cor_value); col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "value 0x%x", cor_value); offset++; } else if (event==HW_EVT) { hw_event = tvb_get_guint8(tvb, offset); col_set_str(pinfo->cinfo, COL_INFO, val_to_str_const(hw_event, dvbci_hw_event, "Invalid hardware event")); proto_tree_add_item(dvbci_tree, hf_dvbci_hw_event, tvb, offset, 1, ENC_NA); offset++; } return packet_len; } void proto_register_dvbci(void) { guint i; static gint *ett[] = { &ett_dvbci, &ett_dvbci_hdr, &ett_dvbci_link, &ett_dvbci_transport, &ett_dvbci_session, &ett_dvbci_res, &ett_dvbci_application, &ett_dvbci_es, &ett_dvbci_ca_desc, &ett_dvbci_text }; static hf_register_info hf[] = { { &hf_dvbci_event, { "Event", "dvbci.event", FT_UINT8, BASE_HEX, VALS(dvbci_event), 0, NULL, HFILL } }, { &hf_dvbci_hw_event, { "Hardware event", "dvbci.hw_event", FT_UINT8, BASE_HEX, VALS(dvbci_hw_event), 0, NULL, HFILL } }, { &hf_dvbci_buf_size, { "Buffer Size", "dvbci.buf_size", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_tcid, { "Transport Connection ID", "dvbci.tcid", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_ml, { "More/Last indicator", "dvbci.more_last", FT_UINT8, BASE_HEX, VALS(dvbci_ml), 0, NULL, HFILL } }, { &hf_dvbci_c_tpdu_tag, { "Command TPDU Tag", "dvbci.c_tpdu_tag", FT_UINT8, BASE_HEX, VALS(dvbci_c_tpdu), 0, NULL, HFILL } }, { &hf_dvbci_r_tpdu_tag, { "Response TPDU Tag", "dvbci.r_tpdu_tag", FT_UINT8, BASE_HEX, VALS(dvbci_r_tpdu), 0, NULL, HFILL } }, { &hf_dvbci_t_c_id, { "Transport Connection ID", "dvbci.t_c_id", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_sb_value, { "SB Value", "dvbci.sb_value", FT_UINT8, BASE_HEX, VALS(dvbci_sb_value), 0, NULL, HFILL } }, { &hf_dvbci_spdu_tag, { "SPDU Tag", "dvbci.spdu_tag", FT_UINT8, BASE_HEX, VALS(dvbci_spdu_tag), 0, NULL, HFILL } }, { &hf_dvbci_sess_status, { "Session Status", "dvbci.session_status", FT_UINT8, BASE_HEX, VALS(dvbci_sess_status), 0, NULL, HFILL } }, { &hf_dvbci_sess_nb, { "Session Number", "dvbci.session_nb", FT_UINT16, BASE_DEC, NULL , 0, NULL, HFILL } }, { &hf_dvbci_close_sess_status, { "Session Status", "dvbci.close_session_status", FT_UINT8, BASE_HEX, VALS(dvbci_close_sess_status), 0, NULL, HFILL } }, { &hf_dvbci_apdu_tag, { "APDU Tag", "dvbci.apdu_tag", FT_UINT24, BASE_HEX, VALS(dvbci_apdu_tag), 0, NULL, HFILL } }, { &hf_dvbci_app_type, { "Application type", "dvbci.application_type", FT_UINT8, BASE_HEX, VALS(dvbci_app_type), 0, NULL, HFILL } }, { &hf_dvbci_app_manf, { "Application manufacturer", "dvbci.application_manufacturer", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_manf_code, { "Manufacturer code", "dvbci.manufacturer_code", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_menu_str_len, { "Menu string length", "dvbci.menu_string_length", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvbci_ca_sys_id, { "CA system ID", "dvbci.ca_system_id", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_ca_pmt_list_mgmt, { "CA PMT list management", "dvbci.ca_pmt_list_management", FT_UINT8, BASE_HEX, VALS(dvbci_ca_pmt_list_mgmt), 0, NULL, HFILL } }, { &hf_dvbci_prog_num, { "Program number", "dvbci.program_number", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_prog_info_len, { "Program info length", "dvbci.program_info_length", FT_UINT16, BASE_HEX, NULL, 0x0FFF, NULL, HFILL } }, { &hf_dvbci_stream_type, { "Stream type", "dvbci.stream_type", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_es_pid, { "Elementary stream PID", "dvbci.elementary_pid", FT_UINT16, BASE_HEX, NULL, 0x1FFF, NULL, HFILL } }, { &hf_dvbci_es_info_len, { "Elementary stream info length", "dvbci.es_info_length", FT_UINT16, BASE_HEX, NULL, 0x0FFF, NULL, HFILL } }, { &hf_dvbci_ca_pmt_cmd_id, { "CA PMT command ID", "dvbci.ca_pmt_cmd_id", FT_UINT8, BASE_HEX, VALS(dvbci_ca_pmt_cmd_id), 0, NULL, HFILL } }, { &hf_dvbci_descr_len, { "CA descriptor length", "dvbci.ca_desc_len", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvbci_ca_pid, { "CA PID", "dvbci.ca_pid", FT_UINT16, BASE_HEX, NULL, 0x1FFF, NULL, HFILL } }, { &hf_dvbci_network_id, { "Network ID", "dvbci.hc.nid", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_original_network_id, { "Original network ID", "dvbci.hc.onid", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_transport_stream_id, { "Transport stream ID", "dvbci.hc.tsid", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_service_id, { "Service ID", "dvbci.hc.svcid", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_replacement_ref, { "Replacement reference", "dvbci.hc.replacement_ref", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL } }, { &hf_dvbci_replaced_pid, { "Replaced PID", "dvbci.hc.replaced_pid", FT_UINT16, BASE_HEX, NULL, 0x1FFF, NULL, HFILL } }, { &hf_dvbci_replacement_pid, { "Replacement PID", "dvbci.hc.replacement_pid", FT_UINT16, BASE_HEX, NULL, 0x1FFF, NULL, HFILL } }, { &hf_dvbci_resp_intv, { "Response interval", "dvbci.dt.resp_interval", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, NULL, HFILL } }, { &hf_dvbci_utc_time, { "UTC time", "dvbci.dt.utc_time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL, 0, NULL, HFILL } }, /* we have to use FT_INT16 instead of FT_RELATIVE_TIME, local offset can be negative */ { &hf_dvbci_local_offset, { "Local time offset", "dvbci.dt.local_offset", FT_INT16, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvbci_close_mmi_cmd_id, { "Command ID", "dvbci.mmi.close_mmi_cmd_id", FT_UINT8, BASE_HEX, VALS(dvbci_close_mmi_cmd_id), 0, NULL, HFILL } }, { &hf_dvbci_close_mmi_delay, { "Delay (in sec)", "dvbci.mmi.delay", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvbci_disp_ctl_cmd, { "Command", "dvbci.mmi.disp_ctl_cmd", FT_UINT8, BASE_HEX, VALS(dvbci_disp_ctl_cmd), 0, NULL, HFILL } }, { &hf_dvbci_mmi_mode, { "MMI mode", "dvbci.mmi.mode", FT_UINT8, BASE_HEX, VALS(dvbci_mmi_mode), 0, NULL, HFILL } }, { &hf_dvbci_disp_rep_id, { "Reply ID", "dvbci.mmi.disp_rep_id", FT_UINT8, BASE_HEX, VALS(dvbci_disp_rep_id), 0, NULL, HFILL } }, { &hf_dvbci_char_tbl, { "Character table", "dvbci.mmi.char_tbl", FT_UINT8, BASE_HEX, VALS(dvbci_char_tbl), 0, NULL, HFILL } }, { &hf_dvbci_blind_ans, { "Blind answer flag", "dvbci.mmi.blind_ans", FT_UINT8, BASE_HEX, VALS(dvbci_blind_ans), 0x01, NULL, HFILL } }, { &hf_dvbci_ans_txt_len, { "Answer text length", "dvbci.mmi.ans_txt_len", FT_UINT8, BASE_DEC, NULL , 0, NULL, HFILL } }, { &hf_dvbci_text_ctrl, { "Text control code", "dvbci.mmi.text_ctrl", FT_UINT8, BASE_HEX, VALS(dvbci_text_ctrl), 0, NULL, HFILL } }, { &hf_dvbci_ans_id, { "Answer ID", "dvbci.mmi.ans_id", FT_UINT8, BASE_HEX, VALS(dvbci_ans_id) , 0, NULL, HFILL } }, { &hf_dvbci_choice_nb, { "Number of menu items", "dvbci.mmi.choice_nb", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvbci_choice_ref, { "Selected item", "dvbci.mmi.choice_ref", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } }, { &hf_dvbci_item_nb, { "Number of list items", "dvbci.mmi.item_nb", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } } }; spdu_table = g_hash_table_new(g_direct_hash, g_direct_equal); if (!spdu_table) return; for(i=0; i