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440 lines
16 KiB
440 lines
16 KiB
/*****************************************************************************
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* sim.h: ETSI TS 103 194 DVB Simulcrypt
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*****************************************************************************
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* Copyright (C) 2010 VideoLAN
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* $Id$
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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*
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* This program is free software. It comes without any warranty, to
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* the extent permitted by applicable law. You can redistribute it
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* and/or modify it under the terms of the Do What The Fuck You Want
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* To Public License, Version 2, as published by Sam Hocevar. See
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* http://sam.zoy.org/wtfpl/COPYING for more details.
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*****************************************************************************/
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/*
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* Normative references:
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* - ETSI TS 101 197 V1.2.1 (2002-02) (DVB Simulcrypt - part 1)
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* - ETSI TR 102 035 V1.1.1 (2002-04) (Implementation guidelines of Simulcrypt)
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* - ETSI TS 103 197 V1.5.1 (2008-10) (DVB Simulcrypt)
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*/
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#ifndef __BITSTREAM_DVB_SIM_H__
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#define __BITSTREAM_DVB_SIM_H__
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*****************************************************************************
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* Generic "Type, Length, Value" message
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*****************************************************************************/
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#define TLVH_HEADER_SIZE 1
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#define TLV_HEADER_SIZE 4
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#define TLV_PARAM_EMPTY 0
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#define TLV_PARAM_EMPTY_SIZE 2
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typedef struct tlv_param_count_t {
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uint16_t i_type;
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uint16_t i_min;
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uint16_t i_max;
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} tlv_param_count_t;
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static inline void tlvh_set_version(uint8_t *p_tlv, uint8_t i_version)
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{
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p_tlv[0] = i_version;
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}
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static inline uint8_t tlvh_get_version(const uint8_t *p_tlv)
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{
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return p_tlv[0];
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}
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static inline uint8_t *tlvh_get_tlv(uint8_t *p_tlv)
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{
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return p_tlv + 1;
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}
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static inline void tlv_set_type(uint8_t *p_tlv, uint16_t i_type)
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{
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p_tlv[0] = i_type >> 8;
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p_tlv[1] = i_type & 0xff;
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}
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static inline uint16_t tlv_get_type(const uint8_t *p_tlv)
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{
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return (p_tlv[0] << 8) | p_tlv[1];
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}
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static inline void tlv_set_length(uint8_t *p_tlv, uint16_t i_length)
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{
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p_tlv[2] = i_length >> 8;
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p_tlv[3] = i_length & 0xff;
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}
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static inline uint16_t tlv_get_length(const uint8_t *p_tlv)
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{
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return (p_tlv[2] << 8) | p_tlv[3];
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}
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static inline void tlv_empty(uint8_t *p_tlv)
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{
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/* prepare a dummy parameter for later appending */
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p_tlv[TLV_HEADER_SIZE] = TLV_PARAM_EMPTY >> 8;
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p_tlv[TLV_HEADER_SIZE + 1] = TLV_PARAM_EMPTY & 0xff;
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}
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static inline void tlv_append_empty(uint8_t *p_tlv)
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{
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uint16_t i_length = tlv_get_length(p_tlv);
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p_tlv[TLV_HEADER_SIZE + i_length] = TLV_PARAM_EMPTY >> 8;
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p_tlv[TLV_HEADER_SIZE + i_length + 1] = TLV_PARAM_EMPTY & 0xff;
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}
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static inline uint8_t *tlv_get_param(uint8_t *p_tlv, uint16_t n)
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{
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uint16_t i_tlv_size = tlv_get_length(p_tlv);
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uint8_t *p_tlv_n = p_tlv + TLV_HEADER_SIZE;
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if (p_tlv_n - p_tlv - TLV_HEADER_SIZE > i_tlv_size) return NULL;
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while (n) {
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if (p_tlv_n - p_tlv > i_tlv_size)
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return NULL;
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p_tlv_n += TLV_HEADER_SIZE + tlv_get_length(p_tlv_n);
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n--;
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}
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if (p_tlv_n - p_tlv - TLV_HEADER_SIZE >= i_tlv_size) return NULL;
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return p_tlv_n;
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}
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static inline bool tlv_validate_param(const uint8_t *p_tlv,
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const uint8_t *p_tlv_n, uint16_t i_length)
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{
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uint16_t i_tlv_size = tlv_get_length(p_tlv);
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return (p_tlv_n + i_length - p_tlv <= i_tlv_size);
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}
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static inline bool tlv_validate(const uint8_t *p_tlv)
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{
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uint16_t i_tlv_size = tlv_get_length(p_tlv);
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const uint8_t *p_tlv_n = p_tlv + TLV_HEADER_SIZE;
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while (p_tlv_n - p_tlv <= i_tlv_size
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&& p_tlv_n + tlv_get_length(p_tlv_n) - p_tlv <= i_tlv_size)
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p_tlv_n += TLV_HEADER_SIZE + tlv_get_length(p_tlv_n);
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return (p_tlv_n - p_tlv - TLV_HEADER_SIZE == i_tlv_size);
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}
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static inline uint8_t *tlv_find_param(uint8_t *p_tlv, uint16_t i_type,
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uint16_t n)
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{
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uint8_t *p_param;
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uint8_t j = 0;
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while ((p_param = tlv_get_param(p_tlv, j)) != NULL) {
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j++;
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if (tlv_get_type(p_param) == i_type) {
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if (!n) return p_param;
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n--;
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}
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}
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return NULL;
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}
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static inline uint16_t tlv_count_param(uint8_t *p_tlv, uint16_t i_type)
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{
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uint16_t i_count = 0;
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uint8_t *p_tlv_n;
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uint16_t j = 0;
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while ((p_tlv_n = tlv_get_param(p_tlv, j)) != NULL) {
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j++;
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if (tlv_get_type(p_tlv_n) == i_type)
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i_count++;
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}
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return i_count;
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}
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static inline bool tlv_validate_count_param(uint8_t *p_tlv,
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const tlv_param_count_t *p_count)
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{
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uint16_t i_count = tlv_count_param(p_tlv, p_count->i_type);
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return (i_count >= p_count->i_min) && (i_count <= p_count->i_max);
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}
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#define TLV_DECLARE_PARAM(intf, name, param, utype, type) \
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static inline bool intf##_append_##name(uint8_t *p_tlv, type i_##name) \
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{ \
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uint8_t *p_tlv_n = tlv_find_param(p_tlv, TLV_PARAM_EMPTY, 0); \
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int i; \
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if (!tlv_validate_param(p_tlv, p_tlv_n, \
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sizeof(type) + TLV_PARAM_EMPTY_SIZE)) \
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return false; \
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tlv_set_type(p_tlv_n, param); \
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tlv_set_length(p_tlv_n, sizeof(type)); \
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for (i = 0; i < sizeof(type); i++) \
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p_tlv_n[4 + i] = ((utype)(i_##name) >> 8 * (sizeof(type) - i - 1)) \
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& 0xff; \
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tlv_append_empty(p_tlv_n); \
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return true; \
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} \
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\
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static inline type intf##_find_##name(uint8_t *p_tlv, uint16_t n) \
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{ \
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const uint8_t *p_tlv_n = tlv_find_param(p_tlv, param, n); \
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type i_##name = (type)(p_tlv_n[4]) << 8 * (sizeof(type) - 1); \
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int i; \
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for (i = 1; i < sizeof(type); i++) \
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i_##name |= (utype)(p_tlv_n[4 + i]) << 8 * (sizeof(type) - i - 1); \
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return i_##name; \
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}
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static inline bool tlv_append_data(uint8_t *p_tlv, uint16_t i_type,
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const uint8_t *p_data, uint16_t i_length)
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{
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uint8_t *p_tlv_n = tlv_find_param(p_tlv, TLV_PARAM_EMPTY, 0);
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int i;
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if (!tlv_validate_param(p_tlv, p_tlv_n,
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i_length + TLV_PARAM_EMPTY_SIZE))
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return false;
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tlv_set_type(p_tlv_n, i_type);
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tlv_set_length(p_tlv_n, i_length);
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memcpy(p_tlv_n + 4, p_data, i_length);
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tlv_append_empty(p_tlv_n);
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return true;
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}
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static inline uint8_t *tlv_find_data(uint8_t *p_tlv, uint16_t i_type,
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uint16_t n, uint16_t *pi_length)
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{
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const uint8_t *p_tlv_n = tlv_find_param(p_tlv, i_type, n);
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*pi_length = tlv_get_length(p_tlv_n);
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return p_tlv_n + 4;
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}
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/*****************************************************************************
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* ECMG
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*****************************************************************************/
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/* message types */
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#define ECMG_TYPE_CHANNEL_SETUP 0x1
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#define ECMG_TYPE_CHANNEL_TEST 0x2
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#define ECMG_TYPE_CHANNEL_STATUS 0x3
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#define ECMG_TYPE_CHANNEL_CLOSE 0x4
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#define ECMG_TYPE_CHANNEL_ERROR 0x5
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#define ECMG_TYPE_STREAM_SETUP 0x101
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#define ECMG_TYPE_STREAM_TEST 0x102
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#define ECMG_TYPE_STREAM_STATUS 0x103
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#define ECMG_TYPE_STREAM_CLOSEREQ 0x104
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#define ECMG_TYPE_STREAM_CLOSERESP 0x105
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#define ECMG_TYPE_STREAM_ERROR 0x106
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#define ECMG_TYPE_CW 0x201
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#define ECMG_TYPE_ECM 0x202
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/* parameter types */
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#define ECMG_PARAM_SUPERCASID 0x1
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#define ECMG_PARAM_SECTIONTSPKT 0x2
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#define ECMG_PARAM_DELAYSTART 0x3
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#define ECMG_PARAM_DELAYSTOP 0x4
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#define ECMG_PARAM_TRANSDELAYSTART 0x5
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#define ECMG_PARAM_TRANSDELAYSTOP 0x6
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#define ECMG_PARAM_REPPERIOD 0x7
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#define ECMG_PARAM_MAXSTREAMS 0x8
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#define ECMG_PARAM_MINCPDUR 0x9
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#define ECMG_PARAM_LEADCW 0xa
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#define ECMG_PARAM_CWPERMSG 0xb
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#define ECMG_PARAM_MAXCOMPTIME 0xc
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#define ECMG_PARAM_ACCESSCRIT 0xd
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#define ECMG_PARAM_CHANNELID 0xe
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#define ECMG_PARAM_STREAMID 0xf
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#define ECMG_PARAM_NOMCPDUR 0x10
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#define ECMG_PARAM_ACCESSCRITMODE 0x11
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#define ECMG_PARAM_CPNUMBER 0x12
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#define ECMG_PARAM_CPDUR 0x13
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#define ECMG_PARAM_CPCWCOMB 0x14
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#define ECMG_PARAM_ECM 0x15
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#define ECMG_PARAM_ACDELAYSTART 0x16
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#define ECMG_PARAM_ACDELAYSTOP 0x17
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#define ECMG_PARAM_CWENCRYPT 0x18
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#define ECMG_PARAM_ECMID 0x19
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#define ECMG_PARAM_ERRORSTATUS 0x7000
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#define ECMG_PARAM_ERRORINFO 0x7001
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static inline void ecmg_init(uint8_t *p_tlv)
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{
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tlv_empty(p_tlv);
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}
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TLV_DECLARE_PARAM(ecmg, supercasid, ECMG_PARAM_SUPERCASID, uint32_t, uint32_t)
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TLV_DECLARE_PARAM(ecmg, sectiontspkt, ECMG_PARAM_SECTIONTSPKT, uint8_t, uint8_t)
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TLV_DECLARE_PARAM(ecmg, delaystart, ECMG_PARAM_DELAYSTART, uint16_t, int16_t)
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TLV_DECLARE_PARAM(ecmg, delaystop, ECMG_PARAM_DELAYSTOP, uint16_t, int16_t)
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TLV_DECLARE_PARAM(ecmg, transdelaystart, ECMG_PARAM_TRANSDELAYSTART,
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uint16_t, int16_t)
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TLV_DECLARE_PARAM(ecmg, transdelaystop, ECMG_PARAM_TRANSDELAYSTOP,
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uint16_t, int16_t)
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TLV_DECLARE_PARAM(ecmg, repperiod, ECMG_PARAM_REPPERIOD, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, maxstreams, ECMG_PARAM_MAXSTREAMS, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, mincpdur, ECMG_PARAM_MINCPDUR, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, leadcw, ECMG_PARAM_LEADCW, uint8_t, uint8_t)
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TLV_DECLARE_PARAM(ecmg, cwpermsg, ECMG_PARAM_CWPERMSG, uint8_t, uint8_t)
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TLV_DECLARE_PARAM(ecmg, maxcomptime, ECMG_PARAM_MAXCOMPTIME, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, channelid, ECMG_PARAM_CHANNELID, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, streamid, ECMG_PARAM_STREAMID, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, nomcpdur, ECMG_PARAM_NOMCPDUR, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, accesscritmode, ECMG_PARAM_ACCESSCRITMODE,
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uint8_t, bool)
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TLV_DECLARE_PARAM(ecmg, cpnumber, ECMG_PARAM_CPNUMBER, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, cpdur, ECMG_PARAM_CPDUR, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, acdelaystart, ECMG_PARAM_ACDELAYSTART,
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uint16_t, int16_t)
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TLV_DECLARE_PARAM(ecmg, acdelaystop, ECMG_PARAM_ACDELAYSTOP, uint16_t, int16_t)
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TLV_DECLARE_PARAM(ecmg, ecmid, ECMG_PARAM_ECMID, uint16_t, uint16_t)
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TLV_DECLARE_PARAM(ecmg, errorstatus, ECMG_PARAM_ERRORSTATUS, uint16_t, uint16_t)
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static inline void ecmgcw_set_cpnum(uint8_t *p_param, uint16_t i_cpnum)
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{
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p_param[0] = i_cpnum >> 8;
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p_param[1] = i_cpnum & 0xff;
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}
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static inline uint16_t ecmgcw_get_cpnum(uint8_t *p_param)
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{
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return (p_param[0] << 8) | p_param[1];
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}
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static inline uint8_t *ecmgcw_get_cw(uint8_t *p_param)
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{
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return p_param + 2;
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}
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static inline bool ecmg_validate_param(const uint8_t *p_tlv_n)
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{
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static const uint16_t pi_ecmg_params_minlength[] = {
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/* 0x0 */ 0, 4, 1, 2, 2, 2, 2, 2,
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/* 0x8 */ 2, 2, 1, 1, 2, 0, 2, 2,
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/* 0x10 */ 2, 1, 2, 2, 0, 0, 2, 2,
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/* 0x18 */ 0, 2
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};
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uint16_t i_type = tlv_get_type(p_tlv_n);
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uint16_t i_length = tlv_get_length(p_tlv_n);
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if (i_type <= ECMG_PARAM_ECMID) {
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if (i_length < pi_ecmg_params_minlength[i_type]) return false;
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} else if (i_type == ECMG_PARAM_ERRORSTATUS) {
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if (i_length < 2) return false;
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}
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return true;
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}
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static inline bool ecmg_validate(uint8_t *p_tlv)
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{
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static const tlv_param_count_t p_ecmg_params_channel_setup[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_SUPERCASID, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_channel_test[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_channel_status[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_SECTIONTSPKT, 1, 1},
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{ECMG_PARAM_ACDELAYSTART, 0, 1}, {ECMG_PARAM_ACDELAYSTOP, 0, 1},
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{ECMG_PARAM_DELAYSTART, 1, 1}, {ECMG_PARAM_DELAYSTOP, 1, 1},
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{ECMG_PARAM_TRANSDELAYSTART, 0, 1}, {ECMG_PARAM_TRANSDELAYSTOP, 0, 1},
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{ECMG_PARAM_REPPERIOD, 1, 1}, {ECMG_PARAM_MAXSTREAMS, 1, 1},
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{ECMG_PARAM_MINCPDUR, 1, 1}, {ECMG_PARAM_LEADCW, 1, 1},
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{ECMG_PARAM_CWPERMSG, 1, 1}, {ECMG_PARAM_MAXCOMPTIME, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_channel_close[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_channel_error[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_ERRORSTATUS, 1, UINT16_MAX},
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{0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_stream_setup[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_STREAMID, 1, 1},
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{ECMG_PARAM_ECMID, 0, 1}, {ECMG_PARAM_NOMCPDUR, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_stream_test[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_STREAMID, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_stream_status[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_STREAMID, 1, 1},
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{ECMG_PARAM_ECMID, 0, 1}, {ECMG_PARAM_ACCESSCRITMODE, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_stream_close[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_STREAMID, 1, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_stream_error[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_STREAMID, 1, 1},
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{ECMG_PARAM_ERRORSTATUS, 1, UINT16_MAX}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_cw[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_STREAMID, 1, 1},
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{ECMG_PARAM_CPNUMBER, 1, 1}, {ECMG_PARAM_CWENCRYPT, 0, 1},
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{ECMG_PARAM_CPCWCOMB, 1, UINT16_MAX}, {ECMG_PARAM_CPDUR, 0, 1},
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{ECMG_PARAM_ACCESSCRIT, 0, 1}, {0, 0, 0}
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};
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static const tlv_param_count_t p_ecmg_params_ecm[] = {
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{ECMG_PARAM_CHANNELID, 1, 1}, {ECMG_PARAM_STREAMID, 1, 1},
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{ECMG_PARAM_CPNUMBER, 1, 1}, {ECMG_PARAM_ECM, 1, 1}, {0, 0, 0}
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};
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const tlv_param_count_t *p_param = {0, 0, 0};
|
|
uint8_t *p_tlv_n;
|
|
int j = 0;
|
|
|
|
switch (tlv_get_type(p_tlv)) {
|
|
case ECMG_TYPE_CHANNEL_SETUP:
|
|
p_param = p_ecmg_params_channel_setup; break;
|
|
case ECMG_TYPE_CHANNEL_TEST:
|
|
p_param = p_ecmg_params_channel_test; break;
|
|
case ECMG_TYPE_CHANNEL_STATUS:
|
|
p_param = p_ecmg_params_channel_status; break;
|
|
case ECMG_TYPE_CHANNEL_CLOSE:
|
|
p_param = p_ecmg_params_channel_close; break;
|
|
case ECMG_TYPE_CHANNEL_ERROR:
|
|
p_param = p_ecmg_params_channel_error; break;
|
|
case ECMG_TYPE_STREAM_SETUP:
|
|
p_param = p_ecmg_params_stream_setup; break;
|
|
case ECMG_TYPE_STREAM_TEST:
|
|
p_param = p_ecmg_params_stream_test; break;
|
|
case ECMG_TYPE_STREAM_STATUS:
|
|
p_param = p_ecmg_params_stream_status; break;
|
|
case ECMG_TYPE_STREAM_CLOSEREQ:
|
|
case ECMG_TYPE_STREAM_CLOSERESP:
|
|
p_param = p_ecmg_params_stream_close; break;
|
|
case ECMG_TYPE_STREAM_ERROR:
|
|
p_param = p_ecmg_params_stream_error; break;
|
|
case ECMG_TYPE_CW:
|
|
p_param = p_ecmg_params_cw; break;
|
|
case ECMG_TYPE_ECM:
|
|
p_param = p_ecmg_params_ecm; break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
while (p_param->i_type)
|
|
if (!tlv_validate_count_param(p_tlv, p_param++))
|
|
return false;
|
|
|
|
while ((p_tlv_n = tlv_get_param(p_tlv, j)) != NULL) {
|
|
j++;
|
|
if (!ecmg_validate_param(p_tlv_n)) return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|