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NXDN: Add DCALL / SDCALL Header and Data Block Assembly; SDCALL_IV Function;

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NXDN: Disable LICH "dividing" offbits check on sync detection, causes too many blips on still okay signal, particularly trunking;
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lwvmobile
2026-03-13 14:43:14 -04:00
parent f72eb31b30
commit ad77f266c4
4 changed files with 708 additions and 57 deletions
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10
include/dsd.h
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@@ -1291,6 +1291,7 @@ uint16_t crc12f(const uint8_t buf[], int len);
uint16_t crc15(const uint8_t buf[], int len);
uint16_t crc16cac(const uint8_t buf[], int len);
uint8_t crc7_scch(uint8_t bits[], int len); //converted from op25 crc6
uint32_t nxdn_message_crc32(uint8_t * input, int len);
//YSF Soft Decision Viterbi
uint32_t ysf_soft_decision_viterbi(uint8_t * dbuf, int d_len, int num_bytes, int offset, uint8_t * viterbi_bits, uint8_t * viterbi_bytes);
@@ -1320,6 +1321,7 @@ void NXDN_decode_VCALL(dsd_opts * opts, dsd_state * state, uint8_t * Message);
void NXDN_decode_VCALL_IV(dsd_opts * opts, dsd_state * state, uint8_t * Message);
char * NXDN_Call_Type_To_Str(uint8_t CallType);
void NXDN_Voice_Call_Option_To_Str(uint8_t VoiceCallOption, uint8_t * Duplex, uint8_t * TransmissionMode);
void NXDN_Data_Call_Option_To_Str(uint8_t DataCallOption, uint8_t * Duplex, uint8_t * TransmissionMode);
char * NXDN_Cipher_Type_To_Str(uint8_t CipherType);
//added these
void NXDN_decode_Prop(dsd_opts * opts, dsd_state * state, uint8_t * Message);
@@ -1331,6 +1333,10 @@ void NXDN_decode_srv_info(dsd_opts * opts, dsd_state * state, uint8_t * Message)
void NXDN_decode_site_info(dsd_opts * opts, dsd_state * state, uint8_t * Message);
void nxdn_decode_dst_info(dsd_opts * opts, dsd_state * state, uint8_t * Message);
void NXDN_decode_adj_site(dsd_opts * opts, dsd_state * state, uint8_t * Message);
void nxdn_sdcall_header(dsd_opts * opts, dsd_state * state, uint8_t * Message);
void nxdn_dcall_header(dsd_opts * opts, dsd_state * state, uint8_t * Message);
void nxdn_dcall_iv(dsd_opts * opts, dsd_state * state, int type, uint8_t * Message);
int nxdn_dcall_data(dsd_opts * opts, dsd_state * state, int type, uint8_t * Message);
//Type-D SCCH Message Decoder
void NXDN_decode_scch(dsd_opts * opts, dsd_state * state, uint8_t * Message, uint8_t direction);
void NXDN_decode_VCALL_ARIB(dsd_opts * opts, dsd_state * state, uint8_t * Message);
@@ -1610,6 +1616,9 @@ int udp_socket_connectA(dsd_opts * opts, dsd_state * state);
void udp_socket_blaster(dsd_opts * opts, dsd_state * state, size_t nsam, void * data);
void udp_socket_blasterA(dsd_opts * opts, dsd_state * state, size_t nsam, void * data);
//15-bit Scrambler
void pdu_scrambler_keystream_creation(uint8_t * ks, int lfsr, int len);
//RC4 function prototypes
void rc4_voice_decrypt (int drop, uint8_t keylength, uint8_t messagelength, uint8_t key[], uint8_t cipher[], uint8_t plain[]);
void rc4_block_output (int drop, int keylen, int meslen, uint8_t * key, uint8_t * output_blocks);
@@ -1652,6 +1661,7 @@ void lfsr_64_to_128(uint8_t * iv);
void LFSR128(dsd_state * state);
void LFSR128n(dsd_state * state);
void LFSR128d(dsd_state * state);
void LFSR128npdu(dsd_state * state);
#ifdef __cplusplus