kopia lustrzana https://github.com/M17-Project/M17_Implementations
fixed the payload omission bug
Wojciech Kaczmarski
rodzic
fdf40f7489
commit
1538db6043
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@ -96,7 +96,7 @@ blocks:
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bus_structure: null
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coordinate: [16, 532.0]
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rotation: 0
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state: disabled
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state: enabled
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- name: blocks_stream_mux_0
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id: blocks_stream_mux
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parameters:
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@ -136,7 +136,7 @@ blocks:
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bus_structure: null
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coordinate: [536, 300.0]
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rotation: 0
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state: true
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state: enabled
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- name: blocks_vector_source_x_0
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id: blocks_vector_source_x
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parameters:
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@ -217,7 +217,7 @@ blocks:
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bus_structure: null
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coordinate: [112, 452.0]
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rotation: 0
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state: enabled
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state: disabled
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- name: blocks_vector_source_x_0_2_0
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id: blocks_vector_source_x
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parameters:
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@ -256,7 +256,7 @@ blocks:
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bus_structure: null
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coordinate: [208, 576.0]
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rotation: 0
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state: disabled
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state: enabled
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- name: note_0
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id: note
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parameters:
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@ -23,8 +23,8 @@ uint32_t frame_buff_cnt;
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uint8_t data[16], next_data[16]; //raw payload, packed bits
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uint16_t fn=0; //16-bit Frame Number (for the stream mode)
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uint8_t lich_cnt=0; //0..5 LICH counter
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uint8_t got_lsf=0; //have we filled the LSF struct yet?
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uint8_t finished=0;
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uint8_t got_lsf=0; //have we transmitted the LSF yet?
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uint8_t finished=0; //no more data at stdin?
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//used for signatures
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uint8_t digest[16]={0}; //16-byte field for the stream digest
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@ -32,6 +32,8 @@ uint8_t signed_str=0; //is the stream supposed to be signed?
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uint8_t priv_key[32]={0}; //private key
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uint8_t sig[64]={0}; //ECDSA signature
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int dummy=0; //dummy var to make compiler quieter
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void usage(void)
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{
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fprintf(stderr, "Usage:\n");
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@ -136,138 +138,24 @@ int main(int argc, char* argv[])
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const struct uECC_Curve_t* curve = uECC_secp256r1();
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if(fread(&(next_lsf.dst), 6, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.src), 6, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.type), 2, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.meta), 14, 1, stdin)<1) finished=1;
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if(fread(next_data, 16, 1, stdin)<1) finished=1;
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//send out the preamble
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frame_buff_cnt=0;
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send_preamble(frame_buff, &frame_buff_cnt, 0); //0 - LSF preamble, as opposed to 1 - BERT preamble
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fwrite((uint8_t*)frame_buff, SYM_PER_FRA*sizeof(float), 1, stdout);
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//read data
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dummy=fread(&(lsf.dst), 6, 1, stdin);
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dummy=fread(&(lsf.src), 6, 1, stdin);
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dummy=fread(&(lsf.type), 2, 1, stdin);
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dummy=fread(&(lsf.meta), 14, 1, stdin);
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dummy=fread(data, 16, 1, stdin);
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while(!finished)
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{
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if(lich_cnt == 0)
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if(!got_lsf)
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{
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lsf = next_lsf;
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//calculate LSF CRC
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uint16_t ccrc=LSF_CRC(&lsf);
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lsf.crc[0]=ccrc>>8;
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lsf.crc[1]=ccrc&0xFF;
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}
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memcpy(data, next_data, sizeof(data));
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//we could discard the data we already have
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if(fread(&(next_lsf.dst), 6, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.src), 6, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.type), 2, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.meta), 14, 1, stdin)<1) finished=1;
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if(fread(next_data, 16, 1, stdin)<1) finished=1;
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if(got_lsf) //stream frames
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{
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//send stream frame syncword
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frame_buff_cnt=0;
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send_syncword(frame_buff, &frame_buff_cnt, SYNC_STR);
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//extract LICH from the whole LSF
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extract_LICH(lich, lich_cnt, &lsf);
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//encode the LICH
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encode_LICH(lich_encoded, lich);
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//unpack LICH (12 bytes)
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unpack_LICH(enc_bits, lich_encoded);
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//encode the rest of the frame (starting at bit 96 - 0..95 are filled with LICH)
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signed_str=(lsf.type[0]>>3)&1;
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if(!signed_str)
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conv_encode_stream_frame(&enc_bits[96], data, finished ? (fn | 0x8000) : fn);
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else
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{
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//dont set the MSB is the stream is signed
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conv_encode_stream_frame(&enc_bits[96], data, fn);
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//update the stream digest
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if(signed_str) //signed stream? check bit 11 of TYPE
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{
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for(uint8_t i=0; i<sizeof(digest); i++)
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digest[i]^=data[i];
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uint8_t tmp=digest[0];
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for(uint8_t i=0; i<sizeof(digest)-1; i++)
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digest[i]=digest[i+1];
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digest[sizeof(digest)-1]=tmp;
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}
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}
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//reorder bits
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reorder_bits(rf_bits, enc_bits);
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//randomize
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randomize_bits(rf_bits);
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//send frame data
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send_data(frame_buff, &frame_buff_cnt, rf_bits);
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fwrite((uint8_t*)frame_buff, SYM_PER_FRA*sizeof(float), 1, stdout);
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//increment the Frame Number
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fn = (fn + 1) % 0x8000;
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//increment the LICH counter
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lich_cnt = (lich_cnt + 1) % 6;
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if(finished && signed_str) //if we are done, and the stream is signed, so we need to transmit the signature (4 frames)
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{
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uECC_sign(priv_key, digest, sizeof(digest), sig, curve);
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//4 frames with 512-bit signature
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fn = 0x7FFC; //signature has to start at 0x7FFC to end at 0x7FFF (0xFFFF with EoT marker set)
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for(uint8_t i=0; i<4; i++)
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{
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frame_buff_cnt=0;
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send_syncword(frame_buff, &frame_buff_cnt, SYNC_STR);
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extract_LICH(lich, lich_cnt, &lsf); //continue with next LICH_CNT
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encode_LICH(lich_encoded, lich);
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unpack_LICH(enc_bits, lich_encoded);
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conv_encode_stream_frame(&enc_bits[96], &sig[i*16], fn);
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reorder_bits(rf_bits, enc_bits);
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randomize_bits(rf_bits);
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send_data(frame_buff, &frame_buff_cnt, rf_bits);
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fwrite((uint8_t*)frame_buff, SYM_PER_FRA*sizeof(float), 1, stdout);
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fn = (fn<0x7FFE) ? fn+1 : (0x7FFF|0x8000);
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lich_cnt = (lich_cnt + 1) % 6;
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}
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//dump data
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/*fprintf(stderr, "ENC-Digest: ");
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for(uint8_t i=0; i<sizeof(digest); i++)
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fprintf(stderr, "%02X", digest[i]);
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fprintf(stderr, "\n");
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fprintf(stderr, "Key: ");
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for(uint8_t i=0; i<sizeof(priv_key); i++)
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fprintf(stderr, "%02X", priv_key[i]);
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fprintf(stderr, "\n");
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fprintf(stderr, "Signature: ");
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for(uint8_t i=0; i<sizeof(sig); i++)
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fprintf(stderr, "%02X", sig[i]);
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fprintf(stderr, "\n");*/
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}
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//debug-only
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#ifdef FN60_DEBUG
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if(fn==6*10)
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return 0;
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#endif
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}
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else //LSF
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{
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got_lsf=1;
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//send out the preamble
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frame_buff_cnt=0;
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send_preamble(frame_buff, &frame_buff_cnt, 0); //0 - LSF preamble, as opposed to 1 - BERT preamble
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fwrite((uint8_t*)frame_buff, SYM_PER_FRA*sizeof(float), 1, stdout);
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//debug
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//fprintf(stderr, "LSF\n");
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//send LSF syncword
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frame_buff_cnt=0;
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@ -288,29 +176,149 @@ int main(int argc, char* argv[])
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send_data(frame_buff, &frame_buff_cnt, rf_bits);
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fwrite((uint8_t*)frame_buff, SYM_PER_PLD*sizeof(float), 1, stdout);
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/*printf("DST: ");
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for(uint8_t i=0; i<6; i++)
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printf("%02X", lsf.dst[i]);
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printf(" SRC: ");
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for(uint8_t i=0; i<6; i++)
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printf("%02X", lsf.src[i]);
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printf(" TYPE: ");
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for(uint8_t i=0; i<2; i++)
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printf("%02X", lsf.type[i]);
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printf(" META: ");
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for(uint8_t i=0; i<14; i++)
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printf("%02X", lsf.meta[i]);
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printf(" CRC: ");
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for(uint8_t i=0; i<2; i++)
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printf("%02X", lsf.crc[i]);
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printf("\n");*/
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}
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//check the SIGNED STREAM flag
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signed_str=(lsf.type[0]>>3)&1;
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if(finished)
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//set the flag
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got_lsf=1;
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}
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//check if theres any more data
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if(fread(&(next_lsf.dst), 6, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.src), 6, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.type), 2, 1, stdin)<1) finished=1;
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if(fread(&(next_lsf.meta), 14, 1, stdin)<1) finished=1;
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if(fread(next_data, 16, 1, stdin)<1) finished=1;
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if(!finished)
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{
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//debug payload dump
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/*fprintf(stderr, "ENC-Payload %04X: ", fn);
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for(uint8_t i=0; i<sizeof(digest); i++)
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fprintf(stderr, "%02X", data[i]);
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fprintf(stderr, "\n");*/
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//send frame
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frame_buff_cnt=0;
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send_syncword(frame_buff, &frame_buff_cnt, SYNC_STR);
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extract_LICH(lich, lich_cnt, &lsf);
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encode_LICH(lich_encoded, lich);
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unpack_LICH(enc_bits, lich_encoded);
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conv_encode_stream_frame(&enc_bits[96], data, fn);
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reorder_bits(rf_bits, enc_bits);
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randomize_bits(rf_bits);
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send_data(frame_buff, &frame_buff_cnt, rf_bits);
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fwrite((uint8_t*)frame_buff, SYM_PER_FRA*sizeof(float), 1, stdout);
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fn = (fn + 1) % 0x8000; //increment FN
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lich_cnt = (lich_cnt + 1) % 6; //continue with next LICH_CNT
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//update the stream digest if required
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if(signed_str)
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{
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for(uint8_t i=0; i<sizeof(digest); i++)
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digest[i]^=data[i];
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uint8_t tmp=digest[0];
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for(uint8_t i=0; i<sizeof(digest)-1; i++)
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digest[i]=digest[i+1];
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digest[sizeof(digest)-1]=tmp;
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}
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//update LSF every 6 frames (superframe boundary)
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if(fn>0 && lich_cnt==0)
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{
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lsf = next_lsf;
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//calculate LSF CRC
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uint16_t ccrc=LSF_CRC(&lsf);
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lsf.crc[0]=ccrc>>8;
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lsf.crc[1]=ccrc&0xFF;
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}
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memcpy(data, next_data, 16);
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}
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else //send last frame(s)
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{
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//debug data dump
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/*fprintf(stderr, "ENC-Payload %04X: ", fn);
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for(uint8_t i=0; i<sizeof(digest); i++)
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fprintf(stderr, "%02X", data[i]);
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fprintf(stderr, "\n");*/
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//send frame
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frame_buff_cnt=0;
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send_syncword(frame_buff, &frame_buff_cnt, SYNC_STR);
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extract_LICH(lich, lich_cnt, &lsf);
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encode_LICH(lich_encoded, lich);
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unpack_LICH(enc_bits, lich_encoded);
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if(!signed_str)
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conv_encode_stream_frame(&enc_bits[96], data, (fn | 0x8000));
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else
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conv_encode_stream_frame(&enc_bits[96], data, fn);
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reorder_bits(rf_bits, enc_bits);
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randomize_bits(rf_bits);
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send_data(frame_buff, &frame_buff_cnt, rf_bits);
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fwrite((uint8_t*)frame_buff, SYM_PER_FRA*sizeof(float), 1, stdout);
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//if we are done, and the stream is signed, so we need to transmit the signature (4 frames)
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if(signed_str)
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{
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//update digest
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for(uint8_t i=0; i<sizeof(digest); i++)
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digest[i]^=data[i];
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uint8_t tmp=digest[0];
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for(uint8_t i=0; i<sizeof(digest)-1; i++)
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digest[i]=digest[i+1];
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digest[sizeof(digest)-1]=tmp;
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//sign the digest
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uECC_sign(priv_key, digest, sizeof(digest), sig, curve);
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//4 frames with 512-bit signature
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fn = 0x7FFC; //signature has to start at 0x7FFC to end at 0x7FFF (0xFFFF with EoT marker set)
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for(uint8_t i=0; i<4; i++)
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{
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//dump payload
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/*fprintf(stderr, "ENC-Payload %04X: ", fn);
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for(uint8_t i=0; i<sizeof(digest); i++)
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fprintf(stderr, "%02X", data[i]);
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fprintf(stderr, "\n");*/
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frame_buff_cnt=0;
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send_syncword(frame_buff, &frame_buff_cnt, SYNC_STR);
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extract_LICH(lich, lich_cnt, &lsf);
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encode_LICH(lich_encoded, lich);
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unpack_LICH(enc_bits, lich_encoded);
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conv_encode_stream_frame(&enc_bits[96], &sig[i*16], fn);
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reorder_bits(rf_bits, enc_bits);
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randomize_bits(rf_bits);
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send_data(frame_buff, &frame_buff_cnt, rf_bits);
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fwrite((uint8_t*)frame_buff, SYM_PER_FRA*sizeof(float), 1, stdout);
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fn = (fn<0x7FFE) ? fn+1 : (0x7FFF|0x8000);
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lich_cnt = (lich_cnt + 1) % 6; //continue with next LICH_CNT
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}
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//dump data
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/*fprintf(stderr, "ENC-Digest: ");
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for(uint8_t i=0; i<sizeof(digest); i++)
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fprintf(stderr, "%02X", digest[i]);
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fprintf(stderr, "\n");
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fprintf(stderr, "Key: ");
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for(uint8_t i=0; i<sizeof(priv_key); i++)
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fprintf(stderr, "%02X", priv_key[i]);
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fprintf(stderr, "\n");
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fprintf(stderr, "Signature: ");
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for(uint8_t i=0; i<sizeof(sig); i++)
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fprintf(stderr, "%02X", sig[i]);
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fprintf(stderr, "\n");*/
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}
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//send EOT frame
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frame_buff_cnt=0;
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send_eot(frame_buff, &frame_buff_cnt);
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fwrite((uint8_t*)frame_buff, SYM_PER_PLD*sizeof(float), 1, stdout);
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//fprintf(stderr, "Stream has ended. Exiting.\n");
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}
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}
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