NikolajDanger/Compsys-2021-Assignments
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Nikolaj
2021-11-08 16:43:55 +01:00
parent 84fbccb94d
commit c367c20cdf
3 changed files with 124461 additions and 5 deletions
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A3/src/cascade
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9
A3/src/cascade.c
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@ -147,6 +147,8 @@ void download_only_peer(char *cascade_file)
{ {
get_block(queue[i], peer, hash_buf, output_file); get_block(queue[i], peer, hash_buf, output_file);
} }
// TODO test if everything is all right
printf("\n"); printf("\n");
free_resources(); free_resources();
@ -414,14 +416,11 @@ void get_block(csc_block_t* block, csc_peer_t peer, unsigned char* hash, char* o
return NULL; return NULL;
} }
unsigned char block_data[msglen];
memcpy(block_data,&rio_buf[PEER_RESPONSE_HEADER_SIZE],msglen);
uint8_t shabuffer[SHA256_HASH_SIZE]; uint8_t shabuffer[SHA256_HASH_SIZE];
SHA256_CTX shactx; SHA256_CTX shactx;
sha256_init(&shactx); sha256_init(&shactx);
sha256_update(&shactx, block_data, msglen); sha256_update(&shactx, &rio_buf[PEER_RESPONSE_HEADER_SIZE], msglen);
sha256_final(&shactx, &shabuffer); sha256_final(&shactx, &shabuffer);
if (memcmp(shabuffer, (&block->hash)->x, SHA256_HASH_SIZE) != 0) { if (memcmp(shabuffer, (&block->hash)->x, SHA256_HASH_SIZE) != 0) {
@ -439,7 +438,7 @@ void get_block(csc_block_t* block, csc_peer_t peer, unsigned char* hash, char* o
} }
fseek(fp, block->offset, SEEK_SET); fseek(fp, block->offset, SEEK_SET);
fputs(block_data,fp); fputs(&rio_buf[0,PEER_RESPONSE_HEADER_SIZE],fp);
printf("Got block %d. Wrote from %d to %d\n", block->index, block->offset, block->offset+msglen-1); printf("Got block %d. Wrote from %d to %d\n", block->index, block->offset, block->offset+msglen-1);
Close(peer_socket); Close(peer_socket);

124457
A3/src/tests/shakespeare.10mib.txt
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