struct packet *packet_deserialize(unsigned char *buf, int len) {
if (len < 11) return NULL;
struct packet *ret = malloc(sizeof(struct packet));
ret->family = *buf;
ret->unk1 = *(buf+1);
ret->dir = *(buf+2);
ret->pltype = *(buf+3);
ret->connid = ntohs(*(unsigned short *)(buf+4));
ret->subseq = *(buf+6);
ret->unk2 = *(buf+7);
ret->sessid = ntohs(*(unsigned short *)(buf+8));
ret->tail = *(buf+10);
ret->data = NULL;
ret->rawdata = NULL;
ret->rawdatalen = 0;
if (len > 11) {
// try to deserialize inner block
ret->data = block_deserialize(buf+11, len-11, NULL);
if (!ret->data) {
// failed, save as raw data
ret->rawdata = malloc(len-11);
memcpy(ret->rawdata, buf+11, len-11);
ret->rawdatalen = len-11;
}
}
return ret;
}
/* Read a block from a file pointer. Returns 1 for success; 0 for failure. */
int block_read(struct block *b, FILE *fp)
{
unsigned char buf[SERIALIZED_BLOCK_LEN];
int n;
n = fread(buf, sizeof(buf), 1, fp);
if (n != 1)
return 0;
block_deserialize(b, buf);
return 1;
}