int
tcp_parse(const tcp_head_t* tcp, uint32_t sip, uint32_t dip, uint16_t tcpbytes) {
int ret;
// tcp checksum
if (is_local_address(sip)) {
ret = _tcp_checksum(tcp, sip, dip, tcpbytes);
if (ret < 0) { return ret; }
}
// tcp head option
ret = _tcp_head_option(tcp, sip, dip);
if (ret < 0) { return ret; }
// tcpp link
link_key_t key;
link_key_init(&key, sip, dip, ntohs(tcp->sport), ntohs(tcp->dport));
struct link_value_t* val = link_find_insert(&key, is_local_address(sip));
if (!val) return GAZE_TCP_LINK_FAIL;
// tcp flag
ret = _tcp_flag(tcp, &key, val, tcpbytes);
if (ret < 0) { return ret; }
// tcp finish
ret = link_value_is_finish(val);
if (ret == 0) {
link_erase(&key);
}
PRINTF("\n\n");
return GAZE_OK;
}
static void restor_hanlder(void) {
sigaction(SIGALRM, &old_act, NULL);
sigprocmask(SIG_SETMASK, &old_mask, NULL);
link_erase(tim_link);
free(num_bit);
pthread_mutex_destroy(&mut_init);
pthread_mutex_destroy(&mut_numb);
}
