static void
pcap_pack_callback(unsigned char *args, const struct pcap_pkthdr *pkt_hdr,
unsigned char *frame)
{
int l2_len;
pcap_t *pcap;
unsigned char *ip_data;
if (pkt_hdr->len >= ETHERNET_HDR_LEN) {
pcap = (pcap_t *) args;
ip_data = get_ip_data(pcap, frame, pkt_hdr->len, &l2_len);
resp_dispose((tc_iph_t *) ip_data);
} else {
tc_log_info(LOG_ERR, 0, "recv len is less than:%d", ETHERNET_HDR_LEN);
}
}
static void
pcap_packet_callback(unsigned char *args, const struct pcap_pkthdr *pkt_hdr,
unsigned char *packet)
{
pcap_t *pcap;
unsigned char *ip_data;
int l2_len;
if (pkt_hdr->len < ETHERNET_HDR_LEN) {
tc_log_info(LOG_ERR, 0, "recv len is less than:%d", ETHERNET_HDR_LEN);
return;
}
pcap = (pcap_t *)args;
ip_data = get_ip_data(pcap, packet, pkt_hdr->len, &l2_len);
resp_dispose((tc_ip_header_t *) ip_data);
}
static int
tc_process_resp_packet(tc_event_t *rev)
{
#if (TCPCOPY_PCAP)
pcap_t *pcap;
#else
int recv_len;
char recv_buf[RESP_RECV_BUF_SIZE];
tc_ip_header_t *ip_header;
#endif
#if (TCPCOPY_PCAP)
pcap = pcap_map[rev->fd];
pcap_dispatch(pcap, 1,(pcap_handler) pcap_packet_callback, (u_char *) pcap);
#else
recv_len = recvfrom(rev->fd, recv_buf,
RESP_RECV_BUF_SIZE, 0, NULL, NULL);
if (recv_len == -1) {
if (errno == EAGAIN) {
return TC_OK;
}
tc_log_info(LOG_ERR, errno, "recvfrom");
return TC_ERROR;
}
if (recv_len < 40) {
tc_log_info(LOG_ERR, 0, "recv len is less than 40:%d", recv_len);
return TC_ERROR;
}
ip_header = (tc_ip_header_t *) (char *) (recv_buf);
resp_dispose(ip_header);
#endif
return TC_OK;
}
