Function raw_capture_rcv_loop

modules/sipcapture/sipcapture.c:4940–5066

Local raw receive loop */

/* Local raw receive loop */
int raw_capture_rcv_loop(int rsock, int port1, int port2, int ipip) {


	static char buf [BUF_SIZE+1];
	union sockaddr_union from;
	union sockaddr_union to;
	int len;
	struct ip *iph;
	struct udphdr *udph;
	char* udph_start;
	unsigned short udp_len;
	int offset = 0;
	char* end;
	unsigned short dst_port;
	unsigned short src_port;
	struct ip_addr dst_ip, src_ip;
	struct ipc_msg_pack *ipc_pack;


	for(;;) {

		len = recvfrom(rsock, buf, BUF_SIZE, 0, 0, 0);

		if (len<0){
			if (len==-1){
				LM_ERR("recvfrom: %s [%d]\n",
						strerror(errno), errno);
				if ((errno==EINTR)||(errno==EWOULDBLOCK))
					continue;
				else goto error;
			}else{
				LM_DBG("recvfrom error: %d\n", len);
				continue;
			}
		}

		end=buf+len;

		offset =  ipip ? sizeof(struct ip) : ETHHDR;

		if (len < (sizeof(struct ip)+sizeof(struct udphdr) + offset)) {
			LM_DBG("received small packet: %d. Ignore it\n",len);
			continue;
		}

		iph = (struct ip*) (buf + offset);

		offset+=iph->ip_hl*4;

		udph_start = buf+offset;

		udph = (struct udphdr*) udph_start;
		offset +=sizeof(struct udphdr);

		if ((buf+offset)>end){
			continue;
		}