Function check_udp_proxy_protocol

net/proxy_protocol.c:482–527

}

int check_udp_proxy_protocol(char **buf, int *size, struct receive_info *ri)
{
	char *p, *msg;
	int len;

	if (!buf || !*buf || !size || !ri)
		return -1;

	ri->real_ep.flags = PP_INIT;

	if (!ri->bind_address || (ri->bind_address->flags & SI_PROXY_IN) == 0)
		return 1;

	msg = *buf;
	len = *size;

	switch (is_net_proxy_protocol(msg, len)) {
	case -1:
	case 0:
		return 1;
	default:
		break;
	}

	p = parse_net_proxy_protocol(msg, len, &ri->real_ep);
	if (!p) {
		if (ri->real_ep.flags == PP_ERROR) {
			LM_ERR("could not parse proxy_protocol header\n");
		} else {
			LM_ERR("incomplete proxy_protocol header in UDP packet\n");
		}
		return -1;
	}

	if (ri->real_ep.flags == PP_OK) {
		LM_DBG("message proxy_protocol %s:%hu -> %s:%hu\n",
				ip_addr2a(&ri->real_ep.src_ip), ri->real_ep.src_port,
				ip_addr2a(&ri->real_ep.dst_ip), ri->real_ep.dst_port);
	} else {
		LM_DBG("message proxy_protocol UNKNOWN\n");
	}

	*size -= p - msg;
	*buf = p;
	return 1;
}