Function do_get3

tools/ipfw/ipfw2.c:648–669

* do_get3 - pass ipfw control cmd to kernel * @optname: option name * @optval: pointer to option data * @optlen: pointer to option length * * Assumes op3 header is already embedded. * Calls getsockopt() with IP_FW3 as kernel-visible opcode. * Returns 0 on success or errno otherwise. */

 * Returns 0 on success or errno otherwise.
 */
int
do_get3(int optname, ip_fw3_opheader *op3, size_t *optlen)
{
	int error;
	socklen_t len;

	if (g_co.test_only)
		return (0);

	if (ipfw_socket == -1)
		ipfw_socket = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
	if (ipfw_socket < 0)
		err(EX_UNAVAILABLE, "socket");

	op3->opcode = optname;

	len = *optlen;
	error = getsockopt(ipfw_socket, IPPROTO_IP, IP_FW3, op3, &len);
	*optlen = len;

	return (error);
}

/**
 * match_token takes a table and a string, returns the value associated