Exemplo n.º 1
0
/* Parses ports */
static void
parse_ports(const char *arg, struct nf_nat_range *range)
{
	char *end = "";
	unsigned int port, maxport;

	range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;

	if (!xtables_strtoui(arg, &end, &port, 0, UINT16_MAX) &&
	    (port = xtables_service_to_port(arg, NULL)) == (unsigned)-1)
		xtables_param_act(XTF_BAD_VALUE, "REDIRECT", "--to-ports", arg);

	switch (*end) {
	case '\0':
		range->min_proto.tcp.port
			= range->max_proto.tcp.port
			= htons(port);
		return;
	case '-':
		if (!xtables_strtoui(end + 1, NULL, &maxport, 0, UINT16_MAX) &&
		    (maxport = xtables_service_to_port(end + 1, NULL)) == (unsigned)-1)
			break;

		if (maxport < port)
			break;

		range->min_proto.tcp.port = htons(port);
		range->max_proto.tcp.port = htons(maxport);
		return;
	default:
		break;
	}
	xtables_param_act(XTF_BAD_VALUE, "REDIRECT", "--to-ports", arg);
}
Exemplo n.º 2
0
uint16_t xtables_parse_port(const char *port, const char *proto)
{
	unsigned int portnum;

	if (xtables_strtoui(port, NULL, &portnum, 0, UINT16_MAX) ||
	    (portnum = xtables_service_to_port(port, proto)) != (unsigned)-1)
		return portnum;

	xt_params->exit_err(PARAMETER_PROBLEM,
		   "invalid port/service `%s' specified", port);
}
/* Parses ports */
static void
parse_ports(const char *arg, struct nf_nat_multi_range *mr)
{
	const char *dash;
	int port;

	mr->range[0].flags |= IP_NAT_RANGE_PROTO_SPECIFIED;

	if (strchr(arg, '.'))
		xtables_error(PARAMETER_PROBLEM, "IP address not permitted\n");

	port = atoi(arg);
	if (port == 0)
		port = xtables_service_to_port(arg, NULL);

	if (port == 0 || port > 65535)
		xtables_error(PARAMETER_PROBLEM, "Port \"%s\" not valid\n", arg);

	dash = strchr(arg, '-');
	if (!dash) {
		mr->range[0].min.tcp.port
			= mr->range[0].max.tcp.port
			= htons(port);
	} else {
		int maxport;

		maxport = atoi(dash + 1);
		if (maxport == 0 || maxport > 65535)
			xtables_error(PARAMETER_PROBLEM,
				   "Port `%s' not valid\n", dash+1);
		if (maxport < port)
			/* People are stupid. */
			xtables_error(PARAMETER_PROBLEM,
				   "Port range `%s' funky\n", arg);
		mr->range[0].min.tcp.port = htons(port);
		mr->range[0].max.tcp.port = htons(maxport);
	}
}