/* 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);
}
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);
}
}