diff options
Diffstat (limited to 'extensions/libipt_REDIRECT.c')
| -rw-r--r-- | extensions/libipt_REDIRECT.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/extensions/libipt_REDIRECT.c b/extensions/libipt_REDIRECT.c index c94bb59..6b38716 100644 --- a/extensions/libipt_REDIRECT.c +++ b/extensions/libipt_REDIRECT.c @@ -8,6 +8,9 @@ #include <linux/netfilter_ipv4/ip_tables.h> #include <linux/netfilter/nf_nat.h> +#define IPT_REDIRECT_OPT_DEST 0x01 +#define IPT_REDIRECT_OPT_RANDOM 0x02 + /* Function which prints out usage message. */ static void help(void) @@ -21,6 +24,7 @@ IPTABLES_VERSION); static struct option opts[] = { { "to-ports", 1, 0, '1' }, + { "random", 1, 0, '2' }, { 0 } }; @@ -101,6 +105,17 @@ parse(int c, char **argv, int invert, unsigned int *flags, "Unexpected `!' after --to-ports"); parse_ports(optarg, mr); + if (*flags & IPT_REDIRECT_OPT_RANDOM) + mr->range[0].flags |= IP_NAT_RANGE_PROTO_RANDOM; + *flags |= IPT_REDIRECT_OPT_DEST; + return 1; + + case '2': + if (*flags & IPT_REDIRECT_OPT_DEST) { + mr->range[0].flags |= IP_NAT_RANGE_PROTO_RANDOM; + *flags |= IPT_REDIRECT_OPT_RANDOM; + } else + *flags |= IPT_REDIRECT_OPT_RANDOM; return 1; default: @@ -129,6 +144,8 @@ print(const struct ipt_ip *ip, if (r->max.tcp.port != r->min.tcp.port) printf("-%hu", ntohs(r->max.tcp.port)); printf(" "); + if (mr->range[0].flags & IP_NAT_RANGE_PROTO_RANDOM) + printf("random "); } } @@ -146,6 +163,8 @@ save(const struct ipt_ip *ip, const struct ipt_entry_target *target) if (r->max.tcp.port != r->min.tcp.port) printf("-%hu", ntohs(r->max.tcp.port)); printf(" "); + if (mr->range[0].flags & IP_NAT_RANGE_PROTO_RANDOM) + printf("--random "); } } |