diff options
Diffstat (limited to 'extensions/libip6t_DNAT.c')
| -rw-r--r-- | extensions/libip6t_DNAT.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/extensions/libip6t_DNAT.c b/extensions/libip6t_DNAT.c index eaa6bf1e..39597558 100644 --- a/extensions/libip6t_DNAT.c +++ b/extensions/libip6t_DNAT.c @@ -231,6 +231,49 @@ static void DNAT_save(const void *ip, const struct xt_entry_target *target) printf(" --persistent"); } +static void print_range_xlate(const struct nf_nat_range *range, + struct xt_buf *buf) +{ + if (range->flags & NF_NAT_RANGE_MAP_IPS) { + xt_buf_add(buf, "%s", + xtables_ip6addr_to_numeric(&range->min_addr.in6)); + + if (memcmp(&range->min_addr, &range->max_addr, + sizeof(range->min_addr))) + xt_buf_add(buf, "-%s", + xtables_ip6addr_to_numeric(&range->max_addr.in6)); + } + if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) { + xt_buf_add(buf, " :%hu", ntohs(range->min_proto.tcp.port)); + + if (range->max_proto.tcp.port != range->min_proto.tcp.port) + xt_buf_add(buf, "-%hu", + ntohs(range->max_proto.tcp.port)); + } +} + +static int DNAT_xlate(const struct xt_entry_target *target, + struct xt_buf *buf, int numeric) +{ + const struct nf_nat_range *range = (const void *)target->data; + bool sep_need = false; + const char *sep = " "; + + xt_buf_add(buf, "dnat "); + print_range_xlate(range, buf); + if (range->flags & NF_NAT_RANGE_PROTO_RANDOM) { + xt_buf_add(buf, " random"); + sep_need = true; + } + if (range->flags & NF_NAT_RANGE_PERSISTENT) { + if (sep_need) + sep = ","; + xt_buf_add(buf, "%spersistent", sep); + } + + return 1; +} + static struct xtables_target snat_tg_reg = { .name = "DNAT", .version = XTABLES_VERSION, @@ -244,6 +287,7 @@ static struct xtables_target snat_tg_reg = { .print = DNAT_print, .save = DNAT_save, .x6_options = DNAT_opts, + .xlate = DNAT_xlate, }; void _init(void) |