diff options
Diffstat (limited to 'extensions/libipt_SNAT.c')
| -rw-r--r-- | extensions/libipt_SNAT.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/extensions/libipt_SNAT.c b/extensions/libipt_SNAT.c index 78d2c2b1..42fe92de 100644 --- a/extensions/libipt_SNAT.c +++ b/extensions/libipt_SNAT.c @@ -252,6 +252,58 @@ static void SNAT_save(const void *ip, const struct xt_entry_target *target) } } +static void print_range_xlate(const struct nf_nat_ipv4_range *r, + struct xt_buf *buf) +{ + if (r->flags & NF_NAT_RANGE_MAP_IPS) { + struct in_addr a; + + a.s_addr = r->min_ip; + xt_buf_add(buf, "%s", xtables_ipaddr_to_numeric(&a)); + if (r->max_ip != r->min_ip) { + a.s_addr = r->max_ip; + xt_buf_add(buf, "-%s", xtables_ipaddr_to_numeric(&a)); + } + } + if (r->flags & NF_NAT_RANGE_PROTO_SPECIFIED) { + xt_buf_add(buf, ":"); + xt_buf_add(buf, "%hu", ntohs(r->min.tcp.port)); + if (r->max.tcp.port != r->min.tcp.port) + xt_buf_add(buf, "-%hu", ntohs(r->max.tcp.port)); + } +} + +static int SNAT_xlate(const struct xt_entry_target *target, + struct xt_buf *buf, int numeric) +{ + const struct ipt_natinfo *info = (const void *)target; + unsigned int i = 0; + bool sep_need = false; + const char *sep = " "; + + for (i = 0; i < info->mr.rangesize; i++) { + xt_buf_add(buf, "snat "); + print_range_xlate(&info->mr.range[i], buf); + if (info->mr.range[i].flags & NF_NAT_RANGE_PROTO_RANDOM) { + xt_buf_add(buf, " random"); + sep_need = true; + } + if (info->mr.range[i].flags & NF_NAT_RANGE_PROTO_RANDOM_FULLY) { + if (sep_need) + sep = ","; + xt_buf_add(buf, "%sfully-random", sep); + sep_need = true; + } + if (info->mr.range[i].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 = "SNAT", .version = XTABLES_VERSION, @@ -264,6 +316,7 @@ static struct xtables_target snat_tg_reg = { .print = SNAT_print, .save = SNAT_save, .x6_options = SNAT_opts, + .xlate = SNAT_xlate, }; void _init(void) |