@@ -9,23 +9,27 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <getopt.h>
#include <netinet/ether.h>
#include <xtables.h>
#include <linux/netfilter_bridge/ebt_nat.h>
#include "iptables/nft.h"
#include "iptables/nft-bridge.h"
-#define NAT_S '1'
-#define NAT_S_TARGET '2'
-#define NAT_S_ARP '3'
-static const struct option brsnat_opts[] =
+enum {
+ O_SRC,
+ O_TARGET,
+ O_ARP,
+};
+
+static const struct xt_option_entry brsnat_opts[] =
{
- { "to-source" , required_argument, 0, NAT_S },
- { "to-src" , required_argument, 0, NAT_S },
- { "snat-target" , required_argument, 0, NAT_S_TARGET },
- { "snat-arp" , no_argument, 0, NAT_S_ARP },
- { 0 }
+ { .name = "to-source", .id = O_SRC, .type = XTTYPE_ETHERMAC,
+ .flags = XTOPT_PUT, XTOPT_POINTER(struct ebt_nat_info, mac) },
+ { .name = "to-src", .id = O_SRC, .type = XTTYPE_ETHERMAC,
+ .flags = XTOPT_PUT, XTOPT_POINTER(struct ebt_nat_info, mac) },
+ { .name = "snat-target", .id = O_TARGET, .type = XTTYPE_STRING },
+ { .name = "snat-arp", .id = O_ARP, .type = XTTYPE_NONE },
+ XTOPT_TABLEEND,
};
static void brsnat_print_help(void)
@@ -44,43 +48,29 @@ static void brsnat_init(struct xt_entry_target *target)
natinfo->target = EBT_ACCEPT;
}
-#define OPT_SNAT 0x01
-#define OPT_SNAT_TARGET 0x02
-#define OPT_SNAT_ARP 0x04
-static int brsnat_parse(int c, char **argv, int invert, unsigned int *flags,
- const void *entry, struct xt_entry_target **target)
+static void brsnat_parse(struct xt_option_call *cb)
{
- struct ebt_nat_info *natinfo = (struct ebt_nat_info *)(*target)->data;
- struct ether_addr *addr;
-
- switch (c) {
- case NAT_S:
- EBT_CHECK_OPTION(flags, OPT_SNAT);
- if (!(addr = ether_aton(optarg)))
- xtables_error(PARAMETER_PROBLEM, "Problem with specified --to-source mac");
- memcpy(natinfo->mac, addr, ETH_ALEN);
- break;
- case NAT_S_TARGET:
- { unsigned int tmp;
- EBT_CHECK_OPTION(flags, OPT_SNAT_TARGET);
- if (ebt_fill_target(optarg, &tmp))
- xtables_error(PARAMETER_PROBLEM, "Illegal --snat-target target");
- natinfo->target = (natinfo->target & ~EBT_VERDICT_BITS) | (tmp & EBT_VERDICT_BITS);
- }
+ struct ebt_nat_info *natinfo = cb->data;
+ unsigned int tmp;
+
+ xtables_option_parse(cb);
+ switch (cb->entry->id) {
+ case O_TARGET:
+ if (ebt_fill_target(cb->arg, &tmp))
+ xtables_error(PARAMETER_PROBLEM,
+ "Illegal --snat-target target");
+ natinfo->target &= ~EBT_VERDICT_BITS;
+ natinfo->target |= tmp & EBT_VERDICT_BITS;
break;
- case NAT_S_ARP:
- EBT_CHECK_OPTION(flags, OPT_SNAT_ARP);
+ case O_ARP:
natinfo->target ^= NAT_ARP_BIT;
break;
- default:
- return 0;
}
- return 1;
}
-static void brsnat_final_check(unsigned int flags)
+static void brsnat_final_check(struct xt_fcheck_call *fc)
{
- if (!flags)
+ if (!fc->xflags)
xtables_error(PARAMETER_PROBLEM,
"You must specify proper arguments");
}
@@ -133,11 +123,11 @@ static struct xtables_target brsnat_target =
.userspacesize = XT_ALIGN(sizeof(struct ebt_nat_info)),
.help = brsnat_print_help,
.init = brsnat_init,
- .parse = brsnat_parse,
- .final_check = brsnat_final_check,
+ .x6_parse = brsnat_parse,
+ .x6_fcheck = brsnat_final_check,
.print = brsnat_print,
.xlate = brsnat_xlate,
- .extra_opts = brsnat_opts,
+ .x6_options = brsnat_opts,
};
void _init(void)
@@ -2,3 +2,5 @@
*nat
-o someport -j snat --to-source a:b:c:d:e:f;-o someport -j snat --to-src 0a:0b:0c:0d:0e:0f --snat-target ACCEPT;OK
-o someport+ -j snat --to-src de:ad:00:be:ee:ff --snat-target CONTINUE;=;OK
+-j snat;;FAIL
+-j snat --to-src de:ad:00:be:ee:ff;-j snat --to-src de:ad:00:be:ee:ff --snat-target ACCEPT;OK
Signed-off-by: Phil Sutter <phil@nwl.cc> --- extensions/libebt_snat.c | 74 +++++++++++++++++----------------------- extensions/libebt_snat.t | 2 ++ 2 files changed, 34 insertions(+), 42 deletions(-)