diff options
| -rw-r--r-- | extensions/libebt_redirect.c | 109 | ||||
| -rw-r--r-- | iptables/xtables-eb.c | 1 |
2 files changed, 110 insertions, 0 deletions
diff --git a/extensions/libebt_redirect.c b/extensions/libebt_redirect.c new file mode 100644 index 00000000..a88713d3 --- /dev/null +++ b/extensions/libebt_redirect.c @@ -0,0 +1,109 @@ +/* ebt_redirect + * + * Authors: + * Bart De Schuymer <bdschuym@pandora.be> + * + * April, 2002 + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <xtables.h> +#include <linux/netfilter_bridge/ebt_redirect.h> +#include "iptables/nft.h" +#include "iptables/nft-bridge.h" + +#define REDIRECT_TARGET '1' +static const struct option brredir_opts[] = +{ + { "redirect-target", required_argument, 0, REDIRECT_TARGET }, + { 0 } +}; + +static void brredir_print_help(void) +{ + printf( + "redirect option:\n" + " --redirect-target target : ACCEPT, DROP, RETURN or CONTINUE\n"); +} + +static void brredir_init(struct xt_entry_target *target) +{ + struct ebt_redirect_info *redirectinfo = + (struct ebt_redirect_info *)target->data; + + redirectinfo->target = EBT_ACCEPT; +} + +#define OPT_REDIRECT_TARGET 0x01 +static int brredir_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_target **target) +{ + struct ebt_redirect_info *redirectinfo = + (struct ebt_redirect_info *)(*target)->data; + + switch (c) { + case REDIRECT_TARGET: + EBT_CHECK_OPTION(flags, OPT_REDIRECT_TARGET); + if (ebt_fill_target(optarg, (unsigned int *)&redirectinfo->target)) + xtables_error(PARAMETER_PROBLEM, "Illegal --redirect-target target"); + break; + default: + return 0; + } + return 1; +} + +static void brredir_print(const void *ip, const struct xt_entry_target *target, int numeric) +{ + struct ebt_redirect_info *redirectinfo = + (struct ebt_redirect_info *)target->data; + + if (redirectinfo->target == EBT_ACCEPT) + return; + printf(" --redirect-target %s", ebt_target_name(redirectinfo->target)); +} + +static const char* brredir_verdict(int verdict) +{ + switch (verdict) { + case EBT_ACCEPT: return "accept"; + case EBT_DROP: return "drop"; + case EBT_CONTINUE: return "continue"; + case EBT_RETURN: return "return"; + } + + return ""; +} + +static int brredir_xlate(struct xt_xlate *xl, + const struct xt_xlate_tg_params *params) +{ + const struct ebt_redirect_info *red = (const void*)params->target->data; + + xt_xlate_add(xl, "meta set pkttype host"); + if (red->target != EBT_ACCEPT) + xt_xlate_add(xl, " %s ", brredir_verdict(red->target)); + return 0; +} + +static struct xtables_target brredirect_target = { + .name = "redirect", + .version = XTABLES_VERSION, + .family = NFPROTO_BRIDGE, + .size = XT_ALIGN(sizeof(struct ebt_redirect_info)), + .userspacesize = XT_ALIGN(sizeof(struct ebt_redirect_info)), + .help = brredir_print_help, + .init = brredir_init, + .parse = brredir_parse, + .print = brredir_print, + .xlate = brredir_xlate, + .extra_opts = brredir_opts, +}; + +void _init(void) +{ + xtables_register_target(&brredirect_target); +} diff --git a/iptables/xtables-eb.c b/iptables/xtables-eb.c index a72c9073..1230125f 100644 --- a/iptables/xtables-eb.c +++ b/iptables/xtables-eb.c @@ -678,6 +678,7 @@ void ebt_load_match_extensions(void) ebt_load_target("mark"); ebt_load_target("dnat"); ebt_load_target("snat"); + ebt_load_target("redirect"); } void ebt_add_match(struct xtables_match *m, |