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229 lines
6.1 KiB
229 lines
6.1 KiB
/* ebt_mark
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*
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* Authors:
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* Bart De Schuymer <bdschuym@pandora.be>
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*
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* July, 2002, September 2006
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*
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* Adapted by Arturo Borrero Gonzalez <arturo@debian.org>
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* to use libxtables for ebtables-compat in 2015.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <xtables.h>
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#include <linux/netfilter_bridge/ebt_mark_t.h>
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#include "iptables/nft.h"
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#include "iptables/nft-bridge.h"
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#define MARK_TARGET '1'
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#define MARK_SETMARK '2'
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#define MARK_ORMARK '3'
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#define MARK_ANDMARK '4'
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#define MARK_XORMARK '5'
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static const struct option brmark_opts[] = {
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{ .name = "mark-target",.has_arg = true, .val = MARK_TARGET },
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/* an oldtime messup, we should have always used the scheme
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* <extension-name>-<option> */
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{ .name = "set-mark", .has_arg = true, .val = MARK_SETMARK },
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{ .name = "mark-set", .has_arg = true, .val = MARK_SETMARK },
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{ .name = "mark-or", .has_arg = true, .val = MARK_ORMARK },
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{ .name = "mark-and", .has_arg = true, .val = MARK_ANDMARK },
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{ .name = "mark-xor", .has_arg = true, .val = MARK_XORMARK },
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XT_GETOPT_TABLEEND,
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};
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static void brmark_print_help(void)
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{
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printf(
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"mark target options:\n"
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" --mark-set value : Set nfmark value\n"
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" --mark-or value : Or nfmark with value (nfmark |= value)\n"
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" --mark-and value : And nfmark with value (nfmark &= value)\n"
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" --mark-xor value : Xor nfmark with value (nfmark ^= value)\n"
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" --mark-target target : ACCEPT, DROP, RETURN or CONTINUE\n");
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}
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static void brmark_init(struct xt_entry_target *target)
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{
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struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
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info->target = EBT_ACCEPT;
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info->mark = 0;
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}
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#define OPT_MARK_TARGET 0x01
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#define OPT_MARK_SETMARK 0x02
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#define OPT_MARK_ORMARK 0x04
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#define OPT_MARK_ANDMARK 0x08
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#define OPT_MARK_XORMARK 0x10
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static int
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brmark_parse(int c, char **argv, int invert, unsigned int *flags,
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const void *entry, struct xt_entry_target **target)
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{
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struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)
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(*target)->data;
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char *end;
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uint32_t mask;
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switch (c) {
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case MARK_TARGET:
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{ unsigned int tmp;
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EBT_CHECK_OPTION(flags, OPT_MARK_TARGET);
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if (ebt_fill_target(optarg, &tmp))
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xtables_error(PARAMETER_PROBLEM,
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"Illegal --mark-target target");
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/* the 4 lsb are left to designate the target */
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info->target = (info->target & ~EBT_VERDICT_BITS) |
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(tmp & EBT_VERDICT_BITS);
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}
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return 1;
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case MARK_SETMARK:
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EBT_CHECK_OPTION(flags, OPT_MARK_SETMARK);
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mask = (OPT_MARK_ORMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK);
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if (*flags & mask)
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xtables_error(PARAMETER_PROBLEM,
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"--mark-set cannot be used together with"
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" specific --mark option");
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info->target = (info->target & EBT_VERDICT_BITS) |
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MARK_SET_VALUE;
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break;
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case MARK_ORMARK:
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EBT_CHECK_OPTION(flags, OPT_MARK_ORMARK);
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mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK);
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if (*flags & mask)
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xtables_error(PARAMETER_PROBLEM,
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"--mark-or cannot be used together with"
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" specific --mark option");
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info->target = (info->target & EBT_VERDICT_BITS) |
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MARK_OR_VALUE;
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break;
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case MARK_ANDMARK:
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EBT_CHECK_OPTION(flags, OPT_MARK_ANDMARK);
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mask = (OPT_MARK_SETMARK|OPT_MARK_ORMARK|OPT_MARK_XORMARK);
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if (*flags & mask)
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xtables_error(PARAMETER_PROBLEM,
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"--mark-and cannot be used together with"
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" specific --mark option");
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info->target = (info->target & EBT_VERDICT_BITS) |
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MARK_AND_VALUE;
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break;
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case MARK_XORMARK:
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EBT_CHECK_OPTION(flags, OPT_MARK_XORMARK);
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mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_ORMARK);
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if (*flags & mask)
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xtables_error(PARAMETER_PROBLEM,
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"--mark-xor cannot be used together with"
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" specific --mark option");
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info->target = (info->target & EBT_VERDICT_BITS) |
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MARK_XOR_VALUE;
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break;
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default:
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return 0;
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}
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/* mutual code */
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info->mark = strtoul(optarg, &end, 0);
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if (*end != '\0' || end == optarg)
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xtables_error(PARAMETER_PROBLEM, "Bad MARK value '%s'",
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optarg);
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return 1;
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}
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static void brmark_print(const void *ip, const struct xt_entry_target *target,
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int numeric)
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{
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struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
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int tmp;
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tmp = info->target & ~EBT_VERDICT_BITS;
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if (tmp == MARK_SET_VALUE)
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printf("--mark-set");
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else if (tmp == MARK_OR_VALUE)
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printf("--mark-or");
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else if (tmp == MARK_XOR_VALUE)
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printf("--mark-xor");
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else if (tmp == MARK_AND_VALUE)
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printf("--mark-and");
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else
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xtables_error(PARAMETER_PROBLEM, "Unknown mark action");
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printf(" 0x%lx", info->mark);
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tmp = info->target | ~EBT_VERDICT_BITS;
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printf(" --mark-target %s", ebt_target_name(tmp));
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}
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static void brmark_final_check(unsigned int flags)
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{
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if (!flags)
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xtables_error(PARAMETER_PROBLEM,
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"You must specify some option");
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}
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static const char* brmark_verdict(int verdict)
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{
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switch (verdict) {
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case EBT_ACCEPT: return "accept";
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case EBT_DROP: return "drop";
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case EBT_CONTINUE: return "continue";
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case EBT_RETURN: return "return";
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}
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return "";
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}
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static int brmark_xlate(struct xt_xlate *xl,
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const struct xt_xlate_tg_params *params)
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{
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const struct ebt_mark_t_info *info = (const void*)params->target->data;
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int tmp;
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tmp = info->target & ~EBT_VERDICT_BITS;
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xt_xlate_add(xl, "meta mark set ");
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switch (tmp) {
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case MARK_SET_VALUE:
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break;
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case MARK_OR_VALUE:
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xt_xlate_add(xl, "meta mark or ");
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break;
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case MARK_XOR_VALUE:
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xt_xlate_add(xl, "meta mark xor ");
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break;
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case MARK_AND_VALUE:
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xt_xlate_add(xl, "meta mark and ");
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break;
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default:
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return 0;
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}
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tmp = info->target & EBT_VERDICT_BITS;
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xt_xlate_add(xl, "0x%lx %s ", info->mark, brmark_verdict(tmp));
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return 1;
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}
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static struct xtables_target brmark_target = {
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.name = "mark",
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.revision = 0,
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.version = XTABLES_VERSION,
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.family = NFPROTO_BRIDGE,
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.size = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
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.userspacesize = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
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.help = brmark_print_help,
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.init = brmark_init,
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.parse = brmark_parse,
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.final_check = brmark_final_check,
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.print = brmark_print,
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.xlate = brmark_xlate,
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.extra_opts = brmark_opts,
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};
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void _init(void)
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{
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xtables_register_target(&brmark_target);
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}
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