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-rw-r--r--extensions/libebt_mark.c191
-rw-r--r--include/linux/netfilter_bridge/ebt_mark_t.h23
2 files changed, 214 insertions, 0 deletions
diff --git a/extensions/libebt_mark.c b/extensions/libebt_mark.c
new file mode 100644
index 00000000..587b4a63
--- /dev/null
+++ b/extensions/libebt_mark.c
@@ -0,0 +1,191 @@
+/* ebt_mark
+ *
+ * Authors:
+ * Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * July, 2002, September 2006
+ *
+ * Adapted by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
+ * to use libxtables for ebtables-compat in 2015.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <xtables.h>
+#include <linux/netfilter_bridge/ebt_mark_t.h>
+#include "iptables/nft.h"
+#include "iptables/nft-bridge.h"
+
+static int mark_supplied;
+
+#define MARK_TARGET '1'
+#define MARK_SETMARK '2'
+#define MARK_ORMARK '3'
+#define MARK_ANDMARK '4'
+#define MARK_XORMARK '5'
+static struct option brmark_opts[] = {
+ { .name = "mark-target",.has_arg = true, .val = MARK_TARGET },
+ /* an oldtime messup, we should have always used the scheme
+ * <extension-name>-<option> */
+ { .name = "set-mark", .has_arg = true, .val = MARK_SETMARK },
+ { .name = "mark-set", .has_arg = true, .val = MARK_SETMARK },
+ { .name = "mark-or", .has_arg = true, .val = MARK_ORMARK },
+ { .name = "mark-and", .has_arg = true, .val = MARK_ANDMARK },
+ { .name = "mark-xor", .has_arg = true, .val = MARK_XORMARK },
+ XT_GETOPT_TABLEEND,
+};
+
+static void brmark_print_help(void)
+{
+ printf(
+ "mark target options:\n"
+ " --mark-set value : Set nfmark value\n"
+ " --mark-or value : Or nfmark with value (nfmark |= value)\n"
+ " --mark-and value : And nfmark with value (nfmark &= value)\n"
+ " --mark-xor value : Xor nfmark with value (nfmark ^= value)\n"
+ " --mark-target target : ACCEPT, DROP, RETURN or CONTINUE\n");
+}
+
+static void brmark_init(struct xt_entry_target *target)
+{
+ struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
+
+ info->target = EBT_ACCEPT;
+ info->mark = 0;
+ mark_supplied = 0;
+}
+
+#define OPT_MARK_TARGET 0x01
+#define OPT_MARK_SETMARK 0x02
+#define OPT_MARK_ORMARK 0x04
+#define OPT_MARK_ANDMARK 0x08
+#define OPT_MARK_XORMARK 0x10
+
+static int
+brmark_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_target **target)
+{
+ struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)
+ (*target)->data;
+ char *end;
+ uint32_t mask;
+
+ switch (c) {
+ case MARK_TARGET:
+ { unsigned int tmp;
+ EBT_CHECK_OPTION(flags, OPT_MARK_TARGET);
+ if (ebt_fill_target(optarg, &tmp))
+ xtables_error(PARAMETER_PROBLEM,
+ "Illegal --mark-target target");
+ /* the 4 lsb are left to designate the target */
+ info->target = (info->target & ~EBT_VERDICT_BITS) |
+ (tmp & EBT_VERDICT_BITS);
+ }
+ return 1;
+ case MARK_SETMARK:
+ EBT_CHECK_OPTION(flags, OPT_MARK_SETMARK);
+ mask = (OPT_MARK_ORMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK);
+ if (*flags & mask)
+ xtables_error(PARAMETER_PROBLEM,
+ "--mark-set cannot be used together with"
+ " specific --mark option");
+ info->target = (info->target & EBT_VERDICT_BITS) |
+ MARK_SET_VALUE;
+ break;
+ case MARK_ORMARK:
+ EBT_CHECK_OPTION(flags, OPT_MARK_ORMARK);
+ mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_XORMARK);
+ if (*flags & mask)
+ xtables_error(PARAMETER_PROBLEM,
+ "--mark-or cannot be used together with"
+ " specific --mark option");
+ info->target = (info->target & EBT_VERDICT_BITS) |
+ MARK_OR_VALUE;
+ break;
+ case MARK_ANDMARK:
+ EBT_CHECK_OPTION(flags, OPT_MARK_ANDMARK);
+ mask = (OPT_MARK_SETMARK|OPT_MARK_ORMARK|OPT_MARK_XORMARK);
+ if (*flags & mask)
+ xtables_error(PARAMETER_PROBLEM,
+ "--mark-and cannot be used together with"
+ " specific --mark option");
+ info->target = (info->target & EBT_VERDICT_BITS) |
+ MARK_AND_VALUE;
+ break;
+ case MARK_XORMARK:
+ EBT_CHECK_OPTION(flags, OPT_MARK_XORMARK);
+ mask = (OPT_MARK_SETMARK|OPT_MARK_ANDMARK|OPT_MARK_ORMARK);
+ if (*flags & mask)
+ xtables_error(PARAMETER_PROBLEM,
+ "--mark-xor cannot be used together with"
+ " specific --mark option");
+ info->target = (info->target & EBT_VERDICT_BITS) |
+ MARK_XOR_VALUE;
+ break;
+ default:
+ return 0;
+ }
+ /* mutual code */
+ info->mark = strtoul(optarg, &end, 0);
+ if (*end != '\0' || end == optarg)
+ xtables_error(PARAMETER_PROBLEM, "Bad MARK value '%s'",
+ optarg);
+
+ mark_supplied = 1;
+ return 1;
+}
+
+static void brmark_print(const void *ip, const struct xt_entry_target *target,
+ int numeric)
+{
+ struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)target->data;
+ int tmp;
+
+ tmp = info->target & ~EBT_VERDICT_BITS;
+ if (tmp == MARK_SET_VALUE)
+ printf("--mark-set");
+ else if (tmp == MARK_OR_VALUE)
+ printf("--mark-or");
+ else if (tmp == MARK_XOR_VALUE)
+ printf("--mark-xor");
+ else if (tmp == MARK_AND_VALUE)
+ printf("--mark-and");
+ else
+ xtables_error(PARAMETER_PROBLEM, "Unknown mark action");
+
+ printf(" 0x%lx", info->mark);
+ tmp = info->target | ~EBT_VERDICT_BITS;
+ printf(" --mark-target %s", ebt_target_name(tmp));
+}
+
+static void brmark_final_check(unsigned int flags)
+{
+ if (mark_supplied == 0)
+ xtables_error(PARAMETER_PROBLEM, "No mark value supplied");
+
+ if (!flags)
+ xtables_error(PARAMETER_PROBLEM,
+ "You must specify some option");
+}
+
+static struct xtables_target brmark_target = {
+ .name = "mark",
+ .revision = 0,
+ .version = XTABLES_VERSION,
+ .family = NFPROTO_BRIDGE,
+ .size = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct ebt_mark_t_info)),
+ .help = brmark_print_help,
+ .init = brmark_init,
+ .parse = brmark_parse,
+ .final_check = brmark_final_check,
+ .print = brmark_print,
+ .extra_opts = brmark_opts,
+};
+
+void _init(void)
+{
+ xtables_register_target(&brmark_target);
+}
diff --git a/include/linux/netfilter_bridge/ebt_mark_t.h b/include/linux/netfilter_bridge/ebt_mark_t.h
new file mode 100644
index 00000000..7d5a268a
--- /dev/null
+++ b/include/linux/netfilter_bridge/ebt_mark_t.h
@@ -0,0 +1,23 @@
+#ifndef __LINUX_BRIDGE_EBT_MARK_T_H
+#define __LINUX_BRIDGE_EBT_MARK_T_H
+
+/* The target member is reused for adding new actions, the
+ * value of the real target is -1 to -NUM_STANDARD_TARGETS.
+ * For backward compatibility, the 4 lsb (2 would be enough,
+ * but let's play it safe) are kept to designate this target.
+ * The remaining bits designate the action. By making the set
+ * action 0xfffffff0, the result will look ok for older
+ * versions. [September 2006] */
+#define MARK_SET_VALUE (0xfffffff0)
+#define MARK_OR_VALUE (0xffffffe0)
+#define MARK_AND_VALUE (0xffffffd0)
+#define MARK_XOR_VALUE (0xffffffc0)
+
+struct ebt_mark_t_info {
+ unsigned long mark;
+ /* EBT_ACCEPT, EBT_DROP, EBT_CONTINUE or EBT_RETURN */
+ int target;
+};
+#define EBT_MARK_TARGET "mark"
+
+#endif