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-rw-r--r--extensions/libxt_mark.c140
1 files changed, 112 insertions, 28 deletions
diff --git a/extensions/libxt_mark.c b/extensions/libxt_mark.c
index b7f007b5..e7570846 100644
--- a/extensions/libxt_mark.c
+++ b/extensions/libxt_mark.c
@@ -1,4 +1,5 @@
/* Shared library add-on to iptables to add NFMARK matching support. */
+#include <stdbool.h>
#include <stdio.h>
#include <netdb.h>
#include <string.h>
@@ -6,24 +7,53 @@
#include <getopt.h>
#include <xtables.h>
-/* For 64bit kernel / 32bit userspace */
-#include "../include/linux/netfilter/xt_mark.h"
+#include <linux/netfilter/xt_mark.h>
-/* Function which prints out usage message. */
-static void mark_help(void)
+enum {
+ F_MARK = 1 << 0,
+};
+
+static void mark_mt_help(void)
{
printf(
-"MARK match v%s options:\n"
-"[!] --mark value[/mask] Match nfmark value with optional mask\n"
-"\n",
-IPTABLES_VERSION);
+"mark match options:\n"
+"[!] --mark value[/mask] Match nfmark value with optional mask\n"
+"\n");
}
-static const struct option mark_opts[] = {
- { "mark", 1, NULL, '1' },
- { }
+static const struct option mark_mt_opts[] = {
+ {.name = "mark", .has_arg = true, .val = '1'},
+ {},
};
+static int mark_mt_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct xt_mark_mtinfo1 *info = (void *)(*match)->data;
+ unsigned int mark, mask = ~0U;
+ char *end;
+
+ switch (c) {
+ case '1': /* --mark */
+ param_act(P_ONLY_ONCE, "mark", "--mark", *flags & F_MARK);
+ if (!strtonum(optarg, &end, &mark, 0, ~0U))
+ param_act(P_BAD_VALUE, "mark", "--mark", optarg);
+ if (*end == '/')
+ if (!strtonum(end + 1, &end, &mask, 0, ~0U))
+ param_act(P_BAD_VALUE, "mark", "--mark", optarg);
+ if (*end != '\0')
+ param_act(P_BAD_VALUE, "mark", "--mark", optarg);
+
+ if (invert)
+ info->invert = true;
+ info->mark = mark;
+ info->mask = mask;
+ *flags |= F_MARK;
+ return true;
+ }
+ return false;
+}
+
/* Function which parses command options; returns true if it
ate an option */
static int
@@ -54,21 +84,30 @@ mark_parse(int c, char **argv, int invert, unsigned int *flags,
return 1;
}
-static void
-print_mark(unsigned long mark, unsigned long mask, int numeric)
+static void print_mark(unsigned int mark, unsigned int mask)
{
- if(mask != 0xffffffff)
- printf("0x%lx/0x%lx ", mark, mask);
+ if (mask != 0xffffffffU)
+ printf("0x%x/0x%x ", mark, mask);
else
- printf("0x%lx ", mark);
+ printf("0x%x ", mark);
}
-/* Final check; must have specified --mark. */
-static void mark_check(unsigned int flags)
+static void mark_mt_check(unsigned int flags)
{
- if (!flags)
+ if (flags == 0)
exit_error(PARAMETER_PROBLEM,
- "MARK match: You must specify `--mark'");
+ "mark match: The --mark option is required");
+}
+
+static void
+mark_mt_print(const void *ip, const struct xt_entry_match *match, int numeric)
+{
+ const struct xt_mark_mtinfo1 *info = (const void *)match->data;
+
+ printf("mark match ");
+ if (info->invert)
+ printf("!");
+ print_mark(info->mark, info->mask);
}
/* Prints out the matchinfo. */
@@ -82,7 +121,18 @@ mark_print(const void *ip, const struct xt_entry_match *match, int numeric)
if (info->invert)
printf("!");
- print_mark(info->mark, info->mask, numeric);
+ print_mark(info->mark, info->mask);
+}
+
+static void mark_mt_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct xt_mark_mtinfo1 *info = (const void *)match->data;
+
+ if (info->invert)
+ printf("!");
+
+ printf("--mark ");
+ print_mark(info->mark, info->mask);
}
/* Saves the union ipt_matchinfo in parsable form to stdout. */
@@ -95,39 +145,73 @@ mark_save(const void *ip, const struct xt_entry_match *match)
printf("! ");
printf("--mark ");
- print_mark(info->mark, info->mask, 0);
+ print_mark(info->mark, info->mask);
}
static struct xtables_match mark_match = {
.family = AF_INET,
.name = "mark",
+ .revision = 0,
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_mark_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_info)),
- .help = mark_help,
+ .help = mark_mt_help,
.parse = mark_parse,
- .final_check = mark_check,
+ .final_check = mark_mt_check,
.print = mark_print,
.save = mark_save,
- .extra_opts = mark_opts,
+ .extra_opts = mark_mt_opts,
};
static struct xtables_match mark_match6 = {
.family = AF_INET6,
.name = "mark",
+ .revision = 0,
.version = IPTABLES_VERSION,
.size = XT_ALIGN(sizeof(struct xt_mark_info)),
.userspacesize = XT_ALIGN(sizeof(struct xt_mark_info)),
- .help = mark_help,
+ .help = mark_mt_help,
.parse = mark_parse,
- .final_check = mark_check,
+ .final_check = mark_mt_check,
.print = mark_print,
.save = mark_save,
- .extra_opts = mark_opts,
+ .extra_opts = mark_mt_opts,
+};
+
+static struct xtables_match mark_mt_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "mark",
+ .revision = 1,
+ .family = AF_INET6,
+ .size = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
+ .help = mark_mt_help,
+ .parse = mark_mt_parse,
+ .final_check = mark_mt_check,
+ .print = mark_mt_print,
+ .save = mark_mt_save,
+ .extra_opts = mark_mt_opts,
+};
+
+static struct xtables_match mark_mt6_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "mark",
+ .revision = 1,
+ .family = AF_INET6,
+ .size = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_mark_mtinfo1)),
+ .help = mark_mt_help,
+ .parse = mark_mt_parse,
+ .final_check = mark_mt_check,
+ .print = mark_mt_print,
+ .save = mark_mt_save,
+ .extra_opts = mark_mt_opts,
};
void _init(void)
{
xtables_register_match(&mark_match);
xtables_register_match(&mark_match6);
+ xtables_register_match(&mark_mt_reg);
+ xtables_register_match(&mark_mt6_reg);
}
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