--- /dev/null
+/* Shared library add-on to iptables to add connmark matching support.
+ *
+ * (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
+ * by Henrik Nordstrom <hno@marasystems.com>
+ *
+ * Version 1.1
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <xtables.h>
+#include <linux/netfilter/xt_connmark.h>
+
+enum {
+ F_MARK = 1 << 0,
+};
+
+static void connmark_mt_help(void)
+{
+ printf(
+"connmark match options:\n"
+"[!] --mark value[/mask] Match ctmark value with optional mask\n");
+}
+
+static const struct option connmark_mt_opts[] = {
+ {.name = "mark", .has_arg = true, .val = '1'},
+ { .name = NULL }
+};
+
+static int
+connmark_mt_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct xt_connmark_mtinfo1 *info = (void *)(*match)->data;
+ unsigned int mark, mask = ~0U;
+ char *end;
+
+ switch (c) {
+ case '1': /* --mark */
+ param_act(P_ONLY_ONCE, "connmark", "--mark", *flags & F_MARK);
+ if (!strtonum(optarg, &end, &mark, 0, ~0U))
+ param_act(P_BAD_VALUE, "connmark", "--mark", optarg);
+ if (*end == '/')
+ if (!strtonum(end + 1, &end, &mask, 0, ~0U))
+ param_act(P_BAD_VALUE, "connmark", "--mark", optarg);
+ if (*end != '\0')
+ param_act(P_BAD_VALUE, "connmark", "--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
+connmark_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct xt_connmark_info *markinfo = (struct xt_connmark_info *)(*match)->data;
+
+ switch (c) {
+ char *end;
+ case '1':
+ check_inverse(optarg, &invert, &optind, 0);
+
+ markinfo->mark = strtoul(optarg, &end, 0);
+ markinfo->mask = 0xffffffffUL;
+
+ if (*end == '/')
+ markinfo->mask = strtoul(end+1, &end, 0);
+
+ if (*end != '\0' || end == optarg)
+ exit_error(PARAMETER_PROBLEM, "Bad MARK value `%s'", optarg);
+ if (invert)
+ markinfo->invert = 1;
+ *flags = 1;
+ break;
+
+ default:
+ return 0;
+ }
+ return 1;
+}
+
+static void print_mark(unsigned int mark, unsigned int mask)
+{
+ if (mask != 0xffffffffU)
+ printf("0x%x/0x%x ", mark, mask);
+ else
+ printf("0x%x ", mark);
+}
+
+static void connmark_mt_check(unsigned int flags)
+{
+ if (flags == 0)
+ exit_error(PARAMETER_PROBLEM,
+ "connmark: The --mark option is required");
+}
+
+/* Prints out the matchinfo. */
+static void
+connmark_print(const void *ip, const struct xt_entry_match *match, int numeric)
+{
+ struct xt_connmark_info *info = (struct xt_connmark_info *)match->data;
+
+ printf("CONNMARK match ");
+ if (info->invert)
+ printf("!");
+ print_mark(info->mark, info->mask);
+}
+
+static void
+connmark_mt_print(const void *ip, const struct xt_entry_match *match, int numeric)
+{
+ const struct xt_connmark_mtinfo1 *info = (const void *)match->data;
+
+ printf("connmark match ");
+ if (info->invert)
+ printf("!");
+ print_mark(info->mark, info->mask);
+}
+
+/* Saves the matchinfo in parsable form to stdout. */
+static void connmark_save(const void *ip, const struct xt_entry_match *match)
+{
+ struct xt_connmark_info *info = (struct xt_connmark_info *)match->data;
+
+ if (info->invert)
+ printf("! ");
+
+ printf("--mark ");
+ print_mark(info->mark, info->mask);
+}
+
+static void
+connmark_mt_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct xt_connmark_mtinfo1 *info = (const void *)match->data;
+
+ if (info->invert)
+ printf("! ");
+
+ printf("--mark ");
+ print_mark(info->mark, info->mask);
+}
+
+static struct xtables_match connmark_mt_reg_v0 = {
+ .family = AF_INET,
+ .name = "connmark",
+ .revision = 0,
+ .version = XTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_connmark_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_connmark_info)),
+ .help = connmark_mt_help,
+ .parse = connmark_parse,
+ .final_check = connmark_mt_check,
+ .print = connmark_print,
+ .save = connmark_save,
+ .extra_opts = connmark_mt_opts,
+};
+
+static struct xtables_match connmark_mt6_reg_v0 = {
+ .family = AF_INET6,
+ .name = "connmark",
+ .revision = 0,
+ .version = XTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_connmark_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_connmark_info)),
+ .help = connmark_mt_help,
+ .parse = connmark_parse,
+ .final_check = connmark_mt_check,
+ .print = connmark_print,
+ .save = connmark_save,
+ .extra_opts = connmark_mt_opts,
+};
+
+static struct xtables_match connmark_mt_reg = {
+ .version = XTABLES_VERSION,
+ .name = "connmark",
+ .revision = 1,
+ .family = AF_INET,
+ .size = XT_ALIGN(sizeof(struct xt_connmark_mtinfo1)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_connmark_mtinfo1)),
+ .help = connmark_mt_help,
+ .parse = connmark_mt_parse,
+ .final_check = connmark_mt_check,
+ .print = connmark_mt_print,
+ .save = connmark_mt_save,
+ .extra_opts = connmark_mt_opts,
+};
+
+static struct xtables_match connmark_mt6_reg = {
+ .version = XTABLES_VERSION,
+ .name = "connmark",
+ .revision = 1,
+ .family = AF_INET6,
+ .size = XT_ALIGN(sizeof(struct xt_connmark_mtinfo1)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_connmark_mtinfo1)),
+ .help = connmark_mt_help,
+ .parse = connmark_mt_parse,
+ .final_check = connmark_mt_check,
+ .print = connmark_mt_print,
+ .save = connmark_mt_save,
+ .extra_opts = connmark_mt_opts,
+};
+
+void _init(void)
+{
+ xtables_register_match(&connmark_mt_reg_v0);
+ xtables_register_match(&connmark_mt6_reg_v0);
+ xtables_register_match(&connmark_mt_reg);
+ xtables_register_match(&connmark_mt6_reg);
+}