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-rwxr-xr-xextensions/.CONNMARK-test2
-rwxr-xr-xextensions/.connmark-test2
-rw-r--r--extensions/libipt_CONNMARK.c167
-rw-r--r--extensions/libipt_connmark.c129
4 files changed, 300 insertions, 0 deletions
diff --git a/extensions/.CONNMARK-test b/extensions/.CONNMARK-test
new file mode 100755
index 00000000..a5137594
--- /dev/null
+++ b/extensions/.CONNMARK-test
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/net/ipv4/netfilter/ipt_CONNMARK.c ] && echo CONNMARK
diff --git a/extensions/.connmark-test b/extensions/.connmark-test
new file mode 100755
index 00000000..80d437b9
--- /dev/null
+++ b/extensions/.connmark-test
@@ -0,0 +1,2 @@
+#! /bin/sh
+[ -f $KERNEL_DIR/net/ipv4/netfilter/ipt_connmark.c ] && echo connmark
diff --git a/extensions/libipt_CONNMARK.c b/extensions/libipt_CONNMARK.c
new file mode 100644
index 00000000..824c1de0
--- /dev/null
+++ b/extensions/libipt_CONNMARK.c
@@ -0,0 +1,167 @@
+/* Shared library add-on to iptables to add CONNMARK target support. */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_CONNMARK.h>
+
+#if 0
+struct markinfo {
+ struct ipt_entry_target t;
+ struct ipt_connmark_target_info mark;
+};
+#endif
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+ printf(
+"CONNMARK target v%s options:\n"
+" --set-mark value Set conntrack mark value\n"
+" --save-mark Save the packet nfmark on the connection\n"
+" --restore-mark Restore saved nfmark value\n"
+"\n",
+NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+ { "set-mark", 1, 0, '1' },
+ { "save-mark", 0, 0, '2' },
+ { "restore-mark", 0, 0, '3' },
+ { 0 }
+};
+
+/* Initialize the target. */
+static void
+init(struct ipt_entry_target *t, unsigned int *nfcache)
+{
+}
+
+/* Function which parses command options; returns true if it
+ ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const struct ipt_entry *entry,
+ struct ipt_entry_target **target)
+{
+ struct ipt_connmark_target_info *markinfo
+ = (struct ipt_connmark_target_info *)(*target)->data;
+
+ switch (c) {
+ char *end;
+ case '1':
+ markinfo->mode = IPT_CONNMARK_SET;
+ markinfo->mark = strtoul(optarg, &end, 0);
+ if (*end != '\0' || end == optarg)
+ exit_error(PARAMETER_PROBLEM, "Bad MARK value `%s'", optarg);
+ if (*flags)
+ exit_error(PARAMETER_PROBLEM,
+ "CONNMARK target: Can't specify --set-mark twice");
+ *flags = 1;
+ break;
+ case '2':
+ markinfo->mode = IPT_CONNMARK_SAVE;
+ if (*flags)
+ exit_error(PARAMETER_PROBLEM,
+ "CONNMARK target: Can't specify --save-mark twice");
+ *flags = 1;
+ break;
+ case '3':
+ markinfo->mode = IPT_CONNMARK_RESTORE;
+ if (*flags)
+ exit_error(PARAMETER_PROBLEM,
+ "CONNMARK target: Can't specify --restore-mark twice");
+ *flags = 1;
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+ if (!flags)
+ exit_error(PARAMETER_PROBLEM,
+ "CONNMARK target: Parameter --set-mark is required");
+}
+
+static void
+print_mark(unsigned long mark, int numeric)
+{
+ printf("0x%lx ", mark);
+}
+
+/* Prints out the targinfo. */
+static void
+print(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target,
+ int numeric)
+{
+ const struct ipt_connmark_target_info *markinfo =
+ (const struct ipt_connmark_target_info *)target->data;
+ switch (markinfo->mode) {
+ case IPT_CONNMARK_SET:
+ printf("CONNMARK set ");
+ print_mark(markinfo->mark, numeric);
+ break;
+ case IPT_CONNMARK_SAVE:
+ printf("CONNMARK save ");
+ break;
+ case IPT_CONNMARK_RESTORE:
+ printf("CONNMARK restore ");
+ break;
+ default:
+ printf("ERROR: UNKNOWN CONNMARK MODE ");
+ break;
+ }
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+save(const struct ipt_ip *ip, const struct ipt_entry_target *target)
+{
+ const struct ipt_connmark_target_info *markinfo =
+ (const struct ipt_connmark_target_info *)target->data;
+
+ switch (markinfo->mode) {
+ case IPT_CONNMARK_SET:
+ printf("--set-mark 0x%lx ", markinfo->mark);
+ break;
+ case IPT_CONNMARK_SAVE:
+ printf("--save-mark ");
+ break;
+ case IPT_CONNMARK_RESTORE:
+ printf("--restore-mark ");
+ break;
+ default:
+ printf("ERROR: UNKNOWN CONNMARK MODE ");
+ break;
+ }
+}
+
+struct iptables_target mark
+= { NULL,
+ "CONNMARK",
+ NETFILTER_VERSION,
+ IPT_ALIGN(sizeof(struct ipt_connmark_target_info)),
+ IPT_ALIGN(sizeof(struct ipt_connmark_target_info)),
+ &help,
+ &init,
+ &parse,
+ &final_check,
+ &print,
+ &save,
+ opts
+};
+
+void _init(void)
+{
+ register_target(&mark);
+}
diff --git a/extensions/libipt_connmark.c b/extensions/libipt_connmark.c
new file mode 100644
index 00000000..e71d9629
--- /dev/null
+++ b/extensions/libipt_connmark.c
@@ -0,0 +1,129 @@
+/* Shared library add-on to iptables to add CONNMARK matching support. */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <iptables.h>
+#include <linux/netfilter_ipv4/ipt_connmark.h>
+
+/* Function which prints out usage message. */
+static void
+help(void)
+{
+ printf(
+"CONNMARK match v%s options:\n"
+"[!] --mark value[/mask] Match nfmark value with optional mask\n"
+"\n",
+NETFILTER_VERSION);
+}
+
+static struct option opts[] = {
+ { "mark", 1, 0, '1' },
+ {0}
+};
+
+/* Initialize the match. */
+static void
+init(struct ipt_entry_match *m, unsigned int *nfcache)
+{
+ /* Can't cache this. */
+ *nfcache |= NFC_UNKNOWN;
+}
+
+/* Function which parses command options; returns true if it
+ ate an option */
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const struct ipt_entry *entry,
+ unsigned int *nfcache,
+ struct ipt_entry_match **match)
+{
+ struct ipt_connmark_info *markinfo = (struct ipt_connmark_info *)(*match)->data;
+
+ switch (c) {
+ char *end;
+ case '1':
+ if (check_inverse(optarg, &invert))
+ optind++;
+ markinfo->mark = strtoul(optarg, &end, 0);
+ if (*end == '/') {
+ markinfo->mask = strtoul(end+1, &end, 0);
+ } else
+ markinfo->mask = 0xffffffff;
+ 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 long mark, unsigned long mask, int invert, int numeric)
+{
+ if (invert)
+ fputc('!', stdout);
+
+ if(mask != 0xffffffff)
+ printf("0x%lx/0x%lx ", mark, mask);
+ else
+ printf("0x%lx ", mark);
+}
+
+/* Final check; must have specified --mark. */
+static void
+final_check(unsigned int flags)
+{
+ if (!flags)
+ exit_error(PARAMETER_PROBLEM,
+ "MARK match: You must specify `--mark'");
+}
+
+/* Prints out the matchinfo. */
+static void
+print(const struct ipt_ip *ip,
+ const struct ipt_entry_match *match,
+ int numeric)
+{
+ printf("CONNMARK match ");
+ print_mark(((struct ipt_connmark_info *)match->data)->mark,
+ ((struct ipt_connmark_info *)match->data)->mask,
+ ((struct ipt_connmark_info *)match->data)->invert, numeric);
+}
+
+/* Saves the union ipt_matchinfo in parsable form to stdout. */
+static void
+save(const struct ipt_ip *ip, const struct ipt_entry_match *match)
+{
+ printf("--mark ");
+ print_mark(((struct ipt_connmark_info *)match->data)->mark,
+ ((struct ipt_connmark_info *)match->data)->mask,
+ ((struct ipt_connmark_info *)match->data)->invert, 0);
+}
+
+struct iptables_match mark
+= { NULL,
+ "connmark",
+ NETFILTER_VERSION,
+ IPT_ALIGN(sizeof(struct ipt_connmark_info)),
+ IPT_ALIGN(sizeof(struct ipt_connmark_info)),
+ &help,
+ &init,
+ &parse,
+ &final_check,
+ &print,
+ &save,
+ opts
+};
+
+void _init(void)
+{
+ register_match(&mark);
+}
generated by cgit v1.2.3 (git 2.25.0) at 2024-11-16 14:45:25 +0000