Merge commit 'origin/trunk@12184' into fedora

[iptables.git] / trunk / extensions / libxt_CONNSECMARK.c

diff --git a/trunk/extensions/libxt_CONNSECMARK.c b/trunk/extensions/libxt_CONNSECMARK.c
new file mode 100644 (file)
index 0000000..2c425cb
--- /dev/null
+++ b/trunk/extensions/libxt_CONNSECMARK.c
@@ -0,0 +1,143 @@
+/*
+ * Shared library add-on to iptables to add CONNSECMARK target support.
+ *
+ * Based on the MARK and CONNMARK targets.
+ *
+ * Copyright (C) 2006 Red Hat, Inc., James Morris <jmorris@redhat.com>
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <xtables.h>
+#include <linux/netfilter/xt_CONNSECMARK.h>
+
+#define PFX "CONNSECMARK target: "
+
+static void CONNSECMARK_help(void)
+{
+       printf(
+"CONNSECMARK target options:\n"
+"  --save                   Copy security mark from packet to conntrack\n"
+"  --restore                Copy security mark from connection to packet\n");
+}
+
+static const struct option CONNSECMARK_opts[] = {
+       { "save", 0, NULL, '1' },
+       { "restore", 0, NULL, '2' },
+       { .name = NULL }
+};
+
+static int
+CONNSECMARK_parse(int c, char **argv, int invert, unsigned int *flags,
+                  const void *entry, struct xt_entry_target **target)
+{
+       struct xt_connsecmark_target_info *info =
+               (struct xt_connsecmark_target_info*)(*target)->data;
+
+       switch (c) {
+       case '1':
+               if (*flags & CONNSECMARK_SAVE)
+                       exit_error(PARAMETER_PROBLEM, PFX
+                                  "Can't specify --save twice");
+               info->mode = CONNSECMARK_SAVE;
+               *flags |= CONNSECMARK_SAVE;
+               break;
+
+       case '2':
+               if (*flags & CONNSECMARK_RESTORE)
+                       exit_error(PARAMETER_PROBLEM, PFX
+                                  "Can't specify --restore twice");
+               info->mode = CONNSECMARK_RESTORE;
+               *flags |= CONNSECMARK_RESTORE;
+               break;
+
+       default:
+               return 0;
+       }
+
+       return 1;
+}
+
+static void CONNSECMARK_check(unsigned int flags)
+{
+       if (!flags)
+               exit_error(PARAMETER_PROBLEM, PFX "parameter required");
+
+       if (flags == (CONNSECMARK_SAVE|CONNSECMARK_RESTORE))
+               exit_error(PARAMETER_PROBLEM, PFX "only one flag of --save "
+                          "or --restore is allowed");
+}
+
+static void print_connsecmark(struct xt_connsecmark_target_info *info)
+{
+       switch (info->mode) {
+       case CONNSECMARK_SAVE:
+               printf("save ");
+               break;
+               
+       case CONNSECMARK_RESTORE:
+               printf("restore ");
+               break;
+               
+       default:
+               exit_error(OTHER_PROBLEM, PFX "invalid mode %hhu\n", info->mode);
+       }
+}
+
+static void
+CONNSECMARK_print(const void *ip, const struct xt_entry_target *target,
+                  int numeric)
+{
+       struct xt_connsecmark_target_info *info =
+               (struct xt_connsecmark_target_info*)(target)->data;
+
+       printf("CONNSECMARK ");
+       print_connsecmark(info);
+}
+
+static void
+CONNSECMARK_save(const void *ip, const struct xt_entry_target *target)
+{
+       struct xt_connsecmark_target_info *info =
+               (struct xt_connsecmark_target_info*)target->data;
+
+       printf("--");
+       print_connsecmark(info);
+}
+
+static struct xtables_target connsecmark_target = {
+       .family         = AF_INET,
+       .name           = "CONNSECMARK",
+       .version        = XTABLES_VERSION,
+       .revision       = 0,
+       .size           = XT_ALIGN(sizeof(struct xt_connsecmark_target_info)),
+       .userspacesize  = XT_ALIGN(sizeof(struct xt_connsecmark_target_info)),
+       .parse          = CONNSECMARK_parse,
+       .help           = CONNSECMARK_help,
+       .final_check    = CONNSECMARK_check,
+       .print          = CONNSECMARK_print,
+       .save           = CONNSECMARK_save,
+       .extra_opts     = CONNSECMARK_opts,
+};
+
+static struct xtables_target connsecmark_target6 = {
+       .family         = AF_INET6,
+       .name           = "CONNSECMARK",
+       .version        = XTABLES_VERSION,
+       .revision       = 0,
+       .size           = XT_ALIGN(sizeof(struct xt_connsecmark_target_info)),
+       .userspacesize  = XT_ALIGN(sizeof(struct xt_connsecmark_target_info)),
+       .parse          = CONNSECMARK_parse,
+       .help           = CONNSECMARK_help,
+       .final_check    = CONNSECMARK_check,
+       .print          = CONNSECMARK_print,
+       .save           = CONNSECMARK_save,
+       .extra_opts     = CONNSECMARK_opts,
+};
+
+void _init(void)
+{
+       xtables_register_target(&connsecmark_target);
+       xtables_register_target(&connsecmark_target6);
+}