Merge commit 'origin/trunk@12184' into fedora

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

diff --git a/trunk/extensions/libxt_SECMARK.c b/trunk/extensions/libxt_SECMARK.c
new file mode 100644 (file)
index 0000000..7d3dbfa
--- /dev/null
+++ b/trunk/extensions/libxt_SECMARK.c
@@ -0,0 +1,118 @@
+/*
+ * Shared library add-on to iptables to add SECMARK target support.
+ *
+ * Based on the MARK target.
+ *
+ * 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_SECMARK.h>
+
+#define PFX "SECMARK target: "
+
+static void SECMARK_help(void)
+{
+       printf(
+"SECMARK target options:\n"
+"  --selctx value                     Set the SELinux security context\n");
+}
+
+static const struct option SECMARK_opts[] = {
+       { "selctx", 1, NULL, '1' },
+       { .name = NULL }
+};
+
+/*
+ * Function which parses command options; returns true if it
+ * ate an option.
+ */
+static int SECMARK_parse(int c, char **argv, int invert, unsigned int *flags,
+                         const void *entry, struct xt_entry_target **target)
+{
+       struct xt_secmark_target_info *info =
+               (struct xt_secmark_target_info*)(*target)->data;
+
+       switch (c) {
+       case '1':
+               if (*flags & SECMARK_MODE_SEL)
+                       exit_error(PARAMETER_PROBLEM, PFX
+                                  "Can't specify --selctx twice");
+               info->mode = SECMARK_MODE_SEL;
+
+               if (strlen(optarg) > SECMARK_SELCTX_MAX-1)
+                       exit_error(PARAMETER_PROBLEM, PFX
+                                  "Maximum length %u exceeded by --selctx"
+                                  " parameter (%zu)",
+                                  SECMARK_SELCTX_MAX-1, strlen(optarg));
+
+               strcpy(info->u.sel.selctx, optarg);
+               *flags |= SECMARK_MODE_SEL;
+               break;
+       default:
+               return 0;
+       }
+
+       return 1;
+}
+
+static void SECMARK_check(unsigned int flags)
+{
+       if (!flags)
+               exit_error(PARAMETER_PROBLEM, PFX "parameter required");
+}
+
+static void print_secmark(struct xt_secmark_target_info *info)
+{
+       switch (info->mode) {
+       case SECMARK_MODE_SEL:
+               printf("selctx %s ", info->u.sel.selctx);\
+               break;
+       
+       default:
+               exit_error(OTHER_PROBLEM, PFX "invalid mode %hhu\n", info->mode);
+       }
+}
+
+static void SECMARK_print(const void *ip, const struct xt_entry_target *target,
+                          int numeric)
+{
+       struct xt_secmark_target_info *info =
+               (struct xt_secmark_target_info*)(target)->data;
+
+       printf("SECMARK ");
+       print_secmark(info);
+}
+
+/* Saves the target info in parsable form to stdout. */
+static void SECMARK_save(const void *ip, const struct xt_entry_target *target)
+{
+       struct xt_secmark_target_info *info =
+               (struct xt_secmark_target_info*)target->data;
+
+       printf("--");
+       print_secmark(info);
+}
+
+static struct xtables_target secmark_target = {
+       .family         = AF_UNSPEC,
+       .name           = "SECMARK",
+       .version        = XTABLES_VERSION,
+       .revision       = 0,
+       .size           = XT_ALIGN(sizeof(struct xt_secmark_target_info)),
+       .userspacesize  = XT_ALIGN(sizeof(struct xt_secmark_target_info)),
+       .help           = SECMARK_help,
+       .parse          = SECMARK_parse,
+       .final_check    = SECMARK_check,
+       .print          = SECMARK_print,
+       .save           = SECMARK_save,
+       .extra_opts     = SECMARK_opts,
+};
+
+void _init(void)
+{
+       xtables_register_target(&secmark_target);
+}