summaryrefslogtreecommitdiffstats
path: root/extensions/libip6t_condition.c
diff options
context:
space:
mode:
Diffstat (limited to 'extensions/libip6t_condition.c')
-rw-r--r--extensions/libip6t_condition.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/extensions/libip6t_condition.c b/extensions/libip6t_condition.c
new file mode 100644
index 0000000..474b497
--- /dev/null
+++ b/extensions/libip6t_condition.c
@@ -0,0 +1,114 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <ip6tables.h>
+
+#include<linux/netfilter_ipv6/ip6_tables.h>
+#include<linux/netfilter_ipv6/ip6t_condition.h>
+
+
+static void
+help(void)
+{
+ printf("condition match v%s options:\n"
+ "--condition [!] filename "
+ "Match on boolean value stored in /proc file\n",
+ IPTABLES_VERSION);
+}
+
+
+static struct option opts[] = {
+ { .name = "condition", .has_arg = 1, .flag = 0, .val = 'X' },
+ { .name = 0 }
+};
+
+
+static void
+init(struct ip6t_entry_match *m, unsigned int *nfcache)
+{
+ *nfcache |= NFC_UNKNOWN;
+}
+
+
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const struct ip6t_entry *entry, unsigned int *nfcache,
+ struct ip6t_entry_match **match)
+{
+ struct condition6_info *info =
+ (struct condition6_info *) (*match)->data;
+
+ check_inverse(optarg, &invert, &optind, 0);
+
+ if (*flags)
+ exit_error(PARAMETER_PROBLEM,
+ "Can't specify multiple conditions");
+
+ if (c == 'X') {
+ if (strlen(argv[optind - 1]) < CONDITION6_NAME_LEN)
+ strcpy(info->name, argv[optind - 1]);
+ else
+ exit_error(PARAMETER_PROBLEM,
+ "File name too long");
+
+ info->invert = invert;
+ *flags = 1;
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static void
+final_check(unsigned int flags)
+{
+ if (!flags)
+ exit_error(PARAMETER_PROBLEM,
+ "Condition match: must specify --condition");
+}
+
+
+static void
+print(const struct ip6t_ip6 *ip,
+ const struct ip6t_entry_match *match, int numeric)
+{
+ const struct condition6_info *info =
+ (const struct condition6_info *) match->data;
+
+ printf("condition %s%s ", (info->invert) ? "!" : "", info->name);
+}
+
+
+static void
+save(const struct ip6t_ip6 *ip,
+ const struct ip6t_entry_match *match)
+{
+ const struct condition6_info *info =
+ (const struct condition6_info *) match->data;
+
+ printf("--condition %s%s ", (info->invert) ? "! " : "", info->name);
+}
+
+
+static struct ip6tables_match condition = {
+ .name = "condition",
+ .version = IPTABLES_VERSION,
+ .size = IP6T_ALIGN(sizeof(struct condition6_info)),
+ .userspacesize = IP6T_ALIGN(sizeof(struct condition6_info)),
+ .help = &help,
+ .init = &init,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+
+void
+_init(void)
+{
+ register_match6(&condition);
+}