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-rw-r--r--extensions/libxt_NFQUEUE.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/extensions/libxt_NFQUEUE.c b/extensions/libxt_NFQUEUE.c
new file mode 100644
index 0000000..558e80b
--- /dev/null
+++ b/extensions/libxt_NFQUEUE.c
@@ -0,0 +1,132 @@
+/* Shared library add-on to iptables for NFQ
+ *
+ * (C) 2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * This program is distributed under the terms of GNU GPL v2, 1991
+ *
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include <xtables.h>
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_NFQUEUE.h>
+
+static void init(struct xt_entry_target *t, unsigned int *nfcache)
+{
+}
+
+static void help(void)
+{
+ printf(
+"NFQUEUE target options\n"
+" --queue-num value Send packet to QUEUE number <value>.\n"
+" Valid queue numbers are 0-65535\n"
+);
+}
+
+static struct option opts[] = {
+ { "queue-num", 1, 0, 'F' },
+ { 0 }
+};
+
+static void
+parse_num(const char *s, struct xt_NFQ_info *tinfo)
+{
+ unsigned int num;
+
+ if (string_to_number(s, 0, 65535, &num) == -1)
+ exit_error(PARAMETER_PROBLEM,
+ "Invalid queue number `%s'\n", s);
+
+ tinfo->queuenum = num & 0xffff;
+ return;
+}
+
+static int
+parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry,
+ struct xt_entry_target **target)
+{
+ struct xt_NFQ_info *tinfo
+ = (struct xt_NFQ_info *)(*target)->data;
+
+ switch (c) {
+ case 'F':
+ if (*flags)
+ exit_error(PARAMETER_PROBLEM, "NFQUEUE target: "
+ "Only use --queue-num ONCE!");
+ parse_num(optarg, tinfo);
+ break;
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static void
+final_check(unsigned int flags)
+{
+}
+
+/* Prints out the targinfo. */
+static void
+print(const void *ip,
+ const struct xt_entry_target *target,
+ int numeric)
+{
+ const struct xt_NFQ_info *tinfo =
+ (const struct xt_NFQ_info *)target->data;
+ printf("NFQUEUE num %u", tinfo->queuenum);
+}
+
+/* Saves the union ipt_targinfo in parsable form to stdout. */
+static void
+save(const void *ip, const struct xt_entry_target *target)
+{
+ const struct xt_NFQ_info *tinfo =
+ (const struct xt_NFQ_info *)target->data;
+
+ printf("--queue-num %u ", tinfo->queuenum);
+}
+
+static struct xtables_target nfqueue = {
+ .next = NULL,
+ .family = AF_INET,
+ .name = "NFQUEUE",
+ .version = IPTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_NFQ_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info)),
+ .help = &help,
+ .init = &init,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+static struct xtables_target nfqueue6 = {
+ .next = NULL,
+ .family = AF_INET6,
+ .name = "NFQUEUE",
+ .version = IPTABLES_VERSION,
+ .size = XT_ALIGN(sizeof(struct xt_NFQ_info)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_NFQ_info)),
+ .help = &help,
+ .init = &init,
+ .parse = &parse,
+ .final_check = &final_check,
+ .print = &print,
+ .save = &save,
+ .extra_opts = opts
+};
+
+void _init(void)
+{
+ xtables_register_target(&nfqueue);
+ xtables_register_target(&nfqueue6);
+}