Git init

1 files changed, 204 insertions, 0 deletions

diff --git a/extensions/libxt_NFQUEUE.c b/extensions/libxt_NFQUEUE.c
new file mode 100644
index 0000000..2d9d98a
--- /dev/null
+++ b/extensions/libxt_NFQUEUE.c
@@ -0,0 +1,204 @@
+/* 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 NFQUEUE_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 void NFQUEUE_help_v1(void)
+{
+	NFQUEUE_help();
+	printf(
+"  --queue-balance first:last	Balance flows between queues <value> to <value>.\n");
+}
+
+static const struct option NFQUEUE_opts[] = {
+	{ "queue-num", 1, NULL, 'F' },
+	{ "queue-balance", 1, NULL, 'B' },
+	{ .name = NULL }
+};
+
+static void exit_badqueue(const char *s)
+{
+	xtables_error(PARAMETER_PROBLEM, "Invalid queue number `%s'\n", s);
+}
+
+static void
+parse_num(const char *s, struct xt_NFQ_info *tinfo)
+{
+	unsigned int num;
+
+	if (!xtables_strtoui(s, NULL, &num, 0, UINT16_MAX))
+		exit_badqueue(s);
+
+	tinfo->queuenum = num;
+}
+
+static int
+NFQUEUE_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)
+			xtables_error(PARAMETER_PROBLEM, "NFQUEUE target: "
+				   "Only use --queue-num ONCE!");
+		parse_num(optarg, tinfo);
+		break;
+	case 'B':
+		xtables_error(PARAMETER_PROBLEM, "NFQUEUE target: "
+				   "--queue-balance not supported (kernel too old?)");
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static int
+NFQUEUE_parse_v1(int c, char **argv, int invert, unsigned int *flags,
+                 const void *entry, struct xt_entry_target **target)
+{
+	struct xt_NFQ_info_v1 *info = (void *)(*target)->data;
+	char *colon;
+	unsigned int firstqueue, lastqueue;
+
+	switch (c) {
+	case 'F': /* fallthrough */
+	case 'B':
+		if (*flags)
+			xtables_error(PARAMETER_PROBLEM, "NFQUEUE target: "
+				   "Only use --queue-num ONCE!");
+
+		if (!xtables_strtoui(optarg, &colon, &firstqueue, 0, UINT16_MAX))
+			exit_badqueue(optarg);
+
+		info->queuenum = firstqueue;
+
+		if (c == 'F') {
+			if (*colon)
+				exit_badqueue(optarg);
+			break;
+		}
+
+		if (*colon != ':')
+			xtables_error(PARAMETER_PROBLEM, "Bad range \"%s\"", optarg);
+
+		if (!xtables_strtoui(colon + 1, NULL, &lastqueue, 1, UINT16_MAX))
+			exit_badqueue(optarg);
+
+		if (firstqueue >= lastqueue)
+			xtables_error(PARAMETER_PROBLEM, "%u should be less than %u",
+							firstqueue, lastqueue);
+		info->queues_total = lastqueue - firstqueue + 1;
+		break;
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static void NFQUEUE_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);
+}
+
+static void NFQUEUE_print_v1(const void *ip,
+                             const struct xt_entry_target *target, int numeric)
+{
+	const struct xt_NFQ_info_v1 *tinfo = (const void *)target->data;
+	unsigned int last = tinfo->queues_total;
+
+	if (last > 1) {
+		last += tinfo->queuenum - 1;
+		printf("NFQUEUE balance %u:%u", tinfo->queuenum, last);
+	} else {
+		printf("NFQUEUE num %u", tinfo->queuenum);
+	}
+}
+
+static void NFQUEUE_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 void NFQUEUE_save_v1(const void *ip, const struct xt_entry_target *target)
+{
+	const struct xt_NFQ_info_v1 *tinfo = (const void *)target->data;
+	unsigned int last = tinfo->queues_total;
+
+	if (last > 1) {
+		last += tinfo->queuenum - 1;
+		printf("--queue-balance %u:%u ", tinfo->queuenum, last);
+	} else {
+		printf("--queue-num %u ", tinfo->queuenum);
+	}
+}
+
+static void NFQUEUE_init_v1(struct xt_entry_target *t)
+{
+	struct xt_NFQ_info_v1 *tinfo = (void *)t->data;
+	tinfo->queues_total = 1;
+}
+
+static struct xtables_target nfqueue_target = {
+	.family		= NFPROTO_UNSPEC,
+	.name		= "NFQUEUE",
+	.version	= XTABLES_VERSION,
+	.size		= XT_ALIGN(sizeof(struct xt_NFQ_info)),
+	.userspacesize	= XT_ALIGN(sizeof(struct xt_NFQ_info)),
+	.help		= NFQUEUE_help,
+	.parse		= NFQUEUE_parse,
+	.print		= NFQUEUE_print,
+	.save		= NFQUEUE_save,
+	.extra_opts	= NFQUEUE_opts
+};
+
+static struct xtables_target nfqueue_target_v1 = {
+	.family		= NFPROTO_UNSPEC,
+	.revision	= 1,
+	.name		= "NFQUEUE",
+	.version	= XTABLES_VERSION,
+	.size		= XT_ALIGN(sizeof(struct xt_NFQ_info_v1)),
+	.userspacesize	= XT_ALIGN(sizeof(struct xt_NFQ_info_v1)),
+	.help		= NFQUEUE_help_v1,
+	.init		= NFQUEUE_init_v1,
+	.parse		= NFQUEUE_parse_v1,
+	.print		= NFQUEUE_print_v1,
+	.save		= NFQUEUE_save_v1,
+	.extra_opts	= NFQUEUE_opts,
+};
+
+void _init(void)
+{
+	xtables_register_target(&nfqueue_target);
+	xtables_register_target(&nfqueue_target_v1);
+}