Git init

1 files changed, 240 insertions, 0 deletions

diff --git a/extensions/libip6t_mh.c b/extensions/libip6t_mh.c
new file mode 100644
index 0000000..95cd65d
--- /dev/null
+++ b/extensions/libip6t_mh.c
@@ -0,0 +1,240 @@
+/* Shared library add-on to ip6tables to add mobility header support. */
+/*
+ * Copyright (C)2006 USAGI/WIDE Project
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Author:
+ *	Masahide NAKAMURA @USAGI <masahide.nakamura.cz@hitachi.com>
+ *
+ * Based on libip6t_{icmpv6,udp}.c
+ */
+#include <stdio.h>
+#include <netdb.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <xtables.h>
+#include <linux/netfilter_ipv6/ip6t_mh.h>
+
+struct mh_name {
+	const char *name;
+	u_int8_t type;
+};
+
+static const struct mh_name mh_names[] = {
+	{ "binding-refresh-request", 0, },
+	/* Alias */ { "brr", 0, },
+	{ "home-test-init", 1, },
+	/* Alias */ { "hoti", 1, },
+	{ "careof-test-init", 2, },
+	/* Alias */ { "coti", 2, },
+	{ "home-test", 3, },
+	/* Alias */ { "hot", 3, },
+	{ "careof-test", 4, },
+	/* Alias */ { "cot", 4, },
+	{ "binding-update", 5, },
+	/* Alias */ { "bu", 5, },
+	{ "binding-acknowledgement", 6, },
+	/* Alias */ { "ba", 6, },
+	{ "binding-error", 7, },
+	/* Alias */ { "be", 7, },
+};
+
+static void print_types_all(void)
+{
+	unsigned int i;
+	printf("Valid MH types:");
+
+	for (i = 0; i < ARRAY_SIZE(mh_names); ++i) {
+		if (i && mh_names[i].type == mh_names[i-1].type)
+			printf(" (%s)", mh_names[i].name);
+		else
+			printf("\n%s", mh_names[i].name);
+	}
+	printf("\n");
+}
+
+static void mh_help(void)
+{
+	printf(
+"mh match options:\n"
+"[!] --mh-type type[:type]	match mh type\n");
+	print_types_all();
+}
+
+static void mh_init(struct xt_entry_match *m)
+{
+	struct ip6t_mh *mhinfo = (struct ip6t_mh *)m->data;
+
+	mhinfo->types[1] = 0xFF;
+}
+
+static unsigned int name_to_type(const char *name)
+{
+	int namelen = strlen(name);
+	static const unsigned int limit = ARRAY_SIZE(mh_names);
+	unsigned int match = limit;
+	unsigned int i;
+
+	for (i = 0; i < limit; i++) {
+		if (strncasecmp(mh_names[i].name, name, namelen) == 0) {
+			int len = strlen(mh_names[i].name);
+			if (match == limit || len == namelen)
+				match = i;
+		}
+	}
+
+	if (match != limit) {
+		return mh_names[match].type;
+	} else {
+		unsigned int number;
+
+		if (!xtables_strtoui(name, NULL, &number, 0, UINT8_MAX))
+			xtables_error(PARAMETER_PROBLEM,
+				   "Invalid MH type `%s'\n", name);
+		return number;
+	}
+}
+
+static void parse_mh_types(const char *mhtype, u_int8_t *types)
+{
+	char *buffer;
+	char *cp;
+
+	buffer = strdup(mhtype);
+	if ((cp = strchr(buffer, ':')) == NULL)
+		types[0] = types[1] = name_to_type(buffer);
+	else {
+		*cp = '\0';
+		cp++;
+
+		types[0] = buffer[0] ? name_to_type(buffer) : 0;
+		types[1] = cp[0] ? name_to_type(cp) : 0xFF;
+
+		if (types[0] > types[1])
+			xtables_error(PARAMETER_PROBLEM,
+				   "Invalid MH type range (min > max)");
+	}
+	free(buffer);
+}
+
+#define MH_TYPES 0x01
+
+static int mh_parse(int c, char **argv, int invert, unsigned int *flags,
+                    const void *entry, struct xt_entry_match **match)
+{
+	struct ip6t_mh *mhinfo = (struct ip6t_mh *)(*match)->data;
+
+	switch (c) {
+	case '1':
+		if (*flags & MH_TYPES)
+			xtables_error(PARAMETER_PROBLEM,
+				   "Only one `--mh-type' allowed");
+		xtables_check_inverse(optarg, &invert, &optind, 0, argv);
+		parse_mh_types(optarg, mhinfo->types);
+		if (invert)
+			mhinfo->invflags |= IP6T_MH_INV_TYPE;
+		*flags |= MH_TYPES;
+		break;
+
+	default:
+		return 0;
+	}
+
+	return 1;
+}
+
+static const char *type_to_name(u_int8_t type)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(mh_names); ++i)
+		if (mh_names[i].type == type)
+			return mh_names[i].name;
+
+	return NULL;
+}
+
+static void print_type(u_int8_t type, int numeric)
+{
+	const char *name;
+	if (numeric || !(name = type_to_name(type)))
+		printf("%u", type);
+	else
+		printf("%s", name);
+}
+
+static void print_types(u_int8_t min, u_int8_t max, int invert, int numeric)
+{
+	const char *inv = invert ? "!" : "";
+
+	if (min != 0 || max != 0xFF || invert) {
+		if (min == max) {
+			printf("%s", inv);
+			print_type(min, numeric);
+		} else {
+			printf("%s", inv);
+			print_type(min, numeric);
+			printf(":");
+			print_type(max, numeric);
+		}
+		printf(" ");
+	}
+}
+
+static void mh_print(const void *ip, const struct xt_entry_match *match,
+                     int numeric)
+{
+	const struct ip6t_mh *mhinfo = (struct ip6t_mh *)match->data;
+
+	printf("mh ");
+	print_types(mhinfo->types[0], mhinfo->types[1],
+		    mhinfo->invflags & IP6T_MH_INV_TYPE,
+		    numeric);
+	if (mhinfo->invflags & ~IP6T_MH_INV_MASK)
+		printf("Unknown invflags: 0x%X ",
+		       mhinfo->invflags & ~IP6T_MH_INV_MASK);
+}
+
+static void mh_save(const void *ip, const struct xt_entry_match *match)
+{
+	const struct ip6t_mh *mhinfo = (struct ip6t_mh *)match->data;
+
+	if (mhinfo->types[0] == 0 && mhinfo->types[1] == 0xFF)
+		return;
+
+	if (mhinfo->invflags & IP6T_MH_INV_TYPE)
+		printf("! ");
+
+	if (mhinfo->types[0] != mhinfo->types[1])
+		printf("--mh-type %u:%u ", mhinfo->types[0], mhinfo->types[1]);
+	else
+		printf("--mh-type %u ", mhinfo->types[0]);
+}
+
+static const struct option mh_opts[] = {
+	{ "mh-type", 1, NULL, '1' },
+	{ .name = NULL }
+};
+
+static struct xtables_match mh_mt6_reg = {
+	.name		= "mh",
+	.version	= XTABLES_VERSION,
+	.family		= NFPROTO_IPV6,
+	.size		= XT_ALIGN(sizeof(struct ip6t_mh)),
+	.userspacesize	= XT_ALIGN(sizeof(struct ip6t_mh)),
+	.help		= mh_help,
+	.init		= mh_init,
+	.parse		= mh_parse,
+	.print		= mh_print,
+	.save		= mh_save,
+	.extra_opts	= mh_opts,
+};
+
+void _init(void)
+{
+	xtables_register_match(&mh_mt6_reg);
+}