--- /dev/null
+/* 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 <ip6tables.h>
+#include <linux/netfilter_ipv6/ip6_tables.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 < sizeof(mh_names)/sizeof(struct mh_name); 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);
+ unsigned int limit = sizeof(mh_names)/sizeof(struct mh_name);
+ 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 (string_to_number(name, 0, 255, &number) == -1)
+ exit_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])
+ exit_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)
+ exit_error(PARAMETER_PROBLEM,
+ "Only one `--mh-type' allowed");
+ check_inverse(optarg, &invert, &optind, 0);
+ parse_mh_types(argv[optind-1], 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 < sizeof(mh_names)/sizeof(struct mh_name); 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 = PF_INET6,
+ .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);
+}
git://git.onelab.eu / iptables.git / blobdiff