2019-03-18 11:44:53 +00:00
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/*-
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2023-05-10 15:40:58 +00:00
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* SPDX-License-Identifier: BSD-2-Clause
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2019-03-18 11:44:53 +00:00
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*
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* Copyright (c) 2019 Yandex LLC
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* Copyright (c) 2019 Andrey V. Elsukov <ae@FreeBSD.org>
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* Copyright (c) 2019 Boris N. Lytochkin <lytboris@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include "ipfw2.h"
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/ip_fw.h>
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#include <netinet6/ip_fw_nat64.h>
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#include <arpa/inet.h>
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typedef int (nat64clat_cb_t)(ipfw_nat64clat_cfg *i, const char *name,
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uint8_t set);
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static int nat64clat_foreach(nat64clat_cb_t *f, const char *name, uint8_t set,
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int sort);
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static void nat64clat_create(const char *name, uint8_t set, int ac, char **av);
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static void nat64clat_config(const char *name, uint8_t set, int ac, char **av);
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static void nat64clat_destroy(const char *name, uint8_t set);
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static void nat64clat_stats(const char *name, uint8_t set);
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static void nat64clat_reset_stats(const char *name, uint8_t set);
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static int nat64clat_show_cb(ipfw_nat64clat_cfg *cfg, const char *name,
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uint8_t set);
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static int nat64clat_destroy_cb(ipfw_nat64clat_cfg *cfg, const char *name,
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uint8_t set);
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static struct _s_x nat64cmds[] = {
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{ "create", TOK_CREATE },
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{ "config", TOK_CONFIG },
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{ "destroy", TOK_DESTROY },
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{ "list", TOK_LIST },
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{ "show", TOK_LIST },
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{ "stats", TOK_STATS },
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{ NULL, 0 }
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};
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static struct _s_x nat64statscmds[] = {
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{ "reset", TOK_RESET },
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{ NULL, 0 }
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};
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/*
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* This one handles all nat64clat-related commands
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* ipfw [set N] nat64clat NAME {create | config} ...
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* ipfw [set N] nat64clat NAME stats [reset]
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* ipfw [set N] nat64clat {NAME | all} destroy
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* ipfw [set N] nat64clat {NAME | all} {list | show}
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*/
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#define nat64clat_check_name table_check_name
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void
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ipfw_nat64clat_handler(int ac, char *av[])
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{
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const char *name;
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int tcmd;
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uint8_t set;
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2020-07-13 17:51:04 +00:00
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if (g_co.use_set != 0)
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set = g_co.use_set - 1;
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2019-03-18 11:44:53 +00:00
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else
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set = 0;
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ac--; av++;
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NEED1("nat64clat needs instance name");
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name = *av;
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if (nat64clat_check_name(name) != 0) {
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if (strcmp(name, "all") == 0)
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name = NULL;
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else
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errx(EX_USAGE, "nat64clat instance name %s is invalid",
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name);
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}
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ac--; av++;
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NEED1("nat64clat needs command");
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tcmd = get_token(nat64cmds, *av, "nat64clat command");
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if (name == NULL && tcmd != TOK_DESTROY && tcmd != TOK_LIST)
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errx(EX_USAGE, "nat64clat instance name required");
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switch (tcmd) {
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case TOK_CREATE:
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ac--; av++;
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nat64clat_create(name, set, ac, av);
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break;
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case TOK_CONFIG:
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ac--; av++;
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nat64clat_config(name, set, ac, av);
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break;
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case TOK_LIST:
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nat64clat_foreach(nat64clat_show_cb, name, set, 1);
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break;
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case TOK_DESTROY:
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if (name == NULL)
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nat64clat_foreach(nat64clat_destroy_cb, NULL, set, 0);
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else
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nat64clat_destroy(name, set);
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break;
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case TOK_STATS:
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ac--; av++;
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if (ac == 0) {
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nat64clat_stats(name, set);
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break;
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}
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tcmd = get_token(nat64statscmds, *av, "stats command");
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if (tcmd == TOK_RESET)
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nat64clat_reset_stats(name, set);
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}
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}
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static void
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nat64clat_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set)
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{
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ntlv->head.type = IPFW_TLV_EACTION_NAME(1); /* it doesn't matter */
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ntlv->head.length = sizeof(ipfw_obj_ntlv);
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ntlv->idx = 1;
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ntlv->set = set;
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strlcpy(ntlv->name, name, sizeof(ntlv->name));
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}
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static struct _s_x nat64newcmds[] = {
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{ "plat_prefix", TOK_PLAT_PREFIX },
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{ "clat_prefix", TOK_CLAT_PREFIX },
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{ "log", TOK_LOG },
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{ "-log", TOK_LOGOFF },
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{ "allow_private", TOK_PRIVATE },
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{ "-allow_private", TOK_PRIVATEOFF },
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{ NULL, 0 }
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};
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/*
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* Creates new nat64clat instance
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* ipfw nat64clat <NAME> create clat_prefix <prefix> plat_prefix <prefix>
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* Request: [ ipfw_obj_lheader ipfw_nat64clat_cfg ]
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*/
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#define NAT64CLAT_HAS_CLAT_PREFIX 0x01
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#define NAT64CLAT_HAS_PLAT_PREFIX 0x02
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static void
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nat64clat_create(const char *name, uint8_t set, int ac, char *av[])
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{
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char buf[sizeof(ipfw_obj_lheader) + sizeof(ipfw_nat64clat_cfg)];
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ipfw_nat64clat_cfg *cfg;
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ipfw_obj_lheader *olh;
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int tcmd, flags;
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char *p;
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struct in6_addr prefix;
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uint8_t plen;
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memset(buf, 0, sizeof(buf));
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olh = (ipfw_obj_lheader *)buf;
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cfg = (ipfw_nat64clat_cfg *)(olh + 1);
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/* Some reasonable defaults */
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inet_pton(AF_INET6, "64:ff9b::", &cfg->plat_prefix);
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cfg->plat_plen = 96;
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cfg->set = set;
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flags = NAT64CLAT_HAS_PLAT_PREFIX;
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while (ac > 0) {
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tcmd = get_token(nat64newcmds, *av, "option");
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ac--; av++;
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switch (tcmd) {
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case TOK_PLAT_PREFIX:
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case TOK_CLAT_PREFIX:
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if (tcmd == TOK_PLAT_PREFIX) {
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NEED1("IPv6 plat_prefix required");
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} else {
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NEED1("IPv6 clat_prefix required");
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}
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if ((p = strchr(*av, '/')) != NULL)
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*p++ = '\0';
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if (inet_pton(AF_INET6, *av, &prefix) != 1)
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errx(EX_USAGE,
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"Bad prefix: %s", *av);
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plen = strtol(p, NULL, 10);
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if (ipfw_check_nat64prefix(&prefix, plen) != 0)
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errx(EX_USAGE,
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"Bad prefix length: %s", p);
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if (tcmd == TOK_PLAT_PREFIX) {
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flags |= NAT64CLAT_HAS_PLAT_PREFIX;
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cfg->plat_prefix = prefix;
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cfg->plat_plen = plen;
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} else {
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flags |= NAT64CLAT_HAS_CLAT_PREFIX;
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cfg->clat_prefix = prefix;
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cfg->clat_plen = plen;
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}
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ac--; av++;
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break;
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case TOK_LOG:
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cfg->flags |= NAT64_LOG;
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break;
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case TOK_LOGOFF:
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cfg->flags &= ~NAT64_LOG;
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break;
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case TOK_PRIVATE:
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cfg->flags |= NAT64_ALLOW_PRIVATE;
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break;
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case TOK_PRIVATEOFF:
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cfg->flags &= ~NAT64_ALLOW_PRIVATE;
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break;
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}
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}
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/* Check validness */
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if ((flags & NAT64CLAT_HAS_PLAT_PREFIX) != NAT64CLAT_HAS_PLAT_PREFIX)
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errx(EX_USAGE, "plat_prefix required");
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if ((flags & NAT64CLAT_HAS_CLAT_PREFIX) != NAT64CLAT_HAS_CLAT_PREFIX)
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errx(EX_USAGE, "clat_prefix required");
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olh->count = 1;
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olh->objsize = sizeof(*cfg);
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olh->size = sizeof(buf);
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strlcpy(cfg->name, name, sizeof(cfg->name));
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if (do_set3(IP_FW_NAT64CLAT_CREATE, &olh->opheader, sizeof(buf)) != 0)
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err(EX_OSERR, "nat64clat instance creation failed");
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}
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/*
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* Configures existing nat64clat instance
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* ipfw nat64clat <NAME> config <options>
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* Request: [ ipfw_obj_header ipfw_nat64clat_cfg ]
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*/
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static void
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nat64clat_config(const char *name, uint8_t set, int ac, char **av)
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{
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char buf[sizeof(ipfw_obj_header) + sizeof(ipfw_nat64clat_cfg)];
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ipfw_nat64clat_cfg *cfg;
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ipfw_obj_header *oh;
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char *opt;
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char *p;
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size_t sz;
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int tcmd;
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struct in6_addr prefix;
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uint8_t plen;
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if (ac == 0)
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errx(EX_USAGE, "config options required");
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memset(&buf, 0, sizeof(buf));
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oh = (ipfw_obj_header *)buf;
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cfg = (ipfw_nat64clat_cfg *)(oh + 1);
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sz = sizeof(buf);
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nat64clat_fill_ntlv(&oh->ntlv, name, set);
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if (do_get3(IP_FW_NAT64CLAT_CONFIG, &oh->opheader, &sz) != 0)
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err(EX_OSERR, "failed to get config for instance %s", name);
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while (ac > 0) {
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tcmd = get_token(nat64newcmds, *av, "option");
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opt = *av;
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ac--; av++;
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switch (tcmd) {
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case TOK_PLAT_PREFIX:
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case TOK_CLAT_PREFIX:
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if (tcmd == TOK_PLAT_PREFIX) {
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NEED1("IPv6 plat_prefix required");
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} else {
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NEED1("IPv6 clat_prefix required");
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}
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if ((p = strchr(*av, '/')) != NULL)
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*p++ = '\0';
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2020-08-05 11:26:49 +00:00
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else
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errx(EX_USAGE,
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"Prefix length required: %s", *av);
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2019-03-18 11:44:53 +00:00
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if (inet_pton(AF_INET6, *av, &prefix) != 1)
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errx(EX_USAGE,
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"Bad prefix: %s", *av);
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plen = strtol(p, NULL, 10);
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if (ipfw_check_nat64prefix(&prefix, plen) != 0)
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errx(EX_USAGE,
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"Bad prefix length: %s", p);
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if (tcmd == TOK_PLAT_PREFIX) {
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cfg->plat_prefix = prefix;
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cfg->plat_plen = plen;
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} else {
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cfg->clat_prefix = prefix;
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cfg->clat_plen = plen;
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}
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ac--; av++;
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break;
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case TOK_LOG:
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cfg->flags |= NAT64_LOG;
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break;
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case TOK_LOGOFF:
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cfg->flags &= ~NAT64_LOG;
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break;
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case TOK_PRIVATE:
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cfg->flags |= NAT64_ALLOW_PRIVATE;
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break;
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case TOK_PRIVATEOFF:
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cfg->flags &= ~NAT64_ALLOW_PRIVATE;
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break;
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default:
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errx(EX_USAGE, "Can't change %s option", opt);
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}
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}
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if (do_set3(IP_FW_NAT64CLAT_CONFIG, &oh->opheader, sizeof(buf)) != 0)
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err(EX_OSERR, "nat64clat instance configuration failed");
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}
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/*
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* Destroys nat64clat instance.
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* Request: [ ipfw_obj_header ]
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*/
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static void
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|
|
nat64clat_destroy(const char *name, uint8_t set)
|
|
|
|
{
|
|
|
|
ipfw_obj_header oh;
|
|
|
|
|
|
|
|
memset(&oh, 0, sizeof(oh));
|
|
|
|
nat64clat_fill_ntlv(&oh.ntlv, name, set);
|
|
|
|
if (do_set3(IP_FW_NAT64CLAT_DESTROY, &oh.opheader, sizeof(oh)) != 0)
|
|
|
|
err(EX_OSERR, "failed to destroy nat instance %s", name);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get nat64clat instance statistics.
|
|
|
|
* Request: [ ipfw_obj_header ]
|
|
|
|
* Reply: [ ipfw_obj_header ipfw_obj_ctlv [ uint64_t x N ] ]
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
nat64clat_get_stats(const char *name, uint8_t set,
|
|
|
|
struct ipfw_nat64clat_stats *stats)
|
|
|
|
{
|
|
|
|
ipfw_obj_header *oh;
|
|
|
|
ipfw_obj_ctlv *oc;
|
|
|
|
size_t sz;
|
|
|
|
|
|
|
|
sz = sizeof(*oh) + sizeof(*oc) + sizeof(*stats);
|
|
|
|
oh = calloc(1, sz);
|
|
|
|
nat64clat_fill_ntlv(&oh->ntlv, name, set);
|
|
|
|
if (do_get3(IP_FW_NAT64CLAT_STATS, &oh->opheader, &sz) == 0) {
|
|
|
|
oc = (ipfw_obj_ctlv *)(oh + 1);
|
|
|
|
memcpy(stats, oc + 1, sizeof(*stats));
|
|
|
|
free(oh);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
free(oh);
|
|
|
|
return (-1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
nat64clat_stats(const char *name, uint8_t set)
|
|
|
|
{
|
|
|
|
struct ipfw_nat64clat_stats stats;
|
|
|
|
|
|
|
|
if (nat64clat_get_stats(name, set, &stats) != 0)
|
|
|
|
err(EX_OSERR, "Error retrieving stats");
|
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
if (g_co.use_set != 0 || set != 0)
|
2019-03-18 11:44:53 +00:00
|
|
|
printf("set %u ", set);
|
|
|
|
printf("nat64clat %s\n", name);
|
|
|
|
|
|
|
|
printf("\t%ju packets translated from IPv6 to IPv4\n",
|
|
|
|
(uintmax_t)stats.opcnt64);
|
|
|
|
printf("\t%ju packets translated from IPv4 to IPv6\n",
|
|
|
|
(uintmax_t)stats.opcnt46);
|
|
|
|
printf("\t%ju IPv6 fragments created\n",
|
|
|
|
(uintmax_t)stats.ofrags);
|
|
|
|
printf("\t%ju IPv4 fragments received\n",
|
|
|
|
(uintmax_t)stats.ifrags);
|
|
|
|
printf("\t%ju output packets dropped due to no bufs, etc.\n",
|
|
|
|
(uintmax_t)stats.oerrors);
|
|
|
|
printf("\t%ju output packets discarded due to no IPv4 route\n",
|
|
|
|
(uintmax_t)stats.noroute4);
|
|
|
|
printf("\t%ju output packets discarded due to no IPv6 route\n",
|
|
|
|
(uintmax_t)stats.noroute6);
|
|
|
|
printf("\t%ju packets discarded due to unsupported protocol\n",
|
|
|
|
(uintmax_t)stats.noproto);
|
|
|
|
printf("\t%ju packets discarded due to memory allocation problems\n",
|
|
|
|
(uintmax_t)stats.nomem);
|
|
|
|
printf("\t%ju packets discarded due to some errors\n",
|
|
|
|
(uintmax_t)stats.dropped);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Reset nat64clat instance statistics specified by @oh->ntlv.
|
|
|
|
* Request: [ ipfw_obj_header ]
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
nat64clat_reset_stats(const char *name, uint8_t set)
|
|
|
|
{
|
|
|
|
ipfw_obj_header oh;
|
|
|
|
|
|
|
|
memset(&oh, 0, sizeof(oh));
|
|
|
|
nat64clat_fill_ntlv(&oh.ntlv, name, set);
|
|
|
|
if (do_set3(IP_FW_NAT64CLAT_RESET_STATS, &oh.opheader, sizeof(oh)) != 0)
|
|
|
|
err(EX_OSERR, "failed to reset stats for instance %s", name);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
nat64clat_show_cb(ipfw_nat64clat_cfg *cfg, const char *name, uint8_t set)
|
|
|
|
{
|
|
|
|
char plat_buf[INET6_ADDRSTRLEN], clat_buf[INET6_ADDRSTRLEN];
|
|
|
|
|
|
|
|
if (name != NULL && strcmp(cfg->name, name) != 0)
|
|
|
|
return (ESRCH);
|
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
if (g_co.use_set != 0 && cfg->set != set)
|
2019-03-18 11:44:53 +00:00
|
|
|
return (ESRCH);
|
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
if (g_co.use_set != 0 || cfg->set != 0)
|
2019-03-18 11:44:53 +00:00
|
|
|
printf("set %u ", cfg->set);
|
|
|
|
|
|
|
|
inet_ntop(AF_INET6, &cfg->clat_prefix, clat_buf, sizeof(clat_buf));
|
|
|
|
inet_ntop(AF_INET6, &cfg->plat_prefix, plat_buf, sizeof(plat_buf));
|
|
|
|
printf("nat64clat %s clat_prefix %s/%u plat_prefix %s/%u",
|
|
|
|
cfg->name, clat_buf, cfg->clat_plen, plat_buf, cfg->plat_plen);
|
|
|
|
if (cfg->flags & NAT64_LOG)
|
|
|
|
printf(" log");
|
|
|
|
if (cfg->flags & NAT64_ALLOW_PRIVATE)
|
|
|
|
printf(" allow_private");
|
|
|
|
printf("\n");
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2020-07-13 17:51:04 +00:00
|
|
|
nat64clat_destroy_cb(ipfw_nat64clat_cfg *cfg, const char *name __unused,
|
|
|
|
uint8_t set)
|
2019-03-18 11:44:53 +00:00
|
|
|
{
|
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
if (g_co.use_set != 0 && cfg->set != set)
|
2019-03-18 11:44:53 +00:00
|
|
|
return (ESRCH);
|
|
|
|
|
|
|
|
nat64clat_destroy(cfg->name, cfg->set);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Compare nat64clat instances names.
|
|
|
|
* Honor number comparison.
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
nat64name_cmp(const void *a, const void *b)
|
|
|
|
{
|
2020-07-13 17:51:04 +00:00
|
|
|
const ipfw_nat64clat_cfg *ca, *cb;
|
2019-03-18 11:44:53 +00:00
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
ca = (const ipfw_nat64clat_cfg *)a;
|
|
|
|
cb = (const ipfw_nat64clat_cfg *)b;
|
2019-03-18 11:44:53 +00:00
|
|
|
|
|
|
|
if (ca->set > cb->set)
|
|
|
|
return (1);
|
|
|
|
else if (ca->set < cb->set)
|
|
|
|
return (-1);
|
|
|
|
return (stringnum_cmp(ca->name, cb->name));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Retrieves nat64clat instance list from kernel,
|
|
|
|
* optionally sorts it and calls requested function for each instance.
|
|
|
|
*
|
|
|
|
* Request: [ ipfw_obj_lheader ]
|
|
|
|
* Reply: [ ipfw_obj_lheader ipfw_nat64clat_cfg x N ]
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
nat64clat_foreach(nat64clat_cb_t *f, const char *name, uint8_t set, int sort)
|
|
|
|
{
|
|
|
|
ipfw_obj_lheader *olh;
|
|
|
|
ipfw_nat64clat_cfg *cfg;
|
|
|
|
size_t sz;
|
2020-07-13 17:51:04 +00:00
|
|
|
uint32_t i;
|
2019-03-18 11:44:53 +00:00
|
|
|
|
|
|
|
/* Start with reasonable default */
|
|
|
|
sz = sizeof(*olh) + 16 * sizeof(*cfg);
|
|
|
|
for (;;) {
|
|
|
|
if ((olh = calloc(1, sz)) == NULL)
|
|
|
|
return (ENOMEM);
|
|
|
|
|
|
|
|
olh->size = sz;
|
|
|
|
if (do_get3(IP_FW_NAT64CLAT_LIST, &olh->opheader, &sz) != 0) {
|
|
|
|
sz = olh->size;
|
|
|
|
free(olh);
|
|
|
|
if (errno != ENOMEM)
|
|
|
|
return (errno);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sort != 0)
|
|
|
|
qsort(olh + 1, olh->count, olh->objsize,
|
|
|
|
nat64name_cmp);
|
|
|
|
|
|
|
|
cfg = (ipfw_nat64clat_cfg *)(olh + 1);
|
|
|
|
for (i = 0; i < olh->count; i++) {
|
2023-06-27 17:19:32 +00:00
|
|
|
(void)f(cfg, name, set); /* Ignore errors for now */
|
2019-03-18 11:44:53 +00:00
|
|
|
cfg = (ipfw_nat64clat_cfg *)((caddr_t)cfg +
|
|
|
|
olh->objsize);
|
|
|
|
}
|
|
|
|
free(olh);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|