2016-07-18 19:46:31 +00:00
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/*-
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* Copyright (c) 2016 Yandex LLC
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* Copyright (c) 2016 Andrey V. Elsukov <ae@FreeBSD.org>
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* All rights reserved.
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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/param.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 <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_nptv6.h>
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#include <arpa/inet.h>
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typedef int (nptv6_cb_t)(ipfw_nptv6_cfg *i, const char *name, uint8_t set);
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static int nptv6_foreach(nptv6_cb_t *f, const char *name, uint8_t set,
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int sort);
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static void nptv6_create(const char *name, uint8_t set, int ac, char **av);
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static void nptv6_destroy(const char *name, uint8_t set);
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static void nptv6_stats(const char *name, uint8_t set);
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2016-08-13 16:45:14 +00:00
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static void nptv6_reset_stats(const char *name, uint8_t set);
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2016-07-18 19:46:31 +00:00
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static int nptv6_show_cb(ipfw_nptv6_cfg *cfg, const char *name, uint8_t set);
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static int nptv6_destroy_cb(ipfw_nptv6_cfg *cfg, const char *name, uint8_t set);
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static struct _s_x nptv6cmds[] = {
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{ "create", TOK_CREATE },
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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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2016-08-13 16:45:14 +00:00
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static struct _s_x nptv6statscmds[] = {
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{ "reset", TOK_RESET },
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{ NULL, 0 }
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};
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2016-07-18 19:46:31 +00:00
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/*
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* This one handles all NPTv6-related commands
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* ipfw [set N] nptv6 NAME {create | config} ...
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2016-08-13 16:45:14 +00:00
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* ipfw [set N] nptv6 NAME stats [reset]
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2016-07-18 19:46:31 +00:00
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* ipfw [set N] nptv6 {NAME | all} destroy
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* ipfw [set N] nptv6 {NAME | all} {list | show}
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*/
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#define nptv6_check_name table_check_name
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void
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ipfw_nptv6_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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2016-07-18 19:46:31 +00:00
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else
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set = 0;
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ac--; av++;
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NEED1("nptv6 needs instance name");
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name = *av;
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if (nptv6_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, "nptv6 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("nptv6 needs command");
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tcmd = get_token(nptv6cmds, *av, "nptv6 command");
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if (name == NULL && tcmd != TOK_DESTROY && tcmd != TOK_LIST)
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errx(EX_USAGE, "nptv6 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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nptv6_create(name, set, ac, av);
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break;
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case TOK_LIST:
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nptv6_foreach(nptv6_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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nptv6_foreach(nptv6_destroy_cb, NULL, set, 0);
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else
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nptv6_destroy(name, set);
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break;
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case TOK_STATS:
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2016-08-13 16:45:14 +00:00
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ac--; av++;
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if (ac == 0) {
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nptv6_stats(name, set);
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break;
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}
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tcmd = get_token(nptv6statscmds, *av, "stats command");
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if (tcmd == TOK_RESET)
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nptv6_reset_stats(name, set);
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2016-07-18 19:46:31 +00:00
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}
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}
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static void
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nptv6_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 nptv6newcmds[] = {
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{ "int_prefix", TOK_INTPREFIX },
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{ "ext_prefix", TOK_EXTPREFIX },
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{ "prefixlen", TOK_PREFIXLEN },
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2018-11-12 11:20:59 +00:00
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{ "ext_if", TOK_EXTIF },
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2016-07-18 19:46:31 +00:00
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{ NULL, 0 }
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};
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static void
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nptv6_parse_prefix(const char *arg, struct in6_addr *prefix, int *len)
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{
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char *p, *l;
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p = strdup(arg);
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if (p == NULL)
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err(EX_OSERR, NULL);
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if ((l = strchr(p, '/')) != NULL)
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*l++ = '\0';
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if (inet_pton(AF_INET6, p, prefix) != 1)
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errx(EX_USAGE, "Bad prefix: %s", p);
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if (l != NULL) {
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*len = (int)strtol(l, &l, 10);
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if (*l != '\0' || *len <= 0 || *len > 64)
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errx(EX_USAGE, "Bad prefix length: %s", arg);
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} else
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*len = 0;
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free(p);
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}
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/*
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* Creates new nptv6 instance
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* ipfw nptv6 <NAME> create int_prefix <prefix> ext_prefix <prefix>
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* Request: [ ipfw_obj_lheader ipfw_nptv6_cfg ]
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*/
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#define NPTV6_HAS_INTPREFIX 0x01
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#define NPTV6_HAS_EXTPREFIX 0x02
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#define NPTV6_HAS_PREFIXLEN 0x04
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static void
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nptv6_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_nptv6_cfg)];
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struct in6_addr mask;
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ipfw_nptv6_cfg *cfg;
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ipfw_obj_lheader *olh;
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int tcmd, flags, plen;
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2020-07-13 17:51:04 +00:00
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char *p;
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2016-07-18 19:46:31 +00:00
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plen = 0;
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memset(buf, 0, sizeof(buf));
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olh = (ipfw_obj_lheader *)buf;
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cfg = (ipfw_nptv6_cfg *)(olh + 1);
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cfg->set = set;
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flags = 0;
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while (ac > 0) {
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tcmd = get_token(nptv6newcmds, *av, "option");
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ac--; av++;
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switch (tcmd) {
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case TOK_INTPREFIX:
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NEED1("IPv6 prefix required");
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nptv6_parse_prefix(*av, &cfg->internal, &plen);
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flags |= NPTV6_HAS_INTPREFIX;
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if (plen > 0)
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goto check_prefix;
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ac--; av++;
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break;
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case TOK_EXTPREFIX:
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2018-11-12 11:20:59 +00:00
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if (flags & NPTV6_HAS_EXTPREFIX)
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errx(EX_USAGE,
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"Only one ext_prefix or ext_if allowed");
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2016-07-18 19:46:31 +00:00
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NEED1("IPv6 prefix required");
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nptv6_parse_prefix(*av, &cfg->external, &plen);
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flags |= NPTV6_HAS_EXTPREFIX;
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if (plen > 0)
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goto check_prefix;
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ac--; av++;
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break;
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2018-11-12 11:20:59 +00:00
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case TOK_EXTIF:
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if (flags & NPTV6_HAS_EXTPREFIX)
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errx(EX_USAGE,
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"Only one ext_prefix or ext_if allowed");
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NEED1("Interface name required");
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if (strlen(*av) >= sizeof(cfg->if_name))
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errx(EX_USAGE, "Invalid interface name");
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flags |= NPTV6_HAS_EXTPREFIX;
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cfg->flags |= NPTV6_DYNAMIC_PREFIX;
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strncpy(cfg->if_name, *av, sizeof(cfg->if_name));
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ac--; av++;
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break;
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2016-07-18 19:46:31 +00:00
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case TOK_PREFIXLEN:
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NEED1("IPv6 prefix length required");
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plen = strtol(*av, &p, 10);
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check_prefix:
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if (*p != '\0' || plen < 8 || plen > 64)
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errx(EX_USAGE, "wrong prefix length: %s", *av);
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/* RFC 6296 Sec. 3.1 */
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if (cfg->plen > 0 && cfg->plen != plen) {
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warnx("Prefix length mismatch (%d vs %d). "
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"It was extended up to %d",
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cfg->plen, plen, MAX(plen, cfg->plen));
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plen = MAX(plen, cfg->plen);
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}
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cfg->plen = plen;
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flags |= NPTV6_HAS_PREFIXLEN;
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ac--; av++;
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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 & NPTV6_HAS_INTPREFIX) != NPTV6_HAS_INTPREFIX)
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errx(EX_USAGE, "int_prefix required");
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if ((flags & NPTV6_HAS_EXTPREFIX) != NPTV6_HAS_EXTPREFIX)
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2018-11-12 11:20:59 +00:00
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errx(EX_USAGE, "ext_prefix or ext_if required");
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2016-07-18 19:46:31 +00:00
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if ((flags & NPTV6_HAS_PREFIXLEN) != NPTV6_HAS_PREFIXLEN)
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errx(EX_USAGE, "prefixlen required");
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n2mask(&mask, cfg->plen);
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APPLY_MASK(&cfg->internal, &mask);
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2018-11-12 11:20:59 +00:00
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if ((cfg->flags & NPTV6_DYNAMIC_PREFIX) == 0)
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APPLY_MASK(&cfg->external, &mask);
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2016-07-18 19:46:31 +00:00
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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_NPTV6_CREATE, &olh->opheader, sizeof(buf)) != 0)
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err(EX_OSERR, "nptv6 instance creation failed");
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}
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/*
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* Destroys NPTv6 instance.
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* Request: [ ipfw_obj_header ]
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*/
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static void
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nptv6_destroy(const char *name, uint8_t set)
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{
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ipfw_obj_header oh;
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memset(&oh, 0, sizeof(oh));
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nptv6_fill_ntlv(&oh.ntlv, name, set);
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if (do_set3(IP_FW_NPTV6_DESTROY, &oh.opheader, sizeof(oh)) != 0)
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err(EX_OSERR, "failed to destroy nat instance %s", name);
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}
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/*
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* Get NPTv6 instance statistics.
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* Request: [ ipfw_obj_header ]
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* Reply: [ ipfw_obj_header ipfw_obj_ctlv [ uint64_t x N ] ]
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*/
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static int
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nptv6_get_stats(const char *name, uint8_t set, struct ipfw_nptv6_stats *stats)
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{
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ipfw_obj_header *oh;
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ipfw_obj_ctlv *oc;
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size_t sz;
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sz = sizeof(*oh) + sizeof(*oc) + sizeof(*stats);
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oh = calloc(1, sz);
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nptv6_fill_ntlv(&oh->ntlv, name, set);
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if (do_get3(IP_FW_NPTV6_STATS, &oh->opheader, &sz) == 0) {
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oc = (ipfw_obj_ctlv *)(oh + 1);
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memcpy(stats, oc + 1, sizeof(*stats));
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free(oh);
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return (0);
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}
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free(oh);
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return (-1);
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}
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static void
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nptv6_stats(const char *name, uint8_t set)
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{
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struct ipfw_nptv6_stats stats;
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if (nptv6_get_stats(name, set, &stats) != 0)
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err(EX_OSERR, "Error retrieving stats");
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2020-07-13 17:51:04 +00:00
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if (g_co.use_set != 0 || set != 0)
|
2016-08-14 13:17:55 +00:00
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printf("set %u ", set);
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printf("nptv6 %s\n", name);
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printf("\t%ju packets translated (internal to external)\n",
|
2016-07-18 19:46:31 +00:00
|
|
|
(uintmax_t)stats.in2ex);
|
2016-08-14 13:17:55 +00:00
|
|
|
printf("\t%ju packets translated (external to internal)\n",
|
2016-07-18 19:46:31 +00:00
|
|
|
(uintmax_t)stats.ex2in);
|
2016-08-14 13:17:55 +00:00
|
|
|
printf("\t%ju packets dropped due to some error\n",
|
2016-07-18 19:46:31 +00:00
|
|
|
(uintmax_t)stats.dropped);
|
|
|
|
}
|
|
|
|
|
2016-08-13 16:45:14 +00:00
|
|
|
/*
|
|
|
|
* Reset NPTv6 instance statistics specified by @oh->ntlv.
|
|
|
|
* Request: [ ipfw_obj_header ]
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
nptv6_reset_stats(const char *name, uint8_t set)
|
|
|
|
{
|
|
|
|
ipfw_obj_header oh;
|
|
|
|
|
|
|
|
memset(&oh, 0, sizeof(oh));
|
|
|
|
nptv6_fill_ntlv(&oh.ntlv, name, set);
|
|
|
|
if (do_set3(IP_FW_NPTV6_RESET_STATS, &oh.opheader, sizeof(oh)) != 0)
|
|
|
|
err(EX_OSERR, "failed to reset stats for instance %s", name);
|
|
|
|
}
|
|
|
|
|
2016-07-18 19:46:31 +00:00
|
|
|
static int
|
|
|
|
nptv6_show_cb(ipfw_nptv6_cfg *cfg, const char *name, uint8_t set)
|
|
|
|
{
|
|
|
|
char abuf[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)
|
2016-07-18 19:46:31 +00:00
|
|
|
return (ESRCH);
|
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
if (g_co.use_set != 0 || cfg->set != 0)
|
2016-07-18 19:46:31 +00:00
|
|
|
printf("set %u ", cfg->set);
|
|
|
|
inet_ntop(AF_INET6, &cfg->internal, abuf, sizeof(abuf));
|
|
|
|
printf("nptv6 %s int_prefix %s ", cfg->name, abuf);
|
2018-11-12 11:20:59 +00:00
|
|
|
if (cfg->flags & NPTV6_DYNAMIC_PREFIX)
|
|
|
|
printf("ext_if %s ", cfg->if_name);
|
|
|
|
else {
|
|
|
|
inet_ntop(AF_INET6, &cfg->external, abuf, sizeof(abuf));
|
|
|
|
printf("ext_prefix %s ", abuf);
|
|
|
|
}
|
|
|
|
printf("prefixlen %u\n", cfg->plen);
|
2016-07-18 19:46:31 +00:00
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
2020-07-13 17:51:04 +00:00
|
|
|
nptv6_destroy_cb(ipfw_nptv6_cfg *cfg, const char *name __unused, uint8_t set)
|
2016-07-18 19:46:31 +00:00
|
|
|
{
|
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
if (g_co.use_set != 0 && cfg->set != set)
|
2016-07-18 19:46:31 +00:00
|
|
|
return (ESRCH);
|
|
|
|
|
|
|
|
nptv6_destroy(cfg->name, cfg->set);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Compare NPTv6 instances names.
|
|
|
|
* Honor number comparison.
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
nptv6name_cmp(const void *a, const void *b)
|
|
|
|
{
|
2020-07-13 17:51:04 +00:00
|
|
|
const ipfw_nptv6_cfg *ca, *cb;
|
2016-07-18 19:46:31 +00:00
|
|
|
|
2020-07-13 17:51:04 +00:00
|
|
|
ca = (const ipfw_nptv6_cfg *)a;
|
|
|
|
cb = (const ipfw_nptv6_cfg *)b;
|
2016-07-18 19:46:31 +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 NPTv6 instance list from kernel,
|
|
|
|
* Request: [ ipfw_obj_lheader ]
|
|
|
|
* Reply: [ ipfw_obj_lheader ipfw_nptv6_cfg x N ]
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
nptv6_foreach(nptv6_cb_t *f, const char *name, uint8_t set, int sort)
|
|
|
|
{
|
|
|
|
ipfw_obj_lheader *olh;
|
|
|
|
ipfw_nptv6_cfg *cfg;
|
|
|
|
size_t sz;
|
2020-07-13 17:51:04 +00:00
|
|
|
uint32_t i;
|
2016-07-18 19:46:31 +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_NPTV6_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, nptv6name_cmp);
|
|
|
|
|
|
|
|
cfg = (ipfw_nptv6_cfg *)(olh + 1);
|
|
|
|
for (i = 0; i < olh->count; i++) {
|
2023-06-27 17:19:32 +00:00
|
|
|
(void)f(cfg, name, set);
|
2016-07-18 19:46:31 +00:00
|
|
|
cfg = (ipfw_nptv6_cfg *)((caddr_t)cfg + olh->objsize);
|
|
|
|
}
|
|
|
|
free(olh);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|