sbin/ipfw/nat64lsn.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2015-2019 Yandex LLC
   5  * Copyright (c) 2015-2016 Alexander V. Chernikov <melifaro@FreeBSD.org>
   6  * Copyright (c) 2015-2019 Andrey V. Elsukov <ae@FreeBSD.org>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <sys/types.h>
  31 #include <sys/socket.h>
  32
  33 #include "ipfw2.h"
  34
  35 #include <ctype.h>
  36 #include <err.h>
  37 #include <errno.h>
  38 #include <inttypes.h>
  39 #include <netdb.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <sysexits.h>
  44
  45 #include <net/if.h>
  46 #include <netinet/in.h>
  47 #include <netinet/ip_fw.h>
  48 #include <netinet6/ip_fw_nat64.h>
  49 #include <arpa/inet.h>
  50
  51 static void nat64lsn_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name,
  52     uint8_t set);
  53 typedef int (nat64lsn_cb_t)(ipfw_nat64lsn_cfg *cfg, const char *name,
  54     uint8_t set);
  55 static int nat64lsn_foreach(nat64lsn_cb_t *f, const char *name, uint8_t set,
  56     int sort);
  57
  58 static void nat64lsn_create(const char *name, uint8_t set, int ac, char **av);
  59 static void nat64lsn_config(const char *name, uint8_t set, int ac, char **av);
  60 static void nat64lsn_destroy(const char *name, uint8_t set);
  61 static void nat64lsn_stats(const char *name, uint8_t set);
  62 static void nat64lsn_reset_stats(const char *name, uint8_t set);
  63 static int nat64lsn_show_cb(ipfw_nat64lsn_cfg *cfg, const char *name,
  64     uint8_t set);
  65 static int nat64lsn_destroy_cb(ipfw_nat64lsn_cfg *cfg, const char *name,
  66     uint8_t set);
  67 static int nat64lsn_states_cb(ipfw_nat64lsn_cfg *cfg, const char *name,
  68     uint8_t set);
  69
  70 static struct _s_x nat64cmds[] = {
  71       { "create",       TOK_CREATE },
  72       { "config",       TOK_CONFIG },
  73       { "destroy",      TOK_DESTROY },
  74       { "list",         TOK_LIST },
  75       { "show",         TOK_LIST },
  76       { "stats",        TOK_STATS },
  77       { NULL, 0 }
  78 };
  79
  80 static uint64_t
  81 nat64lsn_print_states(void *buf)
  82 {
  83         char s[INET6_ADDRSTRLEN], a[INET_ADDRSTRLEN], f[INET_ADDRSTRLEN];
  84         const char *proto;
  85         char sflags[4], *sf;
  86         ipfw_obj_header *oh;
  87         ipfw_obj_data *od;
  88         ipfw_nat64lsn_stg_v1 *stg;
  89         ipfw_nat64lsn_state_v1 *ste;
  90         uint64_t next_idx;
  91         uint32_t i;
  92         int sz;
  93
  94         oh = (ipfw_obj_header *)buf;
  95         od = (ipfw_obj_data *)(oh + 1);
  96         stg = (ipfw_nat64lsn_stg_v1 *)(od + 1);
  97         sz = od->head.length - sizeof(*od);
  98         next_idx = 0;
  99         proto = NULL;
 100         while (sz > 0 && next_idx != 0xFF) {
 101                 next_idx = stg->next.index;
 102                 sz -= sizeof(*stg);
 103                 if (stg->count == 0) {
 104                         stg++;
 105                         continue;
 106                 }
 107                 /*
 108                  * NOTE: addresses are in network byte order,
 109                  * ports are in host byte order.
 110                  */
 111                 inet_ntop(AF_INET, &stg->alias4, a, sizeof(a));
 112                 ste = (ipfw_nat64lsn_state_v1 *)(stg + 1);
 113                 for (i = 0; i < stg->count && sz > 0; i++) {
 114                         sf = sflags;
 115                         inet_ntop(AF_INET6, &ste->host6, s, sizeof(s));
 116                         inet_ntop(AF_INET, &ste->daddr, f, sizeof(f));
 117                         switch (ste->proto) {
 118                         case IPPROTO_TCP:
 119                                 proto = "TCP";
 120                                 if (ste->flags & 0x02)
 121                                         *sf++ = 'S';
 122                                 if (ste->flags & 0x04)
 123                                         *sf++ = 'E';
 124                                 if (ste->flags & 0x01)
 125                                         *sf++ = 'F';
 126                                 break;
 127                         case IPPROTO_UDP:
 128                                 proto = "UDP";
 129                                 break;
 130                         case IPPROTO_ICMP:
 131                                 proto = "ICMPv6";
 132                                 break;
 133                         }
 134                         *sf = '\0';
 135                         switch (ste->proto) {
 136                         case IPPROTO_TCP:
 137                         case IPPROTO_UDP:
 138                                 printf("%s:%d\t%s:%d\t%s\t%s\t%d\t%s:%d\n",
 139                                     s, ste->sport, a, ste->aport, proto,
 140                                     sflags, ste->idle, f, ste->dport);
 141                                 break;
 142                         case IPPROTO_ICMP:
 143                                 printf("%s\t%s\t%s\t\t%d\t%s\n",
 144                                     s, a, proto, ste->idle, f);
 145                                 break;
 146                         default:
 147                                 printf("%s\t%s\t%d\t\t%d\t%s\n",
 148                                     s, a, ste->proto, ste->idle, f);
 149                         }
 150                         ste++;
 151                         sz -= sizeof(*ste);
 152                 }
 153                 stg = (ipfw_nat64lsn_stg_v1 *)ste;
 154         }
 155         return (next_idx);
 156 }
 157
 158 static int
 159 nat64lsn_states_cb(ipfw_nat64lsn_cfg *cfg, const char *name, uint8_t set)
 160 {
 161         ipfw_obj_header *oh;
 162         ipfw_obj_data *od;
 163         void *buf;
 164         uint64_t next_idx;
 165         size_t sz;
 166
 167         if (name != NULL && strcmp(cfg->name, name) != 0)
 168                 return (ESRCH);
 169
 170         if (set != 0 && cfg->set != set)
 171                 return (ESRCH);
 172
 173         next_idx = 0;
 174         sz = 4096;
 175         if ((buf = calloc(1, sz)) == NULL)
 176                 err(EX_OSERR, NULL);
 177         do {
 178                 oh = (ipfw_obj_header *)buf;
 179                 oh->opheader.version = 1; /* Force using ov new API */
 180                 od = (ipfw_obj_data *)(oh + 1);
 181                 nat64lsn_fill_ntlv(&oh->ntlv, cfg->name, set);
 182                 od->head.type = IPFW_TLV_OBJDATA;
 183                 od->head.length = sizeof(*od) + sizeof(next_idx);
 184                 *((uint64_t *)(od + 1)) = next_idx;
 185                 if (do_get3(IP_FW_NAT64LSN_LIST_STATES, &oh->opheader, &sz))
 186                         err(EX_OSERR, "Error reading nat64lsn states");
 187                 next_idx = nat64lsn_print_states(buf);
 188                 sz = 4096;
 189                 memset(buf, 0, sz);
 190         } while (next_idx != 0xFF);
 191
 192         free(buf);
 193         return (0);
 194 }
 195
 196 static struct _s_x nat64statscmds[] = {
 197       { "reset",        TOK_RESET },
 198       { NULL, 0 }
 199 };
 200
 201 static void
 202 ipfw_nat64lsn_stats_handler(const char *name, uint8_t set, int ac, char *av[])
 203 {
 204         int tcmd;
 205
 206         if (ac == 0) {
 207                 nat64lsn_stats(name, set);
 208                 return;
 209         }
 210         NEED1("nat64lsn stats needs command");
 211         tcmd = get_token(nat64statscmds, *av, "nat64lsn stats command");
 212         switch (tcmd) {
 213         case TOK_RESET:
 214                 nat64lsn_reset_stats(name, set);
 215         }
 216 }
 217
 218 static struct _s_x nat64listcmds[] = {
 219       { "states",       TOK_STATES },
 220       { "config",       TOK_CONFIG },
 221       { NULL, 0 }
 222 };
 223
 224 static void
 225 ipfw_nat64lsn_list_handler(const char *name, uint8_t set, int ac, char *av[])
 226 {
 227         int tcmd;
 228
 229         if (ac == 0) {
 230                 nat64lsn_foreach(nat64lsn_show_cb, name, set, 1);
 231                 return;
 232         }
 233         NEED1("nat64lsn list needs command");
 234         tcmd = get_token(nat64listcmds, *av, "nat64lsn list command");
 235         switch (tcmd) {
 236         case TOK_STATES:
 237                 nat64lsn_foreach(nat64lsn_states_cb, name, set, 1);
 238                 break;
 239         case TOK_CONFIG:
 240                 nat64lsn_foreach(nat64lsn_show_cb, name, set, 1);
 241         }
 242 }
 243
 244 /*
 245  * This one handles all nat64lsn-related commands
 246  *      ipfw [set N] nat64lsn NAME {create | config} ...
 247  *      ipfw [set N] nat64lsn NAME stats
 248  *      ipfw [set N] nat64lsn {NAME | all} destroy
 249  *      ipfw [set N] nat64lsn {NAME | all} {list | show} [config | states]
 250  */
 251 #define nat64lsn_check_name     table_check_name
 252 void
 253 ipfw_nat64lsn_handler(int ac, char *av[])
 254 {
 255         const char *name;
 256         int tcmd;
 257         uint8_t set;
 258
 259         if (g_co.use_set != 0)
 260                 set = g_co.use_set - 1;
 261         else
 262                 set = 0;
 263         ac--; av++;
 264
 265         NEED1("nat64lsn needs instance name");
 266         name = *av;
 267         if (nat64lsn_check_name(name) != 0) {
 268                 if (strcmp(name, "all") == 0)
 269                         name = NULL;
 270                 else
 271                         errx(EX_USAGE, "nat64lsn instance name %s is invalid",
 272                             name);
 273         }
 274         ac--; av++;
 275         NEED1("nat64lsn needs command");
 276
 277         tcmd = get_token(nat64cmds, *av, "nat64lsn command");
 278         if (name == NULL && tcmd != TOK_DESTROY && tcmd != TOK_LIST)
 279                 errx(EX_USAGE, "nat64lsn instance name required");
 280         switch (tcmd) {
 281         case TOK_CREATE:
 282                 ac--; av++;
 283                 nat64lsn_create(name, set, ac, av);
 284                 break;
 285         case TOK_CONFIG:
 286                 ac--; av++;
 287                 nat64lsn_config(name, set, ac, av);
 288                 break;
 289         case TOK_LIST:
 290                 ac--; av++;
 291                 ipfw_nat64lsn_list_handler(name, set, ac, av);
 292                 break;
 293         case TOK_DESTROY:
 294                 if (name == NULL)
 295                         nat64lsn_foreach(nat64lsn_destroy_cb, NULL, set, 0);
 296                 else
 297                         nat64lsn_destroy(name, set);
 298                 break;
 299         case TOK_STATS:
 300                 ac--; av++;
 301                 ipfw_nat64lsn_stats_handler(name, set, ac, av);
 302         }
 303 }
 304
 305 static void
 306 nat64lsn_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set)
 307 {
 308
 309         ntlv->head.type = IPFW_TLV_EACTION_NAME(1); /* it doesn't matter */
 310         ntlv->head.length = sizeof(ipfw_obj_ntlv);
 311         ntlv->idx = 1;
 312         ntlv->set = set;
 313         strlcpy(ntlv->name, name, sizeof(ntlv->name));
 314 }
 315
 316 static void
 317 nat64lsn_apply_mask(int af, void *prefix, uint16_t plen)
 318 {
 319         struct in6_addr mask6, *p6;
 320         struct in_addr mask4, *p4;
 321
 322         if (af == AF_INET) {
 323                 p4 = (struct in_addr *)prefix;
 324                 mask4.s_addr = htonl(~((1 << (32 - plen)) - 1));
 325                 p4->s_addr &= mask4.s_addr;
 326         } else if (af == AF_INET6) {
 327                 p6 = (struct in6_addr *)prefix;
 328                 n2mask(&mask6, plen);
 329                 APPLY_MASK(p6, &mask6);
 330         }
 331 }
 332
 333 static void
 334 nat64lsn_parse_prefix(const char *arg, int af, void *prefix, uint16_t *plen)
 335 {
 336         char *p, *l;
 337
 338         p = strdup(arg);
 339         if (p == NULL)
 340                 err(EX_OSERR, NULL);
 341         if ((l = strchr(p, '/')) != NULL)
 342                 *l++ = '\0';
 343         if (l == NULL)
 344                 errx(EX_USAGE, "Prefix length required");
 345         if (inet_pton(af, p, prefix) != 1)
 346                 errx(EX_USAGE, "Bad prefix: %s", p);
 347         *plen = (uint16_t)strtol(l, &l, 10);
 348         if (*l != '\0' || *plen == 0 || (af == AF_INET && *plen > 32) ||
 349             (af == AF_INET6 && *plen > 96))
 350                 errx(EX_USAGE, "Bad prefix length: %s", arg);
 351         nat64lsn_apply_mask(af, prefix, *plen);
 352         free(p);
 353 }
 354
 355 static uint32_t
 356 nat64lsn_parse_int(const char *arg, const char *desc)
 357 {
 358         char *p;
 359         uint32_t val;
 360
 361         val = (uint32_t)strtol(arg, &p, 10);
 362         if (*p != '\0')
 363                 errx(EX_USAGE, "Invalid %s value: %s\n", desc, arg);
 364         return (val);
 365 }
 366
 367 static struct _s_x nat64newcmds[] = {
 368       { "prefix6",      TOK_PREFIX6 },
 369       { "jmaxlen",      TOK_JMAXLEN },
 370       { "prefix4",      TOK_PREFIX4 },
 371       { "host_del_age", TOK_HOST_DEL_AGE },
 372       { "pg_del_age",   TOK_PG_DEL_AGE },
 373       { "tcp_syn_age",  TOK_TCP_SYN_AGE },
 374       { "tcp_close_age",TOK_TCP_CLOSE_AGE },
 375       { "tcp_est_age",  TOK_TCP_EST_AGE },
 376       { "udp_age",      TOK_UDP_AGE },
 377       { "icmp_age",     TOK_ICMP_AGE },
 378       { "states_chunks",TOK_STATES_CHUNKS },
 379       { "log",          TOK_LOG },
 380       { "-log",         TOK_LOGOFF },
 381       { "allow_private", TOK_PRIVATE },
 382       { "-allow_private", TOK_PRIVATEOFF },
 383       /* for compatibility with old configurations */
 384       { "max_ports",    TOK_MAX_PORTS },        /* unused */
 385       { NULL, 0 }
 386 };
 387
 388 /*
 389  * Creates new nat64lsn instance
 390  * ipfw nat64lsn <NAME> create
 391  *     [ max_ports <N> ]
 392  * Request: [ ipfw_obj_lheader ipfw_nat64lsn_cfg ]
 393  */
 394 #define NAT64LSN_HAS_PREFIX4    0x01
 395 #define NAT64LSN_HAS_PREFIX6    0x02
 396 static void
 397 nat64lsn_create(const char *name, uint8_t set, int ac, char **av)
 398 {
 399         char buf[sizeof(ipfw_obj_lheader) + sizeof(ipfw_nat64lsn_cfg)];
 400         ipfw_nat64lsn_cfg *cfg;
 401         ipfw_obj_lheader *olh;
 402         int tcmd, flags;
 403         char *opt;
 404
 405         memset(&buf, 0, sizeof(buf));
 406         olh = (ipfw_obj_lheader *)buf;
 407         cfg = (ipfw_nat64lsn_cfg *)(olh + 1);
 408
 409         /* Some reasonable defaults */
 410         inet_pton(AF_INET6, "64:ff9b::", &cfg->prefix6);
 411         cfg->plen6 = 96;
 412         cfg->set = set;
 413         cfg->max_ports = NAT64LSN_MAX_PORTS;
 414         cfg->jmaxlen = NAT64LSN_JMAXLEN;
 415         cfg->nh_delete_delay = NAT64LSN_HOST_AGE;
 416         cfg->pg_delete_delay = NAT64LSN_PG_AGE;
 417         cfg->st_syn_ttl = NAT64LSN_TCP_SYN_AGE;
 418         cfg->st_estab_ttl = NAT64LSN_TCP_EST_AGE;
 419         cfg->st_close_ttl = NAT64LSN_TCP_FIN_AGE;
 420         cfg->st_udp_ttl = NAT64LSN_UDP_AGE;
 421         cfg->st_icmp_ttl = NAT64LSN_ICMP_AGE;
 422         flags = NAT64LSN_HAS_PREFIX6;
 423         while (ac > 0) {
 424                 tcmd = get_token(nat64newcmds, *av, "option");
 425                 opt = *av;
 426                 ac--; av++;
 427
 428                 switch (tcmd) {
 429                 case TOK_PREFIX4:
 430                         NEED1("IPv4 prefix required");
 431                         nat64lsn_parse_prefix(*av, AF_INET, &cfg->prefix4,
 432                             &cfg->plen4);
 433                         flags |= NAT64LSN_HAS_PREFIX4;
 434                         ac--; av++;
 435                         break;
 436                 case TOK_PREFIX6:
 437                         NEED1("IPv6 prefix required");
 438                         nat64lsn_parse_prefix(*av, AF_INET6, &cfg->prefix6,
 439                             &cfg->plen6);
 440                         if (ipfw_check_nat64prefix(&cfg->prefix6,
 441                             cfg->plen6) != 0 &&
 442                             !IN6_IS_ADDR_UNSPECIFIED(&cfg->prefix6))
 443                                 errx(EX_USAGE, "Bad prefix6 %s", *av);
 444
 445                         ac--; av++;
 446                         break;
 447                 case TOK_JMAXLEN:
 448                         NEED1("job queue length required");
 449                         cfg->jmaxlen = nat64lsn_parse_int(*av, opt);
 450                         ac--; av++;
 451                         break;
 452                 case TOK_MAX_PORTS:
 453                         NEED1("Max per-user ports required");
 454                         cfg->max_ports = nat64lsn_parse_int(*av, opt);
 455                         ac--; av++;
 456                         break;
 457                 case TOK_HOST_DEL_AGE:
 458                         NEED1("host delete delay required");
 459                         cfg->nh_delete_delay = (uint16_t)nat64lsn_parse_int(
 460                             *av, opt);
 461                         ac--; av++;
 462                         break;
 463                 case TOK_PG_DEL_AGE:
 464                         NEED1("portgroup delete delay required");
 465                         cfg->pg_delete_delay = (uint16_t)nat64lsn_parse_int(
 466                             *av, opt);
 467                         ac--; av++;
 468                         break;
 469                 case TOK_TCP_SYN_AGE:
 470                         NEED1("tcp syn age required");
 471                         cfg->st_syn_ttl = (uint16_t)nat64lsn_parse_int(
 472                             *av, opt);
 473                         ac--; av++;
 474                         break;
 475                 case TOK_TCP_CLOSE_AGE:
 476                         NEED1("tcp close age required");
 477                         cfg->st_close_ttl = (uint16_t)nat64lsn_parse_int(
 478                             *av, opt);
 479                         ac--; av++;
 480                         break;
 481                 case TOK_TCP_EST_AGE:
 482                         NEED1("tcp est age required");
 483                         cfg->st_estab_ttl = (uint16_t)nat64lsn_parse_int(
 484                             *av, opt);
 485                         ac--; av++;
 486                         break;
 487                 case TOK_UDP_AGE:
 488                         NEED1("udp age required");
 489                         cfg->st_udp_ttl = (uint16_t)nat64lsn_parse_int(
 490                             *av, opt);
 491                         ac--; av++;
 492                         break;
 493                 case TOK_ICMP_AGE:
 494                         NEED1("icmp age required");
 495                         cfg->st_icmp_ttl = (uint16_t)nat64lsn_parse_int(
 496                             *av, opt);
 497                         ac--; av++;
 498                         break;
 499                 case TOK_STATES_CHUNKS:
 500                         NEED1("number of chunks required");
 501                         cfg->states_chunks = (uint8_t)nat64lsn_parse_int(
 502                             *av, opt);
 503                         ac--; av++;
 504                         break;
 505                 case TOK_LOG:
 506                         cfg->flags |= NAT64_LOG;
 507                         break;
 508                 case TOK_LOGOFF:
 509                         cfg->flags &= ~NAT64_LOG;
 510                         break;
 511                 case TOK_PRIVATE:
 512                         cfg->flags |= NAT64_ALLOW_PRIVATE;
 513                         break;
 514                 case TOK_PRIVATEOFF:
 515                         cfg->flags &= ~NAT64_ALLOW_PRIVATE;
 516                         break;
 517                 }
 518         }
 519
 520         /* Check validness */
 521         if ((flags & NAT64LSN_HAS_PREFIX4) != NAT64LSN_HAS_PREFIX4)
 522                 errx(EX_USAGE, "prefix4 required");
 523
 524         olh->count = 1;
 525         olh->objsize = sizeof(*cfg);
 526         olh->size = sizeof(buf);
 527         strlcpy(cfg->name, name, sizeof(cfg->name));
 528         if (do_set3(IP_FW_NAT64LSN_CREATE, &olh->opheader, sizeof(buf)) != 0)
 529                 err(EX_OSERR, "nat64lsn instance creation failed");
 530 }
 531
 532 /*
 533  * Configures existing nat64lsn instance
 534  * ipfw nat64lsn <NAME> config <options>
 535  * Request: [ ipfw_obj_header ipfw_nat64lsn_cfg ]
 536  */
 537 static void
 538 nat64lsn_config(const char *name, uint8_t set, int ac, char **av)
 539 {
 540         char buf[sizeof(ipfw_obj_header) + sizeof(ipfw_nat64lsn_cfg)];
 541         ipfw_nat64lsn_cfg *cfg;
 542         ipfw_obj_header *oh;
 543         size_t sz;
 544         char *opt;
 545         int tcmd;
 546
 547         if (ac == 0)
 548                 errx(EX_USAGE, "config options required");
 549         memset(&buf, 0, sizeof(buf));
 550         oh = (ipfw_obj_header *)buf;
 551         cfg = (ipfw_nat64lsn_cfg *)(oh + 1);
 552         sz = sizeof(buf);
 553
 554         nat64lsn_fill_ntlv(&oh->ntlv, name, set);
 555         if (do_get3(IP_FW_NAT64LSN_CONFIG, &oh->opheader, &sz) != 0)
 556                 err(EX_OSERR, "failed to get config for instance %s", name);
 557
 558         while (ac > 0) {
 559                 tcmd = get_token(nat64newcmds, *av, "option");
 560                 opt = *av;
 561                 ac--; av++;
 562
 563                 switch (tcmd) {
 564                 case TOK_MAX_PORTS:
 565                         NEED1("Max per-user ports required");
 566                         cfg->max_ports = nat64lsn_parse_int(*av, opt);
 567                         ac--; av++;
 568                         break;
 569                 case TOK_JMAXLEN:
 570                         NEED1("job queue length required");
 571                         cfg->jmaxlen = nat64lsn_parse_int(*av, opt);
 572                         ac--; av++;
 573                         break;
 574                 case TOK_HOST_DEL_AGE:
 575                         NEED1("host delete delay required");
 576                         cfg->nh_delete_delay = (uint16_t)nat64lsn_parse_int(
 577                             *av, opt);
 578                         ac--; av++;
 579                         break;
 580                 case TOK_PG_DEL_AGE:
 581                         NEED1("portgroup delete delay required");
 582                         cfg->pg_delete_delay = (uint16_t)nat64lsn_parse_int(
 583                             *av, opt);
 584                         ac--; av++;
 585                         break;
 586                 case TOK_TCP_SYN_AGE:
 587                         NEED1("tcp syn age required");
 588                         cfg->st_syn_ttl = (uint16_t)nat64lsn_parse_int(
 589                             *av, opt);
 590                         ac--; av++;
 591                         break;
 592                 case TOK_TCP_CLOSE_AGE:
 593                         NEED1("tcp close age required");
 594                         cfg->st_close_ttl = (uint16_t)nat64lsn_parse_int(
 595                             *av, opt);
 596                         ac--; av++;
 597                         break;
 598                 case TOK_TCP_EST_AGE:
 599                         NEED1("tcp est age required");
 600                         cfg->st_estab_ttl = (uint16_t)nat64lsn_parse_int(
 601                             *av, opt);
 602                         ac--; av++;
 603                         break;
 604                 case TOK_UDP_AGE:
 605                         NEED1("udp age required");
 606                         cfg->st_udp_ttl = (uint16_t)nat64lsn_parse_int(
 607                             *av, opt);
 608                         ac--; av++;
 609                         break;
 610                 case TOK_ICMP_AGE:
 611                         NEED1("icmp age required");
 612                         cfg->st_icmp_ttl = (uint16_t)nat64lsn_parse_int(
 613                             *av, opt);
 614                         ac--; av++;
 615                         break;
 616                 case TOK_STATES_CHUNKS:
 617                         NEED1("number of chunks required");
 618                         cfg->states_chunks = (uint8_t)nat64lsn_parse_int(
 619                             *av, opt);
 620                         ac--; av++;
 621                         break;
 622                 case TOK_LOG:
 623                         cfg->flags |= NAT64_LOG;
 624                         break;
 625                 case TOK_LOGOFF:
 626                         cfg->flags &= ~NAT64_LOG;
 627                         break;
 628                 case TOK_PRIVATE:
 629                         cfg->flags |= NAT64_ALLOW_PRIVATE;
 630                         break;
 631                 case TOK_PRIVATEOFF:
 632                         cfg->flags &= ~NAT64_ALLOW_PRIVATE;
 633                         break;
 634                 default:
 635                         errx(EX_USAGE, "Can't change %s option", opt);
 636                 }
 637         }
 638
 639         if (do_set3(IP_FW_NAT64LSN_CONFIG, &oh->opheader, sizeof(buf)) != 0)
 640                 err(EX_OSERR, "nat64lsn instance configuration failed");
 641 }
 642
 643 /*
 644  * Reset nat64lsn instance statistics specified by @oh->ntlv.
 645  * Request: [ ipfw_obj_header ]
 646  */
 647 static void
 648 nat64lsn_reset_stats(const char *name, uint8_t set)
 649 {
 650         ipfw_obj_header oh;
 651
 652         memset(&oh, 0, sizeof(oh));
 653         nat64lsn_fill_ntlv(&oh.ntlv, name, set);
 654         if (do_set3(IP_FW_NAT64LSN_RESET_STATS, &oh.opheader, sizeof(oh)) != 0)
 655                 err(EX_OSERR, "failed to reset stats for instance %s", name);
 656 }
 657
 658 /*
 659  * Destroys nat64lsn instance specified by @oh->ntlv.
 660  * Request: [ ipfw_obj_header ]
 661  */
 662 static void
 663 nat64lsn_destroy(const char *name, uint8_t set)
 664 {
 665         ipfw_obj_header oh;
 666
 667         memset(&oh, 0, sizeof(oh));
 668         nat64lsn_fill_ntlv(&oh.ntlv, name, set);
 669         if (do_set3(IP_FW_NAT64LSN_DESTROY, &oh.opheader, sizeof(oh)) != 0)
 670                 err(EX_OSERR, "failed to destroy nat instance %s", name);
 671 }
 672
 673 /*
 674  * Get nat64lsn instance statistics.
 675  * Request: [ ipfw_obj_header ]
 676  * Reply: [ ipfw_obj_header ipfw_obj_ctlv [ uint64_t x N ] ]
 677  */
 678 static int
 679 nat64lsn_get_stats(const char *name, uint8_t set,
 680     struct ipfw_nat64lsn_stats *stats)
 681 {
 682         ipfw_obj_header *oh;
 683         ipfw_obj_ctlv *oc;
 684         size_t sz;
 685
 686         sz = sizeof(*oh) + sizeof(*oc) + sizeof(*stats);
 687         oh = calloc(1, sz);
 688         nat64lsn_fill_ntlv(&oh->ntlv, name, set);
 689         if (do_get3(IP_FW_NAT64LSN_STATS, &oh->opheader, &sz) == 0) {
 690                 oc = (ipfw_obj_ctlv *)(oh + 1);
 691                 memcpy(stats, oc + 1, sizeof(*stats));
 692                 free(oh);
 693                 return (0);
 694         }
 695         free(oh);
 696         return (-1);
 697 }
 698
 699 static void
 700 nat64lsn_stats(const char *name, uint8_t set)
 701 {
 702         struct ipfw_nat64lsn_stats stats;
 703
 704         if (nat64lsn_get_stats(name, set, &stats) != 0)
 705                 err(EX_OSERR, "Error retrieving stats");
 706
 707         if (g_co.use_set != 0 || set != 0)
 708                 printf("set %u ", set);
 709         printf("nat64lsn %s\n", name);
 710         printf("\t%ju packets translated from IPv6 to IPv4\n",
 711             (uintmax_t)stats.opcnt64);
 712         printf("\t%ju packets translated from IPv4 to IPv6\n",
 713             (uintmax_t)stats.opcnt46);
 714         printf("\t%ju IPv6 fragments created\n",
 715             (uintmax_t)stats.ofrags);
 716         printf("\t%ju IPv4 fragments received\n",
 717             (uintmax_t)stats.ifrags);
 718         printf("\t%ju output packets dropped due to no bufs, etc.\n",
 719             (uintmax_t)stats.oerrors);
 720         printf("\t%ju output packets discarded due to no IPv4 route\n",
 721             (uintmax_t)stats.noroute4);
 722         printf("\t%ju output packets discarded due to no IPv6 route\n",
 723             (uintmax_t)stats.noroute6);
 724         printf("\t%ju packets discarded due to unsupported protocol\n",
 725             (uintmax_t)stats.noproto);
 726         printf("\t%ju packets discarded due to memory allocation problems\n",
 727             (uintmax_t)stats.nomem);
 728         printf("\t%ju packets discarded due to some errors\n",
 729             (uintmax_t)stats.dropped);
 730         printf("\t%ju packets not matched with IPv4 prefix\n",
 731             (uintmax_t)stats.nomatch4);
 732
 733         printf("\t%ju mbufs queued for post processing\n",
 734             (uintmax_t)stats.jreinjected);
 735         printf("\t%ju times the job queue was processed\n",
 736             (uintmax_t)stats.jcalls);
 737         printf("\t%ju job requests queued\n",
 738             (uintmax_t)stats.jrequests);
 739         printf("\t%ju job requests queue limit reached\n",
 740             (uintmax_t)stats.jmaxlen);
 741         printf("\t%ju job requests failed due to memory allocation problems\n",
 742             (uintmax_t)stats.jnomem);
 743
 744         printf("\t%ju hosts allocated\n", (uintmax_t)stats.hostcount);
 745         printf("\t%ju hosts requested\n", (uintmax_t)stats.jhostsreq);
 746         printf("\t%ju host requests failed\n", (uintmax_t)stats.jhostfails);
 747
 748         printf("\t%ju portgroups requested\n", (uintmax_t)stats.jportreq);
 749         printf("\t%ju portgroups allocated\n", (uintmax_t)stats.spgcreated);
 750         printf("\t%ju portgroups deleted\n", (uintmax_t)stats.spgdeleted);
 751         printf("\t%ju portgroup requests failed\n",
 752             (uintmax_t)stats.jportfails);
 753         printf("\t%ju portgroups allocated for TCP\n",
 754             (uintmax_t)stats.tcpchunks);
 755         printf("\t%ju portgroups allocated for UDP\n",
 756             (uintmax_t)stats.udpchunks);
 757         printf("\t%ju portgroups allocated for ICMP\n",
 758             (uintmax_t)stats.icmpchunks);
 759
 760         printf("\t%ju states created\n", (uintmax_t)stats.screated);
 761         printf("\t%ju states deleted\n", (uintmax_t)stats.sdeleted);
 762 }
 763
 764 static int
 765 nat64lsn_show_cb(ipfw_nat64lsn_cfg *cfg, const char *name, uint8_t set)
 766 {
 767         char abuf[INET6_ADDRSTRLEN];
 768
 769         if (name != NULL && strcmp(cfg->name, name) != 0)
 770                 return (ESRCH);
 771
 772         if (g_co.use_set != 0 && cfg->set != set)
 773                 return (ESRCH);
 774
 775         if (g_co.use_set != 0 || cfg->set != 0)
 776                 printf("set %u ", cfg->set);
 777         inet_ntop(AF_INET, &cfg->prefix4, abuf, sizeof(abuf));
 778         printf("nat64lsn %s prefix4 %s/%u", cfg->name, abuf, cfg->plen4);
 779         inet_ntop(AF_INET6, &cfg->prefix6, abuf, sizeof(abuf));
 780         printf(" prefix6 %s/%u", abuf, cfg->plen6);
 781         if (g_co.verbose || cfg->states_chunks > 1)
 782                 printf(" states_chunks %u", cfg->states_chunks);
 783         if (g_co.verbose || cfg->nh_delete_delay != NAT64LSN_HOST_AGE)
 784                 printf(" host_del_age %u", cfg->nh_delete_delay);
 785         if (g_co.verbose || cfg->pg_delete_delay != NAT64LSN_PG_AGE)
 786                 printf(" pg_del_age %u", cfg->pg_delete_delay);
 787         if (g_co.verbose || cfg->st_syn_ttl != NAT64LSN_TCP_SYN_AGE)
 788                 printf(" tcp_syn_age %u", cfg->st_syn_ttl);
 789         if (g_co.verbose || cfg->st_close_ttl != NAT64LSN_TCP_FIN_AGE)
 790                 printf(" tcp_close_age %u", cfg->st_close_ttl);
 791         if (g_co.verbose || cfg->st_estab_ttl != NAT64LSN_TCP_EST_AGE)
 792                 printf(" tcp_est_age %u", cfg->st_estab_ttl);
 793         if (g_co.verbose || cfg->st_udp_ttl != NAT64LSN_UDP_AGE)
 794                 printf(" udp_age %u", cfg->st_udp_ttl);
 795         if (g_co.verbose || cfg->st_icmp_ttl != NAT64LSN_ICMP_AGE)
 796                 printf(" icmp_age %u", cfg->st_icmp_ttl);
 797         if (g_co.verbose || cfg->jmaxlen != NAT64LSN_JMAXLEN)
 798                 printf(" jmaxlen %u", cfg->jmaxlen);
 799         if (cfg->flags & NAT64_LOG)
 800                 printf(" log");
 801         if (cfg->flags & NAT64_ALLOW_PRIVATE)
 802                 printf(" allow_private");
 803         printf("\n");
 804         return (0);
 805 }
 806
 807 static int
 808 nat64lsn_destroy_cb(ipfw_nat64lsn_cfg *cfg, const char *name __unused,
 809     uint8_t set)
 810 {
 811
 812         if (g_co.use_set != 0 && cfg->set != set)
 813                 return (ESRCH);
 814
 815         nat64lsn_destroy(cfg->name, cfg->set);
 816         return (0);
 817 }
 818
 819
 820 /*
 821  * Compare nat64lsn instances names.
 822  * Honor number comparison.
 823  */
 824 static int
 825 nat64name_cmp(const void *a, const void *b)
 826 {
 827         const ipfw_nat64lsn_cfg *ca, *cb;
 828
 829         ca = (const ipfw_nat64lsn_cfg *)a;
 830         cb = (const ipfw_nat64lsn_cfg *)b;
 831
 832         if (ca->set > cb->set)
 833                 return (1);
 834         else if (ca->set < cb->set)
 835                 return (-1);
 836         return (stringnum_cmp(ca->name, cb->name));
 837 }
 838
 839 /*
 840  * Retrieves nat64lsn instance list from kernel,
 841  * optionally sorts it and calls requested function for each instance.
 842  *
 843  * Request: [ ipfw_obj_lheader ]
 844  * Reply: [ ipfw_obj_lheader ipfw_nat64lsn_cfg x N ]
 845  */
 846 static int
 847 nat64lsn_foreach(nat64lsn_cb_t *f, const char *name, uint8_t set,  int sort)
 848 {
 849         ipfw_obj_lheader *olh;
 850         ipfw_nat64lsn_cfg *cfg;
 851         size_t sz;
 852         uint32_t i;
 853
 854         /* Start with reasonable default */
 855         sz = sizeof(*olh) + 16 * sizeof(ipfw_nat64lsn_cfg);
 856
 857         for (;;) {
 858                 if ((olh = calloc(1, sz)) == NULL)
 859                         return (ENOMEM);
 860
 861                 olh->size = sz;
 862                 if (do_get3(IP_FW_NAT64LSN_LIST, &olh->opheader, &sz) != 0) {
 863                         sz = olh->size;
 864                         free(olh);
 865                         if (errno != ENOMEM)
 866                                 return (errno);
 867                         continue;
 868                 }
 869
 870                 if (sort != 0)
 871                         qsort(olh + 1, olh->count, olh->objsize,
 872                             nat64name_cmp);
 873
 874                 cfg = (ipfw_nat64lsn_cfg *)(olh + 1);
 875                 for (i = 0; i < olh->count; i++) {
 876                         (void)f(cfg, name, set); /* Ignore errors for now */
 877                         cfg = (ipfw_nat64lsn_cfg *)((caddr_t)cfg +
 878                             olh->objsize);
 879                 }
 880                 free(olh);
 881                 break;
 882         }
 883         return (0);
 884 }
 885