root/usr/share/ucode/fw4.uc

   1 {%
   2
   3 let fs = require("fs");
   4 let uci = require("uci");
   5 let ubus = require("ubus");
   6
   7 let STATEFILE = "/var/run/fw4.state";
   8
   9 let PARSE_LIST   = 0x01;
  10 let FLATTEN_LIST = 0x02;
  11 let NO_INVERT    = 0x04;
  12 let UNSUPPORTED  = 0x08;
  13 let REQUIRED     = 0x10;
  14 let DEPRECATED   = 0x20;
  15
  16 let ipv4_icmptypes = {
  17         "any": [ 0xFF, 0, 0xFF ],
  18         "echo-reply": [ 0, 0, 0xFF ],
  19         "pong": [ 0, 0, 0xFF ], /* Alias */
  20
  21         "destination-unreachable": [ 3, 0, 0xFF ],
  22         "network-unreachable": [ 3, 0, 0 ],
  23         "host-unreachable": [ 3, 1, 1 ],
  24         "protocol-unreachable": [ 3, 2, 2 ],
  25         "port-unreachable": [ 3, 3, 3 ],
  26         "fragmentation-needed": [ 3, 4, 4 ],
  27         "source-route-failed": [ 3, 5, 5 ],
  28         "network-unknown": [ 3, 6, 6 ],
  29         "host-unknown": [ 3, 7, 7 ],
  30         "network-prohibited": [ 3, 9, 9 ],
  31         "host-prohibited": [ 3, 10, 10 ],
  32         "TOS-network-unreachable": [ 3, 11, 11 ],
  33         "TOS-host-unreachable": [ 3, 12, 12 ],
  34         "communication-prohibited": [ 3, 13, 13 ],
  35         "host-precedence-violation": [ 3, 14, 14 ],
  36         "precedence-cutoff": [ 3, 15, 15 ],
  37
  38         "source-quench": [ 4, 0, 0xFF ],
  39
  40         "redirect": [ 5, 0, 0xFF ],
  41         "network-redirect": [ 5, 0, 0 ],
  42         "host-redirect": [ 5, 1, 1 ],
  43         "TOS-network-redirect": [ 5, 2, 2 ],
  44         "TOS-host-redirect": [ 5, 3, 3 ],
  45
  46         "echo-request": [ 8, 0, 0xFF ],
  47         "ping": [ 8, 0, 0xFF ], /* Alias */
  48
  49         "router-advertisement": [ 9, 0, 0xFF ],
  50
  51         "router-solicitation": [ 10, 0, 0xFF ],
  52
  53         "time-exceeded": [ 11, 0, 0xFF ],
  54         "ttl-exceeded": [ 11, 0, 0xFF ], /* Alias */
  55         "ttl-zero-during-transit": [ 11, 0, 0 ],
  56         "ttl-zero-during-reassembly": [ 11, 1, 1 ],
  57
  58         "parameter-problem": [ 12, 0, 0xFF ],
  59         "ip-header-bad": [ 12, 0, 0 ],
  60         "required-option-missing": [ 12, 1, 1 ],
  61
  62         "timestamp-request": [ 13, 0, 0xFF ],
  63
  64         "timestamp-reply": [ 14, 0, 0xFF ],
  65
  66         "address-mask-request": [ 17, 0, 0xFF ],
  67
  68         "address-mask-reply": [ 18, 0, 0xFF ]
  69 };
  70
  71 let ipv6_icmptypes = {
  72         "destination-unreachable": [ 1, 0, 0xFF ],
  73         "no-route": [ 1, 0, 0 ],
  74         "communication-prohibited": [ 1, 1, 1 ],
  75         "address-unreachable": [ 1, 3, 3 ],
  76         "port-unreachable": [ 1, 4, 4 ],
  77
  78         "packet-too-big": [ 2, 0, 0xFF ],
  79
  80         "time-exceeded": [ 3, 0, 0xFF ],
  81         "ttl-exceeded": [ 3, 0, 0xFF ], /* Alias */
  82         "ttl-zero-during-transit": [ 3, 0, 0 ],
  83         "ttl-zero-during-reassembly": [ 3, 1, 1 ],
  84
  85         "parameter-problem": [ 4, 0, 0xFF ],
  86         "bad-header": [ 4, 0, 0 ],
  87         "unknown-header-type": [ 4, 1, 1 ],
  88         "unknown-option": [ 4, 2, 2 ],
  89
  90         "echo-request": [ 128, 0, 0xFF ],
  91         "ping": [ 128, 0, 0xFF ], /* Alias */
  92
  93         "echo-reply": [ 129, 0, 0xFF ],
  94         "pong": [ 129, 0, 0xFF ], /* Alias */
  95
  96         "router-solicitation": [ 133, 0, 0xFF ],
  97
  98         "router-advertisement": [ 134, 0, 0xFF ],
  99
 100         "neighbour-solicitation": [ 135, 0, 0xFF ],
 101         "neighbor-solicitation": [ 135, 0, 0xFF ], /* Alias */
 102
 103         "neighbour-advertisement": [ 136, 0, 0xFF ],
 104         "neighbor-advertisement": [ 136, 0, 0xFF ], /* Alias */
 105
 106         "redirect": [ 137, 0, 0xFF ]
 107 };
 108
 109 let dscp_classes = {
 110         "CS0": 0x00,
 111         "CS1": 0x08,
 112         "CS2": 0x10,
 113         "CS3": 0x18,
 114         "CS4": 0x20,
 115         "CS5": 0x28,
 116         "CS6": 0x30,
 117         "CS7": 0x38,
 118         "BE": 0x00,
 119         "AF11": 0x0a,
 120         "AF12": 0x0c,
 121         "AF13": 0x0e,
 122         "AF21": 0x12,
 123         "AF22": 0x14,
 124         "AF23": 0x16,
 125         "AF31": 0x1a,
 126         "AF32": 0x1c,
 127         "AF33": 0x1e,
 128         "AF41": 0x22,
 129         "AF42": 0x24,
 130         "AF43": 0x26,
 131         "EF": 0x2e
 132 };
 133
 134 function to_mask(bits, v6) {
 135         let m = [];
 136
 137         if (bits < 0 || bits > (v6 ? 128 : 32))
 138                 return null;
 139
 140         for (let i = 0; i < (v6 ? 16 : 4); i++) {
 141                 let b = (bits < 8) ? bits : 8;
 142                 m[i] = (0xff << (8 - b)) & 0xff;
 143                 bits -= b;
 144         }
 145
 146         return arrtoip(m);
 147 }
 148
 149 function to_bits(mask) {
 150         let a = iptoarr(mask);
 151
 152         if (!a)
 153                 return null;
 154
 155         let bits = 0;
 156
 157         for (let i = 0, z = false; i < length(a); i++) {
 158                 z = z || !a[i];
 159
 160                 while (!z && (a[i] & 0x80)) {
 161                         a[i] = (a[i] << 1) & 0xff;
 162                         bits++;
 163                 }
 164
 165                 if (a[i])
 166                         return null;
 167         }
 168
 169         return bits;
 170 }
 171
 172 function apply_mask(addr, mask) {
 173         let a = iptoarr(addr);
 174
 175         if (!a)
 176                 return null;
 177
 178         if (type(mask) == "int") {
 179                 for (let i = 0; i < length(a); i++) {
 180                         let b = (mask < 8) ? mask : 8;
 181                         a[i] &= (0xff << (8 - b)) & 0xff;
 182                         mask -= b;
 183                 }
 184         }
 185         else {
 186                 let m = iptoarr(mask);
 187
 188                 if (!m || length(a) != length(m))
 189                         return null;
 190
 191                 for (let i = 0; i < length(a); i++)
 192                         a[i] &= m[i];
 193         }
 194
 195         return arrtoip(a);
 196 }
 197
 198 function to_array(x) {
 199         if (type(x) == "array")
 200                 return x;
 201
 202         if (x == null)
 203                 return [];
 204
 205         if (type(x) == "object")
 206                 return [ x ];
 207
 208         x = trim("" + x);
 209
 210         return (x == "") ? [] : split(x, /[ \t]+/);
 211 }
 212
 213 function filter_pos(x) {
 214         let rv = filter(x, e => !e.invert);
 215         return length(rv) ? rv : null;
 216 }
 217
 218 function filter_neg(x) {
 219         let rv = filter(x, e => e.invert);
 220         return length(rv) ? rv : null;
 221 }
 222
 223 function null_if_empty(x) {
 224         return length(x) ? x : null;
 225 }
 226
 227 function subnets_split_af(x) {
 228         let rv = [];
 229
 230         for (let ag in to_array(x)) {
 231                 for (let a in filter(ag.addrs, a => (a.family == 4))) {
 232                         rv[0] = rv[0] || [];
 233                         push(rv[0], { ...a, invert: ag.invert });
 234                 }
 235
 236                 for (let a in filter(ag.addrs, a => (a.family == 6))) {
 237                         rv[1] = rv[1] || [];
 238                         push(rv[1], { ...a, invert: ag.invert });
 239                 }
 240         }
 241
 242         return rv;
 243 }
 244
 245 function ensure_tcpudp(x) {
 246         if (length(filter(x, p => (p.name == "tcp" || p.name == "udp"))))
 247                 return true;
 248
 249         let rest = filter(x, p => !p.any),
 250             any = filter(x, p => p.any);
 251
 252         if (length(any) && !length(rest)) {
 253                 splice(x, 0);
 254                 push(x, { name: "tcp" }, { name: "udp" });
 255                 return true;
 256         }
 257
 258         return false;
 259 }
 260
 261 let is_family = (x, v) => (!x.family || x.family == v);
 262 let family_is_ipv4 = (x) => (!x.family || x.family == 4);
 263 let family_is_ipv6 = (x) => (!x.family || x.family == 6);
 264
 265 function infer_family(f, objects) {
 266         let res = f;
 267         let by = null;
 268
 269         for (let i = 0; i < length(objects); i += 2) {
 270                 let objs = to_array(objects[i]),
 271                     desc = objects[i + 1];
 272
 273                 for (let obj in objs) {
 274                         if (!obj || !obj.family || obj.family == res)
 275                                 continue;
 276
 277                         if (res == 0) {
 278                                 res = obj.family;
 279                                 by = obj.desc;
 280                                 continue;
 281                         }
 282
 283                         return by
 284                                 ? sprintf('references IPv%d only %s but is restricted to IPv%d by %s', obj.family, desc, res, by)
 285                                 : sprintf('is restricted to IPv%d but referenced %s is IPv%d only', res, desc, obj.family);
 286                 }
 287         }
 288
 289         return res;
 290 }
 291
 292 function map_setmatch(set, match, proto) {
 293         if (!set || (('inet_service' in set.types) && proto != 'tcp' && proto != 'udp'))
 294                 return null;
 295
 296         let fields = [];
 297
 298         for (let i, t in set.types) {
 299                 let dir = (((match.dir && match.dir[i]) || set.directions[i] || 'src') == 'src' ? 's' : 'd');
 300
 301                 switch (t) {
 302                 case 'ipv4_addr':
 303                         fields[i] = sprintf('ip %saddr', dir);
 304                         break;
 305
 306                 case 'ipv6_addr':
 307                         fields[i] = sprintf('ip6 %saddr', dir);
 308                         break;
 309
 310                 case 'ether_addr':
 311                         if (dir != 's')
 312                                 return NaN;
 313
 314                         fields[i] = 'ether saddr';
 315                         break;
 316
 317                 case 'inet_service':
 318                         fields[i] = sprintf('%s %sport', proto, dir);
 319                         break;
 320                 }
 321         }
 322
 323         return fields;
 324 }
 325
 326
 327 return {
 328         read_kernel_version: function() {
 329                 let fd = fs.open("/proc/version", "r"),
 330                     v = 0;
 331
 332                 if (fd) {
 333                     let m = match(fd.read("line"), /^Linux version ([0-9]+)\.([0-9]+)\.([0-9]+)/);
 334
 335                     v = m ? (+m[1] << 24) | (+m[2] << 16) | (+m[3] << 8) : 0;
 336                     fd.close();
 337                 }
 338
 339                 return v;
 340         },
 341
 342         read_state: function() {
 343                 let fd = fs.open(STATEFILE, "r");
 344                 let state = null;
 345
 346                 if (fd) {
 347                         try {
 348                                 state = json(fd.read("all"));
 349                         }
 350                         catch (e) {
 351                                 warn(sprintf("Unable to parse '%s': %s\n", STATEFILE, e));
 352                         }
 353
 354                         fd.close();
 355                 }
 356
 357                 return state;
 358         },
 359
 360         read_ubus: function() {
 361                 let self = this,
 362                     ifaces, services,
 363                     rules = [], networks = {},
 364                     bus = ubus.connect();
 365
 366                 if (bus) {
 367                         ifaces = bus.call("network.interface", "dump");
 368                     services = bus.call("service", "get_data", { "type": "firewall" });
 369
 370                     bus.disconnect();
 371                 }
 372                 else {
 373                         warn(sprintf("Unable to connect to ubus: %s\n", ubus.error()));
 374                 }
 375
 376
 377                 //
 378                 // Gather logical network information from ubus
 379                 //
 380
 381                 if (type(ifaces) == "object" && type(ifaces.interface) == "array") {
 382                         for (let ifc in ifaces.interface) {
 383                                 let net = {
 384                                         up: ifc.up,
 385                                         device: ifc.l3_device,
 386                                         zone: ifc.data?.zone
 387                                 };
 388
 389                                 if (type(ifc["ipv4-address"]) == "array") {
 390                                         for (let addr in ifc["ipv4-address"]) {
 391                                                 net.ipaddrs = net.ipaddrs || [];
 392                                                 push(net.ipaddrs, {
 393                                                         family: 4,
 394                                                         addr: addr.address,
 395                                                         mask: to_mask(addr.mask, false),
 396                                                         bits: addr.mask
 397                                                 });
 398                                         }
 399                                 }
 400
 401                                 if (type(ifc["ipv6-address"]) == "array") {
 402                                         for (let addr in ifc["ipv6-address"]) {
 403                                                 net.ipaddrs = net.ipaddrs || [];
 404                                                 push(net.ipaddrs, {
 405                                                         family: 6,
 406                                                         addr: addr.address,
 407                                                         mask: to_mask(addr.mask, true),
 408                                                         bits: addr.mask
 409                                                 });
 410                                         }
 411                                 }
 412
 413                                 if (type(ifc["ipv6-prefix-assignment"]) == "array") {
 414                                         for (let addr in ifc["ipv6-prefix-assignment"]) {
 415                                                 if (addr["local-address"]) {
 416                                                         net.ipaddrs = net.ipaddrs || [];
 417                                                         push(net.ipaddrs, {
 418                                                                 family: 6,
 419                                                                 addr: addr["local-address"].address,
 420                                                                 mask: to_mask(addr["local-address"].mask, true),
 421                                                                 bits: addr["local-address"].mask
 422                                                         });
 423                                                 }
 424                                         }
 425                                 }
 426
 427                                 if (type(ifc.data) == "object" && type(ifc.data.firewall) == "array") {
 428                                         let n = 0;
 429
 430                                         for (let rulespec in ifc.data.firewall) {
 431                                                 push(rules, {
 432                                                         ...rulespec,
 433
 434                                                         name: (rulespec.type != 'ipset') ? sprintf('ubus:%s[%s] %s %d', ifc.interface, ifc.proto, rulespec.type || 'rule', n) : rulespec.name,
 435                                                         device: rulespec.device || ifc.l3_device
 436                                                 });
 437
 438                                                 n++;
 439                                         }
 440                                 }
 441
 442                                 networks[ifc.interface] = net;
 443                         }
 444                 }
 445
 446
 447                 //
 448                 // Gather firewall rule definitions from ubus services
 449                 //
 450
 451                 if (type(services) == "object") {
 452                         for (let svcname, service in services) {
 453                                 if (type(service) == "object" && type(service.firewall) == "array") {
 454                                         let n = 0;
 455
 456                                         for (let rulespec in services[svcname].firewall) {
 457                                                 push(rules, {
 458                                                         ...rulespec,
 459
 460                                                         name: (rulespec.type != 'ipset') ? sprintf('ubus:%s %s %d', svcname, rulespec.type || 'rule', n) : rulespec.name
 461                                                 });
 462
 463                                                 n++;
 464                                         }
 465                                 }
 466
 467                                 for (let svcinst, instance in service) {
 468                                         if (type(instance) == "object" && type(instance.firewall) == "array") {
 469                                                 let n = 0;
 470
 471                                                 for (let rulespec in instance.firewall) {
 472                                                         push(rules, {
 473                                                                 ...rulespec,
 474
 475                                                                 name: (rulespec.type != 'ipset') ? sprintf('ubus:%s[%s] %s %d', svcname, svcinst, rulespec.type || 'rule', n) : rulespec.name
 476                                                         });
 477
 478                                                         n++;
 479                                                 }
 480                                         }
 481                                 }
 482                         }
 483                 }
 484
 485                 return {
 486                         networks: networks,
 487                         ubus_rules: rules
 488                 };
 489         },
 490
 491         load: function(use_statefile) {
 492                 let self = this;
 493
 494                 this.state = use_statefile ? this.read_state() : null;
 495
 496                 this.cursor = uci.cursor();
 497                 this.cursor.load("firewall");
 498                 this.cursor.load("/usr/share/firewall4/helpers");
 499
 500                 if (!this.state)
 501                         this.state = this.read_ubus();
 502
 503                 this.kernel = this.read_kernel_version();
 504
 505
 506                 //
 507                 // Read helper mapping
 508                 //
 509
 510                 this.cursor.foreach("helpers", "helper", h => self.parse_helper(h));
 511
 512
 513                 //
 514                 // Read default policies
 515                 //
 516
 517                 this.cursor.foreach("firewall", "defaults", d => self.parse_defaults(d));
 518
 519                 if (!this.state.defaults)
 520                         this.parse_defaults({});
 521
 522
 523                 //
 524                 // Build list of ipsets
 525                 //
 526
 527                 if (!this.state.ipsets) {
 528                         map(filter(this.state.ubus_rules, n => (n.type == "ipset")), s => self.parse_ipset(s));
 529                         this.cursor.foreach("firewall", "ipset", s => self.parse_ipset(s));
 530                 }
 531
 532
 533                 //
 534                 // Build list of logical zones
 535                 //
 536
 537                 if (!this.state.zones)
 538                         this.cursor.foreach("firewall", "zone", z => self.parse_zone(z));
 539
 540
 541                 //
 542                 // Build list of forwardings
 543                 //
 544
 545                 this.cursor.foreach("firewall", "forwarding", f => self.parse_forwarding(f));
 546
 547
 548                 //
 549                 // Build list of rules
 550                 //
 551
 552                 map(filter(this.state.ubus_rules, r => (r.type == "rule")), r => self.parse_rule(r));
 553                 this.cursor.foreach("firewall", "rule", r => self.parse_rule(r));
 554
 555
 556                 //
 557                 // Build list of redirects
 558                 //
 559
 560                 map(filter(this.state.ubus_rules, r => (r.type == "redirect")), r => self.parse_redirect(r));
 561                 this.cursor.foreach("firewall", "redirect", r => self.parse_redirect(r));
 562
 563
 564                 //
 565                 // Build list of snats
 566                 //
 567
 568                 map(filter(this.state.ubus_rules, n => (n.type == "nat")), n => self.parse_nat(n));
 569                 this.cursor.foreach("firewall", "nat", n => self.parse_nat(n));
 570
 571
 572                 if (use_statefile) {
 573                         let fd = fs.open(STATEFILE, "w");
 574
 575                         if (fd) {
 576                                 fd.write({
 577                                         zones: this.state.zones,
 578                                         ipsets: this.state.ipsets,
 579                                         networks: this.state.networks,
 580                                         ubus_rules: this.state.ubus_rules
 581                                 });
 582
 583                                 fd.close();
 584                         }
 585                         else {
 586                                 warn("Unable to write '%s': %s\n", STATEFILE, fs.error());
 587                         }
 588                 }
 589         },
 590
 591         warn: function(fmt, ...args) {
 592                 if (getenv("QUIET"))
 593                         return;
 594
 595                 let msg = sprintf(fmt, ...args);
 596
 597                 if (getenv("TTY"))
 598                         warn("\033[33m", msg, "\033[m\n");
 599                 else
 600                         warn("[!] ", msg, "\n");
 601         },
 602
 603         get: function(sid, opt) {
 604                 return this.cursor.get("firewall", sid, opt);
 605         },
 606
 607         get_all: function(sid) {
 608                 return this.cursor.get_all("firewall", sid);
 609         },
 610
 611         parse_options: function(s, spec) {
 612                 let rv = {};
 613
 614                 for (let key, val in spec) {
 615                         let datatype = "parse_" + val[0],
 616                             defval = val[1],
 617                             flags = val[2] || 0,
 618                             parsefn = (flags & PARSE_LIST) ? "parse_list" : "parse_opt";
 619
 620                         let res = this[parsefn](s, key, datatype, defval, flags);
 621
 622                         if (res !== res)
 623                                 return false;
 624
 625                         if (type(res) == "object" && res.invert && (flags & NO_INVERT)) {
 626                                 this.warn_section(s, "option '" + key + '" must not be negated');
 627                                 return false;
 628                         }
 629
 630                         if (res != null) {
 631                                 if (flags & DEPRECATED)
 632                                         this.warn_section(s, "option '" + key + "' is deprecated by fw4");
 633                                 else if (flags & UNSUPPORTED)
 634                                         this.warn_section(s, "option '" + key + "' is not supported by fw4");
 635                                 else
 636                                         rv[key] = res;
 637                         }
 638                 }
 639
 640                 for (let opt in s) {
 641                         if (index(opt, '.') != 0 && opt != 'type' && !exists(spec, opt)) {
 642                                 this.warn_section(s, "specifies unknown option '" + opt + "'");
 643                         }
 644                 }
 645
 646                 return rv;
 647         },
 648
 649         parse_subnet: function(subnet) {
 650                 let parts = split(subnet, "/");
 651                 let a, b, m, n;
 652
 653                 switch (length(parts)) {
 654                 case 2:
 655                         a = iptoarr(parts[0]);
 656                         m = iptoarr(parts[1]);
 657
 658                         if (!a)
 659                                 return null;
 660
 661                         if (m) {
 662                                 if (length(a) != length(m))
 663                                         return null;
 664
 665                                 b = to_bits(parts[1]);
 666
 667                                 if (b == null)
 668                                         return null;
 669
 670                                 m = arrtoip(m);
 671                         }
 672                         else {
 673                                 b = +parts[1];
 674
 675                                 if (type(b) != "int")
 676                                         return null;
 677
 678                                 m = to_mask(b, length(a) == 16);
 679                         }
 680
 681                         return [{
 682                                 family: (length(a) == 16) ? 6 : 4,
 683                                 addr: arrtoip(a),
 684                                 mask: m,
 685                                 bits: b
 686                         }];
 687
 688                 case 1:
 689                         parts = split(parts[0], "-");
 690
 691                         switch (length(parts)) {
 692                         case 2:
 693                                 a = iptoarr(parts[0]);
 694                                 b = iptoarr(parts[1]);
 695
 696                                 if (a && b && length(a) == length(b)) {
 697                                         return [{
 698                                                 family: (length(a) == 16) ? 6 : 4,
 699                                                 addr: arrtoip(a),
 700                                                 addr2: arrtoip(b),
 701                                                 range: true
 702                                         }];
 703                                 }
 704
 705                                 break;
 706
 707                         case 1:
 708                                 a = iptoarr(parts[0]);
 709
 710                                 if (a) {
 711                                         return [{
 712                                                 family: (length(a) == 16) ? 6 : 4,
 713                                                 addr: arrtoip(a),
 714                                                 mask: to_mask(length(a) * 8, length(a) == 16),
 715                                                 bits: length(a) * 8
 716                                         }];
 717                                 }
 718
 719                                 n = this.state.networks[parts[0]];
 720
 721                                 if (n)
 722                                         return [ ...(n.ipaddrs || []) ];
 723                         }
 724                 }
 725
 726                 return null;
 727         },
 728
 729         parse_enum: function(val, choices) {
 730                 if (type(val) == "string") {
 731                         val = lc(val);
 732
 733                         for (let i = 0; i < length(choices); i++)
 734                                 if (substr(choices[i], 0, length(val)) == val)
 735                                         return choices[i];
 736                 }
 737
 738                 return null;
 739         },
 740
 741         section_id: function(sid) {
 742                 let s = this.get_all(sid);
 743
 744                 if (!s)
 745                         return null;
 746
 747                 if (s[".anonymous"]) {
 748                         let c = 0;
 749
 750                         this.cursor.foreach("firewall", s[".type"], function(ss) {
 751                                 if (ss[".name"] == s[".name"])
 752                                         return false;
 753
 754                                 c++;
 755                         });
 756
 757                         return sprintf("@%s[%d]", s[".type"], c);
 758                 }
 759
 760                 return s[".name"];
 761         },
 762
 763         warn_section: function(s, msg) {
 764                 if (s[".name"]) {
 765                         if (s.name)
 766                                 this.warn("Section %s (%s) %s", this.section_id(s[".name"]), s.name, msg);
 767                         else
 768                                 this.warn("Section %s %s", this.section_id(s[".name"]), msg);
 769                 }
 770                 else {
 771                         if (s.name)
 772                                 this.warn("ubus %s (%s) %s", s.type || "rule", s.name, msg);
 773                         else
 774                                 this.warn("ubus %s %s", s.type || "rule", msg);
 775                 }
 776         },
 777
 778         parse_policy: function(val) {
 779                 return this.parse_enum(val, [
 780                         "accept",
 781                         "reject",
 782                         "drop"
 783                 ]);
 784         },
 785
 786         parse_bool: function(val) {
 787                 if (val == "1" || val == "on" || val == "true" || val == "yes")
 788                         return true;
 789                 else if (val == "0" || val == "off" || val == "false" || val == "no")
 790                         return false;
 791                 else
 792                         return null;
 793         },
 794
 795         parse_family: function(val) {
 796                 if (val == 'any' || val == 'all' || val == '*')
 797                         return 0;
 798                 else if (val == 'inet' || index(val, '4') > -1)
 799                         return 4;
 800                 else if (index(val, '6') > -1)
 801                         return 6;
 802
 803                 return null;
 804         },
 805
 806         parse_zone_ref: function(val) {
 807                 if (val == null)
 808                         return null;
 809
 810                 if (val == '*')
 811                         return { any: true };
 812
 813                 for (let zone in this.state.zones) {
 814                         if (zone.name == val) {
 815                                 return {
 816                                         any: false,
 817                                         zone: zone
 818                                 };
 819                         }
 820                 }
 821
 822                 return null;
 823         },
 824
 825         parse_device: function(val) {
 826                 let rv = this.parse_invert(val);
 827
 828                 if (!rv)
 829                         return null;
 830
 831                 if (rv.val == '*')
 832                         rv.any = true;
 833                 else
 834                         rv.device = rv.val;
 835
 836                 return rv;
 837         },
 838
 839         parse_direction: function(val) {
 840                 if (val == 'in' || val == 'ingress')
 841                         return true;
 842                 else if (val == 'out' || val == 'egress')
 843                         return false;
 844
 845                 return null;
 846         },
 847
 848         parse_setmatch: function(val) {
 849                 let rv = this.parse_invert(val);
 850
 851                 if (!rv)
 852                         return null;
 853
 854                 rv.val = trim(replace(rv.val, /^[^ \t]+/, function(m) {
 855                         rv.name = m;
 856                         return '';
 857                 }));
 858
 859                 let dir = split(rv.val, /[ \t,]/);
 860
 861                 for (let i = 0; i < 3 && i < length(dir); i++) {
 862                         if (dir[i] == "dst" || dir[i] == "dest") {
 863                                 rv.dir = rv.dir || [];
 864                                 rv.dir[i] = "dst";
 865                         }
 866                         else if (dir[i] == "src") {
 867                                 rv.dir = rv.dir || [];
 868                                 rv.dir[i] = "src";
 869                         }
 870                 }
 871
 872                 return length(rv.name) ? rv : null;
 873         },
 874
 875         parse_cthelper: function(val) {
 876                 let rv = this.parse_invert(val);
 877
 878                 if (!rv)
 879                         return null;
 880
 881                 let helper = filter(this.state.helpers, h => (h.name == rv.val))[0];
 882
 883                 return helper ? { ...rv, ...helper } : null;
 884         },
 885
 886         parse_protocol: function(val) {
 887                 let p = this.parse_invert(val);
 888
 889                 if (!p)
 890                         return null;
 891
 892                 p.val = lc(p.val);
 893
 894                 switch (p.val) {
 895                 case 'all':
 896                 case 'any':
 897                 case '*':
 898                         p.any = true;
 899                         break;
 900
 901                 case '1':
 902                 case 'icmp':
 903                         p.name = 'icmp';
 904                         break;
 905
 906                 case '58':
 907                 case 'icmpv6':
 908                 case 'ipv6-icmp':
 909                         p.name = 'ipv6-icmp';
 910                         break;
 911
 912                 case 'tcpudp':
 913                         return [
 914                                 { invert: p.invert, name: 'tcp' },
 915                                 { invert: p.invert, name: 'udp' }
 916                         ];
 917
 918                 case '6':
 919                         p.name = 'tcp';
 920                         break;
 921
 922                 case '17':
 923                         p.name = 'udp';
 924                         break;
 925
 926                 default:
 927                         p.name = p.val;
 928                 }
 929
 930                 return (p.any || length(p.name)) ? p : null;
 931         },
 932
 933         parse_mac: function(val) {
 934                 let mac = this.parse_invert(val);
 935                 let m = mac ? match(mac.val, /^([0-9a-f]{1,2})[:-]([0-9a-f]{1,2})[:-]([0-9a-f]{1,2})[:-]([0-9a-f]{1,2})[:-]([0-9a-f]{1,2})[:-]([0-9a-f]{1,2})$/i) : null;
 936
 937                 if (!m)
 938                         return null;
 939
 940                 mac.mac = sprintf('%02x:%02x:%02x:%02x:%02x:%02x',
 941                                   hex(m[1]), hex(m[2]), hex(m[3]),
 942                                   hex(m[4]), hex(m[5]), hex(m[6]));
 943
 944                 return mac;
 945         },
 946
 947         parse_port: function(val) {
 948                 let port = this.parse_invert(val);
 949                 let m = port ? match(port.val, /^([0-9]{1,5})([-:]([0-9]{1,5}))?$/i) : null;
 950
 951                 if (!m)
 952                         return null;
 953
 954                 if (m[3]) {
 955                         let min_port = +m[1];
 956                         let max_port = +m[3];
 957
 958                         if (min_port > max_port ||
 959                             min_port < 0 || max_port < 0 ||
 960                             min_port > 65535 || max_port > 65535)
 961                                 return null;
 962
 963                         port.min = min_port;
 964                         port.max = max_port;
 965                 }
 966                 else {
 967                         let pn = +m[1];
 968
 969                         if (pn != pn || pn < 0 || pn > 65535)
 970                                 return null;
 971
 972                         port.min = pn;
 973                         port.max = pn;
 974                 }
 975
 976                 return port;
 977         },
 978
 979         parse_network: function(val) {
 980                 let rv = this.parse_invert(val);
 981
 982                 if (!rv)
 983                         return null;
 984
 985                 let nets = this.parse_subnet(rv.val);
 986
 987                 if (nets === null)
 988                         return null;
 989
 990                 if (length(nets))
 991                         rv.addrs = [ ...nets ];
 992
 993                 return rv;
 994         },
 995
 996         parse_icmptype: function(val) {
 997                 let rv = {};
 998
 999                 if (exists(ipv4_icmptypes, val)) {
1000                         rv.family = 4;
1001
1002                         rv.type = ipv4_icmptypes[val][0];
1003                         rv.code_min = ipv4_icmptypes[val][1];
1004                         rv.code_max = ipv4_icmptypes[val][2];
1005                 }
1006
1007                 if (exists(ipv6_icmptypes, val)) {
1008                         rv.family = rv.family ? 0 : 6;
1009
1010                         rv.type6 = ipv6_icmptypes[val][0];
1011                         rv.code6_min = ipv6_icmptypes[val][1];
1012                         rv.code6_max = ipv6_icmptypes[val][2];
1013                 }
1014
1015                 if (!exists(rv, "family")) {
1016                         let m = match(val, /^([0-9]+)(\/([0-9]+))?$/);
1017
1018                         if (!m)
1019                                 return null;
1020
1021                         if (m[3]) {
1022                                 rv.type = +m[1];
1023                                 rv.code_min = +m[3];
1024                                 rv.code_max = rv.code_min;
1025                         }
1026                         else {
1027                                 rv.type = +m[1];
1028                                 rv.code_min = 0;
1029                                 rv.code_max = 0xFF;
1030                         }
1031
1032                         if (rv.type > 0xFF || rv.code_min > 0xFF || rv.code_max > 0xFF)
1033                                 return null;
1034
1035                         rv.family = 0;
1036
1037                         rv.type6 = rv.type;
1038                         rv.code6_min = rv.code_min;
1039                         rv.code6_max = rv.code_max;
1040                 }
1041
1042                 return rv;
1043         },
1044
1045         parse_invert: function(val) {
1046                 if (val == null)
1047                         return null;
1048
1049                 let rv = { invert: false };
1050
1051                 rv.val = trim(replace(val, /^[ \t]*!/, () => (rv.invert = true, '')));
1052
1053                 return length(rv.val) ? rv : null;
1054         },
1055
1056         parse_limit: function(val) {
1057                 let rv = this.parse_invert(val);
1058                 let m = rv ? match(rv.val, /^([0-9]+)(\/([a-z]+))?$/) : null;
1059
1060                 if (!m)
1061                         return null;
1062
1063                 let n = +m[1];
1064                 let u = m[3] ? this.parse_enum(m[3], [ "second", "minute", "hour", "day" ]) : "second";
1065
1066                 if (!u)
1067                         return null;
1068
1069                 rv.rate = n;
1070                 rv.unit = u;
1071
1072                 return rv;
1073         },
1074
1075         parse_int: function(val) {
1076                 let n = +val;
1077
1078                 return (n == n) ? n : null;
1079         },
1080
1081         parse_date: function(val) {
1082                 let m = match(val, /^([0-9-]+)T([0-9:]+)$/);
1083                 let d = m ? match(m[1], /^([0-9]{1,4})(-([0-9]{1,2})(-([0-9]{1,2}))?)?$/) : null;
1084                 let t = this.parse_time(m[2]);
1085
1086                 d[3] = d[3] || 1;
1087                 d[5] = d[5] || 1;
1088
1089                 if (d == null || d[1] < 1970 || d[1] > 2038 || d[3] < 1 || d[3] > 12 || d[5] < 1 || d[5] > 31)
1090                         return null;
1091
1092                 if (m[2] && !t)
1093                         return null;
1094
1095                 return {
1096                         year:  +d[1],
1097                         month: +d[3],
1098                         day:   +d[5],
1099                         hour:  t ? +t[1] : 0,
1100                         min:   t ? +t[3] : 0,
1101                         sec:   t ? +t[5] : 0
1102                 };
1103         },
1104
1105         parse_time: function(val) {
1106                 let t = match(val, /^([0-9]{1,2})(:([0-9]{1,2})(:([0-9]{1,2}))?)?$/);
1107
1108                 if (t == null || t[1] > 23 || t[3] > 59 || t[5] > 59)
1109                         return null;
1110
1111                 return {
1112                         hour: +t[1],
1113                         min:  +t[3],
1114                         sec:  +t[5]
1115                 };
1116         },
1117
1118         parse_weekdays: function(val) {
1119                 let rv = this.parse_invert(val);
1120
1121                 if (!rv)
1122                         return null;
1123
1124                 for (let day in to_array(rv.val)) {
1125                         day = this.parse_enum(day, [
1126                                 "monday",
1127                                 "tuesday",
1128                                 "wednesday",
1129                                 "thursday",
1130                                 "friday",
1131                                 "saturday",
1132                                 "sunday"
1133                         ]);
1134
1135                         if (!day)
1136                                 return null;
1137
1138                         rv.days = rv.days || {};
1139                         rv.days[day] = true;
1140                 }
1141
1142                 rv.days = keys(rv.days);
1143
1144                 return rv.days ? rv : null;
1145         },
1146
1147         parse_monthdays: function(val) {
1148                 let rv = this.parse_invert(val);
1149
1150                 if (!rv)
1151                         return null;
1152
1153                 for (let day in to_array(rv.val)) {
1154                         day = +day;
1155
1156                         if (day < 1 || day > 31)
1157                                 return null;
1158
1159                         rv.days = rv.days || [];
1160                         rv.days[day] = true;
1161                 }
1162
1163                 return rv.days ? rv : null;
1164         },
1165
1166         parse_mark: function(val) {
1167                 let rv = this.parse_invert(val);
1168                 let m = rv ? match(rv.val, /^(0?x?[0-9a-f]+)(\/(0?x?[0-9a-f]+))?$/i) : null;
1169
1170                 if (!m)
1171                         return null;
1172
1173                 let n = +m[1];
1174
1175                 if (n != n || n > 0xFFFFFFFF)
1176                         return null;
1177
1178                 rv.mark = n;
1179                 rv.mask = 0xFFFFFFFF;
1180
1181                 if (m[3]) {
1182                         n = +m[3];
1183
1184                         if (n != n || n > 0xFFFFFFFF)
1185                                 return null;
1186
1187                         rv.mask = n;
1188                 }
1189
1190                 return rv;
1191         },
1192
1193         parse_dscp: function(val) {
1194                 let rv = this.parse_invert(val);
1195
1196                 if (!rv)
1197                         return null;
1198
1199                 rv.val = uc(rv.val);
1200
1201                 if (exists(dscp_classes, rv.val)) {
1202                         rv.dscp = dscp_classes[rv.val];
1203                 }
1204                 else {
1205                         let n = +rv.val;
1206
1207                         if (n != n || n < 0 || n > 0x3F)
1208                                 return null;
1209
1210                         rv.dscp = n;
1211                 }
1212
1213                 return rv;
1214         },
1215
1216         parse_target: function(val) {
1217                 return this.parse_enum(val, [
1218                         "accept",
1219                         "reject",
1220                         "drop",
1221                         "notrack",
1222                         "helper",
1223                         "mark",
1224                         "dscp",
1225                         "dnat",
1226                         "snat",
1227                         "masquerade",
1228                         "accept",
1229                         "reject",
1230                         "drop"
1231                 ]);
1232         },
1233
1234         parse_reject_code: function(val) {
1235                 return this.parse_enum(val, [
1236                         "tcp-reset",
1237                         "port-unreachable",
1238                         "admin-prohibited",
1239                         "host-unreachable",
1240                         "no-route"
1241                 ]);
1242         },
1243
1244         parse_reflection_source: function(val) {
1245                 return this.parse_enum(val, [
1246                         "internal",
1247                         "external"
1248                 ]);
1249         },
1250
1251         parse_ipsettype: function(val) {
1252                 let m = match(val, /^(src|dst|dest)_(.+)$/);
1253                 let t = this.parse_enum(m ? m[2] : val, [
1254                         "ip",
1255                         "port",
1256                         "mac",
1257                         "net",
1258                         "set"
1259                 ]);
1260
1261                 return t ? [ (!m || m[1] == 'src') ? 'src' : 'dst', t ] : null;
1262         },
1263
1264         parse_ipsetentry: function(val, set) {
1265                 let values = split(val, /[ \t]+/);
1266
1267                 if (length(values) != length(set.types))
1268                         return null;
1269
1270                 let rv = [];
1271                 let ip, mac, port;
1272
1273                 for (let i, t in set.types) {
1274                         switch (t) {
1275                         case 'ipv4_addr':
1276                                 ip = filter(this.parse_subnet(values[i]), a => (a.family == 4));
1277
1278                                 switch (length(ip)) {
1279                                 case 0: return null;
1280                                 case 1: break;
1281                                 default: this.warn("Set entry '%s' resolves to multiple addresses, using first one", values[i]);
1282                                 }
1283
1284                                 rv[i] = ("net" in set.fw4types) ? ip[0].addr + "/" + ip[0].bits : ip[0].addr;
1285                                 break;
1286
1287                         case 'ipv6_addr':
1288                                 ip = filter(this.parse_subnet(values[i]), a => (a.family == 6));
1289
1290                                 switch(length(ip)) {
1291                                 case 0: return null;
1292                                 case 1: break;
1293                                 case 2: this.warn("Set entry '%s' resolves to multiple addresses, using first one", values[i]);
1294                                 }
1295
1296                                 rv[i] = ("net" in set.fw4types) ? ip[0].addr + "/" + ip[0].bits : ip[0].addr;
1297
1298                                 break;
1299
1300                         case 'ether_addr':
1301                                 mac = this.parse_mac(values[i]);
1302
1303                                 if (!mac || mac.invert)
1304                                         return null;
1305
1306                                 rv[i] = mac.mac;
1307                                 break;
1308
1309                         case 'inet_service':
1310                                 port = this.parse_port(values[i]);
1311
1312                                 if (!port || port.invert || port.min != port.max)
1313                                         return null;
1314
1315                                 rv[i] = port.min;
1316                                 break;
1317
1318                         default:
1319                                 rv[i] = values[i];
1320                         }
1321                 }
1322
1323                 return length(rv) ? rv : null;
1324         },
1325
1326         parse_string: function(val) {
1327                 return "" + val;
1328         },
1329
1330         parse_opt: function(s, opt, fn, defval, flags) {
1331                 let val = s[opt];
1332
1333                 if (val === null) {
1334                         if (flags & REQUIRED) {
1335                                 this.warn_section(s, "option '" + opt + "' is mandatory but not set");
1336                                 return NaN;
1337                         }
1338
1339                         val = defval;
1340                 }
1341
1342                 if (type(val) == "array") {
1343                         this.warn_section(s, "option '" + opt + "' must not be a list");
1344                         return NaN;
1345                 }
1346                 else if (val == null) {
1347                         return null;
1348                 }
1349
1350                 let res = this[fn](val);
1351
1352                 if (res === null) {
1353                         this.warn_section(s, "option '" + opt + "' specifies invalid value '" + val + "'");
1354                         return NaN;
1355                 }
1356
1357                 return res;
1358         },
1359
1360         parse_list: function(s, opt, fn, defval, flags) {
1361                 let val = s[opt];
1362                 let rv = [];
1363
1364                 if (val == null) {
1365                         if (flags & REQUIRED) {
1366                                 this.warn_section(s, "option '" + opt + "' is mandatory but not set");
1367                                 return NaN;
1368                         }
1369
1370                         val = defval;
1371                 }
1372
1373                 for (val in to_array(val)) {
1374                         let res = this[fn](val);
1375
1376                         if (res === null) {
1377                                 this.warn_section(s, "option '" + opt + "' specifies invalid value '" + val + "'");
1378                                 return NaN;
1379                         }
1380
1381                         if (flags & FLATTEN_LIST)
1382                                 push(rv, ...to_array(res));
1383                         else
1384                                 push(rv, res);
1385                 }
1386
1387                 return length(rv) ? rv : null;
1388         },
1389
1390         quote: function(s, force) {
1391                 if (force === true || !match(s, /^([0-9A-Fa-f:.\/-]+)( \. [0-9A-Fa-f:.\/-]+)*$/))
1392                         return sprintf('"%s"', replace(s + "", /(["\\])/g, '\\$1'));
1393
1394                 return s;
1395         },
1396
1397         cidr: function(a) {
1398                 if (a.range)
1399                         return sprintf("%s-%s", a.addr, a.addr2);
1400
1401                 if ((a.family == 4 && a.bits == 32) ||
1402                     (a.family == 6 && a.bits == 128))
1403                     return a.addr;
1404
1405                 return sprintf("%s/%d", apply_mask(a.addr, a.bits), a.bits);
1406         },
1407
1408         host: function(a) {
1409                 return a.range
1410                         ? sprintf("%s-%s", a.addr, a.addr2)
1411                         : apply_mask(a.addr, a.bits);
1412         },
1413
1414         port: function(p) {
1415                 if (p.min == p.max)
1416                         return sprintf('%d', p.min);
1417
1418                 return sprintf('%d-%d', p.min, p.max);
1419         },
1420
1421         set: function(v, force) {
1422                 let seen = {};
1423
1424                 v = filter(to_array(v), item => !seen[item]++);
1425
1426                 if (force || length(v) != 1)
1427                         return sprintf('{ %s }', join(', ', map(v, this.quote)));
1428
1429                 return this.quote(v[0]);
1430         },
1431
1432         concat: function(v) {
1433                 return join(' . ', to_array(v));
1434         },
1435
1436         ipproto: function(family) {
1437                 switch (family) {
1438                 case 4:
1439                         return "ip";
1440
1441                 case 6:
1442                         return "ip6";
1443                 }
1444         },
1445
1446         nfproto: function(family, human_readable) {
1447                 switch (family) {
1448                 case 4:
1449                         return human_readable ? "IPv4" : "ipv4";
1450
1451                 case 6:
1452                         return human_readable ? "IPv6" : "ipv6";
1453
1454                 default:
1455                         return human_readable ? "IPv4/IPv6" : null;
1456                 }
1457         },
1458
1459         datetime: function(stamp) {
1460                 return sprintf('"%04d-%02d-%02d %02d:%02d:%02d"',
1461                                stamp.year, stamp.month, stamp.day,
1462                                stamp.hour, stamp.min, stamp.sec);
1463         },
1464
1465         date: function(stamp) {
1466                 return sprintf('"%04d-%02d-%02d"', stamp.year, stamp.month, stamp.day);
1467         },
1468
1469         time: function(stamp) {
1470                 return sprintf('"%02d:%02d:%02d"', stamp.hour, stamp.min, stamp.sec);
1471         },
1472
1473         hex: function(n) {
1474                 return sprintf('0x%x', n);
1475         },
1476
1477         is_loopback_dev: function(dev) {
1478                 let fd = fs.open(sprintf("/sys/class/net/%s/flags", dev), "r");
1479
1480                 if (!fd)
1481                         return false;
1482
1483                 let flags = +fd.read("line");
1484
1485                 fd.close();
1486
1487                 return !!(flags & 0x8);
1488         },
1489
1490         is_loopback_addr: function(addr) {
1491                 return (index(addr, "127.") == 0 || addr == "::1" || addr == "::1/128");
1492         },
1493
1494         filter_loopback_devs: function(devs, invert) {
1495                 return null_if_empty(filter(devs, d => (this.is_loopback_dev(d) == invert)));
1496         },
1497
1498         filter_loopback_addrs: function(addrs, invert) {
1499                 return null_if_empty(filter(addrs, a => (this.is_loopback_addr(a) == invert)));
1500         },
1501
1502
1503         input_policy: function(reject_as_drop) {
1504                 return (!reject_as_drop || this.state.defaults.input != 'reject') ? this.state.defaults.input : 'drop';
1505         },
1506
1507         output_policy: function(reject_as_drop) {
1508                 return (!reject_as_drop || this.state.defaults.output != 'reject') ? this.state.defaults.output : 'drop';
1509         },
1510
1511         forward_policy: function(reject_as_drop) {
1512                 return (!reject_as_drop || this.state.defaults.forward != 'reject') ? this.state.defaults.forward : 'drop';
1513         },
1514
1515         default_option: function(flag) {
1516                 return this.state.defaults[flag];
1517         },
1518
1519         helpers: function() {
1520                 return this.state.helpers;
1521         },
1522
1523         zones: function() {
1524                 return this.state.zones;
1525         },
1526
1527         rules: function(chain) {
1528                 return filter(this.state.rules, r => (r.chain == chain));
1529         },
1530
1531         redirects: function(chain) {
1532                 return filter(this.state.redirects, r => (r.chain == chain));
1533         },
1534
1535         ipsets: function() {
1536                 return this.state.ipsets;
1537         },
1538
1539         parse_setfile: function(set, cb) {
1540                 let fd = fs.open(set.loadfile, "r");
1541
1542                 if (!fd) {
1543                         warn(sprintf("Unable to load file '%s' for set '%s': %s\n",
1544                                      set.loadfile, set.name, fs.error()));
1545                         return;
1546                 }
1547
1548                 let line = null, count = 0;
1549
1550                 while ((line = fd.read("line")) !== "") {
1551                         line = trim(line);
1552
1553                         if (length(line) == 0 || ord(line) == 35)
1554                                 continue;
1555
1556                         let v = this.parse_ipsetentry(line, set);
1557
1558                         if (!v) {
1559                                 this.warn("Skipping invalid entry '%s' in file '%s' for set '%s'",
1560                                           line, set.loadfile, set.name);
1561                                 continue;
1562                         }
1563
1564                         cb(v);
1565
1566                         count++;
1567                 }
1568
1569                 fd.close();
1570
1571                 return count;
1572         },
1573
1574         print_setentries: function(set) {
1575                 let first = true;
1576                 let printer = (entry) => {
1577                         if (first) {
1578                                 print("\t\telements = {\n");
1579                                 first = false;
1580                         }
1581
1582                         print("\t\t\t", join(" . ", entry), ",\n");
1583                 };
1584
1585                 map(set.entries, printer);
1586
1587                 if (set.loadfile)
1588                         this.parse_setfile(set, printer);
1589
1590                 if (!first)
1591                         print("\t\t}\n");
1592         },
1593
1594         parse_helper: function(data) {
1595                 let helper = this.parse_options(data, {
1596                         name: [ "string", null, REQUIRED ],
1597                         description: [ "string" ],
1598                         module: [ "string" ],
1599                         family: [ "family" ],
1600                         proto: [ "protocol", null, PARSE_LIST | FLATTEN_LIST | NO_INVERT ],
1601                         port: [ "port", null, NO_INVERT ]
1602                 });
1603
1604                 if (helper === false) {
1605                         this.warn("Helper definition '%s' skipped due to invalid options", data.name || data['.name']);
1606                         return;
1607                 }
1608                 else if (helper.proto.any) {
1609                         this.warn("Helper definition '%s' must not specify wildcard protocol", data.name || data['.name']);
1610                         return;
1611                 }
1612                 else if (length(helper.proto) > 1) {
1613                         this.warn("Helper definition '%s' must not specify multiple protocols", data.name || data['.name']);
1614                         return;
1615                 }
1616
1617                 helper.available = ((fs.stat("/sys/module/" + helper.module) || {}).type == "directory");
1618
1619                 this.state.helpers = this.state.helpers || [];
1620                 push(this.state.helpers, helper);
1621         },
1622
1623         parse_defaults: function(data) {
1624                 if (this.state.defaults) {
1625                         this.warn_section(data, ": ignoring duplicate defaults section");
1626                         return;
1627                 }
1628
1629                 let defs = this.parse_options(data, {
1630                         input: [ "policy", "drop" ],
1631                         output: [ "policy", "drop" ],
1632                         forward: [ "policy", "drop" ],
1633
1634                         drop_invalid: [ "bool" ],
1635                         tcp_reject_code: [ "reject_code", "tcp-reset" ],
1636                         any_reject_code: [ "reject_code", "port-unreachable" ],
1637
1638                         syn_flood: [ "bool" ],
1639                         synflood_protect: [ "bool" ],
1640                         synflood_rate: [ "limit", "25/second" ],
1641                         synflood_burst: [ "int", "50" ],
1642
1643                         tcp_syncookies: [ "bool", "1" ],
1644                         tcp_ecn: [ "int" ],
1645                         tcp_window_scaling: [ "bool", "1" ],
1646
1647                         accept_redirects: [ "bool" ],
1648                         accept_source_route: [ "bool" ],
1649
1650                         auto_helper: [ "bool", "1" ],
1651                         custom_chains: [ "bool", null, UNSUPPORTED ],
1652                         disable_ipv6: [ "bool", null, UNSUPPORTED ],
1653                         flow_offloading: [ "bool", "0" ],
1654                         flow_offloading_hw: [ "bool", "0" ]
1655                 });
1656
1657                 if (defs.synflood_protect === null)
1658                         defs.synflood_protect = defs.syn_flood;
1659
1660                 delete defs.syn_flood;
1661
1662                 this.state.defaults = defs;
1663         },
1664
1665         parse_zone: function(data) {
1666                 let zone = this.parse_options(data, {
1667                         enabled: [ "bool", "1" ],
1668
1669                         name: [ "string", null, REQUIRED ],
1670                         family: [ "family" ],
1671
1672                         network: [ "device", null, PARSE_LIST ],
1673                         device: [ "device", null, PARSE_LIST ],
1674                         subnet: [ "network", null, PARSE_LIST ],
1675
1676                         input: [ "policy", this.state.defaults ? this.state.defaults.input : "drop" ],
1677                         output: [ "policy", this.state.defaults ? this.state.defaults.output : "drop" ],
1678                         forward: [ "policy", this.state.defaults ? this.state.defaults.forward : "drop" ],
1679
1680                         masq: [ "bool" ],
1681                         masq_allow_invalid: [ "bool" ],
1682                         masq_src: [ "network", null, PARSE_LIST ],
1683                         masq_dest: [ "network", null, PARSE_LIST ],
1684
1685                         masq6: [ "bool" ],
1686
1687                         extra: [ "string", null, UNSUPPORTED ],
1688                         extra_src: [ "string", null, UNSUPPORTED ],
1689                         extra_dest: [ "string", null, UNSUPPORTED ],
1690
1691                         mtu_fix: [ "bool" ],
1692                         custom_chains: [ "bool", null, UNSUPPORTED ],
1693
1694                         log: [ "int" ],
1695                         log_limit: [ "limit", null, UNSUPPORTED ],
1696
1697                         auto_helper: [ "bool", "1" ],
1698                         helper: [ "cthelper", null, PARSE_LIST ],
1699
1700                         counter: [ "bool", "1" ]
1701                 });
1702
1703                 if (zone === false) {
1704                         this.warn_section(data, "skipped due to invalid options");
1705                         return;
1706                 }
1707                 else if (!zone.enabled) {
1708                         this.warn_section(data, "is disabled, ignoring section");
1709                         return;
1710                 }
1711                 else if (zone.helper && !zone.helper.available) {
1712                         this.warn_section(data, "uses unavailable ct helper '" + zone.helper.name + "', ignoring section");
1713                         return;
1714                 }
1715
1716                 if (zone.mtu_fix && this.kernel < 0x040a0000) {
1717                         this.warn_section(data, "option 'mtu_fix' requires kernel 4.10 or later");
1718                         return;
1719                 }
1720
1721                 if (this.state.defaults && this.state.defaults.auto_helper === false)
1722                         zone.auto_helper = false;
1723
1724                 let match_devices = [];
1725                 let related_subnets = [];
1726                 let related_ubus_networks = [];
1727                 let match_subnets, masq_src_subnets, masq_dest_subnets;
1728
1729                 for (let name, net in this.state.networks) {
1730                         if (net.zone === zone.name)
1731                                 push(related_ubus_networks, { invert: false, device: name });
1732                 }
1733
1734                 for (let e in [ ...to_array(zone.network), ...related_ubus_networks ]) {
1735                         if (exists(this.state.networks, e.device)) {
1736                                 let net = this.state.networks[e.device];
1737
1738                                 if (net.device) {
1739                                         push(match_devices, {
1740                                                 invert: e.invert,
1741                                                 device: net.device
1742                                         });
1743                                 }
1744
1745                                 push(related_subnets, ...(net.ipaddrs || []));
1746                         }
1747                 }
1748
1749                 push(match_devices, ...to_array(zone.device));
1750
1751                 match_subnets = subnets_split_af(zone.subnet);
1752                 masq_src_subnets = subnets_split_af(zone.masq_src);
1753                 masq_dest_subnets = subnets_split_af(zone.masq_dest);
1754
1755                 push(related_subnets, ...(match_subnets[0] || []), ...(match_subnets[1] || []));
1756
1757                 let match_rules = [];
1758
1759                 let add_rule = (family, devices, subnets, zone) => {
1760                         let r = {};
1761
1762                         r.family = family;
1763
1764                         r.devices_pos = null_if_empty(devices[0]);
1765                         r.devices_neg = null_if_empty(devices[1]);
1766                         r.devices_neg_wildcard = null_if_empty(devices[2]);
1767
1768                         r.subnets_pos = map(filter_pos(subnets), this.cidr);
1769                         r.subnets_neg = map(filter_neg(subnets), this.cidr);
1770
1771                         push(match_rules, r);
1772                 };
1773
1774                 let family = infer_family(zone.family, [
1775                         zone.helper, "ct helper"
1776                 ]);
1777
1778                 // group non-inverted device matches into wildcard and non-wildcard ones
1779                 let devices = [], plain_devices = [], plain_invert_devices = [], wildcard_invert_devices = [];
1780
1781                 for (let device in match_devices) {
1782                         let m = match(device.device, /^([^+]*)(\+)?$/);
1783
1784                         if (!m) {
1785                                 this.warn_section(data, "skipping invalid wildcard pattern '" + device.device + '"');
1786                                 continue;
1787                         }
1788
1789                         // filter `+` (match any device) since nftables does not support
1790                         // wildcard only matches
1791                         if (!device.invert && m[0] == '+')
1792                                 continue;
1793
1794                         // replace inverted `+` (match no device) with invalid pattern
1795                         if (device.invert && m[0] == '+') {
1796                                 device.device = '/never/';
1797                                 device.invert = false;
1798                         }
1799
1800                         // replace "name+" matches with "name*"
1801                         else if (m[2] == '+')
1802                                 device.device = m[1] + '*';
1803
1804                         device.wildcard = !!m[2];
1805
1806                         if (!device.invert && device.wildcard)
1807                                 push(devices, [ [ device.device ], plain_invert_devices, wildcard_invert_devices ]);
1808                         else if (!device.invert)
1809                                 push(plain_devices, device.device);
1810                         else if (device.wildcard)
1811                                 push(wildcard_invert_devices, device.device);
1812                         else
1813                                 push(plain_invert_devices, device.device);
1814                 }
1815
1816                 if (length(plain_devices))
1817                         push(devices, [
1818                                 plain_devices,
1819                                 plain_invert_devices,
1820                                 wildcard_invert_devices
1821                         ]);
1822                 else if (!length(devices))
1823                         push(devices, [
1824                                 null,
1825                                 plain_invert_devices,
1826                                 wildcard_invert_devices
1827                         ]);
1828
1829                 // emit zone jump rules for each device group
1830                 if (length(match_devices) || length(match_subnets[0]) || length(match_subnets[1])) {
1831                         for (let devgroup in devices) {
1832                                 // check if there's no AF specific bits, in this case we can do AF agnostic matching
1833                                 if (!family && !length(match_subnets[0]) && !length(match_subnets[1])) {
1834                                         add_rule(0, devgroup, null, zone);
1835                                 }
1836
1837                                 // we need to emit one or two AF specific rules
1838                                 else {
1839                                         if (family_is_ipv4(zone) && length(match_subnets[0]))
1840                                                 add_rule(4, devgroup, match_subnets[0], zone);
1841
1842                                         if (family_is_ipv6(zone) && length(match_subnets[1]))
1843                                                 add_rule(6, devgroup, match_subnets[1], zone);
1844                                 }
1845                         }
1846                 }
1847
1848                 zone.match_rules = match_rules;
1849
1850                 if (masq_src_subnets[0]) {
1851                         zone.masq4_src_pos = map(filter_pos(masq_src_subnets[0]), this.cidr);
1852                         zone.masq4_src_neg = map(filter_neg(masq_src_subnets[0]), this.cidr);
1853                 }
1854
1855                 if (masq_src_subnets[1]) {
1856                         zone.masq6_src_pos = map(filter_pos(masq_src_subnets[1]), this.cidr);
1857                         zone.masq6_src_neg = map(filter_neg(masq_src_subnets[1]), this.cidr);
1858                 }
1859
1860                 if (masq_dest_subnets[0]) {
1861                         zone.masq4_dest_pos = map(filter_pos(masq_dest_subnets[0]), this.cidr);
1862                         zone.masq4_dest_neg = map(filter_neg(masq_dest_subnets[0]), this.cidr);
1863                 }
1864
1865                 if (masq_dest_subnets[1]) {
1866                         zone.masq6_dest_pos = map(filter_pos(masq_dest_subnets[1]), this.cidr);
1867                         zone.masq6_dest_neg = map(filter_neg(masq_dest_subnets[1]), this.cidr);
1868                 }
1869
1870                 zone.sflags = {};
1871                 zone.sflags[zone.input] = true;
1872
1873                 zone.dflags = {};
1874                 zone.dflags[zone.output] = true;
1875                 zone.dflags[zone.forward] = true;
1876
1877                 zone.match_devices = map(filter(match_devices, d => !d.invert), d => d.device);
1878                 zone.match_subnets = map(filter(related_subnets, s => !s.invert), this.cidr);
1879
1880                 zone.related_subnets = related_subnets;
1881
1882                 if (zone.masq || zone.masq6)
1883                         zone.dflags.snat = true;
1884
1885                 if ((zone.auto_helper && !(zone.masq || zone.masq6)) || length(zone.helper)) {
1886                         zone.dflags.helper = true;
1887
1888                         for (let helper in (length(zone.helper) ? zone.helper : this.state.helpers)) {
1889                                 if (!helper.available)
1890                                         continue;
1891
1892                                 for (let proto in helper.proto) {
1893                                         this.state.rules = this.state.rules || [];
1894                                         push(this.state.rules, {
1895                                                 chain: "helper_" + zone.name,
1896                                                 family: helper.family,
1897                                                 name: helper.description || helper.name,
1898                                                 proto: proto,
1899                                                 src: zone,
1900                                                 dports_pos: [ this.port(helper.port) ],
1901                                                 target: "helper",
1902                                                 set_helper: helper
1903                                         });
1904                                 }
1905                         }
1906                 }
1907
1908                 this.state.zones = this.state.zones || [];
1909                 push(this.state.zones, zone);
1910         },
1911
1912         parse_forwarding: function(data) {
1913                 let fwd = this.parse_options(data, {
1914                         enabled: [ "bool", "1" ],
1915
1916                         name: [ "string" ],
1917                         family: [ "family" ],
1918
1919                         src: [ "zone_ref", null, REQUIRED ],
1920                         dest: [ "zone_ref", null, REQUIRED ]
1921                 });
1922
1923                 if (fwd === false) {
1924                         this.warn_section(data, "skipped due to invalid options");
1925                         return;
1926                 }
1927                 else if (!fwd.enabled) {
1928                         this.warn_section(data, "is disabled, ignoring section");
1929                         return;
1930                 }
1931
1932                 let add_rule = (family, fwd) => {
1933                         let f = {
1934                                 ...fwd,
1935
1936                                 family: family,
1937                                 proto: { any: true }
1938                         };
1939
1940                         f.name = fwd.name || sprintf("Accept %s to %s forwarding",
1941                                 fwd.src.any ? "any" : fwd.src.zone.name,
1942                                 fwd.dest.any ? "any" : fwd.dest.zone.name);
1943
1944                         f.chain = fwd.src.any ? "forward" : sprintf("forward_%s", fwd.src.zone.name);
1945
1946                         if (fwd.dest.any)
1947                                 f.target = "accept";
1948                         else
1949                                 f.jump_chain = sprintf("accept_to_%s", fwd.dest.zone.name);
1950
1951                         this.state.rules = this.state.rules || [];
1952                         push(this.state.rules, f);
1953                 };
1954
1955
1956                 let family = fwd.family;
1957
1958                 /* inherit family restrictions from related zones */
1959                 if (family === 0 || family === null) {
1960                         let f1 = fwd.src.zone ? fwd.src.zone.family : 0;
1961                         let f2 = fwd.dest.zone ? fwd.dest.zone.family : 0;
1962
1963                         if (f1 != 0 && f2 != 0 && f1 != f2) {
1964                                 this.warn_section(data,
1965                                         sprintf("references src %s restricted to %s and dest restricted to %s, ignoring forwarding",
1966                                                 fwd.src.zone.name, this.nfproto(f1, true),
1967                                                 fwd.dest.zone.name, this.nfproto(f2, true)));
1968
1969                                 return;
1970                         }
1971                         else if (f1) {
1972                                 this.warn_section(data,
1973                                         sprintf("inheriting %s restriction from src %s",
1974                                                 this.nfproto(f1, true), fwd.src.zone.name));
1975
1976                                 family = f1;
1977                         }
1978                         else if (f2) {
1979                                 this.warn_section(data,
1980                                         sprintf("inheriting %s restriction from dest %s",
1981                                                 this.nfproto(f2, true), fwd.dest.zone.name));
1982
1983                                 family = f2;
1984                         }
1985                 }
1986
1987                 add_rule(family, fwd);
1988
1989                 if (fwd.dest.zone)
1990                         fwd.dest.zone.dflags.accept = true;
1991         },
1992
1993         parse_rule: function(data) {
1994                 let rule = this.parse_options(data, {
1995                         enabled: [ "bool", "1" ],
1996
1997                         name: [ "string", this.section_id(data[".name"]) ],
1998                         _name: [ "string", null, DEPRECATED ],
1999                         family: [ "family" ],
2000
2001                         src: [ "zone_ref" ],
2002                         dest: [ "zone_ref" ],
2003
2004                         device: [ "device" ],
2005                         direction: [ "direction" ],
2006
2007                         ipset: [ "setmatch" ],
2008                         helper: [ "cthelper" ],
2009                         set_helper: [ "cthelper", null, NO_INVERT ],
2010
2011                         proto: [ "protocol", "tcpudp", PARSE_LIST | FLATTEN_LIST ],
2012
2013                         src_ip: [ "network", null, PARSE_LIST ],
2014                         src_mac: [ "mac", null, PARSE_LIST ],
2015                         src_port: [ "port", null, PARSE_LIST ],
2016
2017                         dest_ip: [ "network", null, PARSE_LIST ],
2018                         dest_port: [ "port", null, PARSE_LIST ],
2019
2020                         icmp_type: [ "icmptype", null, PARSE_LIST ],
2021                         extra: [ "string", null, UNSUPPORTED ],
2022
2023                         limit: [ "limit" ],
2024                         limit_burst: [ "int" ],
2025
2026                         utc_time: [ "bool" ],
2027                         start_date: [ "date" ],
2028                         stop_date: [ "date" ],
2029                         start_time: [ "time" ],
2030                         stop_time: [ "time" ],
2031                         weekdays: [ "weekdays" ],
2032                         monthdays: [ "monthdays", null, UNSUPPORTED ],
2033
2034                         mark: [ "mark" ],
2035                         set_mark: [ "mark", null, NO_INVERT ],
2036                         set_xmark: [ "mark", null, NO_INVERT ],
2037
2038                         dscp: [ "dscp" ],
2039                         set_dscp: [ "dscp", null, NO_INVERT ],
2040
2041                         counter: [ "bool", "1" ],
2042
2043                         target: [ "target" ]
2044                 });
2045
2046                 if (rule === false) {
2047                         this.warn_section(data, "skipped due to invalid options");
2048                         return;
2049                 }
2050                 else if (!rule.enabled) {
2051                         this.warn_section(data, "is disabled, ignoring section");
2052                         return;
2053                 }
2054
2055                 if (rule.target in ["helper", "notrack"] && (!rule.src || !rule.src.zone)) {
2056                         this.warn_section(data, "must specify a source zone for target '" + rule.target + "'");
2057                         return;
2058                 }
2059                 else if (rule.target == "dscp" && !rule.set_dscp) {
2060                         this.warn_section(data, "must specify option 'set_dscp' for target 'dscp'");
2061                         return;
2062                 }
2063                 else if (rule.target == "mark" && !rule.set_mark && !rule.set_xmark) {
2064                         this.warn_section(data, "must specify option 'set_mark' or 'set_xmark' for target 'mark'");
2065                         return;
2066                 }
2067                 else if (rule.target == "helper" && !rule.set_helper) {
2068                         this.warn_section(data, "must specify option 'set_helper' for target 'helper'");
2069                         return;
2070                 }
2071
2072                 let ipset;
2073
2074                 if (rule.ipset) {
2075                         ipset = filter(this.state.ipsets, s => (s.name == rule.ipset.name))[0];
2076
2077                         if (!ipset) {
2078                                 this.warn_section(data, "references unknown set '" + rule.ipset.name + "'");
2079                                 return;
2080                         }
2081
2082                         if (('inet_service' in ipset.types) && !ensure_tcpudp(rule.proto)) {
2083                                 this.warn_section(data, "references named set with port match but no UDP/TCP protocol, ignoring section");
2084                                 return;
2085                         }
2086                 }
2087
2088                 let need_src_action_chain = (rule) => (rule.src && rule.src.zone && rule.src.zone.log && rule.target != "accept");
2089
2090                 let add_rule = (family, proto, saddrs, daddrs, sports, dports, icmptypes, icmpcodes, ipset, rule) => {
2091                         let r = {
2092                                 ...rule,
2093
2094                                 family: family,
2095                                 proto: proto,
2096                                 has_addrs: !!(length(saddrs) || length(daddrs)),
2097                                 has_ports: !!(length(sports) || length(dports)),
2098                                 saddrs_pos: map(filter_pos(saddrs), this.cidr),
2099                                 saddrs_neg: map(filter_neg(saddrs), this.cidr),
2100                                 daddrs_pos: map(filter_pos(daddrs), this.cidr),
2101                                 daddrs_neg: map(filter_neg(daddrs), this.cidr),
2102                                 sports_pos: map(filter_pos(sports), this.port),
2103                                 sports_neg: map(filter_neg(sports), this.port),
2104                                 dports_pos: map(filter_pos(dports), this.port),
2105                                 dports_neg: map(filter_neg(dports), this.port),
2106                                 smacs_pos: map(filter_pos(rule.src_mac), m => m.mac),
2107                                 smacs_neg: map(filter_neg(rule.src_mac), m => m.mac),
2108                                 icmp_types: map(icmptypes, i => (family == 4 ? i.type : i.type6)),
2109                                 icmp_codes: map(icmpcodes, ic => sprintf('%d . %d', (family == 4) ? ic.type : ic.type6, (family == 4) ? ic.code_min : ic.code6_min))
2110                         };
2111
2112                         if (!length(r.icmp_types))
2113                                 delete r.icmp_types;
2114
2115                         if (!length(r.icmp_codes))
2116                                 delete r.icmp_codes;
2117
2118                         if (r.set_mark) {
2119                                 r.set_xmark = {
2120                                         invert: r.set_mark.invert,
2121                                         mark:   r.set_mark.mark,
2122                                         mask:   r.set_mark.mark | r.set_mark.mask
2123                                 };
2124
2125                                 delete r.set_mark;
2126                         }
2127
2128                         let set_types = map_setmatch(ipset, rule.ipset, proto.name);
2129
2130                         if (set_types !== set_types) {
2131                                 this.warn_section(data, "destination MAC address matching not supported");
2132                                 return;
2133                         } else if (set_types) {
2134                                 r.ipset = { ...r.ipset, fields: set_types };
2135                         }
2136
2137                         if (r.target == "notrack") {
2138                                 r.chain = sprintf("notrack_%s", r.src.zone.name);
2139                                 r.src.zone.dflags.notrack = true;
2140                         }
2141                         else if (r.target == "helper") {
2142                                 r.chain = sprintf("helper_%s", r.src.zone.name);
2143                                 r.src.zone.dflags.helper = true;
2144                         }
2145                         else if (r.target == "mark" || r.target == "dscp") {
2146                                 if ((r.src?.any && r.dest?.any) || (r.src?.zone && r.dest?.zone))
2147                                         r.chain = "mangle_forward";
2148                                 else if (r.src?.any && r.dest?.zone)
2149                                         r.chain = "mangle_postrouting";
2150                                 else if (r.src?.zone && r.dest?.any)
2151                                         r.chain = "mangle_prerouting";
2152                                 else if (r.src && !r.dest)
2153                                         r.chain = "mangle_input";
2154                                 else
2155                                         r.chain = "mangle_output";
2156
2157                                 if (r.src?.zone)
2158                                         r.src.zone.dflags[r.target] = true;
2159
2160                                 if (r.dest?.zone)
2161                                         r.dest.zone.dflags[r.target] = true;
2162                         }
2163                         else {
2164                                 r.chain = "output";
2165
2166                                 if (r.src) {
2167                                         if (!r.src.any)
2168                                                 r.chain = sprintf("%s_%s", r.dest ? "forward" : "input", r.src.zone.name);
2169                                         else
2170                                                 r.chain = r.dest ? "forward" : "input";
2171                                 }
2172
2173                                 if (r.dest && !r.src) {
2174                                         if (!r.dest.any)
2175                                                 r.chain = sprintf("output_%s", r.dest.zone.name);
2176                                         else
2177                                                 r.chain = "output";
2178                                 }
2179
2180                                 if (r.dest && !r.dest.any) {
2181                                         r.jump_chain = sprintf("%s_to_%s", r.target, r.dest.zone.name);
2182                                         r.dest.zone.dflags[r.target] = true;
2183                                 }
2184                                 else if (need_src_action_chain(r)) {
2185                                         r.jump_chain = sprintf("%s_from_%s", r.target, r.src.zone.name);
2186                                         r.src.zone.dflags[r.target] = true;
2187                                 }
2188                                 else if (r.target == "reject")
2189                                         r.jump_chain = "handle_reject";
2190                         }
2191
2192                         this.state.rules = this.state.rules || [];
2193                         push(this.state.rules, r);
2194                 };
2195
2196                 for (let proto in rule.proto) {
2197                         let sip, dip, sports, dports, itypes4, itypes6;
2198                         let family = rule.family;
2199
2200                         switch (proto.name) {
2201                         case "icmp":
2202                                 itypes4 = filter(rule.icmp_type || [], family_is_ipv4);
2203                                 itypes6 = filter(rule.icmp_type || [], family_is_ipv6);
2204                                 break;
2205
2206                         case "ipv6-icmp":
2207                                 family = 6;
2208                                 itypes6 = filter(rule.icmp_type || [], family_is_ipv6);
2209                                 break;
2210
2211                         case "tcp":
2212                         case "udp":
2213                                 sports = rule.src_port;
2214                                 dports = rule.dest_port;
2215                                 break;
2216                         }
2217
2218                         family = infer_family(family, [
2219                                 ipset, "set match",
2220                                 rule.src, "source zone",
2221                                 rule.dest, "destination zone",
2222                                 rule.helper, "helper match",
2223                                 rule.set_helper, "helper to set"
2224                         ]);
2225
2226                         if (type(family) == "string") {
2227                                 this.warn_section(data, family + ", skipping");
2228                                 continue;
2229                         }
2230
2231                         sip = subnets_split_af(rule.src_ip);
2232                         dip = subnets_split_af(rule.dest_ip);
2233
2234                         let has_ipv4_specifics = (length(sip[0]) || length(dip[0]) || length(itypes4) || rule.dscp !== null);
2235                         let has_ipv6_specifics = (length(sip[1]) || length(dip[1]) || length(itypes6) || rule.dscp !== null);
2236
2237                         /* if no family was configured, infer target family from IP addresses */
2238                         if (family === null) {
2239                                 if (has_ipv4_specifics && !has_ipv6_specifics)
2240                                         family = 4;
2241                                 else if (has_ipv6_specifics && !has_ipv4_specifics)
2242                                         family = 6;
2243                                 else
2244                                         family = 0;
2245                         }
2246
2247                         /* check if there's no AF specific bits, in this case we can do an AF agnostic rule */
2248                         if (!family && rule.target != "dscp" && !has_ipv4_specifics && !has_ipv6_specifics) {
2249                                 add_rule(0, proto, null, null, sports, dports, null, null, null, rule);
2250                         }
2251
2252                         /* we need to emit one or two AF specific rules */
2253                         else {
2254                                 if (family == 0 || family == 4) {
2255                                         let icmp_types = filter(itypes4, i => (i.code_min == 0 && i.code_max == 0xFF));
2256                                         let icmp_codes = filter(itypes4, i => (i.code_min != 0 || i.code_max != 0xFF));
2257
2258                                         if (length(icmp_types) || (!length(icmp_types) && !length(icmp_codes)))
2259                                                 add_rule(4, proto, sip[0], dip[0], sports, dports, icmp_types, null, ipset, rule);
2260
2261                                         if (length(icmp_codes))
2262                                                 add_rule(4, proto, sip[0], dip[0], sports, dports, null, icmp_codes, ipset, rule);
2263                                 }
2264
2265                                 if (family == 0 || family == 6) {
2266                                         let icmp_types = filter(itypes6, i => (i.code_min == 0 && i.code_max == 0xFF));
2267                                         let icmp_codes = filter(itypes6, i => (i.code_min != 0 || i.code_max != 0xFF));
2268
2269                                         if (length(icmp_types) || (!length(icmp_types) && !length(icmp_codes)))
2270                                                 add_rule(6, proto, sip[1], dip[1], sports, dports, icmp_types, null, ipset, rule);
2271
2272                                         if (length(icmp_codes))
2273                                                 add_rule(6, proto, sip[1], dip[1], sports, dports, null, icmp_codes, ipset, rule);
2274                                 }
2275                         }
2276                 }
2277         },
2278
2279         parse_redirect: function(data) {
2280                 let redir = this.parse_options(data, {
2281                         enabled: [ "bool", "1" ],
2282
2283                         name: [ "string", this.section_id(data[".name"]) ],
2284                         _name: [ "string", null, DEPRECATED ],
2285                         family: [ "family" ],
2286
2287                         src: [ "zone_ref" ],
2288                         dest: [ "zone_ref" ],
2289
2290                         ipset: [ "setmatch" ],
2291                         helper: [ "cthelper", null, NO_INVERT ],
2292
2293                         proto: [ "protocol", "tcpudp", PARSE_LIST | FLATTEN_LIST ],
2294
2295                         src_ip: [ "network" ],
2296                         src_mac: [ "mac", null, PARSE_LIST ],
2297                         src_port: [ "port" ],
2298
2299                         src_dip: [ "network" ],
2300                         src_dport: [ "port" ],
2301
2302                         dest_ip: [ "network" ],
2303                         dest_port: [ "port" ],
2304
2305                         extra: [ "string", null, UNSUPPORTED ],
2306
2307                         limit: [ "limit" ],
2308                         limit_burst: [ "int" ],
2309
2310                         utc_time: [ "bool" ],
2311                         start_date: [ "date" ],
2312                         stop_date: [ "date" ],
2313                         start_time: [ "time" ],
2314                         stop_time: [ "time" ],
2315                         weekdays: [ "weekdays" ],
2316                         monthdays: [ "monthdays", null, UNSUPPORTED ],
2317
2318                         mark: [ "mark" ],
2319
2320                         reflection: [ "bool", "1" ],
2321                         reflection_src: [ "reflection_source", "internal" ],
2322
2323                         reflection_zone: [ "zone_ref", null, PARSE_LIST ],
2324
2325                         counter: [ "bool", "1" ],
2326
2327                         target: [ "target", "dnat" ]
2328                 });
2329
2330                 if (redir === false) {
2331                         this.warn_section(data, "skipped due to invalid options");
2332                         return;
2333                 }
2334                 else if (!redir.enabled) {
2335                         this.warn_section(data, "is disabled, ignoring section");
2336                         return;
2337                 }
2338
2339                 if (!(redir.target in ["dnat", "snat"])) {
2340                         this.warn_section(data, "has invalid target specified, defaulting to dnat");
2341                         redir.target = "dnat";
2342                 }
2343
2344                 let ipset;
2345
2346                 if (redir.ipset) {
2347                         ipset = filter(this.state.ipsets, s => (s.name == redir.ipset.name))[0];
2348
2349                         if (!ipset) {
2350                                 this.warn_section(data, "references unknown set '" + redir.ipset.name + "'");
2351                                 return;
2352                         }
2353
2354                         if (('inet_service' in ipset.types) && !ensure_tcpudp(redir.proto)) {
2355                                 this.warn_section(data, "references named set with port match but no UDP/TCP protocol, ignoring section");
2356                                 return;
2357                         }
2358                 }
2359
2360                 let resolve_dest = (redir) => {
2361                         for (let zone in this.state.zones) {
2362                                 for (let addr in zone.related_subnets) {
2363                                         if (redir.dest_ip.family != addr.family)
2364                                                 continue;
2365
2366                                         let a = apply_mask(redir.dest_ip.addr, addr.bits);
2367                                         let b = apply_mask(addr.addr, addr.bits);
2368
2369                                         if (a != b)
2370                                                 continue;
2371
2372                                         redir.dest = {
2373                                                 any: false,
2374                                                 zone: zone
2375                                         };
2376
2377                                         return true;
2378                                 }
2379                         }
2380
2381                         return false;
2382                 };
2383
2384                 if (redir.target == "dnat") {
2385                         if (!redir.src)
2386                                 return this.warn_section(r, "has no source specified");
2387                         else if (redir.src.any)
2388                                 return this.warn_section(r, "must not have source '*' for dnat target");
2389                         else if (redir.dest_ip && redir.dest_ip.invert)
2390                                 return this.warn_section(r, "must not specify a negated 'dest_ip' value");
2391
2392                         if (!redir.dest && redir.dest_ip && resolve_dest(redir))
2393                                 this.warn_section(r, "does not specify a destination, assuming '" + redir.dest.zone.name + "'");
2394
2395                         if (!redir.dest_port)
2396                                 redir.dest_port = redir.src_dport;
2397
2398                         if (redir.reflection && redir.dest && redir.dest.zone && redir.src.zone.masq) {
2399                                 redir.dest.zone.dflags.accept = true;
2400                                 redir.dest.zone.dflags.dnat = true;
2401                                 redir.dest.zone.dflags.snat = true;
2402                         }
2403
2404                         if (redir.helper)
2405                                 redir.src.zone.dflags.helper = true;
2406
2407                         redir.src.zone.dflags[redir.target] = true;
2408                 }
2409                 else {
2410                         if (!redir.dest)
2411                                 return this.warn_section(data, "has no destination specified");
2412                         else if (redir.dest.any)
2413                                 return this.warn_section(data, "must not have destination '*' for snat target");
2414                         else if (!redir.src_dip)
2415                                 return this.warn_section(data, "has no 'src_dip' option specified");
2416                         else if (redir.src_dip.invert)
2417                                 return this.warn_section(data, "must not specify a negated 'src_dip' value");
2418                         else if (redir.src_mac)
2419                                 return this.warn_section(data, "must not use 'src_mac' option for snat target");
2420                         else if (redir.helper)
2421                                 return this.warn_section(data, "must not use 'helper' option for snat target");
2422
2423                         redir.dest.zone.dflags[redir.target] = true;
2424                 }
2425
2426
2427                 let add_rule = (family, proto, saddrs, daddrs, raddrs, sport, dport, rport, ipset, redir) => {
2428                         let r = {
2429                                 ...redir,
2430
2431                                 family: family,
2432                                 proto: proto,
2433                                 has_addrs: !!(length(saddrs) || length(daddrs)),
2434                                 has_ports: !!(sport || dport || rport),
2435                                 saddrs_pos: map(filter_pos(saddrs), this.cidr),
2436                                 saddrs_neg: map(filter_neg(saddrs), this.cidr),
2437                                 daddrs_pos: map(filter_pos(daddrs), this.cidr),
2438                                 daddrs_neg: map(filter_neg(daddrs), this.cidr),
2439                                 sports_pos: map(filter_pos(to_array(sport)), this.port),
2440                                 sports_neg: map(filter_neg(to_array(sport)), this.port),
2441                                 dports_pos: map(filter_pos(to_array(dport)), this.port),
2442                                 dports_neg: map(filter_neg(to_array(dport)), this.port),
2443                                 smacs_pos: map(filter_pos(redir.src_mac), m => m.mac),
2444                                 smacs_neg: map(filter_neg(redir.src_mac), m => m.mac),
2445
2446                                 raddr: raddrs ? raddrs[0] : null,
2447                                 rport: rport
2448                         };
2449
2450                         let set_types = map_setmatch(ipset, redir.ipset, proto.name);
2451
2452                         if (set_types !== set_types) {
2453                                 this.warn_section(data, "destination MAC address matching not supported");
2454                                 return;
2455                         } else if (set_types) {
2456                                 r.ipset = { ...r.ipset, fields: set_types };
2457                         }
2458
2459                         switch (r.target) {
2460                         case "dnat":
2461                                 r.chain = sprintf("dstnat_%s", r.src.zone.name);
2462
2463                                 if (!r.raddr)
2464                                         r.target = "redirect";
2465
2466                                 break;
2467
2468                         case "snat":
2469                                 r.chain = sprintf("srcnat_%s", r.dest.zone.name);
2470                                 break;
2471                         }
2472
2473                         this.state.redirects = this.state.redirects || [];
2474                         push(this.state.redirects, r);
2475                 };
2476
2477                 let to_hostaddr = (a) => {
2478                         let bits = (a.family == 4) ? 32 : 128;
2479
2480                         return {
2481                                 family: a.family,
2482                                 addr: apply_mask(a.addr, bits),
2483                                 bits: bits
2484                         };
2485                 };
2486
2487                 for (let proto in redir.proto) {
2488                         let sip, dip, rip, iip, eip, refip, sport, dport, rport;
2489                         let family = redir.family;
2490
2491                         if (proto.name == "ipv6-icmp")
2492                                 family = 6;
2493
2494                         family = infer_family(family, [
2495                                 ipset, "set match",
2496                                 redir.src, "source zone",
2497                                 redir.dest, "destination zone",
2498                                 redir.helper, "helper match"
2499                         ]);
2500
2501                         if (type(family) == "string") {
2502                                 this.warn_section(data, family + ", skipping");
2503                                 continue;
2504                         }
2505
2506                         switch (redir.target) {
2507                         case "dnat":
2508                                 sip = subnets_split_af(redir.src_ip);
2509                                 dip = subnets_split_af(redir.src_dip);
2510                                 rip = subnets_split_af(redir.dest_ip);
2511
2512                                 switch (proto.name) {
2513                                 case "tcp":
2514                                 case "udp":
2515                                         sport = redir.src_port;
2516                                         dport = redir.src_dport;
2517                                         rport = redir.dest_port;
2518                                         break;
2519                                 }
2520
2521                                 /* build reflection rules */
2522                                 if (redir.reflection && (length(rip[0]) || length(rip[1])) &&
2523                                     redir.src && redir.src.zone && redir.src.zone[family == 4 ? "masq" : "masq6"] &&
2524                                     redir.dest && redir.dest.zone) {
2525
2526                                         let refredir = {
2527                                                 name: redir.name + " (reflection)",
2528
2529                                                 helper: redir.helper,
2530
2531                                                 // XXX: this likely makes no sense for reflection rules
2532                                                 //src_mac: redir.src_mac,
2533
2534                                                 limit: redir.limit,
2535                                                 limit_burst: redir.limit_burst,
2536
2537                                                 start_date: redir.start_date,
2538                                                 stop_date: redir.stop_date,
2539                                                 start_time: redir.start_time,
2540                                                 stop_time: redir.stop_time,
2541                                                 weekdays: redir.weekdays,
2542
2543                                                 mark: redir.mark
2544                                         };
2545
2546                                         let eaddrs = subnets_split_af(length(dip) ? dip : { addrs: redir.src.zone.related_subnets });
2547                                         let rzones = length(redir.reflection_zone) ? redir.reflection_zone : [ redir.dest ];
2548
2549                                         for (let rzone in rzones) {
2550                                                 if (!is_family(rzone, family)) {
2551                                                         this.warn_section(data,
2552                                                                 sprintf("is restricted to IPv%d but referenced reflection zone is IPv%d only, skipping",
2553                                                                         family, rzone.family));
2554                                                         continue;
2555                                                 }
2556
2557                                                 let iaddrs = subnets_split_af({ addrs: rzone.zone.related_subnets });
2558                                                 let refaddrs = (redir.reflection_src == "internal") ? iaddrs : eaddrs;
2559
2560                                                 refaddrs = [
2561                                                         map(refaddrs[0], to_hostaddr),
2562                                                         map(refaddrs[1], to_hostaddr)
2563                                                 ];
2564
2565                                                 eaddrs = [
2566                                                         map(eaddrs[0], to_hostaddr),
2567                                                         map(eaddrs[1], to_hostaddr)
2568                                                 ];
2569
2570                                                 for (let i = 0; i <= 1; i++) {
2571                                                         if (length(rip[i])) {
2572                                                                 refredir.src = rzone;
2573                                                                 refredir.dest = null;
2574                                                                 refredir.target = "dnat";
2575                                                                 add_rule(i ? 6 : 4, proto, iaddrs[i], eaddrs[i], rip[i], sport, dport, rport, null, refredir);
2576
2577                                                                 for (let refaddr in refaddrs[i]) {
2578                                                                         refredir.src = null;
2579                                                                         refredir.dest = rzone;
2580                                                                         refredir.target = "snat";
2581                                                                         add_rule(i ? 6 : 4, proto, iaddrs[i], rip[i], [ refaddr ], null, rport, null, null, refredir);
2582                                                                 }
2583                                                         }
2584                                                 }
2585                                         }
2586                                 }
2587
2588
2589                                 break;
2590
2591                         case "snat":
2592                                 sip = subnets_split_af(redir.src_ip);
2593                                 dip = subnets_split_af(redir.dest_ip);
2594                                 rip = subnets_split_af(redir.src_dip);
2595
2596                                 switch (proto.name) {
2597                                 case "tcp":
2598                                 case "udp":
2599                                         sport = redir.src_port;
2600                                         dport = redir.dest_port;
2601                                         rport = redir.src_dport;
2602                                         break;
2603                                 }
2604
2605                                 break;
2606                         }
2607
2608                         if (length(rip[0]) > 1 || length(rip[1]) > 1)
2609                                 this.warn_section(data, "specifies multiple rewrite addresses, using only first one");
2610
2611                         /* check if there's no AF specific bits, in this case we can do an AF agnostic rule */
2612                         if (!family && !length(sip[0]) && !length(sip[1]) && !length(dip[0]) && !length(dip[1]) && !length(rip[0]) && !length(rip[1])) {
2613                                 /* for backwards compatibility, treat unspecified family as IPv4 unless user explicitly requested any (0) */
2614                                 if (family == null)
2615                                         family = 4;
2616
2617                                 add_rule(family, proto, null, null, null, sport, dport, rport, null, redir);
2618                         }
2619
2620                         /* we need to emit one or two AF specific rules */
2621                         else {
2622                                 if ((!family || family == 4) && (length(sip[0]) || length(dip[0]) || length(rip[0])))
2623                                         add_rule(4, proto, sip[0], dip[0], rip[0], sport, dport, rport, ipset, redir);
2624
2625                                 if ((!family || family == 6) && (length(sip[1]) || length(dip[1]) || length(rip[1])))
2626                                         add_rule(6, proto, sip[1], dip[1], rip[1], sport, dport, rport, ipset, redir);
2627                         }
2628                 }
2629         },
2630
2631         parse_nat: function(data) {
2632                 let snat = this.parse_options(data, {
2633                         enabled: [ "bool", "1" ],
2634
2635                         name: [ "string", this.section_id(data[".name"]) ],
2636                         family: [ "family", "4" ],
2637
2638                         src: [ "zone_ref" ],
2639                         device: [ "string" ],
2640
2641                         ipset: [ "setmatch", null, UNSUPPORTED ],
2642
2643                         proto: [ "protocol", "all", PARSE_LIST | FLATTEN_LIST ],
2644
2645                         src_ip: [ "network" ],
2646                         src_port: [ "port" ],
2647
2648                         snat_ip: [ "network", null, NO_INVERT ],
2649                         snat_port: [ "port", null, NO_INVERT ],
2650
2651                         dest_ip: [ "network" ],
2652                         dest_port: [ "port" ],
2653
2654                         extra: [ "string", null, UNSUPPORTED ],
2655
2656                         limit: [ "limit" ],
2657                         limit_burst: [ "int" ],
2658
2659                         connlimit_ports: [ "bool" ],
2660
2661                         utc_time: [ "bool" ],
2662                         start_date: [ "date" ],
2663                         stop_date: [ "date" ],
2664                         start_time: [ "time" ],
2665                         stop_time: [ "time" ],
2666                         weekdays: [ "weekdays" ],
2667                         monthdays: [ "monthdays", null, UNSUPPORTED ],
2668
2669                         mark: [ "mark" ],
2670
2671                         target: [ "target", "masquerade" ]
2672                 });
2673
2674                 if (snat === false) {
2675                         this.warn_section(data, "skipped due to invalid options");
2676                         return;
2677                 }
2678                 else if (!snat.enabled) {
2679                         this.warn_section(data, "is disabled, ignoring section");
2680                         return;
2681                 }
2682
2683                 if (!(snat.target in ["accept", "snat", "masquerade"])) {
2684                         this.warn_section(data, "has invalid target specified, defaulting to masquerade");
2685                         snat.target = "masquerade";
2686                 }
2687
2688                 if (snat.target == "snat" && !snat.snat_ip && !snat.snat_port) {
2689                         this.warn_section(data, "needs either 'snat_ip' or 'snat_port' for target snat, ignoring section");
2690                         return;
2691                 }
2692                 else if (snat.target != "snat" && snat.snat_ip) {
2693                         this.warn_section(data, "must not use 'snat_ip' for non-snat target, ignoring section");
2694                         return;
2695                 }
2696                 else if (snat.target != "snat" && snat.snat_port) {
2697                         this.warn_section(data, "must not use 'snat_port' for non-snat target, ignoring section");
2698                         return;
2699                 }
2700
2701                 if ((snat.snat_port || snat.src_port || snat.dest_port) && !ensure_tcpudp(snat.proto)) {
2702                         this.warn_section(data, "specifies ports but no UDP/TCP protocol, ignoring section");
2703                         return;
2704                 }
2705
2706                 if (snat.src && snat.src.zone)
2707                         snat.src.zone.dflags.snat = true;
2708
2709                 let add_rule = (family, proto, saddrs, daddrs, raddrs, sport, dport, rport, snat) => {
2710                         let n = {
2711                                 ...snat,
2712
2713                                 family: family,
2714                                 proto: proto,
2715                                 has_addrs: !!(length(saddrs) || length(daddrs) || length(raddrs)),
2716                                 has_ports: !!(sport || dport),
2717                                 saddrs_pos: map(filter_pos(saddrs), this.cidr),
2718                                 saddrs_neg: map(filter_neg(saddrs), this.cidr),
2719                                 daddrs_pos: map(filter_pos(daddrs), this.cidr),
2720                                 daddrs_neg: map(filter_neg(daddrs), this.cidr),
2721                                 sports_pos: map(filter_pos(to_array(sport)), this.port),
2722                                 sports_neg: map(filter_neg(to_array(sport)), this.port),
2723                                 dports_pos: map(filter_pos(to_array(dport)), this.port),
2724                                 dports_neg: map(filter_neg(to_array(dport)), this.port),
2725
2726                                 raddr: raddrs ? raddrs[0] : null,
2727                                 rport: rport,
2728
2729                                 chain: (snat.src && snat.src.zone) ? sprintf("srcnat_%s", snat.src.zone.name) : "srcnat"
2730                         };
2731
2732                         this.state.redirects = this.state.redirects || [];
2733                         push(this.state.redirects, n);
2734                 };
2735
2736                 for (let proto in snat.proto) {
2737                         let sip, dip, rip, sport, dport, rport;
2738                         let family = snat.family;
2739
2740                         sip = subnets_split_af(snat.src_ip);
2741                         dip = subnets_split_af(snat.dest_ip);
2742                         rip = subnets_split_af(snat.snat_ip);
2743
2744                         switch (proto.name) {
2745                         case "tcp":
2746                         case "udp":
2747                                 sport = snat.src_port;
2748                                 dport = snat.dest_port;
2749                                 rport = snat.snat_port;
2750                                 break;
2751                         }
2752
2753                         if (length(rip[0]) > 1 || length(rip[1]) > 1)
2754                                 this.warn_section(data, "specifies multiple rewrite addresses, using only first one");
2755
2756                         /* inherit family restrictions from related zones */
2757                         if (family === 0 || family === null) {
2758                                 let f = (rule.src && rule.src.zone) ? rule.src.zone.family : 0;
2759
2760                                 if (f) {
2761                                         this.warn_section(r,
2762                                                 sprintf("inheriting %s restriction from src %s",
2763                                                         this.nfproto(f1, true), rule.src.zone.name));
2764
2765                                         family = f;
2766                                 }
2767                         }
2768
2769                         /* if no family was configured, infer target family from IP addresses */
2770                         if (family === null) {
2771                                 if ((length(sip[0]) || length(dip[0]) || length(rip[0])) && !length(sip[1]) && !length(dip[1]) && !length(rip[1]))
2772                                         family = 4;
2773                                 else if ((length(sip[1]) || length(dip[1]) || length(rip[1])) && !length(sip[0]) && !length(dip[0]) && !length(rip[0]))
2774                                         family = 6;
2775                                 else
2776                                         family = 0;
2777                         }
2778
2779                         /* check if there's no AF specific bits, in this case we can do an AF agnostic rule */
2780                         if (!family && !length(sip[0]) && !length(sip[1]) && !length(dip[0]) && !length(dip[1]) && !length(rip[0]) && !length(rip[1])) {
2781                                 add_rule(0, proto, null, null, null, sport, dport, rport, snat);
2782                         }
2783
2784                         /* we need to emit one or two AF specific rules */
2785                         else {
2786                                 if (family == 0 || family == 4)
2787                                         add_rule(4, proto, sip[0], dip[0], rip[0], sport, dport, rport, snat);
2788
2789                                 if (family == 0 || family == 6)
2790                                         add_rule(6, proto, sip[1], dip[1], rip[1], sport, dport, rport, snat);
2791                         }
2792                 }
2793         },
2794
2795         parse_ipset: function(data) {
2796                 let ipset = this.parse_options(data, {
2797                         enabled: [ "bool", "1" ],
2798                         reload_set: [ "bool" ],
2799                         counters: [ "bool" ],
2800                         comment: [ "bool" ],
2801
2802                         name: [ "string", null, REQUIRED ],
2803                         family: [ "family", "4" ],
2804
2805                         storage: [ "string", null, UNSUPPORTED ],
2806                         match: [ "ipsettype", null, PARSE_LIST ],
2807
2808                         iprange: [ "string", null, UNSUPPORTED ],
2809                         portrange: [ "string", null, UNSUPPORTED ],
2810
2811                         netmask: [ "int", null, UNSUPPORTED ],
2812                         maxelem: [ "int" ],
2813                         hashsize: [ "int", null, UNSUPPORTED ],
2814                         timeout: [ "int", "-1" ],
2815
2816                         external: [ "string", null, UNSUPPORTED ],
2817
2818                         entry: [ "string", null, PARSE_LIST ],
2819                         loadfile: [ "string" ]
2820                 });
2821
2822                 if (ipset === false) {
2823                         this.warn_section(data, "skipped due to invalid options");
2824                         return;
2825                 }
2826                 else if (!ipset.enabled) {
2827                         this.warn_section(data, "is disabled, ignoring section");
2828                         return;
2829                 }
2830
2831                 if (ipset.family == 0) {
2832                         this.warn_section(data, "must not specify family 'any'");
2833                         return;
2834                 }
2835                 else if (!length(ipset.match)) {
2836                         this.warn_section(data, "has no datatypes assigned");
2837                         return;
2838                 }
2839
2840                 let dirs = map(ipset.match, m => m[0]),
2841                     types = map(ipset.match, m => m[1]),
2842                     interval = false;
2843
2844                 if ("set" in types) {
2845                         this.warn_section(data, "match type 'set' is not supported");
2846                         return;
2847                 }
2848
2849                 if ("net" in types) {
2850                         if (this.kernel < 0x05060000) {
2851                                 this.warn_section(data, "match type 'net' requires kernel 5.6 or later");
2852                                 return;
2853                         }
2854
2855                         interval = true;
2856                 }
2857
2858                 let s = {
2859                         ...ipset,
2860
2861                         fw4types: types,
2862
2863                         types: map(types, (t) => {
2864                                 switch (t) {
2865                                 case 'ip':
2866                                 case 'net':
2867                                         return (ipset.family == 4) ? 'ipv4_addr' : 'ipv6_addr';
2868
2869                                 case 'mac':
2870                                         return 'ether_addr';
2871
2872                                 case 'port':
2873                                         return 'inet_service';
2874                                 }
2875                         }),
2876
2877                         directions: dirs,
2878                         interval: interval
2879                 };
2880
2881                 let self = this;
2882                 s.entries = filter(map(ipset.entry, (e) => {
2883                         let v = self.parse_ipsetentry(e, s);
2884
2885                         if (!v)
2886                                 self.warn_section(data, "ignoring invalid ipset entry '" + e + "'");
2887
2888                         return v;
2889                 }), (e) => (e != null));
2890
2891                 this.state.ipsets = this.state.ipsets || [];
2892                 push(this.state.ipsets, s);
2893         }
2894 };