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