config.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #define _GNU_SOURCE
  15 #include <string.h>
  16 #include <stdlib.h>
  17 #include <stdio.h>
  18
  19 #include <uci.h>
  20
  21 #include "netifd.h"
  22 #include "interface.h"
  23 #include "interface-ip.h"
  24 #include "iprule.h"
  25 #include "proto.h"
  26 #include "wireless.h"
  27 #include "config.h"
  28
  29 bool config_init = false;
  30
  31 static struct uci_context *uci_ctx;
  32 static struct uci_package *uci_network;
  33 static struct uci_package *uci_wireless;
  34 static struct blob_buf b;
  35
  36 static int
  37 config_section_idx(struct uci_section *s)
  38 {
  39         struct uci_element *e;
  40         int idx = 0;
  41
  42         uci_foreach_element(&uci_wireless->sections, e) {
  43                 struct uci_section *cur = uci_to_section(e);
  44
  45                 if (s == cur)
  46                         return idx;
  47
  48                 if (!strcmp(cur->type, s->type))
  49                         idx++;
  50         }
  51
  52         return -1;
  53 }
  54
  55 static int
  56 config_parse_bridge_interface(struct uci_section *s, struct device_type *devtype)
  57 {
  58         char *name;
  59
  60         name = alloca(strlen(s->e.name) + strlen(devtype->name_prefix) + 2);
  61         sprintf(name, "%s-%s", devtype->name_prefix, s->e.name);
  62         blobmsg_add_string(&b, "name", name);
  63
  64         uci_to_blob(&b, s, devtype->config_params);
  65         if (!device_create(name, devtype, b.head)) {
  66                 D(INTERFACE, "Failed to create '%s' device for interface '%s'\n",
  67                         devtype->name, s->e.name);
  68         }
  69
  70         blob_buf_init(&b, 0);
  71         blobmsg_add_string(&b, "ifname", name);
  72         return 0;
  73 }
  74
  75 static void
  76 config_parse_interface(struct uci_section *s, bool alias)
  77 {
  78         struct interface *iface;
  79         const char *type = NULL, *disabled;
  80         struct blob_attr *config;
  81         bool bridge = false;
  82         struct device_type *devtype = NULL;
  83
  84         disabled = uci_lookup_option_string(uci_ctx, s, "disabled");
  85         if (disabled && !strcmp(disabled, "1"))
  86                 return;
  87
  88         blob_buf_init(&b, 0);
  89
  90         if (!alias)
  91                 type = uci_lookup_option_string(uci_ctx, s, "type");
  92
  93         if (type)
  94                 devtype = device_type_get(type);
  95
  96         if (devtype && devtype->bridge_capability) {
  97                 if (config_parse_bridge_interface(s, devtype))
  98                         return;
  99
 100                 bridge = true;
 101         }
 102
 103         uci_to_blob(&b, s, &interface_attr_list);
 104
 105         iface = interface_alloc(s->e.name, b.head, false);
 106         if (!iface)
 107                 return;
 108
 109         if (iface->proto_handler && iface->proto_handler->config_params)
 110                 uci_to_blob(&b, s, iface->proto_handler->config_params);
 111
 112         if (!bridge && uci_to_blob(&b, s, simple_device_type.config_params))
 113                 iface->device_config = true;
 114
 115         config = blob_memdup(b.head);
 116         if (!config)
 117                 goto error;
 118
 119         if (alias) {
 120                 if (!interface_add_alias(iface, config))
 121                         goto error_free_config;
 122         } else {
 123                 if (!interface_add(iface, config))
 124                         goto error_free_config;
 125         }
 126         return;
 127
 128 error_free_config:
 129         free(config);
 130 error:
 131         free(iface);
 132 }
 133
 134 static void
 135 config_parse_route(struct uci_section *s, bool v6)
 136 {
 137         void *route;
 138
 139         blob_buf_init(&b, 0);
 140         route = blobmsg_open_array(&b, "route");
 141         uci_to_blob(&b, s, &route_attr_list);
 142         blobmsg_close_array(&b, route);
 143         interface_ip_add_route(NULL, blob_data(b.head), v6);
 144 }
 145
 146 static void
 147 config_parse_neighbor(struct uci_section *s, bool v6)
 148 {
 149         void *neighbor;
 150         blob_buf_init(&b,0);
 151         neighbor = blobmsg_open_array(&b, "neighbor");
 152         uci_to_blob(&b,s, &neighbor_attr_list);
 153         blobmsg_close_array(&b, neighbor);
 154         interface_ip_add_neighbor(NULL, blob_data(b.head), v6);
 155 }
 156
 157 static void
 158 config_parse_rule(struct uci_section *s, bool v6)
 159 {
 160         void *rule;
 161
 162         blob_buf_init(&b, 0);
 163         rule = blobmsg_open_array(&b, "rule");
 164         uci_to_blob(&b, s, &rule_attr_list);
 165         blobmsg_close_array(&b, rule);
 166         iprule_add(blob_data(b.head), v6);
 167 }
 168
 169 static void
 170 config_init_devices(void)
 171 {
 172         struct uci_element *e;
 173
 174         uci_foreach_element(&uci_network->sections, e) {
 175                 const struct uci_blob_param_list *params = NULL;
 176                 struct uci_section *s = uci_to_section(e);
 177                 struct device_type *devtype = NULL;
 178                 struct device *dev;
 179                 const char *type, *name;
 180
 181                 if (strcmp(s->type, "device") != 0)
 182                         continue;
 183
 184                 name = uci_lookup_option_string(uci_ctx, s, "name");
 185                 if (!name)
 186                         continue;
 187
 188                 type = uci_lookup_option_string(uci_ctx, s, "type");
 189                 if (type)
 190                         devtype = device_type_get(type);
 191
 192                 if (devtype)
 193                         params = devtype->config_params;
 194                 if (!params)
 195                         params = simple_device_type.config_params;
 196
 197                 blob_buf_init(&b, 0);
 198                 uci_to_blob(&b, s, params);
 199                 if (devtype) {
 200                         dev = device_create(name, devtype, b.head);
 201                         if (!dev)
 202                                 continue;
 203                 } else {
 204                         dev = device_get(name, 1);
 205                         if (!dev)
 206                                 continue;
 207
 208                         dev->current_config = true;
 209                         device_apply_config(dev, dev->type, b.head);
 210                 }
 211                 dev->default_config = false;
 212         }
 213 }
 214
 215 static void
 216 config_parse_vlan(struct device *dev, struct uci_section *s)
 217 {
 218         enum {
 219                 BRVLAN_ATTR_VID,
 220                 BRVLAN_ATTR_LOCAL,
 221                 BRVLAN_ATTR_PORTS,
 222                 __BRVLAN_ATTR_MAX,
 223         };
 224         static const struct blobmsg_policy vlan_attrs[__BRVLAN_ATTR_MAX] = {
 225                 [BRVLAN_ATTR_VID] = { "vlan", BLOBMSG_TYPE_INT32 },
 226                 [BRVLAN_ATTR_LOCAL] = { "local", BLOBMSG_TYPE_BOOL },
 227                 [BRVLAN_ATTR_PORTS] = { "ports", BLOBMSG_TYPE_ARRAY },
 228         };
 229         static const struct uci_blob_param_info vlan_attr_info[__BRVLAN_ATTR_MAX] = {
 230                 [BRVLAN_ATTR_PORTS] = { .type = BLOBMSG_TYPE_STRING },
 231         };
 232         static const struct uci_blob_param_list vlan_attr_list = {
 233                 .n_params = __BRVLAN_ATTR_MAX,
 234                 .params = vlan_attrs,
 235                 .info = vlan_attr_info,
 236         };
 237         struct blob_attr *tb[__BRVLAN_ATTR_MAX];
 238         struct blob_attr *cur;
 239         struct bridge_vlan_port *port;
 240         struct bridge_vlan *vlan;
 241         unsigned int vid;
 242         const char *val;
 243         char *name_buf;
 244         int name_len = 0;
 245         int n_ports = 0;
 246         int rem;
 247
 248         val = uci_lookup_option_string(uci_ctx, s, "vlan");
 249         if (!val)
 250                 return;
 251
 252         blob_buf_init(&b, 0);
 253         uci_to_blob(&b, s, &vlan_attr_list);
 254         blobmsg_parse(vlan_attrs, __BRVLAN_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 255
 256         if (!tb[BRVLAN_ATTR_VID])
 257                 return;
 258
 259         vid = blobmsg_get_u32(tb[BRVLAN_ATTR_VID]);
 260         if (!vid || vid > 4095)
 261                 return;
 262
 263         blobmsg_for_each_attr(cur, tb[BRVLAN_ATTR_PORTS], rem) {
 264                 name_len += strlen(blobmsg_get_string(cur)) + 1;
 265                 n_ports++;
 266         }
 267
 268         vlan = calloc(1, sizeof(*vlan) + n_ports * sizeof(*port) + name_len);
 269         if (!vlan)
 270                 return;
 271
 272         vlan->vid = vid;
 273         vlan->local = true;
 274         if (tb[BRVLAN_ATTR_LOCAL])
 275                 vlan->local = blobmsg_get_bool(tb[BRVLAN_ATTR_LOCAL]);
 276
 277         vlan->n_ports = n_ports;
 278         vlan->ports = port = (struct bridge_vlan_port *)&vlan[1];
 279         name_buf = (char *)&port[n_ports];
 280
 281         blobmsg_for_each_attr(cur, tb[BRVLAN_ATTR_PORTS], rem) {
 282                 char *sep;
 283
 284                 port->ifname = name_buf;
 285                 port->flags = BRVLAN_F_UNTAGGED;
 286                 strcpy(name_buf, blobmsg_get_string(cur));
 287
 288                 sep = strchr(name_buf, ':');
 289                 if (sep) {
 290                         for (*sep = 0, sep++; *sep; sep++)
 291                                 switch (*sep) {
 292                                 case '*':
 293                                         port->flags |= BRVLAN_F_PVID;
 294                                         break;
 295                                 case 't':
 296                                         port->flags &= ~BRVLAN_F_UNTAGGED;
 297                                         break;
 298                                 }
 299                 }
 300
 301                 name_buf += strlen(name_buf) + 1;
 302                 port++;
 303         }
 304
 305         vlist_add(&dev->vlans, &vlan->node, &vlan->vid);
 306 }
 307
 308
 309 static void
 310 config_init_vlans(void)
 311 {
 312         struct uci_element *e;
 313         struct device *dev;
 314
 315         device_vlan_update(false);
 316         uci_foreach_element(&uci_network->sections, e) {
 317                 struct uci_section *s = uci_to_section(e);
 318                 const char *name;
 319
 320                 if (strcmp(s->type, "bridge-vlan") != 0)
 321                         continue;
 322
 323                 name = uci_lookup_option_string(uci_ctx, s, "device");
 324                 if (!name)
 325                         continue;
 326
 327                 dev = device_get(name, 0);
 328                 if (!dev || !dev->vlans.update)
 329                         continue;
 330
 331                 config_parse_vlan(dev, s);
 332         }
 333         device_vlan_update(true);
 334 }
 335
 336 static struct uci_package *
 337 config_init_package(const char *config)
 338 {
 339         struct uci_context *ctx = uci_ctx;
 340         struct uci_package *p = NULL;
 341
 342         if (!ctx) {
 343                 ctx = uci_alloc_context();
 344                 uci_ctx = ctx;
 345
 346                 ctx->flags &= ~UCI_FLAG_STRICT;
 347                 if (config_path)
 348                         uci_set_confdir(ctx, config_path);
 349
 350 #ifdef DUMMY_MODE
 351                 uci_set_savedir(ctx, "./tmp");
 352 #endif
 353         } else {
 354                 p = uci_lookup_package(ctx, config);
 355                 if (p)
 356                         uci_unload(ctx, p);
 357         }
 358
 359         if (uci_load(ctx, config, &p))
 360                 return NULL;
 361
 362         return p;
 363 }
 364
 365 static void
 366 config_init_interfaces(void)
 367 {
 368         struct uci_element *e;
 369
 370         uci_foreach_element(&uci_network->sections, e) {
 371                 struct uci_section *s = uci_to_section(e);
 372
 373                 if (!strcmp(s->type, "interface"))
 374                         config_parse_interface(s, false);
 375         }
 376
 377         uci_foreach_element(&uci_network->sections, e) {
 378                 struct uci_section *s = uci_to_section(e);
 379
 380                 if (!strcmp(s->type, "alias"))
 381                         config_parse_interface(s, true);
 382         }
 383 }
 384
 385 static void
 386 config_init_ip(void)
 387 {
 388         struct interface *iface;
 389         struct uci_element *e;
 390
 391         vlist_for_each_element(&interfaces, iface, node)
 392                 interface_ip_update_start(&iface->config_ip);
 393
 394         uci_foreach_element(&uci_network->sections, e) {
 395                 struct uci_section *s = uci_to_section(e);
 396
 397                 if (!strcmp(s->type, "route"))
 398                         config_parse_route(s, false);
 399                 else if (!strcmp(s->type, "route6"))
 400                         config_parse_route(s, true);
 401                 if (!strcmp(s->type, "neighbor"))
 402                         config_parse_neighbor(s, false);
 403                 else if (!strcmp(s->type, "neighbor6"))
 404                         config_parse_neighbor(s, true);
 405         }
 406
 407         vlist_for_each_element(&interfaces, iface, node)
 408                 interface_ip_update_complete(&iface->config_ip);
 409 }
 410
 411 static void
 412 config_init_rules(void)
 413 {
 414         struct uci_element *e;
 415
 416         iprule_update_start();
 417
 418         uci_foreach_element(&uci_network->sections, e) {
 419                 struct uci_section *s = uci_to_section(e);
 420
 421                 if (!strcmp(s->type, "rule"))
 422                         config_parse_rule(s, false);
 423                 else if (!strcmp(s->type, "rule6"))
 424                         config_parse_rule(s, true);
 425         }
 426
 427         iprule_update_complete();
 428 }
 429
 430 static void
 431 config_init_globals(void)
 432 {
 433         struct uci_section *globals = uci_lookup_section(
 434                         uci_ctx, uci_network, "globals");
 435         if (!globals)
 436                 return;
 437
 438         const char *ula_prefix = uci_lookup_option_string(
 439                         uci_ctx, globals, "ula_prefix");
 440         interface_ip_set_ula_prefix(ula_prefix);
 441 }
 442
 443 static void
 444 config_parse_wireless_device(struct uci_section *s)
 445 {
 446         struct wireless_driver *drv;
 447         const char *driver_name;
 448
 449         driver_name = uci_lookup_option_string(uci_ctx, s, "type");
 450         if (!driver_name)
 451                 return;
 452
 453         drv = avl_find_element(&wireless_drivers, driver_name, drv, node);
 454         if (!drv)
 455                 return;
 456
 457         blob_buf_init(&b, 0);
 458         uci_to_blob(&b, s, drv->device.config);
 459         wireless_device_create(drv, s->e.name, b.head);
 460 }
 461
 462 static struct wireless_interface*
 463 config_parse_wireless_interface(struct wireless_device *wdev, struct uci_section *s)
 464 {
 465         char *name;
 466
 467         name = alloca(strlen(s->type) + 16);
 468         sprintf(name, "@%s[%d]", s->type, config_section_idx(s));
 469
 470         blob_buf_init(&b, 0);
 471         uci_to_blob(&b, s, wdev->drv->interface.config);
 472         return wireless_interface_create(wdev, b.head, s->anonymous ? name : s->e.name);
 473 }
 474
 475 static void
 476 config_parse_wireless_vlan(struct wireless_device *wdev, char *vif, struct uci_section *s)
 477 {
 478         char *name;
 479
 480         name = alloca(strlen(s->type) + 16);
 481         sprintf(name, "@%s[%d]", s->type, config_section_idx(s));
 482
 483         blob_buf_init(&b, 0);
 484         uci_to_blob(&b, s, wdev->drv->vlan.config);
 485         wireless_vlan_create(wdev, vif, b.head, s->anonymous ? name : s->e.name);
 486 }
 487
 488 static void
 489 config_parse_wireless_station(struct wireless_device *wdev, char *vif, struct uci_section *s)
 490 {
 491         char *name;
 492
 493         name = alloca(strlen(s->type) + 16);
 494         sprintf(name, "@%s[%d]", s->type, config_section_idx(s));
 495
 496         blob_buf_init(&b, 0);
 497         uci_to_blob(&b, s, wdev->drv->station.config);
 498         wireless_station_create(wdev, vif, b.head, s->anonymous ? name : s->e.name);
 499 }
 500
 501 static void
 502 config_init_wireless(void)
 503 {
 504         struct wireless_device *wdev;
 505         struct uci_element *e;
 506         const char *dev_name;
 507
 508         if (!uci_wireless) {
 509                 DPRINTF("No wireless configuration found\n");
 510                 return;
 511         }
 512
 513         vlist_update(&wireless_devices);
 514
 515         uci_foreach_element(&uci_wireless->sections, e) {
 516                 struct uci_section *s = uci_to_section(e);
 517                 if (strcmp(s->type, "wifi-device") != 0)
 518                         continue;
 519
 520                 config_parse_wireless_device(s);
 521         }
 522
 523         vlist_flush(&wireless_devices);
 524
 525         vlist_for_each_element(&wireless_devices, wdev, node) {
 526                 wdev->vif_idx = 0;
 527                 vlist_update(&wdev->interfaces);
 528                 wdev->vlan_idx = 0;
 529                 vlist_update(&wdev->vlans);
 530                 wdev->sta_idx = 0;
 531                 vlist_update(&wdev->stations);
 532         }
 533
 534         uci_foreach_element(&uci_wireless->sections, e) {
 535                 struct uci_section *s = uci_to_section(e);
 536                 struct wireless_interface *vif;
 537                 struct uci_element *f;
 538
 539                 if (strcmp(s->type, "wifi-iface") != 0)
 540                         continue;
 541
 542                 dev_name = uci_lookup_option_string(uci_ctx, s, "device");
 543                 if (!dev_name)
 544                         continue;
 545
 546                 wdev = vlist_find(&wireless_devices, dev_name, wdev, node);
 547                 if (!wdev) {
 548                         DPRINTF("device %s not found!\n", dev_name);
 549                         continue;
 550                 }
 551
 552                 vif = config_parse_wireless_interface(wdev, s);
 553
 554                 if (!vif || s->anonymous)
 555                         continue;
 556                 uci_foreach_element(&uci_wireless->sections, f) {
 557                         struct uci_section *s = uci_to_section(f);
 558                         const char *vif_name;
 559
 560                         if (strcmp(s->type, "wifi-vlan") != 0)
 561                                 continue;
 562
 563                         vif_name = uci_lookup_option_string(uci_ctx, s, "iface");
 564                         if (vif_name && strcmp(e->name, vif_name))
 565                                 continue;
 566                         config_parse_wireless_vlan(wdev, vif->name, s);
 567                 }
 568
 569                 uci_foreach_element(&uci_wireless->sections, f) {
 570                         struct uci_section *s = uci_to_section(f);
 571                         const char *vif_name;
 572
 573                         if (strcmp(s->type, "wifi-station") != 0)
 574                                 continue;
 575
 576                         vif_name = uci_lookup_option_string(uci_ctx, s, "iface");
 577                         if (vif_name && strcmp(e->name, vif_name))
 578                                 continue;
 579                         config_parse_wireless_station(wdev, vif->name, s);
 580                 }
 581         }
 582
 583         vlist_for_each_element(&wireless_devices, wdev, node) {
 584                 vlist_flush(&wdev->interfaces);
 585                 vlist_flush(&wdev->vlans);
 586                 vlist_flush(&wdev->stations);
 587         }
 588 }
 589
 590 int
 591 config_init_all(void)
 592 {
 593         int ret = 0;
 594         char *err;
 595
 596         uci_network = config_init_package("network");
 597         if (!uci_network) {
 598                 uci_get_errorstr(uci_ctx, &err, NULL);
 599                 netifd_log_message(L_CRIT, "Failed to load network config (%s)\n", err);
 600                 free(err);
 601                 return -1;
 602         }
 603
 604         uci_wireless = config_init_package("wireless");
 605         if (!uci_wireless && uci_ctx->err != UCI_ERR_NOTFOUND) {
 606                 uci_get_errorstr(uci_ctx, &err, NULL);
 607                 netifd_log_message(L_CRIT, "Failed to load wireless config (%s)\n", err);
 608                 free(err);
 609                 ret = -1;
 610         }
 611
 612         vlist_update(&interfaces);
 613         config_init = true;
 614         device_lock();
 615
 616         device_reset_config();
 617         config_init_devices();
 618         config_init_interfaces();
 619         config_init_vlans();
 620         config_init_ip();
 621         config_init_rules();
 622         config_init_globals();
 623         config_init_wireless();
 624
 625         config_init = false;
 626         device_unlock();
 627
 628         device_reset_old();
 629         device_init_pending();
 630         vlist_flush(&interfaces);
 631         device_free_unused(NULL);
 632         interface_refresh_assignments(false);
 633         interface_start_pending();
 634         wireless_start_pending();
 635
 636         return ret;
 637 }