wireless.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2013 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
  15 /* The wireless configuration is projected on the following objects
  16  *
  17  * 1. wireless device
  18  * 2. wireless interface
  19  * 3. wireless vlan
  20  * 4. wireless station
  21  *
  22  * A wireless device is a phy or simplified a wireless card.
  23  * A wireless interface is a SSID on a phy.
  24  * A wireless vlan can be assigned to a wireless interface. A wireless interface can
  25  *   have multiple vlans.
  26  * A wireless station is a client connected to an wireless interface.
  27  */
  28
  29 #include <signal.h>
  30 #include "netifd.h"
  31 #include "wireless.h"
  32 #include "handler.h"
  33 #include "ubus.h"
  34
  35 #define WIRELESS_SETUP_RETRY    3
  36
  37 struct vlist_tree wireless_devices;
  38 struct avl_tree wireless_drivers;
  39 static struct blob_buf b;
  40 static int drv_fd;
  41 static LIST_HEAD(handlers);
  42 static bool handler_pending;
  43
  44 enum {
  45         WDEV_ATTR_DISABLED,
  46         WDEV_ATTR_RECONF,
  47         WDEV_ATTR_SERIALIZE,
  48         __WDEV_ATTR_MAX,
  49 };
  50
  51 static const struct blobmsg_policy wdev_policy[__WDEV_ATTR_MAX] = {
  52         [WDEV_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
  53         [WDEV_ATTR_RECONF] = { .name = "reconf", .type = BLOBMSG_TYPE_BOOL },
  54         [WDEV_ATTR_SERIALIZE] = { .name = "serialize", .type = BLOBMSG_TYPE_BOOL },
  55 };
  56
  57 static const struct uci_blob_param_list wdev_param = {
  58         .n_params = ARRAY_SIZE(wdev_policy),
  59         .params = wdev_policy,
  60 };
  61
  62 enum {
  63         VIF_ATTR_DISABLED,
  64         VIF_ATTR_NETWORK,
  65         VIF_ATTR_ISOLATE,
  66         VIF_ATTR_MODE,
  67         __VIF_ATTR_MAX,
  68 };
  69
  70 static const struct blobmsg_policy vif_policy[__VIF_ATTR_MAX] = {
  71         [VIF_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
  72         [VIF_ATTR_NETWORK] = { .name = "network", .type = BLOBMSG_TYPE_ARRAY },
  73         [VIF_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
  74         [VIF_ATTR_MODE] = { .name = "mode", .type = BLOBMSG_TYPE_STRING },
  75 };
  76
  77 static const struct uci_blob_param_list vif_param = {
  78         .n_params = ARRAY_SIZE(vif_policy),
  79         .params = vif_policy,
  80 };
  81
  82 enum {
  83         VLAN_ATTR_DISABLED,
  84         VLAN_ATTR_NETWORK,
  85         VLAN_ATTR_ISOLATE,
  86         __VLAN_ATTR_MAX,
  87 };
  88
  89 static const struct blobmsg_policy vlan_policy[__VLAN_ATTR_MAX] = {
  90         [VLAN_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
  91         [VLAN_ATTR_NETWORK] = { .name = "network", .type = BLOBMSG_TYPE_ARRAY },
  92         [VLAN_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
  93 };
  94
  95 static const struct uci_blob_param_list vlan_param = {
  96         .n_params = ARRAY_SIZE(vlan_policy),
  97         .params = vlan_policy,
  98 };
  99
 100 enum {
 101         STA_ATTR_DISABLED,
 102         __STA_ATTR_MAX,
 103 };
 104
 105 static const struct blobmsg_policy sta_policy[__STA_ATTR_MAX] = {
 106         [STA_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
 107 };
 108
 109 static const struct uci_blob_param_list station_param = {
 110         .n_params = ARRAY_SIZE(sta_policy),
 111         .params = sta_policy,
 112 };
 113
 114 static void
 115 wireless_handler_stop(struct wireless_device *wdev)
 116 {
 117         if (wdev->handler_pending) {
 118                 wdev->handler_pending = false;
 119                 list_del(&wdev->handler);
 120         }
 121 }
 122
 123 static void
 124 put_container(struct blob_buf *buf, struct blob_attr *attr, const char *name)
 125 {
 126         void *c = blobmsg_open_table(buf, name);
 127         blob_put_raw(buf, blob_data(attr), blob_len(attr));
 128         blobmsg_close_table(buf, c);
 129 }
 130
 131 static void
 132 vif_config_add_bridge(struct blob_buf *buf, struct blob_attr *networks, bool prepare)
 133 {
 134         struct interface *iface;
 135         struct device *dev = NULL, *orig_dev;
 136         struct blob_attr *cur;
 137         const char *network;
 138         int rem;
 139
 140         if (!networks)
 141                 return;
 142
 143         blobmsg_for_each_attr(cur, networks, rem) {
 144                 network = blobmsg_data(cur);
 145
 146                 iface = vlist_find(&interfaces, network, iface, node);
 147                 if (!iface)
 148                         continue;
 149
 150                 dev = iface->main_dev.dev;
 151                 if (!dev)
 152                         return;
 153
 154                 if (!dev->hotplug_ops)
 155                         return;
 156         }
 157
 158         if (!dev)
 159                 return;
 160
 161         orig_dev = dev;
 162         if (dev->hotplug_ops && dev->hotplug_ops->prepare)
 163                 dev->hotplug_ops->prepare(dev, &dev);
 164
 165         if (!dev || !dev->type->bridge_capability)
 166                 return;
 167
 168         blobmsg_add_string(buf, "bridge", dev->ifname);
 169         blobmsg_add_string(buf, "bridge-ifname", orig_dev->ifname);
 170
 171         if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
 172                 blobmsg_add_u8(buf, "multicast_to_unicast",
 173                                dev->settings.multicast_to_unicast);
 174 }
 175
 176 static void
 177 prepare_config(struct wireless_device *wdev, struct blob_buf *buf, bool up)
 178 {
 179         struct wireless_interface *vif;
 180         struct wireless_vlan *vlan;
 181         struct wireless_station *sta;
 182         void *l, *i, *j, *k;
 183
 184         blob_buf_init(&b, 0);
 185         put_container(&b, wdev->config, "config");
 186         if (wdev->data)
 187                 blobmsg_add_blob(&b, wdev->data);
 188
 189         l = blobmsg_open_table(&b, "interfaces");
 190         vlist_for_each_element(&wdev->interfaces, vif, node) {
 191                 i = blobmsg_open_table(&b, vif->name);
 192                 vif_config_add_bridge(&b, vif->network, up);
 193                 put_container(&b, vif->config, "config");
 194                 if (vif->data)
 195                         blobmsg_add_blob(&b, vif->data);
 196
 197                 j = blobmsg_open_table(&b, "vlans");
 198                 vlist_for_each_element(&wdev->vlans, vlan, node) {
 199                         if (strcmp(vlan->vif, vif->name))
 200                                 continue;
 201                         k = blobmsg_open_table(&b, vlan->name);
 202                         vif_config_add_bridge(&b, vlan->network, up);
 203                         put_container(&b, vlan->config, "config");
 204                         if (vlan->data)
 205                                 blobmsg_add_blob(&b, vlan->data);
 206                         blobmsg_close_table(&b, k);
 207                 }
 208                 blobmsg_close_table(&b, j);
 209
 210                 j = blobmsg_open_table(&b, "stas");
 211                 vlist_for_each_element(&wdev->stations, sta, node) {
 212                         if (strcmp(sta->vif, vif->name))
 213                                 continue;
 214                         k = blobmsg_open_table(&b, sta->name);
 215                         put_container(&b, sta->config, "config");
 216                         if (sta->data)
 217                                 blobmsg_add_blob(&b, sta->data);
 218                         blobmsg_close_table(&b, k);
 219                 }
 220                 blobmsg_close_table(&b, j);
 221                 blobmsg_close_table(&b, i);
 222         }
 223         blobmsg_close_table(&b, l);
 224
 225 }
 226
 227 static bool
 228 wireless_process_check(struct wireless_process *proc)
 229 {
 230         return check_pid_path(proc->pid, proc->exe);
 231 }
 232
 233 static void
 234 wireless_complete_kill_request(struct wireless_device *wdev)
 235 {
 236         if (!wdev->kill_request)
 237                 return;
 238
 239         ubus_complete_deferred_request(ubus_ctx, wdev->kill_request, 0);
 240         free(wdev->kill_request);
 241         wdev->kill_request = NULL;
 242 }
 243
 244 static void
 245 wireless_process_free(struct wireless_device *wdev, struct wireless_process *proc)
 246 {
 247         D(WIRELESS, "Wireless device '%s' free pid %d\n", wdev->name, proc->pid);
 248         list_del(&proc->list);
 249         free(proc);
 250
 251         if (list_empty(&wdev->script_proc))
 252                 wireless_complete_kill_request(wdev);
 253 }
 254
 255 static void
 256 wireless_close_script_proc_fd(struct wireless_device *wdev)
 257 {
 258         if (wdev->script_proc_fd.fd < 0)
 259                 return;
 260
 261         uloop_fd_delete(&wdev->script_proc_fd);
 262         close(wdev->script_proc_fd.fd);
 263         wdev->script_proc_fd.fd = -1;
 264 }
 265
 266 static void
 267 wireless_process_kill_all(struct wireless_device *wdev, int signal, bool free)
 268 {
 269         struct wireless_process *proc, *tmp;
 270
 271         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 272                 bool check = wireless_process_check(proc);
 273
 274                 if (check && !proc->keep) {
 275                         D(WIRELESS, "Wireless device '%s' kill pid %d\n", wdev->name, proc->pid);
 276                         kill(proc->pid, signal);
 277                 }
 278
 279                 if (free || !check)
 280                         wireless_process_free(wdev, proc);
 281         }
 282
 283         if (free)
 284                 wireless_close_script_proc_fd(wdev);
 285 }
 286
 287 static void
 288 wireless_device_free_state(struct wireless_device *wdev)
 289 {
 290         struct wireless_interface *vif;
 291         struct wireless_vlan *vlan;
 292         struct wireless_station *sta;
 293
 294         wireless_handler_stop(wdev);
 295         uloop_timeout_cancel(&wdev->script_check);
 296         uloop_timeout_cancel(&wdev->timeout);
 297         wireless_complete_kill_request(wdev);
 298         free(wdev->data);
 299         wdev->data = NULL;
 300         vlist_for_each_element(&wdev->interfaces, vif, node) {
 301                 free(vif->data);
 302                 vif->data = NULL;
 303                 vif->ifname = NULL;
 304         }
 305         vlist_for_each_element(&wdev->vlans, vlan, node) {
 306                 free(vlan->data);
 307                 vlan->data = NULL;
 308                 vlan->ifname = NULL;
 309         }
 310         vlist_for_each_element(&wdev->stations, sta, node) {
 311                 free(sta->data);
 312                 sta->data = NULL;
 313         }
 314 }
 315
 316 static void wireless_interface_handle_link(struct wireless_interface *vif, bool up)
 317 {
 318         struct interface *iface;
 319         struct blob_attr *cur;
 320         const char *network;
 321         int rem;
 322
 323         if (!vif->network || !vif->ifname)
 324                 return;
 325
 326         if (up) {
 327                 struct device *dev = device_get(vif->ifname, 2);
 328                 if (dev) {
 329                         dev->wireless_isolate = vif->isolate;
 330                         dev->wireless = true;
 331                         dev->wireless_ap = vif->ap_mode;
 332                 }
 333         }
 334
 335         blobmsg_for_each_attr(cur, vif->network, rem) {
 336                 network = blobmsg_data(cur);
 337
 338                 iface = vlist_find(&interfaces, network, iface, node);
 339                 if (!iface)
 340                         continue;
 341
 342                 interface_handle_link(iface, vif->ifname, NULL, up, true);
 343         }
 344 }
 345
 346 static void wireless_vlan_handle_link(struct wireless_vlan *vlan, bool up)
 347 {
 348         struct interface *iface;
 349         struct blob_attr *cur;
 350         const char *network;
 351         int rem;
 352
 353         if (!vlan->network || !vlan->ifname)
 354                 return;
 355
 356         if (up) {
 357                 struct device *dev = device_get(vlan->ifname, 2);
 358                 if (dev) {
 359                         dev->wireless_isolate = vlan->isolate;
 360                         dev->wireless = true;
 361                         dev->wireless_ap = true;
 362                 }
 363         }
 364
 365         blobmsg_for_each_attr(cur, vlan->network, rem) {
 366                 network = blobmsg_data(cur);
 367
 368                 iface = vlist_find(&interfaces, network, iface, node);
 369                 if (!iface)
 370                         continue;
 371
 372                 interface_handle_link(iface, vlan->ifname, NULL, up, true);
 373         }
 374 }
 375
 376 static void
 377 wireless_device_setup_cancel(struct wireless_device *wdev)
 378 {
 379         if (wdev->cancel)
 380                 return;
 381
 382         wireless_handler_stop(wdev);
 383         D(WIRELESS, "Cancel wireless device '%s' setup\n", wdev->name);
 384         wdev->cancel = true;
 385         uloop_timeout_set(&wdev->timeout, 10 * 1000);
 386 }
 387
 388 static void
 389 wireless_device_run_handler(struct wireless_device *wdev, bool up)
 390 {
 391         const char *action = up ? "setup" : "teardown";
 392         const char *argv[6];
 393         char *config;
 394         int i = 0;
 395         int fds[2] = { -1, -1 };
 396
 397         wireless_handler_stop(wdev);
 398
 399         if (handler_pending && wdev->serialize) {
 400                 wdev->handler_action = up;
 401                 wdev->handler_pending = true;
 402                 list_add_tail(&wdev->handler, &handlers);
 403                 return;
 404         }
 405         if (wdev->serialize)
 406                 handler_pending = true;
 407
 408         D(WIRELESS, "Wireless device '%s' run %s handler\n", wdev->name, action);
 409         if (!up && wdev->prev_config) {
 410                 config = blobmsg_format_json(wdev->prev_config, true);
 411                 free(wdev->prev_config);
 412                 wdev->prev_config = NULL;
 413         } else {
 414                 prepare_config(wdev, &b, up);
 415                 config = blobmsg_format_json(b.head, true);
 416         }
 417
 418         argv[i++] = wdev->drv->script;
 419         argv[i++] = wdev->drv->name;
 420         argv[i++] = action;
 421         argv[i++] = wdev->name;
 422         argv[i++] = config;
 423         argv[i] = NULL;
 424
 425         if (up && pipe(fds) == 0) {
 426                 wdev->script_proc_fd.fd = fds[0];
 427                 uloop_fd_add(&wdev->script_proc_fd,
 428                              ULOOP_READ | ULOOP_EDGE_TRIGGER);
 429         }
 430
 431         netifd_start_process(argv, NULL, &wdev->script_task);
 432
 433         if (fds[1] >= 0)
 434                 close(fds[1]);
 435
 436         free(config);
 437 }
 438
 439 static void
 440 wireless_handler_next(void)
 441 {
 442         struct wireless_device *wdev;
 443
 444         if (handler_pending)
 445                 return;
 446         if (list_empty(&handlers))
 447                 return;
 448         wdev = list_first_entry(&handlers, struct wireless_device, handler);
 449         list_del(&wdev->handler);
 450         wdev->handler_pending = false;
 451         wireless_device_run_handler(wdev, wdev->handler_action);
 452 }
 453
 454 static void
 455 __wireless_device_set_up(struct wireless_device *wdev, int force)
 456 {
 457         if (wdev->disabled)
 458                 return;
 459
 460         if (wdev->retry_setup_failed)
 461                 return;
 462
 463         if (!wdev->autostart)
 464                 return;
 465
 466         if (!force && (wdev->state != IFS_DOWN || config_init))
 467                 return;
 468
 469         free(wdev->prev_config);
 470         wdev->prev_config = NULL;
 471         wdev->state = IFS_SETUP;
 472         wireless_device_run_handler(wdev, true);
 473 }
 474
 475 static void
 476 wireless_device_free(struct wireless_device *wdev)
 477 {
 478         wireless_handler_stop(wdev);
 479         vlist_flush_all(&wdev->interfaces);
 480         vlist_flush_all(&wdev->vlans);
 481         vlist_flush_all(&wdev->stations);
 482         avl_delete(&wireless_devices.avl, &wdev->node.avl);
 483         free(wdev->config);
 484         free(wdev->prev_config);
 485         free(wdev);
 486 }
 487
 488 static void
 489 wdev_handle_config_change(struct wireless_device *wdev)
 490 {
 491         enum interface_config_state state = wdev->config_state;
 492
 493         switch(state) {
 494         case IFC_NORMAL:
 495         case IFC_RELOAD:
 496                 __wireless_device_set_up(wdev, 0);
 497
 498                 wdev->config_state = IFC_NORMAL;
 499                 break;
 500         case IFC_REMOVE:
 501                 wireless_device_free(wdev);
 502                 break;
 503         }
 504 }
 505
 506 static void
 507 wireless_device_mark_down(struct wireless_device *wdev)
 508 {
 509         struct wireless_interface *vif;
 510         struct wireless_vlan *vlan;
 511
 512         D(WIRELESS, "Wireless device '%s' is now down\n", wdev->name);
 513
 514         vlist_for_each_element(&wdev->vlans, vlan, node)
 515                 wireless_vlan_handle_link(vlan, false);
 516
 517         vlist_for_each_element(&wdev->interfaces, vif, node)
 518                 wireless_interface_handle_link(vif, false);
 519
 520         wireless_process_kill_all(wdev, SIGTERM, true);
 521
 522         wdev->cancel = false;
 523         wdev->state = IFS_DOWN;
 524         wireless_device_free_state(wdev);
 525         wdev_handle_config_change(wdev);
 526 }
 527
 528 /* timeout callback to protect the tear down */
 529 static void
 530 wireless_device_setup_timeout(struct uloop_timeout *timeout)
 531 {
 532         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 533
 534         if (wdev->handler_pending) {
 535                 wdev->handler_pending = false;
 536                 list_del(&wdev->handler);
 537         }
 538         netifd_kill_process(&wdev->script_task);
 539         wdev->script_task.cb(&wdev->script_task, -1);
 540         wireless_device_mark_down(wdev);
 541 }
 542
 543 void
 544 wireless_device_set_up(struct wireless_device *wdev)
 545 {
 546         wdev->retry = WIRELESS_SETUP_RETRY;
 547         wdev->autostart = true;
 548         __wireless_device_set_up(wdev, 0);
 549 }
 550
 551 void
 552 wireless_device_reconf(struct wireless_device *wdev)
 553 {
 554         wdev->retry = WIRELESS_SETUP_RETRY;
 555         wdev->autostart = true;
 556         __wireless_device_set_up(wdev, wdev->reconf && (wdev->state == IFS_UP));
 557 }
 558
 559 static void
 560 __wireless_device_set_down(struct wireless_device *wdev)
 561 {
 562         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 563                 return;
 564
 565         if (wdev->script_task.uloop.pending) {
 566                 wireless_device_setup_cancel(wdev);
 567                 return;
 568         }
 569
 570         wdev->state = IFS_TEARDOWN;
 571         wireless_device_run_handler(wdev, false);
 572 }
 573
 574 /* ubus callback network.wireless.notify, command = up */
 575 static void
 576 wireless_device_mark_up(struct wireless_device *wdev)
 577 {
 578         struct wireless_interface *vif;
 579         struct wireless_vlan *vlan;
 580
 581         if (wdev->cancel) {
 582                 wdev->cancel = false;
 583                 __wireless_device_set_down(wdev);
 584                 return;
 585         }
 586
 587         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 588         wdev->state = IFS_UP;
 589         vlist_for_each_element(&wdev->interfaces, vif, node)
 590                 wireless_interface_handle_link(vif, true);
 591         vlist_for_each_element(&wdev->vlans, vlan, node)
 592                 wireless_vlan_handle_link(vlan, true);
 593 }
 594
 595 static void
 596 wireless_device_retry_setup(struct wireless_device *wdev)
 597 {
 598         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN || wdev->cancel)
 599                 return;
 600
 601         if (--wdev->retry < 0)
 602                 wdev->retry_setup_failed = true;
 603
 604         __wireless_device_set_down(wdev);
 605 }
 606
 607 static void
 608 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 609 {
 610         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 611
 612         switch (wdev->state) {
 613         case IFS_SETUP:
 614                 wireless_device_retry_setup(wdev);
 615                 break;
 616         case IFS_TEARDOWN:
 617                 wireless_device_mark_down(wdev);
 618                 break;
 619         default:
 620                 break;
 621         }
 622
 623         if (wdev->serialize) {
 624                 handler_pending = false;
 625                 wireless_handler_next();
 626         }
 627 }
 628
 629 void
 630 wireless_device_set_down(struct wireless_device *wdev)
 631 {
 632         wdev->retry_setup_failed = false;
 633         wdev->autostart = false;
 634         __wireless_device_set_down(wdev);
 635 }
 636
 637 static void
 638 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 639 {
 640         if (wdev->config_state != IFC_NORMAL)
 641                 return;
 642
 643         wdev->config_state = s;
 644         if (wdev->state == IFS_DOWN)
 645                 wdev_handle_config_change(wdev);
 646         else if (!wdev->reconf || wdev->state != IFS_UP)
 647                 __wireless_device_set_down(wdev);
 648 }
 649
 650 static void
 651 wdev_prepare_prev_config(struct wireless_device *wdev)
 652 {
 653         if (wdev->prev_config)
 654                 return;
 655
 656         prepare_config(wdev, &b, false);
 657         wdev->prev_config = blob_memdup(b.head);
 658 }
 659
 660 static void
 661 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 662 {
 663         struct blob_attr *new_config = wd_new->config;
 664         bool disabled = wd_new->disabled;
 665
 666         free(wd_new);
 667
 668         wdev_prepare_prev_config(wdev);
 669         if (blob_attr_equal(wdev->config, new_config) && wdev->disabled == disabled)
 670                 return;
 671
 672         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 673         free(wdev->config);
 674         wdev->config = blob_memdup(new_config);
 675         wdev->disabled = disabled;
 676         wdev->retry_setup_failed = false;
 677         wdev_set_config_state(wdev, IFC_RELOAD);
 678 }
 679
 680 static void
 681 wdev_create(struct wireless_device *wdev)
 682 {
 683         wdev->retry = WIRELESS_SETUP_RETRY;
 684         wdev->config = blob_memdup(wdev->config);
 685 }
 686
 687 /* vlist update call for wireless device list */
 688 static void
 689 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 690             struct vlist_node *node_old)
 691 {
 692         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 693         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 694
 695         if (wd_old && wd_new) {
 696                 D(WIRELESS, "Update wireless device '%s'\n", wd_old->name);
 697                 wdev_change_config(wd_old, wd_new);
 698         } else if (wd_old) {
 699                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 700                 wdev_set_config_state(wd_old, IFC_REMOVE);
 701         } else if (wd_new) {
 702                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 703                 wdev_create(wd_new);
 704         }
 705 }
 706
 707 /* wireless netifd script handler */
 708 static void
 709 wireless_add_handler(const char *script, const char *name, json_object *obj)
 710 {
 711         struct wireless_driver *drv;
 712         char *name_str, *script_str;
 713         json_object *dev_config_obj, *iface_config_obj, *vlan_config_obj, *station_config_obj;
 714         struct uci_blob_param_list *dev_config, *iface_config, *vlan_config, *station_config;
 715
 716         dev_config_obj = json_get_field(obj, "device", json_type_array);
 717         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 718         vlan_config_obj = json_get_field(obj, "vlan", json_type_array);
 719         station_config_obj = json_get_field(obj, "station", json_type_array);
 720
 721         if (!dev_config_obj || !iface_config_obj || !vlan_config_obj || !station_config_obj)
 722                 return;
 723
 724         drv = calloc_a(sizeof(*drv),
 725                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 726                 &iface_config, sizeof(*iface_config) + sizeof(void *),
 727                 &vlan_config, sizeof(*vlan_config) + sizeof(void *),
 728                 &station_config, sizeof(*station_config) + sizeof(void *),
 729                 &name_str, strlen(name) + 1,
 730                 &script_str, strlen(script) + 1);
 731
 732         drv->name = strcpy(name_str, name);
 733         drv->script = strcpy(script_str, script);
 734
 735         dev_config->n_next = 1;
 736         dev_config->next[0] = &wdev_param;
 737         drv->device.config = dev_config;
 738
 739         iface_config->n_next = 1;
 740         iface_config->next[0] = &vif_param;
 741         drv->interface.config = iface_config;
 742
 743         vlan_config->n_next = 1;
 744         vlan_config->next[0] = &vlan_param;
 745         drv->vlan.config = vlan_config;
 746
 747         station_config->n_next = 1;
 748         station_config->next[0] = &station_param;
 749         drv->station.config = station_config;
 750
 751         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 752         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 753         drv->vlan.buf = netifd_handler_parse_config(drv->vlan.config, vlan_config_obj);
 754         drv->station.buf = netifd_handler_parse_config(drv->station.config, station_config_obj);
 755
 756         drv->node.key = drv->name;
 757         avl_insert(&wireless_drivers, &drv->node);
 758         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 759 }
 760
 761 void wireless_init(void)
 762 {
 763         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 764         wireless_devices.keep_old = true;
 765         wireless_devices.no_delete = true;
 766
 767         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 768         drv_fd = netifd_open_subdir("wireless");
 769         if (drv_fd < 0)
 770                 return;
 771
 772         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 773 }
 774
 775 /* parse blob config into the wireless interface object */
 776 static void
 777 wireless_interface_init_config(struct wireless_interface *vif)
 778 {
 779         struct blob_attr *tb[__VIF_ATTR_MAX];
 780         struct blob_attr *cur;
 781
 782         vif->network = NULL;
 783         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 784
 785         if ((cur = tb[VIF_ATTR_NETWORK]))
 786                 vif->network = cur;
 787
 788         cur = tb[VIF_ATTR_ISOLATE];
 789         if (cur)
 790                 vif->isolate = blobmsg_get_bool(cur);
 791
 792         cur = tb[VIF_ATTR_MODE];
 793         if (cur)
 794                 vif->ap_mode = !strcmp(blobmsg_get_string(cur), "ap");
 795 }
 796
 797 /* vlist update call for wireless interface list */
 798 static void
 799 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 800            struct vlist_node *node_old)
 801 {
 802         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 803         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 804         struct wireless_device *wdev;
 805
 806         if (vif_old)
 807                 wdev = vif_old->wdev;
 808         else
 809                 wdev = vif_new->wdev;
 810
 811         if (vif_old && vif_new) {
 812                 free((void *) vif_old->section);
 813                 vif_old->section = strdup(vif_new->section);
 814                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 815                         free(vif_new);
 816                         return;
 817                 }
 818
 819                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 820                 wireless_interface_handle_link(vif_old, false);
 821                 free(vif_old->config);
 822                 vif_old->config = blob_memdup(vif_new->config);
 823                 vif_old->isolate = vif_new->isolate;
 824                 vif_old->ap_mode = vif_new->ap_mode;
 825                 wireless_interface_init_config(vif_old);
 826                 free(vif_new);
 827         } else if (vif_new) {
 828                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 829                 vif_new->section = strdup(vif_new->section);
 830                 vif_new->config = blob_memdup(vif_new->config);
 831                 wireless_interface_init_config(vif_new);
 832         } else if (vif_old) {
 833                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 834                 wireless_interface_handle_link(vif_old, false);
 835                 free((void *) vif_old->section);
 836                 free(vif_old->config);
 837                 free(vif_old);
 838         }
 839
 840         wdev_set_config_state(wdev, IFC_RELOAD);
 841 }
 842
 843 /* parse blob config into the vlan object */
 844 static void
 845 wireless_vlan_init_config(struct wireless_vlan *vlan)
 846 {
 847         struct blob_attr *tb[__VLAN_ATTR_MAX];
 848         struct blob_attr *cur;
 849
 850         vlan->network = NULL;
 851         blobmsg_parse(vlan_policy, __VLAN_ATTR_MAX, tb, blob_data(vlan->config), blob_len(vlan->config));
 852
 853         if ((cur = tb[VLAN_ATTR_NETWORK]))
 854                 vlan->network = cur;
 855
 856         cur = tb[VLAN_ATTR_ISOLATE];
 857         if (cur)
 858                 vlan->isolate = blobmsg_get_bool(cur);
 859 }
 860
 861 /* vlist update call for vlan list */
 862 static void
 863 vlan_update(struct vlist_tree *tree, struct vlist_node *node_new,
 864             struct vlist_node *node_old)
 865 {
 866         struct wireless_vlan *vlan_old = container_of(node_old, struct wireless_vlan, node);
 867         struct wireless_vlan *vlan_new = container_of(node_new, struct wireless_vlan, node);
 868         struct wireless_device *wdev;
 869
 870         if (vlan_old)
 871                 wdev = vlan_old->wdev;
 872         else
 873                 wdev = vlan_new->wdev;
 874
 875         if (vlan_old && vlan_new) {
 876                 free((void *) vlan_old->section);
 877                 vlan_old->section = strdup(vlan_new->section);
 878                 if (blob_attr_equal(vlan_old->config, vlan_new->config)) {
 879                         free(vlan_new);
 880                         return;
 881                 }
 882
 883                 D(WIRELESS, "Update wireless vlan %s on device %s\n", vlan_new->name, wdev->name);
 884                 wireless_vlan_handle_link(vlan_old, false);
 885                 free(vlan_old->config);
 886                 vlan_old->config = blob_memdup(vlan_new->config);
 887                 vlan_old->isolate = vlan_new->isolate;
 888                 wireless_vlan_init_config(vlan_old);
 889                 free(vlan_new);
 890         } else if (vlan_new) {
 891                 D(WIRELESS, "Create new wireless vlan %s on device %s\n", vlan_new->name, wdev->name);
 892                 vlan_new->section = strdup(vlan_new->section);
 893                 vlan_new->config = blob_memdup(vlan_new->config);
 894                 wireless_vlan_init_config(vlan_new);
 895         } else if (vlan_old) {
 896                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vlan_old->name, wdev->name);
 897                 wireless_vlan_handle_link(vlan_old, false);
 898                 free((void *) vlan_old->section);
 899                 free(vlan_old->config);
 900                 free(vlan_old);
 901         }
 902
 903         wdev_set_config_state(wdev, IFC_RELOAD);
 904 }
 905
 906 /* vlist update call for station list */
 907 static void
 908 station_update(struct vlist_tree *tree, struct vlist_node *node_new,
 909                struct vlist_node *node_old)
 910 {
 911         struct wireless_station *sta_old = container_of(node_old, struct wireless_station, node);
 912         struct wireless_station *sta_new = container_of(node_new, struct wireless_station, node);
 913         struct wireless_device *wdev;
 914
 915         if (sta_old)
 916                 wdev = sta_old->wdev;
 917         else
 918                 wdev = sta_new->wdev;
 919
 920         if (sta_old && sta_new) {
 921                 free((void *) sta_old->section);
 922                 sta_old->section = strdup(sta_new->section);
 923                 if (blob_attr_equal(sta_old->config, sta_new->config)) {
 924                         free(sta_new);
 925                         return;
 926                 }
 927
 928                 D(WIRELESS, "Update wireless station %s on device %s\n", sta_new->name, wdev->name);
 929                 free(sta_old->config);
 930                 sta_old->config = blob_memdup(sta_new->config);
 931                 free(sta_new);
 932         } else if (sta_new) {
 933                 D(WIRELESS, "Create new wireless station %s on device %s\n", sta_new->name, wdev->name);
 934                 sta_new->section = strdup(sta_new->section);
 935                 sta_new->config = blob_memdup(sta_new->config);
 936         } else if (sta_old) {
 937                 D(WIRELESS, "Delete wireless station %s on device %s\n", sta_old->name, wdev->name);
 938                 free((void *) sta_old->section);
 939                 free(sta_old->config);
 940                 free(sta_old);
 941         }
 942
 943         wdev_set_config_state(wdev, IFC_RELOAD);
 944 }
 945
 946 static void
 947 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 948 {
 949         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 950         char buf[128];
 951
 952         while (1) {
 953                 int b = read(fd->fd, buf, sizeof(buf));
 954                 if (b < 0) {
 955                         if (errno == EINTR)
 956                                 continue;
 957
 958                         if (errno == EAGAIN)
 959                                 return;
 960
 961                         goto done;
 962                 }
 963
 964                 if (!b)
 965                         goto done;
 966         }
 967
 968 done:
 969         uloop_timeout_set(&wdev->script_check, 0);
 970         wireless_close_script_proc_fd(wdev);
 971 }
 972
 973 /* watchdog and garbage collector for wireless processes.
 974  * It cleans up terminated processes. If a process is a requirement for the wireless device, it retries the setup */
 975 static void
 976 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 977 {
 978         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 979         struct wireless_process *proc, *tmp;
 980         bool restart = false;
 981
 982         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 983                 if (wireless_process_check(proc))
 984                         continue;
 985
 986                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 987                 if (proc->required)
 988                         restart = true;
 989
 990                 wireless_process_free(wdev, proc);
 991         }
 992
 993         if (restart)
 994                 wireless_device_retry_setup(wdev);
 995         else
 996                 uloop_timeout_set(&wdev->script_check, 1000);
 997 }
 998
 999 /* creates a wireless device object. Called by config */
1000 void
1001 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
1002 {
1003         struct wireless_device *wdev;
1004         char *name_buf;
1005         struct blob_attr *tb[__WDEV_ATTR_MAX];
1006         struct blob_attr *cur;
1007
1008         blobmsg_parse(wdev_policy, __WDEV_ATTR_MAX, tb, blob_data(data), blob_len(data));
1009
1010         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
1011
1012         cur = tb[WDEV_ATTR_DISABLED];
1013         wdev->disabled = cur && blobmsg_get_bool(cur);
1014
1015         wdev->drv = drv;
1016         wdev->state = IFS_DOWN;
1017         wdev->config_state = IFC_NORMAL;
1018         wdev->name = strcpy(name_buf, name);
1019         wdev->config = data;
1020         wdev->handler_pending = false;
1021
1022         cur = tb[WDEV_ATTR_SERIALIZE];
1023         wdev->serialize = cur && blobmsg_get_bool(cur);
1024
1025         cur = tb[WDEV_ATTR_RECONF];
1026         wdev->reconf = cur && blobmsg_get_bool(cur);
1027
1028         wdev->retry_setup_failed = false;
1029         wdev->autostart = true;
1030         INIT_LIST_HEAD(&wdev->script_proc);
1031         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
1032         wdev->interfaces.keep_old = true;
1033         vlist_init(&wdev->vlans, avl_strcmp, vlan_update);
1034         wdev->vlans.keep_old = true;
1035         vlist_init(&wdev->stations, avl_strcmp, station_update);
1036         wdev->stations.keep_old = true;
1037
1038         wdev->timeout.cb = wireless_device_setup_timeout;
1039         wdev->script_task.cb = wireless_device_script_task_cb;
1040         wdev->script_task.dir_fd = drv_fd;
1041         wdev->script_task.log_prefix = wdev->name;
1042
1043         wdev->script_proc_fd.fd = -1;
1044         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
1045
1046         wdev->script_check.cb = wireless_device_check_script_tasks;
1047
1048         vlist_add(&wireless_devices, &wdev->node, wdev->name);
1049 }
1050
1051 /* creates a wireless station object. Called by config */
1052 void
1053 wireless_station_create(struct wireless_device *wdev, char *vif, struct blob_attr *data, const char *section)
1054 {
1055         struct wireless_station *sta;
1056         struct blob_attr *tb[__STA_ATTR_MAX];
1057         struct blob_attr *cur;
1058         char *name_buf, *vif_buf;
1059         char name[8];
1060
1061         blobmsg_parse(sta_policy, __STA_ATTR_MAX, tb, blob_data(data), blob_len(data));
1062
1063         cur = tb[STA_ATTR_DISABLED];
1064         if (cur && blobmsg_get_bool(cur))
1065                 return;
1066
1067         sprintf(name, "%d", wdev->vlan_idx++);
1068
1069         sta = calloc_a(sizeof(*sta),
1070                        &name_buf, strlen(name) + 1,
1071                        &vif_buf, strlen(vif) + 1);
1072         sta->name = strcpy(name_buf, name);
1073         sta->vif = strcpy(vif_buf, vif);
1074         sta->wdev = wdev;
1075         sta->config = data;
1076         sta->section = section;
1077
1078         vlist_add(&wdev->stations, &sta->node, sta->name);
1079 }
1080
1081 /* ubus callback network.wireless.status, runs for every interface, encode the station */
1082 static void
1083 wireless_station_status(struct wireless_station *sta, struct blob_buf *b)
1084 {
1085         void *i;
1086
1087         i = blobmsg_open_table(b, NULL);
1088         if (sta->section)
1089                 blobmsg_add_string(b, "section", sta->section);
1090         put_container(b, sta->config, "config");
1091         blobmsg_close_table(b, i);
1092 }
1093
1094 /* create a vlan object. Called by config */
1095 void
1096 wireless_vlan_create(struct wireless_device *wdev, char *vif, struct blob_attr *data, const char *section)
1097 {
1098         struct wireless_vlan *vlan;
1099         struct blob_attr *tb[__VLAN_ATTR_MAX];
1100         struct blob_attr *cur;
1101         char *name_buf, *vif_buf;
1102         char name[8];
1103
1104         blobmsg_parse(vlan_policy, __VLAN_ATTR_MAX, tb, blob_data(data), blob_len(data));
1105
1106         cur = tb[VLAN_ATTR_DISABLED];
1107         if (cur && blobmsg_get_bool(cur))
1108                 return;
1109
1110         sprintf(name, "%d", wdev->vlan_idx++);
1111
1112         vlan = calloc_a(sizeof(*vlan),
1113                        &name_buf, strlen(name) + 1,
1114                        &vif_buf, strlen(vif) + 1);
1115         vlan->name = strcpy(name_buf, name);
1116         vlan->vif = strcpy(vif_buf, vif);
1117         vlan->wdev = wdev;
1118         vlan->config = data;
1119         vlan->section = section;
1120         vlan->isolate = false;
1121
1122         vlist_add(&wdev->vlans, &vlan->node, vlan->name);
1123 }
1124
1125 /* ubus callback network.wireless.status, runs for every interface, encode the vlan informations */
1126 static void
1127 wireless_vlan_status(struct wireless_vlan *vlan, struct blob_buf *b)
1128 {
1129         void *i;
1130
1131         i = blobmsg_open_table(b, NULL);
1132         if (vlan->section)
1133                 blobmsg_add_string(b, "section", vlan->section);
1134         if (vlan->ifname)
1135                 blobmsg_add_string(b, "ifname", vlan->ifname);
1136         put_container(b, vlan->config, "config");
1137         blobmsg_close_table(b, i);
1138 }
1139
1140 /* create a wireless interface object. Called by config */
1141 struct wireless_interface* wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
1142 {
1143         struct wireless_interface *vif;
1144         struct blob_attr *tb[__VIF_ATTR_MAX];
1145         struct blob_attr *cur;
1146         char *name_buf;
1147         char name[8];
1148
1149         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
1150
1151         cur = tb[VIF_ATTR_DISABLED];
1152         if (cur && blobmsg_get_bool(cur))
1153                 return NULL;
1154
1155         sprintf(name, "%d", wdev->vif_idx++);
1156
1157         vif = calloc_a(sizeof(*vif),
1158                        &name_buf, strlen(name) + 1);
1159         vif->name = strcpy(name_buf, name);
1160         vif->wdev = wdev;
1161         vif->config = data;
1162         vif->section = section;
1163         vif->isolate = false;
1164
1165         vlist_add(&wdev->interfaces, &vif->node, vif->name);
1166
1167         return vlist_find(&wdev->interfaces, name, vif, node);
1168 }
1169
1170 /* ubus callback network.wireless.status, runs for every interface */
1171 static void
1172 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
1173 {
1174         struct wireless_vlan *vlan;
1175         struct wireless_station *sta;
1176         void *i, *j;
1177
1178         i = blobmsg_open_table(b, NULL);
1179         if (iface->section)
1180                 blobmsg_add_string(b, "section", iface->section);
1181         if (iface->ifname)
1182                 blobmsg_add_string(b, "ifname", iface->ifname);
1183         put_container(b, iface->config, "config");
1184         j = blobmsg_open_array(b, "vlans");
1185         vlist_for_each_element(&iface->wdev->vlans, vlan, node)
1186                 if (!strcmp(iface->name, vlan->vif))
1187                         wireless_vlan_status(vlan, b);
1188         blobmsg_close_array(b, j);
1189         j = blobmsg_open_array(b, "stations");
1190         vlist_for_each_element(&iface->wdev->stations, sta, node)
1191                 if (!strcmp(iface->name, sta->vif))
1192                         wireless_station_status(sta, b);
1193         blobmsg_close_array(b, j);
1194         blobmsg_close_table(b, i);
1195 }
1196
1197 /* ubus callback network.wireless.status */
1198 void
1199 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
1200 {
1201         struct wireless_interface *iface;
1202         void *c, *i;
1203
1204         c = blobmsg_open_table(b, wdev->name);
1205         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
1206         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
1207         blobmsg_add_u8(b, "autostart", wdev->autostart);
1208         blobmsg_add_u8(b, "disabled", wdev->disabled);
1209         blobmsg_add_u8(b, "retry_setup_failed", wdev->retry_setup_failed);
1210         put_container(b, wdev->config, "config");
1211
1212         i = blobmsg_open_array(b, "interfaces");
1213         vlist_for_each_element(&wdev->interfaces, iface, node)
1214                 wireless_interface_status(iface, b);
1215         blobmsg_close_array(b, i);
1216         blobmsg_close_table(b, c);
1217 }
1218
1219 /* ubus callback network.wireless.get_validate */
1220 void
1221 wireless_device_get_validate(struct wireless_device *wdev, struct blob_buf *b)
1222 {
1223         struct uci_blob_param_list *p;
1224         void *c, *d;
1225         int i;
1226
1227         c = blobmsg_open_table(b, wdev->name);
1228
1229         d = blobmsg_open_table(b, "device");
1230         p = wdev->drv->device.config;
1231         for (i = 0; i < p->n_params; i++)
1232                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
1233         blobmsg_close_table(b, d);
1234
1235         d = blobmsg_open_table(b, "interface");
1236         p = wdev->drv->interface.config;
1237         for (i = 0; i < p->n_params; i++)
1238                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
1239         blobmsg_close_table(b, d);
1240
1241         blobmsg_close_table(b, c);
1242 }
1243
1244 /* ubus callback network.wireless.notify, command = set data, for vif */
1245 static void
1246 wireless_interface_set_data(struct wireless_interface *vif)
1247 {
1248         enum {
1249                 VIF_DATA_IFNAME,
1250                 __VIF_DATA_MAX,
1251         };
1252         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
1253                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
1254         };
1255         struct blob_attr *tb[__VIF_DATA_MAX];
1256         struct blob_attr *cur;
1257
1258         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
1259                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
1260
1261         if ((cur = tb[VIF_DATA_IFNAME]))
1262                 vif->ifname = blobmsg_data(cur);
1263 }
1264
1265 /* ubus callback network.wireless.notify, command = set data, for vlan */
1266 static void
1267 wireless_vlan_set_data(struct wireless_vlan *vlan)
1268 {
1269         enum {
1270                 VLAN_DATA_IFNAME,
1271                 __VLAN_DATA_MAX,
1272         };
1273         static const struct blobmsg_policy data_policy[__VLAN_DATA_MAX] = {
1274                 [VLAN_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
1275         };
1276         struct blob_attr *tb[__VLAN_DATA_MAX];
1277         struct blob_attr *cur;
1278
1279         blobmsg_parse(data_policy, __VLAN_DATA_MAX, tb,
1280                       blobmsg_data(vlan->data), blobmsg_data_len(vlan->data));
1281
1282         if ((cur = tb[VLAN_DATA_IFNAME]))
1283                 vlan->ifname = blobmsg_data(cur);
1284 }
1285
1286 /* ubus callback network.wireless.notify, command = process add */
1287 static int
1288 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
1289 {
1290         enum {
1291                 PROC_ATTR_PID,
1292                 PROC_ATTR_EXE,
1293                 PROC_ATTR_REQUIRED,
1294                 PROC_ATTR_KEEP,
1295                 __PROC_ATTR_MAX
1296         };
1297         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
1298                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
1299                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
1300                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
1301                 [PROC_ATTR_KEEP] = { .name = "keep", .type = BLOBMSG_TYPE_BOOL },
1302         };
1303         struct blob_attr *tb[__PROC_ATTR_MAX];
1304         struct wireless_process *proc;
1305         char *name;
1306         int pid;
1307
1308         if (!data)
1309                 return UBUS_STATUS_INVALID_ARGUMENT;
1310
1311         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
1312         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
1313                 return UBUS_STATUS_INVALID_ARGUMENT;
1314
1315         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
1316         if (pid < 2)
1317                 return UBUS_STATUS_INVALID_ARGUMENT;
1318
1319         proc = calloc_a(sizeof(*proc),
1320                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
1321
1322         proc->pid = pid;
1323         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
1324
1325         if (tb[PROC_ATTR_REQUIRED])
1326                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
1327
1328         if (tb[PROC_ATTR_KEEP])
1329                 proc->keep = blobmsg_get_bool(tb[PROC_ATTR_KEEP]);
1330
1331         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
1332         list_add(&proc->list, &wdev->script_proc);
1333         uloop_timeout_set(&wdev->script_check, 0);
1334
1335         return 0;
1336 }
1337
1338 /* ubus callback network.wireless.notify, command = process kill all */
1339 static int
1340 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
1341                                  struct ubus_request_data *req)
1342 {
1343         enum {
1344                 KILL_ATTR_SIGNAL,
1345                 KILL_ATTR_IMMEDIATE,
1346                 __KILL_ATTR_MAX
1347         };
1348         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
1349                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
1350                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
1351         };
1352         struct blob_attr *tb[__KILL_ATTR_MAX];
1353         struct blob_attr *cur;
1354         bool immediate = false;
1355         int signal = SIGTERM;
1356
1357         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
1358
1359         if ((cur = tb[KILL_ATTR_SIGNAL]))
1360                 signal = blobmsg_get_u32(cur);
1361
1362         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
1363                 immediate = blobmsg_get_bool(cur);
1364
1365         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
1366                 return UBUS_STATUS_PERMISSION_DENIED;
1367
1368         wireless_process_kill_all(wdev, signal, immediate);
1369
1370         if (list_empty(&wdev->script_proc))
1371                 return 0;
1372
1373         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
1374         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
1375
1376         return 0;
1377 }
1378
1379 /* ubus callback network.wireless.notify, command = set_retry */
1380 static int
1381 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
1382 {
1383         static const struct blobmsg_policy retry_policy = {
1384                 .name = "retry", .type = BLOBMSG_TYPE_INT32
1385         };
1386         struct blob_attr *val;
1387
1388         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
1389         if (!val)
1390                 return UBUS_STATUS_INVALID_ARGUMENT;
1391
1392         wdev->retry = blobmsg_get_u32(val);
1393         return 0;
1394 }
1395
1396 enum {
1397         NOTIFY_CMD_UP = 0,
1398         NOTIFY_CMD_SET_DATA = 1,
1399         NOTIFY_CMD_PROCESS_ADD = 2,
1400         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
1401         NOTIFY_CMD_SET_RETRY = 4,
1402 };
1403
1404 /* ubus callback network.wireless.notify */
1405 int
1406 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
1407                        struct ubus_request_data *req)
1408 {
1409         enum {
1410                 NOTIFY_ATTR_COMMAND,
1411                 NOTIFY_ATTR_VIF,
1412                 NOTIFY_ATTR_VLAN,
1413                 NOTIFY_ATTR_DATA,
1414                 __NOTIFY_MAX,
1415         };
1416         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
1417                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
1418                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
1419                 [NOTIFY_ATTR_VLAN] = { .name = "vlan", .type = BLOBMSG_TYPE_STRING },
1420                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
1421         };
1422         struct wireless_interface *vif = NULL;
1423         struct wireless_vlan *vlan = NULL;
1424         struct blob_attr *tb[__NOTIFY_MAX];
1425         struct blob_attr *cur, **pdata;
1426
1427         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
1428
1429         if (!tb[NOTIFY_ATTR_COMMAND])
1430                 return UBUS_STATUS_INVALID_ARGUMENT;
1431
1432         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
1433                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
1434                 if (!vif)
1435                         return UBUS_STATUS_NOT_FOUND;
1436         }
1437
1438         if ((cur = tb[NOTIFY_ATTR_VLAN]) != NULL) {
1439                 vlan = vlist_find(&wdev->vlans, blobmsg_data(cur), vlan, node);
1440                 if (!vlan)
1441                         return UBUS_STATUS_NOT_FOUND;
1442         }
1443
1444         cur = tb[NOTIFY_ATTR_DATA];
1445         if (!cur)
1446                 return UBUS_STATUS_INVALID_ARGUMENT;
1447
1448         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
1449         case NOTIFY_CMD_UP:
1450                 if (vif || vlan)
1451                         return UBUS_STATUS_INVALID_ARGUMENT;
1452
1453                 if (wdev->state != IFS_SETUP)
1454                         return UBUS_STATUS_PERMISSION_DENIED;
1455
1456                 wireless_device_mark_up(wdev);
1457                 break;
1458         case NOTIFY_CMD_SET_DATA:
1459                 if (vif)
1460                         pdata = &vif->data;
1461                 else if (vlan)
1462                         pdata = &vlan->data;
1463                 else
1464                         pdata = &wdev->data;
1465
1466                 if (*pdata)
1467                         return UBUS_STATUS_INVALID_ARGUMENT;
1468
1469                 *pdata = blob_memdup(cur);
1470                 if (vif)
1471                         wireless_interface_set_data(vif);
1472                 else if (vlan)
1473                         wireless_vlan_set_data(vlan);
1474                 break;
1475         case NOTIFY_CMD_PROCESS_ADD:
1476                 return wireless_device_add_process(wdev, cur);
1477         case NOTIFY_CMD_PROCESS_KILL_ALL:
1478                 return wireless_device_process_kill_all(wdev, cur, req);
1479         case NOTIFY_CMD_SET_RETRY:
1480                 return wireless_device_set_retry(wdev, cur);
1481         default:
1482                 return UBUS_STATUS_INVALID_ARGUMENT;
1483         }
1484
1485         return 0;
1486 }
1487
1488 /* called on startup and by netifd reload() */
1489 void
1490 wireless_start_pending(void)
1491 {
1492         struct wireless_device *wdev;
1493
1494         vlist_for_each_element(&wireless_devices, wdev, node)
1495                 __wireless_device_set_up(wdev, 0);
1496 }