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 #include <signal.h>
  15 #include "netifd.h"
  16 #include "wireless.h"
  17 #include "handler.h"
  18 #include "ubus.h"
  19
  20 #define WIRELESS_SETUP_RETRY    3
  21
  22 struct vlist_tree wireless_devices;
  23 struct avl_tree wireless_drivers;
  24 static struct blob_buf b;
  25 static int drv_fd;
  26
  27 static const struct blobmsg_policy wdev_policy =
  28         { .name = "disabled", .type = BLOBMSG_TYPE_BOOL };
  29
  30 static const struct uci_blob_param_list wdev_param = {
  31         .n_params = 1,
  32         .params = &wdev_policy,
  33 };
  34
  35 enum {
  36         VIF_ATTR_DISABLED,
  37         VIF_ATTR_NETWORK,
  38         VIF_ATTR_ISOLATE,
  39         __VIF_ATTR_MAX,
  40 };
  41
  42 static const struct blobmsg_policy vif_policy[__VIF_ATTR_MAX] = {
  43         [VIF_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
  44         [VIF_ATTR_NETWORK] = { .name = "network", .type = BLOBMSG_TYPE_ARRAY },
  45         [VIF_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
  46 };
  47
  48 static const struct uci_blob_param_list vif_param = {
  49         .n_params = ARRAY_SIZE(vif_policy),
  50         .params = vif_policy,
  51 };
  52
  53 static void
  54 put_container(struct blob_buf *buf, struct blob_attr *attr, const char *name)
  55 {
  56         void *c = blobmsg_open_table(buf, name);
  57         blob_put_raw(buf, blob_data(attr), blob_len(attr));
  58         blobmsg_close_table(buf, c);
  59 }
  60
  61 static void
  62 vif_config_add_bridge(struct blob_buf *buf, struct blob_attr *networks, bool prepare)
  63 {
  64         struct interface *iface;
  65         struct device *dev = NULL;
  66         struct blob_attr *cur;
  67         const char *network;
  68         int rem;
  69
  70         if (!networks)
  71                 return;
  72
  73         blobmsg_for_each_attr(cur, networks, rem) {
  74                 network = blobmsg_data(cur);
  75
  76                 iface = vlist_find(&interfaces, network, iface, node);
  77                 if (!iface)
  78                         continue;
  79
  80                 dev = iface->main_dev.dev;
  81                 if (!dev)
  82                         return;
  83
  84                 if (dev->type != &bridge_device_type)
  85                         return;
  86         }
  87
  88         if (!dev)
  89                 return;
  90
  91         if (dev->hotplug_ops && dev->hotplug_ops->prepare)
  92                 dev->hotplug_ops->prepare(dev);
  93
  94         blobmsg_add_string(buf, "bridge", dev->ifname);
  95
  96         if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
  97                 blobmsg_add_u8(buf, "multicast_to_unicast",
  98                                dev->settings.multicast_to_unicast);
  99 }
 100
 101 static void
 102 prepare_config(struct wireless_device *wdev, struct blob_buf *buf, bool up)
 103 {
 104         struct wireless_interface *vif;
 105         void *l, *i;
 106
 107         blob_buf_init(&b, 0);
 108         put_container(&b, wdev->config, "config");
 109         if (wdev->data)
 110                 blobmsg_add_blob(&b, wdev->data);
 111
 112         l = blobmsg_open_table(&b, "interfaces");
 113         vlist_for_each_element(&wdev->interfaces, vif, node) {
 114                 i = blobmsg_open_table(&b, vif->name);
 115                 vif_config_add_bridge(&b, vif->network, up);
 116                 put_container(&b, vif->config, "config");
 117                 if (vif->data)
 118                         blobmsg_add_blob(&b, vif->data);
 119                 blobmsg_close_table(&b, i);
 120         }
 121         blobmsg_close_table(&b, l);
 122 }
 123
 124 static bool
 125 wireless_process_check(struct wireless_process *proc)
 126 {
 127         return check_pid_path(proc->pid, proc->exe);
 128 }
 129
 130 static void
 131 wireless_complete_kill_request(struct wireless_device *wdev)
 132 {
 133         if (!wdev->kill_request)
 134                 return;
 135
 136         ubus_complete_deferred_request(ubus_ctx, wdev->kill_request, 0);
 137         free(wdev->kill_request);
 138         wdev->kill_request = NULL;
 139 }
 140
 141 static void
 142 wireless_process_free(struct wireless_device *wdev, struct wireless_process *proc)
 143 {
 144         D(WIRELESS, "Wireless device '%s' free pid %d\n", wdev->name, proc->pid);
 145         list_del(&proc->list);
 146         free(proc);
 147
 148         if (list_empty(&wdev->script_proc))
 149                 wireless_complete_kill_request(wdev);
 150 }
 151
 152 static void
 153 wireless_close_script_proc_fd(struct wireless_device *wdev)
 154 {
 155         if (wdev->script_proc_fd.fd < 0)
 156                 return;
 157
 158         uloop_fd_delete(&wdev->script_proc_fd);
 159         close(wdev->script_proc_fd.fd);
 160         wdev->script_proc_fd.fd = -1;
 161 }
 162
 163 static void
 164 wireless_process_kill_all(struct wireless_device *wdev, int signal, bool free)
 165 {
 166         struct wireless_process *proc, *tmp;
 167
 168         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 169                 bool check = wireless_process_check(proc);
 170
 171                 if (check) {
 172                         D(WIRELESS, "Wireless device '%s' kill pid %d\n", wdev->name, proc->pid);
 173                         kill(proc->pid, signal);
 174                 }
 175
 176                 if (free || !check)
 177                         wireless_process_free(wdev, proc);
 178         }
 179
 180         if (free)
 181                 wireless_close_script_proc_fd(wdev);
 182 }
 183
 184 static void
 185 wireless_device_free_state(struct wireless_device *wdev)
 186 {
 187         struct wireless_interface *vif;
 188
 189         uloop_timeout_cancel(&wdev->script_check);
 190         uloop_timeout_cancel(&wdev->timeout);
 191         wireless_complete_kill_request(wdev);
 192         free(wdev->data);
 193         wdev->data = NULL;
 194         vlist_for_each_element(&wdev->interfaces, vif, node) {
 195                 free(vif->data);
 196                 vif->data = NULL;
 197                 vif->ifname = NULL;
 198         }
 199 }
 200
 201 static void wireless_interface_handle_link(struct wireless_interface *vif, bool up)
 202 {
 203         struct interface *iface;
 204         struct blob_attr *cur;
 205         const char *network;
 206         int rem;
 207
 208         if (!vif->network || !vif->ifname)
 209                 return;
 210
 211         if (up) {
 212                 struct device *dev = device_get(vif->ifname, 2);
 213                 if (dev) {
 214                         dev->wireless_isolate = vif->isolate;
 215                         dev->wireless = true;
 216                 }
 217         }
 218
 219         blobmsg_for_each_attr(cur, vif->network, rem) {
 220                 network = blobmsg_data(cur);
 221
 222                 iface = vlist_find(&interfaces, network, iface, node);
 223                 if (!iface)
 224                         continue;
 225
 226                 interface_handle_link(iface, vif->ifname, up, true);
 227         }
 228 }
 229
 230 static void
 231 wireless_device_setup_cancel(struct wireless_device *wdev)
 232 {
 233         if (wdev->cancel)
 234                 return;
 235
 236         D(WIRELESS, "Cancel wireless device '%s' setup\n", wdev->name);
 237         wdev->cancel = true;
 238         uloop_timeout_set(&wdev->timeout, 10 * 1000);
 239 }
 240
 241 static void
 242 wireless_device_run_handler(struct wireless_device *wdev, bool up)
 243 {
 244         const char *action = up ? "setup" : "teardown";
 245         const char *argv[6];
 246         char *config;
 247         int i = 0;
 248         int fds[2] = { -1, -1 };
 249
 250         D(WIRELESS, "Wireless device '%s' run %s handler\n", wdev->name, action);
 251         if (!up && wdev->prev_config) {
 252                 config = blobmsg_format_json(wdev->prev_config, true);
 253                 free(wdev->prev_config);
 254                 wdev->prev_config = NULL;
 255         } else {
 256                 prepare_config(wdev, &b, up);
 257                 config = blobmsg_format_json(b.head, true);
 258         }
 259
 260         argv[i++] = wdev->drv->script;
 261         argv[i++] = wdev->drv->name;
 262         argv[i++] = action;
 263         argv[i++] = wdev->name;
 264         argv[i++] = config;
 265         argv[i] = NULL;
 266
 267         if (up && pipe(fds) == 0) {
 268                 wdev->script_proc_fd.fd = fds[0];
 269                 uloop_fd_add(&wdev->script_proc_fd,
 270                              ULOOP_READ | ULOOP_EDGE_TRIGGER);
 271         }
 272
 273         netifd_start_process(argv, NULL, &wdev->script_task);
 274
 275         if (fds[1] >= 0)
 276                 close(fds[1]);
 277
 278         free(config);
 279 }
 280
 281 static void
 282 __wireless_device_set_up(struct wireless_device *wdev)
 283 {
 284         if (wdev->disabled)
 285                 return;
 286
 287         if (wdev->state != IFS_DOWN || config_init)
 288                 return;
 289
 290         free(wdev->prev_config);
 291         wdev->prev_config = NULL;
 292         wdev->state = IFS_SETUP;
 293         wireless_device_run_handler(wdev, true);
 294 }
 295
 296 static void
 297 wireless_device_free(struct wireless_device *wdev)
 298 {
 299         vlist_flush_all(&wdev->interfaces);
 300         avl_delete(&wireless_devices.avl, &wdev->node.avl);
 301         free(wdev->config);
 302         free(wdev->prev_config);
 303         free(wdev);
 304 }
 305
 306 static void
 307 wdev_handle_config_change(struct wireless_device *wdev)
 308 {
 309         enum interface_config_state state = wdev->config_state;
 310
 311         switch(state) {
 312         case IFC_NORMAL:
 313         case IFC_RELOAD:
 314                 wdev->config_state = IFC_NORMAL;
 315                 if (wdev->autostart)
 316                         __wireless_device_set_up(wdev);
 317                 break;
 318         case IFC_REMOVE:
 319                 wireless_device_free(wdev);
 320                 break;
 321         }
 322 }
 323
 324 static void
 325 wireless_device_mark_down(struct wireless_device *wdev)
 326 {
 327         struct wireless_interface *vif;
 328
 329         D(WIRELESS, "Wireless device '%s' is now down\n", wdev->name);
 330
 331         vlist_for_each_element(&wdev->interfaces, vif, node)
 332                 wireless_interface_handle_link(vif, false);
 333
 334         wireless_process_kill_all(wdev, SIGTERM, true);
 335
 336         wdev->cancel = false;
 337         wdev->state = IFS_DOWN;
 338         wireless_device_free_state(wdev);
 339         wdev_handle_config_change(wdev);
 340 }
 341
 342 static void
 343 wireless_device_setup_timeout(struct uloop_timeout *timeout)
 344 {
 345         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 346
 347         netifd_kill_process(&wdev->script_task);
 348         wdev->script_task.cb(&wdev->script_task, -1);
 349         wireless_device_mark_down(wdev);
 350 }
 351
 352 void
 353 wireless_device_set_up(struct wireless_device *wdev)
 354 {
 355         wdev->retry = WIRELESS_SETUP_RETRY;
 356         wdev->autostart = true;
 357         __wireless_device_set_up(wdev);
 358 }
 359
 360 static void
 361 __wireless_device_set_down(struct wireless_device *wdev)
 362 {
 363         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 364                 return;
 365
 366         if (wdev->script_task.uloop.pending) {
 367                 wireless_device_setup_cancel(wdev);
 368                 return;
 369         }
 370
 371         wdev->state = IFS_TEARDOWN;
 372         wireless_device_run_handler(wdev, false);
 373 }
 374
 375 static void
 376 wireless_device_mark_up(struct wireless_device *wdev)
 377 {
 378         struct wireless_interface *vif;
 379
 380         if (wdev->cancel) {
 381                 wdev->cancel = false;
 382                 __wireless_device_set_down(wdev);
 383                 return;
 384         }
 385
 386         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 387         wdev->state = IFS_UP;
 388         vlist_for_each_element(&wdev->interfaces, vif, node)
 389                 wireless_interface_handle_link(vif, true);
 390 }
 391
 392 static void
 393 wireless_device_retry_setup(struct wireless_device *wdev)
 394 {
 395         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN || wdev->cancel)
 396                 return;
 397
 398         if (--wdev->retry < 0)
 399                 wdev->autostart = false;
 400
 401         __wireless_device_set_down(wdev);
 402 }
 403
 404 static void
 405 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 406 {
 407         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 408
 409         switch (wdev->state) {
 410         case IFS_SETUP:
 411                 wireless_device_retry_setup(wdev);
 412                 break;
 413         case IFS_TEARDOWN:
 414                 wireless_device_mark_down(wdev);
 415                 break;
 416         default:
 417                 break;
 418         }
 419 }
 420
 421 void
 422 wireless_device_set_down(struct wireless_device *wdev)
 423 {
 424         wdev->autostart = false;
 425         __wireless_device_set_down(wdev);
 426 }
 427
 428 static void
 429 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 430 {
 431         if (wdev->config_state != IFC_NORMAL)
 432                 return;
 433
 434         wdev->config_state = s;
 435         if (wdev->state == IFS_DOWN)
 436                 wdev_handle_config_change(wdev);
 437         else
 438                 __wireless_device_set_down(wdev);
 439 }
 440
 441 static void
 442 wdev_prepare_prev_config(struct wireless_device *wdev)
 443 {
 444         if (wdev->prev_config)
 445                 return;
 446
 447         prepare_config(wdev, &b, false);
 448         wdev->prev_config = blob_memdup(b.head);
 449 }
 450
 451 static void
 452 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 453 {
 454         struct blob_attr *new_config = wd_new->config;
 455         bool disabled = wd_new->disabled;
 456
 457         free(wd_new);
 458
 459         wdev_prepare_prev_config(wdev);
 460         if (blob_attr_equal(wdev->config, new_config) && wdev->disabled == disabled)
 461                 return;
 462
 463         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 464         free(wdev->config);
 465         wdev->config = blob_memdup(new_config);
 466         wdev->disabled = disabled;
 467         wdev_set_config_state(wdev, IFC_RELOAD);
 468 }
 469
 470 static void
 471 wdev_create(struct wireless_device *wdev)
 472 {
 473         wdev->retry = WIRELESS_SETUP_RETRY;
 474         wdev->config = blob_memdup(wdev->config);
 475 }
 476
 477 static void
 478 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 479             struct vlist_node *node_old)
 480 {
 481         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 482         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 483
 484         if (wd_old && wd_new) {
 485                 wdev_change_config(wd_old, wd_new);
 486         } else if (wd_old) {
 487                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 488                 wdev_set_config_state(wd_old, IFC_REMOVE);
 489         } else if (wd_new) {
 490                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 491                 wdev_create(wd_new);
 492         }
 493 }
 494
 495 static void
 496 wireless_add_handler(const char *script, const char *name, json_object *obj)
 497 {
 498         struct wireless_driver *drv;
 499         char *name_str, *script_str;
 500         json_object *dev_config_obj, *iface_config_obj;
 501         struct uci_blob_param_list *dev_config, *iface_config;
 502
 503         dev_config_obj = json_get_field(obj, "device", json_type_array);
 504         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 505
 506         if (!dev_config_obj || !iface_config_obj)
 507                 return;
 508
 509         drv = calloc_a(sizeof(*drv),
 510                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 511                 &iface_config, sizeof(*iface_config) + sizeof(void *),
 512                 &name_str, strlen(name) + 1,
 513                 &script_str, strlen(script) + 1);
 514
 515         drv->name = strcpy(name_str, name);
 516         drv->script = strcpy(script_str, script);
 517
 518         dev_config->n_next = 1;
 519         dev_config->next[0] = &wdev_param;
 520         drv->device.config = dev_config;
 521
 522         iface_config->n_next = 1;
 523         iface_config->next[0] = &vif_param;
 524         drv->interface.config = iface_config;
 525
 526         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 527         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 528
 529         drv->node.key = drv->name;
 530         avl_insert(&wireless_drivers, &drv->node);
 531         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 532 }
 533
 534 void wireless_init(void)
 535 {
 536         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 537         wireless_devices.keep_old = true;
 538         wireless_devices.no_delete = true;
 539
 540         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 541         drv_fd = netifd_open_subdir("wireless");
 542         if (drv_fd < 0)
 543                 return;
 544
 545         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 546 }
 547
 548 static void
 549 wireless_interface_init_config(struct wireless_interface *vif)
 550 {
 551         struct blob_attr *tb[__VIF_ATTR_MAX];
 552         struct blob_attr *cur;
 553
 554         vif->network = NULL;
 555         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 556
 557         if ((cur = tb[VIF_ATTR_NETWORK]))
 558                 vif->network = cur;
 559 }
 560
 561 static void
 562 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 563            struct vlist_node *node_old)
 564 {
 565         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 566         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 567         struct wireless_device *wdev;
 568
 569         if (vif_old)
 570                 wdev = vif_old->wdev;
 571         else
 572                 wdev = vif_new->wdev;
 573
 574         if (vif_old && vif_new) {
 575                 free((void *) vif_old->section);
 576                 vif_old->section = strdup(vif_new->section);
 577                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 578                         free(vif_new);
 579                         return;
 580                 }
 581
 582                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 583                 free(vif_old->config);
 584                 vif_old->config = blob_memdup(vif_new->config);
 585                 wireless_interface_init_config(vif_old);
 586                 free(vif_new);
 587         } else if (vif_new) {
 588                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 589                 vif_new->section = strdup(vif_new->section);
 590                 vif_new->config = blob_memdup(vif_new->config);
 591                 wireless_interface_init_config(vif_new);
 592         } else if (vif_old) {
 593                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 594                 free((void *) vif_old->section);
 595                 free(vif_old->config);
 596                 free(vif_old);
 597         }
 598
 599         wdev_set_config_state(wdev, IFC_RELOAD);
 600 }
 601
 602 static void
 603 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 604 {
 605         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 606         char buf[128];
 607
 608         while (1) {
 609                 int b = read(fd->fd, buf, sizeof(buf));
 610                 if (b < 0) {
 611                         if (errno == EINTR)
 612                                 continue;
 613
 614                         if (errno == EAGAIN)
 615                                 return;
 616
 617                         goto done;
 618                 }
 619
 620                 if (!b)
 621                         goto done;
 622         }
 623
 624 done:
 625         uloop_timeout_set(&wdev->script_check, 0);
 626         wireless_close_script_proc_fd(wdev);
 627 }
 628
 629 static void
 630 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 631 {
 632         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 633         struct wireless_process *proc, *tmp;
 634         bool restart = false;
 635
 636         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 637                 if (wireless_process_check(proc))
 638                         continue;
 639
 640                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 641                 if (proc->required)
 642                         restart = true;
 643
 644                 wireless_process_free(wdev, proc);
 645         }
 646
 647         if (restart)
 648                 wireless_device_retry_setup(wdev);
 649         else
 650                 uloop_timeout_set(&wdev->script_check, 1000);
 651 }
 652
 653 void
 654 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 655 {
 656         struct wireless_device *wdev;
 657         char *name_buf;
 658         struct blob_attr *disabled;
 659
 660         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 661
 662         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 663         if (disabled && blobmsg_get_bool(disabled))
 664                 wdev->disabled = true;
 665         wdev->drv = drv;
 666         wdev->state = IFS_DOWN;
 667         wdev->config_state = IFC_NORMAL;
 668         wdev->name = strcpy(name_buf, name);
 669         wdev->config = data;
 670         wdev->config_autostart = true;
 671         wdev->autostart = wdev->config_autostart;
 672         INIT_LIST_HEAD(&wdev->script_proc);
 673         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 674         wdev->interfaces.keep_old = true;
 675
 676         wdev->timeout.cb = wireless_device_setup_timeout;
 677         wdev->script_task.cb = wireless_device_script_task_cb;
 678         wdev->script_task.dir_fd = drv_fd;
 679         wdev->script_task.log_prefix = wdev->name;
 680
 681         wdev->script_proc_fd.fd = -1;
 682         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 683
 684         wdev->script_check.cb = wireless_device_check_script_tasks;
 685
 686         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 687 }
 688
 689 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 690 {
 691         struct wireless_interface *vif;
 692         struct blob_attr *tb[__VIF_ATTR_MAX];
 693         struct blob_attr *cur;
 694         char *name_buf;
 695         char name[8];
 696
 697         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 698
 699         cur = tb[VIF_ATTR_DISABLED];
 700         if (cur && blobmsg_get_bool(cur))
 701                 return;
 702
 703         sprintf(name, "%d", wdev->vif_idx++);
 704
 705         vif = calloc_a(sizeof(*vif),
 706                        &name_buf, strlen(name) + 1);
 707         vif->name = strcpy(name_buf, name);
 708         vif->wdev = wdev;
 709         vif->config = data;
 710         vif->section = section;
 711         vif->isolate = false;
 712
 713         cur = tb[VIF_ATTR_ISOLATE];
 714         if (cur && blobmsg_get_bool(cur))
 715                 vif->isolate = blobmsg_get_bool(cur);
 716
 717         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 718 }
 719
 720 static void
 721 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 722 {
 723         void *i;
 724
 725         i = blobmsg_open_table(b, NULL);
 726         if (iface->section)
 727                 blobmsg_add_string(b, "section", iface->section);
 728         if (iface->ifname)
 729                 blobmsg_add_string(b, "ifname", iface->ifname);
 730         put_container(b, iface->config, "config");
 731         blobmsg_close_table(b, i);
 732 }
 733
 734 void
 735 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 736 {
 737         struct wireless_interface *iface;
 738         void *c, *i;
 739
 740         c = blobmsg_open_table(b, wdev->name);
 741         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 742         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 743         blobmsg_add_u8(b, "autostart", wdev->autostart);
 744         blobmsg_add_u8(b, "disabled", wdev->disabled);
 745         put_container(b, wdev->config, "config");
 746
 747         i = blobmsg_open_array(b, "interfaces");
 748         vlist_for_each_element(&wdev->interfaces, iface, node)
 749                 wireless_interface_status(iface, b);
 750         blobmsg_close_array(b, i);
 751         blobmsg_close_table(b, c);
 752 }
 753
 754 void
 755 wireless_device_get_validate(struct wireless_device *wdev, struct blob_buf *b)
 756 {
 757         struct uci_blob_param_list *p;
 758         void *c, *d;
 759         int i;
 760
 761         c = blobmsg_open_table(b, wdev->name);
 762
 763         d = blobmsg_open_table(b, "device");
 764         p = wdev->drv->device.config;
 765         for (i = 0; i < p->n_params; i++)
 766                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 767         blobmsg_close_table(b, d);
 768
 769         d = blobmsg_open_table(b, "interface");
 770         p = wdev->drv->interface.config;
 771         for (i = 0; i < p->n_params; i++)
 772                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 773         blobmsg_close_table(b, d);
 774
 775         blobmsg_close_table(b, c);
 776 }
 777
 778 static void
 779 wireless_interface_set_data(struct wireless_interface *vif)
 780 {
 781         enum {
 782                 VIF_DATA_IFNAME,
 783                 __VIF_DATA_MAX,
 784         };
 785         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 786                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 787         };
 788         struct blob_attr *tb[__VIF_DATA_MAX];
 789         struct blob_attr *cur;
 790
 791         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 792                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 793
 794         if ((cur = tb[VIF_DATA_IFNAME]))
 795                 vif->ifname = blobmsg_data(cur);
 796 }
 797
 798 static int
 799 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 800 {
 801         enum {
 802                 PROC_ATTR_PID,
 803                 PROC_ATTR_EXE,
 804                 PROC_ATTR_REQUIRED,
 805                 __PROC_ATTR_MAX
 806         };
 807         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 808                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 809                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 810                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 811         };
 812         struct blob_attr *tb[__PROC_ATTR_MAX];
 813         struct wireless_process *proc;
 814         char *name;
 815         int pid;
 816
 817         if (!data)
 818                 return UBUS_STATUS_INVALID_ARGUMENT;
 819
 820         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 821         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 822                 return UBUS_STATUS_INVALID_ARGUMENT;
 823
 824         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 825         if (pid < 2)
 826                 return UBUS_STATUS_INVALID_ARGUMENT;
 827
 828         proc = calloc_a(sizeof(*proc),
 829                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 830
 831         proc->pid = pid;
 832         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 833
 834         if (tb[PROC_ATTR_REQUIRED])
 835                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 836
 837         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 838         list_add(&proc->list, &wdev->script_proc);
 839         uloop_timeout_set(&wdev->script_check, 0);
 840
 841         return 0;
 842 }
 843
 844 static int
 845 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 846                                  struct ubus_request_data *req)
 847 {
 848         enum {
 849                 KILL_ATTR_SIGNAL,
 850                 KILL_ATTR_IMMEDIATE,
 851                 __KILL_ATTR_MAX
 852         };
 853         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 854                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 855                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 856         };
 857         struct blob_attr *tb[__KILL_ATTR_MAX];
 858         struct blob_attr *cur;
 859         bool immediate = false;
 860         int signal = SIGTERM;
 861
 862         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 863
 864         if ((cur = tb[KILL_ATTR_SIGNAL]))
 865                 signal = blobmsg_get_u32(cur);
 866
 867         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 868                 immediate = blobmsg_get_bool(cur);
 869
 870         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 871                 return UBUS_STATUS_PERMISSION_DENIED;
 872
 873         wireless_process_kill_all(wdev, signal, immediate);
 874
 875         if (list_empty(&wdev->script_proc))
 876                 return 0;
 877
 878         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 879         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 880
 881         return 0;
 882 }
 883
 884 static int
 885 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 886 {
 887         static const struct blobmsg_policy retry_policy = {
 888                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 889         };
 890         struct blob_attr *val;
 891
 892         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 893         if (!val)
 894                 return UBUS_STATUS_INVALID_ARGUMENT;
 895
 896         wdev->retry = blobmsg_get_u32(val);
 897         return 0;
 898 }
 899
 900 enum {
 901         NOTIFY_CMD_UP = 0,
 902         NOTIFY_CMD_SET_DATA = 1,
 903         NOTIFY_CMD_PROCESS_ADD = 2,
 904         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 905         NOTIFY_CMD_SET_RETRY = 4,
 906 };
 907
 908 int
 909 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 910                        struct ubus_request_data *req)
 911 {
 912         enum {
 913                 NOTIFY_ATTR_COMMAND,
 914                 NOTIFY_ATTR_VIF,
 915                 NOTIFY_ATTR_DATA,
 916                 __NOTIFY_MAX,
 917         };
 918         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 919                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 920                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 921                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 922         };
 923         struct wireless_interface *vif = NULL;
 924         struct blob_attr *tb[__NOTIFY_MAX];
 925         struct blob_attr *cur, **pdata;
 926
 927         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 928
 929         if (!tb[NOTIFY_ATTR_COMMAND])
 930                 return UBUS_STATUS_INVALID_ARGUMENT;
 931
 932         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 933                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 934                 if (!vif)
 935                         return UBUS_STATUS_NOT_FOUND;
 936         }
 937
 938         cur = tb[NOTIFY_ATTR_DATA];
 939         if (!cur)
 940                 return UBUS_STATUS_INVALID_ARGUMENT;
 941
 942         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 943         case NOTIFY_CMD_UP:
 944                 if (vif)
 945                         return UBUS_STATUS_INVALID_ARGUMENT;
 946
 947                 if (wdev->state != IFS_SETUP)
 948                         return UBUS_STATUS_PERMISSION_DENIED;
 949
 950                 wireless_device_mark_up(wdev);
 951                 break;
 952         case NOTIFY_CMD_SET_DATA:
 953                 if (vif)
 954                         pdata = &vif->data;
 955                 else
 956                         pdata = &wdev->data;
 957
 958                 if (*pdata)
 959                         return UBUS_STATUS_INVALID_ARGUMENT;
 960
 961                 *pdata = blob_memdup(cur);
 962                 if (vif)
 963                         wireless_interface_set_data(vif);
 964                 break;
 965         case NOTIFY_CMD_PROCESS_ADD:
 966                 return wireless_device_add_process(wdev, cur);
 967         case NOTIFY_CMD_PROCESS_KILL_ALL:
 968                 return wireless_device_process_kill_all(wdev, cur, req);
 969         case NOTIFY_CMD_SET_RETRY:
 970                 return wireless_device_set_retry(wdev, cur);
 971         default:
 972                 return UBUS_STATUS_INVALID_ARGUMENT;
 973         }
 974
 975         return 0;
 976 }
 977
 978 void
 979 wireless_start_pending(void)
 980 {
 981         struct wireless_device *wdev;
 982
 983         vlist_for_each_element(&wireless_devices, wdev, node)
 984                 if (wdev->autostart)
 985                         __wireless_device_set_up(wdev);
 986 }