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