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_MODE,
  40         __VIF_ATTR_MAX,
  41 };
  42
  43 static const struct blobmsg_policy vif_policy[__VIF_ATTR_MAX] = {
  44         [VIF_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
  45         [VIF_ATTR_NETWORK] = { .name = "network", .type = BLOBMSG_TYPE_ARRAY },
  46         [VIF_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
  47         [VIF_ATTR_MODE] = { .name = "mode", .type = BLOBMSG_TYPE_STRING },
  48 };
  49
  50 static const struct uci_blob_param_list vif_param = {
  51         .n_params = ARRAY_SIZE(vif_policy),
  52         .params = vif_policy,
  53 };
  54
  55 static void
  56 put_container(struct blob_buf *buf, struct blob_attr *attr, const char *name)
  57 {
  58         void *c = blobmsg_open_table(buf, name);
  59         blob_put_raw(buf, blob_data(attr), blob_len(attr));
  60         blobmsg_close_table(buf, c);
  61 }
  62
  63 static void
  64 vif_config_add_bridge(struct blob_buf *buf, struct blob_attr *networks, bool prepare)
  65 {
  66         struct interface *iface;
  67         struct device *dev = NULL;
  68         struct blob_attr *cur;
  69         const char *network;
  70         int rem;
  71
  72         if (!networks)
  73                 return;
  74
  75         blobmsg_for_each_attr(cur, networks, rem) {
  76                 network = blobmsg_data(cur);
  77
  78                 iface = vlist_find(&interfaces, network, iface, node);
  79                 if (!iface)
  80                         continue;
  81
  82                 dev = iface->main_dev.dev;
  83                 if (!dev)
  84                         return;
  85
  86                 if (dev->type != &bridge_device_type)
  87                         return;
  88         }
  89
  90         if (!dev)
  91                 return;
  92
  93         if (dev->hotplug_ops && dev->hotplug_ops->prepare)
  94                 dev->hotplug_ops->prepare(dev);
  95
  96         blobmsg_add_string(buf, "bridge", dev->ifname);
  97
  98         if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
  99                 blobmsg_add_u8(buf, "multicast_to_unicast",
 100                                dev->settings.multicast_to_unicast);
 101 }
 102
 103 static void
 104 prepare_config(struct wireless_device *wdev, struct blob_buf *buf, bool up)
 105 {
 106         struct wireless_interface *vif;
 107         void *l, *i;
 108
 109         blob_buf_init(&b, 0);
 110         put_container(&b, wdev->config, "config");
 111         if (wdev->data)
 112                 blobmsg_add_blob(&b, wdev->data);
 113
 114         l = blobmsg_open_table(&b, "interfaces");
 115         vlist_for_each_element(&wdev->interfaces, vif, node) {
 116                 i = blobmsg_open_table(&b, vif->name);
 117                 vif_config_add_bridge(&b, vif->network, up);
 118                 put_container(&b, vif->config, "config");
 119                 if (vif->data)
 120                         blobmsg_add_blob(&b, vif->data);
 121                 blobmsg_close_table(&b, i);
 122         }
 123         blobmsg_close_table(&b, l);
 124 }
 125
 126 static bool
 127 wireless_process_check(struct wireless_process *proc)
 128 {
 129         return check_pid_path(proc->pid, proc->exe);
 130 }
 131
 132 static void
 133 wireless_complete_kill_request(struct wireless_device *wdev)
 134 {
 135         if (!wdev->kill_request)
 136                 return;
 137
 138         ubus_complete_deferred_request(ubus_ctx, wdev->kill_request, 0);
 139         free(wdev->kill_request);
 140         wdev->kill_request = NULL;
 141 }
 142
 143 static void
 144 wireless_process_free(struct wireless_device *wdev, struct wireless_process *proc)
 145 {
 146         D(WIRELESS, "Wireless device '%s' free pid %d\n", wdev->name, proc->pid);
 147         list_del(&proc->list);
 148         free(proc);
 149
 150         if (list_empty(&wdev->script_proc))
 151                 wireless_complete_kill_request(wdev);
 152 }
 153
 154 static void
 155 wireless_close_script_proc_fd(struct wireless_device *wdev)
 156 {
 157         if (wdev->script_proc_fd.fd < 0)
 158                 return;
 159
 160         uloop_fd_delete(&wdev->script_proc_fd);
 161         close(wdev->script_proc_fd.fd);
 162         wdev->script_proc_fd.fd = -1;
 163 }
 164
 165 static void
 166 wireless_process_kill_all(struct wireless_device *wdev, int signal, bool free)
 167 {
 168         struct wireless_process *proc, *tmp;
 169
 170         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 171                 bool check = wireless_process_check(proc);
 172
 173                 if (check) {
 174                         D(WIRELESS, "Wireless device '%s' kill pid %d\n", wdev->name, proc->pid);
 175                         kill(proc->pid, signal);
 176                 }
 177
 178                 if (free || !check)
 179                         wireless_process_free(wdev, proc);
 180         }
 181
 182         if (free)
 183                 wireless_close_script_proc_fd(wdev);
 184 }
 185
 186 static void
 187 wireless_device_free_state(struct wireless_device *wdev)
 188 {
 189         struct wireless_interface *vif;
 190
 191         uloop_timeout_cancel(&wdev->script_check);
 192         uloop_timeout_cancel(&wdev->timeout);
 193         wireless_complete_kill_request(wdev);
 194         free(wdev->data);
 195         wdev->data = NULL;
 196         vlist_for_each_element(&wdev->interfaces, vif, node) {
 197                 free(vif->data);
 198                 vif->data = NULL;
 199                 vif->ifname = NULL;
 200         }
 201 }
 202
 203 static void wireless_interface_handle_link(struct wireless_interface *vif, bool up)
 204 {
 205         struct interface *iface;
 206         struct blob_attr *cur;
 207         const char *network;
 208         int rem;
 209
 210         if (!vif->network || !vif->ifname)
 211                 return;
 212
 213         if (up) {
 214                 struct device *dev = device_get(vif->ifname, 2);
 215                 if (dev) {
 216                         dev->wireless_isolate = vif->isolate;
 217                         dev->wireless = true;
 218                         dev->wireless_ap = vif->ap_mode;
 219                 }
 220         }
 221
 222         blobmsg_for_each_attr(cur, vif->network, rem) {
 223                 network = blobmsg_data(cur);
 224
 225                 iface = vlist_find(&interfaces, network, iface, node);
 226                 if (!iface)
 227                         continue;
 228
 229                 interface_handle_link(iface, vif->ifname, up, true);
 230         }
 231 }
 232
 233 static void
 234 wireless_device_setup_cancel(struct wireless_device *wdev)
 235 {
 236         if (wdev->cancel)
 237                 return;
 238
 239         D(WIRELESS, "Cancel wireless device '%s' setup\n", wdev->name);
 240         wdev->cancel = true;
 241         uloop_timeout_set(&wdev->timeout, 10 * 1000);
 242 }
 243
 244 static void
 245 wireless_device_run_handler(struct wireless_device *wdev, bool up)
 246 {
 247         const char *action = up ? "setup" : "teardown";
 248         const char *argv[6];
 249         char *config;
 250         int i = 0;
 251         int fds[2] = { -1, -1 };
 252
 253         D(WIRELESS, "Wireless device '%s' run %s handler\n", wdev->name, action);
 254         if (!up && wdev->prev_config) {
 255                 config = blobmsg_format_json(wdev->prev_config, true);
 256                 free(wdev->prev_config);
 257                 wdev->prev_config = NULL;
 258         } else {
 259                 prepare_config(wdev, &b, up);
 260                 config = blobmsg_format_json(b.head, true);
 261         }
 262
 263         argv[i++] = wdev->drv->script;
 264         argv[i++] = wdev->drv->name;
 265         argv[i++] = action;
 266         argv[i++] = wdev->name;
 267         argv[i++] = config;
 268         argv[i] = NULL;
 269
 270         if (up && pipe(fds) == 0) {
 271                 wdev->script_proc_fd.fd = fds[0];
 272                 uloop_fd_add(&wdev->script_proc_fd,
 273                              ULOOP_READ | ULOOP_EDGE_TRIGGER);
 274         }
 275
 276         netifd_start_process(argv, NULL, &wdev->script_task);
 277
 278         if (fds[1] >= 0)
 279                 close(fds[1]);
 280
 281         free(config);
 282 }
 283
 284 static void
 285 __wireless_device_set_up(struct wireless_device *wdev)
 286 {
 287         if (wdev->disabled)
 288                 return;
 289
 290         if (wdev->retry_setup_failed)
 291                 return;
 292
 293         if (!wdev->autostart)
 294                 return;
 295
 296         if (wdev->state != IFS_DOWN || config_init)
 297                 return;
 298
 299         free(wdev->prev_config);
 300         wdev->prev_config = NULL;
 301         wdev->state = IFS_SETUP;
 302         wireless_device_run_handler(wdev, true);
 303 }
 304
 305 static void
 306 wireless_device_free(struct wireless_device *wdev)
 307 {
 308         vlist_flush_all(&wdev->interfaces);
 309         avl_delete(&wireless_devices.avl, &wdev->node.avl);
 310         free(wdev->config);
 311         free(wdev->prev_config);
 312         free(wdev);
 313 }
 314
 315 static void
 316 wdev_handle_config_change(struct wireless_device *wdev)
 317 {
 318         enum interface_config_state state = wdev->config_state;
 319
 320         switch(state) {
 321         case IFC_NORMAL:
 322         case IFC_RELOAD:
 323                 __wireless_device_set_up(wdev);
 324
 325                 wdev->config_state = IFC_NORMAL;
 326                 break;
 327         case IFC_REMOVE:
 328                 wireless_device_free(wdev);
 329                 break;
 330         }
 331 }
 332
 333 static void
 334 wireless_device_mark_down(struct wireless_device *wdev)
 335 {
 336         struct wireless_interface *vif;
 337
 338         D(WIRELESS, "Wireless device '%s' is now down\n", wdev->name);
 339
 340         vlist_for_each_element(&wdev->interfaces, vif, node)
 341                 wireless_interface_handle_link(vif, false);
 342
 343         wireless_process_kill_all(wdev, SIGTERM, true);
 344
 345         wdev->cancel = false;
 346         wdev->state = IFS_DOWN;
 347         wireless_device_free_state(wdev);
 348         wdev_handle_config_change(wdev);
 349 }
 350
 351 static void
 352 wireless_device_setup_timeout(struct uloop_timeout *timeout)
 353 {
 354         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 355
 356         netifd_kill_process(&wdev->script_task);
 357         wdev->script_task.cb(&wdev->script_task, -1);
 358         wireless_device_mark_down(wdev);
 359 }
 360
 361 void
 362 wireless_device_set_up(struct wireless_device *wdev)
 363 {
 364         wdev->retry = WIRELESS_SETUP_RETRY;
 365         wdev->autostart = true;
 366         __wireless_device_set_up(wdev);
 367 }
 368
 369 static void
 370 __wireless_device_set_down(struct wireless_device *wdev)
 371 {
 372         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 373                 return;
 374
 375         if (wdev->script_task.uloop.pending) {
 376                 wireless_device_setup_cancel(wdev);
 377                 return;
 378         }
 379
 380         wdev->state = IFS_TEARDOWN;
 381         wireless_device_run_handler(wdev, false);
 382 }
 383
 384 static void
 385 wireless_device_mark_up(struct wireless_device *wdev)
 386 {
 387         struct wireless_interface *vif;
 388
 389         if (wdev->cancel) {
 390                 wdev->cancel = false;
 391                 __wireless_device_set_down(wdev);
 392                 return;
 393         }
 394
 395         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 396         wdev->state = IFS_UP;
 397         vlist_for_each_element(&wdev->interfaces, vif, node)
 398                 wireless_interface_handle_link(vif, true);
 399 }
 400
 401 static void
 402 wireless_device_retry_setup(struct wireless_device *wdev)
 403 {
 404         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN || wdev->cancel)
 405                 return;
 406
 407         if (--wdev->retry < 0)
 408                 wdev->retry_setup_failed = true;
 409
 410         __wireless_device_set_down(wdev);
 411 }
 412
 413 static void
 414 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 415 {
 416         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 417
 418         switch (wdev->state) {
 419         case IFS_SETUP:
 420                 wireless_device_retry_setup(wdev);
 421                 break;
 422         case IFS_TEARDOWN:
 423                 wireless_device_mark_down(wdev);
 424                 break;
 425         default:
 426                 break;
 427         }
 428 }
 429
 430 void
 431 wireless_device_set_down(struct wireless_device *wdev)
 432 {
 433         wdev->retry_setup_failed = false;
 434         wdev->autostart = false;
 435         __wireless_device_set_down(wdev);
 436 }
 437
 438 static void
 439 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 440 {
 441         if (wdev->config_state != IFC_NORMAL)
 442                 return;
 443
 444         wdev->config_state = s;
 445         if (wdev->state == IFS_DOWN)
 446                 wdev_handle_config_change(wdev);
 447         else
 448                 __wireless_device_set_down(wdev);
 449 }
 450
 451 static void
 452 wdev_prepare_prev_config(struct wireless_device *wdev)
 453 {
 454         if (wdev->prev_config)
 455                 return;
 456
 457         prepare_config(wdev, &b, false);
 458         wdev->prev_config = blob_memdup(b.head);
 459 }
 460
 461 static void
 462 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 463 {
 464         struct blob_attr *new_config = wd_new->config;
 465         bool disabled = wd_new->disabled;
 466
 467         free(wd_new);
 468
 469         wdev_prepare_prev_config(wdev);
 470         if (blob_attr_equal(wdev->config, new_config) && wdev->disabled == disabled)
 471                 return;
 472
 473         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 474         free(wdev->config);
 475         wdev->config = blob_memdup(new_config);
 476         wdev->disabled = disabled;
 477         wdev->retry_setup_failed = false;
 478         wdev_set_config_state(wdev, IFC_RELOAD);
 479 }
 480
 481 static void
 482 wdev_create(struct wireless_device *wdev)
 483 {
 484         wdev->retry = WIRELESS_SETUP_RETRY;
 485         wdev->config = blob_memdup(wdev->config);
 486 }
 487
 488 static void
 489 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 490             struct vlist_node *node_old)
 491 {
 492         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 493         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 494
 495         if (wd_old && wd_new) {
 496                 wdev_change_config(wd_old, wd_new);
 497         } else if (wd_old) {
 498                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 499                 wdev_set_config_state(wd_old, IFC_REMOVE);
 500         } else if (wd_new) {
 501                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 502                 wdev_create(wd_new);
 503         }
 504 }
 505
 506 static void
 507 wireless_add_handler(const char *script, const char *name, json_object *obj)
 508 {
 509         struct wireless_driver *drv;
 510         char *name_str, *script_str;
 511         json_object *dev_config_obj, *iface_config_obj;
 512         struct uci_blob_param_list *dev_config, *iface_config;
 513
 514         dev_config_obj = json_get_field(obj, "device", json_type_array);
 515         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 516
 517         if (!dev_config_obj || !iface_config_obj)
 518                 return;
 519
 520         drv = calloc_a(sizeof(*drv),
 521                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 522                 &iface_config, sizeof(*iface_config) + sizeof(void *),
 523                 &name_str, strlen(name) + 1,
 524                 &script_str, strlen(script) + 1);
 525
 526         drv->name = strcpy(name_str, name);
 527         drv->script = strcpy(script_str, script);
 528
 529         dev_config->n_next = 1;
 530         dev_config->next[0] = &wdev_param;
 531         drv->device.config = dev_config;
 532
 533         iface_config->n_next = 1;
 534         iface_config->next[0] = &vif_param;
 535         drv->interface.config = iface_config;
 536
 537         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 538         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 539
 540         drv->node.key = drv->name;
 541         avl_insert(&wireless_drivers, &drv->node);
 542         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 543 }
 544
 545 void wireless_init(void)
 546 {
 547         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 548         wireless_devices.keep_old = true;
 549         wireless_devices.no_delete = true;
 550
 551         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 552         drv_fd = netifd_open_subdir("wireless");
 553         if (drv_fd < 0)
 554                 return;
 555
 556         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 557 }
 558
 559 static void
 560 wireless_interface_init_config(struct wireless_interface *vif)
 561 {
 562         struct blob_attr *tb[__VIF_ATTR_MAX];
 563         struct blob_attr *cur;
 564
 565         vif->network = NULL;
 566         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 567
 568         if ((cur = tb[VIF_ATTR_NETWORK]))
 569                 vif->network = cur;
 570
 571         cur = tb[VIF_ATTR_ISOLATE];
 572         if (cur)
 573                 vif->isolate = blobmsg_get_bool(cur);
 574
 575         cur = tb[VIF_ATTR_MODE];
 576         if (cur)
 577                 vif->ap_mode = !strcmp(blobmsg_get_string(cur), "ap");
 578 }
 579
 580 static void
 581 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 582            struct vlist_node *node_old)
 583 {
 584         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 585         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 586         struct wireless_device *wdev;
 587
 588         if (vif_old)
 589                 wdev = vif_old->wdev;
 590         else
 591                 wdev = vif_new->wdev;
 592
 593         if (vif_old && vif_new) {
 594                 free((void *) vif_old->section);
 595                 vif_old->section = strdup(vif_new->section);
 596                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 597                         free(vif_new);
 598                         return;
 599                 }
 600
 601                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 602                 wireless_interface_handle_link(vif_old, false);
 603                 free(vif_old->config);
 604                 vif_old->config = blob_memdup(vif_new->config);
 605                 vif_old->isolate = vif_new->isolate;
 606                 vif_old->ap_mode = vif_new->ap_mode;
 607                 wireless_interface_init_config(vif_old);
 608                 free(vif_new);
 609         } else if (vif_new) {
 610                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 611                 vif_new->section = strdup(vif_new->section);
 612                 vif_new->config = blob_memdup(vif_new->config);
 613                 wireless_interface_init_config(vif_new);
 614         } else if (vif_old) {
 615                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 616                 free((void *) vif_old->section);
 617                 free(vif_old->config);
 618                 free(vif_old);
 619         }
 620
 621         wdev_set_config_state(wdev, IFC_RELOAD);
 622 }
 623
 624 static void
 625 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 626 {
 627         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 628         char buf[128];
 629
 630         while (1) {
 631                 int b = read(fd->fd, buf, sizeof(buf));
 632                 if (b < 0) {
 633                         if (errno == EINTR)
 634                                 continue;
 635
 636                         if (errno == EAGAIN)
 637                                 return;
 638
 639                         goto done;
 640                 }
 641
 642                 if (!b)
 643                         goto done;
 644         }
 645
 646 done:
 647         uloop_timeout_set(&wdev->script_check, 0);
 648         wireless_close_script_proc_fd(wdev);
 649 }
 650
 651 static void
 652 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 653 {
 654         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 655         struct wireless_process *proc, *tmp;
 656         bool restart = false;
 657
 658         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 659                 if (wireless_process_check(proc))
 660                         continue;
 661
 662                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 663                 if (proc->required)
 664                         restart = true;
 665
 666                 wireless_process_free(wdev, proc);
 667         }
 668
 669         if (restart)
 670                 wireless_device_retry_setup(wdev);
 671         else
 672                 uloop_timeout_set(&wdev->script_check, 1000);
 673 }
 674
 675 void
 676 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 677 {
 678         struct wireless_device *wdev;
 679         char *name_buf;
 680         struct blob_attr *disabled;
 681
 682         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 683
 684         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 685         if (disabled && blobmsg_get_bool(disabled))
 686                 wdev->disabled = true;
 687         wdev->drv = drv;
 688         wdev->state = IFS_DOWN;
 689         wdev->config_state = IFC_NORMAL;
 690         wdev->name = strcpy(name_buf, name);
 691         wdev->config = data;
 692         wdev->retry_setup_failed = false;
 693         wdev->config_autostart = true;
 694         wdev->autostart = wdev->config_autostart;
 695         INIT_LIST_HEAD(&wdev->script_proc);
 696         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 697         wdev->interfaces.keep_old = true;
 698
 699         wdev->timeout.cb = wireless_device_setup_timeout;
 700         wdev->script_task.cb = wireless_device_script_task_cb;
 701         wdev->script_task.dir_fd = drv_fd;
 702         wdev->script_task.log_prefix = wdev->name;
 703
 704         wdev->script_proc_fd.fd = -1;
 705         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 706
 707         wdev->script_check.cb = wireless_device_check_script_tasks;
 708
 709         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 710 }
 711
 712 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 713 {
 714         struct wireless_interface *vif;
 715         struct blob_attr *tb[__VIF_ATTR_MAX];
 716         struct blob_attr *cur;
 717         char *name_buf;
 718         char name[8];
 719
 720         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 721
 722         cur = tb[VIF_ATTR_DISABLED];
 723         if (cur && blobmsg_get_bool(cur))
 724                 return;
 725
 726         sprintf(name, "%d", wdev->vif_idx++);
 727
 728         vif = calloc_a(sizeof(*vif),
 729                        &name_buf, strlen(name) + 1);
 730         vif->name = strcpy(name_buf, name);
 731         vif->wdev = wdev;
 732         vif->config = data;
 733         vif->section = section;
 734         vif->isolate = false;
 735
 736         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 737 }
 738
 739 static void
 740 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 741 {
 742         void *i;
 743
 744         i = blobmsg_open_table(b, NULL);
 745         if (iface->section)
 746                 blobmsg_add_string(b, "section", iface->section);
 747         if (iface->ifname)
 748                 blobmsg_add_string(b, "ifname", iface->ifname);
 749         put_container(b, iface->config, "config");
 750         blobmsg_close_table(b, i);
 751 }
 752
 753 void
 754 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 755 {
 756         struct wireless_interface *iface;
 757         void *c, *i;
 758
 759         c = blobmsg_open_table(b, wdev->name);
 760         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 761         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 762         blobmsg_add_u8(b, "autostart", wdev->autostart);
 763         blobmsg_add_u8(b, "disabled", wdev->disabled);
 764         put_container(b, wdev->config, "config");
 765
 766         i = blobmsg_open_array(b, "interfaces");
 767         vlist_for_each_element(&wdev->interfaces, iface, node)
 768                 wireless_interface_status(iface, b);
 769         blobmsg_close_array(b, i);
 770         blobmsg_close_table(b, c);
 771 }
 772
 773 void
 774 wireless_device_get_validate(struct wireless_device *wdev, struct blob_buf *b)
 775 {
 776         struct uci_blob_param_list *p;
 777         void *c, *d;
 778         int i;
 779
 780         c = blobmsg_open_table(b, wdev->name);
 781
 782         d = blobmsg_open_table(b, "device");
 783         p = wdev->drv->device.config;
 784         for (i = 0; i < p->n_params; i++)
 785                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 786         blobmsg_close_table(b, d);
 787
 788         d = blobmsg_open_table(b, "interface");
 789         p = wdev->drv->interface.config;
 790         for (i = 0; i < p->n_params; i++)
 791                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 792         blobmsg_close_table(b, d);
 793
 794         blobmsg_close_table(b, c);
 795 }
 796
 797 static void
 798 wireless_interface_set_data(struct wireless_interface *vif)
 799 {
 800         enum {
 801                 VIF_DATA_IFNAME,
 802                 __VIF_DATA_MAX,
 803         };
 804         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 805                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 806         };
 807         struct blob_attr *tb[__VIF_DATA_MAX];
 808         struct blob_attr *cur;
 809
 810         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 811                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 812
 813         if ((cur = tb[VIF_DATA_IFNAME]))
 814                 vif->ifname = blobmsg_data(cur);
 815 }
 816
 817 static int
 818 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 819 {
 820         enum {
 821                 PROC_ATTR_PID,
 822                 PROC_ATTR_EXE,
 823                 PROC_ATTR_REQUIRED,
 824                 __PROC_ATTR_MAX
 825         };
 826         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 827                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 828                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 829                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 830         };
 831         struct blob_attr *tb[__PROC_ATTR_MAX];
 832         struct wireless_process *proc;
 833         char *name;
 834         int pid;
 835
 836         if (!data)
 837                 return UBUS_STATUS_INVALID_ARGUMENT;
 838
 839         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 840         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 841                 return UBUS_STATUS_INVALID_ARGUMENT;
 842
 843         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 844         if (pid < 2)
 845                 return UBUS_STATUS_INVALID_ARGUMENT;
 846
 847         proc = calloc_a(sizeof(*proc),
 848                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 849
 850         proc->pid = pid;
 851         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 852
 853         if (tb[PROC_ATTR_REQUIRED])
 854                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 855
 856         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 857         list_add(&proc->list, &wdev->script_proc);
 858         uloop_timeout_set(&wdev->script_check, 0);
 859
 860         return 0;
 861 }
 862
 863 static int
 864 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 865                                  struct ubus_request_data *req)
 866 {
 867         enum {
 868                 KILL_ATTR_SIGNAL,
 869                 KILL_ATTR_IMMEDIATE,
 870                 __KILL_ATTR_MAX
 871         };
 872         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 873                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 874                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 875         };
 876         struct blob_attr *tb[__KILL_ATTR_MAX];
 877         struct blob_attr *cur;
 878         bool immediate = false;
 879         int signal = SIGTERM;
 880
 881         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 882
 883         if ((cur = tb[KILL_ATTR_SIGNAL]))
 884                 signal = blobmsg_get_u32(cur);
 885
 886         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 887                 immediate = blobmsg_get_bool(cur);
 888
 889         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 890                 return UBUS_STATUS_PERMISSION_DENIED;
 891
 892         wireless_process_kill_all(wdev, signal, immediate);
 893
 894         if (list_empty(&wdev->script_proc))
 895                 return 0;
 896
 897         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 898         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 899
 900         return 0;
 901 }
 902
 903 static int
 904 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 905 {
 906         static const struct blobmsg_policy retry_policy = {
 907                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 908         };
 909         struct blob_attr *val;
 910
 911         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 912         if (!val)
 913                 return UBUS_STATUS_INVALID_ARGUMENT;
 914
 915         wdev->retry = blobmsg_get_u32(val);
 916         return 0;
 917 }
 918
 919 enum {
 920         NOTIFY_CMD_UP = 0,
 921         NOTIFY_CMD_SET_DATA = 1,
 922         NOTIFY_CMD_PROCESS_ADD = 2,
 923         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 924         NOTIFY_CMD_SET_RETRY = 4,
 925 };
 926
 927 int
 928 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 929                        struct ubus_request_data *req)
 930 {
 931         enum {
 932                 NOTIFY_ATTR_COMMAND,
 933                 NOTIFY_ATTR_VIF,
 934                 NOTIFY_ATTR_DATA,
 935                 __NOTIFY_MAX,
 936         };
 937         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 938                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 939                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 940                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 941         };
 942         struct wireless_interface *vif = NULL;
 943         struct blob_attr *tb[__NOTIFY_MAX];
 944         struct blob_attr *cur, **pdata;
 945
 946         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 947
 948         if (!tb[NOTIFY_ATTR_COMMAND])
 949                 return UBUS_STATUS_INVALID_ARGUMENT;
 950
 951         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 952                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 953                 if (!vif)
 954                         return UBUS_STATUS_NOT_FOUND;
 955         }
 956
 957         cur = tb[NOTIFY_ATTR_DATA];
 958         if (!cur)
 959                 return UBUS_STATUS_INVALID_ARGUMENT;
 960
 961         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 962         case NOTIFY_CMD_UP:
 963                 if (vif)
 964                         return UBUS_STATUS_INVALID_ARGUMENT;
 965
 966                 if (wdev->state != IFS_SETUP)
 967                         return UBUS_STATUS_PERMISSION_DENIED;
 968
 969                 wireless_device_mark_up(wdev);
 970                 break;
 971         case NOTIFY_CMD_SET_DATA:
 972                 if (vif)
 973                         pdata = &vif->data;
 974                 else
 975                         pdata = &wdev->data;
 976
 977                 if (*pdata)
 978                         return UBUS_STATUS_INVALID_ARGUMENT;
 979
 980                 *pdata = blob_memdup(cur);
 981                 if (vif)
 982                         wireless_interface_set_data(vif);
 983                 break;
 984         case NOTIFY_CMD_PROCESS_ADD:
 985                 return wireless_device_add_process(wdev, cur);
 986         case NOTIFY_CMD_PROCESS_KILL_ALL:
 987                 return wireless_device_process_kill_all(wdev, cur, req);
 988         case NOTIFY_CMD_SET_RETRY:
 989                 return wireless_device_set_retry(wdev, cur);
 990         default:
 991                 return UBUS_STATUS_INVALID_ARGUMENT;
 992         }
 993
 994         return 0;
 995 }
 996
 997 void
 998 wireless_start_pending(void)
 999 {
1000         struct wireless_device *wdev;
1001
1002         vlist_for_each_element(&wireless_devices, wdev, node)
1003                 __wireless_device_set_up(wdev);
1004 }