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->script_check);
 184         uloop_timeout_cancel(&wdev->timeout);
 185         wireless_complete_kill_request(wdev);
 186         free(wdev->data);
 187         wdev->data = NULL;
 188         vlist_for_each_element(&wdev->interfaces, vif, node) {
 189                 free(vif->data);
 190                 vif->data = NULL;
 191                 vif->ifname = NULL;
 192         }
 193 }
 194
 195 static void wireless_interface_handle_link(struct wireless_interface *vif, bool up)
 196 {
 197         struct interface *iface;
 198         struct blob_attr *cur;
 199         const char *network;
 200         int rem;
 201
 202         if (!vif->network || !vif->ifname)
 203                 return;
 204
 205         blobmsg_for_each_attr(cur, vif->network, rem) {
 206                 network = blobmsg_data(cur);
 207
 208                 iface = vlist_find(&interfaces, network, iface, node);
 209                 if (!iface)
 210                         continue;
 211
 212                 interface_handle_link(iface, vif->ifname, up);
 213         }
 214 }
 215
 216 static void
 217 wireless_device_setup_cancel(struct wireless_device *wdev)
 218 {
 219         if (wdev->cancel)
 220                 return;
 221
 222         D(WIRELESS, "Cancel wireless device '%s' setup\n", wdev->name);
 223         wdev->cancel = true;
 224         uloop_timeout_set(&wdev->timeout, 10 * 1000);
 225 }
 226
 227 static void
 228 wireless_device_run_handler(struct wireless_device *wdev, bool up)
 229 {
 230         const char *action = up ? "setup" : "teardown";
 231         const char *argv[6];
 232         char *config;
 233         int i = 0;
 234         int fds[2] = { -1, -1 };
 235
 236         D(WIRELESS, "Wireless device '%s' run %s handler\n", wdev->name, action);
 237         prepare_config(wdev, &b, up);
 238         config = blobmsg_format_json(b.head, true);
 239
 240         argv[i++] = wdev->drv->script;
 241         argv[i++] = wdev->drv->name;
 242         argv[i++] = action;
 243         argv[i++] = wdev->name;
 244         argv[i++] = config;
 245         argv[i] = NULL;
 246
 247         if (up && pipe(fds) == 0) {
 248                 wdev->script_proc_fd.fd = fds[0];
 249                 uloop_fd_add(&wdev->script_proc_fd,
 250                              ULOOP_READ | ULOOP_EDGE_TRIGGER);
 251         }
 252
 253         netifd_start_process(argv, NULL, &wdev->script_task);
 254
 255         if (fds[1] >= 0)
 256                 close(fds[1]);
 257
 258         free(config);
 259 }
 260
 261 static void
 262 __wireless_device_set_up(struct wireless_device *wdev)
 263 {
 264         if (wdev->disabled)
 265                 return;
 266
 267         if (wdev->state != IFS_DOWN || config_init)
 268                 return;
 269
 270         wdev->state = IFS_SETUP;
 271         wireless_device_run_handler(wdev, true);
 272 }
 273
 274 static void
 275 wireless_device_free(struct wireless_device *wdev)
 276 {
 277         vlist_flush_all(&wdev->interfaces);
 278         avl_delete(&wireless_devices.avl, &wdev->node.avl);
 279         free(wdev->config);
 280         free(wdev);
 281 }
 282
 283 static void
 284 wdev_handle_config_change(struct wireless_device *wdev)
 285 {
 286         enum interface_config_state state = wdev->config_state;
 287
 288         switch(state) {
 289         case IFC_NORMAL:
 290         case IFC_RELOAD:
 291                 wdev->config_state = IFC_NORMAL;
 292                 if (wdev->autostart)
 293                         __wireless_device_set_up(wdev);
 294                 break;
 295         case IFC_REMOVE:
 296                 wireless_device_free(wdev);
 297                 break;
 298         }
 299 }
 300
 301 static void
 302 wireless_device_mark_down(struct wireless_device *wdev)
 303 {
 304         struct wireless_interface *vif;
 305
 306         D(WIRELESS, "Wireless device '%s' is now down\n", wdev->name);
 307
 308         vlist_for_each_element(&wdev->interfaces, vif, node)
 309                 wireless_interface_handle_link(vif, false);
 310
 311         wireless_process_kill_all(wdev, SIGTERM, true);
 312
 313         wdev->cancel = false;
 314         wdev->state = IFS_DOWN;
 315         wireless_device_free_state(wdev);
 316         wdev_handle_config_change(wdev);
 317 }
 318
 319 static void
 320 wireless_device_mark_up(struct wireless_device *wdev)
 321 {
 322         struct wireless_interface *vif;
 323
 324         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 325         wdev->state = IFS_UP;
 326         vlist_for_each_element(&wdev->interfaces, vif, node)
 327                 wireless_interface_handle_link(vif, true);
 328 }
 329
 330 static void
 331 wireless_device_setup_timeout(struct uloop_timeout *timeout)
 332 {
 333         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 334
 335         netifd_kill_process(&wdev->script_task);
 336         wdev->script_task.cb(&wdev->script_task, -1);
 337         wireless_device_mark_down(wdev);
 338 }
 339
 340 void
 341 wireless_device_set_up(struct wireless_device *wdev)
 342 {
 343         wdev->retry = WIRELESS_SETUP_RETRY;
 344         wdev->autostart = true;
 345         __wireless_device_set_up(wdev);
 346 }
 347
 348 static void
 349 __wireless_device_set_down(struct wireless_device *wdev)
 350 {
 351         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 352                 return;
 353
 354         if (wdev->script_task.uloop.pending) {
 355                 wireless_device_setup_cancel(wdev);
 356                 return;
 357         }
 358
 359         wdev->state = IFS_TEARDOWN;
 360         wireless_device_run_handler(wdev, false);
 361 }
 362
 363 static void
 364 wireless_device_retry_setup(struct wireless_device *wdev)
 365 {
 366         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN || wdev->cancel)
 367                 return;
 368
 369         if (--wdev->retry < 0)
 370                 wdev->autostart = false;
 371
 372         __wireless_device_set_down(wdev);
 373 }
 374
 375 static void
 376 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 377 {
 378         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 379
 380         switch (wdev->state) {
 381         case IFS_SETUP:
 382                 wireless_device_retry_setup(wdev);
 383                 break;
 384         case IFS_TEARDOWN:
 385                 wireless_device_mark_down(wdev);
 386                 break;
 387         default:
 388                 break;
 389         }
 390 }
 391
 392 void
 393 wireless_device_set_down(struct wireless_device *wdev)
 394 {
 395         wdev->autostart = false;
 396         __wireless_device_set_down(wdev);
 397 }
 398
 399 static void
 400 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 401 {
 402         if (wdev->config_state != IFC_NORMAL)
 403                 return;
 404
 405         wdev->config_state = s;
 406         if (wdev->state == IFS_DOWN)
 407                 wdev_handle_config_change(wdev);
 408         else
 409                 __wireless_device_set_down(wdev);
 410 }
 411
 412 static void
 413 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 414 {
 415         struct blob_attr *new_config = wd_new->config;
 416         bool disabled = wd_new->disabled;
 417
 418         free(wd_new);
 419
 420         if (blob_attr_equal(wdev->config, new_config) || wdev->disabled == disabled)
 421                 return;
 422
 423         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 424         free(wdev->config);
 425         wdev->config = blob_memdup(new_config);
 426         wdev->disabled = disabled;
 427         wdev_set_config_state(wdev, IFC_RELOAD);
 428 }
 429
 430 static void
 431 wdev_create(struct wireless_device *wdev)
 432 {
 433         wdev->retry = WIRELESS_SETUP_RETRY;
 434         wdev->config = blob_memdup(wdev->config);
 435 }
 436
 437 static void
 438 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 439             struct vlist_node *node_old)
 440 {
 441         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 442         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 443
 444         if (wd_old && wd_new) {
 445                 wdev_change_config(wd_old, wd_new);
 446         } else if (wd_old) {
 447                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 448                 wdev_set_config_state(wd_old, IFC_REMOVE);
 449         } else if (wd_new) {
 450                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 451                 wdev_create(wd_new);
 452         }
 453 }
 454
 455 static void
 456 wireless_add_handler(const char *script, const char *name, json_object *obj)
 457 {
 458         struct wireless_driver *drv;
 459         char *name_str, *script_str;
 460         json_object *dev_config_obj, *iface_config_obj;
 461         struct uci_blob_param_list *dev_config, *iface_config;
 462
 463         dev_config_obj = json_get_field(obj, "device", json_type_array);
 464         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 465
 466         if (!dev_config_obj || !iface_config_obj)
 467                 return;
 468
 469         drv = calloc_a(sizeof(*drv),
 470                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 471                 &iface_config, sizeof(*iface_config) + sizeof(void *),
 472                 &name_str, strlen(name) + 1,
 473                 &script_str, strlen(script) + 1);
 474
 475         drv->name = strcpy(name_str, name);
 476         drv->script = strcpy(script_str, script);
 477
 478         dev_config->n_next = 1;
 479         dev_config->next[0] = &wdev_param;
 480         drv->device.config = dev_config;
 481
 482         iface_config->n_next = 1;
 483         iface_config->next[0] = &vif_param;
 484         drv->interface.config = iface_config;
 485
 486         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 487         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 488
 489         drv->node.key = drv->name;
 490         avl_insert(&wireless_drivers, &drv->node);
 491         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 492 }
 493
 494 static void __init
 495 wireless_init_list(void)
 496 {
 497         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 498         wireless_devices.keep_old = true;
 499         wireless_devices.no_delete = true;
 500
 501         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 502         drv_fd = netifd_open_subdir("wireless");
 503         if (drv_fd < 0)
 504                 return;
 505
 506         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 507 }
 508
 509 static void
 510 wireless_interface_init_config(struct wireless_interface *vif)
 511 {
 512         struct blob_attr *tb[__VIF_ATTR_MAX];
 513         struct blob_attr *cur;
 514
 515         vif->network = NULL;
 516         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 517
 518         if ((cur = tb[VIF_ATTR_NETWORK]))
 519                 vif->network = cur;
 520 }
 521
 522 static void
 523 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 524            struct vlist_node *node_old)
 525 {
 526         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 527         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 528         struct wireless_device *wdev;
 529
 530         if (vif_old)
 531                 wdev = vif_old->wdev;
 532         else
 533                 wdev = vif_new->wdev;
 534
 535         if (vif_old && vif_new) {
 536                 vif_old->section = vif_new->section;
 537                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 538                         free(vif_new);
 539                         return;
 540                 }
 541
 542                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 543                 free(vif_old->config);
 544                 vif_old->config = blob_memdup(vif_new->config);
 545                 wireless_interface_init_config(vif_old);
 546                 free(vif_new);
 547         } else if (vif_new) {
 548                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 549                 vif_new->config = blob_memdup(vif_new->config);
 550                 wireless_interface_init_config(vif_new);
 551         } else if (vif_old) {
 552                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 553                 free(vif_old->config);
 554                 free(vif_old);
 555         }
 556
 557         wdev_set_config_state(wdev, IFC_RELOAD);
 558 }
 559
 560 static void
 561 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 562 {
 563         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 564         char buf[128];
 565
 566         while (1) {
 567                 int b = read(fd->fd, buf, sizeof(buf));
 568                 if (b < 0) {
 569                         if (errno == EINTR)
 570                                 continue;
 571
 572                         if (errno == EAGAIN)
 573                                 return;
 574
 575                         goto done;
 576                 }
 577
 578                 if (!b)
 579                         goto done;
 580         }
 581
 582 done:
 583         uloop_timeout_set(&wdev->script_check, 0);
 584         wireless_close_script_proc_fd(wdev);
 585 }
 586
 587 static void
 588 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 589 {
 590         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 591         struct wireless_process *proc, *tmp;
 592         bool restart = false;
 593
 594         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 595                 if (wireless_process_check(proc))
 596                         continue;
 597
 598                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 599                 if (proc->required)
 600                         restart = true;
 601
 602                 wireless_process_free(wdev, proc);
 603         }
 604
 605         if (restart)
 606                 wireless_device_retry_setup(wdev);
 607         else
 608                 uloop_timeout_set(&wdev->script_check, 1000);
 609 }
 610
 611 void
 612 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 613 {
 614         struct wireless_device *wdev;
 615         char *name_buf;
 616         struct blob_attr *disabled;
 617
 618         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 619
 620         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 621         if (disabled && blobmsg_get_bool(disabled))
 622                 wdev->disabled = true;
 623         wdev->drv = drv;
 624         wdev->state = IFS_DOWN;
 625         wdev->config_state = IFC_NORMAL;
 626         wdev->name = strcpy(name_buf, name);
 627         wdev->config = data;
 628         wdev->config_autostart = true;
 629         wdev->autostart = wdev->config_autostart;
 630         INIT_LIST_HEAD(&wdev->script_proc);
 631         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 632         wdev->interfaces.keep_old = true;
 633         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 634
 635         wdev->timeout.cb = wireless_device_setup_timeout;
 636         wdev->script_task.cb = wireless_device_script_task_cb;
 637         wdev->script_task.dir_fd = drv_fd;
 638         wdev->script_task.log_prefix = wdev->name;
 639
 640         wdev->script_proc_fd.fd = -1;
 641         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 642
 643         wdev->script_check.cb = wireless_device_check_script_tasks;
 644 }
 645
 646 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 647 {
 648         struct wireless_interface *vif;
 649         struct blob_attr *tb[__VIF_ATTR_MAX];
 650         struct blob_attr *cur;
 651         char *name_buf;
 652         char name[8];
 653
 654         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 655
 656         cur = tb[VIF_ATTR_DISABLED];
 657         if (cur && blobmsg_get_bool(cur))
 658                 return;
 659
 660         sprintf(name, "%d", wdev->vif_idx++);
 661
 662         vif = calloc_a(sizeof(*vif), &name_buf, strlen(name) + 1);
 663         vif->name = strcpy(name_buf, name);
 664         vif->wdev = wdev;
 665         vif->config = data;
 666         vif->section = section;
 667         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 668 }
 669
 670 static void
 671 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 672 {
 673         void *i;
 674
 675         i = blobmsg_open_table(b, NULL);
 676         if (iface->section)
 677                 blobmsg_add_string(b, "section", iface->section);
 678         if (iface->ifname)
 679                 blobmsg_add_string(b, "ifname", iface->ifname);
 680         if (iface->data)
 681                 blob_put_raw(b, blob_data(iface->data), blob_len(iface->data));
 682         blobmsg_close_table(b, i);
 683 }
 684
 685 void
 686 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 687 {
 688         struct wireless_interface *iface;
 689         void *c, *i;
 690
 691         c = blobmsg_open_table(b, wdev->name);
 692         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 693         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 694         blobmsg_add_u8(b, "autostart", wdev->autostart);
 695         blobmsg_add_u8(b, "disabled", wdev->disabled);
 696
 697         i = blobmsg_open_array(b, "interfaces");
 698         vlist_for_each_element(&wdev->interfaces, iface, node)
 699                 wireless_interface_status(iface, b);
 700         blobmsg_close_array(b, i);
 701         blobmsg_close_table(b, c);
 702 }
 703
 704 static void
 705 wireless_interface_set_data(struct wireless_interface *vif)
 706 {
 707         enum {
 708                 VIF_DATA_IFNAME,
 709                 __VIF_DATA_MAX,
 710         };
 711         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 712                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 713         };
 714         struct blob_attr *tb[__VIF_DATA_MAX];
 715         struct blob_attr *cur;
 716
 717         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 718                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 719
 720         if ((cur = tb[VIF_DATA_IFNAME]))
 721                 vif->ifname = blobmsg_data(cur);
 722 }
 723
 724 static int
 725 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 726 {
 727         enum {
 728                 PROC_ATTR_PID,
 729                 PROC_ATTR_EXE,
 730                 PROC_ATTR_REQUIRED,
 731                 __PROC_ATTR_MAX
 732         };
 733         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 734                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 735                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 736                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 737         };
 738         struct blob_attr *tb[__PROC_ATTR_MAX];
 739         struct wireless_process *proc;
 740         char *name;
 741         int pid;
 742
 743         if (!data)
 744                 return UBUS_STATUS_INVALID_ARGUMENT;
 745
 746         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 747         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 748                 return UBUS_STATUS_INVALID_ARGUMENT;
 749
 750         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 751         if (pid < 2)
 752                 return UBUS_STATUS_INVALID_ARGUMENT;
 753
 754         proc = calloc_a(sizeof(*proc),
 755                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 756
 757         proc->pid = pid;
 758         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 759
 760         if (tb[PROC_ATTR_REQUIRED])
 761                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 762
 763         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 764         list_add(&proc->list, &wdev->script_proc);
 765         uloop_timeout_set(&wdev->script_check, 0);
 766
 767         return 0;
 768 }
 769
 770 static int
 771 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 772                                  struct ubus_request_data *req)
 773 {
 774         enum {
 775                 KILL_ATTR_SIGNAL,
 776                 KILL_ATTR_IMMEDIATE,
 777                 __KILL_ATTR_MAX
 778         };
 779         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 780                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 781                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 782         };
 783         struct blob_attr *tb[__KILL_ATTR_MAX];
 784         struct blob_attr *cur;
 785         bool immediate = false;
 786         int signal = SIGTERM;
 787
 788         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 789
 790         if ((cur = tb[KILL_ATTR_SIGNAL]))
 791                 signal = blobmsg_get_u32(cur);
 792
 793         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 794                 immediate = blobmsg_get_bool(cur);
 795
 796         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 797                 return UBUS_STATUS_PERMISSION_DENIED;
 798
 799         wireless_process_kill_all(wdev, signal, immediate);
 800
 801         if (list_empty(&wdev->script_proc))
 802                 return 0;
 803
 804         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 805         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 806
 807         return 0;
 808 }
 809
 810 static int
 811 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 812 {
 813         static const struct blobmsg_policy retry_policy = {
 814                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 815         };
 816         struct blob_attr *val;
 817
 818         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 819         if (!val)
 820                 return UBUS_STATUS_INVALID_ARGUMENT;
 821
 822         wdev->retry = blobmsg_get_u32(val);
 823         return 0;
 824 }
 825
 826 enum {
 827         NOTIFY_CMD_UP = 0,
 828         NOTIFY_CMD_SET_DATA = 1,
 829         NOTIFY_CMD_PROCESS_ADD = 2,
 830         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 831         NOTIFY_CMD_SET_RETRY = 4,
 832 };
 833
 834 int
 835 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 836                        struct ubus_request_data *req)
 837 {
 838         enum {
 839                 NOTIFY_ATTR_COMMAND,
 840                 NOTIFY_ATTR_VIF,
 841                 NOTIFY_ATTR_DATA,
 842                 __NOTIFY_MAX,
 843         };
 844         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 845                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 846                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 847                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 848         };
 849         struct wireless_interface *vif = NULL;
 850         struct blob_attr *tb[__NOTIFY_MAX];
 851         struct blob_attr *cur, **pdata;
 852
 853         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 854
 855         if (!tb[NOTIFY_ATTR_COMMAND])
 856                 return UBUS_STATUS_INVALID_ARGUMENT;
 857
 858         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 859                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 860                 if (!vif)
 861                         return UBUS_STATUS_NOT_FOUND;
 862         }
 863
 864         cur = tb[NOTIFY_ATTR_DATA];
 865         if (!cur)
 866                 return UBUS_STATUS_INVALID_ARGUMENT;
 867
 868         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 869         case NOTIFY_CMD_UP:
 870                 if (vif)
 871                         return UBUS_STATUS_INVALID_ARGUMENT;
 872
 873                 if (wdev->state != IFS_SETUP)
 874                         return UBUS_STATUS_PERMISSION_DENIED;
 875
 876                 if (wdev->cancel)
 877                         return 0;
 878
 879                 wireless_device_mark_up(wdev);
 880                 break;
 881         case NOTIFY_CMD_SET_DATA:
 882                 if (vif)
 883                         pdata = &vif->data;
 884                 else
 885                         pdata = &wdev->data;
 886
 887                 if (*pdata)
 888                         return UBUS_STATUS_INVALID_ARGUMENT;
 889
 890                 *pdata = blob_memdup(cur);
 891                 if (vif)
 892                         wireless_interface_set_data(vif);
 893                 break;
 894         case NOTIFY_CMD_PROCESS_ADD:
 895                 return wireless_device_add_process(wdev, cur);
 896         case NOTIFY_CMD_PROCESS_KILL_ALL:
 897                 return wireless_device_process_kill_all(wdev, cur, req);
 898         case NOTIFY_CMD_SET_RETRY:
 899                 return wireless_device_set_retry(wdev, cur);
 900         default:
 901                 return UBUS_STATUS_INVALID_ARGUMENT;
 902         }
 903
 904         return 0;
 905 }
 906
 907 void
 908 wireless_start_pending(void)
 909 {
 910         struct wireless_device *wdev;
 911
 912         vlist_for_each_element(&wireless_devices, wdev, node)
 913                 if (wdev->autostart)
 914                         __wireless_device_set_up(wdev);
 915 }