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 void wireless_init(void)
 495 {
 496         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 497         wireless_devices.keep_old = true;
 498         wireless_devices.no_delete = true;
 499
 500         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 501         drv_fd = netifd_open_subdir("wireless");
 502         if (drv_fd < 0)
 503                 return;
 504
 505         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 506 }
 507
 508 static void
 509 wireless_interface_init_config(struct wireless_interface *vif)
 510 {
 511         struct blob_attr *tb[__VIF_ATTR_MAX];
 512         struct blob_attr *cur;
 513
 514         vif->network = NULL;
 515         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 516
 517         if ((cur = tb[VIF_ATTR_NETWORK]))
 518                 vif->network = cur;
 519 }
 520
 521 static void
 522 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 523            struct vlist_node *node_old)
 524 {
 525         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 526         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 527         struct wireless_device *wdev;
 528
 529         if (vif_old)
 530                 wdev = vif_old->wdev;
 531         else
 532                 wdev = vif_new->wdev;
 533
 534         if (vif_old && vif_new) {
 535                 vif_old->section = vif_new->section;
 536                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 537                         free(vif_new);
 538                         return;
 539                 }
 540
 541                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 542                 free(vif_old->config);
 543                 vif_old->config = blob_memdup(vif_new->config);
 544                 wireless_interface_init_config(vif_old);
 545                 free(vif_new);
 546         } else if (vif_new) {
 547                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 548                 vif_new->config = blob_memdup(vif_new->config);
 549                 wireless_interface_init_config(vif_new);
 550         } else if (vif_old) {
 551                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 552                 free(vif_old->config);
 553                 free(vif_old);
 554         }
 555
 556         wdev_set_config_state(wdev, IFC_RELOAD);
 557 }
 558
 559 static void
 560 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 561 {
 562         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 563         char buf[128];
 564
 565         while (1) {
 566                 int b = read(fd->fd, buf, sizeof(buf));
 567                 if (b < 0) {
 568                         if (errno == EINTR)
 569                                 continue;
 570
 571                         if (errno == EAGAIN)
 572                                 return;
 573
 574                         goto done;
 575                 }
 576
 577                 if (!b)
 578                         goto done;
 579         }
 580
 581 done:
 582         uloop_timeout_set(&wdev->script_check, 0);
 583         wireless_close_script_proc_fd(wdev);
 584 }
 585
 586 static void
 587 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 588 {
 589         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 590         struct wireless_process *proc, *tmp;
 591         bool restart = false;
 592
 593         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 594                 if (wireless_process_check(proc))
 595                         continue;
 596
 597                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 598                 if (proc->required)
 599                         restart = true;
 600
 601                 wireless_process_free(wdev, proc);
 602         }
 603
 604         if (restart)
 605                 wireless_device_retry_setup(wdev);
 606         else
 607                 uloop_timeout_set(&wdev->script_check, 1000);
 608 }
 609
 610 void
 611 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 612 {
 613         struct wireless_device *wdev;
 614         char *name_buf;
 615         struct blob_attr *disabled;
 616
 617         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 618
 619         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 620         if (disabled && blobmsg_get_bool(disabled))
 621                 wdev->disabled = true;
 622         wdev->drv = drv;
 623         wdev->state = IFS_DOWN;
 624         wdev->config_state = IFC_NORMAL;
 625         wdev->name = strcpy(name_buf, name);
 626         wdev->config = data;
 627         wdev->config_autostart = true;
 628         wdev->autostart = wdev->config_autostart;
 629         INIT_LIST_HEAD(&wdev->script_proc);
 630         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 631         wdev->interfaces.keep_old = true;
 632         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 633
 634         wdev->timeout.cb = wireless_device_setup_timeout;
 635         wdev->script_task.cb = wireless_device_script_task_cb;
 636         wdev->script_task.dir_fd = drv_fd;
 637         wdev->script_task.log_prefix = wdev->name;
 638
 639         wdev->script_proc_fd.fd = -1;
 640         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 641
 642         wdev->script_check.cb = wireless_device_check_script_tasks;
 643 }
 644
 645 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 646 {
 647         struct wireless_interface *vif;
 648         struct blob_attr *tb[__VIF_ATTR_MAX];
 649         struct blob_attr *cur;
 650         char *name_buf;
 651         char name[8];
 652
 653         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 654
 655         cur = tb[VIF_ATTR_DISABLED];
 656         if (cur && blobmsg_get_bool(cur))
 657                 return;
 658
 659         sprintf(name, "%d", wdev->vif_idx++);
 660
 661         vif = calloc_a(sizeof(*vif), &name_buf, strlen(name) + 1);
 662         vif->name = strcpy(name_buf, name);
 663         vif->wdev = wdev;
 664         vif->config = data;
 665         vif->section = section;
 666         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 667 }
 668
 669 static void
 670 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 671 {
 672         void *i;
 673
 674         i = blobmsg_open_table(b, NULL);
 675         if (iface->section)
 676                 blobmsg_add_string(b, "section", iface->section);
 677         if (iface->ifname)
 678                 blobmsg_add_string(b, "ifname", iface->ifname);
 679         if (iface->data)
 680                 blob_put_raw(b, blob_data(iface->data), blob_len(iface->data));
 681         blobmsg_close_table(b, i);
 682 }
 683
 684 void
 685 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 686 {
 687         struct wireless_interface *iface;
 688         void *c, *i;
 689
 690         c = blobmsg_open_table(b, wdev->name);
 691         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 692         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 693         blobmsg_add_u8(b, "autostart", wdev->autostart);
 694         blobmsg_add_u8(b, "disabled", wdev->disabled);
 695
 696         i = blobmsg_open_array(b, "interfaces");
 697         vlist_for_each_element(&wdev->interfaces, iface, node)
 698                 wireless_interface_status(iface, b);
 699         blobmsg_close_array(b, i);
 700         blobmsg_close_table(b, c);
 701 }
 702
 703 void
 704 wireless_device_get_validate(struct wireless_device *wdev, struct blob_buf *b)
 705 {
 706         struct uci_blob_param_list *p;
 707         void *c, *d;
 708         int i;
 709
 710         c = blobmsg_open_table(b, wdev->name);
 711
 712         d = blobmsg_open_table(b, "device");
 713         p = wdev->drv->device.config;
 714         for (i = 0; i < p->n_params; i++)
 715                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 716         blobmsg_close_table(b, d);
 717
 718         d = blobmsg_open_table(b, "interface");
 719         p = wdev->drv->interface.config;
 720         for (i = 0; i < p->n_params; i++)
 721                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 722         blobmsg_close_table(b, d);
 723
 724         blobmsg_close_table(b, c);
 725 }
 726
 727 static void
 728 wireless_interface_set_data(struct wireless_interface *vif)
 729 {
 730         enum {
 731                 VIF_DATA_IFNAME,
 732                 __VIF_DATA_MAX,
 733         };
 734         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 735                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 736         };
 737         struct blob_attr *tb[__VIF_DATA_MAX];
 738         struct blob_attr *cur;
 739
 740         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 741                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 742
 743         if ((cur = tb[VIF_DATA_IFNAME]))
 744                 vif->ifname = blobmsg_data(cur);
 745 }
 746
 747 static int
 748 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 749 {
 750         enum {
 751                 PROC_ATTR_PID,
 752                 PROC_ATTR_EXE,
 753                 PROC_ATTR_REQUIRED,
 754                 __PROC_ATTR_MAX
 755         };
 756         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 757                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 758                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 759                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 760         };
 761         struct blob_attr *tb[__PROC_ATTR_MAX];
 762         struct wireless_process *proc;
 763         char *name;
 764         int pid;
 765
 766         if (!data)
 767                 return UBUS_STATUS_INVALID_ARGUMENT;
 768
 769         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 770         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 771                 return UBUS_STATUS_INVALID_ARGUMENT;
 772
 773         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 774         if (pid < 2)
 775                 return UBUS_STATUS_INVALID_ARGUMENT;
 776
 777         proc = calloc_a(sizeof(*proc),
 778                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 779
 780         proc->pid = pid;
 781         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 782
 783         if (tb[PROC_ATTR_REQUIRED])
 784                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 785
 786         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 787         list_add(&proc->list, &wdev->script_proc);
 788         uloop_timeout_set(&wdev->script_check, 0);
 789
 790         return 0;
 791 }
 792
 793 static int
 794 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 795                                  struct ubus_request_data *req)
 796 {
 797         enum {
 798                 KILL_ATTR_SIGNAL,
 799                 KILL_ATTR_IMMEDIATE,
 800                 __KILL_ATTR_MAX
 801         };
 802         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 803                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 804                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 805         };
 806         struct blob_attr *tb[__KILL_ATTR_MAX];
 807         struct blob_attr *cur;
 808         bool immediate = false;
 809         int signal = SIGTERM;
 810
 811         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 812
 813         if ((cur = tb[KILL_ATTR_SIGNAL]))
 814                 signal = blobmsg_get_u32(cur);
 815
 816         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 817                 immediate = blobmsg_get_bool(cur);
 818
 819         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 820                 return UBUS_STATUS_PERMISSION_DENIED;
 821
 822         wireless_process_kill_all(wdev, signal, immediate);
 823
 824         if (list_empty(&wdev->script_proc))
 825                 return 0;
 826
 827         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 828         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 829
 830         return 0;
 831 }
 832
 833 static int
 834 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 835 {
 836         static const struct blobmsg_policy retry_policy = {
 837                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 838         };
 839         struct blob_attr *val;
 840
 841         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 842         if (!val)
 843                 return UBUS_STATUS_INVALID_ARGUMENT;
 844
 845         wdev->retry = blobmsg_get_u32(val);
 846         return 0;
 847 }
 848
 849 enum {
 850         NOTIFY_CMD_UP = 0,
 851         NOTIFY_CMD_SET_DATA = 1,
 852         NOTIFY_CMD_PROCESS_ADD = 2,
 853         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 854         NOTIFY_CMD_SET_RETRY = 4,
 855 };
 856
 857 int
 858 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 859                        struct ubus_request_data *req)
 860 {
 861         enum {
 862                 NOTIFY_ATTR_COMMAND,
 863                 NOTIFY_ATTR_VIF,
 864                 NOTIFY_ATTR_DATA,
 865                 __NOTIFY_MAX,
 866         };
 867         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 868                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 869                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 870                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 871         };
 872         struct wireless_interface *vif = NULL;
 873         struct blob_attr *tb[__NOTIFY_MAX];
 874         struct blob_attr *cur, **pdata;
 875
 876         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 877
 878         if (!tb[NOTIFY_ATTR_COMMAND])
 879                 return UBUS_STATUS_INVALID_ARGUMENT;
 880
 881         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 882                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 883                 if (!vif)
 884                         return UBUS_STATUS_NOT_FOUND;
 885         }
 886
 887         cur = tb[NOTIFY_ATTR_DATA];
 888         if (!cur)
 889                 return UBUS_STATUS_INVALID_ARGUMENT;
 890
 891         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 892         case NOTIFY_CMD_UP:
 893                 if (vif)
 894                         return UBUS_STATUS_INVALID_ARGUMENT;
 895
 896                 if (wdev->state != IFS_SETUP)
 897                         return UBUS_STATUS_PERMISSION_DENIED;
 898
 899                 if (wdev->cancel)
 900                         return 0;
 901
 902                 wireless_device_mark_up(wdev);
 903                 break;
 904         case NOTIFY_CMD_SET_DATA:
 905                 if (vif)
 906                         pdata = &vif->data;
 907                 else
 908                         pdata = &wdev->data;
 909
 910                 if (*pdata)
 911                         return UBUS_STATUS_INVALID_ARGUMENT;
 912
 913                 *pdata = blob_memdup(cur);
 914                 if (vif)
 915                         wireless_interface_set_data(vif);
 916                 break;
 917         case NOTIFY_CMD_PROCESS_ADD:
 918                 return wireless_device_add_process(wdev, cur);
 919         case NOTIFY_CMD_PROCESS_KILL_ALL:
 920                 return wireless_device_process_kill_all(wdev, cur, req);
 921         case NOTIFY_CMD_SET_RETRY:
 922                 return wireless_device_set_retry(wdev, cur);
 923         default:
 924                 return UBUS_STATUS_INVALID_ARGUMENT;
 925         }
 926
 927         return 0;
 928 }
 929
 930 void
 931 wireless_start_pending(void)
 932 {
 933         struct wireless_device *wdev;
 934
 935         vlist_for_each_element(&wireless_devices, wdev, node)
 936                 if (wdev->autostart)
 937                         __wireless_device_set_up(wdev);
 938 }