wireless.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include <signal.h>
  15 #include "netifd.h"
  16 #include "wireless.h"
  17 #include "handler.h"
  18 #include "ubus.h"
  19
  20 #define WIRELESS_SETUP_RETRY    3
  21
  22 struct vlist_tree wireless_devices;
  23 struct avl_tree wireless_drivers;
  24 static struct blob_buf b;
  25 static int drv_fd;
  26
  27 static const struct blobmsg_policy wdev_policy =
  28         { .name = "disabled", .type = BLOBMSG_TYPE_BOOL };
  29
  30 static const struct uci_blob_param_list wdev_param = {
  31         .n_params = 1,
  32         .params = &wdev_policy,
  33 };
  34
  35 enum {
  36         VIF_ATTR_DISABLED,
  37         VIF_ATTR_NETWORK,
  38         __VIF_ATTR_MAX,
  39 };
  40
  41 static const struct blobmsg_policy vif_policy[__VIF_ATTR_MAX] = {
  42         [VIF_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
  43         [VIF_ATTR_NETWORK] = { .name = "network", .type = BLOBMSG_TYPE_ARRAY },
  44 };
  45
  46 static const struct uci_blob_param_list vif_param = {
  47         .n_params = ARRAY_SIZE(vif_policy),
  48         .params = vif_policy,
  49 };
  50
  51 static void
  52 put_container(struct blob_buf *buf, struct blob_attr *attr, const char *name)
  53 {
  54         void *c = blobmsg_open_table(&b, name);
  55         blob_put_raw(&b, blob_data(attr), blob_len(attr));
  56         blobmsg_close_table(&b, c);
  57 }
  58
  59 static void
  60 vif_config_add_bridge(struct blob_buf *buf, struct blob_attr *networks, bool prepare)
  61 {
  62         struct interface *iface;
  63         struct device *dev = NULL;
  64         struct blob_attr *cur;
  65         const char *network;
  66         int rem;
  67
  68         if (!networks)
  69                 return;
  70
  71         blobmsg_for_each_attr(cur, networks, rem) {
  72                 network = blobmsg_data(cur);
  73
  74                 iface = vlist_find(&interfaces, network, iface, node);
  75                 if (!iface)
  76                         continue;
  77
  78                 dev = iface->main_dev.dev;
  79                 if (!dev)
  80                         return;
  81
  82                 if (dev->type != &bridge_device_type)
  83                         return;
  84         }
  85
  86         if (!dev)
  87                 return;
  88
  89         if (dev->hotplug_ops && dev->hotplug_ops->prepare)
  90                 dev->hotplug_ops->prepare(dev);
  91
  92         blobmsg_add_string(buf, "bridge", dev->ifname);
  93 }
  94
  95 static void
  96 prepare_config(struct wireless_device *wdev, struct blob_buf *buf, bool up)
  97 {
  98         struct wireless_interface *vif;
  99         void *l, *i;
 100
 101         blob_buf_init(&b, 0);
 102         put_container(&b, wdev->config, "config");
 103         if (wdev->data)
 104                 blobmsg_add_blob(&b, wdev->data);
 105
 106         l = blobmsg_open_table(&b, "interfaces");
 107         vlist_for_each_element(&wdev->interfaces, vif, node) {
 108                 i = blobmsg_open_table(&b, vif->name);
 109                 vif_config_add_bridge(&b, vif->network, up);
 110                 put_container(&b, vif->config, "config");
 111                 if (vif->data)
 112                         blobmsg_add_blob(&b, vif->data);
 113                 blobmsg_close_table(&b, i);
 114         }
 115         blobmsg_close_table(&b, l);
 116 }
 117
 118 static bool
 119 wireless_process_check(struct wireless_process *proc)
 120 {
 121         return check_pid_path(proc->pid, proc->exe);
 122 }
 123
 124 static void
 125 wireless_complete_kill_request(struct wireless_device *wdev)
 126 {
 127         if (!wdev->kill_request)
 128                 return;
 129
 130         ubus_complete_deferred_request(ubus_ctx, wdev->kill_request, 0);
 131         free(wdev->kill_request);
 132         wdev->kill_request = NULL;
 133 }
 134
 135 static void
 136 wireless_process_free(struct wireless_device *wdev, struct wireless_process *proc)
 137 {
 138         D(WIRELESS, "Wireless device '%s' free pid %d\n", wdev->name, proc->pid);
 139         list_del(&proc->list);
 140         free(proc);
 141
 142         if (list_empty(&wdev->script_proc))
 143                 wireless_complete_kill_request(wdev);
 144 }
 145
 146 static void
 147 wireless_close_script_proc_fd(struct wireless_device *wdev)
 148 {
 149         if (wdev->script_proc_fd.fd < 0)
 150                 return;
 151
 152         uloop_fd_delete(&wdev->script_proc_fd);
 153         close(wdev->script_proc_fd.fd);
 154         wdev->script_proc_fd.fd = -1;
 155 }
 156
 157 static void
 158 wireless_process_kill_all(struct wireless_device *wdev, int signal, bool free)
 159 {
 160         struct wireless_process *proc, *tmp;
 161
 162         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 163                 bool check = wireless_process_check(proc);
 164
 165                 if (check) {
 166                         D(WIRELESS, "Wireless device '%s' kill pid %d\n", wdev->name, proc->pid);
 167                         kill(proc->pid, signal);
 168                 }
 169
 170                 if (free || !check)
 171                         wireless_process_free(wdev, proc);
 172         }
 173
 174         if (free)
 175                 wireless_close_script_proc_fd(wdev);
 176 }
 177
 178 static void
 179 wireless_device_free_state(struct wireless_device *wdev)
 180 {
 181         struct wireless_interface *vif;
 182
 183         uloop_timeout_cancel(&wdev->timeout);
 184         wireless_complete_kill_request(wdev);
 185         free(wdev->data);
 186         wdev->data = NULL;
 187         vlist_for_each_element(&wdev->interfaces, vif, node) {
 188                 free(vif->data);
 189                 vif->data = NULL;
 190                 vif->ifname = NULL;
 191         }
 192 }
 193
 194 static void wireless_interface_handle_link(struct wireless_interface *vif, bool up)
 195 {
 196         struct interface *iface;
 197         struct blob_attr *cur;
 198         const char *network;
 199         int rem;
 200
 201         if (!vif->network || !vif->ifname)
 202                 return;
 203
 204         blobmsg_for_each_attr(cur, vif->network, rem) {
 205                 network = blobmsg_data(cur);
 206
 207                 iface = vlist_find(&interfaces, network, iface, node);
 208                 if (!iface)
 209                         continue;
 210
 211                 interface_handle_link(iface, vif->ifname, up);
 212         }
 213 }
 214
 215 static void
 216 wireless_device_setup_cancel(struct wireless_device *wdev)
 217 {
 218         if (wdev->cancel)
 219                 return;
 220
 221         D(WIRELESS, "Cancel wireless device '%s' setup\n", wdev->name);
 222         wdev->cancel = true;
 223         uloop_timeout_set(&wdev->timeout, 10 * 1000);
 224 }
 225
 226 static void
 227 wireless_device_run_handler(struct wireless_device *wdev, bool up)
 228 {
 229         const char *action = up ? "setup" : "teardown";
 230         const char *argv[6];
 231         char *config;
 232         int i = 0;
 233         int fds[2] = { -1, -1 };
 234
 235         D(WIRELESS, "Wireless device '%s' run %s handler\n", wdev->name, action);
 236         prepare_config(wdev, &b, up);
 237         config = blobmsg_format_json(b.head, true);
 238
 239         argv[i++] = wdev->drv->script;
 240         argv[i++] = wdev->drv->name;
 241         argv[i++] = action;
 242         argv[i++] = wdev->name;
 243         argv[i++] = config;
 244         argv[i] = NULL;
 245
 246         if (up && pipe(fds) == 0) {
 247                 wdev->script_proc_fd.fd = fds[0];
 248                 uloop_fd_add(&wdev->script_proc_fd,
 249                              ULOOP_READ | ULOOP_EDGE_TRIGGER);
 250         }
 251
 252         netifd_start_process(argv, NULL, &wdev->script_task);
 253
 254         if (fds[1] >= 0)
 255                 close(fds[1]);
 256
 257         free(config);
 258 }
 259
 260 static void
 261 __wireless_device_set_up(struct wireless_device *wdev)
 262 {
 263         if (wdev->state != IFS_DOWN || config_init)
 264                 return;
 265
 266         wdev->state = IFS_SETUP;
 267         wireless_device_run_handler(wdev, true);
 268 }
 269
 270 static void
 271 wireless_device_free(struct wireless_device *wdev)
 272 {
 273     vlist_flush_all(&wdev->interfaces);
 274     free(wdev->config);
 275     free(wdev);
 276 }
 277
 278 static void
 279 wdev_handle_config_change(struct wireless_device *wdev)
 280 {
 281         enum interface_config_state state = wdev->config_state;
 282
 283         wdev->config_state = IFC_NORMAL;
 284         switch(state) {
 285         case IFC_NORMAL:
 286         case IFC_RELOAD:
 287                 if (wdev->autostart)
 288                         __wireless_device_set_up(wdev);
 289                 break;
 290         case IFC_REMOVE:
 291                 wireless_device_free(wdev);
 292                 break;
 293         }
 294 }
 295
 296 static void
 297 wireless_device_mark_down(struct wireless_device *wdev)
 298 {
 299         struct wireless_interface *vif;
 300
 301         D(WIRELESS, "Wireless device '%s' is now down\n", wdev->name);
 302
 303         vlist_for_each_element(&wdev->interfaces, vif, node)
 304                 wireless_interface_handle_link(vif, false);
 305
 306         wireless_process_kill_all(wdev, SIGTERM, true);
 307
 308         wdev->cancel = false;
 309         wdev->state = IFS_DOWN;
 310         wireless_device_free_state(wdev);
 311         wdev_handle_config_change(wdev);
 312 }
 313
 314 static void
 315 wireless_device_mark_up(struct wireless_device *wdev)
 316 {
 317         struct wireless_interface *vif;
 318
 319         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 320         wdev->state = IFS_UP;
 321         vlist_for_each_element(&wdev->interfaces, vif, node)
 322                 wireless_interface_handle_link(vif, true);
 323 }
 324
 325 static void
 326 wireless_device_setup_timeout(struct uloop_timeout *timeout)
 327 {
 328         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 329
 330         netifd_kill_process(&wdev->script_task);
 331         wdev->script_task.cb(&wdev->script_task, -1);
 332         wireless_device_mark_down(wdev);
 333 }
 334
 335 void
 336 wireless_device_set_up(struct wireless_device *wdev)
 337 {
 338         wdev->retry = WIRELESS_SETUP_RETRY;
 339         wdev->autostart = true;
 340         __wireless_device_set_up(wdev);
 341 }
 342
 343 static void
 344 __wireless_device_set_down(struct wireless_device *wdev)
 345 {
 346         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 347                 return;
 348
 349         if (wdev->script_task.uloop.pending) {
 350                 wireless_device_setup_cancel(wdev);
 351                 return;
 352         }
 353
 354         wdev->state = IFS_TEARDOWN;
 355         wireless_device_run_handler(wdev, false);
 356 }
 357
 358 static void
 359 wireless_device_retry_setup(struct wireless_device *wdev)
 360 {
 361         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN || wdev->cancel)
 362                 return;
 363
 364         if (--wdev->retry < 0)
 365                 wdev->autostart = false;
 366
 367         __wireless_device_set_down(wdev);
 368 }
 369
 370 static void
 371 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 372 {
 373         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 374
 375         switch (wdev->state) {
 376         case IFS_SETUP:
 377                 wireless_device_retry_setup(wdev);
 378                 break;
 379         case IFS_TEARDOWN:
 380                 wireless_device_mark_down(wdev);
 381                 break;
 382         default:
 383                 break;
 384         }
 385 }
 386
 387 void
 388 wireless_device_set_down(struct wireless_device *wdev)
 389 {
 390         wdev->autostart = false;
 391         __wireless_device_set_down(wdev);
 392 }
 393
 394 static void
 395 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 396 {
 397         enum interface_config_state old_state = wdev->config_state;
 398
 399         wdev->config_state = s;
 400         if (old_state != IFC_NORMAL)
 401                 return;
 402
 403         if (wdev->state == IFS_DOWN)
 404                 wdev_handle_config_change(wdev);
 405         else
 406                 __wireless_device_set_down(wdev);
 407 }
 408
 409 static void
 410 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 411 {
 412         struct blob_attr *new_config = wd_new->config;
 413
 414         free(wd_new);
 415
 416         if (blob_attr_equal(wdev->config, new_config))
 417                 return;
 418
 419         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 420         free(wdev->config);
 421         wdev->config = blob_memdup(new_config);
 422         wdev_set_config_state(wdev, IFC_RELOAD);
 423 }
 424
 425 static void
 426 wdev_create(struct wireless_device *wdev)
 427 {
 428         wdev->retry = WIRELESS_SETUP_RETRY;
 429         wdev->config = blob_memdup(wdev->config);
 430 }
 431
 432 static void
 433 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 434             struct vlist_node *node_old)
 435 {
 436         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 437         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 438
 439         if (wd_old && wd_new) {
 440                 wdev_change_config(wd_old, wd_new);
 441         } else if (wd_old) {
 442                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 443                 wdev_set_config_state(wd_old, IFC_REMOVE);
 444         } else if (wd_new) {
 445                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 446                 wdev_create(wd_new);
 447         }
 448 }
 449
 450 static void
 451 wireless_add_handler(const char *script, const char *name, json_object *obj)
 452 {
 453         struct wireless_driver *drv;
 454         char *name_str, *script_str;
 455         json_object *dev_config_obj, *iface_config_obj;
 456         struct uci_blob_param_list *dev_config, *iface_config;
 457
 458         dev_config_obj = json_get_field(obj, "device", json_type_array);
 459         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 460
 461         if (!dev_config_obj || !iface_config_obj)
 462                 return;
 463
 464         drv = calloc_a(sizeof(*drv),
 465                 &name_str, strlen(name) + 1,
 466                 &script_str, strlen(script) + 1,
 467                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 468                 &iface_config, sizeof(*iface_config) + sizeof(void *));
 469
 470         drv->name = strcpy(name_str, name);
 471         drv->script = strcpy(script_str, script);
 472
 473         dev_config->n_next = 1;
 474         dev_config->next[0] = &wdev_param;
 475         drv->device.config = dev_config;
 476
 477         iface_config->n_next = 1;
 478         iface_config->next[0] = &vif_param;
 479         drv->interface.config = iface_config;
 480
 481         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 482         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 483
 484         drv->node.key = drv->name;
 485         avl_insert(&wireless_drivers, &drv->node);
 486         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 487 }
 488
 489 static void __init
 490 wireless_init_list(void)
 491 {
 492         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 493         wireless_devices.keep_old = true;
 494         wireless_devices.no_delete = true;
 495
 496         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 497         drv_fd = netifd_open_subdir("wireless");
 498         if (drv_fd < 0)
 499                 return;
 500
 501         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 502 }
 503
 504 static void
 505 wireless_interface_init_config(struct wireless_interface *vif)
 506 {
 507         struct blob_attr *tb[__VIF_ATTR_MAX];
 508         struct blob_attr *cur;
 509
 510         vif->network = NULL;
 511         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 512
 513         if ((cur = tb[VIF_ATTR_NETWORK]))
 514                 vif->network = cur;
 515 }
 516
 517 static void
 518 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 519            struct vlist_node *node_old)
 520 {
 521         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 522         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 523         struct wireless_device *wdev;
 524
 525         if (vif_old)
 526                 wdev = vif_old->wdev;
 527         else
 528                 wdev = vif_new->wdev;
 529
 530         if (vif_old && vif_new) {
 531                 vif_old->section = vif_new->section;
 532                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 533                         free(vif_new);
 534                         return;
 535                 }
 536
 537                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 538                 free(vif_old->config);
 539                 vif_old->config = blob_memdup(vif_new->config);
 540                 wireless_interface_init_config(vif_old);
 541                 free(vif_new);
 542         } else if (vif_new) {
 543                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 544                 vif_new->config = blob_memdup(vif_new->config);
 545                 wireless_interface_init_config(vif_new);
 546         } else if (vif_old) {
 547                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 548                 free(vif_old->config);
 549                 free(vif_old);
 550         }
 551
 552         wdev_set_config_state(wdev, IFC_RELOAD);
 553 }
 554
 555 static void
 556 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 557 {
 558         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 559         char buf[128];
 560
 561         while (1) {
 562                 int b = read(fd->fd, buf, sizeof(buf));
 563                 if (b < 0) {
 564                         if (errno == EINTR)
 565                                 continue;
 566
 567                         if (errno == EAGAIN)
 568                                 return;
 569
 570                         goto done;
 571                 }
 572
 573                 if (!b)
 574                         goto done;
 575         }
 576
 577 done:
 578         uloop_timeout_set(&wdev->script_check, 0);
 579         wireless_close_script_proc_fd(wdev);
 580 }
 581
 582 static void
 583 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 584 {
 585         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 586         struct wireless_process *proc, *tmp;
 587         bool restart = false;
 588
 589         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 590                 if (wireless_process_check(proc))
 591                         continue;
 592
 593                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 594                 if (proc->required)
 595                         restart = true;
 596
 597                 wireless_process_free(wdev, proc);
 598         }
 599
 600         if (restart)
 601                 wireless_device_retry_setup(wdev);
 602         else
 603                 uloop_timeout_set(&wdev->script_check, 1000);
 604 }
 605
 606 void
 607 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 608 {
 609         struct wireless_device *wdev;
 610         char *name_buf;
 611         struct blob_attr *disabled;
 612
 613         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 614         if (disabled && blobmsg_get_bool(disabled))
 615                 return;
 616
 617         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 618         wdev->drv = drv;
 619         wdev->state = IFS_DOWN;
 620         wdev->config_state = IFC_NORMAL;
 621         wdev->name = strcpy(name_buf, name);
 622         wdev->config = data;
 623         wdev->config_autostart = true;
 624         wdev->autostart = wdev->config_autostart;
 625         INIT_LIST_HEAD(&wdev->script_proc);
 626         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 627         wdev->interfaces.keep_old = true;
 628         wdev->interfaces.no_delete = true;
 629         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 630
 631         wdev->timeout.cb = wireless_device_setup_timeout;
 632         wdev->script_task.cb = wireless_device_script_task_cb;
 633         wdev->script_task.dir_fd = drv_fd;
 634         wdev->script_task.log_prefix = wdev->name;
 635
 636         wdev->script_proc_fd.fd = -1;
 637         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 638
 639         wdev->script_check.cb = wireless_device_check_script_tasks;
 640 }
 641
 642 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 643 {
 644         struct wireless_interface *vif;
 645         struct blob_attr *tb[__VIF_ATTR_MAX];
 646         struct blob_attr *cur;
 647         char *name_buf;
 648         char name[8];
 649
 650         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 651
 652         cur = tb[VIF_ATTR_DISABLED];
 653         if (cur && blobmsg_get_bool(cur))
 654                 return;
 655
 656         sprintf(name, "%d", wdev->vif_idx++);
 657
 658         vif = calloc_a(sizeof(*vif), &name_buf, strlen(name) + 1);
 659         vif->name = strcpy(name_buf, name);
 660         vif->wdev = wdev;
 661         vif->config = data;
 662         vif->section = section;
 663         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 664 }
 665
 666 static void
 667 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 668 {
 669         void *i;
 670
 671         i = blobmsg_open_table(b, NULL);
 672         if (iface->section)
 673                 blobmsg_add_string(b, "section", iface->section);
 674         if (iface->ifname)
 675                 blobmsg_add_string(b, "ifname", iface->ifname);
 676         if (iface->data)
 677                 blob_put_raw(b, blob_data(iface->data), blob_len(iface->data));
 678         blobmsg_close_table(b, i);
 679 }
 680
 681 void
 682 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 683 {
 684         struct wireless_interface *iface;
 685         void *c, *i;
 686
 687         c = blobmsg_open_table(b, wdev->name);
 688         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 689         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 690         blobmsg_add_u8(b, "autostart", wdev->autostart);
 691         i = blobmsg_open_array(b, "interfaces");
 692         vlist_for_each_element(&wdev->interfaces, iface, node)
 693                 wireless_interface_status(iface, b);
 694         blobmsg_close_array(b, i);
 695         blobmsg_close_table(b, c);
 696 }
 697
 698 static void
 699 wireless_interface_set_data(struct wireless_interface *vif)
 700 {
 701         enum {
 702                 VIF_DATA_IFNAME,
 703                 __VIF_DATA_MAX,
 704         };
 705         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 706                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 707         };
 708         struct blob_attr *tb[__VIF_DATA_MAX];
 709         struct blob_attr *cur;
 710
 711         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 712                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 713
 714         if ((cur = tb[VIF_DATA_IFNAME]))
 715                 vif->ifname = blobmsg_data(cur);
 716 }
 717
 718 static int
 719 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 720 {
 721         enum {
 722                 PROC_ATTR_PID,
 723                 PROC_ATTR_EXE,
 724                 PROC_ATTR_REQUIRED,
 725                 __PROC_ATTR_MAX
 726         };
 727         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 728                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 729                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 730                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 731         };
 732         struct blob_attr *tb[__PROC_ATTR_MAX];
 733         struct wireless_process *proc;
 734         char *name;
 735         int pid;
 736
 737         if (!data)
 738                 return UBUS_STATUS_INVALID_ARGUMENT;
 739
 740         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 741         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 742                 return UBUS_STATUS_INVALID_ARGUMENT;
 743
 744         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 745         if (pid < 2)
 746                 return UBUS_STATUS_INVALID_ARGUMENT;
 747
 748         proc = calloc_a(sizeof(*proc),
 749                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 750
 751         proc->pid = pid;
 752         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 753
 754         if (tb[PROC_ATTR_REQUIRED])
 755                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 756
 757         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 758         list_add(&proc->list, &wdev->script_proc);
 759         uloop_timeout_set(&wdev->script_check, 0);
 760
 761         return 0;
 762 }
 763
 764 static int
 765 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 766                                  struct ubus_request_data *req)
 767 {
 768         enum {
 769                 KILL_ATTR_SIGNAL,
 770                 KILL_ATTR_IMMEDIATE,
 771                 __KILL_ATTR_MAX
 772         };
 773         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 774                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 775                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 776         };
 777         struct blob_attr *tb[__KILL_ATTR_MAX];
 778         struct blob_attr *cur;
 779         bool immediate = false;
 780         int signal = SIGTERM;
 781
 782         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 783
 784         if ((cur = tb[KILL_ATTR_SIGNAL]))
 785                 signal = blobmsg_get_u32(cur);
 786
 787         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 788                 immediate = blobmsg_get_bool(cur);
 789
 790         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 791                 return UBUS_STATUS_PERMISSION_DENIED;
 792
 793         wireless_process_kill_all(wdev, signal, immediate);
 794
 795         if (list_empty(&wdev->script_proc))
 796                 return 0;
 797
 798         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 799         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 800
 801         return 0;
 802 }
 803
 804 static int
 805 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 806 {
 807         static const struct blobmsg_policy retry_policy = {
 808                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 809         };
 810         struct blob_attr *val;
 811
 812         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 813         if (!val)
 814                 return UBUS_STATUS_INVALID_ARGUMENT;
 815
 816         wdev->retry = blobmsg_get_u32(val);
 817         return 0;
 818 }
 819
 820 enum {
 821         NOTIFY_CMD_UP = 0,
 822         NOTIFY_CMD_SET_DATA = 1,
 823         NOTIFY_CMD_PROCESS_ADD = 2,
 824         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 825         NOTIFY_CMD_SET_RETRY = 4,
 826 };
 827
 828 int
 829 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 830                        struct ubus_request_data *req)
 831 {
 832         enum {
 833                 NOTIFY_ATTR_COMMAND,
 834                 NOTIFY_ATTR_VIF,
 835                 NOTIFY_ATTR_DATA,
 836                 __NOTIFY_MAX,
 837         };
 838         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 839                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 840                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 841                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 842         };
 843         struct wireless_interface *vif = NULL;
 844         struct blob_attr *tb[__NOTIFY_MAX];
 845         struct blob_attr *cur, **pdata;
 846
 847         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 848
 849         if (!tb[NOTIFY_ATTR_COMMAND])
 850                 return UBUS_STATUS_INVALID_ARGUMENT;
 851
 852         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 853                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 854                 if (!vif)
 855                         return UBUS_STATUS_NOT_FOUND;
 856         }
 857
 858         cur = tb[NOTIFY_ATTR_DATA];
 859         if (!cur)
 860                 return UBUS_STATUS_INVALID_ARGUMENT;
 861
 862         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 863         case NOTIFY_CMD_UP:
 864                 if (vif)
 865                         return UBUS_STATUS_INVALID_ARGUMENT;
 866
 867                 if (wdev->state != IFS_SETUP)
 868                         return UBUS_STATUS_PERMISSION_DENIED;
 869
 870                 if (wdev->cancel)
 871                         return 0;
 872
 873                 wireless_device_mark_up(wdev);
 874                 break;
 875         case NOTIFY_CMD_SET_DATA:
 876                 if (vif)
 877                         pdata = &vif->data;
 878                 else
 879                         pdata = &wdev->data;
 880
 881                 if (*pdata)
 882                         return UBUS_STATUS_INVALID_ARGUMENT;
 883
 884                 *pdata = blob_memdup(cur);
 885                 if (vif)
 886                         wireless_interface_set_data(vif);
 887                 break;
 888         case NOTIFY_CMD_PROCESS_ADD:
 889                 return wireless_device_add_process(wdev, cur);
 890         case NOTIFY_CMD_PROCESS_KILL_ALL:
 891                 return wireless_device_process_kill_all(wdev, cur, req);
 892         case NOTIFY_CMD_SET_RETRY:
 893                 return wireless_device_set_retry(wdev, cur);
 894         default:
 895                 return UBUS_STATUS_INVALID_ARGUMENT;
 896         }
 897
 898         return 0;
 899 }
 900
 901 void
 902 wireless_start_pending(void)
 903 {
 904         struct wireless_device *wdev;
 905
 906         vlist_for_each_element(&wireless_devices, wdev, node)
 907                 if (wdev->autostart)
 908                         __wireless_device_set_up(wdev);
 909 }