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_setup_timeout(struct uloop_timeout *timeout)
 321 {
 322         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 323
 324         netifd_kill_process(&wdev->script_task);
 325         wdev->script_task.cb(&wdev->script_task, -1);
 326         wireless_device_mark_down(wdev);
 327 }
 328
 329 void
 330 wireless_device_set_up(struct wireless_device *wdev)
 331 {
 332         wdev->retry = WIRELESS_SETUP_RETRY;
 333         wdev->autostart = true;
 334         __wireless_device_set_up(wdev);
 335 }
 336
 337 static void
 338 __wireless_device_set_down(struct wireless_device *wdev)
 339 {
 340         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 341                 return;
 342
 343         if (wdev->script_task.uloop.pending) {
 344                 wireless_device_setup_cancel(wdev);
 345                 return;
 346         }
 347
 348         wdev->state = IFS_TEARDOWN;
 349         wireless_device_run_handler(wdev, false);
 350 }
 351
 352 static void
 353 wireless_device_mark_up(struct wireless_device *wdev)
 354 {
 355         struct wireless_interface *vif;
 356
 357         if (wdev->cancel) {
 358                 wdev->cancel = false;
 359                 __wireless_device_set_down(wdev);
 360                 return;
 361         }
 362
 363         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 364         wdev->state = IFS_UP;
 365         vlist_for_each_element(&wdev->interfaces, vif, node)
 366                 wireless_interface_handle_link(vif, true);
 367 }
 368
 369 static void
 370 wireless_device_retry_setup(struct wireless_device *wdev)
 371 {
 372         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN || wdev->cancel)
 373                 return;
 374
 375         if (--wdev->retry < 0)
 376                 wdev->autostart = false;
 377
 378         __wireless_device_set_down(wdev);
 379 }
 380
 381 static void
 382 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 383 {
 384         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 385
 386         switch (wdev->state) {
 387         case IFS_SETUP:
 388                 wireless_device_retry_setup(wdev);
 389                 break;
 390         case IFS_TEARDOWN:
 391                 wireless_device_mark_down(wdev);
 392                 break;
 393         default:
 394                 break;
 395         }
 396 }
 397
 398 void
 399 wireless_device_set_down(struct wireless_device *wdev)
 400 {
 401         wdev->autostart = false;
 402         __wireless_device_set_down(wdev);
 403 }
 404
 405 static void
 406 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 407 {
 408         if (wdev->config_state != IFC_NORMAL)
 409                 return;
 410
 411         wdev->config_state = s;
 412         if (wdev->state == IFS_DOWN)
 413                 wdev_handle_config_change(wdev);
 414         else
 415                 __wireless_device_set_down(wdev);
 416 }
 417
 418 static void
 419 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 420 {
 421         struct blob_attr *new_config = wd_new->config;
 422         bool disabled = wd_new->disabled;
 423
 424         free(wd_new);
 425
 426         if (blob_attr_equal(wdev->config, new_config) && wdev->disabled == disabled)
 427                 return;
 428
 429         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 430         free(wdev->config);
 431         wdev->config = blob_memdup(new_config);
 432         wdev->disabled = disabled;
 433         wdev_set_config_state(wdev, IFC_RELOAD);
 434 }
 435
 436 static void
 437 wdev_create(struct wireless_device *wdev)
 438 {
 439         wdev->retry = WIRELESS_SETUP_RETRY;
 440         wdev->config = blob_memdup(wdev->config);
 441 }
 442
 443 static void
 444 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 445             struct vlist_node *node_old)
 446 {
 447         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 448         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 449
 450         if (wd_old && wd_new) {
 451                 wdev_change_config(wd_old, wd_new);
 452         } else if (wd_old) {
 453                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 454                 wdev_set_config_state(wd_old, IFC_REMOVE);
 455         } else if (wd_new) {
 456                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 457                 wdev_create(wd_new);
 458         }
 459 }
 460
 461 static void
 462 wireless_add_handler(const char *script, const char *name, json_object *obj)
 463 {
 464         struct wireless_driver *drv;
 465         char *name_str, *script_str;
 466         json_object *dev_config_obj, *iface_config_obj;
 467         struct uci_blob_param_list *dev_config, *iface_config;
 468
 469         dev_config_obj = json_get_field(obj, "device", json_type_array);
 470         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 471
 472         if (!dev_config_obj || !iface_config_obj)
 473                 return;
 474
 475         drv = calloc_a(sizeof(*drv),
 476                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 477                 &iface_config, sizeof(*iface_config) + sizeof(void *),
 478                 &name_str, strlen(name) + 1,
 479                 &script_str, strlen(script) + 1);
 480
 481         drv->name = strcpy(name_str, name);
 482         drv->script = strcpy(script_str, script);
 483
 484         dev_config->n_next = 1;
 485         dev_config->next[0] = &wdev_param;
 486         drv->device.config = dev_config;
 487
 488         iface_config->n_next = 1;
 489         iface_config->next[0] = &vif_param;
 490         drv->interface.config = iface_config;
 491
 492         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 493         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 494
 495         drv->node.key = drv->name;
 496         avl_insert(&wireless_drivers, &drv->node);
 497         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 498 }
 499
 500 void wireless_init(void)
 501 {
 502         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 503         wireless_devices.keep_old = true;
 504         wireless_devices.no_delete = true;
 505
 506         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 507         drv_fd = netifd_open_subdir("wireless");
 508         if (drv_fd < 0)
 509                 return;
 510
 511         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 512 }
 513
 514 static void
 515 wireless_interface_init_config(struct wireless_interface *vif)
 516 {
 517         struct blob_attr *tb[__VIF_ATTR_MAX];
 518         struct blob_attr *cur;
 519
 520         vif->network = NULL;
 521         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 522
 523         if ((cur = tb[VIF_ATTR_NETWORK]))
 524                 vif->network = cur;
 525 }
 526
 527 static void
 528 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 529            struct vlist_node *node_old)
 530 {
 531         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 532         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 533         struct wireless_device *wdev;
 534
 535         if (vif_old)
 536                 wdev = vif_old->wdev;
 537         else
 538                 wdev = vif_new->wdev;
 539
 540         if (vif_old && vif_new) {
 541                 vif_old->section = vif_new->section;
 542                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 543                         free(vif_new);
 544                         return;
 545                 }
 546
 547                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 548                 free(vif_old->config);
 549                 vif_old->config = blob_memdup(vif_new->config);
 550                 wireless_interface_init_config(vif_old);
 551                 free(vif_new);
 552         } else if (vif_new) {
 553                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 554                 vif_new->config = blob_memdup(vif_new->config);
 555                 wireless_interface_init_config(vif_new);
 556         } else if (vif_old) {
 557                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 558                 free(vif_old->config);
 559                 free(vif_old);
 560         }
 561
 562         wdev_set_config_state(wdev, IFC_RELOAD);
 563 }
 564
 565 static void
 566 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 567 {
 568         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 569         char buf[128];
 570
 571         while (1) {
 572                 int b = read(fd->fd, buf, sizeof(buf));
 573                 if (b < 0) {
 574                         if (errno == EINTR)
 575                                 continue;
 576
 577                         if (errno == EAGAIN)
 578                                 return;
 579
 580                         goto done;
 581                 }
 582
 583                 if (!b)
 584                         goto done;
 585         }
 586
 587 done:
 588         uloop_timeout_set(&wdev->script_check, 0);
 589         wireless_close_script_proc_fd(wdev);
 590 }
 591
 592 static void
 593 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 594 {
 595         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 596         struct wireless_process *proc, *tmp;
 597         bool restart = false;
 598
 599         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 600                 if (wireless_process_check(proc))
 601                         continue;
 602
 603                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 604                 if (proc->required)
 605                         restart = true;
 606
 607                 wireless_process_free(wdev, proc);
 608         }
 609
 610         if (restart)
 611                 wireless_device_retry_setup(wdev);
 612         else
 613                 uloop_timeout_set(&wdev->script_check, 1000);
 614 }
 615
 616 void
 617 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 618 {
 619         struct wireless_device *wdev;
 620         char *name_buf;
 621         struct blob_attr *disabled;
 622
 623         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 624
 625         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 626         if (disabled && blobmsg_get_bool(disabled))
 627                 wdev->disabled = true;
 628         wdev->drv = drv;
 629         wdev->state = IFS_DOWN;
 630         wdev->config_state = IFC_NORMAL;
 631         wdev->name = strcpy(name_buf, name);
 632         wdev->config = data;
 633         wdev->config_autostart = true;
 634         wdev->autostart = wdev->config_autostart;
 635         INIT_LIST_HEAD(&wdev->script_proc);
 636         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 637         wdev->interfaces.keep_old = true;
 638
 639         wdev->timeout.cb = wireless_device_setup_timeout;
 640         wdev->script_task.cb = wireless_device_script_task_cb;
 641         wdev->script_task.dir_fd = drv_fd;
 642         wdev->script_task.log_prefix = wdev->name;
 643
 644         wdev->script_proc_fd.fd = -1;
 645         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 646
 647         wdev->script_check.cb = wireless_device_check_script_tasks;
 648
 649         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 650 }
 651
 652 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 653 {
 654         struct wireless_interface *vif;
 655         struct blob_attr *tb[__VIF_ATTR_MAX];
 656         struct blob_attr *cur;
 657         char *name_buf;
 658         char name[8];
 659
 660         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 661
 662         cur = tb[VIF_ATTR_DISABLED];
 663         if (cur && blobmsg_get_bool(cur))
 664                 return;
 665
 666         sprintf(name, "%d", wdev->vif_idx++);
 667
 668         vif = calloc_a(sizeof(*vif), &name_buf, strlen(name) + 1);
 669         vif->name = strcpy(name_buf, name);
 670         vif->wdev = wdev;
 671         vif->config = data;
 672         vif->section = section;
 673         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 674 }
 675
 676 static void
 677 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 678 {
 679         void *i;
 680
 681         i = blobmsg_open_table(b, NULL);
 682         if (iface->section)
 683                 blobmsg_add_string(b, "section", iface->section);
 684         if (iface->ifname)
 685                 blobmsg_add_string(b, "ifname", iface->ifname);
 686         if (iface->data)
 687                 blob_put_raw(b, blob_data(iface->data), blob_len(iface->data));
 688         blobmsg_close_table(b, i);
 689 }
 690
 691 void
 692 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 693 {
 694         struct wireless_interface *iface;
 695         void *c, *i;
 696
 697         c = blobmsg_open_table(b, wdev->name);
 698         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 699         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 700         blobmsg_add_u8(b, "autostart", wdev->autostart);
 701         blobmsg_add_u8(b, "disabled", wdev->disabled);
 702
 703         i = blobmsg_open_array(b, "interfaces");
 704         vlist_for_each_element(&wdev->interfaces, iface, node)
 705                 wireless_interface_status(iface, b);
 706         blobmsg_close_array(b, i);
 707         blobmsg_close_table(b, c);
 708 }
 709
 710 void
 711 wireless_device_get_validate(struct wireless_device *wdev, struct blob_buf *b)
 712 {
 713         struct uci_blob_param_list *p;
 714         void *c, *d;
 715         int i;
 716
 717         c = blobmsg_open_table(b, wdev->name);
 718
 719         d = blobmsg_open_table(b, "device");
 720         p = wdev->drv->device.config;
 721         for (i = 0; i < p->n_params; i++)
 722                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 723         blobmsg_close_table(b, d);
 724
 725         d = blobmsg_open_table(b, "interface");
 726         p = wdev->drv->interface.config;
 727         for (i = 0; i < p->n_params; i++)
 728                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 729         blobmsg_close_table(b, d);
 730
 731         blobmsg_close_table(b, c);
 732 }
 733
 734 static void
 735 wireless_interface_set_data(struct wireless_interface *vif)
 736 {
 737         enum {
 738                 VIF_DATA_IFNAME,
 739                 __VIF_DATA_MAX,
 740         };
 741         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 742                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 743         };
 744         struct blob_attr *tb[__VIF_DATA_MAX];
 745         struct blob_attr *cur;
 746
 747         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 748                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 749
 750         if ((cur = tb[VIF_DATA_IFNAME]))
 751                 vif->ifname = blobmsg_data(cur);
 752 }
 753
 754 static int
 755 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 756 {
 757         enum {
 758                 PROC_ATTR_PID,
 759                 PROC_ATTR_EXE,
 760                 PROC_ATTR_REQUIRED,
 761                 __PROC_ATTR_MAX
 762         };
 763         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 764                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 765                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 766                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 767         };
 768         struct blob_attr *tb[__PROC_ATTR_MAX];
 769         struct wireless_process *proc;
 770         char *name;
 771         int pid;
 772
 773         if (!data)
 774                 return UBUS_STATUS_INVALID_ARGUMENT;
 775
 776         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 777         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 778                 return UBUS_STATUS_INVALID_ARGUMENT;
 779
 780         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 781         if (pid < 2)
 782                 return UBUS_STATUS_INVALID_ARGUMENT;
 783
 784         proc = calloc_a(sizeof(*proc),
 785                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 786
 787         proc->pid = pid;
 788         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 789
 790         if (tb[PROC_ATTR_REQUIRED])
 791                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 792
 793         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 794         list_add(&proc->list, &wdev->script_proc);
 795         uloop_timeout_set(&wdev->script_check, 0);
 796
 797         return 0;
 798 }
 799
 800 static int
 801 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 802                                  struct ubus_request_data *req)
 803 {
 804         enum {
 805                 KILL_ATTR_SIGNAL,
 806                 KILL_ATTR_IMMEDIATE,
 807                 __KILL_ATTR_MAX
 808         };
 809         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 810                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 811                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 812         };
 813         struct blob_attr *tb[__KILL_ATTR_MAX];
 814         struct blob_attr *cur;
 815         bool immediate = false;
 816         int signal = SIGTERM;
 817
 818         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 819
 820         if ((cur = tb[KILL_ATTR_SIGNAL]))
 821                 signal = blobmsg_get_u32(cur);
 822
 823         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 824                 immediate = blobmsg_get_bool(cur);
 825
 826         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 827                 return UBUS_STATUS_PERMISSION_DENIED;
 828
 829         wireless_process_kill_all(wdev, signal, immediate);
 830
 831         if (list_empty(&wdev->script_proc))
 832                 return 0;
 833
 834         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 835         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 836
 837         return 0;
 838 }
 839
 840 static int
 841 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 842 {
 843         static const struct blobmsg_policy retry_policy = {
 844                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 845         };
 846         struct blob_attr *val;
 847
 848         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 849         if (!val)
 850                 return UBUS_STATUS_INVALID_ARGUMENT;
 851
 852         wdev->retry = blobmsg_get_u32(val);
 853         return 0;
 854 }
 855
 856 enum {
 857         NOTIFY_CMD_UP = 0,
 858         NOTIFY_CMD_SET_DATA = 1,
 859         NOTIFY_CMD_PROCESS_ADD = 2,
 860         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 861         NOTIFY_CMD_SET_RETRY = 4,
 862 };
 863
 864 int
 865 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 866                        struct ubus_request_data *req)
 867 {
 868         enum {
 869                 NOTIFY_ATTR_COMMAND,
 870                 NOTIFY_ATTR_VIF,
 871                 NOTIFY_ATTR_DATA,
 872                 __NOTIFY_MAX,
 873         };
 874         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 875                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 876                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 877                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 878         };
 879         struct wireless_interface *vif = NULL;
 880         struct blob_attr *tb[__NOTIFY_MAX];
 881         struct blob_attr *cur, **pdata;
 882
 883         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 884
 885         if (!tb[NOTIFY_ATTR_COMMAND])
 886                 return UBUS_STATUS_INVALID_ARGUMENT;
 887
 888         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 889                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 890                 if (!vif)
 891                         return UBUS_STATUS_NOT_FOUND;
 892         }
 893
 894         cur = tb[NOTIFY_ATTR_DATA];
 895         if (!cur)
 896                 return UBUS_STATUS_INVALID_ARGUMENT;
 897
 898         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 899         case NOTIFY_CMD_UP:
 900                 if (vif)
 901                         return UBUS_STATUS_INVALID_ARGUMENT;
 902
 903                 if (wdev->state != IFS_SETUP)
 904                         return UBUS_STATUS_PERMISSION_DENIED;
 905
 906                 wireless_device_mark_up(wdev);
 907                 break;
 908         case NOTIFY_CMD_SET_DATA:
 909                 if (vif)
 910                         pdata = &vif->data;
 911                 else
 912                         pdata = &wdev->data;
 913
 914                 if (*pdata)
 915                         return UBUS_STATUS_INVALID_ARGUMENT;
 916
 917                 *pdata = blob_memdup(cur);
 918                 if (vif)
 919                         wireless_interface_set_data(vif);
 920                 break;
 921         case NOTIFY_CMD_PROCESS_ADD:
 922                 return wireless_device_add_process(wdev, cur);
 923         case NOTIFY_CMD_PROCESS_KILL_ALL:
 924                 return wireless_device_process_kill_all(wdev, cur, req);
 925         case NOTIFY_CMD_SET_RETRY:
 926                 return wireless_device_set_retry(wdev, cur);
 927         default:
 928                 return UBUS_STATUS_INVALID_ARGUMENT;
 929         }
 930
 931         return 0;
 932 }
 933
 934 void
 935 wireless_start_pending(void)
 936 {
 937         struct wireless_device *wdev;
 938
 939         vlist_for_each_element(&wireless_devices, wdev, node)
 940                 if (wdev->autostart)
 941                         __wireless_device_set_up(wdev);
 942 }