wireless.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include <signal.h>
  15 #include "netifd.h"
  16 #include "wireless.h"
  17 #include "handler.h"
  18 #include "ubus.h"
  19
  20 #define WIRELESS_SETUP_RETRY    3
  21
  22 struct vlist_tree wireless_devices;
  23 struct avl_tree wireless_drivers;
  24 static struct blob_buf b;
  25 static int drv_fd;
  26
  27 static const struct blobmsg_policy wdev_policy =
  28         { .name = "disabled", .type = BLOBMSG_TYPE_BOOL };
  29
  30 static const struct uci_blob_param_list wdev_param = {
  31         .n_params = 1,
  32         .params = &wdev_policy,
  33 };
  34
  35 enum {
  36         VIF_ATTR_DISABLED,
  37         VIF_ATTR_NETWORK,
  38         VIF_ATTR_ISOLATE,
  39         VIF_ATTR_MODE,
  40         __VIF_ATTR_MAX,
  41 };
  42
  43 static const struct blobmsg_policy vif_policy[__VIF_ATTR_MAX] = {
  44         [VIF_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
  45         [VIF_ATTR_NETWORK] = { .name = "network", .type = BLOBMSG_TYPE_ARRAY },
  46         [VIF_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
  47         [VIF_ATTR_MODE] = { .name = "mode", .type = BLOBMSG_TYPE_STRING },
  48 };
  49
  50 static const struct uci_blob_param_list vif_param = {
  51         .n_params = ARRAY_SIZE(vif_policy),
  52         .params = vif_policy,
  53 };
  54
  55 static void
  56 put_container(struct blob_buf *buf, struct blob_attr *attr, const char *name)
  57 {
  58         void *c = blobmsg_open_table(buf, name);
  59         blob_put_raw(buf, blob_data(attr), blob_len(attr));
  60         blobmsg_close_table(buf, c);
  61 }
  62
  63 static void
  64 vif_config_add_bridge(struct blob_buf *buf, struct blob_attr *networks, bool prepare)
  65 {
  66         struct interface *iface;
  67         struct device *dev = NULL;
  68         struct blob_attr *cur;
  69         const char *network;
  70         int rem;
  71
  72         if (!networks)
  73                 return;
  74
  75         blobmsg_for_each_attr(cur, networks, rem) {
  76                 network = blobmsg_data(cur);
  77
  78                 iface = vlist_find(&interfaces, network, iface, node);
  79                 if (!iface)
  80                         continue;
  81
  82                 dev = iface->main_dev.dev;
  83                 if (!dev)
  84                         return;
  85
  86                 if (dev->type != &bridge_device_type)
  87                         return;
  88         }
  89
  90         if (!dev)
  91                 return;
  92
  93         if (dev->hotplug_ops && dev->hotplug_ops->prepare)
  94                 dev->hotplug_ops->prepare(dev);
  95
  96         blobmsg_add_string(buf, "bridge", dev->ifname);
  97
  98         if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
  99                 blobmsg_add_u8(buf, "multicast_to_unicast",
 100                                dev->settings.multicast_to_unicast);
 101 }
 102
 103 static void
 104 prepare_config(struct wireless_device *wdev, struct blob_buf *buf, bool up)
 105 {
 106         struct wireless_interface *vif;
 107         void *l, *i;
 108
 109         blob_buf_init(&b, 0);
 110         put_container(&b, wdev->config, "config");
 111         if (wdev->data)
 112                 blobmsg_add_blob(&b, wdev->data);
 113
 114         l = blobmsg_open_table(&b, "interfaces");
 115         vlist_for_each_element(&wdev->interfaces, vif, node) {
 116                 i = blobmsg_open_table(&b, vif->name);
 117                 vif_config_add_bridge(&b, vif->network, up);
 118                 put_container(&b, vif->config, "config");
 119                 if (vif->data)
 120                         blobmsg_add_blob(&b, vif->data);
 121                 blobmsg_close_table(&b, i);
 122         }
 123         blobmsg_close_table(&b, l);
 124 }
 125
 126 static bool
 127 wireless_process_check(struct wireless_process *proc)
 128 {
 129         return check_pid_path(proc->pid, proc->exe);
 130 }
 131
 132 static void
 133 wireless_complete_kill_request(struct wireless_device *wdev)
 134 {
 135         if (!wdev->kill_request)
 136                 return;
 137
 138         ubus_complete_deferred_request(ubus_ctx, wdev->kill_request, 0);
 139         free(wdev->kill_request);
 140         wdev->kill_request = NULL;
 141 }
 142
 143 static void
 144 wireless_process_free(struct wireless_device *wdev, struct wireless_process *proc)
 145 {
 146         D(WIRELESS, "Wireless device '%s' free pid %d\n", wdev->name, proc->pid);
 147         list_del(&proc->list);
 148         free(proc);
 149
 150         if (list_empty(&wdev->script_proc))
 151                 wireless_complete_kill_request(wdev);
 152 }
 153
 154 static void
 155 wireless_close_script_proc_fd(struct wireless_device *wdev)
 156 {
 157         if (wdev->script_proc_fd.fd < 0)
 158                 return;
 159
 160         uloop_fd_delete(&wdev->script_proc_fd);
 161         close(wdev->script_proc_fd.fd);
 162         wdev->script_proc_fd.fd = -1;
 163 }
 164
 165 static void
 166 wireless_process_kill_all(struct wireless_device *wdev, int signal, bool free)
 167 {
 168         struct wireless_process *proc, *tmp;
 169
 170         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 171                 bool check = wireless_process_check(proc);
 172
 173                 if (check) {
 174                         D(WIRELESS, "Wireless device '%s' kill pid %d\n", wdev->name, proc->pid);
 175                         kill(proc->pid, signal);
 176                 }
 177
 178                 if (free || !check)
 179                         wireless_process_free(wdev, proc);
 180         }
 181
 182         if (free)
 183                 wireless_close_script_proc_fd(wdev);
 184 }
 185
 186 static void
 187 wireless_device_free_state(struct wireless_device *wdev)
 188 {
 189         struct wireless_interface *vif;
 190
 191         uloop_timeout_cancel(&wdev->script_check);
 192         uloop_timeout_cancel(&wdev->timeout);
 193         wireless_complete_kill_request(wdev);
 194         free(wdev->data);
 195         wdev->data = NULL;
 196         vlist_for_each_element(&wdev->interfaces, vif, node) {
 197                 free(vif->data);
 198                 vif->data = NULL;
 199                 vif->ifname = NULL;
 200         }
 201 }
 202
 203 static void wireless_interface_handle_link(struct wireless_interface *vif, bool up)
 204 {
 205         struct interface *iface;
 206         struct blob_attr *cur;
 207         const char *network;
 208         int rem;
 209
 210         if (!vif->network || !vif->ifname)
 211                 return;
 212
 213         if (up) {
 214                 struct device *dev = device_get(vif->ifname, 2);
 215                 if (dev) {
 216                         dev->wireless_isolate = vif->isolate;
 217                         dev->wireless = true;
 218                         dev->wireless_ap = vif->ap_mode;
 219                 }
 220         }
 221
 222         blobmsg_for_each_attr(cur, vif->network, rem) {
 223                 network = blobmsg_data(cur);
 224
 225                 iface = vlist_find(&interfaces, network, iface, node);
 226                 if (!iface)
 227                         continue;
 228
 229                 interface_handle_link(iface, vif->ifname, up, true);
 230         }
 231 }
 232
 233 static void
 234 wireless_device_setup_cancel(struct wireless_device *wdev)
 235 {
 236         if (wdev->cancel)
 237                 return;
 238
 239         D(WIRELESS, "Cancel wireless device '%s' setup\n", wdev->name);
 240         wdev->cancel = true;
 241         uloop_timeout_set(&wdev->timeout, 10 * 1000);
 242 }
 243
 244 static void
 245 wireless_device_run_handler(struct wireless_device *wdev, bool up)
 246 {
 247         const char *action = up ? "setup" : "teardown";
 248         const char *argv[6];
 249         char *config;
 250         int i = 0;
 251         int fds[2] = { -1, -1 };
 252
 253         D(WIRELESS, "Wireless device '%s' run %s handler\n", wdev->name, action);
 254         if (!up && wdev->prev_config) {
 255                 config = blobmsg_format_json(wdev->prev_config, true);
 256                 free(wdev->prev_config);
 257                 wdev->prev_config = NULL;
 258         } else {
 259                 prepare_config(wdev, &b, up);
 260                 config = blobmsg_format_json(b.head, true);
 261         }
 262
 263         argv[i++] = wdev->drv->script;
 264         argv[i++] = wdev->drv->name;
 265         argv[i++] = action;
 266         argv[i++] = wdev->name;
 267         argv[i++] = config;
 268         argv[i] = NULL;
 269
 270         if (up && pipe(fds) == 0) {
 271                 wdev->script_proc_fd.fd = fds[0];
 272                 uloop_fd_add(&wdev->script_proc_fd,
 273                              ULOOP_READ | ULOOP_EDGE_TRIGGER);
 274         }
 275
 276         netifd_start_process(argv, NULL, &wdev->script_task);
 277
 278         if (fds[1] >= 0)
 279                 close(fds[1]);
 280
 281         free(config);
 282 }
 283
 284 static void
 285 __wireless_device_set_up(struct wireless_device *wdev)
 286 {
 287         if (wdev->disabled)
 288                 return;
 289
 290         if (wdev->state != IFS_DOWN || config_init)
 291                 return;
 292
 293         free(wdev->prev_config);
 294         wdev->prev_config = NULL;
 295         wdev->state = IFS_SETUP;
 296         wireless_device_run_handler(wdev, true);
 297 }
 298
 299 static void
 300 wireless_device_free(struct wireless_device *wdev)
 301 {
 302         vlist_flush_all(&wdev->interfaces);
 303         avl_delete(&wireless_devices.avl, &wdev->node.avl);
 304         free(wdev->config);
 305         free(wdev->prev_config);
 306         free(wdev);
 307 }
 308
 309 static void
 310 wdev_handle_config_change(struct wireless_device *wdev)
 311 {
 312         enum interface_config_state state = wdev->config_state;
 313
 314         switch(state) {
 315         case IFC_NORMAL:
 316         case IFC_RELOAD:
 317                 wdev->config_state = IFC_NORMAL;
 318                 if (wdev->autostart)
 319                         __wireless_device_set_up(wdev);
 320                 break;
 321         case IFC_REMOVE:
 322                 wireless_device_free(wdev);
 323                 break;
 324         }
 325 }
 326
 327 static void
 328 wireless_device_mark_down(struct wireless_device *wdev)
 329 {
 330         struct wireless_interface *vif;
 331
 332         D(WIRELESS, "Wireless device '%s' is now down\n", wdev->name);
 333
 334         vlist_for_each_element(&wdev->interfaces, vif, node)
 335                 wireless_interface_handle_link(vif, false);
 336
 337         wireless_process_kill_all(wdev, SIGTERM, true);
 338
 339         wdev->cancel = false;
 340         wdev->state = IFS_DOWN;
 341         wireless_device_free_state(wdev);
 342         wdev_handle_config_change(wdev);
 343 }
 344
 345 static void
 346 wireless_device_setup_timeout(struct uloop_timeout *timeout)
 347 {
 348         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 349
 350         netifd_kill_process(&wdev->script_task);
 351         wdev->script_task.cb(&wdev->script_task, -1);
 352         wireless_device_mark_down(wdev);
 353 }
 354
 355 void
 356 wireless_device_set_up(struct wireless_device *wdev)
 357 {
 358         wdev->retry = WIRELESS_SETUP_RETRY;
 359         wdev->autostart = true;
 360         __wireless_device_set_up(wdev);
 361 }
 362
 363 static void
 364 __wireless_device_set_down(struct wireless_device *wdev)
 365 {
 366         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 367                 return;
 368
 369         if (wdev->script_task.uloop.pending) {
 370                 wireless_device_setup_cancel(wdev);
 371                 return;
 372         }
 373
 374         wdev->state = IFS_TEARDOWN;
 375         wireless_device_run_handler(wdev, false);
 376 }
 377
 378 static void
 379 wireless_device_mark_up(struct wireless_device *wdev)
 380 {
 381         struct wireless_interface *vif;
 382
 383         if (wdev->cancel) {
 384                 wdev->cancel = false;
 385                 __wireless_device_set_down(wdev);
 386                 return;
 387         }
 388
 389         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 390         wdev->state = IFS_UP;
 391         vlist_for_each_element(&wdev->interfaces, vif, node)
 392                 wireless_interface_handle_link(vif, true);
 393 }
 394
 395 static void
 396 wireless_device_retry_setup(struct wireless_device *wdev)
 397 {
 398         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN || wdev->cancel)
 399                 return;
 400
 401         if (--wdev->retry < 0)
 402                 wdev->autostart = false;
 403
 404         __wireless_device_set_down(wdev);
 405 }
 406
 407 static void
 408 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 409 {
 410         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 411
 412         switch (wdev->state) {
 413         case IFS_SETUP:
 414                 wireless_device_retry_setup(wdev);
 415                 break;
 416         case IFS_TEARDOWN:
 417                 wireless_device_mark_down(wdev);
 418                 break;
 419         default:
 420                 break;
 421         }
 422 }
 423
 424 void
 425 wireless_device_set_down(struct wireless_device *wdev)
 426 {
 427         wdev->autostart = false;
 428         __wireless_device_set_down(wdev);
 429 }
 430
 431 static void
 432 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 433 {
 434         if (wdev->config_state != IFC_NORMAL)
 435                 return;
 436
 437         wdev->config_state = s;
 438         if (wdev->state == IFS_DOWN)
 439                 wdev_handle_config_change(wdev);
 440         else
 441                 __wireless_device_set_down(wdev);
 442 }
 443
 444 static void
 445 wdev_prepare_prev_config(struct wireless_device *wdev)
 446 {
 447         if (wdev->prev_config)
 448                 return;
 449
 450         prepare_config(wdev, &b, false);
 451         wdev->prev_config = blob_memdup(b.head);
 452 }
 453
 454 static void
 455 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 456 {
 457         struct blob_attr *new_config = wd_new->config;
 458         bool disabled = wd_new->disabled;
 459
 460         free(wd_new);
 461
 462         wdev_prepare_prev_config(wdev);
 463         if (blob_attr_equal(wdev->config, new_config) && wdev->disabled == disabled)
 464                 return;
 465
 466         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 467         free(wdev->config);
 468         wdev->config = blob_memdup(new_config);
 469         wdev->disabled = disabled;
 470         wdev_set_config_state(wdev, IFC_RELOAD);
 471 }
 472
 473 static void
 474 wdev_create(struct wireless_device *wdev)
 475 {
 476         wdev->retry = WIRELESS_SETUP_RETRY;
 477         wdev->config = blob_memdup(wdev->config);
 478 }
 479
 480 static void
 481 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 482             struct vlist_node *node_old)
 483 {
 484         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 485         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 486
 487         if (wd_old && wd_new) {
 488                 wdev_change_config(wd_old, wd_new);
 489         } else if (wd_old) {
 490                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 491                 wdev_set_config_state(wd_old, IFC_REMOVE);
 492         } else if (wd_new) {
 493                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 494                 wdev_create(wd_new);
 495         }
 496 }
 497
 498 static void
 499 wireless_add_handler(const char *script, const char *name, json_object *obj)
 500 {
 501         struct wireless_driver *drv;
 502         char *name_str, *script_str;
 503         json_object *dev_config_obj, *iface_config_obj;
 504         struct uci_blob_param_list *dev_config, *iface_config;
 505
 506         dev_config_obj = json_get_field(obj, "device", json_type_array);
 507         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 508
 509         if (!dev_config_obj || !iface_config_obj)
 510                 return;
 511
 512         drv = calloc_a(sizeof(*drv),
 513                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 514                 &iface_config, sizeof(*iface_config) + sizeof(void *),
 515                 &name_str, strlen(name) + 1,
 516                 &script_str, strlen(script) + 1);
 517
 518         drv->name = strcpy(name_str, name);
 519         drv->script = strcpy(script_str, script);
 520
 521         dev_config->n_next = 1;
 522         dev_config->next[0] = &wdev_param;
 523         drv->device.config = dev_config;
 524
 525         iface_config->n_next = 1;
 526         iface_config->next[0] = &vif_param;
 527         drv->interface.config = iface_config;
 528
 529         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 530         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 531
 532         drv->node.key = drv->name;
 533         avl_insert(&wireless_drivers, &drv->node);
 534         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 535 }
 536
 537 void wireless_init(void)
 538 {
 539         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 540         wireless_devices.keep_old = true;
 541         wireless_devices.no_delete = true;
 542
 543         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 544         drv_fd = netifd_open_subdir("wireless");
 545         if (drv_fd < 0)
 546                 return;
 547
 548         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 549 }
 550
 551 static void
 552 wireless_interface_init_config(struct wireless_interface *vif)
 553 {
 554         struct blob_attr *tb[__VIF_ATTR_MAX];
 555         struct blob_attr *cur;
 556
 557         vif->network = NULL;
 558         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 559
 560         if ((cur = tb[VIF_ATTR_NETWORK]))
 561                 vif->network = cur;
 562
 563         cur = tb[VIF_ATTR_ISOLATE];
 564         if (cur)
 565                 vif->isolate = blobmsg_get_bool(cur);
 566
 567         cur = tb[VIF_ATTR_MODE];
 568         if (cur)
 569                 vif->ap_mode = !strcmp(blobmsg_get_string(cur), "ap");
 570 }
 571
 572 static void
 573 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 574            struct vlist_node *node_old)
 575 {
 576         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 577         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 578         struct wireless_device *wdev;
 579
 580         if (vif_old)
 581                 wdev = vif_old->wdev;
 582         else
 583                 wdev = vif_new->wdev;
 584
 585         if (vif_old && vif_new) {
 586                 free((void *) vif_old->section);
 587                 vif_old->section = strdup(vif_new->section);
 588                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 589                         free(vif_new);
 590                         return;
 591                 }
 592
 593                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 594                 wireless_interface_handle_link(vif_old, false);
 595                 free(vif_old->config);
 596                 vif_old->config = blob_memdup(vif_new->config);
 597                 vif_old->isolate = vif_new->isolate;
 598                 vif_old->ap_mode = vif_new->ap_mode;
 599                 wireless_interface_init_config(vif_old);
 600                 free(vif_new);
 601         } else if (vif_new) {
 602                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 603                 vif_new->section = strdup(vif_new->section);
 604                 vif_new->config = blob_memdup(vif_new->config);
 605                 wireless_interface_init_config(vif_new);
 606         } else if (vif_old) {
 607                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 608                 free((void *) vif_old->section);
 609                 free(vif_old->config);
 610                 free(vif_old);
 611         }
 612
 613         wdev_set_config_state(wdev, IFC_RELOAD);
 614 }
 615
 616 static void
 617 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 618 {
 619         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 620         char buf[128];
 621
 622         while (1) {
 623                 int b = read(fd->fd, buf, sizeof(buf));
 624                 if (b < 0) {
 625                         if (errno == EINTR)
 626                                 continue;
 627
 628                         if (errno == EAGAIN)
 629                                 return;
 630
 631                         goto done;
 632                 }
 633
 634                 if (!b)
 635                         goto done;
 636         }
 637
 638 done:
 639         uloop_timeout_set(&wdev->script_check, 0);
 640         wireless_close_script_proc_fd(wdev);
 641 }
 642
 643 static void
 644 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 645 {
 646         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 647         struct wireless_process *proc, *tmp;
 648         bool restart = false;
 649
 650         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 651                 if (wireless_process_check(proc))
 652                         continue;
 653
 654                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 655                 if (proc->required)
 656                         restart = true;
 657
 658                 wireless_process_free(wdev, proc);
 659         }
 660
 661         if (restart)
 662                 wireless_device_retry_setup(wdev);
 663         else
 664                 uloop_timeout_set(&wdev->script_check, 1000);
 665 }
 666
 667 void
 668 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 669 {
 670         struct wireless_device *wdev;
 671         char *name_buf;
 672         struct blob_attr *disabled;
 673
 674         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 675
 676         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 677         if (disabled && blobmsg_get_bool(disabled))
 678                 wdev->disabled = true;
 679         wdev->drv = drv;
 680         wdev->state = IFS_DOWN;
 681         wdev->config_state = IFC_NORMAL;
 682         wdev->name = strcpy(name_buf, name);
 683         wdev->config = data;
 684         wdev->config_autostart = true;
 685         wdev->autostart = wdev->config_autostart;
 686         INIT_LIST_HEAD(&wdev->script_proc);
 687         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 688         wdev->interfaces.keep_old = true;
 689
 690         wdev->timeout.cb = wireless_device_setup_timeout;
 691         wdev->script_task.cb = wireless_device_script_task_cb;
 692         wdev->script_task.dir_fd = drv_fd;
 693         wdev->script_task.log_prefix = wdev->name;
 694
 695         wdev->script_proc_fd.fd = -1;
 696         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 697
 698         wdev->script_check.cb = wireless_device_check_script_tasks;
 699
 700         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 701 }
 702
 703 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 704 {
 705         struct wireless_interface *vif;
 706         struct blob_attr *tb[__VIF_ATTR_MAX];
 707         struct blob_attr *cur;
 708         char *name_buf;
 709         char name[8];
 710
 711         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 712
 713         cur = tb[VIF_ATTR_DISABLED];
 714         if (cur && blobmsg_get_bool(cur))
 715                 return;
 716
 717         sprintf(name, "%d", wdev->vif_idx++);
 718
 719         vif = calloc_a(sizeof(*vif),
 720                        &name_buf, strlen(name) + 1);
 721         vif->name = strcpy(name_buf, name);
 722         vif->wdev = wdev;
 723         vif->config = data;
 724         vif->section = section;
 725         vif->isolate = false;
 726
 727         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 728 }
 729
 730 static void
 731 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 732 {
 733         void *i;
 734
 735         i = blobmsg_open_table(b, NULL);
 736         if (iface->section)
 737                 blobmsg_add_string(b, "section", iface->section);
 738         if (iface->ifname)
 739                 blobmsg_add_string(b, "ifname", iface->ifname);
 740         put_container(b, iface->config, "config");
 741         blobmsg_close_table(b, i);
 742 }
 743
 744 void
 745 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 746 {
 747         struct wireless_interface *iface;
 748         void *c, *i;
 749
 750         c = blobmsg_open_table(b, wdev->name);
 751         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 752         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 753         blobmsg_add_u8(b, "autostart", wdev->autostart);
 754         blobmsg_add_u8(b, "disabled", wdev->disabled);
 755         put_container(b, wdev->config, "config");
 756
 757         i = blobmsg_open_array(b, "interfaces");
 758         vlist_for_each_element(&wdev->interfaces, iface, node)
 759                 wireless_interface_status(iface, b);
 760         blobmsg_close_array(b, i);
 761         blobmsg_close_table(b, c);
 762 }
 763
 764 void
 765 wireless_device_get_validate(struct wireless_device *wdev, struct blob_buf *b)
 766 {
 767         struct uci_blob_param_list *p;
 768         void *c, *d;
 769         int i;
 770
 771         c = blobmsg_open_table(b, wdev->name);
 772
 773         d = blobmsg_open_table(b, "device");
 774         p = wdev->drv->device.config;
 775         for (i = 0; i < p->n_params; i++)
 776                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 777         blobmsg_close_table(b, d);
 778
 779         d = blobmsg_open_table(b, "interface");
 780         p = wdev->drv->interface.config;
 781         for (i = 0; i < p->n_params; i++)
 782                 blobmsg_add_string(b, p->params[i].name, uci_get_validate_string(p, i));
 783         blobmsg_close_table(b, d);
 784
 785         blobmsg_close_table(b, c);
 786 }
 787
 788 static void
 789 wireless_interface_set_data(struct wireless_interface *vif)
 790 {
 791         enum {
 792                 VIF_DATA_IFNAME,
 793                 __VIF_DATA_MAX,
 794         };
 795         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 796                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 797         };
 798         struct blob_attr *tb[__VIF_DATA_MAX];
 799         struct blob_attr *cur;
 800
 801         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 802                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 803
 804         if ((cur = tb[VIF_DATA_IFNAME]))
 805                 vif->ifname = blobmsg_data(cur);
 806 }
 807
 808 static int
 809 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 810 {
 811         enum {
 812                 PROC_ATTR_PID,
 813                 PROC_ATTR_EXE,
 814                 PROC_ATTR_REQUIRED,
 815                 __PROC_ATTR_MAX
 816         };
 817         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 818                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 819                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 820                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 821         };
 822         struct blob_attr *tb[__PROC_ATTR_MAX];
 823         struct wireless_process *proc;
 824         char *name;
 825         int pid;
 826
 827         if (!data)
 828                 return UBUS_STATUS_INVALID_ARGUMENT;
 829
 830         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 831         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 832                 return UBUS_STATUS_INVALID_ARGUMENT;
 833
 834         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 835         if (pid < 2)
 836                 return UBUS_STATUS_INVALID_ARGUMENT;
 837
 838         proc = calloc_a(sizeof(*proc),
 839                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 840
 841         proc->pid = pid;
 842         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 843
 844         if (tb[PROC_ATTR_REQUIRED])
 845                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 846
 847         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 848         list_add(&proc->list, &wdev->script_proc);
 849         uloop_timeout_set(&wdev->script_check, 0);
 850
 851         return 0;
 852 }
 853
 854 static int
 855 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 856                                  struct ubus_request_data *req)
 857 {
 858         enum {
 859                 KILL_ATTR_SIGNAL,
 860                 KILL_ATTR_IMMEDIATE,
 861                 __KILL_ATTR_MAX
 862         };
 863         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 864                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 865                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 866         };
 867         struct blob_attr *tb[__KILL_ATTR_MAX];
 868         struct blob_attr *cur;
 869         bool immediate = false;
 870         int signal = SIGTERM;
 871
 872         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 873
 874         if ((cur = tb[KILL_ATTR_SIGNAL]))
 875                 signal = blobmsg_get_u32(cur);
 876
 877         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 878                 immediate = blobmsg_get_bool(cur);
 879
 880         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 881                 return UBUS_STATUS_PERMISSION_DENIED;
 882
 883         wireless_process_kill_all(wdev, signal, immediate);
 884
 885         if (list_empty(&wdev->script_proc))
 886                 return 0;
 887
 888         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 889         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 890
 891         return 0;
 892 }
 893
 894 static int
 895 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 896 {
 897         static const struct blobmsg_policy retry_policy = {
 898                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 899         };
 900         struct blob_attr *val;
 901
 902         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 903         if (!val)
 904                 return UBUS_STATUS_INVALID_ARGUMENT;
 905
 906         wdev->retry = blobmsg_get_u32(val);
 907         return 0;
 908 }
 909
 910 enum {
 911         NOTIFY_CMD_UP = 0,
 912         NOTIFY_CMD_SET_DATA = 1,
 913         NOTIFY_CMD_PROCESS_ADD = 2,
 914         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 915         NOTIFY_CMD_SET_RETRY = 4,
 916 };
 917
 918 int
 919 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 920                        struct ubus_request_data *req)
 921 {
 922         enum {
 923                 NOTIFY_ATTR_COMMAND,
 924                 NOTIFY_ATTR_VIF,
 925                 NOTIFY_ATTR_DATA,
 926                 __NOTIFY_MAX,
 927         };
 928         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 929                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 930                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 931                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 932         };
 933         struct wireless_interface *vif = NULL;
 934         struct blob_attr *tb[__NOTIFY_MAX];
 935         struct blob_attr *cur, **pdata;
 936
 937         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 938
 939         if (!tb[NOTIFY_ATTR_COMMAND])
 940                 return UBUS_STATUS_INVALID_ARGUMENT;
 941
 942         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 943                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 944                 if (!vif)
 945                         return UBUS_STATUS_NOT_FOUND;
 946         }
 947
 948         cur = tb[NOTIFY_ATTR_DATA];
 949         if (!cur)
 950                 return UBUS_STATUS_INVALID_ARGUMENT;
 951
 952         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 953         case NOTIFY_CMD_UP:
 954                 if (vif)
 955                         return UBUS_STATUS_INVALID_ARGUMENT;
 956
 957                 if (wdev->state != IFS_SETUP)
 958                         return UBUS_STATUS_PERMISSION_DENIED;
 959
 960                 wireless_device_mark_up(wdev);
 961                 break;
 962         case NOTIFY_CMD_SET_DATA:
 963                 if (vif)
 964                         pdata = &vif->data;
 965                 else
 966                         pdata = &wdev->data;
 967
 968                 if (*pdata)
 969                         return UBUS_STATUS_INVALID_ARGUMENT;
 970
 971                 *pdata = blob_memdup(cur);
 972                 if (vif)
 973                         wireless_interface_set_data(vif);
 974                 break;
 975         case NOTIFY_CMD_PROCESS_ADD:
 976                 return wireless_device_add_process(wdev, cur);
 977         case NOTIFY_CMD_PROCESS_KILL_ALL:
 978                 return wireless_device_process_kill_all(wdev, cur, req);
 979         case NOTIFY_CMD_SET_RETRY:
 980                 return wireless_device_set_retry(wdev, cur);
 981         default:
 982                 return UBUS_STATUS_INVALID_ARGUMENT;
 983         }
 984
 985         return 0;
 986 }
 987
 988 void
 989 wireless_start_pending(void)
 990 {
 991         struct wireless_device *wdev;
 992
 993         vlist_for_each_element(&wireless_devices, wdev, node)
 994                 if (wdev->autostart)
 995                         __wireless_device_set_up(wdev);
 996 }