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