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         D(WIRELESS, "Cancel wireless device '%s' setup\n", wdev->name);
 201         wdev->cancel = true;
 202         uloop_timeout_set(&wdev->timeout, 10 * 1000);
 203 }
 204
 205 static void
 206 wireless_device_run_handler(struct wireless_device *wdev, bool up)
 207 {
 208         const char *action = up ? "setup" : "teardown";
 209         const char *argv[6];
 210         char *config;
 211         int i = 0;
 212         int fds[2] = { -1, -1 };
 213
 214         D(WIRELESS, "Wireless device '%s' run %s handler\n", wdev->name, action);
 215         prepare_config(wdev, &b, up);
 216         config = blobmsg_format_json(b.head, true);
 217
 218         argv[i++] = wdev->drv->script;
 219         argv[i++] = wdev->drv->name;
 220         argv[i++] = action;
 221         argv[i++] = wdev->name;
 222         argv[i++] = config;
 223         argv[i] = NULL;
 224
 225         if (up && pipe(fds) == 0) {
 226                 wdev->script_proc_fd.fd = fds[0];
 227                 uloop_fd_add(&wdev->script_proc_fd,
 228                              ULOOP_READ | ULOOP_EDGE_TRIGGER);
 229         }
 230
 231         netifd_start_process(argv, NULL, &wdev->script_task);
 232
 233         if (fds[1] >= 0)
 234                 close(fds[1]);
 235
 236         free(config);
 237 }
 238
 239 static void
 240 __wireless_device_set_up(struct wireless_device *wdev)
 241 {
 242         if (wdev->state != IFS_DOWN || config_init)
 243                 return;
 244
 245         wdev->state = IFS_SETUP;
 246         wireless_device_run_handler(wdev, true);
 247 }
 248
 249 static void
 250 wireless_device_mark_down(struct wireless_device *wdev)
 251 {
 252         struct wireless_interface *vif;
 253
 254         D(WIRELESS, "Wireless device '%s' is now down\n", wdev->name);
 255
 256         vlist_for_each_element(&wdev->interfaces, vif, node)
 257                 wireless_interface_handle_link(vif, false);
 258
 259         wireless_process_kill_all(wdev, SIGTERM, true);
 260
 261         wdev->state = IFS_DOWN;
 262         wireless_device_free_state(wdev);
 263
 264         if (wdev->autostart)
 265                 __wireless_device_set_up(wdev);
 266 }
 267
 268 static void
 269 wireless_device_mark_up(struct wireless_device *wdev)
 270 {
 271         struct wireless_interface *vif;
 272
 273         D(WIRELESS, "Wireless device '%s' is now up\n", wdev->name);
 274         wdev->state = IFS_UP;
 275         vlist_for_each_element(&wdev->interfaces, vif, node)
 276                 wireless_interface_handle_link(vif, true);
 277 }
 278
 279 static void
 280 wireless_device_setup_timeout(struct uloop_timeout *timeout)
 281 {
 282         struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
 283
 284         netifd_kill_process(&wdev->script_task);
 285         wdev->script_task.cb(&wdev->script_task, -1);
 286         wireless_device_mark_down(wdev);
 287 }
 288
 289 void
 290 wireless_device_set_up(struct wireless_device *wdev)
 291 {
 292         wdev->retry = WIRELESS_SETUP_RETRY;
 293         wdev->autostart = true;
 294         __wireless_device_set_up(wdev);
 295 }
 296
 297 static void
 298 __wireless_device_set_down(struct wireless_device *wdev)
 299 {
 300         if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
 301                 return;
 302
 303         if (wdev->script_task.uloop.pending) {
 304                 wireless_device_setup_cancel(wdev);
 305                 return;
 306         }
 307
 308         wdev->state = IFS_TEARDOWN;
 309         wireless_device_run_handler(wdev, false);
 310 }
 311
 312 static void
 313 wireless_device_retry_setup(struct wireless_device *wdev)
 314 {
 315         if (--wdev->retry < 0)
 316                 wdev->autostart = false;
 317
 318         __wireless_device_set_down(wdev);
 319 }
 320
 321 static void
 322 wireless_device_script_task_cb(struct netifd_process *proc, int ret)
 323 {
 324         struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
 325
 326         switch (wdev->state) {
 327         case IFS_SETUP:
 328                 wireless_device_retry_setup(wdev);
 329                 break;
 330         case IFS_TEARDOWN:
 331                 wireless_device_mark_down(wdev);
 332                 break;
 333         default:
 334                 break;
 335         }
 336 }
 337
 338 void
 339 wireless_device_set_down(struct wireless_device *wdev)
 340 {
 341         wdev->autostart = false;
 342         __wireless_device_set_down(wdev);
 343 }
 344
 345 static void
 346 wireless_device_free(struct wireless_device *wdev)
 347 {
 348     vlist_flush_all(&wdev->interfaces);
 349     free(wdev->config);
 350     free(wdev);
 351 }
 352
 353 static void
 354 wdev_handle_config_change(struct wireless_device *wdev)
 355 {
 356         enum interface_config_state state = wdev->config_state;
 357
 358         wdev->config_state = IFC_NORMAL;
 359         switch(state) {
 360         case IFC_NORMAL:
 361                 break;
 362         case IFC_RELOAD:
 363                 if (wdev->autostart)
 364                         __wireless_device_set_up(wdev);
 365                 break;
 366         case IFC_REMOVE:
 367                 wireless_device_free(wdev);
 368                 break;
 369         }
 370 }
 371
 372 static void
 373 wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
 374 {
 375         enum interface_config_state old_state = wdev->config_state;
 376
 377         wdev->config_state = s;
 378         if (old_state != IFC_NORMAL)
 379                 return;
 380
 381         if (wdev->state == IFS_DOWN)
 382                 wdev_handle_config_change(wdev);
 383         else
 384                 __wireless_device_set_down(wdev);
 385 }
 386
 387 static void
 388 wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
 389 {
 390         struct blob_attr *new_config = wd_new->config;
 391
 392         free(wd_new);
 393
 394         if (blob_attr_equal(wdev->config, new_config))
 395                 return;
 396
 397         D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
 398         free(wdev->config);
 399         wdev->config = blob_memdup(new_config);
 400         wdev_set_config_state(wdev, IFC_RELOAD);
 401 }
 402
 403 static void
 404 wdev_create(struct wireless_device *wdev)
 405 {
 406         wdev->retry = WIRELESS_SETUP_RETRY;
 407         wdev->config = blob_memdup(wdev->config);
 408 }
 409
 410 static void
 411 wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
 412             struct vlist_node *node_old)
 413 {
 414         struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
 415         struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
 416
 417         if (wd_old && wd_new) {
 418                 wdev_change_config(wd_old, wd_new);
 419         } else if (wd_old) {
 420                 D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
 421                 wdev_set_config_state(wd_old, IFC_REMOVE);
 422         } else if (wd_new) {
 423                 D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
 424                 wdev_create(wd_new);
 425         }
 426 }
 427
 428 static void
 429 wireless_add_handler(const char *script, const char *name, json_object *obj)
 430 {
 431         struct wireless_driver *drv;
 432         char *name_str, *script_str;
 433         json_object *dev_config_obj, *iface_config_obj;
 434         struct uci_blob_param_list *dev_config, *iface_config;
 435
 436         dev_config_obj = json_get_field(obj, "device", json_type_array);
 437         iface_config_obj = json_get_field(obj, "iface", json_type_array);
 438
 439         if (!dev_config_obj || !iface_config_obj)
 440                 return;
 441
 442         drv = calloc_a(sizeof(*drv),
 443                 &name_str, strlen(name) + 1,
 444                 &script_str, strlen(script) + 1,
 445                 &dev_config, sizeof(*dev_config) + sizeof(void *),
 446                 &iface_config, sizeof(*iface_config) + sizeof(void *));
 447
 448         drv->name = strcpy(name_str, name);
 449         drv->script = strcpy(script_str, script);
 450
 451         dev_config->n_next = 1;
 452         dev_config->next[0] = &wdev_param;
 453         drv->device.config = dev_config;
 454
 455         iface_config->n_next = 1;
 456         iface_config->next[0] = &vif_param;
 457         drv->interface.config = iface_config;
 458
 459         drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
 460         drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
 461
 462         drv->node.key = drv->name;
 463         avl_insert(&wireless_drivers, &drv->node);
 464         D(WIRELESS, "Add handler for script %s: %s\n", script, name);
 465 }
 466
 467 static void __init
 468 wireless_init_list(void)
 469 {
 470         vlist_init(&wireless_devices, avl_strcmp, wdev_update);
 471         wireless_devices.keep_old = true;
 472         wireless_devices.no_delete = true;
 473
 474         avl_init(&wireless_drivers, avl_strcmp, false, NULL);
 475         drv_fd = netifd_open_subdir("wireless");
 476         if (drv_fd < 0)
 477                 return;
 478
 479         netifd_init_script_handlers(drv_fd, wireless_add_handler);
 480 }
 481
 482 static void
 483 wireless_interface_init_config(struct wireless_interface *vif)
 484 {
 485         struct blob_attr *tb[__VIF_ATTR_MAX];
 486         struct blob_attr *cur;
 487
 488         vif->network = NULL;
 489         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
 490
 491         if ((cur = tb[VIF_ATTR_NETWORK]))
 492                 vif->network = blobmsg_data(cur);
 493 }
 494
 495 static void
 496 vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
 497            struct vlist_node *node_old)
 498 {
 499         struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
 500         struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
 501         struct wireless_device *wdev;
 502
 503         if (vif_old)
 504                 wdev = vif_old->wdev;
 505         else
 506                 wdev = vif_new->wdev;
 507
 508         if (vif_old && vif_new) {
 509                 vif_old->section = vif_new->section;
 510                 if (blob_attr_equal(vif_old->config, vif_new->config)) {
 511                         free(vif_new);
 512                         return;
 513                 }
 514
 515                 D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
 516                 free(vif_old->config);
 517                 vif_old->config = blob_memdup(vif_new->config);
 518                 wireless_interface_init_config(vif_old);
 519                 free(vif_new);
 520         } else if (vif_new) {
 521                 D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
 522                 vif_new->config = blob_memdup(vif_new->config);
 523                 wireless_interface_init_config(vif_new);
 524         } else if (vif_old) {
 525                 D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
 526                 free(vif_old->config);
 527                 free(vif_old);
 528         }
 529
 530         wdev_set_config_state(wdev, IFC_RELOAD);
 531 }
 532
 533 static void
 534 wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
 535 {
 536         struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
 537         char buf[128];
 538
 539         while (1) {
 540                 int b = read(fd->fd, buf, sizeof(buf));
 541                 if (b < 0) {
 542                         if (errno == EINTR)
 543                                 continue;
 544
 545                         if (errno == EAGAIN)
 546                                 return;
 547
 548                         goto done;
 549                 }
 550
 551                 if (!b)
 552                         goto done;
 553         }
 554
 555 done:
 556         uloop_timeout_set(&wdev->script_check, 0);
 557         wireless_close_script_proc_fd(wdev);
 558 }
 559
 560 static void
 561 wireless_device_check_script_tasks(struct uloop_timeout *timeout)
 562 {
 563         struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
 564         struct wireless_process *proc, *tmp;
 565         bool restart = false;
 566
 567         list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
 568                 if (wireless_process_check(proc))
 569                         continue;
 570
 571                 D(WIRELESS, "Wireless device '%s' pid %d has terminated\n", wdev->name, proc->pid);
 572                 if (proc->required)
 573                         restart = true;
 574
 575                 wireless_process_free(wdev, proc);
 576         }
 577
 578         if (restart)
 579                 wireless_device_retry_setup(wdev);
 580         else
 581                 uloop_timeout_set(&wdev->script_check, 1000);
 582 }
 583
 584 void
 585 wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
 586 {
 587         struct wireless_device *wdev;
 588         char *name_buf;
 589         struct blob_attr *disabled;
 590
 591         blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
 592         if (disabled && blobmsg_get_bool(disabled))
 593                 return;
 594
 595         wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
 596         wdev->drv = drv;
 597         wdev->state = IFS_DOWN;
 598         wdev->config_state = IFC_NORMAL;
 599         wdev->name = strcpy(name_buf, name);
 600         wdev->config = data;
 601         wdev->config_autostart = true;
 602         wdev->autostart = wdev->config_autostart;
 603         INIT_LIST_HEAD(&wdev->script_proc);
 604         vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
 605         wdev->interfaces.keep_old = true;
 606         wdev->interfaces.no_delete = true;
 607         vlist_add(&wireless_devices, &wdev->node, wdev->name);
 608
 609         wdev->timeout.cb = wireless_device_setup_timeout;
 610         wdev->script_task.cb = wireless_device_script_task_cb;
 611         wdev->script_task.dir_fd = drv_fd;
 612         wdev->script_task.log_prefix = wdev->name;
 613
 614         wdev->script_proc_fd.fd = -1;
 615         wdev->script_proc_fd.cb = wireless_proc_poll_fd;
 616
 617         wdev->script_check.cb = wireless_device_check_script_tasks;
 618 }
 619
 620 void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data, const char *section)
 621 {
 622         struct wireless_interface *vif;
 623         struct blob_attr *tb[__VIF_ATTR_MAX];
 624         struct blob_attr *cur;
 625         char *name_buf;
 626         char name[8];
 627
 628         blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
 629
 630         cur = tb[VIF_ATTR_DISABLED];
 631         if (cur && blobmsg_get_bool(cur))
 632                 return;
 633
 634         sprintf(name, "%d", wdev->vif_idx++);
 635
 636         vif = calloc_a(sizeof(*vif), &name_buf, strlen(name) + 1);
 637         vif->name = strcpy(name_buf, name);
 638         vif->wdev = wdev;
 639         vif->config = data;
 640         vif->section = section;
 641         vlist_add(&wdev->interfaces, &vif->node, vif->name);
 642 }
 643
 644 static void
 645 wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
 646 {
 647         void *i;
 648
 649         i = blobmsg_open_table(b, iface->name);
 650         if (iface->section)
 651                 blobmsg_add_string(b, "section", iface->section);
 652         if (iface->ifname)
 653                 blobmsg_add_string(b, "ifname", iface->ifname);
 654         if (iface->data)
 655                 blob_put_raw(b, blob_data(iface->data), blob_len(iface->data));
 656         blobmsg_close_table(b, i);
 657 }
 658
 659 void
 660 wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
 661 {
 662         struct wireless_interface *iface;
 663         void *c, *i;
 664
 665         c = blobmsg_open_table(b, wdev->name);
 666         blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
 667         blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
 668         blobmsg_add_u8(b, "autostart", wdev->autostart);
 669         i = blobmsg_open_table(b, "interfaces");
 670         vlist_for_each_element(&wdev->interfaces, iface, node)
 671                 wireless_interface_status(iface, b);
 672         blobmsg_close_table(b, i);
 673         blobmsg_close_table(b, c);
 674 }
 675
 676 static void
 677 wireless_interface_set_data(struct wireless_interface *vif)
 678 {
 679         enum {
 680                 VIF_DATA_IFNAME,
 681                 __VIF_DATA_MAX,
 682         };
 683         static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
 684                 [VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 685         };
 686         struct blob_attr *tb[__VIF_DATA_MAX];
 687         struct blob_attr *cur;
 688
 689         blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
 690                       blobmsg_data(vif->data), blobmsg_data_len(vif->data));
 691
 692         if ((cur = tb[VIF_DATA_IFNAME]))
 693                 vif->ifname = blobmsg_data(cur);
 694 }
 695
 696 static int
 697 wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
 698 {
 699         enum {
 700                 PROC_ATTR_PID,
 701                 PROC_ATTR_EXE,
 702                 PROC_ATTR_REQUIRED,
 703                 __PROC_ATTR_MAX
 704         };
 705         static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
 706                 [PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 707                 [PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
 708                 [PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
 709         };
 710         struct blob_attr *tb[__PROC_ATTR_MAX];
 711         struct wireless_process *proc;
 712         char *name;
 713         int pid;
 714
 715         if (!data)
 716                 return UBUS_STATUS_INVALID_ARGUMENT;
 717
 718         blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 719         if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
 720                 return UBUS_STATUS_INVALID_ARGUMENT;
 721
 722         pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
 723         if (pid < 2)
 724                 return UBUS_STATUS_INVALID_ARGUMENT;
 725
 726         proc = calloc_a(sizeof(*proc),
 727                 &name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
 728
 729         proc->pid = pid;
 730         proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
 731
 732         if (tb[PROC_ATTR_REQUIRED])
 733                 proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
 734
 735         D(WIRELESS, "Wireless device '%s' add pid %d\n", wdev->name, proc->pid);
 736         list_add(&proc->list, &wdev->script_proc);
 737         uloop_timeout_set(&wdev->script_check, 0);
 738
 739         return 0;
 740 }
 741
 742 static int
 743 wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
 744                                  struct ubus_request_data *req)
 745 {
 746         enum {
 747                 KILL_ATTR_SIGNAL,
 748                 KILL_ATTR_IMMEDIATE,
 749                 __KILL_ATTR_MAX
 750         };
 751         static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
 752                 [KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 753                 [KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
 754         };
 755         struct blob_attr *tb[__KILL_ATTR_MAX];
 756         struct blob_attr *cur;
 757         bool immediate = false;
 758         int signal = SIGTERM;
 759
 760         blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
 761
 762         if ((cur = tb[KILL_ATTR_SIGNAL]))
 763                 signal = blobmsg_get_u32(cur);
 764
 765         if ((cur = tb[KILL_ATTR_IMMEDIATE]))
 766                 immediate = blobmsg_get_bool(cur);
 767
 768         if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
 769                 return UBUS_STATUS_PERMISSION_DENIED;
 770
 771         wireless_process_kill_all(wdev, signal, immediate);
 772
 773         if (list_empty(&wdev->script_proc))
 774                 return 0;
 775
 776         wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
 777         ubus_defer_request(ubus_ctx, req, wdev->kill_request);
 778
 779         return 0;
 780 }
 781
 782 static int
 783 wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
 784 {
 785         static const struct blobmsg_policy retry_policy = {
 786                 .name = "retry", .type = BLOBMSG_TYPE_INT32
 787         };
 788         struct blob_attr *val;
 789
 790         blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
 791         if (!val)
 792                 return UBUS_STATUS_INVALID_ARGUMENT;
 793
 794         wdev->retry = blobmsg_get_u32(val);
 795         return 0;
 796 }
 797
 798 enum {
 799         NOTIFY_CMD_UP = 0,
 800         NOTIFY_CMD_SET_DATA = 1,
 801         NOTIFY_CMD_PROCESS_ADD = 2,
 802         NOTIFY_CMD_PROCESS_KILL_ALL = 3,
 803         NOTIFY_CMD_SET_RETRY = 4,
 804 };
 805
 806 int
 807 wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
 808                        struct ubus_request_data *req)
 809 {
 810         enum {
 811                 NOTIFY_ATTR_COMMAND,
 812                 NOTIFY_ATTR_VIF,
 813                 NOTIFY_ATTR_DATA,
 814                 __NOTIFY_MAX,
 815         };
 816         static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
 817                 [NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
 818                 [NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
 819                 [NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 820         };
 821         struct wireless_interface *vif = NULL;
 822         struct blob_attr *tb[__NOTIFY_MAX];
 823         struct blob_attr *cur, **pdata;
 824
 825         blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
 826
 827         if (!tb[NOTIFY_ATTR_COMMAND])
 828                 return UBUS_STATUS_INVALID_ARGUMENT;
 829
 830         if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
 831                 vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
 832                 if (!vif)
 833                         return UBUS_STATUS_NOT_FOUND;
 834         }
 835
 836         cur = tb[NOTIFY_ATTR_DATA];
 837         if (!cur)
 838                 return UBUS_STATUS_INVALID_ARGUMENT;
 839
 840         switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
 841         case NOTIFY_CMD_UP:
 842                 if (vif)
 843                         return UBUS_STATUS_INVALID_ARGUMENT;
 844
 845                 if (wdev->state != IFS_SETUP)
 846                         return UBUS_STATUS_PERMISSION_DENIED;
 847
 848                 if (wdev->cancel)
 849                         return 0;
 850
 851                 wireless_device_mark_up(wdev);
 852                 break;
 853         case NOTIFY_CMD_SET_DATA:
 854                 if (vif)
 855                         pdata = &vif->data;
 856                 else
 857                         pdata = &wdev->data;
 858
 859                 if (*pdata)
 860                         return UBUS_STATUS_INVALID_ARGUMENT;
 861
 862                 *pdata = blob_memdup(cur);
 863                 if (vif)
 864                         wireless_interface_set_data(vif);
 865                 break;
 866         case NOTIFY_CMD_PROCESS_ADD:
 867                 return wireless_device_add_process(wdev, cur);
 868         case NOTIFY_CMD_PROCESS_KILL_ALL:
 869                 return wireless_device_process_kill_all(wdev, cur, req);
 870         case NOTIFY_CMD_SET_RETRY:
 871                 return wireless_device_set_retry(wdev, cur);
 872         default:
 873                 return UBUS_STATUS_INVALID_ARGUMENT;
 874         }
 875
 876         return 0;
 877 }
 878
 879 void
 880 wireless_start_pending(void)
 881 {
 882         struct wireless_device *wdev;
 883
 884         vlist_for_each_element(&wireless_devices, wdev, node)
 885                 if (wdev->autostart)
 886                         __wireless_device_set_up(wdev);
 887 }