device.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 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 <string.h>
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <assert.h>
  18
  19 #include <sys/types.h>
  20 #include <sys/socket.h>
  21
  22 #include <libubox/list.h>
  23
  24 #include "netifd.h"
  25 #include "system.h"
  26 #include "config.h"
  27 #include "wireless.h"
  28
  29 static struct list_head devtypes = LIST_HEAD_INIT(devtypes);
  30 static struct avl_tree devices;
  31
  32 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
  33         [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
  34         [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
  35         [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
  36         [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
  37         [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
  38         [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
  39         [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
  40         [DEV_ATTR_IP6SEGMENTROUTING] = { .name = "ip6segmentrouting", .type = BLOBMSG_TYPE_BOOL },
  41         [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
  42         [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
  43         [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
  44         [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
  45         [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
  46         [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
  47         [DEV_ATTR_NEIGHGCSTALETIME] = { .name = "neighgcstaletime", .type = BLOBMSG_TYPE_INT32 },
  48         [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
  49         [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
  50         [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
  51         [DEV_ATTR_MULTICAST_FAST_LEAVE] = { .name = "multicast_fast_leave", . type = BLOBMSG_TYPE_BOOL },
  52         [DEV_ATTR_MULTICAST] = { .name ="multicast", .type = BLOBMSG_TYPE_BOOL },
  53         [DEV_ATTR_LEARNING] = { .name ="learning", .type = BLOBMSG_TYPE_BOOL },
  54         [DEV_ATTR_UNICAST_FLOOD] = { .name ="unicast_flood", .type = BLOBMSG_TYPE_BOOL },
  55         [DEV_ATTR_SENDREDIRECTS] = { .name = "sendredirects", .type = BLOBMSG_TYPE_BOOL },
  56         [DEV_ATTR_NEIGHLOCKTIME] = { .name = "neighlocktime", .type = BLOBMSG_TYPE_INT32 },
  57         [DEV_ATTR_ISOLATE] = { .name = "isolate", .type = BLOBMSG_TYPE_BOOL },
  58         [DEV_ATTR_DROP_V4_UNICAST_IN_L2_MULTICAST] = { .name = "drop_v4_unicast_in_l2_multicast", .type = BLOBMSG_TYPE_BOOL },
  59         [DEV_ATTR_DROP_V6_UNICAST_IN_L2_MULTICAST] = { .name = "drop_v6_unicast_in_l2_multicast", .type = BLOBMSG_TYPE_BOOL },
  60         [DEV_ATTR_DROP_GRATUITOUS_ARP] = { .name = "drop_gratuitous_arp", .type = BLOBMSG_TYPE_BOOL },
  61         [DEV_ATTR_DROP_UNSOLICITED_NA] = { .name = "drop_unsolicited_na", .type = BLOBMSG_TYPE_BOOL },
  62         [DEV_ATTR_ARP_ACCEPT] = { .name = "arp_accept", .type = BLOBMSG_TYPE_BOOL },
  63         [DEV_ATTR_AUTH] = { .name = "auth", .type = BLOBMSG_TYPE_BOOL },
  64         [DEV_ATTR_SPEED] = { .name = "speed", .type = BLOBMSG_TYPE_INT32 },
  65         [DEV_ATTR_DUPLEX] = { .name = "duplex", .type = BLOBMSG_TYPE_BOOL },
  66 };
  67
  68 const struct uci_blob_param_list device_attr_list = {
  69         .n_params = __DEV_ATTR_MAX,
  70         .params = dev_attrs,
  71 };
  72
  73 static int __devlock = 0;
  74
  75 int device_type_add(struct device_type *devtype)
  76 {
  77         if (device_type_get(devtype->name)) {
  78                 netifd_log_message(L_WARNING, "Device handler '%s' already exists\n",
  79                                    devtype->name);
  80                 return 1;
  81         }
  82
  83         netifd_log_message(L_NOTICE, "Added device handler type: %s\n",
  84                 devtype->name);
  85
  86         list_add(&devtype->list, &devtypes);
  87         return 0;
  88 }
  89
  90 struct device_type *
  91 device_type_get(const char *tname)
  92 {
  93         struct device_type *cur;
  94
  95         list_for_each_entry(cur, &devtypes, list)
  96                 if (!strcmp(cur->name, tname))
  97                         return cur;
  98
  99         return NULL;
 100 }
 101
 102 static int device_vlan_len(struct kvlist *kv, const void *data)
 103 {
 104         return sizeof(unsigned int);
 105 }
 106
 107 void device_vlan_update(bool done)
 108 {
 109         struct device *dev;
 110
 111         avl_for_each_element(&devices, dev, avl) {
 112                 if (!dev->vlans.update)
 113                         continue;
 114
 115                 if (!done) {
 116                         if (dev->vlan_aliases.get_len)
 117                                 kvlist_free(&dev->vlan_aliases);
 118                         else
 119                                 kvlist_init(&dev->vlan_aliases, device_vlan_len);
 120                         vlist_update(&dev->vlans);
 121                 } else {
 122                         vlist_flush(&dev->vlans);
 123
 124                         if (dev->type->vlan_update)
 125                                 dev->type->vlan_update(dev);
 126                 }
 127         }
 128 }
 129
 130 void device_stp_init(void)
 131 {
 132         struct device *dev;
 133
 134         avl_for_each_element(&devices, dev, avl) {
 135                 if (!dev->type->stp_init)
 136                         continue;
 137
 138                 dev->type->stp_init(dev);
 139         }
 140 }
 141
 142 static int set_device_state(struct device *dev, bool state)
 143 {
 144         if (state) {
 145                 /* Get ifindex for all devices being enabled so a valid  */
 146                 /* ifindex is in place avoiding possible race conditions */
 147                 device_set_ifindex(dev, system_if_resolve(dev));
 148                 if (!dev->ifindex)
 149                         return -1;
 150
 151                 system_if_get_settings(dev, &dev->orig_settings);
 152                 /* Only keep orig settings based on what needs to be set */
 153                 dev->orig_settings.valid_flags = dev->orig_settings.flags;
 154                 dev->orig_settings.flags &= dev->settings.flags;
 155                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 156
 157                 system_if_up(dev);
 158         } else {
 159                 system_if_down(dev);
 160                 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
 161         }
 162
 163         return 0;
 164 }
 165
 166 static int
 167 simple_device_set_state(struct device *dev, bool state)
 168 {
 169         struct device *pdev;
 170         int ret = 0;
 171
 172         pdev = dev->parent.dev;
 173         if (state && !pdev) {
 174                 pdev = system_if_get_parent(dev);
 175                 if (pdev)
 176                         device_add_user(&dev->parent, pdev);
 177         }
 178
 179         if (pdev) {
 180                 if (state)
 181                         ret = device_claim(&dev->parent);
 182                 else
 183                         device_release(&dev->parent);
 184
 185                 if (ret < 0)
 186                         return ret;
 187         }
 188         return set_device_state(dev, state);
 189 }
 190
 191 static struct device *
 192 simple_device_create(const char *name, struct device_type *devtype,
 193                      struct blob_attr *attr)
 194 {
 195         struct blob_attr *tb[__DEV_ATTR_MAX];
 196         struct device *dev = NULL;
 197
 198         /* device type is unused for simple devices */
 199         devtype = NULL;
 200
 201         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
 202         dev = device_get(name, true);
 203         if (!dev)
 204                 return NULL;
 205
 206         dev->set_state = simple_device_set_state;
 207         device_init_settings(dev, tb);
 208
 209         return dev;
 210 }
 211
 212 static void simple_device_free(struct device *dev)
 213 {
 214         if (dev->parent.dev)
 215                 device_remove_user(&dev->parent);
 216         free(dev);
 217 }
 218
 219 struct device_type simple_device_type = {
 220         .name = "Network device",
 221         .config_params = &device_attr_list,
 222
 223         .create = simple_device_create,
 224         .check_state = system_if_check,
 225         .free = simple_device_free,
 226 };
 227
 228 void
 229 device_merge_settings(struct device *dev, struct device_settings *n)
 230 {
 231         struct device_settings *os = &dev->orig_settings;
 232         struct device_settings *s = &dev->settings;
 233
 234         memset(n, 0, sizeof(*n));
 235         n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
 236         n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
 237         n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
 238                 s->txqueuelen : os->txqueuelen;
 239         memcpy(n->macaddr,
 240                 (s->flags & (DEV_OPT_MACADDR|DEV_OPT_DEFAULT_MACADDR) ? s->macaddr : os->macaddr),
 241                 sizeof(n->macaddr));
 242         n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
 243         n->ip6segmentrouting = s->flags & DEV_OPT_IP6SEGMENTROUTING ? s->ip6segmentrouting : os->ip6segmentrouting;
 244         n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
 245         n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
 246         n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
 247         n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
 248         n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
 249         n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 250                 s->neigh4reachabletime : os->neigh4reachabletime;
 251         n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
 252                 s->neigh6reachabletime : os->neigh6reachabletime;
 253         n->neigh4gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 254                 s->neigh4gcstaletime : os->neigh4gcstaletime;
 255         n->neigh6gcstaletime = s->flags & DEV_OPT_NEIGHGCSTALETIME ?
 256                 s->neigh6gcstaletime : os->neigh6gcstaletime;
 257         n->neigh4locktime = s->flags & DEV_OPT_NEIGHLOCKTIME ?
 258                 s->neigh4locktime : os->neigh4locktime;
 259         n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
 260                 s->dadtransmits : os->dadtransmits;
 261         n->multicast = s->flags & DEV_OPT_MULTICAST ?
 262                 s->multicast : os->multicast;
 263         n->multicast_to_unicast = s->multicast_to_unicast;
 264         n->multicast_router = s->multicast_router;
 265         n->multicast_fast_leave = s->multicast_fast_leave;
 266         n->learning = s->learning;
 267         n->unicast_flood = s->unicast_flood;
 268         n->sendredirects = s->flags & DEV_OPT_SENDREDIRECTS ?
 269                 s->sendredirects : os->sendredirects;
 270         n->drop_v4_unicast_in_l2_multicast = s->flags & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST ?
 271                 s->drop_v4_unicast_in_l2_multicast : os->drop_v4_unicast_in_l2_multicast;
 272         n->drop_v6_unicast_in_l2_multicast = s->flags & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST ?
 273                 s->drop_v6_unicast_in_l2_multicast : os->drop_v6_unicast_in_l2_multicast;
 274         n->drop_gratuitous_arp = s->flags & DEV_OPT_DROP_GRATUITOUS_ARP ?
 275                 s->drop_gratuitous_arp : os->drop_gratuitous_arp;
 276         n->drop_unsolicited_na = s->flags & DEV_OPT_DROP_UNSOLICITED_NA ?
 277                 s->drop_unsolicited_na : os->drop_unsolicited_na;
 278         n->arp_accept = s->flags & DEV_OPT_ARP_ACCEPT ?
 279                 s->arp_accept : os->arp_accept;
 280         n->auth = s->flags & DEV_OPT_AUTH ? s->auth : os->auth;
 281         n->speed = s->flags & DEV_OPT_SPEED ? s->speed : os->speed;
 282         n->duplex = s->flags & DEV_OPT_DUPLEX ? s->duplex : os->duplex;
 283         n->flags = s->flags | os->flags | os->valid_flags;
 284 }
 285
 286 void
 287 device_init_settings(struct device *dev, struct blob_attr **tb)
 288 {
 289         struct device_settings *s = &dev->settings;
 290         struct blob_attr *cur;
 291         struct ether_addr *ea;
 292         bool disabled = false;
 293
 294         s->flags = 0;
 295         if ((cur = tb[DEV_ATTR_ENABLED]))
 296                 disabled = !blobmsg_get_bool(cur);
 297
 298         if ((cur = tb[DEV_ATTR_MTU]) && blobmsg_get_u32(cur) >= 68) {
 299                 s->mtu = blobmsg_get_u32(cur);
 300                 s->flags |= DEV_OPT_MTU;
 301         }
 302
 303         if ((cur = tb[DEV_ATTR_MTU6]) && blobmsg_get_u32(cur) >= 1280) {
 304                 s->mtu6 = blobmsg_get_u32(cur);
 305                 s->flags |= DEV_OPT_MTU6;
 306         }
 307
 308         if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
 309                 s->txqueuelen = blobmsg_get_u32(cur);
 310                 s->flags |= DEV_OPT_TXQUEUELEN;
 311         }
 312
 313         if ((cur = tb[DEV_ATTR_MACADDR])) {
 314                 ea = ether_aton(blobmsg_data(cur));
 315                 if (ea) {
 316                         memcpy(s->macaddr, ea, 6);
 317                         s->flags |= DEV_OPT_MACADDR;
 318                 }
 319         }
 320
 321         if ((cur = tb[DEV_ATTR_IPV6])) {
 322                 s->ipv6 = blobmsg_get_bool(cur);
 323                 s->flags |= DEV_OPT_IPV6;
 324         }
 325
 326         if ((cur = tb[DEV_ATTR_IP6SEGMENTROUTING])) {
 327                 s->ip6segmentrouting = blobmsg_get_bool(cur);
 328                 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
 329         }
 330
 331         if ((cur = tb[DEV_ATTR_PROMISC])) {
 332                 s->promisc = blobmsg_get_bool(cur);
 333                 s->flags |= DEV_OPT_PROMISC;
 334         }
 335
 336         if ((cur = tb[DEV_ATTR_RPFILTER])) {
 337                 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
 338                         s->flags |= DEV_OPT_RPFILTER;
 339                 else
 340                         DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
 341         }
 342
 343         if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
 344                 s->acceptlocal = blobmsg_get_bool(cur);
 345                 s->flags |= DEV_OPT_ACCEPTLOCAL;
 346         }
 347
 348         if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
 349                 s->igmpversion = blobmsg_get_u32(cur);
 350                 if (s->igmpversion >= 1 && s->igmpversion <= 3)
 351                         s->flags |= DEV_OPT_IGMPVERSION;
 352                 else
 353                         DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
 354         }
 355
 356         if ((cur = tb[DEV_ATTR_MLDVERSION])) {
 357                 s->mldversion = blobmsg_get_u32(cur);
 358                 if (s->mldversion >= 1 && s->mldversion <= 2)
 359                         s->flags |= DEV_OPT_MLDVERSION;
 360                 else
 361                         DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
 362         }
 363
 364         if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
 365                 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
 366                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
 367         }
 368
 369         if ((cur = tb[DEV_ATTR_NEIGHGCSTALETIME])) {
 370                 s->neigh6gcstaletime = s->neigh4gcstaletime = blobmsg_get_u32(cur);
 371                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
 372         }
 373
 374         if ((cur = tb[DEV_ATTR_NEIGHLOCKTIME])) {
 375                 s->neigh4locktime = blobmsg_get_u32(cur);
 376                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
 377         }
 378
 379         if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
 380                 s->dadtransmits = blobmsg_get_u32(cur);
 381                 s->flags |= DEV_OPT_DADTRANSMITS;
 382         }
 383
 384         if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
 385                 s->multicast_to_unicast = blobmsg_get_bool(cur);
 386                 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
 387         }
 388
 389         if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
 390                 s->multicast_router = blobmsg_get_u32(cur);
 391                 if (s->multicast_router <= 2)
 392                         s->flags |= DEV_OPT_MULTICAST_ROUTER;
 393                 else
 394                         DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
 395         }
 396
 397         if ((cur = tb[DEV_ATTR_MULTICAST_FAST_LEAVE])) {
 398                 s->multicast_fast_leave = blobmsg_get_bool(cur);
 399                 s->flags |= DEV_OPT_MULTICAST_FAST_LEAVE;
 400         }
 401
 402         if ((cur = tb[DEV_ATTR_MULTICAST])) {
 403                 s->multicast = blobmsg_get_bool(cur);
 404                 s->flags |= DEV_OPT_MULTICAST;
 405         }
 406
 407         if ((cur = tb[DEV_ATTR_LEARNING])) {
 408                 s->learning = blobmsg_get_bool(cur);
 409                 s->flags |= DEV_OPT_LEARNING;
 410         }
 411
 412         if ((cur = tb[DEV_ATTR_UNICAST_FLOOD])) {
 413                 s->unicast_flood = blobmsg_get_bool(cur);
 414                 s->flags |= DEV_OPT_UNICAST_FLOOD;
 415         }
 416
 417         if ((cur = tb[DEV_ATTR_SENDREDIRECTS])) {
 418                 s->sendredirects = blobmsg_get_bool(cur);
 419                 s->flags |= DEV_OPT_SENDREDIRECTS;
 420         }
 421
 422         if ((cur = tb[DEV_ATTR_ISOLATE])) {
 423                 s->isolate = blobmsg_get_bool(cur);
 424                 s->flags |= DEV_OPT_ISOLATE;
 425         }
 426
 427         if ((cur = tb[DEV_ATTR_DROP_V4_UNICAST_IN_L2_MULTICAST])) {
 428                 s->drop_v4_unicast_in_l2_multicast = blobmsg_get_bool(cur);
 429                 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
 430         }
 431
 432         if ((cur = tb[DEV_ATTR_DROP_V6_UNICAST_IN_L2_MULTICAST])) {
 433                 s->drop_v6_unicast_in_l2_multicast = blobmsg_get_bool(cur);
 434                 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
 435         }
 436
 437         if ((cur = tb[DEV_ATTR_DROP_GRATUITOUS_ARP])) {
 438                 s->drop_gratuitous_arp = blobmsg_get_bool(cur);
 439                 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
 440         }
 441
 442         if ((cur = tb[DEV_ATTR_DROP_UNSOLICITED_NA])) {
 443                 s->drop_unsolicited_na = blobmsg_get_bool(cur);
 444                 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
 445         }
 446
 447         if ((cur = tb[DEV_ATTR_ARP_ACCEPT])) {
 448                 s->arp_accept = blobmsg_get_bool(cur);
 449                 s->flags |= DEV_OPT_ARP_ACCEPT;
 450         }
 451
 452         if ((cur = tb[DEV_ATTR_AUTH])) {
 453                 s->auth = blobmsg_get_bool(cur);
 454                 s->flags |= DEV_OPT_AUTH;
 455         }
 456
 457         if ((cur = tb[DEV_ATTR_SPEED])) {
 458                 s->speed = blobmsg_get_u32(cur);
 459                 s->flags |= DEV_OPT_SPEED;
 460         }
 461
 462         if ((cur = tb[DEV_ATTR_DUPLEX])) {
 463                 s->duplex = blobmsg_get_bool(cur);
 464                 s->flags |= DEV_OPT_DUPLEX;
 465         }
 466
 467         device_set_disabled(dev, disabled);
 468 }
 469
 470 static void __init dev_init(void)
 471 {
 472         avl_init(&devices, avl_strcmp, true, NULL);
 473 }
 474
 475 static int device_broadcast_cb(void *ctx, struct safe_list *list)
 476 {
 477         struct device_user *dep = container_of(list, struct device_user, list);
 478         int *ev = ctx;
 479
 480         /* device might have been removed by an earlier callback */
 481         if (!dep->dev)
 482                 return 0;
 483
 484         if (dep->cb)
 485                 dep->cb(dep, *ev);
 486         return 0;
 487 }
 488
 489 void device_broadcast_event(struct device *dev, enum device_event ev)
 490 {
 491         int dev_ev = ev;
 492
 493         safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
 494         safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
 495 }
 496
 497 static void
 498 device_fill_default_settings(struct device *dev)
 499 {
 500         struct device_settings *s = &dev->settings;
 501         struct ether_addr *ea;
 502
 503         if (!(s->flags & DEV_OPT_MACADDR)) {
 504                 ea = config_get_default_macaddr(dev->ifname);
 505                 if (ea) {
 506                         memcpy(s->macaddr, ea, 6);
 507                         s->flags |= DEV_OPT_DEFAULT_MACADDR;
 508                 }
 509         }
 510 }
 511
 512 int device_claim(struct device_user *dep)
 513 {
 514         struct device *dev = dep->dev;
 515         int ret = 0;
 516
 517         if (dep->claimed)
 518                 return 0;
 519
 520         if (!dev)
 521                 return -1;
 522
 523         dep->claimed = true;
 524         D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
 525         if (++dev->active != 1)
 526                 return 0;
 527
 528         device_broadcast_event(dev, DEV_EVENT_SETUP);
 529         device_fill_default_settings(dev);
 530         if (dev->external) {
 531                 /* Get ifindex for external claimed devices so a valid   */
 532                 /* ifindex is in place avoiding possible race conditions */
 533                 device_set_ifindex(dev, system_if_resolve(dev));
 534                 if (!dev->ifindex)
 535                         ret = -1;
 536
 537                 system_if_get_settings(dev, &dev->orig_settings);
 538         } else
 539                 ret = dev->set_state(dev, true);
 540
 541         if (ret == 0)
 542                 device_broadcast_event(dev, DEV_EVENT_UP);
 543         else {
 544                 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
 545                 dev->active = 0;
 546                 dep->claimed = false;
 547         }
 548
 549         return ret;
 550 }
 551
 552 void device_release(struct device_user *dep)
 553 {
 554         struct device *dev = dep->dev;
 555
 556         if (!dep->claimed)
 557                 return;
 558
 559         dep->claimed = false;
 560         dev->active--;
 561         D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
 562         assert(dev->active >= 0);
 563
 564         if (dev->active)
 565                 return;
 566
 567         device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
 568         if (!dev->external)
 569                 dev->set_state(dev, false);
 570
 571         if (dev->active)
 572                 return;
 573
 574         device_broadcast_event(dev, DEV_EVENT_DOWN);
 575 }
 576
 577 int device_check_state(struct device *dev)
 578 {
 579         if (!dev->type->check_state)
 580                 return simple_device_type.check_state(dev);
 581
 582         return dev->type->check_state(dev);
 583 }
 584
 585 int device_init_virtual(struct device *dev, struct device_type *type, const char *name)
 586 {
 587         assert(dev);
 588         assert(type);
 589
 590         D(DEVICE, "Initialize device '%s'\n", name ? name : "");
 591         INIT_SAFE_LIST(&dev->users);
 592         INIT_SAFE_LIST(&dev->aliases);
 593         dev->type = type;
 594
 595         if (name) {
 596                 int ret;
 597
 598                 ret = device_set_ifname(dev, name);
 599                 if (ret < 0)
 600                         return ret;
 601         }
 602
 603         if (!dev->set_state)
 604                 dev->set_state = set_device_state;
 605
 606         return 0;
 607 }
 608
 609 int device_init(struct device *dev, struct device_type *type, const char *ifname)
 610 {
 611         int ret;
 612
 613         ret = device_init_virtual(dev, type, ifname);
 614         if (ret < 0)
 615                 return ret;
 616
 617         dev->avl.key = dev->ifname;
 618
 619         ret = avl_insert(&devices, &dev->avl);
 620         if (ret < 0)
 621                 return ret;
 622
 623         system_if_clear_state(dev);
 624
 625         return 0;
 626 }
 627
 628 static struct device *
 629 device_create_default(const char *name, bool external)
 630 {
 631         struct device *dev;
 632
 633         if (!external && system_if_force_external(name))
 634                 return NULL;
 635
 636         D(DEVICE, "Create simple device '%s'\n", name);
 637         dev = calloc(1, sizeof(*dev));
 638         if (!dev)
 639                 return NULL;
 640
 641         dev->external = external;
 642         dev->set_state = simple_device_set_state;
 643
 644         if (device_init(dev, &simple_device_type, name) < 0) {
 645                 device_cleanup(dev);
 646                 free(dev);
 647                 return NULL;
 648         }
 649
 650         dev->default_config = true;
 651         if (external)
 652                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 653
 654         device_check_state(dev);
 655
 656         return dev;
 657 }
 658
 659 struct device *
 660 device_find(const char *name)
 661 {
 662         struct device *dev;
 663
 664         return avl_find_element(&devices, name, dev, avl);
 665 }
 666
 667 struct device *
 668 __device_get(const char *name, int create, bool check_vlan)
 669 {
 670         struct device *dev;
 671
 672         dev = avl_find_element(&devices, name, dev, avl);
 673
 674         if (!dev && check_vlan && strchr(name, '.'))
 675                 return get_vlan_device_chain(name, create);
 676
 677         if (name[0] == '@')
 678                 return device_alias_get(name + 1);
 679
 680         if (dev) {
 681                 if (create > 1 && !dev->external) {
 682                         system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 683                         dev->external = true;
 684                         device_set_present(dev, true);
 685                 }
 686                 return dev;
 687         }
 688
 689         if (!create)
 690                 return NULL;
 691
 692         return device_create_default(name, create > 1);
 693 }
 694
 695 static void
 696 device_delete(struct device *dev)
 697 {
 698         if (!dev->avl.key)
 699                 return;
 700
 701         D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
 702         avl_delete(&devices, &dev->avl);
 703         dev->avl.key = NULL;
 704 }
 705
 706 static int device_cleanup_cb(void *ctx, struct safe_list *list)
 707 {
 708         struct device_user *dep = container_of(list, struct device_user, list);
 709         if (dep->cb)
 710                 dep->cb(dep, DEV_EVENT_REMOVE);
 711
 712         device_release(dep);
 713         return 0;
 714 }
 715
 716 void device_cleanup(struct device *dev)
 717 {
 718         D(DEVICE, "Clean up device '%s'\n", dev->ifname);
 719         safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
 720         safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
 721         device_delete(dev);
 722 }
 723
 724 static void __device_set_present(struct device *dev, bool state)
 725 {
 726         if (dev->present == state)
 727                 return;
 728
 729         dev->present = state;
 730         device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
 731 }
 732
 733 void
 734 device_refresh_present(struct device *dev)
 735 {
 736         bool state = dev->sys_present;
 737
 738         if (dev->disabled || dev->deferred)
 739                 state = false;
 740
 741         __device_set_present(dev, state);
 742 }
 743
 744 void
 745 device_set_auth_status(struct device *dev, bool value)
 746 {
 747         if (dev->auth_status == value)
 748                 return;
 749
 750         dev->auth_status = value;
 751         if (!dev->present)
 752                 return;
 753
 754         if (dev->auth_status) {
 755                 device_broadcast_event(dev, DEV_EVENT_AUTH_UP);
 756                 return;
 757         }
 758
 759         device_broadcast_event(dev, DEV_EVENT_LINK_DOWN);
 760         if (!dev->link_active)
 761                 return;
 762
 763         device_broadcast_event(dev, DEV_EVENT_LINK_UP);
 764 }
 765
 766 void device_set_present(struct device *dev, bool state)
 767 {
 768         if (dev->sys_present == state)
 769                 return;
 770
 771         D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
 772         dev->sys_present = state;
 773         device_refresh_present(dev);
 774 }
 775
 776 void device_set_link(struct device *dev, bool state)
 777 {
 778         if (dev->link_active == state)
 779                 return;
 780
 781         netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
 782
 783         dev->link_active = state;
 784         if (!state)
 785                 dev->auth_status = false;
 786         device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
 787 }
 788
 789 void device_set_ifindex(struct device *dev, int ifindex)
 790 {
 791         if (dev->ifindex == ifindex)
 792                 return;
 793
 794         dev->ifindex = ifindex;
 795         device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
 796 }
 797
 798 int device_set_ifname(struct device *dev, const char *name)
 799 {
 800         int ret = 0;
 801
 802         if (!strcmp(dev->ifname, name))
 803                 return 0;
 804
 805         if (strlen(name) > sizeof(dev->ifname) - 1)
 806                 return -1;
 807
 808         if (dev->avl.key)
 809                 avl_delete(&devices, &dev->avl);
 810
 811         strcpy(dev->ifname, name);
 812
 813         if (dev->avl.key)
 814                 ret = avl_insert(&devices, &dev->avl);
 815
 816         if (ret == 0)
 817                 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFNAME);
 818
 819         return ret;
 820 }
 821
 822 static int device_refcount(struct device *dev)
 823 {
 824         struct list_head *list;
 825         int count = 0;
 826
 827         list_for_each(list, &dev->users.list)
 828                 count++;
 829
 830         list_for_each(list, &dev->aliases.list)
 831                 count++;
 832
 833         return count;
 834 }
 835
 836 static void
 837 __device_add_user(struct device_user *dep, struct device *dev)
 838 {
 839         struct safe_list *head;
 840
 841         dep->dev = dev;
 842
 843         if (dep->alias)
 844                 head = &dev->aliases;
 845         else
 846                 head = &dev->users;
 847
 848         safe_list_add(&dep->list, head);
 849         D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 850
 851         if (dep->cb && dev->present) {
 852                 dep->cb(dep, DEV_EVENT_ADD);
 853                 if (dev->active)
 854                         dep->cb(dep, DEV_EVENT_UP);
 855
 856                 if (dev->link_active)
 857                         dep->cb(dep, DEV_EVENT_LINK_UP);
 858         }
 859 }
 860
 861 void device_add_user(struct device_user *dep, struct device *dev)
 862 {
 863         if (dep->dev == dev)
 864                 return;
 865
 866         if (dep->dev)
 867                 device_remove_user(dep);
 868
 869         if (!dev)
 870                 return;
 871
 872         __device_add_user(dep, dev);
 873 }
 874
 875 static void
 876 device_free(struct device *dev)
 877 {
 878         __devlock++;
 879         free(dev->config);
 880         device_cleanup(dev);
 881         dev->type->free(dev);
 882         __devlock--;
 883 }
 884
 885 static void
 886 __device_free_unused(struct uloop_timeout *timeout)
 887 {
 888         struct device *dev, *tmp;
 889
 890         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 891                 if (!safe_list_empty(&dev->users) ||
 892                         !safe_list_empty(&dev->aliases) ||
 893                         dev->current_config)
 894                         continue;
 895
 896                 device_free(dev);
 897         }
 898 }
 899
 900 void device_free_unused(void)
 901 {
 902         static struct uloop_timeout free_timer = {
 903                 .cb = __device_free_unused,
 904         };
 905
 906         uloop_timeout_set(&free_timer, 1);
 907 }
 908
 909 void device_remove_user(struct device_user *dep)
 910 {
 911         struct device *dev = dep->dev;
 912
 913         if (!dep->dev)
 914                 return;
 915
 916         dep->hotplug = false;
 917         if (dep->claimed)
 918                 device_release(dep);
 919
 920         safe_list_del(&dep->list);
 921         dep->dev = NULL;
 922         D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
 923         device_free_unused();
 924 }
 925
 926 void
 927 device_init_pending(void)
 928 {
 929         struct device *dev, *tmp;
 930
 931         avl_for_each_element_safe(&devices, dev, avl, tmp) {
 932                 if (!dev->config_pending)
 933                         continue;
 934
 935                 dev->type->config_init(dev);
 936                 dev->config_pending = false;
 937                 device_check_state(dev);
 938         }
 939 }
 940
 941 bool
 942 device_check_ip6segmentrouting(void)
 943 {
 944         struct device *dev;
 945         bool ip6segmentrouting = false;
 946
 947         avl_for_each_element(&devices, dev, avl)
 948                 ip6segmentrouting |= dev->settings.ip6segmentrouting;
 949
 950         return ip6segmentrouting;
 951 }
 952
 953 static enum dev_change_type
 954 device_set_config(struct device *dev, struct device_type *type,
 955                   struct blob_attr *attr)
 956 {
 957         struct blob_attr *tb[__DEV_ATTR_MAX];
 958         const struct uci_blob_param_list *cfg = type->config_params;
 959
 960         if (type != dev->type)
 961                 return DEV_CONFIG_RECREATE;
 962
 963         if (dev->type->reload)
 964                 return dev->type->reload(dev, attr);
 965
 966         if (uci_blob_check_equal(dev->config, attr, cfg))
 967                 return DEV_CONFIG_NO_CHANGE;
 968
 969         if (cfg == &device_attr_list) {
 970                 memset(tb, 0, sizeof(tb));
 971
 972                 if (attr)
 973                         blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
 974                                 blob_data(attr), blob_len(attr));
 975
 976                 device_init_settings(dev, tb);
 977                 return DEV_CONFIG_RESTART;
 978         } else
 979                 return DEV_CONFIG_RECREATE;
 980 }
 981
 982 enum dev_change_type
 983 device_apply_config(struct device *dev, struct device_type *type,
 984                     struct blob_attr *config)
 985 {
 986         enum dev_change_type change;
 987
 988         change = device_set_config(dev, type, config);
 989         if (dev->external) {
 990                 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
 991                 change = DEV_CONFIG_APPLIED;
 992         }
 993
 994         switch (change) {
 995                 case DEV_CONFIG_RESTART:
 996                 case DEV_CONFIG_APPLIED:
 997                         D(DEVICE, "Device '%s': config applied\n", dev->ifname);
 998                         config = blob_memdup(config);
 999                         free(dev->config);
1000                         dev->config = config;
1001                         if (change == DEV_CONFIG_RESTART && dev->present) {
1002                                 int ret = 0;
1003
1004                                 device_set_present(dev, false);
1005                                 if (dev->active && !dev->external) {
1006                                         ret = dev->set_state(dev, false);
1007                                         if (!ret)
1008                                                 ret = dev->set_state(dev, true);
1009                                 }
1010                                 if (!ret)
1011                                         device_set_present(dev, true);
1012                         }
1013                         break;
1014                 case DEV_CONFIG_NO_CHANGE:
1015                         D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
1016                         break;
1017                 case DEV_CONFIG_RECREATE:
1018                         break;
1019         }
1020
1021         return change;
1022 }
1023
1024 static void
1025 device_replace(struct device *dev, struct device *odev)
1026 {
1027         struct device_user *dep, *tmp;
1028
1029         __devlock++;
1030         if (odev->present)
1031                 device_set_present(odev, false);
1032
1033         list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
1034                 device_release(dep);
1035                 safe_list_del(&dep->list);
1036                 __device_add_user(dep, dev);
1037         }
1038         __devlock--;
1039
1040         device_free(odev);
1041 }
1042
1043 void
1044 device_reset_config(void)
1045 {
1046         struct device *dev;
1047
1048         avl_for_each_element(&devices, dev, avl)
1049                 dev->current_config = false;
1050 }
1051
1052 void
1053 device_reset_old(void)
1054 {
1055         struct device *dev, *tmp, *ndev;
1056
1057         avl_for_each_element_safe(&devices, dev, avl, tmp) {
1058                 if (dev->current_config || dev->default_config)
1059                         continue;
1060
1061                 if (dev->type != &simple_device_type)
1062                         continue;
1063
1064                 ndev = device_create_default(dev->ifname, dev->external);
1065                 if (!ndev)
1066                         continue;
1067
1068                 device_replace(ndev, dev);
1069         }
1070 }
1071
1072 struct device *
1073 device_create(const char *name, struct device_type *type,
1074               struct blob_attr *config)
1075 {
1076         struct device *odev = NULL, *dev;
1077         enum dev_change_type change;
1078
1079         odev = device_find(name);
1080         if (odev) {
1081                 odev->current_config = true;
1082                 change = device_apply_config(odev, type, config);
1083                 switch (change) {
1084                 case DEV_CONFIG_RECREATE:
1085                         D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
1086                         device_delete(odev);
1087                         break;
1088                 default:
1089                         return odev;
1090                 }
1091         } else
1092                 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
1093
1094         config = blob_memdup(config);
1095         if (!config)
1096                 return NULL;
1097
1098         dev = type->create(name, type, config);
1099         if (!dev)
1100                 return NULL;
1101
1102         dev->current_config = true;
1103         dev->config = config;
1104         if (odev)
1105                 device_replace(dev, odev);
1106
1107         if (!config_init && dev->config_pending) {
1108                 type->config_init(dev);
1109                 dev->config_pending = false;
1110         }
1111
1112         device_check_state(dev);
1113
1114         return dev;
1115 }
1116
1117 void
1118 device_dump_status(struct blob_buf *b, struct device *dev)
1119 {
1120         struct device_settings st;
1121         void *c, *s;
1122
1123         if (!dev) {
1124                 avl_for_each_element(&devices, dev, avl) {
1125                         if (!dev->present)
1126                                 continue;
1127                         c = blobmsg_open_table(b, dev->ifname);
1128                         device_dump_status(b, dev);
1129                         blobmsg_close_table(b, c);
1130                 }
1131
1132                 return;
1133         }
1134
1135         blobmsg_add_u8(b, "external", dev->external);
1136         blobmsg_add_u8(b, "present", dev->present);
1137         blobmsg_add_string(b, "type", dev->type->name);
1138
1139         if (!dev->present)
1140                 return;
1141
1142         blobmsg_add_u8(b, "up", !!dev->active);
1143         blobmsg_add_u8(b, "carrier", !!dev->link_active);
1144         blobmsg_add_u8(b, "auth_status", !!dev->auth_status);
1145
1146         if (dev->type->dump_info)
1147                 dev->type->dump_info(dev, b);
1148         else
1149                 system_if_dump_info(dev, b);
1150
1151         if (dev->active) {
1152                 device_merge_settings(dev, &st);
1153                 if (st.flags & DEV_OPT_MTU)
1154                         blobmsg_add_u32(b, "mtu", st.mtu);
1155                 if (st.flags & DEV_OPT_MTU6)
1156                         blobmsg_add_u32(b, "mtu6", st.mtu6);
1157                 if (st.flags & DEV_OPT_MACADDR)
1158                         blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
1159                 if (st.flags & DEV_OPT_TXQUEUELEN)
1160                         blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
1161                 if (st.flags & DEV_OPT_IPV6)
1162                         blobmsg_add_u8(b, "ipv6", st.ipv6);
1163                 if (st.flags & DEV_OPT_IP6SEGMENTROUTING)
1164                         blobmsg_add_u8(b, "ip6segmentrouting", st.ip6segmentrouting);
1165                 if (st.flags & DEV_OPT_PROMISC)
1166                         blobmsg_add_u8(b, "promisc", st.promisc);
1167                 if (st.flags & DEV_OPT_RPFILTER)
1168                         blobmsg_add_u32(b, "rpfilter", st.rpfilter);
1169                 if (st.flags & DEV_OPT_ACCEPTLOCAL)
1170                         blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
1171                 if (st.flags & DEV_OPT_IGMPVERSION)
1172                         blobmsg_add_u32(b, "igmpversion", st.igmpversion);
1173                 if (st.flags & DEV_OPT_MLDVERSION)
1174                         blobmsg_add_u32(b, "mldversion", st.mldversion);
1175                 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
1176                         blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
1177                         blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
1178                 }
1179                 if (st.flags & DEV_OPT_NEIGHGCSTALETIME) {
1180                         blobmsg_add_u32(b, "neigh4gcstaletime", st.neigh4gcstaletime);
1181                         blobmsg_add_u32(b, "neigh6gcstaletime", st.neigh6gcstaletime);
1182                 }
1183                 if (st.flags & DEV_OPT_NEIGHLOCKTIME)
1184                         blobmsg_add_u32(b, "neigh4locktime", st.neigh4locktime);
1185                 if (st.flags & DEV_OPT_DADTRANSMITS)
1186                         blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
1187                 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
1188                         blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
1189                 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
1190                         blobmsg_add_u32(b, "multicast_router", st.multicast_router);
1191                 if (st.flags & DEV_OPT_MULTICAST_FAST_LEAVE)
1192                         blobmsg_add_u8(b, "multicast_fast_leave", st.multicast_fast_leave);
1193                 if (st.flags & DEV_OPT_MULTICAST)
1194                         blobmsg_add_u8(b, "multicast", st.multicast);
1195                 if (st.flags & DEV_OPT_LEARNING)
1196                         blobmsg_add_u8(b, "learning", st.learning);
1197                 if (st.flags & DEV_OPT_UNICAST_FLOOD)
1198                         blobmsg_add_u8(b, "unicast_flood", st.unicast_flood);
1199                 if (st.flags & DEV_OPT_SENDREDIRECTS)
1200                         blobmsg_add_u8(b, "sendredirects", st.sendredirects);
1201                 if (st.flags & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1202                         blobmsg_add_u8(b, "drop_v4_unicast_in_l2_multicast", st.drop_v4_unicast_in_l2_multicast);
1203                 if (st.flags & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1204                         blobmsg_add_u8(b, "drop_v6_unicast_in_l2_multicast", st.drop_v6_unicast_in_l2_multicast);
1205                 if (st.flags & DEV_OPT_DROP_GRATUITOUS_ARP)
1206                         blobmsg_add_u8(b, "drop_gratuitous_arp", st.drop_gratuitous_arp);
1207                 if (st.flags & DEV_OPT_DROP_UNSOLICITED_NA)
1208                         blobmsg_add_u8(b, "drop_unsolicited_na", st.drop_unsolicited_na);
1209                 if (st.flags & DEV_OPT_ARP_ACCEPT)
1210                         blobmsg_add_u8(b, "arp_accept", st.arp_accept);
1211                 if (st.flags & DEV_OPT_AUTH)
1212                         blobmsg_add_u8(b, "auth", st.auth);
1213         }
1214
1215         s = blobmsg_open_table(b, "statistics");
1216         if (dev->type->dump_stats)
1217                 dev->type->dump_stats(dev, b);
1218         else
1219                 system_if_dump_stats(dev, b);
1220         blobmsg_close_table(b, s);
1221 }
1222
1223 static void __init simple_device_type_init(void)
1224 {
1225         device_type_add(&simple_device_type);
1226 }
1227
1228 void device_hotplug_event(const char *name, bool add)
1229 {
1230         struct device *dev;
1231
1232         wireless_device_hotplug_event(name, add);
1233
1234         dev = device_find(name);
1235         if (!dev || dev->type != &simple_device_type)
1236                 return;
1237
1238         device_set_present(dev, add);
1239 }