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