hostapd/vlan_init.c

   1 /*
   2  * hostapd / VLAN initialization
   3  * Copyright 2003, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Alternatively, this software may be distributed under the terms of BSD
  12  * license.
  13  *
  14  * See README and COPYING for more details.
  15  */
  16
  17 #include "includes.h"
  18
  19 #include "common.h"
  20 #include "hostapd.h"
  21 #include "config.h"
  22 #include "vlan_init.h"
  23
  24
  25 #ifdef CONFIG_FULL_DYNAMIC_VLAN
  26
  27 #include <net/if.h>
  28 #include <sys/ioctl.h>
  29 #include <linux/sockios.h>
  30 #include <linux/if_vlan.h>
  31 #include <linux/if_bridge.h>
  32
  33 #include "drivers/priv_netlink.h"
  34 #include "eloop.h"
  35
  36
  37 struct full_dynamic_vlan {
  38         int s; /* socket on which to listen for new/removed interfaces. */
  39 };
  40
  41
  42 static int ifconfig_helper(const char *if_name, int up)
  43 {
  44         int fd;
  45         struct ifreq ifr;
  46
  47         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
  48                 perror("socket[AF_INET,SOCK_STREAM]");
  49                 return -1;
  50         }
  51
  52         os_memset(&ifr, 0, sizeof(ifr));
  53         os_strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
  54
  55         if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) {
  56                 perror("ioctl[SIOCGIFFLAGS]");
  57                 close(fd);
  58                 return -1;
  59         }
  60
  61         if (up)
  62                 ifr.ifr_flags |= IFF_UP;
  63         else
  64                 ifr.ifr_flags &= ~IFF_UP;
  65
  66         if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) {
  67                 perror("ioctl[SIOCSIFFLAGS]");
  68                 close(fd);
  69                 return -1;
  70         }
  71
  72         close(fd);
  73         return 0;
  74 }
  75
  76
  77 static int ifconfig_up(const char *if_name)
  78 {
  79         return ifconfig_helper(if_name, 1);
  80 }
  81
  82
  83 static int ifconfig_down(const char *if_name)
  84 {
  85         return ifconfig_helper(if_name, 0);
  86 }
  87
  88
  89 /*
  90  * These are only available in recent linux headers (without the leading
  91  * underscore).
  92  */
  93 #define _GET_VLAN_REALDEV_NAME_CMD      8
  94 #define _GET_VLAN_VID_CMD               9
  95
  96 /* This value should be 256 ONLY. If it is something else, then hostapd
  97  * might crash!, as this value has been hard-coded in 2.4.x kernel
  98  * bridging code.
  99  */
 100 #define MAX_BR_PORTS                    256
 101
 102 static int br_delif(const char *br_name, const char *if_name)
 103 {
 104         int fd;
 105         struct ifreq ifr;
 106         unsigned long args[2];
 107         int if_index;
 108
 109         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 110                 perror("socket[AF_INET,SOCK_STREAM]");
 111                 return -1;
 112         }
 113
 114         if_index = if_nametoindex(if_name);
 115
 116         if (if_index == 0) {
 117                 printf("Failure determining interface index for '%s'\n",
 118                        if_name);
 119                 close(fd);
 120                 return -1;
 121         }
 122
 123         args[0] = BRCTL_DEL_IF;
 124         args[1] = if_index;
 125
 126         os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name));
 127         ifr.ifr_data = (__caddr_t) args;
 128
 129         if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0 && errno != EINVAL) {
 130                 /* No error if interface already removed. */
 131                 perror("ioctl[SIOCDEVPRIVATE,BRCTL_DEL_IF]");
 132                 close(fd);
 133                 return -1;
 134         }
 135
 136         close(fd);
 137         return 0;
 138 }
 139
 140
 141 /*
 142         Add interface 'if_name' to the bridge 'br_name'
 143
 144         returns -1 on error
 145         returns 1 if the interface is already part of the bridge
 146         returns 0 otherwise
 147 */
 148 static int br_addif(const char *br_name, const char *if_name)
 149 {
 150         int fd;
 151         struct ifreq ifr;
 152         unsigned long args[2];
 153         int if_index;
 154
 155         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 156                 perror("socket[AF_INET,SOCK_STREAM]");
 157                 return -1;
 158         }
 159
 160         if_index = if_nametoindex(if_name);
 161
 162         if (if_index == 0) {
 163                 printf("Failure determining interface index for '%s'\n",
 164                        if_name);
 165                 close(fd);
 166                 return -1;
 167         }
 168
 169         args[0] = BRCTL_ADD_IF;
 170         args[1] = if_index;
 171
 172         os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name));
 173         ifr.ifr_data = (__caddr_t) args;
 174
 175         if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) {
 176                 if (errno == EBUSY) {
 177                         /* The interface is already added. */
 178                         close(fd);
 179                         return 1;
 180                 }
 181
 182                 perror("ioctl[SIOCDEVPRIVATE,BRCTL_ADD_IF]");
 183                 close(fd);
 184                 return -1;
 185         }
 186
 187         close(fd);
 188         return 0;
 189 }
 190
 191
 192 static int br_delbr(const char *br_name)
 193 {
 194         int fd;
 195         unsigned long arg[2];
 196
 197         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 198                 perror("socket[AF_INET,SOCK_STREAM]");
 199                 return -1;
 200         }
 201
 202         arg[0] = BRCTL_DEL_BRIDGE;
 203         arg[1] = (unsigned long) br_name;
 204
 205         if (ioctl(fd, SIOCGIFBR, arg) < 0 && errno != ENXIO) {
 206                 /* No error if bridge already removed. */
 207                 perror("ioctl[BRCTL_DEL_BRIDGE]");
 208                 close(fd);
 209                 return -1;
 210         }
 211
 212         close(fd);
 213         return 0;
 214 }
 215
 216
 217 /*
 218         Add a bridge with the name 'br_name'.
 219
 220         returns -1 on error
 221         returns 1 if the bridge already exists
 222         returns 0 otherwise
 223 */
 224 static int br_addbr(const char *br_name)
 225 {
 226         int fd;
 227         unsigned long arg[2];
 228
 229         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 230                 perror("socket[AF_INET,SOCK_STREAM]");
 231                 return -1;
 232         }
 233
 234         arg[0] = BRCTL_ADD_BRIDGE;
 235         arg[1] = (unsigned long) br_name;
 236
 237         if (ioctl(fd, SIOCGIFBR, arg) < 0) {
 238                 if (errno == EEXIST) {
 239                         /* The bridge is already added. */
 240                         close(fd);
 241                         return 1;
 242                 } else {
 243                         perror("ioctl[BRCTL_ADD_BRIDGE]");
 244                         close(fd);
 245                         return -1;
 246                 }
 247         }
 248
 249         close(fd);
 250         return 0;
 251 }
 252
 253
 254 static int br_getnumports(const char *br_name)
 255 {
 256         int fd;
 257         int i;
 258         int port_cnt = 0;
 259         unsigned long arg[4];
 260         int ifindices[MAX_BR_PORTS];
 261         struct ifreq ifr;
 262
 263         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 264                 perror("socket[AF_INET,SOCK_STREAM]");
 265                 return -1;
 266         }
 267
 268         arg[0] = BRCTL_GET_PORT_LIST;
 269         arg[1] = (unsigned long) ifindices;
 270         arg[2] = MAX_BR_PORTS;
 271         arg[3] = 0;
 272
 273         os_memset(ifindices, 0, sizeof(ifindices));
 274         os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name));
 275         ifr.ifr_data = (__caddr_t) arg;
 276
 277         if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) {
 278                 perror("ioctl[SIOCDEVPRIVATE,BRCTL_GET_PORT_LIST]");
 279                 close(fd);
 280                 return -1;
 281         }
 282
 283         for (i = 1; i < MAX_BR_PORTS; i++) {
 284                 if (ifindices[i] > 0) {
 285                         port_cnt++;
 286                 }
 287         }
 288
 289         close(fd);
 290         return port_cnt;
 291 }
 292
 293
 294 static int vlan_rem(const char *if_name)
 295 {
 296         int fd;
 297         struct vlan_ioctl_args if_request;
 298
 299         if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
 300                 fprintf(stderr, "Interface name to long.\n");
 301                 return -1;
 302         }
 303
 304         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 305                 perror("socket[AF_INET,SOCK_STREAM]");
 306                 return -1;
 307         }
 308
 309         os_memset(&if_request, 0, sizeof(if_request));
 310
 311         os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
 312         if_request.cmd = DEL_VLAN_CMD;
 313
 314         if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
 315                 perror("ioctl[SIOCSIFVLAN,DEL_VLAN_CMD]");
 316                 close(fd);
 317                 return -1;
 318         }
 319
 320         close(fd);
 321         return 0;
 322 }
 323
 324
 325 /*
 326         Add a vlan interface with VLAN ID 'vid' and tagged interface
 327         'if_name'.
 328
 329         returns -1 on error
 330         returns 1 if the interface already exists
 331         returns 0 otherwise
 332 */
 333 static int vlan_add(const char *if_name, int vid)
 334 {
 335         int fd;
 336         struct vlan_ioctl_args if_request;
 337
 338         ifconfig_up(if_name);
 339
 340         if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) {
 341                 fprintf(stderr, "Interface name to long.\n");
 342                 return -1;
 343         }
 344
 345         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 346                 perror("socket[AF_INET,SOCK_STREAM]");
 347                 return -1;
 348         }
 349
 350         os_memset(&if_request, 0, sizeof(if_request));
 351
 352         /* Determine if a suitable vlan device already exists. */
 353
 354         os_snprintf(if_request.device1, sizeof(if_request.device1), "vlan%d",
 355                     vid);
 356
 357         if_request.cmd = _GET_VLAN_VID_CMD;
 358
 359         if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0) {
 360
 361                 if (if_request.u.VID == vid) {
 362                         if_request.cmd = _GET_VLAN_REALDEV_NAME_CMD;
 363
 364                         if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 &&
 365                             os_strncmp(if_request.u.device2, if_name,
 366                                        sizeof(if_request.u.device2)) == 0) {
 367                                 close(fd);
 368                                 return 1;
 369                         }
 370                 }
 371         }
 372
 373         /* A suitable vlan device does not already exist, add one. */
 374
 375         os_memset(&if_request, 0, sizeof(if_request));
 376         os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1));
 377         if_request.u.VID = vid;
 378         if_request.cmd = ADD_VLAN_CMD;
 379
 380         if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
 381                 perror("ioctl[SIOCSIFVLAN,ADD_VLAN_CMD]");
 382                 close(fd);
 383                 return -1;
 384         }
 385
 386         close(fd);
 387         return 0;
 388 }
 389
 390
 391 static int vlan_set_name_type(unsigned int name_type)
 392 {
 393         int fd;
 394         struct vlan_ioctl_args if_request;
 395
 396         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 397                 perror("socket[AF_INET,SOCK_STREAM]");
 398                 return -1;
 399         }
 400
 401         os_memset(&if_request, 0, sizeof(if_request));
 402
 403         if_request.u.name_type = name_type;
 404         if_request.cmd = SET_VLAN_NAME_TYPE_CMD;
 405         if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) {
 406                 perror("ioctl[SIOCSIFVLAN,SET_VLAN_NAME_TYPE_CMD]");
 407                 close(fd);
 408                 return -1;
 409         }
 410
 411         close(fd);
 412         return 0;
 413 }
 414
 415
 416 static void vlan_newlink(char *ifname, struct hostapd_data *hapd)
 417 {
 418         char vlan_ifname[IFNAMSIZ];
 419         char br_name[IFNAMSIZ];
 420         struct hostapd_vlan *vlan = hapd->conf->vlan;
 421         char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface;
 422
 423         while (vlan) {
 424                 if (os_strcmp(ifname, vlan->ifname) == 0) {
 425
 426                         os_snprintf(br_name, sizeof(br_name), "brvlan%d",
 427                                     vlan->vlan_id);
 428
 429                         if (!br_addbr(br_name))
 430                                 vlan->clean |= DVLAN_CLEAN_BR;
 431
 432                         ifconfig_up(br_name);
 433
 434                         if (tagged_interface) {
 435
 436                                 if (!vlan_add(tagged_interface, vlan->vlan_id))
 437                                         vlan->clean |= DVLAN_CLEAN_VLAN;
 438
 439                                 os_snprintf(vlan_ifname, sizeof(vlan_ifname),
 440                                             "vlan%d", vlan->vlan_id);
 441
 442                                 if (!br_addif(br_name, vlan_ifname))
 443                                         vlan->clean |= DVLAN_CLEAN_VLAN_PORT;
 444
 445                                 ifconfig_up(vlan_ifname);
 446                         }
 447
 448                         if (!br_addif(br_name, ifname))
 449                                 vlan->clean |= DVLAN_CLEAN_WLAN_PORT;
 450
 451                         ifconfig_up(ifname);
 452
 453                         break;
 454                 }
 455                 vlan = vlan->next;
 456         }
 457 }
 458
 459
 460 static void vlan_dellink(char *ifname, struct hostapd_data *hapd)
 461 {
 462         char vlan_ifname[IFNAMSIZ];
 463         char br_name[IFNAMSIZ];
 464         struct hostapd_vlan *first, *prev, *vlan = hapd->conf->vlan;
 465         char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface;
 466         int numports;
 467
 468         first = prev = vlan;
 469
 470         while (vlan) {
 471                 if (os_strcmp(ifname, vlan->ifname) == 0) {
 472                         os_snprintf(br_name, sizeof(br_name), "brvlan%d",
 473                                     vlan->vlan_id);
 474
 475                         if (tagged_interface) {
 476                                 os_snprintf(vlan_ifname, sizeof(vlan_ifname),
 477                                             "vlan%d", vlan->vlan_id);
 478
 479                                 numports = br_getnumports(br_name);
 480                                 if (numports == 1) {
 481                                         br_delif(br_name, vlan_ifname);
 482
 483                                         vlan_rem(vlan_ifname);
 484
 485                                         ifconfig_down(br_name);
 486                                         br_delbr(br_name);
 487                                 }
 488                         }
 489
 490                         if (vlan == first) {
 491                                 hapd->conf->vlan = vlan->next;
 492                         } else {
 493                                 prev->next = vlan->next;
 494                         }
 495                         os_free(vlan);
 496
 497                         break;
 498                 }
 499                 prev = vlan;
 500                 vlan = vlan->next;
 501         }
 502 }
 503
 504
 505 static void
 506 vlan_read_ifnames(struct nlmsghdr *h, size_t len, int del,
 507                   struct hostapd_data *hapd)
 508 {
 509         struct ifinfomsg *ifi;
 510         int attrlen, nlmsg_len, rta_len;
 511         struct rtattr *attr;
 512
 513         if (len < sizeof(*ifi))
 514                 return;
 515
 516         ifi = NLMSG_DATA(h);
 517
 518         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 519
 520         attrlen = h->nlmsg_len - nlmsg_len;
 521         if (attrlen < 0)
 522                 return;
 523
 524         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
 525
 526         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 527         while (RTA_OK(attr, attrlen)) {
 528                 char ifname[IFNAMSIZ + 1];
 529
 530                 if (attr->rta_type == IFLA_IFNAME) {
 531                         int n = attr->rta_len - rta_len;
 532                         if (n < 0)
 533                                 break;
 534
 535                         os_memset(ifname, 0, sizeof(ifname));
 536
 537                         if ((size_t) n > sizeof(ifname))
 538                                 n = sizeof(ifname);
 539                         os_memcpy(ifname, ((char *) attr) + rta_len, n);
 540
 541                         if (del)
 542                                 vlan_dellink(ifname, hapd);
 543                         else
 544                                 vlan_newlink(ifname, hapd);
 545                 }
 546
 547                 attr = RTA_NEXT(attr, attrlen);
 548         }
 549 }
 550
 551
 552 static void vlan_event_receive(int sock, void *eloop_ctx, void *sock_ctx)
 553 {
 554         char buf[8192];
 555         int left;
 556         struct sockaddr_nl from;
 557         socklen_t fromlen;
 558         struct nlmsghdr *h;
 559         struct hostapd_data *hapd = eloop_ctx;
 560
 561         fromlen = sizeof(from);
 562         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 563                         (struct sockaddr *) &from, &fromlen);
 564         if (left < 0) {
 565                 if (errno != EINTR && errno != EAGAIN)
 566                         perror("recvfrom(netlink)");
 567                 return;
 568         }
 569
 570         h = (struct nlmsghdr *) buf;
 571         while (left >= (int) sizeof(*h)) {
 572                 int len, plen;
 573
 574                 len = h->nlmsg_len;
 575                 plen = len - sizeof(*h);
 576                 if (len > left || plen < 0) {
 577                         printf("Malformed netlink message: "
 578                                "len=%d left=%d plen=%d", len, left, plen);
 579                         break;
 580                 }
 581
 582                 switch (h->nlmsg_type) {
 583                 case RTM_NEWLINK:
 584                         vlan_read_ifnames(h, plen, 0, hapd);
 585                         break;
 586                 case RTM_DELLINK:
 587                         vlan_read_ifnames(h, plen, 1, hapd);
 588                         break;
 589                 }
 590
 591                 len = NLMSG_ALIGN(len);
 592                 left -= len;
 593                 h = (struct nlmsghdr *) ((char *) h + len);
 594         }
 595
 596         if (left > 0) {
 597                 printf("%d extra bytes in the end of netlink message",
 598                        left);
 599         }
 600 }
 601
 602
 603 static struct full_dynamic_vlan *
 604 full_dynamic_vlan_init(struct hostapd_data *hapd)
 605 {
 606         struct sockaddr_nl local;
 607         struct full_dynamic_vlan *priv;
 608
 609         priv = os_zalloc(sizeof(*priv));
 610         if (priv == NULL)
 611                 return NULL;
 612
 613         vlan_set_name_type(VLAN_NAME_TYPE_PLUS_VID_NO_PAD);
 614
 615         priv->s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 616         if (priv->s < 0) {
 617                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
 618                 os_free(priv);
 619                 return NULL;
 620         }
 621
 622         os_memset(&local, 0, sizeof(local));
 623         local.nl_family = AF_NETLINK;
 624         local.nl_groups = RTMGRP_LINK;
 625         if (bind(priv->s, (struct sockaddr *) &local, sizeof(local)) < 0) {
 626                 perror("bind(netlink)");
 627                 close(priv->s);
 628                 os_free(priv);
 629                 return NULL;
 630         }
 631
 632         if (eloop_register_read_sock(priv->s, vlan_event_receive, hapd, NULL))
 633         {
 634                 close(priv->s);
 635                 os_free(priv);
 636                 return NULL;
 637         }
 638
 639         return priv;
 640 }
 641
 642
 643 static void full_dynamic_vlan_deinit(struct full_dynamic_vlan *priv)
 644 {
 645         if (priv == NULL)
 646                 return;
 647         eloop_unregister_read_sock(priv->s);
 648         close(priv->s);
 649         os_free(priv);
 650 }
 651 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 652
 653
 654 int vlan_setup_encryption_dyn(struct hostapd_data *hapd,
 655                               struct hostapd_ssid *mssid, const char *dyn_vlan)
 656 {
 657         int i;
 658
 659         if (dyn_vlan == NULL)
 660                 return 0;
 661
 662         /* Static WEP keys are set here; IEEE 802.1X and WPA uses their own
 663          * functions for setting up dynamic broadcast keys. */
 664         for (i = 0; i < 4; i++) {
 665                 if (mssid->wep.key[i] &&
 666                     hapd->drv.set_key(dyn_vlan, hapd, WPA_ALG_WEP, NULL, i,
 667                                       i == mssid->wep.idx, NULL, 0,
 668                                       mssid->wep.key[i], mssid->wep.len[i])) {
 669                         printf("VLAN: Could not set WEP encryption for "
 670                                "dynamic VLAN.\n");
 671                         return -1;
 672                 }
 673         }
 674
 675         return 0;
 676 }
 677
 678
 679 static int vlan_dynamic_add(struct hostapd_data *hapd,
 680                             struct hostapd_vlan *vlan)
 681 {
 682         while (vlan) {
 683                 if (vlan->vlan_id != VLAN_ID_WILDCARD &&
 684                     hapd->drv.vlan_if_add(hapd, vlan->ifname)) {
 685                         if (errno != EEXIST) {
 686                                 printf("Could not add VLAN iface: %s: %s\n",
 687                                        vlan->ifname, strerror(errno));
 688                                 return -1;
 689                         }
 690                 }
 691
 692                 vlan = vlan->next;
 693         }
 694
 695         return 0;
 696 }
 697
 698
 699 static void vlan_dynamic_remove(struct hostapd_data *hapd,
 700                                 struct hostapd_vlan *vlan)
 701 {
 702         struct hostapd_vlan *next;
 703
 704         while (vlan) {
 705                 next = vlan->next;
 706
 707                 if (vlan->vlan_id != VLAN_ID_WILDCARD &&
 708                     hapd->drv.vlan_if_remove(hapd, vlan->ifname)) {
 709                         printf("Could not remove VLAN iface: %s: %s\n",
 710                                vlan->ifname, strerror(errno));
 711                 }
 712 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 713                 if (vlan->clean)
 714                         vlan_dellink(vlan->ifname, hapd);
 715 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 716
 717                 vlan = next;
 718         }
 719 }
 720
 721
 722 int vlan_init(struct hostapd_data *hapd)
 723 {
 724         if (vlan_dynamic_add(hapd, hapd->conf->vlan))
 725                 return -1;
 726
 727 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 728         hapd->full_dynamic_vlan = full_dynamic_vlan_init(hapd);
 729 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 730
 731         return 0;
 732 }
 733
 734
 735 void vlan_deinit(struct hostapd_data *hapd)
 736 {
 737         vlan_dynamic_remove(hapd, hapd->conf->vlan);
 738
 739 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 740         full_dynamic_vlan_deinit(hapd->full_dynamic_vlan);
 741 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 742 }
 743
 744
 745 struct hostapd_vlan * vlan_add_dynamic(struct hostapd_data *hapd,
 746                                        struct hostapd_vlan *vlan,
 747                                        int vlan_id)
 748 {
 749         struct hostapd_vlan *n;
 750         char *ifname, *pos;
 751
 752         if (vlan == NULL || vlan_id <= 0 || vlan_id > MAX_VLAN_ID ||
 753             vlan->vlan_id != VLAN_ID_WILDCARD)
 754                 return NULL;
 755
 756         ifname = os_strdup(vlan->ifname);
 757         if (ifname == NULL)
 758                 return NULL;
 759         pos = os_strchr(ifname, '#');
 760         if (pos == NULL) {
 761                 os_free(ifname);
 762                 return NULL;
 763         }
 764         *pos++ = '\0';
 765
 766         n = os_zalloc(sizeof(*n));
 767         if (n == NULL) {
 768                 os_free(ifname);
 769                 return NULL;
 770         }
 771
 772         n->vlan_id = vlan_id;
 773         n->dynamic_vlan = 1;
 774
 775         os_snprintf(n->ifname, sizeof(n->ifname), "%s%d%s", ifname, vlan_id,
 776                     pos);
 777         os_free(ifname);
 778
 779         if (hapd->drv.vlan_if_add(hapd, n->ifname)) {
 780                 os_free(n);
 781                 return NULL;
 782         }
 783
 784         n->next = hapd->conf->vlan;
 785         hapd->conf->vlan = n;
 786
 787         return n;
 788 }
 789
 790
 791 int vlan_remove_dynamic(struct hostapd_data *hapd, int vlan_id)
 792 {
 793         struct hostapd_vlan *vlan;
 794
 795         if (vlan_id <= 0 || vlan_id > MAX_VLAN_ID)
 796                 return 1;
 797
 798         vlan = hapd->conf->vlan;
 799         while (vlan) {
 800                 if (vlan->vlan_id == vlan_id && vlan->dynamic_vlan > 0) {
 801                         vlan->dynamic_vlan--;
 802                         break;
 803                 }
 804                 vlan = vlan->next;
 805         }
 806
 807         if (vlan == NULL)
 808                 return 1;
 809
 810         if (vlan->dynamic_vlan == 0)
 811                 hapd->drv.vlan_if_remove(hapd, vlan->ifname);
 812
 813         return 0;
 814 }