vlan_init.c revision 8d520ff1dc2da35cdca849e982051b86468016d8
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 "utils/includes.h" 18 19#include "utils/common.h" 20#include "hostapd.h" 21#include "ap_config.h" 22#include "ap_drv_ops.h" 23#include "vlan_init.h" 24 25 26#ifdef CONFIG_FULL_DYNAMIC_VLAN 27 28#include <net/if.h> 29#include <sys/ioctl.h> 30#include <linux/sockios.h> 31#include <linux/if_vlan.h> 32#include <linux/if_bridge.h> 33 34#include "drivers/priv_netlink.h" 35#include "utils/eloop.h" 36 37 38struct full_dynamic_vlan { 39 int s; /* socket on which to listen for new/removed interfaces. */ 40}; 41 42 43static int ifconfig_helper(const char *if_name, int up) 44{ 45 int fd; 46 struct ifreq ifr; 47 48 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 49 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 50 "failed: %s", __func__, strerror(errno)); 51 return -1; 52 } 53 54 os_memset(&ifr, 0, sizeof(ifr)); 55 os_strlcpy(ifr.ifr_name, if_name, IFNAMSIZ); 56 57 if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) { 58 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCGIFFLAGS) failed " 59 "for interface %s: %s", 60 __func__, if_name, strerror(errno)); 61 close(fd); 62 return -1; 63 } 64 65 if (up) 66 ifr.ifr_flags |= IFF_UP; 67 else 68 ifr.ifr_flags &= ~IFF_UP; 69 70 if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) { 71 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCSIFFLAGS) failed " 72 "for interface %s (up=%d): %s", 73 __func__, if_name, up, strerror(errno)); 74 close(fd); 75 return -1; 76 } 77 78 close(fd); 79 return 0; 80} 81 82 83static int ifconfig_up(const char *if_name) 84{ 85 wpa_printf(MSG_DEBUG, "VLAN: Set interface %s up", if_name); 86 return ifconfig_helper(if_name, 1); 87} 88 89 90static int ifconfig_down(const char *if_name) 91{ 92 wpa_printf(MSG_DEBUG, "VLAN: Set interface %s down", if_name); 93 return ifconfig_helper(if_name, 0); 94} 95 96 97/* 98 * These are only available in recent linux headers (without the leading 99 * underscore). 100 */ 101#define _GET_VLAN_REALDEV_NAME_CMD 8 102#define _GET_VLAN_VID_CMD 9 103 104/* This value should be 256 ONLY. If it is something else, then hostapd 105 * might crash!, as this value has been hard-coded in 2.4.x kernel 106 * bridging code. 107 */ 108#define MAX_BR_PORTS 256 109 110static int br_delif(const char *br_name, const char *if_name) 111{ 112 int fd; 113 struct ifreq ifr; 114 unsigned long args[2]; 115 int if_index; 116 117 wpa_printf(MSG_DEBUG, "VLAN: br_delif(%s, %s)", br_name, if_name); 118 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 119 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 120 "failed: %s", __func__, strerror(errno)); 121 return -1; 122 } 123 124 if_index = if_nametoindex(if_name); 125 126 if (if_index == 0) { 127 wpa_printf(MSG_ERROR, "VLAN: %s: Failure determining " 128 "interface index for '%s'", 129 __func__, if_name); 130 close(fd); 131 return -1; 132 } 133 134 args[0] = BRCTL_DEL_IF; 135 args[1] = if_index; 136 137 os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name)); 138 ifr.ifr_data = (__caddr_t) args; 139 140 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0 && errno != EINVAL) { 141 /* No error if interface already removed. */ 142 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl[SIOCDEVPRIVATE," 143 "BRCTL_DEL_IF] failed for br_name=%s if_name=%s: " 144 "%s", __func__, br_name, if_name, strerror(errno)); 145 close(fd); 146 return -1; 147 } 148 149 close(fd); 150 return 0; 151} 152 153 154/* 155 Add interface 'if_name' to the bridge 'br_name' 156 157 returns -1 on error 158 returns 1 if the interface is already part of the bridge 159 returns 0 otherwise 160*/ 161static int br_addif(const char *br_name, const char *if_name) 162{ 163 int fd; 164 struct ifreq ifr; 165 unsigned long args[2]; 166 int if_index; 167 168 wpa_printf(MSG_DEBUG, "VLAN: br_addif(%s, %s)", br_name, if_name); 169 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 170 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 171 "failed: %s", __func__, strerror(errno)); 172 return -1; 173 } 174 175 if_index = if_nametoindex(if_name); 176 177 if (if_index == 0) { 178 wpa_printf(MSG_ERROR, "VLAN: %s: Failure determining " 179 "interface index for '%s'", 180 __func__, if_name); 181 close(fd); 182 return -1; 183 } 184 185 args[0] = BRCTL_ADD_IF; 186 args[1] = if_index; 187 188 os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name)); 189 ifr.ifr_data = (__caddr_t) args; 190 191 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) { 192 if (errno == EBUSY) { 193 /* The interface is already added. */ 194 close(fd); 195 return 1; 196 } 197 198 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl[SIOCDEVPRIVATE," 199 "BRCTL_ADD_IF] failed for br_name=%s if_name=%s: " 200 "%s", __func__, br_name, if_name, strerror(errno)); 201 close(fd); 202 return -1; 203 } 204 205 close(fd); 206 return 0; 207} 208 209 210static int br_delbr(const char *br_name) 211{ 212 int fd; 213 unsigned long arg[2]; 214 215 wpa_printf(MSG_DEBUG, "VLAN: br_delbr(%s)", br_name); 216 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 217 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 218 "failed: %s", __func__, strerror(errno)); 219 return -1; 220 } 221 222 arg[0] = BRCTL_DEL_BRIDGE; 223 arg[1] = (unsigned long) br_name; 224 225 if (ioctl(fd, SIOCGIFBR, arg) < 0 && errno != ENXIO) { 226 /* No error if bridge already removed. */ 227 wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_DEL_BRIDGE failed for " 228 "%s: %s", __func__, br_name, strerror(errno)); 229 close(fd); 230 return -1; 231 } 232 233 close(fd); 234 return 0; 235} 236 237 238/* 239 Add a bridge with the name 'br_name'. 240 241 returns -1 on error 242 returns 1 if the bridge already exists 243 returns 0 otherwise 244*/ 245static int br_addbr(const char *br_name) 246{ 247 int fd; 248 unsigned long arg[4]; 249 struct ifreq ifr; 250 251 wpa_printf(MSG_DEBUG, "VLAN: br_addbr(%s)", br_name); 252 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 253 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 254 "failed: %s", __func__, strerror(errno)); 255 return -1; 256 } 257 258 arg[0] = BRCTL_ADD_BRIDGE; 259 arg[1] = (unsigned long) br_name; 260 261 if (ioctl(fd, SIOCGIFBR, arg) < 0) { 262 if (errno == EEXIST) { 263 /* The bridge is already added. */ 264 close(fd); 265 return 1; 266 } else { 267 wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_ADD_BRIDGE " 268 "failed for %s: %s", 269 __func__, br_name, strerror(errno)); 270 close(fd); 271 return -1; 272 } 273 } 274 275 /* Decrease forwarding delay to avoid EAPOL timeouts. */ 276 os_memset(&ifr, 0, sizeof(ifr)); 277 os_strlcpy(ifr.ifr_name, br_name, IFNAMSIZ); 278 arg[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY; 279 arg[1] = 1; 280 arg[2] = 0; 281 arg[3] = 0; 282 ifr.ifr_data = (char *) &arg; 283 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) { 284 wpa_printf(MSG_ERROR, "VLAN: %s: " 285 "BRCTL_SET_BRIDGE_FORWARD_DELAY (1 sec) failed for " 286 "%s: %s", __func__, br_name, strerror(errno)); 287 /* Continue anyway */ 288 } 289 290 close(fd); 291 return 0; 292} 293 294 295static int br_getnumports(const char *br_name) 296{ 297 int fd; 298 int i; 299 int port_cnt = 0; 300 unsigned long arg[4]; 301 int ifindices[MAX_BR_PORTS]; 302 struct ifreq ifr; 303 304 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 305 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 306 "failed: %s", __func__, strerror(errno)); 307 return -1; 308 } 309 310 arg[0] = BRCTL_GET_PORT_LIST; 311 arg[1] = (unsigned long) ifindices; 312 arg[2] = MAX_BR_PORTS; 313 arg[3] = 0; 314 315 os_memset(ifindices, 0, sizeof(ifindices)); 316 os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name)); 317 ifr.ifr_data = (__caddr_t) arg; 318 319 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) { 320 wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_GET_PORT_LIST " 321 "failed for %s: %s", 322 __func__, br_name, strerror(errno)); 323 close(fd); 324 return -1; 325 } 326 327 for (i = 1; i < MAX_BR_PORTS; i++) { 328 if (ifindices[i] > 0) { 329 port_cnt++; 330 } 331 } 332 333 close(fd); 334 return port_cnt; 335} 336 337 338static int vlan_rem(const char *if_name) 339{ 340 int fd; 341 struct vlan_ioctl_args if_request; 342 343 wpa_printf(MSG_DEBUG, "VLAN: vlan_rem(%s)", if_name); 344 if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) { 345 wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'", 346 if_name); 347 return -1; 348 } 349 350 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 351 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 352 "failed: %s", __func__, strerror(errno)); 353 return -1; 354 } 355 356 os_memset(&if_request, 0, sizeof(if_request)); 357 358 os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1)); 359 if_request.cmd = DEL_VLAN_CMD; 360 361 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) { 362 wpa_printf(MSG_ERROR, "VLAN: %s: DEL_VLAN_CMD failed for %s: " 363 "%s", __func__, if_name, strerror(errno)); 364 close(fd); 365 return -1; 366 } 367 368 close(fd); 369 return 0; 370} 371 372 373/* 374 Add a vlan interface with VLAN ID 'vid' and tagged interface 375 'if_name'. 376 377 returns -1 on error 378 returns 1 if the interface already exists 379 returns 0 otherwise 380*/ 381static int vlan_add(const char *if_name, int vid) 382{ 383 int fd; 384 struct vlan_ioctl_args if_request; 385 386 wpa_printf(MSG_DEBUG, "VLAN: vlan_add(if_name=%s, vid=%d)", 387 if_name, vid); 388 ifconfig_up(if_name); 389 390 if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) { 391 wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'", 392 if_name); 393 return -1; 394 } 395 396 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 397 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 398 "failed: %s", __func__, strerror(errno)); 399 return -1; 400 } 401 402 os_memset(&if_request, 0, sizeof(if_request)); 403 404 /* Determine if a suitable vlan device already exists. */ 405 406 os_snprintf(if_request.device1, sizeof(if_request.device1), "vlan%d", 407 vid); 408 409 if_request.cmd = _GET_VLAN_VID_CMD; 410 411 if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0) { 412 413 if (if_request.u.VID == vid) { 414 if_request.cmd = _GET_VLAN_REALDEV_NAME_CMD; 415 416 if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 && 417 os_strncmp(if_request.u.device2, if_name, 418 sizeof(if_request.u.device2)) == 0) { 419 close(fd); 420 wpa_printf(MSG_DEBUG, "VLAN: vlan_add: " 421 "if_name %s exists already", 422 if_request.device1); 423 return 1; 424 } 425 } 426 } 427 428 /* A suitable vlan device does not already exist, add one. */ 429 430 os_memset(&if_request, 0, sizeof(if_request)); 431 os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1)); 432 if_request.u.VID = vid; 433 if_request.cmd = ADD_VLAN_CMD; 434 435 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) { 436 wpa_printf(MSG_ERROR, "VLAN: %s: ADD_VLAN_CMD failed for %s: " 437 "%s", 438 __func__, if_request.device1, strerror(errno)); 439 close(fd); 440 return -1; 441 } 442 443 close(fd); 444 return 0; 445} 446 447 448static int vlan_set_name_type(unsigned int name_type) 449{ 450 int fd; 451 struct vlan_ioctl_args if_request; 452 453 wpa_printf(MSG_DEBUG, "VLAN: vlan_set_name_type(name_type=%u)", 454 name_type); 455 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 456 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 457 "failed: %s", __func__, strerror(errno)); 458 return -1; 459 } 460 461 os_memset(&if_request, 0, sizeof(if_request)); 462 463 if_request.u.name_type = name_type; 464 if_request.cmd = SET_VLAN_NAME_TYPE_CMD; 465 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) { 466 wpa_printf(MSG_ERROR, "VLAN: %s: SET_VLAN_NAME_TYPE_CMD " 467 "name_type=%u failed: %s", 468 __func__, name_type, strerror(errno)); 469 close(fd); 470 return -1; 471 } 472 473 close(fd); 474 return 0; 475} 476 477 478static void vlan_newlink(char *ifname, struct hostapd_data *hapd) 479{ 480 char vlan_ifname[IFNAMSIZ]; 481 char br_name[IFNAMSIZ]; 482 struct hostapd_vlan *vlan = hapd->conf->vlan; 483 char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface; 484 485 wpa_printf(MSG_DEBUG, "VLAN: vlan_newlink(%s)", ifname); 486 487 while (vlan) { 488 if (os_strcmp(ifname, vlan->ifname) == 0) { 489 490 os_snprintf(br_name, sizeof(br_name), "brvlan%d", 491 vlan->vlan_id); 492 493 if (!br_addbr(br_name)) 494 vlan->clean |= DVLAN_CLEAN_BR; 495 496 ifconfig_up(br_name); 497 498 if (tagged_interface) { 499 500 if (!vlan_add(tagged_interface, vlan->vlan_id)) 501 vlan->clean |= DVLAN_CLEAN_VLAN; 502 503 os_snprintf(vlan_ifname, sizeof(vlan_ifname), 504 "vlan%d", vlan->vlan_id); 505 506 if (!br_addif(br_name, vlan_ifname)) 507 vlan->clean |= DVLAN_CLEAN_VLAN_PORT; 508 509 ifconfig_up(vlan_ifname); 510 } 511 512 if (!br_addif(br_name, ifname)) 513 vlan->clean |= DVLAN_CLEAN_WLAN_PORT; 514 515 ifconfig_up(ifname); 516 517 break; 518 } 519 vlan = vlan->next; 520 } 521} 522 523 524static void vlan_dellink(char *ifname, struct hostapd_data *hapd) 525{ 526 char vlan_ifname[IFNAMSIZ]; 527 char br_name[IFNAMSIZ]; 528 struct hostapd_vlan *first, *prev, *vlan = hapd->conf->vlan; 529 char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface; 530 531 wpa_printf(MSG_DEBUG, "VLAN: vlan_dellink(%s)", ifname); 532 533 first = prev = vlan; 534 535 while (vlan) { 536 if (os_strcmp(ifname, vlan->ifname) == 0) { 537 os_snprintf(br_name, sizeof(br_name), "brvlan%d", 538 vlan->vlan_id); 539 540 if (vlan->clean & DVLAN_CLEAN_WLAN_PORT) 541 br_delif(br_name, vlan->ifname); 542 543 if (tagged_interface) { 544 os_snprintf(vlan_ifname, sizeof(vlan_ifname), 545 "vlan%d", vlan->vlan_id); 546 if (vlan->clean & DVLAN_CLEAN_VLAN_PORT) 547 br_delif(br_name, vlan_ifname); 548 ifconfig_down(vlan_ifname); 549 550 if (vlan->clean & DVLAN_CLEAN_VLAN) 551 vlan_rem(vlan_ifname); 552 } 553 554 if ((vlan->clean & DVLAN_CLEAN_BR) && 555 br_getnumports(br_name) == 0) { 556 ifconfig_down(br_name); 557 br_delbr(br_name); 558 } 559 560 if (vlan == first) { 561 hapd->conf->vlan = vlan->next; 562 } else { 563 prev->next = vlan->next; 564 } 565 os_free(vlan); 566 567 break; 568 } 569 prev = vlan; 570 vlan = vlan->next; 571 } 572} 573 574 575static void 576vlan_read_ifnames(struct nlmsghdr *h, size_t len, int del, 577 struct hostapd_data *hapd) 578{ 579 struct ifinfomsg *ifi; 580 int attrlen, nlmsg_len, rta_len; 581 struct rtattr *attr; 582 583 if (len < sizeof(*ifi)) 584 return; 585 586 ifi = NLMSG_DATA(h); 587 588 nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg)); 589 590 attrlen = h->nlmsg_len - nlmsg_len; 591 if (attrlen < 0) 592 return; 593 594 attr = (struct rtattr *) (((char *) ifi) + nlmsg_len); 595 596 rta_len = RTA_ALIGN(sizeof(struct rtattr)); 597 while (RTA_OK(attr, attrlen)) { 598 char ifname[IFNAMSIZ + 1]; 599 600 if (attr->rta_type == IFLA_IFNAME) { 601 int n = attr->rta_len - rta_len; 602 if (n < 0) 603 break; 604 605 os_memset(ifname, 0, sizeof(ifname)); 606 607 if ((size_t) n > sizeof(ifname)) 608 n = sizeof(ifname); 609 os_memcpy(ifname, ((char *) attr) + rta_len, n); 610 611 if (del) 612 vlan_dellink(ifname, hapd); 613 else 614 vlan_newlink(ifname, hapd); 615 } 616 617 attr = RTA_NEXT(attr, attrlen); 618 } 619} 620 621 622static void vlan_event_receive(int sock, void *eloop_ctx, void *sock_ctx) 623{ 624 char buf[8192]; 625 int left; 626 struct sockaddr_nl from; 627 socklen_t fromlen; 628 struct nlmsghdr *h; 629 struct hostapd_data *hapd = eloop_ctx; 630 631 fromlen = sizeof(from); 632 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT, 633 (struct sockaddr *) &from, &fromlen); 634 if (left < 0) { 635 if (errno != EINTR && errno != EAGAIN) 636 wpa_printf(MSG_ERROR, "VLAN: %s: recvfrom failed: %s", 637 __func__, strerror(errno)); 638 return; 639 } 640 641 h = (struct nlmsghdr *) buf; 642 while (left >= (int) sizeof(*h)) { 643 int len, plen; 644 645 len = h->nlmsg_len; 646 plen = len - sizeof(*h); 647 if (len > left || plen < 0) { 648 wpa_printf(MSG_DEBUG, "VLAN: Malformed netlink " 649 "message: len=%d left=%d plen=%d", 650 len, left, plen); 651 break; 652 } 653 654 switch (h->nlmsg_type) { 655 case RTM_NEWLINK: 656 vlan_read_ifnames(h, plen, 0, hapd); 657 break; 658 case RTM_DELLINK: 659 vlan_read_ifnames(h, plen, 1, hapd); 660 break; 661 } 662 663 len = NLMSG_ALIGN(len); 664 left -= len; 665 h = (struct nlmsghdr *) ((char *) h + len); 666 } 667 668 if (left > 0) { 669 wpa_printf(MSG_DEBUG, "VLAN: %s: %d extra bytes in the end of " 670 "netlink message", __func__, left); 671 } 672} 673 674 675static struct full_dynamic_vlan * 676full_dynamic_vlan_init(struct hostapd_data *hapd) 677{ 678 struct sockaddr_nl local; 679 struct full_dynamic_vlan *priv; 680 681 priv = os_zalloc(sizeof(*priv)); 682 if (priv == NULL) 683 return NULL; 684 685 vlan_set_name_type(VLAN_NAME_TYPE_PLUS_VID_NO_PAD); 686 687 priv->s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 688 if (priv->s < 0) { 689 wpa_printf(MSG_ERROR, "VLAN: %s: socket(PF_NETLINK,SOCK_RAW," 690 "NETLINK_ROUTE) failed: %s", 691 __func__, strerror(errno)); 692 os_free(priv); 693 return NULL; 694 } 695 696 os_memset(&local, 0, sizeof(local)); 697 local.nl_family = AF_NETLINK; 698 local.nl_groups = RTMGRP_LINK; 699 if (bind(priv->s, (struct sockaddr *) &local, sizeof(local)) < 0) { 700 wpa_printf(MSG_ERROR, "VLAN: %s: bind(netlink) failed: %s", 701 __func__, strerror(errno)); 702 close(priv->s); 703 os_free(priv); 704 return NULL; 705 } 706 707 if (eloop_register_read_sock(priv->s, vlan_event_receive, hapd, NULL)) 708 { 709 close(priv->s); 710 os_free(priv); 711 return NULL; 712 } 713 714 return priv; 715} 716 717 718static void full_dynamic_vlan_deinit(struct full_dynamic_vlan *priv) 719{ 720 if (priv == NULL) 721 return; 722 eloop_unregister_read_sock(priv->s); 723 close(priv->s); 724 os_free(priv); 725} 726#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 727 728 729int vlan_setup_encryption_dyn(struct hostapd_data *hapd, 730 struct hostapd_ssid *mssid, const char *dyn_vlan) 731{ 732 int i; 733 734 if (dyn_vlan == NULL) 735 return 0; 736 737 /* Static WEP keys are set here; IEEE 802.1X and WPA uses their own 738 * functions for setting up dynamic broadcast keys. */ 739 for (i = 0; i < 4; i++) { 740 if (mssid->wep.key[i] && 741 hostapd_drv_set_key(dyn_vlan, hapd, WPA_ALG_WEP, NULL, i, 742 i == mssid->wep.idx, NULL, 0, 743 mssid->wep.key[i], mssid->wep.len[i])) 744 { 745 wpa_printf(MSG_ERROR, "VLAN: Could not set WEP " 746 "encryption for dynamic VLAN"); 747 return -1; 748 } 749 } 750 751 return 0; 752} 753 754 755static int vlan_dynamic_add(struct hostapd_data *hapd, 756 struct hostapd_vlan *vlan) 757{ 758 while (vlan) { 759 if (vlan->vlan_id != VLAN_ID_WILDCARD) { 760 if (hostapd_vlan_if_add(hapd, vlan->ifname)) { 761 if (errno != EEXIST) { 762 wpa_printf(MSG_ERROR, "VLAN: Could " 763 "not add VLAN %s: %s", 764 vlan->ifname, 765 strerror(errno)); 766 return -1; 767 } 768 } 769#ifdef CONFIG_FULL_DYNAMIC_VLAN 770 ifconfig_up(vlan->ifname); 771#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 772 } 773 774 vlan = vlan->next; 775 } 776 777 return 0; 778} 779 780 781static void vlan_dynamic_remove(struct hostapd_data *hapd, 782 struct hostapd_vlan *vlan) 783{ 784 struct hostapd_vlan *next; 785 786 while (vlan) { 787 next = vlan->next; 788 789 if (vlan->vlan_id != VLAN_ID_WILDCARD && 790 hostapd_vlan_if_remove(hapd, vlan->ifname)) { 791 wpa_printf(MSG_ERROR, "VLAN: Could not remove VLAN " 792 "iface: %s: %s", 793 vlan->ifname, strerror(errno)); 794 } 795#ifdef CONFIG_FULL_DYNAMIC_VLAN 796 if (vlan->clean) 797 vlan_dellink(vlan->ifname, hapd); 798#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 799 800 vlan = next; 801 } 802} 803 804 805int vlan_init(struct hostapd_data *hapd) 806{ 807#ifdef CONFIG_FULL_DYNAMIC_VLAN 808 hapd->full_dynamic_vlan = full_dynamic_vlan_init(hapd); 809#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 810 811 if (vlan_dynamic_add(hapd, hapd->conf->vlan)) 812 return -1; 813 814 return 0; 815} 816 817 818void vlan_deinit(struct hostapd_data *hapd) 819{ 820 vlan_dynamic_remove(hapd, hapd->conf->vlan); 821 822#ifdef CONFIG_FULL_DYNAMIC_VLAN 823 full_dynamic_vlan_deinit(hapd->full_dynamic_vlan); 824#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 825} 826 827 828struct hostapd_vlan * vlan_add_dynamic(struct hostapd_data *hapd, 829 struct hostapd_vlan *vlan, 830 int vlan_id) 831{ 832 struct hostapd_vlan *n; 833 char *ifname, *pos; 834 835 if (vlan == NULL || vlan_id <= 0 || vlan_id > MAX_VLAN_ID || 836 vlan->vlan_id != VLAN_ID_WILDCARD) 837 return NULL; 838 839 wpa_printf(MSG_DEBUG, "VLAN: %s(vlan_id=%d ifname=%s)", 840 __func__, vlan_id, vlan->ifname); 841 ifname = os_strdup(vlan->ifname); 842 if (ifname == NULL) 843 return NULL; 844 pos = os_strchr(ifname, '#'); 845 if (pos == NULL) { 846 os_free(ifname); 847 return NULL; 848 } 849 *pos++ = '\0'; 850 851 n = os_zalloc(sizeof(*n)); 852 if (n == NULL) { 853 os_free(ifname); 854 return NULL; 855 } 856 857 n->vlan_id = vlan_id; 858 n->dynamic_vlan = 1; 859 860 os_snprintf(n->ifname, sizeof(n->ifname), "%s%d%s", ifname, vlan_id, 861 pos); 862 os_free(ifname); 863 864 if (hostapd_vlan_if_add(hapd, n->ifname)) { 865 os_free(n); 866 return NULL; 867 } 868 869 n->next = hapd->conf->vlan; 870 hapd->conf->vlan = n; 871 872#ifdef CONFIG_FULL_DYNAMIC_VLAN 873 ifconfig_up(n->ifname); 874#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 875 876 return n; 877} 878 879 880int vlan_remove_dynamic(struct hostapd_data *hapd, int vlan_id) 881{ 882 struct hostapd_vlan *vlan; 883 884 if (vlan_id <= 0 || vlan_id > MAX_VLAN_ID) 885 return 1; 886 887 wpa_printf(MSG_DEBUG, "VLAN: %s(vlan_id=%d)", __func__, vlan_id); 888 889 vlan = hapd->conf->vlan; 890 while (vlan) { 891 if (vlan->vlan_id == vlan_id && vlan->dynamic_vlan > 0) { 892 vlan->dynamic_vlan--; 893 break; 894 } 895 vlan = vlan->next; 896 } 897 898 if (vlan == NULL) 899 return 1; 900 901 if (vlan->dynamic_vlan == 0) 902 hostapd_vlan_if_remove(hapd, vlan->ifname); 903 904 return 0; 905} 906