vlan_init.c revision 4b06059785b935dd1f4f09314e4e12c417d2c6a4
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#include "vlan_util.h" 25 26 27#ifdef CONFIG_FULL_DYNAMIC_VLAN 28 29#include <net/if.h> 30#include <sys/ioctl.h> 31#include <linux/sockios.h> 32#include <linux/if_vlan.h> 33#include <linux/if_bridge.h> 34 35#include "drivers/priv_netlink.h" 36#include "utils/eloop.h" 37 38 39struct full_dynamic_vlan { 40 int s; /* socket on which to listen for new/removed interfaces. */ 41}; 42 43 44static int ifconfig_helper(const char *if_name, int up) 45{ 46 int fd; 47 struct ifreq ifr; 48 49 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 50 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 51 "failed: %s", __func__, strerror(errno)); 52 return -1; 53 } 54 55 os_memset(&ifr, 0, sizeof(ifr)); 56 os_strlcpy(ifr.ifr_name, if_name, IFNAMSIZ); 57 58 if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) { 59 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCGIFFLAGS) failed " 60 "for interface %s: %s", 61 __func__, if_name, strerror(errno)); 62 close(fd); 63 return -1; 64 } 65 66 if (up) 67 ifr.ifr_flags |= IFF_UP; 68 else 69 ifr.ifr_flags &= ~IFF_UP; 70 71 if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) { 72 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCSIFFLAGS) failed " 73 "for interface %s (up=%d): %s", 74 __func__, if_name, up, strerror(errno)); 75 close(fd); 76 return -1; 77 } 78 79 close(fd); 80 return 0; 81} 82 83 84static int ifconfig_up(const char *if_name) 85{ 86 wpa_printf(MSG_DEBUG, "VLAN: Set interface %s up", if_name); 87 return ifconfig_helper(if_name, 1); 88} 89 90 91static int ifconfig_down(const char *if_name) 92{ 93 wpa_printf(MSG_DEBUG, "VLAN: Set interface %s down", if_name); 94 return ifconfig_helper(if_name, 0); 95} 96 97 98/* 99 * These are only available in recent linux headers (without the leading 100 * underscore). 101 */ 102#define _GET_VLAN_REALDEV_NAME_CMD 8 103#define _GET_VLAN_VID_CMD 9 104 105/* This value should be 256 ONLY. If it is something else, then hostapd 106 * might crash!, as this value has been hard-coded in 2.4.x kernel 107 * bridging code. 108 */ 109#define MAX_BR_PORTS 256 110 111static int br_delif(const char *br_name, const char *if_name) 112{ 113 int fd; 114 struct ifreq ifr; 115 unsigned long args[2]; 116 int if_index; 117 118 wpa_printf(MSG_DEBUG, "VLAN: br_delif(%s, %s)", br_name, if_name); 119 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 120 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 121 "failed: %s", __func__, strerror(errno)); 122 return -1; 123 } 124 125 if_index = if_nametoindex(if_name); 126 127 if (if_index == 0) { 128 wpa_printf(MSG_ERROR, "VLAN: %s: Failure determining " 129 "interface index for '%s'", 130 __func__, if_name); 131 close(fd); 132 return -1; 133 } 134 135 args[0] = BRCTL_DEL_IF; 136 args[1] = if_index; 137 138 os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name)); 139 ifr.ifr_data = (__caddr_t) args; 140 141 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0 && errno != EINVAL) { 142 /* No error if interface already removed. */ 143 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl[SIOCDEVPRIVATE," 144 "BRCTL_DEL_IF] failed for br_name=%s if_name=%s: " 145 "%s", __func__, br_name, if_name, strerror(errno)); 146 close(fd); 147 return -1; 148 } 149 150 close(fd); 151 return 0; 152} 153 154 155/* 156 Add interface 'if_name' to the bridge 'br_name' 157 158 returns -1 on error 159 returns 1 if the interface is already part of the bridge 160 returns 0 otherwise 161*/ 162static int br_addif(const char *br_name, const char *if_name) 163{ 164 int fd; 165 struct ifreq ifr; 166 unsigned long args[2]; 167 int if_index; 168 169 wpa_printf(MSG_DEBUG, "VLAN: br_addif(%s, %s)", br_name, if_name); 170 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 171 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 172 "failed: %s", __func__, strerror(errno)); 173 return -1; 174 } 175 176 if_index = if_nametoindex(if_name); 177 178 if (if_index == 0) { 179 wpa_printf(MSG_ERROR, "VLAN: %s: Failure determining " 180 "interface index for '%s'", 181 __func__, if_name); 182 close(fd); 183 return -1; 184 } 185 186 args[0] = BRCTL_ADD_IF; 187 args[1] = if_index; 188 189 os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name)); 190 ifr.ifr_data = (__caddr_t) args; 191 192 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) { 193 if (errno == EBUSY) { 194 /* The interface is already added. */ 195 close(fd); 196 return 1; 197 } 198 199 wpa_printf(MSG_ERROR, "VLAN: %s: ioctl[SIOCDEVPRIVATE," 200 "BRCTL_ADD_IF] failed for br_name=%s if_name=%s: " 201 "%s", __func__, br_name, if_name, strerror(errno)); 202 close(fd); 203 return -1; 204 } 205 206 close(fd); 207 return 0; 208} 209 210 211static int br_delbr(const char *br_name) 212{ 213 int fd; 214 unsigned long arg[2]; 215 216 wpa_printf(MSG_DEBUG, "VLAN: br_delbr(%s)", br_name); 217 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 218 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 219 "failed: %s", __func__, strerror(errno)); 220 return -1; 221 } 222 223 arg[0] = BRCTL_DEL_BRIDGE; 224 arg[1] = (unsigned long) br_name; 225 226 if (ioctl(fd, SIOCGIFBR, arg) < 0 && errno != ENXIO) { 227 /* No error if bridge already removed. */ 228 wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_DEL_BRIDGE failed for " 229 "%s: %s", __func__, br_name, strerror(errno)); 230 close(fd); 231 return -1; 232 } 233 234 close(fd); 235 return 0; 236} 237 238 239/* 240 Add a bridge with the name 'br_name'. 241 242 returns -1 on error 243 returns 1 if the bridge already exists 244 returns 0 otherwise 245*/ 246static int br_addbr(const char *br_name) 247{ 248 int fd; 249 unsigned long arg[4]; 250 struct ifreq ifr; 251 252 wpa_printf(MSG_DEBUG, "VLAN: br_addbr(%s)", br_name); 253 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 254 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 255 "failed: %s", __func__, strerror(errno)); 256 return -1; 257 } 258 259 arg[0] = BRCTL_ADD_BRIDGE; 260 arg[1] = (unsigned long) br_name; 261 262 if (ioctl(fd, SIOCGIFBR, arg) < 0) { 263 if (errno == EEXIST) { 264 /* The bridge is already added. */ 265 close(fd); 266 return 1; 267 } else { 268 wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_ADD_BRIDGE " 269 "failed for %s: %s", 270 __func__, br_name, strerror(errno)); 271 close(fd); 272 return -1; 273 } 274 } 275 276 /* Decrease forwarding delay to avoid EAPOL timeouts. */ 277 os_memset(&ifr, 0, sizeof(ifr)); 278 os_strlcpy(ifr.ifr_name, br_name, IFNAMSIZ); 279 arg[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY; 280 arg[1] = 1; 281 arg[2] = 0; 282 arg[3] = 0; 283 ifr.ifr_data = (char *) &arg; 284 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) { 285 wpa_printf(MSG_ERROR, "VLAN: %s: " 286 "BRCTL_SET_BRIDGE_FORWARD_DELAY (1 sec) failed for " 287 "%s: %s", __func__, br_name, strerror(errno)); 288 /* Continue anyway */ 289 } 290 291 close(fd); 292 return 0; 293} 294 295 296static int br_getnumports(const char *br_name) 297{ 298 int fd; 299 int i; 300 int port_cnt = 0; 301 unsigned long arg[4]; 302 int ifindices[MAX_BR_PORTS]; 303 struct ifreq ifr; 304 305 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 306 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 307 "failed: %s", __func__, strerror(errno)); 308 return -1; 309 } 310 311 arg[0] = BRCTL_GET_PORT_LIST; 312 arg[1] = (unsigned long) ifindices; 313 arg[2] = MAX_BR_PORTS; 314 arg[3] = 0; 315 316 os_memset(ifindices, 0, sizeof(ifindices)); 317 os_strlcpy(ifr.ifr_name, br_name, sizeof(ifr.ifr_name)); 318 ifr.ifr_data = (__caddr_t) arg; 319 320 if (ioctl(fd, SIOCDEVPRIVATE, &ifr) < 0) { 321 wpa_printf(MSG_ERROR, "VLAN: %s: BRCTL_GET_PORT_LIST " 322 "failed for %s: %s", 323 __func__, br_name, strerror(errno)); 324 close(fd); 325 return -1; 326 } 327 328 for (i = 1; i < MAX_BR_PORTS; i++) { 329 if (ifindices[i] > 0) { 330 port_cnt++; 331 } 332 } 333 334 close(fd); 335 return port_cnt; 336} 337 338 339#ifndef CONFIG_VLAN_NETLINK 340 341int vlan_rem(const char *if_name) 342{ 343 int fd; 344 struct vlan_ioctl_args if_request; 345 346 wpa_printf(MSG_DEBUG, "VLAN: vlan_rem(%s)", if_name); 347 if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) { 348 wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'", 349 if_name); 350 return -1; 351 } 352 353 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 354 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 355 "failed: %s", __func__, strerror(errno)); 356 return -1; 357 } 358 359 os_memset(&if_request, 0, sizeof(if_request)); 360 361 os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1)); 362 if_request.cmd = DEL_VLAN_CMD; 363 364 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) { 365 wpa_printf(MSG_ERROR, "VLAN: %s: DEL_VLAN_CMD failed for %s: " 366 "%s", __func__, if_name, strerror(errno)); 367 close(fd); 368 return -1; 369 } 370 371 close(fd); 372 return 0; 373} 374 375 376/* 377 Add a vlan interface with VLAN ID 'vid' and tagged interface 378 'if_name'. 379 380 returns -1 on error 381 returns 1 if the interface already exists 382 returns 0 otherwise 383*/ 384int vlan_add(const char *if_name, int vid, const char *vlan_if_name) 385{ 386 int fd; 387 struct vlan_ioctl_args if_request; 388 389 wpa_printf(MSG_DEBUG, "VLAN: vlan_add(if_name=%s, vid=%d)", 390 if_name, vid); 391 ifconfig_up(if_name); 392 393 if ((os_strlen(if_name) + 1) > sizeof(if_request.device1)) { 394 wpa_printf(MSG_ERROR, "VLAN: Interface name too long: '%s'", 395 if_name); 396 return -1; 397 } 398 399 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 400 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 401 "failed: %s", __func__, strerror(errno)); 402 return -1; 403 } 404 405 os_memset(&if_request, 0, sizeof(if_request)); 406 407 /* Determine if a suitable vlan device already exists. */ 408 409 os_snprintf(if_request.device1, sizeof(if_request.device1), "vlan%d", 410 vid); 411 412 if_request.cmd = _GET_VLAN_VID_CMD; 413 414 if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0) { 415 416 if (if_request.u.VID == vid) { 417 if_request.cmd = _GET_VLAN_REALDEV_NAME_CMD; 418 419 if (ioctl(fd, SIOCSIFVLAN, &if_request) == 0 && 420 os_strncmp(if_request.u.device2, if_name, 421 sizeof(if_request.u.device2)) == 0) { 422 close(fd); 423 wpa_printf(MSG_DEBUG, "VLAN: vlan_add: " 424 "if_name %s exists already", 425 if_request.device1); 426 return 1; 427 } 428 } 429 } 430 431 /* A suitable vlan device does not already exist, add one. */ 432 433 os_memset(&if_request, 0, sizeof(if_request)); 434 os_strlcpy(if_request.device1, if_name, sizeof(if_request.device1)); 435 if_request.u.VID = vid; 436 if_request.cmd = ADD_VLAN_CMD; 437 438 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) { 439 wpa_printf(MSG_ERROR, "VLAN: %s: ADD_VLAN_CMD failed for %s: " 440 "%s", 441 __func__, if_request.device1, strerror(errno)); 442 close(fd); 443 return -1; 444 } 445 446 close(fd); 447 return 0; 448} 449 450 451static int vlan_set_name_type(unsigned int name_type) 452{ 453 int fd; 454 struct vlan_ioctl_args if_request; 455 456 wpa_printf(MSG_DEBUG, "VLAN: vlan_set_name_type(name_type=%u)", 457 name_type); 458 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 459 wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) " 460 "failed: %s", __func__, strerror(errno)); 461 return -1; 462 } 463 464 os_memset(&if_request, 0, sizeof(if_request)); 465 466 if_request.u.name_type = name_type; 467 if_request.cmd = SET_VLAN_NAME_TYPE_CMD; 468 if (ioctl(fd, SIOCSIFVLAN, &if_request) < 0) { 469 wpa_printf(MSG_ERROR, "VLAN: %s: SET_VLAN_NAME_TYPE_CMD " 470 "name_type=%u failed: %s", 471 __func__, name_type, strerror(errno)); 472 close(fd); 473 return -1; 474 } 475 476 close(fd); 477 return 0; 478} 479 480#endif /* CONFIG_VLAN_NETLINK */ 481 482 483static void vlan_newlink(char *ifname, struct hostapd_data *hapd) 484{ 485 char vlan_ifname[IFNAMSIZ]; 486 char br_name[IFNAMSIZ]; 487 struct hostapd_vlan *vlan = hapd->conf->vlan; 488 char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface; 489 int vlan_naming = hapd->conf->ssid.vlan_naming; 490 491 wpa_printf(MSG_DEBUG, "VLAN: vlan_newlink(%s)", ifname); 492 493 while (vlan) { 494 if (os_strcmp(ifname, vlan->ifname) == 0) { 495 496 os_snprintf(br_name, sizeof(br_name), "brvlan%d", 497 vlan->vlan_id); 498 499 if (!br_addbr(br_name)) 500 vlan->clean |= DVLAN_CLEAN_BR; 501 502 ifconfig_up(br_name); 503 504 if (tagged_interface) { 505 if (vlan_naming == 506 DYNAMIC_VLAN_NAMING_WITH_DEVICE) 507 os_snprintf(vlan_ifname, 508 sizeof(vlan_ifname), 509 "%s.%d", tagged_interface, 510 vlan->vlan_id); 511 else 512 os_snprintf(vlan_ifname, 513 sizeof(vlan_ifname), 514 "vlan%d", vlan->vlan_id); 515 516 ifconfig_up(tagged_interface); 517 if (!vlan_add(tagged_interface, vlan->vlan_id, 518 vlan_ifname)) 519 vlan->clean |= DVLAN_CLEAN_VLAN; 520 521 if (!br_addif(br_name, vlan_ifname)) 522 vlan->clean |= DVLAN_CLEAN_VLAN_PORT; 523 524 ifconfig_up(vlan_ifname); 525 } 526 527 if (!br_addif(br_name, ifname)) 528 vlan->clean |= DVLAN_CLEAN_WLAN_PORT; 529 530 ifconfig_up(ifname); 531 532 break; 533 } 534 vlan = vlan->next; 535 } 536} 537 538 539static void vlan_dellink(char *ifname, struct hostapd_data *hapd) 540{ 541 char vlan_ifname[IFNAMSIZ]; 542 char br_name[IFNAMSIZ]; 543 struct hostapd_vlan *first, *prev, *vlan = hapd->conf->vlan; 544 char *tagged_interface = hapd->conf->ssid.vlan_tagged_interface; 545 int vlan_naming = hapd->conf->ssid.vlan_naming; 546 547 wpa_printf(MSG_DEBUG, "VLAN: vlan_dellink(%s)", ifname); 548 549 first = prev = vlan; 550 551 while (vlan) { 552 if (os_strcmp(ifname, vlan->ifname) == 0) { 553 os_snprintf(br_name, sizeof(br_name), "brvlan%d", 554 vlan->vlan_id); 555 556 if (vlan->clean & DVLAN_CLEAN_WLAN_PORT) 557 br_delif(br_name, vlan->ifname); 558 559 if (tagged_interface) { 560 if (vlan_naming == 561 DYNAMIC_VLAN_NAMING_WITH_DEVICE) 562 os_snprintf(vlan_ifname, 563 sizeof(vlan_ifname), 564 "%s.%d", tagged_interface, 565 vlan->vlan_id); 566 else 567 os_snprintf(vlan_ifname, 568 sizeof(vlan_ifname), 569 "vlan%d", vlan->vlan_id); 570 if (vlan->clean & DVLAN_CLEAN_VLAN_PORT) 571 br_delif(br_name, vlan_ifname); 572 ifconfig_down(vlan_ifname); 573 574 if (vlan->clean & DVLAN_CLEAN_VLAN) 575 vlan_rem(vlan_ifname); 576 } 577 578 if ((vlan->clean & DVLAN_CLEAN_BR) && 579 br_getnumports(br_name) == 0) { 580 ifconfig_down(br_name); 581 br_delbr(br_name); 582 } 583 584 if (vlan == first) { 585 hapd->conf->vlan = vlan->next; 586 } else { 587 prev->next = vlan->next; 588 } 589 os_free(vlan); 590 591 break; 592 } 593 prev = vlan; 594 vlan = vlan->next; 595 } 596} 597 598 599static void 600vlan_read_ifnames(struct nlmsghdr *h, size_t len, int del, 601 struct hostapd_data *hapd) 602{ 603 struct ifinfomsg *ifi; 604 int attrlen, nlmsg_len, rta_len; 605 struct rtattr *attr; 606 607 if (len < sizeof(*ifi)) 608 return; 609 610 ifi = NLMSG_DATA(h); 611 612 nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg)); 613 614 attrlen = h->nlmsg_len - nlmsg_len; 615 if (attrlen < 0) 616 return; 617 618 attr = (struct rtattr *) (((char *) ifi) + nlmsg_len); 619 620 rta_len = RTA_ALIGN(sizeof(struct rtattr)); 621 while (RTA_OK(attr, attrlen)) { 622 char ifname[IFNAMSIZ + 1]; 623 624 if (attr->rta_type == IFLA_IFNAME) { 625 int n = attr->rta_len - rta_len; 626 if (n < 0) 627 break; 628 629 os_memset(ifname, 0, sizeof(ifname)); 630 631 if ((size_t) n > sizeof(ifname)) 632 n = sizeof(ifname); 633 os_memcpy(ifname, ((char *) attr) + rta_len, n); 634 635 if (del) 636 vlan_dellink(ifname, hapd); 637 else 638 vlan_newlink(ifname, hapd); 639 } 640 641 attr = RTA_NEXT(attr, attrlen); 642 } 643} 644 645 646static void vlan_event_receive(int sock, void *eloop_ctx, void *sock_ctx) 647{ 648 char buf[8192]; 649 int left; 650 struct sockaddr_nl from; 651 socklen_t fromlen; 652 struct nlmsghdr *h; 653 struct hostapd_data *hapd = eloop_ctx; 654 655 fromlen = sizeof(from); 656 left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT, 657 (struct sockaddr *) &from, &fromlen); 658 if (left < 0) { 659 if (errno != EINTR && errno != EAGAIN) 660 wpa_printf(MSG_ERROR, "VLAN: %s: recvfrom failed: %s", 661 __func__, strerror(errno)); 662 return; 663 } 664 665 h = (struct nlmsghdr *) buf; 666 while (left >= (int) sizeof(*h)) { 667 int len, plen; 668 669 len = h->nlmsg_len; 670 plen = len - sizeof(*h); 671 if (len > left || plen < 0) { 672 wpa_printf(MSG_DEBUG, "VLAN: Malformed netlink " 673 "message: len=%d left=%d plen=%d", 674 len, left, plen); 675 break; 676 } 677 678 switch (h->nlmsg_type) { 679 case RTM_NEWLINK: 680 vlan_read_ifnames(h, plen, 0, hapd); 681 break; 682 case RTM_DELLINK: 683 vlan_read_ifnames(h, plen, 1, hapd); 684 break; 685 } 686 687 len = NLMSG_ALIGN(len); 688 left -= len; 689 h = (struct nlmsghdr *) ((char *) h + len); 690 } 691 692 if (left > 0) { 693 wpa_printf(MSG_DEBUG, "VLAN: %s: %d extra bytes in the end of " 694 "netlink message", __func__, left); 695 } 696} 697 698 699static struct full_dynamic_vlan * 700full_dynamic_vlan_init(struct hostapd_data *hapd) 701{ 702 struct sockaddr_nl local; 703 struct full_dynamic_vlan *priv; 704 705 priv = os_zalloc(sizeof(*priv)); 706 if (priv == NULL) 707 return NULL; 708 709#ifndef CONFIG_VLAN_NETLINK 710 vlan_set_name_type(hapd->conf->ssid.vlan_naming == 711 DYNAMIC_VLAN_NAMING_WITH_DEVICE ? 712 VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD : 713 VLAN_NAME_TYPE_PLUS_VID_NO_PAD); 714#endif /* CONFIG_VLAN_NETLINK */ 715 716 priv->s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); 717 if (priv->s < 0) { 718 wpa_printf(MSG_ERROR, "VLAN: %s: socket(PF_NETLINK,SOCK_RAW," 719 "NETLINK_ROUTE) failed: %s", 720 __func__, strerror(errno)); 721 os_free(priv); 722 return NULL; 723 } 724 725 os_memset(&local, 0, sizeof(local)); 726 local.nl_family = AF_NETLINK; 727 local.nl_groups = RTMGRP_LINK; 728 if (bind(priv->s, (struct sockaddr *) &local, sizeof(local)) < 0) { 729 wpa_printf(MSG_ERROR, "VLAN: %s: bind(netlink) failed: %s", 730 __func__, strerror(errno)); 731 close(priv->s); 732 os_free(priv); 733 return NULL; 734 } 735 736 if (eloop_register_read_sock(priv->s, vlan_event_receive, hapd, NULL)) 737 { 738 close(priv->s); 739 os_free(priv); 740 return NULL; 741 } 742 743 return priv; 744} 745 746 747static void full_dynamic_vlan_deinit(struct full_dynamic_vlan *priv) 748{ 749 if (priv == NULL) 750 return; 751 eloop_unregister_read_sock(priv->s); 752 close(priv->s); 753 os_free(priv); 754} 755#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 756 757 758int vlan_setup_encryption_dyn(struct hostapd_data *hapd, 759 struct hostapd_ssid *mssid, const char *dyn_vlan) 760{ 761 int i; 762 763 if (dyn_vlan == NULL) 764 return 0; 765 766 /* Static WEP keys are set here; IEEE 802.1X and WPA uses their own 767 * functions for setting up dynamic broadcast keys. */ 768 for (i = 0; i < 4; i++) { 769 if (mssid->wep.key[i] && 770 hostapd_drv_set_key(dyn_vlan, hapd, WPA_ALG_WEP, NULL, i, 771 i == mssid->wep.idx, NULL, 0, 772 mssid->wep.key[i], mssid->wep.len[i])) 773 { 774 wpa_printf(MSG_ERROR, "VLAN: Could not set WEP " 775 "encryption for dynamic VLAN"); 776 return -1; 777 } 778 } 779 780 return 0; 781} 782 783 784static int vlan_dynamic_add(struct hostapd_data *hapd, 785 struct hostapd_vlan *vlan) 786{ 787 while (vlan) { 788 if (vlan->vlan_id != VLAN_ID_WILDCARD) { 789 if (hostapd_vlan_if_add(hapd, vlan->ifname)) { 790 if (errno != EEXIST) { 791 wpa_printf(MSG_ERROR, "VLAN: Could " 792 "not add VLAN %s: %s", 793 vlan->ifname, 794 strerror(errno)); 795 return -1; 796 } 797 } 798#ifdef CONFIG_FULL_DYNAMIC_VLAN 799 ifconfig_up(vlan->ifname); 800#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 801 } 802 803 vlan = vlan->next; 804 } 805 806 return 0; 807} 808 809 810static void vlan_dynamic_remove(struct hostapd_data *hapd, 811 struct hostapd_vlan *vlan) 812{ 813 struct hostapd_vlan *next; 814 815 while (vlan) { 816 next = vlan->next; 817 818 if (vlan->vlan_id != VLAN_ID_WILDCARD && 819 hostapd_vlan_if_remove(hapd, vlan->ifname)) { 820 wpa_printf(MSG_ERROR, "VLAN: Could not remove VLAN " 821 "iface: %s: %s", 822 vlan->ifname, strerror(errno)); 823 } 824#ifdef CONFIG_FULL_DYNAMIC_VLAN 825 if (vlan->clean) 826 vlan_dellink(vlan->ifname, hapd); 827#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 828 829 vlan = next; 830 } 831} 832 833 834int vlan_init(struct hostapd_data *hapd) 835{ 836#ifdef CONFIG_FULL_DYNAMIC_VLAN 837 hapd->full_dynamic_vlan = full_dynamic_vlan_init(hapd); 838#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 839 840 if (hapd->conf->ssid.dynamic_vlan != DYNAMIC_VLAN_DISABLED && 841 !hapd->conf->vlan) { 842 /* dynamic vlans enabled but no (or empty) vlan_file given */ 843 struct hostapd_vlan *vlan; 844 vlan = os_zalloc(sizeof(*vlan)); 845 if (vlan == NULL) { 846 wpa_printf(MSG_ERROR, "Out of memory while assigning " 847 "VLAN interfaces"); 848 return -1; 849 } 850 851 vlan->vlan_id = VLAN_ID_WILDCARD; 852 os_snprintf(vlan->ifname, sizeof(vlan->ifname), "%s.#", 853 hapd->conf->iface); 854 if (hapd->conf->vlan_tail) 855 hapd->conf->vlan_tail->next = vlan; 856 else 857 hapd->conf->vlan = vlan; 858 hapd->conf->vlan_tail = vlan; 859 } 860 861 if (vlan_dynamic_add(hapd, hapd->conf->vlan)) 862 return -1; 863 864 return 0; 865} 866 867 868void vlan_deinit(struct hostapd_data *hapd) 869{ 870 vlan_dynamic_remove(hapd, hapd->conf->vlan); 871 872#ifdef CONFIG_FULL_DYNAMIC_VLAN 873 full_dynamic_vlan_deinit(hapd->full_dynamic_vlan); 874#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 875} 876 877 878struct hostapd_vlan * vlan_add_dynamic(struct hostapd_data *hapd, 879 struct hostapd_vlan *vlan, 880 int vlan_id) 881{ 882 struct hostapd_vlan *n; 883 char *ifname, *pos; 884 885 if (vlan == NULL || vlan_id <= 0 || vlan_id > MAX_VLAN_ID || 886 vlan->vlan_id != VLAN_ID_WILDCARD) 887 return NULL; 888 889 wpa_printf(MSG_DEBUG, "VLAN: %s(vlan_id=%d ifname=%s)", 890 __func__, vlan_id, vlan->ifname); 891 ifname = os_strdup(vlan->ifname); 892 if (ifname == NULL) 893 return NULL; 894 pos = os_strchr(ifname, '#'); 895 if (pos == NULL) { 896 os_free(ifname); 897 return NULL; 898 } 899 *pos++ = '\0'; 900 901 n = os_zalloc(sizeof(*n)); 902 if (n == NULL) { 903 os_free(ifname); 904 return NULL; 905 } 906 907 n->vlan_id = vlan_id; 908 n->dynamic_vlan = 1; 909 910 os_snprintf(n->ifname, sizeof(n->ifname), "%s%d%s", ifname, vlan_id, 911 pos); 912 os_free(ifname); 913 914 if (hostapd_vlan_if_add(hapd, n->ifname)) { 915 os_free(n); 916 return NULL; 917 } 918 919 n->next = hapd->conf->vlan; 920 hapd->conf->vlan = n; 921 922#ifdef CONFIG_FULL_DYNAMIC_VLAN 923 ifconfig_up(n->ifname); 924#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 925 926 return n; 927} 928 929 930int vlan_remove_dynamic(struct hostapd_data *hapd, int vlan_id) 931{ 932 struct hostapd_vlan *vlan; 933 934 if (vlan_id <= 0 || vlan_id > MAX_VLAN_ID) 935 return 1; 936 937 wpa_printf(MSG_DEBUG, "VLAN: %s(vlan_id=%d)", __func__, vlan_id); 938 939 vlan = hapd->conf->vlan; 940 while (vlan) { 941 if (vlan->vlan_id == vlan_id && vlan->dynamic_vlan > 0) { 942 vlan->dynamic_vlan--; 943 break; 944 } 945 vlan = vlan->next; 946 } 947 948 if (vlan == NULL) 949 return 1; 950 951 if (vlan->dynamic_vlan == 0) 952 hostapd_vlan_if_remove(hapd, vlan->ifname); 953 954 return 0; 955} 956