1/* 2 * WPA Supplicant - privilege separated driver interface 3 * Copyright (c) 2007-2009, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "includes.h" 10#include <sys/un.h> 11 12#include "common.h" 13#include "driver.h" 14#include "eloop.h" 15#include "common/privsep_commands.h" 16 17 18struct wpa_driver_privsep_data { 19 void *ctx; 20 u8 own_addr[ETH_ALEN]; 21 int priv_socket; 22 char *own_socket_path; 23 int cmd_socket; 24 char *own_cmd_path; 25 struct sockaddr_un priv_addr; 26 char ifname[16]; 27}; 28 29 30static int wpa_priv_reg_cmd(struct wpa_driver_privsep_data *drv, int cmd) 31{ 32 int res; 33 34 res = sendto(drv->priv_socket, &cmd, sizeof(cmd), 0, 35 (struct sockaddr *) &drv->priv_addr, 36 sizeof(drv->priv_addr)); 37 if (res < 0) 38 wpa_printf(MSG_ERROR, "sendto: %s", strerror(errno)); 39 return res < 0 ? -1 : 0; 40} 41 42 43static int wpa_priv_cmd(struct wpa_driver_privsep_data *drv, int cmd, 44 const void *data, size_t data_len, 45 void *reply, size_t *reply_len) 46{ 47 struct msghdr msg; 48 struct iovec io[2]; 49 50 io[0].iov_base = &cmd; 51 io[0].iov_len = sizeof(cmd); 52 io[1].iov_base = (u8 *) data; 53 io[1].iov_len = data_len; 54 55 os_memset(&msg, 0, sizeof(msg)); 56 msg.msg_iov = io; 57 msg.msg_iovlen = data ? 2 : 1; 58 msg.msg_name = &drv->priv_addr; 59 msg.msg_namelen = sizeof(drv->priv_addr); 60 61 if (sendmsg(drv->cmd_socket, &msg, 0) < 0) { 62 wpa_printf(MSG_ERROR, "sendmsg(cmd_socket): %s", 63 strerror(errno)); 64 return -1; 65 } 66 67 if (reply) { 68 fd_set rfds; 69 struct timeval tv; 70 int res; 71 72 FD_ZERO(&rfds); 73 FD_SET(drv->cmd_socket, &rfds); 74 tv.tv_sec = 5; 75 tv.tv_usec = 0; 76 res = select(drv->cmd_socket + 1, &rfds, NULL, NULL, &tv); 77 if (res < 0 && errno != EINTR) { 78 wpa_printf(MSG_ERROR, "select: %s", strerror(errno)); 79 return -1; 80 } 81 82 if (FD_ISSET(drv->cmd_socket, &rfds)) { 83 res = recv(drv->cmd_socket, reply, *reply_len, 0); 84 if (res < 0) { 85 wpa_printf(MSG_ERROR, "recv: %s", 86 strerror(errno)); 87 return -1; 88 } 89 *reply_len = res; 90 } else { 91 wpa_printf(MSG_DEBUG, "PRIVSEP: Timeout while waiting " 92 "for reply (cmd=%d)", cmd); 93 return -1; 94 } 95 } 96 97 return 0; 98} 99 100 101static int wpa_driver_privsep_scan(void *priv, 102 struct wpa_driver_scan_params *params) 103{ 104 struct wpa_driver_privsep_data *drv = priv; 105 struct privsep_cmd_scan scan; 106 size_t i; 107 108 wpa_printf(MSG_DEBUG, "%s: priv=%p", __func__, priv); 109 os_memset(&scan, 0, sizeof(scan)); 110 scan.num_ssids = params->num_ssids; 111 for (i = 0; i < params->num_ssids; i++) { 112 if (!params->ssids[i].ssid) 113 continue; 114 scan.ssid_lens[i] = params->ssids[i].ssid_len; 115 os_memcpy(scan.ssids[i], params->ssids[i].ssid, 116 scan.ssid_lens[i]); 117 } 118 119 for (i = 0; i < PRIVSEP_MAX_SCAN_FREQS && 120 params->freqs && params->freqs[i]; i++) 121 scan.freqs[i] = params->freqs[i]; 122 scan.num_freqs = i; 123 124 return wpa_priv_cmd(drv, PRIVSEP_CMD_SCAN, &scan, sizeof(scan), 125 NULL, NULL); 126} 127 128 129static struct wpa_scan_results * 130wpa_driver_privsep_get_scan_results2(void *priv) 131{ 132 struct wpa_driver_privsep_data *drv = priv; 133 int res, num; 134 u8 *buf, *pos, *end; 135 size_t reply_len = 60000; 136 struct wpa_scan_results *results; 137 struct wpa_scan_res *r; 138 139 buf = os_malloc(reply_len); 140 if (buf == NULL) 141 return NULL; 142 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_SCAN_RESULTS, 143 NULL, 0, buf, &reply_len); 144 if (res < 0) { 145 os_free(buf); 146 return NULL; 147 } 148 149 wpa_printf(MSG_DEBUG, "privsep: Received %lu bytes of scan results", 150 (unsigned long) reply_len); 151 if (reply_len < sizeof(int)) { 152 wpa_printf(MSG_DEBUG, "privsep: Invalid scan result len %lu", 153 (unsigned long) reply_len); 154 os_free(buf); 155 return NULL; 156 } 157 158 pos = buf; 159 end = buf + reply_len; 160 os_memcpy(&num, pos, sizeof(int)); 161 if (num < 0 || num > 1000) { 162 os_free(buf); 163 return NULL; 164 } 165 pos += sizeof(int); 166 167 results = os_zalloc(sizeof(*results)); 168 if (results == NULL) { 169 os_free(buf); 170 return NULL; 171 } 172 173 results->res = os_calloc(num, sizeof(struct wpa_scan_res *)); 174 if (results->res == NULL) { 175 os_free(results); 176 os_free(buf); 177 return NULL; 178 } 179 180 while (results->num < (size_t) num && end - pos > (int) sizeof(int)) { 181 int len; 182 os_memcpy(&len, pos, sizeof(int)); 183 pos += sizeof(int); 184 if (len < 0 || len > 10000 || len > end - pos) 185 break; 186 187 r = os_memdup(pos, len); 188 if (r == NULL) 189 break; 190 pos += len; 191 if (sizeof(*r) + r->ie_len + r->beacon_ie_len > (size_t) len) { 192 wpa_printf(MSG_ERROR, 193 "privsep: Invalid scan result len (%d + %d + %d > %d)", 194 (int) sizeof(*r), (int) r->ie_len, 195 (int) r->beacon_ie_len, len); 196 os_free(r); 197 break; 198 } 199 200 results->res[results->num++] = r; 201 } 202 203 os_free(buf); 204 return results; 205} 206 207 208static int wpa_driver_privsep_set_key(void *priv, 209 struct wpa_driver_set_key_params *params) 210{ 211 struct wpa_driver_privsep_data *drv = priv; 212 struct privsep_cmd_set_key cmd; 213 enum wpa_alg alg = params->alg; 214 const u8 *addr = params->addr; 215 int key_idx = params->key_idx; 216 int set_tx = params->set_tx; 217 const u8 *seq = params->seq; 218 size_t seq_len = params->seq_len; 219 const u8 *key = params->key; 220 size_t key_len = params->key_len; 221 222 wpa_printf(MSG_DEBUG, "%s: priv=%p alg=%d key_idx=%d set_tx=%d", 223 __func__, priv, alg, key_idx, set_tx); 224 225 os_memset(&cmd, 0, sizeof(cmd)); 226 cmd.alg = alg; 227 if (addr) 228 os_memcpy(cmd.addr, addr, ETH_ALEN); 229 else 230 os_memset(cmd.addr, 0xff, ETH_ALEN); 231 cmd.key_idx = key_idx; 232 cmd.set_tx = set_tx; 233 cmd.key_flag = params->key_flag; 234 if (seq && seq_len > 0 && seq_len < sizeof(cmd.seq)) { 235 os_memcpy(cmd.seq, seq, seq_len); 236 cmd.seq_len = seq_len; 237 } 238 if (key && key_len > 0 && key_len < sizeof(cmd.key)) { 239 os_memcpy(cmd.key, key, key_len); 240 cmd.key_len = key_len; 241 } 242 243 return wpa_priv_cmd(drv, PRIVSEP_CMD_SET_KEY, &cmd, sizeof(cmd), 244 NULL, NULL); 245} 246 247 248static int wpa_driver_privsep_authenticate( 249 void *priv, struct wpa_driver_auth_params *params) 250{ 251 struct wpa_driver_privsep_data *drv = priv; 252 struct privsep_cmd_authenticate *data; 253 int i, res; 254 size_t buflen; 255 u8 *pos; 256 257 wpa_printf(MSG_DEBUG, "%s: priv=%p freq=%d bssid=" MACSTR 258 " auth_alg=%d local_state_change=%d p2p=%d", 259 __func__, priv, params->freq, MAC2STR(params->bssid), 260 params->auth_alg, params->local_state_change, params->p2p); 261 262 buflen = sizeof(*data) + params->ie_len + params->auth_data_len; 263 data = os_zalloc(buflen); 264 if (data == NULL) 265 return -1; 266 267 data->freq = params->freq; 268 os_memcpy(data->bssid, params->bssid, ETH_ALEN); 269 os_memcpy(data->ssid, params->ssid, params->ssid_len); 270 data->ssid_len = params->ssid_len; 271 data->auth_alg = params->auth_alg; 272 data->ie_len = params->ie_len; 273 for (i = 0; i < 4; i++) { 274 if (params->wep_key[i]) 275 os_memcpy(data->wep_key[i], params->wep_key[i], 276 params->wep_key_len[i]); 277 data->wep_key_len[i] = params->wep_key_len[i]; 278 } 279 data->wep_tx_keyidx = params->wep_tx_keyidx; 280 data->local_state_change = params->local_state_change; 281 data->p2p = params->p2p; 282 pos = (u8 *) (data + 1); 283 if (params->ie_len) { 284 os_memcpy(pos, params->ie, params->ie_len); 285 pos += params->ie_len; 286 } 287 if (params->auth_data_len) 288 os_memcpy(pos, params->auth_data, params->auth_data_len); 289 290 res = wpa_priv_cmd(drv, PRIVSEP_CMD_AUTHENTICATE, data, buflen, 291 NULL, NULL); 292 os_free(data); 293 294 return res; 295} 296 297 298static int wpa_driver_privsep_associate( 299 void *priv, struct wpa_driver_associate_params *params) 300{ 301 struct wpa_driver_privsep_data *drv = priv; 302 struct privsep_cmd_associate *data; 303 int res; 304 size_t buflen; 305 306 wpa_printf(MSG_DEBUG, "%s: priv=%p freq=%d pairwise_suite=%d " 307 "group_suite=%d key_mgmt_suite=%d auth_alg=%d mode=%d", 308 __func__, priv, params->freq.freq, params->pairwise_suite, 309 params->group_suite, params->key_mgmt_suite, 310 params->auth_alg, params->mode); 311 312 buflen = sizeof(*data) + params->wpa_ie_len; 313 data = os_zalloc(buflen); 314 if (data == NULL) 315 return -1; 316 317 if (params->bssid) 318 os_memcpy(data->bssid, params->bssid, ETH_ALEN); 319 os_memcpy(data->ssid, params->ssid, params->ssid_len); 320 data->ssid_len = params->ssid_len; 321 data->hwmode = params->freq.mode; 322 data->freq = params->freq.freq; 323 data->channel = params->freq.channel; 324 data->pairwise_suite = params->pairwise_suite; 325 data->group_suite = params->group_suite; 326 data->key_mgmt_suite = params->key_mgmt_suite; 327 data->auth_alg = params->auth_alg; 328 data->mode = params->mode; 329 data->wpa_ie_len = params->wpa_ie_len; 330 if (params->wpa_ie) 331 os_memcpy(data + 1, params->wpa_ie, params->wpa_ie_len); 332 /* TODO: add support for other assoc parameters */ 333 334 res = wpa_priv_cmd(drv, PRIVSEP_CMD_ASSOCIATE, data, buflen, 335 NULL, NULL); 336 os_free(data); 337 338 return res; 339} 340 341 342static int wpa_driver_privsep_get_bssid(void *priv, u8 *bssid) 343{ 344 struct wpa_driver_privsep_data *drv = priv; 345 int res; 346 size_t len = ETH_ALEN; 347 348 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_BSSID, NULL, 0, bssid, &len); 349 if (res < 0 || len != ETH_ALEN) 350 return -1; 351 return 0; 352} 353 354 355static int wpa_driver_privsep_get_ssid(void *priv, u8 *ssid) 356{ 357 struct wpa_driver_privsep_data *drv = priv; 358 int res, ssid_len; 359 u8 reply[sizeof(int) + SSID_MAX_LEN]; 360 size_t len = sizeof(reply); 361 362 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_SSID, NULL, 0, reply, &len); 363 if (res < 0 || len < sizeof(int)) 364 return -1; 365 os_memcpy(&ssid_len, reply, sizeof(int)); 366 if (ssid_len < 0 || ssid_len > SSID_MAX_LEN || 367 sizeof(int) + ssid_len > len) { 368 wpa_printf(MSG_DEBUG, "privsep: Invalid get SSID reply"); 369 return -1; 370 } 371 os_memcpy(ssid, &reply[sizeof(int)], ssid_len); 372 return ssid_len; 373} 374 375 376static int wpa_driver_privsep_deauthenticate(void *priv, const u8 *addr, 377 u16 reason_code) 378{ 379 //struct wpa_driver_privsep_data *drv = priv; 380 wpa_printf(MSG_DEBUG, "%s addr=" MACSTR " reason_code=%d", 381 __func__, MAC2STR(addr), reason_code); 382 wpa_printf(MSG_DEBUG, "%s - TODO", __func__); 383 return 0; 384} 385 386 387static void wpa_driver_privsep_event_auth(void *ctx, u8 *buf, size_t len) 388{ 389 union wpa_event_data data; 390 struct privsep_event_auth *auth; 391 392 os_memset(&data, 0, sizeof(data)); 393 if (len < sizeof(*auth)) 394 return; 395 auth = (struct privsep_event_auth *) buf; 396 if (len < sizeof(*auth) + auth->ies_len) 397 return; 398 399 os_memcpy(data.auth.peer, auth->peer, ETH_ALEN); 400 os_memcpy(data.auth.bssid, auth->bssid, ETH_ALEN); 401 data.auth.auth_type = auth->auth_type; 402 data.auth.auth_transaction = auth->auth_transaction; 403 data.auth.status_code = auth->status_code; 404 if (auth->ies_len) { 405 data.auth.ies = (u8 *) (auth + 1); 406 data.auth.ies_len = auth->ies_len; 407 } 408 409 wpa_supplicant_event(ctx, EVENT_AUTH, &data); 410} 411 412 413static void wpa_driver_privsep_event_assoc(void *ctx, 414 enum wpa_event_type event, 415 u8 *buf, size_t len) 416{ 417 union wpa_event_data data; 418 int inc_data = 0; 419 u8 *pos, *end; 420 int ie_len; 421 422 os_memset(&data, 0, sizeof(data)); 423 424 pos = buf; 425 end = buf + len; 426 427 if (end - pos < (int) sizeof(int)) 428 return; 429 os_memcpy(&ie_len, pos, sizeof(int)); 430 pos += sizeof(int); 431 if (ie_len < 0 || ie_len > end - pos) 432 return; 433 if (ie_len) { 434 data.assoc_info.req_ies = pos; 435 data.assoc_info.req_ies_len = ie_len; 436 pos += ie_len; 437 inc_data = 1; 438 } 439 440 wpa_supplicant_event(ctx, event, inc_data ? &data : NULL); 441} 442 443 444static void wpa_driver_privsep_event_interface_status(void *ctx, u8 *buf, 445 size_t len) 446{ 447 union wpa_event_data data; 448 int ievent; 449 450 if (len < sizeof(int) || 451 len - sizeof(int) > sizeof(data.interface_status.ifname)) 452 return; 453 454 os_memcpy(&ievent, buf, sizeof(int)); 455 456 os_memset(&data, 0, sizeof(data)); 457 data.interface_status.ievent = ievent; 458 os_memcpy(data.interface_status.ifname, buf + sizeof(int), 459 len - sizeof(int)); 460 wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &data); 461} 462 463 464static void wpa_driver_privsep_event_michael_mic_failure( 465 void *ctx, u8 *buf, size_t len) 466{ 467 union wpa_event_data data; 468 469 if (len != sizeof(int)) 470 return; 471 472 os_memset(&data, 0, sizeof(data)); 473 os_memcpy(&data.michael_mic_failure.unicast, buf, sizeof(int)); 474 wpa_supplicant_event(ctx, EVENT_MICHAEL_MIC_FAILURE, &data); 475} 476 477 478static void wpa_driver_privsep_event_pmkid_candidate(void *ctx, u8 *buf, 479 size_t len) 480{ 481 union wpa_event_data data; 482 483 if (len != sizeof(struct pmkid_candidate)) 484 return; 485 486 os_memset(&data, 0, sizeof(data)); 487 os_memcpy(&data.pmkid_candidate, buf, len); 488 wpa_supplicant_event(ctx, EVENT_PMKID_CANDIDATE, &data); 489} 490 491 492static void wpa_driver_privsep_event_ft_response(void *ctx, u8 *buf, 493 size_t len) 494{ 495 union wpa_event_data data; 496 497 if (len < sizeof(int) + ETH_ALEN) 498 return; 499 500 os_memset(&data, 0, sizeof(data)); 501 os_memcpy(&data.ft_ies.ft_action, buf, sizeof(int)); 502 os_memcpy(data.ft_ies.target_ap, buf + sizeof(int), ETH_ALEN); 503 data.ft_ies.ies = buf + sizeof(int) + ETH_ALEN; 504 data.ft_ies.ies_len = len - sizeof(int) - ETH_ALEN; 505 wpa_supplicant_event(ctx, EVENT_FT_RESPONSE, &data); 506} 507 508 509static void wpa_driver_privsep_event_rx_eapol(void *ctx, u8 *buf, size_t len) 510{ 511 if (len < ETH_ALEN) 512 return; 513 drv_event_eapol_rx(ctx, buf, buf + ETH_ALEN, len - ETH_ALEN); 514} 515 516 517static void wpa_driver_privsep_receive(int sock, void *eloop_ctx, 518 void *sock_ctx) 519{ 520 struct wpa_driver_privsep_data *drv = eloop_ctx; 521 u8 *buf, *event_buf; 522 size_t event_len; 523 int res, event; 524 enum privsep_event e; 525 struct sockaddr_un from; 526 socklen_t fromlen = sizeof(from); 527 const size_t buflen = 2000; 528 529 buf = os_malloc(buflen); 530 if (buf == NULL) 531 return; 532 res = recvfrom(sock, buf, buflen, 0, 533 (struct sockaddr *) &from, &fromlen); 534 if (res < 0) { 535 wpa_printf(MSG_ERROR, "recvfrom(priv_socket): %s", 536 strerror(errno)); 537 os_free(buf); 538 return; 539 } 540 541 wpa_printf(MSG_DEBUG, "privsep_driver: received %u bytes", res); 542 543 if (res < (int) sizeof(int)) { 544 wpa_printf(MSG_DEBUG, "Too short event message (len=%d)", res); 545 return; 546 } 547 548 os_memcpy(&event, buf, sizeof(int)); 549 event_buf = &buf[sizeof(int)]; 550 event_len = res - sizeof(int); 551 wpa_printf(MSG_DEBUG, "privsep: Event %d received (len=%lu)", 552 event, (unsigned long) event_len); 553 554 e = event; 555 switch (e) { 556 case PRIVSEP_EVENT_SCAN_RESULTS: 557 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL); 558 break; 559 case PRIVSEP_EVENT_SCAN_STARTED: 560 wpa_supplicant_event(drv->ctx, EVENT_SCAN_STARTED, NULL); 561 break; 562 case PRIVSEP_EVENT_ASSOC: 563 wpa_driver_privsep_event_assoc(drv->ctx, EVENT_ASSOC, 564 event_buf, event_len); 565 break; 566 case PRIVSEP_EVENT_DISASSOC: 567 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL); 568 break; 569 case PRIVSEP_EVENT_ASSOCINFO: 570 wpa_driver_privsep_event_assoc(drv->ctx, EVENT_ASSOCINFO, 571 event_buf, event_len); 572 break; 573 case PRIVSEP_EVENT_MICHAEL_MIC_FAILURE: 574 wpa_driver_privsep_event_michael_mic_failure( 575 drv->ctx, event_buf, event_len); 576 break; 577 case PRIVSEP_EVENT_INTERFACE_STATUS: 578 wpa_driver_privsep_event_interface_status(drv->ctx, event_buf, 579 event_len); 580 break; 581 case PRIVSEP_EVENT_PMKID_CANDIDATE: 582 wpa_driver_privsep_event_pmkid_candidate(drv->ctx, event_buf, 583 event_len); 584 break; 585 case PRIVSEP_EVENT_FT_RESPONSE: 586 wpa_driver_privsep_event_ft_response(drv->ctx, event_buf, 587 event_len); 588 break; 589 case PRIVSEP_EVENT_RX_EAPOL: 590 wpa_driver_privsep_event_rx_eapol(drv->ctx, event_buf, 591 event_len); 592 break; 593 case PRIVSEP_EVENT_AUTH: 594 wpa_driver_privsep_event_auth(drv->ctx, event_buf, event_len); 595 break; 596 } 597 598 os_free(buf); 599} 600 601 602static void * wpa_driver_privsep_init(void *ctx, const char *ifname) 603{ 604 struct wpa_driver_privsep_data *drv; 605 606 drv = os_zalloc(sizeof(*drv)); 607 if (drv == NULL) 608 return NULL; 609 drv->ctx = ctx; 610 drv->priv_socket = -1; 611 drv->cmd_socket = -1; 612 os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)); 613 614 return drv; 615} 616 617 618static void wpa_driver_privsep_deinit(void *priv) 619{ 620 struct wpa_driver_privsep_data *drv = priv; 621 622 if (drv->priv_socket >= 0) { 623 wpa_priv_reg_cmd(drv, PRIVSEP_CMD_UNREGISTER); 624 eloop_unregister_read_sock(drv->priv_socket); 625 close(drv->priv_socket); 626 } 627 628 if (drv->own_socket_path) { 629 unlink(drv->own_socket_path); 630 os_free(drv->own_socket_path); 631 } 632 633 if (drv->cmd_socket >= 0) { 634 eloop_unregister_read_sock(drv->cmd_socket); 635 close(drv->cmd_socket); 636 } 637 638 if (drv->own_cmd_path) { 639 unlink(drv->own_cmd_path); 640 os_free(drv->own_cmd_path); 641 } 642 643 os_free(drv); 644} 645 646 647static int wpa_driver_privsep_set_param(void *priv, const char *param) 648{ 649 struct wpa_driver_privsep_data *drv = priv; 650 const char *pos; 651 char *own_dir, *priv_dir; 652 static unsigned int counter = 0; 653 size_t len; 654 struct sockaddr_un addr; 655 656 wpa_printf(MSG_DEBUG, "%s: param='%s'", __func__, param); 657 if (param == NULL) 658 pos = NULL; 659 else 660 pos = os_strstr(param, "own_dir="); 661 if (pos) { 662 char *end; 663 own_dir = os_strdup(pos + 8); 664 if (own_dir == NULL) 665 return -1; 666 end = os_strchr(own_dir, ' '); 667 if (end) 668 *end = '\0'; 669 } else { 670 own_dir = os_strdup("/tmp"); 671 if (own_dir == NULL) 672 return -1; 673 } 674 675 if (param == NULL) 676 pos = NULL; 677 else 678 pos = os_strstr(param, "priv_dir="); 679 if (pos) { 680 char *end; 681 priv_dir = os_strdup(pos + 9); 682 if (priv_dir == NULL) { 683 os_free(own_dir); 684 return -1; 685 } 686 end = os_strchr(priv_dir, ' '); 687 if (end) 688 *end = '\0'; 689 } else { 690 priv_dir = os_strdup("/var/run/wpa_priv"); 691 if (priv_dir == NULL) { 692 os_free(own_dir); 693 return -1; 694 } 695 } 696 697 len = os_strlen(own_dir) + 50; 698 drv->own_socket_path = os_malloc(len); 699 if (drv->own_socket_path == NULL) { 700 os_free(priv_dir); 701 os_free(own_dir); 702 return -1; 703 } 704 os_snprintf(drv->own_socket_path, len, "%s/wpa_privsep-%d-%d", 705 own_dir, getpid(), counter++); 706 707 len = os_strlen(own_dir) + 50; 708 drv->own_cmd_path = os_malloc(len); 709 if (drv->own_cmd_path == NULL) { 710 os_free(drv->own_socket_path); 711 drv->own_socket_path = NULL; 712 os_free(priv_dir); 713 os_free(own_dir); 714 return -1; 715 } 716 os_snprintf(drv->own_cmd_path, len, "%s/wpa_privsep-%d-%d", 717 own_dir, getpid(), counter++); 718 719 os_free(own_dir); 720 721 drv->priv_addr.sun_family = AF_UNIX; 722 os_snprintf(drv->priv_addr.sun_path, sizeof(drv->priv_addr.sun_path), 723 "%s/%s", priv_dir, drv->ifname); 724 os_free(priv_dir); 725 726 drv->priv_socket = socket(PF_UNIX, SOCK_DGRAM, 0); 727 if (drv->priv_socket < 0) { 728 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno)); 729 os_free(drv->own_socket_path); 730 drv->own_socket_path = NULL; 731 return -1; 732 } 733 734 os_memset(&addr, 0, sizeof(addr)); 735 addr.sun_family = AF_UNIX; 736 os_strlcpy(addr.sun_path, drv->own_socket_path, sizeof(addr.sun_path)); 737 if (bind(drv->priv_socket, (struct sockaddr *) &addr, sizeof(addr)) < 738 0) { 739 wpa_printf(MSG_ERROR, 740 "privsep-set-params priv-sock: bind(PF_UNIX): %s", 741 strerror(errno)); 742 close(drv->priv_socket); 743 drv->priv_socket = -1; 744 unlink(drv->own_socket_path); 745 os_free(drv->own_socket_path); 746 drv->own_socket_path = NULL; 747 return -1; 748 } 749 750 eloop_register_read_sock(drv->priv_socket, wpa_driver_privsep_receive, 751 drv, NULL); 752 753 drv->cmd_socket = socket(PF_UNIX, SOCK_DGRAM, 0); 754 if (drv->cmd_socket < 0) { 755 wpa_printf(MSG_ERROR, "socket(PF_UNIX): %s", strerror(errno)); 756 os_free(drv->own_cmd_path); 757 drv->own_cmd_path = NULL; 758 return -1; 759 } 760 761 os_memset(&addr, 0, sizeof(addr)); 762 addr.sun_family = AF_UNIX; 763 os_strlcpy(addr.sun_path, drv->own_cmd_path, sizeof(addr.sun_path)); 764 if (bind(drv->cmd_socket, (struct sockaddr *) &addr, sizeof(addr)) < 0) 765 { 766 wpa_printf(MSG_ERROR, 767 "privsep-set-params cmd-sock: bind(PF_UNIX): %s", 768 strerror(errno)); 769 close(drv->cmd_socket); 770 drv->cmd_socket = -1; 771 unlink(drv->own_cmd_path); 772 os_free(drv->own_cmd_path); 773 drv->own_cmd_path = NULL; 774 return -1; 775 } 776 777 if (wpa_priv_reg_cmd(drv, PRIVSEP_CMD_REGISTER) < 0) { 778 wpa_printf(MSG_ERROR, "Failed to register with wpa_priv"); 779 return -1; 780 } 781 782 return 0; 783} 784 785 786static int wpa_driver_privsep_get_capa(void *priv, 787 struct wpa_driver_capa *capa) 788{ 789 struct wpa_driver_privsep_data *drv = priv; 790 int res; 791 size_t len = sizeof(*capa); 792 793 res = wpa_priv_cmd(drv, PRIVSEP_CMD_GET_CAPA, NULL, 0, capa, &len); 794 if (res < 0 || len != sizeof(*capa)) 795 return -1; 796 /* For now, no support for passing extended_capa pointers */ 797 capa->extended_capa = NULL; 798 capa->extended_capa_mask = NULL; 799 capa->extended_capa_len = 0; 800 /* Control port is not yet supported */ 801 capa->flags &= ~WPA_DRIVER_FLAGS_CONTROL_PORT; 802 return 0; 803} 804 805 806static const u8 * wpa_driver_privsep_get_mac_addr(void *priv) 807{ 808 struct wpa_driver_privsep_data *drv = priv; 809 wpa_printf(MSG_DEBUG, "%s", __func__); 810 return drv->own_addr; 811} 812 813 814static int wpa_driver_privsep_set_country(void *priv, const char *alpha2) 815{ 816 struct wpa_driver_privsep_data *drv = priv; 817 wpa_printf(MSG_DEBUG, "%s country='%s'", __func__, alpha2); 818 return wpa_priv_cmd(drv, PRIVSEP_CMD_SET_COUNTRY, alpha2, 819 os_strlen(alpha2), NULL, NULL); 820} 821 822 823struct wpa_driver_ops wpa_driver_privsep_ops = { 824 "privsep", 825 "wpa_supplicant privilege separated driver", 826 .get_bssid = wpa_driver_privsep_get_bssid, 827 .get_ssid = wpa_driver_privsep_get_ssid, 828 .set_key = wpa_driver_privsep_set_key, 829 .init = wpa_driver_privsep_init, 830 .deinit = wpa_driver_privsep_deinit, 831 .set_param = wpa_driver_privsep_set_param, 832 .scan2 = wpa_driver_privsep_scan, 833 .deauthenticate = wpa_driver_privsep_deauthenticate, 834 .authenticate = wpa_driver_privsep_authenticate, 835 .associate = wpa_driver_privsep_associate, 836 .get_capa = wpa_driver_privsep_get_capa, 837 .get_mac_addr = wpa_driver_privsep_get_mac_addr, 838 .get_scan_results2 = wpa_driver_privsep_get_scan_results2, 839 .set_country = wpa_driver_privsep_set_country, 840}; 841 842 843const struct wpa_driver_ops *const wpa_drivers[] = 844{ 845 &wpa_driver_privsep_ops, 846 NULL 847}; 848