hostapd/ctrl_iface.c

   1 /*
   2  * hostapd / UNIX domain socket -based control interface
   3  * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "utils/includes.h"
  16
  17 #ifndef CONFIG_NATIVE_WINDOWS
  18
  19 #include <sys/un.h>
  20 #include <sys/stat.h>
  21 #include <stddef.h>
  22
  23 #include "utils/common.h"
  24 #include "utils/eloop.h"
  25 #include "common/ieee802_11_defs.h"
  26 #include "drivers/driver.h"
  27 #include "radius/radius_client.h"
  28 #include "ap/hostapd.h"
  29 #include "ap/ap_config.h"
  30 #include "ap/ieee802_1x.h"
  31 #include "ap/wpa_auth.h"
  32 #include "ap/ieee802_11.h"
  33 #include "ap/sta_info.h"
  34 #include "ap/accounting.h"
  35 #include "ap/wps_hostapd.h"
  36 #include "ap/ctrl_iface_ap.h"
  37 #include "ctrl_iface.h"
  38
  39
  40 struct wpa_ctrl_dst {
  41         struct wpa_ctrl_dst *next;
  42         struct sockaddr_un addr;
  43         socklen_t addrlen;
  44         int debug_level;
  45         int errors;
  46 };
  47
  48
  49 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
  50                                     const char *buf, size_t len);
  51
  52
  53 static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
  54                                      struct sockaddr_un *from,
  55                                      socklen_t fromlen)
  56 {
  57         struct wpa_ctrl_dst *dst;
  58
  59         dst = os_zalloc(sizeof(*dst));
  60         if (dst == NULL)
  61                 return -1;
  62         os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
  63         dst->addrlen = fromlen;
  64         dst->debug_level = MSG_INFO;
  65         dst->next = hapd->ctrl_dst;
  66         hapd->ctrl_dst = dst;
  67         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
  68                     (u8 *) from->sun_path,
  69                     fromlen - offsetof(struct sockaddr_un, sun_path));
  70         return 0;
  71 }
  72
  73
  74 static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
  75                                      struct sockaddr_un *from,
  76                                      socklen_t fromlen)
  77 {
  78         struct wpa_ctrl_dst *dst, *prev = NULL;
  79
  80         dst = hapd->ctrl_dst;
  81         while (dst) {
  82                 if (fromlen == dst->addrlen &&
  83                     os_memcmp(from->sun_path, dst->addr.sun_path,
  84                               fromlen - offsetof(struct sockaddr_un, sun_path))
  85                     == 0) {
  86                         if (prev == NULL)
  87                                 hapd->ctrl_dst = dst->next;
  88                         else
  89                                 prev->next = dst->next;
  90                         os_free(dst);
  91                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
  92                                     (u8 *) from->sun_path,
  93                                     fromlen -
  94                                     offsetof(struct sockaddr_un, sun_path));
  95                         return 0;
  96                 }
  97                 prev = dst;
  98                 dst = dst->next;
  99         }
 100         return -1;
 101 }
 102
 103
 104 static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
 105                                     struct sockaddr_un *from,
 106                                     socklen_t fromlen,
 107                                     char *level)
 108 {
 109         struct wpa_ctrl_dst *dst;
 110
 111         wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
 112
 113         dst = hapd->ctrl_dst;
 114         while (dst) {
 115                 if (fromlen == dst->addrlen &&
 116                     os_memcmp(from->sun_path, dst->addr.sun_path,
 117                               fromlen - offsetof(struct sockaddr_un, sun_path))
 118                     == 0) {
 119                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
 120                                     "level", (u8 *) from->sun_path, fromlen -
 121                                     offsetof(struct sockaddr_un, sun_path));
 122                         dst->debug_level = atoi(level);
 123                         return 0;
 124                 }
 125                 dst = dst->next;
 126         }
 127
 128         return -1;
 129 }
 130
 131
 132 static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
 133                                       const char *txtaddr)
 134 {
 135         u8 addr[ETH_ALEN];
 136         struct sta_info *sta;
 137
 138         wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
 139
 140         if (hwaddr_aton(txtaddr, addr))
 141                 return -1;
 142
 143         sta = ap_get_sta(hapd, addr);
 144         if (sta)
 145                 return 0;
 146
 147         wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
 148                    "notification", MAC2STR(addr));
 149         sta = ap_sta_add(hapd, addr);
 150         if (sta == NULL)
 151                 return -1;
 152
 153         hostapd_new_assoc_sta(hapd, sta, 0);
 154         return 0;
 155 }
 156
 157
 158 static int hostapd_ctrl_iface_deauthenticate(struct hostapd_data *hapd,
 159                                              const char *txtaddr)
 160 {
 161         u8 addr[ETH_ALEN];
 162         struct sta_info *sta;
 163         const char *pos;
 164
 165         wpa_printf(MSG_DEBUG, "CTRL_IFACE DEAUTHENTICATE %s", txtaddr);
 166
 167         if (hwaddr_aton(txtaddr, addr))
 168                 return -1;
 169
 170         pos = os_strstr(txtaddr, " test=");
 171         if (pos) {
 172                 struct ieee80211_mgmt mgmt;
 173                 int encrypt;
 174                 if (hapd->driver->send_frame == NULL)
 175                         return -1;
 176                 pos += 6;
 177                 encrypt = atoi(pos);
 178                 os_memset(&mgmt, 0, sizeof(mgmt));
 179                 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 180                                                   WLAN_FC_STYPE_DEAUTH);
 181                 os_memcpy(mgmt.da, addr, ETH_ALEN);
 182                 os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 183                 os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 184                 mgmt.u.deauth.reason_code =
 185                         host_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
 186                 if (hapd->driver->send_frame(hapd->drv_priv, (u8 *) &mgmt,
 187                                              IEEE80211_HDRLEN +
 188                                              sizeof(mgmt.u.deauth),
 189                                              encrypt) < 0)
 190                         return -1;
 191                 return 0;
 192         }
 193
 194         hapd->drv.sta_deauth(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 195         sta = ap_get_sta(hapd, addr);
 196         if (sta)
 197                 ap_sta_deauthenticate(hapd, sta,
 198                                       WLAN_REASON_PREV_AUTH_NOT_VALID);
 199
 200         return 0;
 201 }
 202
 203
 204 static int hostapd_ctrl_iface_disassociate(struct hostapd_data *hapd,
 205                                            const char *txtaddr)
 206 {
 207         u8 addr[ETH_ALEN];
 208         struct sta_info *sta;
 209         const char *pos;
 210
 211         wpa_printf(MSG_DEBUG, "CTRL_IFACE DISASSOCIATE %s", txtaddr);
 212
 213         if (hwaddr_aton(txtaddr, addr))
 214                 return -1;
 215
 216         pos = os_strstr(txtaddr, " test=");
 217         if (pos) {
 218                 struct ieee80211_mgmt mgmt;
 219                 int encrypt;
 220                 if (hapd->driver->send_frame == NULL)
 221                         return -1;
 222                 pos += 6;
 223                 encrypt = atoi(pos);
 224                 os_memset(&mgmt, 0, sizeof(mgmt));
 225                 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 226                                                   WLAN_FC_STYPE_DISASSOC);
 227                 os_memcpy(mgmt.da, addr, ETH_ALEN);
 228                 os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
 229                 os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
 230                 mgmt.u.disassoc.reason_code =
 231                         host_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
 232                 if (hapd->driver->send_frame(hapd->drv_priv, (u8 *) &mgmt,
 233                                              IEEE80211_HDRLEN +
 234                                              sizeof(mgmt.u.deauth),
 235                                              encrypt) < 0)
 236                         return -1;
 237                 return 0;
 238         }
 239
 240         hapd->drv.sta_disassoc(hapd, addr, WLAN_REASON_PREV_AUTH_NOT_VALID);
 241         sta = ap_get_sta(hapd, addr);
 242         if (sta)
 243                 ap_sta_disassociate(hapd, sta,
 244                                     WLAN_REASON_PREV_AUTH_NOT_VALID);
 245
 246         return 0;
 247 }
 248
 249
 250 #ifdef CONFIG_IEEE80211W
 251 #ifdef NEED_AP_MLME
 252 static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
 253                                        const char *txtaddr)
 254 {
 255         u8 addr[ETH_ALEN];
 256         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 257
 258         wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
 259
 260         if (hwaddr_aton(txtaddr, addr) ||
 261             os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0)
 262                 return -1;
 263
 264         ieee802_11_send_sa_query_req(hapd, addr, trans_id);
 265
 266         return 0;
 267 }
 268 #endif /* NEED_AP_MLME */
 269 #endif /* CONFIG_IEEE80211W */
 270
 271
 272 #ifdef CONFIG_WPS
 273 static int hostapd_ctrl_iface_wps_pin(struct hostapd_data *hapd, char *txt)
 274 {
 275         char *pin = os_strchr(txt, ' ');
 276         char *timeout_txt;
 277         int timeout;
 278         u8 addr_buf[ETH_ALEN], *addr = NULL;
 279         char *pos;
 280
 281         if (pin == NULL)
 282                 return -1;
 283         *pin++ = '\0';
 284
 285         timeout_txt = os_strchr(pin, ' ');
 286         if (timeout_txt) {
 287                 *timeout_txt++ = '\0';
 288                 timeout = atoi(timeout_txt);
 289                 pos = os_strchr(timeout_txt, ' ');
 290                 if (pos) {
 291                         *pos++ = '\0';
 292                         if (hwaddr_aton(pos, addr_buf) == 0)
 293                                 addr = addr_buf;
 294                 }
 295         } else
 296                 timeout = 0;
 297
 298         return hostapd_wps_add_pin(hapd, addr, txt, pin, timeout);
 299 }
 300
 301
 302 #ifdef CONFIG_WPS_OOB
 303 static int hostapd_ctrl_iface_wps_oob(struct hostapd_data *hapd, char *txt)
 304 {
 305         char *path, *method, *name;
 306
 307         path = os_strchr(txt, ' ');
 308         if (path == NULL)
 309                 return -1;
 310         *path++ = '\0';
 311
 312         method = os_strchr(path, ' ');
 313         if (method == NULL)
 314                 return -1;
 315         *method++ = '\0';
 316
 317         name = os_strchr(method, ' ');
 318         if (name != NULL)
 319                 *name++ = '\0';
 320
 321         return hostapd_wps_start_oob(hapd, txt, path, method, name);
 322 }
 323 #endif /* CONFIG_WPS_OOB */
 324
 325
 326 static int hostapd_ctrl_iface_wps_ap_pin(struct hostapd_data *hapd, char *txt,
 327                                          char *buf, size_t buflen)
 328 {
 329         int timeout = 300;
 330         char *pos;
 331         const char *pin_txt;
 332
 333         pos = os_strchr(txt, ' ');
 334         if (pos)
 335                 *pos++ = '\0';
 336
 337         if (os_strcmp(txt, "disable") == 0) {
 338                 hostapd_wps_ap_pin_disable(hapd);
 339                 return os_snprintf(buf, buflen, "OK\n");
 340         }
 341
 342         if (os_strcmp(txt, "random") == 0) {
 343                 if (pos)
 344                         timeout = atoi(pos);
 345                 pin_txt = hostapd_wps_ap_pin_random(hapd, timeout);
 346                 if (pin_txt == NULL)
 347                         return -1;
 348                 return os_snprintf(buf, buflen, "%s", pin_txt);
 349         }
 350
 351         if (os_strcmp(txt, "get") == 0) {
 352                 pin_txt = hostapd_wps_ap_pin_get(hapd);
 353                 if (pin_txt == NULL)
 354                         return -1;
 355                 return os_snprintf(buf, buflen, "%s", pin_txt);
 356         }
 357
 358         if (os_strcmp(txt, "set") == 0) {
 359                 char *pin;
 360                 if (pos == NULL)
 361                         return -1;
 362                 pin = pos;
 363                 pos = os_strchr(pos, ' ');
 364                 if (pos) {
 365                         *pos++ = '\0';
 366                         timeout = atoi(pos);
 367                 }
 368                 if (os_strlen(pin) > buflen)
 369                         return -1;
 370                 if (hostapd_wps_ap_pin_set(hapd, pin, timeout) < 0)
 371                         return -1;
 372                 return os_snprintf(buf, buflen, "%s", pin);
 373         }
 374
 375         return -1;
 376 }
 377 #endif /* CONFIG_WPS */
 378
 379
 380 static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
 381                                        void *sock_ctx)
 382 {
 383         struct hostapd_data *hapd = eloop_ctx;
 384         char buf[256];
 385         int res;
 386         struct sockaddr_un from;
 387         socklen_t fromlen = sizeof(from);
 388         char *reply;
 389         const int reply_size = 4096;
 390         int reply_len;
 391
 392         res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
 393                        (struct sockaddr *) &from, &fromlen);
 394         if (res < 0) {
 395                 perror("recvfrom(ctrl_iface)");
 396                 return;
 397         }
 398         buf[res] = '\0';
 399         wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
 400
 401         reply = os_malloc(reply_size);
 402         if (reply == NULL) {
 403                 sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
 404                        fromlen);
 405                 return;
 406         }
 407
 408         os_memcpy(reply, "OK\n", 3);
 409         reply_len = 3;
 410
 411         if (os_strcmp(buf, "PING") == 0) {
 412                 os_memcpy(reply, "PONG\n", 5);
 413                 reply_len = 5;
 414         } else if (os_strcmp(buf, "MIB") == 0) {
 415                 reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
 416                 if (reply_len >= 0) {
 417                         res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
 418                                           reply_size - reply_len);
 419                         if (res < 0)
 420                                 reply_len = -1;
 421                         else
 422                                 reply_len += res;
 423                 }
 424                 if (reply_len >= 0) {
 425                         res = ieee802_1x_get_mib(hapd, reply + reply_len,
 426                                                  reply_size - reply_len);
 427                         if (res < 0)
 428                                 reply_len = -1;
 429                         else
 430                                 reply_len += res;
 431                 }
 432 #ifndef CONFIG_NO_RADIUS
 433                 if (reply_len >= 0) {
 434                         res = radius_client_get_mib(hapd->radius,
 435                                                     reply + reply_len,
 436                                                     reply_size - reply_len);
 437                         if (res < 0)
 438                                 reply_len = -1;
 439                         else
 440                                 reply_len += res;
 441                 }
 442 #endif /* CONFIG_NO_RADIUS */
 443         } else if (os_strcmp(buf, "STA-FIRST") == 0) {
 444                 reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
 445                                                          reply_size);
 446         } else if (os_strncmp(buf, "STA ", 4) == 0) {
 447                 reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
 448                                                    reply_size);
 449         } else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
 450                 reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
 451                                                         reply_size);
 452         } else if (os_strcmp(buf, "ATTACH") == 0) {
 453                 if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
 454                         reply_len = -1;
 455         } else if (os_strcmp(buf, "DETACH") == 0) {
 456                 if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
 457                         reply_len = -1;
 458         } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
 459                 if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
 460                                                     buf + 6))
 461                         reply_len = -1;
 462         } else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
 463                 if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
 464                         reply_len = -1;
 465         } else if (os_strncmp(buf, "DEAUTHENTICATE ", 15) == 0) {
 466                 if (hostapd_ctrl_iface_deauthenticate(hapd, buf + 15))
 467                         reply_len = -1;
 468         } else if (os_strncmp(buf, "DISASSOCIATE ", 13) == 0) {
 469                 if (hostapd_ctrl_iface_disassociate(hapd, buf + 13))
 470                         reply_len = -1;
 471 #ifdef CONFIG_IEEE80211W
 472 #ifdef NEED_AP_MLME
 473         } else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
 474                 if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
 475                         reply_len = -1;
 476 #endif /* NEED_AP_MLME */
 477 #endif /* CONFIG_IEEE80211W */
 478 #ifdef CONFIG_WPS
 479         } else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
 480                 if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
 481                         reply_len = -1;
 482         } else if (os_strcmp(buf, "WPS_PBC") == 0) {
 483                 if (hostapd_wps_button_pushed(hapd))
 484                         reply_len = -1;
 485 #ifdef CONFIG_WPS_OOB
 486         } else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
 487                 if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
 488                         reply_len = -1;
 489 #endif /* CONFIG_WPS_OOB */
 490         } else if (os_strncmp(buf, "WPS_AP_PIN ", 11) == 0) {
 491                 reply_len = hostapd_ctrl_iface_wps_ap_pin(hapd, buf + 11,
 492                                                           reply, reply_size);
 493 #endif /* CONFIG_WPS */
 494         } else {
 495                 os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
 496                 reply_len = 16;
 497         }
 498
 499         if (reply_len < 0) {
 500                 os_memcpy(reply, "FAIL\n", 5);
 501                 reply_len = 5;
 502         }
 503         sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
 504         os_free(reply);
 505 }
 506
 507
 508 static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
 509 {
 510         char *buf;
 511         size_t len;
 512
 513         if (hapd->conf->ctrl_interface == NULL)
 514                 return NULL;
 515
 516         len = os_strlen(hapd->conf->ctrl_interface) +
 517                 os_strlen(hapd->conf->iface) + 2;
 518         buf = os_malloc(len);
 519         if (buf == NULL)
 520                 return NULL;
 521
 522         os_snprintf(buf, len, "%s/%s",
 523                     hapd->conf->ctrl_interface, hapd->conf->iface);
 524         buf[len - 1] = '\0';
 525         return buf;
 526 }
 527
 528
 529 static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
 530                                       const char *txt, size_t len)
 531 {
 532         struct hostapd_data *hapd = ctx;
 533         if (hapd == NULL)
 534                 return;
 535         hostapd_ctrl_iface_send(hapd, level, txt, len);
 536 }
 537
 538
 539 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
 540 {
 541         struct sockaddr_un addr;
 542         int s = -1;
 543         char *fname = NULL;
 544
 545         hapd->ctrl_sock = -1;
 546
 547         if (hapd->conf->ctrl_interface == NULL)
 548                 return 0;
 549
 550         if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
 551                 if (errno == EEXIST) {
 552                         wpa_printf(MSG_DEBUG, "Using existing control "
 553                                    "interface directory.");
 554                 } else {
 555                         perror("mkdir[ctrl_interface]");
 556                         goto fail;
 557                 }
 558         }
 559
 560         if (hapd->conf->ctrl_interface_gid_set &&
 561             chown(hapd->conf->ctrl_interface, 0,
 562                   hapd->conf->ctrl_interface_gid) < 0) {
 563                 perror("chown[ctrl_interface]");
 564                 return -1;
 565         }
 566
 567         if (os_strlen(hapd->conf->ctrl_interface) + 1 +
 568             os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
 569                 goto fail;
 570
 571         s = socket(PF_UNIX, SOCK_DGRAM, 0);
 572         if (s < 0) {
 573                 perror("socket(PF_UNIX)");
 574                 goto fail;
 575         }
 576
 577         os_memset(&addr, 0, sizeof(addr));
 578 #ifdef __FreeBSD__
 579         addr.sun_len = sizeof(addr);
 580 #endif /* __FreeBSD__ */
 581         addr.sun_family = AF_UNIX;
 582         fname = hostapd_ctrl_iface_path(hapd);
 583         if (fname == NULL)
 584                 goto fail;
 585         os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
 586         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 587                 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
 588                            strerror(errno));
 589                 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 590                         wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
 591                                    " allow connections - assuming it was left"
 592                                    "over from forced program termination");
 593                         if (unlink(fname) < 0) {
 594                                 perror("unlink[ctrl_iface]");
 595                                 wpa_printf(MSG_ERROR, "Could not unlink "
 596                                            "existing ctrl_iface socket '%s'",
 597                                            fname);
 598                                 goto fail;
 599                         }
 600                         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
 601                             0) {
 602                                 perror("bind(PF_UNIX)");
 603                                 goto fail;
 604                         }
 605                         wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
 606                                    "ctrl_iface socket '%s'", fname);
 607                 } else {
 608                         wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
 609                                    "be in use - cannot override it");
 610                         wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
 611                                    "not used anymore", fname);
 612                         os_free(fname);
 613                         fname = NULL;
 614                         goto fail;
 615                 }
 616         }
 617
 618         if (hapd->conf->ctrl_interface_gid_set &&
 619             chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
 620                 perror("chown[ctrl_interface/ifname]");
 621                 goto fail;
 622         }
 623
 624         if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
 625                 perror("chmod[ctrl_interface/ifname]");
 626                 goto fail;
 627         }
 628         os_free(fname);
 629
 630         hapd->ctrl_sock = s;
 631         eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
 632                                  NULL);
 633         hapd->msg_ctx = hapd;
 634         wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
 635
 636         return 0;
 637
 638 fail:
 639         if (s >= 0)
 640                 close(s);
 641         if (fname) {
 642                 unlink(fname);
 643                 os_free(fname);
 644         }
 645         return -1;
 646 }
 647
 648
 649 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
 650 {
 651         struct wpa_ctrl_dst *dst, *prev;
 652
 653         if (hapd->ctrl_sock > -1) {
 654                 char *fname;
 655                 eloop_unregister_read_sock(hapd->ctrl_sock);
 656                 close(hapd->ctrl_sock);
 657                 hapd->ctrl_sock = -1;
 658                 fname = hostapd_ctrl_iface_path(hapd);
 659                 if (fname)
 660                         unlink(fname);
 661                 os_free(fname);
 662
 663                 if (hapd->conf->ctrl_interface &&
 664                     rmdir(hapd->conf->ctrl_interface) < 0) {
 665                         if (errno == ENOTEMPTY) {
 666                                 wpa_printf(MSG_DEBUG, "Control interface "
 667                                            "directory not empty - leaving it "
 668                                            "behind");
 669                         } else {
 670                                 perror("rmdir[ctrl_interface]");
 671                         }
 672                 }
 673         }
 674
 675         dst = hapd->ctrl_dst;
 676         while (dst) {
 677                 prev = dst;
 678                 dst = dst->next;
 679                 os_free(prev);
 680         }
 681 }
 682
 683
 684 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
 685                                     const char *buf, size_t len)
 686 {
 687         struct wpa_ctrl_dst *dst, *next;
 688         struct msghdr msg;
 689         int idx;
 690         struct iovec io[2];
 691         char levelstr[10];
 692
 693         dst = hapd->ctrl_dst;
 694         if (hapd->ctrl_sock < 0 || dst == NULL)
 695                 return;
 696
 697         os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
 698         io[0].iov_base = levelstr;
 699         io[0].iov_len = os_strlen(levelstr);
 700         io[1].iov_base = (char *) buf;
 701         io[1].iov_len = len;
 702         os_memset(&msg, 0, sizeof(msg));
 703         msg.msg_iov = io;
 704         msg.msg_iovlen = 2;
 705
 706         idx = 0;
 707         while (dst) {
 708                 next = dst->next;
 709                 if (level >= dst->debug_level) {
 710                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
 711                                     (u8 *) dst->addr.sun_path, dst->addrlen -
 712                                     offsetof(struct sockaddr_un, sun_path));
 713                         msg.msg_name = &dst->addr;
 714                         msg.msg_namelen = dst->addrlen;
 715                         if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
 716                                 int _errno = errno;
 717                                 wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
 718                                            "%d - %s",
 719                                            idx, errno, strerror(errno));
 720                                 dst->errors++;
 721                                 if (dst->errors > 10 || _errno == ENOENT) {
 722                                         hostapd_ctrl_iface_detach(
 723                                                 hapd, &dst->addr,
 724                                                 dst->addrlen);
 725                                 }
 726                         } else
 727                                 dst->errors = 0;
 728                 }
 729                 idx++;
 730                 dst = next;
 731         }
 732 }
 733
 734 #endif /* CONFIG_NATIVE_WINDOWS */