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
 279         if (pin == NULL)
 280                 return -1;
 281         *pin++ = '\0';
 282
 283         timeout_txt = os_strchr(pin, ' ');
 284         if (timeout_txt) {
 285                 *timeout_txt++ = '\0';
 286                 timeout = atoi(timeout_txt);
 287         } else
 288                 timeout = 0;
 289
 290         return hostapd_wps_add_pin(hapd, txt, pin, timeout);
 291 }
 292
 293
 294 #ifdef CONFIG_WPS_OOB
 295 static int hostapd_ctrl_iface_wps_oob(struct hostapd_data *hapd, char *txt)
 296 {
 297         char *path, *method, *name;
 298
 299         path = os_strchr(txt, ' ');
 300         if (path == NULL)
 301                 return -1;
 302         *path++ = '\0';
 303
 304         method = os_strchr(path, ' ');
 305         if (method == NULL)
 306                 return -1;
 307         *method++ = '\0';
 308
 309         name = os_strchr(method, ' ');
 310         if (name != NULL)
 311                 *name++ = '\0';
 312
 313         return hostapd_wps_start_oob(hapd, txt, path, method, name);
 314 }
 315 #endif /* CONFIG_WPS_OOB */
 316 #endif /* CONFIG_WPS */
 317
 318
 319 static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
 320                                        void *sock_ctx)
 321 {
 322         struct hostapd_data *hapd = eloop_ctx;
 323         char buf[256];
 324         int res;
 325         struct sockaddr_un from;
 326         socklen_t fromlen = sizeof(from);
 327         char *reply;
 328         const int reply_size = 4096;
 329         int reply_len;
 330
 331         res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
 332                        (struct sockaddr *) &from, &fromlen);
 333         if (res < 0) {
 334                 perror("recvfrom(ctrl_iface)");
 335                 return;
 336         }
 337         buf[res] = '\0';
 338         wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
 339
 340         reply = os_malloc(reply_size);
 341         if (reply == NULL) {
 342                 sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
 343                        fromlen);
 344                 return;
 345         }
 346
 347         os_memcpy(reply, "OK\n", 3);
 348         reply_len = 3;
 349
 350         if (os_strcmp(buf, "PING") == 0) {
 351                 os_memcpy(reply, "PONG\n", 5);
 352                 reply_len = 5;
 353         } else if (os_strcmp(buf, "MIB") == 0) {
 354                 reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
 355                 if (reply_len >= 0) {
 356                         res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
 357                                           reply_size - reply_len);
 358                         if (res < 0)
 359                                 reply_len = -1;
 360                         else
 361                                 reply_len += res;
 362                 }
 363                 if (reply_len >= 0) {
 364                         res = ieee802_1x_get_mib(hapd, reply + reply_len,
 365                                                  reply_size - reply_len);
 366                         if (res < 0)
 367                                 reply_len = -1;
 368                         else
 369                                 reply_len += res;
 370                 }
 371 #ifndef CONFIG_NO_RADIUS
 372                 if (reply_len >= 0) {
 373                         res = radius_client_get_mib(hapd->radius,
 374                                                     reply + reply_len,
 375                                                     reply_size - reply_len);
 376                         if (res < 0)
 377                                 reply_len = -1;
 378                         else
 379                                 reply_len += res;
 380                 }
 381 #endif /* CONFIG_NO_RADIUS */
 382         } else if (os_strcmp(buf, "STA-FIRST") == 0) {
 383                 reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
 384                                                          reply_size);
 385         } else if (os_strncmp(buf, "STA ", 4) == 0) {
 386                 reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
 387                                                    reply_size);
 388         } else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
 389                 reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
 390                                                         reply_size);
 391         } else if (os_strcmp(buf, "ATTACH") == 0) {
 392                 if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
 393                         reply_len = -1;
 394         } else if (os_strcmp(buf, "DETACH") == 0) {
 395                 if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
 396                         reply_len = -1;
 397         } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
 398                 if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
 399                                                     buf + 6))
 400                         reply_len = -1;
 401         } else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
 402                 if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
 403                         reply_len = -1;
 404         } else if (os_strncmp(buf, "DEAUTHENTICATE ", 15) == 0) {
 405                 if (hostapd_ctrl_iface_deauthenticate(hapd, buf + 15))
 406                         reply_len = -1;
 407         } else if (os_strncmp(buf, "DISASSOCIATE ", 13) == 0) {
 408                 if (hostapd_ctrl_iface_disassociate(hapd, buf + 13))
 409                         reply_len = -1;
 410 #ifdef CONFIG_IEEE80211W
 411 #ifdef NEED_AP_MLME
 412         } else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
 413                 if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
 414                         reply_len = -1;
 415 #endif /* NEED_AP_MLME */
 416 #endif /* CONFIG_IEEE80211W */
 417 #ifdef CONFIG_WPS
 418         } else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
 419                 if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
 420                         reply_len = -1;
 421         } else if (os_strcmp(buf, "WPS_PBC") == 0) {
 422                 if (hostapd_wps_button_pushed(hapd))
 423                         reply_len = -1;
 424 #ifdef CONFIG_WPS_OOB
 425         } else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
 426                 if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
 427                         reply_len = -1;
 428 #endif /* CONFIG_WPS_OOB */
 429 #endif /* CONFIG_WPS */
 430         } else {
 431                 os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
 432                 reply_len = 16;
 433         }
 434
 435         if (reply_len < 0) {
 436                 os_memcpy(reply, "FAIL\n", 5);
 437                 reply_len = 5;
 438         }
 439         sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
 440         os_free(reply);
 441 }
 442
 443
 444 static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
 445 {
 446         char *buf;
 447         size_t len;
 448
 449         if (hapd->conf->ctrl_interface == NULL)
 450                 return NULL;
 451
 452         len = os_strlen(hapd->conf->ctrl_interface) +
 453                 os_strlen(hapd->conf->iface) + 2;
 454         buf = os_malloc(len);
 455         if (buf == NULL)
 456                 return NULL;
 457
 458         os_snprintf(buf, len, "%s/%s",
 459                     hapd->conf->ctrl_interface, hapd->conf->iface);
 460         buf[len - 1] = '\0';
 461         return buf;
 462 }
 463
 464
 465 static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
 466                                       const char *txt, size_t len)
 467 {
 468         struct hostapd_data *hapd = ctx;
 469         if (hapd == NULL)
 470                 return;
 471         hostapd_ctrl_iface_send(hapd, level, txt, len);
 472 }
 473
 474
 475 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
 476 {
 477         struct sockaddr_un addr;
 478         int s = -1;
 479         char *fname = NULL;
 480
 481         hapd->ctrl_sock = -1;
 482
 483         if (hapd->conf->ctrl_interface == NULL)
 484                 return 0;
 485
 486         if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
 487                 if (errno == EEXIST) {
 488                         wpa_printf(MSG_DEBUG, "Using existing control "
 489                                    "interface directory.");
 490                 } else {
 491                         perror("mkdir[ctrl_interface]");
 492                         goto fail;
 493                 }
 494         }
 495
 496         if (hapd->conf->ctrl_interface_gid_set &&
 497             chown(hapd->conf->ctrl_interface, 0,
 498                   hapd->conf->ctrl_interface_gid) < 0) {
 499                 perror("chown[ctrl_interface]");
 500                 return -1;
 501         }
 502
 503         if (os_strlen(hapd->conf->ctrl_interface) + 1 +
 504             os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
 505                 goto fail;
 506
 507         s = socket(PF_UNIX, SOCK_DGRAM, 0);
 508         if (s < 0) {
 509                 perror("socket(PF_UNIX)");
 510                 goto fail;
 511         }
 512
 513         os_memset(&addr, 0, sizeof(addr));
 514 #ifdef __FreeBSD__
 515         addr.sun_len = sizeof(addr);
 516 #endif /* __FreeBSD__ */
 517         addr.sun_family = AF_UNIX;
 518         fname = hostapd_ctrl_iface_path(hapd);
 519         if (fname == NULL)
 520                 goto fail;
 521         os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
 522         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 523                 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
 524                            strerror(errno));
 525                 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 526                         wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
 527                                    " allow connections - assuming it was left"
 528                                    "over from forced program termination");
 529                         if (unlink(fname) < 0) {
 530                                 perror("unlink[ctrl_iface]");
 531                                 wpa_printf(MSG_ERROR, "Could not unlink "
 532                                            "existing ctrl_iface socket '%s'",
 533                                            fname);
 534                                 goto fail;
 535                         }
 536                         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
 537                             0) {
 538                                 perror("bind(PF_UNIX)");
 539                                 goto fail;
 540                         }
 541                         wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
 542                                    "ctrl_iface socket '%s'", fname);
 543                 } else {
 544                         wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
 545                                    "be in use - cannot override it");
 546                         wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
 547                                    "not used anymore", fname);
 548                         os_free(fname);
 549                         fname = NULL;
 550                         goto fail;
 551                 }
 552         }
 553
 554         if (hapd->conf->ctrl_interface_gid_set &&
 555             chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
 556                 perror("chown[ctrl_interface/ifname]");
 557                 goto fail;
 558         }
 559
 560         if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
 561                 perror("chmod[ctrl_interface/ifname]");
 562                 goto fail;
 563         }
 564         os_free(fname);
 565
 566         hapd->ctrl_sock = s;
 567         eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
 568                                  NULL);
 569         hapd->msg_ctx = hapd;
 570         wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
 571
 572         return 0;
 573
 574 fail:
 575         if (s >= 0)
 576                 close(s);
 577         if (fname) {
 578                 unlink(fname);
 579                 os_free(fname);
 580         }
 581         return -1;
 582 }
 583
 584
 585 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
 586 {
 587         struct wpa_ctrl_dst *dst, *prev;
 588
 589         if (hapd->ctrl_sock > -1) {
 590                 char *fname;
 591                 eloop_unregister_read_sock(hapd->ctrl_sock);
 592                 close(hapd->ctrl_sock);
 593                 hapd->ctrl_sock = -1;
 594                 fname = hostapd_ctrl_iface_path(hapd);
 595                 if (fname)
 596                         unlink(fname);
 597                 os_free(fname);
 598
 599                 if (hapd->conf->ctrl_interface &&
 600                     rmdir(hapd->conf->ctrl_interface) < 0) {
 601                         if (errno == ENOTEMPTY) {
 602                                 wpa_printf(MSG_DEBUG, "Control interface "
 603                                            "directory not empty - leaving it "
 604                                            "behind");
 605                         } else {
 606                                 perror("rmdir[ctrl_interface]");
 607                         }
 608                 }
 609         }
 610
 611         dst = hapd->ctrl_dst;
 612         while (dst) {
 613                 prev = dst;
 614                 dst = dst->next;
 615                 os_free(prev);
 616         }
 617 }
 618
 619
 620 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
 621                                     const char *buf, size_t len)
 622 {
 623         struct wpa_ctrl_dst *dst, *next;
 624         struct msghdr msg;
 625         int idx;
 626         struct iovec io[2];
 627         char levelstr[10];
 628
 629         dst = hapd->ctrl_dst;
 630         if (hapd->ctrl_sock < 0 || dst == NULL)
 631                 return;
 632
 633         os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
 634         io[0].iov_base = levelstr;
 635         io[0].iov_len = os_strlen(levelstr);
 636         io[1].iov_base = (char *) buf;
 637         io[1].iov_len = len;
 638         os_memset(&msg, 0, sizeof(msg));
 639         msg.msg_iov = io;
 640         msg.msg_iovlen = 2;
 641
 642         idx = 0;
 643         while (dst) {
 644                 next = dst->next;
 645                 if (level >= dst->debug_level) {
 646                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
 647                                     (u8 *) dst->addr.sun_path, dst->addrlen -
 648                                     offsetof(struct sockaddr_un, sun_path));
 649                         msg.msg_name = &dst->addr;
 650                         msg.msg_namelen = dst->addrlen;
 651                         if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
 652                                 int _errno = errno;
 653                                 wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
 654                                            "%d - %s",
 655                                            idx, errno, strerror(errno));
 656                                 dst->errors++;
 657                                 if (dst->errors > 10 || _errno == ENOENT) {
 658                                         hostapd_ctrl_iface_detach(
 659                                                 hapd, &dst->addr,
 660                                                 dst->addrlen);
 661                                 }
 662                         } else
 663                                 dst->errors = 0;
 664                 }
 665                 idx++;
 666                 dst = next;
 667         }
 668 }
 669
 670 #endif /* CONFIG_NATIVE_WINDOWS */