hostapd/ctrl_iface.c

   1 /*
   2  * hostapd / UNIX domain socket -based control interface
   3  * Copyright (c) 2004-2008, 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 "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 "hostapd.h"
  24 #include "eloop.h"
  25 #include "config.h"
  26 #include "ieee802_1x.h"
  27 #include "wpa.h"
  28 #include "radius/radius_client.h"
  29 #include "ieee802_11.h"
  30 #include "ctrl_iface.h"
  31 #include "sta_info.h"
  32 #include "accounting.h"
  33 #include "wps_hostapd.h"
  34 #include "drivers/driver.h"
  35
  36
  37 struct wpa_ctrl_dst {
  38         struct wpa_ctrl_dst *next;
  39         struct sockaddr_un addr;
  40         socklen_t addrlen;
  41         int debug_level;
  42         int errors;
  43 };
  44
  45
  46 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
  47                                     const char *buf, size_t len);
  48
  49
  50 static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
  51                                      struct sockaddr_un *from,
  52                                      socklen_t fromlen)
  53 {
  54         struct wpa_ctrl_dst *dst;
  55
  56         dst = os_zalloc(sizeof(*dst));
  57         if (dst == NULL)
  58                 return -1;
  59         os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
  60         dst->addrlen = fromlen;
  61         dst->debug_level = MSG_INFO;
  62         dst->next = hapd->ctrl_dst;
  63         hapd->ctrl_dst = dst;
  64         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
  65                     (u8 *) from->sun_path,
  66                     fromlen - offsetof(struct sockaddr_un, sun_path));
  67         return 0;
  68 }
  69
  70
  71 static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
  72                                      struct sockaddr_un *from,
  73                                      socklen_t fromlen)
  74 {
  75         struct wpa_ctrl_dst *dst, *prev = NULL;
  76
  77         dst = hapd->ctrl_dst;
  78         while (dst) {
  79                 if (fromlen == dst->addrlen &&
  80                     os_memcmp(from->sun_path, dst->addr.sun_path,
  81                               fromlen - offsetof(struct sockaddr_un, sun_path))
  82                     == 0) {
  83                         if (prev == NULL)
  84                                 hapd->ctrl_dst = dst->next;
  85                         else
  86                                 prev->next = dst->next;
  87                         os_free(dst);
  88                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
  89                                     (u8 *) from->sun_path,
  90                                     fromlen -
  91                                     offsetof(struct sockaddr_un, sun_path));
  92                         return 0;
  93                 }
  94                 prev = dst;
  95                 dst = dst->next;
  96         }
  97         return -1;
  98 }
  99
 100
 101 static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
 102                                     struct sockaddr_un *from,
 103                                     socklen_t fromlen,
 104                                     char *level)
 105 {
 106         struct wpa_ctrl_dst *dst;
 107
 108         wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
 109
 110         dst = hapd->ctrl_dst;
 111         while (dst) {
 112                 if (fromlen == dst->addrlen &&
 113                     os_memcmp(from->sun_path, dst->addr.sun_path,
 114                               fromlen - offsetof(struct sockaddr_un, sun_path))
 115                     == 0) {
 116                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
 117                                     "level", (u8 *) from->sun_path, fromlen -
 118                                     offsetof(struct sockaddr_un, sun_path));
 119                         dst->debug_level = atoi(level);
 120                         return 0;
 121                 }
 122                 dst = dst->next;
 123         }
 124
 125         return -1;
 126 }
 127
 128
 129 static int hostapd_ctrl_iface_sta_mib(struct hostapd_data *hapd,
 130                                       struct sta_info *sta,
 131                                       char *buf, size_t buflen)
 132 {
 133         int len, res, ret;
 134
 135         if (sta == NULL) {
 136                 ret = os_snprintf(buf, buflen, "FAIL\n");
 137                 if (ret < 0 || (size_t) ret >= buflen)
 138                         return 0;
 139                 return ret;
 140         }
 141
 142         len = 0;
 143         ret = os_snprintf(buf + len, buflen - len, MACSTR "\n",
 144                           MAC2STR(sta->addr));
 145         if (ret < 0 || (size_t) ret >= buflen - len)
 146                 return len;
 147         len += ret;
 148
 149         res = ieee802_11_get_mib_sta(hapd, sta, buf + len, buflen - len);
 150         if (res >= 0)
 151                 len += res;
 152         res = wpa_get_mib_sta(sta->wpa_sm, buf + len, buflen - len);
 153         if (res >= 0)
 154                 len += res;
 155         res = ieee802_1x_get_mib_sta(hapd, sta, buf + len, buflen - len);
 156         if (res >= 0)
 157                 len += res;
 158         res = hostapd_wps_get_mib_sta(hapd, sta->addr, buf + len,
 159                                       buflen - len);
 160         if (res >= 0)
 161                 len += res;
 162
 163         return len;
 164 }
 165
 166
 167 static int hostapd_ctrl_iface_sta_first(struct hostapd_data *hapd,
 168                                         char *buf, size_t buflen)
 169 {
 170         return hostapd_ctrl_iface_sta_mib(hapd, hapd->sta_list, buf, buflen);
 171 }
 172
 173
 174 static int hostapd_ctrl_iface_sta(struct hostapd_data *hapd,
 175                                   const char *txtaddr,
 176                                   char *buf, size_t buflen)
 177 {
 178         u8 addr[ETH_ALEN];
 179         int ret;
 180
 181         if (hwaddr_aton(txtaddr, addr)) {
 182                 ret = os_snprintf(buf, buflen, "FAIL\n");
 183                 if (ret < 0 || (size_t) ret >= buflen)
 184                         return 0;
 185                 return ret;
 186         }
 187         return hostapd_ctrl_iface_sta_mib(hapd, ap_get_sta(hapd, addr),
 188                                           buf, buflen);
 189 }
 190
 191
 192 static int hostapd_ctrl_iface_sta_next(struct hostapd_data *hapd,
 193                                        const char *txtaddr,
 194                                        char *buf, size_t buflen)
 195 {
 196         u8 addr[ETH_ALEN];
 197         struct sta_info *sta;
 198         int ret;
 199
 200         if (hwaddr_aton(txtaddr, addr) ||
 201             (sta = ap_get_sta(hapd, addr)) == NULL) {
 202                 ret = os_snprintf(buf, buflen, "FAIL\n");
 203                 if (ret < 0 || (size_t) ret >= buflen)
 204                         return 0;
 205                 return ret;
 206         }
 207         return hostapd_ctrl_iface_sta_mib(hapd, sta->next, buf, buflen);
 208 }
 209
 210
 211 static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
 212                                       const char *txtaddr)
 213 {
 214         u8 addr[ETH_ALEN];
 215         struct sta_info *sta;
 216
 217         wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
 218
 219         if (hwaddr_aton(txtaddr, addr))
 220                 return -1;
 221
 222         sta = ap_get_sta(hapd, addr);
 223         if (sta)
 224                 return 0;
 225
 226         wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
 227                    "notification", MAC2STR(addr));
 228         sta = ap_sta_add(hapd, addr);
 229         if (sta == NULL)
 230                 return -1;
 231
 232         hostapd_new_assoc_sta(hapd, sta, 0);
 233         return 0;
 234 }
 235
 236
 237 #ifdef CONFIG_IEEE80211W
 238 #ifdef NEED_AP_MLME
 239 static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
 240                                        const char *txtaddr)
 241 {
 242         u8 addr[ETH_ALEN];
 243         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 244
 245         wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
 246
 247         if (hwaddr_aton(txtaddr, addr))
 248                 return -1;
 249
 250         os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
 251         ieee802_11_send_sa_query_req(hapd, addr, trans_id);
 252
 253         return 0;
 254 }
 255 #endif /* NEED_AP_MLME */
 256 #endif /* CONFIG_IEEE80211W */
 257
 258
 259 #ifdef CONFIG_WPS
 260 static int hostapd_ctrl_iface_wps_pin(struct hostapd_data *hapd, char *txt)
 261 {
 262         char *pin = os_strchr(txt, ' ');
 263         char *timeout_txt;
 264         int timeout;
 265
 266         if (pin == NULL)
 267                 return -1;
 268         *pin++ = '\0';
 269
 270         timeout_txt = os_strchr(pin, ' ');
 271         if (timeout_txt) {
 272                 *timeout_txt++ = '\0';
 273                 timeout = atoi(timeout_txt);
 274         } else
 275                 timeout = 0;
 276
 277         return hostapd_wps_add_pin(hapd, txt, pin, timeout);
 278 }
 279
 280
 281 #ifdef CONFIG_WPS_OOB
 282 static int hostapd_ctrl_iface_wps_oob(struct hostapd_data *hapd, char *txt)
 283 {
 284         char *path, *method, *name;
 285
 286         path = os_strchr(txt, ' ');
 287         if (path == NULL)
 288                 return -1;
 289         *path++ = '\0';
 290
 291         method = os_strchr(path, ' ');
 292         if (method == NULL)
 293                 return -1;
 294         *method++ = '\0';
 295
 296         name = os_strchr(method, ' ');
 297         if (name != NULL)
 298                 *name++ = '\0';
 299
 300         return hostapd_wps_start_oob(hapd, txt, path, method, name);
 301 }
 302 #endif /* CONFIG_WPS_OOB */
 303 #endif /* CONFIG_WPS */
 304
 305
 306 static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
 307                                        void *sock_ctx)
 308 {
 309         struct hostapd_data *hapd = eloop_ctx;
 310         char buf[256];
 311         int res;
 312         struct sockaddr_un from;
 313         socklen_t fromlen = sizeof(from);
 314         char *reply;
 315         const int reply_size = 4096;
 316         int reply_len;
 317
 318         res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
 319                        (struct sockaddr *) &from, &fromlen);
 320         if (res < 0) {
 321                 perror("recvfrom(ctrl_iface)");
 322                 return;
 323         }
 324         buf[res] = '\0';
 325         wpa_hexdump_ascii(MSG_DEBUG, "RX ctrl_iface", (u8 *) buf, res);
 326
 327         reply = os_malloc(reply_size);
 328         if (reply == NULL) {
 329                 sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
 330                        fromlen);
 331                 return;
 332         }
 333
 334         os_memcpy(reply, "OK\n", 3);
 335         reply_len = 3;
 336
 337         if (os_strcmp(buf, "PING") == 0) {
 338                 os_memcpy(reply, "PONG\n", 5);
 339                 reply_len = 5;
 340         } else if (os_strcmp(buf, "MIB") == 0) {
 341                 reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
 342                 if (reply_len >= 0) {
 343                         res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
 344                                           reply_size - reply_len);
 345                         if (res < 0)
 346                                 reply_len = -1;
 347                         else
 348                                 reply_len += res;
 349                 }
 350                 if (reply_len >= 0) {
 351                         res = ieee802_1x_get_mib(hapd, reply + reply_len,
 352                                                  reply_size - reply_len);
 353                         if (res < 0)
 354                                 reply_len = -1;
 355                         else
 356                                 reply_len += res;
 357                 }
 358                 if (reply_len >= 0) {
 359                         res = radius_client_get_mib(hapd->radius,
 360                                                     reply + reply_len,
 361                                                     reply_size - reply_len);
 362                         if (res < 0)
 363                                 reply_len = -1;
 364                         else
 365                                 reply_len += res;
 366                 }
 367         } else if (os_strcmp(buf, "STA-FIRST") == 0) {
 368                 reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
 369                                                          reply_size);
 370         } else if (os_strncmp(buf, "STA ", 4) == 0) {
 371                 reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
 372                                                    reply_size);
 373         } else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
 374                 reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
 375                                                         reply_size);
 376         } else if (os_strcmp(buf, "ATTACH") == 0) {
 377                 if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
 378                         reply_len = -1;
 379         } else if (os_strcmp(buf, "DETACH") == 0) {
 380                 if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
 381                         reply_len = -1;
 382         } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
 383                 if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
 384                                                     buf + 6))
 385                         reply_len = -1;
 386         } else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
 387                 if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
 388                         reply_len = -1;
 389 #ifdef CONFIG_IEEE80211W
 390 #ifdef NEED_AP_MLME
 391         } else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
 392                 if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
 393                         reply_len = -1;
 394 #endif /* NEED_AP_MLME */
 395 #endif /* CONFIG_IEEE80211W */
 396 #ifdef CONFIG_WPS
 397         } else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
 398                 if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
 399                         reply_len = -1;
 400         } else if (os_strcmp(buf, "WPS_PBC") == 0) {
 401                 if (hostapd_wps_button_pushed(hapd))
 402                         reply_len = -1;
 403 #ifdef CONFIG_WPS_OOB
 404         } else if (os_strncmp(buf, "WPS_OOB ", 8) == 0) {
 405                 if (hostapd_ctrl_iface_wps_oob(hapd, buf + 8))
 406                         reply_len = -1;
 407 #endif /* CONFIG_WPS_OOB */
 408 #endif /* CONFIG_WPS */
 409         } else {
 410                 os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
 411                 reply_len = 16;
 412         }
 413
 414         if (reply_len < 0) {
 415                 os_memcpy(reply, "FAIL\n", 5);
 416                 reply_len = 5;
 417         }
 418         sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
 419         os_free(reply);
 420 }
 421
 422
 423 static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
 424 {
 425         char *buf;
 426         size_t len;
 427
 428         if (hapd->conf->ctrl_interface == NULL)
 429                 return NULL;
 430
 431         len = os_strlen(hapd->conf->ctrl_interface) +
 432                 os_strlen(hapd->conf->iface) + 2;
 433         buf = os_malloc(len);
 434         if (buf == NULL)
 435                 return NULL;
 436
 437         os_snprintf(buf, len, "%s/%s",
 438                     hapd->conf->ctrl_interface, hapd->conf->iface);
 439         buf[len - 1] = '\0';
 440         return buf;
 441 }
 442
 443
 444 static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
 445                                       const char *txt, size_t len)
 446 {
 447         struct hostapd_data *hapd = ctx;
 448         if (hapd == NULL)
 449                 return;
 450         hostapd_ctrl_iface_send(hapd, level, txt, len);
 451 }
 452
 453
 454 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
 455 {
 456         struct sockaddr_un addr;
 457         int s = -1;
 458         char *fname = NULL;
 459
 460         hapd->ctrl_sock = -1;
 461
 462         if (hapd->conf->ctrl_interface == NULL)
 463                 return 0;
 464
 465         if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
 466                 if (errno == EEXIST) {
 467                         wpa_printf(MSG_DEBUG, "Using existing control "
 468                                    "interface directory.");
 469                 } else {
 470                         perror("mkdir[ctrl_interface]");
 471                         goto fail;
 472                 }
 473         }
 474
 475         if (hapd->conf->ctrl_interface_gid_set &&
 476             chown(hapd->conf->ctrl_interface, 0,
 477                   hapd->conf->ctrl_interface_gid) < 0) {
 478                 perror("chown[ctrl_interface]");
 479                 return -1;
 480         }
 481
 482         if (os_strlen(hapd->conf->ctrl_interface) + 1 +
 483             os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
 484                 goto fail;
 485
 486         s = socket(PF_UNIX, SOCK_DGRAM, 0);
 487         if (s < 0) {
 488                 perror("socket(PF_UNIX)");
 489                 goto fail;
 490         }
 491
 492         os_memset(&addr, 0, sizeof(addr));
 493 #ifdef __FreeBSD__
 494         addr.sun_len = sizeof(addr);
 495 #endif /* __FreeBSD__ */
 496         addr.sun_family = AF_UNIX;
 497         fname = hostapd_ctrl_iface_path(hapd);
 498         if (fname == NULL)
 499                 goto fail;
 500         os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
 501         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 502                 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
 503                            strerror(errno));
 504                 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
 505                         wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
 506                                    " allow connections - assuming it was left"
 507                                    "over from forced program termination");
 508                         if (unlink(fname) < 0) {
 509                                 perror("unlink[ctrl_iface]");
 510                                 wpa_printf(MSG_ERROR, "Could not unlink "
 511                                            "existing ctrl_iface socket '%s'",
 512                                            fname);
 513                                 goto fail;
 514                         }
 515                         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
 516                             0) {
 517                                 perror("bind(PF_UNIX)");
 518                                 goto fail;
 519                         }
 520                         wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
 521                                    "ctrl_iface socket '%s'", fname);
 522                 } else {
 523                         wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
 524                                    "be in use - cannot override it");
 525                         wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
 526                                    "not used anymore", fname);
 527                         os_free(fname);
 528                         fname = NULL;
 529                         goto fail;
 530                 }
 531         }
 532
 533         if (hapd->conf->ctrl_interface_gid_set &&
 534             chown(fname, 0, hapd->conf->ctrl_interface_gid) < 0) {
 535                 perror("chown[ctrl_interface/ifname]");
 536                 goto fail;
 537         }
 538
 539         if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
 540                 perror("chmod[ctrl_interface/ifname]");
 541                 goto fail;
 542         }
 543         os_free(fname);
 544
 545         hapd->ctrl_sock = s;
 546         eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
 547                                  NULL);
 548         wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
 549
 550         return 0;
 551
 552 fail:
 553         if (s >= 0)
 554                 close(s);
 555         if (fname) {
 556                 unlink(fname);
 557                 os_free(fname);
 558         }
 559         return -1;
 560 }
 561
 562
 563 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
 564 {
 565         struct wpa_ctrl_dst *dst, *prev;
 566
 567         if (hapd->ctrl_sock > -1) {
 568                 char *fname;
 569                 eloop_unregister_read_sock(hapd->ctrl_sock);
 570                 close(hapd->ctrl_sock);
 571                 hapd->ctrl_sock = -1;
 572                 fname = hostapd_ctrl_iface_path(hapd);
 573                 if (fname)
 574                         unlink(fname);
 575                 os_free(fname);
 576
 577                 if (hapd->conf->ctrl_interface &&
 578                     rmdir(hapd->conf->ctrl_interface) < 0) {
 579                         if (errno == ENOTEMPTY) {
 580                                 wpa_printf(MSG_DEBUG, "Control interface "
 581                                            "directory not empty - leaving it "
 582                                            "behind");
 583                         } else {
 584                                 perror("rmdir[ctrl_interface]");
 585                         }
 586                 }
 587         }
 588
 589         dst = hapd->ctrl_dst;
 590         while (dst) {
 591                 prev = dst;
 592                 dst = dst->next;
 593                 os_free(prev);
 594         }
 595 }
 596
 597
 598 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
 599                                     const char *buf, size_t len)
 600 {
 601         struct wpa_ctrl_dst *dst, *next;
 602         struct msghdr msg;
 603         int idx;
 604         struct iovec io[2];
 605         char levelstr[10];
 606
 607         dst = hapd->ctrl_dst;
 608         if (hapd->ctrl_sock < 0 || dst == NULL)
 609                 return;
 610
 611         os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
 612         io[0].iov_base = levelstr;
 613         io[0].iov_len = os_strlen(levelstr);
 614         io[1].iov_base = (char *) buf;
 615         io[1].iov_len = len;
 616         os_memset(&msg, 0, sizeof(msg));
 617         msg.msg_iov = io;
 618         msg.msg_iovlen = 2;
 619
 620         idx = 0;
 621         while (dst) {
 622                 next = dst->next;
 623                 if (level >= dst->debug_level) {
 624                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
 625                                     (u8 *) dst->addr.sun_path, dst->addrlen -
 626                                     offsetof(struct sockaddr_un, sun_path));
 627                         msg.msg_name = &dst->addr;
 628                         msg.msg_namelen = dst->addrlen;
 629                         if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
 630                                 int _errno = errno;
 631                                 wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
 632                                            "%d - %s",
 633                                            idx, errno, strerror(errno));
 634                                 dst->errors++;
 635                                 if (dst->errors > 10 || _errno == ENOENT) {
 636                                         hostapd_ctrl_iface_detach(
 637                                                 hapd, &dst->addr,
 638                                                 dst->addrlen);
 639                                 }
 640                         } else
 641                                 dst->errors = 0;
 642                 }
 643                 idx++;
 644                 dst = next;
 645         }
 646 }
 647
 648 #endif /* CONFIG_NATIVE_WINDOWS */