hostapd/ctrl_iface.c

   1 /*
   2  * hostapd / UNIX domain socket -based control interface
   3  * Copyright (c) 2004-2012, 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 "utils/includes.h"
  10
  11 #ifndef CONFIG_NATIVE_WINDOWS
  12
  13 #include <sys/un.h>
  14 #include <sys/stat.h>
  15 #include <stddef.h>
  16
  17 #include "utils/common.h"
  18 #include "utils/eloop.h"
  19 #include "common/version.h"
  20 #include "common/ieee802_11_defs.h"
  21 #include "drivers/driver.h"
  22 #include "radius/radius_client.h"
  23 #include "ap/hostapd.h"
  24 #include "ap/ap_config.h"
  25 #include "ap/ieee802_1x.h"
  26 #include "ap/wpa_auth.h"
  27 #include "ap/ieee802_11.h"
  28 #include "ap/sta_info.h"
  29 #include "ap/wps_hostapd.h"
  30 #include "ap/ctrl_iface_ap.h"
  31 #include "ap/ap_drv_ops.h"
  32 #include "wps/wps_defs.h"
  33 #include "wps/wps.h"
  34 #include "config_file.h"
  35 #include "ctrl_iface.h"
  36
  37
  38 struct wpa_ctrl_dst {
  39         struct wpa_ctrl_dst *next;
  40         struct sockaddr_un addr;
  41         socklen_t addrlen;
  42         int debug_level;
  43         int errors;
  44 };
  45
  46
  47 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
  48                                     const char *buf, size_t len);
  49
  50
  51 static int hostapd_ctrl_iface_attach(struct hostapd_data *hapd,
  52                                      struct sockaddr_un *from,
  53                                      socklen_t fromlen)
  54 {
  55         struct wpa_ctrl_dst *dst;
  56
  57         dst = os_zalloc(sizeof(*dst));
  58         if (dst == NULL)
  59                 return -1;
  60         os_memcpy(&dst->addr, from, sizeof(struct sockaddr_un));
  61         dst->addrlen = fromlen;
  62         dst->debug_level = MSG_INFO;
  63         dst->next = hapd->ctrl_dst;
  64         hapd->ctrl_dst = dst;
  65         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor attached",
  66                     (u8 *) from->sun_path,
  67                     fromlen - offsetof(struct sockaddr_un, sun_path));
  68         return 0;
  69 }
  70
  71
  72 static int hostapd_ctrl_iface_detach(struct hostapd_data *hapd,
  73                                      struct sockaddr_un *from,
  74                                      socklen_t fromlen)
  75 {
  76         struct wpa_ctrl_dst *dst, *prev = NULL;
  77
  78         dst = hapd->ctrl_dst;
  79         while (dst) {
  80                 if (fromlen == dst->addrlen &&
  81                     os_memcmp(from->sun_path, dst->addr.sun_path,
  82                               fromlen - offsetof(struct sockaddr_un, sun_path))
  83                     == 0) {
  84                         if (prev == NULL)
  85                                 hapd->ctrl_dst = dst->next;
  86                         else
  87                                 prev->next = dst->next;
  88                         os_free(dst);
  89                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor detached",
  90                                     (u8 *) from->sun_path,
  91                                     fromlen -
  92                                     offsetof(struct sockaddr_un, sun_path));
  93                         return 0;
  94                 }
  95                 prev = dst;
  96                 dst = dst->next;
  97         }
  98         return -1;
  99 }
 100
 101
 102 static int hostapd_ctrl_iface_level(struct hostapd_data *hapd,
 103                                     struct sockaddr_un *from,
 104                                     socklen_t fromlen,
 105                                     char *level)
 106 {
 107         struct wpa_ctrl_dst *dst;
 108
 109         wpa_printf(MSG_DEBUG, "CTRL_IFACE LEVEL %s", level);
 110
 111         dst = hapd->ctrl_dst;
 112         while (dst) {
 113                 if (fromlen == dst->addrlen &&
 114                     os_memcmp(from->sun_path, dst->addr.sun_path,
 115                               fromlen - offsetof(struct sockaddr_un, sun_path))
 116                     == 0) {
 117                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE changed monitor "
 118                                     "level", (u8 *) from->sun_path, fromlen -
 119                                     offsetof(struct sockaddr_un, sun_path));
 120                         dst->debug_level = atoi(level);
 121                         return 0;
 122                 }
 123                 dst = dst->next;
 124         }
 125
 126         return -1;
 127 }
 128
 129
 130 static int hostapd_ctrl_iface_new_sta(struct hostapd_data *hapd,
 131                                       const char *txtaddr)
 132 {
 133         u8 addr[ETH_ALEN];
 134         struct sta_info *sta;
 135
 136         wpa_printf(MSG_DEBUG, "CTRL_IFACE NEW_STA %s", txtaddr);
 137
 138         if (hwaddr_aton(txtaddr, addr))
 139                 return -1;
 140
 141         sta = ap_get_sta(hapd, addr);
 142         if (sta)
 143                 return 0;
 144
 145         wpa_printf(MSG_DEBUG, "Add new STA " MACSTR " based on ctrl_iface "
 146                    "notification", MAC2STR(addr));
 147         sta = ap_sta_add(hapd, addr);
 148         if (sta == NULL)
 149                 return -1;
 150
 151         hostapd_new_assoc_sta(hapd, sta, 0);
 152         return 0;
 153 }
 154
 155
 156 #ifdef CONFIG_IEEE80211W
 157 #ifdef NEED_AP_MLME
 158 static int hostapd_ctrl_iface_sa_query(struct hostapd_data *hapd,
 159                                        const char *txtaddr)
 160 {
 161         u8 addr[ETH_ALEN];
 162         u8 trans_id[WLAN_SA_QUERY_TR_ID_LEN];
 163
 164         wpa_printf(MSG_DEBUG, "CTRL_IFACE SA_QUERY %s", txtaddr);
 165
 166         if (hwaddr_aton(txtaddr, addr) ||
 167             os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0)
 168                 return -1;
 169
 170         ieee802_11_send_sa_query_req(hapd, addr, trans_id);
 171
 172         return 0;
 173 }
 174 #endif /* NEED_AP_MLME */
 175 #endif /* CONFIG_IEEE80211W */
 176
 177
 178 #ifdef CONFIG_WPS
 179 static int hostapd_ctrl_iface_wps_pin(struct hostapd_data *hapd, char *txt)
 180 {
 181         char *pin = os_strchr(txt, ' ');
 182         char *timeout_txt;
 183         int timeout;
 184         u8 addr_buf[ETH_ALEN], *addr = NULL;
 185         char *pos;
 186
 187         if (pin == NULL)
 188                 return -1;
 189         *pin++ = '\0';
 190
 191         timeout_txt = os_strchr(pin, ' ');
 192         if (timeout_txt) {
 193                 *timeout_txt++ = '\0';
 194                 timeout = atoi(timeout_txt);
 195                 pos = os_strchr(timeout_txt, ' ');
 196                 if (pos) {
 197                         *pos++ = '\0';
 198                         if (hwaddr_aton(pos, addr_buf) == 0)
 199                                 addr = addr_buf;
 200                 }
 201         } else
 202                 timeout = 0;
 203
 204         return hostapd_wps_add_pin(hapd, addr, txt, pin, timeout);
 205 }
 206
 207
 208 static int hostapd_ctrl_iface_wps_check_pin(
 209         struct hostapd_data *hapd, char *cmd, char *buf, size_t buflen)
 210 {
 211         char pin[9];
 212         size_t len;
 213         char *pos;
 214         int ret;
 215
 216         wpa_hexdump_ascii_key(MSG_DEBUG, "WPS_CHECK_PIN",
 217                               (u8 *) cmd, os_strlen(cmd));
 218         for (pos = cmd, len = 0; *pos != '\0'; pos++) {
 219                 if (*pos < '0' || *pos > '9')
 220                         continue;
 221                 pin[len++] = *pos;
 222                 if (len == 9) {
 223                         wpa_printf(MSG_DEBUG, "WPS: Too long PIN");
 224                         return -1;
 225                 }
 226         }
 227         if (len != 4 && len != 8) {
 228                 wpa_printf(MSG_DEBUG, "WPS: Invalid PIN length %d", (int) len);
 229                 return -1;
 230         }
 231         pin[len] = '\0';
 232
 233         if (len == 8) {
 234                 unsigned int pin_val;
 235                 pin_val = atoi(pin);
 236                 if (!wps_pin_valid(pin_val)) {
 237                         wpa_printf(MSG_DEBUG, "WPS: Invalid checksum digit");
 238                         ret = os_snprintf(buf, buflen, "FAIL-CHECKSUM\n");
 239                         if (ret < 0 || (size_t) ret >= buflen)
 240                                 return -1;
 241                         return ret;
 242                 }
 243         }
 244
 245         ret = os_snprintf(buf, buflen, "%s", pin);
 246         if (ret < 0 || (size_t) ret >= buflen)
 247                 return -1;
 248
 249         return ret;
 250 }
 251
 252
 253 #ifdef CONFIG_WPS_NFC
 254 static int hostapd_ctrl_iface_wps_nfc_tag_read(struct hostapd_data *hapd,
 255                                                char *pos)
 256 {
 257         size_t len;
 258         struct wpabuf *buf;
 259         int ret;
 260
 261         len = os_strlen(pos);
 262         if (len & 0x01)
 263                 return -1;
 264         len /= 2;
 265
 266         buf = wpabuf_alloc(len);
 267         if (buf == NULL)
 268                 return -1;
 269         if (hexstr2bin(pos, wpabuf_put(buf, len), len) < 0) {
 270                 wpabuf_free(buf);
 271                 return -1;
 272         }
 273
 274         ret = hostapd_wps_nfc_tag_read(hapd, buf);
 275         wpabuf_free(buf);
 276
 277         return ret;
 278 }
 279
 280
 281 static int hostapd_ctrl_iface_wps_nfc_config_token(struct hostapd_data *hapd,
 282                                                    char *cmd, char *reply,
 283                                                    size_t max_len)
 284 {
 285         int ndef;
 286         struct wpabuf *buf;
 287         int res;
 288
 289         if (os_strcmp(cmd, "WPS") == 0)
 290                 ndef = 0;
 291         else if (os_strcmp(cmd, "NDEF") == 0)
 292                 ndef = 1;
 293         else
 294                 return -1;
 295
 296         buf = hostapd_wps_nfc_config_token(hapd, ndef);
 297         if (buf == NULL)
 298                 return -1;
 299
 300         res = wpa_snprintf_hex_uppercase(reply, max_len, wpabuf_head(buf),
 301                                          wpabuf_len(buf));
 302         reply[res++] = '\n';
 303         reply[res] = '\0';
 304
 305         wpabuf_free(buf);
 306
 307         return res;
 308 }
 309
 310
 311 static int hostapd_ctrl_iface_wps_nfc_token_gen(struct hostapd_data *hapd,
 312                                                 char *reply, size_t max_len,
 313                                                 int ndef)
 314 {
 315         struct wpabuf *buf;
 316         int res;
 317
 318         buf = hostapd_wps_nfc_token_gen(hapd, ndef);
 319         if (buf == NULL)
 320                 return -1;
 321
 322         res = wpa_snprintf_hex_uppercase(reply, max_len, wpabuf_head(buf),
 323                                          wpabuf_len(buf));
 324         reply[res++] = '\n';
 325         reply[res] = '\0';
 326
 327         wpabuf_free(buf);
 328
 329         return res;
 330 }
 331
 332
 333 static int hostapd_ctrl_iface_wps_nfc_token(struct hostapd_data *hapd,
 334                                             char *cmd, char *reply,
 335                                             size_t max_len)
 336 {
 337         if (os_strcmp(cmd, "WPS") == 0)
 338                 return hostapd_ctrl_iface_wps_nfc_token_gen(hapd, reply,
 339                                                             max_len, 0);
 340
 341         if (os_strcmp(cmd, "NDEF") == 0)
 342                 return hostapd_ctrl_iface_wps_nfc_token_gen(hapd, reply,
 343                                                             max_len, 1);
 344
 345         if (os_strcmp(cmd, "enable") == 0)
 346                 return hostapd_wps_nfc_token_enable(hapd);
 347
 348         if (os_strcmp(cmd, "disable") == 0) {
 349                 hostapd_wps_nfc_token_disable(hapd);
 350                 return 0;
 351         }
 352
 353         return -1;
 354 }
 355 #endif /* CONFIG_WPS_NFC */
 356
 357
 358 static int hostapd_ctrl_iface_wps_ap_pin(struct hostapd_data *hapd, char *txt,
 359                                          char *buf, size_t buflen)
 360 {
 361         int timeout = 300;
 362         char *pos;
 363         const char *pin_txt;
 364
 365         pos = os_strchr(txt, ' ');
 366         if (pos)
 367                 *pos++ = '\0';
 368
 369         if (os_strcmp(txt, "disable") == 0) {
 370                 hostapd_wps_ap_pin_disable(hapd);
 371                 return os_snprintf(buf, buflen, "OK\n");
 372         }
 373
 374         if (os_strcmp(txt, "random") == 0) {
 375                 if (pos)
 376                         timeout = atoi(pos);
 377                 pin_txt = hostapd_wps_ap_pin_random(hapd, timeout);
 378                 if (pin_txt == NULL)
 379                         return -1;
 380                 return os_snprintf(buf, buflen, "%s", pin_txt);
 381         }
 382
 383         if (os_strcmp(txt, "get") == 0) {
 384                 pin_txt = hostapd_wps_ap_pin_get(hapd);
 385                 if (pin_txt == NULL)
 386                         return -1;
 387                 return os_snprintf(buf, buflen, "%s", pin_txt);
 388         }
 389
 390         if (os_strcmp(txt, "set") == 0) {
 391                 char *pin;
 392                 if (pos == NULL)
 393                         return -1;
 394                 pin = pos;
 395                 pos = os_strchr(pos, ' ');
 396                 if (pos) {
 397                         *pos++ = '\0';
 398                         timeout = atoi(pos);
 399                 }
 400                 if (os_strlen(pin) > buflen)
 401                         return -1;
 402                 if (hostapd_wps_ap_pin_set(hapd, pin, timeout) < 0)
 403                         return -1;
 404                 return os_snprintf(buf, buflen, "%s", pin);
 405         }
 406
 407         return -1;
 408 }
 409
 410
 411 static int hostapd_ctrl_iface_wps_config(struct hostapd_data *hapd, char *txt)
 412 {
 413         char *pos;
 414         char *ssid, *auth, *encr = NULL, *key = NULL;
 415
 416         ssid = txt;
 417         pos = os_strchr(txt, ' ');
 418         if (!pos)
 419                 return -1;
 420         *pos++ = '\0';
 421
 422         auth = pos;
 423         pos = os_strchr(pos, ' ');
 424         if (pos) {
 425                 *pos++ = '\0';
 426                 encr = pos;
 427                 pos = os_strchr(pos, ' ');
 428                 if (pos) {
 429                         *pos++ = '\0';
 430                         key = pos;
 431                 }
 432         }
 433
 434         return hostapd_wps_config_ap(hapd, ssid, auth, encr, key);
 435 }
 436 #endif /* CONFIG_WPS */
 437
 438
 439 #ifdef CONFIG_WNM
 440
 441 static int hostapd_ctrl_iface_disassoc_imminent(struct hostapd_data *hapd,
 442                                                 const char *cmd)
 443 {
 444         u8 addr[ETH_ALEN];
 445         u8 buf[1000], *pos;
 446         struct ieee80211_mgmt *mgmt;
 447         int disassoc_timer;
 448
 449         if (hwaddr_aton(cmd, addr))
 450                 return -1;
 451         if (cmd[17] != ' ')
 452                 return -1;
 453         disassoc_timer = atoi(cmd + 17);
 454
 455         os_memset(buf, 0, sizeof(buf));
 456         mgmt = (struct ieee80211_mgmt *) buf;
 457         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 458                                            WLAN_FC_STYPE_ACTION);
 459         os_memcpy(mgmt->da, addr, ETH_ALEN);
 460         os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
 461         os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
 462         mgmt->u.action.category = WLAN_ACTION_WNM;
 463         mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
 464         mgmt->u.action.u.bss_tm_req.dialog_token = 1;
 465         mgmt->u.action.u.bss_tm_req.req_mode =
 466                 WNM_BSS_TM_REQ_DISASSOC_IMMINENT;
 467         mgmt->u.action.u.bss_tm_req.disassoc_timer =
 468                 host_to_le16(disassoc_timer);
 469         mgmt->u.action.u.bss_tm_req.validity_interval = 0;
 470
 471         pos = mgmt->u.action.u.bss_tm_req.variable;
 472
 473         if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) {
 474                 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
 475                            "Management Request frame");
 476                 return -1;
 477         }
 478
 479         return 0;
 480 }
 481
 482
 483 static int hostapd_ctrl_iface_ess_disassoc(struct hostapd_data *hapd,
 484                                            const char *cmd)
 485 {
 486         u8 addr[ETH_ALEN];
 487         const char *url;
 488         u8 buf[1000], *pos;
 489         struct ieee80211_mgmt *mgmt;
 490         size_t url_len;
 491
 492         if (hwaddr_aton(cmd, addr))
 493                 return -1;
 494         url = cmd + 17;
 495         if (*url != ' ')
 496                 return -1;
 497         url++;
 498         url_len = os_strlen(url);
 499         if (url_len > 255)
 500                 return -1;
 501
 502         os_memset(buf, 0, sizeof(buf));
 503         mgmt = (struct ieee80211_mgmt *) buf;
 504         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 505                                            WLAN_FC_STYPE_ACTION);
 506         os_memcpy(mgmt->da, addr, ETH_ALEN);
 507         os_memcpy(mgmt->sa, hapd->own_addr, ETH_ALEN);
 508         os_memcpy(mgmt->bssid, hapd->own_addr, ETH_ALEN);
 509         mgmt->u.action.category = WLAN_ACTION_WNM;
 510         mgmt->u.action.u.bss_tm_req.action = WNM_BSS_TRANS_MGMT_REQ;
 511         mgmt->u.action.u.bss_tm_req.dialog_token = 1;
 512         mgmt->u.action.u.bss_tm_req.req_mode =
 513                 WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT;
 514         mgmt->u.action.u.bss_tm_req.disassoc_timer = host_to_le16(0);
 515         mgmt->u.action.u.bss_tm_req.validity_interval = 0;
 516
 517         pos = mgmt->u.action.u.bss_tm_req.variable;
 518
 519         /* Session Information URL */
 520         *pos++ = url_len;
 521         os_memcpy(pos, url, url_len);
 522         pos += url_len;
 523
 524         if (hostapd_drv_send_mlme(hapd, buf, pos - buf, 0) < 0) {
 525                 wpa_printf(MSG_DEBUG, "Failed to send BSS Transition "
 526                            "Management Request frame");
 527                 return -1;
 528         }
 529
 530         return 0;
 531 }
 532
 533 #endif /* CONFIG_WNM */
 534
 535
 536 static int hostapd_ctrl_iface_get_config(struct hostapd_data *hapd,
 537                                          char *buf, size_t buflen)
 538 {
 539         int ret;
 540         char *pos, *end;
 541
 542         pos = buf;
 543         end = buf + buflen;
 544
 545         ret = os_snprintf(pos, end - pos, "bssid=" MACSTR "\n"
 546                           "ssid=%s\n",
 547                           MAC2STR(hapd->own_addr),
 548                           wpa_ssid_txt(hapd->conf->ssid.ssid,
 549                                        hapd->conf->ssid.ssid_len));
 550         if (ret < 0 || ret >= end - pos)
 551                 return pos - buf;
 552         pos += ret;
 553
 554 #ifdef CONFIG_WPS
 555         ret = os_snprintf(pos, end - pos, "wps_state=%s\n",
 556                           hapd->conf->wps_state == 0 ? "disabled" :
 557                           (hapd->conf->wps_state == 1 ? "not configured" :
 558                            "configured"));
 559         if (ret < 0 || ret >= end - pos)
 560                 return pos - buf;
 561         pos += ret;
 562
 563         if (hapd->conf->wps_state && hapd->conf->wpa &&
 564             hapd->conf->ssid.wpa_passphrase) {
 565                 ret = os_snprintf(pos, end - pos, "passphrase=%s\n",
 566                                   hapd->conf->ssid.wpa_passphrase);
 567                 if (ret < 0 || ret >= end - pos)
 568                         return pos - buf;
 569                 pos += ret;
 570         }
 571
 572         if (hapd->conf->wps_state && hapd->conf->wpa &&
 573             hapd->conf->ssid.wpa_psk &&
 574             hapd->conf->ssid.wpa_psk->group) {
 575                 char hex[PMK_LEN * 2 + 1];
 576                 wpa_snprintf_hex(hex, sizeof(hex),
 577                                  hapd->conf->ssid.wpa_psk->psk, PMK_LEN);
 578                 ret = os_snprintf(pos, end - pos, "psk=%s\n", hex);
 579                 if (ret < 0 || ret >= end - pos)
 580                         return pos - buf;
 581                 pos += ret;
 582         }
 583 #endif /* CONFIG_WPS */
 584
 585         if (hapd->conf->wpa && hapd->conf->wpa_key_mgmt) {
 586                 ret = os_snprintf(pos, end - pos, "key_mgmt=");
 587                 if (ret < 0 || ret >= end - pos)
 588                         return pos - buf;
 589                 pos += ret;
 590
 591                 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK) {
 592                         ret = os_snprintf(pos, end - pos, "WPA-PSK ");
 593                         if (ret < 0 || ret >= end - pos)
 594                                 return pos - buf;
 595                         pos += ret;
 596                 }
 597                 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
 598                         ret = os_snprintf(pos, end - pos, "WPA-EAP ");
 599                         if (ret < 0 || ret >= end - pos)
 600                                 return pos - buf;
 601                         pos += ret;
 602                 }
 603 #ifdef CONFIG_IEEE80211R
 604                 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_PSK) {
 605                         ret = os_snprintf(pos, end - pos, "FT-PSK ");
 606                         if (ret < 0 || ret >= end - pos)
 607                                 return pos - buf;
 608                         pos += ret;
 609                 }
 610                 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X) {
 611                         ret = os_snprintf(pos, end - pos, "FT-EAP ");
 612                         if (ret < 0 || ret >= end - pos)
 613                                 return pos - buf;
 614                         pos += ret;
 615                 }
 616 #endif /* CONFIG_IEEE80211R */
 617 #ifdef CONFIG_IEEE80211W
 618                 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK_SHA256) {
 619                         ret = os_snprintf(pos, end - pos, "WPA-PSK-SHA256 ");
 620                         if (ret < 0 || ret >= end - pos)
 621                                 return pos - buf;
 622                         pos += ret;
 623                 }
 624                 if (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256) {
 625                         ret = os_snprintf(pos, end - pos, "WPA-EAP-SHA256 ");
 626                         if (ret < 0 || ret >= end - pos)
 627                                 return pos - buf;
 628                         pos += ret;
 629                 }
 630 #endif /* CONFIG_IEEE80211W */
 631
 632                 ret = os_snprintf(pos, end - pos, "\n");
 633                 if (ret < 0 || ret >= end - pos)
 634                         return pos - buf;
 635                 pos += ret;
 636         }
 637
 638         if (hapd->conf->wpa) {
 639                 ret = os_snprintf(pos, end - pos, "group_cipher=%s\n",
 640                                   wpa_cipher_txt(hapd->conf->wpa_group));
 641                 if (ret < 0 || ret >= end - pos)
 642                         return pos - buf;
 643                 pos += ret;
 644         }
 645
 646         if ((hapd->conf->wpa & WPA_PROTO_RSN) && hapd->conf->rsn_pairwise) {
 647                 ret = os_snprintf(pos, end - pos, "rsn_pairwise_cipher=");
 648                 if (ret < 0 || ret >= end - pos)
 649                         return pos - buf;
 650                 pos += ret;
 651
 652                 ret = wpa_write_ciphers(pos, end, hapd->conf->rsn_pairwise,
 653                                         " ");
 654                 if (ret < 0)
 655                         return pos - buf;
 656                 pos += ret;
 657
 658                 ret = os_snprintf(pos, end - pos, "\n");
 659                 if (ret < 0 || ret >= end - pos)
 660                         return pos - buf;
 661                 pos += ret;
 662         }
 663
 664         if ((hapd->conf->wpa & WPA_PROTO_WPA) && hapd->conf->wpa_pairwise) {
 665                 ret = os_snprintf(pos, end - pos, "wpa_pairwise_cipher=");
 666                 if (ret < 0 || ret >= end - pos)
 667                         return pos - buf;
 668                 pos += ret;
 669
 670                 ret = wpa_write_ciphers(pos, end, hapd->conf->rsn_pairwise,
 671                                         " ");
 672                 if (ret < 0)
 673                         return pos - buf;
 674                 pos += ret;
 675
 676                 ret = os_snprintf(pos, end - pos, "\n");
 677                 if (ret < 0 || ret >= end - pos)
 678                         return pos - buf;
 679                 pos += ret;
 680         }
 681
 682         return pos - buf;
 683 }
 684
 685
 686 static int hostapd_ctrl_iface_set(struct hostapd_data *hapd, char *cmd)
 687 {
 688         char *value;
 689         int ret = 0;
 690
 691         value = os_strchr(cmd, ' ');
 692         if (value == NULL)
 693                 return -1;
 694         *value++ = '\0';
 695
 696         wpa_printf(MSG_DEBUG, "CTRL_IFACE SET '%s'='%s'", cmd, value);
 697         if (0) {
 698 #ifdef CONFIG_WPS_TESTING
 699         } else if (os_strcasecmp(cmd, "wps_version_number") == 0) {
 700                 long int val;
 701                 val = strtol(value, NULL, 0);
 702                 if (val < 0 || val > 0xff) {
 703                         ret = -1;
 704                         wpa_printf(MSG_DEBUG, "WPS: Invalid "
 705                                    "wps_version_number %ld", val);
 706                 } else {
 707                         wps_version_number = val;
 708                         wpa_printf(MSG_DEBUG, "WPS: Testing - force WPS "
 709                                    "version %u.%u",
 710                                    (wps_version_number & 0xf0) >> 4,
 711                                    wps_version_number & 0x0f);
 712                         hostapd_wps_update_ie(hapd);
 713                 }
 714         } else if (os_strcasecmp(cmd, "wps_testing_dummy_cred") == 0) {
 715                 wps_testing_dummy_cred = atoi(value);
 716                 wpa_printf(MSG_DEBUG, "WPS: Testing - dummy_cred=%d",
 717                            wps_testing_dummy_cred);
 718 #endif /* CONFIG_WPS_TESTING */
 719 #ifdef CONFIG_INTERWORKING
 720         } else if (os_strcasecmp(cmd, "gas_frag_limit") == 0) {
 721                 int val = atoi(value);
 722                 if (val <= 0)
 723                         ret = -1;
 724                 else
 725                         hapd->gas_frag_limit = val;
 726 #endif /* CONFIG_INTERWORKING */
 727         } else {
 728                 ret = hostapd_set_iface(hapd->iconf, hapd->conf, cmd, value);
 729         }
 730
 731         return ret;
 732 }
 733
 734
 735 static int hostapd_ctrl_iface_get(struct hostapd_data *hapd, char *cmd,
 736                                   char *buf, size_t buflen)
 737 {
 738         int res;
 739
 740         wpa_printf(MSG_DEBUG, "CTRL_IFACE GET '%s'", cmd);
 741
 742         if (os_strcmp(cmd, "version") == 0) {
 743                 res = os_snprintf(buf, buflen, "%s", VERSION_STR);
 744                 if (res < 0 || (unsigned int) res >= buflen)
 745                         return -1;
 746                 return res;
 747         }
 748
 749         return -1;
 750 }
 751
 752
 753 static int hostapd_ctrl_iface_enable(struct hostapd_iface *iface)
 754 {
 755         if (hostapd_enable_iface(iface) < 0) {
 756                 wpa_printf(MSG_ERROR, "Enabling of interface failed");
 757                 return -1;
 758         }
 759         return 0;
 760 }
 761
 762
 763 static int hostapd_ctrl_iface_reload(struct hostapd_iface *iface)
 764 {
 765         if (hostapd_reload_iface(iface) < 0) {
 766                 wpa_printf(MSG_ERROR, "Reloading of interface failed");
 767                 return -1;
 768         }
 769         return 0;
 770 }
 771
 772
 773 static int hostapd_ctrl_iface_disable(struct hostapd_iface *iface)
 774 {
 775         if (hostapd_disable_iface(iface) < 0) {
 776                 wpa_printf(MSG_ERROR, "Disabling of interface failed");
 777                 return -1;
 778         }
 779         return 0;
 780 }
 781
 782
 783 static void hostapd_ctrl_iface_receive(int sock, void *eloop_ctx,
 784                                        void *sock_ctx)
 785 {
 786         struct hostapd_data *hapd = eloop_ctx;
 787         char buf[256];
 788         int res;
 789         struct sockaddr_un from;
 790         socklen_t fromlen = sizeof(from);
 791         char *reply;
 792         const int reply_size = 4096;
 793         int reply_len;
 794         int level = MSG_DEBUG;
 795
 796         res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
 797                        (struct sockaddr *) &from, &fromlen);
 798         if (res < 0) {
 799                 perror("recvfrom(ctrl_iface)");
 800                 return;
 801         }
 802         buf[res] = '\0';
 803         if (os_strcmp(buf, "PING") == 0)
 804                 level = MSG_EXCESSIVE;
 805         wpa_hexdump_ascii(level, "RX ctrl_iface", (u8 *) buf, res);
 806
 807         reply = os_malloc(reply_size);
 808         if (reply == NULL) {
 809                 sendto(sock, "FAIL\n", 5, 0, (struct sockaddr *) &from,
 810                        fromlen);
 811                 return;
 812         }
 813
 814         os_memcpy(reply, "OK\n", 3);
 815         reply_len = 3;
 816
 817         if (os_strcmp(buf, "PING") == 0) {
 818                 os_memcpy(reply, "PONG\n", 5);
 819                 reply_len = 5;
 820         } else if (os_strncmp(buf, "RELOG", 5) == 0) {
 821                 if (wpa_debug_reopen_file() < 0)
 822                         reply_len = -1;
 823         } else if (os_strcmp(buf, "MIB") == 0) {
 824                 reply_len = ieee802_11_get_mib(hapd, reply, reply_size);
 825                 if (reply_len >= 0) {
 826                         res = wpa_get_mib(hapd->wpa_auth, reply + reply_len,
 827                                           reply_size - reply_len);
 828                         if (res < 0)
 829                                 reply_len = -1;
 830                         else
 831                                 reply_len += res;
 832                 }
 833                 if (reply_len >= 0) {
 834                         res = ieee802_1x_get_mib(hapd, reply + reply_len,
 835                                                  reply_size - reply_len);
 836                         if (res < 0)
 837                                 reply_len = -1;
 838                         else
 839                                 reply_len += res;
 840                 }
 841 #ifndef CONFIG_NO_RADIUS
 842                 if (reply_len >= 0) {
 843                         res = radius_client_get_mib(hapd->radius,
 844                                                     reply + reply_len,
 845                                                     reply_size - reply_len);
 846                         if (res < 0)
 847                                 reply_len = -1;
 848                         else
 849                                 reply_len += res;
 850                 }
 851 #endif /* CONFIG_NO_RADIUS */
 852         } else if (os_strcmp(buf, "STA-FIRST") == 0) {
 853                 reply_len = hostapd_ctrl_iface_sta_first(hapd, reply,
 854                                                          reply_size);
 855         } else if (os_strncmp(buf, "STA ", 4) == 0) {
 856                 reply_len = hostapd_ctrl_iface_sta(hapd, buf + 4, reply,
 857                                                    reply_size);
 858         } else if (os_strncmp(buf, "STA-NEXT ", 9) == 0) {
 859                 reply_len = hostapd_ctrl_iface_sta_next(hapd, buf + 9, reply,
 860                                                         reply_size);
 861         } else if (os_strcmp(buf, "ATTACH") == 0) {
 862                 if (hostapd_ctrl_iface_attach(hapd, &from, fromlen))
 863                         reply_len = -1;
 864         } else if (os_strcmp(buf, "DETACH") == 0) {
 865                 if (hostapd_ctrl_iface_detach(hapd, &from, fromlen))
 866                         reply_len = -1;
 867         } else if (os_strncmp(buf, "LEVEL ", 6) == 0) {
 868                 if (hostapd_ctrl_iface_level(hapd, &from, fromlen,
 869                                                     buf + 6))
 870                         reply_len = -1;
 871         } else if (os_strncmp(buf, "NEW_STA ", 8) == 0) {
 872                 if (hostapd_ctrl_iface_new_sta(hapd, buf + 8))
 873                         reply_len = -1;
 874         } else if (os_strncmp(buf, "DEAUTHENTICATE ", 15) == 0) {
 875                 if (hostapd_ctrl_iface_deauthenticate(hapd, buf + 15))
 876                         reply_len = -1;
 877         } else if (os_strncmp(buf, "DISASSOCIATE ", 13) == 0) {
 878                 if (hostapd_ctrl_iface_disassociate(hapd, buf + 13))
 879                         reply_len = -1;
 880 #ifdef CONFIG_IEEE80211W
 881 #ifdef NEED_AP_MLME
 882         } else if (os_strncmp(buf, "SA_QUERY ", 9) == 0) {
 883                 if (hostapd_ctrl_iface_sa_query(hapd, buf + 9))
 884                         reply_len = -1;
 885 #endif /* NEED_AP_MLME */
 886 #endif /* CONFIG_IEEE80211W */
 887 #ifdef CONFIG_WPS
 888         } else if (os_strncmp(buf, "WPS_PIN ", 8) == 0) {
 889                 if (hostapd_ctrl_iface_wps_pin(hapd, buf + 8))
 890                         reply_len = -1;
 891         } else if (os_strncmp(buf, "WPS_CHECK_PIN ", 14) == 0) {
 892                 reply_len = hostapd_ctrl_iface_wps_check_pin(
 893                         hapd, buf + 14, reply, reply_size);
 894         } else if (os_strcmp(buf, "WPS_PBC") == 0) {
 895                 if (hostapd_wps_button_pushed(hapd, NULL))
 896                         reply_len = -1;
 897         } else if (os_strcmp(buf, "WPS_CANCEL") == 0) {
 898                 if (hostapd_wps_cancel(hapd))
 899                         reply_len = -1;
 900         } else if (os_strncmp(buf, "WPS_AP_PIN ", 11) == 0) {
 901                 reply_len = hostapd_ctrl_iface_wps_ap_pin(hapd, buf + 11,
 902                                                           reply, reply_size);
 903         } else if (os_strncmp(buf, "WPS_CONFIG ", 11) == 0) {
 904                 if (hostapd_ctrl_iface_wps_config(hapd, buf + 11) < 0)
 905                         reply_len = -1;
 906 #ifdef CONFIG_WPS_NFC
 907         } else if (os_strncmp(buf, "WPS_NFC_TAG_READ ", 17) == 0) {
 908                 if (hostapd_ctrl_iface_wps_nfc_tag_read(hapd, buf + 17))
 909                         reply_len = -1;
 910         } else if (os_strncmp(buf, "WPS_NFC_CONFIG_TOKEN ", 21) == 0) {
 911                 reply_len = hostapd_ctrl_iface_wps_nfc_config_token(
 912                         hapd, buf + 21, reply, reply_size);
 913         } else if (os_strncmp(buf, "WPS_NFC_TOKEN ", 14) == 0) {
 914                 reply_len = hostapd_ctrl_iface_wps_nfc_token(
 915                         hapd, buf + 14, reply, reply_size);
 916 #endif /* CONFIG_WPS_NFC */
 917 #endif /* CONFIG_WPS */
 918 #ifdef CONFIG_WNM
 919         } else if (os_strncmp(buf, "DISASSOC_IMMINENT ", 18) == 0) {
 920                 if (hostapd_ctrl_iface_disassoc_imminent(hapd, buf + 18))
 921                         reply_len = -1;
 922         } else if (os_strncmp(buf, "ESS_DISASSOC ", 13) == 0) {
 923                 if (hostapd_ctrl_iface_ess_disassoc(hapd, buf + 13))
 924                         reply_len = -1;
 925 #endif /* CONFIG_WNM */
 926         } else if (os_strcmp(buf, "GET_CONFIG") == 0) {
 927                 reply_len = hostapd_ctrl_iface_get_config(hapd, reply,
 928                                                           reply_size);
 929         } else if (os_strncmp(buf, "SET ", 4) == 0) {
 930                 if (hostapd_ctrl_iface_set(hapd, buf + 4))
 931                         reply_len = -1;
 932         } else if (os_strncmp(buf, "GET ", 4) == 0) {
 933                 reply_len = hostapd_ctrl_iface_get(hapd, buf + 4, reply,
 934                                                    reply_size);
 935         } else if (os_strncmp(buf, "ENABLE", 6) == 0) {
 936                 if (hostapd_ctrl_iface_enable(hapd->iface))
 937                         reply_len = -1;
 938         } else if (os_strncmp(buf, "RELOAD", 6) == 0) {
 939                 if (hostapd_ctrl_iface_reload(hapd->iface))
 940                         reply_len = -1;
 941         } else if (os_strncmp(buf, "DISABLE", 7) == 0) {
 942                 if (hostapd_ctrl_iface_disable(hapd->iface))
 943                         reply_len = -1;
 944         } else {
 945                 os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
 946                 reply_len = 16;
 947         }
 948
 949         if (reply_len < 0) {
 950                 os_memcpy(reply, "FAIL\n", 5);
 951                 reply_len = 5;
 952         }
 953         sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
 954         os_free(reply);
 955 }
 956
 957
 958 static char * hostapd_ctrl_iface_path(struct hostapd_data *hapd)
 959 {
 960         char *buf;
 961         size_t len;
 962
 963         if (hapd->conf->ctrl_interface == NULL)
 964                 return NULL;
 965
 966         len = os_strlen(hapd->conf->ctrl_interface) +
 967                 os_strlen(hapd->conf->iface) + 2;
 968         buf = os_malloc(len);
 969         if (buf == NULL)
 970                 return NULL;
 971
 972         os_snprintf(buf, len, "%s/%s",
 973                     hapd->conf->ctrl_interface, hapd->conf->iface);
 974         buf[len - 1] = '\0';
 975         return buf;
 976 }
 977
 978
 979 static void hostapd_ctrl_iface_msg_cb(void *ctx, int level,
 980                                       const char *txt, size_t len)
 981 {
 982         struct hostapd_data *hapd = ctx;
 983         if (hapd == NULL)
 984                 return;
 985         hostapd_ctrl_iface_send(hapd, level, txt, len);
 986 }
 987
 988
 989 int hostapd_ctrl_iface_init(struct hostapd_data *hapd)
 990 {
 991         struct sockaddr_un addr;
 992         int s = -1;
 993         char *fname = NULL;
 994
 995         if (hapd->ctrl_sock > -1) {
 996                 wpa_printf(MSG_DEBUG, "ctrl_iface already exists!");
 997                 return 0;
 998         }
 999
1000         if (hapd->conf->ctrl_interface == NULL)
1001                 return 0;
1002
1003         if (mkdir(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
1004                 if (errno == EEXIST) {
1005                         wpa_printf(MSG_DEBUG, "Using existing control "
1006                                    "interface directory.");
1007                 } else {
1008                         perror("mkdir[ctrl_interface]");
1009                         goto fail;
1010                 }
1011         }
1012
1013         if (hapd->conf->ctrl_interface_gid_set &&
1014             chown(hapd->conf->ctrl_interface, -1,
1015                   hapd->conf->ctrl_interface_gid) < 0) {
1016                 perror("chown[ctrl_interface]");
1017                 return -1;
1018         }
1019
1020 #ifdef ANDROID
1021         /*
1022          * Android is using umask 0077 which would leave the control interface
1023          * directory without group access. This breaks things since Wi-Fi
1024          * framework assumes that this directory can be accessed by other
1025          * applications in the wifi group. Fix this by adding group access even
1026          * if umask value would prevent this.
1027          */
1028         if (chmod(hapd->conf->ctrl_interface, S_IRWXU | S_IRWXG) < 0) {
1029                 wpa_printf(MSG_ERROR, "CTRL: Could not chmod directory: %s",
1030                            strerror(errno));
1031                 /* Try to continue anyway */
1032         }
1033 #endif /* ANDROID */
1034
1035         if (os_strlen(hapd->conf->ctrl_interface) + 1 +
1036             os_strlen(hapd->conf->iface) >= sizeof(addr.sun_path))
1037                 goto fail;
1038
1039         s = socket(PF_UNIX, SOCK_DGRAM, 0);
1040         if (s < 0) {
1041                 perror("socket(PF_UNIX)");
1042                 goto fail;
1043         }
1044
1045         os_memset(&addr, 0, sizeof(addr));
1046 #ifdef __FreeBSD__
1047         addr.sun_len = sizeof(addr);
1048 #endif /* __FreeBSD__ */
1049         addr.sun_family = AF_UNIX;
1050         fname = hostapd_ctrl_iface_path(hapd);
1051         if (fname == NULL)
1052                 goto fail;
1053         os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
1054         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1055                 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
1056                            strerror(errno));
1057                 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1058                         wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
1059                                    " allow connections - assuming it was left"
1060                                    "over from forced program termination");
1061                         if (unlink(fname) < 0) {
1062                                 perror("unlink[ctrl_iface]");
1063                                 wpa_printf(MSG_ERROR, "Could not unlink "
1064                                            "existing ctrl_iface socket '%s'",
1065                                            fname);
1066                                 goto fail;
1067                         }
1068                         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
1069                             0) {
1070                                 perror("hostapd-ctrl-iface: bind(PF_UNIX)");
1071                                 goto fail;
1072                         }
1073                         wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
1074                                    "ctrl_iface socket '%s'", fname);
1075                 } else {
1076                         wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
1077                                    "be in use - cannot override it");
1078                         wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
1079                                    "not used anymore", fname);
1080                         os_free(fname);
1081                         fname = NULL;
1082                         goto fail;
1083                 }
1084         }
1085
1086         if (hapd->conf->ctrl_interface_gid_set &&
1087             chown(fname, -1, hapd->conf->ctrl_interface_gid) < 0) {
1088                 perror("chown[ctrl_interface/ifname]");
1089                 goto fail;
1090         }
1091
1092         if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
1093                 perror("chmod[ctrl_interface/ifname]");
1094                 goto fail;
1095         }
1096         os_free(fname);
1097
1098         hapd->ctrl_sock = s;
1099         eloop_register_read_sock(s, hostapd_ctrl_iface_receive, hapd,
1100                                  NULL);
1101         hapd->msg_ctx = hapd;
1102         wpa_msg_register_cb(hostapd_ctrl_iface_msg_cb);
1103
1104         return 0;
1105
1106 fail:
1107         if (s >= 0)
1108                 close(s);
1109         if (fname) {
1110                 unlink(fname);
1111                 os_free(fname);
1112         }
1113         return -1;
1114 }
1115
1116
1117 void hostapd_ctrl_iface_deinit(struct hostapd_data *hapd)
1118 {
1119         struct wpa_ctrl_dst *dst, *prev;
1120
1121         if (hapd->ctrl_sock > -1) {
1122                 char *fname;
1123                 eloop_unregister_read_sock(hapd->ctrl_sock);
1124                 close(hapd->ctrl_sock);
1125                 hapd->ctrl_sock = -1;
1126                 fname = hostapd_ctrl_iface_path(hapd);
1127                 if (fname)
1128                         unlink(fname);
1129                 os_free(fname);
1130
1131                 if (hapd->conf->ctrl_interface &&
1132                     rmdir(hapd->conf->ctrl_interface) < 0) {
1133                         if (errno == ENOTEMPTY) {
1134                                 wpa_printf(MSG_DEBUG, "Control interface "
1135                                            "directory not empty - leaving it "
1136                                            "behind");
1137                         } else {
1138                                 perror("rmdir[ctrl_interface]");
1139                         }
1140                 }
1141         }
1142
1143         dst = hapd->ctrl_dst;
1144         while (dst) {
1145                 prev = dst;
1146                 dst = dst->next;
1147                 os_free(prev);
1148         }
1149 }
1150
1151
1152 static int hostapd_ctrl_iface_add(struct hapd_interfaces *interfaces,
1153                                   char *buf)
1154 {
1155         if (hostapd_add_iface(interfaces, buf) < 0) {
1156                 wpa_printf(MSG_ERROR, "Adding interface %s failed", buf);
1157                 return -1;
1158         }
1159         return 0;
1160 }
1161
1162
1163 static int hostapd_ctrl_iface_remove(struct hapd_interfaces *interfaces,
1164                                      char *buf)
1165 {
1166         if (hostapd_remove_iface(interfaces, buf) < 0) {
1167                 wpa_printf(MSG_ERROR, "Removing interface %s failed", buf);
1168                 return -1;
1169         }
1170         return 0;
1171 }
1172
1173
1174 static void hostapd_global_ctrl_iface_receive(int sock, void *eloop_ctx,
1175                                               void *sock_ctx)
1176 {
1177         void *interfaces = eloop_ctx;
1178         char buf[256];
1179         int res;
1180         struct sockaddr_un from;
1181         socklen_t fromlen = sizeof(from);
1182         char reply[24];
1183         int reply_len;
1184
1185         res = recvfrom(sock, buf, sizeof(buf) - 1, 0,
1186                        (struct sockaddr *) &from, &fromlen);
1187         if (res < 0) {
1188                 perror("recvfrom(ctrl_iface)");
1189                 return;
1190         }
1191         buf[res] = '\0';
1192
1193         os_memcpy(reply, "OK\n", 3);
1194         reply_len = 3;
1195
1196         if (os_strcmp(buf, "PING") == 0) {
1197                 os_memcpy(reply, "PONG\n", 5);
1198                 reply_len = 5;
1199         } else if (os_strncmp(buf, "ADD ", 4) == 0) {
1200                 if (hostapd_ctrl_iface_add(interfaces, buf + 4) < 0)
1201                         reply_len = -1;
1202         } else if (os_strncmp(buf, "REMOVE ", 7) == 0) {
1203                 if (hostapd_ctrl_iface_remove(interfaces, buf + 7) < 0)
1204                         reply_len = -1;
1205         } else {
1206                 wpa_printf(MSG_DEBUG, "Unrecognized global ctrl_iface command "
1207                            "ignored");
1208                 reply_len = -1;
1209         }
1210
1211         if (reply_len < 0) {
1212                 os_memcpy(reply, "FAIL\n", 5);
1213                 reply_len = 5;
1214         }
1215
1216         sendto(sock, reply, reply_len, 0, (struct sockaddr *) &from, fromlen);
1217 }
1218
1219
1220 static char * hostapd_global_ctrl_iface_path(struct hapd_interfaces *interface)
1221 {
1222         char *buf;
1223         size_t len;
1224
1225         if (interface->global_iface_path == NULL)
1226                 return NULL;
1227
1228         len = os_strlen(interface->global_iface_path) +
1229                 os_strlen(interface->global_iface_name) + 2;
1230         buf = os_malloc(len);
1231         if (buf == NULL)
1232                 return NULL;
1233
1234         os_snprintf(buf, len, "%s/%s", interface->global_iface_path,
1235                     interface->global_iface_name);
1236         buf[len - 1] = '\0';
1237         return buf;
1238 }
1239
1240
1241 int hostapd_global_ctrl_iface_init(struct hapd_interfaces *interface)
1242 {
1243         struct sockaddr_un addr;
1244         int s = -1;
1245         char *fname = NULL;
1246
1247         if (interface->global_iface_path == NULL) {
1248                 wpa_printf(MSG_DEBUG, "ctrl_iface not configured!");
1249                 return 0;
1250         }
1251
1252         if (mkdir(interface->global_iface_path, S_IRWXU | S_IRWXG) < 0) {
1253                 if (errno == EEXIST) {
1254                         wpa_printf(MSG_DEBUG, "Using existing control "
1255                                    "interface directory.");
1256                 } else {
1257                         perror("mkdir[ctrl_interface]");
1258                         goto fail;
1259                 }
1260         }
1261
1262         if (os_strlen(interface->global_iface_path) + 1 +
1263             os_strlen(interface->global_iface_name) >= sizeof(addr.sun_path))
1264                 goto fail;
1265
1266         s = socket(PF_UNIX, SOCK_DGRAM, 0);
1267         if (s < 0) {
1268                 perror("socket(PF_UNIX)");
1269                 goto fail;
1270         }
1271
1272         os_memset(&addr, 0, sizeof(addr));
1273 #ifdef __FreeBSD__
1274         addr.sun_len = sizeof(addr);
1275 #endif /* __FreeBSD__ */
1276         addr.sun_family = AF_UNIX;
1277         fname = hostapd_global_ctrl_iface_path(interface);
1278         if (fname == NULL)
1279                 goto fail;
1280         os_strlcpy(addr.sun_path, fname, sizeof(addr.sun_path));
1281         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1282                 wpa_printf(MSG_DEBUG, "ctrl_iface bind(PF_UNIX) failed: %s",
1283                            strerror(errno));
1284                 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1285                         wpa_printf(MSG_DEBUG, "ctrl_iface exists, but does not"
1286                                    " allow connections - assuming it was left"
1287                                    "over from forced program termination");
1288                         if (unlink(fname) < 0) {
1289                                 perror("unlink[ctrl_iface]");
1290                                 wpa_printf(MSG_ERROR, "Could not unlink "
1291                                            "existing ctrl_iface socket '%s'",
1292                                            fname);
1293                                 goto fail;
1294                         }
1295                         if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) <
1296                             0) {
1297                                 perror("bind(PF_UNIX)");
1298                                 goto fail;
1299                         }
1300                         wpa_printf(MSG_DEBUG, "Successfully replaced leftover "
1301                                    "ctrl_iface socket '%s'", fname);
1302                 } else {
1303                         wpa_printf(MSG_INFO, "ctrl_iface exists and seems to "
1304                                    "be in use - cannot override it");
1305                         wpa_printf(MSG_INFO, "Delete '%s' manually if it is "
1306                                    "not used anymore", fname);
1307                         os_free(fname);
1308                         fname = NULL;
1309                         goto fail;
1310                 }
1311         }
1312
1313         if (chmod(fname, S_IRWXU | S_IRWXG) < 0) {
1314                 perror("chmod[ctrl_interface/ifname]");
1315                 goto fail;
1316         }
1317         os_free(fname);
1318
1319         interface->global_ctrl_sock = s;
1320         eloop_register_read_sock(s, hostapd_global_ctrl_iface_receive,
1321                                  interface, NULL);
1322
1323         return 0;
1324
1325 fail:
1326         if (s >= 0)
1327                 close(s);
1328         if (fname) {
1329                 unlink(fname);
1330                 os_free(fname);
1331         }
1332         return -1;
1333 }
1334
1335
1336 void hostapd_global_ctrl_iface_deinit(struct hapd_interfaces *interfaces)
1337 {
1338         char *fname = NULL;
1339
1340         if (interfaces->global_ctrl_sock > -1) {
1341                 eloop_unregister_read_sock(interfaces->global_ctrl_sock);
1342                 close(interfaces->global_ctrl_sock);
1343                 interfaces->global_ctrl_sock = -1;
1344                 fname = hostapd_global_ctrl_iface_path(interfaces);
1345                 if (fname) {
1346                         unlink(fname);
1347                         os_free(fname);
1348                 }
1349
1350                 if (interfaces->global_iface_path &&
1351                     rmdir(interfaces->global_iface_path) < 0) {
1352                         if (errno == ENOTEMPTY) {
1353                                 wpa_printf(MSG_DEBUG, "Control interface "
1354                                            "directory not empty - leaving it "
1355                                            "behind");
1356                         } else {
1357                                 perror("rmdir[ctrl_interface]");
1358                         }
1359                 }
1360                 os_free(interfaces->global_iface_path);
1361                 interfaces->global_iface_path = NULL;
1362         }
1363 }
1364
1365
1366 static void hostapd_ctrl_iface_send(struct hostapd_data *hapd, int level,
1367                                     const char *buf, size_t len)
1368 {
1369         struct wpa_ctrl_dst *dst, *next;
1370         struct msghdr msg;
1371         int idx;
1372         struct iovec io[2];
1373         char levelstr[10];
1374
1375         dst = hapd->ctrl_dst;
1376         if (hapd->ctrl_sock < 0 || dst == NULL)
1377                 return;
1378
1379         os_snprintf(levelstr, sizeof(levelstr), "<%d>", level);
1380         io[0].iov_base = levelstr;
1381         io[0].iov_len = os_strlen(levelstr);
1382         io[1].iov_base = (char *) buf;
1383         io[1].iov_len = len;
1384         os_memset(&msg, 0, sizeof(msg));
1385         msg.msg_iov = io;
1386         msg.msg_iovlen = 2;
1387
1388         idx = 0;
1389         while (dst) {
1390                 next = dst->next;
1391                 if (level >= dst->debug_level) {
1392                         wpa_hexdump(MSG_DEBUG, "CTRL_IFACE monitor send",
1393                                     (u8 *) dst->addr.sun_path, dst->addrlen -
1394                                     offsetof(struct sockaddr_un, sun_path));
1395                         msg.msg_name = &dst->addr;
1396                         msg.msg_namelen = dst->addrlen;
1397                         if (sendmsg(hapd->ctrl_sock, &msg, 0) < 0) {
1398                                 int _errno = errno;
1399                                 wpa_printf(MSG_INFO, "CTRL_IFACE monitor[%d]: "
1400                                            "%d - %s",
1401                                            idx, errno, strerror(errno));
1402                                 dst->errors++;
1403                                 if (dst->errors > 10 || _errno == ENOENT) {
1404                                         hostapd_ctrl_iface_detach(
1405                                                 hapd, &dst->addr,
1406                                                 dst->addrlen);
1407                                 }
1408                         } else
1409                                 dst->errors = 0;
1410                 }
1411                 idx++;
1412                 dst = next;
1413         }
1414 }
1415
1416 #endif /* CONFIG_NATIVE_WINDOWS */