roy.marples.name Git - dhcpcd-ui/blob - src/libdhcpcd/wpa.c

   1 /*
   2  * libdhcpcd
   3  * Copyright 2009-2014 Roy Marples <roy@marples.name>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/socket.h>
  28 #include <sys/stat.h>
  29 #include <sys/un.h>
  30
  31 #include <assert.h>
  32 #include <errno.h>
  33 #include <limits.h>
  34 #include <poll.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39
  40 #define IN_LIBDHCPCD
  41 #include "config.h"
  42 #include "dhcpcd.h"
  43
  44 #ifndef SUN_LEN
  45 #define SUN_LEN(su) \
  46         (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
  47 #endif
  48
  49 #define CLAMP(x, low, high) \
  50         (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
  51
  52 static int
  53 wpa_open(const char *ifname, char **path)
  54 {
  55         static int counter;
  56         int fd;
  57         socklen_t len;
  58         struct sockaddr_un sun;
  59
  60         if ((fd = socket(AF_UNIX,
  61             SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0)) == -1)
  62                 return -1;
  63         memset(&sun, 0, sizeof(sun));
  64         sun.sun_family = AF_UNIX;
  65         snprintf(sun.sun_path, sizeof(sun.sun_path),
  66             "/tmp/libdhcpcd-wpa-%d.%d", getpid(), counter++);
  67         *path = strdup(sun.sun_path);
  68         len = (socklen_t)SUN_LEN(&sun);
  69         if (bind(fd, (struct sockaddr *)&sun, len) == -1) {
  70                 close(fd);
  71                 unlink(*path);
  72                 free(*path);
  73                 *path = NULL;
  74                 return -1;
  75         }
  76         snprintf(sun.sun_path, sizeof(sun.sun_path),
  77             WPA_CTRL_DIR "/%s", ifname);
  78         len = (socklen_t)SUN_LEN(&sun);
  79         if (connect(fd, (struct sockaddr *)&sun, len) == -1) {
  80                 close(fd);
  81                 unlink(*path);
  82                 free(*path);
  83                 *path = NULL;
  84                 return -1;
  85         }
  86
  87         return fd;
  88 }
  89
  90 static ssize_t
  91 wpa_cmd(int fd, const char *cmd, char *buffer, size_t len)
  92 {
  93         int retval;
  94         ssize_t bytes;
  95         struct pollfd pfd;
  96
  97         if (buffer)
  98                 *buffer = '\0';
  99         bytes = write(fd, cmd, strlen(cmd));
 100         if (bytes == -1 || bytes == 0)
 101                 return -1;
 102         if (buffer == NULL || len == 0)
 103                 return 0;
 104         pfd.fd = fd;
 105         pfd.events = POLLIN | POLLHUP;
 106         pfd.revents = 0;
 107         retval = poll(&pfd, 1, 2000);
 108         if (retval == -1)
 109                 return -1;
 110         if (retval == 0 || !(pfd.revents & (POLLIN | POLLHUP)))
 111                 return -1;
 112
 113         bytes = read(fd, buffer, len == 1 ? 1 : len - 1);
 114         if (bytes != -1)
 115                 buffer[bytes] = '\0';
 116         return bytes;
 117 }
 118
 119 bool
 120 dhcpcd_wpa_command(DHCPCD_WPA *wpa, const char *cmd)
 121 {
 122         char buf[10];
 123         ssize_t bytes;
 124
 125         bytes = wpa_cmd(wpa->command_fd, cmd, buf, sizeof(buf));
 126         return (bytes == -1 || bytes == 0 ||
 127             strcmp(buf, "OK\n")) ? false : true;
 128 }
 129
 130 bool
 131 dhcpcd_wpa_command_arg(DHCPCD_WPA *wpa, const char *cmd, const char *arg)
 132 {
 133         size_t cmdlen, nlen;
 134
 135         cmdlen = strlen(cmd);
 136         nlen = cmdlen + strlen(arg) + 2;
 137         if (!dhcpcd_realloc(wpa->con, nlen))
 138                 return -1;
 139         strlcpy(wpa->con->buf, cmd, wpa->con->buflen);
 140         wpa->con->buf[cmdlen] = ' ';
 141         strlcpy(wpa->con->buf + cmdlen + 1, arg, wpa->con->buflen - 1 - cmdlen);
 142         return dhcpcd_wpa_command(wpa, wpa->con->buf);
 143 }
 144
 145 static bool
 146 dhcpcd_attach_detach(DHCPCD_WPA *wpa, bool attach)
 147 {
 148         char buf[10];
 149         ssize_t bytes;
 150
 151         if (wpa->attached == attach)
 152                 return true;
 153
 154         bytes = wpa_cmd(wpa->listen_fd, attach > 0 ? "ATTACH" : "DETACH",
 155             buf, sizeof(buf));
 156         if (bytes == -1 || bytes == 0 || strcmp(buf, "OK\n"))
 157                 return false;
 158
 159         wpa->attached = attach;
 160         return true;
 161 }
 162
 163 bool
 164 dhcpcd_wpa_scan(DHCPCD_WPA *wpa)
 165 {
 166
 167         return dhcpcd_wpa_command(wpa, "SCAN");
 168 }
 169
 170 void
 171 dhcpcd_wi_scans_free(DHCPCD_WI_SCAN *wis)
 172 {
 173         DHCPCD_WI_SCAN *n;
 174
 175         while (wis) {
 176                 n = wis->next;
 177                 free(wis);
 178                 wis = n;
 179         }
 180 }
 181
 182 static void
 183 dhcpcd_strtoi(int *val, const char *s)
 184 {
 185         long l;
 186
 187         l = strtol(s, NULL, 0);
 188         if (l >= INT_MIN && l <= INT_MAX)
 189                 *val = (int)l;
 190         else
 191                 errno = ERANGE;
 192 }
 193
 194 static DHCPCD_WI_SCAN *
 195 dhcpcd_wpa_scans_read(DHCPCD_WPA *wpa)
 196 {
 197         size_t i;
 198         ssize_t bytes;
 199         DHCPCD_WI_SCAN *wis, *w, *l;
 200         char *s, *p, buf[32];
 201
 202         if (!dhcpcd_realloc(wpa->con, 2048))
 203                 return NULL;
 204         wis = NULL;
 205         for (i = 0; i < 1000; i++) {
 206                 snprintf(buf, sizeof(buf), "BSS %zu", i);
 207                 bytes = wpa_cmd(wpa->command_fd, buf,
 208                     wpa->con->buf, wpa->con->buflen);
 209                 if (bytes == 0 || bytes == -1 ||
 210                     strncmp(wpa->con->buf, "FAIL", 4) == 0)
 211                         break;
 212                 p = wpa->con->buf;
 213                 w = calloc(1, sizeof(*w));
 214                 if (w == NULL)
 215                         break;
 216                 if (wis == NULL)
 217                         wis = w;
 218                 else
 219                         l->next = w;
 220                 l = w;
 221                 while ((s = strsep(&p, "\n"))) {
 222                         if (*s == '\0')
 223                                 continue;
 224                         if (strncmp(s, "bssid=", 6) == 0)
 225                                 strlcpy(w->bssid, s + 6, sizeof(w->bssid));
 226                         else if (strncmp(s, "freq=", 5) == 0)
 227                                 dhcpcd_strtoi(&w->frequency, s + 5);
 228 //                      else if (strncmp(s, "beacon_int=", 11) == 0)
 229 //                              ;
 230                         else if (strncmp(s, "qual=", 5) == 0)
 231                                 dhcpcd_strtoi(&w->quality.value, s + 5);
 232                         else if (strncmp(s, "noise=", 6) == 0)
 233                                 dhcpcd_strtoi(&w->noise.value, s + 6);
 234                         else if (strncmp(s, "level=", 6) == 0)
 235                                 dhcpcd_strtoi(&w->level.value, s + 6);
 236                         else if (strncmp(s, "flags=", 6) == 0)
 237                                 strlcpy(w->flags, s + 6, sizeof(w->flags));
 238                         else if (strncmp(s, "ssid=", 5) == 0)
 239                                 strlcpy(w->ssid, s + 5, sizeof(w->ssid));
 240                 }
 241
 242                 w->strength.value = w->level.value;
 243                 if (w->strength.value > 110 && w->strength.value < 256)
 244                         /* Convert WEXT level to dBm */
 245                         w->strength.value -= 256;
 246
 247                 if (w->strength.value < 0) {
 248                         /* Assume dBm */
 249                         w->strength.value =
 250                             abs(CLAMP(w->strength.value, -100, -40) + 40);
 251                         w->strength.value =
 252                             100 - ((100 * w->strength.value) / 60);
 253                 } else {
 254                         /* Assume quality percentage */
 255                         w->strength.value = CLAMP(w->strength.value, 0, 100);
 256                 }
 257
 258         }
 259         return wis;
 260 }
 261
 262 DHCPCD_WI_SCAN *
 263 dhcpcd_wi_scans(DHCPCD_IF *i)
 264 {
 265         DHCPCD_WPA *wpa;
 266         DHCPCD_WI_SCAN *wis, *w;
 267         int nh;
 268         DHCPCD_WI_HIST *h, *hl;
 269
 270         wpa = dhcpcd_wpa_find(i->con, i->ifname);
 271         if (wpa == NULL)
 272                 return NULL;
 273         wis = dhcpcd_wpa_scans_read(wpa);
 274         for (w = wis; w; w = w->next) {
 275                 nh = 1;
 276                 hl = NULL;
 277                 w->quality.average = w->quality.value;
 278                 w->noise.average = w->noise.value;
 279                 w->level.average = w->level.value;
 280                 w->strength.average = w->strength.value;
 281
 282                 for (h = wpa->con->wi_history; h; h = h->next) {
 283                         if (strcmp(h->ifname, i->ifname) == 0 &&
 284                             strcmp(h->bssid, wis->bssid) == 0)
 285                         {
 286                                 w->quality.average += h->quality;
 287                                 w->noise.average += h->noise;
 288                                 w->level.average += h->level;
 289                                 w->strength.average += h->strength;
 290                                 if (++nh == DHCPCD_WI_HIST_MAX) {
 291                                         hl->next = h->next;
 292                                         free(h);
 293                                         break;
 294                                 }
 295                         }
 296                         hl = h;
 297                 }
 298
 299                 if (nh != 1) {
 300                         w->quality.average /= nh;
 301                         w->noise.average /= nh;
 302                         w->level.average /= nh;
 303                         w->strength.average /= nh;
 304                 }
 305                 h = malloc(sizeof(*h));
 306                 if (h) {
 307                         strlcpy(h->ifname, i->ifname, sizeof(h->ifname));
 308                         strlcpy(h->bssid, w->bssid, sizeof(h->bssid));
 309                         h->quality = w->quality.value;
 310                         h->noise = w->noise.value;
 311                         h->level = w->level.value;
 312                         h->strength = w->strength.value;
 313                         h->next = wpa->con->wi_history;
 314                         wpa->con->wi_history = h;
 315                 }
 316         }
 317
 318         return wis;
 319 }
 320
 321 bool
 322 dhcpcd_wpa_reassociate(DHCPCD_WPA *wpa)
 323 {
 324
 325         return dhcpcd_wpa_command(wpa, "REASSOCIATE");
 326 }
 327
 328 bool
 329 dhcpcd_wpa_disconnect(DHCPCD_WPA *wpa)
 330 {
 331
 332         return dhcpcd_wpa_command(wpa, "DISCONNECT");
 333 }
 334
 335 bool
 336 dhcpcd_wpa_config_write(DHCPCD_WPA *wpa)
 337 {
 338
 339         return dhcpcd_wpa_command(wpa, "SAVE_CONFIG");
 340 }
 341
 342 static bool
 343 dhcpcd_wpa_network(DHCPCD_WPA *wpa, const char *cmd, int id)
 344 {
 345         size_t len;
 346
 347         len = strlen(cmd) + 32;
 348         if (!dhcpcd_realloc(wpa->con, len))
 349                 return false;
 350         snprintf(wpa->con->buf, wpa->con->buflen, "%s %d", cmd, id);
 351         return dhcpcd_wpa_command(wpa, wpa->con->buf);
 352 }
 353
 354 bool
 355 dhcpcd_wpa_network_disable(DHCPCD_WPA *wpa, int id)
 356 {
 357
 358         return dhcpcd_wpa_network(wpa, "DISABLE_NETWORK", id);
 359 }
 360
 361 bool
 362 dhcpcd_wpa_network_enable(DHCPCD_WPA *wpa, int id)
 363 {
 364
 365         return dhcpcd_wpa_network(wpa, "ENABLE_NETWORK", id);
 366 }
 367
 368 bool
 369 dhcpcd_wpa_network_remove(DHCPCD_WPA *wpa, int id)
 370 {
 371
 372         return dhcpcd_wpa_network(wpa, "REMOVE_NETWORK", id);
 373 }
 374
 375 char *
 376 dhcpcd_wpa_network_get(DHCPCD_WPA *wpa, int id, const char *param)
 377 {
 378         ssize_t bytes;
 379
 380         if (!dhcpcd_realloc(wpa->con, 2048))
 381                 return NULL;
 382         snprintf(wpa->con->buf, wpa->con->buflen, "GET_NETWORK %d %s",
 383             id, param);
 384         bytes = wpa_cmd(wpa->command_fd, wpa->con->buf,
 385             wpa->con->buf, wpa->con->buflen);
 386         if (bytes == 0 || bytes == -1)
 387                 return NULL;
 388         if (strcmp(wpa->con->buf, "FAIL\n") == 0) {
 389                 errno = EINVAL;
 390                 return NULL;
 391         }
 392         return wpa->con->buf;
 393 }
 394
 395 bool
 396 dhcpcd_wpa_network_set(DHCPCD_WPA *wpa, int id,
 397     const char *param, const char *value)
 398 {
 399         size_t len;
 400
 401         len = strlen("SET_NETWORK") + 32 + strlen(param) + strlen(value) + 3;
 402         if (!dhcpcd_realloc(wpa->con, len))
 403                 return false;
 404         snprintf(wpa->con->buf, wpa->con->buflen, "SET_NETWORK %d %s %s",
 405             id, param, value);
 406         return dhcpcd_wpa_command(wpa, wpa->con->buf);
 407 }
 408
 409 static int
 410 dhcpcd_wpa_network_find(DHCPCD_WPA *wpa, const char *fssid)
 411 {
 412         ssize_t bytes;
 413         char *s, *t, *ssid, *bssid, *flags;
 414         long l;
 415
 416         dhcpcd_realloc(wpa->con, 2048);
 417         bytes = wpa_cmd(wpa->command_fd, "LIST_NETWORKS",
 418             wpa->con->buf, wpa->con->buflen);
 419         if (bytes == 0 || bytes == -1)
 420                 return -1;
 421
 422         s = strchr(wpa->con->buf, '\n');
 423         if (s == NULL)
 424                 return -1;
 425         while ((t = strsep(&s, "\b"))) {
 426                 if (*t == '\0')
 427                         continue;
 428                 ssid = strchr(t, '\t');
 429                 if (ssid == NULL)
 430                         break;
 431                 *ssid++ = '\0';
 432                 bssid = strchr(ssid, '\t');
 433                 if (bssid == NULL)
 434                         break;
 435                 *bssid++ = '\0';
 436                 flags = strchr(bssid, '\t');
 437                 if (flags == NULL)
 438                         break;
 439                 *flags++ = '\0';
 440                 l = strtol(t, NULL, 0);
 441                 if (l < 0 || l > INT_MAX) {
 442                         errno = ERANGE;
 443                         break;
 444                 }
 445                 if (strcmp(ssid, fssid) == 0)
 446                         return (int)l;
 447         }
 448         errno = ENOENT;
 449         return -1;
 450 }
 451
 452 static int
 453 dhcpcd_wpa_network_new(DHCPCD_WPA *wpa)
 454 {
 455         ssize_t bytes;
 456         long l;
 457
 458         dhcpcd_realloc(wpa->con, 32);
 459         bytes = wpa_cmd(wpa->command_fd, "ADD_NETWORK",
 460             wpa->con->buf, sizeof(wpa->con->buf));
 461         if (bytes == 0 || bytes == -1)
 462                 return -1;
 463         l = strtol(wpa->con->buf, NULL, 0);
 464         if (l < 0 || l > INT_MAX) {
 465                 errno = ERANGE;
 466                 return -1;
 467         }
 468         return (int)l;
 469 }
 470
 471 int
 472 dhcpcd_wpa_network_find_new(DHCPCD_WPA *wpa, const char *ssid)
 473 {
 474         int id;
 475
 476         id = dhcpcd_wpa_network_find(wpa, ssid);
 477         if (id == -1)
 478                 id = dhcpcd_wpa_network_new(wpa);
 479         return id;
 480 }
 481
 482 void
 483 dhcpcd_wpa_close(DHCPCD_WPA *wpa)
 484 {
 485
 486         assert(wpa);
 487
 488         if (wpa->command_fd == -1 || !wpa->open)
 489                 return;
 490
 491         wpa->open = false;
 492         dhcpcd_attach_detach(wpa, false);
 493         shutdown(wpa->command_fd, SHUT_RDWR);
 494         shutdown(wpa->listen_fd, SHUT_RDWR);
 495
 496         if (wpa->con->wpa_status_cb)
 497                 wpa->con->wpa_status_cb(wpa, "down",
 498                     wpa->con->wpa_status_context);
 499
 500         close(wpa->command_fd);
 501         wpa->command_fd = -1;
 502         close(wpa->listen_fd);
 503         wpa->listen_fd = -1;
 504         unlink(wpa->command_path);
 505         free(wpa->command_path);
 506         wpa->command_path = NULL;
 507         unlink(wpa->listen_path);
 508         free(wpa->listen_path);
 509         wpa->listen_path = NULL;
 510 }
 511
 512 DHCPCD_WPA *
 513 dhcpcd_wpa_find(DHCPCD_CONNECTION *con, const char *ifname)
 514 {
 515         DHCPCD_WPA *wpa;
 516
 517         for (wpa = con->wpa; wpa; wpa = wpa->next) {
 518                 if (strcmp(wpa->ifname, ifname) == 0)
 519                         return wpa;
 520         }
 521         errno = ENOENT;
 522         return NULL;
 523 }
 524
 525 DHCPCD_WPA *
 526 dhcpcd_wpa_new(DHCPCD_CONNECTION *con, const char *ifname)
 527 {
 528         DHCPCD_WPA *wpa;
 529
 530         wpa = dhcpcd_wpa_find(con, ifname);
 531         if (wpa)
 532                 return wpa;
 533
 534         wpa = malloc(sizeof(*wpa));
 535         if (wpa == NULL)
 536                 return NULL;
 537
 538         wpa->con = con;
 539         strlcpy(wpa->ifname, ifname, sizeof(wpa->ifname));
 540         wpa->command_fd = wpa->listen_fd = -1;
 541         wpa->command_path = wpa->listen_path = NULL;
 542         wpa->next = con->wpa;
 543         con->wpa = wpa;
 544         return wpa;
 545 }
 546
 547 DHCPCD_CONNECTION *
 548 dhcpcd_wpa_connection(DHCPCD_WPA *wpa)
 549 {
 550
 551         assert(wpa);
 552         return wpa->con;
 553 }
 554
 555 DHCPCD_IF *
 556 dhcpcd_wpa_if(DHCPCD_WPA *wpa)
 557 {
 558
 559         return dhcpcd_get_if(wpa->con, wpa->ifname, "link");
 560 }
 561
 562 int
 563 dhcpcd_wpa_open(DHCPCD_WPA *wpa)
 564 {
 565         int cmd_fd, list_fd = -1;
 566         char *cmd_path = NULL, *list_path = NULL;
 567
 568         if (wpa->listen_fd != -1) {
 569                 if (!wpa->open) {
 570                         errno = EISCONN;
 571                         return -1;
 572                 }
 573                 return wpa->listen_fd;
 574         }
 575
 576         cmd_fd = wpa_open(wpa->ifname, &cmd_path);
 577         if (cmd_fd == -1)
 578                 goto fail;
 579
 580         list_fd = wpa_open(wpa->ifname, &list_path);
 581         if (list_fd == -1)
 582                 goto fail;
 583
 584         wpa->open = true;
 585         wpa->attached = false;
 586         wpa->command_fd = cmd_fd;
 587         wpa->command_path = cmd_path;
 588         wpa->listen_fd = list_fd;
 589         wpa->listen_path = list_path;
 590         if (!dhcpcd_attach_detach(wpa, true)) {
 591                 dhcpcd_wpa_close(wpa);
 592                 return -1;
 593         }
 594
 595         if (wpa->con->wi_scanresults_cb)
 596                 wpa->con->wi_scanresults_cb(wpa,
 597                     wpa->con->wi_scanresults_context);
 598
 599         return wpa->listen_fd;
 600
 601 fail:
 602         if (cmd_fd != -1)
 603                 close(cmd_fd);
 604         if (list_fd != -1)
 605                 close(list_fd);
 606         if (cmd_path)
 607                 unlink(cmd_path);
 608         free(cmd_path);
 609         if (list_path)
 610                 free(list_path);
 611         return -1;
 612 }
 613
 614 int
 615 dhcpcd_wpa_get_fd(DHCPCD_WPA *wpa)
 616 {
 617
 618         assert(wpa);
 619         return wpa->open ? wpa->listen_fd : -1;
 620 }
 621
 622 void
 623 dhcpcd_wpa_set_scan_callback(DHCPCD_CONNECTION *con,
 624     void (*cb)(DHCPCD_WPA *, void *), void *context)
 625 {
 626
 627         assert(con);
 628         con->wi_scanresults_cb = cb;
 629         con->wi_scanresults_context = context;
 630 }
 631
 632 void
 633 dhcpcd_wpa_dispatch(DHCPCD_WPA *wpa)
 634 {
 635         char buffer[256], *p;
 636         size_t bytes;
 637
 638         assert(wpa);
 639         bytes = (size_t)read(wpa->listen_fd, buffer, sizeof(buffer));
 640         if ((ssize_t)bytes == -1 || bytes == 0) {
 641                 dhcpcd_wpa_close(wpa);
 642                 return;
 643         }
 644
 645         buffer[bytes] = '\0';
 646         bytes = strlen(buffer);
 647         if (buffer[bytes - 1] == ' ')
 648                 buffer[--bytes] = '\0';
 649         for (p = buffer + 1; *p != '\0'; p++)
 650                 if (*p == '>') {
 651                         p++;
 652                         break;
 653                 }
 654         if (strcmp(p, "CTRL-EVENT-SCAN-RESULTS") == 0 &&
 655             wpa->con->wi_scanresults_cb)
 656                 wpa->con->wi_scanresults_cb(wpa,
 657                     wpa->con->wi_scanresults_context);
 658         return;
 659 }
 660
 661 void
 662 dhcpcd_wpa_if_event(DHCPCD_IF *i)
 663 {
 664         DHCPCD_WPA *wpa;
 665
 666         assert(i);
 667         if (i->wireless && strcmp(i->type, "link") == 0) {
 668                 if (strcmp(i->reason, "STOPPED") == 0) {
 669                         wpa = dhcpcd_wpa_find(i->con, i->ifname);
 670                         if (wpa)
 671                                 dhcpcd_wpa_close(wpa);
 672                 } else if (i->con->wpa_started) {
 673                         wpa = dhcpcd_wpa_new(i->con, i->ifname);
 674                         if (wpa && wpa->listen_fd == -1)
 675                                 dhcpcd_wpa_open(wpa);
 676                 }
 677         }
 678 }
 679
 680 void
 681 dhcpcd_wpa_start(DHCPCD_CONNECTION *con)
 682 {
 683         DHCPCD_IF *i;
 684
 685         assert(con);
 686         con->wpa_started = true;
 687
 688         for (i = con->interfaces; i; i = i->next)
 689                 dhcpcd_wpa_if_event(i);
 690 }
 691
 692 int
 693 dhcpcd_wpa_configure_psk(DHCPCD_WPA *wpa, DHCPCD_WI_SCAN *s, const char *psk)
 694 {
 695         const char *mgmt, *var;
 696         int id;
 697         char *npsk;
 698         size_t psk_len;
 699         bool r;
 700
 701         assert(wpa);
 702         assert(s);
 703
 704         id = dhcpcd_wpa_network_find_new(wpa, s->ssid);
 705         if (id == -1)
 706                 return DHCPCD_WPA_ERR;
 707
 708         if (strcmp(s->flags, "[WEP]") == 0) {
 709                 mgmt = "NONE";
 710                 var = "wep_key0";
 711         } else {
 712                 mgmt = "WPA-PSK";
 713                 var = "psk";
 714         }
 715
 716         if (!dhcpcd_wpa_network_set(wpa, id, "key_mgmt", mgmt))
 717                 return DHCPCD_WPA_ERR_SET;
 718
 719         if (psk)
 720                 psk_len = strlen(psk);
 721         else
 722                 psk_len = 0;
 723         npsk = malloc(psk_len + 3);
 724         if (npsk == NULL)
 725                 return DHCPCD_WPA_ERR;
 726         npsk[0] = '"';
 727         if (psk_len)
 728                 memcpy(npsk + 1, psk, psk_len);
 729         npsk[psk_len + 1] = '"';
 730         npsk[psk_len + 2] = '\0';
 731         r = dhcpcd_wpa_network_set(wpa, id, var, npsk);
 732         free(npsk);
 733         if (!r)
 734                 return DHCPCD_WPA_ERR_SET_PSK;
 735
 736         if (!dhcpcd_wpa_network_enable(wpa, id))
 737                 return DHCPCD_WPA_ERR_ENABLE;
 738         if (!dhcpcd_wpa_reassociate(wpa))
 739                 return DHCPCD_WPA_ERR_ASSOC;
 740         if (!dhcpcd_wpa_config_write(wpa))
 741                 return DHCPCD_WPA_ERR_WRITE;
 742         return DHCPCD_WPA_SUCCESS;
 743 }