lib/tsocket/tsocket_bsd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Stefan Metzmacher 2009
   5
   6      ** NOTE! The following LGPL license applies to the tsocket
   7      ** library. This does NOT imply that all of Samba is released
   8      ** under the LGPL
   9
  10    This library is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Lesser General Public
  12    License as published by the Free Software Foundation; either
  13    version 3 of the License, or (at your option) any later version.
  14
  15    This library is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    Lesser General Public License for more details.
  19
  20    You should have received a copy of the GNU Lesser General Public
  21    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "replace.h"
  25 #include "system/filesys.h"
  26 #include "system/network.h"
  27 #include "tsocket.h"
  28 #include "tsocket_internal.h"
  29
  30 static int tsocket_bsd_error_from_errno(int ret,
  31                                         int sys_errno,
  32                                         bool *retry)
  33 {
  34         *retry = false;
  35
  36         if (ret >= 0) {
  37                 return 0;
  38         }
  39
  40         if (ret != -1) {
  41                 return EIO;
  42         }
  43
  44         if (sys_errno == 0) {
  45                 return EIO;
  46         }
  47
  48         if (sys_errno == EINTR) {
  49                 *retry = true;
  50                 return sys_errno;
  51         }
  52
  53         if (sys_errno == EINPROGRESS) {
  54                 *retry = true;
  55                 return sys_errno;
  56         }
  57
  58         if (sys_errno == EAGAIN) {
  59                 *retry = true;
  60                 return sys_errno;
  61         }
  62
  63 #ifdef EWOULDBLOCK
  64         if (sys_errno == EWOULDBLOCK) {
  65                 *retry = true;
  66                 return sys_errno;
  67         }
  68 #endif
  69
  70         return sys_errno;
  71 }
  72
  73 static int tsocket_bsd_common_prepare_fd(int fd, bool high_fd)
  74 {
  75         int i;
  76         int sys_errno = 0;
  77         int fds[3];
  78         int num_fds = 0;
  79
  80         int result, flags;
  81
  82         if (fd == -1) {
  83                 return -1;
  84         }
  85
  86         /* first make a fd >= 3 */
  87         if (high_fd) {
  88                 while (fd < 3) {
  89                         fds[num_fds++] = fd;
  90                         fd = dup(fd);
  91                         if (fd == -1) {
  92                                 sys_errno = errno;
  93                                 break;
  94                         }
  95                 }
  96                 for (i=0; i<num_fds; i++) {
  97                         close(fds[i]);
  98                 }
  99                 if (fd == -1) {
 100                         errno = sys_errno;
 101                         return fd;
 102                 }
 103         }
 104
 105         /* fd should be nonblocking. */
 106
 107 #ifdef O_NONBLOCK
 108 #define FLAG_TO_SET O_NONBLOCK
 109 #else
 110 #ifdef SYSV
 111 #define FLAG_TO_SET O_NDELAY
 112 #else /* BSD */
 113 #define FLAG_TO_SET FNDELAY
 114 #endif
 115 #endif
 116
 117         if ((flags = fcntl(fd, F_GETFL)) == -1) {
 118                 goto fail;
 119         }
 120
 121         flags |= FLAG_TO_SET;
 122         if (fcntl(fd, F_SETFL, flags) == -1) {
 123                 goto fail;
 124         }
 125
 126 #undef FLAG_TO_SET
 127
 128         /* fd should be closed on exec() */
 129 #ifdef FD_CLOEXEC
 130         result = flags = fcntl(fd, F_GETFD, 0);
 131         if (flags >= 0) {
 132                 flags |= FD_CLOEXEC;
 133                 result = fcntl(fd, F_SETFD, flags);
 134         }
 135         if (result < 0) {
 136                 goto fail;
 137         }
 138 #endif
 139         return fd;
 140
 141  fail:
 142         if (fd != -1) {
 143                 sys_errno = errno;
 144                 close(fd);
 145                 errno = sys_errno;
 146         }
 147         return -1;
 148 }
 149
 150 static ssize_t tsocket_bsd_pending(int fd)
 151 {
 152         int ret, error;
 153         int value = 0;
 154         socklen_t len;
 155
 156         ret = ioctl(fd, FIONREAD, &value);
 157         if (ret == -1) {
 158                 return ret;
 159         }
 160
 161         if (ret != 0) {
 162                 /* this should not be reached */
 163                 errno = EIO;
 164                 return -1;
 165         }
 166
 167         if (value != 0) {
 168                 return value;
 169         }
 170
 171         error = 0;
 172         len = sizeof(error);
 173
 174         /*
 175          * if no data is available check if the socket is in error state. For
 176          * dgram sockets it's the way to return ICMP error messages of
 177          * connected sockets to the caller.
 178          */
 179         ret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len);
 180         if (ret == -1) {
 181                 return ret;
 182         }
 183         if (error != 0) {
 184                 errno = error;
 185                 return -1;
 186         }
 187         return 0;
 188 }
 189
 190 static const struct tsocket_address_ops tsocket_address_bsd_ops;
 191
 192 struct tsocket_address_bsd {
 193         socklen_t sa_socklen;
 194         union {
 195                 struct sockaddr sa;
 196                 struct sockaddr_in in;
 197 #ifdef HAVE_IPV6
 198                 struct sockaddr_in6 in6;
 199 #endif
 200                 struct sockaddr_un un;
 201                 struct sockaddr_storage ss;
 202         } u;
 203 };
 204
 205 int _tsocket_address_bsd_from_sockaddr(TALLOC_CTX *mem_ctx,
 206                                        struct sockaddr *sa,
 207                                        size_t sa_socklen,
 208                                        struct tsocket_address **_addr,
 209                                        const char *location)
 210 {
 211         struct tsocket_address *addr;
 212         struct tsocket_address_bsd *bsda;
 213
 214         if (sa_socklen < sizeof(sa->sa_family)) {
 215                 errno = EINVAL;
 216                 return -1;
 217         }
 218
 219         switch (sa->sa_family) {
 220         case AF_UNIX:
 221                 if (sa_socklen > sizeof(struct sockaddr_un)) {
 222                         sa_socklen = sizeof(struct sockaddr_un);
 223                 }
 224                 break;
 225         case AF_INET:
 226                 if (sa_socklen < sizeof(struct sockaddr_in)) {
 227                         errno = EINVAL;
 228                         return -1;
 229                 }
 230                 sa_socklen = sizeof(struct sockaddr_in);
 231                 break;
 232 #ifdef HAVE_IPV6
 233         case AF_INET6:
 234                 if (sa_socklen < sizeof(struct sockaddr_in6)) {
 235                         errno = EINVAL;
 236                         return -1;
 237                 }
 238                 sa_socklen = sizeof(struct sockaddr_in6);
 239                 break;
 240 #endif
 241         default:
 242                 errno = EAFNOSUPPORT;
 243                 return -1;
 244         }
 245
 246         if (sa_socklen > sizeof(struct sockaddr_storage)) {
 247                 errno = EINVAL;
 248                 return -1;
 249         }
 250
 251         addr = tsocket_address_create(mem_ctx,
 252                                       &tsocket_address_bsd_ops,
 253                                       &bsda,
 254                                       struct tsocket_address_bsd,
 255                                       location);
 256         if (!addr) {
 257                 errno = ENOMEM;
 258                 return -1;
 259         }
 260
 261         ZERO_STRUCTP(bsda);
 262
 263         memcpy(&bsda->u.ss, sa, sa_socklen);
 264
 265         bsda->sa_socklen = sa_socklen;
 266
 267         *_addr = addr;
 268         return 0;
 269 }
 270
 271 ssize_t tsocket_address_bsd_sockaddr(const struct tsocket_address *addr,
 272                                      struct sockaddr *sa,
 273                                      size_t sa_socklen)
 274 {
 275         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 276                                            struct tsocket_address_bsd);
 277
 278         if (!bsda) {
 279                 errno = EINVAL;
 280                 return -1;
 281         }
 282
 283         if (sa_socklen < bsda->sa_socklen) {
 284                 errno = EINVAL;
 285                 return -1;
 286         }
 287
 288         if (sa_socklen > bsda->sa_socklen) {
 289                 memset(sa, 0, sa_socklen);
 290                 sa_socklen = bsda->sa_socklen;
 291         }
 292
 293         memcpy(sa, &bsda->u.ss, sa_socklen);
 294         return sa_socklen;
 295 }
 296
 297 bool tsocket_address_is_inet(const struct tsocket_address *addr, const char *fam)
 298 {
 299         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 300                                            struct tsocket_address_bsd);
 301
 302         if (!bsda) {
 303                 return false;
 304         }
 305
 306         switch (bsda->u.sa.sa_family) {
 307         case AF_INET:
 308                 if (strcasecmp(fam, "ip") == 0) {
 309                         return true;
 310                 }
 311
 312                 if (strcasecmp(fam, "ipv4") == 0) {
 313                         return true;
 314                 }
 315
 316                 return false;
 317 #ifdef HAVE_IPV6
 318         case AF_INET6:
 319                 if (strcasecmp(fam, "ip") == 0) {
 320                         return true;
 321                 }
 322
 323                 if (strcasecmp(fam, "ipv6") == 0) {
 324                         return true;
 325                 }
 326
 327                 return false;
 328 #endif
 329         }
 330
 331         return false;
 332 }
 333
 334 int _tsocket_address_inet_from_strings(TALLOC_CTX *mem_ctx,
 335                                        const char *fam,
 336                                        const char *addr,
 337                                        uint16_t port,
 338                                        struct tsocket_address **_addr,
 339                                        const char *location)
 340 {
 341         struct addrinfo hints;
 342         struct addrinfo *result = NULL;
 343         char port_str[6];
 344         int ret;
 345
 346         ZERO_STRUCT(hints);
 347         /*
 348          * we use SOCKET_STREAM here to get just one result
 349          * back from getaddrinfo().
 350          */
 351         hints.ai_socktype = SOCK_STREAM;
 352         hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
 353
 354         if (strcasecmp(fam, "ip") == 0) {
 355                 hints.ai_family = AF_UNSPEC;
 356                 if (!addr) {
 357 #ifdef HAVE_IPV6
 358                         addr = "::";
 359 #else
 360                         addr = "0.0.0.0";
 361 #endif
 362                 }
 363         } else if (strcasecmp(fam, "ipv4") == 0) {
 364                 hints.ai_family = AF_INET;
 365                 if (!addr) {
 366                         addr = "0.0.0.0";
 367                 }
 368 #ifdef HAVE_IPV6
 369         } else if (strcasecmp(fam, "ipv6") == 0) {
 370                 hints.ai_family = AF_INET6;
 371                 if (!addr) {
 372                         addr = "::";
 373                 }
 374 #endif
 375         } else {
 376                 errno = EAFNOSUPPORT;
 377                 return -1;
 378         }
 379
 380         snprintf(port_str, sizeof(port_str) - 1, "%u", port);
 381
 382         ret = getaddrinfo(addr, port_str, &hints, &result);
 383         if (ret != 0) {
 384                 switch (ret) {
 385                 case EAI_FAIL:
 386                         errno = EINVAL;
 387                         break;
 388                 }
 389                 ret = -1;
 390                 goto done;
 391         }
 392
 393         if (result->ai_socktype != SOCK_STREAM) {
 394                 errno = EINVAL;
 395                 ret = -1;
 396                 goto done;
 397         }
 398
 399         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 400                                                   result->ai_addr,
 401                                                   result->ai_addrlen,
 402                                                   _addr,
 403                                                   location);
 404
 405 done:
 406         if (result) {
 407                 freeaddrinfo(result);
 408         }
 409         return ret;
 410 }
 411
 412 char *tsocket_address_inet_addr_string(const struct tsocket_address *addr,
 413                                        TALLOC_CTX *mem_ctx)
 414 {
 415         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 416                                            struct tsocket_address_bsd);
 417         char addr_str[INET6_ADDRSTRLEN+1];
 418         const char *str;
 419
 420         if (!bsda) {
 421                 errno = EINVAL;
 422                 return NULL;
 423         }
 424
 425         switch (bsda->u.sa.sa_family) {
 426         case AF_INET:
 427                 str = inet_ntop(bsda->u.in.sin_family,
 428                                 &bsda->u.in.sin_addr,
 429                                 addr_str, sizeof(addr_str));
 430                 break;
 431 #ifdef HAVE_IPV6
 432         case AF_INET6:
 433                 str = inet_ntop(bsda->u.in6.sin6_family,
 434                                 &bsda->u.in6.sin6_addr,
 435                                 addr_str, sizeof(addr_str));
 436                 break;
 437 #endif
 438         default:
 439                 errno = EINVAL;
 440                 return NULL;
 441         }
 442
 443         if (!str) {
 444                 return NULL;
 445         }
 446
 447         return talloc_strdup(mem_ctx, str);
 448 }
 449
 450 uint16_t tsocket_address_inet_port(const struct tsocket_address *addr)
 451 {
 452         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 453                                            struct tsocket_address_bsd);
 454         uint16_t port = 0;
 455
 456         if (!bsda) {
 457                 errno = EINVAL;
 458                 return 0;
 459         }
 460
 461         switch (bsda->u.sa.sa_family) {
 462         case AF_INET:
 463                 port = ntohs(bsda->u.in.sin_port);
 464                 break;
 465 #ifdef HAVE_IPV6
 466         case AF_INET6:
 467                 port = ntohs(bsda->u.in6.sin6_port);
 468                 break;
 469 #endif
 470         default:
 471                 errno = EINVAL;
 472                 return 0;
 473         }
 474
 475         return port;
 476 }
 477
 478 int tsocket_address_inet_set_port(struct tsocket_address *addr,
 479                                   uint16_t port)
 480 {
 481         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 482                                            struct tsocket_address_bsd);
 483
 484         if (!bsda) {
 485                 errno = EINVAL;
 486                 return -1;
 487         }
 488
 489         switch (bsda->u.sa.sa_family) {
 490         case AF_INET:
 491                 bsda->u.in.sin_port = htons(port);
 492                 break;
 493 #ifdef HAVE_IPV6
 494         case AF_INET6:
 495                 bsda->u.in6.sin6_port = htons(port);
 496                 break;
 497 #endif
 498         default:
 499                 errno = EINVAL;
 500                 return -1;
 501         }
 502
 503         return 0;
 504 }
 505
 506 bool tsocket_address_is_unix(const struct tsocket_address *addr)
 507 {
 508         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 509                                            struct tsocket_address_bsd);
 510
 511         if (!bsda) {
 512                 return false;
 513         }
 514
 515         switch (bsda->u.sa.sa_family) {
 516         case AF_UNIX:
 517                 return true;
 518         }
 519
 520         return false;
 521 }
 522
 523 int _tsocket_address_unix_from_path(TALLOC_CTX *mem_ctx,
 524                                     const char *path,
 525                                     struct tsocket_address **_addr,
 526                                     const char *location)
 527 {
 528         struct sockaddr_un un;
 529         void *p = &un;
 530         int ret;
 531
 532         if (!path) {
 533                 path = "";
 534         }
 535
 536         if (strlen(path) > sizeof(un.sun_path)-1) {
 537                 errno = ENAMETOOLONG;
 538                 return -1;
 539         }
 540
 541         ZERO_STRUCT(un);
 542         un.sun_family = AF_UNIX;
 543         strncpy(un.sun_path, path, sizeof(un.sun_path)-1);
 544
 545         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 546                                                  (struct sockaddr *)p,
 547                                                  sizeof(un),
 548                                                  _addr,
 549                                                  location);
 550
 551         return ret;
 552 }
 553
 554 char *tsocket_address_unix_path(const struct tsocket_address *addr,
 555                                 TALLOC_CTX *mem_ctx)
 556 {
 557         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 558                                            struct tsocket_address_bsd);
 559         const char *str;
 560
 561         if (!bsda) {
 562                 errno = EINVAL;
 563                 return NULL;
 564         }
 565
 566         switch (bsda->u.sa.sa_family) {
 567         case AF_UNIX:
 568                 str = bsda->u.un.sun_path;
 569                 break;
 570         default:
 571                 errno = EINVAL;
 572                 return NULL;
 573         }
 574
 575         return talloc_strdup(mem_ctx, str);
 576 }
 577
 578 static char *tsocket_address_bsd_string(const struct tsocket_address *addr,
 579                                         TALLOC_CTX *mem_ctx)
 580 {
 581         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 582                                            struct tsocket_address_bsd);
 583         char *str;
 584         char *addr_str;
 585         const char *prefix = NULL;
 586         uint16_t port;
 587
 588         switch (bsda->u.sa.sa_family) {
 589         case AF_UNIX:
 590                 return talloc_asprintf(mem_ctx, "unix:%s",
 591                                        bsda->u.un.sun_path);
 592         case AF_INET:
 593                 prefix = "ipv4";
 594                 break;
 595 #ifdef HAVE_IPV6
 596         case AF_INET6:
 597                 prefix = "ipv6";
 598                 break;
 599 #endif
 600         default:
 601                 errno = EINVAL;
 602                 return NULL;
 603         }
 604
 605         addr_str = tsocket_address_inet_addr_string(addr, mem_ctx);
 606         if (!addr_str) {
 607                 return NULL;
 608         }
 609
 610         port = tsocket_address_inet_port(addr);
 611
 612         str = talloc_asprintf(mem_ctx, "%s:%s:%u",
 613                               prefix, addr_str, port);
 614         talloc_free(addr_str);
 615
 616         return str;
 617 }
 618
 619 static struct tsocket_address *tsocket_address_bsd_copy(const struct tsocket_address *addr,
 620                                                          TALLOC_CTX *mem_ctx,
 621                                                          const char *location)
 622 {
 623         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 624                                            struct tsocket_address_bsd);
 625         struct tsocket_address *copy;
 626         int ret;
 627
 628         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 629                                                  &bsda->u.sa,
 630                                                  bsda->sa_socklen,
 631                                                  &copy,
 632                                                  location);
 633         if (ret != 0) {
 634                 return NULL;
 635         }
 636
 637         return copy;
 638 }
 639
 640 static const struct tsocket_address_ops tsocket_address_bsd_ops = {
 641         .name           = "bsd",
 642         .string         = tsocket_address_bsd_string,
 643         .copy           = tsocket_address_bsd_copy,
 644 };
 645
 646 struct tdgram_bsd {
 647         int fd;
 648
 649         void *event_ptr;
 650         struct tevent_fd *fde;
 651
 652         void *readable_private;
 653         void (*readable_handler)(void *private_data);
 654         void *writeable_private;
 655         void (*writeable_handler)(void *private_data);
 656 };
 657
 658 static void tdgram_bsd_fde_handler(struct tevent_context *ev,
 659                                    struct tevent_fd *fde,
 660                                    uint16_t flags,
 661                                    void *private_data)
 662 {
 663         struct tdgram_bsd *bsds = talloc_get_type_abort(private_data,
 664                                   struct tdgram_bsd);
 665
 666         if (flags & TEVENT_FD_WRITE) {
 667                 bsds->writeable_handler(bsds->writeable_private);
 668                 return;
 669         }
 670         if (flags & TEVENT_FD_READ) {
 671                 if (!bsds->readable_handler) {
 672                         TEVENT_FD_NOT_READABLE(bsds->fde);
 673                         return;
 674                 }
 675                 bsds->readable_handler(bsds->readable_private);
 676                 return;
 677         }
 678 }
 679
 680 static int tdgram_bsd_set_readable_handler(struct tdgram_bsd *bsds,
 681                                            struct tevent_context *ev,
 682                                            void (*handler)(void *private_data),
 683                                            void *private_data)
 684 {
 685         if (ev == NULL) {
 686                 if (handler) {
 687                         errno = EINVAL;
 688                         return -1;
 689                 }
 690                 if (!bsds->readable_handler) {
 691                         return 0;
 692                 }
 693                 bsds->readable_handler = NULL;
 694                 bsds->readable_private = NULL;
 695
 696                 return 0;
 697         }
 698
 699         /* read and write must use the same tevent_context */
 700         if (bsds->event_ptr != ev) {
 701                 if (bsds->readable_handler || bsds->writeable_handler) {
 702                         errno = EINVAL;
 703                         return -1;
 704                 }
 705                 bsds->event_ptr = NULL;
 706                 TALLOC_FREE(bsds->fde);
 707         }
 708
 709         if (tevent_fd_get_flags(bsds->fde) == 0) {
 710                 TALLOC_FREE(bsds->fde);
 711
 712                 bsds->fde = tevent_add_fd(ev, bsds,
 713                                           bsds->fd, TEVENT_FD_READ,
 714                                           tdgram_bsd_fde_handler,
 715                                           bsds);
 716                 if (!bsds->fde) {
 717                         errno = ENOMEM;
 718                         return -1;
 719                 }
 720
 721                 /* cache the event context we're running on */
 722                 bsds->event_ptr = ev;
 723         } else if (!bsds->readable_handler) {
 724                 TEVENT_FD_READABLE(bsds->fde);
 725         }
 726
 727         bsds->readable_handler = handler;
 728         bsds->readable_private = private_data;
 729
 730         return 0;
 731 }
 732
 733 static int tdgram_bsd_set_writeable_handler(struct tdgram_bsd *bsds,
 734                                             struct tevent_context *ev,
 735                                             void (*handler)(void *private_data),
 736                                             void *private_data)
 737 {
 738         if (ev == NULL) {
 739                 if (handler) {
 740                         errno = EINVAL;
 741                         return -1;
 742                 }
 743                 if (!bsds->writeable_handler) {
 744                         return 0;
 745                 }
 746                 bsds->writeable_handler = NULL;
 747                 bsds->writeable_private = NULL;
 748                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
 749
 750                 return 0;
 751         }
 752
 753         /* read and write must use the same tevent_context */
 754         if (bsds->event_ptr != ev) {
 755                 if (bsds->readable_handler || bsds->writeable_handler) {
 756                         errno = EINVAL;
 757                         return -1;
 758                 }
 759                 bsds->event_ptr = NULL;
 760                 TALLOC_FREE(bsds->fde);
 761         }
 762
 763         if (tevent_fd_get_flags(bsds->fde) == 0) {
 764                 TALLOC_FREE(bsds->fde);
 765
 766                 bsds->fde = tevent_add_fd(ev, bsds,
 767                                           bsds->fd, TEVENT_FD_WRITE,
 768                                           tdgram_bsd_fde_handler,
 769                                           bsds);
 770                 if (!bsds->fde) {
 771                         errno = ENOMEM;
 772                         return -1;
 773                 }
 774
 775                 /* cache the event context we're running on */
 776                 bsds->event_ptr = ev;
 777         } else if (!bsds->writeable_handler) {
 778                 TEVENT_FD_WRITEABLE(bsds->fde);
 779         }
 780
 781         bsds->writeable_handler = handler;
 782         bsds->writeable_private = private_data;
 783
 784         return 0;
 785 }
 786
 787 struct tdgram_bsd_recvfrom_state {
 788         struct tdgram_context *dgram;
 789
 790         uint8_t *buf;
 791         size_t len;
 792         struct tsocket_address *src;
 793 };
 794
 795 static int tdgram_bsd_recvfrom_destructor(struct tdgram_bsd_recvfrom_state *state)
 796 {
 797         struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
 798                                   struct tdgram_bsd);
 799
 800         tdgram_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
 801
 802         return 0;
 803 }
 804
 805 static void tdgram_bsd_recvfrom_handler(void *private_data);
 806
 807 static struct tevent_req *tdgram_bsd_recvfrom_send(TALLOC_CTX *mem_ctx,
 808                                         struct tevent_context *ev,
 809                                         struct tdgram_context *dgram)
 810 {
 811         struct tevent_req *req;
 812         struct tdgram_bsd_recvfrom_state *state;
 813         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 814         int ret;
 815
 816         req = tevent_req_create(mem_ctx, &state,
 817                                 struct tdgram_bsd_recvfrom_state);
 818         if (!req) {
 819                 return NULL;
 820         }
 821
 822         state->dgram    = dgram;
 823         state->buf      = NULL;
 824         state->len      = 0;
 825         state->src      = NULL;
 826
 827         talloc_set_destructor(state, tdgram_bsd_recvfrom_destructor);
 828
 829         if (bsds->fd == -1) {
 830                 tevent_req_error(req, ENOTCONN);
 831                 goto post;
 832         }
 833
 834         /*
 835          * this is a fast path, not waiting for the
 836          * socket to become explicit readable gains
 837          * about 10%-20% performance in benchmark tests.
 838          */
 839         tdgram_bsd_recvfrom_handler(req);
 840         if (!tevent_req_is_in_progress(req)) {
 841                 goto post;
 842         }
 843
 844         ret = tdgram_bsd_set_readable_handler(bsds, ev,
 845                                               tdgram_bsd_recvfrom_handler,
 846                                               req);
 847         if (ret == -1) {
 848                 tevent_req_error(req, errno);
 849                 goto post;
 850         }
 851
 852         return req;
 853
 854  post:
 855         tevent_req_post(req, ev);
 856         return req;
 857 }
 858
 859 static void tdgram_bsd_recvfrom_handler(void *private_data)
 860 {
 861         struct tevent_req *req = talloc_get_type_abort(private_data,
 862                                  struct tevent_req);
 863         struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
 864                                         struct tdgram_bsd_recvfrom_state);
 865         struct tdgram_context *dgram = state->dgram;
 866         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 867         struct tsocket_address_bsd *bsda;
 868         ssize_t ret;
 869         int err;
 870         bool retry;
 871
 872         ret = tsocket_bsd_pending(bsds->fd);
 873         if (ret == 0) {
 874                 /* retry later */
 875                 return;
 876         }
 877         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
 878         if (retry) {
 879                 /* retry later */
 880                 return;
 881         }
 882         if (tevent_req_error(req, err)) {
 883                 return;
 884         }
 885
 886         state->buf = talloc_array(state, uint8_t, ret);
 887         if (tevent_req_nomem(state->buf, req)) {
 888                 return;
 889         }
 890         state->len = ret;
 891
 892         state->src = tsocket_address_create(state,
 893                                             &tsocket_address_bsd_ops,
 894                                             &bsda,
 895                                             struct tsocket_address_bsd,
 896                                             __location__ "bsd_recvfrom");
 897         if (tevent_req_nomem(state->src, req)) {
 898                 return;
 899         }
 900
 901         ZERO_STRUCTP(bsda);
 902         bsda->sa_socklen = sizeof(bsda->u.ss);
 903
 904         ret = recvfrom(bsds->fd, state->buf, state->len, 0,
 905                        &bsda->u.sa, &bsda->sa_socklen);
 906         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
 907         if (retry) {
 908                 /* retry later */
 909                 return;
 910         }
 911         if (tevent_req_error(req, err)) {
 912                 return;
 913         }
 914
 915         /*
 916          * Some systems (FreeBSD, see bug #7115) return too much
 917          * bytes in tsocket_bsd_pending()/ioctl(fd, FIONREAD, ...),
 918          * the return value includes some IP/UDP header bytes,
 919          * while recvfrom() just returns the payload.
 920          */
 921         state->buf = talloc_realloc(state, state->buf, uint8_t, ret);
 922         if (tevent_req_nomem(state->buf, req)) {
 923                 return;
 924         }
 925         state->len = ret;
 926
 927         tevent_req_done(req);
 928 }
 929
 930 static ssize_t tdgram_bsd_recvfrom_recv(struct tevent_req *req,
 931                                         int *perrno,
 932                                         TALLOC_CTX *mem_ctx,
 933                                         uint8_t **buf,
 934                                         struct tsocket_address **src)
 935 {
 936         struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
 937                                         struct tdgram_bsd_recvfrom_state);
 938         ssize_t ret;
 939
 940         ret = tsocket_simple_int_recv(req, perrno);
 941         if (ret == 0) {
 942                 *buf = talloc_move(mem_ctx, &state->buf);
 943                 ret = state->len;
 944                 if (src) {
 945                         *src = talloc_move(mem_ctx, &state->src);
 946                 }
 947         }
 948
 949         tevent_req_received(req);
 950         return ret;
 951 }
 952
 953 struct tdgram_bsd_sendto_state {
 954         struct tdgram_context *dgram;
 955
 956         const uint8_t *buf;
 957         size_t len;
 958         const struct tsocket_address *dst;
 959
 960         ssize_t ret;
 961 };
 962
 963 static int tdgram_bsd_sendto_destructor(struct tdgram_bsd_sendto_state *state)
 964 {
 965         struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
 966                                   struct tdgram_bsd);
 967
 968         tdgram_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
 969
 970         return 0;
 971 }
 972
 973 static void tdgram_bsd_sendto_handler(void *private_data);
 974
 975 static struct tevent_req *tdgram_bsd_sendto_send(TALLOC_CTX *mem_ctx,
 976                                                  struct tevent_context *ev,
 977                                                  struct tdgram_context *dgram,
 978                                                  const uint8_t *buf,
 979                                                  size_t len,
 980                                                  const struct tsocket_address *dst)
 981 {
 982         struct tevent_req *req;
 983         struct tdgram_bsd_sendto_state *state;
 984         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 985         int ret;
 986
 987         req = tevent_req_create(mem_ctx, &state,
 988                                 struct tdgram_bsd_sendto_state);
 989         if (!req) {
 990                 return NULL;
 991         }
 992
 993         state->dgram    = dgram;
 994         state->buf      = buf;
 995         state->len      = len;
 996         state->dst      = dst;
 997         state->ret      = -1;
 998
 999         talloc_set_destructor(state, tdgram_bsd_sendto_destructor);
1000
1001         if (bsds->fd == -1) {
1002                 tevent_req_error(req, ENOTCONN);
1003                 goto post;
1004         }
1005
1006         /*
1007          * this is a fast path, not waiting for the
1008          * socket to become explicit writeable gains
1009          * about 10%-20% performance in benchmark tests.
1010          */
1011         tdgram_bsd_sendto_handler(req);
1012         if (!tevent_req_is_in_progress(req)) {
1013                 goto post;
1014         }
1015
1016         ret = tdgram_bsd_set_writeable_handler(bsds, ev,
1017                                                tdgram_bsd_sendto_handler,
1018                                                req);
1019         if (ret == -1) {
1020                 tevent_req_error(req, errno);
1021                 goto post;
1022         }
1023
1024         return req;
1025
1026  post:
1027         tevent_req_post(req, ev);
1028         return req;
1029 }
1030
1031 static void tdgram_bsd_sendto_handler(void *private_data)
1032 {
1033         struct tevent_req *req = talloc_get_type_abort(private_data,
1034                                  struct tevent_req);
1035         struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1036                                         struct tdgram_bsd_sendto_state);
1037         struct tdgram_context *dgram = state->dgram;
1038         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1039         struct sockaddr *sa = NULL;
1040         socklen_t sa_socklen = 0;
1041         ssize_t ret;
1042         int err;
1043         bool retry;
1044
1045         if (state->dst) {
1046                 struct tsocket_address_bsd *bsda =
1047                         talloc_get_type(state->dst->private_data,
1048                         struct tsocket_address_bsd);
1049
1050                 sa = &bsda->u.sa;
1051                 sa_socklen = bsda->sa_socklen;
1052         }
1053
1054         ret = sendto(bsds->fd, state->buf, state->len, 0, sa, sa_socklen);
1055         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1056         if (retry) {
1057                 /* retry later */
1058                 return;
1059         }
1060         if (tevent_req_error(req, err)) {
1061                 return;
1062         }
1063
1064         state->ret = ret;
1065
1066         tevent_req_done(req);
1067 }
1068
1069 static ssize_t tdgram_bsd_sendto_recv(struct tevent_req *req, int *perrno)
1070 {
1071         struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1072                                         struct tdgram_bsd_sendto_state);
1073         ssize_t ret;
1074
1075         ret = tsocket_simple_int_recv(req, perrno);
1076         if (ret == 0) {
1077                 ret = state->ret;
1078         }
1079
1080         tevent_req_received(req);
1081         return ret;
1082 }
1083
1084 struct tdgram_bsd_disconnect_state {
1085         uint8_t __dummy;
1086 };
1087
1088 static struct tevent_req *tdgram_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1089                                                      struct tevent_context *ev,
1090                                                      struct tdgram_context *dgram)
1091 {
1092         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1093         struct tevent_req *req;
1094         struct tdgram_bsd_disconnect_state *state;
1095         int ret;
1096         int err;
1097         bool dummy;
1098
1099         req = tevent_req_create(mem_ctx, &state,
1100                                 struct tdgram_bsd_disconnect_state);
1101         if (req == NULL) {
1102                 return NULL;
1103         }
1104
1105         if (bsds->fd == -1) {
1106                 tevent_req_error(req, ENOTCONN);
1107                 goto post;
1108         }
1109
1110         ret = close(bsds->fd);
1111         bsds->fd = -1;
1112         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1113         if (tevent_req_error(req, err)) {
1114                 goto post;
1115         }
1116
1117         tevent_req_done(req);
1118 post:
1119         tevent_req_post(req, ev);
1120         return req;
1121 }
1122
1123 static int tdgram_bsd_disconnect_recv(struct tevent_req *req,
1124                                       int *perrno)
1125 {
1126         int ret;
1127
1128         ret = tsocket_simple_int_recv(req, perrno);
1129
1130         tevent_req_received(req);
1131         return ret;
1132 }
1133
1134 static const struct tdgram_context_ops tdgram_bsd_ops = {
1135         .name                   = "bsd",
1136
1137         .recvfrom_send          = tdgram_bsd_recvfrom_send,
1138         .recvfrom_recv          = tdgram_bsd_recvfrom_recv,
1139
1140         .sendto_send            = tdgram_bsd_sendto_send,
1141         .sendto_recv            = tdgram_bsd_sendto_recv,
1142
1143         .disconnect_send        = tdgram_bsd_disconnect_send,
1144         .disconnect_recv        = tdgram_bsd_disconnect_recv,
1145 };
1146
1147 static int tdgram_bsd_destructor(struct tdgram_bsd *bsds)
1148 {
1149         TALLOC_FREE(bsds->fde);
1150         if (bsds->fd != -1) {
1151                 close(bsds->fd);
1152                 bsds->fd = -1;
1153         }
1154         return 0;
1155 }
1156
1157 static int tdgram_bsd_dgram_socket(const struct tsocket_address *local,
1158                                    const struct tsocket_address *remote,
1159                                    bool broadcast,
1160                                    TALLOC_CTX *mem_ctx,
1161                                    struct tdgram_context **_dgram,
1162                                    const char *location)
1163 {
1164         struct tsocket_address_bsd *lbsda =
1165                 talloc_get_type_abort(local->private_data,
1166                 struct tsocket_address_bsd);
1167         struct tsocket_address_bsd *rbsda = NULL;
1168         struct tdgram_context *dgram;
1169         struct tdgram_bsd *bsds;
1170         int fd;
1171         int ret;
1172         bool do_bind = false;
1173         bool do_reuseaddr = false;
1174         bool do_ipv6only = false;
1175         bool is_inet = false;
1176         int sa_fam = lbsda->u.sa.sa_family;
1177
1178         if (remote) {
1179                 rbsda = talloc_get_type_abort(remote->private_data,
1180                         struct tsocket_address_bsd);
1181         }
1182
1183         switch (lbsda->u.sa.sa_family) {
1184         case AF_UNIX:
1185                 if (broadcast) {
1186                         errno = EINVAL;
1187                         return -1;
1188                 }
1189                 if (lbsda->u.un.sun_path[0] != 0) {
1190                         do_reuseaddr = true;
1191                         do_bind = true;
1192                 }
1193                 break;
1194         case AF_INET:
1195                 if (lbsda->u.in.sin_port != 0) {
1196                         do_reuseaddr = true;
1197                         do_bind = true;
1198                 }
1199                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
1200                         do_bind = true;
1201                 }
1202                 is_inet = true;
1203                 break;
1204 #ifdef HAVE_IPV6
1205         case AF_INET6:
1206                 if (lbsda->u.in6.sin6_port != 0) {
1207                         do_reuseaddr = true;
1208                         do_bind = true;
1209                 }
1210                 if (memcmp(&in6addr_any,
1211                            &lbsda->u.in6.sin6_addr,
1212                            sizeof(in6addr_any)) != 0) {
1213                         do_bind = true;
1214                 }
1215                 is_inet = true;
1216                 do_ipv6only = true;
1217                 break;
1218 #endif
1219         default:
1220                 errno = EINVAL;
1221                 return -1;
1222         }
1223
1224         if (!do_bind && is_inet && rbsda) {
1225                 sa_fam = rbsda->u.sa.sa_family;
1226                 switch (sa_fam) {
1227                 case AF_INET:
1228                         do_ipv6only = false;
1229                         break;
1230 #ifdef HAVE_IPV6
1231                 case AF_INET6:
1232                         do_ipv6only = true;
1233                         break;
1234 #endif
1235                 }
1236         }
1237
1238         fd = socket(sa_fam, SOCK_DGRAM, 0);
1239         if (fd < 0) {
1240                 return fd;
1241         }
1242
1243         fd = tsocket_bsd_common_prepare_fd(fd, true);
1244         if (fd < 0) {
1245                 return fd;
1246         }
1247
1248         dgram = tdgram_context_create(mem_ctx,
1249                                       &tdgram_bsd_ops,
1250                                       &bsds,
1251                                       struct tdgram_bsd,
1252                                       location);
1253         if (!dgram) {
1254                 int saved_errno = errno;
1255                 close(fd);
1256                 errno = saved_errno;
1257                 return -1;
1258         }
1259         ZERO_STRUCTP(bsds);
1260         bsds->fd = fd;
1261         talloc_set_destructor(bsds, tdgram_bsd_destructor);
1262
1263 #ifdef HAVE_IPV6
1264         if (do_ipv6only) {
1265                 int val = 1;
1266
1267                 ret = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
1268                                  (const void *)&val, sizeof(val));
1269                 if (ret == -1) {
1270                         int saved_errno = errno;
1271                         talloc_free(dgram);
1272                         errno = saved_errno;
1273                         return ret;
1274                 }
1275         }
1276 #endif
1277
1278         if (broadcast) {
1279                 int val = 1;
1280
1281                 ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
1282                                  (const void *)&val, sizeof(val));
1283                 if (ret == -1) {
1284                         int saved_errno = errno;
1285                         talloc_free(dgram);
1286                         errno = saved_errno;
1287                         return ret;
1288                 }
1289         }
1290
1291         if (do_reuseaddr) {
1292                 int val = 1;
1293
1294                 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1295                                  (const void *)&val, sizeof(val));
1296                 if (ret == -1) {
1297                         int saved_errno = errno;
1298                         talloc_free(dgram);
1299                         errno = saved_errno;
1300                         return ret;
1301                 }
1302         }
1303
1304         if (do_bind) {
1305                 ret = bind(fd, &lbsda->u.sa, lbsda->sa_socklen);
1306                 if (ret == -1) {
1307                         int saved_errno = errno;
1308                         talloc_free(dgram);
1309                         errno = saved_errno;
1310                         return ret;
1311                 }
1312         }
1313
1314         if (rbsda) {
1315                 if (rbsda->u.sa.sa_family != sa_fam) {
1316                         talloc_free(dgram);
1317                         errno = EINVAL;
1318                         return -1;
1319                 }
1320
1321                 ret = connect(fd, &rbsda->u.sa, rbsda->sa_socklen);
1322                 if (ret == -1) {
1323                         int saved_errno = errno;
1324                         talloc_free(dgram);
1325                         errno = saved_errno;
1326                         return ret;
1327                 }
1328         }
1329
1330         *_dgram = dgram;
1331         return 0;
1332 }
1333
1334 int _tdgram_inet_udp_socket(const struct tsocket_address *local,
1335                             const struct tsocket_address *remote,
1336                             TALLOC_CTX *mem_ctx,
1337                             struct tdgram_context **dgram,
1338                             const char *location)
1339 {
1340         struct tsocket_address_bsd *lbsda =
1341                 talloc_get_type_abort(local->private_data,
1342                 struct tsocket_address_bsd);
1343         int ret;
1344
1345         switch (lbsda->u.sa.sa_family) {
1346         case AF_INET:
1347                 break;
1348 #ifdef HAVE_IPV6
1349         case AF_INET6:
1350                 break;
1351 #endif
1352         default:
1353                 errno = EINVAL;
1354                 return -1;
1355         }
1356
1357         ret = tdgram_bsd_dgram_socket(local, remote, false,
1358                                       mem_ctx, dgram, location);
1359
1360         return ret;
1361 }
1362
1363 int _tdgram_unix_socket(const struct tsocket_address *local,
1364                         const struct tsocket_address *remote,
1365                         TALLOC_CTX *mem_ctx,
1366                         struct tdgram_context **dgram,
1367                         const char *location)
1368 {
1369         struct tsocket_address_bsd *lbsda =
1370                 talloc_get_type_abort(local->private_data,
1371                 struct tsocket_address_bsd);
1372         int ret;
1373
1374         switch (lbsda->u.sa.sa_family) {
1375         case AF_UNIX:
1376                 break;
1377         default:
1378                 errno = EINVAL;
1379                 return -1;
1380         }
1381
1382         ret = tdgram_bsd_dgram_socket(local, remote, false,
1383                                       mem_ctx, dgram, location);
1384
1385         return ret;
1386 }
1387
1388 struct tstream_bsd {
1389         int fd;
1390
1391         void *event_ptr;
1392         struct tevent_fd *fde;
1393
1394         void *readable_private;
1395         void (*readable_handler)(void *private_data);
1396         void *writeable_private;
1397         void (*writeable_handler)(void *private_data);
1398 };
1399
1400 static void tstream_bsd_fde_handler(struct tevent_context *ev,
1401                                     struct tevent_fd *fde,
1402                                     uint16_t flags,
1403                                     void *private_data)
1404 {
1405         struct tstream_bsd *bsds = talloc_get_type_abort(private_data,
1406                                    struct tstream_bsd);
1407
1408         if (flags & TEVENT_FD_WRITE) {
1409                 bsds->writeable_handler(bsds->writeable_private);
1410                 return;
1411         }
1412         if (flags & TEVENT_FD_READ) {
1413                 if (!bsds->readable_handler) {
1414                         if (bsds->writeable_handler) {
1415                                 bsds->writeable_handler(bsds->writeable_private);
1416                                 return;
1417                         }
1418                         TEVENT_FD_NOT_READABLE(bsds->fde);
1419                         return;
1420                 }
1421                 bsds->readable_handler(bsds->readable_private);
1422                 return;
1423         }
1424 }
1425
1426 static int tstream_bsd_set_readable_handler(struct tstream_bsd *bsds,
1427                                             struct tevent_context *ev,
1428                                             void (*handler)(void *private_data),
1429                                             void *private_data)
1430 {
1431         if (ev == NULL) {
1432                 if (handler) {
1433                         errno = EINVAL;
1434                         return -1;
1435                 }
1436                 if (!bsds->readable_handler) {
1437                         return 0;
1438                 }
1439                 bsds->readable_handler = NULL;
1440                 bsds->readable_private = NULL;
1441
1442                 return 0;
1443         }
1444
1445         /* read and write must use the same tevent_context */
1446         if (bsds->event_ptr != ev) {
1447                 if (bsds->readable_handler || bsds->writeable_handler) {
1448                         errno = EINVAL;
1449                         return -1;
1450                 }
1451                 bsds->event_ptr = NULL;
1452                 TALLOC_FREE(bsds->fde);
1453         }
1454
1455         if (tevent_fd_get_flags(bsds->fde) == 0) {
1456                 TALLOC_FREE(bsds->fde);
1457
1458                 bsds->fde = tevent_add_fd(ev, bsds,
1459                                           bsds->fd, TEVENT_FD_READ,
1460                                           tstream_bsd_fde_handler,
1461                                           bsds);
1462                 if (!bsds->fde) {
1463                         errno = ENOMEM;
1464                         return -1;
1465                 }
1466
1467                 /* cache the event context we're running on */
1468                 bsds->event_ptr = ev;
1469         } else if (!bsds->readable_handler) {
1470                 TEVENT_FD_READABLE(bsds->fde);
1471         }
1472
1473         bsds->readable_handler = handler;
1474         bsds->readable_private = private_data;
1475
1476         return 0;
1477 }
1478
1479 static int tstream_bsd_set_writeable_handler(struct tstream_bsd *bsds,
1480                                              struct tevent_context *ev,
1481                                              void (*handler)(void *private_data),
1482                                              void *private_data)
1483 {
1484         if (ev == NULL) {
1485                 if (handler) {
1486                         errno = EINVAL;
1487                         return -1;
1488                 }
1489                 if (!bsds->writeable_handler) {
1490                         return 0;
1491                 }
1492                 bsds->writeable_handler = NULL;
1493                 bsds->writeable_private = NULL;
1494                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
1495
1496                 return 0;
1497         }
1498
1499         /* read and write must use the same tevent_context */
1500         if (bsds->event_ptr != ev) {
1501                 if (bsds->readable_handler || bsds->writeable_handler) {
1502                         errno = EINVAL;
1503                         return -1;
1504                 }
1505                 bsds->event_ptr = NULL;
1506                 TALLOC_FREE(bsds->fde);
1507         }
1508
1509         if (tevent_fd_get_flags(bsds->fde) == 0) {
1510                 TALLOC_FREE(bsds->fde);
1511
1512                 bsds->fde = tevent_add_fd(ev, bsds,
1513                                           bsds->fd,
1514                                           TEVENT_FD_READ | TEVENT_FD_WRITE,
1515                                           tstream_bsd_fde_handler,
1516                                           bsds);
1517                 if (!bsds->fde) {
1518                         errno = ENOMEM;
1519                         return -1;
1520                 }
1521
1522                 /* cache the event context we're running on */
1523                 bsds->event_ptr = ev;
1524         } else if (!bsds->writeable_handler) {
1525                 uint16_t flags = tevent_fd_get_flags(bsds->fde);
1526                 flags |= TEVENT_FD_READ | TEVENT_FD_WRITE;
1527                 tevent_fd_set_flags(bsds->fde, flags);
1528         }
1529
1530         bsds->writeable_handler = handler;
1531         bsds->writeable_private = private_data;
1532
1533         return 0;
1534 }
1535
1536 static ssize_t tstream_bsd_pending_bytes(struct tstream_context *stream)
1537 {
1538         struct tstream_bsd *bsds = tstream_context_data(stream,
1539                                    struct tstream_bsd);
1540         ssize_t ret;
1541
1542         if (bsds->fd == -1) {
1543                 errno = ENOTCONN;
1544                 return -1;
1545         }
1546
1547         ret = tsocket_bsd_pending(bsds->fd);
1548
1549         return ret;
1550 }
1551
1552 struct tstream_bsd_readv_state {
1553         struct tstream_context *stream;
1554
1555         struct iovec *vector;
1556         size_t count;
1557
1558         int ret;
1559 };
1560
1561 static int tstream_bsd_readv_destructor(struct tstream_bsd_readv_state *state)
1562 {
1563         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1564                                    struct tstream_bsd);
1565
1566         tstream_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
1567
1568         return 0;
1569 }
1570
1571 static void tstream_bsd_readv_handler(void *private_data);
1572
1573 static struct tevent_req *tstream_bsd_readv_send(TALLOC_CTX *mem_ctx,
1574                                         struct tevent_context *ev,
1575                                         struct tstream_context *stream,
1576                                         struct iovec *vector,
1577                                         size_t count)
1578 {
1579         struct tevent_req *req;
1580         struct tstream_bsd_readv_state *state;
1581         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1582         int ret;
1583
1584         req = tevent_req_create(mem_ctx, &state,
1585                                 struct tstream_bsd_readv_state);
1586         if (!req) {
1587                 return NULL;
1588         }
1589
1590         state->stream   = stream;
1591         /* we make a copy of the vector so that we can modify it */
1592         state->vector   = talloc_array(state, struct iovec, count);
1593         if (tevent_req_nomem(state->vector, req)) {
1594                 goto post;
1595         }
1596         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1597         state->count    = count;
1598         state->ret      = 0;
1599
1600         talloc_set_destructor(state, tstream_bsd_readv_destructor);
1601
1602         if (bsds->fd == -1) {
1603                 tevent_req_error(req, ENOTCONN);
1604                 goto post;
1605         }
1606
1607         /*
1608          * this is a fast path, not waiting for the
1609          * socket to become explicit readable gains
1610          * about 10%-20% performance in benchmark tests.
1611          */
1612         tstream_bsd_readv_handler(req);
1613         if (!tevent_req_is_in_progress(req)) {
1614                 goto post;
1615         }
1616
1617         ret = tstream_bsd_set_readable_handler(bsds, ev,
1618                                               tstream_bsd_readv_handler,
1619                                               req);
1620         if (ret == -1) {
1621                 tevent_req_error(req, errno);
1622                 goto post;
1623         }
1624
1625         return req;
1626
1627  post:
1628         tevent_req_post(req, ev);
1629         return req;
1630 }
1631
1632 static void tstream_bsd_readv_handler(void *private_data)
1633 {
1634         struct tevent_req *req = talloc_get_type_abort(private_data,
1635                                  struct tevent_req);
1636         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1637                                         struct tstream_bsd_readv_state);
1638         struct tstream_context *stream = state->stream;
1639         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1640         int ret;
1641         int err;
1642         bool retry;
1643
1644         ret = readv(bsds->fd, state->vector, state->count);
1645         if (ret == 0) {
1646                 /* propagate end of file */
1647                 tevent_req_error(req, EPIPE);
1648                 return;
1649         }
1650         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1651         if (retry) {
1652                 /* retry later */
1653                 return;
1654         }
1655         if (tevent_req_error(req, err)) {
1656                 return;
1657         }
1658
1659         state->ret += ret;
1660
1661         while (ret > 0) {
1662                 if (ret < state->vector[0].iov_len) {
1663                         uint8_t *base;
1664                         base = (uint8_t *)state->vector[0].iov_base;
1665                         base += ret;
1666                         state->vector[0].iov_base = base;
1667                         state->vector[0].iov_len -= ret;
1668                         break;
1669                 }
1670                 ret -= state->vector[0].iov_len;
1671                 state->vector += 1;
1672                 state->count -= 1;
1673         }
1674
1675         /*
1676          * there're maybe some empty vectors at the end
1677          * which we need to skip, otherwise we would get
1678          * ret == 0 from the readv() call and return EPIPE
1679          */
1680         while (state->count > 0) {
1681                 if (state->vector[0].iov_len > 0) {
1682                         break;
1683                 }
1684                 state->vector += 1;
1685                 state->count -= 1;
1686         }
1687
1688         if (state->count > 0) {
1689                 /* we have more to read */
1690                 return;
1691         }
1692
1693         tevent_req_done(req);
1694 }
1695
1696 static int tstream_bsd_readv_recv(struct tevent_req *req,
1697                                   int *perrno)
1698 {
1699         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1700                                         struct tstream_bsd_readv_state);
1701         int ret;
1702
1703         ret = tsocket_simple_int_recv(req, perrno);
1704         if (ret == 0) {
1705                 ret = state->ret;
1706         }
1707
1708         tevent_req_received(req);
1709         return ret;
1710 }
1711
1712 struct tstream_bsd_writev_state {
1713         struct tstream_context *stream;
1714
1715         struct iovec *vector;
1716         size_t count;
1717
1718         int ret;
1719 };
1720
1721 static int tstream_bsd_writev_destructor(struct tstream_bsd_writev_state *state)
1722 {
1723         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1724                                   struct tstream_bsd);
1725
1726         tstream_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
1727
1728         return 0;
1729 }
1730
1731 static void tstream_bsd_writev_handler(void *private_data);
1732
1733 static struct tevent_req *tstream_bsd_writev_send(TALLOC_CTX *mem_ctx,
1734                                                  struct tevent_context *ev,
1735                                                  struct tstream_context *stream,
1736                                                  const struct iovec *vector,
1737                                                  size_t count)
1738 {
1739         struct tevent_req *req;
1740         struct tstream_bsd_writev_state *state;
1741         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1742         int ret;
1743
1744         req = tevent_req_create(mem_ctx, &state,
1745                                 struct tstream_bsd_writev_state);
1746         if (!req) {
1747                 return NULL;
1748         }
1749
1750         state->stream   = stream;
1751         /* we make a copy of the vector so that we can modify it */
1752         state->vector   = talloc_array(state, struct iovec, count);
1753         if (tevent_req_nomem(state->vector, req)) {
1754                 goto post;
1755         }
1756         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1757         state->count    = count;
1758         state->ret      = 0;
1759
1760         talloc_set_destructor(state, tstream_bsd_writev_destructor);
1761
1762         if (bsds->fd == -1) {
1763                 tevent_req_error(req, ENOTCONN);
1764                 goto post;
1765         }
1766
1767         /*
1768          * this is a fast path, not waiting for the
1769          * socket to become explicit writeable gains
1770          * about 10%-20% performance in benchmark tests.
1771          */
1772         tstream_bsd_writev_handler(req);
1773         if (!tevent_req_is_in_progress(req)) {
1774                 goto post;
1775         }
1776
1777         ret = tstream_bsd_set_writeable_handler(bsds, ev,
1778                                                tstream_bsd_writev_handler,
1779                                                req);
1780         if (ret == -1) {
1781                 tevent_req_error(req, errno);
1782                 goto post;
1783         }
1784
1785         return req;
1786
1787  post:
1788         tevent_req_post(req, ev);
1789         return req;
1790 }
1791
1792 static void tstream_bsd_writev_handler(void *private_data)
1793 {
1794         struct tevent_req *req = talloc_get_type_abort(private_data,
1795                                  struct tevent_req);
1796         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1797                                         struct tstream_bsd_writev_state);
1798         struct tstream_context *stream = state->stream;
1799         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1800         ssize_t ret;
1801         int err;
1802         bool retry;
1803
1804         ret = writev(bsds->fd, state->vector, state->count);
1805         if (ret == 0) {
1806                 /* propagate end of file */
1807                 tevent_req_error(req, EPIPE);
1808                 return;
1809         }
1810         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1811         if (retry) {
1812                 /* retry later */
1813                 return;
1814         }
1815         if (tevent_req_error(req, err)) {
1816                 return;
1817         }
1818
1819         state->ret += ret;
1820
1821         while (ret > 0) {
1822                 if (ret < state->vector[0].iov_len) {
1823                         uint8_t *base;
1824                         base = (uint8_t *)state->vector[0].iov_base;
1825                         base += ret;
1826                         state->vector[0].iov_base = base;
1827                         state->vector[0].iov_len -= ret;
1828                         break;
1829                 }
1830                 ret -= state->vector[0].iov_len;
1831                 state->vector += 1;
1832                 state->count -= 1;
1833         }
1834
1835         /*
1836          * there're maybe some empty vectors at the end
1837          * which we need to skip, otherwise we would get
1838          * ret == 0 from the writev() call and return EPIPE
1839          */
1840         while (state->count > 0) {
1841                 if (state->vector[0].iov_len > 0) {
1842                         break;
1843                 }
1844                 state->vector += 1;
1845                 state->count -= 1;
1846         }
1847
1848         if (state->count > 0) {
1849                 /* we have more to read */
1850                 return;
1851         }
1852
1853         tevent_req_done(req);
1854 }
1855
1856 static int tstream_bsd_writev_recv(struct tevent_req *req, int *perrno)
1857 {
1858         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1859                                         struct tstream_bsd_writev_state);
1860         int ret;
1861
1862         ret = tsocket_simple_int_recv(req, perrno);
1863         if (ret == 0) {
1864                 ret = state->ret;
1865         }
1866
1867         tevent_req_received(req);
1868         return ret;
1869 }
1870
1871 struct tstream_bsd_disconnect_state {
1872         void *__dummy;
1873 };
1874
1875 static struct tevent_req *tstream_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1876                                                      struct tevent_context *ev,
1877                                                      struct tstream_context *stream)
1878 {
1879         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1880         struct tevent_req *req;
1881         struct tstream_bsd_disconnect_state *state;
1882         int ret;
1883         int err;
1884         bool dummy;
1885
1886         req = tevent_req_create(mem_ctx, &state,
1887                                 struct tstream_bsd_disconnect_state);
1888         if (req == NULL) {
1889                 return NULL;
1890         }
1891
1892         if (bsds->fd == -1) {
1893                 tevent_req_error(req, ENOTCONN);
1894                 goto post;
1895         }
1896
1897         ret = close(bsds->fd);
1898         bsds->fd = -1;
1899         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1900         if (tevent_req_error(req, err)) {
1901                 goto post;
1902         }
1903
1904         tevent_req_done(req);
1905 post:
1906         tevent_req_post(req, ev);
1907         return req;
1908 }
1909
1910 static int tstream_bsd_disconnect_recv(struct tevent_req *req,
1911                                       int *perrno)
1912 {
1913         int ret;
1914
1915         ret = tsocket_simple_int_recv(req, perrno);
1916
1917         tevent_req_received(req);
1918         return ret;
1919 }
1920
1921 static const struct tstream_context_ops tstream_bsd_ops = {
1922         .name                   = "bsd",
1923
1924         .pending_bytes          = tstream_bsd_pending_bytes,
1925
1926         .readv_send             = tstream_bsd_readv_send,
1927         .readv_recv             = tstream_bsd_readv_recv,
1928
1929         .writev_send            = tstream_bsd_writev_send,
1930         .writev_recv            = tstream_bsd_writev_recv,
1931
1932         .disconnect_send        = tstream_bsd_disconnect_send,
1933         .disconnect_recv        = tstream_bsd_disconnect_recv,
1934 };
1935
1936 static int tstream_bsd_destructor(struct tstream_bsd *bsds)
1937 {
1938         TALLOC_FREE(bsds->fde);
1939         if (bsds->fd != -1) {
1940                 close(bsds->fd);
1941                 bsds->fd = -1;
1942         }
1943         return 0;
1944 }
1945
1946 int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx,
1947                                  int fd,
1948                                  struct tstream_context **_stream,
1949                                  const char *location)
1950 {
1951         struct tstream_context *stream;
1952         struct tstream_bsd *bsds;
1953
1954         stream = tstream_context_create(mem_ctx,
1955                                         &tstream_bsd_ops,
1956                                         &bsds,
1957                                         struct tstream_bsd,
1958                                         location);
1959         if (!stream) {
1960                 return -1;
1961         }
1962         ZERO_STRUCTP(bsds);
1963         bsds->fd = fd;
1964         talloc_set_destructor(bsds, tstream_bsd_destructor);
1965
1966         *_stream = stream;
1967         return 0;
1968 }
1969
1970 struct tstream_bsd_connect_state {
1971         int fd;
1972         struct tevent_fd *fde;
1973         struct tstream_conext *stream;
1974 };
1975
1976 static int tstream_bsd_connect_destructor(struct tstream_bsd_connect_state *state)
1977 {
1978         TALLOC_FREE(state->fde);
1979         if (state->fd != -1) {
1980                 close(state->fd);
1981                 state->fd = -1;
1982         }
1983
1984         return 0;
1985 }
1986
1987 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
1988                                             struct tevent_fd *fde,
1989                                             uint16_t flags,
1990                                             void *private_data);
1991
1992 static struct tevent_req * tstream_bsd_connect_send(TALLOC_CTX *mem_ctx,
1993                                         struct tevent_context *ev,
1994                                         int sys_errno,
1995                                         const struct tsocket_address *local,
1996                                         const struct tsocket_address *remote)
1997 {
1998         struct tevent_req *req;
1999         struct tstream_bsd_connect_state *state;
2000         struct tsocket_address_bsd *lbsda =
2001                 talloc_get_type_abort(local->private_data,
2002                 struct tsocket_address_bsd);
2003         struct tsocket_address_bsd *rbsda =
2004                 talloc_get_type_abort(remote->private_data,
2005                 struct tsocket_address_bsd);
2006         int ret;
2007         int err;
2008         bool retry;
2009         bool do_bind = false;
2010         bool do_reuseaddr = false;
2011         bool do_ipv6only = false;
2012         bool is_inet = false;
2013         int sa_fam = lbsda->u.sa.sa_family;
2014
2015         req = tevent_req_create(mem_ctx, &state,
2016                                 struct tstream_bsd_connect_state);
2017         if (!req) {
2018                 return NULL;
2019         }
2020         state->fd = -1;
2021         state->fde = NULL;
2022
2023         talloc_set_destructor(state, tstream_bsd_connect_destructor);
2024
2025         /* give the wrappers a chance to report an error */
2026         if (sys_errno != 0) {
2027                 tevent_req_error(req, sys_errno);
2028                 goto post;
2029         }
2030
2031         switch (lbsda->u.sa.sa_family) {
2032         case AF_UNIX:
2033                 if (lbsda->u.un.sun_path[0] != 0) {
2034                         do_reuseaddr = true;
2035                         do_bind = true;
2036                 }
2037                 break;
2038         case AF_INET:
2039                 if (lbsda->u.in.sin_port != 0) {
2040                         do_reuseaddr = true;
2041                         do_bind = true;
2042                 }
2043                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
2044                         do_bind = true;
2045                 }
2046                 is_inet = true;
2047                 break;
2048 #ifdef HAVE_IPV6
2049         case AF_INET6:
2050                 if (lbsda->u.in6.sin6_port != 0) {
2051                         do_reuseaddr = true;
2052                         do_bind = true;
2053                 }
2054                 if (memcmp(&in6addr_any,
2055                            &lbsda->u.in6.sin6_addr,
2056                            sizeof(in6addr_any)) != 0) {
2057                         do_bind = true;
2058                 }
2059                 is_inet = true;
2060                 do_ipv6only = true;
2061                 break;
2062 #endif
2063         default:
2064                 tevent_req_error(req, EINVAL);
2065                 goto post;
2066         }
2067
2068         if (!do_bind && is_inet) {
2069                 sa_fam = rbsda->u.sa.sa_family;
2070                 switch (sa_fam) {
2071                 case AF_INET:
2072                         do_ipv6only = false;
2073                         break;
2074 #ifdef HAVE_IPV6
2075                 case AF_INET6:
2076                         do_ipv6only = true;
2077                         break;
2078 #endif
2079                 }
2080         }
2081
2082         state->fd = socket(sa_fam, SOCK_STREAM, 0);
2083         if (state->fd == -1) {
2084                 tevent_req_error(req, errno);
2085                 goto post;
2086         }
2087
2088         state->fd = tsocket_bsd_common_prepare_fd(state->fd, true);
2089         if (state->fd == -1) {
2090                 tevent_req_error(req, errno);
2091                 goto post;
2092         }
2093
2094 #ifdef HAVE_IPV6
2095         if (do_ipv6only) {
2096                 int val = 1;
2097
2098                 ret = setsockopt(state->fd, IPPROTO_IPV6, IPV6_V6ONLY,
2099                                  (const void *)&val, sizeof(val));
2100                 if (ret == -1) {
2101                         tevent_req_error(req, errno);
2102                         goto post;
2103                 }
2104         }
2105 #endif
2106
2107         if (do_reuseaddr) {
2108                 int val = 1;
2109
2110                 ret = setsockopt(state->fd, SOL_SOCKET, SO_REUSEADDR,
2111                                  (const void *)&val, sizeof(val));
2112                 if (ret == -1) {
2113                         tevent_req_error(req, errno);
2114                         goto post;
2115                 }
2116         }
2117
2118         if (do_bind) {
2119                 ret = bind(state->fd, &lbsda->u.sa, lbsda->sa_socklen);
2120                 if (ret == -1) {
2121                         tevent_req_error(req, errno);
2122                         goto post;
2123                 }
2124         }
2125
2126         if (rbsda->u.sa.sa_family != sa_fam) {
2127                 tevent_req_error(req, EINVAL);
2128                 goto post;
2129         }
2130
2131         ret = connect(state->fd, &rbsda->u.sa, rbsda->sa_socklen);
2132         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2133         if (retry) {
2134                 /* retry later */
2135                 goto async;
2136         }
2137         if (tevent_req_error(req, err)) {
2138                 goto post;
2139         }
2140
2141         tevent_req_done(req);
2142         goto post;
2143
2144  async:
2145         state->fde = tevent_add_fd(ev, state,
2146                                    state->fd,
2147                                    TEVENT_FD_READ | TEVENT_FD_WRITE,
2148                                    tstream_bsd_connect_fde_handler,
2149                                    req);
2150         if (tevent_req_nomem(state->fde, req)) {
2151                 goto post;
2152         }
2153
2154         return req;
2155
2156  post:
2157         tevent_req_post(req, ev);
2158         return req;
2159 }
2160
2161 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2162                                             struct tevent_fd *fde,
2163                                             uint16_t flags,
2164                                             void *private_data)
2165 {
2166         struct tevent_req *req = talloc_get_type_abort(private_data,
2167                                  struct tevent_req);
2168         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2169                                         struct tstream_bsd_connect_state);
2170         int ret;
2171         int error=0;
2172         socklen_t len = sizeof(error);
2173         int err;
2174         bool retry;
2175
2176         ret = getsockopt(state->fd, SOL_SOCKET, SO_ERROR, &error, &len);
2177         if (ret == 0) {
2178                 if (error != 0) {
2179                         errno = error;
2180                         ret = -1;
2181                 }
2182         }
2183         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2184         if (retry) {
2185                 /* retry later */
2186                 return;
2187         }
2188         if (tevent_req_error(req, err)) {
2189                 return;
2190         }
2191
2192         tevent_req_done(req);
2193 }
2194
2195 static int tstream_bsd_connect_recv(struct tevent_req *req,
2196                                     int *perrno,
2197                                     TALLOC_CTX *mem_ctx,
2198                                     struct tstream_context **stream,
2199                                     const char *location)
2200 {
2201         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2202                                         struct tstream_bsd_connect_state);
2203         int ret;
2204
2205         ret = tsocket_simple_int_recv(req, perrno);
2206         if (ret == 0) {
2207                 ret = _tstream_bsd_existing_socket(mem_ctx,
2208                                                    state->fd,
2209                                                    stream,
2210                                                    location);
2211                 if (ret == -1) {
2212                         *perrno = errno;
2213                         goto done;
2214                 }
2215                 TALLOC_FREE(state->fde);
2216                 state->fd = -1;
2217         }
2218
2219 done:
2220         tevent_req_received(req);
2221         return ret;
2222 }
2223
2224 struct tevent_req * tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx,
2225                                         struct tevent_context *ev,
2226                                         const struct tsocket_address *local,
2227                                         const struct tsocket_address *remote)
2228 {
2229         struct tsocket_address_bsd *lbsda =
2230                 talloc_get_type_abort(local->private_data,
2231                 struct tsocket_address_bsd);
2232         struct tevent_req *req;
2233         int sys_errno = 0;
2234
2235         switch (lbsda->u.sa.sa_family) {
2236         case AF_INET:
2237                 break;
2238 #ifdef HAVE_IPV6
2239         case AF_INET6:
2240                 break;
2241 #endif
2242         default:
2243                 sys_errno = EINVAL;
2244                 break;
2245         }
2246
2247         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2248
2249         return req;
2250 }
2251
2252 int _tstream_inet_tcp_connect_recv(struct tevent_req *req,
2253                                    int *perrno,
2254                                    TALLOC_CTX *mem_ctx,
2255                                    struct tstream_context **stream,
2256                                    const char *location)
2257 {
2258         return tstream_bsd_connect_recv(req, perrno, mem_ctx, stream, location);
2259 }
2260
2261 struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx,
2262                                         struct tevent_context *ev,
2263                                         const struct tsocket_address *local,
2264                                         const struct tsocket_address *remote)
2265 {
2266         struct tsocket_address_bsd *lbsda =
2267                 talloc_get_type_abort(local->private_data,
2268                 struct tsocket_address_bsd);
2269         struct tevent_req *req;
2270         int sys_errno = 0;
2271
2272         switch (lbsda->u.sa.sa_family) {
2273         case AF_UNIX:
2274                 break;
2275         default:
2276                 sys_errno = EINVAL;
2277                 break;
2278         }
2279
2280         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2281
2282         return req;
2283 }
2284
2285 int _tstream_unix_connect_recv(struct tevent_req *req,
2286                                       int *perrno,
2287                                       TALLOC_CTX *mem_ctx,
2288                                       struct tstream_context **stream,
2289                                       const char *location)
2290 {
2291         return tstream_bsd_connect_recv(req, perrno, mem_ctx, stream, location);
2292 }
2293
2294 int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1,
2295                              struct tstream_context **_stream1,
2296                              TALLOC_CTX *mem_ctx2,
2297                              struct tstream_context **_stream2,
2298                              const char *location)
2299 {
2300         int ret;
2301         int fds[2];
2302         int fd1;
2303         int fd2;
2304         struct tstream_context *stream1 = NULL;
2305         struct tstream_context *stream2 = NULL;
2306
2307         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
2308         if (ret == -1) {
2309                 return -1;
2310         }
2311         fd1 = fds[0];
2312         fd2 = fds[1];
2313
2314         fd1 = tsocket_bsd_common_prepare_fd(fd1, true);
2315         if (fd1 == -1) {
2316                 int sys_errno = errno;
2317                 close(fd2);
2318                 errno = sys_errno;
2319                 return -1;
2320         }
2321
2322         fd2 = tsocket_bsd_common_prepare_fd(fd2, true);
2323         if (fd2 == -1) {
2324                 int sys_errno = errno;
2325                 close(fd1);
2326                 errno = sys_errno;
2327                 return -1;
2328         }
2329
2330         ret = _tstream_bsd_existing_socket(mem_ctx1,
2331                                            fd1,
2332                                            &stream1,
2333                                            location);
2334         if (ret == -1) {
2335                 int sys_errno = errno;
2336                 close(fd1);
2337                 close(fd2);
2338                 errno = sys_errno;
2339                 return -1;
2340         }
2341
2342         ret = _tstream_bsd_existing_socket(mem_ctx2,
2343                                            fd2,
2344                                            &stream2,
2345                                            location);
2346         if (ret == -1) {
2347                 int sys_errno = errno;
2348                 talloc_free(stream1);
2349                 close(fd2);
2350                 errno = sys_errno;
2351                 return -1;
2352         }
2353
2354         *_stream1 = stream1;
2355         *_stream2 = stream2;
2356         return 0;
2357 }
2358