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         TALLOC_FREE(bsds->fde);
1111         ret = close(bsds->fd);
1112         bsds->fd = -1;
1113         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1114         if (tevent_req_error(req, err)) {
1115                 goto post;
1116         }
1117
1118         tevent_req_done(req);
1119 post:
1120         tevent_req_post(req, ev);
1121         return req;
1122 }
1123
1124 static int tdgram_bsd_disconnect_recv(struct tevent_req *req,
1125                                       int *perrno)
1126 {
1127         int ret;
1128
1129         ret = tsocket_simple_int_recv(req, perrno);
1130
1131         tevent_req_received(req);
1132         return ret;
1133 }
1134
1135 static const struct tdgram_context_ops tdgram_bsd_ops = {
1136         .name                   = "bsd",
1137
1138         .recvfrom_send          = tdgram_bsd_recvfrom_send,
1139         .recvfrom_recv          = tdgram_bsd_recvfrom_recv,
1140
1141         .sendto_send            = tdgram_bsd_sendto_send,
1142         .sendto_recv            = tdgram_bsd_sendto_recv,
1143
1144         .disconnect_send        = tdgram_bsd_disconnect_send,
1145         .disconnect_recv        = tdgram_bsd_disconnect_recv,
1146 };
1147
1148 static int tdgram_bsd_destructor(struct tdgram_bsd *bsds)
1149 {
1150         TALLOC_FREE(bsds->fde);
1151         if (bsds->fd != -1) {
1152                 close(bsds->fd);
1153                 bsds->fd = -1;
1154         }
1155         return 0;
1156 }
1157
1158 static int tdgram_bsd_dgram_socket(const struct tsocket_address *local,
1159                                    const struct tsocket_address *remote,
1160                                    bool broadcast,
1161                                    TALLOC_CTX *mem_ctx,
1162                                    struct tdgram_context **_dgram,
1163                                    const char *location)
1164 {
1165         struct tsocket_address_bsd *lbsda =
1166                 talloc_get_type_abort(local->private_data,
1167                 struct tsocket_address_bsd);
1168         struct tsocket_address_bsd *rbsda = NULL;
1169         struct tdgram_context *dgram;
1170         struct tdgram_bsd *bsds;
1171         int fd;
1172         int ret;
1173         bool do_bind = false;
1174         bool do_reuseaddr = false;
1175         bool do_ipv6only = false;
1176         bool is_inet = false;
1177         int sa_fam = lbsda->u.sa.sa_family;
1178
1179         if (remote) {
1180                 rbsda = talloc_get_type_abort(remote->private_data,
1181                         struct tsocket_address_bsd);
1182         }
1183
1184         switch (lbsda->u.sa.sa_family) {
1185         case AF_UNIX:
1186                 if (broadcast) {
1187                         errno = EINVAL;
1188                         return -1;
1189                 }
1190                 if (lbsda->u.un.sun_path[0] != 0) {
1191                         do_reuseaddr = true;
1192                         do_bind = true;
1193                 }
1194                 break;
1195         case AF_INET:
1196                 if (lbsda->u.in.sin_port != 0) {
1197                         do_reuseaddr = true;
1198                         do_bind = true;
1199                 }
1200                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
1201                         do_bind = true;
1202                 }
1203                 is_inet = true;
1204                 break;
1205 #ifdef HAVE_IPV6
1206         case AF_INET6:
1207                 if (lbsda->u.in6.sin6_port != 0) {
1208                         do_reuseaddr = true;
1209                         do_bind = true;
1210                 }
1211                 if (memcmp(&in6addr_any,
1212                            &lbsda->u.in6.sin6_addr,
1213                            sizeof(in6addr_any)) != 0) {
1214                         do_bind = true;
1215                 }
1216                 is_inet = true;
1217                 do_ipv6only = true;
1218                 break;
1219 #endif
1220         default:
1221                 errno = EINVAL;
1222                 return -1;
1223         }
1224
1225         if (!do_bind && is_inet && rbsda) {
1226                 sa_fam = rbsda->u.sa.sa_family;
1227                 switch (sa_fam) {
1228                 case AF_INET:
1229                         do_ipv6only = false;
1230                         break;
1231 #ifdef HAVE_IPV6
1232                 case AF_INET6:
1233                         do_ipv6only = true;
1234                         break;
1235 #endif
1236                 }
1237         }
1238
1239         fd = socket(sa_fam, SOCK_DGRAM, 0);
1240         if (fd < 0) {
1241                 return -1;
1242         }
1243
1244         fd = tsocket_bsd_common_prepare_fd(fd, true);
1245         if (fd < 0) {
1246                 return -1;
1247         }
1248
1249         dgram = tdgram_context_create(mem_ctx,
1250                                       &tdgram_bsd_ops,
1251                                       &bsds,
1252                                       struct tdgram_bsd,
1253                                       location);
1254         if (!dgram) {
1255                 int saved_errno = errno;
1256                 close(fd);
1257                 errno = saved_errno;
1258                 return -1;
1259         }
1260         ZERO_STRUCTP(bsds);
1261         bsds->fd = fd;
1262         talloc_set_destructor(bsds, tdgram_bsd_destructor);
1263
1264 #ifdef HAVE_IPV6
1265         if (do_ipv6only) {
1266                 int val = 1;
1267
1268                 ret = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
1269                                  (const void *)&val, sizeof(val));
1270                 if (ret == -1) {
1271                         int saved_errno = errno;
1272                         talloc_free(dgram);
1273                         errno = saved_errno;
1274                         return -1;
1275                 }
1276         }
1277 #endif
1278
1279         if (broadcast) {
1280                 int val = 1;
1281
1282                 ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
1283                                  (const void *)&val, sizeof(val));
1284                 if (ret == -1) {
1285                         int saved_errno = errno;
1286                         talloc_free(dgram);
1287                         errno = saved_errno;
1288                         return -1;
1289                 }
1290         }
1291
1292         if (do_reuseaddr) {
1293                 int val = 1;
1294
1295                 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1296                                  (const void *)&val, sizeof(val));
1297                 if (ret == -1) {
1298                         int saved_errno = errno;
1299                         talloc_free(dgram);
1300                         errno = saved_errno;
1301                         return -1;
1302                 }
1303         }
1304
1305         if (do_bind) {
1306                 ret = bind(fd, &lbsda->u.sa, lbsda->sa_socklen);
1307                 if (ret == -1) {
1308                         int saved_errno = errno;
1309                         talloc_free(dgram);
1310                         errno = saved_errno;
1311                         return -1;
1312                 }
1313         }
1314
1315         if (rbsda) {
1316                 if (rbsda->u.sa.sa_family != sa_fam) {
1317                         talloc_free(dgram);
1318                         errno = EINVAL;
1319                         return -1;
1320                 }
1321
1322                 ret = connect(fd, &rbsda->u.sa, rbsda->sa_socklen);
1323                 if (ret == -1) {
1324                         int saved_errno = errno;
1325                         talloc_free(dgram);
1326                         errno = saved_errno;
1327                         return -1;
1328                 }
1329         }
1330
1331         *_dgram = dgram;
1332         return 0;
1333 }
1334
1335 int _tdgram_inet_udp_socket(const struct tsocket_address *local,
1336                             const struct tsocket_address *remote,
1337                             TALLOC_CTX *mem_ctx,
1338                             struct tdgram_context **dgram,
1339                             const char *location)
1340 {
1341         struct tsocket_address_bsd *lbsda =
1342                 talloc_get_type_abort(local->private_data,
1343                 struct tsocket_address_bsd);
1344         int ret;
1345
1346         switch (lbsda->u.sa.sa_family) {
1347         case AF_INET:
1348                 break;
1349 #ifdef HAVE_IPV6
1350         case AF_INET6:
1351                 break;
1352 #endif
1353         default:
1354                 errno = EINVAL;
1355                 return -1;
1356         }
1357
1358         ret = tdgram_bsd_dgram_socket(local, remote, false,
1359                                       mem_ctx, dgram, location);
1360
1361         return ret;
1362 }
1363
1364 int _tdgram_unix_socket(const struct tsocket_address *local,
1365                         const struct tsocket_address *remote,
1366                         TALLOC_CTX *mem_ctx,
1367                         struct tdgram_context **dgram,
1368                         const char *location)
1369 {
1370         struct tsocket_address_bsd *lbsda =
1371                 talloc_get_type_abort(local->private_data,
1372                 struct tsocket_address_bsd);
1373         int ret;
1374
1375         switch (lbsda->u.sa.sa_family) {
1376         case AF_UNIX:
1377                 break;
1378         default:
1379                 errno = EINVAL;
1380                 return -1;
1381         }
1382
1383         ret = tdgram_bsd_dgram_socket(local, remote, false,
1384                                       mem_ctx, dgram, location);
1385
1386         return ret;
1387 }
1388
1389 struct tstream_bsd {
1390         int fd;
1391
1392         void *event_ptr;
1393         struct tevent_fd *fde;
1394
1395         void *readable_private;
1396         void (*readable_handler)(void *private_data);
1397         void *writeable_private;
1398         void (*writeable_handler)(void *private_data);
1399 };
1400
1401 static void tstream_bsd_fde_handler(struct tevent_context *ev,
1402                                     struct tevent_fd *fde,
1403                                     uint16_t flags,
1404                                     void *private_data)
1405 {
1406         struct tstream_bsd *bsds = talloc_get_type_abort(private_data,
1407                                    struct tstream_bsd);
1408
1409         if (flags & TEVENT_FD_WRITE) {
1410                 bsds->writeable_handler(bsds->writeable_private);
1411                 return;
1412         }
1413         if (flags & TEVENT_FD_READ) {
1414                 if (!bsds->readable_handler) {
1415                         if (bsds->writeable_handler) {
1416                                 bsds->writeable_handler(bsds->writeable_private);
1417                                 return;
1418                         }
1419                         TEVENT_FD_NOT_READABLE(bsds->fde);
1420                         return;
1421                 }
1422                 bsds->readable_handler(bsds->readable_private);
1423                 return;
1424         }
1425 }
1426
1427 static int tstream_bsd_set_readable_handler(struct tstream_bsd *bsds,
1428                                             struct tevent_context *ev,
1429                                             void (*handler)(void *private_data),
1430                                             void *private_data)
1431 {
1432         if (ev == NULL) {
1433                 if (handler) {
1434                         errno = EINVAL;
1435                         return -1;
1436                 }
1437                 if (!bsds->readable_handler) {
1438                         return 0;
1439                 }
1440                 bsds->readable_handler = NULL;
1441                 bsds->readable_private = NULL;
1442
1443                 return 0;
1444         }
1445
1446         /* read and write must use the same tevent_context */
1447         if (bsds->event_ptr != ev) {
1448                 if (bsds->readable_handler || bsds->writeable_handler) {
1449                         errno = EINVAL;
1450                         return -1;
1451                 }
1452                 bsds->event_ptr = NULL;
1453                 TALLOC_FREE(bsds->fde);
1454         }
1455
1456         if (tevent_fd_get_flags(bsds->fde) == 0) {
1457                 TALLOC_FREE(bsds->fde);
1458
1459                 bsds->fde = tevent_add_fd(ev, bsds,
1460                                           bsds->fd, TEVENT_FD_READ,
1461                                           tstream_bsd_fde_handler,
1462                                           bsds);
1463                 if (!bsds->fde) {
1464                         errno = ENOMEM;
1465                         return -1;
1466                 }
1467
1468                 /* cache the event context we're running on */
1469                 bsds->event_ptr = ev;
1470         } else if (!bsds->readable_handler) {
1471                 TEVENT_FD_READABLE(bsds->fde);
1472         }
1473
1474         bsds->readable_handler = handler;
1475         bsds->readable_private = private_data;
1476
1477         return 0;
1478 }
1479
1480 static int tstream_bsd_set_writeable_handler(struct tstream_bsd *bsds,
1481                                              struct tevent_context *ev,
1482                                              void (*handler)(void *private_data),
1483                                              void *private_data)
1484 {
1485         if (ev == NULL) {
1486                 if (handler) {
1487                         errno = EINVAL;
1488                         return -1;
1489                 }
1490                 if (!bsds->writeable_handler) {
1491                         return 0;
1492                 }
1493                 bsds->writeable_handler = NULL;
1494                 bsds->writeable_private = NULL;
1495                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
1496
1497                 return 0;
1498         }
1499
1500         /* read and write must use the same tevent_context */
1501         if (bsds->event_ptr != ev) {
1502                 if (bsds->readable_handler || bsds->writeable_handler) {
1503                         errno = EINVAL;
1504                         return -1;
1505                 }
1506                 bsds->event_ptr = NULL;
1507                 TALLOC_FREE(bsds->fde);
1508         }
1509
1510         if (tevent_fd_get_flags(bsds->fde) == 0) {
1511                 TALLOC_FREE(bsds->fde);
1512
1513                 bsds->fde = tevent_add_fd(ev, bsds,
1514                                           bsds->fd,
1515                                           TEVENT_FD_READ | TEVENT_FD_WRITE,
1516                                           tstream_bsd_fde_handler,
1517                                           bsds);
1518                 if (!bsds->fde) {
1519                         errno = ENOMEM;
1520                         return -1;
1521                 }
1522
1523                 /* cache the event context we're running on */
1524                 bsds->event_ptr = ev;
1525         } else if (!bsds->writeable_handler) {
1526                 uint16_t flags = tevent_fd_get_flags(bsds->fde);
1527                 flags |= TEVENT_FD_READ | TEVENT_FD_WRITE;
1528                 tevent_fd_set_flags(bsds->fde, flags);
1529         }
1530
1531         bsds->writeable_handler = handler;
1532         bsds->writeable_private = private_data;
1533
1534         return 0;
1535 }
1536
1537 static ssize_t tstream_bsd_pending_bytes(struct tstream_context *stream)
1538 {
1539         struct tstream_bsd *bsds = tstream_context_data(stream,
1540                                    struct tstream_bsd);
1541         ssize_t ret;
1542
1543         if (bsds->fd == -1) {
1544                 errno = ENOTCONN;
1545                 return -1;
1546         }
1547
1548         ret = tsocket_bsd_pending(bsds->fd);
1549
1550         return ret;
1551 }
1552
1553 struct tstream_bsd_readv_state {
1554         struct tstream_context *stream;
1555
1556         struct iovec *vector;
1557         size_t count;
1558
1559         int ret;
1560 };
1561
1562 static int tstream_bsd_readv_destructor(struct tstream_bsd_readv_state *state)
1563 {
1564         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1565                                    struct tstream_bsd);
1566
1567         tstream_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
1568
1569         return 0;
1570 }
1571
1572 static void tstream_bsd_readv_handler(void *private_data);
1573
1574 static struct tevent_req *tstream_bsd_readv_send(TALLOC_CTX *mem_ctx,
1575                                         struct tevent_context *ev,
1576                                         struct tstream_context *stream,
1577                                         struct iovec *vector,
1578                                         size_t count)
1579 {
1580         struct tevent_req *req;
1581         struct tstream_bsd_readv_state *state;
1582         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1583         int ret;
1584
1585         req = tevent_req_create(mem_ctx, &state,
1586                                 struct tstream_bsd_readv_state);
1587         if (!req) {
1588                 return NULL;
1589         }
1590
1591         state->stream   = stream;
1592         /* we make a copy of the vector so that we can modify it */
1593         state->vector   = talloc_array(state, struct iovec, count);
1594         if (tevent_req_nomem(state->vector, req)) {
1595                 goto post;
1596         }
1597         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1598         state->count    = count;
1599         state->ret      = 0;
1600
1601         talloc_set_destructor(state, tstream_bsd_readv_destructor);
1602
1603         if (bsds->fd == -1) {
1604                 tevent_req_error(req, ENOTCONN);
1605                 goto post;
1606         }
1607
1608         /*
1609          * this is a fast path, not waiting for the
1610          * socket to become explicit readable gains
1611          * about 10%-20% performance in benchmark tests.
1612          */
1613         tstream_bsd_readv_handler(req);
1614         if (!tevent_req_is_in_progress(req)) {
1615                 goto post;
1616         }
1617
1618         ret = tstream_bsd_set_readable_handler(bsds, ev,
1619                                               tstream_bsd_readv_handler,
1620                                               req);
1621         if (ret == -1) {
1622                 tevent_req_error(req, errno);
1623                 goto post;
1624         }
1625
1626         return req;
1627
1628  post:
1629         tevent_req_post(req, ev);
1630         return req;
1631 }
1632
1633 static void tstream_bsd_readv_handler(void *private_data)
1634 {
1635         struct tevent_req *req = talloc_get_type_abort(private_data,
1636                                  struct tevent_req);
1637         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1638                                         struct tstream_bsd_readv_state);
1639         struct tstream_context *stream = state->stream;
1640         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1641         int ret;
1642         int err;
1643         bool retry;
1644
1645         ret = readv(bsds->fd, state->vector, state->count);
1646         if (ret == 0) {
1647                 /* propagate end of file */
1648                 tevent_req_error(req, EPIPE);
1649                 return;
1650         }
1651         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1652         if (retry) {
1653                 /* retry later */
1654                 return;
1655         }
1656         if (tevent_req_error(req, err)) {
1657                 return;
1658         }
1659
1660         state->ret += ret;
1661
1662         while (ret > 0) {
1663                 if (ret < state->vector[0].iov_len) {
1664                         uint8_t *base;
1665                         base = (uint8_t *)state->vector[0].iov_base;
1666                         base += ret;
1667                         state->vector[0].iov_base = (void *)base;
1668                         state->vector[0].iov_len -= ret;
1669                         break;
1670                 }
1671                 ret -= state->vector[0].iov_len;
1672                 state->vector += 1;
1673                 state->count -= 1;
1674         }
1675
1676         /*
1677          * there're maybe some empty vectors at the end
1678          * which we need to skip, otherwise we would get
1679          * ret == 0 from the readv() call and return EPIPE
1680          */
1681         while (state->count > 0) {
1682                 if (state->vector[0].iov_len > 0) {
1683                         break;
1684                 }
1685                 state->vector += 1;
1686                 state->count -= 1;
1687         }
1688
1689         if (state->count > 0) {
1690                 /* we have more to read */
1691                 return;
1692         }
1693
1694         tevent_req_done(req);
1695 }
1696
1697 static int tstream_bsd_readv_recv(struct tevent_req *req,
1698                                   int *perrno)
1699 {
1700         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1701                                         struct tstream_bsd_readv_state);
1702         int ret;
1703
1704         ret = tsocket_simple_int_recv(req, perrno);
1705         if (ret == 0) {
1706                 ret = state->ret;
1707         }
1708
1709         tevent_req_received(req);
1710         return ret;
1711 }
1712
1713 struct tstream_bsd_writev_state {
1714         struct tstream_context *stream;
1715
1716         struct iovec *vector;
1717         size_t count;
1718
1719         int ret;
1720 };
1721
1722 static int tstream_bsd_writev_destructor(struct tstream_bsd_writev_state *state)
1723 {
1724         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1725                                   struct tstream_bsd);
1726
1727         tstream_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
1728
1729         return 0;
1730 }
1731
1732 static void tstream_bsd_writev_handler(void *private_data);
1733
1734 static struct tevent_req *tstream_bsd_writev_send(TALLOC_CTX *mem_ctx,
1735                                                  struct tevent_context *ev,
1736                                                  struct tstream_context *stream,
1737                                                  const struct iovec *vector,
1738                                                  size_t count)
1739 {
1740         struct tevent_req *req;
1741         struct tstream_bsd_writev_state *state;
1742         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1743         int ret;
1744
1745         req = tevent_req_create(mem_ctx, &state,
1746                                 struct tstream_bsd_writev_state);
1747         if (!req) {
1748                 return NULL;
1749         }
1750
1751         state->stream   = stream;
1752         /* we make a copy of the vector so that we can modify it */
1753         state->vector   = talloc_array(state, struct iovec, count);
1754         if (tevent_req_nomem(state->vector, req)) {
1755                 goto post;
1756         }
1757         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1758         state->count    = count;
1759         state->ret      = 0;
1760
1761         talloc_set_destructor(state, tstream_bsd_writev_destructor);
1762
1763         if (bsds->fd == -1) {
1764                 tevent_req_error(req, ENOTCONN);
1765                 goto post;
1766         }
1767
1768         /*
1769          * this is a fast path, not waiting for the
1770          * socket to become explicit writeable gains
1771          * about 10%-20% performance in benchmark tests.
1772          */
1773         tstream_bsd_writev_handler(req);
1774         if (!tevent_req_is_in_progress(req)) {
1775                 goto post;
1776         }
1777
1778         ret = tstream_bsd_set_writeable_handler(bsds, ev,
1779                                                tstream_bsd_writev_handler,
1780                                                req);
1781         if (ret == -1) {
1782                 tevent_req_error(req, errno);
1783                 goto post;
1784         }
1785
1786         return req;
1787
1788  post:
1789         tevent_req_post(req, ev);
1790         return req;
1791 }
1792
1793 static void tstream_bsd_writev_handler(void *private_data)
1794 {
1795         struct tevent_req *req = talloc_get_type_abort(private_data,
1796                                  struct tevent_req);
1797         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1798                                         struct tstream_bsd_writev_state);
1799         struct tstream_context *stream = state->stream;
1800         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1801         ssize_t ret;
1802         int err;
1803         bool retry;
1804
1805         ret = writev(bsds->fd, state->vector, state->count);
1806         if (ret == 0) {
1807                 /* propagate end of file */
1808                 tevent_req_error(req, EPIPE);
1809                 return;
1810         }
1811         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1812         if (retry) {
1813                 /* retry later */
1814                 return;
1815         }
1816         if (tevent_req_error(req, err)) {
1817                 return;
1818         }
1819
1820         state->ret += ret;
1821
1822         while (ret > 0) {
1823                 if (ret < state->vector[0].iov_len) {
1824                         uint8_t *base;
1825                         base = (uint8_t *)state->vector[0].iov_base;
1826                         base += ret;
1827                         state->vector[0].iov_base = (void *)base;
1828                         state->vector[0].iov_len -= ret;
1829                         break;
1830                 }
1831                 ret -= state->vector[0].iov_len;
1832                 state->vector += 1;
1833                 state->count -= 1;
1834         }
1835
1836         /*
1837          * there're maybe some empty vectors at the end
1838          * which we need to skip, otherwise we would get
1839          * ret == 0 from the writev() call and return EPIPE
1840          */
1841         while (state->count > 0) {
1842                 if (state->vector[0].iov_len > 0) {
1843                         break;
1844                 }
1845                 state->vector += 1;
1846                 state->count -= 1;
1847         }
1848
1849         if (state->count > 0) {
1850                 /* we have more to read */
1851                 return;
1852         }
1853
1854         tevent_req_done(req);
1855 }
1856
1857 static int tstream_bsd_writev_recv(struct tevent_req *req, int *perrno)
1858 {
1859         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1860                                         struct tstream_bsd_writev_state);
1861         int ret;
1862
1863         ret = tsocket_simple_int_recv(req, perrno);
1864         if (ret == 0) {
1865                 ret = state->ret;
1866         }
1867
1868         tevent_req_received(req);
1869         return ret;
1870 }
1871
1872 struct tstream_bsd_disconnect_state {
1873         void *__dummy;
1874 };
1875
1876 static struct tevent_req *tstream_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1877                                                      struct tevent_context *ev,
1878                                                      struct tstream_context *stream)
1879 {
1880         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1881         struct tevent_req *req;
1882         struct tstream_bsd_disconnect_state *state;
1883         int ret;
1884         int err;
1885         bool dummy;
1886
1887         req = tevent_req_create(mem_ctx, &state,
1888                                 struct tstream_bsd_disconnect_state);
1889         if (req == NULL) {
1890                 return NULL;
1891         }
1892
1893         if (bsds->fd == -1) {
1894                 tevent_req_error(req, ENOTCONN);
1895                 goto post;
1896         }
1897
1898         TALLOC_FREE(bsds->fde);
1899         ret = close(bsds->fd);
1900         bsds->fd = -1;
1901         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1902         if (tevent_req_error(req, err)) {
1903                 goto post;
1904         }
1905
1906         tevent_req_done(req);
1907 post:
1908         tevent_req_post(req, ev);
1909         return req;
1910 }
1911
1912 static int tstream_bsd_disconnect_recv(struct tevent_req *req,
1913                                       int *perrno)
1914 {
1915         int ret;
1916
1917         ret = tsocket_simple_int_recv(req, perrno);
1918
1919         tevent_req_received(req);
1920         return ret;
1921 }
1922
1923 static const struct tstream_context_ops tstream_bsd_ops = {
1924         .name                   = "bsd",
1925
1926         .pending_bytes          = tstream_bsd_pending_bytes,
1927
1928         .readv_send             = tstream_bsd_readv_send,
1929         .readv_recv             = tstream_bsd_readv_recv,
1930
1931         .writev_send            = tstream_bsd_writev_send,
1932         .writev_recv            = tstream_bsd_writev_recv,
1933
1934         .disconnect_send        = tstream_bsd_disconnect_send,
1935         .disconnect_recv        = tstream_bsd_disconnect_recv,
1936 };
1937
1938 static int tstream_bsd_destructor(struct tstream_bsd *bsds)
1939 {
1940         TALLOC_FREE(bsds->fde);
1941         if (bsds->fd != -1) {
1942                 close(bsds->fd);
1943                 bsds->fd = -1;
1944         }
1945         return 0;
1946 }
1947
1948 int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx,
1949                                  int fd,
1950                                  struct tstream_context **_stream,
1951                                  const char *location)
1952 {
1953         struct tstream_context *stream;
1954         struct tstream_bsd *bsds;
1955
1956         stream = tstream_context_create(mem_ctx,
1957                                         &tstream_bsd_ops,
1958                                         &bsds,
1959                                         struct tstream_bsd,
1960                                         location);
1961         if (!stream) {
1962                 return -1;
1963         }
1964         ZERO_STRUCTP(bsds);
1965         bsds->fd = fd;
1966         talloc_set_destructor(bsds, tstream_bsd_destructor);
1967
1968         *_stream = stream;
1969         return 0;
1970 }
1971
1972 struct tstream_bsd_connect_state {
1973         int fd;
1974         struct tevent_fd *fde;
1975         struct tstream_conext *stream;
1976         struct tsocket_address *local;
1977 };
1978
1979 static int tstream_bsd_connect_destructor(struct tstream_bsd_connect_state *state)
1980 {
1981         TALLOC_FREE(state->fde);
1982         if (state->fd != -1) {
1983                 close(state->fd);
1984                 state->fd = -1;
1985         }
1986
1987         return 0;
1988 }
1989
1990 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
1991                                             struct tevent_fd *fde,
1992                                             uint16_t flags,
1993                                             void *private_data);
1994
1995 static struct tevent_req *tstream_bsd_connect_send(TALLOC_CTX *mem_ctx,
1996                                         struct tevent_context *ev,
1997                                         int sys_errno,
1998                                         const struct tsocket_address *local,
1999                                         const struct tsocket_address *remote)
2000 {
2001         struct tevent_req *req;
2002         struct tstream_bsd_connect_state *state;
2003         struct tsocket_address_bsd *lbsda =
2004                 talloc_get_type_abort(local->private_data,
2005                 struct tsocket_address_bsd);
2006         struct tsocket_address_bsd *lrbsda = NULL;
2007         struct tsocket_address_bsd *rbsda =
2008                 talloc_get_type_abort(remote->private_data,
2009                 struct tsocket_address_bsd);
2010         int ret;
2011         int err;
2012         bool retry;
2013         bool do_bind = false;
2014         bool do_reuseaddr = false;
2015         bool do_ipv6only = false;
2016         bool is_inet = false;
2017         int sa_fam = lbsda->u.sa.sa_family;
2018
2019         req = tevent_req_create(mem_ctx, &state,
2020                                 struct tstream_bsd_connect_state);
2021         if (!req) {
2022                 return NULL;
2023         }
2024         state->fd = -1;
2025         state->fde = NULL;
2026
2027         talloc_set_destructor(state, tstream_bsd_connect_destructor);
2028
2029         /* give the wrappers a chance to report an error */
2030         if (sys_errno != 0) {
2031                 tevent_req_error(req, sys_errno);
2032                 goto post;
2033         }
2034
2035         switch (lbsda->u.sa.sa_family) {
2036         case AF_UNIX:
2037                 if (lbsda->u.un.sun_path[0] != 0) {
2038                         do_reuseaddr = true;
2039                         do_bind = true;
2040                 }
2041                 break;
2042         case AF_INET:
2043                 if (lbsda->u.in.sin_port != 0) {
2044                         do_reuseaddr = true;
2045                         do_bind = true;
2046                 }
2047                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
2048                         do_bind = true;
2049                 }
2050                 is_inet = true;
2051                 break;
2052 #ifdef HAVE_IPV6
2053         case AF_INET6:
2054                 if (lbsda->u.in6.sin6_port != 0) {
2055                         do_reuseaddr = true;
2056                         do_bind = true;
2057                 }
2058                 if (memcmp(&in6addr_any,
2059                            &lbsda->u.in6.sin6_addr,
2060                            sizeof(in6addr_any)) != 0) {
2061                         do_bind = true;
2062                 }
2063                 is_inet = true;
2064                 do_ipv6only = true;
2065                 break;
2066 #endif
2067         default:
2068                 tevent_req_error(req, EINVAL);
2069                 goto post;
2070         }
2071
2072         if (!do_bind && is_inet) {
2073                 sa_fam = rbsda->u.sa.sa_family;
2074                 switch (sa_fam) {
2075                 case AF_INET:
2076                         do_ipv6only = false;
2077                         break;
2078 #ifdef HAVE_IPV6
2079                 case AF_INET6:
2080                         do_ipv6only = true;
2081                         break;
2082 #endif
2083                 }
2084         }
2085
2086         if (is_inet) {
2087                 state->local = tsocket_address_create(state,
2088                                                       &tsocket_address_bsd_ops,
2089                                                       &lrbsda,
2090                                                       struct tsocket_address_bsd,
2091                                                       __location__ "bsd_connect");
2092                 if (tevent_req_nomem(state->local, req)) {
2093                         goto post;
2094                 }
2095
2096                 ZERO_STRUCTP(lrbsda);
2097                 lrbsda->sa_socklen = sizeof(lrbsda->u.ss);
2098         }
2099
2100         state->fd = socket(sa_fam, SOCK_STREAM, 0);
2101         if (state->fd == -1) {
2102                 tevent_req_error(req, errno);
2103                 goto post;
2104         }
2105
2106         state->fd = tsocket_bsd_common_prepare_fd(state->fd, true);
2107         if (state->fd == -1) {
2108                 tevent_req_error(req, errno);
2109                 goto post;
2110         }
2111
2112 #ifdef HAVE_IPV6
2113         if (do_ipv6only) {
2114                 int val = 1;
2115
2116                 ret = setsockopt(state->fd, IPPROTO_IPV6, IPV6_V6ONLY,
2117                                  (const void *)&val, sizeof(val));
2118                 if (ret == -1) {
2119                         tevent_req_error(req, errno);
2120                         goto post;
2121                 }
2122         }
2123 #endif
2124
2125         if (do_reuseaddr) {
2126                 int val = 1;
2127
2128                 ret = setsockopt(state->fd, SOL_SOCKET, SO_REUSEADDR,
2129                                  (const void *)&val, sizeof(val));
2130                 if (ret == -1) {
2131                         tevent_req_error(req, errno);
2132                         goto post;
2133                 }
2134         }
2135
2136         if (do_bind) {
2137                 ret = bind(state->fd, &lbsda->u.sa, lbsda->sa_socklen);
2138                 if (ret == -1) {
2139                         tevent_req_error(req, errno);
2140                         goto post;
2141                 }
2142         }
2143
2144         if (rbsda->u.sa.sa_family != sa_fam) {
2145                 tevent_req_error(req, EINVAL);
2146                 goto post;
2147         }
2148
2149         ret = connect(state->fd, &rbsda->u.sa, rbsda->sa_socklen);
2150         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2151         if (retry) {
2152                 /* retry later */
2153                 goto async;
2154         }
2155         if (tevent_req_error(req, err)) {
2156                 goto post;
2157         }
2158
2159         if (!state->local) {
2160                 tevent_req_done(req);
2161                 goto post;
2162         }
2163
2164         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2165         if (ret == -1) {
2166                 tevent_req_error(req, errno);
2167                 goto post;
2168         }
2169
2170         tevent_req_done(req);
2171         goto post;
2172
2173  async:
2174         state->fde = tevent_add_fd(ev, state,
2175                                    state->fd,
2176                                    TEVENT_FD_READ | TEVENT_FD_WRITE,
2177                                    tstream_bsd_connect_fde_handler,
2178                                    req);
2179         if (tevent_req_nomem(state->fde, req)) {
2180                 goto post;
2181         }
2182
2183         return req;
2184
2185  post:
2186         tevent_req_post(req, ev);
2187         return req;
2188 }
2189
2190 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2191                                             struct tevent_fd *fde,
2192                                             uint16_t flags,
2193                                             void *private_data)
2194 {
2195         struct tevent_req *req = talloc_get_type_abort(private_data,
2196                                  struct tevent_req);
2197         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2198                                         struct tstream_bsd_connect_state);
2199         struct tsocket_address_bsd *lrbsda = NULL;
2200         int ret;
2201         int error=0;
2202         socklen_t len = sizeof(error);
2203         int err;
2204         bool retry;
2205
2206         ret = getsockopt(state->fd, SOL_SOCKET, SO_ERROR, &error, &len);
2207         if (ret == 0) {
2208                 if (error != 0) {
2209                         errno = error;
2210                         ret = -1;
2211                 }
2212         }
2213         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2214         if (retry) {
2215                 /* retry later */
2216                 return;
2217         }
2218         if (tevent_req_error(req, err)) {
2219                 return;
2220         }
2221
2222         if (!state->local) {
2223                 tevent_req_done(req);
2224                 return;
2225         }
2226
2227         lrbsda = talloc_get_type_abort(state->local->private_data,
2228                                        struct tsocket_address_bsd);
2229
2230         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2231         if (ret == -1) {
2232                 tevent_req_error(req, errno);
2233                 return;
2234         }
2235
2236         tevent_req_done(req);
2237 }
2238
2239 static int tstream_bsd_connect_recv(struct tevent_req *req,
2240                                     int *perrno,
2241                                     TALLOC_CTX *mem_ctx,
2242                                     struct tstream_context **stream,
2243                                     struct tsocket_address **local,
2244                                     const char *location)
2245 {
2246         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2247                                         struct tstream_bsd_connect_state);
2248         int ret;
2249
2250         ret = tsocket_simple_int_recv(req, perrno);
2251         if (ret == 0) {
2252                 ret = _tstream_bsd_existing_socket(mem_ctx,
2253                                                    state->fd,
2254                                                    stream,
2255                                                    location);
2256                 if (ret == -1) {
2257                         *perrno = errno;
2258                         goto done;
2259                 }
2260                 TALLOC_FREE(state->fde);
2261                 state->fd = -1;
2262
2263                 if (local) {
2264                         *local = talloc_move(mem_ctx, &state->local);
2265                 }
2266         }
2267
2268 done:
2269         tevent_req_received(req);
2270         return ret;
2271 }
2272
2273 struct tevent_req * tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx,
2274                                         struct tevent_context *ev,
2275                                         const struct tsocket_address *local,
2276                                         const struct tsocket_address *remote)
2277 {
2278         struct tsocket_address_bsd *lbsda =
2279                 talloc_get_type_abort(local->private_data,
2280                 struct tsocket_address_bsd);
2281         struct tevent_req *req;
2282         int sys_errno = 0;
2283
2284         switch (lbsda->u.sa.sa_family) {
2285         case AF_INET:
2286                 break;
2287 #ifdef HAVE_IPV6
2288         case AF_INET6:
2289                 break;
2290 #endif
2291         default:
2292                 sys_errno = EINVAL;
2293                 break;
2294         }
2295
2296         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2297
2298         return req;
2299 }
2300
2301 int _tstream_inet_tcp_connect_recv(struct tevent_req *req,
2302                                    int *perrno,
2303                                    TALLOC_CTX *mem_ctx,
2304                                    struct tstream_context **stream,
2305                                    const char *location)
2306 {
2307         return tstream_bsd_connect_recv(req, perrno,
2308                                         mem_ctx, stream, NULL,
2309                                         location);
2310 }
2311
2312 struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx,
2313                                         struct tevent_context *ev,
2314                                         const struct tsocket_address *local,
2315                                         const struct tsocket_address *remote)
2316 {
2317         struct tsocket_address_bsd *lbsda =
2318                 talloc_get_type_abort(local->private_data,
2319                 struct tsocket_address_bsd);
2320         struct tevent_req *req;
2321         int sys_errno = 0;
2322
2323         switch (lbsda->u.sa.sa_family) {
2324         case AF_UNIX:
2325                 break;
2326         default:
2327                 sys_errno = EINVAL;
2328                 break;
2329         }
2330
2331         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2332
2333         return req;
2334 }
2335
2336 int _tstream_unix_connect_recv(struct tevent_req *req,
2337                                       int *perrno,
2338                                       TALLOC_CTX *mem_ctx,
2339                                       struct tstream_context **stream,
2340                                       const char *location)
2341 {
2342         return tstream_bsd_connect_recv(req, perrno,
2343                                         mem_ctx, stream, NULL,
2344                                         location);
2345 }
2346
2347 int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1,
2348                              struct tstream_context **_stream1,
2349                              TALLOC_CTX *mem_ctx2,
2350                              struct tstream_context **_stream2,
2351                              const char *location)
2352 {
2353         int ret;
2354         int fds[2];
2355         int fd1;
2356         int fd2;
2357         struct tstream_context *stream1 = NULL;
2358         struct tstream_context *stream2 = NULL;
2359
2360         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
2361         if (ret == -1) {
2362                 return -1;
2363         }
2364         fd1 = fds[0];
2365         fd2 = fds[1];
2366
2367         fd1 = tsocket_bsd_common_prepare_fd(fd1, true);
2368         if (fd1 == -1) {
2369                 int sys_errno = errno;
2370                 close(fd2);
2371                 errno = sys_errno;
2372                 return -1;
2373         }
2374
2375         fd2 = tsocket_bsd_common_prepare_fd(fd2, true);
2376         if (fd2 == -1) {
2377                 int sys_errno = errno;
2378                 close(fd1);
2379                 errno = sys_errno;
2380                 return -1;
2381         }
2382
2383         ret = _tstream_bsd_existing_socket(mem_ctx1,
2384                                            fd1,
2385                                            &stream1,
2386                                            location);
2387         if (ret == -1) {
2388                 int sys_errno = errno;
2389                 close(fd1);
2390                 close(fd2);
2391                 errno = sys_errno;
2392                 return -1;
2393         }
2394
2395         ret = _tstream_bsd_existing_socket(mem_ctx2,
2396                                            fd2,
2397                                            &stream2,
2398                                            location);
2399         if (ret == -1) {
2400                 int sys_errno = errno;
2401                 talloc_free(stream1);
2402                 close(fd2);
2403                 errno = sys_errno;
2404                 return -1;
2405         }
2406
2407         *_stream1 = stream1;
2408         *_stream2 = stream2;
2409         return 0;
2410 }
2411