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 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
 267         bsda->u.sa.sa_len = bsda->sa_socklen;
 268 #endif
 269
 270         *_addr = addr;
 271         return 0;
 272 }
 273
 274 ssize_t tsocket_address_bsd_sockaddr(const struct tsocket_address *addr,
 275                                      struct sockaddr *sa,
 276                                      size_t sa_socklen)
 277 {
 278         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 279                                            struct tsocket_address_bsd);
 280
 281         if (!bsda) {
 282                 errno = EINVAL;
 283                 return -1;
 284         }
 285
 286         if (sa_socklen < bsda->sa_socklen) {
 287                 errno = EINVAL;
 288                 return -1;
 289         }
 290
 291         if (sa_socklen > bsda->sa_socklen) {
 292                 memset(sa, 0, sa_socklen);
 293                 sa_socklen = bsda->sa_socklen;
 294         }
 295
 296         memcpy(sa, &bsda->u.ss, sa_socklen);
 297 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
 298         sa->sa_len = sa_socklen;
 299 #endif
 300         return sa_socklen;
 301 }
 302
 303 bool tsocket_address_is_inet(const struct tsocket_address *addr, const char *fam)
 304 {
 305         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 306                                            struct tsocket_address_bsd);
 307
 308         if (!bsda) {
 309                 return false;
 310         }
 311
 312         switch (bsda->u.sa.sa_family) {
 313         case AF_INET:
 314                 if (strcasecmp(fam, "ip") == 0) {
 315                         return true;
 316                 }
 317
 318                 if (strcasecmp(fam, "ipv4") == 0) {
 319                         return true;
 320                 }
 321
 322                 return false;
 323 #ifdef HAVE_IPV6
 324         case AF_INET6:
 325                 if (strcasecmp(fam, "ip") == 0) {
 326                         return true;
 327                 }
 328
 329                 if (strcasecmp(fam, "ipv6") == 0) {
 330                         return true;
 331                 }
 332
 333                 return false;
 334 #endif
 335         }
 336
 337         return false;
 338 }
 339
 340 int _tsocket_address_inet_from_strings(TALLOC_CTX *mem_ctx,
 341                                        const char *fam,
 342                                        const char *addr,
 343                                        uint16_t port,
 344                                        struct tsocket_address **_addr,
 345                                        const char *location)
 346 {
 347         struct addrinfo hints;
 348         struct addrinfo *result = NULL;
 349         char port_str[6];
 350         int ret;
 351
 352         ZERO_STRUCT(hints);
 353         /*
 354          * we use SOCKET_STREAM here to get just one result
 355          * back from getaddrinfo().
 356          */
 357         hints.ai_socktype = SOCK_STREAM;
 358         hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
 359
 360         if (strcasecmp(fam, "ip") == 0) {
 361                 hints.ai_family = AF_UNSPEC;
 362                 if (!addr) {
 363 #ifdef HAVE_IPV6
 364                         addr = "::";
 365 #else
 366                         addr = "0.0.0.0";
 367 #endif
 368                 }
 369         } else if (strcasecmp(fam, "ipv4") == 0) {
 370                 hints.ai_family = AF_INET;
 371                 if (!addr) {
 372                         addr = "0.0.0.0";
 373                 }
 374 #ifdef HAVE_IPV6
 375         } else if (strcasecmp(fam, "ipv6") == 0) {
 376                 hints.ai_family = AF_INET6;
 377                 if (!addr) {
 378                         addr = "::";
 379                 }
 380 #endif
 381         } else {
 382                 errno = EAFNOSUPPORT;
 383                 return -1;
 384         }
 385
 386         snprintf(port_str, sizeof(port_str) - 1, "%u", port);
 387
 388         ret = getaddrinfo(addr, port_str, &hints, &result);
 389         if (ret != 0) {
 390                 switch (ret) {
 391                 case EAI_FAIL:
 392                         errno = EINVAL;
 393                         break;
 394                 }
 395                 ret = -1;
 396                 goto done;
 397         }
 398
 399         if (result->ai_socktype != SOCK_STREAM) {
 400                 errno = EINVAL;
 401                 ret = -1;
 402                 goto done;
 403         }
 404
 405         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 406                                                   result->ai_addr,
 407                                                   result->ai_addrlen,
 408                                                   _addr,
 409                                                   location);
 410
 411 done:
 412         if (result) {
 413                 freeaddrinfo(result);
 414         }
 415         return ret;
 416 }
 417
 418 char *tsocket_address_inet_addr_string(const struct tsocket_address *addr,
 419                                        TALLOC_CTX *mem_ctx)
 420 {
 421         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 422                                            struct tsocket_address_bsd);
 423         char addr_str[INET6_ADDRSTRLEN+1];
 424         const char *str;
 425
 426         if (!bsda) {
 427                 errno = EINVAL;
 428                 return NULL;
 429         }
 430
 431         switch (bsda->u.sa.sa_family) {
 432         case AF_INET:
 433                 str = inet_ntop(bsda->u.in.sin_family,
 434                                 &bsda->u.in.sin_addr,
 435                                 addr_str, sizeof(addr_str));
 436                 break;
 437 #ifdef HAVE_IPV6
 438         case AF_INET6:
 439                 str = inet_ntop(bsda->u.in6.sin6_family,
 440                                 &bsda->u.in6.sin6_addr,
 441                                 addr_str, sizeof(addr_str));
 442                 break;
 443 #endif
 444         default:
 445                 errno = EINVAL;
 446                 return NULL;
 447         }
 448
 449         if (!str) {
 450                 return NULL;
 451         }
 452
 453         return talloc_strdup(mem_ctx, str);
 454 }
 455
 456 uint16_t tsocket_address_inet_port(const struct tsocket_address *addr)
 457 {
 458         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 459                                            struct tsocket_address_bsd);
 460         uint16_t port = 0;
 461
 462         if (!bsda) {
 463                 errno = EINVAL;
 464                 return 0;
 465         }
 466
 467         switch (bsda->u.sa.sa_family) {
 468         case AF_INET:
 469                 port = ntohs(bsda->u.in.sin_port);
 470                 break;
 471 #ifdef HAVE_IPV6
 472         case AF_INET6:
 473                 port = ntohs(bsda->u.in6.sin6_port);
 474                 break;
 475 #endif
 476         default:
 477                 errno = EINVAL;
 478                 return 0;
 479         }
 480
 481         return port;
 482 }
 483
 484 int tsocket_address_inet_set_port(struct tsocket_address *addr,
 485                                   uint16_t port)
 486 {
 487         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 488                                            struct tsocket_address_bsd);
 489
 490         if (!bsda) {
 491                 errno = EINVAL;
 492                 return -1;
 493         }
 494
 495         switch (bsda->u.sa.sa_family) {
 496         case AF_INET:
 497                 bsda->u.in.sin_port = htons(port);
 498                 break;
 499 #ifdef HAVE_IPV6
 500         case AF_INET6:
 501                 bsda->u.in6.sin6_port = htons(port);
 502                 break;
 503 #endif
 504         default:
 505                 errno = EINVAL;
 506                 return -1;
 507         }
 508
 509         return 0;
 510 }
 511
 512 bool tsocket_address_is_unix(const struct tsocket_address *addr)
 513 {
 514         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 515                                            struct tsocket_address_bsd);
 516
 517         if (!bsda) {
 518                 return false;
 519         }
 520
 521         switch (bsda->u.sa.sa_family) {
 522         case AF_UNIX:
 523                 return true;
 524         }
 525
 526         return false;
 527 }
 528
 529 int _tsocket_address_unix_from_path(TALLOC_CTX *mem_ctx,
 530                                     const char *path,
 531                                     struct tsocket_address **_addr,
 532                                     const char *location)
 533 {
 534         struct sockaddr_un un;
 535         void *p = &un;
 536         int ret;
 537
 538         if (!path) {
 539                 path = "";
 540         }
 541
 542         if (strlen(path) > sizeof(un.sun_path)-1) {
 543                 errno = ENAMETOOLONG;
 544                 return -1;
 545         }
 546
 547         ZERO_STRUCT(un);
 548         un.sun_family = AF_UNIX;
 549         strncpy(un.sun_path, path, sizeof(un.sun_path)-1);
 550
 551         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 552                                                  (struct sockaddr *)p,
 553                                                  sizeof(un),
 554                                                  _addr,
 555                                                  location);
 556
 557         return ret;
 558 }
 559
 560 char *tsocket_address_unix_path(const struct tsocket_address *addr,
 561                                 TALLOC_CTX *mem_ctx)
 562 {
 563         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 564                                            struct tsocket_address_bsd);
 565         const char *str;
 566
 567         if (!bsda) {
 568                 errno = EINVAL;
 569                 return NULL;
 570         }
 571
 572         switch (bsda->u.sa.sa_family) {
 573         case AF_UNIX:
 574                 str = bsda->u.un.sun_path;
 575                 break;
 576         default:
 577                 errno = EINVAL;
 578                 return NULL;
 579         }
 580
 581         return talloc_strdup(mem_ctx, str);
 582 }
 583
 584 static char *tsocket_address_bsd_string(const struct tsocket_address *addr,
 585                                         TALLOC_CTX *mem_ctx)
 586 {
 587         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 588                                            struct tsocket_address_bsd);
 589         char *str;
 590         char *addr_str;
 591         const char *prefix = NULL;
 592         uint16_t port;
 593
 594         switch (bsda->u.sa.sa_family) {
 595         case AF_UNIX:
 596                 return talloc_asprintf(mem_ctx, "unix:%s",
 597                                        bsda->u.un.sun_path);
 598         case AF_INET:
 599                 prefix = "ipv4";
 600                 break;
 601 #ifdef HAVE_IPV6
 602         case AF_INET6:
 603                 prefix = "ipv6";
 604                 break;
 605 #endif
 606         default:
 607                 errno = EINVAL;
 608                 return NULL;
 609         }
 610
 611         addr_str = tsocket_address_inet_addr_string(addr, mem_ctx);
 612         if (!addr_str) {
 613                 return NULL;
 614         }
 615
 616         port = tsocket_address_inet_port(addr);
 617
 618         str = talloc_asprintf(mem_ctx, "%s:%s:%u",
 619                               prefix, addr_str, port);
 620         talloc_free(addr_str);
 621
 622         return str;
 623 }
 624
 625 static struct tsocket_address *tsocket_address_bsd_copy(const struct tsocket_address *addr,
 626                                                          TALLOC_CTX *mem_ctx,
 627                                                          const char *location)
 628 {
 629         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 630                                            struct tsocket_address_bsd);
 631         struct tsocket_address *copy;
 632         int ret;
 633
 634         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 635                                                  &bsda->u.sa,
 636                                                  bsda->sa_socklen,
 637                                                  &copy,
 638                                                  location);
 639         if (ret != 0) {
 640                 return NULL;
 641         }
 642
 643         return copy;
 644 }
 645
 646 static const struct tsocket_address_ops tsocket_address_bsd_ops = {
 647         .name           = "bsd",
 648         .string         = tsocket_address_bsd_string,
 649         .copy           = tsocket_address_bsd_copy,
 650 };
 651
 652 struct tdgram_bsd {
 653         int fd;
 654
 655         void *event_ptr;
 656         struct tevent_fd *fde;
 657
 658         void *readable_private;
 659         void (*readable_handler)(void *private_data);
 660         void *writeable_private;
 661         void (*writeable_handler)(void *private_data);
 662 };
 663
 664 static void tdgram_bsd_fde_handler(struct tevent_context *ev,
 665                                    struct tevent_fd *fde,
 666                                    uint16_t flags,
 667                                    void *private_data)
 668 {
 669         struct tdgram_bsd *bsds = talloc_get_type_abort(private_data,
 670                                   struct tdgram_bsd);
 671
 672         if (flags & TEVENT_FD_WRITE) {
 673                 bsds->writeable_handler(bsds->writeable_private);
 674                 return;
 675         }
 676         if (flags & TEVENT_FD_READ) {
 677                 if (!bsds->readable_handler) {
 678                         TEVENT_FD_NOT_READABLE(bsds->fde);
 679                         return;
 680                 }
 681                 bsds->readable_handler(bsds->readable_private);
 682                 return;
 683         }
 684 }
 685
 686 static int tdgram_bsd_set_readable_handler(struct tdgram_bsd *bsds,
 687                                            struct tevent_context *ev,
 688                                            void (*handler)(void *private_data),
 689                                            void *private_data)
 690 {
 691         if (ev == NULL) {
 692                 if (handler) {
 693                         errno = EINVAL;
 694                         return -1;
 695                 }
 696                 if (!bsds->readable_handler) {
 697                         return 0;
 698                 }
 699                 bsds->readable_handler = NULL;
 700                 bsds->readable_private = NULL;
 701
 702                 return 0;
 703         }
 704
 705         /* read and write must use the same tevent_context */
 706         if (bsds->event_ptr != ev) {
 707                 if (bsds->readable_handler || bsds->writeable_handler) {
 708                         errno = EINVAL;
 709                         return -1;
 710                 }
 711                 bsds->event_ptr = NULL;
 712                 TALLOC_FREE(bsds->fde);
 713         }
 714
 715         if (tevent_fd_get_flags(bsds->fde) == 0) {
 716                 TALLOC_FREE(bsds->fde);
 717
 718                 bsds->fde = tevent_add_fd(ev, bsds,
 719                                           bsds->fd, TEVENT_FD_READ,
 720                                           tdgram_bsd_fde_handler,
 721                                           bsds);
 722                 if (!bsds->fde) {
 723                         errno = ENOMEM;
 724                         return -1;
 725                 }
 726
 727                 /* cache the event context we're running on */
 728                 bsds->event_ptr = ev;
 729         } else if (!bsds->readable_handler) {
 730                 TEVENT_FD_READABLE(bsds->fde);
 731         }
 732
 733         bsds->readable_handler = handler;
 734         bsds->readable_private = private_data;
 735
 736         return 0;
 737 }
 738
 739 static int tdgram_bsd_set_writeable_handler(struct tdgram_bsd *bsds,
 740                                             struct tevent_context *ev,
 741                                             void (*handler)(void *private_data),
 742                                             void *private_data)
 743 {
 744         if (ev == NULL) {
 745                 if (handler) {
 746                         errno = EINVAL;
 747                         return -1;
 748                 }
 749                 if (!bsds->writeable_handler) {
 750                         return 0;
 751                 }
 752                 bsds->writeable_handler = NULL;
 753                 bsds->writeable_private = NULL;
 754                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
 755
 756                 return 0;
 757         }
 758
 759         /* read and write must use the same tevent_context */
 760         if (bsds->event_ptr != ev) {
 761                 if (bsds->readable_handler || bsds->writeable_handler) {
 762                         errno = EINVAL;
 763                         return -1;
 764                 }
 765                 bsds->event_ptr = NULL;
 766                 TALLOC_FREE(bsds->fde);
 767         }
 768
 769         if (tevent_fd_get_flags(bsds->fde) == 0) {
 770                 TALLOC_FREE(bsds->fde);
 771
 772                 bsds->fde = tevent_add_fd(ev, bsds,
 773                                           bsds->fd, TEVENT_FD_WRITE,
 774                                           tdgram_bsd_fde_handler,
 775                                           bsds);
 776                 if (!bsds->fde) {
 777                         errno = ENOMEM;
 778                         return -1;
 779                 }
 780
 781                 /* cache the event context we're running on */
 782                 bsds->event_ptr = ev;
 783         } else if (!bsds->writeable_handler) {
 784                 TEVENT_FD_WRITEABLE(bsds->fde);
 785         }
 786
 787         bsds->writeable_handler = handler;
 788         bsds->writeable_private = private_data;
 789
 790         return 0;
 791 }
 792
 793 struct tdgram_bsd_recvfrom_state {
 794         struct tdgram_context *dgram;
 795
 796         uint8_t *buf;
 797         size_t len;
 798         struct tsocket_address *src;
 799 };
 800
 801 static int tdgram_bsd_recvfrom_destructor(struct tdgram_bsd_recvfrom_state *state)
 802 {
 803         struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
 804                                   struct tdgram_bsd);
 805
 806         tdgram_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
 807
 808         return 0;
 809 }
 810
 811 static void tdgram_bsd_recvfrom_handler(void *private_data);
 812
 813 static struct tevent_req *tdgram_bsd_recvfrom_send(TALLOC_CTX *mem_ctx,
 814                                         struct tevent_context *ev,
 815                                         struct tdgram_context *dgram)
 816 {
 817         struct tevent_req *req;
 818         struct tdgram_bsd_recvfrom_state *state;
 819         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 820         int ret;
 821
 822         req = tevent_req_create(mem_ctx, &state,
 823                                 struct tdgram_bsd_recvfrom_state);
 824         if (!req) {
 825                 return NULL;
 826         }
 827
 828         state->dgram    = dgram;
 829         state->buf      = NULL;
 830         state->len      = 0;
 831         state->src      = NULL;
 832
 833         talloc_set_destructor(state, tdgram_bsd_recvfrom_destructor);
 834
 835         if (bsds->fd == -1) {
 836                 tevent_req_error(req, ENOTCONN);
 837                 goto post;
 838         }
 839
 840         /*
 841          * this is a fast path, not waiting for the
 842          * socket to become explicit readable gains
 843          * about 10%-20% performance in benchmark tests.
 844          */
 845         tdgram_bsd_recvfrom_handler(req);
 846         if (!tevent_req_is_in_progress(req)) {
 847                 goto post;
 848         }
 849
 850         ret = tdgram_bsd_set_readable_handler(bsds, ev,
 851                                               tdgram_bsd_recvfrom_handler,
 852                                               req);
 853         if (ret == -1) {
 854                 tevent_req_error(req, errno);
 855                 goto post;
 856         }
 857
 858         return req;
 859
 860  post:
 861         tevent_req_post(req, ev);
 862         return req;
 863 }
 864
 865 static void tdgram_bsd_recvfrom_handler(void *private_data)
 866 {
 867         struct tevent_req *req = talloc_get_type_abort(private_data,
 868                                  struct tevent_req);
 869         struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
 870                                         struct tdgram_bsd_recvfrom_state);
 871         struct tdgram_context *dgram = state->dgram;
 872         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 873         struct tsocket_address_bsd *bsda;
 874         ssize_t ret;
 875         int err;
 876         bool retry;
 877
 878         ret = tsocket_bsd_pending(bsds->fd);
 879         if (ret == 0) {
 880                 /* retry later */
 881                 return;
 882         }
 883         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
 884         if (retry) {
 885                 /* retry later */
 886                 return;
 887         }
 888         if (tevent_req_error(req, err)) {
 889                 return;
 890         }
 891
 892         state->buf = talloc_array(state, uint8_t, ret);
 893         if (tevent_req_nomem(state->buf, req)) {
 894                 return;
 895         }
 896         state->len = ret;
 897
 898         state->src = tsocket_address_create(state,
 899                                             &tsocket_address_bsd_ops,
 900                                             &bsda,
 901                                             struct tsocket_address_bsd,
 902                                             __location__ "bsd_recvfrom");
 903         if (tevent_req_nomem(state->src, req)) {
 904                 return;
 905         }
 906
 907         ZERO_STRUCTP(bsda);
 908         bsda->sa_socklen = sizeof(bsda->u.ss);
 909 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
 910         bsda->u.sa.sa_len = bsda->sa_socklen;
 911 #endif
 912
 913         ret = recvfrom(bsds->fd, state->buf, state->len, 0,
 914                        &bsda->u.sa, &bsda->sa_socklen);
 915         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
 916         if (retry) {
 917                 /* retry later */
 918                 return;
 919         }
 920         if (tevent_req_error(req, err)) {
 921                 return;
 922         }
 923
 924         /*
 925          * Some systems (FreeBSD, see bug #7115) return too much
 926          * bytes in tsocket_bsd_pending()/ioctl(fd, FIONREAD, ...),
 927          * the return value includes some IP/UDP header bytes,
 928          * while recvfrom() just returns the payload.
 929          */
 930         state->buf = talloc_realloc(state, state->buf, uint8_t, ret);
 931         if (tevent_req_nomem(state->buf, req)) {
 932                 return;
 933         }
 934         state->len = ret;
 935
 936         tevent_req_done(req);
 937 }
 938
 939 static ssize_t tdgram_bsd_recvfrom_recv(struct tevent_req *req,
 940                                         int *perrno,
 941                                         TALLOC_CTX *mem_ctx,
 942                                         uint8_t **buf,
 943                                         struct tsocket_address **src)
 944 {
 945         struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
 946                                         struct tdgram_bsd_recvfrom_state);
 947         ssize_t ret;
 948
 949         ret = tsocket_simple_int_recv(req, perrno);
 950         if (ret == 0) {
 951                 *buf = talloc_move(mem_ctx, &state->buf);
 952                 ret = state->len;
 953                 if (src) {
 954                         *src = talloc_move(mem_ctx, &state->src);
 955                 }
 956         }
 957
 958         tevent_req_received(req);
 959         return ret;
 960 }
 961
 962 struct tdgram_bsd_sendto_state {
 963         struct tdgram_context *dgram;
 964
 965         const uint8_t *buf;
 966         size_t len;
 967         const struct tsocket_address *dst;
 968
 969         ssize_t ret;
 970 };
 971
 972 static int tdgram_bsd_sendto_destructor(struct tdgram_bsd_sendto_state *state)
 973 {
 974         struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
 975                                   struct tdgram_bsd);
 976
 977         tdgram_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
 978
 979         return 0;
 980 }
 981
 982 static void tdgram_bsd_sendto_handler(void *private_data);
 983
 984 static struct tevent_req *tdgram_bsd_sendto_send(TALLOC_CTX *mem_ctx,
 985                                                  struct tevent_context *ev,
 986                                                  struct tdgram_context *dgram,
 987                                                  const uint8_t *buf,
 988                                                  size_t len,
 989                                                  const struct tsocket_address *dst)
 990 {
 991         struct tevent_req *req;
 992         struct tdgram_bsd_sendto_state *state;
 993         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 994         int ret;
 995
 996         req = tevent_req_create(mem_ctx, &state,
 997                                 struct tdgram_bsd_sendto_state);
 998         if (!req) {
 999                 return NULL;
1000         }
1001
1002         state->dgram    = dgram;
1003         state->buf      = buf;
1004         state->len      = len;
1005         state->dst      = dst;
1006         state->ret      = -1;
1007
1008         talloc_set_destructor(state, tdgram_bsd_sendto_destructor);
1009
1010         if (bsds->fd == -1) {
1011                 tevent_req_error(req, ENOTCONN);
1012                 goto post;
1013         }
1014
1015         /*
1016          * this is a fast path, not waiting for the
1017          * socket to become explicit writeable gains
1018          * about 10%-20% performance in benchmark tests.
1019          */
1020         tdgram_bsd_sendto_handler(req);
1021         if (!tevent_req_is_in_progress(req)) {
1022                 goto post;
1023         }
1024
1025         ret = tdgram_bsd_set_writeable_handler(bsds, ev,
1026                                                tdgram_bsd_sendto_handler,
1027                                                req);
1028         if (ret == -1) {
1029                 tevent_req_error(req, errno);
1030                 goto post;
1031         }
1032
1033         return req;
1034
1035  post:
1036         tevent_req_post(req, ev);
1037         return req;
1038 }
1039
1040 static void tdgram_bsd_sendto_handler(void *private_data)
1041 {
1042         struct tevent_req *req = talloc_get_type_abort(private_data,
1043                                  struct tevent_req);
1044         struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1045                                         struct tdgram_bsd_sendto_state);
1046         struct tdgram_context *dgram = state->dgram;
1047         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1048         struct sockaddr *sa = NULL;
1049         socklen_t sa_socklen = 0;
1050         ssize_t ret;
1051         int err;
1052         bool retry;
1053
1054         if (state->dst) {
1055                 struct tsocket_address_bsd *bsda =
1056                         talloc_get_type(state->dst->private_data,
1057                         struct tsocket_address_bsd);
1058
1059                 sa = &bsda->u.sa;
1060                 sa_socklen = bsda->sa_socklen;
1061         }
1062
1063         ret = sendto(bsds->fd, state->buf, state->len, 0, sa, sa_socklen);
1064         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1065         if (retry) {
1066                 /* retry later */
1067                 return;
1068         }
1069         if (tevent_req_error(req, err)) {
1070                 return;
1071         }
1072
1073         state->ret = ret;
1074
1075         tevent_req_done(req);
1076 }
1077
1078 static ssize_t tdgram_bsd_sendto_recv(struct tevent_req *req, int *perrno)
1079 {
1080         struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1081                                         struct tdgram_bsd_sendto_state);
1082         ssize_t ret;
1083
1084         ret = tsocket_simple_int_recv(req, perrno);
1085         if (ret == 0) {
1086                 ret = state->ret;
1087         }
1088
1089         tevent_req_received(req);
1090         return ret;
1091 }
1092
1093 struct tdgram_bsd_disconnect_state {
1094         uint8_t __dummy;
1095 };
1096
1097 static struct tevent_req *tdgram_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1098                                                      struct tevent_context *ev,
1099                                                      struct tdgram_context *dgram)
1100 {
1101         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1102         struct tevent_req *req;
1103         struct tdgram_bsd_disconnect_state *state;
1104         int ret;
1105         int err;
1106         bool dummy;
1107
1108         req = tevent_req_create(mem_ctx, &state,
1109                                 struct tdgram_bsd_disconnect_state);
1110         if (req == NULL) {
1111                 return NULL;
1112         }
1113
1114         if (bsds->fd == -1) {
1115                 tevent_req_error(req, ENOTCONN);
1116                 goto post;
1117         }
1118
1119         TALLOC_FREE(bsds->fde);
1120         ret = close(bsds->fd);
1121         bsds->fd = -1;
1122         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1123         if (tevent_req_error(req, err)) {
1124                 goto post;
1125         }
1126
1127         tevent_req_done(req);
1128 post:
1129         tevent_req_post(req, ev);
1130         return req;
1131 }
1132
1133 static int tdgram_bsd_disconnect_recv(struct tevent_req *req,
1134                                       int *perrno)
1135 {
1136         int ret;
1137
1138         ret = tsocket_simple_int_recv(req, perrno);
1139
1140         tevent_req_received(req);
1141         return ret;
1142 }
1143
1144 static const struct tdgram_context_ops tdgram_bsd_ops = {
1145         .name                   = "bsd",
1146
1147         .recvfrom_send          = tdgram_bsd_recvfrom_send,
1148         .recvfrom_recv          = tdgram_bsd_recvfrom_recv,
1149
1150         .sendto_send            = tdgram_bsd_sendto_send,
1151         .sendto_recv            = tdgram_bsd_sendto_recv,
1152
1153         .disconnect_send        = tdgram_bsd_disconnect_send,
1154         .disconnect_recv        = tdgram_bsd_disconnect_recv,
1155 };
1156
1157 static int tdgram_bsd_destructor(struct tdgram_bsd *bsds)
1158 {
1159         TALLOC_FREE(bsds->fde);
1160         if (bsds->fd != -1) {
1161                 close(bsds->fd);
1162                 bsds->fd = -1;
1163         }
1164         return 0;
1165 }
1166
1167 static int tdgram_bsd_dgram_socket(const struct tsocket_address *local,
1168                                    const struct tsocket_address *remote,
1169                                    bool broadcast,
1170                                    TALLOC_CTX *mem_ctx,
1171                                    struct tdgram_context **_dgram,
1172                                    const char *location)
1173 {
1174         struct tsocket_address_bsd *lbsda =
1175                 talloc_get_type_abort(local->private_data,
1176                 struct tsocket_address_bsd);
1177         struct tsocket_address_bsd *rbsda = NULL;
1178         struct tdgram_context *dgram;
1179         struct tdgram_bsd *bsds;
1180         int fd;
1181         int ret;
1182         bool do_bind = false;
1183         bool do_reuseaddr = false;
1184         bool do_ipv6only = false;
1185         bool is_inet = false;
1186         int sa_fam = lbsda->u.sa.sa_family;
1187
1188         if (remote) {
1189                 rbsda = talloc_get_type_abort(remote->private_data,
1190                         struct tsocket_address_bsd);
1191         }
1192
1193         switch (lbsda->u.sa.sa_family) {
1194         case AF_UNIX:
1195                 if (broadcast) {
1196                         errno = EINVAL;
1197                         return -1;
1198                 }
1199                 if (lbsda->u.un.sun_path[0] != 0) {
1200                         do_reuseaddr = true;
1201                         do_bind = true;
1202                 }
1203                 break;
1204         case AF_INET:
1205                 if (lbsda->u.in.sin_port != 0) {
1206                         do_reuseaddr = true;
1207                         do_bind = true;
1208                 }
1209                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
1210                         do_bind = true;
1211                 }
1212                 is_inet = true;
1213                 break;
1214 #ifdef HAVE_IPV6
1215         case AF_INET6:
1216                 if (lbsda->u.in6.sin6_port != 0) {
1217                         do_reuseaddr = true;
1218                         do_bind = true;
1219                 }
1220                 if (memcmp(&in6addr_any,
1221                            &lbsda->u.in6.sin6_addr,
1222                            sizeof(in6addr_any)) != 0) {
1223                         do_bind = true;
1224                 }
1225                 is_inet = true;
1226                 do_ipv6only = true;
1227                 break;
1228 #endif
1229         default:
1230                 errno = EINVAL;
1231                 return -1;
1232         }
1233
1234         if (!do_bind && is_inet && rbsda) {
1235                 sa_fam = rbsda->u.sa.sa_family;
1236                 switch (sa_fam) {
1237                 case AF_INET:
1238                         do_ipv6only = false;
1239                         break;
1240 #ifdef HAVE_IPV6
1241                 case AF_INET6:
1242                         do_ipv6only = true;
1243                         break;
1244 #endif
1245                 }
1246         }
1247
1248         fd = socket(sa_fam, SOCK_DGRAM, 0);
1249         if (fd < 0) {
1250                 return -1;
1251         }
1252
1253         fd = tsocket_bsd_common_prepare_fd(fd, true);
1254         if (fd < 0) {
1255                 return -1;
1256         }
1257
1258         dgram = tdgram_context_create(mem_ctx,
1259                                       &tdgram_bsd_ops,
1260                                       &bsds,
1261                                       struct tdgram_bsd,
1262                                       location);
1263         if (!dgram) {
1264                 int saved_errno = errno;
1265                 close(fd);
1266                 errno = saved_errno;
1267                 return -1;
1268         }
1269         ZERO_STRUCTP(bsds);
1270         bsds->fd = fd;
1271         talloc_set_destructor(bsds, tdgram_bsd_destructor);
1272
1273 #ifdef HAVE_IPV6
1274         if (do_ipv6only) {
1275                 int val = 1;
1276
1277                 ret = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
1278                                  (const void *)&val, sizeof(val));
1279                 if (ret == -1) {
1280                         int saved_errno = errno;
1281                         talloc_free(dgram);
1282                         errno = saved_errno;
1283                         return -1;
1284                 }
1285         }
1286 #endif
1287
1288         if (broadcast) {
1289                 int val = 1;
1290
1291                 ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
1292                                  (const void *)&val, sizeof(val));
1293                 if (ret == -1) {
1294                         int saved_errno = errno;
1295                         talloc_free(dgram);
1296                         errno = saved_errno;
1297                         return -1;
1298                 }
1299         }
1300
1301         if (do_reuseaddr) {
1302                 int val = 1;
1303
1304                 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1305                                  (const void *)&val, sizeof(val));
1306                 if (ret == -1) {
1307                         int saved_errno = errno;
1308                         talloc_free(dgram);
1309                         errno = saved_errno;
1310                         return -1;
1311                 }
1312         }
1313
1314         if (do_bind) {
1315                 ret = bind(fd, &lbsda->u.sa, lbsda->sa_socklen);
1316                 if (ret == -1) {
1317                         int saved_errno = errno;
1318                         talloc_free(dgram);
1319                         errno = saved_errno;
1320                         return -1;
1321                 }
1322         }
1323
1324         if (rbsda) {
1325                 if (rbsda->u.sa.sa_family != sa_fam) {
1326                         talloc_free(dgram);
1327                         errno = EINVAL;
1328                         return -1;
1329                 }
1330
1331                 ret = connect(fd, &rbsda->u.sa, rbsda->sa_socklen);
1332                 if (ret == -1) {
1333                         int saved_errno = errno;
1334                         talloc_free(dgram);
1335                         errno = saved_errno;
1336                         return -1;
1337                 }
1338         }
1339
1340         *_dgram = dgram;
1341         return 0;
1342 }
1343
1344 int _tdgram_inet_udp_socket(const struct tsocket_address *local,
1345                             const struct tsocket_address *remote,
1346                             TALLOC_CTX *mem_ctx,
1347                             struct tdgram_context **dgram,
1348                             const char *location)
1349 {
1350         struct tsocket_address_bsd *lbsda =
1351                 talloc_get_type_abort(local->private_data,
1352                 struct tsocket_address_bsd);
1353         int ret;
1354
1355         switch (lbsda->u.sa.sa_family) {
1356         case AF_INET:
1357                 break;
1358 #ifdef HAVE_IPV6
1359         case AF_INET6:
1360                 break;
1361 #endif
1362         default:
1363                 errno = EINVAL;
1364                 return -1;
1365         }
1366
1367         ret = tdgram_bsd_dgram_socket(local, remote, false,
1368                                       mem_ctx, dgram, location);
1369
1370         return ret;
1371 }
1372
1373 int _tdgram_unix_socket(const struct tsocket_address *local,
1374                         const struct tsocket_address *remote,
1375                         TALLOC_CTX *mem_ctx,
1376                         struct tdgram_context **dgram,
1377                         const char *location)
1378 {
1379         struct tsocket_address_bsd *lbsda =
1380                 talloc_get_type_abort(local->private_data,
1381                 struct tsocket_address_bsd);
1382         int ret;
1383
1384         switch (lbsda->u.sa.sa_family) {
1385         case AF_UNIX:
1386                 break;
1387         default:
1388                 errno = EINVAL;
1389                 return -1;
1390         }
1391
1392         ret = tdgram_bsd_dgram_socket(local, remote, false,
1393                                       mem_ctx, dgram, location);
1394
1395         return ret;
1396 }
1397
1398 struct tstream_bsd {
1399         int fd;
1400
1401         void *event_ptr;
1402         struct tevent_fd *fde;
1403
1404         void *readable_private;
1405         void (*readable_handler)(void *private_data);
1406         void *writeable_private;
1407         void (*writeable_handler)(void *private_data);
1408 };
1409
1410 static void tstream_bsd_fde_handler(struct tevent_context *ev,
1411                                     struct tevent_fd *fde,
1412                                     uint16_t flags,
1413                                     void *private_data)
1414 {
1415         struct tstream_bsd *bsds = talloc_get_type_abort(private_data,
1416                                    struct tstream_bsd);
1417
1418         if (flags & TEVENT_FD_WRITE) {
1419                 bsds->writeable_handler(bsds->writeable_private);
1420                 return;
1421         }
1422         if (flags & TEVENT_FD_READ) {
1423                 if (!bsds->readable_handler) {
1424                         if (bsds->writeable_handler) {
1425                                 bsds->writeable_handler(bsds->writeable_private);
1426                                 return;
1427                         }
1428                         TEVENT_FD_NOT_READABLE(bsds->fde);
1429                         return;
1430                 }
1431                 bsds->readable_handler(bsds->readable_private);
1432                 return;
1433         }
1434 }
1435
1436 static int tstream_bsd_set_readable_handler(struct tstream_bsd *bsds,
1437                                             struct tevent_context *ev,
1438                                             void (*handler)(void *private_data),
1439                                             void *private_data)
1440 {
1441         if (ev == NULL) {
1442                 if (handler) {
1443                         errno = EINVAL;
1444                         return -1;
1445                 }
1446                 if (!bsds->readable_handler) {
1447                         return 0;
1448                 }
1449                 bsds->readable_handler = NULL;
1450                 bsds->readable_private = NULL;
1451
1452                 return 0;
1453         }
1454
1455         /* read and write must use the same tevent_context */
1456         if (bsds->event_ptr != ev) {
1457                 if (bsds->readable_handler || bsds->writeable_handler) {
1458                         errno = EINVAL;
1459                         return -1;
1460                 }
1461                 bsds->event_ptr = NULL;
1462                 TALLOC_FREE(bsds->fde);
1463         }
1464
1465         if (tevent_fd_get_flags(bsds->fde) == 0) {
1466                 TALLOC_FREE(bsds->fde);
1467
1468                 bsds->fde = tevent_add_fd(ev, bsds,
1469                                           bsds->fd, TEVENT_FD_READ,
1470                                           tstream_bsd_fde_handler,
1471                                           bsds);
1472                 if (!bsds->fde) {
1473                         errno = ENOMEM;
1474                         return -1;
1475                 }
1476
1477                 /* cache the event context we're running on */
1478                 bsds->event_ptr = ev;
1479         } else if (!bsds->readable_handler) {
1480                 TEVENT_FD_READABLE(bsds->fde);
1481         }
1482
1483         bsds->readable_handler = handler;
1484         bsds->readable_private = private_data;
1485
1486         return 0;
1487 }
1488
1489 static int tstream_bsd_set_writeable_handler(struct tstream_bsd *bsds,
1490                                              struct tevent_context *ev,
1491                                              void (*handler)(void *private_data),
1492                                              void *private_data)
1493 {
1494         if (ev == NULL) {
1495                 if (handler) {
1496                         errno = EINVAL;
1497                         return -1;
1498                 }
1499                 if (!bsds->writeable_handler) {
1500                         return 0;
1501                 }
1502                 bsds->writeable_handler = NULL;
1503                 bsds->writeable_private = NULL;
1504                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
1505
1506                 return 0;
1507         }
1508
1509         /* read and write must use the same tevent_context */
1510         if (bsds->event_ptr != ev) {
1511                 if (bsds->readable_handler || bsds->writeable_handler) {
1512                         errno = EINVAL;
1513                         return -1;
1514                 }
1515                 bsds->event_ptr = NULL;
1516                 TALLOC_FREE(bsds->fde);
1517         }
1518
1519         if (tevent_fd_get_flags(bsds->fde) == 0) {
1520                 TALLOC_FREE(bsds->fde);
1521
1522                 bsds->fde = tevent_add_fd(ev, bsds,
1523                                           bsds->fd,
1524                                           TEVENT_FD_READ | TEVENT_FD_WRITE,
1525                                           tstream_bsd_fde_handler,
1526                                           bsds);
1527                 if (!bsds->fde) {
1528                         errno = ENOMEM;
1529                         return -1;
1530                 }
1531
1532                 /* cache the event context we're running on */
1533                 bsds->event_ptr = ev;
1534         } else if (!bsds->writeable_handler) {
1535                 uint16_t flags = tevent_fd_get_flags(bsds->fde);
1536                 flags |= TEVENT_FD_READ | TEVENT_FD_WRITE;
1537                 tevent_fd_set_flags(bsds->fde, flags);
1538         }
1539
1540         bsds->writeable_handler = handler;
1541         bsds->writeable_private = private_data;
1542
1543         return 0;
1544 }
1545
1546 static ssize_t tstream_bsd_pending_bytes(struct tstream_context *stream)
1547 {
1548         struct tstream_bsd *bsds = tstream_context_data(stream,
1549                                    struct tstream_bsd);
1550         ssize_t ret;
1551
1552         if (bsds->fd == -1) {
1553                 errno = ENOTCONN;
1554                 return -1;
1555         }
1556
1557         ret = tsocket_bsd_pending(bsds->fd);
1558
1559         return ret;
1560 }
1561
1562 struct tstream_bsd_readv_state {
1563         struct tstream_context *stream;
1564
1565         struct iovec *vector;
1566         size_t count;
1567
1568         int ret;
1569 };
1570
1571 static int tstream_bsd_readv_destructor(struct tstream_bsd_readv_state *state)
1572 {
1573         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1574                                    struct tstream_bsd);
1575
1576         tstream_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
1577
1578         return 0;
1579 }
1580
1581 static void tstream_bsd_readv_handler(void *private_data);
1582
1583 static struct tevent_req *tstream_bsd_readv_send(TALLOC_CTX *mem_ctx,
1584                                         struct tevent_context *ev,
1585                                         struct tstream_context *stream,
1586                                         struct iovec *vector,
1587                                         size_t count)
1588 {
1589         struct tevent_req *req;
1590         struct tstream_bsd_readv_state *state;
1591         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1592         int ret;
1593
1594         req = tevent_req_create(mem_ctx, &state,
1595                                 struct tstream_bsd_readv_state);
1596         if (!req) {
1597                 return NULL;
1598         }
1599
1600         state->stream   = stream;
1601         /* we make a copy of the vector so that we can modify it */
1602         state->vector   = talloc_array(state, struct iovec, count);
1603         if (tevent_req_nomem(state->vector, req)) {
1604                 goto post;
1605         }
1606         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1607         state->count    = count;
1608         state->ret      = 0;
1609
1610         talloc_set_destructor(state, tstream_bsd_readv_destructor);
1611
1612         if (bsds->fd == -1) {
1613                 tevent_req_error(req, ENOTCONN);
1614                 goto post;
1615         }
1616
1617         /*
1618          * this is a fast path, not waiting for the
1619          * socket to become explicit readable gains
1620          * about 10%-20% performance in benchmark tests.
1621          */
1622         tstream_bsd_readv_handler(req);
1623         if (!tevent_req_is_in_progress(req)) {
1624                 goto post;
1625         }
1626
1627         ret = tstream_bsd_set_readable_handler(bsds, ev,
1628                                               tstream_bsd_readv_handler,
1629                                               req);
1630         if (ret == -1) {
1631                 tevent_req_error(req, errno);
1632                 goto post;
1633         }
1634
1635         return req;
1636
1637  post:
1638         tevent_req_post(req, ev);
1639         return req;
1640 }
1641
1642 static void tstream_bsd_readv_handler(void *private_data)
1643 {
1644         struct tevent_req *req = talloc_get_type_abort(private_data,
1645                                  struct tevent_req);
1646         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1647                                         struct tstream_bsd_readv_state);
1648         struct tstream_context *stream = state->stream;
1649         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1650         int ret;
1651         int err;
1652         bool retry;
1653
1654         ret = readv(bsds->fd, state->vector, state->count);
1655         if (ret == 0) {
1656                 /* propagate end of file */
1657                 tevent_req_error(req, EPIPE);
1658                 return;
1659         }
1660         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1661         if (retry) {
1662                 /* retry later */
1663                 return;
1664         }
1665         if (tevent_req_error(req, err)) {
1666                 return;
1667         }
1668
1669         state->ret += ret;
1670
1671         while (ret > 0) {
1672                 if (ret < state->vector[0].iov_len) {
1673                         uint8_t *base;
1674                         base = (uint8_t *)state->vector[0].iov_base;
1675                         base += ret;
1676                         state->vector[0].iov_base = (void *)base;
1677                         state->vector[0].iov_len -= ret;
1678                         break;
1679                 }
1680                 ret -= state->vector[0].iov_len;
1681                 state->vector += 1;
1682                 state->count -= 1;
1683         }
1684
1685         /*
1686          * there're maybe some empty vectors at the end
1687          * which we need to skip, otherwise we would get
1688          * ret == 0 from the readv() call and return EPIPE
1689          */
1690         while (state->count > 0) {
1691                 if (state->vector[0].iov_len > 0) {
1692                         break;
1693                 }
1694                 state->vector += 1;
1695                 state->count -= 1;
1696         }
1697
1698         if (state->count > 0) {
1699                 /* we have more to read */
1700                 return;
1701         }
1702
1703         tevent_req_done(req);
1704 }
1705
1706 static int tstream_bsd_readv_recv(struct tevent_req *req,
1707                                   int *perrno)
1708 {
1709         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1710                                         struct tstream_bsd_readv_state);
1711         int ret;
1712
1713         ret = tsocket_simple_int_recv(req, perrno);
1714         if (ret == 0) {
1715                 ret = state->ret;
1716         }
1717
1718         tevent_req_received(req);
1719         return ret;
1720 }
1721
1722 struct tstream_bsd_writev_state {
1723         struct tstream_context *stream;
1724
1725         struct iovec *vector;
1726         size_t count;
1727
1728         int ret;
1729 };
1730
1731 static int tstream_bsd_writev_destructor(struct tstream_bsd_writev_state *state)
1732 {
1733         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1734                                   struct tstream_bsd);
1735
1736         tstream_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
1737
1738         return 0;
1739 }
1740
1741 static void tstream_bsd_writev_handler(void *private_data);
1742
1743 static struct tevent_req *tstream_bsd_writev_send(TALLOC_CTX *mem_ctx,
1744                                                  struct tevent_context *ev,
1745                                                  struct tstream_context *stream,
1746                                                  const struct iovec *vector,
1747                                                  size_t count)
1748 {
1749         struct tevent_req *req;
1750         struct tstream_bsd_writev_state *state;
1751         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1752         int ret;
1753
1754         req = tevent_req_create(mem_ctx, &state,
1755                                 struct tstream_bsd_writev_state);
1756         if (!req) {
1757                 return NULL;
1758         }
1759
1760         state->stream   = stream;
1761         /* we make a copy of the vector so that we can modify it */
1762         state->vector   = talloc_array(state, struct iovec, count);
1763         if (tevent_req_nomem(state->vector, req)) {
1764                 goto post;
1765         }
1766         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1767         state->count    = count;
1768         state->ret      = 0;
1769
1770         talloc_set_destructor(state, tstream_bsd_writev_destructor);
1771
1772         if (bsds->fd == -1) {
1773                 tevent_req_error(req, ENOTCONN);
1774                 goto post;
1775         }
1776
1777         /*
1778          * this is a fast path, not waiting for the
1779          * socket to become explicit writeable gains
1780          * about 10%-20% performance in benchmark tests.
1781          */
1782         tstream_bsd_writev_handler(req);
1783         if (!tevent_req_is_in_progress(req)) {
1784                 goto post;
1785         }
1786
1787         ret = tstream_bsd_set_writeable_handler(bsds, ev,
1788                                                tstream_bsd_writev_handler,
1789                                                req);
1790         if (ret == -1) {
1791                 tevent_req_error(req, errno);
1792                 goto post;
1793         }
1794
1795         return req;
1796
1797  post:
1798         tevent_req_post(req, ev);
1799         return req;
1800 }
1801
1802 static void tstream_bsd_writev_handler(void *private_data)
1803 {
1804         struct tevent_req *req = talloc_get_type_abort(private_data,
1805                                  struct tevent_req);
1806         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1807                                         struct tstream_bsd_writev_state);
1808         struct tstream_context *stream = state->stream;
1809         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1810         ssize_t ret;
1811         int err;
1812         bool retry;
1813
1814         ret = writev(bsds->fd, state->vector, state->count);
1815         if (ret == 0) {
1816                 /* propagate end of file */
1817                 tevent_req_error(req, EPIPE);
1818                 return;
1819         }
1820         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1821         if (retry) {
1822                 /* retry later */
1823                 return;
1824         }
1825         if (tevent_req_error(req, err)) {
1826                 return;
1827         }
1828
1829         state->ret += ret;
1830
1831         while (ret > 0) {
1832                 if (ret < state->vector[0].iov_len) {
1833                         uint8_t *base;
1834                         base = (uint8_t *)state->vector[0].iov_base;
1835                         base += ret;
1836                         state->vector[0].iov_base = (void *)base;
1837                         state->vector[0].iov_len -= ret;
1838                         break;
1839                 }
1840                 ret -= state->vector[0].iov_len;
1841                 state->vector += 1;
1842                 state->count -= 1;
1843         }
1844
1845         /*
1846          * there're maybe some empty vectors at the end
1847          * which we need to skip, otherwise we would get
1848          * ret == 0 from the writev() call and return EPIPE
1849          */
1850         while (state->count > 0) {
1851                 if (state->vector[0].iov_len > 0) {
1852                         break;
1853                 }
1854                 state->vector += 1;
1855                 state->count -= 1;
1856         }
1857
1858         if (state->count > 0) {
1859                 /* we have more to read */
1860                 return;
1861         }
1862
1863         tevent_req_done(req);
1864 }
1865
1866 static int tstream_bsd_writev_recv(struct tevent_req *req, int *perrno)
1867 {
1868         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1869                                         struct tstream_bsd_writev_state);
1870         int ret;
1871
1872         ret = tsocket_simple_int_recv(req, perrno);
1873         if (ret == 0) {
1874                 ret = state->ret;
1875         }
1876
1877         tevent_req_received(req);
1878         return ret;
1879 }
1880
1881 struct tstream_bsd_disconnect_state {
1882         void *__dummy;
1883 };
1884
1885 static struct tevent_req *tstream_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1886                                                      struct tevent_context *ev,
1887                                                      struct tstream_context *stream)
1888 {
1889         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1890         struct tevent_req *req;
1891         struct tstream_bsd_disconnect_state *state;
1892         int ret;
1893         int err;
1894         bool dummy;
1895
1896         req = tevent_req_create(mem_ctx, &state,
1897                                 struct tstream_bsd_disconnect_state);
1898         if (req == NULL) {
1899                 return NULL;
1900         }
1901
1902         if (bsds->fd == -1) {
1903                 tevent_req_error(req, ENOTCONN);
1904                 goto post;
1905         }
1906
1907         TALLOC_FREE(bsds->fde);
1908         ret = close(bsds->fd);
1909         bsds->fd = -1;
1910         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1911         if (tevent_req_error(req, err)) {
1912                 goto post;
1913         }
1914
1915         tevent_req_done(req);
1916 post:
1917         tevent_req_post(req, ev);
1918         return req;
1919 }
1920
1921 static int tstream_bsd_disconnect_recv(struct tevent_req *req,
1922                                       int *perrno)
1923 {
1924         int ret;
1925
1926         ret = tsocket_simple_int_recv(req, perrno);
1927
1928         tevent_req_received(req);
1929         return ret;
1930 }
1931
1932 static const struct tstream_context_ops tstream_bsd_ops = {
1933         .name                   = "bsd",
1934
1935         .pending_bytes          = tstream_bsd_pending_bytes,
1936
1937         .readv_send             = tstream_bsd_readv_send,
1938         .readv_recv             = tstream_bsd_readv_recv,
1939
1940         .writev_send            = tstream_bsd_writev_send,
1941         .writev_recv            = tstream_bsd_writev_recv,
1942
1943         .disconnect_send        = tstream_bsd_disconnect_send,
1944         .disconnect_recv        = tstream_bsd_disconnect_recv,
1945 };
1946
1947 static int tstream_bsd_destructor(struct tstream_bsd *bsds)
1948 {
1949         TALLOC_FREE(bsds->fde);
1950         if (bsds->fd != -1) {
1951                 close(bsds->fd);
1952                 bsds->fd = -1;
1953         }
1954         return 0;
1955 }
1956
1957 int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx,
1958                                  int fd,
1959                                  struct tstream_context **_stream,
1960                                  const char *location)
1961 {
1962         struct tstream_context *stream;
1963         struct tstream_bsd *bsds;
1964
1965         stream = tstream_context_create(mem_ctx,
1966                                         &tstream_bsd_ops,
1967                                         &bsds,
1968                                         struct tstream_bsd,
1969                                         location);
1970         if (!stream) {
1971                 return -1;
1972         }
1973         ZERO_STRUCTP(bsds);
1974         bsds->fd = fd;
1975         talloc_set_destructor(bsds, tstream_bsd_destructor);
1976
1977         *_stream = stream;
1978         return 0;
1979 }
1980
1981 struct tstream_bsd_connect_state {
1982         int fd;
1983         struct tevent_fd *fde;
1984         struct tstream_conext *stream;
1985         struct tsocket_address *local;
1986 };
1987
1988 static int tstream_bsd_connect_destructor(struct tstream_bsd_connect_state *state)
1989 {
1990         TALLOC_FREE(state->fde);
1991         if (state->fd != -1) {
1992                 close(state->fd);
1993                 state->fd = -1;
1994         }
1995
1996         return 0;
1997 }
1998
1999 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2000                                             struct tevent_fd *fde,
2001                                             uint16_t flags,
2002                                             void *private_data);
2003
2004 static struct tevent_req *tstream_bsd_connect_send(TALLOC_CTX *mem_ctx,
2005                                         struct tevent_context *ev,
2006                                         int sys_errno,
2007                                         const struct tsocket_address *local,
2008                                         const struct tsocket_address *remote)
2009 {
2010         struct tevent_req *req;
2011         struct tstream_bsd_connect_state *state;
2012         struct tsocket_address_bsd *lbsda =
2013                 talloc_get_type_abort(local->private_data,
2014                 struct tsocket_address_bsd);
2015         struct tsocket_address_bsd *lrbsda = NULL;
2016         struct tsocket_address_bsd *rbsda =
2017                 talloc_get_type_abort(remote->private_data,
2018                 struct tsocket_address_bsd);
2019         int ret;
2020         int err;
2021         bool retry;
2022         bool do_bind = false;
2023         bool do_reuseaddr = false;
2024         bool do_ipv6only = false;
2025         bool is_inet = false;
2026         int sa_fam = lbsda->u.sa.sa_family;
2027
2028         req = tevent_req_create(mem_ctx, &state,
2029                                 struct tstream_bsd_connect_state);
2030         if (!req) {
2031                 return NULL;
2032         }
2033         state->fd = -1;
2034         state->fde = NULL;
2035
2036         talloc_set_destructor(state, tstream_bsd_connect_destructor);
2037
2038         /* give the wrappers a chance to report an error */
2039         if (sys_errno != 0) {
2040                 tevent_req_error(req, sys_errno);
2041                 goto post;
2042         }
2043
2044         switch (lbsda->u.sa.sa_family) {
2045         case AF_UNIX:
2046                 if (lbsda->u.un.sun_path[0] != 0) {
2047                         do_reuseaddr = true;
2048                         do_bind = true;
2049                 }
2050                 break;
2051         case AF_INET:
2052                 if (lbsda->u.in.sin_port != 0) {
2053                         do_reuseaddr = true;
2054                         do_bind = true;
2055                 }
2056                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
2057                         do_bind = true;
2058                 }
2059                 is_inet = true;
2060                 break;
2061 #ifdef HAVE_IPV6
2062         case AF_INET6:
2063                 if (lbsda->u.in6.sin6_port != 0) {
2064                         do_reuseaddr = true;
2065                         do_bind = true;
2066                 }
2067                 if (memcmp(&in6addr_any,
2068                            &lbsda->u.in6.sin6_addr,
2069                            sizeof(in6addr_any)) != 0) {
2070                         do_bind = true;
2071                 }
2072                 is_inet = true;
2073                 do_ipv6only = true;
2074                 break;
2075 #endif
2076         default:
2077                 tevent_req_error(req, EINVAL);
2078                 goto post;
2079         }
2080
2081         if (!do_bind && is_inet) {
2082                 sa_fam = rbsda->u.sa.sa_family;
2083                 switch (sa_fam) {
2084                 case AF_INET:
2085                         do_ipv6only = false;
2086                         break;
2087 #ifdef HAVE_IPV6
2088                 case AF_INET6:
2089                         do_ipv6only = true;
2090                         break;
2091 #endif
2092                 }
2093         }
2094
2095         if (is_inet) {
2096                 state->local = tsocket_address_create(state,
2097                                                       &tsocket_address_bsd_ops,
2098                                                       &lrbsda,
2099                                                       struct tsocket_address_bsd,
2100                                                       __location__ "bsd_connect");
2101                 if (tevent_req_nomem(state->local, req)) {
2102                         goto post;
2103                 }
2104
2105                 ZERO_STRUCTP(lrbsda);
2106                 lrbsda->sa_socklen = sizeof(lrbsda->u.ss);
2107         }
2108
2109         state->fd = socket(sa_fam, SOCK_STREAM, 0);
2110         if (state->fd == -1) {
2111                 tevent_req_error(req, errno);
2112                 goto post;
2113         }
2114
2115         state->fd = tsocket_bsd_common_prepare_fd(state->fd, true);
2116         if (state->fd == -1) {
2117                 tevent_req_error(req, errno);
2118                 goto post;
2119         }
2120
2121 #ifdef HAVE_IPV6
2122         if (do_ipv6only) {
2123                 int val = 1;
2124
2125                 ret = setsockopt(state->fd, IPPROTO_IPV6, IPV6_V6ONLY,
2126                                  (const void *)&val, sizeof(val));
2127                 if (ret == -1) {
2128                         tevent_req_error(req, errno);
2129                         goto post;
2130                 }
2131         }
2132 #endif
2133
2134         if (do_reuseaddr) {
2135                 int val = 1;
2136
2137                 ret = setsockopt(state->fd, SOL_SOCKET, SO_REUSEADDR,
2138                                  (const void *)&val, sizeof(val));
2139                 if (ret == -1) {
2140                         tevent_req_error(req, errno);
2141                         goto post;
2142                 }
2143         }
2144
2145         if (do_bind) {
2146                 ret = bind(state->fd, &lbsda->u.sa, lbsda->sa_socklen);
2147                 if (ret == -1) {
2148                         tevent_req_error(req, errno);
2149                         goto post;
2150                 }
2151         }
2152
2153         if (rbsda->u.sa.sa_family != sa_fam) {
2154                 tevent_req_error(req, EINVAL);
2155                 goto post;
2156         }
2157
2158         ret = connect(state->fd, &rbsda->u.sa, rbsda->sa_socklen);
2159         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2160         if (retry) {
2161                 /* retry later */
2162                 goto async;
2163         }
2164         if (tevent_req_error(req, err)) {
2165                 goto post;
2166         }
2167
2168         if (!state->local) {
2169                 tevent_req_done(req);
2170                 goto post;
2171         }
2172
2173         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2174         if (ret == -1) {
2175                 tevent_req_error(req, errno);
2176                 goto post;
2177         }
2178
2179         tevent_req_done(req);
2180         goto post;
2181
2182  async:
2183         state->fde = tevent_add_fd(ev, state,
2184                                    state->fd,
2185                                    TEVENT_FD_READ | TEVENT_FD_WRITE,
2186                                    tstream_bsd_connect_fde_handler,
2187                                    req);
2188         if (tevent_req_nomem(state->fde, req)) {
2189                 goto post;
2190         }
2191
2192         return req;
2193
2194  post:
2195         tevent_req_post(req, ev);
2196         return req;
2197 }
2198
2199 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2200                                             struct tevent_fd *fde,
2201                                             uint16_t flags,
2202                                             void *private_data)
2203 {
2204         struct tevent_req *req = talloc_get_type_abort(private_data,
2205                                  struct tevent_req);
2206         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2207                                         struct tstream_bsd_connect_state);
2208         struct tsocket_address_bsd *lrbsda = NULL;
2209         int ret;
2210         int error=0;
2211         socklen_t len = sizeof(error);
2212         int err;
2213         bool retry;
2214
2215         ret = getsockopt(state->fd, SOL_SOCKET, SO_ERROR, &error, &len);
2216         if (ret == 0) {
2217                 if (error != 0) {
2218                         errno = error;
2219                         ret = -1;
2220                 }
2221         }
2222         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2223         if (retry) {
2224                 /* retry later */
2225                 return;
2226         }
2227         if (tevent_req_error(req, err)) {
2228                 return;
2229         }
2230
2231         if (!state->local) {
2232                 tevent_req_done(req);
2233                 return;
2234         }
2235
2236         lrbsda = talloc_get_type_abort(state->local->private_data,
2237                                        struct tsocket_address_bsd);
2238
2239         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2240         if (ret == -1) {
2241                 tevent_req_error(req, errno);
2242                 return;
2243         }
2244
2245         tevent_req_done(req);
2246 }
2247
2248 static int tstream_bsd_connect_recv(struct tevent_req *req,
2249                                     int *perrno,
2250                                     TALLOC_CTX *mem_ctx,
2251                                     struct tstream_context **stream,
2252                                     struct tsocket_address **local,
2253                                     const char *location)
2254 {
2255         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2256                                         struct tstream_bsd_connect_state);
2257         int ret;
2258
2259         ret = tsocket_simple_int_recv(req, perrno);
2260         if (ret == 0) {
2261                 ret = _tstream_bsd_existing_socket(mem_ctx,
2262                                                    state->fd,
2263                                                    stream,
2264                                                    location);
2265                 if (ret == -1) {
2266                         *perrno = errno;
2267                         goto done;
2268                 }
2269                 TALLOC_FREE(state->fde);
2270                 state->fd = -1;
2271
2272                 if (local) {
2273                         *local = talloc_move(mem_ctx, &state->local);
2274                 }
2275         }
2276
2277 done:
2278         tevent_req_received(req);
2279         return ret;
2280 }
2281
2282 struct tevent_req * tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx,
2283                                         struct tevent_context *ev,
2284                                         const struct tsocket_address *local,
2285                                         const struct tsocket_address *remote)
2286 {
2287         struct tsocket_address_bsd *lbsda =
2288                 talloc_get_type_abort(local->private_data,
2289                 struct tsocket_address_bsd);
2290         struct tevent_req *req;
2291         int sys_errno = 0;
2292
2293         switch (lbsda->u.sa.sa_family) {
2294         case AF_INET:
2295                 break;
2296 #ifdef HAVE_IPV6
2297         case AF_INET6:
2298                 break;
2299 #endif
2300         default:
2301                 sys_errno = EINVAL;
2302                 break;
2303         }
2304
2305         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2306
2307         return req;
2308 }
2309
2310 int _tstream_inet_tcp_connect_recv(struct tevent_req *req,
2311                                    int *perrno,
2312                                    TALLOC_CTX *mem_ctx,
2313                                    struct tstream_context **stream,
2314                                    struct tsocket_address **local,
2315                                    const char *location)
2316 {
2317         return tstream_bsd_connect_recv(req, perrno,
2318                                         mem_ctx, stream, local,
2319                                         location);
2320 }
2321
2322 struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx,
2323                                         struct tevent_context *ev,
2324                                         const struct tsocket_address *local,
2325                                         const struct tsocket_address *remote)
2326 {
2327         struct tsocket_address_bsd *lbsda =
2328                 talloc_get_type_abort(local->private_data,
2329                 struct tsocket_address_bsd);
2330         struct tevent_req *req;
2331         int sys_errno = 0;
2332
2333         switch (lbsda->u.sa.sa_family) {
2334         case AF_UNIX:
2335                 break;
2336         default:
2337                 sys_errno = EINVAL;
2338                 break;
2339         }
2340
2341         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2342
2343         return req;
2344 }
2345
2346 int _tstream_unix_connect_recv(struct tevent_req *req,
2347                                       int *perrno,
2348                                       TALLOC_CTX *mem_ctx,
2349                                       struct tstream_context **stream,
2350                                       const char *location)
2351 {
2352         return tstream_bsd_connect_recv(req, perrno,
2353                                         mem_ctx, stream, NULL,
2354                                         location);
2355 }
2356
2357 int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1,
2358                              struct tstream_context **_stream1,
2359                              TALLOC_CTX *mem_ctx2,
2360                              struct tstream_context **_stream2,
2361                              const char *location)
2362 {
2363         int ret;
2364         int fds[2];
2365         int fd1;
2366         int fd2;
2367         struct tstream_context *stream1 = NULL;
2368         struct tstream_context *stream2 = NULL;
2369
2370         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
2371         if (ret == -1) {
2372                 return -1;
2373         }
2374         fd1 = fds[0];
2375         fd2 = fds[1];
2376
2377         fd1 = tsocket_bsd_common_prepare_fd(fd1, true);
2378         if (fd1 == -1) {
2379                 int sys_errno = errno;
2380                 close(fd2);
2381                 errno = sys_errno;
2382                 return -1;
2383         }
2384
2385         fd2 = tsocket_bsd_common_prepare_fd(fd2, true);
2386         if (fd2 == -1) {
2387                 int sys_errno = errno;
2388                 close(fd1);
2389                 errno = sys_errno;
2390                 return -1;
2391         }
2392
2393         ret = _tstream_bsd_existing_socket(mem_ctx1,
2394                                            fd1,
2395                                            &stream1,
2396                                            location);
2397         if (ret == -1) {
2398                 int sys_errno = errno;
2399                 close(fd1);
2400                 close(fd2);
2401                 errno = sys_errno;
2402                 return -1;
2403         }
2404
2405         ret = _tstream_bsd_existing_socket(mem_ctx2,
2406                                            fd2,
2407                                            &stream2,
2408                                            location);
2409         if (ret == -1) {
2410                 int sys_errno = errno;
2411                 talloc_free(stream1);
2412                 close(fd2);
2413                 errno = sys_errno;
2414                 return -1;
2415         }
2416
2417         *_stream1 = stream1;
2418         *_stream2 = stream2;
2419         return 0;
2420 }
2421