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 #include "lib/util/iov_buf.h"
  30 #include "lib/util/blocking.h"
  31
  32 static int tsocket_bsd_error_from_errno(int ret,
  33                                         int sys_errno,
  34                                         bool *retry)
  35 {
  36         *retry = false;
  37
  38         if (ret >= 0) {
  39                 return 0;
  40         }
  41
  42         if (ret != -1) {
  43                 return EIO;
  44         }
  45
  46         if (sys_errno == 0) {
  47                 return EIO;
  48         }
  49
  50         if (sys_errno == EINTR) {
  51                 *retry = true;
  52                 return sys_errno;
  53         }
  54
  55         if (sys_errno == EINPROGRESS) {
  56                 *retry = true;
  57                 return sys_errno;
  58         }
  59
  60         if (sys_errno == EAGAIN) {
  61                 *retry = true;
  62                 return sys_errno;
  63         }
  64
  65         /* ENOMEM is retryable on Solaris/illumos, and possibly other systems. */
  66         if (sys_errno == ENOMEM) {
  67                 *retry = true;
  68                 return sys_errno;
  69         }
  70
  71 #ifdef EWOULDBLOCK
  72         if (sys_errno == EWOULDBLOCK) {
  73                 *retry = true;
  74                 return sys_errno;
  75         }
  76 #endif
  77
  78         return sys_errno;
  79 }
  80
  81 static int tsocket_bsd_common_prepare_fd(int fd, bool high_fd)
  82 {
  83         int i;
  84         int sys_errno = 0;
  85         int fds[3];
  86         int num_fds = 0;
  87
  88         int result;
  89         bool ok;
  90
  91         if (fd == -1) {
  92                 return -1;
  93         }
  94
  95         /* first make a fd >= 3 */
  96         if (high_fd) {
  97                 while (fd < 3) {
  98                         fds[num_fds++] = fd;
  99                         fd = dup(fd);
 100                         if (fd == -1) {
 101                                 sys_errno = errno;
 102                                 break;
 103                         }
 104                 }
 105                 for (i=0; i<num_fds; i++) {
 106                         close(fds[i]);
 107                 }
 108                 if (fd == -1) {
 109                         errno = sys_errno;
 110                         return fd;
 111                 }
 112         }
 113
 114         result = set_blocking(fd, false);
 115         if (result == -1) {
 116                 goto fail;
 117         }
 118
 119         ok = smb_set_close_on_exec(fd);
 120         if (!ok) {
 121                 goto fail;
 122         }
 123
 124         return fd;
 125
 126  fail:
 127         if (fd != -1) {
 128                 sys_errno = errno;
 129                 close(fd);
 130                 errno = sys_errno;
 131         }
 132         return -1;
 133 }
 134
 135 static ssize_t tsocket_bsd_pending(int fd)
 136 {
 137         int ret, error;
 138         int value = 0;
 139         socklen_t len;
 140
 141         ret = ioctl(fd, FIONREAD, &value);
 142         if (ret == -1) {
 143                 return ret;
 144         }
 145
 146         if (ret != 0) {
 147                 /* this should not be reached */
 148                 errno = EIO;
 149                 return -1;
 150         }
 151
 152         if (value != 0) {
 153                 return value;
 154         }
 155
 156         error = 0;
 157         len = sizeof(error);
 158
 159         /*
 160          * if no data is available check if the socket is in error state. For
 161          * dgram sockets it's the way to return ICMP error messages of
 162          * connected sockets to the caller.
 163          */
 164         ret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len);
 165         if (ret == -1) {
 166                 return ret;
 167         }
 168         if (error != 0) {
 169                 errno = error;
 170                 return -1;
 171         }
 172         return 0;
 173 }
 174
 175 static const struct tsocket_address_ops tsocket_address_bsd_ops;
 176
 177 struct tsocket_address_bsd {
 178         socklen_t sa_socklen;
 179         union {
 180                 struct sockaddr sa;
 181                 struct sockaddr_in in;
 182 #ifdef HAVE_IPV6
 183                 struct sockaddr_in6 in6;
 184 #endif
 185                 struct sockaddr_un un;
 186                 struct sockaddr_storage ss;
 187         } u;
 188 };
 189
 190 int _tsocket_address_bsd_from_sockaddr(TALLOC_CTX *mem_ctx,
 191                                        const struct sockaddr *sa,
 192                                        size_t sa_socklen,
 193                                        struct tsocket_address **_addr,
 194                                        const char *location)
 195 {
 196         struct tsocket_address *addr;
 197         struct tsocket_address_bsd *bsda;
 198
 199         if (sa_socklen < sizeof(sa->sa_family)) {
 200                 errno = EINVAL;
 201                 return -1;
 202         }
 203
 204         switch (sa->sa_family) {
 205         case AF_UNIX:
 206                 if (sa_socklen > sizeof(struct sockaddr_un)) {
 207                         sa_socklen = sizeof(struct sockaddr_un);
 208                 }
 209                 break;
 210         case AF_INET:
 211                 if (sa_socklen < sizeof(struct sockaddr_in)) {
 212                         errno = EINVAL;
 213                         return -1;
 214                 }
 215                 sa_socklen = sizeof(struct sockaddr_in);
 216                 break;
 217 #ifdef HAVE_IPV6
 218         case AF_INET6:
 219                 if (sa_socklen < sizeof(struct sockaddr_in6)) {
 220                         errno = EINVAL;
 221                         return -1;
 222                 }
 223                 sa_socklen = sizeof(struct sockaddr_in6);
 224                 break;
 225 #endif
 226         default:
 227                 errno = EAFNOSUPPORT;
 228                 return -1;
 229         }
 230
 231         if (sa_socklen > sizeof(struct sockaddr_storage)) {
 232                 errno = EINVAL;
 233                 return -1;
 234         }
 235
 236         addr = tsocket_address_create(mem_ctx,
 237                                       &tsocket_address_bsd_ops,
 238                                       &bsda,
 239                                       struct tsocket_address_bsd,
 240                                       location);
 241         if (!addr) {
 242                 errno = ENOMEM;
 243                 return -1;
 244         }
 245
 246         ZERO_STRUCTP(bsda);
 247
 248         memcpy(&bsda->u.ss, sa, sa_socklen);
 249
 250         bsda->sa_socklen = sa_socklen;
 251 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
 252         bsda->u.sa.sa_len = bsda->sa_socklen;
 253 #endif
 254
 255         *_addr = addr;
 256         return 0;
 257 }
 258
 259 ssize_t tsocket_address_bsd_sockaddr(const struct tsocket_address *addr,
 260                                      struct sockaddr *sa,
 261                                      size_t sa_socklen)
 262 {
 263         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 264                                            struct tsocket_address_bsd);
 265
 266         if (!bsda) {
 267                 errno = EINVAL;
 268                 return -1;
 269         }
 270
 271         if (sa_socklen < bsda->sa_socklen) {
 272                 errno = EINVAL;
 273                 return -1;
 274         }
 275
 276         if (sa_socklen > bsda->sa_socklen) {
 277                 memset(sa, 0, sa_socklen);
 278                 sa_socklen = bsda->sa_socklen;
 279         }
 280
 281         memcpy(sa, &bsda->u.ss, sa_socklen);
 282 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
 283         sa->sa_len = sa_socklen;
 284 #endif
 285         return sa_socklen;
 286 }
 287
 288 bool tsocket_address_is_inet(const struct tsocket_address *addr, const char *fam)
 289 {
 290         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 291                                            struct tsocket_address_bsd);
 292
 293         if (!bsda) {
 294                 return false;
 295         }
 296
 297         switch (bsda->u.sa.sa_family) {
 298         case AF_INET:
 299                 if (strcasecmp(fam, "ip") == 0) {
 300                         return true;
 301                 }
 302
 303                 if (strcasecmp(fam, "ipv4") == 0) {
 304                         return true;
 305                 }
 306
 307                 return false;
 308 #ifdef HAVE_IPV6
 309         case AF_INET6:
 310                 if (strcasecmp(fam, "ip") == 0) {
 311                         return true;
 312                 }
 313
 314                 if (strcasecmp(fam, "ipv6") == 0) {
 315                         return true;
 316                 }
 317
 318                 return false;
 319 #endif
 320         }
 321
 322         return false;
 323 }
 324
 325 int _tsocket_address_inet_from_strings(TALLOC_CTX *mem_ctx,
 326                                        const char *fam,
 327                                        const char *addr,
 328                                        uint16_t port,
 329                                        struct tsocket_address **_addr,
 330                                        const char *location)
 331 {
 332         struct addrinfo hints;
 333         struct addrinfo *result = NULL;
 334         char port_str[6];
 335         int ret;
 336
 337         ZERO_STRUCT(hints);
 338         /*
 339          * we use SOCKET_STREAM here to get just one result
 340          * back from getaddrinfo().
 341          */
 342         hints.ai_socktype = SOCK_STREAM;
 343         hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
 344
 345         if (strcasecmp(fam, "ip") == 0) {
 346                 hints.ai_family = AF_UNSPEC;
 347                 if (!addr) {
 348 #ifdef HAVE_IPV6
 349                         addr = "::";
 350 #else
 351                         addr = "0.0.0.0";
 352 #endif
 353                 }
 354         } else if (strcasecmp(fam, "ipv4") == 0) {
 355                 hints.ai_family = AF_INET;
 356                 if (!addr) {
 357                         addr = "0.0.0.0";
 358                 }
 359 #ifdef HAVE_IPV6
 360         } else if (strcasecmp(fam, "ipv6") == 0) {
 361                 hints.ai_family = AF_INET6;
 362                 if (!addr) {
 363                         addr = "::";
 364                 }
 365 #endif
 366         } else {
 367                 errno = EAFNOSUPPORT;
 368                 return -1;
 369         }
 370
 371         snprintf(port_str, sizeof(port_str), "%u", port);
 372
 373         ret = getaddrinfo(addr, port_str, &hints, &result);
 374         if (ret != 0) {
 375                 switch (ret) {
 376                 case EAI_FAIL:
 377                         errno = EINVAL;
 378                         break;
 379                 }
 380                 ret = -1;
 381                 goto done;
 382         }
 383
 384         if (result->ai_socktype != SOCK_STREAM) {
 385                 errno = EINVAL;
 386                 ret = -1;
 387                 goto done;
 388         }
 389
 390         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 391                                                   result->ai_addr,
 392                                                   result->ai_addrlen,
 393                                                   _addr,
 394                                                   location);
 395
 396 done:
 397         if (result) {
 398                 freeaddrinfo(result);
 399         }
 400         return ret;
 401 }
 402
 403 char *tsocket_address_inet_addr_string(const struct tsocket_address *addr,
 404                                        TALLOC_CTX *mem_ctx)
 405 {
 406         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 407                                            struct tsocket_address_bsd);
 408         char addr_str[INET6_ADDRSTRLEN+1];
 409         const char *str;
 410
 411         if (!bsda) {
 412                 errno = EINVAL;
 413                 return NULL;
 414         }
 415
 416         switch (bsda->u.sa.sa_family) {
 417         case AF_INET:
 418                 str = inet_ntop(bsda->u.in.sin_family,
 419                                 &bsda->u.in.sin_addr,
 420                                 addr_str, sizeof(addr_str));
 421                 break;
 422 #ifdef HAVE_IPV6
 423         case AF_INET6:
 424                 str = inet_ntop(bsda->u.in6.sin6_family,
 425                                 &bsda->u.in6.sin6_addr,
 426                                 addr_str, sizeof(addr_str));
 427                 break;
 428 #endif
 429         default:
 430                 errno = EINVAL;
 431                 return NULL;
 432         }
 433
 434         if (!str) {
 435                 return NULL;
 436         }
 437
 438         return talloc_strdup(mem_ctx, str);
 439 }
 440
 441 uint16_t tsocket_address_inet_port(const struct tsocket_address *addr)
 442 {
 443         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 444                                            struct tsocket_address_bsd);
 445         uint16_t port = 0;
 446
 447         if (!bsda) {
 448                 errno = EINVAL;
 449                 return 0;
 450         }
 451
 452         switch (bsda->u.sa.sa_family) {
 453         case AF_INET:
 454                 port = ntohs(bsda->u.in.sin_port);
 455                 break;
 456 #ifdef HAVE_IPV6
 457         case AF_INET6:
 458                 port = ntohs(bsda->u.in6.sin6_port);
 459                 break;
 460 #endif
 461         default:
 462                 errno = EINVAL;
 463                 return 0;
 464         }
 465
 466         return port;
 467 }
 468
 469 int tsocket_address_inet_set_port(struct tsocket_address *addr,
 470                                   uint16_t port)
 471 {
 472         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 473                                            struct tsocket_address_bsd);
 474
 475         if (!bsda) {
 476                 errno = EINVAL;
 477                 return -1;
 478         }
 479
 480         switch (bsda->u.sa.sa_family) {
 481         case AF_INET:
 482                 bsda->u.in.sin_port = htons(port);
 483                 break;
 484 #ifdef HAVE_IPV6
 485         case AF_INET6:
 486                 bsda->u.in6.sin6_port = htons(port);
 487                 break;
 488 #endif
 489         default:
 490                 errno = EINVAL;
 491                 return -1;
 492         }
 493
 494         return 0;
 495 }
 496
 497 bool tsocket_address_is_unix(const struct tsocket_address *addr)
 498 {
 499         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 500                                            struct tsocket_address_bsd);
 501
 502         if (!bsda) {
 503                 return false;
 504         }
 505
 506         switch (bsda->u.sa.sa_family) {
 507         case AF_UNIX:
 508                 return true;
 509         }
 510
 511         return false;
 512 }
 513
 514 int _tsocket_address_unix_from_path(TALLOC_CTX *mem_ctx,
 515                                     const char *path,
 516                                     struct tsocket_address **_addr,
 517                                     const char *location)
 518 {
 519         struct sockaddr_un un;
 520         void *p = &un;
 521         int ret;
 522
 523         if (!path) {
 524                 path = "";
 525         }
 526
 527         if (strlen(path) > sizeof(un.sun_path)-1) {
 528                 errno = ENAMETOOLONG;
 529                 return -1;
 530         }
 531
 532         ZERO_STRUCT(un);
 533         un.sun_family = AF_UNIX;
 534         strncpy(un.sun_path, path, sizeof(un.sun_path)-1);
 535
 536         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 537                                                  (struct sockaddr *)p,
 538                                                  sizeof(un),
 539                                                  _addr,
 540                                                  location);
 541
 542         return ret;
 543 }
 544
 545 char *tsocket_address_unix_path(const struct tsocket_address *addr,
 546                                 TALLOC_CTX *mem_ctx)
 547 {
 548         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 549                                            struct tsocket_address_bsd);
 550         const char *str;
 551
 552         if (!bsda) {
 553                 errno = EINVAL;
 554                 return NULL;
 555         }
 556
 557         switch (bsda->u.sa.sa_family) {
 558         case AF_UNIX:
 559                 str = bsda->u.un.sun_path;
 560                 break;
 561         default:
 562                 errno = EINVAL;
 563                 return NULL;
 564         }
 565
 566         return talloc_strdup(mem_ctx, str);
 567 }
 568
 569 static char *tsocket_address_bsd_string(const struct tsocket_address *addr,
 570                                         TALLOC_CTX *mem_ctx)
 571 {
 572         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 573                                            struct tsocket_address_bsd);
 574         char *str;
 575         char *addr_str;
 576         const char *prefix = NULL;
 577         uint16_t port;
 578
 579         switch (bsda->u.sa.sa_family) {
 580         case AF_UNIX:
 581                 return talloc_asprintf(mem_ctx, "unix:%s",
 582                                        bsda->u.un.sun_path);
 583         case AF_INET:
 584                 prefix = "ipv4";
 585                 break;
 586 #ifdef HAVE_IPV6
 587         case AF_INET6:
 588                 prefix = "ipv6";
 589                 break;
 590 #endif
 591         default:
 592                 errno = EINVAL;
 593                 return NULL;
 594         }
 595
 596         addr_str = tsocket_address_inet_addr_string(addr, mem_ctx);
 597         if (!addr_str) {
 598                 return NULL;
 599         }
 600
 601         port = tsocket_address_inet_port(addr);
 602
 603         str = talloc_asprintf(mem_ctx, "%s:%s:%u",
 604                               prefix, addr_str, port);
 605         talloc_free(addr_str);
 606
 607         return str;
 608 }
 609
 610 static struct tsocket_address *tsocket_address_bsd_copy(const struct tsocket_address *addr,
 611                                                          TALLOC_CTX *mem_ctx,
 612                                                          const char *location)
 613 {
 614         struct tsocket_address_bsd *bsda = talloc_get_type(addr->private_data,
 615                                            struct tsocket_address_bsd);
 616         struct tsocket_address *copy;
 617         int ret;
 618
 619         ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
 620                                                  &bsda->u.sa,
 621                                                  bsda->sa_socklen,
 622                                                  &copy,
 623                                                  location);
 624         if (ret != 0) {
 625                 return NULL;
 626         }
 627
 628         return copy;
 629 }
 630
 631 static const struct tsocket_address_ops tsocket_address_bsd_ops = {
 632         .name           = "bsd",
 633         .string         = tsocket_address_bsd_string,
 634         .copy           = tsocket_address_bsd_copy,
 635 };
 636
 637 struct tdgram_bsd {
 638         int fd;
 639
 640         void *event_ptr;
 641         struct tevent_fd *fde;
 642         bool optimize_recvfrom;
 643
 644         void *readable_private;
 645         void (*readable_handler)(void *private_data);
 646         void *writeable_private;
 647         void (*writeable_handler)(void *private_data);
 648 };
 649
 650 bool tdgram_bsd_optimize_recvfrom(struct tdgram_context *dgram,
 651                                   bool on)
 652 {
 653         struct tdgram_bsd *bsds =
 654                 talloc_get_type(_tdgram_context_data(dgram),
 655                 struct tdgram_bsd);
 656         bool old;
 657
 658         if (bsds == NULL) {
 659                 /* not a bsd socket */
 660                 return false;
 661         }
 662
 663         old = bsds->optimize_recvfrom;
 664         bsds->optimize_recvfrom = on;
 665
 666         return old;
 667 }
 668
 669 static void tdgram_bsd_fde_handler(struct tevent_context *ev,
 670                                    struct tevent_fd *fde,
 671                                    uint16_t flags,
 672                                    void *private_data)
 673 {
 674         struct tdgram_bsd *bsds = talloc_get_type_abort(private_data,
 675                                   struct tdgram_bsd);
 676
 677         if (flags & TEVENT_FD_WRITE) {
 678                 bsds->writeable_handler(bsds->writeable_private);
 679                 return;
 680         }
 681         if (flags & TEVENT_FD_READ) {
 682                 if (!bsds->readable_handler) {
 683                         TEVENT_FD_NOT_READABLE(bsds->fde);
 684                         return;
 685                 }
 686                 bsds->readable_handler(bsds->readable_private);
 687                 return;
 688         }
 689 }
 690
 691 static int tdgram_bsd_set_readable_handler(struct tdgram_bsd *bsds,
 692                                            struct tevent_context *ev,
 693                                            void (*handler)(void *private_data),
 694                                            void *private_data)
 695 {
 696         if (ev == NULL) {
 697                 if (handler) {
 698                         errno = EINVAL;
 699                         return -1;
 700                 }
 701                 if (!bsds->readable_handler) {
 702                         return 0;
 703                 }
 704                 bsds->readable_handler = NULL;
 705                 bsds->readable_private = NULL;
 706
 707                 return 0;
 708         }
 709
 710         /* read and write must use the same tevent_context */
 711         if (bsds->event_ptr != ev) {
 712                 if (bsds->readable_handler || bsds->writeable_handler) {
 713                         errno = EINVAL;
 714                         return -1;
 715                 }
 716                 bsds->event_ptr = NULL;
 717                 TALLOC_FREE(bsds->fde);
 718         }
 719
 720         if (tevent_fd_get_flags(bsds->fde) == 0) {
 721                 TALLOC_FREE(bsds->fde);
 722
 723                 bsds->fde = tevent_add_fd(ev, bsds,
 724                                           bsds->fd, TEVENT_FD_READ,
 725                                           tdgram_bsd_fde_handler,
 726                                           bsds);
 727                 if (!bsds->fde) {
 728                         errno = ENOMEM;
 729                         return -1;
 730                 }
 731
 732                 /* cache the event context we're running on */
 733                 bsds->event_ptr = ev;
 734         } else if (!bsds->readable_handler) {
 735                 TEVENT_FD_READABLE(bsds->fde);
 736         }
 737
 738         bsds->readable_handler = handler;
 739         bsds->readable_private = private_data;
 740
 741         return 0;
 742 }
 743
 744 static int tdgram_bsd_set_writeable_handler(struct tdgram_bsd *bsds,
 745                                             struct tevent_context *ev,
 746                                             void (*handler)(void *private_data),
 747                                             void *private_data)
 748 {
 749         if (ev == NULL) {
 750                 if (handler) {
 751                         errno = EINVAL;
 752                         return -1;
 753                 }
 754                 if (!bsds->writeable_handler) {
 755                         return 0;
 756                 }
 757                 bsds->writeable_handler = NULL;
 758                 bsds->writeable_private = NULL;
 759                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
 760
 761                 return 0;
 762         }
 763
 764         /* read and write must use the same tevent_context */
 765         if (bsds->event_ptr != ev) {
 766                 if (bsds->readable_handler || bsds->writeable_handler) {
 767                         errno = EINVAL;
 768                         return -1;
 769                 }
 770                 bsds->event_ptr = NULL;
 771                 TALLOC_FREE(bsds->fde);
 772         }
 773
 774         if (tevent_fd_get_flags(bsds->fde) == 0) {
 775                 TALLOC_FREE(bsds->fde);
 776
 777                 bsds->fde = tevent_add_fd(ev, bsds,
 778                                           bsds->fd, TEVENT_FD_WRITE,
 779                                           tdgram_bsd_fde_handler,
 780                                           bsds);
 781                 if (!bsds->fde) {
 782                         errno = ENOMEM;
 783                         return -1;
 784                 }
 785
 786                 /* cache the event context we're running on */
 787                 bsds->event_ptr = ev;
 788         } else if (!bsds->writeable_handler) {
 789                 TEVENT_FD_WRITEABLE(bsds->fde);
 790         }
 791
 792         bsds->writeable_handler = handler;
 793         bsds->writeable_private = private_data;
 794
 795         return 0;
 796 }
 797
 798 struct tdgram_bsd_recvfrom_state {
 799         struct tdgram_context *dgram;
 800         bool first_try;
 801         uint8_t *buf;
 802         size_t len;
 803         struct tsocket_address *src;
 804 };
 805
 806 static int tdgram_bsd_recvfrom_destructor(struct tdgram_bsd_recvfrom_state *state)
 807 {
 808         struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
 809                                   struct tdgram_bsd);
 810
 811         tdgram_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
 812
 813         return 0;
 814 }
 815
 816 static void tdgram_bsd_recvfrom_handler(void *private_data);
 817
 818 static struct tevent_req *tdgram_bsd_recvfrom_send(TALLOC_CTX *mem_ctx,
 819                                         struct tevent_context *ev,
 820                                         struct tdgram_context *dgram)
 821 {
 822         struct tevent_req *req;
 823         struct tdgram_bsd_recvfrom_state *state;
 824         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 825         int ret;
 826
 827         req = tevent_req_create(mem_ctx, &state,
 828                                 struct tdgram_bsd_recvfrom_state);
 829         if (!req) {
 830                 return NULL;
 831         }
 832
 833         state->dgram    = dgram;
 834         state->first_try= true;
 835         state->buf      = NULL;
 836         state->len      = 0;
 837         state->src      = NULL;
 838
 839         talloc_set_destructor(state, tdgram_bsd_recvfrom_destructor);
 840
 841         if (bsds->fd == -1) {
 842                 tevent_req_error(req, ENOTCONN);
 843                 goto post;
 844         }
 845
 846
 847         /*
 848          * this is a fast path, not waiting for the
 849          * socket to become explicit readable gains
 850          * about 10%-20% performance in benchmark tests.
 851          */
 852         if (bsds->optimize_recvfrom) {
 853                 /*
 854                  * We only do the optimization on
 855                  * recvfrom if the caller asked for it.
 856                  *
 857                  * This is needed because in most cases
 858                  * we preferr to flush send buffers before
 859                  * receiving incoming requests.
 860                  */
 861                 tdgram_bsd_recvfrom_handler(req);
 862                 if (!tevent_req_is_in_progress(req)) {
 863                         goto post;
 864                 }
 865         }
 866
 867         ret = tdgram_bsd_set_readable_handler(bsds, ev,
 868                                               tdgram_bsd_recvfrom_handler,
 869                                               req);
 870         if (ret == -1) {
 871                 tevent_req_error(req, errno);
 872                 goto post;
 873         }
 874
 875         return req;
 876
 877  post:
 878         tevent_req_post(req, ev);
 879         return req;
 880 }
 881
 882 static void tdgram_bsd_recvfrom_handler(void *private_data)
 883 {
 884         struct tevent_req *req = talloc_get_type_abort(private_data,
 885                                  struct tevent_req);
 886         struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
 887                                         struct tdgram_bsd_recvfrom_state);
 888         struct tdgram_context *dgram = state->dgram;
 889         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
 890         struct tsocket_address_bsd *bsda;
 891         ssize_t ret;
 892         int err;
 893         bool retry;
 894
 895         ret = tsocket_bsd_pending(bsds->fd);
 896         if (state->first_try && ret == 0) {
 897                 state->first_try = false;
 898                 /* retry later */
 899                 return;
 900         }
 901         state->first_try = false;
 902
 903         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
 904         if (retry) {
 905                 /* retry later */
 906                 return;
 907         }
 908         if (tevent_req_error(req, err)) {
 909                 return;
 910         }
 911
 912         /* note that 'ret' can be 0 here */
 913         state->buf = talloc_array(state, uint8_t, ret);
 914         if (tevent_req_nomem(state->buf, req)) {
 915                 return;
 916         }
 917         state->len = ret;
 918
 919         state->src = tsocket_address_create(state,
 920                                             &tsocket_address_bsd_ops,
 921                                             &bsda,
 922                                             struct tsocket_address_bsd,
 923                                             __location__ "bsd_recvfrom");
 924         if (tevent_req_nomem(state->src, req)) {
 925                 return;
 926         }
 927
 928         ZERO_STRUCTP(bsda);
 929         bsda->sa_socklen = sizeof(bsda->u.ss);
 930 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
 931         bsda->u.sa.sa_len = bsda->sa_socklen;
 932 #endif
 933
 934         ret = recvfrom(bsds->fd, state->buf, state->len, 0,
 935                        &bsda->u.sa, &bsda->sa_socklen);
 936         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
 937         if (retry) {
 938                 /* retry later */
 939                 return;
 940         }
 941         if (tevent_req_error(req, err)) {
 942                 return;
 943         }
 944
 945         /*
 946          * Some systems (FreeBSD, see bug #7115) return too much
 947          * bytes in tsocket_bsd_pending()/ioctl(fd, FIONREAD, ...),
 948          * the return value includes some IP/UDP header bytes,
 949          * while recvfrom() just returns the payload.
 950          */
 951         state->buf = talloc_realloc(state, state->buf, uint8_t, ret);
 952         if (tevent_req_nomem(state->buf, req)) {
 953                 return;
 954         }
 955         state->len = ret;
 956
 957         tevent_req_done(req);
 958 }
 959
 960 static ssize_t tdgram_bsd_recvfrom_recv(struct tevent_req *req,
 961                                         int *perrno,
 962                                         TALLOC_CTX *mem_ctx,
 963                                         uint8_t **buf,
 964                                         struct tsocket_address **src)
 965 {
 966         struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
 967                                         struct tdgram_bsd_recvfrom_state);
 968         ssize_t ret;
 969
 970         ret = tsocket_simple_int_recv(req, perrno);
 971         if (ret == 0) {
 972                 *buf = talloc_move(mem_ctx, &state->buf);
 973                 ret = state->len;
 974                 if (src) {
 975                         *src = talloc_move(mem_ctx, &state->src);
 976                 }
 977         }
 978
 979         tevent_req_received(req);
 980         return ret;
 981 }
 982
 983 struct tdgram_bsd_sendto_state {
 984         struct tdgram_context *dgram;
 985
 986         const uint8_t *buf;
 987         size_t len;
 988         const struct tsocket_address *dst;
 989
 990         ssize_t ret;
 991 };
 992
 993 static int tdgram_bsd_sendto_destructor(struct tdgram_bsd_sendto_state *state)
 994 {
 995         struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
 996                                   struct tdgram_bsd);
 997
 998         tdgram_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
 999
1000         return 0;
1001 }
1002
1003 static void tdgram_bsd_sendto_handler(void *private_data);
1004
1005 static struct tevent_req *tdgram_bsd_sendto_send(TALLOC_CTX *mem_ctx,
1006                                                  struct tevent_context *ev,
1007                                                  struct tdgram_context *dgram,
1008                                                  const uint8_t *buf,
1009                                                  size_t len,
1010                                                  const struct tsocket_address *dst)
1011 {
1012         struct tevent_req *req;
1013         struct tdgram_bsd_sendto_state *state;
1014         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1015         int ret;
1016
1017         req = tevent_req_create(mem_ctx, &state,
1018                                 struct tdgram_bsd_sendto_state);
1019         if (!req) {
1020                 return NULL;
1021         }
1022
1023         state->dgram    = dgram;
1024         state->buf      = buf;
1025         state->len      = len;
1026         state->dst      = dst;
1027         state->ret      = -1;
1028
1029         talloc_set_destructor(state, tdgram_bsd_sendto_destructor);
1030
1031         if (bsds->fd == -1) {
1032                 tevent_req_error(req, ENOTCONN);
1033                 goto post;
1034         }
1035
1036         /*
1037          * this is a fast path, not waiting for the
1038          * socket to become explicit writeable gains
1039          * about 10%-20% performance in benchmark tests.
1040          */
1041         tdgram_bsd_sendto_handler(req);
1042         if (!tevent_req_is_in_progress(req)) {
1043                 goto post;
1044         }
1045
1046         ret = tdgram_bsd_set_writeable_handler(bsds, ev,
1047                                                tdgram_bsd_sendto_handler,
1048                                                req);
1049         if (ret == -1) {
1050                 tevent_req_error(req, errno);
1051                 goto post;
1052         }
1053
1054         return req;
1055
1056  post:
1057         tevent_req_post(req, ev);
1058         return req;
1059 }
1060
1061 static void tdgram_bsd_sendto_handler(void *private_data)
1062 {
1063         struct tevent_req *req = talloc_get_type_abort(private_data,
1064                                  struct tevent_req);
1065         struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1066                                         struct tdgram_bsd_sendto_state);
1067         struct tdgram_context *dgram = state->dgram;
1068         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1069         struct sockaddr *sa = NULL;
1070         socklen_t sa_socklen = 0;
1071         ssize_t ret;
1072         int err;
1073         bool retry;
1074
1075         if (state->dst) {
1076                 struct tsocket_address_bsd *bsda =
1077                         talloc_get_type(state->dst->private_data,
1078                         struct tsocket_address_bsd);
1079
1080                 sa = &bsda->u.sa;
1081                 sa_socklen = bsda->sa_socklen;
1082         }
1083
1084         ret = sendto(bsds->fd, state->buf, state->len, 0, sa, sa_socklen);
1085         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1086         if (retry) {
1087                 /* retry later */
1088                 return;
1089         }
1090
1091         if (err == EMSGSIZE) {
1092                 /* round up in 1K increments */
1093                 int bufsize = ((state->len + 1023) & (~1023));
1094
1095                 ret = setsockopt(bsds->fd, SOL_SOCKET, SO_SNDBUF, &bufsize,
1096                                  sizeof(bufsize));
1097                 if (ret == 0) {
1098                         /*
1099                          * We do the retry here, rather then via the
1100                          * handler, as we only want to retry once for
1101                          * this condition, so if there is a mismatch
1102                          * between what setsockopt() accepts and what can
1103                          * actually be sent, we do not end up in a
1104                          * loop.
1105                          */
1106
1107                         ret = sendto(bsds->fd, state->buf, state->len,
1108                                      0, sa, sa_socklen);
1109                         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1110                         if (retry) { /* retry later */
1111                                 return;
1112                         }
1113                 }
1114         }
1115
1116         if (tevent_req_error(req, err)) {
1117                 return;
1118         }
1119
1120         state->ret = ret;
1121
1122         tevent_req_done(req);
1123 }
1124
1125 static ssize_t tdgram_bsd_sendto_recv(struct tevent_req *req, int *perrno)
1126 {
1127         struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
1128                                         struct tdgram_bsd_sendto_state);
1129         ssize_t ret;
1130
1131         ret = tsocket_simple_int_recv(req, perrno);
1132         if (ret == 0) {
1133                 ret = state->ret;
1134         }
1135
1136         tevent_req_received(req);
1137         return ret;
1138 }
1139
1140 struct tdgram_bsd_disconnect_state {
1141         uint8_t __dummy;
1142 };
1143
1144 static struct tevent_req *tdgram_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1145                                                      struct tevent_context *ev,
1146                                                      struct tdgram_context *dgram)
1147 {
1148         struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
1149         struct tevent_req *req;
1150         struct tdgram_bsd_disconnect_state *state;
1151         int ret;
1152         int err;
1153         bool dummy;
1154
1155         req = tevent_req_create(mem_ctx, &state,
1156                                 struct tdgram_bsd_disconnect_state);
1157         if (req == NULL) {
1158                 return NULL;
1159         }
1160
1161         if (bsds->fd == -1) {
1162                 tevent_req_error(req, ENOTCONN);
1163                 goto post;
1164         }
1165
1166         TALLOC_FREE(bsds->fde);
1167         ret = close(bsds->fd);
1168         bsds->fd = -1;
1169         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1170         if (tevent_req_error(req, err)) {
1171                 goto post;
1172         }
1173
1174         tevent_req_done(req);
1175 post:
1176         tevent_req_post(req, ev);
1177         return req;
1178 }
1179
1180 static int tdgram_bsd_disconnect_recv(struct tevent_req *req,
1181                                       int *perrno)
1182 {
1183         int ret;
1184
1185         ret = tsocket_simple_int_recv(req, perrno);
1186
1187         tevent_req_received(req);
1188         return ret;
1189 }
1190
1191 static const struct tdgram_context_ops tdgram_bsd_ops = {
1192         .name                   = "bsd",
1193
1194         .recvfrom_send          = tdgram_bsd_recvfrom_send,
1195         .recvfrom_recv          = tdgram_bsd_recvfrom_recv,
1196
1197         .sendto_send            = tdgram_bsd_sendto_send,
1198         .sendto_recv            = tdgram_bsd_sendto_recv,
1199
1200         .disconnect_send        = tdgram_bsd_disconnect_send,
1201         .disconnect_recv        = tdgram_bsd_disconnect_recv,
1202 };
1203
1204 static int tdgram_bsd_destructor(struct tdgram_bsd *bsds)
1205 {
1206         TALLOC_FREE(bsds->fde);
1207         if (bsds->fd != -1) {
1208                 close(bsds->fd);
1209                 bsds->fd = -1;
1210         }
1211         return 0;
1212 }
1213
1214 static int tdgram_bsd_dgram_socket(const struct tsocket_address *local,
1215                                    const struct tsocket_address *remote,
1216                                    bool broadcast,
1217                                    TALLOC_CTX *mem_ctx,
1218                                    struct tdgram_context **_dgram,
1219                                    const char *location)
1220 {
1221         struct tsocket_address_bsd *lbsda =
1222                 talloc_get_type_abort(local->private_data,
1223                 struct tsocket_address_bsd);
1224         struct tsocket_address_bsd *rbsda = NULL;
1225         struct tdgram_context *dgram;
1226         struct tdgram_bsd *bsds;
1227         int fd;
1228         int ret;
1229         bool do_bind = false;
1230         bool do_reuseaddr = false;
1231         bool do_ipv6only = false;
1232         bool is_inet = false;
1233         int sa_fam = lbsda->u.sa.sa_family;
1234
1235         if (remote) {
1236                 rbsda = talloc_get_type_abort(remote->private_data,
1237                         struct tsocket_address_bsd);
1238         }
1239
1240         switch (lbsda->u.sa.sa_family) {
1241         case AF_UNIX:
1242                 if (broadcast) {
1243                         errno = EINVAL;
1244                         return -1;
1245                 }
1246                 if (lbsda->u.un.sun_path[0] != 0) {
1247                         do_reuseaddr = true;
1248                         do_bind = true;
1249                 }
1250                 break;
1251         case AF_INET:
1252                 if (lbsda->u.in.sin_port != 0) {
1253                         do_reuseaddr = true;
1254                         do_bind = true;
1255                 }
1256                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
1257                         do_bind = true;
1258                 }
1259                 is_inet = true;
1260                 break;
1261 #ifdef HAVE_IPV6
1262         case AF_INET6:
1263                 if (lbsda->u.in6.sin6_port != 0) {
1264                         do_reuseaddr = true;
1265                         do_bind = true;
1266                 }
1267                 if (memcmp(&in6addr_any,
1268                            &lbsda->u.in6.sin6_addr,
1269                            sizeof(in6addr_any)) != 0) {
1270                         do_bind = true;
1271                 }
1272                 is_inet = true;
1273                 do_ipv6only = true;
1274                 break;
1275 #endif
1276         default:
1277                 errno = EINVAL;
1278                 return -1;
1279         }
1280
1281         if (!do_bind && is_inet && rbsda) {
1282                 sa_fam = rbsda->u.sa.sa_family;
1283                 switch (sa_fam) {
1284                 case AF_INET:
1285                         do_ipv6only = false;
1286                         break;
1287 #ifdef HAVE_IPV6
1288                 case AF_INET6:
1289                         do_ipv6only = true;
1290                         break;
1291 #endif
1292                 }
1293         }
1294
1295         fd = socket(sa_fam, SOCK_DGRAM, 0);
1296         if (fd < 0) {
1297                 return -1;
1298         }
1299
1300         fd = tsocket_bsd_common_prepare_fd(fd, true);
1301         if (fd < 0) {
1302                 return -1;
1303         }
1304
1305         dgram = tdgram_context_create(mem_ctx,
1306                                       &tdgram_bsd_ops,
1307                                       &bsds,
1308                                       struct tdgram_bsd,
1309                                       location);
1310         if (!dgram) {
1311                 int saved_errno = errno;
1312                 close(fd);
1313                 errno = saved_errno;
1314                 return -1;
1315         }
1316         ZERO_STRUCTP(bsds);
1317         bsds->fd = fd;
1318         talloc_set_destructor(bsds, tdgram_bsd_destructor);
1319
1320 #ifdef HAVE_IPV6
1321         if (do_ipv6only) {
1322                 int val = 1;
1323
1324                 ret = setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
1325                                  (const void *)&val, sizeof(val));
1326                 if (ret == -1) {
1327                         int saved_errno = errno;
1328                         talloc_free(dgram);
1329                         errno = saved_errno;
1330                         return -1;
1331                 }
1332         }
1333 #endif
1334
1335         if (broadcast) {
1336                 int val = 1;
1337
1338                 ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
1339                                  (const void *)&val, sizeof(val));
1340                 if (ret == -1) {
1341                         int saved_errno = errno;
1342                         talloc_free(dgram);
1343                         errno = saved_errno;
1344                         return -1;
1345                 }
1346         }
1347
1348         if (do_reuseaddr) {
1349                 int val = 1;
1350
1351                 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1352                                  (const void *)&val, sizeof(val));
1353                 if (ret == -1) {
1354                         int saved_errno = errno;
1355                         talloc_free(dgram);
1356                         errno = saved_errno;
1357                         return -1;
1358                 }
1359         }
1360
1361         if (do_bind) {
1362                 ret = bind(fd, &lbsda->u.sa, lbsda->sa_socklen);
1363                 if (ret == -1) {
1364                         int saved_errno = errno;
1365                         talloc_free(dgram);
1366                         errno = saved_errno;
1367                         return -1;
1368                 }
1369         }
1370
1371         if (rbsda) {
1372                 if (rbsda->u.sa.sa_family != sa_fam) {
1373                         talloc_free(dgram);
1374                         errno = EINVAL;
1375                         return -1;
1376                 }
1377
1378                 ret = connect(fd, &rbsda->u.sa, rbsda->sa_socklen);
1379                 if (ret == -1) {
1380                         int saved_errno = errno;
1381                         talloc_free(dgram);
1382                         errno = saved_errno;
1383                         return -1;
1384                 }
1385         }
1386
1387         *_dgram = dgram;
1388         return 0;
1389 }
1390
1391 int _tdgram_bsd_existing_socket(TALLOC_CTX *mem_ctx,
1392                                 int fd,
1393                                 struct tdgram_context **_dgram,
1394                                 const char *location)
1395 {
1396         struct tdgram_context *dgram;
1397         struct tdgram_bsd *bsds;
1398
1399         dgram = tdgram_context_create(mem_ctx,
1400                                       &tdgram_bsd_ops,
1401                                       &bsds,
1402                                       struct tdgram_bsd,
1403                                       location);
1404         if (!dgram) {
1405                 return -1;
1406         }
1407         ZERO_STRUCTP(bsds);
1408         bsds->fd = fd;
1409         talloc_set_destructor(bsds, tdgram_bsd_destructor);
1410
1411         *_dgram = dgram;
1412         return 0;
1413 }
1414
1415 int _tdgram_inet_udp_socket(const struct tsocket_address *local,
1416                             const struct tsocket_address *remote,
1417                             TALLOC_CTX *mem_ctx,
1418                             struct tdgram_context **dgram,
1419                             const char *location)
1420 {
1421         struct tsocket_address_bsd *lbsda =
1422                 talloc_get_type_abort(local->private_data,
1423                 struct tsocket_address_bsd);
1424         int ret;
1425
1426         switch (lbsda->u.sa.sa_family) {
1427         case AF_INET:
1428                 break;
1429 #ifdef HAVE_IPV6
1430         case AF_INET6:
1431                 break;
1432 #endif
1433         default:
1434                 errno = EINVAL;
1435                 return -1;
1436         }
1437
1438         ret = tdgram_bsd_dgram_socket(local, remote, false,
1439                                       mem_ctx, dgram, location);
1440
1441         return ret;
1442 }
1443
1444 int _tdgram_unix_socket(const struct tsocket_address *local,
1445                         const struct tsocket_address *remote,
1446                         TALLOC_CTX *mem_ctx,
1447                         struct tdgram_context **dgram,
1448                         const char *location)
1449 {
1450         struct tsocket_address_bsd *lbsda =
1451                 talloc_get_type_abort(local->private_data,
1452                 struct tsocket_address_bsd);
1453         int ret;
1454
1455         switch (lbsda->u.sa.sa_family) {
1456         case AF_UNIX:
1457                 break;
1458         default:
1459                 errno = EINVAL;
1460                 return -1;
1461         }
1462
1463         ret = tdgram_bsd_dgram_socket(local, remote, false,
1464                                       mem_ctx, dgram, location);
1465
1466         return ret;
1467 }
1468
1469 struct tstream_bsd {
1470         int fd;
1471
1472         void *event_ptr;
1473         struct tevent_fd *fde;
1474         bool optimize_readv;
1475
1476         void *readable_private;
1477         void (*readable_handler)(void *private_data);
1478         void *writeable_private;
1479         void (*writeable_handler)(void *private_data);
1480 };
1481
1482 bool tstream_bsd_optimize_readv(struct tstream_context *stream,
1483                                 bool on)
1484 {
1485         struct tstream_bsd *bsds =
1486                 talloc_get_type(_tstream_context_data(stream),
1487                 struct tstream_bsd);
1488         bool old;
1489
1490         if (bsds == NULL) {
1491                 /* not a bsd socket */
1492                 return false;
1493         }
1494
1495         old = bsds->optimize_readv;
1496         bsds->optimize_readv = on;
1497
1498         return old;
1499 }
1500
1501 static void tstream_bsd_fde_handler(struct tevent_context *ev,
1502                                     struct tevent_fd *fde,
1503                                     uint16_t flags,
1504                                     void *private_data)
1505 {
1506         struct tstream_bsd *bsds = talloc_get_type_abort(private_data,
1507                                    struct tstream_bsd);
1508
1509         if (flags & TEVENT_FD_WRITE) {
1510                 bsds->writeable_handler(bsds->writeable_private);
1511                 return;
1512         }
1513         if (flags & TEVENT_FD_READ) {
1514                 if (!bsds->readable_handler) {
1515                         if (bsds->writeable_handler) {
1516                                 bsds->writeable_handler(bsds->writeable_private);
1517                                 return;
1518                         }
1519                         TEVENT_FD_NOT_READABLE(bsds->fde);
1520                         return;
1521                 }
1522                 bsds->readable_handler(bsds->readable_private);
1523                 return;
1524         }
1525 }
1526
1527 static int tstream_bsd_set_readable_handler(struct tstream_bsd *bsds,
1528                                             struct tevent_context *ev,
1529                                             void (*handler)(void *private_data),
1530                                             void *private_data)
1531 {
1532         if (ev == NULL) {
1533                 if (handler) {
1534                         errno = EINVAL;
1535                         return -1;
1536                 }
1537                 if (!bsds->readable_handler) {
1538                         return 0;
1539                 }
1540                 bsds->readable_handler = NULL;
1541                 bsds->readable_private = NULL;
1542
1543                 return 0;
1544         }
1545
1546         /* read and write must use the same tevent_context */
1547         if (bsds->event_ptr != ev) {
1548                 if (bsds->readable_handler || bsds->writeable_handler) {
1549                         errno = EINVAL;
1550                         return -1;
1551                 }
1552                 bsds->event_ptr = NULL;
1553                 TALLOC_FREE(bsds->fde);
1554         }
1555
1556         if (tevent_fd_get_flags(bsds->fde) == 0) {
1557                 TALLOC_FREE(bsds->fde);
1558
1559                 bsds->fde = tevent_add_fd(ev, bsds,
1560                                           bsds->fd, TEVENT_FD_READ,
1561                                           tstream_bsd_fde_handler,
1562                                           bsds);
1563                 if (!bsds->fde) {
1564                         errno = ENOMEM;
1565                         return -1;
1566                 }
1567
1568                 /* cache the event context we're running on */
1569                 bsds->event_ptr = ev;
1570         } else if (!bsds->readable_handler) {
1571                 TEVENT_FD_READABLE(bsds->fde);
1572         }
1573
1574         bsds->readable_handler = handler;
1575         bsds->readable_private = private_data;
1576
1577         return 0;
1578 }
1579
1580 static int tstream_bsd_set_writeable_handler(struct tstream_bsd *bsds,
1581                                              struct tevent_context *ev,
1582                                              void (*handler)(void *private_data),
1583                                              void *private_data)
1584 {
1585         if (ev == NULL) {
1586                 if (handler) {
1587                         errno = EINVAL;
1588                         return -1;
1589                 }
1590                 if (!bsds->writeable_handler) {
1591                         return 0;
1592                 }
1593                 bsds->writeable_handler = NULL;
1594                 bsds->writeable_private = NULL;
1595                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
1596
1597                 return 0;
1598         }
1599
1600         /* read and write must use the same tevent_context */
1601         if (bsds->event_ptr != ev) {
1602                 if (bsds->readable_handler || bsds->writeable_handler) {
1603                         errno = EINVAL;
1604                         return -1;
1605                 }
1606                 bsds->event_ptr = NULL;
1607                 TALLOC_FREE(bsds->fde);
1608         }
1609
1610         if (tevent_fd_get_flags(bsds->fde) == 0) {
1611                 TALLOC_FREE(bsds->fde);
1612
1613                 bsds->fde = tevent_add_fd(ev, bsds,
1614                                           bsds->fd,
1615                                           TEVENT_FD_READ | TEVENT_FD_WRITE,
1616                                           tstream_bsd_fde_handler,
1617                                           bsds);
1618                 if (!bsds->fde) {
1619                         errno = ENOMEM;
1620                         return -1;
1621                 }
1622
1623                 /* cache the event context we're running on */
1624                 bsds->event_ptr = ev;
1625         } else if (!bsds->writeable_handler) {
1626                 uint16_t flags = tevent_fd_get_flags(bsds->fde);
1627                 flags |= TEVENT_FD_READ | TEVENT_FD_WRITE;
1628                 tevent_fd_set_flags(bsds->fde, flags);
1629         }
1630
1631         bsds->writeable_handler = handler;
1632         bsds->writeable_private = private_data;
1633
1634         return 0;
1635 }
1636
1637 static ssize_t tstream_bsd_pending_bytes(struct tstream_context *stream)
1638 {
1639         struct tstream_bsd *bsds = tstream_context_data(stream,
1640                                    struct tstream_bsd);
1641         ssize_t ret;
1642
1643         if (bsds->fd == -1) {
1644                 errno = ENOTCONN;
1645                 return -1;
1646         }
1647
1648         ret = tsocket_bsd_pending(bsds->fd);
1649
1650         return ret;
1651 }
1652
1653 struct tstream_bsd_readv_state {
1654         struct tstream_context *stream;
1655
1656         struct iovec *vector;
1657         size_t count;
1658
1659         int ret;
1660 };
1661
1662 static int tstream_bsd_readv_destructor(struct tstream_bsd_readv_state *state)
1663 {
1664         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1665                                    struct tstream_bsd);
1666
1667         tstream_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
1668
1669         return 0;
1670 }
1671
1672 static void tstream_bsd_readv_handler(void *private_data);
1673
1674 static struct tevent_req *tstream_bsd_readv_send(TALLOC_CTX *mem_ctx,
1675                                         struct tevent_context *ev,
1676                                         struct tstream_context *stream,
1677                                         struct iovec *vector,
1678                                         size_t count)
1679 {
1680         struct tevent_req *req;
1681         struct tstream_bsd_readv_state *state;
1682         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1683         int ret;
1684
1685         req = tevent_req_create(mem_ctx, &state,
1686                                 struct tstream_bsd_readv_state);
1687         if (!req) {
1688                 return NULL;
1689         }
1690
1691         state->stream   = stream;
1692         /* we make a copy of the vector so that we can modify it */
1693         state->vector   = talloc_array(state, struct iovec, count);
1694         if (tevent_req_nomem(state->vector, req)) {
1695                 goto post;
1696         }
1697         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1698         state->count    = count;
1699         state->ret      = 0;
1700
1701         talloc_set_destructor(state, tstream_bsd_readv_destructor);
1702
1703         if (bsds->fd == -1) {
1704                 tevent_req_error(req, ENOTCONN);
1705                 goto post;
1706         }
1707
1708         /*
1709          * this is a fast path, not waiting for the
1710          * socket to become explicit readable gains
1711          * about 10%-20% performance in benchmark tests.
1712          */
1713         if (bsds->optimize_readv) {
1714                 /*
1715                  * We only do the optimization on
1716                  * readv if the caller asked for it.
1717                  *
1718                  * This is needed because in most cases
1719                  * we preferr to flush send buffers before
1720                  * receiving incoming requests.
1721                  */
1722                 tstream_bsd_readv_handler(req);
1723                 if (!tevent_req_is_in_progress(req)) {
1724                         goto post;
1725                 }
1726         }
1727
1728         ret = tstream_bsd_set_readable_handler(bsds, ev,
1729                                               tstream_bsd_readv_handler,
1730                                               req);
1731         if (ret == -1) {
1732                 tevent_req_error(req, errno);
1733                 goto post;
1734         }
1735
1736         return req;
1737
1738  post:
1739         tevent_req_post(req, ev);
1740         return req;
1741 }
1742
1743 static void tstream_bsd_readv_handler(void *private_data)
1744 {
1745         struct tevent_req *req = talloc_get_type_abort(private_data,
1746                                  struct tevent_req);
1747         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1748                                         struct tstream_bsd_readv_state);
1749         struct tstream_context *stream = state->stream;
1750         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1751         int ret;
1752         int err;
1753         int _count;
1754         bool ok, retry;
1755
1756         ret = readv(bsds->fd, state->vector, state->count);
1757         if (ret == 0) {
1758                 /* propagate end of file */
1759                 tevent_req_error(req, EPIPE);
1760                 return;
1761         }
1762         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1763         if (retry) {
1764                 /* retry later */
1765                 return;
1766         }
1767         if (tevent_req_error(req, err)) {
1768                 return;
1769         }
1770
1771         state->ret += ret;
1772
1773         _count = state->count; /* tstream has size_t count, readv has int */
1774         ok = iov_advance(&state->vector, &_count, ret);
1775         state->count = _count;
1776
1777         if (!ok) {
1778                 tevent_req_error(req, EINVAL);
1779                 return;
1780         }
1781
1782         if (state->count > 0) {
1783                 /* we have more to read */
1784                 return;
1785         }
1786
1787         tevent_req_done(req);
1788 }
1789
1790 static int tstream_bsd_readv_recv(struct tevent_req *req,
1791                                   int *perrno)
1792 {
1793         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1794                                         struct tstream_bsd_readv_state);
1795         int ret;
1796
1797         ret = tsocket_simple_int_recv(req, perrno);
1798         if (ret == 0) {
1799                 ret = state->ret;
1800         }
1801
1802         tevent_req_received(req);
1803         return ret;
1804 }
1805
1806 struct tstream_bsd_writev_state {
1807         struct tstream_context *stream;
1808
1809         struct iovec *vector;
1810         size_t count;
1811
1812         int ret;
1813 };
1814
1815 static int tstream_bsd_writev_destructor(struct tstream_bsd_writev_state *state)
1816 {
1817         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1818                                   struct tstream_bsd);
1819
1820         tstream_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
1821
1822         return 0;
1823 }
1824
1825 static void tstream_bsd_writev_handler(void *private_data);
1826
1827 static struct tevent_req *tstream_bsd_writev_send(TALLOC_CTX *mem_ctx,
1828                                                  struct tevent_context *ev,
1829                                                  struct tstream_context *stream,
1830                                                  const struct iovec *vector,
1831                                                  size_t count)
1832 {
1833         struct tevent_req *req;
1834         struct tstream_bsd_writev_state *state;
1835         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1836         int ret;
1837
1838         req = tevent_req_create(mem_ctx, &state,
1839                                 struct tstream_bsd_writev_state);
1840         if (!req) {
1841                 return NULL;
1842         }
1843
1844         state->stream   = stream;
1845         /* we make a copy of the vector so that we can modify it */
1846         state->vector   = talloc_array(state, struct iovec, count);
1847         if (tevent_req_nomem(state->vector, req)) {
1848                 goto post;
1849         }
1850         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1851         state->count    = count;
1852         state->ret      = 0;
1853
1854         talloc_set_destructor(state, tstream_bsd_writev_destructor);
1855
1856         if (bsds->fd == -1) {
1857                 tevent_req_error(req, ENOTCONN);
1858                 goto post;
1859         }
1860
1861         /*
1862          * this is a fast path, not waiting for the
1863          * socket to become explicit writeable gains
1864          * about 10%-20% performance in benchmark tests.
1865          */
1866         tstream_bsd_writev_handler(req);
1867         if (!tevent_req_is_in_progress(req)) {
1868                 goto post;
1869         }
1870
1871         ret = tstream_bsd_set_writeable_handler(bsds, ev,
1872                                                tstream_bsd_writev_handler,
1873                                                req);
1874         if (ret == -1) {
1875                 tevent_req_error(req, errno);
1876                 goto post;
1877         }
1878
1879         return req;
1880
1881  post:
1882         tevent_req_post(req, ev);
1883         return req;
1884 }
1885
1886 static void tstream_bsd_writev_handler(void *private_data)
1887 {
1888         struct tevent_req *req = talloc_get_type_abort(private_data,
1889                                  struct tevent_req);
1890         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1891                                         struct tstream_bsd_writev_state);
1892         struct tstream_context *stream = state->stream;
1893         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1894         ssize_t ret;
1895         int err;
1896         int _count;
1897         bool ok, retry;
1898
1899         ret = writev(bsds->fd, state->vector, state->count);
1900         if (ret == 0) {
1901                 /* propagate end of file */
1902                 tevent_req_error(req, EPIPE);
1903                 return;
1904         }
1905         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1906         if (retry) {
1907                 /* retry later */
1908                 return;
1909         }
1910         if (tevent_req_error(req, err)) {
1911                 return;
1912         }
1913
1914         state->ret += ret;
1915
1916         _count = state->count; /* tstream has size_t count, writev has int */
1917         ok = iov_advance(&state->vector, &_count, ret);
1918         state->count = _count;
1919
1920         if (!ok) {
1921                 tevent_req_error(req, EINVAL);
1922                 return;
1923         }
1924
1925         if (state->count > 0) {
1926                 /* we have more to read */
1927                 return;
1928         }
1929
1930         tevent_req_done(req);
1931 }
1932
1933 static int tstream_bsd_writev_recv(struct tevent_req *req, int *perrno)
1934 {
1935         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1936                                         struct tstream_bsd_writev_state);
1937         int ret;
1938
1939         ret = tsocket_simple_int_recv(req, perrno);
1940         if (ret == 0) {
1941                 ret = state->ret;
1942         }
1943
1944         tevent_req_received(req);
1945         return ret;
1946 }
1947
1948 struct tstream_bsd_disconnect_state {
1949         void *__dummy;
1950 };
1951
1952 static struct tevent_req *tstream_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1953                                                      struct tevent_context *ev,
1954                                                      struct tstream_context *stream)
1955 {
1956         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1957         struct tevent_req *req;
1958         struct tstream_bsd_disconnect_state *state;
1959         int ret;
1960         int err;
1961         bool dummy;
1962
1963         req = tevent_req_create(mem_ctx, &state,
1964                                 struct tstream_bsd_disconnect_state);
1965         if (req == NULL) {
1966                 return NULL;
1967         }
1968
1969         if (bsds->fd == -1) {
1970                 tevent_req_error(req, ENOTCONN);
1971                 goto post;
1972         }
1973
1974         TALLOC_FREE(bsds->fde);
1975         ret = close(bsds->fd);
1976         bsds->fd = -1;
1977         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
1978         if (tevent_req_error(req, err)) {
1979                 goto post;
1980         }
1981
1982         tevent_req_done(req);
1983 post:
1984         tevent_req_post(req, ev);
1985         return req;
1986 }
1987
1988 static int tstream_bsd_disconnect_recv(struct tevent_req *req,
1989                                       int *perrno)
1990 {
1991         int ret;
1992
1993         ret = tsocket_simple_int_recv(req, perrno);
1994
1995         tevent_req_received(req);
1996         return ret;
1997 }
1998
1999 static const struct tstream_context_ops tstream_bsd_ops = {
2000         .name                   = "bsd",
2001
2002         .pending_bytes          = tstream_bsd_pending_bytes,
2003
2004         .readv_send             = tstream_bsd_readv_send,
2005         .readv_recv             = tstream_bsd_readv_recv,
2006
2007         .writev_send            = tstream_bsd_writev_send,
2008         .writev_recv            = tstream_bsd_writev_recv,
2009
2010         .disconnect_send        = tstream_bsd_disconnect_send,
2011         .disconnect_recv        = tstream_bsd_disconnect_recv,
2012 };
2013
2014 static int tstream_bsd_destructor(struct tstream_bsd *bsds)
2015 {
2016         TALLOC_FREE(bsds->fde);
2017         if (bsds->fd != -1) {
2018                 close(bsds->fd);
2019                 bsds->fd = -1;
2020         }
2021         return 0;
2022 }
2023
2024 int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx,
2025                                  int fd,
2026                                  struct tstream_context **_stream,
2027                                  const char *location)
2028 {
2029         struct tstream_context *stream;
2030         struct tstream_bsd *bsds;
2031
2032         stream = tstream_context_create(mem_ctx,
2033                                         &tstream_bsd_ops,
2034                                         &bsds,
2035                                         struct tstream_bsd,
2036                                         location);
2037         if (!stream) {
2038                 return -1;
2039         }
2040         ZERO_STRUCTP(bsds);
2041         bsds->fd = fd;
2042         talloc_set_destructor(bsds, tstream_bsd_destructor);
2043
2044         *_stream = stream;
2045         return 0;
2046 }
2047
2048 struct tstream_bsd_connect_state {
2049         int fd;
2050         struct tevent_fd *fde;
2051         struct tstream_conext *stream;
2052         struct tsocket_address *local;
2053 };
2054
2055 static int tstream_bsd_connect_destructor(struct tstream_bsd_connect_state *state)
2056 {
2057         TALLOC_FREE(state->fde);
2058         if (state->fd != -1) {
2059                 close(state->fd);
2060                 state->fd = -1;
2061         }
2062
2063         return 0;
2064 }
2065
2066 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2067                                             struct tevent_fd *fde,
2068                                             uint16_t flags,
2069                                             void *private_data);
2070
2071 static struct tevent_req *tstream_bsd_connect_send(TALLOC_CTX *mem_ctx,
2072                                         struct tevent_context *ev,
2073                                         int sys_errno,
2074                                         const struct tsocket_address *local,
2075                                         const struct tsocket_address *remote)
2076 {
2077         struct tevent_req *req;
2078         struct tstream_bsd_connect_state *state;
2079         struct tsocket_address_bsd *lbsda =
2080                 talloc_get_type_abort(local->private_data,
2081                 struct tsocket_address_bsd);
2082         struct tsocket_address_bsd *lrbsda = NULL;
2083         struct tsocket_address_bsd *rbsda =
2084                 talloc_get_type_abort(remote->private_data,
2085                 struct tsocket_address_bsd);
2086         int ret;
2087         int err;
2088         bool retry;
2089         bool do_bind = false;
2090         bool do_reuseaddr = false;
2091         bool do_ipv6only = false;
2092         bool is_inet = false;
2093         int sa_fam = lbsda->u.sa.sa_family;
2094
2095         req = tevent_req_create(mem_ctx, &state,
2096                                 struct tstream_bsd_connect_state);
2097         if (!req) {
2098                 return NULL;
2099         }
2100         state->fd = -1;
2101         state->fde = NULL;
2102
2103         talloc_set_destructor(state, tstream_bsd_connect_destructor);
2104
2105         /* give the wrappers a chance to report an error */
2106         if (sys_errno != 0) {
2107                 tevent_req_error(req, sys_errno);
2108                 goto post;
2109         }
2110
2111         switch (lbsda->u.sa.sa_family) {
2112         case AF_UNIX:
2113                 if (lbsda->u.un.sun_path[0] != 0) {
2114                         do_reuseaddr = true;
2115                         do_bind = true;
2116                 }
2117                 break;
2118         case AF_INET:
2119                 if (lbsda->u.in.sin_port != 0) {
2120                         do_reuseaddr = true;
2121                         do_bind = true;
2122                 }
2123                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
2124                         do_bind = true;
2125                 }
2126                 is_inet = true;
2127                 break;
2128 #ifdef HAVE_IPV6
2129         case AF_INET6:
2130                 if (lbsda->u.in6.sin6_port != 0) {
2131                         do_reuseaddr = true;
2132                         do_bind = true;
2133                 }
2134                 if (memcmp(&in6addr_any,
2135                            &lbsda->u.in6.sin6_addr,
2136                            sizeof(in6addr_any)) != 0) {
2137                         do_bind = true;
2138                 }
2139                 is_inet = true;
2140                 do_ipv6only = true;
2141                 break;
2142 #endif
2143         default:
2144                 tevent_req_error(req, EINVAL);
2145                 goto post;
2146         }
2147
2148         if (!do_bind && is_inet) {
2149                 sa_fam = rbsda->u.sa.sa_family;
2150                 switch (sa_fam) {
2151                 case AF_INET:
2152                         do_ipv6only = false;
2153                         break;
2154 #ifdef HAVE_IPV6
2155                 case AF_INET6:
2156                         do_ipv6only = true;
2157                         break;
2158 #endif
2159                 }
2160         }
2161
2162         if (is_inet) {
2163                 state->local = tsocket_address_create(state,
2164                                                       &tsocket_address_bsd_ops,
2165                                                       &lrbsda,
2166                                                       struct tsocket_address_bsd,
2167                                                       __location__ "bsd_connect");
2168                 if (tevent_req_nomem(state->local, req)) {
2169                         goto post;
2170                 }
2171
2172                 ZERO_STRUCTP(lrbsda);
2173                 lrbsda->sa_socklen = sizeof(lrbsda->u.ss);
2174 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
2175                 lrbsda->u.sa.sa_len = lrbsda->sa_socklen;
2176 #endif
2177         }
2178
2179         state->fd = socket(sa_fam, SOCK_STREAM, 0);
2180         if (state->fd == -1) {
2181                 tevent_req_error(req, errno);
2182                 goto post;
2183         }
2184
2185         state->fd = tsocket_bsd_common_prepare_fd(state->fd, true);
2186         if (state->fd == -1) {
2187                 tevent_req_error(req, errno);
2188                 goto post;
2189         }
2190
2191 #ifdef HAVE_IPV6
2192         if (do_ipv6only) {
2193                 int val = 1;
2194
2195                 ret = setsockopt(state->fd, IPPROTO_IPV6, IPV6_V6ONLY,
2196                                  (const void *)&val, sizeof(val));
2197                 if (ret == -1) {
2198                         tevent_req_error(req, errno);
2199                         goto post;
2200                 }
2201         }
2202 #endif
2203
2204         if (do_reuseaddr) {
2205                 int val = 1;
2206
2207                 ret = setsockopt(state->fd, SOL_SOCKET, SO_REUSEADDR,
2208                                  (const void *)&val, sizeof(val));
2209                 if (ret == -1) {
2210                         tevent_req_error(req, errno);
2211                         goto post;
2212                 }
2213         }
2214
2215         if (do_bind) {
2216                 ret = bind(state->fd, &lbsda->u.sa, lbsda->sa_socklen);
2217                 if (ret == -1) {
2218                         tevent_req_error(req, errno);
2219                         goto post;
2220                 }
2221         }
2222
2223         if (rbsda->u.sa.sa_family != sa_fam) {
2224                 tevent_req_error(req, EINVAL);
2225                 goto post;
2226         }
2227
2228         ret = connect(state->fd, &rbsda->u.sa, rbsda->sa_socklen);
2229         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2230         if (retry) {
2231                 /* retry later */
2232                 goto async;
2233         }
2234         if (tevent_req_error(req, err)) {
2235                 goto post;
2236         }
2237
2238         if (!state->local) {
2239                 tevent_req_done(req);
2240                 goto post;
2241         }
2242
2243         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2244         if (ret == -1) {
2245                 tevent_req_error(req, errno);
2246                 goto post;
2247         }
2248
2249         tevent_req_done(req);
2250         goto post;
2251
2252  async:
2253         state->fde = tevent_add_fd(ev, state,
2254                                    state->fd,
2255                                    TEVENT_FD_READ | TEVENT_FD_WRITE,
2256                                    tstream_bsd_connect_fde_handler,
2257                                    req);
2258         if (tevent_req_nomem(state->fde, req)) {
2259                 goto post;
2260         }
2261
2262         return req;
2263
2264  post:
2265         tevent_req_post(req, ev);
2266         return req;
2267 }
2268
2269 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2270                                             struct tevent_fd *fde,
2271                                             uint16_t flags,
2272                                             void *private_data)
2273 {
2274         struct tevent_req *req = talloc_get_type_abort(private_data,
2275                                  struct tevent_req);
2276         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2277                                         struct tstream_bsd_connect_state);
2278         struct tsocket_address_bsd *lrbsda = NULL;
2279         int ret;
2280         int error=0;
2281         socklen_t len = sizeof(error);
2282         int err;
2283         bool retry;
2284
2285         ret = getsockopt(state->fd, SOL_SOCKET, SO_ERROR, &error, &len);
2286         if (ret == 0) {
2287                 if (error != 0) {
2288                         errno = error;
2289                         ret = -1;
2290                 }
2291         }
2292         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2293         if (retry) {
2294                 /* retry later */
2295                 return;
2296         }
2297         if (tevent_req_error(req, err)) {
2298                 return;
2299         }
2300
2301         if (!state->local) {
2302                 tevent_req_done(req);
2303                 return;
2304         }
2305
2306         lrbsda = talloc_get_type_abort(state->local->private_data,
2307                                        struct tsocket_address_bsd);
2308
2309         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2310         if (ret == -1) {
2311                 tevent_req_error(req, errno);
2312                 return;
2313         }
2314
2315         tevent_req_done(req);
2316 }
2317
2318 static int tstream_bsd_connect_recv(struct tevent_req *req,
2319                                     int *perrno,
2320                                     TALLOC_CTX *mem_ctx,
2321                                     struct tstream_context **stream,
2322                                     struct tsocket_address **local,
2323                                     const char *location)
2324 {
2325         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2326                                         struct tstream_bsd_connect_state);
2327         int ret;
2328
2329         ret = tsocket_simple_int_recv(req, perrno);
2330         if (ret == 0) {
2331                 ret = _tstream_bsd_existing_socket(mem_ctx,
2332                                                    state->fd,
2333                                                    stream,
2334                                                    location);
2335                 if (ret == -1) {
2336                         *perrno = errno;
2337                         goto done;
2338                 }
2339                 TALLOC_FREE(state->fde);
2340                 state->fd = -1;
2341
2342                 if (local) {
2343                         *local = talloc_move(mem_ctx, &state->local);
2344                 }
2345         }
2346
2347 done:
2348         tevent_req_received(req);
2349         return ret;
2350 }
2351
2352 struct tevent_req * tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx,
2353                                         struct tevent_context *ev,
2354                                         const struct tsocket_address *local,
2355                                         const struct tsocket_address *remote)
2356 {
2357         struct tsocket_address_bsd *lbsda =
2358                 talloc_get_type_abort(local->private_data,
2359                 struct tsocket_address_bsd);
2360         struct tevent_req *req;
2361         int sys_errno = 0;
2362
2363         switch (lbsda->u.sa.sa_family) {
2364         case AF_INET:
2365                 break;
2366 #ifdef HAVE_IPV6
2367         case AF_INET6:
2368                 break;
2369 #endif
2370         default:
2371                 sys_errno = EINVAL;
2372                 break;
2373         }
2374
2375         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2376
2377         return req;
2378 }
2379
2380 int _tstream_inet_tcp_connect_recv(struct tevent_req *req,
2381                                    int *perrno,
2382                                    TALLOC_CTX *mem_ctx,
2383                                    struct tstream_context **stream,
2384                                    struct tsocket_address **local,
2385                                    const char *location)
2386 {
2387         return tstream_bsd_connect_recv(req, perrno,
2388                                         mem_ctx, stream, local,
2389                                         location);
2390 }
2391
2392 struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx,
2393                                         struct tevent_context *ev,
2394                                         const struct tsocket_address *local,
2395                                         const struct tsocket_address *remote)
2396 {
2397         struct tsocket_address_bsd *lbsda =
2398                 talloc_get_type_abort(local->private_data,
2399                 struct tsocket_address_bsd);
2400         struct tevent_req *req;
2401         int sys_errno = 0;
2402
2403         switch (lbsda->u.sa.sa_family) {
2404         case AF_UNIX:
2405                 break;
2406         default:
2407                 sys_errno = EINVAL;
2408                 break;
2409         }
2410
2411         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2412
2413         return req;
2414 }
2415
2416 int _tstream_unix_connect_recv(struct tevent_req *req,
2417                                       int *perrno,
2418                                       TALLOC_CTX *mem_ctx,
2419                                       struct tstream_context **stream,
2420                                       const char *location)
2421 {
2422         return tstream_bsd_connect_recv(req, perrno,
2423                                         mem_ctx, stream, NULL,
2424                                         location);
2425 }
2426
2427 int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1,
2428                              struct tstream_context **_stream1,
2429                              TALLOC_CTX *mem_ctx2,
2430                              struct tstream_context **_stream2,
2431                              const char *location)
2432 {
2433         int ret;
2434         int fds[2];
2435         int fd1;
2436         int fd2;
2437         struct tstream_context *stream1 = NULL;
2438         struct tstream_context *stream2 = NULL;
2439
2440         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
2441         if (ret == -1) {
2442                 return -1;
2443         }
2444         fd1 = fds[0];
2445         fd2 = fds[1];
2446
2447         fd1 = tsocket_bsd_common_prepare_fd(fd1, true);
2448         if (fd1 == -1) {
2449                 int sys_errno = errno;
2450                 close(fd2);
2451                 errno = sys_errno;
2452                 return -1;
2453         }
2454
2455         fd2 = tsocket_bsd_common_prepare_fd(fd2, true);
2456         if (fd2 == -1) {
2457                 int sys_errno = errno;
2458                 close(fd1);
2459                 errno = sys_errno;
2460                 return -1;
2461         }
2462
2463         ret = _tstream_bsd_existing_socket(mem_ctx1,
2464                                            fd1,
2465                                            &stream1,
2466                                            location);
2467         if (ret == -1) {
2468                 int sys_errno = errno;
2469                 close(fd1);
2470                 close(fd2);
2471                 errno = sys_errno;
2472                 return -1;
2473         }
2474
2475         ret = _tstream_bsd_existing_socket(mem_ctx2,
2476                                            fd2,
2477                                            &stream2,
2478                                            location);
2479         if (ret == -1) {
2480                 int sys_errno = errno;
2481                 talloc_free(stream1);
2482                 close(fd2);
2483                 errno = sys_errno;
2484                 return -1;
2485         }
2486
2487         *_stream1 = stream1;
2488         *_stream2 = stream2;
2489         return 0;
2490 }
2491