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 prefer 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_inet_udp_broadcast_socket(const struct tsocket_address *local,
1445                                       TALLOC_CTX *mem_ctx,
1446                                       struct tdgram_context **dgram,
1447                                       const char *location)
1448 {
1449         struct tsocket_address_bsd *lbsda =
1450                 talloc_get_type_abort(local->private_data,
1451                 struct tsocket_address_bsd);
1452         int ret;
1453
1454         switch (lbsda->u.sa.sa_family) {
1455         case AF_INET:
1456                 break;
1457 #ifdef HAVE_IPV6
1458         case AF_INET6:
1459                 /* only ipv4 */
1460                 errno = EINVAL;
1461                 return -1;
1462 #endif
1463         default:
1464                 errno = EINVAL;
1465                 return -1;
1466         }
1467
1468         ret = tdgram_bsd_dgram_socket(local, NULL, true,
1469                                       mem_ctx, dgram, location);
1470
1471         return ret;
1472 }
1473
1474 int _tdgram_unix_socket(const struct tsocket_address *local,
1475                         const struct tsocket_address *remote,
1476                         TALLOC_CTX *mem_ctx,
1477                         struct tdgram_context **dgram,
1478                         const char *location)
1479 {
1480         struct tsocket_address_bsd *lbsda =
1481                 talloc_get_type_abort(local->private_data,
1482                 struct tsocket_address_bsd);
1483         int ret;
1484
1485         switch (lbsda->u.sa.sa_family) {
1486         case AF_UNIX:
1487                 break;
1488         default:
1489                 errno = EINVAL;
1490                 return -1;
1491         }
1492
1493         ret = tdgram_bsd_dgram_socket(local, remote, false,
1494                                       mem_ctx, dgram, location);
1495
1496         return ret;
1497 }
1498
1499 struct tstream_bsd {
1500         int fd;
1501
1502         void *event_ptr;
1503         struct tevent_fd *fde;
1504         bool optimize_readv;
1505
1506         void *readable_private;
1507         void (*readable_handler)(void *private_data);
1508         void *writeable_private;
1509         void (*writeable_handler)(void *private_data);
1510 };
1511
1512 bool tstream_bsd_optimize_readv(struct tstream_context *stream,
1513                                 bool on)
1514 {
1515         struct tstream_bsd *bsds =
1516                 talloc_get_type(_tstream_context_data(stream),
1517                 struct tstream_bsd);
1518         bool old;
1519
1520         if (bsds == NULL) {
1521                 /* not a bsd socket */
1522                 return false;
1523         }
1524
1525         old = bsds->optimize_readv;
1526         bsds->optimize_readv = on;
1527
1528         return old;
1529 }
1530
1531 static void tstream_bsd_fde_handler(struct tevent_context *ev,
1532                                     struct tevent_fd *fde,
1533                                     uint16_t flags,
1534                                     void *private_data)
1535 {
1536         struct tstream_bsd *bsds = talloc_get_type_abort(private_data,
1537                                    struct tstream_bsd);
1538
1539         if (flags & TEVENT_FD_WRITE) {
1540                 bsds->writeable_handler(bsds->writeable_private);
1541                 return;
1542         }
1543         if (flags & TEVENT_FD_READ) {
1544                 if (!bsds->readable_handler) {
1545                         if (bsds->writeable_handler) {
1546                                 bsds->writeable_handler(bsds->writeable_private);
1547                                 return;
1548                         }
1549                         TEVENT_FD_NOT_READABLE(bsds->fde);
1550                         return;
1551                 }
1552                 bsds->readable_handler(bsds->readable_private);
1553                 return;
1554         }
1555 }
1556
1557 static int tstream_bsd_set_readable_handler(struct tstream_bsd *bsds,
1558                                             struct tevent_context *ev,
1559                                             void (*handler)(void *private_data),
1560                                             void *private_data)
1561 {
1562         if (ev == NULL) {
1563                 if (handler) {
1564                         errno = EINVAL;
1565                         return -1;
1566                 }
1567                 if (!bsds->readable_handler) {
1568                         return 0;
1569                 }
1570                 bsds->readable_handler = NULL;
1571                 bsds->readable_private = NULL;
1572
1573                 return 0;
1574         }
1575
1576         /* read and write must use the same tevent_context */
1577         if (bsds->event_ptr != ev) {
1578                 if (bsds->readable_handler || bsds->writeable_handler) {
1579                         errno = EINVAL;
1580                         return -1;
1581                 }
1582                 bsds->event_ptr = NULL;
1583                 TALLOC_FREE(bsds->fde);
1584         }
1585
1586         if (tevent_fd_get_flags(bsds->fde) == 0) {
1587                 TALLOC_FREE(bsds->fde);
1588
1589                 bsds->fde = tevent_add_fd(ev, bsds,
1590                                           bsds->fd, TEVENT_FD_READ,
1591                                           tstream_bsd_fde_handler,
1592                                           bsds);
1593                 if (!bsds->fde) {
1594                         errno = ENOMEM;
1595                         return -1;
1596                 }
1597
1598                 /* cache the event context we're running on */
1599                 bsds->event_ptr = ev;
1600         } else if (!bsds->readable_handler) {
1601                 TEVENT_FD_READABLE(bsds->fde);
1602         }
1603
1604         bsds->readable_handler = handler;
1605         bsds->readable_private = private_data;
1606
1607         return 0;
1608 }
1609
1610 static int tstream_bsd_set_writeable_handler(struct tstream_bsd *bsds,
1611                                              struct tevent_context *ev,
1612                                              void (*handler)(void *private_data),
1613                                              void *private_data)
1614 {
1615         if (ev == NULL) {
1616                 if (handler) {
1617                         errno = EINVAL;
1618                         return -1;
1619                 }
1620                 if (!bsds->writeable_handler) {
1621                         return 0;
1622                 }
1623                 bsds->writeable_handler = NULL;
1624                 bsds->writeable_private = NULL;
1625                 TEVENT_FD_NOT_WRITEABLE(bsds->fde);
1626
1627                 return 0;
1628         }
1629
1630         /* read and write must use the same tevent_context */
1631         if (bsds->event_ptr != ev) {
1632                 if (bsds->readable_handler || bsds->writeable_handler) {
1633                         errno = EINVAL;
1634                         return -1;
1635                 }
1636                 bsds->event_ptr = NULL;
1637                 TALLOC_FREE(bsds->fde);
1638         }
1639
1640         if (tevent_fd_get_flags(bsds->fde) == 0) {
1641                 TALLOC_FREE(bsds->fde);
1642
1643                 bsds->fde = tevent_add_fd(ev, bsds,
1644                                           bsds->fd,
1645                                           TEVENT_FD_READ | TEVENT_FD_WRITE,
1646                                           tstream_bsd_fde_handler,
1647                                           bsds);
1648                 if (!bsds->fde) {
1649                         errno = ENOMEM;
1650                         return -1;
1651                 }
1652
1653                 /* cache the event context we're running on */
1654                 bsds->event_ptr = ev;
1655         } else if (!bsds->writeable_handler) {
1656                 uint16_t flags = tevent_fd_get_flags(bsds->fde);
1657                 flags |= TEVENT_FD_READ | TEVENT_FD_WRITE;
1658                 tevent_fd_set_flags(bsds->fde, flags);
1659         }
1660
1661         bsds->writeable_handler = handler;
1662         bsds->writeable_private = private_data;
1663
1664         return 0;
1665 }
1666
1667 static ssize_t tstream_bsd_pending_bytes(struct tstream_context *stream)
1668 {
1669         struct tstream_bsd *bsds = tstream_context_data(stream,
1670                                    struct tstream_bsd);
1671         ssize_t ret;
1672
1673         if (bsds->fd == -1) {
1674                 errno = ENOTCONN;
1675                 return -1;
1676         }
1677
1678         ret = tsocket_bsd_pending(bsds->fd);
1679
1680         return ret;
1681 }
1682
1683 struct tstream_bsd_readv_state {
1684         struct tstream_context *stream;
1685
1686         struct iovec *vector;
1687         size_t count;
1688
1689         int ret;
1690 };
1691
1692 static int tstream_bsd_readv_destructor(struct tstream_bsd_readv_state *state)
1693 {
1694         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1695                                    struct tstream_bsd);
1696
1697         tstream_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
1698
1699         return 0;
1700 }
1701
1702 static void tstream_bsd_readv_handler(void *private_data);
1703
1704 static struct tevent_req *tstream_bsd_readv_send(TALLOC_CTX *mem_ctx,
1705                                         struct tevent_context *ev,
1706                                         struct tstream_context *stream,
1707                                         struct iovec *vector,
1708                                         size_t count)
1709 {
1710         struct tevent_req *req;
1711         struct tstream_bsd_readv_state *state;
1712         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1713         int ret;
1714
1715         req = tevent_req_create(mem_ctx, &state,
1716                                 struct tstream_bsd_readv_state);
1717         if (!req) {
1718                 return NULL;
1719         }
1720
1721         state->stream   = stream;
1722         /* we make a copy of the vector so that we can modify it */
1723         state->vector   = talloc_array(state, struct iovec, count);
1724         if (tevent_req_nomem(state->vector, req)) {
1725                 goto post;
1726         }
1727         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1728         state->count    = count;
1729         state->ret      = 0;
1730
1731         talloc_set_destructor(state, tstream_bsd_readv_destructor);
1732
1733         if (bsds->fd == -1) {
1734                 tevent_req_error(req, ENOTCONN);
1735                 goto post;
1736         }
1737
1738         /*
1739          * this is a fast path, not waiting for the
1740          * socket to become explicit readable gains
1741          * about 10%-20% performance in benchmark tests.
1742          */
1743         if (bsds->optimize_readv) {
1744                 /*
1745                  * We only do the optimization on
1746                  * readv if the caller asked for it.
1747                  *
1748                  * This is needed because in most cases
1749                  * we prefer to flush send buffers before
1750                  * receiving incoming requests.
1751                  */
1752                 tstream_bsd_readv_handler(req);
1753                 if (!tevent_req_is_in_progress(req)) {
1754                         goto post;
1755                 }
1756         }
1757
1758         ret = tstream_bsd_set_readable_handler(bsds, ev,
1759                                               tstream_bsd_readv_handler,
1760                                               req);
1761         if (ret == -1) {
1762                 tevent_req_error(req, errno);
1763                 goto post;
1764         }
1765
1766         return req;
1767
1768  post:
1769         tevent_req_post(req, ev);
1770         return req;
1771 }
1772
1773 static void tstream_bsd_readv_handler(void *private_data)
1774 {
1775         struct tevent_req *req = talloc_get_type_abort(private_data,
1776                                  struct tevent_req);
1777         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1778                                         struct tstream_bsd_readv_state);
1779         struct tstream_context *stream = state->stream;
1780         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1781         int ret;
1782         int err;
1783         int _count;
1784         bool ok, retry;
1785
1786         ret = readv(bsds->fd, state->vector, state->count);
1787         if (ret == 0) {
1788                 /* propagate end of file */
1789                 tevent_req_error(req, EPIPE);
1790                 return;
1791         }
1792         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1793         if (retry) {
1794                 /* retry later */
1795                 return;
1796         }
1797         if (tevent_req_error(req, err)) {
1798                 return;
1799         }
1800
1801         state->ret += ret;
1802
1803         _count = state->count; /* tstream has size_t count, readv has int */
1804         ok = iov_advance(&state->vector, &_count, ret);
1805         state->count = _count;
1806
1807         if (!ok) {
1808                 tevent_req_error(req, EINVAL);
1809                 return;
1810         }
1811
1812         if (state->count > 0) {
1813                 /* we have more to read */
1814                 return;
1815         }
1816
1817         tevent_req_done(req);
1818 }
1819
1820 static int tstream_bsd_readv_recv(struct tevent_req *req,
1821                                   int *perrno)
1822 {
1823         struct tstream_bsd_readv_state *state = tevent_req_data(req,
1824                                         struct tstream_bsd_readv_state);
1825         int ret;
1826
1827         ret = tsocket_simple_int_recv(req, perrno);
1828         if (ret == 0) {
1829                 ret = state->ret;
1830         }
1831
1832         tevent_req_received(req);
1833         return ret;
1834 }
1835
1836 struct tstream_bsd_writev_state {
1837         struct tstream_context *stream;
1838
1839         struct iovec *vector;
1840         size_t count;
1841
1842         int ret;
1843 };
1844
1845 static int tstream_bsd_writev_destructor(struct tstream_bsd_writev_state *state)
1846 {
1847         struct tstream_bsd *bsds = tstream_context_data(state->stream,
1848                                   struct tstream_bsd);
1849
1850         tstream_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
1851
1852         return 0;
1853 }
1854
1855 static void tstream_bsd_writev_handler(void *private_data);
1856
1857 static struct tevent_req *tstream_bsd_writev_send(TALLOC_CTX *mem_ctx,
1858                                                  struct tevent_context *ev,
1859                                                  struct tstream_context *stream,
1860                                                  const struct iovec *vector,
1861                                                  size_t count)
1862 {
1863         struct tevent_req *req;
1864         struct tstream_bsd_writev_state *state;
1865         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1866         int ret;
1867
1868         req = tevent_req_create(mem_ctx, &state,
1869                                 struct tstream_bsd_writev_state);
1870         if (!req) {
1871                 return NULL;
1872         }
1873
1874         state->stream   = stream;
1875         /* we make a copy of the vector so that we can modify it */
1876         state->vector   = talloc_array(state, struct iovec, count);
1877         if (tevent_req_nomem(state->vector, req)) {
1878                 goto post;
1879         }
1880         memcpy(state->vector, vector, sizeof(struct iovec)*count);
1881         state->count    = count;
1882         state->ret      = 0;
1883
1884         talloc_set_destructor(state, tstream_bsd_writev_destructor);
1885
1886         if (bsds->fd == -1) {
1887                 tevent_req_error(req, ENOTCONN);
1888                 goto post;
1889         }
1890
1891         /*
1892          * this is a fast path, not waiting for the
1893          * socket to become explicit writeable gains
1894          * about 10%-20% performance in benchmark tests.
1895          */
1896         tstream_bsd_writev_handler(req);
1897         if (!tevent_req_is_in_progress(req)) {
1898                 goto post;
1899         }
1900
1901         ret = tstream_bsd_set_writeable_handler(bsds, ev,
1902                                                tstream_bsd_writev_handler,
1903                                                req);
1904         if (ret == -1) {
1905                 tevent_req_error(req, errno);
1906                 goto post;
1907         }
1908
1909         return req;
1910
1911  post:
1912         tevent_req_post(req, ev);
1913         return req;
1914 }
1915
1916 static void tstream_bsd_writev_handler(void *private_data)
1917 {
1918         struct tevent_req *req = talloc_get_type_abort(private_data,
1919                                  struct tevent_req);
1920         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1921                                         struct tstream_bsd_writev_state);
1922         struct tstream_context *stream = state->stream;
1923         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1924         ssize_t ret;
1925         int err;
1926         int _count;
1927         bool ok, retry;
1928
1929         ret = writev(bsds->fd, state->vector, state->count);
1930         if (ret == 0) {
1931                 /* propagate end of file */
1932                 tevent_req_error(req, EPIPE);
1933                 return;
1934         }
1935         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
1936         if (retry) {
1937                 /* retry later */
1938                 return;
1939         }
1940         if (tevent_req_error(req, err)) {
1941                 return;
1942         }
1943
1944         state->ret += ret;
1945
1946         _count = state->count; /* tstream has size_t count, writev has int */
1947         ok = iov_advance(&state->vector, &_count, ret);
1948         state->count = _count;
1949
1950         if (!ok) {
1951                 tevent_req_error(req, EINVAL);
1952                 return;
1953         }
1954
1955         if (state->count > 0) {
1956                 /* we have more to read */
1957                 return;
1958         }
1959
1960         tevent_req_done(req);
1961 }
1962
1963 static int tstream_bsd_writev_recv(struct tevent_req *req, int *perrno)
1964 {
1965         struct tstream_bsd_writev_state *state = tevent_req_data(req,
1966                                         struct tstream_bsd_writev_state);
1967         int ret;
1968
1969         ret = tsocket_simple_int_recv(req, perrno);
1970         if (ret == 0) {
1971                 ret = state->ret;
1972         }
1973
1974         tevent_req_received(req);
1975         return ret;
1976 }
1977
1978 struct tstream_bsd_disconnect_state {
1979         void *__dummy;
1980 };
1981
1982 static struct tevent_req *tstream_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
1983                                                      struct tevent_context *ev,
1984                                                      struct tstream_context *stream)
1985 {
1986         struct tstream_bsd *bsds = tstream_context_data(stream, struct tstream_bsd);
1987         struct tevent_req *req;
1988         struct tstream_bsd_disconnect_state *state;
1989         int ret;
1990         int err;
1991         bool dummy;
1992
1993         req = tevent_req_create(mem_ctx, &state,
1994                                 struct tstream_bsd_disconnect_state);
1995         if (req == NULL) {
1996                 return NULL;
1997         }
1998
1999         if (bsds->fd == -1) {
2000                 tevent_req_error(req, ENOTCONN);
2001                 goto post;
2002         }
2003
2004         TALLOC_FREE(bsds->fde);
2005         ret = close(bsds->fd);
2006         bsds->fd = -1;
2007         err = tsocket_bsd_error_from_errno(ret, errno, &dummy);
2008         if (tevent_req_error(req, err)) {
2009                 goto post;
2010         }
2011
2012         tevent_req_done(req);
2013 post:
2014         tevent_req_post(req, ev);
2015         return req;
2016 }
2017
2018 static int tstream_bsd_disconnect_recv(struct tevent_req *req,
2019                                       int *perrno)
2020 {
2021         int ret;
2022
2023         ret = tsocket_simple_int_recv(req, perrno);
2024
2025         tevent_req_received(req);
2026         return ret;
2027 }
2028
2029 static const struct tstream_context_ops tstream_bsd_ops = {
2030         .name                   = "bsd",
2031
2032         .pending_bytes          = tstream_bsd_pending_bytes,
2033
2034         .readv_send             = tstream_bsd_readv_send,
2035         .readv_recv             = tstream_bsd_readv_recv,
2036
2037         .writev_send            = tstream_bsd_writev_send,
2038         .writev_recv            = tstream_bsd_writev_recv,
2039
2040         .disconnect_send        = tstream_bsd_disconnect_send,
2041         .disconnect_recv        = tstream_bsd_disconnect_recv,
2042 };
2043
2044 static int tstream_bsd_destructor(struct tstream_bsd *bsds)
2045 {
2046         TALLOC_FREE(bsds->fde);
2047         if (bsds->fd != -1) {
2048                 close(bsds->fd);
2049                 bsds->fd = -1;
2050         }
2051         return 0;
2052 }
2053
2054 int _tstream_bsd_existing_socket(TALLOC_CTX *mem_ctx,
2055                                  int fd,
2056                                  struct tstream_context **_stream,
2057                                  const char *location)
2058 {
2059         struct tstream_context *stream;
2060         struct tstream_bsd *bsds;
2061
2062         stream = tstream_context_create(mem_ctx,
2063                                         &tstream_bsd_ops,
2064                                         &bsds,
2065                                         struct tstream_bsd,
2066                                         location);
2067         if (!stream) {
2068                 return -1;
2069         }
2070         ZERO_STRUCTP(bsds);
2071         bsds->fd = fd;
2072         talloc_set_destructor(bsds, tstream_bsd_destructor);
2073
2074         *_stream = stream;
2075         return 0;
2076 }
2077
2078 struct tstream_bsd_connect_state {
2079         int fd;
2080         struct tevent_fd *fde;
2081         struct tstream_conext *stream;
2082         struct tsocket_address *local;
2083 };
2084
2085 static int tstream_bsd_connect_destructor(struct tstream_bsd_connect_state *state)
2086 {
2087         TALLOC_FREE(state->fde);
2088         if (state->fd != -1) {
2089                 close(state->fd);
2090                 state->fd = -1;
2091         }
2092
2093         return 0;
2094 }
2095
2096 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2097                                             struct tevent_fd *fde,
2098                                             uint16_t flags,
2099                                             void *private_data);
2100
2101 static struct tevent_req *tstream_bsd_connect_send(TALLOC_CTX *mem_ctx,
2102                                         struct tevent_context *ev,
2103                                         int sys_errno,
2104                                         const struct tsocket_address *local,
2105                                         const struct tsocket_address *remote)
2106 {
2107         struct tevent_req *req;
2108         struct tstream_bsd_connect_state *state;
2109         struct tsocket_address_bsd *lbsda =
2110                 talloc_get_type_abort(local->private_data,
2111                 struct tsocket_address_bsd);
2112         struct tsocket_address_bsd *lrbsda = NULL;
2113         struct tsocket_address_bsd *rbsda =
2114                 talloc_get_type_abort(remote->private_data,
2115                 struct tsocket_address_bsd);
2116         int ret;
2117         int err;
2118         bool retry;
2119         bool do_bind = false;
2120         bool do_reuseaddr = false;
2121         bool do_ipv6only = false;
2122         bool is_inet = false;
2123         int sa_fam = lbsda->u.sa.sa_family;
2124
2125         req = tevent_req_create(mem_ctx, &state,
2126                                 struct tstream_bsd_connect_state);
2127         if (!req) {
2128                 return NULL;
2129         }
2130         state->fd = -1;
2131         state->fde = NULL;
2132
2133         talloc_set_destructor(state, tstream_bsd_connect_destructor);
2134
2135         /* give the wrappers a chance to report an error */
2136         if (sys_errno != 0) {
2137                 tevent_req_error(req, sys_errno);
2138                 goto post;
2139         }
2140
2141         switch (lbsda->u.sa.sa_family) {
2142         case AF_UNIX:
2143                 if (lbsda->u.un.sun_path[0] != 0) {
2144                         do_reuseaddr = true;
2145                         do_bind = true;
2146                 }
2147                 break;
2148         case AF_INET:
2149                 if (lbsda->u.in.sin_port != 0) {
2150                         do_reuseaddr = true;
2151                         do_bind = true;
2152                 }
2153                 if (lbsda->u.in.sin_addr.s_addr != INADDR_ANY) {
2154                         do_bind = true;
2155                 }
2156                 is_inet = true;
2157                 break;
2158 #ifdef HAVE_IPV6
2159         case AF_INET6:
2160                 if (lbsda->u.in6.sin6_port != 0) {
2161                         do_reuseaddr = true;
2162                         do_bind = true;
2163                 }
2164                 if (memcmp(&in6addr_any,
2165                            &lbsda->u.in6.sin6_addr,
2166                            sizeof(in6addr_any)) != 0) {
2167                         do_bind = true;
2168                 }
2169                 is_inet = true;
2170                 do_ipv6only = true;
2171                 break;
2172 #endif
2173         default:
2174                 tevent_req_error(req, EINVAL);
2175                 goto post;
2176         }
2177
2178         if (!do_bind && is_inet) {
2179                 sa_fam = rbsda->u.sa.sa_family;
2180                 switch (sa_fam) {
2181                 case AF_INET:
2182                         do_ipv6only = false;
2183                         break;
2184 #ifdef HAVE_IPV6
2185                 case AF_INET6:
2186                         do_ipv6only = true;
2187                         break;
2188 #endif
2189                 }
2190         }
2191
2192         if (is_inet) {
2193                 state->local = tsocket_address_create(state,
2194                                                       &tsocket_address_bsd_ops,
2195                                                       &lrbsda,
2196                                                       struct tsocket_address_bsd,
2197                                                       __location__ "bsd_connect");
2198                 if (tevent_req_nomem(state->local, req)) {
2199                         goto post;
2200                 }
2201
2202                 ZERO_STRUCTP(lrbsda);
2203                 lrbsda->sa_socklen = sizeof(lrbsda->u.ss);
2204 #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
2205                 lrbsda->u.sa.sa_len = lrbsda->sa_socklen;
2206 #endif
2207         }
2208
2209         state->fd = socket(sa_fam, SOCK_STREAM, 0);
2210         if (state->fd == -1) {
2211                 tevent_req_error(req, errno);
2212                 goto post;
2213         }
2214
2215         state->fd = tsocket_bsd_common_prepare_fd(state->fd, true);
2216         if (state->fd == -1) {
2217                 tevent_req_error(req, errno);
2218                 goto post;
2219         }
2220
2221 #ifdef HAVE_IPV6
2222         if (do_ipv6only) {
2223                 int val = 1;
2224
2225                 ret = setsockopt(state->fd, IPPROTO_IPV6, IPV6_V6ONLY,
2226                                  (const void *)&val, sizeof(val));
2227                 if (ret == -1) {
2228                         tevent_req_error(req, errno);
2229                         goto post;
2230                 }
2231         }
2232 #endif
2233
2234         if (do_reuseaddr) {
2235                 int val = 1;
2236
2237                 ret = setsockopt(state->fd, SOL_SOCKET, SO_REUSEADDR,
2238                                  (const void *)&val, sizeof(val));
2239                 if (ret == -1) {
2240                         tevent_req_error(req, errno);
2241                         goto post;
2242                 }
2243         }
2244
2245         if (do_bind) {
2246                 ret = bind(state->fd, &lbsda->u.sa, lbsda->sa_socklen);
2247                 if (ret == -1) {
2248                         tevent_req_error(req, errno);
2249                         goto post;
2250                 }
2251         }
2252
2253         if (rbsda->u.sa.sa_family != sa_fam) {
2254                 tevent_req_error(req, EINVAL);
2255                 goto post;
2256         }
2257
2258         ret = connect(state->fd, &rbsda->u.sa, rbsda->sa_socklen);
2259         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2260         if (retry) {
2261                 /* retry later */
2262                 goto async;
2263         }
2264         if (tevent_req_error(req, err)) {
2265                 goto post;
2266         }
2267
2268         if (!state->local) {
2269                 tevent_req_done(req);
2270                 goto post;
2271         }
2272
2273         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2274         if (ret == -1) {
2275                 tevent_req_error(req, errno);
2276                 goto post;
2277         }
2278
2279         tevent_req_done(req);
2280         goto post;
2281
2282  async:
2283         state->fde = tevent_add_fd(ev, state,
2284                                    state->fd,
2285                                    TEVENT_FD_READ | TEVENT_FD_WRITE,
2286                                    tstream_bsd_connect_fde_handler,
2287                                    req);
2288         if (tevent_req_nomem(state->fde, req)) {
2289                 goto post;
2290         }
2291
2292         return req;
2293
2294  post:
2295         tevent_req_post(req, ev);
2296         return req;
2297 }
2298
2299 static void tstream_bsd_connect_fde_handler(struct tevent_context *ev,
2300                                             struct tevent_fd *fde,
2301                                             uint16_t flags,
2302                                             void *private_data)
2303 {
2304         struct tevent_req *req = talloc_get_type_abort(private_data,
2305                                  struct tevent_req);
2306         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2307                                         struct tstream_bsd_connect_state);
2308         struct tsocket_address_bsd *lrbsda = NULL;
2309         int ret;
2310         int error=0;
2311         socklen_t len = sizeof(error);
2312         int err;
2313         bool retry;
2314
2315         ret = getsockopt(state->fd, SOL_SOCKET, SO_ERROR, &error, &len);
2316         if (ret == 0) {
2317                 if (error != 0) {
2318                         errno = error;
2319                         ret = -1;
2320                 }
2321         }
2322         err = tsocket_bsd_error_from_errno(ret, errno, &retry);
2323         if (retry) {
2324                 /* retry later */
2325                 return;
2326         }
2327         if (tevent_req_error(req, err)) {
2328                 return;
2329         }
2330
2331         if (!state->local) {
2332                 tevent_req_done(req);
2333                 return;
2334         }
2335
2336         lrbsda = talloc_get_type_abort(state->local->private_data,
2337                                        struct tsocket_address_bsd);
2338
2339         ret = getsockname(state->fd, &lrbsda->u.sa, &lrbsda->sa_socklen);
2340         if (ret == -1) {
2341                 tevent_req_error(req, errno);
2342                 return;
2343         }
2344
2345         tevent_req_done(req);
2346 }
2347
2348 static int tstream_bsd_connect_recv(struct tevent_req *req,
2349                                     int *perrno,
2350                                     TALLOC_CTX *mem_ctx,
2351                                     struct tstream_context **stream,
2352                                     struct tsocket_address **local,
2353                                     const char *location)
2354 {
2355         struct tstream_bsd_connect_state *state = tevent_req_data(req,
2356                                         struct tstream_bsd_connect_state);
2357         int ret;
2358
2359         ret = tsocket_simple_int_recv(req, perrno);
2360         if (ret == 0) {
2361                 ret = _tstream_bsd_existing_socket(mem_ctx,
2362                                                    state->fd,
2363                                                    stream,
2364                                                    location);
2365                 if (ret == -1) {
2366                         *perrno = errno;
2367                         goto done;
2368                 }
2369                 TALLOC_FREE(state->fde);
2370                 state->fd = -1;
2371
2372                 if (local) {
2373                         *local = talloc_move(mem_ctx, &state->local);
2374                 }
2375         }
2376
2377 done:
2378         tevent_req_received(req);
2379         return ret;
2380 }
2381
2382 struct tevent_req * tstream_inet_tcp_connect_send(TALLOC_CTX *mem_ctx,
2383                                         struct tevent_context *ev,
2384                                         const struct tsocket_address *local,
2385                                         const struct tsocket_address *remote)
2386 {
2387         struct tsocket_address_bsd *lbsda =
2388                 talloc_get_type_abort(local->private_data,
2389                 struct tsocket_address_bsd);
2390         struct tevent_req *req;
2391         int sys_errno = 0;
2392
2393         switch (lbsda->u.sa.sa_family) {
2394         case AF_INET:
2395                 break;
2396 #ifdef HAVE_IPV6
2397         case AF_INET6:
2398                 break;
2399 #endif
2400         default:
2401                 sys_errno = EINVAL;
2402                 break;
2403         }
2404
2405         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2406
2407         return req;
2408 }
2409
2410 int _tstream_inet_tcp_connect_recv(struct tevent_req *req,
2411                                    int *perrno,
2412                                    TALLOC_CTX *mem_ctx,
2413                                    struct tstream_context **stream,
2414                                    struct tsocket_address **local,
2415                                    const char *location)
2416 {
2417         return tstream_bsd_connect_recv(req, perrno,
2418                                         mem_ctx, stream, local,
2419                                         location);
2420 }
2421
2422 struct tevent_req * tstream_unix_connect_send(TALLOC_CTX *mem_ctx,
2423                                         struct tevent_context *ev,
2424                                         const struct tsocket_address *local,
2425                                         const struct tsocket_address *remote)
2426 {
2427         struct tsocket_address_bsd *lbsda =
2428                 talloc_get_type_abort(local->private_data,
2429                 struct tsocket_address_bsd);
2430         struct tevent_req *req;
2431         int sys_errno = 0;
2432
2433         switch (lbsda->u.sa.sa_family) {
2434         case AF_UNIX:
2435                 break;
2436         default:
2437                 sys_errno = EINVAL;
2438                 break;
2439         }
2440
2441         req = tstream_bsd_connect_send(mem_ctx, ev, sys_errno, local, remote);
2442
2443         return req;
2444 }
2445
2446 int _tstream_unix_connect_recv(struct tevent_req *req,
2447                                       int *perrno,
2448                                       TALLOC_CTX *mem_ctx,
2449                                       struct tstream_context **stream,
2450                                       const char *location)
2451 {
2452         return tstream_bsd_connect_recv(req, perrno,
2453                                         mem_ctx, stream, NULL,
2454                                         location);
2455 }
2456
2457 int _tstream_unix_socketpair(TALLOC_CTX *mem_ctx1,
2458                              struct tstream_context **_stream1,
2459                              TALLOC_CTX *mem_ctx2,
2460                              struct tstream_context **_stream2,
2461                              const char *location)
2462 {
2463         int ret;
2464         int fds[2];
2465         int fd1;
2466         int fd2;
2467         struct tstream_context *stream1 = NULL;
2468         struct tstream_context *stream2 = NULL;
2469
2470         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
2471         if (ret == -1) {
2472                 return -1;
2473         }
2474         fd1 = fds[0];
2475         fd2 = fds[1];
2476
2477         fd1 = tsocket_bsd_common_prepare_fd(fd1, true);
2478         if (fd1 == -1) {
2479                 int sys_errno = errno;
2480                 close(fd2);
2481                 errno = sys_errno;
2482                 return -1;
2483         }
2484
2485         fd2 = tsocket_bsd_common_prepare_fd(fd2, true);
2486         if (fd2 == -1) {
2487                 int sys_errno = errno;
2488                 close(fd1);
2489                 errno = sys_errno;
2490                 return -1;
2491         }
2492
2493         ret = _tstream_bsd_existing_socket(mem_ctx1,
2494                                            fd1,
2495                                            &stream1,
2496                                            location);
2497         if (ret == -1) {
2498                 int sys_errno = errno;
2499                 close(fd1);
2500                 close(fd2);
2501                 errno = sys_errno;
2502                 return -1;
2503         }
2504
2505         ret = _tstream_bsd_existing_socket(mem_ctx2,
2506                                            fd2,
2507                                            &stream2,
2508                                            location);
2509         if (ret == -1) {
2510                 int sys_errno = errno;
2511                 talloc_free(stream1);
2512                 close(fd2);
2513                 errno = sys_errno;
2514                 return -1;
2515         }
2516
2517         *_stream1 = stream1;
2518         *_stream2 = stream2;
2519         return 0;
2520 }
2521