server/sock.c

   1 /*
   2  * Server-side socket management
   3  *
   4  * Copyright (C) 1999 Marcus Meissner, Ove Kåven
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * FIXME: we use read|write access in all cases. Shouldn't we depend that
  21  * on the access of the current handle?
  22  */
  23
  24 #include "config.h"
  25
  26 #include <assert.h>
  27 #include <fcntl.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #ifdef HAVE_SYS_ERRNO_H
  34 # include <sys/errno.h>
  35 #endif
  36 #include <sys/time.h>
  37 #include <sys/types.h>
  38 #ifdef HAVE_SYS_SOCKET_H
  39 # include <sys/socket.h>
  40 #endif
  41 #ifdef HAVE_SYS_IOCTL_H
  42 #include <sys/ioctl.h>
  43 #endif
  44 #ifdef HAVE_SYS_FILIO_H
  45 # include <sys/filio.h>
  46 #endif
  47 #include <time.h>
  48 #include <unistd.h>
  49
  50 #include "windef.h"
  51 #include "winbase.h"
  52
  53 #include "process.h"
  54 #include "file.h"
  55 #include "handle.h"
  56 #include "thread.h"
  57 #include "request.h"
  58 #include "user.h"
  59
  60 /* To avoid conflicts with the Unix socket headers. Plus we only need a few
  61  * macros anyway.
  62  */
  63 #define USE_WS_PREFIX
  64 #include "winsock2.h"
  65
  66 struct sock
  67 {
  68     struct object       obj;         /* object header */
  69     struct fd          *fd;          /* socket file descriptor */
  70     unsigned int        state;       /* status bits */
  71     unsigned int        mask;        /* event mask */
  72     unsigned int        hmask;       /* held (blocked) events */
  73     unsigned int        pmask;       /* pending events */
  74     unsigned int        flags;       /* socket flags */
  75     int                 polling;     /* is socket being polled? */
  76     unsigned short      type;        /* socket type */
  77     unsigned short      family;      /* socket family */
  78     struct event       *event;       /* event object */
  79     user_handle_t       window;      /* window to send the message to */
  80     unsigned int        message;     /* message to send */
  81     obj_handle_t        wparam;      /* message wparam (socket handle) */
  82     int                 errors[FD_MAX_EVENTS]; /* event errors */
  83     struct sock        *deferred;    /* socket that waits for a deferred accept */
  84     struct list         read_q;      /* queue for asynchronous reads */
  85     struct list         write_q;     /* queue for asynchronous writes */
  86 };
  87
  88 static void sock_dump( struct object *obj, int verbose );
  89 static int sock_signaled( struct object *obj, struct thread *thread );
  90 static struct fd *sock_get_fd( struct object *obj );
  91 static void sock_destroy( struct object *obj );
  92
  93 static int sock_get_poll_events( struct fd *fd );
  94 static void sock_poll_event( struct fd *fd, int event );
  95 static int sock_get_info( struct fd *fd );
  96 static void sock_queue_async( struct fd *fd, void *apc, void *user, void *iosb, int type, int count );
  97 static void sock_cancel_async( struct fd *fd );
  98
  99 static int sock_get_error( int err );
 100 static void sock_set_error(void);
 101
 102 static const struct object_ops sock_ops =
 103 {
 104     sizeof(struct sock),          /* size */
 105     sock_dump,                    /* dump */
 106     add_queue,                    /* add_queue */
 107     remove_queue,                 /* remove_queue */
 108     sock_signaled,                /* signaled */
 109     no_satisfied,                 /* satisfied */
 110     sock_get_fd,                  /* get_fd */
 111     sock_destroy                  /* destroy */
 112 };
 113
 114 static const struct fd_ops sock_fd_ops =
 115 {
 116     sock_get_poll_events,         /* get_poll_events */
 117     sock_poll_event,              /* poll_event */
 118     no_flush,                     /* flush */
 119     sock_get_info,                /* get_file_info */
 120     sock_queue_async,             /* queue_async */
 121     sock_cancel_async             /* cancel_async */
 122 };
 123
 124
 125 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 126  * we post messages if there are multiple events.  Used to send
 127  * messages.  The problem is if there is both a FD_CONNECT event and,
 128  * say, an FD_READ event available on the same socket, we want to
 129  * notify the app of the connect event first.  Otherwise it may
 130  * discard the read event because it thinks it hasn't connected yet.
 131  */
 132 static const int event_bitorder[FD_MAX_EVENTS] =
 133 {
 134     FD_CONNECT_BIT,
 135     FD_ACCEPT_BIT,
 136     FD_OOB_BIT,
 137     FD_WRITE_BIT,
 138     FD_READ_BIT,
 139     FD_CLOSE_BIT,
 140     6, 7, 8, 9  /* leftovers */
 141 };
 142
 143 /* Flags that make sense only for SOCK_STREAM sockets */
 144 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 145
 146 typedef enum {
 147     SOCK_SHUTDOWN_ERROR = -1,
 148     SOCK_SHUTDOWN_EOF = 0,
 149     SOCK_SHUTDOWN_POLLHUP = 1
 150 } sock_shutdown_t;
 151
 152 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 153
 154 static sock_shutdown_t sock_check_pollhup(void)
 155 {
 156     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 157     int fd[2], n;
 158     struct pollfd pfd;
 159     char dummy;
 160
 161     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 162     if ( shutdown( fd[0], 1 ) ) goto out;
 163
 164     pfd.fd = fd[1];
 165     pfd.events = POLLIN;
 166     pfd.revents = 0;
 167
 168     n = poll( &pfd, 1, 0 );
 169     if ( n != 1 ) goto out; /* error or timeout */
 170     if ( pfd.revents & POLLHUP )
 171         ret = SOCK_SHUTDOWN_POLLHUP;
 172     else if ( pfd.revents & POLLIN &&
 173               read( fd[1], &dummy, 1 ) == 0 )
 174         ret = SOCK_SHUTDOWN_EOF;
 175
 176 out:
 177     close( fd[0] );
 178     close( fd[1] );
 179     return ret;
 180 }
 181
 182 void sock_init(void)
 183 {
 184     sock_shutdown_type = sock_check_pollhup();
 185
 186     switch ( sock_shutdown_type )
 187     {
 188     case SOCK_SHUTDOWN_EOF:
 189         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 190         break;
 191     case SOCK_SHUTDOWN_POLLHUP:
 192         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 193         break;
 194     default:
 195         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 196         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 197     }
 198 }
 199
 200 static int sock_reselect( struct sock *sock )
 201 {
 202     int ev = sock_get_poll_events( sock->fd );
 203
 204     if (debug_level)
 205         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 206
 207     if (!sock->polling)  /* FIXME: should find a better way to do this */
 208     {
 209         /* previously unconnected socket, is this reselect supposed to connect it? */
 210         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 211         /* ok, it is, attach it to the wineserver's main poll loop */
 212         sock->polling = 1;
 213     }
 214     /* update condition mask */
 215     set_fd_events( sock->fd, ev );
 216     return ev;
 217 }
 218
 219 /* After POLLHUP is received, the socket will no longer be in the main select loop.
 220    This function is used to signal pending events nevertheless */
 221 static void sock_try_event( struct sock *sock, int event )
 222 {
 223     event = check_fd_events( sock->fd, event );
 224     if (event)
 225     {
 226         if ( debug_level ) fprintf( stderr, "sock_try_event: %x\n", event );
 227         sock_poll_event( sock->fd, event );
 228     }
 229 }
 230
 231 /* wake anybody waiting on the socket event or send the associated message */
 232 static void sock_wake_up( struct sock *sock, int pollev )
 233 {
 234     unsigned int events = sock->pmask & sock->mask;
 235     int i;
 236     int async_active = 0;
 237
 238     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 239     {
 240         if ( pollev & (POLLIN|POLLPRI) && !list_empty( &sock->read_q ))
 241         {
 242             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 243             async_terminate_head( &sock->read_q, STATUS_ALERTED );
 244             async_active = 1;
 245         }
 246         if ( pollev & POLLOUT && !list_empty( &sock->write_q ))
 247         {
 248             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 249             async_terminate_head( &sock->write_q, STATUS_ALERTED );
 250             async_active = 1;
 251         }
 252     }
 253
 254     /* Do not signal events if there are still pending asynchronous IO requests */
 255     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 256     if ( !events || async_active ) return;
 257
 258     if (sock->event)
 259     {
 260         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 261         set_event( sock->event );
 262     }
 263     if (sock->window)
 264     {
 265         if (debug_level) fprintf(stderr, "signalling events %x win %p\n", events, sock->window );
 266         for (i = 0; i < FD_MAX_EVENTS; i++)
 267         {
 268             int event = event_bitorder[i];
 269             if (sock->pmask & (1 << event))
 270             {
 271                 unsigned int lparam = (1 << event) | (sock->errors[event] << 16);
 272                 post_message( sock->window, sock->message, (unsigned int)sock->wparam, lparam );
 273             }
 274         }
 275         sock->pmask = 0;
 276         sock_reselect( sock );
 277     }
 278 }
 279
 280 inline static int sock_error( struct fd *fd )
 281 {
 282     unsigned int optval = 0, optlen;
 283
 284     optlen = sizeof(optval);
 285     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 286     return optval ? sock_get_error(optval) : 0;
 287 }
 288
 289 static void sock_poll_event( struct fd *fd, int event )
 290 {
 291     struct sock *sock = get_fd_user( fd );
 292     int hangup_seen = 0;
 293
 294     assert( sock->obj.ops == &sock_ops );
 295     if (debug_level)
 296         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 297     if (sock->state & FD_CONNECT)
 298     {
 299         /* connecting */
 300         if (event & POLLOUT)
 301         {
 302             /* we got connected */
 303             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 304             sock->state &= ~FD_CONNECT;
 305             sock->pmask |= FD_CONNECT;
 306             sock->errors[FD_CONNECT_BIT] = 0;
 307             if (debug_level)
 308                 fprintf(stderr, "socket %p connection success\n", sock);
 309         }
 310         else if (event & (POLLERR|POLLHUP))
 311         {
 312             /* we didn't get connected? */
 313             sock->state &= ~FD_CONNECT;
 314             sock->pmask |= FD_CONNECT;
 315             sock->errors[FD_CONNECT_BIT] = sock_error( fd );
 316             if (debug_level)
 317                 fprintf(stderr, "socket %p connection failure\n", sock);
 318         }
 319     }
 320     else if (sock->state & FD_WINE_LISTENING)
 321     {
 322         /* listening */
 323         if (event & POLLIN)
 324         {
 325             /* incoming connection */
 326             sock->pmask |= FD_ACCEPT;
 327             sock->errors[FD_ACCEPT_BIT] = 0;
 328             sock->hmask |= FD_ACCEPT;
 329         }
 330         else if (event & (POLLERR|POLLHUP))
 331         {
 332             /* failed incoming connection? */
 333             sock->pmask |= FD_ACCEPT;
 334             sock->errors[FD_ACCEPT_BIT] = sock_error( fd );
 335             sock->hmask |= FD_ACCEPT;
 336         }
 337     }
 338     else
 339     {
 340         /* normal data flow */
 341         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 342         {
 343             char dummy;
 344             int nr;
 345
 346             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 347              * has been closed, so we need to check for it explicitly here */
 348             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 349             if ( nr > 0 )
 350             {
 351                 /* incoming data */
 352                 sock->pmask |= FD_READ;
 353                 sock->hmask |= (FD_READ|FD_CLOSE);
 354                 sock->errors[FD_READ_BIT] = 0;
 355                 if (debug_level)
 356                     fprintf(stderr, "socket %p is readable\n", sock );
 357             }
 358             else if ( nr == 0 )
 359                 hangup_seen = 1;
 360             else
 361             {
 362                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 363                    call and the invocation of this routine */
 364                 if ( errno == EAGAIN )
 365                     event &= ~POLLIN;
 366                 else
 367                 {
 368                     if ( debug_level )
 369                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 370                     event = POLLERR;
 371                 }
 372             }
 373
 374         }
 375         else if ( sock_shutdown_type == SOCK_SHUTDOWN_POLLHUP && (event & POLLHUP) )
 376         {
 377             hangup_seen = 1;
 378         }
 379         else if ( event & POLLIN ) /* POLLIN for non-stream socket */
 380         {
 381             sock->pmask |= FD_READ;
 382             sock->hmask |= (FD_READ|FD_CLOSE);
 383             sock->errors[FD_READ_BIT] = 0;
 384             if (debug_level)
 385                 fprintf(stderr, "socket %p is readable\n", sock );
 386
 387         }
 388
 389         if (event & POLLOUT)
 390         {
 391             sock->pmask |= FD_WRITE;
 392             sock->hmask |= FD_WRITE;
 393             sock->errors[FD_WRITE_BIT] = 0;
 394             if (debug_level)
 395                 fprintf(stderr, "socket %p is writable\n", sock);
 396         }
 397         if (event & POLLPRI)
 398         {
 399             sock->pmask |= FD_OOB;
 400             sock->hmask |= FD_OOB;
 401             sock->errors[FD_OOB_BIT] = 0;
 402             if (debug_level)
 403                 fprintf(stderr, "socket %p got OOB data\n", sock);
 404         }
 405         /* According to WS2 specs, FD_CLOSE is only delivered when there is
 406            no more data to be read (i.e. hangup_seen = 1) */
 407         else if ( hangup_seen && (sock->state & (FD_READ|FD_WRITE) ))
 408         {
 409             sock->errors[FD_CLOSE_BIT] = sock_error( fd );
 410             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 411                 sock->state &= ~FD_WRITE;
 412             sock->pmask |= FD_CLOSE;
 413             sock->hmask |= FD_CLOSE;
 414             if (debug_level)
 415                 fprintf(stderr, "socket %p aborted by error %d, event: %x - removing from select loop\n",
 416                         sock, sock->errors[FD_CLOSE_BIT], event);
 417         }
 418     }
 419
 420     if ( sock->pmask & FD_CLOSE || event & (POLLERR|POLLHUP) )
 421     {
 422         if ( debug_level )
 423             fprintf( stderr, "removing socket %p from select loop\n", sock );
 424         set_fd_events( sock->fd, -1 );
 425     }
 426     else
 427         sock_reselect( sock );
 428
 429     /* wake up anyone waiting for whatever just happened */
 430     if ( sock->pmask & sock->mask || sock->flags & WSA_FLAG_OVERLAPPED ) sock_wake_up( sock, event );
 431
 432     /* if anyone is stupid enough to wait on the socket object itself,
 433      * maybe we should wake them up too, just in case? */
 434     wake_up( &sock->obj, 0 );
 435 }
 436
 437 static void sock_dump( struct object *obj, int verbose )
 438 {
 439     struct sock *sock = (struct sock *)obj;
 440     assert( obj->ops == &sock_ops );
 441     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 442             sock->fd, sock->state,
 443             sock->mask, sock->pmask, sock->hmask );
 444 }
 445
 446 static int sock_signaled( struct object *obj, struct thread *thread )
 447 {
 448     struct sock *sock = (struct sock *)obj;
 449     assert( obj->ops == &sock_ops );
 450
 451     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 452 }
 453
 454 static int sock_get_poll_events( struct fd *fd )
 455 {
 456     struct sock *sock = get_fd_user( fd );
 457     unsigned int mask = sock->mask & sock->state & ~sock->hmask;
 458     int ev = 0;
 459
 460     assert( sock->obj.ops == &sock_ops );
 461
 462     if (sock->state & FD_CONNECT)
 463         /* connecting, wait for writable */
 464         return POLLOUT;
 465     if (sock->state & FD_WINE_LISTENING)
 466         /* listening, wait for readable */
 467         return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
 468
 469     if (mask & (FD_READ) || (sock->flags & WSA_FLAG_OVERLAPPED && !list_empty( &sock->read_q )))
 470         ev |= POLLIN | POLLPRI;
 471     if (mask & FD_WRITE || (sock->flags & WSA_FLAG_OVERLAPPED && !list_empty( &sock->write_q )))
 472         ev |= POLLOUT;
 473     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 474     if ( sock->type == SOCK_STREAM && ( sock->mask & ~sock->hmask & FD_CLOSE) )
 475         ev |= POLLIN;
 476
 477     return ev;
 478 }
 479
 480 static int sock_get_info( struct fd *fd )
 481 {
 482     int flags = FD_FLAG_AVAILABLE;
 483     struct sock *sock = get_fd_user( fd );
 484     assert( sock->obj.ops == &sock_ops );
 485
 486     if (sock->flags & WSA_FLAG_OVERLAPPED) flags |= FD_FLAG_OVERLAPPED;
 487     if ( sock->type != SOCK_STREAM || sock->state & FD_WINE_CONNECTED )
 488     {
 489         if ( !(sock->state & FD_READ  ) ) flags |= FD_FLAG_RECV_SHUTDOWN;
 490         if ( !(sock->state & FD_WRITE ) ) flags |= FD_FLAG_SEND_SHUTDOWN;
 491     }
 492     return flags;
 493 }
 494
 495 static void sock_queue_async( struct fd *fd, void *apc, void *user, void *iosb,
 496                               int type, int count )
 497 {
 498     struct sock *sock = get_fd_user( fd );
 499     struct list *queue;
 500     int pollev;
 501
 502     assert( sock->obj.ops == &sock_ops );
 503
 504     if ( !(sock->flags & WSA_FLAG_OVERLAPPED) )
 505     {
 506         set_error( STATUS_INVALID_HANDLE );
 507         return;
 508     }
 509
 510     switch (type)
 511     {
 512     case ASYNC_TYPE_READ:
 513         queue = &sock->read_q;
 514         sock->hmask &= ~FD_CLOSE;
 515         break;
 516     case ASYNC_TYPE_WRITE:
 517         queue = &sock->write_q;
 518         break;
 519     default:
 520         set_error( STATUS_INVALID_PARAMETER );
 521         return;
 522     }
 523
 524     if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 525          ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 526     {
 527         set_error( STATUS_PIPE_DISCONNECTED );
 528     }
 529     else
 530     {
 531         if (!create_async( current, 0, queue, apc, user, iosb ))
 532             return;
 533     }
 534
 535     pollev = sock_reselect( sock );
 536     if ( pollev ) sock_try_event( sock, pollev );
 537 }
 538
 539 static void sock_cancel_async( struct fd *fd )
 540 {
 541     struct sock *sock = get_fd_user( fd );
 542     assert( sock->obj.ops == &sock_ops );
 543
 544     async_terminate_queue( &sock->read_q, STATUS_CANCELLED );
 545     async_terminate_queue( &sock->write_q, STATUS_CANCELLED );
 546 }
 547
 548 static struct fd *sock_get_fd( struct object *obj )
 549 {
 550     struct sock *sock = (struct sock *)obj;
 551     return (struct fd *)grab_object( sock->fd );
 552 }
 553
 554 static void sock_destroy( struct object *obj )
 555 {
 556     struct sock *sock = (struct sock *)obj;
 557     assert( obj->ops == &sock_ops );
 558
 559     /* FIXME: special socket shutdown stuff? */
 560
 561     if ( sock->deferred )
 562         release_object( sock->deferred );
 563
 564     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 565     {
 566         async_terminate_queue( &sock->read_q, STATUS_CANCELLED );
 567         async_terminate_queue( &sock->write_q, STATUS_CANCELLED );
 568     }
 569     if (sock->event) release_object( sock->event );
 570     if (sock->fd) release_object( sock->fd );
 571 }
 572
 573 /* create a new and unconnected socket */
 574 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 575 {
 576     struct sock *sock;
 577     int sockfd;
 578
 579     sockfd = socket( family, type, protocol );
 580     if (debug_level)
 581         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 582     if (sockfd == -1)
 583     {
 584         sock_set_error();
 585         return NULL;
 586     }
 587     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 588     if (!(sock = alloc_object( &sock_ops )))
 589     {
 590         close( sockfd );
 591         return NULL;
 592     }
 593     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 594     sock->mask    = 0;
 595     sock->hmask   = 0;
 596     sock->pmask   = 0;
 597     sock->polling = 0;
 598     sock->flags   = flags;
 599     sock->type    = type;
 600     sock->family  = family;
 601     sock->event   = NULL;
 602     sock->window  = 0;
 603     sock->message = 0;
 604     sock->wparam  = 0;
 605     sock->deferred = NULL;
 606     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj )))
 607     {
 608         release_object( sock );
 609         return NULL;
 610     }
 611     list_init( &sock->read_q );
 612     list_init( &sock->write_q );
 613     sock_reselect( sock );
 614     clear_error();
 615     return &sock->obj;
 616 }
 617
 618 /* accept a socket (creates a new fd) */
 619 static struct sock *accept_socket( obj_handle_t handle )
 620 {
 621     struct sock *acceptsock;
 622     struct sock *sock;
 623     int acceptfd;
 624     struct sockaddr     saddr;
 625     int                 slen;
 626
 627     sock=(struct sock*)get_handle_obj(current->process,handle,
 628                                       GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 629     if (!sock)
 630         return NULL;
 631
 632     if ( sock->deferred )
 633     {
 634         acceptsock = sock->deferred;
 635         sock->deferred = NULL;
 636     }
 637     else
 638     {
 639
 640         /* Try to accept(2). We can't be safe that this an already connected socket
 641          * or that accept() is allowed on it. In those cases we will get -1/errno
 642          * return.
 643          */
 644         slen = sizeof(saddr);
 645         acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 646         if (acceptfd==-1)
 647         {
 648             sock_set_error();
 649             release_object( sock );
 650             return NULL;
 651         }
 652         if (!(acceptsock = alloc_object( &sock_ops )))
 653         {
 654             close( acceptfd );
 655             release_object( sock );
 656             return NULL;
 657         }
 658
 659         /* newly created socket gets the same properties of the listening socket */
 660         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 661         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 662         if (sock->state & FD_WINE_NONBLOCKING)
 663             acceptsock->state |= FD_WINE_NONBLOCKING;
 664         acceptsock->mask    = sock->mask;
 665         acceptsock->hmask   = 0;
 666         acceptsock->pmask   = 0;
 667         acceptsock->polling = 0;
 668         acceptsock->type    = sock->type;
 669         acceptsock->family  = sock->family;
 670         acceptsock->event   = NULL;
 671         acceptsock->window  = sock->window;
 672         acceptsock->message = sock->message;
 673         acceptsock->wparam  = 0;
 674         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 675         acceptsock->flags = sock->flags;
 676         acceptsock->deferred = 0;
 677         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj )))
 678         {
 679             release_object( acceptsock );
 680             release_object( sock );
 681             return NULL;
 682         }
 683         list_init( &acceptsock->read_q );
 684         list_init( &acceptsock->write_q );
 685     }
 686     clear_error();
 687     sock->pmask &= ~FD_ACCEPT;
 688     sock->hmask &= ~FD_ACCEPT;
 689     sock_reselect( sock );
 690     release_object( sock );
 691     return acceptsock;
 692 }
 693
 694 /* set the last error depending on errno */
 695 static int sock_get_error( int err )
 696 {
 697     switch (err)
 698     {
 699         case EINTR:             return WSAEINTR;
 700         case EBADF:             return WSAEBADF;
 701         case EPERM:
 702         case EACCES:            return WSAEACCES;
 703         case EFAULT:            return WSAEFAULT;
 704         case EINVAL:            return WSAEINVAL;
 705         case EMFILE:            return WSAEMFILE;
 706         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 707         case EINPROGRESS:       return WSAEINPROGRESS;
 708         case EALREADY:          return WSAEALREADY;
 709         case ENOTSOCK:          return WSAENOTSOCK;
 710         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 711         case EMSGSIZE:          return WSAEMSGSIZE;
 712         case EPROTOTYPE:        return WSAEPROTOTYPE;
 713         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 714         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 715         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 716         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 717         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 718         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 719         case EADDRINUSE:        return WSAEADDRINUSE;
 720         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 721         case ENETDOWN:          return WSAENETDOWN;
 722         case ENETUNREACH:       return WSAENETUNREACH;
 723         case ENETRESET:         return WSAENETRESET;
 724         case ECONNABORTED:      return WSAECONNABORTED;
 725         case EPIPE:
 726         case ECONNRESET:        return WSAECONNRESET;
 727         case ENOBUFS:           return WSAENOBUFS;
 728         case EISCONN:           return WSAEISCONN;
 729         case ENOTCONN:          return WSAENOTCONN;
 730         case ESHUTDOWN:         return WSAESHUTDOWN;
 731         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 732         case ETIMEDOUT:         return WSAETIMEDOUT;
 733         case ECONNREFUSED:      return WSAECONNREFUSED;
 734         case ELOOP:             return WSAELOOP;
 735         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 736         case EHOSTDOWN:         return WSAEHOSTDOWN;
 737         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 738         case ENOTEMPTY:         return WSAENOTEMPTY;
 739 #ifdef EPROCLIM
 740         case EPROCLIM:          return WSAEPROCLIM;
 741 #endif
 742 #ifdef EUSERS
 743         case EUSERS:            return WSAEUSERS;
 744 #endif
 745 #ifdef EDQUOT
 746         case EDQUOT:            return WSAEDQUOT;
 747 #endif
 748 #ifdef ESTALE
 749         case ESTALE:            return WSAESTALE;
 750 #endif
 751 #ifdef EREMOTE
 752         case EREMOTE:           return WSAEREMOTE;
 753 #endif
 754     default: errno=err; perror("sock_set_error"); return WSAEFAULT;
 755     }
 756 }
 757
 758 /* set the last error depending on errno */
 759 static void sock_set_error(void)
 760 {
 761     set_error( sock_get_error( errno ) );
 762 }
 763
 764 /* create a socket */
 765 DECL_HANDLER(create_socket)
 766 {
 767     struct object *obj;
 768
 769     reply->handle = 0;
 770     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 771     {
 772         reply->handle = alloc_handle( current->process, obj, req->access, req->inherit );
 773         release_object( obj );
 774     }
 775 }
 776
 777 /* accept a socket */
 778 DECL_HANDLER(accept_socket)
 779 {
 780     struct sock *sock;
 781
 782     reply->handle = 0;
 783     if ((sock = accept_socket( req->lhandle )) != NULL)
 784     {
 785         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->inherit );
 786         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 787         sock_reselect( sock );
 788         release_object( &sock->obj );
 789     }
 790 }
 791
 792 /* set socket event parameters */
 793 DECL_HANDLER(set_socket_event)
 794 {
 795     struct sock *sock;
 796     struct event *old_event;
 797     int pollev;
 798
 799     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 800                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 801         return;
 802     old_event = sock->event;
 803     sock->mask    = req->mask;
 804     sock->event   = NULL;
 805     sock->window  = req->window;
 806     sock->message = req->msg;
 807     sock->wparam  = req->handle;  /* wparam is the socket handle */
 808     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 809
 810     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 811
 812     pollev = sock_reselect( sock );
 813     if ( pollev ) sock_try_event( sock, pollev );
 814
 815     if (sock->mask)
 816         sock->state |= FD_WINE_NONBLOCKING;
 817
 818     /* if a network event is pending, signal the event object
 819        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 820        before a WSAEventSelect() was done on it.
 821        (when dealing with Asynchronous socket)  */
 822     if (sock->pmask & sock->mask) sock_wake_up( sock, pollev );
 823
 824     if (old_event) release_object( old_event ); /* we're through with it */
 825     release_object( &sock->obj );
 826 }
 827
 828 /* get socket event parameters */
 829 DECL_HANDLER(get_socket_event)
 830 {
 831     struct sock *sock;
 832
 833     sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 834     if (!sock)
 835     {
 836         reply->mask  = 0;
 837         reply->pmask = 0;
 838         reply->state = 0;
 839         set_error( WSAENOTSOCK );
 840         return;
 841     }
 842     reply->mask  = sock->mask;
 843     reply->pmask = sock->pmask;
 844     reply->state = sock->state;
 845     set_reply_data( sock->errors, min( get_reply_max_size(), sizeof(sock->errors) ));
 846
 847     if (req->service)
 848     {
 849         if (req->c_event)
 850         {
 851             struct event *cevent = get_event_obj( current->process, req->c_event,
 852                                                   EVENT_MODIFY_STATE );
 853             if (cevent)
 854             {
 855                 reset_event( cevent );
 856                 release_object( cevent );
 857             }
 858         }
 859         sock->pmask = 0;
 860         sock_reselect( sock );
 861     }
 862     release_object( &sock->obj );
 863 }
 864
 865 /* re-enable pending socket events */
 866 DECL_HANDLER(enable_socket_event)
 867 {
 868     struct sock *sock;
 869     int pollev;
 870
 871     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 872                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 873         return;
 874
 875     sock->pmask &= ~req->mask; /* is this safe? */
 876     sock->hmask &= ~req->mask;
 877     if ( req->mask & FD_READ )
 878         sock->hmask &= ~FD_CLOSE;
 879     sock->state |= req->sstate;
 880     sock->state &= ~req->cstate;
 881     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 882
 883     pollev = sock_reselect( sock );
 884     if ( pollev ) sock_try_event( sock, pollev );
 885
 886     release_object( &sock->obj );
 887 }
 888
 889 DECL_HANDLER(set_socket_deferred)
 890 {
 891     struct sock *sock, *acceptsock;
 892
 893     sock=(struct sock*)get_handle_obj( current->process,req->handle,
 894                                        GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 895     if ( !sock )
 896     {
 897         set_error( WSAENOTSOCK );
 898         return;
 899     }
 900     acceptsock = (struct sock*)get_handle_obj( current->process,req->deferred,
 901                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 902     if ( !acceptsock )
 903     {
 904         release_object( sock );
 905         set_error( WSAENOTSOCK );
 906         return;
 907     }
 908     sock->deferred = acceptsock;
 909     release_object( sock );
 910 }