dlls/webservices/listener.c

   1 /*
   2  * Copyright 2017 Hans Leidekker for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20
  21 #include "windef.h"
  22 #include "winbase.h"
  23 #include "webservices.h"
  24
  25 #include "wine/debug.h"
  26 #include "wine/list.h"
  27 #include "wine/unicode.h"
  28 #include "webservices_private.h"
  29 #include "sock.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(webservices);
  32
  33 static BOOL winsock_loaded;
  34
  35 static BOOL WINAPI winsock_startup( INIT_ONCE *once, void *param, void **ctx )
  36 {
  37     int ret;
  38     WSADATA data;
  39     if (!(ret = WSAStartup( MAKEWORD(1,1), &data ))) winsock_loaded = TRUE;
  40     else ERR( "WSAStartup failed: %d\n", ret );
  41     return TRUE;
  42 }
  43
  44 void winsock_init(void)
  45 {
  46     static INIT_ONCE once = INIT_ONCE_STATIC_INIT;
  47     InitOnceExecuteOnce( &once, winsock_startup, NULL, NULL );
  48 }
  49
  50 static const struct prop_desc listener_props[] =
  51 {
  52     { sizeof(ULONG), FALSE },                               /* WS_LISTENER_PROPERTY_LISTEN_BACKLOG */
  53     { sizeof(WS_IP_VERSION), FALSE },                       /* WS_LISTENER_PROPERTY_IP_VERSION */
  54     { sizeof(WS_LISTENER_STATE), TRUE },                    /* WS_LISTENER_PROPERTY_STATE */
  55     { sizeof(WS_CALLBACK_MODEL), FALSE },                   /* WS_LISTENER_PROPERTY_ASYNC_CALLBACK_MODEL */
  56     { sizeof(WS_CHANNEL_TYPE), TRUE },                      /* WS_LISTENER_PROPERTY_CHANNEL_TYPE */
  57     { sizeof(WS_CHANNEL_BINDING), TRUE },                   /* WS_LISTENER_PROPERTY_CHANNEL_BINDING */
  58     { sizeof(ULONG), FALSE },                               /* WS_LISTENER_PROPERTY_CONNECT_TIMEOUT */
  59     { sizeof(BOOL), FALSE },                                /* WS_LISTENER_PROPERTY_IS_MULTICAST */
  60     { 0, FALSE },                                           /* WS_LISTENER_PROPERTY_MULTICAST_INTERFACES */
  61     { sizeof(BOOL), FALSE },                                /* WS_LISTENER_PROPERTY_MULTICAST_LOOPBACK */
  62     { sizeof(ULONG), FALSE },                               /* WS_LISTENER_PROPERTY_CLOSE_TIMEOUT */
  63     { sizeof(ULONG), FALSE },                               /* WS_LISTENER_PROPERTY_TO_HEADER_MATCHING_OPTIONS */
  64     { sizeof(ULONG), FALSE },                               /* WS_LISTENER_PROPERTY_TRANSPORT_URL_MATCHING_OPTIONS */
  65     { sizeof(WS_CUSTOM_LISTENER_CALLBACKS), FALSE },        /* WS_LISTENER_PROPERTY_CUSTOM_LISTENER_CALLBACKS */
  66     { 0, FALSE },                                           /* WS_LISTENER_PROPERTY_CUSTOM_LISTENER_PARAMETERS */
  67     { sizeof(void *), TRUE },                               /* WS_LISTENER_PROPERTY_CUSTOM_LISTENER_INSTANCE */
  68     { sizeof(WS_DISALLOWED_USER_AGENT_SUBSTRINGS), FALSE }  /* WS_LISTENER_PROPERTY_DISALLOWED_USER_AGENT */
  69 };
  70
  71 struct listener
  72 {
  73     ULONG                   magic;
  74     CRITICAL_SECTION        cs;
  75     WS_CHANNEL_TYPE         type;
  76     WS_CHANNEL_BINDING      binding;
  77     WS_LISTENER_STATE       state;
  78     HANDLE                  wait;
  79     HANDLE                  cancel;
  80     WS_CHANNEL             *channel;
  81     union
  82     {
  83         struct
  84         {
  85             SOCKET socket;
  86         } tcp;
  87         struct
  88         {
  89             SOCKET socket;
  90         } udp;
  91     } u;
  92     ULONG                   prop_count;
  93     struct prop             prop[sizeof(listener_props)/sizeof(listener_props[0])];
  94 };
  95
  96 #define LISTENER_MAGIC (('L' << 24) | ('I' << 16) | ('S' << 8) | 'T')
  97
  98 static struct listener *alloc_listener(void)
  99 {
 100     static const ULONG count = sizeof(listener_props)/sizeof(listener_props[0]);
 101     struct listener *ret;
 102     ULONG size = sizeof(*ret) + prop_size( listener_props, count );
 103
 104     if (!(ret = heap_alloc_zero( size ))) return NULL;
 105
 106     ret->magic = LISTENER_MAGIC;
 107     if (!(ret->wait = CreateEventW( NULL, FALSE, FALSE, NULL )))
 108     {
 109         heap_free( ret );
 110         return NULL;
 111     }
 112     if (!(ret->cancel = CreateEventW( NULL, FALSE, FALSE, NULL )))
 113     {
 114         CloseHandle( ret->wait );
 115         heap_free( ret );
 116         return NULL;
 117     }
 118     InitializeCriticalSection( &ret->cs );
 119     ret->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": listener.cs");
 120
 121     prop_init( listener_props, count, ret->prop, &ret[1] );
 122     ret->prop_count = count;
 123     return ret;
 124 }
 125
 126 static void reset_listener( struct listener *listener )
 127 {
 128     listener->state = WS_LISTENER_STATE_CREATED;
 129     SetEvent( listener->cancel );
 130     listener->channel = NULL;
 131
 132     switch (listener->binding)
 133     {
 134     case WS_TCP_CHANNEL_BINDING:
 135         closesocket( listener->u.tcp.socket );
 136         listener->u.tcp.socket = -1;
 137         break;
 138
 139     case WS_UDP_CHANNEL_BINDING:
 140         closesocket( listener->u.udp.socket );
 141         listener->u.udp.socket = -1;
 142         break;
 143
 144     default: break;
 145     }
 146 }
 147
 148 static void free_listener( struct listener *listener )
 149 {
 150     reset_listener( listener );
 151
 152     CloseHandle( listener->wait );
 153     CloseHandle( listener->cancel );
 154
 155     listener->cs.DebugInfo->Spare[0] = 0;
 156     DeleteCriticalSection( &listener->cs );
 157     heap_free( listener );
 158 }
 159
 160 static HRESULT create_listener( WS_CHANNEL_TYPE type, WS_CHANNEL_BINDING binding,
 161                                 const WS_LISTENER_PROPERTY *properties, ULONG count, struct listener **ret )
 162 {
 163     struct listener *listener;
 164     HRESULT hr;
 165     ULONG i;
 166
 167     if (!(listener = alloc_listener())) return E_OUTOFMEMORY;
 168
 169     for (i = 0; i < count; i++)
 170     {
 171         hr = prop_set( listener->prop, listener->prop_count, properties[i].id, properties[i].value,
 172                        properties[i].valueSize );
 173         if (hr != S_OK)
 174         {
 175             free_listener( listener );
 176             return hr;
 177         }
 178     }
 179
 180     listener->type    = type;
 181     listener->binding = binding;
 182
 183     switch (listener->binding)
 184     {
 185     case WS_TCP_CHANNEL_BINDING:
 186         listener->u.tcp.socket = -1;
 187         break;
 188
 189     case WS_UDP_CHANNEL_BINDING:
 190         listener->u.udp.socket = -1;
 191         break;
 192
 193     default: break;
 194     }
 195
 196     *ret = listener;
 197     return S_OK;
 198 }
 199
 200 /**************************************************************************
 201  *          WsCreateListener            [webservices.@]
 202  */
 203 HRESULT WINAPI WsCreateListener( WS_CHANNEL_TYPE type, WS_CHANNEL_BINDING binding,
 204                                  const WS_LISTENER_PROPERTY *properties, ULONG count,
 205                                  const WS_SECURITY_DESCRIPTION *desc, WS_LISTENER **handle,
 206                                  WS_ERROR *error )
 207 {
 208     struct listener *listener;
 209     HRESULT hr;
 210
 211     TRACE( "%u %u %p %u %p %p %p\n", type, binding, properties, count, desc, handle, error );
 212     if (error) FIXME( "ignoring error parameter\n" );
 213     if (desc) FIXME( "ignoring security description\n" );
 214
 215     if (!handle) return E_INVALIDARG;
 216
 217     if (type != WS_CHANNEL_TYPE_DUPLEX_SESSION && type != WS_CHANNEL_TYPE_DUPLEX)
 218     {
 219         FIXME( "channel type %u not implemented\n", type );
 220         return E_NOTIMPL;
 221     }
 222     if (binding != WS_TCP_CHANNEL_BINDING && binding != WS_UDP_CHANNEL_BINDING)
 223     {
 224         FIXME( "channel binding %u not implemented\n", binding );
 225         return E_NOTIMPL;
 226     }
 227
 228     if ((hr = create_listener( type, binding, properties, count, &listener )) != S_OK) return hr;
 229
 230     *handle = (WS_LISTENER *)listener;
 231     return S_OK;
 232 }
 233
 234 /**************************************************************************
 235  *          WsFreeListener              [webservices.@]
 236  */
 237 void WINAPI WsFreeListener( WS_LISTENER *handle )
 238 {
 239     struct listener *listener = (struct listener *)handle;
 240
 241     TRACE( "%p\n", handle );
 242
 243     if (!listener) return;
 244
 245     EnterCriticalSection( &listener->cs );
 246
 247     if (listener->magic != LISTENER_MAGIC)
 248     {
 249         LeaveCriticalSection( &listener->cs );
 250         return;
 251     }
 252
 253     listener->magic = 0;
 254
 255     LeaveCriticalSection( &listener->cs );
 256     free_listener( listener );
 257 }
 258
 259 HRESULT resolve_hostname( const WCHAR *host, USHORT port, struct sockaddr *addr, int *addr_len, int flags )
 260 {
 261     static const WCHAR fmtW[] = {'%','u',0};
 262     WCHAR service[6];
 263     ADDRINFOW hints, *res, *info;
 264     HRESULT hr = WS_E_ADDRESS_NOT_AVAILABLE;
 265
 266     memset( &hints, 0, sizeof(hints) );
 267     hints.ai_flags  = flags;
 268     hints.ai_family = AF_INET;
 269
 270     *addr_len = 0;
 271     sprintfW( service, fmtW, port );
 272     if (GetAddrInfoW( host, service, &hints, &res )) return HRESULT_FROM_WIN32( WSAGetLastError() );
 273
 274     info = res;
 275     while (info && info->ai_family != AF_INET) info = info->ai_next;
 276     if (info)
 277     {
 278         memcpy( addr, info->ai_addr, info->ai_addrlen );
 279         *addr_len = info->ai_addrlen;
 280         hr = S_OK;
 281     }
 282
 283     FreeAddrInfoW( res );
 284     return hr;
 285 }
 286
 287 HRESULT parse_url( const WS_STRING *str, WS_URL_SCHEME_TYPE *scheme, WCHAR **host, USHORT *port )
 288 {
 289     WS_HEAP *heap;
 290     WS_NETTCP_URL *url;
 291     HRESULT hr;
 292
 293     if ((hr = WsCreateHeap( 1 << 8, 0, NULL, 0, &heap, NULL )) != S_OK) return hr;
 294     if ((hr = WsDecodeUrl( str, 0, heap, (WS_URL **)&url, NULL )) != S_OK)
 295     {
 296         WsFreeHeap( heap );
 297         return hr;
 298     }
 299
 300     if (url->host.length == 1 && (url->host.chars[0] == '+' || url->host.chars[0] == '*')) *host = NULL;
 301     else
 302     {
 303         if (!(*host = heap_alloc( (url->host.length + 1) * sizeof(WCHAR) )))
 304         {
 305             WsFreeHeap( heap );
 306             return E_OUTOFMEMORY;
 307         }
 308         memcpy( *host, url->host.chars, url->host.length * sizeof(WCHAR) );
 309         (*host)[url->host.length] = 0;
 310     }
 311     *scheme = url->url.scheme;
 312     *port = url->port;
 313
 314     WsFreeHeap( heap );
 315     return hr;
 316 }
 317
 318 static HRESULT open_listener_tcp( struct listener *listener, const WS_STRING *url )
 319 {
 320     struct sockaddr_storage storage;
 321     struct sockaddr *addr = (struct sockaddr *)&storage;
 322     int addr_len, on = 1;
 323     WS_URL_SCHEME_TYPE scheme;
 324     WCHAR *host;
 325     USHORT port;
 326     HRESULT hr;
 327
 328     if ((hr = parse_url( url, &scheme, &host, &port )) != S_OK) return hr;
 329     if (scheme != WS_URL_NETTCP_SCHEME_TYPE)
 330     {
 331         heap_free( host );
 332         return WS_E_INVALID_ENDPOINT_URL;
 333     }
 334
 335     winsock_init();
 336
 337     hr = resolve_hostname( host, port, addr, &addr_len, AI_PASSIVE );
 338     heap_free( host );
 339     if (hr != S_OK) return hr;
 340
 341     if ((listener->u.tcp.socket = socket( addr->sa_family, SOCK_STREAM, 0 )) == -1)
 342         return HRESULT_FROM_WIN32( WSAGetLastError() );
 343
 344     if (setsockopt( listener->u.tcp.socket, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on) ) < 0)
 345     {
 346         closesocket( listener->u.tcp.socket );
 347         listener->u.tcp.socket = -1;
 348         return HRESULT_FROM_WIN32( WSAGetLastError() );
 349     }
 350
 351     if (bind( listener->u.tcp.socket, addr, addr_len ) < 0)
 352     {
 353         closesocket( listener->u.tcp.socket );
 354         listener->u.tcp.socket = -1;
 355         return HRESULT_FROM_WIN32( WSAGetLastError() );
 356     }
 357
 358     if (listen( listener->u.tcp.socket, 0 ) < 0)
 359     {
 360         closesocket( listener->u.tcp.socket );
 361         listener->u.tcp.socket = -1;
 362         return HRESULT_FROM_WIN32( WSAGetLastError() );
 363     }
 364
 365     listener->state = WS_LISTENER_STATE_OPEN;
 366     return S_OK;
 367 }
 368
 369 static HRESULT open_listener_udp( struct listener *listener, const WS_STRING *url )
 370 {
 371     struct sockaddr_storage storage;
 372     struct sockaddr *addr = (struct sockaddr *)&storage;
 373     int addr_len;
 374     WS_URL_SCHEME_TYPE scheme;
 375     WCHAR *host;
 376     USHORT port;
 377     HRESULT hr;
 378
 379     if ((hr = parse_url( url, &scheme, &host, &port )) != S_OK) return hr;
 380     if (scheme != WS_URL_SOAPUDP_SCHEME_TYPE)
 381     {
 382         heap_free( host );
 383         return WS_E_INVALID_ENDPOINT_URL;
 384     }
 385
 386     winsock_init();
 387
 388     hr = resolve_hostname( host, port, addr, &addr_len, AI_PASSIVE );
 389     heap_free( host );
 390     if (hr != S_OK) return hr;
 391
 392     if ((listener->u.udp.socket = socket( addr->sa_family, SOCK_DGRAM, 0 )) == -1)
 393         return HRESULT_FROM_WIN32( WSAGetLastError() );
 394
 395     if (bind( listener->u.udp.socket, addr, addr_len ) < 0)
 396     {
 397         closesocket( listener->u.udp.socket );
 398         listener->u.udp.socket = -1;
 399         return HRESULT_FROM_WIN32( WSAGetLastError() );
 400     }
 401
 402     listener->state = WS_LISTENER_STATE_OPEN;
 403     return S_OK;
 404 }
 405
 406 static HRESULT open_listener( struct listener *listener, const WS_STRING *url )
 407 {
 408     switch (listener->binding)
 409     {
 410     case WS_TCP_CHANNEL_BINDING:
 411         return open_listener_tcp( listener, url );
 412
 413     case WS_UDP_CHANNEL_BINDING:
 414         return open_listener_udp( listener, url );
 415
 416     default:
 417         ERR( "unhandled binding %u\n", listener->binding );
 418         return E_NOTIMPL;
 419     }
 420 }
 421
 422 /**************************************************************************
 423  *          WsOpenListener              [webservices.@]
 424  */
 425 HRESULT WINAPI WsOpenListener( WS_LISTENER *handle, WS_STRING *url, const WS_ASYNC_CONTEXT *ctx, WS_ERROR *error )
 426 {
 427     struct listener *listener = (struct listener *)handle;
 428     HRESULT hr;
 429
 430     TRACE( "%p %s %p %p\n", handle, url ? debugstr_wn(url->chars, url->length) : "null", ctx, error );
 431     if (error) FIXME( "ignoring error parameter\n" );
 432     if (ctx) FIXME( "ignoring ctx parameter\n" );
 433
 434     if (!listener || !url) return E_INVALIDARG;
 435
 436     EnterCriticalSection( &listener->cs );
 437
 438     if (listener->magic != LISTENER_MAGIC)
 439     {
 440         LeaveCriticalSection( &listener->cs );
 441         return E_INVALIDARG;
 442     }
 443
 444     if (listener->state != WS_LISTENER_STATE_CREATED)
 445     {
 446         LeaveCriticalSection( &listener->cs );
 447         return WS_E_INVALID_OPERATION;
 448     }
 449
 450     hr = open_listener( listener, url );
 451
 452     LeaveCriticalSection( &listener->cs );
 453     return hr;
 454 }
 455
 456 static void close_listener( struct listener *listener )
 457 {
 458     reset_listener( listener );
 459     listener->state = WS_LISTENER_STATE_CLOSED;
 460 }
 461
 462 /**************************************************************************
 463  *          WsCloseListener             [webservices.@]
 464  */
 465 HRESULT WINAPI WsCloseListener( WS_LISTENER *handle, const WS_ASYNC_CONTEXT *ctx, WS_ERROR *error )
 466 {
 467     struct listener *listener = (struct listener *)handle;
 468
 469     TRACE( "%p %p %p\n", handle, ctx, error );
 470     if (error) FIXME( "ignoring error parameter\n" );
 471     if (ctx) FIXME( "ignoring ctx parameter\n" );
 472
 473     if (!listener) return E_INVALIDARG;
 474
 475     EnterCriticalSection( &listener->cs );
 476
 477     if (listener->magic != LISTENER_MAGIC)
 478     {
 479         LeaveCriticalSection( &listener->cs );
 480         return E_INVALIDARG;
 481     }
 482
 483     close_listener( listener );
 484
 485     LeaveCriticalSection( &listener->cs );
 486     return S_OK;
 487 }
 488
 489 /**************************************************************************
 490  *          WsResetListener             [webservices.@]
 491  */
 492 HRESULT WINAPI WsResetListener( WS_LISTENER *handle, WS_ERROR *error )
 493 {
 494     struct listener *listener = (struct listener *)handle;
 495
 496     TRACE( "%p %p\n", handle, error );
 497     if (error) FIXME( "ignoring error parameter\n" );
 498
 499     if (!listener) return E_INVALIDARG;
 500
 501     EnterCriticalSection( &listener->cs );
 502
 503     if (listener->magic != LISTENER_MAGIC)
 504     {
 505         LeaveCriticalSection( &listener->cs );
 506         return E_INVALIDARG;
 507     }
 508
 509     if (listener->state != WS_LISTENER_STATE_CREATED && listener->state != WS_LISTENER_STATE_CLOSED)
 510     {
 511         LeaveCriticalSection( &listener->cs );
 512         return WS_E_INVALID_OPERATION;
 513     }
 514
 515     reset_listener( listener );
 516
 517     LeaveCriticalSection( &listener->cs );
 518     return S_OK;
 519 }
 520
 521 /**************************************************************************
 522  *          WsGetListenerProperty               [webservices.@]
 523  */
 524 HRESULT WINAPI WsGetListenerProperty( WS_LISTENER *handle, WS_LISTENER_PROPERTY_ID id, void *buf,
 525                                       ULONG size, WS_ERROR *error )
 526 {
 527     struct listener *listener = (struct listener *)handle;
 528     HRESULT hr = S_OK;
 529
 530     TRACE( "%p %u %p %u %p\n", handle, id, buf, size, error );
 531     if (error) FIXME( "ignoring error parameter\n" );
 532
 533     if (!listener) return E_INVALIDARG;
 534
 535     EnterCriticalSection( &listener->cs );
 536
 537     if (listener->magic != LISTENER_MAGIC)
 538     {
 539         LeaveCriticalSection( &listener->cs );
 540         return E_INVALIDARG;
 541     }
 542
 543     switch (id)
 544     {
 545     case WS_LISTENER_PROPERTY_STATE:
 546         if (!buf || size != sizeof(listener->state)) hr = E_INVALIDARG;
 547         else *(WS_LISTENER_STATE *)buf = listener->state;
 548         break;
 549
 550     case WS_LISTENER_PROPERTY_CHANNEL_TYPE:
 551         if (!buf || size != sizeof(listener->type)) hr = E_INVALIDARG;
 552         else *(WS_CHANNEL_TYPE *)buf = listener->type;
 553         break;
 554
 555     case WS_LISTENER_PROPERTY_CHANNEL_BINDING:
 556         if (!buf || size != sizeof(listener->binding)) hr = E_INVALIDARG;
 557         else *(WS_CHANNEL_BINDING *)buf = listener->binding;
 558         break;
 559
 560     default:
 561         hr = prop_get( listener->prop, listener->prop_count, id, buf, size );
 562     }
 563
 564     LeaveCriticalSection( &listener->cs );
 565     return hr;
 566 }
 567
 568 /**************************************************************************
 569  *          WsSetListenerProperty               [webservices.@]
 570  */
 571 HRESULT WINAPI WsSetListenerProperty( WS_LISTENER *handle, WS_LISTENER_PROPERTY_ID id, const void *value,
 572                                       ULONG size, WS_ERROR *error )
 573 {
 574     struct listener *listener = (struct listener *)handle;
 575     HRESULT hr;
 576
 577     TRACE( "%p %u %p %u\n", handle, id, value, size );
 578     if (error) FIXME( "ignoring error parameter\n" );
 579
 580     if (!listener) return E_INVALIDARG;
 581
 582     EnterCriticalSection( &listener->cs );
 583
 584     if (listener->magic != LISTENER_MAGIC)
 585     {
 586         LeaveCriticalSection( &listener->cs );
 587         return E_INVALIDARG;
 588     }
 589
 590     hr = prop_set( listener->prop, listener->prop_count, id, value, size );
 591
 592     LeaveCriticalSection( &listener->cs );
 593     return hr;
 594 }
 595
 596 /**************************************************************************
 597  *          WsAcceptChannel             [webservices.@]
 598  */
 599 HRESULT WINAPI WsAcceptChannel( WS_LISTENER *handle, WS_CHANNEL *channel_handle, const WS_ASYNC_CONTEXT *ctx,
 600                                 WS_ERROR *error )
 601 {
 602     struct listener *listener = (struct listener *)handle;
 603     HRESULT hr = E_NOTIMPL;
 604     HANDLE wait, cancel;
 605
 606     TRACE( "%p %p %p %p\n", handle, channel_handle, ctx, error );
 607     if (error) FIXME( "ignoring error parameter\n" );
 608     if (ctx) FIXME( "ignoring ctx parameter\n" );
 609
 610     if (!listener || !channel_handle) return E_INVALIDARG;
 611
 612     EnterCriticalSection( &listener->cs );
 613
 614     if (listener->magic != LISTENER_MAGIC)
 615     {
 616         LeaveCriticalSection( &listener->cs );
 617         return E_INVALIDARG;
 618     }
 619
 620     if (listener->state != WS_LISTENER_STATE_OPEN || listener->channel)
 621     {
 622         LeaveCriticalSection( &listener->cs );
 623         return WS_E_INVALID_OPERATION;
 624     }
 625
 626     wait = listener->wait;
 627     cancel = listener->cancel;
 628     listener->channel = channel_handle;
 629
 630     switch (listener->binding)
 631     {
 632     case WS_TCP_CHANNEL_BINDING:
 633     {
 634         SOCKET socket = listener->u.tcp.socket;
 635
 636         LeaveCriticalSection( &listener->cs );
 637         return channel_accept_tcp( socket, wait, cancel, channel_handle );
 638     }
 639     case WS_UDP_CHANNEL_BINDING:
 640     {
 641         SOCKET socket = listener->u.udp.socket;
 642
 643         LeaveCriticalSection( &listener->cs );
 644         return channel_accept_udp( socket, wait, cancel, channel_handle );
 645     }
 646     default:
 647         FIXME( "listener binding %u not supported\n", listener->binding );
 648         break;
 649     }
 650
 651     LeaveCriticalSection( &listener->cs );
 652     return hr;
 653 }