dlls/winhttp/net.c

   1 /*
   2  * Copyright 2008 Hans Leidekker for CodeWeavers
   3  * Copyright 2013 Jacek Caban for CodeWeavers
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include "config.h"
  21 #include "wine/port.h"
  22
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <errno.h>
  26 #include <assert.h>
  27
  28 #include <sys/types.h>
  29 #ifdef HAVE_SYS_SOCKET_H
  30 # include <sys/socket.h>
  31 #endif
  32 #ifdef HAVE_SYS_IOCTL_H
  33 # include <sys/ioctl.h>
  34 #endif
  35 #ifdef HAVE_SYS_FILIO_H
  36 # include <sys/filio.h>
  37 #endif
  38 #ifdef HAVE_POLL_H
  39 # include <poll.h>
  40 #endif
  41
  42 #define NONAMELESSUNION
  43
  44 #include "wine/debug.h"
  45 #include "wine/library.h"
  46
  47 #include "windef.h"
  48 #include "winbase.h"
  49 #include "winhttp.h"
  50 #include "wincrypt.h"
  51 #include "schannel.h"
  52
  53 #include "winhttp_private.h"
  54
  55 /* to avoid conflicts with the Unix socket headers */
  56 #define USE_WS_PREFIX
  57 #include "winsock2.h"
  58
  59 WINE_DEFAULT_DEBUG_CHANNEL(winhttp);
  60
  61 #ifndef HAVE_GETADDRINFO
  62
  63 /* critical section to protect non-reentrant gethostbyname() */
  64 static CRITICAL_SECTION cs_gethostbyname;
  65 static CRITICAL_SECTION_DEBUG critsect_debug =
  66 {
  67     0, 0, &cs_gethostbyname,
  68     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  69       0, 0, { (DWORD_PTR)(__FILE__ ": cs_gethostbyname") }
  70 };
  71 static CRITICAL_SECTION cs_gethostbyname = { &critsect_debug, -1, 0, 0, 0, 0 };
  72
  73 #endif
  74
  75 /* translate a unix error code into a winsock error code */
  76 static int sock_get_error( int err )
  77 {
  78 #if !defined(__MINGW32__) && !defined (_MSC_VER)
  79     switch (err)
  80     {
  81         case EINTR:             return WSAEINTR;
  82         case EBADF:             return WSAEBADF;
  83         case EPERM:
  84         case EACCES:            return WSAEACCES;
  85         case EFAULT:            return WSAEFAULT;
  86         case EINVAL:            return WSAEINVAL;
  87         case EMFILE:            return WSAEMFILE;
  88         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
  89         case EINPROGRESS:       return WSAEINPROGRESS;
  90         case EALREADY:          return WSAEALREADY;
  91         case ENOTSOCK:          return WSAENOTSOCK;
  92         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
  93         case EMSGSIZE:          return WSAEMSGSIZE;
  94         case EPROTOTYPE:        return WSAEPROTOTYPE;
  95         case ENOPROTOOPT:       return WSAENOPROTOOPT;
  96         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
  97         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
  98         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
  99         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 100         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 101         case EADDRINUSE:        return WSAEADDRINUSE;
 102         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 103         case ENETDOWN:          return WSAENETDOWN;
 104         case ENETUNREACH:       return WSAENETUNREACH;
 105         case ENETRESET:         return WSAENETRESET;
 106         case ECONNABORTED:      return WSAECONNABORTED;
 107         case EPIPE:
 108         case ECONNRESET:        return WSAECONNRESET;
 109         case ENOBUFS:           return WSAENOBUFS;
 110         case EISCONN:           return WSAEISCONN;
 111         case ENOTCONN:          return WSAENOTCONN;
 112         case ESHUTDOWN:         return WSAESHUTDOWN;
 113         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 114         case ETIMEDOUT:         return WSAETIMEDOUT;
 115         case ECONNREFUSED:      return WSAECONNREFUSED;
 116         case ELOOP:             return WSAELOOP;
 117         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 118         case EHOSTDOWN:         return WSAEHOSTDOWN;
 119         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 120         case ENOTEMPTY:         return WSAENOTEMPTY;
 121 #ifdef EPROCLIM
 122         case EPROCLIM:          return WSAEPROCLIM;
 123 #endif
 124 #ifdef EUSERS
 125         case EUSERS:            return WSAEUSERS;
 126 #endif
 127 #ifdef EDQUOT
 128         case EDQUOT:            return WSAEDQUOT;
 129 #endif
 130 #ifdef ESTALE
 131         case ESTALE:            return WSAESTALE;
 132 #endif
 133 #ifdef EREMOTE
 134         case EREMOTE:           return WSAEREMOTE;
 135 #endif
 136     default: errno = err; perror( "sock_set_error" ); return WSAEFAULT;
 137     }
 138 #endif
 139     return err;
 140 }
 141
 142 static int sock_send(int fd, const void *msg, size_t len, int flags)
 143 {
 144     int ret;
 145     do
 146     {
 147         if ((ret = send(fd, msg, len, flags)) == -1) WARN("send error %s\n", strerror(errno));
 148     }
 149     while(ret == -1 && errno == EINTR);
 150     return ret;
 151 }
 152
 153 static int sock_recv(int fd, void *msg, size_t len, int flags)
 154 {
 155     int ret;
 156     do
 157     {
 158         if ((ret = recv(fd, msg, len, flags)) == -1) WARN("recv error %s\n", strerror(errno));
 159     }
 160     while(ret == -1 && errno == EINTR);
 161     return ret;
 162 }
 163
 164 static DWORD netconn_verify_cert( PCCERT_CONTEXT cert, WCHAR *server, DWORD security_flags )
 165 {
 166     HCERTSTORE store = cert->hCertStore;
 167     BOOL ret;
 168     CERT_CHAIN_PARA chainPara = { sizeof(chainPara), { 0 } };
 169     PCCERT_CHAIN_CONTEXT chain;
 170     char oid_server_auth[] = szOID_PKIX_KP_SERVER_AUTH;
 171     char *server_auth[] = { oid_server_auth };
 172     DWORD err = ERROR_SUCCESS;
 173
 174     TRACE("verifying %s\n", debugstr_w( server ));
 175     chainPara.RequestedUsage.Usage.cUsageIdentifier = 1;
 176     chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = server_auth;
 177     if ((ret = CertGetCertificateChain( NULL, cert, NULL, store, &chainPara,
 178                                         CERT_CHAIN_REVOCATION_CHECK_CHAIN_EXCLUDE_ROOT,
 179                                         NULL, &chain )))
 180     {
 181         if (chain->TrustStatus.dwErrorStatus)
 182         {
 183             static const DWORD supportedErrors =
 184                 CERT_TRUST_IS_NOT_TIME_VALID |
 185                 CERT_TRUST_IS_UNTRUSTED_ROOT |
 186                 CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
 187
 188             if (chain->TrustStatus.dwErrorStatus & CERT_TRUST_IS_NOT_TIME_VALID)
 189             {
 190                 if (!(security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID))
 191                     err = ERROR_WINHTTP_SECURE_CERT_DATE_INVALID;
 192             }
 193             else if (chain->TrustStatus.dwErrorStatus &
 194                      CERT_TRUST_IS_UNTRUSTED_ROOT)
 195             {
 196                 if (!(security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA))
 197                     err = ERROR_WINHTTP_SECURE_INVALID_CA;
 198             }
 199             else if ((chain->TrustStatus.dwErrorStatus &
 200                       CERT_TRUST_IS_OFFLINE_REVOCATION) ||
 201                      (chain->TrustStatus.dwErrorStatus &
 202                       CERT_TRUST_REVOCATION_STATUS_UNKNOWN))
 203                 err = ERROR_WINHTTP_SECURE_CERT_REV_FAILED;
 204             else if (chain->TrustStatus.dwErrorStatus & CERT_TRUST_IS_REVOKED)
 205                 err = ERROR_WINHTTP_SECURE_CERT_REVOKED;
 206             else if (chain->TrustStatus.dwErrorStatus &
 207                 CERT_TRUST_IS_NOT_VALID_FOR_USAGE)
 208             {
 209                 if (!(security_flags & SECURITY_FLAG_IGNORE_CERT_WRONG_USAGE))
 210                     err = ERROR_WINHTTP_SECURE_CERT_WRONG_USAGE;
 211             }
 212             else if (chain->TrustStatus.dwErrorStatus & ~supportedErrors)
 213                 err = ERROR_WINHTTP_SECURE_INVALID_CERT;
 214         }
 215         if (!err)
 216         {
 217             CERT_CHAIN_POLICY_PARA policyPara;
 218             SSL_EXTRA_CERT_CHAIN_POLICY_PARA sslExtraPolicyPara;
 219             CERT_CHAIN_POLICY_STATUS policyStatus;
 220             CERT_CHAIN_CONTEXT chainCopy;
 221
 222             /* Clear chain->TrustStatus.dwErrorStatus so
 223              * CertVerifyCertificateChainPolicy will verify additional checks
 224              * rather than stopping with an existing, ignored error.
 225              */
 226             memcpy(&chainCopy, chain, sizeof(chainCopy));
 227             chainCopy.TrustStatus.dwErrorStatus = 0;
 228             sslExtraPolicyPara.u.cbSize = sizeof(sslExtraPolicyPara);
 229             sslExtraPolicyPara.dwAuthType = AUTHTYPE_SERVER;
 230             sslExtraPolicyPara.pwszServerName = server;
 231             sslExtraPolicyPara.fdwChecks = security_flags;
 232             policyPara.cbSize = sizeof(policyPara);
 233             policyPara.dwFlags = 0;
 234             policyPara.pvExtraPolicyPara = &sslExtraPolicyPara;
 235             ret = CertVerifyCertificateChainPolicy( CERT_CHAIN_POLICY_SSL,
 236                                                     &chainCopy, &policyPara,
 237                                                     &policyStatus );
 238             /* Any error in the policy status indicates that the
 239              * policy couldn't be verified.
 240              */
 241             if (ret && policyStatus.dwError)
 242             {
 243                 if (policyStatus.dwError == CERT_E_CN_NO_MATCH)
 244                     err = ERROR_WINHTTP_SECURE_CERT_CN_INVALID;
 245                 else
 246                     err = ERROR_WINHTTP_SECURE_INVALID_CERT;
 247             }
 248         }
 249         CertFreeCertificateChain( chain );
 250     }
 251     else
 252         err = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
 253     TRACE("returning %08x\n", err);
 254     return err;
 255 }
 256
 257 void netconn_unload( void )
 258 {
 259 #ifndef HAVE_GETADDRINFO
 260     DeleteCriticalSection(&cs_gethostbyname);
 261 #endif
 262 }
 263
 264 netconn_t *netconn_create( hostdata_t *host, const struct sockaddr_storage *sockaddr, int timeout )
 265 {
 266     netconn_t *conn;
 267     unsigned int addr_len;
 268     BOOL ret = FALSE;
 269     int res;
 270     ULONG state;
 271
 272     conn = heap_alloc_zero(sizeof(*conn));
 273     if (!conn) return NULL;
 274     conn->host = host;
 275     conn->sockaddr = *sockaddr;
 276     if ((conn->socket = socket( sockaddr->ss_family, SOCK_STREAM, 0 )) == -1)
 277     {
 278         WARN("unable to create socket (%s)\n", strerror(errno));
 279         set_last_error( sock_get_error( errno ) );
 280         heap_free(conn);
 281         return NULL;
 282     }
 283
 284     switch (conn->sockaddr.ss_family)
 285     {
 286     case AF_INET:
 287         addr_len = sizeof(struct sockaddr_in);
 288         break;
 289     case AF_INET6:
 290         addr_len = sizeof(struct sockaddr_in6);
 291         break;
 292     default:
 293         assert(0);
 294     }
 295
 296     if (timeout > 0)
 297     {
 298         state = 1;
 299         ioctlsocket( conn->socket, FIONBIO, &state );
 300     }
 301
 302     for (;;)
 303     {
 304         res = 0;
 305         if (connect( conn->socket, (const struct sockaddr *)&conn->sockaddr, addr_len ) < 0)
 306         {
 307             res = sock_get_error( errno );
 308             if (res == WSAEWOULDBLOCK || res == WSAEINPROGRESS)
 309             {
 310                 struct pollfd pfd;
 311
 312                 pfd.fd = conn->socket;
 313                 pfd.events = POLLOUT;
 314                 for (;;)
 315                 {
 316                     res = 0;
 317                     if (poll( &pfd, 1, timeout ) > 0)
 318                     {
 319                         ret = TRUE;
 320                         break;
 321                     }
 322                     else
 323                     {
 324                         res = sock_get_error( errno );
 325                         if (res != WSAEINTR) break;
 326                     }
 327                 }
 328             }
 329             if (res != WSAEINTR) break;
 330         }
 331         else
 332         {
 333             ret = TRUE;
 334             break;
 335         }
 336     }
 337     if (timeout > 0)
 338     {
 339         state = 0;
 340         ioctlsocket( conn->socket, FIONBIO, &state );
 341     }
 342     if (!ret)
 343     {
 344         WARN("unable to connect to host (%d)\n", res);
 345         set_last_error( res );
 346         netconn_close( conn );
 347         return NULL;
 348     }
 349     return conn;
 350 }
 351
 352 BOOL netconn_close( netconn_t *conn )
 353 {
 354     int res;
 355
 356     if (conn->secure)
 357     {
 358         heap_free( conn->peek_msg_mem );
 359         heap_free(conn->ssl_buf);
 360         heap_free(conn->extra_buf);
 361         DeleteSecurityContext(&conn->ssl_ctx);
 362     }
 363     res = closesocket( conn->socket );
 364     release_host( conn->host );
 365     heap_free(conn);
 366     if (res == -1)
 367     {
 368         set_last_error( sock_get_error( errno ) );
 369         return FALSE;
 370     }
 371     return TRUE;
 372 }
 373
 374 BOOL netconn_secure_connect( netconn_t *conn, WCHAR *hostname, DWORD security_flags, CredHandle *cred_handle )
 375 {
 376     SecBuffer out_buf = {0, SECBUFFER_TOKEN, NULL}, in_bufs[2] = {{0, SECBUFFER_TOKEN}, {0, SECBUFFER_EMPTY}};
 377     SecBufferDesc out_desc = {SECBUFFER_VERSION, 1, &out_buf}, in_desc = {SECBUFFER_VERSION, 2, in_bufs};
 378     BYTE *read_buf;
 379     SIZE_T read_buf_size = 2048;
 380     ULONG attrs = 0;
 381     CtxtHandle ctx;
 382     SSIZE_T size;
 383     const CERT_CONTEXT *cert;
 384     SECURITY_STATUS status;
 385     DWORD res = ERROR_SUCCESS;
 386
 387     const DWORD isc_req_flags = ISC_REQ_ALLOCATE_MEMORY|ISC_REQ_USE_SESSION_KEY|ISC_REQ_CONFIDENTIALITY
 388         |ISC_REQ_SEQUENCE_DETECT|ISC_REQ_REPLAY_DETECT|ISC_REQ_MANUAL_CRED_VALIDATION;
 389
 390     read_buf = heap_alloc(read_buf_size);
 391     if(!read_buf)
 392         return FALSE;
 393
 394     status = InitializeSecurityContextW(cred_handle, NULL, hostname, isc_req_flags, 0, 0, NULL, 0,
 395             &ctx, &out_desc, &attrs, NULL);
 396
 397     assert(status != SEC_E_OK);
 398
 399     while(status == SEC_I_CONTINUE_NEEDED || status == SEC_E_INCOMPLETE_MESSAGE) {
 400         if(out_buf.cbBuffer) {
 401             assert(status == SEC_I_CONTINUE_NEEDED);
 402
 403             TRACE("sending %u bytes\n", out_buf.cbBuffer);
 404
 405             size = sock_send(conn->socket, out_buf.pvBuffer, out_buf.cbBuffer, 0);
 406             if(size != out_buf.cbBuffer) {
 407                 ERR("send failed\n");
 408                 res = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
 409                 break;
 410             }
 411
 412             FreeContextBuffer(out_buf.pvBuffer);
 413             out_buf.pvBuffer = NULL;
 414             out_buf.cbBuffer = 0;
 415         }
 416
 417         if(status == SEC_I_CONTINUE_NEEDED) {
 418             assert(in_bufs[1].cbBuffer < read_buf_size);
 419
 420             memmove(read_buf, (BYTE*)in_bufs[0].pvBuffer+in_bufs[0].cbBuffer-in_bufs[1].cbBuffer, in_bufs[1].cbBuffer);
 421             in_bufs[0].cbBuffer = in_bufs[1].cbBuffer;
 422
 423             in_bufs[1].BufferType = SECBUFFER_EMPTY;
 424             in_bufs[1].cbBuffer = 0;
 425             in_bufs[1].pvBuffer = NULL;
 426         }
 427
 428         assert(in_bufs[0].BufferType == SECBUFFER_TOKEN);
 429         assert(in_bufs[1].BufferType == SECBUFFER_EMPTY);
 430
 431         if(in_bufs[0].cbBuffer + 1024 > read_buf_size) {
 432             BYTE *new_read_buf;
 433
 434             new_read_buf = heap_realloc(read_buf, read_buf_size + 1024);
 435             if(!new_read_buf) {
 436                 status = E_OUTOFMEMORY;
 437                 break;
 438             }
 439
 440             in_bufs[0].pvBuffer = read_buf = new_read_buf;
 441             read_buf_size += 1024;
 442         }
 443
 444         size = sock_recv(conn->socket, read_buf+in_bufs[0].cbBuffer, read_buf_size-in_bufs[0].cbBuffer, 0);
 445         if(size < 1) {
 446             status = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
 447             break;
 448         }
 449
 450         TRACE("recv %lu bytes\n", size);
 451
 452         in_bufs[0].cbBuffer += size;
 453         in_bufs[0].pvBuffer = read_buf;
 454         status = InitializeSecurityContextW(cred_handle, &ctx, hostname,  isc_req_flags, 0, 0, &in_desc,
 455                 0, NULL, &out_desc, &attrs, NULL);
 456         TRACE("InitializeSecurityContext ret %08x\n", status);
 457
 458         if(status == SEC_E_OK) {
 459             if(in_bufs[1].BufferType == SECBUFFER_EXTRA)
 460                 FIXME("SECBUFFER_EXTRA not supported\n");
 461
 462             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_STREAM_SIZES, &conn->ssl_sizes);
 463             if(status != SEC_E_OK) {
 464                 WARN("Could not get sizes\n");
 465                 break;
 466             }
 467
 468             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&cert);
 469             if(status == SEC_E_OK) {
 470                 res = netconn_verify_cert(cert, hostname, security_flags);
 471                 CertFreeCertificateContext(cert);
 472                 if(res != ERROR_SUCCESS) {
 473                     WARN("cert verify failed: %u\n", res);
 474                     break;
 475                 }
 476             }else {
 477                 WARN("Could not get cert\n");
 478                 break;
 479             }
 480
 481             conn->ssl_buf = heap_alloc(conn->ssl_sizes.cbHeader + conn->ssl_sizes.cbMaximumMessage + conn->ssl_sizes.cbTrailer);
 482             if(!conn->ssl_buf) {
 483                 res = GetLastError();
 484                 break;
 485             }
 486         }
 487     }
 488
 489     heap_free(read_buf);
 490
 491     if(status != SEC_E_OK || res != ERROR_SUCCESS) {
 492         WARN("Failed to initialize security context failed: %08x\n", status);
 493         heap_free(conn->ssl_buf);
 494         conn->ssl_buf = NULL;
 495         DeleteSecurityContext(&ctx);
 496         set_last_error(res ? res : ERROR_WINHTTP_SECURE_CHANNEL_ERROR);
 497         return FALSE;
 498     }
 499
 500
 501     TRACE("established SSL connection\n");
 502     conn->secure = TRUE;
 503     conn->ssl_ctx = ctx;
 504     return TRUE;
 505 }
 506
 507 static BOOL send_ssl_chunk(netconn_t *conn, const void *msg, size_t size)
 508 {
 509     SecBuffer bufs[4] = {
 510         {conn->ssl_sizes.cbHeader, SECBUFFER_STREAM_HEADER, conn->ssl_buf},
 511         {size,  SECBUFFER_DATA, conn->ssl_buf+conn->ssl_sizes.cbHeader},
 512         {conn->ssl_sizes.cbTrailer, SECBUFFER_STREAM_TRAILER, conn->ssl_buf+conn->ssl_sizes.cbHeader+size},
 513         {0, SECBUFFER_EMPTY, NULL}
 514     };
 515     SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
 516     SECURITY_STATUS res;
 517
 518     memcpy(bufs[1].pvBuffer, msg, size);
 519     res = EncryptMessage(&conn->ssl_ctx, 0, &buf_desc, 0);
 520     if(res != SEC_E_OK) {
 521         WARN("EncryptMessage failed\n");
 522         return FALSE;
 523     }
 524
 525     if(sock_send(conn->socket, conn->ssl_buf, bufs[0].cbBuffer+bufs[1].cbBuffer+bufs[2].cbBuffer, 0) < 1) {
 526         WARN("send failed\n");
 527         return FALSE;
 528     }
 529
 530     return TRUE;
 531 }
 532
 533 BOOL netconn_send( netconn_t *conn, const void *msg, size_t len, int *sent )
 534 {
 535     if (conn->secure)
 536     {
 537         const BYTE *ptr = msg;
 538         size_t chunk_size;
 539
 540         *sent = 0;
 541
 542         while(len) {
 543             chunk_size = min(len, conn->ssl_sizes.cbMaximumMessage);
 544             if(!send_ssl_chunk(conn, ptr, chunk_size))
 545                 return FALSE;
 546
 547             *sent += chunk_size;
 548             ptr += chunk_size;
 549             len -= chunk_size;
 550         }
 551
 552         return TRUE;
 553     }
 554     if ((*sent = sock_send( conn->socket, msg, len, 0 )) == -1)
 555     {
 556         set_last_error( sock_get_error( errno ) );
 557         return FALSE;
 558     }
 559     return TRUE;
 560 }
 561
 562 static BOOL read_ssl_chunk(netconn_t *conn, void *buf, SIZE_T buf_size, SIZE_T *ret_size, BOOL *eof)
 563 {
 564     const SIZE_T ssl_buf_size = conn->ssl_sizes.cbHeader+conn->ssl_sizes.cbMaximumMessage+conn->ssl_sizes.cbTrailer;
 565     SecBuffer bufs[4];
 566     SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
 567     SSIZE_T size, buf_len;
 568     unsigned int i;
 569     SECURITY_STATUS res;
 570
 571     assert(conn->extra_len < ssl_buf_size);
 572
 573     if(conn->extra_len) {
 574         memcpy(conn->ssl_buf, conn->extra_buf, conn->extra_len);
 575         buf_len = conn->extra_len;
 576         conn->extra_len = 0;
 577         heap_free(conn->extra_buf);
 578         conn->extra_buf = NULL;
 579     }else {
 580         buf_len = sock_recv(conn->socket, conn->ssl_buf+conn->extra_len, ssl_buf_size-conn->extra_len, 0);
 581         if(buf_len < 0)
 582             return FALSE;
 583
 584         if(!buf_len) {
 585             *eof = TRUE;
 586             return TRUE;
 587         }
 588     }
 589
 590     *ret_size = 0;
 591     *eof = FALSE;
 592
 593     do {
 594         memset(bufs, 0, sizeof(bufs));
 595         bufs[0].BufferType = SECBUFFER_DATA;
 596         bufs[0].cbBuffer = buf_len;
 597         bufs[0].pvBuffer = conn->ssl_buf;
 598
 599         res = DecryptMessage(&conn->ssl_ctx, &buf_desc, 0, NULL);
 600         switch(res) {
 601         case SEC_E_OK:
 602             break;
 603         case SEC_I_CONTEXT_EXPIRED:
 604             TRACE("context expired\n");
 605             *eof = TRUE;
 606             return TRUE;
 607         case SEC_E_INCOMPLETE_MESSAGE:
 608             assert(buf_len < ssl_buf_size);
 609
 610             size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
 611             if(size < 1)
 612                 return FALSE;
 613
 614             buf_len += size;
 615             continue;
 616         default:
 617             WARN("failed: %08x\n", res);
 618             return FALSE;
 619         }
 620     } while(res != SEC_E_OK);
 621
 622     for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
 623         if(bufs[i].BufferType == SECBUFFER_DATA) {
 624             size = min(buf_size, bufs[i].cbBuffer);
 625             memcpy(buf, bufs[i].pvBuffer, size);
 626             if(size < bufs[i].cbBuffer) {
 627                 assert(!conn->peek_len);
 628                 conn->peek_msg_mem = conn->peek_msg = heap_alloc(bufs[i].cbBuffer - size);
 629                 if(!conn->peek_msg)
 630                     return FALSE;
 631                 conn->peek_len = bufs[i].cbBuffer-size;
 632                 memcpy(conn->peek_msg, (char*)bufs[i].pvBuffer+size, conn->peek_len);
 633             }
 634
 635             *ret_size = size;
 636         }
 637     }
 638
 639     for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
 640         if(bufs[i].BufferType == SECBUFFER_EXTRA) {
 641             conn->extra_buf = heap_alloc(bufs[i].cbBuffer);
 642             if(!conn->extra_buf)
 643                 return FALSE;
 644
 645             conn->extra_len = bufs[i].cbBuffer;
 646             memcpy(conn->extra_buf, bufs[i].pvBuffer, conn->extra_len);
 647         }
 648     }
 649
 650     return TRUE;
 651 }
 652
 653 BOOL netconn_recv( netconn_t *conn, void *buf, size_t len, int flags, int *recvd )
 654 {
 655     *recvd = 0;
 656     if (!len) return TRUE;
 657
 658     if (conn->secure)
 659     {
 660         SIZE_T size, cread;
 661         BOOL res, eof;
 662
 663         if (conn->peek_msg)
 664         {
 665             *recvd = min( len, conn->peek_len );
 666             memcpy( buf, conn->peek_msg, *recvd );
 667             conn->peek_len -= *recvd;
 668             conn->peek_msg += *recvd;
 669
 670             if (conn->peek_len == 0)
 671             {
 672                 heap_free( conn->peek_msg_mem );
 673                 conn->peek_msg_mem = NULL;
 674                 conn->peek_msg = NULL;
 675             }
 676             /* check if we have enough data from the peek buffer */
 677             if (!(flags & MSG_WAITALL) || *recvd == len) return TRUE;
 678         }
 679         size = *recvd;
 680
 681         do {
 682             res = read_ssl_chunk(conn, (BYTE*)buf+size, len-size, &cread, &eof);
 683             if(!res) {
 684                 WARN("read_ssl_chunk failed\n");
 685                 if(!size)
 686                     return FALSE;
 687                 break;
 688             }
 689
 690             if(eof) {
 691                 TRACE("EOF\n");
 692                 break;
 693             }
 694
 695             size += cread;
 696         }while(!size || ((flags & MSG_WAITALL) && size < len));
 697
 698         TRACE("received %ld bytes\n", size);
 699         *recvd = size;
 700         return TRUE;
 701     }
 702     if ((*recvd = sock_recv( conn->socket, buf, len, flags )) == -1)
 703     {
 704         set_last_error( sock_get_error( errno ) );
 705         return FALSE;
 706     }
 707     return TRUE;
 708 }
 709
 710 ULONG netconn_query_data_available( netconn_t *conn )
 711 {
 712     return conn->secure ? conn->peek_len : 0;
 713 }
 714
 715 DWORD netconn_set_timeout( netconn_t *netconn, BOOL send, int value )
 716 {
 717     struct timeval tv;
 718
 719     /* value is in milliseconds, convert to struct timeval */
 720     tv.tv_sec = value / 1000;
 721     tv.tv_usec = (value % 1000) * 1000;
 722
 723     if (setsockopt( netconn->socket, SOL_SOCKET, send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&tv, sizeof(tv) ) == -1)
 724     {
 725         WARN("setsockopt failed (%s)\n", strerror( errno ));
 726         return sock_get_error( errno );
 727     }
 728     return ERROR_SUCCESS;
 729 }
 730
 731 BOOL netconn_is_alive( netconn_t *netconn )
 732 {
 733 #ifdef MSG_DONTWAIT
 734     ssize_t len;
 735     BYTE b;
 736
 737     len = recv( netconn->socket, &b, 1, MSG_PEEK | MSG_DONTWAIT );
 738     return len == 1 || (len == -1 && errno == EWOULDBLOCK);
 739 #elif defined(__MINGW32__) || defined(_MSC_VER)
 740     ULONG mode;
 741     int len;
 742     char b;
 743
 744     mode = 1;
 745     if(!ioctlsocket(netconn->socket, FIONBIO, &mode))
 746         return FALSE;
 747
 748     len = recv(netconn->socket, &b, 1, MSG_PEEK);
 749
 750     mode = 0;
 751     if(!ioctlsocket(netconn->socket, FIONBIO, &mode))
 752         return FALSE;
 753
 754     return len == 1 || (len == -1 && WSAGetLastError() == WSAEWOULDBLOCK);
 755 #else
 756     FIXME("not supported on this platform\n");
 757     return TRUE;
 758 #endif
 759 }
 760
 761 static DWORD resolve_hostname( const WCHAR *hostnameW, INTERNET_PORT port, struct sockaddr_storage *sa )
 762 {
 763     char *hostname;
 764 #ifdef HAVE_GETADDRINFO
 765     struct addrinfo *res, hints;
 766     int ret;
 767 #else
 768     struct hostent *he;
 769     struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 770 #endif
 771
 772     if (!(hostname = strdupWA( hostnameW ))) return ERROR_OUTOFMEMORY;
 773
 774 #ifdef HAVE_GETADDRINFO
 775     memset( &hints, 0, sizeof(struct addrinfo) );
 776     /* Prefer IPv4 to IPv6 addresses, since some web servers do not listen on
 777      * their IPv6 addresses even though they have IPv6 addresses in the DNS.
 778      */
 779     hints.ai_family = AF_INET;
 780
 781     ret = getaddrinfo( hostname, NULL, &hints, &res );
 782     if (ret != 0)
 783     {
 784         TRACE("failed to get IPv4 address of %s (%s), retrying with IPv6\n", debugstr_w(hostnameW), gai_strerror(ret));
 785         hints.ai_family = AF_INET6;
 786         ret = getaddrinfo( hostname, NULL, &hints, &res );
 787         if (ret != 0)
 788         {
 789             TRACE("failed to get address of %s (%s)\n", debugstr_w(hostnameW), gai_strerror(ret));
 790             heap_free( hostname );
 791             return ERROR_WINHTTP_NAME_NOT_RESOLVED;
 792         }
 793     }
 794     heap_free( hostname );
 795     memcpy( sa, res->ai_addr, res->ai_addrlen );
 796     /* Copy port */
 797     switch (res->ai_family)
 798     {
 799     case AF_INET:
 800         ((struct sockaddr_in *)sa)->sin_port = htons( port );
 801         break;
 802     case AF_INET6:
 803         ((struct sockaddr_in6 *)sa)->sin6_port = htons( port );
 804         break;
 805     }
 806
 807     freeaddrinfo( res );
 808     return ERROR_SUCCESS;
 809 #else
 810     EnterCriticalSection( &cs_gethostbyname );
 811
 812     he = gethostbyname( hostname );
 813     heap_free( hostname );
 814     if (!he)
 815     {
 816         TRACE("failed to get address of %s (%d)\n", debugstr_w(hostnameW), h_errno);
 817         LeaveCriticalSection( &cs_gethostbyname );
 818         return ERROR_WINHTTP_NAME_NOT_RESOLVED;
 819     }
 820     memset( sa, 0, sizeof(struct sockaddr_in) );
 821     memcpy( &sin->sin_addr, he->h_addr, he->h_length );
 822     sin->sin_family = he->h_addrtype;
 823     sin->sin_port = htons( port );
 824
 825     LeaveCriticalSection( &cs_gethostbyname );
 826     return ERROR_SUCCESS;
 827 #endif
 828 }
 829
 830 struct resolve_args
 831 {
 832     const WCHAR             *hostname;
 833     INTERNET_PORT            port;
 834     struct sockaddr_storage *sa;
 835 };
 836
 837 static DWORD CALLBACK resolve_proc( LPVOID arg )
 838 {
 839     struct resolve_args *ra = arg;
 840     return resolve_hostname( ra->hostname, ra->port, ra->sa );
 841 }
 842
 843 BOOL netconn_resolve( WCHAR *hostname, INTERNET_PORT port, struct sockaddr_storage *sa, int timeout )
 844 {
 845     DWORD ret;
 846
 847     if (timeout)
 848     {
 849         DWORD status;
 850         HANDLE thread;
 851         struct resolve_args ra;
 852
 853         ra.hostname = hostname;
 854         ra.port     = port;
 855         ra.sa       = sa;
 856
 857         thread = CreateThread( NULL, 0, resolve_proc, &ra, 0, NULL );
 858         if (!thread) return FALSE;
 859
 860         status = WaitForSingleObject( thread, timeout );
 861         if (status == WAIT_OBJECT_0) GetExitCodeThread( thread, &ret );
 862         else ret = ERROR_WINHTTP_TIMEOUT;
 863         CloseHandle( thread );
 864     }
 865     else ret = resolve_hostname( hostname, port, sa );
 866
 867     if (ret)
 868     {
 869         set_last_error( ret );
 870         return FALSE;
 871     }
 872     return TRUE;
 873 }
 874
 875 const void *netconn_get_certificate( netconn_t *conn )
 876 {
 877     const CERT_CONTEXT *ret;
 878     SECURITY_STATUS res;
 879
 880     if (!conn->secure) return NULL;
 881     res = QueryContextAttributesW(&conn->ssl_ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&ret);
 882     return res == SEC_E_OK ? ret : NULL;
 883 }
 884
 885 int netconn_get_cipher_strength( netconn_t *conn )
 886 {
 887     SecPkgContext_ConnectionInfo conn_info;
 888     SECURITY_STATUS res;
 889
 890     if (!conn->secure) return 0;
 891     res = QueryContextAttributesW(&conn->ssl_ctx, SECPKG_ATTR_CONNECTION_INFO, (void*)&conn_info);
 892     if(res != SEC_E_OK)
 893         WARN("QueryContextAttributesW failed: %08x\n", res);
 894     return res == SEC_E_OK ? conn_info.dwCipherStrength : 0;
 895 }