dlls/winhttp/net.c

   1 /*
   2  * Copyright 2008 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 "config.h"
  20 #include "wine/port.h"
  21
  22 #include <stdarg.h>
  23 #include <stdio.h>
  24 #include <errno.h>
  25
  26 #include <sys/types.h>
  27 #ifdef HAVE_SYS_SOCKET_H
  28 # include <sys/socket.h>
  29 #endif
  30 #ifdef HAVE_SYS_IOCTL_H
  31 # include <sys/ioctl.h>
  32 #endif
  33 #ifdef HAVE_SYS_FILIO_H
  34 # include <sys/filio.h>
  35 #endif
  36 #ifdef HAVE_POLL_H
  37 # include <poll.h>
  38 #endif
  39 #ifdef HAVE_OPENSSL_SSL_H
  40 # include <openssl/ssl.h>
  41 #undef FAR
  42 #undef DSA
  43 #endif
  44
  45 #include "wine/debug.h"
  46 #include "wine/library.h"
  47
  48 #include "windef.h"
  49 #include "winbase.h"
  50 #include "winhttp.h"
  51
  52 /* to avoid conflicts with the Unix socket headers */
  53 #define USE_WS_PREFIX
  54 #include "winsock2.h"
  55
  56 #include "winhttp_private.h"
  57
  58 WINE_DEFAULT_DEBUG_CHANNEL(winhttp);
  59
  60 #define DEFAULT_SEND_TIMEOUT        30
  61 #define DEFAULT_RECEIVE_TIMEOUT     30
  62
  63 #ifndef HAVE_GETADDRINFO
  64
  65 /* critical section to protect non-reentrant gethostbyname() */
  66 static CRITICAL_SECTION cs_gethostbyname;
  67 static CRITICAL_SECTION_DEBUG critsect_debug =
  68 {
  69     0, 0, &cs_gethostbyname,
  70     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  71       0, 0, { (DWORD_PTR)(__FILE__ ": cs_gethostbyname") }
  72 };
  73 static CRITICAL_SECTION cs_gethostbyname = { &critsect_debug, -1, 0, 0, 0, 0 };
  74
  75 #endif
  76
  77 #ifdef SONAME_LIBSSL
  78
  79 #include <openssl/err.h>
  80
  81 static void *libssl_handle;
  82 static void *libcrypto_handle;
  83
  84 static SSL_METHOD *method;
  85
  86 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  87
  88 MAKE_FUNCPTR( SSL_library_init );
  89 MAKE_FUNCPTR( SSL_load_error_strings );
  90 MAKE_FUNCPTR( SSLv23_method );
  91 MAKE_FUNCPTR( SSL_CTX_new );
  92 MAKE_FUNCPTR( SSL_CTX_free );
  93 MAKE_FUNCPTR( SSL_new );
  94 MAKE_FUNCPTR( SSL_free );
  95 MAKE_FUNCPTR( SSL_set_fd );
  96 MAKE_FUNCPTR( SSL_connect );
  97 MAKE_FUNCPTR( SSL_shutdown );
  98 MAKE_FUNCPTR( SSL_write );
  99 MAKE_FUNCPTR( SSL_read );
 100 MAKE_FUNCPTR( SSL_get_verify_result );
 101 MAKE_FUNCPTR( SSL_get_peer_certificate );
 102 MAKE_FUNCPTR( SSL_CTX_get_timeout );
 103 MAKE_FUNCPTR( SSL_CTX_set_timeout );
 104 MAKE_FUNCPTR( SSL_CTX_set_default_verify_paths );
 105
 106 MAKE_FUNCPTR( BIO_new_fp );
 107 MAKE_FUNCPTR( ERR_get_error );
 108 MAKE_FUNCPTR( ERR_error_string );
 109 #undef MAKE_FUNCPTR
 110
 111 #endif
 112
 113 /* translate a unix error code into a winsock error code */
 114 static int sock_get_error( int err )
 115 {
 116     switch (err)
 117     {
 118         case EINTR:             return WSAEINTR;
 119         case EBADF:             return WSAEBADF;
 120         case EPERM:
 121         case EACCES:            return WSAEACCES;
 122         case EFAULT:            return WSAEFAULT;
 123         case EINVAL:            return WSAEINVAL;
 124         case EMFILE:            return WSAEMFILE;
 125         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 126         case EINPROGRESS:       return WSAEINPROGRESS;
 127         case EALREADY:          return WSAEALREADY;
 128         case ENOTSOCK:          return WSAENOTSOCK;
 129         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 130         case EMSGSIZE:          return WSAEMSGSIZE;
 131         case EPROTOTYPE:        return WSAEPROTOTYPE;
 132         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 133         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 134         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 135         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 136         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 137         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 138         case EADDRINUSE:        return WSAEADDRINUSE;
 139         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 140         case ENETDOWN:          return WSAENETDOWN;
 141         case ENETUNREACH:       return WSAENETUNREACH;
 142         case ENETRESET:         return WSAENETRESET;
 143         case ECONNABORTED:      return WSAECONNABORTED;
 144         case EPIPE:
 145         case ECONNRESET:        return WSAECONNRESET;
 146         case ENOBUFS:           return WSAENOBUFS;
 147         case EISCONN:           return WSAEISCONN;
 148         case ENOTCONN:          return WSAENOTCONN;
 149         case ESHUTDOWN:         return WSAESHUTDOWN;
 150         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 151         case ETIMEDOUT:         return WSAETIMEDOUT;
 152         case ECONNREFUSED:      return WSAECONNREFUSED;
 153         case ELOOP:             return WSAELOOP;
 154         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 155         case EHOSTDOWN:         return WSAEHOSTDOWN;
 156         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 157         case ENOTEMPTY:         return WSAENOTEMPTY;
 158 #ifdef EPROCLIM
 159         case EPROCLIM:          return WSAEPROCLIM;
 160 #endif
 161 #ifdef EUSERS
 162         case EUSERS:            return WSAEUSERS;
 163 #endif
 164 #ifdef EDQUOT
 165         case EDQUOT:            return WSAEDQUOT;
 166 #endif
 167 #ifdef ESTALE
 168         case ESTALE:            return WSAESTALE;
 169 #endif
 170 #ifdef EREMOTE
 171         case EREMOTE:           return WSAEREMOTE;
 172 #endif
 173     default: errno = err; perror( "sock_set_error" ); return WSAEFAULT;
 174     }
 175     return err;
 176 }
 177
 178 BOOL netconn_init( netconn_t *conn, BOOL secure )
 179 {
 180     conn->socket = -1;
 181     if (!secure) return TRUE;
 182
 183 #if defined(SONAME_LIBSSL) && defined(SONAME_LIBCRYPTO)
 184     if (libssl_handle) return TRUE;
 185     if (!(libssl_handle = wine_dlopen( SONAME_LIBSSL, RTLD_NOW, NULL, 0 )))
 186     {
 187         ERR("Trying to use SSL but couldn't load %s. Expect trouble.\n", SONAME_LIBSSL);
 188         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 189         return FALSE;
 190     }
 191     if (!(libcrypto_handle = wine_dlopen( SONAME_LIBCRYPTO, RTLD_NOW, NULL, 0 )))
 192     {
 193         ERR("Trying to use SSL but couldn't load %s. Expect trouble.\n", SONAME_LIBCRYPTO);
 194         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 195         return FALSE;
 196     }
 197 #define LOAD_FUNCPTR(x) \
 198     if (!(p##x = wine_dlsym( libssl_handle, #x, NULL, 0 ))) \
 199     { \
 200         ERR("Failed to load symbol %s\n", #x); \
 201         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR ); \
 202         return FALSE; \
 203     }
 204     LOAD_FUNCPTR( SSL_library_init );
 205     LOAD_FUNCPTR( SSL_load_error_strings );
 206     LOAD_FUNCPTR( SSLv23_method );
 207     LOAD_FUNCPTR( SSL_CTX_new );
 208     LOAD_FUNCPTR( SSL_CTX_free );
 209     LOAD_FUNCPTR( SSL_new );
 210     LOAD_FUNCPTR( SSL_free );
 211     LOAD_FUNCPTR( SSL_set_fd );
 212     LOAD_FUNCPTR( SSL_connect );
 213     LOAD_FUNCPTR( SSL_shutdown );
 214     LOAD_FUNCPTR( SSL_write );
 215     LOAD_FUNCPTR( SSL_read );
 216     LOAD_FUNCPTR( SSL_get_verify_result );
 217     LOAD_FUNCPTR( SSL_get_peer_certificate );
 218     LOAD_FUNCPTR( SSL_CTX_get_timeout );
 219     LOAD_FUNCPTR( SSL_CTX_set_timeout );
 220     LOAD_FUNCPTR( SSL_CTX_set_default_verify_paths );
 221 #undef LOAD_FUNCPTR
 222
 223 #define LOAD_FUNCPTR(x) \
 224     if (!(p##x = wine_dlsym( libcrypto_handle, #x, NULL, 0 ))) \
 225     { \
 226         ERR("Failed to load symbol %s\n", #x); \
 227         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR ); \
 228         return FALSE; \
 229     }
 230     LOAD_FUNCPTR( BIO_new_fp );
 231     LOAD_FUNCPTR( ERR_get_error );
 232     LOAD_FUNCPTR( ERR_error_string );
 233 #undef LOAD_FUNCPTR
 234
 235     pSSL_library_init();
 236     pSSL_load_error_strings();
 237     pBIO_new_fp( stderr, BIO_NOCLOSE );
 238
 239     method = pSSLv23_method();
 240     conn->ssl_ctx = pSSL_CTX_new( method );
 241
 242 #else
 243     WARN("SSL support not compiled in.\n");
 244     set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 245     return FALSE;
 246 #endif
 247     return TRUE;
 248 }
 249
 250 BOOL netconn_connected( netconn_t *conn )
 251 {
 252     return (conn->socket != -1);
 253 }
 254
 255 BOOL netconn_create( netconn_t *conn, int domain, int type, int protocol )
 256 {
 257     if ((conn->socket = socket( domain, type, protocol )) == -1)
 258     {
 259         WARN("unable to create socket (%s)\n", strerror(errno));
 260         set_last_error( sock_get_error( errno ) );
 261         return FALSE;
 262     }
 263     return TRUE;
 264 }
 265
 266 BOOL netconn_close( netconn_t *conn )
 267 {
 268     int res;
 269
 270 #ifdef SONAME_LIBSSL
 271     if (conn->secure)
 272     {
 273         heap_free( conn->peek_msg_mem );
 274         conn->peek_msg_mem = NULL;
 275         conn->peek_msg = NULL;
 276         conn->peek_len = 0;
 277
 278         pSSL_shutdown( conn->ssl_conn );
 279         pSSL_free( conn->ssl_conn );
 280         pSSL_CTX_free( conn->ssl_ctx );
 281
 282         conn->ssl_conn = NULL;
 283         conn->ssl_ctx = NULL;
 284         conn->secure = FALSE;
 285     }
 286 #endif
 287     res = close( conn->socket );
 288     conn->socket = -1;
 289     if (res == -1)
 290     {
 291         set_last_error( sock_get_error( errno ) );
 292         return FALSE;
 293     }
 294     return TRUE;
 295 }
 296
 297 BOOL netconn_connect( netconn_t *conn, const struct sockaddr *sockaddr, unsigned int addr_len )
 298 {
 299     if (connect( conn->socket, sockaddr, addr_len ) == -1)
 300     {
 301         WARN("unable to connect to host (%s)\n", strerror(errno));
 302         set_last_error( sock_get_error( errno ) );
 303         return FALSE;
 304     }
 305     return TRUE;
 306 }
 307
 308 BOOL netconn_secure_connect( netconn_t *conn )
 309 {
 310 #ifdef SONAME_LIBSSL
 311     X509 *cert;
 312     long res;
 313
 314     if (!pSSL_CTX_set_default_verify_paths( conn->ssl_ctx ))
 315     {
 316         ERR("SSL_CTX_set_default_verify_paths failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 317         set_last_error( ERROR_OUTOFMEMORY );
 318         return FALSE;
 319     }
 320     if (!(conn->ssl_conn = pSSL_new( conn->ssl_ctx )))
 321     {
 322         ERR("SSL_new failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 323         set_last_error( ERROR_OUTOFMEMORY );
 324         goto fail;
 325     }
 326     if (!pSSL_set_fd( conn->ssl_conn, conn->socket ))
 327     {
 328         ERR("SSL_set_fd failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 329         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 330         goto fail;
 331     }
 332     if (pSSL_connect( conn->ssl_conn ) <= 0)
 333     {
 334         ERR("SSL_connect failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 335         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 336         goto fail;
 337     }
 338     if (!(cert = pSSL_get_peer_certificate( conn->ssl_conn )))
 339     {
 340         ERR("No certificate for server: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 341         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 342         goto fail;
 343     }
 344     if ((res = pSSL_get_verify_result( conn->ssl_conn )) != X509_V_OK)
 345     {
 346         /* FIXME: we should set an error and return, but we only print an error at the moment */
 347         ERR("couldn't verify server certificate (%ld)\n", res);
 348     }
 349     TRACE("established SSL connection\n");
 350     conn->secure = TRUE;
 351     return TRUE;
 352
 353 fail:
 354     if (conn->ssl_conn)
 355     {
 356         pSSL_shutdown( conn->ssl_conn );
 357         pSSL_free( conn->ssl_conn );
 358         conn->ssl_conn = NULL;
 359     }
 360 #endif
 361     return FALSE;
 362 }
 363
 364 BOOL netconn_send( netconn_t *conn, const void *msg, size_t len, int flags, int *sent )
 365 {
 366     if (!netconn_connected( conn )) return FALSE;
 367     if (conn->secure)
 368     {
 369 #ifdef SONAME_LIBSSL
 370         if (flags) FIXME("SSL_write doesn't support any flags (%08x)\n", flags);
 371         *sent = pSSL_write( conn->ssl_conn, msg, len );
 372         if (*sent < 1 && len) return FALSE;
 373         return TRUE;
 374 #else
 375         return FALSE;
 376 #endif
 377     }
 378     if ((*sent = send( conn->socket, msg, len, flags )) == -1)
 379     {
 380         set_last_error( sock_get_error( errno ) );
 381         return FALSE;
 382     }
 383     return TRUE;
 384 }
 385
 386 BOOL netconn_recv( netconn_t *conn, void *buf, size_t len, int flags, int *recvd )
 387 {
 388     *recvd = 0;
 389     if (!netconn_connected( conn )) return FALSE;
 390     if (!len) return TRUE;
 391
 392     if (conn->secure)
 393     {
 394 #ifdef SONAME_LIBSSL
 395         if (flags & ~(MSG_PEEK | MSG_WAITALL))
 396             FIXME("SSL_read does not support the following flags: %08x\n", flags);
 397
 398         /* this ugly hack is all for MSG_PEEK */
 399         if (flags & MSG_PEEK && !conn->peek_msg)
 400         {
 401             if (!(conn->peek_msg = conn->peek_msg_mem = heap_alloc( len + 1 ))) return FALSE;
 402         }
 403         else if (flags & MSG_PEEK && conn->peek_msg)
 404         {
 405             if (len < conn->peek_len) FIXME("buffer isn't big enough, should we wrap?\n");
 406             *recvd = min( len, conn->peek_len );
 407             memcpy( buf, conn->peek_msg, *recvd );
 408             return TRUE;
 409         }
 410         else if (conn->peek_msg)
 411         {
 412             *recvd = min( len, conn->peek_len );
 413             memcpy( buf, conn->peek_msg, *recvd );
 414             conn->peek_len -= *recvd;
 415             conn->peek_msg += *recvd;
 416
 417             if (conn->peek_len == 0)
 418             {
 419                 heap_free( conn->peek_msg_mem );
 420                 conn->peek_msg_mem = NULL;
 421                 conn->peek_msg = NULL;
 422             }
 423             /* check if we have enough data from the peek buffer */
 424             if (!(flags & MSG_WAITALL) || (*recvd == len)) return TRUE;
 425         }
 426         *recvd += pSSL_read( conn->ssl_conn, (char *)buf + *recvd, len - *recvd );
 427         if (flags & MSG_PEEK) /* must copy into buffer */
 428         {
 429             conn->peek_len = *recvd;
 430             if (!*recvd)
 431             {
 432                 heap_free( conn->peek_msg_mem );
 433                 conn->peek_msg_mem = NULL;
 434                 conn->peek_msg = NULL;
 435             }
 436             else memcpy( conn->peek_msg, buf, *recvd );
 437         }
 438         if (*recvd < 1 && len) return FALSE;
 439         return TRUE;
 440 #else
 441         return FALSE;
 442 #endif
 443     }
 444     if ((*recvd = recv( conn->socket, buf, len, flags )) == -1)
 445     {
 446         set_last_error( sock_get_error( errno ) );
 447         return FALSE;
 448     }
 449     return TRUE;
 450 }
 451
 452 BOOL netconn_query_data_available( netconn_t *conn, DWORD *available )
 453 {
 454 #ifdef FIONREAD
 455     int ret, unread;
 456 #endif
 457     *available = 0;
 458     if (!netconn_connected( conn )) return FALSE;
 459
 460     if (conn->secure)
 461     {
 462 #ifdef SONAME_LIBSSL
 463         if (conn->peek_msg) *available = conn->peek_len;
 464 #endif
 465         return TRUE;
 466     }
 467 #ifdef FIONREAD
 468     if (!(ret = ioctl( conn->socket, FIONREAD, &unread )))
 469     {
 470         TRACE("%d bytes of queued, but unread data\n", unread);
 471         *available += unread;
 472     }
 473 #endif
 474     return TRUE;
 475 }
 476
 477 BOOL netconn_get_next_line( netconn_t *conn, char *buffer, DWORD *buflen )
 478 {
 479     struct pollfd pfd;
 480     BOOL ret = FALSE;
 481     DWORD recvd = 0;
 482
 483     if (!netconn_connected( conn )) return FALSE;
 484
 485     if (conn->secure)
 486     {
 487 #ifdef SONAME_LIBSSL
 488         long timeout;
 489
 490         timeout = pSSL_CTX_get_timeout( conn->ssl_ctx );
 491         pSSL_CTX_set_timeout( conn->ssl_ctx, DEFAULT_RECEIVE_TIMEOUT );
 492
 493         while (recvd < *buflen)
 494         {
 495             int dummy;
 496             if (!netconn_recv( conn, &buffer[recvd], 1, 0, &dummy ))
 497             {
 498                 set_last_error( ERROR_CONNECTION_ABORTED );
 499                 break;
 500             }
 501             if (buffer[recvd] == '\n')
 502             {
 503                 ret = TRUE;
 504                 break;
 505             }
 506             if (buffer[recvd] != '\r') recvd++;
 507         }
 508         pSSL_CTX_set_timeout( conn->ssl_ctx, timeout );
 509         if (ret)
 510         {
 511             buffer[recvd++] = 0;
 512             *buflen = recvd;
 513             TRACE("received line %s\n", debugstr_a(buffer));
 514         }
 515         return ret;
 516 #else
 517         return FALSE;
 518 #endif
 519     }
 520
 521     pfd.fd = conn->socket;
 522     pfd.events = POLLIN;
 523     while (recvd < *buflen)
 524     {
 525         if (poll( &pfd, 1, DEFAULT_RECEIVE_TIMEOUT * 1000 ) > 0)
 526         {
 527             int res;
 528             if ((res = recv( conn->socket, &buffer[recvd], 1, 0 )) <= 0)
 529             {
 530                 if (res == -1) set_last_error( sock_get_error( errno ) );
 531                 break;
 532             }
 533             if (buffer[recvd] == '\n')
 534             {
 535                 ret = TRUE;
 536                 break;
 537             }
 538             if (buffer[recvd] != '\r') recvd++;
 539         }
 540         else
 541         {
 542             set_last_error( ERROR_WINHTTP_TIMEOUT );
 543             break;
 544         }
 545     }
 546     if (ret)
 547     {
 548         buffer[recvd++] = 0;
 549         *buflen = recvd;
 550         TRACE("received line %s\n", debugstr_a(buffer));
 551     }
 552     return ret;
 553 }
 554
 555 DWORD netconn_set_timeout( netconn_t *netconn, BOOL send, int value )
 556 {
 557     int res;
 558     struct timeval tv;
 559
 560     /* value is in milliseconds, convert to struct timeval */
 561     tv.tv_sec = value / 1000;
 562     tv.tv_usec = (value % 1000) * 1000;
 563
 564     if ((res = setsockopt( netconn->socket, SOL_SOCKET, send ? SO_SNDTIMEO : SO_RCVTIMEO, &tv, sizeof(tv) ) == -1))
 565     {
 566         WARN("setsockopt failed (%s)\n", strerror( errno ));
 567         return sock_get_error( errno );
 568     }
 569     return ERROR_SUCCESS;
 570 }
 571
 572 BOOL netconn_resolve( WCHAR *hostnameW, INTERNET_PORT port, struct sockaddr_in *sa )
 573 {
 574     char *hostname;
 575 #ifdef HAVE_GETADDRINFO
 576     struct addrinfo *res, hints;
 577     int ret;
 578 #else
 579     struct hostent *he;
 580 #endif
 581
 582     if (!(hostname = strdupWA( hostnameW ))) return FALSE;
 583
 584 #ifdef HAVE_GETADDRINFO
 585     memset( &hints, 0, sizeof(struct addrinfo) );
 586     hints.ai_family = AF_INET;
 587
 588     ret = getaddrinfo( hostname, NULL, &hints, &res );
 589     heap_free( hostname );
 590     if (ret != 0)
 591     {
 592         TRACE("failed to get address of %s (%s)\n", debugstr_a(hostname), gai_strerror(ret));
 593         return FALSE;
 594     }
 595     memset( sa, 0, sizeof(struct sockaddr_in) );
 596     memcpy( &sa->sin_addr, &((struct sockaddr_in *)res->ai_addr)->sin_addr, sizeof(struct in_addr) );
 597     sa->sin_family = res->ai_family;
 598     sa->sin_port = htons( port );
 599
 600     freeaddrinfo( res );
 601 #else
 602     EnterCriticalSection( &cs_gethostbyname );
 603
 604     he = gethostbyname( hostname );
 605     heap_free( hostname );
 606     if (!he)
 607     {
 608         TRACE("failed to get address of %s (%d)\n", debugstr_a(hostname), h_errno);
 609         LeaveCriticalSection( &cs_gethostbyname );
 610         return FALSE;
 611     }
 612     memset( sa, 0, sizeof(struct sockaddr_in) );
 613     memcpy( (char *)&sa->sin_addr, he->h_addr, he->h_length );
 614     sa->sin_family = he->h_addrtype;
 615     sa->sin_port = htons( port );
 616
 617     LeaveCriticalSection( &cs_gethostbyname );
 618 #endif
 619     return TRUE;
 620 }