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 #include "wincrypt.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 #ifdef SONAME_LIBSSL
  76
  77 #include <openssl/err.h>
  78
  79 static CRITICAL_SECTION init_ssl_cs;
  80 static CRITICAL_SECTION_DEBUG init_ssl_cs_debug =
  81 {
  82     0, 0, &init_ssl_cs,
  83     { &init_ssl_cs_debug.ProcessLocksList,
  84       &init_ssl_cs_debug.ProcessLocksList },
  85     0, 0, { (DWORD_PTR)(__FILE__ ": init_ssl_cs") }
  86 };
  87 static CRITICAL_SECTION init_ssl_cs = { &init_ssl_cs_debug, -1, 0, 0, 0, 0 };
  88
  89 static void *libssl_handle;
  90 static void *libcrypto_handle;
  91
  92 static SSL_METHOD *method;
  93 static SSL_CTX *ctx;
  94
  95 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  96
  97 MAKE_FUNCPTR( SSL_library_init );
  98 MAKE_FUNCPTR( SSL_load_error_strings );
  99 MAKE_FUNCPTR( SSLv23_method );
 100 MAKE_FUNCPTR( SSL_CTX_new );
 101 MAKE_FUNCPTR( SSL_new );
 102 MAKE_FUNCPTR( SSL_free );
 103 MAKE_FUNCPTR( SSL_set_fd );
 104 MAKE_FUNCPTR( SSL_connect );
 105 MAKE_FUNCPTR( SSL_shutdown );
 106 MAKE_FUNCPTR( SSL_write );
 107 MAKE_FUNCPTR( SSL_read );
 108 MAKE_FUNCPTR( SSL_get_verify_result );
 109 MAKE_FUNCPTR( SSL_get_peer_certificate );
 110 MAKE_FUNCPTR( SSL_CTX_set_default_verify_paths );
 111
 112 MAKE_FUNCPTR( BIO_new_fp );
 113 MAKE_FUNCPTR( ERR_get_error );
 114 MAKE_FUNCPTR( ERR_error_string );
 115 MAKE_FUNCPTR( i2d_X509 );
 116 #undef MAKE_FUNCPTR
 117
 118 #endif
 119
 120 /* translate a unix error code into a winsock error code */
 121 static int sock_get_error( int err )
 122 {
 123 #if !defined(__MINGW32__) && !defined (_MSC_VER)
 124     switch (err)
 125     {
 126         case EINTR:             return WSAEINTR;
 127         case EBADF:             return WSAEBADF;
 128         case EPERM:
 129         case EACCES:            return WSAEACCES;
 130         case EFAULT:            return WSAEFAULT;
 131         case EINVAL:            return WSAEINVAL;
 132         case EMFILE:            return WSAEMFILE;
 133         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 134         case EINPROGRESS:       return WSAEINPROGRESS;
 135         case EALREADY:          return WSAEALREADY;
 136         case ENOTSOCK:          return WSAENOTSOCK;
 137         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 138         case EMSGSIZE:          return WSAEMSGSIZE;
 139         case EPROTOTYPE:        return WSAEPROTOTYPE;
 140         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 141         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 142         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 143         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 144         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 145         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 146         case EADDRINUSE:        return WSAEADDRINUSE;
 147         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 148         case ENETDOWN:          return WSAENETDOWN;
 149         case ENETUNREACH:       return WSAENETUNREACH;
 150         case ENETRESET:         return WSAENETRESET;
 151         case ECONNABORTED:      return WSAECONNABORTED;
 152         case EPIPE:
 153         case ECONNRESET:        return WSAECONNRESET;
 154         case ENOBUFS:           return WSAENOBUFS;
 155         case EISCONN:           return WSAEISCONN;
 156         case ENOTCONN:          return WSAENOTCONN;
 157         case ESHUTDOWN:         return WSAESHUTDOWN;
 158         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 159         case ETIMEDOUT:         return WSAETIMEDOUT;
 160         case ECONNREFUSED:      return WSAECONNREFUSED;
 161         case ELOOP:             return WSAELOOP;
 162         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 163         case EHOSTDOWN:         return WSAEHOSTDOWN;
 164         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 165         case ENOTEMPTY:         return WSAENOTEMPTY;
 166 #ifdef EPROCLIM
 167         case EPROCLIM:          return WSAEPROCLIM;
 168 #endif
 169 #ifdef EUSERS
 170         case EUSERS:            return WSAEUSERS;
 171 #endif
 172 #ifdef EDQUOT
 173         case EDQUOT:            return WSAEDQUOT;
 174 #endif
 175 #ifdef ESTALE
 176         case ESTALE:            return WSAESTALE;
 177 #endif
 178 #ifdef EREMOTE
 179         case EREMOTE:           return WSAEREMOTE;
 180 #endif
 181     default: errno = err; perror( "sock_set_error" ); return WSAEFAULT;
 182     }
 183 #endif
 184     return err;
 185 }
 186
 187 BOOL netconn_init( netconn_t *conn, BOOL secure )
 188 {
 189     conn->socket = -1;
 190     if (!secure) return TRUE;
 191
 192 #if defined(SONAME_LIBSSL) && defined(SONAME_LIBCRYPTO)
 193     EnterCriticalSection( &init_ssl_cs );
 194     if (libssl_handle)
 195     {
 196         LeaveCriticalSection( &init_ssl_cs );
 197         return TRUE;
 198     }
 199     if (!(libssl_handle = wine_dlopen( SONAME_LIBSSL, RTLD_NOW, NULL, 0 )))
 200     {
 201         ERR("Trying to use SSL but couldn't load %s. Expect trouble.\n", SONAME_LIBSSL);
 202         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 203         LeaveCriticalSection( &init_ssl_cs );
 204         return FALSE;
 205     }
 206     if (!(libcrypto_handle = wine_dlopen( SONAME_LIBCRYPTO, RTLD_NOW, NULL, 0 )))
 207     {
 208         ERR("Trying to use SSL but couldn't load %s. Expect trouble.\n", SONAME_LIBCRYPTO);
 209         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 210         LeaveCriticalSection( &init_ssl_cs );
 211         return FALSE;
 212     }
 213 #define LOAD_FUNCPTR(x) \
 214     if (!(p##x = wine_dlsym( libssl_handle, #x, NULL, 0 ))) \
 215     { \
 216         ERR("Failed to load symbol %s\n", #x); \
 217         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR ); \
 218         LeaveCriticalSection( &init_ssl_cs ); \
 219         return FALSE; \
 220     }
 221     LOAD_FUNCPTR( SSL_library_init );
 222     LOAD_FUNCPTR( SSL_load_error_strings );
 223     LOAD_FUNCPTR( SSLv23_method );
 224     LOAD_FUNCPTR( SSL_CTX_new );
 225     LOAD_FUNCPTR( SSL_new );
 226     LOAD_FUNCPTR( SSL_free );
 227     LOAD_FUNCPTR( SSL_set_fd );
 228     LOAD_FUNCPTR( SSL_connect );
 229     LOAD_FUNCPTR( SSL_shutdown );
 230     LOAD_FUNCPTR( SSL_write );
 231     LOAD_FUNCPTR( SSL_read );
 232     LOAD_FUNCPTR( SSL_get_verify_result );
 233     LOAD_FUNCPTR( SSL_get_peer_certificate );
 234     LOAD_FUNCPTR( SSL_CTX_set_default_verify_paths );
 235 #undef LOAD_FUNCPTR
 236
 237 #define LOAD_FUNCPTR(x) \
 238     if (!(p##x = wine_dlsym( libcrypto_handle, #x, NULL, 0 ))) \
 239     { \
 240         ERR("Failed to load symbol %s\n", #x); \
 241         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR ); \
 242         LeaveCriticalSection( &init_ssl_cs ); \
 243         return FALSE; \
 244     }
 245     LOAD_FUNCPTR( BIO_new_fp );
 246     LOAD_FUNCPTR( ERR_get_error );
 247     LOAD_FUNCPTR( ERR_error_string );
 248     LOAD_FUNCPTR( i2d_X509 );
 249 #undef LOAD_FUNCPTR
 250
 251     pSSL_library_init();
 252     pSSL_load_error_strings();
 253     pBIO_new_fp( stderr, BIO_NOCLOSE );
 254
 255     method = pSSLv23_method();
 256     ctx = pSSL_CTX_new( method );
 257     if (!pSSL_CTX_set_default_verify_paths( ctx ))
 258     {
 259         ERR("SSL_CTX_set_default_verify_paths failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 260         set_last_error( ERROR_OUTOFMEMORY );
 261         LeaveCriticalSection( &init_ssl_cs );
 262         return FALSE;
 263     }
 264     LeaveCriticalSection( &init_ssl_cs );
 265 #else
 266     WARN("SSL support not compiled in.\n");
 267     set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 268     return FALSE;
 269 #endif
 270     return TRUE;
 271 }
 272
 273 BOOL netconn_connected( netconn_t *conn )
 274 {
 275     return (conn->socket != -1);
 276 }
 277
 278 BOOL netconn_create( netconn_t *conn, int domain, int type, int protocol )
 279 {
 280     if ((conn->socket = socket( domain, type, protocol )) == -1)
 281     {
 282         WARN("unable to create socket (%s)\n", strerror(errno));
 283         set_last_error( sock_get_error( errno ) );
 284         return FALSE;
 285     }
 286     return TRUE;
 287 }
 288
 289 BOOL netconn_close( netconn_t *conn )
 290 {
 291     int res;
 292
 293 #ifdef SONAME_LIBSSL
 294     if (conn->secure)
 295     {
 296         heap_free( conn->peek_msg_mem );
 297         conn->peek_msg_mem = NULL;
 298         conn->peek_msg = NULL;
 299         conn->peek_len = 0;
 300
 301         pSSL_shutdown( conn->ssl_conn );
 302         pSSL_free( conn->ssl_conn );
 303
 304         conn->ssl_conn = NULL;
 305         conn->secure = FALSE;
 306     }
 307 #endif
 308     res = closesocket( conn->socket );
 309     conn->socket = -1;
 310     if (res == -1)
 311     {
 312         set_last_error( sock_get_error( errno ) );
 313         return FALSE;
 314     }
 315     return TRUE;
 316 }
 317
 318 BOOL netconn_connect( netconn_t *conn, const struct sockaddr *sockaddr, unsigned int addr_len, int timeout )
 319 {
 320     BOOL ret = FALSE;
 321     int res = 0, state;
 322
 323     if (timeout > 0)
 324     {
 325         state = 1;
 326         ioctlsocket( conn->socket, FIONBIO, &state );
 327     }
 328     if (connect( conn->socket, sockaddr, addr_len ) < 0)
 329     {
 330         res = sock_get_error( errno );
 331         if (res == WSAEWOULDBLOCK || res == WSAEINPROGRESS)
 332         {
 333             struct pollfd pfd;
 334
 335             pfd.fd = conn->socket;
 336             pfd.events = POLLOUT;
 337             if (poll( &pfd, 1, timeout ) > 0)
 338                 ret = TRUE;
 339             else
 340                 res = sock_get_error( errno );
 341         }
 342     }
 343     else
 344         ret = TRUE;
 345     if (timeout > 0)
 346     {
 347         state = 0;
 348         ioctlsocket( conn->socket, FIONBIO, &state );
 349     }
 350     if (!ret)
 351     {
 352         WARN("unable to connect to host (%d)\n", res);
 353         set_last_error( res );
 354     }
 355     return ret;
 356 }
 357
 358 BOOL netconn_secure_connect( netconn_t *conn )
 359 {
 360 #ifdef SONAME_LIBSSL
 361     X509 *cert;
 362     long res;
 363
 364     if (!(conn->ssl_conn = pSSL_new( ctx )))
 365     {
 366         ERR("SSL_new failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 367         set_last_error( ERROR_OUTOFMEMORY );
 368         goto fail;
 369     }
 370     if (!pSSL_set_fd( conn->ssl_conn, conn->socket ))
 371     {
 372         ERR("SSL_set_fd failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 373         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 374         goto fail;
 375     }
 376     if (pSSL_connect( conn->ssl_conn ) <= 0)
 377     {
 378         ERR("SSL_connect failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 379         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 380         goto fail;
 381     }
 382     if (!(cert = pSSL_get_peer_certificate( conn->ssl_conn )))
 383     {
 384         ERR("No certificate for server: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 385         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 386         goto fail;
 387     }
 388     if ((res = pSSL_get_verify_result( conn->ssl_conn )) != X509_V_OK)
 389     {
 390         /* FIXME: we should set an error and return, but we only print an error at the moment */
 391         ERR("couldn't verify server certificate (%ld)\n", res);
 392     }
 393     TRACE("established SSL connection\n");
 394     conn->secure = TRUE;
 395     return TRUE;
 396
 397 fail:
 398     if (conn->ssl_conn)
 399     {
 400         pSSL_shutdown( conn->ssl_conn );
 401         pSSL_free( conn->ssl_conn );
 402         conn->ssl_conn = NULL;
 403     }
 404 #endif
 405     return FALSE;
 406 }
 407
 408 BOOL netconn_send( netconn_t *conn, const void *msg, size_t len, int flags, int *sent )
 409 {
 410     if (!netconn_connected( conn )) return FALSE;
 411     if (conn->secure)
 412     {
 413 #ifdef SONAME_LIBSSL
 414         if (flags) FIXME("SSL_write doesn't support any flags (%08x)\n", flags);
 415         *sent = pSSL_write( conn->ssl_conn, msg, len );
 416         if (*sent < 1 && len) return FALSE;
 417         return TRUE;
 418 #else
 419         return FALSE;
 420 #endif
 421     }
 422     if ((*sent = send( conn->socket, msg, len, flags )) == -1)
 423     {
 424         set_last_error( sock_get_error( errno ) );
 425         return FALSE;
 426     }
 427     return TRUE;
 428 }
 429
 430 BOOL netconn_recv( netconn_t *conn, void *buf, size_t len, int flags, int *recvd )
 431 {
 432     *recvd = 0;
 433     if (!netconn_connected( conn )) return FALSE;
 434     if (!len) return TRUE;
 435
 436     if (conn->secure)
 437     {
 438 #ifdef SONAME_LIBSSL
 439         if (flags & ~(MSG_PEEK | MSG_WAITALL))
 440             FIXME("SSL_read does not support the following flags: %08x\n", flags);
 441
 442         /* this ugly hack is all for MSG_PEEK */
 443         if (flags & MSG_PEEK && !conn->peek_msg)
 444         {
 445             if (!(conn->peek_msg = conn->peek_msg_mem = heap_alloc( len + 1 ))) return FALSE;
 446         }
 447         else if (flags & MSG_PEEK && conn->peek_msg)
 448         {
 449             if (len < conn->peek_len) FIXME("buffer isn't big enough, should we wrap?\n");
 450             *recvd = min( len, conn->peek_len );
 451             memcpy( buf, conn->peek_msg, *recvd );
 452             return TRUE;
 453         }
 454         else if (conn->peek_msg)
 455         {
 456             *recvd = min( len, conn->peek_len );
 457             memcpy( buf, conn->peek_msg, *recvd );
 458             conn->peek_len -= *recvd;
 459             conn->peek_msg += *recvd;
 460
 461             if (conn->peek_len == 0)
 462             {
 463                 heap_free( conn->peek_msg_mem );
 464                 conn->peek_msg_mem = NULL;
 465                 conn->peek_msg = NULL;
 466             }
 467             /* check if we have enough data from the peek buffer */
 468             if (!(flags & MSG_WAITALL) || (*recvd == len)) return TRUE;
 469         }
 470         *recvd += pSSL_read( conn->ssl_conn, (char *)buf + *recvd, len - *recvd );
 471         if (flags & MSG_PEEK) /* must copy into buffer */
 472         {
 473             conn->peek_len = *recvd;
 474             if (!*recvd)
 475             {
 476                 heap_free( conn->peek_msg_mem );
 477                 conn->peek_msg_mem = NULL;
 478                 conn->peek_msg = NULL;
 479             }
 480             else memcpy( conn->peek_msg, buf, *recvd );
 481         }
 482         if (*recvd < 1 && len) return FALSE;
 483         return TRUE;
 484 #else
 485         return FALSE;
 486 #endif
 487     }
 488     if ((*recvd = recv( conn->socket, buf, len, flags )) == -1)
 489     {
 490         set_last_error( sock_get_error( errno ) );
 491         return FALSE;
 492     }
 493     return TRUE;
 494 }
 495
 496 BOOL netconn_query_data_available( netconn_t *conn, DWORD *available )
 497 {
 498 #ifdef FIONREAD
 499     int ret, unread;
 500 #endif
 501     *available = 0;
 502     if (!netconn_connected( conn )) return FALSE;
 503
 504     if (conn->secure)
 505     {
 506 #ifdef SONAME_LIBSSL
 507         if (conn->peek_msg) *available = conn->peek_len;
 508 #endif
 509         return TRUE;
 510     }
 511 #ifdef FIONREAD
 512     if (!(ret = ioctlsocket( conn->socket, FIONREAD, &unread ))) *available = unread;
 513 #endif
 514     return TRUE;
 515 }
 516
 517 BOOL netconn_get_next_line( netconn_t *conn, char *buffer, DWORD *buflen )
 518 {
 519     struct pollfd pfd;
 520     BOOL ret = FALSE;
 521     DWORD recvd = 0;
 522
 523     if (!netconn_connected( conn )) return FALSE;
 524
 525     if (conn->secure)
 526     {
 527 #ifdef SONAME_LIBSSL
 528         while (recvd < *buflen)
 529         {
 530             int dummy;
 531             if (!netconn_recv( conn, &buffer[recvd], 1, 0, &dummy ))
 532             {
 533                 set_last_error( ERROR_CONNECTION_ABORTED );
 534                 break;
 535             }
 536             if (buffer[recvd] == '\n')
 537             {
 538                 ret = TRUE;
 539                 break;
 540             }
 541             if (buffer[recvd] != '\r') recvd++;
 542         }
 543         if (ret)
 544         {
 545             buffer[recvd++] = 0;
 546             *buflen = recvd;
 547             TRACE("received line %s\n", debugstr_a(buffer));
 548         }
 549         return ret;
 550 #else
 551         return FALSE;
 552 #endif
 553     }
 554
 555     pfd.fd = conn->socket;
 556     pfd.events = POLLIN;
 557     while (recvd < *buflen)
 558     {
 559         int timeout, res;
 560         struct timeval tv;
 561         socklen_t len = sizeof(tv);
 562
 563         if ((res = getsockopt( conn->socket, SOL_SOCKET, SO_RCVTIMEO, (void*)&tv, &len ) != -1))
 564             timeout = tv.tv_sec * 1000 + tv.tv_usec / 1000;
 565         else
 566             timeout = -1;
 567         if (poll( &pfd, 1, timeout ) > 0)
 568         {
 569             if ((res = recv( conn->socket, &buffer[recvd], 1, 0 )) <= 0)
 570             {
 571                 if (res == -1) set_last_error( sock_get_error( errno ) );
 572                 break;
 573             }
 574             if (buffer[recvd] == '\n')
 575             {
 576                 ret = TRUE;
 577                 break;
 578             }
 579             if (buffer[recvd] != '\r') recvd++;
 580         }
 581         else
 582         {
 583             set_last_error( ERROR_WINHTTP_TIMEOUT );
 584             break;
 585         }
 586     }
 587     if (ret)
 588     {
 589         buffer[recvd++] = 0;
 590         *buflen = recvd;
 591         TRACE("received line %s\n", debugstr_a(buffer));
 592     }
 593     return ret;
 594 }
 595
 596 DWORD netconn_set_timeout( netconn_t *netconn, BOOL send, int value )
 597 {
 598     int res;
 599     struct timeval tv;
 600
 601     /* value is in milliseconds, convert to struct timeval */
 602     tv.tv_sec = value / 1000;
 603     tv.tv_usec = (value % 1000) * 1000;
 604
 605     if ((res = setsockopt( netconn->socket, SOL_SOCKET, send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&tv, sizeof(tv) ) == -1))
 606     {
 607         WARN("setsockopt failed (%s)\n", strerror( errno ));
 608         return sock_get_error( errno );
 609     }
 610     return ERROR_SUCCESS;
 611 }
 612
 613 BOOL netconn_resolve( WCHAR *hostnameW, INTERNET_PORT port, struct sockaddr *sa, socklen_t *sa_len )
 614 {
 615     char *hostname;
 616 #ifdef HAVE_GETADDRINFO
 617     struct addrinfo *res, hints;
 618     int ret;
 619 #else
 620     struct hostent *he;
 621     struct sockaddr_in *sin = (struct sockaddr_in *)sa;
 622 #endif
 623
 624     if (!(hostname = strdupWA( hostnameW ))) return FALSE;
 625
 626 #ifdef HAVE_GETADDRINFO
 627     memset( &hints, 0, sizeof(struct addrinfo) );
 628     /* Prefer IPv4 to IPv6 addresses, since some web servers do not listen on
 629      * their IPv6 addresses even though they have IPv6 addresses in the DNS.
 630      */
 631     hints.ai_family = AF_INET;
 632
 633     ret = getaddrinfo( hostname, NULL, &hints, &res );
 634     if (ret != 0)
 635     {
 636         TRACE("failed to get IPv4 address of %s (%s), retrying with IPv6\n", debugstr_w(hostnameW), gai_strerror(ret));
 637         hints.ai_family = AF_INET6;
 638         ret = getaddrinfo( hostname, NULL, &hints, &res );
 639         if (ret != 0)
 640         {
 641             TRACE("failed to get address of %s (%s)\n", debugstr_w(hostnameW), gai_strerror(ret));
 642             heap_free( hostname );
 643             return FALSE;
 644         }
 645     }
 646     heap_free( hostname );
 647     if (*sa_len < res->ai_addrlen)
 648     {
 649         WARN("address too small\n");
 650         freeaddrinfo( res );
 651         return FALSE;
 652     }
 653     *sa_len = res->ai_addrlen;
 654     memcpy( sa, res->ai_addr, res->ai_addrlen );
 655     /* Copy port */
 656     switch (res->ai_family)
 657     {
 658     case AF_INET:
 659         ((struct sockaddr_in *)sa)->sin_port = htons( port );
 660         break;
 661     case AF_INET6:
 662         ((struct sockaddr_in6 *)sa)->sin6_port = htons( port );
 663         break;
 664     }
 665
 666     freeaddrinfo( res );
 667     return TRUE;
 668 #else
 669     EnterCriticalSection( &cs_gethostbyname );
 670
 671     he = gethostbyname( hostname );
 672     heap_free( hostname );
 673     if (!he)
 674     {
 675         TRACE("failed to get address of %s (%d)\n", debugstr_w(hostnameW), h_errno);
 676         LeaveCriticalSection( &cs_gethostbyname );
 677         return FALSE;
 678     }
 679     if (*sa_len < sizeof(struct sockaddr_in))
 680     {
 681         WARN("address too small\n");
 682         LeaveCriticalSection( &cs_gethostbyname );
 683         return FALSE;
 684     }
 685     *sa_len = sizeof(struct sockaddr_in);
 686     memset( sa, 0, sizeof(struct sockaddr_in) );
 687     memcpy( &sin->sin_addr, he->h_addr, he->h_length );
 688     sin->sin_family = he->h_addrtype;
 689     sin->sin_port = htons( port );
 690
 691     LeaveCriticalSection( &cs_gethostbyname );
 692     return TRUE;
 693 #endif
 694 }
 695
 696 const void *netconn_get_certificate( netconn_t *conn )
 697 {
 698 #ifdef SONAME_LIBSSL
 699     X509 *cert;
 700     unsigned char *buffer, *p;
 701     int len;
 702     BOOL malloc = FALSE;
 703     const CERT_CONTEXT *ret;
 704
 705     if (!conn->secure) return NULL;
 706
 707     if (!(cert = pSSL_get_peer_certificate( conn->ssl_conn ))) return NULL;
 708     p = NULL;
 709     if ((len = pi2d_X509( cert, &p )) < 0) return NULL;
 710     /*
 711      * SSL 0.9.7 and above malloc the buffer if it is null.
 712      * however earlier version do not and so we would need to alloc the buffer.
 713      *
 714      * see the i2d_X509 man page for more details.
 715      */
 716     if (!p)
 717     {
 718         if (!(buffer = heap_alloc( len ))) return NULL;
 719         p = buffer;
 720         len = pi2d_X509( cert, &p );
 721     }
 722     else
 723     {
 724         buffer = p;
 725         malloc = TRUE;
 726     }
 727
 728     ret = CertCreateCertificateContext( X509_ASN_ENCODING, buffer, len );
 729
 730     if (malloc) free( buffer );
 731     else heap_free( buffer );
 732
 733     return ret;
 734 #else
 735     return NULL;
 736 #endif
 737 }