src/inetfile/chttpget.cpp

   1 /*
   2  * Copyright (C) Volition, Inc. 1999.  All rights reserved.
   3  *
   4  * All source code herein is the property of Volition, Inc. You may not sell
   5  * or otherwise commercially exploit the source or things you created based on
   6  * the source.
   7  */
   8
   9 /*
  10 * $Logfile: /Freespace2/code/Inetfile/Chttpget.cpp $
  11 * $Revision$
  12 * $Date$
  13 * $Author$
  14 *
  15 * HTTP Client class (get only)
  16 *
  17 * $Log$
  18 * Revision 1.8  2002/06/21 03:04:12  relnev
  19 * nothing important
  20 *
  21 * Revision 1.7  2002/06/17 06:33:09  relnev
  22 * ryan's struct patch for gcc 2.95
  23 *
  24 * Revision 1.6  2002/06/09 04:41:21  relnev
  25 * added copyright header
  26 *
  27 * Revision 1.5  2002/06/02 04:26:34  relnev
  28 * warning cleanup
  29 *
  30 * Revision 1.4  2002/05/26 20:32:24  theoddone33
  31 * Fix some minor stuff
  32 *
  33 * Revision 1.3  2002/05/26 20:20:54  relnev
  34 * unix.h: updated
  35 *
  36 * inetfile/: complete
  37 *
  38 * Revision 1.2  2002/05/07 03:16:45  theoddone33
  39 * The Great Newline Fix
  40 *
  41 * Revision 1.1.1.1  2002/05/03 03:28:09  root
  42 * Initial import.
  43 *
  44  *
  45  * 5     8/24/99 1:49a Dave
  46  * Fixed client-side afterburner stuttering. Added checkbox for no version
  47  * checking on PXO join. Made button info passing more friendly between
  48  * client and server.
  49  *
  50  * 4     8/22/99 1:19p Dave
  51  * Fixed up http proxy code. Cleaned up scoring code. Reverse the order in
  52  * which d3d cards are detected.
  53  *
  54  * 21    8/21/99 6:33p Kevin
  55  * Fixed Proxy Stuff
  56  *
  57  * 20    8/21/99 6:48a Jeff
  58  * Linux port
  59  *
  60  * 19    8/20/99 3:01p Kevin
  61  * Added support for Proxies (I hope!)
  62  *
  63  * 18    8/15/99 6:38p Jeff
  64  * fixed compile error
  65  *
  66  * 17    8/15/99 6:26p Kevin
  67  *
  68  * 16    4/14/99 1:20a Jeff
  69  * fixed case mismatched #includes
  70  *
  71  * 15    3/03/99 12:28a Nate
  72  * sped up something or other when the connection is done
  73  *
  74  * 14    2/03/99 4:20p Kevin
  75  * Got multiplayer working with .mn3 files, and setup autodownloading
  76  *
  77  * 13    1/27/99 5:49p Kevin
  78  *
  79  * 12    1/27/99 5:38p Kevin
  80  *
  81  * 11    12/30/98 12:15p Kevin
  82  * Auto Mission Download system
  83  *
  84  * 10    10/12/98 4:59p Kevin
  85  * Added delay to thread when cancelled...
  86  *
  87  * 9     10/12/98 4:49p Nate
  88  * More fixes
  89  *
  90  * 8     10/12/98 1:54p Nate
  91  * Fixed bug
  92  *
  93  * 7     10/12/98 11:30a Kevin
  94  * More memory stuff
  95  *
  96  * 6     10/08/98 12:59p Nate
  97  * fixed cancel
  98  *
  99  * 5     10/08/98 9:57a Kevin
 100  * made transfer cancellable
 101  *
 102  * 4     7/31/98 12:19p Nate
 103  * Fixed http abort problem.
 104  *
 105  * 3     7/31/98 11:57a Kevin
 106  * Added new functions for getting state
 107  *
 108  * 2     6/01/98 10:10a Kevin
 109  * Added DLL connection interface and auto update DLL
 110  *
 111  * 1     5/27/98 9:52a Kevin
 112  *
 113  * 1     5/25/98 5:31p Kevin
 114  * Initial version
 115 *
 116 * $NoKeywords: $
 117 */
 118
 119
 120 #ifndef PLAT_UNIX
 121 #include <windows.h>
 122 #include <process.h>
 123 #else
 124 #include <sys/types.h>
 125 #include <sys/socket.h>
 126 #include <netinet/in.h>
 127 #include <arpa/inet.h>
 128 #include <netdb.h>
 129 #include <sys/ioctl.h>
 130 #include <errno.h>
 131 #include <sys/time.h>
 132 #include <unistd.h>
 133 #endif
 134
 135 #include <string.h>
 136 #include <stdio.h>
 137 #include <stdlib.h>
 138 #include <ctype.h>
 139
 140 #include "pstypes.h"
 141 #include "inetgetfile.h"
 142 #include "chttpget.h"
 143
 144
 145
 146 #define NW_AGHBN_CANCEL         1
 147 #define NW_AGHBN_LOOKUP         2
 148 #define NW_AGHBN_READ           3
 149
 150 int http_gethostbynameworker(void *parm);
 151
 152
 153 int http_Asyncgethostbyname(unsigned int *ip,int command, char *hostname);
 154
 155 int HTTPObjThread( void * obj )
 156 {
 157         ((ChttpGet *)obj)->WorkerThread();
 158         ((ChttpGet *)obj)->m_Aborted = true;
 159
 160         return ((ChttpGet *)obj)->GetStatus();
 161 }
 162
 163 void ChttpGet::AbortGet()
 164 {
 165         m_Aborting = true;
 166         while(!m_Aborted) SDL_Delay(10); //Wait for the thread to end
 167 }
 168
 169 ChttpGet::ChttpGet(char *URL,char *localfile,char *proxyip,unsigned short proxyport)
 170 {
 171         m_ProxyEnabled = true;
 172         m_ProxyIP = proxyip;
 173         m_ProxyPort = proxyport;
 174         GetFile(URL,localfile);
 175 }
 176
 177 ChttpGet::ChttpGet(char *URL,char *localfile)
 178 {
 179         m_ProxyEnabled = false;
 180         GetFile(URL,localfile);
 181 }
 182
 183
 184 void ChttpGet::GetFile(char *URL,char *localfile)
 185 {
 186         m_DataSock = INVALID_SOCKET;
 187         m_iBytesIn = 0;
 188         m_iBytesTotal = 0;
 189         m_State = HTTP_STATE_STARTUP;;
 190         m_Aborting = false;
 191         m_Aborted = false;
 192
 193         SDL_strlcpy(m_URL, URL, sizeof(m_URL));
 194
 195         LOCALFILE = fopen(localfile,"wb");
 196         if(NULL == LOCALFILE)
 197         {
 198                 m_State = HTTP_STATE_CANT_WRITE_FILE;
 199                 m_Aborted = true;
 200                 return;
 201         }
 202         m_DataSock = socket(AF_INET, SOCK_STREAM, 0);
 203         if(INVALID_SOCKET == m_DataSock)
 204         {
 205                 m_State = HTTP_STATE_SOCKET_ERROR;
 206                 m_Aborted = true;
 207                 return;
 208         }
 209         unsigned long arg;
 210
 211         arg = true;
 212
 213         ioctlsocket( m_DataSock, FIONBIO, &arg );
 214
 215         char *pURL = URL;
 216         if(SDL_strncasecmp(URL,"http:",5)==0)
 217         {
 218                 pURL +=5;
 219                 while(*pURL == '/')
 220                 {
 221                         pURL++;
 222                 }
 223         }
 224         //There shouldn't be any : in this string
 225         if(SDL_strchr(pURL,':'))
 226         {
 227                 m_State = HTTP_STATE_URL_PARSING_ERROR;
 228                 m_Aborted = true;
 229                 return;
 230         }
 231         //read the filename by searching backwards for a /
 232         //then keep reading until you find the first /
 233         //when you found it, you have the host and dir
 234         char *filestart = NULL;
 235         char *dirstart = NULL;
 236         for(int i = strlen(pURL);i>=0;i--)
 237         {
 238                 if(pURL[i]== '/')
 239                 {
 240                         if(!filestart)
 241                         {
 242                                 filestart = pURL+i+1;
 243                                 dirstart = pURL+i+1;
 244                                 SDL_strlcpy(m_szFilename, filestart, sizeof(m_szFilename));
 245                         }
 246                         else
 247                         {
 248                                 dirstart = pURL+i+1;
 249                         }
 250                 }
 251         }
 252         if((dirstart==NULL) || (filestart==NULL))
 253         {
 254                 m_State = HTTP_STATE_URL_PARSING_ERROR;
 255                 m_Aborted = true;
 256                 return;
 257         }
 258         else
 259         {
 260                 SDL_strlcpy(m_szDir, dirstart, sizeof(m_szDir));//,(filestart-dirstart));
 261                 int len = min((dirstart-pURL), (int)sizeof(m_szHost));
 262                 SDL_strlcpy(m_szHost, pURL, len);
 263         }
 264
 265         SDL_Thread *thread = SDL_CreateThread(HTTPObjThread, "HTTPObjThread", this);
 266
 267         if(thread == NULL)
 268         {
 269                 m_State = HTTP_STATE_INTERNAL_ERROR;
 270                 m_Aborted = true;
 271                 return;
 272         }
 273         else
 274         {
 275                 int ret_val = 0;
 276                 SDL_WaitThread(thread, &ret_val);
 277         }
 278 }
 279
 280
 281 ChttpGet::~ChttpGet()
 282 {
 283         if(m_DataSock != INVALID_SOCKET)
 284         {
 285                 shutdown(m_DataSock,2);
 286                 closesocket(m_DataSock);
 287         }
 288
 289         if(LOCALFILE != NULL)
 290         {
 291                 fclose(LOCALFILE);
 292         }
 293 }
 294
 295 int ChttpGet::GetStatus()
 296 {
 297         return m_State;
 298 }
 299
 300 unsigned int ChttpGet::GetBytesIn()
 301 {
 302         return m_iBytesIn;
 303 }
 304
 305 unsigned int ChttpGet::GetTotalBytes()
 306 {
 307         return m_iBytesTotal;
 308 }
 309
 310
 311 void ChttpGet::WorkerThread()
 312 {
 313         char szCommand[1000];
 314         char *p;
 315         int irsp = 0;
 316         ConnectSocket();
 317         if(m_Aborting)
 318         {
 319                 fclose(LOCALFILE);
 320                 LOCALFILE = NULL;
 321                 return;
 322         }
 323         if(m_State != HTTP_STATE_CONNECTED)
 324         {
 325                 fclose(LOCALFILE);
 326                 LOCALFILE = NULL;
 327                 return;
 328         }
 329         SDL_snprintf(szCommand,sizeof(szCommand),"GET %s%s HTTP/1.1\nAccept: */*\nAccept-Encoding: deflate\nHost: %s\n\n\n",m_ProxyEnabled?"":"/",m_ProxyEnabled?m_URL:m_szDir,m_szHost);
 330         send(m_DataSock,szCommand,strlen(szCommand),0);
 331         p = GetHTTPLine();
 332         if(SDL_strncasecmp("HTTP/",p,5)==0)
 333         {
 334                 char *pcode;
 335                 pcode = SDL_strchr(p,' ')+1;
 336                 if(!pcode)
 337                 {
 338                         m_State = HTTP_STATE_UNKNOWN_ERROR;
 339                         fclose(LOCALFILE);
 340                         LOCALFILE = NULL;
 341                         return;
 342
 343                 }
 344                 pcode[3] = '\0';
 345                 irsp = atoi(pcode);
 346
 347                 if(irsp == 0)
 348                 {
 349                         m_State = HTTP_STATE_UNKNOWN_ERROR;
 350                         fclose(LOCALFILE);
 351                         LOCALFILE = NULL;
 352                         return;
 353                 }
 354                 if(irsp==200)
 355                 {
 356                         int idataready=0;
 357                         do
 358                         {
 359                                 p = GetHTTPLine();
 360                                 if(p==NULL)
 361                                 {
 362                                         m_State = HTTP_STATE_UNKNOWN_ERROR;
 363                                         fclose(LOCALFILE);
 364                                         LOCALFILE = NULL;
 365                                         return;
 366                                 }
 367                                 if(*p=='\0')
 368                                 {
 369                                         idataready = 1;
 370                                         break;
 371                                 }
 372                                 if(SDL_strncasecmp(p,"Content-Length:",strlen("Content-Length:"))==0)
 373                                 {
 374                                         char *s = SDL_strchr(p,' ')+1;
 375                                         p = s;
 376                                         if(s)
 377                                         {
 378                                                 while(*s)
 379                                                 {
 380                                                         if(!isdigit(*s))
 381                                                         {
 382                                                                 *s='\0';
 383                                                         }
 384                                                         s++;
 385                                                 };
 386                                                 m_iBytesTotal = atoi(p);
 387                                         }
 388
 389                                 }
 390
 391                                 SDL_Delay(1);
 392                         }while(!idataready);
 393                 ReadDataChannel();
 394                 return;
 395                 }
 396                 m_State = HTTP_STATE_FILE_NOT_FOUND;
 397                 fclose(LOCALFILE);
 398                 LOCALFILE = NULL;
 399                 return;
 400         }
 401         else
 402         {
 403                 m_State = HTTP_STATE_UNKNOWN_ERROR;
 404                 fclose(LOCALFILE);
 405                 LOCALFILE = NULL;
 406                 return;
 407         }
 408 }
 409
 410 int ChttpGet::ConnectSocket()
 411 {
 412         unsigned int ip;
 413         struct servent *se;
 414         struct sockaddr_in hostaddr;
 415         if(m_Aborting){
 416                 return 0;
 417         }
 418
 419         ip = inet_addr((const char *)m_szHost);
 420
 421         int rcode = 0;
 422         if(ip==INADDR_NONE)
 423         {
 424                 http_Asyncgethostbyname(&ip,NW_AGHBN_LOOKUP,m_szHost);
 425                 do
 426                 {
 427                         if(m_Aborting)
 428                         {
 429                                 http_Asyncgethostbyname(&ip,NW_AGHBN_CANCEL,m_szHost);
 430                                 return 0;
 431                         }
 432                         rcode = http_Asyncgethostbyname(&ip,NW_AGHBN_READ,m_szHost);
 433
 434                         SDL_Delay(1);
 435                 }while(rcode==0);
 436         }
 437
 438         if(rcode == -1)
 439         {
 440                 m_State = HTTP_STATE_HOST_NOT_FOUND;
 441                 return 0;
 442         }
 443         //m_ControlSock
 444         if(m_Aborting)
 445                 return 0;
 446         se = getservbyname("http", NULL);
 447         if(m_Aborting)
 448                 return 0;
 449         if(se == NULL)
 450         {
 451                 hostaddr.sin_port = htons(80);
 452         }
 453         else
 454         {
 455                 hostaddr.sin_port = se->s_port;
 456         }
 457         hostaddr.sin_family = AF_INET;
 458         //ip = htonl(ip);
 459         memcpy(&hostaddr.sin_addr,&ip,4);
 460
 461         if(m_ProxyEnabled)
 462         {
 463                 //This is on a proxy, so we need to make sure to connect to the proxy machine
 464                 ip = inet_addr((const char *)m_ProxyIP);
 465
 466                 if(ip==INADDR_NONE)
 467                 {
 468                         http_Asyncgethostbyname(&ip,NW_AGHBN_LOOKUP,m_ProxyIP);
 469                         rcode = 0;
 470                         do
 471                         {
 472                                 if(m_Aborting)
 473                                 {
 474                                         http_Asyncgethostbyname(&ip,NW_AGHBN_CANCEL,m_ProxyIP);
 475                                         return 0;
 476                                 }
 477                                 rcode = http_Asyncgethostbyname(&ip,NW_AGHBN_READ,m_ProxyIP);
 478
 479                                 SDL_Delay(1);
 480                         }while(rcode==0);
 481
 482
 483                         if(rcode == -1)
 484                         {
 485                                 m_State = HTTP_STATE_HOST_NOT_FOUND;
 486                                 return 0;
 487                         }
 488
 489                 }
 490                 //Use either the proxy port or 80 if none specified
 491                 hostaddr.sin_port = htons((ushort)(m_ProxyPort ? m_ProxyPort : 80));
 492                 //Copy the proxy address...
 493                 memcpy(&hostaddr.sin_addr,&ip,4);
 494
 495         }
 496         //Now we will connect to the host
 497         fd_set  wfds;
 498
 499         timeval timeout;
 500         timeout.tv_sec = 0;
 501         timeout.tv_usec = 0;
 502         int serr = connect(m_DataSock, (struct sockaddr *)&hostaddr, sizeof(struct sockaddr));
 503         int cerr = WSAGetLastError();
 504         if(serr)
 505         {
 506                 while((cerr==WSAEALREADY)||(cerr==WSAEINVAL)||(cerr==WSAEWOULDBLOCK))
 507                 {
 508                         FD_ZERO(&wfds);
 509                         FD_SET( m_DataSock, &wfds );
 510                         if(select(0,NULL,&wfds,NULL,&timeout))
 511                         {
 512                                 serr = 0;
 513                                 break;
 514                         }
 515                         if(m_Aborting)
 516                                 return 0;
 517                         serr = connect(m_DataSock, (struct sockaddr *)&hostaddr, sizeof(struct sockaddr));
 518                         if(serr == 0)
 519                                 break;
 520                         cerr = WSAGetLastError();
 521                         if(cerr==WSAEISCONN)
 522                         {
 523                                 serr = 0;
 524                                 break;
 525                         }
 526
 527                         SDL_Delay(1);
 528                 };
 529         }
 530         if(serr)
 531         {
 532                 m_State = HTTP_STATE_CANT_CONNECT;
 533                 return 0;
 534         }
 535         m_State = HTTP_STATE_CONNECTED;
 536         return 1;
 537 }
 538
 539 char *ChttpGet::GetHTTPLine()
 540 {
 541         int iBytesRead;
 542         char chunk[2];
 543         unsigned int igotcrlf = 0;
 544         memset(recv_buffer,0,1000);
 545         do
 546         {
 547                 chunk[0]='\0';
 548                 bool gotdata = false;
 549                 do
 550                 {
 551                         iBytesRead = recv(m_DataSock,chunk,1,0);
 552
 553                         if(SOCKET_ERROR == iBytesRead)
 554                         {
 555                                 int error = WSAGetLastError();
 556                                 if(WSAEWOULDBLOCK==error)
 557                                 {
 558                                         gotdata = false;
 559                                         continue;
 560                                 }
 561                                 else
 562                                         return NULL;
 563                         }
 564                         else
 565                         {
 566                                 gotdata = true;
 567                         }
 568
 569                         SDL_Delay(1);
 570                 }while(!gotdata);
 571
 572                 if(chunk[0]==0x0d)
 573                 {
 574                         //This should always read a 0x0a
 575                         do
 576                         {
 577                                 iBytesRead = recv(m_DataSock,chunk,1,0);
 578
 579                                 if(SOCKET_ERROR == iBytesRead)
 580                                 {
 581                                         int error = WSAGetLastError();
 582                                         if(WSAEWOULDBLOCK==error)
 583                                         {
 584                                                 gotdata = false;
 585                                                 continue;
 586                                         }
 587                                         else
 588                                                 return NULL;
 589                                 }
 590                                 else
 591                                 {
 592                                         gotdata = true;
 593                                 }
 594
 595                                 SDL_Delay(1);
 596                         }while(!gotdata);
 597                         igotcrlf = 1;
 598                 }
 599                 else
 600                 {       chunk[1] = '\0';
 601                         SDL_strlcat(recv_buffer, chunk, sizeof(recv_buffer));
 602                 }
 603
 604                 SDL_Delay(1);
 605         }while(igotcrlf==0);
 606         return recv_buffer;
 607 }
 608
 609 unsigned int ChttpGet::ReadDataChannel()
 610 {
 611         char sDataBuffer[4096];         // Data-storage buffer for the data channel
 612         int nBytesRecv = 0;                                             // Bytes received from the data channel
 613
 614         fd_set  wfds;
 615
 616         timeval timeout;
 617         timeout.tv_sec = 0;
 618         timeout.tv_usec = 500;
 619
 620         m_State = HTTP_STATE_RECEIVING;
 621    do
 622    {
 623                 FD_ZERO(&wfds);
 624                 FD_SET( m_DataSock, &wfds );
 625
 626                 if((m_iBytesTotal)&&(m_iBytesIn==m_iBytesTotal))
 627                 {
 628                         break;
 629                 }
 630                 select(0,&wfds,NULL,NULL,&timeout);
 631         if(m_Aborting)
 632                 {
 633                         fclose(LOCALFILE);
 634                         return 0;
 635                 }
 636                 nBytesRecv = recv(m_DataSock, (char *)&sDataBuffer,sizeof(sDataBuffer), 0);
 637         if(m_Aborting)
 638                 {
 639                         fclose(LOCALFILE);
 640                         return 0;
 641                 }
 642                 if(SOCKET_ERROR == nBytesRecv)
 643                 {
 644                         int error = WSAGetLastError();
 645                         if(WSAEWOULDBLOCK==error)
 646                         {
 647                                 nBytesRecv = 1;
 648                                 continue;
 649                         }
 650                 }
 651                 m_iBytesIn += nBytesRecv;
 652                 if (nBytesRecv > 0 )
 653                 {
 654                         fwrite(sDataBuffer,nBytesRecv,1,LOCALFILE);
 655                         //Write sDataBuffer, nBytesRecv
 656         }
 657
 658                 SDL_Delay(1);
 659         }while (nBytesRecv > 0);
 660         fclose(LOCALFILE);
 661         // Close the file and check for error returns.
 662         if (nBytesRecv == SOCKET_ERROR)
 663         {
 664                 //Ok, we got a socket error -- xfer aborted?
 665                 m_State = HTTP_STATE_RECV_FAILED;
 666                 return 0;
 667         }
 668         else
 669         {
 670                 //OutputDebugString("HTTP File complete!\n");
 671                 //done!
 672                 m_State = HTTP_STATE_FILE_RECEIVED;
 673                 return 1;
 674         }
 675 }
 676
 677
 678 typedef struct _async_dns_lookup
 679 {
 680         unsigned int ip;        //resolved host. Write only to worker thread.
 681         char * host;//host name to resolve. read only to worker thread
 682         bool done;      //write only to the worker thread. Signals that the operation is complete
 683         bool error; //write only to worker thread. Thread sets this if the name doesn't resolve
 684         bool abort;     //read only to worker thread. If this is set, don't fill in the struct.
 685 }async_dns_lookup;
 686
 687 async_dns_lookup httpaslu;
 688 async_dns_lookup *http_lastaslu = NULL;
 689
 690 int http_gethostbynameworker(void *parm);
 691
 692 int http_Asyncgethostbyname(unsigned int *ip,int command, char *hostname)
 693 {
 694
 695         if(command==NW_AGHBN_LOOKUP)
 696         {
 697                 if(http_lastaslu)
 698                         http_lastaslu->abort = true;
 699
 700                 async_dns_lookup *newaslu;
 701                 newaslu = (async_dns_lookup *)malloc(sizeof(async_dns_lookup));
 702                 memset(&newaslu->ip,0,sizeof(unsigned int));
 703                 newaslu->host = hostname;
 704                 newaslu->done = false;
 705                 newaslu->error = false;
 706                 newaslu->abort = false;
 707                 http_lastaslu = newaslu;
 708                 httpaslu.done = false;
 709
 710                 SDL_CreateThread(http_gethostbynameworker, "GetHostByNameWorker", newaslu);
 711
 712                 return 1;
 713         }
 714         else if(command==NW_AGHBN_CANCEL)
 715         {
 716                 if(http_lastaslu)
 717                         http_lastaslu->abort = true;
 718                 http_lastaslu = NULL;
 719         }
 720         else if(command==NW_AGHBN_READ)
 721         {
 722                 if(!http_lastaslu)
 723                         return -1;
 724                 if(httpaslu.done)
 725                 {
 726                         //free(http_lastaslu);
 727                         http_lastaslu = NULL;
 728                         memcpy(ip,&httpaslu.ip,sizeof(unsigned int));
 729                         return 1;
 730                 }
 731                 else if(httpaslu.error)
 732                 {
 733                         free(http_lastaslu);
 734                         http_lastaslu = NULL;
 735                         return -1;
 736                 }
 737                 else return 0;
 738         }
 739         return -2;
 740
 741 }
 742
 743 // This is the worker thread which does the lookup.
 744 int http_gethostbynameworker(void *parm)
 745 {
 746         async_dns_lookup *lookup = (async_dns_lookup *)parm;
 747         struct hostent *he = gethostbyname(lookup->host);
 748         if(he==NULL)
 749         {
 750                 lookup->error = true;
 751                 return 1;
 752         }
 753         else if(!lookup->abort)
 754         {
 755                 memcpy(&lookup->ip,he->h_addr_list[0],sizeof(unsigned int));
 756                 lookup->done = true;
 757                 memcpy(&httpaslu,lookup,sizeof(async_dns_lookup));
 758         }
 759         free(lookup);
 760
 761         return 0;
 762 }