aboutsummaryrefslogtreecommitdiff
path: root/tests/server/sws.c
blob: 161cea678fa8aa05b41a5af9bb3d6f3e5ae081af (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2005, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id$
 ***************************************************************************/

/* sws.c: simple (silly?) web server

   This code was originally graciously donated to the project by Juergen
   Wilke. Thanks a bunch!

 */
#include "setup.h" /* portability help from the lib directory */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef _XOPEN_SOURCE_EXTENDED
/* This define is "almost" required to build on HPUX 11 */
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif

#define ENABLE_CURLX_PRINTF
/* make the curlx header define all printf() functions to use the curlx_*
   versions instead */
#include "curlx.h" /* from the private lib dir */
#include "getpart.h"
#include "util.h"

#ifdef ENABLE_IPV6
#define SWS_IPV6
#endif

#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif

#if defined(WIN32) && !defined(__CYGWIN__)
#include <windows.h>
#include <winsock2.h>
#include <process.h>

#define sleep(sec)   Sleep ((sec)*1000)

#define EINPROGRESS  WSAEINPROGRESS
#define EWOULDBLOCK  WSAEWOULDBLOCK
#define EISCONN      WSAEISCONN
#define ENOTSOCK     WSAENOTSOCK
#define ECONNREFUSED WSAECONNREFUSED

static void win32_cleanup(void);

#if defined(ENABLE_IPV6) && defined(__MINGW32__)
const struct in6_addr in6addr_any = {{ IN6ADDR_ANY_INIT }};
#endif
#endif

/* include memdebug.h last */
#include "memdebug.h"

#define REQBUFSIZ 150000
#define REQBUFSIZ_TXT "149999"

long prevtestno=-1; /* previous test number we served */
long prevpartno=-1; /* previous part number we served */
bool prevbounce;    /* instructs the server to increase the part number for
                       a test in case the identical testno+partno request
                       shows up again */

struct httprequest {
  char reqbuf[REQBUFSIZ]; /* buffer area for the incoming request */
  int offset;     /* size of the incoming request */
  long testno;     /* test number found in the request */
  long partno;     /* part number found in the request */
  int open;       /* keep connection open info, as found in the request */
  bool auth_req;  /* authentication required, don't wait for body unless
                     there's an Authorization header */
  bool auth;      /* Authorization header present in the incoming request */
  size_t cl;      /* Content-Length of the incoming request */
  bool digest;    /* Authorization digest header found */
  bool ntlm;      /* Authorization ntlm header found */
};

int ProcessRequest(struct httprequest *req);
void storerequest(char *reqbuf);

#define DEFAULT_PORT 8999

#ifndef DEFAULT_LOGFILE
#define DEFAULT_LOGFILE "log/sws.log"
#endif

const char *serverlogfile = DEFAULT_LOGFILE;

#define SWSVERSION "cURL test suite HTTP server/0.1"

#define REQUEST_DUMP  "log/server.input"
#define RESPONSE_DUMP "log/server.response"

#define TEST_DATA_PATH "%s/data/test%ld"

/* very-big-path support */
#define MAXDOCNAMELEN 140000
#define MAXDOCNAMELEN_TXT "139999"

#define REQUEST_KEYWORD_SIZE 256

#define CMD_AUTH_REQUIRED "auth_required"

#define END_OF_HEADERS "\r\n\r\n"

/* global variable, where to find the 'data' dir */
const char *path=".";

enum {
  DOCNUMBER_NOTHING = -7,
  DOCNUMBER_QUIT    = -6,
  DOCNUMBER_BADCONNECT = -5,
  DOCNUMBER_INTERNAL= -4,
  DOCNUMBER_CONNECT = -3,
  DOCNUMBER_WERULEZ = -2,
  DOCNUMBER_404     = -1
};


/* sent as reply to a QUIT */
static const char *docquit =
"HTTP/1.1 200 Goodbye" END_OF_HEADERS;

/* sent as reply to a CONNECT */
static const char *docconnect =
"HTTP/1.1 200 Mighty fine indeed" END_OF_HEADERS;

/* sent as reply to a "bad" CONNECT */
static const char *docbadconnect =
"HTTP/1.1 501 Forbidden you fool" END_OF_HEADERS;

/* send back this on 404 file not found */
static const char *doc404 = "HTTP/1.1 404 Not Found\r\n"
    "Server: " SWSVERSION "\r\n"
    "Connection: close\r\n"
    "Content-Type: text/html"
    END_OF_HEADERS
    "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n"
    "<HTML><HEAD>\n"
    "<TITLE>404 Not Found</TITLE>\n"
    "</HEAD><BODY>\n"
    "<H1>Not Found</H1>\n"
    "The requested URL was not found on this server.\n"
    "<P><HR><ADDRESS>" SWSVERSION "</ADDRESS>\n" "</BODY></HTML>\n";

#ifdef SIGPIPE
static volatile int sigpipe;  /* Why? It's not used */
#endif

#ifdef SIGPIPE
static void sigpipe_handler(int sig)
{
  (void)sig; /* prevent warning */
  sigpipe = 1;
}
#endif

#if defined(WIN32) && !defined(__CYGWIN__)
#undef perror
#define perror(m) win32_perror(m)

static void win32_perror (const char *msg)
{
  char buf[256];
  DWORD err = WSAGetLastError();

  if (!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
                     LANG_NEUTRAL, buf, sizeof(buf), NULL))
     snprintf(buf, sizeof(buf), "Unknown error %lu (%#lx)", err, err);
  if (msg)
     fprintf(stderr, "%s: ", msg);
  fprintf(stderr, "%s\n", buf);
}
#endif

static char *test2file(long testno)
{
  static char filename[256];
  sprintf(filename, TEST_DATA_PATH, path, testno);
  return filename;
}


int ProcessRequest(struct httprequest *req)
{
  char *line=req->reqbuf;
  char chunked=FALSE;
  static char request[REQUEST_KEYWORD_SIZE];
  static char doc[MAXDOCNAMELEN];
  char logbuf[256];
  int prot_major, prot_minor;
  char *end;
  end = strstr(req->reqbuf, END_OF_HEADERS);

  /* try to figure out the request characteristics as soon as possible, but
     only once! */
  if((req->testno == DOCNUMBER_NOTHING) &&
     sscanf(line, "%" REQBUFSIZ_TXT"s %" MAXDOCNAMELEN_TXT "s HTTP/%d.%d",
            request,
            doc,
            &prot_major,
            &prot_minor) == 4) {
    char *ptr;

    /* find the last slash */
    ptr = strrchr(doc, '/');

    /* get the number after it */
    if(ptr) {
      FILE *stream;
      char *filename;

      if((strlen(doc) + strlen(request)) < 200)
        sprintf(logbuf, "Got request: %s %s HTTP/%d.%d",
                request, doc, prot_major, prot_minor);
      else
        sprintf(logbuf, "Got a *HUGE* request HTTP/%d.%d",
                prot_major, prot_minor);
      logmsg(logbuf);

      if(!strncmp("/verifiedserver", ptr, 15)) {
        logmsg("Are-we-friendly question received");
        req->testno = DOCNUMBER_WERULEZ;
        return 1; /* done */
      }

      if(!strncmp("/quit", ptr, 15)) {
        logmsg("Request-to-quit received");
        req->testno = DOCNUMBER_QUIT;
        return 1; /* done */
      }

      ptr++; /* skip the slash */

      req->testno = strtol(ptr, &ptr, 10);

      if(req->testno > 10000) {
        req->partno = req->testno % 10000;
        req->testno /= 10000;
      }
      else
        req->partno = 0;

      sprintf(logbuf, "Requested test number %ld part %ld",
              req->testno, req->partno);

      logmsg(logbuf);

      filename = test2file(req->testno);

      stream=fopen(filename, "rb");
      if(!stream) {
        logmsg("Couldn't open test file %d", req->testno);
        req->open = FALSE; /* closes connection */
        return 0;
      }
      else {
        char *cmd = NULL;
        size_t cmdsize = 0;

        /* get the custom server control "commands" */
        cmd = (char *)spitout(stream, "reply", "servercmd", &cmdsize);
        fclose(stream);

        if(cmdsize) {
          logmsg("Found a reply-servercmd section!");

          if(!strncmp(CMD_AUTH_REQUIRED, cmd, strlen(CMD_AUTH_REQUIRED))) {
            logmsg("instructed to require authorization header");
            req->auth_req = TRUE;
          }
          free(cmd);
        }
      }
    }
    else {
      if(sscanf(req->reqbuf, "CONNECT %" MAXDOCNAMELEN_TXT "s HTTP/%d.%d",
                doc, &prot_major, &prot_minor) == 3) {
        sprintf(logbuf, "Receiced a CONNECT %s HTTP/%d.%d request",
                doc, prot_major, prot_minor);
        logmsg(logbuf);

        if(prot_major*10+prot_minor == 10)
          req->open = FALSE; /* HTTP 1.0 closes connection by default */

        if(!strncmp(doc, "bad", 3))
          /* if the host name starts with bad, we fake an error here */
          req->testno = DOCNUMBER_BADCONNECT;
        else if(!strncmp(doc, "test", 4)) {
          /* if the host name starts with test, the port number used in the
             CONNECT line will be used as test number! */
          char *ptr = strchr(doc, ':');
          if(ptr)
            req->testno = atoi(ptr+1);
          else
            req->testno = DOCNUMBER_CONNECT;
        }
        else
          req->testno = DOCNUMBER_CONNECT;
      }
      else {
        logmsg("Did not find test number in PATH");
        req->testno = DOCNUMBER_404;
      }
    }
  }

  if(!end)
    /* we don't have a complete request yet! */
    return 0;

  /* **** Persistancy ****
   *
   * If the request is a HTTP/1.0 one, we close the connection unconditionally
   * when we're done.
   *
   * If the request is a HTTP/1.1 one, we MUST check for a "Connection:"
   * header that might say "close". If it does, we close a connection when
   * this request is processed. Otherwise, we keep the connection alive for X
   * seconds.
   */

  do {
    if(!req->cl && curlx_strnequal("Content-Length:", line, 15)) {
      /* If we don't ignore content-length, we read it and we read the whole
         request including the body before we return. If we've been told to
         ignore the content-length, we will return as soon as all headers
         have been received */
      req->cl = strtol(line+15, &line, 10);

      logmsg("Found Content-Length: %d in the request", req->cl);
      break;
    }
    else if(curlx_strnequal("Transfer-Encoding: chunked", line,
                            strlen("Transfer-Encoding: chunked"))) {
      /* chunked data coming in */
      chunked = TRUE;
    }

    if(chunked) {
      if(strstr(req->reqbuf, "\r\n0\r\n"))
        /* end of chunks reached */
        return 1; /* done */
      else
        return 0; /* not done */
    }

    line = strchr(line, '\n');
    if(line)
      line++;
  } while(line);

  if(!req->auth && strstr(req->reqbuf, "Authorization:")) {
    req->auth = TRUE; /* Authorization: header present! */
    if(req->auth_req)
      logmsg("Authorization header found, as required");
  }

  if(!req->digest && strstr(req->reqbuf, "Authorization: Digest")) {
    /* If the client is passing this Digest-header, we set the part number
       to 1000. Not only to spice up the complexity of this, but to make
       Digest stuff to work in the test suite. */
    req->partno += 1000;
    req->digest = TRUE; /* header found */
    logmsg("Received Digest request, sending back data %d", req->partno);
  }
  else if(!req->ntlm &&
          strstr(req->reqbuf, "Authorization: NTLM TlRMTVNTUAAD")) {
    /* If the client is passing this type-3 NTLM header */
    req->partno += 1002;
    req->ntlm = TRUE; /* NTLM found */
    logmsg("Received NTLM type-3, xxxxxxxxxxxxx sending back data %d", req->partno);
    if(req->cl) {
      logmsg("  Expecting %d POSTed bytes", req->cl);
    }
  }
  else if(!req->ntlm &&
          strstr(req->reqbuf, "Authorization: NTLM TlRMTVNTUAAB")) {
    /* If the client is passing this type-1 NTLM header */
    req->partno += 1001;
    req->ntlm = TRUE; /* NTLM found */
    logmsg("Received NTLM type-1, sending back data %d", req->partno);
  }
  if(strstr(req->reqbuf, "Connection: close"))
    req->open = FALSE; /* close connection after this request */

  /* If authentication is required and no auth was provided, end now. This
     makes the server NOT wait for PUT/POST data and you can then make the
     test case send a rejection before any such data has been sent. Test case
     154 uses this.*/
  if(req->auth_req && !req->auth)
    return 1;

  if(req->cl) {
    if(req->cl <= strlen(end+strlen(END_OF_HEADERS)))
      return 1; /* done */
    else
      return 0; /* not complete yet */
  }
  return 1; /* done */
}

/* store the entire request in a file */
void storerequest(char *reqbuf)
{
  FILE *dump;

  dump = fopen(REQUEST_DUMP, "ab"); /* b is for windows-preparing */
  if(dump) {
    size_t len = strlen(reqbuf);
    fwrite(reqbuf, 1, len, dump);

    fclose(dump);
    logmsg("Wrote request (%d bytes) input to " REQUEST_DUMP,
           (int)len);
  }
  else {
    logmsg("Failed to write request input to " REQUEST_DUMP);
  }
}

/* return 0 on success, non-zero on failure */
static int get_request(int sock, struct httprequest *req)
{
  int fail= FALSE;
  char *reqbuf = req->reqbuf;

  /*** Init the httpreqest structure properly for the upcoming request ***/
  memset(req, 0, sizeof(struct httprequest));

  /* here's what should not be 0 from the start */
  req->testno = DOCNUMBER_NOTHING; /* safe default */
  req->open = TRUE; /* connection should remain open and wait for more
                       commands */

  /*** end of httprequest init ***/

  while (req->offset < REQBUFSIZ) {
    int got = sread(sock, reqbuf + req->offset, REQBUFSIZ - req->offset);
    if (got <= 0) {
      if (got < 0) {
        perror("recv");
        logmsg("recv() returned error");
        return DOCNUMBER_INTERNAL;
      }
      logmsg("Connection closed by client");
      reqbuf[req->offset]=0;

      /* dump the request receivied so far to the external file */
      storerequest(reqbuf);
      return DOCNUMBER_INTERNAL;
    }
    req->offset += got;

    reqbuf[req->offset] = 0;

    if(ProcessRequest(req))
      break;
  }

  if (req->offset >= REQBUFSIZ) {
    logmsg("Request buffer overflow, closing connection");
    reqbuf[REQBUFSIZ-1]=0;
    fail = TRUE;
    /* dump the request to an external file anyway */
  }
  else
    reqbuf[req->offset]=0;

  /* dump the request to an external file */
  storerequest(reqbuf);

  return fail; /* success */
}

/* returns -1 on failure */
static int send_doc(int sock, struct httprequest *req)
{
  int written;
  size_t count;
  const char *buffer;
  char *ptr;
  FILE *stream;
  char *cmd=NULL;
  size_t cmdsize=0;
  FILE *dump;
  int persistant = TRUE;
  size_t responsesize;

  static char weare[256];

  char partbuf[80]="data";

  req->open = FALSE;

  logmsg("Send response number %d part %d", req->testno, req->partno);

  if(req->testno < 0) {
    switch(req->testno) {
    case DOCNUMBER_QUIT:
      logmsg("Replying to QUIT");
      buffer = docquit;
      break;
    case DOCNUMBER_WERULEZ:
      /* we got a "friends?" question, reply back that we sure are */
      logmsg("Identifying ourselves as friends");
      sprintf(weare, "HTTP/1.1 200 OK\r\n\r\nWE ROOLZ: %d\r\n",
              (int)getpid());
      buffer = weare;
      break;
    case DOCNUMBER_INTERNAL:
      logmsg("Bailing out due to internal error");
      return -1;
    case DOCNUMBER_CONNECT:
      logmsg("Replying to CONNECT");
      buffer = docconnect;
      break;
    case DOCNUMBER_BADCONNECT:
      logmsg("Replying to a bad CONNECT");
      buffer = docbadconnect;
      break;
    case DOCNUMBER_404:
    default:
      logmsg("Replying to with a 404");
      buffer = doc404;
      break;
    }
    ptr = NULL;
    stream=NULL;

    count = strlen(buffer);
  }
  else {
    char *filename = test2file(req->testno);

    if(0 != req->partno)
      sprintf(partbuf, "data%ld", req->partno);

    stream=fopen(filename, "rb");
    if(!stream) {
      logmsg("Couldn't open test file");
      return 0;
    }
    else {
      buffer = spitout(stream, "reply", partbuf, &count);
      ptr = (char *)buffer;
      fclose(stream);
    }

    /* re-open the same file again */
    stream=fopen(filename, "rb");
    if(!stream) {
      logmsg("Couldn't open test file");
      return 0;
    }
    else {
      /* get the custom server control "commands" */
      cmd = (char *)spitout(stream, "reply", "postcmd", &cmdsize);
      fclose(stream);
    }
  }

  dump = fopen(RESPONSE_DUMP, "ab"); /* b is for windows-preparing */
  if(!dump) {
    logmsg("couldn't create logfile: " RESPONSE_DUMP);
    return -1;
  }

  /* If the word 'swsclose' is present anywhere in the reply chunk, the
     connection will be closed after the data has been sent to the requesting
     client... */
  if(strstr(buffer, "swsclose") || !count) {
    persistant = FALSE;
    logmsg("connection close instruction \"swsclose\" found in response");
  }
  if(strstr(buffer, "swsbounce")) {
    prevbounce = TRUE;
    logmsg("enable \"swsbounce\" in the next request");
  }
  else
    prevbounce = FALSE;


  responsesize = count;
  do {
    written = swrite(sock, buffer, count);
    if (written < 0) {
      logmsg("Sending response failed and we bailed out!");
      return -1;
    }
    /* write to file as well */
    fwrite(buffer, 1, written, dump);

    count -= written;
    buffer += written;
  } while(count>0);

  fclose(dump);

  logmsg("Response sent (%d bytes) and written to " RESPONSE_DUMP,
         responsesize);

  if(ptr)
    free(ptr);

  if(cmdsize > 0 ) {
    char command[32];
    int num;
    char *ptr=cmd;
    do {
      if(2 == sscanf(ptr, "%31s %d", command, &num)) {
        if(!strcmp("wait", command)) {
          logmsg("Told to sleep for %d seconds", num);
          sleep(num); /* wait this many seconds */
        }
        else
          logmsg("Unknown command in reply command section");
      }
      ptr = strchr(ptr, '\n');
      if(ptr)
        ptr++;
      else
        ptr = NULL;
    } while(ptr && *ptr);
  }
  if(cmd)
    free(cmd);

  req->open = persistant;

  prevtestno = req->testno;
  prevpartno = req->partno;

  return 0;
}

#if defined(WIN32) && !defined(__CYGWIN__)
static void win32_init(void)
{
  WORD wVersionRequested;
  WSADATA wsaData;
  int err;
  wVersionRequested = MAKEWORD(2, 0);

  err = WSAStartup(wVersionRequested, &wsaData);

  if (err != 0) {
    perror("Winsock init failed");
    logmsg("Error initialising winsock -- aborting\n");
    exit(1);
  }

  if ( LOBYTE( wsaData.wVersion ) != 2 ||
       HIBYTE( wsaData.wVersion ) != 0 ) {

    WSACleanup();
    perror("Winsock init failed");
    logmsg("No suitable winsock.dll found -- aborting\n");
    exit(1);
  }
}
static void win32_cleanup(void)
{
  WSACleanup();
}
#endif

char use_ipv6=FALSE;

int main(int argc, char *argv[])
{
  struct sockaddr_in me;
#ifdef ENABLE_IPV6
  struct sockaddr_in6 me6;
#endif /* ENABLE_IPV6 */
  int sock, msgsock, flag;
  unsigned short port = DEFAULT_PORT;
  FILE *pidfile;
  char *pidname= (char *)".http.pid";
  struct httprequest req;
  int rc;
  int arg=1;

  while(argc>arg) {
    if(!strcmp("--version", argv[arg])) {
      printf("sws IPv4%s\n",
#ifdef ENABLE_IPV6
             "/IPv6"
#else
             ""
#endif
             );
      return 0;
    }
    else if(!strcmp("--pidfile", argv[arg])) {
      arg++;
      if(argc>arg)
        pidname = argv[arg++];
    }
    else if(!strcmp("--ipv6", argv[arg])) {
#ifdef ENABLE_IPV6
      use_ipv6=TRUE;
#endif
      arg++;
    }
    else if(argc>arg) {

      if(atoi(argv[arg]))
        port = (unsigned short)atoi(argv[arg++]);

      if(argc>arg)
        path = argv[arg++];
    }
  }

#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
  win32_init();
  atexit(win32_cleanup);
#else

#ifdef SIGPIPE
#ifdef HAVE_SIGNAL
  signal(SIGPIPE, sigpipe_handler);
#endif
#ifdef HAVE_SIGINTERRUPT
  siginterrupt(SIGPIPE, 1);
#endif
#endif
#endif

#ifdef ENABLE_IPV6
  if(!use_ipv6)
#endif
    sock = socket(AF_INET, SOCK_STREAM, 0);
#ifdef ENABLE_IPV6
  else
    sock = socket(AF_INET6, SOCK_STREAM, 0);
#endif

  if (sock < 0) {
    perror("opening stream socket");
    logmsg("Error opening socket");
    exit(1);
  }

  flag = 1;
  if (setsockopt
      (sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &flag,
       sizeof(int)) < 0) {
    perror("setsockopt(SO_REUSEADDR)");
  }

#ifdef ENABLE_IPV6
  if(!use_ipv6) {
#endif
    me.sin_family = AF_INET;
    me.sin_addr.s_addr = INADDR_ANY;
    me.sin_port = htons(port);
    rc = bind(sock, (struct sockaddr *) &me, sizeof(me));
#ifdef ENABLE_IPV6
  }
  else {
    memset(&me6, 0, sizeof(struct sockaddr_in6));
    me6.sin6_family = AF_INET6;
    me6.sin6_addr = in6addr_any;
    me6.sin6_port = htons(port);
    rc = bind(sock, (struct sockaddr *) &me6, sizeof(me6));
  }
#endif /* ENABLE_IPV6 */
  if(rc < 0) {
    perror("binding stream socket");
    logmsg("Error binding socket");
    exit(1);
  }

  pidfile = fopen(pidname, "w");
  if(pidfile) {
    fprintf(pidfile, "%d\n", (int)getpid());
    fclose(pidfile);
  }
  else
    fprintf(stderr, "Couldn't write pid file\n");

  logmsg("Running IPv%d version on port %d",
#ifdef ENABLE_IPV6
         (use_ipv6?6:4)
#else
         4
#endif
	 , port );

  /* start accepting connections */
  listen(sock, 5);

  while (1) {
    msgsock = accept(sock, NULL, NULL);

    if (msgsock == -1)
      continue;

    logmsg("====> Client connect");

    do {
      if(get_request(msgsock, &req))
        /* non-zero means error, break out of loop */
        break;

      if(prevbounce) {
        /* bounce treatment requested */
        if((req.testno == prevtestno) &&
           (req.partno == prevpartno)) {
          req.partno++;
          logmsg("BOUNCE part number to %ld", req.partno);
        }
      }

      send_doc(msgsock, &req);

      if((req.testno < 0) && (req.testno != DOCNUMBER_CONNECT)) {
        logmsg("special request received, no persistancy");
        break;
      }
      if(!req.open) {
        logmsg("instructed to close connection after server-reply");
        break;
      }

      if(req.open)
        logmsg("=> persistant connection request ended, awaits new request");
      /* if we got a CONNECT, loop and get another request as well! */
    } while(req.open || (req.testno == DOCNUMBER_CONNECT));

    logmsg("====> Client disconnect");
    sclose(msgsock);

    if (req.testno == DOCNUMBER_QUIT)
      break;
  }

  sclose(sock);

  return 0;
}