summaryrefslogtreecommitdiffstats
path: root/nanohttp/nanohttp-socket.c
blob: 5fc55239c7f67f60ffd6f9425700b210d2de86a5 (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
/******************************************************************
*  $Id: nanohttp-socket.c,v 1.40 2006/01/06 15:16:03 mrcsys Exp $
*
* CSOAP Project:  A http client/server library in C
* Copyright (C) 2003  Ferhat Ayaz
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA  02111-1307, USA.
*
* Email: ayaz@jprogrammer.net
******************************************************************/
#include <nanohttp/nanohttp-socket.h>
#include <nanohttp/nanohttp-common.h>
#include <nanohttp/nanohttp-ssl.h>

#ifdef WIN32
  #include "wsockcompat.h"
  #include <winsock2.h>
  #include <process.h>
  
  #ifndef __MINGW32__
    typedef int ssize_t;
  #endif
  
#else
  #include <fcntl.h>
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif

#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif

#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <stdio.h>
#include <errno.h>
#include <string.h>

#ifdef MEM_DEBUG
#include <utils/alloc.h>
#endif


#ifdef WIN32
#undef errno
#define errno WSAGetLastError()
#endif


#ifdef HAVE_SSL
SSL_CTX* SSLctx = NULL;
char *SSLCert = NULL;
char *SSLPass = NULL;
char *SSLCA = NULL;
int SSLCertLess = 0;
#endif

/*--------------------------------------------------
FUNCTION: hsocket_module_init
NOTE: This will be called from httpd_init()
	for server and from httpc_init() for client
----------------------------------------------------*/
herror_t
hsocket_module_init ()
{
#ifdef WIN32
  struct WSAData info;
  WSAStartup (MAKEWORD (2, 2), &info);

#else /* */
  /* nothing to init for unix sockets */
#endif /* */
  return H_OK;
}

/*--------------------------------------------------
FUNCTION: hsocket_module_destroy
----------------------------------------------------*/
void
hsocket_module_destroy ()
{
#ifdef WIN32
  WSACleanup ();

#else /* */
  /* nothing to destroy for unix sockets */
#endif /* */
}

/*--------------------------------------------------
FUNCTION: hsocket_init
----------------------------------------------------*/
herror_t
hsocket_init (hsocket_t * sock )
{
  log_verbose1("Starting hsocket init");
  /* just set the descriptor to -1 */
  sock->sock = -1;
#ifdef HAVE_SSL
  sock->ssl = NULL;
  if(SSLCert || SSLCertLess){
	  log_verbose1("calling init ctx");
      SSLctx=initialize_ctx( SSLCert,SSLPass,SSLCA);
      if(SSLctx==NULL){
            return herror_new("hsocket_init", HSOCKET_ERROR_CONNECT, "Unable to initialize SSL CTX" );
      }
  }
#endif
  return H_OK;
}

/*--------------------------------------------------
FUNCTION: hsocket_free
----------------------------------------------------*/
void
hsocket_free (hsocket_t sock)
{
  /* nothing to free for unix sockets */
}

/*--------------------------------------------------
FUNCTION: hsocket_open
----------------------------------------------------*/
herror_t
hsocket_open (hsocket_t * dsock, const char *hostname, int port)
{
  hsocket_t sock;
  char *ip;
  struct sockaddr_in address;
  struct hostent *host;

  sock.sock = socket (AF_INET, SOCK_STREAM, 0);
  if (sock.sock <= 0)
    return herror_new("hsocket_open", HSOCKET_ERROR_CREATE, "Socket error: %d", errno);

  /* Get host data */
  host = gethostbyname (hostname);
  if (host == NULL)
    return herror_new("hsocket_open", HSOCKET_ERROR_GET_HOSTNAME, "Socket error: %d", errno);

  ip = inet_ntoa (*(struct in_addr *) *host->h_addr_list);
  address.sin_addr.s_addr = inet_addr (ip);

  /* set server addresss */
  address.sin_family = host->h_addrtype;
  address.sin_port = htons((unsigned short)port);

  /* connect to the server */
  if (connect (sock.sock, (struct sockaddr *) &address, sizeof (address)) != 0)
    return herror_new("hsocket_open", HSOCKET_ERROR_CONNECT, "Socket error: %d", errno);

#ifdef HAVE_SSL
  if( !SSLctx ){
#endif
    log_verbose1("Using HTTP");
    dsock->sock = sock.sock;
#ifdef HAVE_SSL
  } else {
    log_verbose1("Using HTTPS");
    dsock->ssl = init_ssl(SSLctx, sock.sock, SSL_CLIENT);
  }
#endif
  return H_OK;
}

/*--------------------------------------------------
FUNCTION: hsocket_bind
----------------------------------------------------*/
herror_t
hsocket_bind (hsocket_t * dsock, int port)
{
  hsocket_t sock;
  struct sockaddr_in addr;
  int opt=1;

  /* create socket */
  sock.sock = socket (AF_INET, SOCK_STREAM, 0);
  if (sock.sock == -1)
  {
    log_error3 ("Can not create socket: '%s'", "Socket error: %d", errno);
    return herror_new("hsocket_bind", HSOCKET_ERROR_CREATE, "Socket error: %d", errno);
  }

  setsockopt( sock.sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt) );
  /* bind socket */
  addr.sin_family = AF_INET;
  addr.sin_port = htons ((unsigned short)port); /* short, network byte order */
  addr.sin_addr.s_addr = INADDR_ANY;
  memset (&(addr.sin_zero), '\0', 8);   /* zero the rest of the
                                         * struct */

  if (bind (sock.sock, (struct sockaddr *) &addr, sizeof (struct sockaddr)) == -1)
  {
    log_error3 ("Can not bind: '%s'", "Socket error: %d", errno);
    return herror_new("hsocket_bind", HSOCKET_ERROR_BIND, "Socket error: %d", errno);
  }
  dsock->sock = sock.sock;
  return H_OK;
}

/*----------------------------------------------------------
FUNCTION: hsocket_accept
----------------------------------------------------------*/
herror_t
hsocket_accept (hsocket_t sock, hsocket_t * dest)
{
  socklen_t asize;
  hsocket_t sockfd;
  struct sockaddr_in addr;

  if (sock.sock <= 0)
	return herror_new("hsocket_accept", HSOCKET_ERROR_NOT_INITIALIZED, 
	 "Called hsocket_listen() before initializing!");

  asize = sizeof (struct sockaddr_in);
#ifdef WIN32
  while (1)
  {
    sockfd.sock = accept (sock.sock, (struct sockaddr *) &addr, &asize);
    if (sockfd.sock == INVALID_SOCKET)   {
      if (WSAGetLastError () != WSAEWOULDBLOCK)
		return herror_new("hsocket_accept", HSOCKET_ERROR_ACCEPT, "Socket error: %d", errno);
    } else  {
      break;
    }
  }
#else 
/* TODO (#1#): why not a loop like in win32? */
  sockfd.sock = accept (sock.sock, (struct sockaddr *) &addr, &asize);
  if (sockfd.sock == -1) {
		return herror_new("hsocket_accept", HSOCKET_ERROR_ACCEPT, "Socket error: %d", errno);
  }
#endif 
/* TODO (#1#): Write to access.log file */

  log_verbose3 ("accept new socket (%d) from '%s'", sockfd.sock,
                SAVE_STR (((char *) inet_ntoa (addr.sin_addr))));

  dest->sock = sockfd.sock;
  return H_OK;
}

/*--------------------------------------------------
FUNCTION: hsocket_listen
----------------------------------------------------*/
herror_t
hsocket_listen (hsocket_t sock)
{
  if (sock.sock <= 0)
	return herror_new("hsocket_listen", HSOCKET_ERROR_NOT_INITIALIZED, 
	 "Called hsocket_listen() before initializing!");

  if (listen (sock.sock, 15) == -1)
  {
    log_error3 ("Can not listen: '%s'", "Socket error: %d", errno);
	return herror_new("hsocket_listen", HSOCKET_ERROR_LISTEN, "Socket error: %d", errno);
  }

  return H_OK;
}

#if 0
static
void _hsocket_wait_until_receive(hsocket_t sock)
{
  fd_set fds;
  struct timeval timeout;


  timeout.tv_sec = 1;
  timeout.tv_usec = 0;

  while (1) 
  {
    log_verbose1 ("waiting until receive mode");
    /* zero and set file descriptior */
    FD_ZERO (&fds);
    FD_SET (sock, &fds);
  
    /* select socket descriptor */
    switch (select (sock + 1, &fds,  NULL, NULL, &timeout))
    {
    case 0:
      /* descriptor is not ready */
      continue;
    case -1:
      /* got a signal? */
      continue;
    default:
      /* no nothing */
      break;
    }
    if (FD_ISSET (sock, &fds))
    {
      break;
    }
  }
}
#endif

/*--------------------------------------------------
FUNCTION: hsocket_close
----------------------------------------------------*/
void
hsocket_close (hsocket_t sock)
{
  char junk[10];
/*  _hsocket_wait_until_receive(sock);*/
  log_verbose2 ("closing socket %d...", sock.sock);
/*  
  struct linger _linger;
	hsocket_block(sock,1);
  _linger.l_onoff =1;
  _linger.l_linger = 30000;
  setsockopt(sock, SOL_SOCKET, SO_LINGER, (const char*)&_linger, sizeof(struct linger));
*/
   

#ifdef WIN32
  /*shutdown(sock,SD_RECEIVE);*/
  

  shutdown(sock.sock, SD_SEND);
  while (recv(sock.sock, junk, sizeof(junk), 0)>0) { };  
  closesocket(sock.sock);
  
#else
  /* XXX m. campbell - It seems like the while loop here needs this */
  fcntl( sock.sock, F_SETFL, O_NONBLOCK);
#ifdef HAVE_SSL
  if( sock.ssl ){
    log_verbose1("Closing SSL");
    ssl_cleanup(sock.ssl);
    shutdown(sock.sock, SHUT_RDWR);
    while (recv(sock.sock, junk, sizeof(junk), 0)>0) { };  
    close (sock.sock);
  }else {
#endif
      shutdown(sock.sock, SHUT_RDWR);
      while (recv(sock.sock, junk, sizeof(junk), 0)>0) { };  
      close (sock.sock);
#ifdef HAVE_SSL
  }
#endif
#endif
  log_verbose1 ("socket closed");
}

#if 0
static int _test_send_to_file(const char* filename, const byte_t* bytes,int n)
{
	int size;
	FILE *f = fopen(filename, "ab");
	if (!f) f = fopen(filename, "wb");
	size= fwrite(bytes, 1, n, f);
	fclose(f);
	return size;
}
#endif
/*--------------------------------------------------
FUNCTION: hsocket_send
----------------------------------------------------*/
herror_t
hsocket_nsend (hsocket_t sock, const byte_t *bytes, int n)
{
  int size;
  int total=0;

  log_verbose1( "Starting to send" );
#ifdef HAVE_SSL
  if (sock.sock <= 0 && !sock.ssl)
#else
  if (sock.sock <= 0)
#endif
	return herror_new("hsocket_nsend", HSOCKET_ERROR_NOT_INITIALIZED, 
	 "Called hsocket_listen() before initializing!");

  //log_verbose2( "SENDING %s", bytes );

  /* TODO (#1#): check return value and send again until n bytes sent */
  while (1)
  {
#ifdef HAVE_SSL
    if(sock.ssl){
        size = SSL_write(sock.ssl, bytes + total, n);
    } else {
#endif
        size = send((int) sock.sock, bytes + total, n, 0);
#ifdef HAVE_SSL
    }
#endif
    log_verbose2("Sent %d", size );
	 /* size = _test_send_to_file(filename, bytes, n);*/
#ifdef WIN32
    if (size == INVALID_SOCKET)
        if (WSAGetLastError () == WSAEWOULDBLOCK)
          continue;
        else       
		return herror_new("hsocket_nsend", HSOCKET_ERROR_SEND, "Socket error: %d", errno);
#else
    if (size == -1){
#ifdef HAVE_SSL
        if(sock.ssl){
            log_error1("Send error");
            log_ssl_error(sock.ssl, size);
        }
#endif
		return herror_new("hsocket_nsend", HSOCKET_ERROR_SEND, "Socket error: %d", errno);
    }
#endif
    n -= size;
	total += size;
    if (n<=0) break;
  }
  return H_OK;
}

/*--------------------------------------------------
FUNCTION: hsocket_send
----------------------------------------------------*/
herror_t
hsocket_send (hsocket_t sock, const char *str)
{
  return hsocket_nsend (sock, str, strlen (str));
}

/*
  return: -1 is error. read bytes otherwise
*/
herror_t
hsocket_read (hsocket_t sock, byte_t *buffer, int total, int force, int *received)
{
  int status;
  int totalRead;
#ifdef WIN32
  int wsa_error = 0;
#endif
  totalRead = 0;
/*
  log_verbose3("Entering hsocket_read(total=%d,force=%d)", total, force);
*/
  do {
#ifdef HAVE_SSL
    if(sock.ssl){
        struct timeval timeout;
        int i=0;
        fd_set fds;
        FD_ZERO (&fds);
        FD_SET (sock.sock, &fds);
        timeout.tv_sec = 10;
        timeout.tv_usec = 0;
#ifdef WIN32
#else
        fcntl( sock.sock, F_SETFL, O_NONBLOCK);
#endif
        //    log_verbose1("START READ LOOP");
        //do{
        //log_verbose2("DEBUG A %d",i);
        status = SSL_read(sock.ssl, &buffer[totalRead], total - totalRead);
        if(status < 1){
            int ret = select (sock.sock + 1, &fds, NULL, NULL, &timeout);
            //log_verbose2("DEBUG %d",ret);
#ifdef WIN32
			if (ret == SOCKET_ERROR) 
			{
				wsa_error = WSAGetLastError();
				log_error2("WSAGetLastError()=%d", wsa_error);
				return herror_new("hsocket_read", HSOCKET_ERROR_RECEIVE, "Socket error: %d", errno);
		      
			}
#endif
            if(ret==0){
                log_verbose1("Socket timeout");
                return herror_new("hsocket_read", HSOCKET_SSL_CLOSE, "Timeout");
            } else {
            //log_verbose1("DEBUG C");
            status = SSL_read(sock.ssl, &buffer[totalRead], total - totalRead);
            }
            //log_verbose3("DEBUG D char: %d status: %d", 
            //             buffer[totalRead], SSL_get_error(sock.ssl, status));
        }
        //} while( SSL_get_error(sock.ssl, status) == SSL_ERROR_WANT_READ);
#ifdef WIN32
#else
        fcntl( sock.sock, F_SETFL, 0);
#endif
    } else {
#else // HAVE_SSL
    {
#endif //HAVE_SSL
        status = recv(sock.sock, &buffer[totalRead], total - totalRead, 0);

#ifdef WIN32
        if (status == INVALID_SOCKET) 
        {
            wsa_error = WSAGetLastError();
            switch (wsa_error)
            {
              case WSAEWOULDBLOCK: 
             /* case WSAEALREADY:
              case WSAEINPROGRESS:        */
                 continue;
              default:
                 log_error2("WSAGetLastError()=%d", wsa_error);
                return herror_new("hsocket_read", HSOCKET_ERROR_RECEIVE, "Socket error: %d", errno);
            }
        }
    }
#else
    }
/*
 switch (errno) {
   case EWOULDBLOCK: 
   case EALREADY:
   case EINPROGRESS:
     return true;
   }
*/

#ifdef HAVE_SSL
    if( sock.ssl && status < 1 ){

        // XXX I'm not sure this err_syscall is right here...
        if( SSL_get_shutdown( sock.ssl ) == SSL_RECEIVED_SHUTDOWN ||
            SSL_get_error(sock.ssl, status) == SSL_ERROR_SYSCALL){
            *received = NULL;;
            return herror_new("hsocket_read", HSOCKET_SSL_CLOSE, "SSL Closed");
        }
        log_error2("Read error (%d)", status);
        log_ssl_error( sock.ssl, status );
        return herror_new("hsocket_read", HSOCKET_ERROR_RECEIVE, "SSL Error");
    }
#endif
    if (status == -1)
		return herror_new("hsocket_read", HSOCKET_ERROR_RECEIVE, "Socket error: %d", errno);
#endif
    
    if (!force) {
		*received = status;
		/*
		log_verbose3("Leaving !force (received=%d)(status=%d)", *received, status);
		*/
        return H_OK;
    }
    
    totalRead += status;

    if (totalRead == total) {
		*received = totalRead;
		/*
		log_verbose4("Leaving totalRead == total (received=%d)(status=%d)(totalRead=%d)", *received, status, totalRead);
		*/
        return H_OK;
    }
  } while (1);
}


herror_t
hsocket_block(hsocket_t sock, int block)
{
#ifdef WIN32
  unsigned long iMode;
#endif

  if (sock.sock <= 0)
	return herror_new("hsocket_block", HSOCKET_ERROR_NOT_INITIALIZED, 
	 "Called hsocket_listen() before initializing!");

#ifdef WIN32
/*#define HSOCKET_BLOCKMODE 0
#define HSOCKET_NONBLOCKMODE 1
*/

  iMode = (block==0)?1:0; /* Non block mode */
  if (ioctlsocket (sock.sock, FIONBIO, (u_long FAR *) & iMode) == INVALID_SOCKET)
  {
    int err = WSAGetLastError();
    log_error2 ("ioctlsocket error %d", err);
	return herror_new("hsocket_block", HSOCKET_ERROR_IOCTL, "Socket error: %d", err);
  }
#else /* fcntl(sock, F_SETFL, O_NONBLOCK); */
/* TODO (#1#): check for *nix the non blocking sockets */

#endif
  return H_OK;
}