connection.c 24.6 KB
Newer Older
Kurt Zeilenga's avatar
Kurt Zeilenga committed
1
2
3
4
5
/*
 * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */

Kurt Zeilenga's avatar
Kurt Zeilenga committed
6
#include "portable.h"
Kurt Zeilenga's avatar
Kurt Zeilenga committed
7
8
9

#include <stdio.h>

10
#include <ac/socket.h>
Kurt Zeilenga's avatar
Kurt Zeilenga committed
11
12
13
14
15
#include <ac/errno.h>
#include <ac/signal.h>
#include <ac/string.h>
#include <ac/time.h>

Kurt Zeilenga's avatar
Kurt Zeilenga committed
16
17
#include "slap.h"

Kurt Zeilenga's avatar
Kurt Zeilenga committed
18
19
20
/* we need LBER internals */
#include "../../libraries/liblber/lber-int.h"

21
22
23
/* protected by connections_mutex */
static ldap_pvt_thread_mutex_t connections_mutex;
static Connection *connections = NULL;
24
static unsigned long conn_nextid = 0;
25

26
/* structure state (protected by connections_mutex) */
27
28
29
#define SLAP_C_UNINITIALIZED	0x00	/* MUST BE ZERO (0) */
#define SLAP_C_UNUSED			0x01
#define SLAP_C_USED				0x02
30
31

/* connection state (protected by c_mutex ) */
32
33
34
35
36
#define SLAP_C_INVALID			0x00	/* MUST BE ZERO (0) */
#define SLAP_C_INACTIVE			0x01	/* zero threads */
#define SLAP_C_ACTIVE			0x02	/* one or more threads */
#define SLAP_C_BINDING			0x03	/* binding */
#define SLAP_C_CLOSING			0x04	/* closing */
37

38
39
40
41
42
43
44
45
46
47
48
49
char* connection_state2str( int state ) {
	switch( state ) {
	case SLAP_C_INVALID:	return "!";		
	case SLAP_C_INACTIVE:	return "|";		
	case SLAP_C_ACTIVE:		return "";			
	case SLAP_C_BINDING:	return "B";
	case SLAP_C_CLOSING:	return "C";			
	}

	return "?";
}

50
static Connection* connection_get( ber_socket_t s );
51
52

static int connection_input( Connection *c );
53
static void connection_close( Connection *c );
54

55
56
static int connection_op_activate( Connection *conn, Operation *op );
static int connection_resched( Connection *conn );
57
static void connection_abandon( Connection *conn );
58
static void connection_destroy( Connection *c );
59

Kurt Zeilenga's avatar
Kurt Zeilenga committed
60
61
62
63
64
struct co_arg {
	Connection	*co_conn;
	Operation	*co_op;
};

65
66
67
68
69
70
71
/*
 * Initialize connection management infrastructure.
 */
int connections_init(void)
{
	assert( connections == NULL );

72
	if( connections != NULL) {
73
74
75
76
77
78
79
80
81
82
83
84
		Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
			0, 0, 0 );
		return -1;
	}

	/* should check return of every call */
	ldap_pvt_thread_mutex_init( &connections_mutex );

	connections = (Connection *) calloc( dtblsize, sizeof(Connection) );

	if( connections == NULL ) {
		Debug( LDAP_DEBUG_ANY,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
85
			"connections_init: allocation (%d*%ld) of connection array failed\n",
86
87
88
89
			dtblsize, (long) sizeof(Connection), 0 );
		return -1;
	}

90
91
92
    assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
    assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );

93
94
95
96
97
98
99
100
	/*
	 * per entry initialization of the Connection array initialization
	 * will be done by connection_init()
	 */ 

	return 0;
}

101
102
103
104
105
/*
 * Destroy connection management infrastructure.
 */
int connections_destroy(void)
{
106
	ber_socket_t i;
107
108
109
110
111
112
113
114
115
116

	/* should check return of every call */

	if( connections == NULL) {
		Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
			0, 0, 0 );
		return -1;
	}

	for ( i = 0; i < dtblsize; i++ ) {
117
		if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
118
			ber_sockbuf_free( connections[i].c_sb );
119
120
121
122
			ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
			ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
			ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
		}
123
124
125
126
127
128
129
130
131
132
133
134
135
136
	}

	free( connections );
	connections = NULL;

	ldap_pvt_thread_mutex_destroy( &connections_mutex );
	return 0;
}

/*
 * shutdown all connections
 */
int connections_shutdown(void)
{
137
	ber_socket_t i;
138
139
140
141
142
143
144
145
146

	ldap_pvt_thread_mutex_lock( &connections_mutex );

	for ( i = 0; i < dtblsize; i++ ) {
		if( connections[i].c_struct_state != SLAP_C_USED ) {
			continue;
		}

		ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
147
148

		/* connections_mutex and c_mutex are locked */
149
150
		connection_closing( &connections[i] );
		connection_close( &connections[i] );
151

152
153
154
155
		ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
	}

	ldap_pvt_thread_mutex_unlock( &connections_mutex );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
156
157

	return 0;
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
/*
 * Timeout idle connections.
 */
int connections_timeout_idle(time_t now)
{
	int i = 0;
	int connindex;
	Connection* c;

	ldap_pvt_thread_mutex_lock( &connections_mutex );

 	for( c = connection_first( &connindex );
		c != NULL;
		c = connection_next( c, &connindex ) )
	{
		if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
			/* close it */
			connection_closing( c );
			connection_close( c );
			i++;
		}
	}
	connection_done( c );

	ldap_pvt_thread_mutex_unlock( &connections_mutex );

	return i;
}

189
static Connection* connection_get( ber_socket_t s )
190
{
191
192
	/* connections_mutex should be locked by caller */

193
194
195
	Connection *c;

	Debug( LDAP_DEBUG_ARGS,
196
197
		"connection_get(%ld)\n",
		(long) s, 0, 0 );
198
199
200

	assert( connections != NULL );

201
	if(s == AC_SOCKET_INVALID) {
202
203
204
205
206
		return NULL;
	}

#ifndef HAVE_WINSOCK
	c = &connections[s];
207

Kurt Zeilenga's avatar
Kurt Zeilenga committed
208
	assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
209

210
#else
211
	c = NULL;
212
	{
213
		ber_socket_t i;
214
215

		for(i=0; i<dtblsize; i++) {
Gary Williams's avatar
NT port    
Gary Williams committed
216
			if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
217
				assert( connections[i].c_conn_state == SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
218
				assert( connections[i].c_sb == 0 );
219
220
221
				break;
			}

Gary Williams's avatar
NT port    
Gary Williams committed
222
			if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
223
				assert( connections[i].c_conn_state == SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
224
				assert( !ber_pvt_sb_in_use( connections[i].c_sb ) );
225
226
227
				continue;
			}

228
229
230
			/* state can actually change from used -> unused by resched,
			 * so don't assert details here.
			 */
231

Kurt Zeilenga's avatar
Kurt Zeilenga committed
232
			if( ber_pvt_sb_get_desc( connections[i].c_sb ) == s ) {
Gary Williams's avatar
NT port    
Gary Williams committed
233
				c = &connections[i];
234
235
236
237
238
				break;
			}
		}
	}
#endif
239

240
	if( c != NULL ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
241
242
		ldap_pvt_thread_mutex_lock( &c->c_mutex );

243
244
		if( c->c_struct_state != SLAP_C_USED ) {
			/* connection must have been closed due to resched */
245

246
247
248
249
			assert( c->c_conn_state == SLAP_C_INVALID );
			assert( !ber_pvt_sb_in_use( c->c_sb ) );

			Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
250
251
				"connection_get(%d): connection not used\n",
				s, 0, 0 );
252

253
			ldap_pvt_thread_mutex_unlock( &c->c_mutex );
254
255
256
			return NULL;
		}

257
258
259
		Debug( LDAP_DEBUG_TRACE,
			"connection_get(%d): got connid=%ld\n",
			s, c->c_connid, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
260

261
262
		c->c_n_get++;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
263
264
265
		assert( c->c_struct_state == SLAP_C_USED );
		assert( c->c_conn_state != SLAP_C_INVALID );
		assert( ber_pvt_sb_in_use( c->c_sb ) );
266
267

    	c->c_activitytime = slap_get_time();
268
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
269

270
271
272
273
274
275
276
277
278
	return c;
}

static void connection_return( Connection *c )
{
	ldap_pvt_thread_mutex_unlock( &c->c_mutex );
}

long connection_init(
279
	ber_socket_t s,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
280
281
282
283
	const char* url,
	const char* dnsname,
	const char* peername,
	const char* sockname,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
284
	int use_tls )
285
{
286
	unsigned long id;
287
	Connection *c;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
288

289
290
	assert( connections != NULL );

Kurt Zeilenga's avatar
Kurt Zeilenga committed
291
292
293
294
	assert( dnsname != NULL );
	assert( peername != NULL );
	assert( sockname != NULL );

Kurt Zeilenga's avatar
Kurt Zeilenga committed
295
296
297
298
#ifndef HAVE_TLS
	assert( !use_tls );
#endif

299
	if( s == AC_SOCKET_INVALID ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
300
        Debug( LDAP_DEBUG_ANY,
301
302
			"connection_init(%ld): invalid.\n",
			(long) s, 0, 0 );
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
		return -1;
	}

	assert( s >= 0 );
#ifndef HAVE_WINSOCK
	assert( s < dtblsize );
#endif

	ldap_pvt_thread_mutex_lock( &connections_mutex );

#ifndef HAVE_WINSOCK
	c = &connections[s];

#else
	{
318
		unsigned int i;
319

320
321
		c = NULL;

Gary Williams's avatar
NT port    
Gary Williams committed
322
323
        for( i=0; i < dtblsize; i++) {
            if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
324
                assert( connections[i].c_sb == 0 );
Gary Williams's avatar
NT port    
Gary Williams committed
325
326
327
328
329
                c = &connections[i];
                break;
            }

            if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
330
                assert( !ber_pvt_sb_in_use( connections[i].c_sb ));
Gary Williams's avatar
NT port    
Gary Williams committed
331
332
333
334
335
336
                c = &connections[i];
                break;
            }

            assert( connections[i].c_struct_state == SLAP_C_USED );
            assert( connections[i].c_conn_state != SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
337
            assert( ber_pvt_sb_in_use( connections[i].c_sb ));
Gary Williams's avatar
NT port    
Gary Williams committed
338
339
340
        }

        if( c == NULL ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
341
        	Debug( LDAP_DEBUG_ANY,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
342
				"connection_init(%d): connection table full (%d/%d)\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
343
				s, i, dtblsize);
Gary Williams's avatar
NT port    
Gary Williams committed
344
345
346
347
            ldap_pvt_thread_mutex_unlock( &connections_mutex );
            return -1;
        }
    }
348
349
#endif

Gary Williams's avatar
NT port    
Gary Williams committed
350
    assert( c != NULL );
351

Gary Williams's avatar
NT port    
Gary Williams committed
352
353
354
    if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
        c->c_dn = NULL;
        c->c_cdn = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
355
356
357
358
359
360

		c->c_listener_url = NULL;
		c->c_peer_domain = NULL;
        c->c_peer_name = NULL;
        c->c_sock_name = NULL;

Gary Williams's avatar
NT port    
Gary Williams committed
361
362
        c->c_ops = NULL;
        c->c_pending_ops = NULL;
363
364
		c->c_authmech = NULL;
		c->c_authstate = NULL;
365

366
367
368
369
#ifdef HAVE_CYRUS_SASL
		c->c_sasl_context = NULL;
#endif

Kurt Zeilenga's avatar
Kurt Zeilenga committed
370
        c->c_sb = ber_sockbuf_alloc( );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
371
		c->c_currentber = NULL;
372

Gary Williams's avatar
NT port    
Gary Williams committed
373
374
375
376
        /* should check status of thread calls */
        ldap_pvt_thread_mutex_init( &c->c_mutex );
        ldap_pvt_thread_mutex_init( &c->c_write_mutex );
        ldap_pvt_thread_cond_init( &c->c_write_cv );
377

Gary Williams's avatar
NT port    
Gary Williams committed
378
379
        c->c_struct_state = SLAP_C_UNUSED;
    }
380

Gary Williams's avatar
NT port    
Gary Williams committed
381
    ldap_pvt_thread_mutex_lock( &c->c_mutex );
382

Gary Williams's avatar
NT port    
Gary Williams committed
383
384
385
    assert( c->c_struct_state == SLAP_C_UNUSED );
    assert(	c->c_dn == NULL );
    assert(	c->c_cdn == NULL );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
386
387
388
389
    assert( c->c_listener_url == NULL );
    assert( c->c_peer_domain == NULL );
    assert( c->c_peer_name == NULL );
    assert( c->c_sock_name == NULL );
Gary Williams's avatar
NT port    
Gary Williams committed
390
391
    assert( c->c_ops == NULL );
    assert( c->c_pending_ops == NULL );
392
393
	assert( c->c_authmech == NULL );
	assert( c->c_authstate == NULL );
394
395
396
#ifdef HAVE_CYRUS_SASL
	assert( c->c_sasl_context == NULL );
#endif
Kurt Zeilenga's avatar
Kurt Zeilenga committed
397
	assert( c->c_currentber == NULL );
398

Kurt Zeilenga's avatar
Kurt Zeilenga committed
399
400
401
402
	c->c_listener_url = ch_strdup( url  );
	c->c_peer_domain = ch_strdup( dnsname  );
    c->c_peer_name = ch_strdup( peername  );
    c->c_sock_name = ch_strdup( sockname );
403

Gary Williams's avatar
NT port    
Gary Williams committed
404
405
406
407
    c->c_n_ops_received = 0;
    c->c_n_ops_executing = 0;
    c->c_n_ops_pending = 0;
    c->c_n_ops_completed = 0;
408
409
410
411

	c->c_n_get = 0;
	c->c_n_read = 0;
	c->c_n_write = 0;
412

Kurt Zeilenga's avatar
Kurt Zeilenga committed
413
414
415
	/* assume LDAPv3 until bind */
	c->c_protocol = LDAP_VERSION3;

416
    c->c_activitytime = c->c_starttime = slap_get_time();
417

Kurt Zeilenga's avatar
Kurt Zeilenga committed
418
419
    ber_pvt_sb_set_desc( c->c_sb, s );
    ber_pvt_sb_set_io( c->c_sb, &ber_pvt_sb_io_tcp, NULL );
420

Kurt Zeilenga's avatar
Kurt Zeilenga committed
421
    if( ber_pvt_sb_set_nonblock( c->c_sb, 1 ) < 0 ) {
Gary Williams's avatar
NT port    
Gary Williams committed
422
        Debug( LDAP_DEBUG_ANY,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
423
424
            "connection_init(%d, %s): set nonblocking failed\n",
            s, c->c_peer_name,0 );
Gary Williams's avatar
NT port    
Gary Williams committed
425
    }
426

Gary Williams's avatar
NT port    
Gary Williams committed
427
    id = c->c_connid = conn_nextid++;
428

Gary Williams's avatar
NT port    
Gary Williams committed
429
430
    c->c_conn_state = SLAP_C_INACTIVE;
    c->c_struct_state = SLAP_C_USED;
431

Kurt Zeilenga's avatar
Kurt Zeilenga committed
432
#ifdef HAVE_TLS
433
    if ( use_tls ) {
434
435
	    c->c_is_tls = 1;
	    c->c_needs_tls_accept = 1;
436
    }
Kurt Zeilenga's avatar
Kurt Zeilenga committed
437
#endif
438

Gary Williams's avatar
NT port    
Gary Williams committed
439
440
    ldap_pvt_thread_mutex_unlock( &c->c_mutex );
    ldap_pvt_thread_mutex_unlock( &connections_mutex );
441

442
443
    backend_connection_init(c);

Gary Williams's avatar
NT port    
Gary Williams committed
444
    return id;
445
446
447
448
449
}

static void
connection_destroy( Connection *c )
{
450
451
	/* note: connections_mutex should be locked by caller */

Gary Williams's avatar
NT port    
Gary Williams committed
452
453
454
455
456
    assert( connections != NULL );
    assert( c != NULL );
    assert( c->c_struct_state != SLAP_C_UNUSED );
    assert( c->c_conn_state != SLAP_C_INVALID );
    assert( c->c_ops == NULL );
457

458
459
    backend_connection_destroy(c);

Gary Williams's avatar
NT port    
Gary Williams committed
460
    c->c_protocol = 0;
461
    c->c_connid = -1;
462

463
    c->c_activitytime = c->c_starttime = 0;
464

Gary Williams's avatar
NT port    
Gary Williams committed
465
466
467
468
    if(c->c_dn != NULL) {
        free(c->c_dn);
        c->c_dn = NULL;
    }
469
470
471
472
	if(c->c_cdn != NULL) {
		free(c->c_cdn);
		c->c_cdn = NULL;
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
473
474
475
476
477
478
479
480
481
482
483
	if(c->c_listener_url != NULL) {
		free(c->c_listener_url);
		c->c_listener_url = NULL;
	}
	if(c->c_peer_domain != NULL) {
		free(c->c_peer_domain);
		c->c_peer_domain = NULL;
	}
	if(c->c_peer_name != NULL) {
		free(c->c_peer_name);
		c->c_peer_name = NULL;
484
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
485
486
487
	if(c->c_sock_name != NULL) {
		free(c->c_sock_name);
		c->c_sock_name = NULL;
488
	}
489
490
491
492
493
494
495
496
	if(c->c_authmech != NULL ) {
		free(c->c_authmech);
		c->c_authmech = NULL;
	}
	if(c->c_authstate != NULL ) {
		free(c->c_authstate);
		c->c_authstate = NULL;
	}
497

498
499
500
501
502
503
504
#ifdef HAVE_CYRUS_SASL
	if(c->c_sasl_context != NULL ) {
		sasl_dispose( &c->c_sasl_context );
		c->c_sasl_context = NULL;
	}
#endif

Kurt Zeilenga's avatar
Kurt Zeilenga committed
505
506
507
508
509
	if ( c->c_currentber != NULL ) {
		ber_free( c->c_currentber, 1 );
		c->c_currentber = NULL;
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
510
511
	if ( ber_pvt_sb_in_use(c->c_sb) ) {
		int sd = ber_pvt_sb_get_desc(c->c_sb);
512

513
		slapd_remove( sd, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
514
	   	ber_pvt_sb_close( c->c_sb );
515
516

		Statslog( LDAP_DEBUG_STATS,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
517
		    "conn=%ld fd=%d closed\n",
518
519
520
			c->c_connid, sd, 0, 0, 0 );
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
521
   	ber_pvt_sb_destroy( c->c_sb );
522
523
524

    c->c_conn_state = SLAP_C_INVALID;
    c->c_struct_state = SLAP_C_UNUSED;
525
526
}

527
528
int connection_state_closing( Connection *c )
{
529
530
	/* c_mutex must be locked by caller */

531
	int state;
532
533
534
	assert( c != NULL );
	assert( c->c_struct_state == SLAP_C_USED );

535
536
537
538
539
	state = c->c_conn_state;

	assert( state != SLAP_C_INVALID );

	return state == SLAP_C_CLOSING;
540
541
}

542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
static void connection_abandon( Connection *c )
{
	/* c_mutex must be locked by caller */

	Operation *o;

	for( o = c->c_ops; o != NULL; o = o->o_next ) {
		ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
		o->o_abandon = 1;
		ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
	}

	/* remove pending operations */
	for( o = slap_op_pop( &c->c_pending_ops );
		o != NULL;
		o = slap_op_pop( &c->c_pending_ops ) )
	{
		slap_op_free( o );
	}
}

563
564
565
566
567
568
569
void connection_closing( Connection *c )
{
	assert( connections != NULL );
	assert( c != NULL );
	assert( c->c_struct_state == SLAP_C_USED );
	assert( c->c_conn_state != SLAP_C_INVALID );

570
571
	/* c_mutex must be locked by caller */

572
	if( c->c_conn_state != SLAP_C_CLOSING ) {
573
574

		Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
575
			"connection_closing: readying conn=%ld sd=%d for close\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
576
			c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
577

Kurt Zeilenga's avatar
Kurt Zeilenga committed
578
579
580
		/* update state to closing */
		c->c_conn_state = SLAP_C_CLOSING;

581
		/* don't listen on this port anymore */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
582
		slapd_clr_read( ber_pvt_sb_get_desc( c->c_sb ), 1 );
583
584
585
586

		/* shutdown I/O -- not yet implemented */

		/* abandon active operations */
587
		connection_abandon( c );
588
589

		/* wake write blocked operations */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
590
		slapd_clr_write( ber_pvt_sb_get_desc(c->c_sb), 1 );
591
		ldap_pvt_thread_cond_signal( &c->c_write_cv );
592
593
594
	}
}

595
596
597
598
599
600
601
static void connection_close( Connection *c )
{
	assert( connections != NULL );
	assert( c != NULL );
	assert( c->c_struct_state == SLAP_C_USED );
	assert( c->c_conn_state == SLAP_C_CLOSING );

602
	/* note: connections_mutex and c_mutex should be locked by caller */
603

604
605
	if( c->c_ops != NULL ) {
		Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
606
			"connection_close: deferring conn=%ld sd=%d\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
607
			c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
608
609
610
611

		return;
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
612
	Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
613
		c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
614
615
616
617

	connection_destroy( c );
}

618
unsigned long connections_nextid(void)
619
{
620
	unsigned long id;
621
622
623
624
625
626
627
628
629
630
631
	assert( connections != NULL );

	ldap_pvt_thread_mutex_lock( &connections_mutex );

	id = conn_nextid;

	ldap_pvt_thread_mutex_unlock( &connections_mutex );

	return id;
}

632
Connection* connection_first( ber_socket_t *index )
633
634
{
	assert( connections != NULL );
635
	assert( index != NULL );
636
637
638

	ldap_pvt_thread_mutex_lock( &connections_mutex );

639
	*index = 0;
640

641
	return connection_next(NULL, index);
642
643
}

644
Connection* connection_next( Connection *c, ber_socket_t *index )
645
646
{
	assert( connections != NULL );
647
648
	assert( index != NULL );
	assert( *index <= dtblsize );
649
650
651
652
653
654
655

	if( c != NULL ) {
		ldap_pvt_thread_mutex_unlock( &c->c_mutex );
	}

	c = NULL;

656
657
658
	for(; *index < dtblsize; (*index)++) {
		if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
			assert( connections[*index].c_conn_state == SLAP_C_INVALID );
659
660
661
662
663
664
665
#ifndef HAVE_WINSOCK
			continue;
#else
			break;
#endif
		}

666
667
668
		if( connections[*index].c_struct_state == SLAP_C_USED ) {
			assert( connections[*index].c_conn_state != SLAP_C_INVALID );
			c = &connections[(*index)++];
669
670
671
			break;
		}

672
673
		assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
		assert( connections[*index].c_conn_state == SLAP_C_INVALID );
674
675
676
677
678
679
680
681
682
	}

	if( c != NULL ) {
		ldap_pvt_thread_mutex_lock( &c->c_mutex );
	}

	return c;
}

683
void connection_done( Connection *c )
684
685
686
687
688
689
690
691
692
693
{
	assert( connections != NULL );

	if( c != NULL ) {
		ldap_pvt_thread_mutex_unlock( &c->c_mutex );
	}

	ldap_pvt_thread_mutex_unlock( &connections_mutex );
}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
694
695
696
697
698
699
/*
 * connection_activity - handle the request operation op on connection
 * conn.  This routine figures out what kind of operation it is and
 * calls the appropriate stub to handle it.
 */

700
701
static void *
connection_operation( void *arg_v )
Kurt Zeilenga's avatar
Kurt Zeilenga committed
702
{
703
	int rc;
704
	struct co_arg	*arg = arg_v;
705
	ber_tag_t tag = arg->co_op->o_tag;
706
	Connection *conn = arg->co_conn;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
707

Kurt Zeilenga's avatar
Kurt Zeilenga committed
708
709
710
	ldap_pvt_thread_mutex_lock( &num_ops_mutex );
	num_ops_initiated++;
	ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
711

712
	switch ( tag ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
713
	case LDAP_REQ_BIND:
714
		rc = do_bind( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
715
716
717
		break;

	case LDAP_REQ_UNBIND:
718
		rc = do_unbind( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
719
720
721
		break;

	case LDAP_REQ_ADD:
722
		rc = do_add( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
723
724
725
		break;

	case LDAP_REQ_DELETE:
726
		rc = do_delete( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
727
728
729
		break;

	case LDAP_REQ_MODRDN:
730
		rc = do_modrdn( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
731
732
733
		break;

	case LDAP_REQ_MODIFY:
734
		rc = do_modify( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
735
736
737
		break;

	case LDAP_REQ_COMPARE:
738
		rc = do_compare( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
739
740
741
		break;

	case LDAP_REQ_SEARCH:
742
		rc = do_search( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
743
744
745
		break;

	case LDAP_REQ_ABANDON:
746
		rc = do_abandon( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
747
748
		break;

749
	case LDAP_REQ_EXTENDED:
750
		rc = do_extended( conn, arg->co_op );
751
752
		break;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
753
	default:
754
755
756
757
758
759
		Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
		    tag, 0, 0 );
		arg->co_op->o_tag = LBER_ERROR;
		send_ldap_disconnect( conn, arg->co_op,
			LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
		rc = -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
760
761
762
		break;
	}

763
764
	if( rc == -1 ) tag = LBER_ERROR;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
765
766
767
	ldap_pvt_thread_mutex_lock( &num_ops_mutex );
	num_ops_completed++;
	ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
768
769

	ldap_pvt_thread_mutex_lock( &conn->c_mutex );
770

771
	conn->c_n_ops_executing--;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
772
	conn->c_n_ops_completed++;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
773

774
775
776
	slap_op_remove( &conn->c_ops, arg->co_op );
	slap_op_free( arg->co_op );
	arg->co_op = NULL;
777
	arg->co_conn = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
778
	free( (char *) arg );
779
	arg = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
780

781
	switch( tag ) {
782
	case LBER_ERROR:
783
	case LDAP_REQ_UNBIND:
784
		/* c_mutex is locked */
785
		connection_closing( conn );
786
787
788
789
790
791
		break;

	case LDAP_REQ_BIND:
		if( conn->c_conn_state == SLAP_C_BINDING) {
			conn->c_conn_state = SLAP_C_ACTIVE;
		}
792
		conn->c_bind_in_progress = ( rc == LDAP_SASL_BIND_IN_PROGRESS );
793
794
	}

795
	ldap_pvt_thread_mutex_lock( &active_threads_mutex );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
796
	active_threads--;
797
	if( active_threads < 1 ) {
798
		ldap_pvt_thread_cond_signal(&active_threads_cond);
799
	}
800
	ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
801
802
803

	connection_resched( conn );

804
805
	ldap_pvt_thread_mutex_unlock( &conn->c_mutex );

806
	return NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
807
808
}

809
int connection_read(ber_socket_t s)
810
811
812
813
814
815
816
{
	int rc = 0;
	Connection *c;
	assert( connections != NULL );

	ldap_pvt_thread_mutex_lock( &connections_mutex );

817
	/* get (locked) connection */
818
	c = connection_get( s );
819

820
821
	if( c == NULL ) {
		Debug( LDAP_DEBUG_ANY,
822
823
			"connection_read(%ld): no connection!\n",
			(long) s, 0, 0 );
824
825
826

		slapd_remove(s, 0);

827
		ldap_pvt_thread_mutex_unlock( &connections_mutex );
828
829
830
		return -1;
	}

831
832
	c->c_n_read++;

833
834
835
836
837
838
839
840
841
842
	if( c->c_conn_state == SLAP_C_CLOSING ) {
		Debug( LDAP_DEBUG_TRACE,
			"connection_read(%d): closing, ignoring input for id=%ld\n",
			s, c->c_connid, 0 );

		connection_return( c );
		ldap_pvt_thread_mutex_unlock( &connections_mutex );
		return 0;
	}

843
844
845
846
	Debug( LDAP_DEBUG_TRACE,
		"connection_read(%d): checking for input on id=%ld\n",
		s, c->c_connid, 0 );

847
848
849
850
851
#ifdef HAVE_TLS
	if ( c->c_is_tls && c->c_needs_tls_accept ) {
		rc = ldap_pvt_tls_accept( c->c_sb, NULL );
		if ( rc < 0 ) {
			Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
852
			       "connection_read(%d): TLS accept error error=%d id=%ld, closing\n",
853
854
			       s, rc, c->c_connid );

855
			c->c_needs_tls_accept = 0;
856
857
858
859
860
861
862
863
864
865
866
867
			/* connections_mutex and c_mutex are locked */
			connection_closing( c );
			connection_close( c );
		} else if ( rc == 0 ) {
			c->c_needs_tls_accept = 0;
		}
		connection_return( c );
		ldap_pvt_thread_mutex_unlock( &connections_mutex );
		return 0;
	}
#endif

868
869
870
#define CONNECTION_INPUT_LOOP 1

#ifdef DATA_READY_LOOP
Julio Sánchez Fernández's avatar
   
Julio Sánchez Fernández committed
871
	while(!rc && ber_pvt_sb_data_ready(&c->c_sb))
872
#elif CONNECTION_INPUT_LOOP
Julio Sánchez Fernández's avatar
   
Julio Sánchez Fernández committed
873
	while(!rc)
874
875
#endif
	{
Julio Sánchez Fernández's avatar
   
Julio Sánchez Fernández committed
876
		/* How do we do this without getting into a busy loop ? */
877
878
879
880
881
		rc = connection_input( c );
	}

	if( rc < 0 ) {
		Debug( LDAP_DEBUG_TRACE,
882
883
			"connection_read(%d): input error=%d id=%ld, closing.\n",
			s, rc, c->c_connid );
884

885
		/* connections_mutex and c_mutex are locked */
886
		connection_closing( c );
887
888
889
		connection_close( c );
	}

890
891
892
893
	if ( ber_pvt_sb_needs_read( c->c_sb ) )
		slapd_set_read( s, 1 );
	if ( ber_pvt_sb_needs_write( c->c_sb ) )
		slapd_set_write( s, 1 );
894
895
896
897
898
899
900
	connection_return( c );
	ldap_pvt_thread_mutex_unlock( &connections_mutex );
	return 0;
}

static int
connection_input(
Kurt Zeilenga's avatar
Kurt Zeilenga committed
901
902
903
    Connection *conn
)
{
904
	Operation *op;
905
906
907
	ber_tag_t	tag;
	ber_len_t	len;
	ber_int_t	msgid;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
908
909
910
911
912
	BerElement	*ber;

	if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
	    == NULL ) {
		Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
913
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
914
915
916
	}

	errno = 0;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
917
	if ( (tag = ber_get_next( conn->c_sb, &len, conn->c_currentber ))
918
919
	    != LDAP_TAG_MESSAGE )
	{
920
921
		int err = errno;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
922
		Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
923
			"ber_get_next on fd %d failed errno=%d (%s)\n",
924
			ber_pvt_sb_get_desc( conn->c_sb ), err, STRERROR(err) );
925
926
		Debug( LDAP_DEBUG_TRACE,
			"\t*** got %ld of %lu so far\n",
927
928
			(long)(conn->c_currentber->ber_rwptr - conn->c_currentber->ber_buf),
			conn->c_currentber->ber_len, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
929

930
		if ( err != EWOULDBLOCK && err != EAGAIN ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
931
932
933
934
			/* log, close and send error */
			ber_free( conn->c_currentber, 1 );
			conn->c_currentber = NULL;

935
			return -2;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
936
		}
937
		return 1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
938
	}
939

Kurt Zeilenga's avatar
Kurt Zeilenga committed
940
941
942
943
944
	ber = conn->c_currentber;
	conn->c_currentber = NULL;

	if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
		/* log, close and send error */
945
		Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
946
947
		    0 );
		ber_free( ber, 1 );
948
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
949
950
951
952
	}

	if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
		/* log, close and send error */
953
		Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
954
955
956
		    0 );
		ber_free( ber, 1 );

957
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
958
959
	}

960
961
962
963
964
	if(tag == LDAP_REQ_BIND) {
		/* immediately abandon all exiting operations upon BIND */
		connection_abandon( conn );
	}

965
	op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
966

967
968
969
	if ( conn->c_conn_state == SLAP_C_BINDING
		|| conn->c_conn_state == SLAP_C_CLOSING )
	{
970
		Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
971
		conn->c_n_ops_pending++;
972
		slap_op_add( &conn->c_pending_ops, op );
973

974
	} else {
975
		conn->c_n_ops_executing++;
976
977
		connection_op_activate( conn, op );
	}
978

979
980
981
982
#ifdef NO_THREADS
	if ( conn->c_struct_state != SLAP_C_USED ) {
		/* connection must have got closed underneath us */
		return 1;
983
	}
984
985
#endif
	assert( conn->c_struct_state == SLAP_C_USED );
986

987
	return 0;
988
989
990
991
992
993
994
}

static int
connection_resched( Connection *conn )
{
	Operation *op;

995
996
	if( conn->c_conn_state == SLAP_C_CLOSING ) {
		Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
997
			"connection_resched: attempting closing conn=%ld sd=%d\n",
998
999
1000
1001
1002
1003
			conn->c_connid, ber_pvt_sb_get_desc( conn->c_sb ), 0 );

		connection_close( conn );
		return 0;
	}

1004
	if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1005
		/* other states need different handling */
Gary Williams's avatar
NT port    
Gary Williams committed
1006
		return 0;
1007
1008
1009
1010
1011
1012
	}

	for( op = slap_op_pop( &conn->c_pending_ops );
		op != NULL;
		op = slap_op_pop( &conn->c_pending_ops ) )
	{
1013
1014
1015
		/* pending operations should not be marked for abandonment */
		assert(!op->o_abandon);

1016
1017
1018
		conn->c_n_ops_pending--;
		conn->c_n_ops_executing++;

1019
1020
		connection_op_activate( conn, op );

1021
		if ( conn->c_conn_state == SLAP_C_BINDING ) {
1022
1023
1024
			break;
		}
	}
Gary Williams's avatar
NT port    
Gary Williams committed
1025
	return 0;
1026
1027
1028
1029
1030
1031
1032
}

static int connection_op_activate( Connection *conn, Operation *op )
{
	struct co_arg *arg;
	char *tmpdn;
	int status;
1033
	ber_tag_t tag = op->o_tag;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
1034

1035
1036
1037
1038
	if(tag == LDAP_REQ_BIND) {
		conn->c_conn_state = SLAP_C_BINDING;
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
1039
	if ( conn->c_dn != NULL ) {
1040
		tmpdn = ch_strdup( conn->c_dn );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
1041
1042
1043
1044
	} else {
		tmpdn = NULL;
	}

1045
1046
1047
1048
	arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
	arg->co_conn = conn;
	arg->co_op = op;

1049
1050
	arg->co_op->o_bind_in_progress = conn->c_bind_in_progress;

1051
	arg->co_op->o_dn = ch_strdup( tmpdn != NULL ? tmpdn : "" );
1052
1053
	arg->co_op->o_ndn = ch_strdup( arg->co_op->o_dn );
	(void) dn_normalize_case( arg->co_op->o_ndn );