connection.c 25.8 KB
Newer Older
1
/* $OpenLDAP$ */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
2
/*
Kurt Zeilenga's avatar
Kurt Zeilenga committed
3
 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
Kurt Zeilenga's avatar
Kurt Zeilenga committed
4
5
6
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */

Kurt Zeilenga's avatar
Kurt Zeilenga committed
7
#include "portable.h"
Kurt Zeilenga's avatar
Kurt Zeilenga committed
8
9
10

#include <stdio.h>

11
#include <ac/socket.h>
Kurt Zeilenga's avatar
Kurt Zeilenga committed
12
13
14
15
16
#include <ac/errno.h>
#include <ac/signal.h>
#include <ac/string.h>
#include <ac/time.h>

Kurt Zeilenga's avatar
Kurt Zeilenga committed
17
18
#include "slap.h"

Kurt Zeilenga's avatar
Kurt Zeilenga committed
19
20
21
/* we need LBER internals */
#include "../../libraries/liblber/lber-int.h"

22
23
24
/* protected by connections_mutex */
static ldap_pvt_thread_mutex_t connections_mutex;
static Connection *connections = NULL;
25
static unsigned long conn_nextid = 0;
26

27
/* structure state (protected by connections_mutex) */
28
29
30
#define SLAP_C_UNINITIALIZED	0x00	/* MUST BE ZERO (0) */
#define SLAP_C_UNUSED			0x01
#define SLAP_C_USED				0x02
31
32

/* connection state (protected by c_mutex ) */
33
34
35
36
37
#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 */
38

39
40
41
const char *
connection_state2str( int state )
{
42
43
44
45
46
47
48
49
50
51
52
	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 "?";
}

53
static Connection* connection_get( ber_socket_t s );
54
55

static int connection_input( Connection *c );
56
static void connection_close( Connection *c );
57

58
59
static int connection_op_activate( Connection *conn, Operation *op );
static int connection_resched( Connection *conn );
60
static void connection_abandon( Connection *conn );
61
static void connection_destroy( Connection *c );
62

Kurt Zeilenga's avatar
Kurt Zeilenga committed
63
64
65
66
67
struct co_arg {
	Connection	*co_conn;
	Operation	*co_op;
};

68
69
70
71
72
73
74
/*
 * Initialize connection management infrastructure.
 */
int connections_init(void)
{
	assert( connections == NULL );

75
	if( connections != NULL) {
76
77
78
79
80
81
82
83
84
85
86
87
		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
88
			"connections_init: allocation (%d*%ld) of connection array failed\n",
89
90
91
92
			dtblsize, (long) sizeof(Connection), 0 );
		return -1;
	}

93
94
95
    assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
    assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );

96
97
98
99
100
101
102
103
	/*
	 * per entry initialization of the Connection array initialization
	 * will be done by connection_init()
	 */ 

	return 0;
}

104
105
106
107
108
/*
 * Destroy connection management infrastructure.
 */
int connections_destroy(void)
{
109
	ber_socket_t i;
110
111
112
113
114
115
116
117
118
119

	/* 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++ ) {
120
		if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
121
			ber_sockbuf_free( connections[i].c_sb );
122
123
124
125
			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 );
		}
126
127
128
129
130
131
132
133
134
135
136
137
138
139
	}

	free( connections );
	connections = NULL;

	ldap_pvt_thread_mutex_destroy( &connections_mutex );
	return 0;
}

/*
 * shutdown all connections
 */
int connections_shutdown(void)
{
140
	ber_socket_t i;
141
142
143
144
145
146
147
148
149

	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 );
150
151

		/* connections_mutex and c_mutex are locked */
152
153
		connection_closing( &connections[i] );
		connection_close( &connections[i] );
154

155
156
157
158
		ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
	}

	ldap_pvt_thread_mutex_unlock( &connections_mutex );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
159
160

	return 0;
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
/*
 * 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;
}

192
static Connection* connection_get( ber_socket_t s )
193
{
194
195
	/* connections_mutex should be locked by caller */

196
197
198
	Connection *c;

	Debug( LDAP_DEBUG_ARGS,
199
200
		"connection_get(%ld)\n",
		(long) s, 0, 0 );
201
202
203

	assert( connections != NULL );

204
	if(s == AC_SOCKET_INVALID) {
205
206
207
208
209
		return NULL;
	}

#ifndef HAVE_WINSOCK
	c = &connections[s];
210

Kurt Zeilenga's avatar
Kurt Zeilenga committed
211
	assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
212

213
#else
214
	c = NULL;
215
	{
216
		ber_socket_t i;
217
218

		for(i=0; i<dtblsize; i++) {
Gary Williams's avatar
NT port    
Gary Williams committed
219
			if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
220
				assert( connections[i].c_conn_state == SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
221
				assert( connections[i].c_sb == 0 );
222
223
224
				break;
			}

Gary Williams's avatar
NT port    
Gary Williams committed
225
			if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
226
				assert( connections[i].c_conn_state == SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
227
				assert( !ber_pvt_sb_in_use( connections[i].c_sb ) );
228
229
230
				continue;
			}

231
232
233
			/* state can actually change from used -> unused by resched,
			 * so don't assert details here.
			 */
234

Kurt Zeilenga's avatar
Kurt Zeilenga committed
235
			if( ber_pvt_sb_get_desc( connections[i].c_sb ) == s ) {
Gary Williams's avatar
NT port    
Gary Williams committed
236
				c = &connections[i];
237
238
239
240
241
				break;
			}
		}
	}
#endif
242

243
	if( c != NULL ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
244
245
		ldap_pvt_thread_mutex_lock( &c->c_mutex );

246
247
		if( c->c_struct_state != SLAP_C_USED ) {
			/* connection must have been closed due to resched */
248

249
250
251
252
			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
253
254
				"connection_get(%d): connection not used\n",
				s, 0, 0 );
255

256
			ldap_pvt_thread_mutex_unlock( &c->c_mutex );
257
258
259
			return NULL;
		}

260
261
262
		Debug( LDAP_DEBUG_TRACE,
			"connection_get(%d): got connid=%ld\n",
			s, c->c_connid, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
263

264
265
		c->c_n_get++;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
266
267
268
		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 ) );
269
270

    	c->c_activitytime = slap_get_time();
271
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
272

273
274
275
276
277
278
279
280
281
	return c;
}

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

long connection_init(
282
	ber_socket_t s,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
283
284
285
286
	const char* url,
	const char* dnsname,
	const char* peername,
	const char* sockname,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
287
	int use_tls )
288
{
289
	unsigned long id;
290
	Connection *c;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
291

292
293
	assert( connections != NULL );

Kurt Zeilenga's avatar
Kurt Zeilenga committed
294
295
296
297
	assert( dnsname != NULL );
	assert( peername != NULL );
	assert( sockname != NULL );

Kurt Zeilenga's avatar
Kurt Zeilenga committed
298
299
300
301
#ifndef HAVE_TLS
	assert( !use_tls );
#endif

302
	if( s == AC_SOCKET_INVALID ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
303
        Debug( LDAP_DEBUG_ANY,
304
305
			"connection_init(%ld): invalid.\n",
			(long) s, 0, 0 );
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
		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
	{
321
		unsigned int i;
322

323
324
		c = NULL;

Gary Williams's avatar
NT port    
Gary Williams committed
325
326
        for( i=0; i < dtblsize; i++) {
            if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
327
                assert( connections[i].c_sb == 0 );
Gary Williams's avatar
NT port    
Gary Williams committed
328
329
330
331
332
                c = &connections[i];
                break;
            }

            if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
333
                assert( !ber_pvt_sb_in_use( connections[i].c_sb ));
Gary Williams's avatar
NT port    
Gary Williams committed
334
335
336
337
338
339
                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
340
            assert( ber_pvt_sb_in_use( connections[i].c_sb ));
Gary Williams's avatar
NT port    
Gary Williams committed
341
342
343
        }

        if( c == NULL ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
344
        	Debug( LDAP_DEBUG_ANY,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
345
				"connection_init(%d): connection table full (%d/%d)\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
346
				s, i, dtblsize);
Gary Williams's avatar
NT port    
Gary Williams committed
347
348
349
350
            ldap_pvt_thread_mutex_unlock( &connections_mutex );
            return -1;
        }
    }
351
352
#endif

Gary Williams's avatar
NT port    
Gary Williams committed
353
    assert( c != NULL );
354

Gary Williams's avatar
NT port    
Gary Williams committed
355
    if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
356
		c->c_authmech = NULL;
Gary Williams's avatar
NT port    
Gary Williams committed
357
358
        c->c_dn = NULL;
        c->c_cdn = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
359
360
361
362
363
364

		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
365
366
        c->c_ops = NULL;
        c->c_pending_ops = NULL;
367

368
		c->c_sasl_bind_mech = NULL;
369
#ifdef HAVE_CYRUS_SASL
370
371
		c->c_sasl_bind_context = NULL;
#endif
372

Kurt Zeilenga's avatar
Kurt Zeilenga committed
373
        c->c_sb = ber_sockbuf_alloc( );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
374
		c->c_currentber = NULL;
375

Gary Williams's avatar
NT port    
Gary Williams committed
376
377
378
379
        /* 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 );
380

Gary Williams's avatar
NT port    
Gary Williams committed
381
382
        c->c_struct_state = SLAP_C_UNUSED;
    }
383

Gary Williams's avatar
NT port    
Gary Williams committed
384
    ldap_pvt_thread_mutex_lock( &c->c_mutex );
385

Gary Williams's avatar
NT port    
Gary Williams committed
386
    assert( c->c_struct_state == SLAP_C_UNUSED );
387
	assert( c->c_authmech == NULL );
Gary Williams's avatar
NT port    
Gary Williams committed
388
389
    assert(	c->c_dn == NULL );
    assert(	c->c_cdn == NULL );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
390
391
392
393
    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
394
395
    assert( c->c_ops == NULL );
    assert( c->c_pending_ops == NULL );
396
	assert( c->c_sasl_bind_mech == NULL );
397
#ifdef HAVE_CYRUS_SASL
398
	assert( c->c_sasl_bind_context == NULL );
399
#endif
Kurt Zeilenga's avatar
Kurt Zeilenga committed
400
	assert( c->c_currentber == NULL );
401

Kurt Zeilenga's avatar
Kurt Zeilenga committed
402
403
404
405
	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 );
406

Gary Williams's avatar
NT port    
Gary Williams committed
407
408
409
410
    c->c_n_ops_received = 0;
    c->c_n_ops_executing = 0;
    c->c_n_ops_pending = 0;
    c->c_n_ops_completed = 0;
411
412
413
414

	c->c_n_get = 0;
	c->c_n_read = 0;
	c->c_n_write = 0;
415

Kurt Zeilenga's avatar
Kurt Zeilenga committed
416
417
418
	/* assume LDAPv3 until bind */
	c->c_protocol = LDAP_VERSION3;

419
    c->c_activitytime = c->c_starttime = slap_get_time();
420

Kurt Zeilenga's avatar
Kurt Zeilenga committed
421
422
    ber_pvt_sb_set_desc( c->c_sb, s );
    ber_pvt_sb_set_io( c->c_sb, &ber_pvt_sb_io_tcp, NULL );
423

Kurt Zeilenga's avatar
Kurt Zeilenga committed
424
    if( ber_pvt_sb_set_nonblock( c->c_sb, 1 ) < 0 ) {
Gary Williams's avatar
NT port    
Gary Williams committed
425
        Debug( LDAP_DEBUG_ANY,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
426
427
            "connection_init(%d, %s): set nonblocking failed\n",
            s, c->c_peer_name,0 );
Gary Williams's avatar
NT port    
Gary Williams committed
428
    }
429

Gary Williams's avatar
NT port    
Gary Williams committed
430
    id = c->c_connid = conn_nextid++;
431

Gary Williams's avatar
NT port    
Gary Williams committed
432
433
    c->c_conn_state = SLAP_C_INACTIVE;
    c->c_struct_state = SLAP_C_USED;
434

Kurt Zeilenga's avatar
Kurt Zeilenga committed
435
#ifdef HAVE_TLS
436
    if ( use_tls ) {
437
438
	    c->c_is_tls = 1;
	    c->c_needs_tls_accept = 1;
439
440
441
    } else {
	    c->c_is_tls = 0;
	    c->c_needs_tls_accept = 0;
442
    }
Kurt Zeilenga's avatar
Kurt Zeilenga committed
443
#endif
444

Gary Williams's avatar
NT port    
Gary Williams committed
445
446
    ldap_pvt_thread_mutex_unlock( &c->c_mutex );
    ldap_pvt_thread_mutex_unlock( &connections_mutex );
447

448
449
    backend_connection_init(c);

Gary Williams's avatar
NT port    
Gary Williams committed
450
    return id;
451
452
453
454
455
}

static void
connection_destroy( Connection *c )
{
456
457
	/* note: connections_mutex should be locked by caller */

Gary Williams's avatar
NT port    
Gary Williams committed
458
459
460
461
462
    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 );
463

464
465
    backend_connection_destroy(c);

Gary Williams's avatar
NT port    
Gary Williams committed
466
    c->c_protocol = 0;
467
    c->c_connid = -1;
468

469
    c->c_activitytime = c->c_starttime = 0;
470

471
472
473
474
	if(c->c_authmech != NULL ) {
		free(c->c_authmech);
		c->c_authmech = NULL;
	}
Gary Williams's avatar
NT port    
Gary Williams committed
475
476
477
478
    if(c->c_dn != NULL) {
        free(c->c_dn);
        c->c_dn = NULL;
    }
479
480
481
482
	if(c->c_cdn != NULL) {
		free(c->c_cdn);
		c->c_cdn = NULL;
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
483
484
485
486
487
488
489
490
491
	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) {
492
493
494
495
496
497
498
499
500
501
502
503
504
#ifdef LDAP_PF_LOCAL
		/*
		 * If peer was a domain socket, unlink. Mind you,
		 * they may be un-named. Should we leave this to
		 * the client?
		 */
		if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
			char *path = c->c_peer_name + 5;
			if (path != '\0') {
				(void)unlink(path);
			}
		}
#endif /* LDAP_PF_LOCAL */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
505
506
		free(c->c_peer_name);
		c->c_peer_name = NULL;
507
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
508
509
510
	if(c->c_sock_name != NULL) {
		free(c->c_sock_name);
		c->c_sock_name = NULL;
511
512
	}

513
514
515
516
517
	c->c_sasl_bind_in_progress = 0;
	if(c->c_sasl_bind_mech != NULL) {
		free(c->c_sasl_bind_mech);
		c->c_sasl_bind_mech = NULL;
	}
518
#ifdef HAVE_CYRUS_SASL
519
520
521
	if(c->c_sasl_bind_context != NULL ) {
		sasl_dispose( &c->c_sasl_bind_context );
		c->c_sasl_bind_context = NULL;
522
	}
523
#endif
524

Kurt Zeilenga's avatar
Kurt Zeilenga committed
525
526
527
528
529
	if ( c->c_currentber != NULL ) {
		ber_free( c->c_currentber, 1 );
		c->c_currentber = NULL;
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
530
531
	if ( ber_pvt_sb_in_use(c->c_sb) ) {
		int sd = ber_pvt_sb_get_desc(c->c_sb);
532

533
		slapd_remove( sd, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
534
	   	ber_pvt_sb_close( c->c_sb );
535
536

		Statslog( LDAP_DEBUG_STATS,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
537
		    "conn=%ld fd=%d closed\n",
538
539
540
			c->c_connid, sd, 0, 0, 0 );
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
541
   	ber_pvt_sb_destroy( c->c_sb );
542
543
544

    c->c_conn_state = SLAP_C_INVALID;
    c->c_struct_state = SLAP_C_UNUSED;
545
546
}

547
548
int connection_state_closing( Connection *c )
{
549
550
	/* c_mutex must be locked by caller */

551
	int state;
552
553
554
	assert( c != NULL );
	assert( c->c_struct_state == SLAP_C_USED );

555
556
557
558
559
	state = c->c_conn_state;

	assert( state != SLAP_C_INVALID );

	return state == SLAP_C_CLOSING;
560
561
}

562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
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 );
	}
}

583
584
585
586
587
588
589
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 );

590
591
	/* c_mutex must be locked by caller */

592
	if( c->c_conn_state != SLAP_C_CLOSING ) {
593
		Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
594
			"connection_closing: readying conn=%ld sd=%d for close\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
595
			c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
596

Kurt Zeilenga's avatar
Kurt Zeilenga committed
597
598
599
		/* update state to closing */
		c->c_conn_state = SLAP_C_CLOSING;

600
		/* don't listen on this port anymore */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
601
		slapd_clr_read( ber_pvt_sb_get_desc( c->c_sb ), 1 );
602
603

		/* abandon active operations */
604
		connection_abandon( c );
605
606

		/* wake write blocked operations */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
607
		slapd_clr_write( ber_pvt_sb_get_desc(c->c_sb), 1 );
608
		ldap_pvt_thread_cond_signal( &c->c_write_cv );
609
610
611
	}
}

612
613
614
615
616
617
618
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 );

619
	/* note: connections_mutex and c_mutex should be locked by caller */
620

621
622
	if( c->c_ops != NULL ) {
		Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
623
			"connection_close: deferring conn=%ld sd=%d\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
624
			c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
625
626
627
628

		return;
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
629
	Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
630
		c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
631
632
633
634

	connection_destroy( c );
}

635
unsigned long connections_nextid(void)
636
{
637
	unsigned long id;
638
639
640
641
642
643
644
645
646
647
648
	assert( connections != NULL );

	ldap_pvt_thread_mutex_lock( &connections_mutex );

	id = conn_nextid;

	ldap_pvt_thread_mutex_unlock( &connections_mutex );

	return id;
}

649
Connection* connection_first( ber_socket_t *index )
650
651
{
	assert( connections != NULL );
652
	assert( index != NULL );
653
654
655

	ldap_pvt_thread_mutex_lock( &connections_mutex );

656
	*index = 0;
657

658
	return connection_next(NULL, index);
659
660
}

661
Connection* connection_next( Connection *c, ber_socket_t *index )
662
663
{
	assert( connections != NULL );
664
665
	assert( index != NULL );
	assert( *index <= dtblsize );
666
667
668
669
670
671
672

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

	c = NULL;

673
674
675
	for(; *index < dtblsize; (*index)++) {
		if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
			assert( connections[*index].c_conn_state == SLAP_C_INVALID );
676
677
678
679
680
681
682
#ifndef HAVE_WINSOCK
			continue;
#else
			break;
#endif
		}

683
684
685
		if( connections[*index].c_struct_state == SLAP_C_USED ) {
			assert( connections[*index].c_conn_state != SLAP_C_INVALID );
			c = &connections[(*index)++];
686
687
688
			break;
		}

689
690
		assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
		assert( connections[*index].c_conn_state == SLAP_C_INVALID );
691
692
693
694
695
696
697
698
699
	}

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

	return c;
}

700
void connection_done( Connection *c )
701
702
703
704
705
706
707
708
709
710
{
	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
711
712
713
714
715
716
/*
 * 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.
 */

717
718
static void *
connection_operation( void *arg_v )
Kurt Zeilenga's avatar
Kurt Zeilenga committed
719
{
720
	int rc;
721
	struct co_arg	*arg = arg_v;
722
	ber_tag_t tag = arg->co_op->o_tag;
723
	Connection *conn = arg->co_conn;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
724

Kurt Zeilenga's avatar
Kurt Zeilenga committed
725
726
727
	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
728

729
	if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
730
731
732
733
734
		Debug( LDAP_DEBUG_ANY, "connection_operation: "
			"error: SASL bind in progress (tag=%ld).\n",
			(long) tag, 0, 0 );
		send_ldap_result( conn, arg->co_op,
			rc = LDAP_OPERATIONS_ERROR,
735
736
737
738
			NULL, "SASL bind in progress", NULL, NULL );
		goto operations_error;
	}

739
	switch ( tag ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
740
	case LDAP_REQ_BIND:
741
		rc = do_bind( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
742
743
744
		break;

	case LDAP_REQ_UNBIND:
745
		rc = do_unbind( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
746
747
748
		break;

	case LDAP_REQ_ADD:
749
		rc = do_add( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
750
751
752
		break;

	case LDAP_REQ_DELETE:
753
		rc = do_delete( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
754
755
756
		break;

	case LDAP_REQ_MODRDN:
757
		rc = do_modrdn( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
758
759
760
		break;

	case LDAP_REQ_MODIFY:
761
		rc = do_modify( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
762
763
764
		break;

	case LDAP_REQ_COMPARE:
765
		rc = do_compare( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
766
767
768
		break;

	case LDAP_REQ_SEARCH:
769
		rc = do_search( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
770
771
772
		break;

	case LDAP_REQ_ABANDON:
773
		rc = do_abandon( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
774
775
		break;

776
	case LDAP_REQ_EXTENDED:
777
		rc = do_extended( conn, arg->co_op );
778
779
		break;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
780
	default:
781
782
783
784
785
786
		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
787
788
789
		break;
	}

790
	if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
791

792
operations_error:
Kurt Zeilenga's avatar
Kurt Zeilenga committed
793
794
795
	ldap_pvt_thread_mutex_lock( &num_ops_mutex );
	num_ops_completed++;
	ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
796
797

	ldap_pvt_thread_mutex_lock( &conn->c_mutex );
798

799
	conn->c_n_ops_executing--;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
800
	conn->c_n_ops_completed++;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
801

802
803
804
	slap_op_remove( &conn->c_ops, arg->co_op );
	slap_op_free( arg->co_op );
	arg->co_op = NULL;
805
	arg->co_conn = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
806
	free( (char *) arg );
807
	arg = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
808

809
	switch( tag ) {
810
	case LBER_ERROR:
811
	case LDAP_REQ_UNBIND:
812
		/* c_mutex is locked */
813
		connection_closing( conn );
814
815
816
		break;

	case LDAP_REQ_BIND:
817
818
819
		conn->c_sasl_bind_in_progress =
			rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;

820
821
822
		if( conn->c_conn_state == SLAP_C_BINDING) {
			conn->c_conn_state = SLAP_C_ACTIVE;
		}
823
824
	}

825
	ldap_pvt_thread_mutex_lock( &active_threads_mutex );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
826
	active_threads--;
827
	if( active_threads < 1 ) {
828
		ldap_pvt_thread_cond_signal(&active_threads_cond);
829
	}
830
	ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
831
832
833

	connection_resched( conn );

834
835
	ldap_pvt_thread_mutex_unlock( &conn->c_mutex );

836
	return NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
837
838
}

839
int connection_read(ber_socket_t s)
840
841
842
843
844
845
846
{
	int rc = 0;
	Connection *c;
	assert( connections != NULL );

	ldap_pvt_thread_mutex_lock( &connections_mutex );

847
	/* get (locked) connection */
848
	c = connection_get( s );
849

850
851
	if( c == NULL ) {
		Debug( LDAP_DEBUG_ANY,
852
853
			"connection_read(%ld): no connection!\n",
			(long) s, 0, 0 );
854
855
856

		slapd_remove(s, 0);

857
		ldap_pvt_thread_mutex_unlock( &connections_mutex );
858
859
860
		return -1;
	}

861
862
	c->c_n_read++;

863
864
865
866
867
868
869
870
871
872
	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;
	}

873
874
875
876
	Debug( LDAP_DEBUG_TRACE,
		"connection_read(%d): checking for input on id=%ld\n",
		s, c->c_connid, 0 );

877
878
879
880
#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 ) {
881
882
883
			struct timeval tv;
			fd_set rfd;

884
			Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
885
			       "connection_read(%d): TLS accept error error=%d id=%ld, closing\n",
886
887
			       s, rc, c->c_connid );

888
			c->c_needs_tls_accept = 0;
889
890
			/* connections_mutex and c_mutex are locked */
			connection_closing( c );
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905

			/* Drain input before close, to allow SSL error codes
			 * to propagate to client. */
			FD_ZERO(&rfd);
			FD_SET(s, &rfd);
			ber_pvt_sb_set_readahead(c->c_sb, 0);
			for (rc=1; rc>0;)
			{
			    char buf[4096];
			    tv.tv_sec = 1;
			    tv.tv_usec = 0;
			    rc = select(s+1, &rfd, NULL, NULL, &tv);
			    if (rc == 1)
				rc = ber_pvt_sb_read(c->c_sb, buf, sizeof(buf));
			}
906
907
908
909
910
911
912
913
914
915
			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

916
917
918
#define CONNECTION_INPUT_LOOP 1

#ifdef DATA_READY_LOOP
Julio Sánchez Fernández's avatar
   
Julio Sánchez Fernández committed
919
	while(!rc && ber_pvt_sb_data_ready(&c->c_sb))
920
#elif CONNECTION_INPUT_LOOP
Julio Sánchez Fernández's avatar
   
Julio Sánchez Fernández committed
921
	while(!rc)
922
923
#endif
	{
Julio Sánchez Fernández's avatar
   
Julio Sánchez Fernández committed
924
		/* How do we do this without getting into a busy loop ? */
925
926
927
928
929
		rc = connection_input( c );
	}

	if( rc < 0 ) {
		Debug( LDAP_DEBUG_TRACE,
930
931
			"connection_read(%d): input error=%d id=%ld, closing.\n",
			s, rc, c->c_connid );
932

933
		/* connections_mutex and c_mutex are locked */
934
		connection_closing( c );
935
936
937
		connection_close( c );
	}

938
939
940
941
	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 );
942
943
944
945
946
947
948
	connection_return( c );
	ldap_pvt_thread_mutex_unlock( &connections_mutex );
	return 0;
}

static int
connection_input(
Kurt Zeilenga's avatar
Kurt Zeilenga committed
949
950
951
    Connection *conn
)
{
952
	Operation *op;
953
954
955
	ber_tag_t	tag;
	ber_len_t	len;
	ber_int_t	msgid;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
956
957
958
959
960
	BerElement	*ber;

	if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
	    == NULL ) {
		Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
961
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
962
963
964
	}

	errno = 0;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
965
	if ( (tag = ber_get_next( conn->c_sb, &len, conn->c_currentber ))
966
967
	    != LDAP_TAG_MESSAGE )
	{
968
969
		int err = errno;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
970
		Debug( LDAP_DEBUG_TRACE,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
971
			"ber_get_next on fd %d failed errno=%d (%s)\n",
972
			ber_pvt_sb_get_desc( conn->c_sb ), err, sock_errstr(err) );
973
974
		Debug( LDAP_DEBUG_TRACE,
			"\t*** got %ld of %lu so far\n",
975
976
977
978
			(long) ( conn->c_currentber->ber_buf
				?  conn->c_currentber->ber_rwptr - conn->c_currentber->ber_buf
				: 0 ),
			(long) conn->c_currentber->ber_len, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
979

980
		if ( err != EWOULDBLOCK && err != EAGAIN ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
981
982
983
984
			/* log, close and send error */
			ber_free( conn->c_currentber, 1 );
			conn->c_currentber = NULL;

985
			return -2;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
986
		}
987
		return 1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
988
	}
989

Kurt Zeilenga's avatar
Kurt Zeilenga committed
990
991
992
993
994
	ber = conn->c_currentber;
	conn->c_currentber = NULL;

	if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
		/* log, close and send error */
995
		Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
996
997
		    0 );
		ber_free( ber, 1 );
998
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
999
1000
1001
1002
	}

	if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
		/* log, close and send error */
1003
		Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
1004
1005
1006
		    0 );
		ber_free( ber, 1 );

1007
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
1008
1009
	}

1010
1011
1012
1013
1014
	if(tag == LDAP_REQ_BIND) {
		/* immediately abandon all exiting operations upon BIND */
		connection_abandon( conn );
	}

1015
	op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1016

1017
1018
1019
	if ( conn->c_conn_state == SLAP_C_BINDING
		|| conn->c_conn_state == SLAP_C_CLOSING )
	{
1020
		Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1021
		conn->c_n_ops_pending++;
1022
		slap_op_add( &conn->c_pending_ops, op );
1023

1024
	} else {
1025
		conn->c_n_ops_executing++;
1026
1027
		connection_op_activate( conn, op );
	}
1028

1029
1030
1031
1032
#ifdef NO_THREADS
	if ( conn->c_struct_state != SLAP_C_USED ) {
		/* connection must have got closed underneath us */
		return 1;
1033
	}
1034
1035
#endif
	assert( conn->c_struct_state == SLAP_C_USED );