connection.c 20.5 KB
Newer Older
Kurt Zeilenga's avatar
Kurt Zeilenga committed
1
#include "portable.h"
Kurt Zeilenga's avatar
Kurt Zeilenga committed
2
3
4

#include <stdio.h>

5
#include <ac/socket.h>
Kurt Zeilenga's avatar
Kurt Zeilenga committed
6
7
8
9
10
#include <ac/errno.h>
#include <ac/signal.h>
#include <ac/string.h>
#include <ac/time.h>

Kurt Zeilenga's avatar
Kurt Zeilenga committed
11
12
#include "slap.h"

Kurt Zeilenga's avatar
Kurt Zeilenga committed
13
14
15
/* we need LBER internals */
#include "../../libraries/liblber/lber-int.h"

16
17
18
19
20
/* protected by connections_mutex */
static ldap_pvt_thread_mutex_t connections_mutex;
static Connection *connections = NULL;
static long conn_nextid = 0;

21
/* structure state (protected by connections_mutex) */
22
23
24
#define SLAP_C_UNINITIALIZED	0x00	/* MUST BE ZERO (0) */
#define SLAP_C_UNUSED			0x01
#define SLAP_C_USED				0x02
25
26

/* connection state (protected by c_mutex ) */
27
28
29
30
31
#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 */
32

33
34
35
static Connection* connection_get( int s );

static int connection_input( Connection *c );
36
static void connection_close( Connection *c );
37

38
39
40
static int connection_op_activate( Connection *conn, Operation *op );
static int connection_resched( Connection *conn );

Kurt Zeilenga's avatar
Kurt Zeilenga committed
41
42
43
44
45
struct co_arg {
	Connection	*co_conn;
	Operation	*co_op;
};

46
47
48
49
50
51
52
/*
 * Initialize connection management infrastructure.
 */
int connections_init(void)
{
	assert( connections == NULL );

53
	if( connections != NULL) {
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
		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,
			"connections_init: allocation (%d*%ld) of connection array failed.\n",
			dtblsize, (long) sizeof(Connection), 0 );
		return -1;
	}

71
72
73
    assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
    assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );

74
75
76
77
78
79
80
81
	/*
	 * per entry initialization of the Connection array initialization
	 * will be done by connection_init()
	 */ 

	return 0;
}

82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
/*
 * Destroy connection management infrastructure.
 */
int connections_destroy(void)
{
	int i;

	/* 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++ ) {
98
99
100
101
102
		if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
			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 );
		}
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
	}

	free( connections );
	connections = NULL;

	ldap_pvt_thread_mutex_destroy( &connections_mutex );
	return 0;
}

/*
 * shutdown all connections
 */
int connections_shutdown(void)
{
	int i;

	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 );
127
128

		/* connections_mutex and c_mutex are locked */
129
130
		connection_closing( &connections[i] );
		connection_close( &connections[i] );
131

132
133
134
135
		ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
	}

	ldap_pvt_thread_mutex_unlock( &connections_mutex );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
136
137

	return 0;
138
139
}

140
141
static Connection* connection_get( int s )
{
142
143
	/* connections_mutex should be locked by caller */

144
145
146
147
148
	Connection *c;

	Debug( LDAP_DEBUG_ARGS,
		"connection_get(%d)\n",
		s, 0, 0 );
149
150
151
152
153
154
155
156
157

	assert( connections != NULL );

	if(s < 0) {
		return NULL;
	}

#ifndef HAVE_WINSOCK
	c = &connections[s];
158

Kurt Zeilenga's avatar
Kurt Zeilenga committed
159
	assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
160

161
#else
162
	c = NULL;
163
164
165
166
	{
		int i;

		for(i=0; i<dtblsize; i++) {
Gary Williams's avatar
NT port    
Gary Williams committed
167
			if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
168
				assert( connections[i].c_conn_state == SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
169
				assert( connections[i].c_sb == 0 );
170
171
172
				break;
			}

Gary Williams's avatar
NT port    
Gary Williams committed
173
			if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
174
				assert( connections[i].c_conn_state == SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
175
				assert( !ber_pvt_sb_in_use( connections[i].c_sb ) );
176
177
178
				continue;
			}

Gary Williams's avatar
NT port    
Gary Williams committed
179
			assert( connections[i].c_struct_state == SLAP_C_USED );
180
			assert( connections[i].c_conn_state != SLAP_C_INVALID );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
181
			assert( ber_pvt_sb_in_use( connections[i].c_sb ) );
182

Kurt Zeilenga's avatar
Kurt Zeilenga committed
183
			if( ber_pvt_sb_get_desc( connections[i].c_sb ) == s ) {
Gary Williams's avatar
NT port    
Gary Williams committed
184
				c = &connections[i];
185
186
187
188
189
				break;
			}
		}
	}
#endif
190

191
	if( c != NULL ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
192
193
		ldap_pvt_thread_mutex_lock( &c->c_mutex );

194
195
196
197
198
199
200
201
202
203
204
205
		if( c->c_struct_state != SLAP_C_USED ) {
			/* connection must have been closed due to resched */
			assert( c->c_conn_state == SLAP_C_INVALID );
			assert( !ber_pvt_sb_in_use( c->c_sb ) );

			Debug( LDAP_DEBUG_TRACE,
				"connection_get(%d): connection not used.\n",
				s, c->c_connid, 0 );

			return NULL;
		}

206
207
208
		Debug( LDAP_DEBUG_TRACE,
			"connection_get(%d): got connid=%ld\n",
			s, c->c_connid, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
209
210
211
212

		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 ) );
213
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
214

215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
	return c;
}

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

long connection_init(
	int s,
	const char* name,
	const char* addr)
{
	long id;
	Connection *c;
	assert( connections != NULL );

	if( s < 0 ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
233
234
        Debug( LDAP_DEBUG_ANY,
			"connection_init(%d): invalid.\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
235
			s, 0, 0 );
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
		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
	{
		int i;

253
254
		c = NULL;

Gary Williams's avatar
NT port    
Gary Williams committed
255
256
        for( i=0; i < dtblsize; i++) {
            if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
257
                assert( connections[i].c_sb == 0 );
Gary Williams's avatar
NT port    
Gary Williams committed
258
259
260
261
262
                c = &connections[i];
                break;
            }

            if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
263
                assert( !ber_pvt_sb_in_use( connections[i].c_sb ));
Gary Williams's avatar
NT port    
Gary Williams committed
264
265
266
267
268
269
                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
270
            assert( ber_pvt_sb_in_use( connections[i].c_sb ));
Gary Williams's avatar
NT port    
Gary Williams committed
271
272
273
        }

        if( c == NULL ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
274
275
276
        	Debug( LDAP_DEBUG_ANY,
				"connection_init(%d): connection table full (%d/%d).\n",
				s, i, dtblsize);
Gary Williams's avatar
NT port    
Gary Williams committed
277
278
279
280
            ldap_pvt_thread_mutex_unlock( &connections_mutex );
            return -1;
        }
    }
281
282
#endif

Gary Williams's avatar
NT port    
Gary Williams committed
283
284
285
    assert( c != NULL );
    assert( c->c_struct_state != SLAP_C_USED );
    assert( c->c_conn_state == SLAP_C_INVALID );
286

Gary Williams's avatar
NT port    
Gary Williams committed
287
288
289
290
291
292
293
    if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
        c->c_dn = NULL;
        c->c_cdn = NULL;
        c->c_client_name = NULL;
        c->c_client_addr = NULL;
        c->c_ops = NULL;
        c->c_pending_ops = NULL;
294

Kurt Zeilenga's avatar
Kurt Zeilenga committed
295
        c->c_sb = ber_sockbuf_alloc( );
296

Gary Williams's avatar
NT port    
Gary Williams committed
297
298
299
300
        /* 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 );
301

Gary Williams's avatar
NT port    
Gary Williams committed
302
303
        c->c_struct_state = SLAP_C_UNUSED;
    }
304

Gary Williams's avatar
NT port    
Gary Williams committed
305
    ldap_pvt_thread_mutex_lock( &c->c_mutex );
306

Gary Williams's avatar
NT port    
Gary Williams committed
307
308
309
310
311
312
313
    assert( c->c_struct_state == SLAP_C_UNUSED );
    assert(	c->c_dn == NULL );
    assert(	c->c_cdn == NULL );
    assert( c->c_client_name == NULL );
    assert( c->c_client_addr == NULL );
    assert( c->c_ops == NULL );
    assert( c->c_pending_ops == NULL );
314

Gary Williams's avatar
NT port    
Gary Williams committed
315
316
    c->c_client_name = ch_strdup( name == NULL ? "" : name );
    c->c_client_addr = ch_strdup( addr );
317

Gary Williams's avatar
NT port    
Gary Williams committed
318
    c->c_n_ops_received = 0;
319
#ifdef LDAP_COUNTERS
Gary Williams's avatar
NT port    
Gary Williams committed
320
321
322
    c->c_n_ops_executing = 0;
    c->c_n_ops_pending = 0;
    c->c_n_ops_completed = 0;
323
324
#endif

Gary Williams's avatar
NT port    
Gary Williams committed
325
    c->c_starttime = slap_get_time();
326

Kurt Zeilenga's avatar
Kurt Zeilenga committed
327
328
    ber_pvt_sb_set_desc( c->c_sb, s );
    ber_pvt_sb_set_io( c->c_sb, &ber_pvt_sb_io_tcp, NULL );
329

Kurt Zeilenga's avatar
Kurt Zeilenga committed
330
    if( ber_pvt_sb_set_nonblock( c->c_sb, 1 ) < 0 ) {
Gary Williams's avatar
NT port    
Gary Williams committed
331
332
333
334
        Debug( LDAP_DEBUG_ANY,
            "connection_init(%d, %s, %s): set nonblocking failed\n",
            s, c->c_client_name, c->c_client_addr);
    }
335

Gary Williams's avatar
NT port    
Gary Williams committed
336
    id = c->c_connid = conn_nextid++;
337

Gary Williams's avatar
NT port    
Gary Williams committed
338
339
    c->c_conn_state = SLAP_C_INACTIVE;
    c->c_struct_state = SLAP_C_USED;
340

Gary Williams's avatar
NT port    
Gary Williams committed
341
342
    ldap_pvt_thread_mutex_unlock( &c->c_mutex );
    ldap_pvt_thread_mutex_unlock( &connections_mutex );
343

Gary Williams's avatar
NT port    
Gary Williams committed
344
    return id;
345
346
347
348
349
}

static void
connection_destroy( Connection *c )
{
350
351
	/* note: connections_mutex should be locked by caller */

Gary Williams's avatar
NT port    
Gary Williams committed
352
353
354
355
356
    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 );
357

Gary Williams's avatar
NT port    
Gary Williams committed
358
359
    c->c_struct_state = SLAP_C_UNUSED;
    c->c_conn_state = SLAP_C_INVALID;
360

Kurt Zeilenga's avatar
ldap.h:    
Kurt Zeilenga committed
361
#ifdef LDAP_COMPAT30
Gary Williams's avatar
NT port    
Gary Williams committed
362
    c->c_version = 0;
Kurt Zeilenga's avatar
ldap.h:    
Kurt Zeilenga committed
363
#endif
Gary Williams's avatar
NT port    
Gary Williams committed
364
    c->c_protocol = 0;
365

Gary Williams's avatar
NT port    
Gary Williams committed
366
    c->c_starttime = 0;
367

Gary Williams's avatar
NT port    
Gary Williams committed
368
369
370
371
    if(c->c_dn != NULL) {
        free(c->c_dn);
        c->c_dn = NULL;
    }
372
373
374
375
376
377
378
379
380
381
382
383
384
	if(c->c_cdn != NULL) {
		free(c->c_cdn);
		c->c_cdn = NULL;
	}
	if(c->c_client_name != NULL) {
		free(c->c_client_name);
		c->c_client_name = NULL;
	}
	if(c->c_client_addr != NULL) {
		free(c->c_client_addr);
		c->c_client_addr = NULL;
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
385
386
	if ( ber_pvt_sb_in_use(c->c_sb) ) {
		int sd = ber_pvt_sb_get_desc(c->c_sb);
387

388
		slapd_remove( sd, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
389
	   	ber_pvt_sb_close( c->c_sb );
390
391
392
393
394
395

		Statslog( LDAP_DEBUG_STATS,
		    "conn=%d fd=%d closed.\n",
			c->c_connid, sd, 0, 0, 0 );
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
396
   	ber_pvt_sb_destroy( c->c_sb );
397
398
}

399
400
int connection_state_closing( Connection *c )
{
401
402
	/* c_mutex must be locked by caller */

403
	int state;
404
405
406
	assert( c != NULL );
	assert( c->c_struct_state == SLAP_C_USED );

407
408
409
410
411
	state = c->c_conn_state;

	assert( state != SLAP_C_INVALID );

	return state == SLAP_C_CLOSING;
412
413
}

414
415
416
417
418
419
420
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 );

421
422
	/* c_mutex must be locked by caller */

423
	if( c->c_conn_state != SLAP_C_CLOSING ) {
424
425
426
427
		Operation *o;

		Debug( LDAP_DEBUG_TRACE,
			"connection_closing: readying conn=%ld sd=%d for close.\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
428
			c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
429

Kurt Zeilenga's avatar
Kurt Zeilenga committed
430
431
432
		/* update state to closing */
		c->c_conn_state = SLAP_C_CLOSING;

433
		/* don't listen on this port anymore */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
434
		slapd_clr_read( ber_pvt_sb_get_desc( c->c_sb ), 1 );
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453

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

		/* abandon active operations */
		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 );
		}

		/* wake write blocked operations */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
454
		slapd_clr_write( ber_pvt_sb_get_desc(c->c_sb), 1 );
455
		ldap_pvt_thread_cond_signal( &c->c_write_cv );
456
457
458
	}
}

459
460
461
462
463
464
465
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 );

466
	/* note: connections_mutex and c_mutex should be locked by caller */
467

468
469
470
	if( c->c_ops != NULL ) {
		Debug( LDAP_DEBUG_TRACE,
			"connection_close: deferring conn=%ld sd=%d.\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
471
			c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
472
473
474
475
476

		return;
	}

	Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d.\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
477
		c->c_connid, ber_pvt_sb_get_desc( c->c_sb ), 0 );
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495

	connection_destroy( c );
}

long connections_nextid(void)
{
	long id;
	assert( connections != NULL );

	ldap_pvt_thread_mutex_lock( &connections_mutex );

	id = conn_nextid;

	ldap_pvt_thread_mutex_unlock( &connections_mutex );

	return id;
}

496
Connection* connection_first( int *index )
497
498
{
	assert( connections != NULL );
499
	assert( index != NULL );
500
501
502

	ldap_pvt_thread_mutex_lock( &connections_mutex );

503
	*index = 0;
504

505
	return connection_next(NULL, index);
506
507
}

508
Connection* connection_next( Connection *c, int *index )
509
510
{
	assert( connections != NULL );
511
512
	assert( index != NULL );
	assert( *index <= dtblsize );
513
514
515
516
517
518
519

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

	c = NULL;

520
521
522
	for(; *index < dtblsize; (*index)++) {
		if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
			assert( connections[*index].c_conn_state == SLAP_C_INVALID );
523
524
525
526
527
528
529
#ifndef HAVE_WINSOCK
			continue;
#else
			break;
#endif
		}

530
531
532
		if( connections[*index].c_struct_state == SLAP_C_USED ) {
			assert( connections[*index].c_conn_state != SLAP_C_INVALID );
			c = &connections[(*index)++];
533
534
535
			break;
		}

536
537
		assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
		assert( connections[*index].c_conn_state == SLAP_C_INVALID );
538
539
540
541
542
543
544
545
546
	}

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

	return c;
}

547
void connection_done( Connection *c )
548
549
550
551
552
553
554
555
556
557
{
	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
558
559
560
561
562
563
/*
 * 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.
 */

564
565
static void *
connection_operation( void *arg_v )
Kurt Zeilenga's avatar
Kurt Zeilenga committed
566
{
567
	struct co_arg	*arg = arg_v;
568
569
	int tag = arg->co_op->o_tag;
	Connection *conn = arg->co_conn;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
570

571
#ifdef LDAP_COUNTERS
Kurt Zeilenga's avatar
Kurt Zeilenga committed
572
573
574
	ldap_pvt_thread_mutex_lock( &num_ops_mutex );
	num_ops_initiated++;
	ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
575
#endif
Kurt Zeilenga's avatar
Kurt Zeilenga committed
576

577
	switch ( tag ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
578
	case LDAP_REQ_BIND:
579
		do_bind( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
580
581
		break;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
582
#ifdef LDAP_COMPAT30
Kurt Zeilenga's avatar
Kurt Zeilenga committed
583
584
585
	case LDAP_REQ_UNBIND_30:
#endif
	case LDAP_REQ_UNBIND:
586
		do_unbind( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
587
588
589
		break;

	case LDAP_REQ_ADD:
590
		do_add( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
591
592
		break;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
593
#ifdef LDAP_COMPAT30
Kurt Zeilenga's avatar
Kurt Zeilenga committed
594
595
596
	case LDAP_REQ_DELETE_30:
#endif
	case LDAP_REQ_DELETE:
597
		do_delete( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
598
599
600
		break;

	case LDAP_REQ_MODRDN:
601
		do_modrdn( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
602
603
604
		break;

	case LDAP_REQ_MODIFY:
605
		do_modify( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
606
607
608
		break;

	case LDAP_REQ_COMPARE:
609
		do_compare( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
610
611
612
		break;

	case LDAP_REQ_SEARCH:
613
		do_search( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
614
615
		break;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
616
#ifdef LDAP_COMPAT30
Kurt Zeilenga's avatar
Kurt Zeilenga committed
617
618
619
	case LDAP_REQ_ABANDON_30:
#endif
	case LDAP_REQ_ABANDON:
620
		do_abandon( conn, arg->co_op );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
621
622
623
		break;

	default:
624
		Debug( LDAP_DEBUG_ANY, "unknown request 0x%lx\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
625
626
627
628
		    arg->co_op->o_tag, 0, 0 );
		break;
	}

629
#ifdef LDAP_COUNTERS
Kurt Zeilenga's avatar
Kurt Zeilenga committed
630
631
632
	ldap_pvt_thread_mutex_lock( &num_ops_mutex );
	num_ops_completed++;
	ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
633
634
635
#endif

	ldap_pvt_thread_mutex_lock( &conn->c_mutex );
636

637
#ifdef LDAP_COUNTERS
Kurt Zeilenga's avatar
Kurt Zeilenga committed
638
	conn->c_n_ops_completed++;
639
#endif
Kurt Zeilenga's avatar
Kurt Zeilenga committed
640

641
642
643
	slap_op_remove( &conn->c_ops, arg->co_op );
	slap_op_free( arg->co_op );
	arg->co_op = NULL;
644
	arg->co_conn = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
645
	free( (char *) arg );
646
	arg = NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
647

648
649
650
651
652
	switch( tag ) {
#ifdef LDAP_COMPAT30
	case LDAP_REQ_UNBIND_30:
#endif
	case LDAP_REQ_UNBIND:
653
		/* c_mutex is locked */
654
		connection_closing( conn );
655
656
657
658
659
660
		break;

	case LDAP_REQ_BIND:
		if( conn->c_conn_state == SLAP_C_BINDING) {
			conn->c_conn_state = SLAP_C_ACTIVE;
		}
661
662
	}

663
	ldap_pvt_thread_mutex_lock( &active_threads_mutex );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
664
	active_threads--;
665
	if( active_threads < 1 ) {
666
		ldap_pvt_thread_cond_signal(&active_threads_cond);
667
	}
668
	ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
669
670
671

	connection_resched( conn );

672
673
	ldap_pvt_thread_mutex_unlock( &conn->c_mutex );

674
	return NULL;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
675
676
}

677
678
679
680
681
682
683
684
int connection_read(int s)
{
	int rc = 0;
	Connection *c;
	assert( connections != NULL );

	ldap_pvt_thread_mutex_lock( &connections_mutex );

685
	/* get (locked) connection */
686
	c = connection_get( s );
687

688
689
690
691
	if( c == NULL ) {
		Debug( LDAP_DEBUG_ANY,
			"connection_read(%d): no connection!\n",
			s, 0, 0 );
692
693
694

		slapd_remove(s, 0);

695
		ldap_pvt_thread_mutex_unlock( &connections_mutex );
696
697
698
		return -1;
	}

699
700
701
702
703
704
705
706
707
708
	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;
	}

709
710
711
712
713
714
715
	Debug( LDAP_DEBUG_TRACE,
		"connection_read(%d): checking for input on id=%ld\n",
		s, c->c_connid, 0 );

#define CONNECTION_INPUT_LOOP 1

#ifdef DATA_READY_LOOP
Kurt Zeilenga's avatar
Kurt Zeilenga committed
716
	while(!rc && ber_pvt_sb_data_ready(&c->c_sb))
717
718
719
720
721
722
723
724
725
#elif CONNECTION_INPUT_LOOP
	while(!rc)
#endif
	{
		rc = connection_input( c );
	}

	if( rc < 0 ) {
		Debug( LDAP_DEBUG_TRACE,
726
727
			"connection_read(%d): input error=%d id=%ld, closing.\n",
			s, rc, c->c_connid );
728

729
		/* connections_mutex and c_mutex are locked */
730
		connection_closing( c );
731
732
733
734
735
736
737
738
739
740
		connection_close( c );
	}

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

static int
connection_input(
Kurt Zeilenga's avatar
Kurt Zeilenga committed
741
742
743
    Connection *conn
)
{
744
	Operation *op;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
745
746
747
748
749
750
751
	unsigned long	tag, len;
	long		msgid;
	BerElement	*ber;

	if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
	    == NULL ) {
		Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
752
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
753
754
755
	}

	errno = 0;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
756
	if ( (tag = ber_get_next( conn->c_sb, &len, conn->c_currentber ))
757
758
	    != LDAP_TAG_MESSAGE )
	{
759
760
		int err = errno;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
761
		Debug( LDAP_DEBUG_TRACE,
762
			"ber_get_next on fd %d failed errno %d (%s)\n",
Kurt Zeilenga's avatar
Kurt Zeilenga committed
763
			ber_pvt_sb_get_desc( conn->c_sb ), err,
764
			err > -1 && err < sys_nerr ?  sys_errlist[err] : "unknown" );
765
766
		Debug( LDAP_DEBUG_TRACE,
			"\t*** got %ld of %lu so far\n",
767
768
			(long)(conn->c_currentber->ber_rwptr - conn->c_currentber->ber_buf),
			conn->c_currentber->ber_len, 0 );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
769

770
		if ( err != EWOULDBLOCK && err != EAGAIN ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
771
772
773
774
			/* log, close and send error */
			ber_free( conn->c_currentber, 1 );
			conn->c_currentber = NULL;

775
			return -2;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
776
		}
777
		return 1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
778
	}
779

Kurt Zeilenga's avatar
Kurt Zeilenga committed
780
781
782
783
784
	ber = conn->c_currentber;
	conn->c_currentber = NULL;

	if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
		/* log, close and send error */
785
		Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
786
787
		    0 );
		ber_free( ber, 1 );
788
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
789
790
791
792
	}

	if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
		/* log, close and send error */
793
		Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
794
795
796
		    0 );
		ber_free( ber, 1 );

797
		return -1;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
798
799
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
800
#ifdef LDAP_COMPAT30
Kurt Zeilenga's avatar
Kurt Zeilenga committed
801
802
803
804
805
	if ( conn->c_version == 30 ) {
		(void) ber_skip_tag( ber, &len );
	}
#endif

806
	op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
807

808
809
810
	if ( conn->c_conn_state == SLAP_C_BINDING
		|| conn->c_conn_state == SLAP_C_CLOSING )
	{
811
		Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
812
		slap_op_add( &conn->c_pending_ops, op );
813

814
815
816
	} else {
		connection_op_activate( conn, op );
	}
817

818
819
820
821
#ifdef NO_THREADS
	if ( conn->c_struct_state != SLAP_C_USED ) {
		/* connection must have got closed underneath us */
		return 1;
822
	}
823
824
#endif
	assert( conn->c_struct_state == SLAP_C_USED );
825

826
	return 0;
827
828
829
830
831
832
833
}

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

834
835
836
837
838
839
840
841
842
	if( conn->c_conn_state == SLAP_C_CLOSING ) {
		Debug( LDAP_DEBUG_TRACE,
			"connection_resched: attempting closing conn=%ld sd=%d.\n",
			conn->c_connid, ber_pvt_sb_get_desc( conn->c_sb ), 0 );

		connection_close( conn );
		return 0;
	}

843
	if( conn->c_conn_state != SLAP_C_ACTIVE ) {
844
		/* other states need different handling */
Gary Williams's avatar
NT port    
Gary Williams committed
845
		return 0;
846
847
848
849
850
851
	}

	for( op = slap_op_pop( &conn->c_pending_ops );
		op != NULL;
		op = slap_op_pop( &conn->c_pending_ops ) )
	{
852
853
854
		/* pending operations should not be marked for abandonment */
		assert(!op->o_abandon);

855
856
		connection_op_activate( conn, op );

857
		if ( conn->c_conn_state == SLAP_C_BINDING ) {
858
859
860
			break;
		}
	}
Gary Williams's avatar
NT port    
Gary Williams committed
861
	return 0;
862
863
864
865
866
867
868
869
}

static int connection_op_activate( Connection *conn, Operation *op )
{
	struct co_arg *arg;
	char *tmpdn;
	int status;
	unsigned long tag = op->o_tag;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
870
871

	if ( conn->c_dn != NULL ) {
872
		tmpdn = ch_strdup( conn->c_dn );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
873
874
875
876
	} else {
		tmpdn = NULL;
	}

877
878
879
880
881
882
883
884
885
886
	arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
	arg->co_conn = conn;
	arg->co_op = op;

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

	slap_op_add( &conn->c_ops, arg->co_op );

	if(tag == LDAP_REQ_BIND) {
887
		conn->c_conn_state = SLAP_C_BINDING;
888
889
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
890
891
892
893
	if ( tmpdn != NULL ) {
		free( tmpdn );
	}

894
895
896
897
	ldap_pvt_thread_mutex_lock( &active_threads_mutex );
	active_threads++;
	ldap_pvt_thread_mutex_unlock( &active_threads_mutex );

898
899
	status = ldap_pvt_thread_create( &arg->co_op->o_tid, 1,
					 connection_operation, (void *) arg );
900

901
	if ( status != 0 ) {
902
903
904
905
		Debug( LDAP_DEBUG_ANY,
		"ldap_pvt_thread_create failed (%d)\n", status, 0, 0 );

		/* should move op to pending list */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
906
	}
907
908

	return status;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
909
}
910
911
912
913
914
915
916
917
918

int connection_write(int s)
{
	Connection *c;
	assert( connections != NULL );

	ldap_pvt_thread_mutex_lock( &connections_mutex );

	c = connection_get( s );
919
920
921

	slapd_clr_write( s, 0);

922
923
924
925
	if( c == NULL ) {
		Debug( LDAP_DEBUG_ANY,
			"connection_write(%d): no connection!\n",
			s, 0, 0 );
926
		slapd_remove(s, 0);
927
		ldap_pvt_thread_mutex_unlock( &connections_mutex );
928
929
930
931
932
933
934
935
936
937
938
939
940
		return -1;
	}

	Debug( LDAP_DEBUG_TRACE,
		"connection_write(%d): waking output for id=%ld\n",
		s, c->c_connid, 0 );

	ldap_pvt_thread_cond_signal( &c->c_write_cv );

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