connection.c 53.8 KB
Newer Older
1
/* $OpenLDAP$ */
Kurt Zeilenga's avatar
Kurt Zeilenga committed
2
3
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
Quanah Gibson-Mount's avatar
Quanah Gibson-Mount committed
4
 * Copyright 1998-2019 The OpenLDAP Foundation.
Kurt Zeilenga's avatar
Kurt Zeilenga committed
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
/* Portions Copyright (c) 1995 Regents of the University of Michigan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of Michigan at Ann Arbor. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
Kurt Zeilenga's avatar
Kurt Zeilenga committed
24
25
 */

Kurt Zeilenga's avatar
Kurt Zeilenga committed
26
#include "portable.h"
Kurt Zeilenga's avatar
Kurt Zeilenga committed
27
28

#include <stdio.h>
Kurt Zeilenga's avatar
Kurt Zeilenga committed
29
#ifdef HAVE_LIMITS_H
Kurt Zeilenga's avatar
Kurt Zeilenga committed
30
#include <limits.h>
Kurt Zeilenga's avatar
Kurt Zeilenga committed
31
#endif
Kurt Zeilenga's avatar
Kurt Zeilenga committed
32

33
#include <ac/socket.h>
Kurt Zeilenga's avatar
Kurt Zeilenga committed
34
35
36
#include <ac/errno.h>
#include <ac/string.h>
#include <ac/time.h>
Pierangelo Masarati's avatar
Pierangelo Masarati committed
37
#include <ac/unistd.h>
Kurt Zeilenga's avatar
Kurt Zeilenga committed
38

Kurt Zeilenga's avatar
Kurt Zeilenga committed
39
#include "lutil.h"
Kurt Zeilenga's avatar
Kurt Zeilenga committed
40
41
#include "slap.h"

42
43
44
45
#ifdef LDAP_CONNECTIONLESS
#include "../../libraries/liblber/lber-int.h"	/* ber_int_sb_read() */
#endif

46
#ifdef LDAP_SLAPI
47
#include "slapi/slapi.h"
48
49
#endif

50
51
52
/* protected by connections_mutex */
static ldap_pvt_thread_mutex_t connections_mutex;
static Connection *connections = NULL;
Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
53

54
static ldap_pvt_thread_mutex_t conn_nextid_mutex;
55
static unsigned long conn_nextid = SLAPD_SYNC_SYNCCONN_OFFSET;
56

57
58
static const char conn_lost_str[] = "connection lost";

59
60
61
const char *
connection_state2str( int state )
{
62
	switch( state ) {
63
64
	case SLAP_C_INVALID:	return "!";
	case SLAP_C_INACTIVE:	return "|";
65
	case SLAP_C_CLOSING:	return "C";
66
	case SLAP_C_ACTIVE:		return "";
67
	case SLAP_C_BINDING:	return "B";
68
	case SLAP_C_CLIENT:		return "L";
69
70
71
72
73
	}

	return "?";
}

74
static Connection* connection_get( ber_socket_t s );
75

76
77
78
79
typedef struct conn_readinfo {
	Operation *op;
	ldap_pvt_thread_start_t *func;
	void *arg;
Howard Chu's avatar
Howard Chu committed
80
	void *ctx;
81
82
83
84
	int nullop;
} conn_readinfo;

static int connection_input( Connection *c, conn_readinfo *cri );
85
static void connection_close( Connection *c );
86

87
static int connection_op_activate( Operation *op );
88
static void connection_op_queue( Operation *op );
89
static int connection_resched( Connection *conn );
90
static void connection_abandon( Connection *conn );
91
static void connection_destroy( Connection *c );
92

93
94
static ldap_pvt_thread_start_t connection_operation;

95
96
97
98
99
/*
 * Initialize connection management infrastructure.
 */
int connections_init(void)
{
100
101
	int i;

102
103
	assert( connections == NULL );

104
	if( connections != NULL) {
105
		Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n" );
106
107
108
109
110
		return -1;
	}

	/* should check return of every call */
	ldap_pvt_thread_mutex_init( &connections_mutex );
111
	ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
112

113
	connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
114
115

	if( connections == NULL ) {
116
117
		Debug( LDAP_DEBUG_ANY, "connections_init: "
			"allocation (%d*%ld) of connection array failed\n",
118
			dtblsize, (long) sizeof(Connection) );
119
120
121
		return -1;
	}

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
122
	assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
123
	assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
124

125
126
127
128
129
130
131
	for (i=0; i<dtblsize; i++) {
		connections[i].c_conn_idx = i;
		ldap_pvt_thread_mutex_init( &connections[i].c_mutex );
		ldap_pvt_thread_mutex_init( &connections[i].c_write1_mutex );
		ldap_pvt_thread_cond_init( &connections[i].c_write1_cv );
	}

132

133
134
135
136
137
138
139
140
	/*
	 * per entry initialization of the Connection array initialization
	 * will be done by connection_init()
	 */ 

	return 0;
}

141
142
143
/*
 * Destroy connection management infrastructure.
 */
144

145
146
int connections_destroy(void)
{
147
	ber_socket_t i;
148
149
150
151

	/* should check return of every call */

	if( connections == NULL) {
152
		Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n" );
153
154
155
		return -1;
	}

156
	for ( i = 0; i < dtblsize; i++ ) {
157
		if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
158
			ber_sockbuf_free( connections[i].c_sb );
159
			ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
160
161
			ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
			ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
162
#ifdef LDAP_SLAPI
163
			if ( slapi_plugins_used ) {
164
165
				slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
					&connections[i] );
Howard Chu's avatar
Howard Chu committed
166
			}
167
#endif
168
		}
169
170
171
172
173
174
	}

	free( connections );
	connections = NULL;

	ldap_pvt_thread_mutex_destroy( &connections_mutex );
175
	ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
176
177
178
179
180
181
182
183
	return 0;
}

/*
 * shutdown all connections
 */
int connections_shutdown(void)
{
184
	ber_socket_t i;
185

186
	for ( i = 0; i < dtblsize; i++ ) {
187
188
189
190
191
192
193
194
195
196
197
198
199
		if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
			ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
			if( connections[i].c_struct_state == SLAP_C_USED ) {

				/* give persistent clients a chance to cleanup */
				if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
					ldap_pvt_thread_pool_submit( &connection_pool,
					connections[i].c_clientfunc, connections[i].c_clientarg );
				} else {
					/* c_mutex is locked */
					connection_closing( &connections[i], "slapd shutdown" );
					connection_close( &connections[i] );
				}
Howard Chu's avatar
Howard Chu committed
200
			}
201
			ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
Howard Chu's avatar
Howard Chu committed
202
		}
203
204
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
205
	return 0;
206
207
}

208
209
210
211
212
/*
 * Timeout idle connections.
 */
int connections_timeout_idle(time_t now)
{
213
	int i = 0, writers = 0;
214
	ber_socket_t connindex;
215
216
	Connection* c;

Gary Williams's avatar
Gary Williams committed
217
	for( c = connection_first( &connindex );
218
219
220
		c != NULL;
		c = connection_next( c, &connindex ) )
	{
221
		/* Don't timeout a slow-running request or a persistent
Howard Chu's avatar
Howard Chu committed
222
		 * outbound connection.
223
224
225
		 */
		if(( c->c_n_ops_executing && !c->c_writewaiter)
			|| c->c_conn_state == SLAP_C_CLIENT ) {
226
227
			continue;
		}
228

229
230
		if( global_idletimeout && 
			difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
231
			/* close it */
232
			connection_closing( c, "idletimeout" );
233
234
			connection_close( c );
			i++;
235
236
			continue;
		}
237
	}
238
	connection_done( c );
239
240
241
242

	return i;
}

Howard Chu's avatar
Howard Chu committed
243
244
245
246
/* Drop all client connections */
void connections_drop()
{
	Connection* c;
247
	ber_socket_t connindex;
Howard Chu's avatar
Howard Chu committed
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262

	for( c = connection_first( &connindex );
		c != NULL;
		c = connection_next( c, &connindex ) )
	{
		/* Don't close a slow-running request or a persistent
		 * outbound connection.
		 */
		if(( c->c_n_ops_executing && !c->c_writewaiter)
			|| c->c_conn_state == SLAP_C_CLIENT ) {
			continue;
		}
		connection_closing( c, "dropping" );
		connection_close( c );
	}
263
	connection_done( c );
Howard Chu's avatar
Howard Chu committed
264
265
}

266
static Connection* connection_get( ber_socket_t s )
267
{
268
269
270
	Connection *c;

	Debug( LDAP_DEBUG_ARGS,
271
		"connection_get(%ld)\n",
272
		(long) s );
273
274
275

	assert( connections != NULL );

276
	if(s == AC_SOCKET_INVALID) return NULL;
277

Howard Chu's avatar
Howard Chu committed
278
279
	assert( s < dtblsize );
	c = &connections[s];
280

281
	if( c != NULL ) {
Kurt Zeilenga's avatar
Kurt Zeilenga committed
282
283
		ldap_pvt_thread_mutex_lock( &c->c_mutex );

284
285
		assert( c->c_struct_state != SLAP_C_UNINITIALIZED );

286
287
		if( c->c_struct_state != SLAP_C_USED ) {
			/* connection must have been closed due to resched */
288

289
			Debug( LDAP_DEBUG_CONNS,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
290
				"connection_get(%d): connection not used\n",
291
				s );
292
293
			assert( c->c_conn_state == SLAP_C_INVALID );
			assert( c->c_sd == AC_SOCKET_INVALID );
294

295
			ldap_pvt_thread_mutex_unlock( &c->c_mutex );
296
297
298
			return NULL;
		}

299
		Debug( LDAP_DEBUG_TRACE,
Pierangelo Masarati's avatar
Pierangelo Masarati committed
300
			"connection_get(%d): got connid=%lu\n",
301
			s, c->c_connid );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
302

303
304
		c->c_n_get++;

Kurt Zeilenga's avatar
Kurt Zeilenga committed
305
306
		assert( c->c_struct_state == SLAP_C_USED );
		assert( c->c_conn_state != SLAP_C_INVALID );
Howard Chu's avatar
Howard Chu committed
307
		assert( c->c_sd != AC_SOCKET_INVALID );
308

309
#ifndef SLAPD_MONITOR
310
		if ( global_idletimeout > 0 )
311
312
#endif /* ! SLAPD_MONITOR */
		{
313
314
			c->c_activitytime = slap_get_time();
		}
315
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
316

317
318
319
320
321
322
323
324
	return c;
}

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

325
Connection * connection_init(
326
	ber_socket_t s,
Pierangelo Masarati's avatar
Pierangelo Masarati committed
327
	Listener *listener,
Kurt Zeilenga's avatar
Kurt Zeilenga committed
328
329
	const char* dnsname,
	const char* peername,
330
	int flags,
331
	slap_ssf_t ssf,
Howard Chu's avatar
Howard Chu committed
332
	struct berval *authid
333
	LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
334
{
335
	unsigned long id;
336
	Connection *c;
Howard Chu's avatar
Howard Chu committed
337
	int doinit = 0;
338
	ber_socket_t sfd = SLAP_FD2SOCK(s);
Kurt Zeilenga's avatar
Kurt Zeilenga committed
339

340
341
	assert( connections != NULL );

Pierangelo Masarati's avatar
Pierangelo Masarati committed
342
	assert( listener != NULL );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
343
344
345
	assert( dnsname != NULL );
	assert( peername != NULL );

Kurt Zeilenga's avatar
Kurt Zeilenga committed
346
#ifndef HAVE_TLS
Howard Chu's avatar
Howard Chu committed
347
	assert( !( flags & CONN_IS_TLS ));
Kurt Zeilenga's avatar
Kurt Zeilenga committed
348
349
#endif

350
	if( s == AC_SOCKET_INVALID ) {
Gary Williams's avatar
Gary Williams committed
351
		Debug( LDAP_DEBUG_ANY,
352
			"connection_init: init of socket %ld invalid.\n", (long)s );
353
		return NULL;
354
355
356
	}

	assert( s >= 0 );
357
	assert( s < dtblsize );
Howard Chu's avatar
Howard Chu committed
358
	c = &connections[s];
359
360

	ldap_pvt_thread_mutex_lock( &c->c_mutex );
Howard Chu's avatar
Howard Chu committed
361
362
363
364
365
	if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
		doinit = 1;
	} else {
		assert( c->c_struct_state == SLAP_C_UNUSED );
	}
366

Howard Chu's avatar
Howard Chu committed
367
	if( doinit ) {
368
369
370
371
		c->c_send_ldap_result = slap_send_ldap_result;
		c->c_send_search_entry = slap_send_search_entry;
		c->c_send_search_reference = slap_send_search_reference;
		c->c_send_ldap_extended = slap_send_ldap_extended;
372
		c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
373

374
375
376
		BER_BVZERO( &c->c_authmech );
		BER_BVZERO( &c->c_dn );
		BER_BVZERO( &c->c_ndn );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
377

Pierangelo Masarati's avatar
Pierangelo Masarati committed
378
		c->c_listener = NULL;
379
380
		BER_BVZERO( &c->c_peer_domain );
		BER_BVZERO( &c->c_peer_name );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
381

382
383
		LDAP_STAILQ_INIT(&c->c_ops);
		LDAP_STAILQ_INIT(&c->c_pending_ops);
384

Kurt Zeilenga's avatar
Kurt Zeilenga committed
385
#ifdef LDAP_X_TXN
Kurt Zeilenga's avatar
Kurt Zeilenga committed
386
		c->c_txn = CONN_TXN_INACTIVE;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
387
388
389
390
		c->c_txn_backend = NULL;
		LDAP_STAILQ_INIT(&c->c_txn_ops);
#endif

391
		BER_BVZERO( &c->c_sasl_bind_mech );
392
393
394
		c->c_sasl_done = 0;
		c->c_sasl_authctx = NULL;
		c->c_sasl_sockctx = NULL;
395
		c->c_sasl_extra = NULL;
396
		c->c_sasl_bindop = NULL;
Howard Chu's avatar
Howard Chu committed
397
		c->c_sasl_cbind = NULL;
398

399
400
401
		c->c_sb = ber_sockbuf_alloc( );

		{
402
			ber_len_t max = sockbuf_max_incoming;
403
404
405
			ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
		}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
406
		c->c_currentber = NULL;
407

408
#ifdef LDAP_SLAPI
409
		if ( slapi_plugins_used ) {
410
			slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
411
		}
412
#endif
413
	}
414

415
416
417
	assert( BER_BVISNULL( &c->c_authmech ) );
	assert( BER_BVISNULL( &c->c_dn ) );
	assert( BER_BVISNULL( &c->c_ndn ) );
Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
418
	assert( c->c_listener == NULL );
419
420
	assert( BER_BVISNULL( &c->c_peer_domain ) );
	assert( BER_BVISNULL( &c->c_peer_name ) );
Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
421
422
	assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
	assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
423
#ifdef LDAP_X_TXN
Kurt Zeilenga's avatar
Kurt Zeilenga committed
424
	assert( c->c_txn == CONN_TXN_INACTIVE );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
425
426
427
	assert( c->c_txn_backend == NULL );
	assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
#endif
428
	assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
429
430
431
	assert( c->c_sasl_done == 0 );
	assert( c->c_sasl_authctx == NULL );
	assert( c->c_sasl_sockctx == NULL );
432
	assert( c->c_sasl_extra == NULL );
433
	assert( c->c_sasl_bindop == NULL );
Howard Chu's avatar
Howard Chu committed
434
	assert( c->c_sasl_cbind == NULL );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
435
	assert( c->c_currentber == NULL );
436
	assert( c->c_writewaiter == 0);
437
	assert( c->c_writers == 0);
438

Pierangelo Masarati's avatar
Pierangelo Masarati committed
439
	c->c_listener = listener;
Howard Chu's avatar
Howard Chu committed
440
	c->c_sd = s;
441

Howard Chu's avatar
Howard Chu committed
442
	if ( flags & CONN_IS_CLIENT ) {
443
		c->c_connid = 0;
444
		ldap_pvt_thread_mutex_lock( &connections_mutex );
445
		c->c_conn_state = SLAP_C_CLIENT;
446
		c->c_struct_state = SLAP_C_USED;
447
		ldap_pvt_thread_mutex_unlock( &connections_mutex );
448
		c->c_close_reason = "?";			/* should never be needed */
449
		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
450
451
		ldap_pvt_thread_mutex_unlock( &c->c_mutex );

452
		return c;
453
454
	}

455
456
	ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
	ber_str2bv( peername, 0, 1, &c->c_peer_name );
457

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
458
459
460
461
	c->c_n_ops_received = 0;
	c->c_n_ops_executing = 0;
	c->c_n_ops_pending = 0;
	c->c_n_ops_completed = 0;
462
463
464
465

	c->c_n_get = 0;
	c->c_n_read = 0;
	c->c_n_write = 0;
466

467
468
	/* set to zero until bind, implies LDAP_VERSION3 */
	c->c_protocol = 0;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
469

470
#ifndef SLAPD_MONITOR
471
	if ( global_idletimeout > 0 )
472
473
#endif /* ! SLAPD_MONITOR */
	{
474
475
		c->c_activitytime = c->c_starttime = slap_get_time();
	}
476

477
478
#ifdef LDAP_CONNECTIONLESS
	c->c_is_udp = 0;
Howard Chu's avatar
Howard Chu committed
479
	if( flags & CONN_IS_UDP ) {
480
481
		c->c_is_udp = 1;
#ifdef LDAP_DEBUG
Kurt Zeilenga's avatar
Kurt Zeilenga committed
482
483
		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
			LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
484
#endif
Kurt Zeilenga's avatar
Kurt Zeilenga committed
485
		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
486
			LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
487
488
		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
			LBER_SBIOD_LEVEL_PROVIDER, NULL );
489
	} else
Howard Chu's avatar
Howard Chu committed
490
491
492
493
494
495
#endif /* LDAP_CONNECTIONLESS */
#ifdef LDAP_PF_LOCAL
	if ( flags & CONN_IS_IPC ) {
#ifdef LDAP_DEBUG
		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
			LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
496
#endif
Howard Chu's avatar
Howard Chu committed
497
		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
498
			LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
Howard Chu's avatar
Howard Chu committed
499
500
501
502
503
504
#ifdef LDAP_PF_LOCAL_SENDMSG
		if ( !BER_BVISEMPTY( peerbv ))
			ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
#endif
	} else
#endif /* LDAP_PF_LOCAL */
505
	{
506
#ifdef LDAP_DEBUG
Kurt Zeilenga's avatar
Kurt Zeilenga committed
507
508
		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
			LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
509
#endif
Kurt Zeilenga's avatar
Kurt Zeilenga committed
510
		ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
511
			LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
512
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
513
514
515
516

#ifdef LDAP_DEBUG
	ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
		INT_MAX, (void*)"ldap_" );
517
#endif
518

Kurt Zeilenga's avatar
Kurt Zeilenga committed
519
520
521
522
523
	if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
		c /* non-NULL */ ) < 0 )
	{
		Debug( LDAP_DEBUG_ANY,
			"connection_init(%d, %s): set nonblocking failed\n",
524
			s, c->c_peer_name.bv_val );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
525
	}
526

527
	ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
528
	id = c->c_connid = conn_nextid++;
529
	ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
530

531
	ldap_pvt_thread_mutex_lock( &connections_mutex );
532
	c->c_conn_state = SLAP_C_INACTIVE;
Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
533
	c->c_struct_state = SLAP_C_USED;
534
	ldap_pvt_thread_mutex_unlock( &connections_mutex );
535
	c->c_close_reason = "?";			/* should never be needed */
536

537
	c->c_ssf = c->c_transport_ssf = ssf;
538
	c->c_tls_ssf = c->c_sasl_ssf = 0;
539

Kurt Zeilenga's avatar
Kurt Zeilenga committed
540
#ifdef HAVE_TLS
Howard Chu's avatar
Howard Chu committed
541
	if ( flags & CONN_IS_TLS ) {
Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
542
543
544
545
546
547
		c->c_is_tls = 1;
		c->c_needs_tls_accept = 1;
	} else {
		c->c_is_tls = 0;
		c->c_needs_tls_accept = 0;
	}
Kurt Zeilenga's avatar
Kurt Zeilenga committed
548
#endif
549

550
	slap_sasl_open( c, 0 );
551
	slap_sasl_external( c, ssf, authid );
552

553
	slapd_add_internal( s, 1 );
554

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
555
	backend_connection_init(c);
556
	ldap_pvt_thread_mutex_unlock( &c->c_mutex );
557

558
	if ( !(flags & CONN_IS_UDP ))
559
		Debug( LDAP_DEBUG_STATS,
560
			"conn=%ld fd=%ld ACCEPT from %s (%s)\n",
561
			id, (long) s, peername, listener->sl_name.bv_val );
562

563
	return c;
564
565
}

566
567
void connection2anonymous( Connection *c )
{
568
569
	assert( connections != NULL );
	assert( c != NULL );
570

571
	{
572
		ber_len_t max = sockbuf_max_incoming;
573
574
575
		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
	}

576
	if ( !BER_BVISNULL( &c->c_authmech ) ) {
577
		ch_free(c->c_authmech.bv_val);
578
	}
579
	BER_BVZERO( &c->c_authmech );
580

581
	if ( !BER_BVISNULL( &c->c_dn ) ) {
582
		ch_free(c->c_dn.bv_val);
583
	}
584
	BER_BVZERO( &c->c_dn );
585

586
	if ( !BER_BVISNULL( &c->c_ndn ) ) {
587
		ch_free(c->c_ndn.bv_val);
588
	}
589
	BER_BVZERO( &c->c_ndn );
590

591
592
	if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
		ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
593
594
	}
	BER_BVZERO( &c->c_sasl_authz_dn );
595
596
597
598

	c->c_authz_backend = NULL;
}

599
600
601
static void
connection_destroy( Connection *c )
{
Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
602
	unsigned long	connid;
603
	const char		*close_reason;
Howard Chu's avatar
Howard Chu committed
604
	Sockbuf			*sb;
Howard Chu's avatar
Howard Chu committed
605
	ber_socket_t	sd;
606

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
607
608
609
610
611
	assert( connections != NULL );
	assert( c != NULL );
	assert( c->c_struct_state != SLAP_C_UNUSED );
	assert( c->c_conn_state != SLAP_C_INVALID );
	assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
612
613
614
615
616
617
	assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
#ifdef LDAP_X_TXN
	assert( c->c_txn == CONN_TXN_INACTIVE );
	assert( c->c_txn_backend == NULL );
	assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
#endif
618
	assert( c->c_writewaiter == 0);
619
	assert( c->c_writers == 0);
620

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
621
622
	/* only for stats (print -1 as "%lu" may give unexpected results ;) */
	connid = c->c_connid;
623
	close_reason = c->c_close_reason;
Pierangelo Masarati's avatar
Pierangelo Masarati committed
624

Howard Chu's avatar
Howard Chu committed
625
626
627
628
	ldap_pvt_thread_mutex_lock( &connections_mutex );
	c->c_struct_state = SLAP_C_PENDING;
	ldap_pvt_thread_mutex_unlock( &connections_mutex );

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
629
	backend_connection_destroy(c);
630

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
631
632
	c->c_protocol = 0;
	c->c_connid = -1;
633

Kurt Zeilenga's avatar
cleanup    
Kurt Zeilenga committed
634
	c->c_activitytime = c->c_starttime = 0;
635

636
	connection2anonymous( c );
Pierangelo Masarati's avatar
Pierangelo Masarati committed
637
	c->c_listener = NULL;
638

639
640
	if(c->c_peer_domain.bv_val != NULL) {
		free(c->c_peer_domain.bv_val);
Kurt Zeilenga's avatar
Kurt Zeilenga committed
641
	}
642
	BER_BVZERO( &c->c_peer_domain );
643
644
	if(c->c_peer_name.bv_val != NULL) {
		free(c->c_peer_name.bv_val);
645
	}
646
	BER_BVZERO( &c->c_peer_name );
647

648
	c->c_sasl_bind_in_progress = 0;
649
650
	if(c->c_sasl_bind_mech.bv_val != NULL) {
		free(c->c_sasl_bind_mech.bv_val);
651
	}
652
	BER_BVZERO( &c->c_sasl_bind_mech );
653
654

	slap_sasl_close( c );
655

Kurt Zeilenga's avatar
Kurt Zeilenga committed
656
657
658
659
660
	if ( c->c_currentber != NULL ) {
		ber_free( c->c_currentber, 1 );
		c->c_currentber = NULL;
	}

661

Howard Chu's avatar
Howard Chu committed
662
663
664
665
#ifdef LDAP_SLAPI
	/* call destructors, then constructors; avoids unnecessary allocation */
	if ( slapi_plugins_used ) {
		slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
666
	}
Howard Chu's avatar
Howard Chu committed
667
#endif
668

Howard Chu's avatar
Howard Chu committed
669
670
	sd = c->c_sd;
	c->c_sd = AC_SOCKET_INVALID;
Howard Chu's avatar
Howard Chu committed
671
	c->c_close_reason = "?";			/* should never be needed */
672

Howard Chu's avatar
Howard Chu committed
673
674
	sb = c->c_sb;
	c->c_sb = ber_sockbuf_alloc( );
675
	{
676
		ber_len_t max = sockbuf_max_incoming;
677
678
		ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
	}
Howard Chu's avatar
Howard Chu committed
679
680
	c->c_conn_state = SLAP_C_INVALID;
	c->c_struct_state = SLAP_C_UNUSED;
681

Howard Chu's avatar
Howard Chu committed
682
683
684
	/* c must be fully reset by this point; when we call slapd_remove
	 * it may get immediately reused by a new connection.
	 */
Howard Chu's avatar
Howard Chu committed
685
686
	if ( sd != AC_SOCKET_INVALID ) {
		slapd_remove( sd, sb, 1, 0, 0 );
Howard Chu's avatar
Howard Chu committed
687

688
		if ( close_reason == NULL ) {
689
690
			Debug( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
				connid, (long) sd );
Quanah Gibson-Mount's avatar
Quanah Gibson-Mount committed
691
		} else {
692
693
			Debug( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
				connid, (long) sd, close_reason );
694
		}
695
	}
696
697
}

698
int connection_valid( Connection *c )
699
{
700
701
	/* c_mutex must be locked by caller */

702
	assert( c != NULL );
703

704
705
706
	return c->c_struct_state == SLAP_C_USED &&
		c->c_conn_state >= SLAP_C_ACTIVE &&
		c->c_conn_state <= SLAP_C_CLIENT;
707
708
}

709
710
711
712
static void connection_abandon( Connection *c )
{
	/* c_mutex must be locked by caller */

713
	Operation *o, *next, op = {0};
Howard Chu's avatar
Howard Chu committed
714
	Opheader ohdr = {0};
715

Howard Chu's avatar
Howard Chu committed
716
717
718
	op.o_hdr = &ohdr;
	op.o_conn = c;
	op.o_connid = c->c_connid;
719
	op.o_tag = LDAP_REQ_ABANDON;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
720

721
	for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
722
723
		SlapReply rs = {REP_RESULT};

724
		next = LDAP_STAILQ_NEXT( o, o_next );
725
726
727
		/* don't abandon an op twice */
		if ( o->o_abandon )
			continue;
728
		op.orn_msgid = o->o_msgid;
729
		o->o_abandon = 1;
Pierangelo Masarati's avatar
Pierangelo Masarati committed
730
		op.o_bd = frontendDB;
731
		frontendDB->be_abandon( &op, &rs );
732
733
	}

Kurt Zeilenga's avatar
Kurt Zeilenga committed
734
735
736
737
738
#ifdef LDAP_X_TXN
	/* remove operations in pending transaction */
	while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
		LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
		LDAP_STAILQ_NEXT(o, o_next) = NULL;
Howard Chu's avatar
Howard Chu committed
739
		slap_op_free( o, NULL );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
740
741
742
743
744
745
746
	}

	/* clear transaction */
	c->c_txn_backend = NULL;
	c->c_txn = CONN_TXN_INACTIVE;
#endif

747
	/* remove pending operations */
748
749
750
	while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
		LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
		LDAP_STAILQ_NEXT(o, o_next) = NULL;
Howard Chu's avatar
Howard Chu committed
751
		slap_op_free( o, NULL );
752
753
754
	}
}

755
756
757
758
759
760
761
762
763
764
static void
connection_wake_writers( Connection *c )
{
	/* wake write blocked operations */
	ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
	if ( c->c_writers > 0 ) {
		c->c_writers = -c->c_writers;
		ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
		ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
		if ( c->c_writewaiter ) {
Howard Chu's avatar
Howard Chu committed
765
			slapd_shutsock( c->c_sd );
766
767
768
769
770
771
772
773
774
775
776
777
		}
		ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
		while ( c->c_writers ) {
			ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
		}
		ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
	} else {
		ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
		slapd_clr_write( c->c_sd, 1 );
	}
}

778
void connection_closing( Connection *c, const char *why )
779
780
781
{
	assert( connections != NULL );
	assert( c != NULL );
Howard Chu's avatar
Howard Chu committed
782
783
784

	if ( c->c_struct_state != SLAP_C_USED ) return;

785
786
	assert( c->c_conn_state != SLAP_C_INVALID );

787
788
	/* c_mutex must be locked by caller */

789
	if( c->c_conn_state != SLAP_C_CLOSING ) {
790
		Debug( LDAP_DEBUG_CONNS,
Pierangelo Masarati's avatar
Pierangelo Masarati committed
791
			"connection_closing: readying conn=%lu sd=%d for close\n",
792
			c->c_connid, c->c_sd );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
793
794
		/* update state to closing */
		c->c_conn_state = SLAP_C_CLOSING;
795
		c->c_close_reason = why;
Kurt Zeilenga's avatar
Kurt Zeilenga committed
796

797
		/* don't listen on this port anymore */
Howard Chu's avatar
Howard Chu committed
798
		slapd_clr_read( c->c_sd, 0 );
799
800

		/* abandon active operations */
801
		connection_abandon( c );
802
803

		/* wake write blocked operations */
804
		connection_wake_writers( c );
Kurt Zeilenga's avatar
Kurt Zeilenga committed
805

806
807
808
	} else if( why == NULL && c->c_close_reason == conn_lost_str ) {
		/* Client closed connection after doing Unbind. */
		c->c_close_reason = NULL;
809
810
811
	}
}

812
813
static void
connection_close( Connection *c )
814
815
816
{
	assert( connections != NULL );
	assert( c != NULL );
Howard Chu's avatar
Howard Chu committed
817
818
819

	if ( c->c_struct_state != SLAP_C_USED ) return;

Howard Chu's avatar
Howard Chu committed
820
	assert( c->c_conn_state == SLAP_C_CLOSING );
821

822
	/* NOTE: c_mutex should be locked by caller */
823

Pierangelo Masarati's avatar