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openldap/servers/slapd/connection.c

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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2009 The OpenLDAP Foundation.
* 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.
*/
#include "portable.h"
#include <stdio.h>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#include <ac/socket.h>
#include <ac/errno.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include "lutil.h"
#include "slap.h"
#ifdef LDAP_SLAPI
#include "slapi/slapi.h"
#endif
/* protected by connections_mutex */
static ldap_pvt_thread_mutex_t connections_mutex;
static Connection *connections = NULL;
static ldap_pvt_thread_mutex_t conn_nextid_mutex;
static unsigned long conn_nextid = 0;
static const char conn_lost_str[] = "connection lost";
/* structure state (protected by connections_mutex) */
enum sc_struct_state {
SLAP_C_UNINITIALIZED = 0, /* MUST BE ZERO (0) */
SLAP_C_UNUSED,
SLAP_C_USED,
SLAP_C_PENDING
};
/* connection state (protected by c_mutex ) */
enum sc_conn_state {
SLAP_C_INVALID = 0, /* MUST BE ZERO (0) */
SLAP_C_INACTIVE, /* zero threads */
SLAP_C_CLOSING, /* closing */
SLAP_C_ACTIVE, /* one or more threads */
SLAP_C_BINDING, /* binding */
SLAP_C_CLIENT /* outbound client conn */
};
const char *
connection_state2str( int state )
{
switch( state ) {
case SLAP_C_INVALID: return "!";
case SLAP_C_INACTIVE: return "|";
case SLAP_C_CLOSING: return "C";
case SLAP_C_ACTIVE: return "";
case SLAP_C_BINDING: return "B";
case SLAP_C_CLIENT: return "L";
}
return "?";
}
static Connection* connection_get( ber_socket_t s );
typedef struct conn_readinfo {
Operation *op;
ldap_pvt_thread_start_t *func;
void *arg;
void *ctx;
int nullop;
} conn_readinfo;
static int connection_input( Connection *c, conn_readinfo *cri );
static void connection_close( Connection *c );
static int connection_op_activate( Operation *op );
static void connection_op_queue( Operation *op );
static int connection_resched( Connection *conn );
static void connection_abandon( Connection *conn );
static void connection_destroy( Connection *c );
static ldap_pvt_thread_start_t connection_operation;
/*
* Initialize connection management infrastructure.
*/
int connections_init(void)
{
int i;
assert( connections == NULL );
if( connections != NULL) {
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 );
ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
connections = (Connection *) ch_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;
}
assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
/*
* per entry initialization of the Connection array initialization
* will be done by connection_init()
*/
return 0;
}
/*
* Destroy connection management infrastructure.
*/
int connections_destroy(void)
{
ber_socket_t 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++ ) {
if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
ber_sockbuf_free( connections[i].c_sb );
ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
ldap_pvt_thread_mutex_destroy( &connections[i].c_write2_mutex );
ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
ldap_pvt_thread_cond_destroy( &connections[i].c_write2_cv );
#ifdef LDAP_SLAPI
if ( slapi_plugins_used ) {
slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
&connections[i] );
}
#endif
}
}
free( connections );
connections = NULL;
ldap_pvt_thread_mutex_destroy( &connections_mutex );
ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
return 0;
}
/*
* shutdown all connections
*/
int connections_shutdown(void)
{
ber_socket_t i;
for ( i = 0; i < dtblsize; i++ ) {
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] );
}
}
ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
}
}
return 0;
}
/*
* Timeout idle connections.
*/
int connections_timeout_idle(time_t now)
{
int i = 0, writers = 0;
int connindex;
Connection* c;
time_t old;
old = slapd_get_writetime();
for( c = connection_first( &connindex );
c != NULL;
c = connection_next( c, &connindex ) )
{
/* Don't timeout a slow-running request or a persistent
* outbound connection. But if it has a writewaiter, see
* if the waiter has been there too long.
*/
if(( c->c_n_ops_executing && !c->c_writewaiter)
|| c->c_conn_state == SLAP_C_CLIENT ) {
continue;
}
if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
/* close it */
connection_closing( c, "idletimeout" );
connection_close( c );
i++;
continue;
}
if ( c->c_writewaiter ) {
writers = 1;
if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
/* close it */
connection_closing( c, "writetimeout" );
connection_close( c );
i++;
}
}
}
connection_done( c );
if ( !writers )
slapd_clr_writetime( old );
return i;
}
static Connection* connection_get( ber_socket_t s )
{
Connection *c;
Debug( LDAP_DEBUG_ARGS,
"connection_get(%ld)\n",
(long) s, 0, 0 );
assert( connections != NULL );
if(s == AC_SOCKET_INVALID) return NULL;
assert( s < dtblsize );
c = &connections[s];
if( c != NULL ) {
ldap_pvt_thread_mutex_lock( &c->c_mutex );
assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
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( c->c_sd == AC_SOCKET_INVALID );
Debug( LDAP_DEBUG_CONNS,
"connection_get(%d): connection not used\n",
s, 0, 0 );
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
return NULL;
}
Debug( LDAP_DEBUG_TRACE,
"connection_get(%d): got connid=%lu\n",
s, c->c_connid, 0 );
c->c_n_get++;
assert( c->c_struct_state == SLAP_C_USED );
assert( c->c_conn_state != SLAP_C_INVALID );
assert( c->c_sd != AC_SOCKET_INVALID );
#ifndef SLAPD_MONITOR
if ( global_idletimeout > 0 )
#endif /* ! SLAPD_MONITOR */
{
c->c_activitytime = slap_get_time();
}
}
return c;
}
static void connection_return( Connection *c )
{
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
}
Connection * connection_init(
ber_socket_t s,
Listener *listener,
const char* dnsname,
const char* peername,
int flags,
slap_ssf_t ssf,
struct berval *authid
LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
{
unsigned long id;
Connection *c;
int doinit = 0;
ber_socket_t sfd = SLAP_FD2SOCK(s);
assert( connections != NULL );
assert( listener != NULL );
assert( dnsname != NULL );
assert( peername != NULL );
#ifndef HAVE_TLS
assert( !( flags & CONN_IS_TLS ));
#endif
if( s == AC_SOCKET_INVALID ) {
Debug( LDAP_DEBUG_ANY,
"connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
return NULL;
}
assert( s >= 0 );
assert( s < dtblsize );
c = &connections[s];
if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
doinit = 1;
} else {
assert( c->c_struct_state == SLAP_C_UNUSED );
}
if( doinit ) {
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;
c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
BER_BVZERO( &c->c_authmech );
BER_BVZERO( &c->c_dn );
BER_BVZERO( &c->c_ndn );
c->c_listener = NULL;
BER_BVZERO( &c->c_peer_domain );
BER_BVZERO( &c->c_peer_name );
LDAP_STAILQ_INIT(&c->c_ops);
LDAP_STAILQ_INIT(&c->c_pending_ops);
#ifdef LDAP_X_TXN
c->c_txn = CONN_TXN_INACTIVE;
c->c_txn_backend = NULL;
LDAP_STAILQ_INIT(&c->c_txn_ops);
#endif
BER_BVZERO( &c->c_sasl_bind_mech );
c->c_sasl_done = 0;
c->c_sasl_authctx = NULL;
c->c_sasl_sockctx = NULL;
c->c_sasl_extra = NULL;
c->c_sasl_bindop = NULL;
c->c_sb = ber_sockbuf_alloc( );
{
ber_len_t max = sockbuf_max_incoming;
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
}
c->c_currentber = NULL;
/* should check status of thread calls */
ldap_pvt_thread_mutex_init( &c->c_mutex );
ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
ldap_pvt_thread_cond_init( &c->c_write1_cv );
ldap_pvt_thread_cond_init( &c->c_write2_cv );
#ifdef LDAP_SLAPI
if ( slapi_plugins_used ) {
slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
}
#endif
}
ldap_pvt_thread_mutex_lock( &c->c_mutex );
assert( BER_BVISNULL( &c->c_authmech ) );
assert( BER_BVISNULL( &c->c_dn ) );
assert( BER_BVISNULL( &c->c_ndn ) );
assert( c->c_listener == NULL );
assert( BER_BVISNULL( &c->c_peer_domain ) );
assert( BER_BVISNULL( &c->c_peer_name ) );
assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
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
assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
assert( c->c_sasl_done == 0 );
assert( c->c_sasl_authctx == NULL );
assert( c->c_sasl_sockctx == NULL );
assert( c->c_sasl_extra == NULL );
assert( c->c_sasl_bindop == NULL );
assert( c->c_currentber == NULL );
assert( c->c_writewaiter == 0);
assert( c->c_writers == 0);
c->c_listener = listener;
c->c_sd = s;
if ( flags & CONN_IS_CLIENT ) {
c->c_connid = 0;
ldap_pvt_thread_mutex_lock( &connections_mutex );
c->c_conn_state = SLAP_C_CLIENT;
c->c_struct_state = SLAP_C_USED;
ldap_pvt_thread_mutex_unlock( &connections_mutex );
c->c_close_reason = "?"; /* should never be needed */
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
return c;
}
ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
ber_str2bv( peername, 0, 1, &c->c_peer_name );
c->c_n_ops_received = 0;
c->c_n_ops_executing = 0;
c->c_n_ops_pending = 0;
c->c_n_ops_completed = 0;
c->c_n_get = 0;
c->c_n_read = 0;
c->c_n_write = 0;
/* set to zero until bind, implies LDAP_VERSION3 */
c->c_protocol = 0;
#ifndef SLAPD_MONITOR
if ( global_idletimeout > 0 )
#endif /* ! SLAPD_MONITOR */
{
c->c_activitytime = c->c_starttime = slap_get_time();
}
#ifdef LDAP_CONNECTIONLESS
c->c_is_udp = 0;
if( flags & CONN_IS_UDP ) {
c->c_is_udp = 1;
#ifdef LDAP_DEBUG
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
#endif
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
LBER_SBIOD_LEVEL_PROVIDER, NULL );
} else
#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_" );
#endif
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
#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 */
{
#ifdef LDAP_DEBUG
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
#endif
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
}
#ifdef LDAP_DEBUG
ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
INT_MAX, (void*)"ldap_" );
#endif
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",
s, c->c_peer_name.bv_val, 0 );
}
ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
id = c->c_connid = conn_nextid++;
ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
ldap_pvt_thread_mutex_lock( &connections_mutex );
c->c_conn_state = SLAP_C_INACTIVE;
c->c_struct_state = SLAP_C_USED;
ldap_pvt_thread_mutex_unlock( &connections_mutex );
c->c_close_reason = "?"; /* should never be needed */
c->c_ssf = c->c_transport_ssf = ssf;
c->c_tls_ssf = 0;
#ifdef HAVE_TLS
if ( flags & CONN_IS_TLS ) {
c->c_is_tls = 1;
c->c_needs_tls_accept = 1;
} else {
c->c_is_tls = 0;
c->c_needs_tls_accept = 0;
}
#endif
slap_sasl_open( c, 0 );
slap_sasl_external( c, ssf, authid );
slapd_add_internal( s, 1 );
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
backend_connection_init(c);
return c;
}
void connection2anonymous( Connection *c )
{
assert( connections != NULL );
assert( c != NULL );
{
ber_len_t max = sockbuf_max_incoming;
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
}
if ( !BER_BVISNULL( &c->c_authmech ) ) {
ch_free(c->c_authmech.bv_val);
}
BER_BVZERO( &c->c_authmech );
if ( !BER_BVISNULL( &c->c_dn ) ) {
ch_free(c->c_dn.bv_val);
}
BER_BVZERO( &c->c_dn );
if ( !BER_BVISNULL( &c->c_ndn ) ) {
ch_free(c->c_ndn.bv_val);
}
BER_BVZERO( &c->c_ndn );
if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
}
BER_BVZERO( &c->c_sasl_authz_dn );
c->c_authz_backend = NULL;
}
static void
connection_destroy( Connection *c )
{
unsigned long connid;
const char *close_reason;
Sockbuf *sb;
ber_socket_t sd;
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) );
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
assert( c->c_writewaiter == 0);
assert( c->c_writers == 0);
/* only for stats (print -1 as "%lu" may give unexpected results ;) */
connid = c->c_connid;
close_reason = c->c_close_reason;
ldap_pvt_thread_mutex_lock( &connections_mutex );
c->c_struct_state = SLAP_C_PENDING;
ldap_pvt_thread_mutex_unlock( &connections_mutex );
backend_connection_destroy(c);
c->c_protocol = 0;
c->c_connid = -1;
c->c_activitytime = c->c_starttime = 0;
connection2anonymous( c );
c->c_listener = NULL;
if(c->c_peer_domain.bv_val != NULL) {
free(c->c_peer_domain.bv_val);
}
BER_BVZERO( &c->c_peer_domain );
if(c->c_peer_name.bv_val != NULL) {
free(c->c_peer_name.bv_val);
}
BER_BVZERO( &c->c_peer_name );
c->c_sasl_bind_in_progress = 0;
if(c->c_sasl_bind_mech.bv_val != NULL) {
free(c->c_sasl_bind_mech.bv_val);
}
BER_BVZERO( &c->c_sasl_bind_mech );
slap_sasl_close( c );
if ( c->c_currentber != NULL ) {
ber_free( c->c_currentber, 1 );
c->c_currentber = NULL;
}
#ifdef LDAP_SLAPI
/* call destructors, then constructors; avoids unnecessary allocation */
if ( slapi_plugins_used ) {
slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
}
#endif
sd = c->c_sd;
c->c_sd = AC_SOCKET_INVALID;
c->c_conn_state = SLAP_C_INVALID;
c->c_struct_state = SLAP_C_UNUSED;
c->c_close_reason = "?"; /* should never be needed */
sb = c->c_sb;
c->c_sb = ber_sockbuf_alloc( );
{
ber_len_t max = sockbuf_max_incoming;
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
}
/* c must be fully reset by this point; when we call slapd_remove
* it may get immediately reused by a new connection.
*/
if ( sd != AC_SOCKET_INVALID ) {
slapd_remove( sd, sb, 1, 0, 0 );
if ( close_reason == NULL ) {
Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
connid, (long) sd, 0, 0, 0 );
} else {
Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
connid, (long) sd, close_reason, 0, 0 );
}
}
}
int connection_valid( Connection *c )
{
/* c_mutex must be locked by caller */
assert( c != NULL );
return c->c_struct_state == SLAP_C_USED &&
c->c_conn_state >= SLAP_C_ACTIVE &&
c->c_conn_state <= SLAP_C_CLIENT;
}
static void connection_abandon( Connection *c )
{
/* c_mutex must be locked by caller */
Operation *o, *next, op = {0};
Opheader ohdr = {0};
SlapReply rs = {0};
op.o_hdr = &ohdr;
op.o_conn = c;
op.o_connid = c->c_connid;
op.o_tag = LDAP_REQ_ABANDON;
for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
next = LDAP_STAILQ_NEXT( o, o_next );
op.orn_msgid = o->o_msgid;
o->o_abandon = 1;
op.o_bd = frontendDB;
frontendDB->be_abandon( &op, &rs );
}
#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;
slap_op_free( o, NULL );
}
/* clear transaction */
c->c_txn_backend = NULL;
c->c_txn = CONN_TXN_INACTIVE;
#endif
/* remove pending operations */
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;
slap_op_free( o, NULL );
}
}
void connection_closing( Connection *c, const char *why )
{
assert( connections != NULL );
assert( c != NULL );
assert( c->c_struct_state == SLAP_C_USED );
assert( c->c_conn_state != SLAP_C_INVALID );
/* c_mutex must be locked by caller */
if( c->c_conn_state != SLAP_C_CLOSING ) {
Debug( LDAP_DEBUG_CONNS,
"connection_closing: readying conn=%lu sd=%d for close\n",
c->c_connid, c->c_sd, 0 );
/* update state to closing */
c->c_conn_state = SLAP_C_CLOSING;
c->c_close_reason = why;
/* don't listen on this port anymore */
slapd_clr_read( c->c_sd, 0 );
/* abandon active operations */
connection_abandon( 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 ) {
ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
ldap_pvt_thread_cond_signal( &c->c_write2_cv );
slapd_clr_write( c->c_sd, 1 );
ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
}
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 );
}
} else if( why == NULL && c->c_close_reason == conn_lost_str ) {
/* Client closed connection after doing Unbind. */
c->c_close_reason = NULL;
}
}
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 );
/* NOTE: c_mutex should be locked by caller */
if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
!LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
{
Debug( LDAP_DEBUG_CONNS,
"connection_close: deferring conn=%lu sd=%d\n",
c->c_connid, c->c_sd, 0 );
return;
}
Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
c->c_connid, c->c_sd, 0 );
connection_destroy( c );
}
unsigned long connections_nextid(void)
{
unsigned long id;
assert( connections != NULL );
ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
id = conn_nextid;
ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
return id;
}
Connection* connection_first( ber_socket_t *index )
{
assert( connections != NULL );
assert( index != NULL );
ldap_pvt_thread_mutex_lock( &connections_mutex );
for( *index = 0; *index < dtblsize; (*index)++) {
if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
break;
}
}
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return connection_next(NULL, index);
}
Connection* connection_next( Connection *c, ber_socket_t *index )
{
assert( connections != NULL );
assert( index != NULL );
assert( *index <= dtblsize );
if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
c = NULL;
ldap_pvt_thread_mutex_lock( &connections_mutex );
for(; *index < dtblsize; (*index)++) {
int c_struct;
if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
/* FIXME: accessing c_conn_state without locking c_mutex */
assert( connections[*index].c_conn_state == SLAP_C_INVALID );
continue;
}
if( connections[*index].c_struct_state == SLAP_C_USED ) {
c = &connections[(*index)++];
if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
/* avoid deadlock */
ldap_pvt_thread_mutex_unlock( &connections_mutex );
ldap_pvt_thread_mutex_lock( &c->c_mutex );
ldap_pvt_thread_mutex_lock( &connections_mutex );
if ( c->c_struct_state != SLAP_C_USED ) {
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
c = NULL;
continue;
}
}
assert( c->c_conn_state != SLAP_C_INVALID );
break;
}
c_struct = connections[*index].c_struct_state;
if ( c_struct == SLAP_C_PENDING )
continue;
assert( c_struct == SLAP_C_UNUSED );
/* FIXME: accessing c_conn_state without locking c_mutex */
assert( connections[*index].c_conn_state == SLAP_C_INVALID );
}
ldap_pvt_thread_mutex_unlock( &connections_mutex );
return c;
}
void connection_done( Connection *c )
{
assert( connections != NULL );
if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
}
/*
* 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.
*/
#ifdef SLAPD_MONITOR
/* FIXME: returns 0 in case of failure */
#define INCR_OP_INITIATED(index) \
do { \
ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
} while (0)
#define INCR_OP_COMPLETED(index) \
do { \
ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
} while (0)
#else /* !SLAPD_MONITOR */
#define INCR_OP_INITIATED(index) do { } while (0)
#define INCR_OP_COMPLETED(index) \
do { \
ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
} while (0)
#endif /* !SLAPD_MONITOR */
/*
* NOTE: keep in sync with enum in slapd.h
*/
static BI_op_func *opfun[] = {
do_bind,
do_unbind,
do_search,
do_compare,
do_modify,
do_modrdn,
do_add,
do_delete,
do_abandon,
do_extended,
NULL
};
/* Counters are per-thread, not per-connection.
*/
static void
conn_counter_destroy( void *key, void *data )
{
slap_counters_t **prev, *sc;
ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
prev = &sc->sc_next, sc = sc->sc_next ) {
if ( sc == data ) {
int i;
*prev = sc->sc_next;
/* Copy data to main counter */
ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
#ifdef SLAPD_MONITOR
for ( i = 0; i < SLAP_OP_LAST; i++ ) {
ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
}
#endif /* SLAPD_MONITOR */
slap_counters_destroy( sc );
ber_memfree_x( data, NULL );
break;
}
}
ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
}
static void
conn_counter_init( Operation *op, void *ctx )
{
slap_counters_t *sc;
void *vsc = NULL;
if ( ldap_pvt_thread_pool_getkey(
ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
vsc = ch_malloc( sizeof( slap_counters_t ));
sc = vsc;
slap_counters_init( sc );
ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
conn_counter_destroy, NULL, NULL );
ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
sc->sc_next = slap_counters.sc_next;
slap_counters.sc_next = sc;
ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
}
op->o_counters = vsc;
}
static void *
connection_operation( void *ctx, void *arg_v )
{
int rc = LDAP_OTHER, cancel;
Operation *op = arg_v;
SlapReply rs = {REP_RESULT};
ber_tag_t tag = op->o_tag;
slap_op_t opidx = SLAP_OP_LAST;
Connection *conn = op->o_conn;
void *memctx = NULL;
void *memctx_null = NULL;
ber_len_t memsiz;
conn_counter_init( op, ctx );
ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
/* FIXME: returns 0 in case of failure */
ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
op->o_threadctx = ctx;
op->o_tid = ldap_pvt_thread_pool_tid( ctx );
switch ( tag ) {
case LDAP_REQ_BIND:
case LDAP_REQ_UNBIND:
case LDAP_REQ_ADD:
case LDAP_REQ_DELETE:
case LDAP_REQ_MODDN:
case LDAP_REQ_MODIFY:
case LDAP_REQ_COMPARE:
case LDAP_REQ_SEARCH:
case LDAP_REQ_ABANDON:
case LDAP_REQ_EXTENDED:
break;
default:
Debug( LDAP_DEBUG_ANY, "connection_operation: "
"conn %lu unknown LDAP request 0x%lx\n",
conn->c_connid, tag, 0 );
op->o_tag = LBER_ERROR;
rs.sr_err = LDAP_PROTOCOL_ERROR;
rs.sr_text = "unknown LDAP request";
send_ldap_disconnect( op, &rs );
rc = SLAPD_DISCONNECT;
goto operations_error;
}
if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
Debug( LDAP_DEBUG_ANY, "connection_operation: "
"error: SASL bind in progress (tag=%ld).\n",
(long) tag, 0, 0 );
send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
"SASL bind in progress" );
rc = LDAP_OPERATIONS_ERROR;
goto operations_error;
}
#ifdef LDAP_X_TXN
if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
( tag == LDAP_REQ_ADD ) ||
( tag == LDAP_REQ_DELETE ) ||
( tag == LDAP_REQ_MODIFY ) ||
( tag == LDAP_REQ_MODRDN )))
{
/* Disable SLAB allocator for all update operations
issued inside of a transaction */
op->o_tmpmemctx = NULL;
op->o_tmpmfuncs = &ch_mfuncs;
} else
#endif
{
/* We can use Thread-Local storage for most mallocs. We can
* also use TL for ber parsing, but not on Add or Modify.
*/
#if 0
memsiz = ber_len( op->o_ber ) * 64;
if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
#endif
memsiz = SLAP_SLAB_SIZE;
memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
op->o_tmpmemctx = memctx;
op->o_tmpmfuncs = &slap_sl_mfuncs;
if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
/* Note - the ber and its buffer are already allocated from
* regular memory; this only affects subsequent mallocs that
* ber_scanf may invoke.
*/
ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
}
}
opidx = slap_req2op( tag );
assert( opidx != SLAP_OP_LAST );
INCR_OP_INITIATED( opidx );
rc = (*(opfun[opidx]))( op, &rs );
operations_error:
if ( rc == SLAPD_DISCONNECT ) {
tag = LBER_ERROR;
} else if ( opidx != SLAP_OP_LAST ) {
/* increment completed operations count
* only if operation was initiated
* and rc != SLAPD_DISCONNECT */
INCR_OP_COMPLETED( opidx );
}
ldap_pvt_thread_mutex_lock( &conn->c_mutex );
cancel = op->o_cancel;
if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
if ( cancel == SLAP_CANCEL_REQ ) {
op->o_cancel = rc == SLAPD_ABANDON
? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
}
do {
/* Fake a cond_wait with thread_yield, then
* verify the result properly mutex-protected.
*/
ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
do {
ldap_pvt_thread_yield();
} while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
&& cancel != SLAP_CANCEL_DONE );
ldap_pvt_thread_mutex_lock( &conn->c_mutex );
} while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
&& cancel != SLAP_CANCEL_DONE );
}
ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
LDAP_STAILQ_NEXT(op, o_next) = NULL;
conn->c_n_ops_executing--;
conn->c_n_ops_completed++;
switch( tag ) {
case LBER_ERROR:
case LDAP_REQ_UNBIND:
/* c_mutex is locked */
connection_closing( conn,
tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
break;
}
connection_resched( conn );
ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
slap_op_free( op, ctx );
return NULL;
}
static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
Connection *connection_client_setup(
ber_socket_t s,
ldap_pvt_thread_start_t *func,
void *arg )
{
Connection *c;
ber_socket_t sfd = SLAP_SOCKNEW( s );
c = connection_init( sfd, (Listener *)&dummy_list, "", "",
CONN_IS_CLIENT, 0, NULL
LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
if ( c ) {
c->c_clientfunc = func;
c->c_clientarg = arg;
slapd_add_internal( sfd, 0 );
}
return c;
}
void connection_client_enable(
Connection *c )
{
slapd_set_read( c->c_sd, 1 );
}
void connection_client_stop(
Connection *c )
{
Sockbuf *sb;
ber_socket_t s = c->c_sd;
/* get (locked) connection */
c = connection_get( s );
assert( c->c_conn_state == SLAP_C_CLIENT );
c->c_listener = NULL;
c->c_conn_state = SLAP_C_INVALID;
c->c_struct_state = SLAP_C_UNUSED;
c->c_sd = AC_SOCKET_INVALID;
c->c_close_reason = "?"; /* should never be needed */
sb = c->c_sb;
c->c_sb = ber_sockbuf_alloc( );
{
ber_len_t max = sockbuf_max_incoming;
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
}
slapd_remove( s, sb, 0, 1, 0 );
connection_return( c );
}
static int connection_read( ber_socket_t s, conn_readinfo *cri );
static void* connection_read_thread( void* ctx, void* argv )
{
int rc ;
conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
ber_socket_t s = (long)argv;
/*
* read incoming LDAP requests. If there is more than one,
* the first one is returned with new_op
*/
cri.ctx = ctx;
if( ( rc = connection_read( s, &cri ) ) < 0 ) {
Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
return (void*)(long)rc;
}
/* execute a single queued request in the same thread */
if( cri.op && !cri.nullop ) {
rc = (long)connection_operation( ctx, cri.op );
} else if ( cri.func ) {
rc = (long)cri.func( ctx, cri.arg );
}
return (void*)(long)rc;
}
int connection_read_activate( ber_socket_t s )
{
int rc;
/*
* suspend reading on this file descriptor until a connection processing
* thread reads data on it. Otherwise the listener thread will repeatedly
* submit the same event on it to the pool.
*/
rc = slapd_clr_read( s, 0 );
if ( rc )
return rc;
rc = ldap_pvt_thread_pool_submit( &connection_pool,
connection_read_thread, (void *)(long)s );
if( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"connection_read_activate(%d): submit failed (%d)\n",
s, rc, 0 );
}
return rc;
}
static int
connection_read( ber_socket_t s, conn_readinfo *cri )
{
int rc = 0;
Connection *c;
assert( connections != NULL );
/* get (locked) connection */
c = connection_get( s );
if( c == NULL ) {
Debug( LDAP_DEBUG_ANY,
"connection_read(%ld): no connection!\n",
(long) s, 0, 0 );
return -1;
}
c->c_n_read++;
if( c->c_conn_state == SLAP_C_CLOSING ) {
Debug( LDAP_DEBUG_CONNS,
"connection_read(%d): closing, ignoring input for id=%lu\n",
s, c->c_connid, 0 );
connection_return( c );
return 0;
}
if ( c->c_conn_state == SLAP_C_CLIENT ) {
cri->func = c->c_clientfunc;
cri->arg = c->c_clientarg;
/* read should already be cleared */
connection_return( c );
return 0;
}
Debug( LDAP_DEBUG_TRACE,
"connection_read(%d): checking for input on id=%lu\n",
s, c->c_connid, 0 );
#ifdef HAVE_TLS
if ( c->c_is_tls && c->c_needs_tls_accept ) {
rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
if ( rc < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"connection_read(%d): TLS accept failure "
"error=%d id=%lu, closing\n",
s, rc, c->c_connid );
c->c_needs_tls_accept = 0;
/* c_mutex is locked */
connection_closing( c, "TLS negotiation failure" );
connection_close( c );
connection_return( c );
return 0;
} else if ( rc == 0 ) {
void *ssl;
struct berval authid = BER_BVNULL;
c->c_needs_tls_accept = 0;
/* we need to let SASL know */
ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
if( c->c_tls_ssf > c->c_ssf ) {
c->c_ssf = c->c_tls_ssf;
}
rc = dnX509peerNormalize( ssl, &authid );
if ( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
"unable to get TLS client DN, error=%d id=%lu\n",
s, rc, c->c_connid );
}
Statslog( LDAP_DEBUG_STATS,
"conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
slap_sasl_external( c, c->c_tls_ssf, &authid );
if ( authid.bv_val ) free( authid.bv_val );
}
/* if success and data is ready, fall thru to data input loop */
if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
{
slapd_set_read( s, 1 );
connection_return( c );
return 0;
}
}
#endif
#ifdef HAVE_CYRUS_SASL
if ( c->c_sasl_layers ) {
/* If previous layer is not removed yet, give up for now */
if ( !c->c_sasl_sockctx ) {
slapd_set_read( s, 1 );
connection_return( c );
return 0;
}
c->c_sasl_layers = 0;
rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
if( rc != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE,
"connection_read(%d): SASL install error "
"error=%d id=%lu, closing\n",
s, rc, c->c_connid );
/* c_mutex is locked */
connection_closing( c, "SASL layer install failure" );
connection_close( c );
connection_return( c );
return 0;
}
}
#endif
#define CONNECTION_INPUT_LOOP 1
/* #define DATA_READY_LOOP 1 */
do {
/* How do we do this without getting into a busy loop ? */
rc = connection_input( c, cri );
}
#ifdef DATA_READY_LOOP
while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
#elif defined CONNECTION_INPUT_LOOP
while(!rc);
#else
while(0);
#endif
if( rc < 0 ) {
Debug( LDAP_DEBUG_CONNS,
"connection_read(%d): input error=%d id=%lu, closing.\n",
s, rc, c->c_connid );
/* c_mutex is locked */
connection_closing( c, conn_lost_str );
connection_close( c );
connection_return( c );
return 0;
}
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
slapd_set_write( s, 0 );
}
slapd_set_read( s, 1 );
connection_return( c );
return 0;
}
static int
connection_input( Connection *conn , conn_readinfo *cri )
{
Operation *op;
ber_tag_t tag;
ber_len_t len;
ber_int_t msgid;
BerElement *ber;
int rc;
#ifdef LDAP_CONNECTIONLESS
Sockaddr peeraddr;
char *cdn = NULL;
#endif
char *defer = NULL;
void *ctx;
if ( conn->c_currentber == NULL &&
( conn->c_currentber = ber_alloc()) == NULL )
{
Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
return -1;
}
sock_errset(0);
#ifdef LDAP_CONNECTIONLESS
if ( conn->c_is_udp ) {
char peername[sizeof("IP=255.255.255.255:65336")];
len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
if (len != sizeof(struct sockaddr)) return 1;
sprintf( peername, "IP=%s:%d",
inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
(unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
Statslog( LDAP_DEBUG_STATS,
"conn=%lu UDP request from %s (%s) accepted.\n",
conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
}
#endif
tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
if ( tag != LDAP_TAG_MESSAGE ) {
int err = sock_errno();
if ( err != EWOULDBLOCK && err != EAGAIN ) {
/* log, close and send error */
Debug( LDAP_DEBUG_TRACE,
"ber_get_next on fd %d failed errno=%d (%s)\n",
conn->c_sd, err, sock_errstr(err) );
ber_free( conn->c_currentber, 1 );
conn->c_currentber = NULL;
return -2;
}
return 1;
}
ber = conn->c_currentber;
conn->c_currentber = NULL;
if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
/* log, close and send error */
Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
ber_free( ber, 1 );
return -1;
}
if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
/* log, close and send error */
Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
ber_free( ber, 1 );
return -1;
}
#ifdef LDAP_CONNECTIONLESS
if( conn->c_is_udp ) {
if( tag == LBER_OCTETSTRING ) {
ber_get_stringa( ber, &cdn );
tag = ber_peek_tag(ber, &len);
}
if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
ber_free( ber, 1 );
return 0;
}
}
#endif
if(tag == LDAP_REQ_BIND) {
/* immediately abandon all existing operations upon BIND */
connection_abandon( conn );
}
ctx = cri->ctx;
op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
op->o_conn = conn;
/* clear state if the connection is being reused from inactive */
if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
memset( &conn->c_pagedresults_state, 0,
sizeof( conn->c_pagedresults_state ) );
}
op->o_res_ber = NULL;
#ifdef LDAP_CONNECTIONLESS
if (conn->c_is_udp) {
if ( cdn ) {
ber_str2bv( cdn, 0, 1, &op->o_dn );
op->o_protocol = LDAP_VERSION2;
}
op->o_res_ber = ber_alloc_t( LBER_USE_DER );
if (op->o_res_ber == NULL) return 1;
rc = ber_write( op->o_res_ber, (char *)&peeraddr,
sizeof(struct sockaddr), 0 );
if (rc != sizeof(struct sockaddr)) {
Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
return 1;
}
if (op->o_protocol == LDAP_VERSION2) {
rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
if (rc == -1) {
Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
return rc;
}
}
}
#endif /* LDAP_CONNECTIONLESS */
rc = 0;
/* Don't process requests when the conn is in the middle of a
* Bind, or if it's closing. Also, don't let any single conn
* use up all the available threads, and don't execute if we're
* currently blocked on output. And don't execute if there are
* already pending ops, let them go first. Abandon operations
* get exceptions to some, but not all, cases.
*/
switch( tag ){
default:
/* Abandon and Unbind are exempt from these checks */
if (conn->c_conn_state == SLAP_C_CLOSING) {
defer = "closing";
break;
} else if (conn->c_writewaiter) {
defer = "awaiting write";
break;
} else if (conn->c_n_ops_pending) {
defer = "pending operations";
break;
}
/* FALLTHRU */
case LDAP_REQ_ABANDON:
/* Unbind is exempt from these checks */
if (conn->c_n_ops_executing >= connection_pool_max/2) {
defer = "too many executing";
break;
} else if (conn->c_conn_state == SLAP_C_BINDING) {
defer = "binding";
break;
}
/* FALLTHRU */
case LDAP_REQ_UNBIND:
break;
}
if( defer ) {
int max = conn->c_dn.bv_len
? slap_conn_max_pending_auth
: slap_conn_max_pending;
Debug( LDAP_DEBUG_ANY,
"connection_input: conn=%lu deferring operation: %s\n",
conn->c_connid, defer, 0 );
conn->c_n_ops_pending++;
LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
} else {
conn->c_n_ops_executing++;
/*
* The first op will be processed in the same thread context,
* as long as there is only one op total.
* Subsequent ops will be submitted to the pool by
* calling connection_op_activate()
*/
if ( cri->op == NULL ) {
/* the first incoming request */
connection_op_queue( op );
cri->op = op;
} else {
if ( !cri->nullop ) {
cri->nullop = 1;
rc = ldap_pvt_thread_pool_submit( &connection_pool,
connection_operation, (void *) cri->op );
}
connection_op_activate( op );
}
}
#ifdef NO_THREADS
if ( conn->c_struct_state != SLAP_C_USED ) {
/* connection must have got closed underneath us */
return 1;
}
#endif
assert( conn->c_struct_state == SLAP_C_USED );
return rc;
}
static int
connection_resched( Connection *conn )
{
Operation *op;
if( conn->c_writewaiter )
return 0;
if( conn->c_conn_state == SLAP_C_CLOSING ) {
Debug( LDAP_DEBUG_CONNS, "connection_resched: "
"attempting closing conn=%lu sd=%d\n",
conn->c_connid, conn->c_sd, 0 );
connection_close( conn );
return 0;
}
if( conn->c_conn_state != SLAP_C_ACTIVE ) {
/* other states need different handling */
return 0;
}
while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
LDAP_STAILQ_NEXT(op, o_next) = NULL;
/* pending operations should not be marked for abandonment */
assert(!op->o_abandon);
conn->c_n_ops_pending--;
conn->c_n_ops_executing++;
connection_op_activate( op );
if ( conn->c_conn_state == SLAP_C_BINDING ) break;
}
return 0;
}
static void
connection_init_log_prefix( Operation *op )
{
if ( op->o_connid == (unsigned long)(-1) ) {
snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
"conn=-1 op=%lu", op->o_opid );
} else {
snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
"conn=%lu op=%lu", op->o_connid, op->o_opid );
}
}
static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
{
op->o_conn->c_sasl_bindop = NULL;
ch_free( op->o_callback );
op->o_callback = NULL;
return SLAP_CB_CONTINUE;
}
static int connection_bind_cb( Operation *op, SlapReply *rs )
{
ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
if ( op->o_conn->c_conn_state == SLAP_C_BINDING )
op->o_conn->c_conn_state = SLAP_C_ACTIVE;
op->o_conn->c_sasl_bind_in_progress =
( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
/* Moved here from bind.c due to ITS#4158 */
op->o_conn->c_sasl_bindop = NULL;
if ( op->orb_method == LDAP_AUTH_SASL ) {
if( rs->sr_err == LDAP_SUCCESS ) {
ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
if( !BER_BVISEMPTY( &op->orb_edn ) ) {
/* edn is always normalized already */
ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
}
op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
BER_BVZERO( &op->orb_edn );
op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
op->o_conn->c_sasl_ssf = op->orb_ssf;
if( op->orb_ssf > op->o_conn->c_ssf ) {
op->o_conn->c_ssf = op->orb_ssf;
}
if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
ber_len_t max = sockbuf_max_incoming_auth;
ber_sockbuf_ctrl( op->o_conn->c_sb,
LBER_SB_OPT_SET_MAX_INCOMING, &max );
}
/* log authorization identity */
Statslog( LDAP_DEBUG_STATS,
"%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
op->o_log_prefix,
BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
op->o_conn->c_authmech.bv_val,
op->orb_ssf, op->o_conn->c_ssf );
Debug( LDAP_DEBUG_TRACE,
"do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
op->o_conn->c_authmech.bv_val,
BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
op->orb_ssf );
} else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
free( op->o_conn->c_sasl_bind_mech.bv_val );
BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
}
}
}
ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
ch_free( op->o_callback );
op->o_callback = NULL;
return SLAP_CB_CONTINUE;
}
static void connection_op_queue( Operation *op )
{
ber_tag_t tag = op->o_tag;
if (tag == LDAP_REQ_BIND) {
slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
sc->sc_response = connection_bind_cb;
sc->sc_cleanup = connection_bind_cleanup_cb;
sc->sc_next = op->o_callback;
op->o_callback = sc;
op->o_conn->c_conn_state = SLAP_C_BINDING;
}
if (!op->o_dn.bv_len) {
op->o_authz = op->o_conn->c_authz;
if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
} else {
ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
}
}
op->o_authtype = op->o_conn->c_authtype;
ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
if (!op->o_protocol) {
op->o_protocol = op->o_conn->c_protocol
? op->o_conn->c_protocol : LDAP_VERSION3;
}
if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
op->o_protocol > LDAP_VERSION2)
{
op->o_conn->c_conn_state = SLAP_C_ACTIVE;
}
op->o_connid = op->o_conn->c_connid;
connection_init_log_prefix( op );
LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
}
static int connection_op_activate( Operation *op )
{
int rc;
connection_op_queue( op );
rc = ldap_pvt_thread_pool_submit( &connection_pool,
connection_operation, (void *) op );
if ( rc != 0 ) {
Debug( LDAP_DEBUG_ANY,
"connection_op_activate: submit failed (%d) for conn=%lu\n",
rc, op->o_connid, 0 );
/* should move op to pending list */
}
return rc;
}
int connection_write(ber_socket_t s)
{
Connection *c;
Operation *op;
assert( connections != NULL );
slapd_clr_write( s, 0 );
c = connection_get( s );
if( c == NULL ) {
Debug( LDAP_DEBUG_ANY,
"connection_write(%ld): no connection!\n",
(long)s, 0, 0 );
return -1;
}
c->c_n_write++;
Debug( LDAP_DEBUG_TRACE,
"connection_write(%d): waking output for id=%lu\n",
s, c->c_connid, 0 );
ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
ldap_pvt_thread_cond_signal( &c->c_write2_cv );
ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
slapd_set_read( s, 1 );
}
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
slapd_set_write( s, 1 );
}
/* If there are ops pending because of a writewaiter,
* start one up.
*/
while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
if ( !c->c_writewaiter ) break;
if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
LDAP_STAILQ_NEXT(op, o_next) = NULL;
/* pending operations should not be marked for abandonment */
assert(!op->o_abandon);
c->c_n_ops_pending--;
c->c_n_ops_executing++;
connection_op_activate( op );
break;
}
connection_return( c );
return 0;
}
#ifdef LDAP_SLAPI
typedef struct conn_fake_extblock {
void *eb_conn;
void *eb_op;
} conn_fake_extblock;
static void
connection_fake_destroy(
void *key,
void *data )
{
Connection conn = {0};
Operation op = {0};
Opheader ohdr = {0};
conn_fake_extblock *eb = data;
op.o_hdr = &ohdr;
op.o_hdr->oh_extensions = eb->eb_op;
conn.c_extensions = eb->eb_conn;
op.o_conn = &conn;
conn.c_connid = -1;
op.o_connid = -1;
ber_memfree_x( eb, NULL );
slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
}
#endif
void
connection_fake_init(
Connection *conn,
OperationBuffer *opbuf,
void *ctx )
{
connection_fake_init2( conn, opbuf, ctx, 1 );
}
void
operation_fake_init(
Connection *conn,
Operation *op,
void *ctx,
int newmem )
{
/* set memory context */
op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
newmem );
op->o_tmpmfuncs = &slap_sl_mfuncs;
op->o_threadctx = ctx;
op->o_tid = ldap_pvt_thread_pool_tid( ctx );
op->o_counters = &slap_counters;
op->o_conn = conn;
op->o_connid = op->o_conn->c_connid;
connection_init_log_prefix( op );
}
void
connection_fake_init2(
Connection *conn,
OperationBuffer *opbuf,
void *ctx,
int newmem )
{
Operation *op = (Operation *) opbuf;
conn->c_connid = -1;
conn->c_conn_idx = -1;
conn->c_send_ldap_result = slap_send_ldap_result;
conn->c_send_search_entry = slap_send_search_entry;
conn->c_send_search_reference = slap_send_search_reference;
conn->c_send_ldap_extended = slap_send_ldap_extended;
conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
conn->c_listener = (Listener *)&dummy_list;
conn->c_peer_domain = slap_empty_bv;
conn->c_peer_name = slap_empty_bv;
memset( opbuf, 0, sizeof( *opbuf ));
op->o_hdr = &opbuf->ob_hdr;
op->o_controls = opbuf->ob_controls;
operation_fake_init( conn, op, ctx, newmem );
#ifdef LDAP_SLAPI
if ( slapi_plugins_used ) {
conn_fake_extblock *eb;
void *ebx = NULL;
/* Use thread keys to make sure these eventually get cleaned up */
if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
&ebx, NULL )) {
eb = ch_malloc( sizeof( *eb ));
slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
eb->eb_conn = conn->c_extensions;
eb->eb_op = op->o_hdr->oh_extensions;
ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
eb, connection_fake_destroy, NULL, NULL );
} else {
eb = ebx;
conn->c_extensions = eb->eb_conn;
op->o_hdr->oh_extensions = eb->eb_op;
}
}
#endif /* LDAP_SLAPI */
slap_op_time( &op->o_time, &op->o_tincr );
}
void
connection_assign_nextid( Connection *conn )
{
ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
conn->c_connid = conn_nextid++;
ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
}
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