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openldap  2.4.31
Classes | Defines | Typedefs | Functions | Variables
connection.c File Reference
#include "portable.h"
#include <stdio.h>
#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"

Go to the source code of this file.

Classes

struct  conn_readinfo

Defines

#define INCR_OP_INITIATED(index)   do { } while (0)
#define INCR_OP_COMPLETED(index)
#define CONNECTION_INPUT_LOOP   1

Typedefs

typedef struct conn_readinfo conn_readinfo

Functions

const char * connection_state2str (int state)
static Connectionconnection_get (ber_socket_t s)
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)
int connections_init (void)
int connections_destroy (void)
int connections_shutdown (void)
int connections_timeout_idle (time_t now)
void connections_drop ()
static void connection_return (Connection *c)
Connectionconnection_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))
void connection2anonymous (Connection *c)
int connection_valid (Connection *c)
static void connection_wake_writers (Connection *c)
void connection_closing (Connection *c, const char *why)
unsigned long connections_nextid (void)
Connectionconnection_first (ber_socket_t *index)
Connectionconnection_next (Connection *c, ber_socket_t *index)
void connection_done (Connection *c)
static void conn_counter_destroy (void *key, void *data)
static void conn_counter_init (Operation *op, void *ctx)
static voidconnection_operation (void *ctx, void *arg_v)
Connectionconnection_client_setup (ber_socket_t s, ldap_pvt_thread_start_t *func, void *arg)
void connection_client_enable (Connection *c)
void connection_client_stop (Connection *c)
static int connection_read (ber_socket_t s, conn_readinfo *cri)
static voidconnection_read_thread (void *ctx, void *argv)
int connection_read_activate (ber_socket_t s)
static void connection_init_log_prefix (Operation *op)
static int connection_bind_cleanup_cb (Operation *op, SlapReply *rs)
static int connection_bind_cb (Operation *op, SlapReply *rs)
int connection_write (ber_socket_t s)
void connection_fake_init (Connection *conn, OperationBuffer *opbuf, void *ctx)
void operation_fake_init (Connection *conn, Operation *op, void *ctx, int newmem)
void connection_fake_init2 (Connection *conn, OperationBuffer *opbuf, void *ctx, int newmem)
void connection_assign_nextid (Connection *conn)

Variables

static ldap_pvt_thread_mutex_t connections_mutex
static Connectionconnections = NULL
static ldap_pvt_thread_mutex_t conn_nextid_mutex
static unsigned long conn_nextid = SLAPD_SYNC_SYNCCONN_OFFSET
static const char conn_lost_str [] = "connection lost"
static ldap_pvt_thread_start_t connection_operation
static BI_op_func * opfun []
static const Listener dummy_list = { BER_BVC(""), BER_BVC("") }

Class Documentation

struct conn_readinfo

Definition at line 76 of file connection.c.

Collaboration diagram for conn_readinfo:
Class Members
void * arg
void * ctx
ldap_pvt_thread_start_t * func
int nullop
Operation * op

Define Documentation

#define CONNECTION_INPUT_LOOP   1
#define INCR_OP_COMPLETED (   index)
Value:
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)

Definition at line 974 of file connection.c.

#define INCR_OP_INITIATED (   index)    do { } while (0)

Definition at line 973 of file connection.c.


Typedef Documentation

typedef struct conn_readinfo conn_readinfo

Function Documentation

static void conn_counter_destroy ( void key,
void data 
) [static]

Definition at line 1002 of file connection.c.

{
       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 );
}

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static void conn_counter_init ( Operation op,
void ctx 
) [static]

Definition at line 1035 of file connection.c.

{
       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;
}

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Definition at line 580 of file 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;
}

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static void connection_abandon ( Connection conn) [static]

Definition at line 723 of file connection.c.

{
       /* c_mutex must be locked by caller */

       Operation *o, *next, op = {0};
       Opheader ohdr = {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 ) {
              SlapReply rs = {REP_RESULT};

              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 );
       }
}

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Definition at line 2080 of file connection.c.

{
       ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
       conn->c_connid = conn_nextid++;
       ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
}
static int connection_bind_cb ( Operation op,
SlapReply rs 
) [static]

Definition at line 1778 of file connection.c.

{
       ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
       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;
}

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static int connection_bind_cleanup_cb ( Operation op,
SlapReply rs 
) [static]

Definition at line 1768 of file connection.c.

{
       op->o_conn->c_sasl_bindop = NULL;

       ch_free( op->o_callback );
       op->o_callback = NULL;

       return SLAP_CB_CONTINUE;
}

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Definition at line 1233 of file connection.c.

{
       slapd_set_read( c->c_sd, 1 );
}

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Connection* connection_client_setup ( ber_socket_t  s,
ldap_pvt_thread_start_t *  func,
void arg 
)

Definition at line 1213 of file connection.c.

{
       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;
}

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Definition at line 1239 of file 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 );
}

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static void connection_close ( Connection c) [static]

Definition at line 827 of file connection.c.

{
       assert( connections != NULL );
       assert( c != NULL );

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

       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 );
}

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void connection_closing ( Connection c,
const char *  why 
)

Definition at line 792 of file connection.c.

{
       assert( connections != NULL );
       assert( c != NULL );

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

       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 */
              connection_wake_writers( c );

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

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static void connection_destroy ( Connection c) [static]

Definition at line 614 of file 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 );
              }
       }
}

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Definition at line 944 of file connection.c.

{
       assert( connections != NULL );

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

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void connection_fake_init ( Connection conn,
OperationBuffer opbuf,
void ctx 
)

Definition at line 1998 of file connection.c.

{
       connection_fake_init2( conn, opbuf, ctx, 1 );
}

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void connection_fake_init2 ( Connection conn,
OperationBuffer opbuf,
void ctx,
int  newmem 
)

Definition at line 2028 of file connection.c.

{
       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 );
}

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Connection* connection_first ( ber_socket_t *  index)

Definition at line 878 of file connection.c.

{
       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);
}

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static Connection * connection_get ( ber_socket_t  s) [static]

Definition at line 280 of file connection.c.

{
       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 */

                     Debug( LDAP_DEBUG_CONNS,
                            "connection_get(%d): connection not used\n",
                            s, 0, 0 );
                     assert( c->c_conn_state == SLAP_C_INVALID );
                     assert( c->c_sd == AC_SOCKET_INVALID );

                     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;
}

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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_ARGstruct berval *peerbv 
)

Definition at line 339 of file connection.c.

{
       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 );

       backend_connection_init(c);
       ldap_pvt_thread_mutex_unlock( &c->c_mutex );

       return c;
}

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static void connection_init_log_prefix ( Operation op) [static]

Definition at line 1756 of file connection.c.

{
       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 );
       }
}

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static int connection_input ( Connection c,
conn_readinfo cri 
) [static]

Definition at line 1488 of file connection.c.

{
       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")];
              const char *peeraddr_string = NULL;

              len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
              if (len != sizeof(struct sockaddr)) return 1;

#if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
              char addr[INET_ADDRSTRLEN];
              peeraddr_string = inet_ntop( AF_INET, &peeraddr.sa_in_addr.sin_addr,
                        addr, sizeof(addr) );
#else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
              peeraddr_string = inet_ntoa( peeraddr.sa_in_addr.sin_addr );
#endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
              sprintf( peername, "IP=%s:%d",
                      peeraddr_string,
                     (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 ) {
                     if ( (tag = ber_get_stringa( ber, &cdn )) != LBER_ERROR )
                            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 );

       Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
              (long) op->o_time, 0);

       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;
}

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Connection* connection_next ( Connection c,
ber_socket_t *  index 
)

Definition at line 895 of file connection.c.

{
       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;
}

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static int connection_op_activate ( Operation op) [static]

Definition at line 1882 of file connection.c.

{
       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;
}

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static void connection_op_queue ( Operation op) [static]

Definition at line 1838 of file connection.c.

{
       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 );
}

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static void* connection_operation ( void ctx,
void arg_v 
) [static]

Definition at line 1057 of file connection.c.

{
       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 );

       if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
              conn->c_conn_state = SLAP_C_ACTIVE;

       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;
}

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static int connection_read ( ber_socket_t  s,
conn_readinfo cri 
) [static]

Definition at line 1325 of file connection.c.

{
       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 );
              } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
                     LBER_SB_OPT_NEEDS_WRITE, NULL )) { /* need to retry */
                     slapd_set_write( s, 1 );
                     connection_return( c );
                     return 0;
              }

              /* 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;
}

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int connection_read_activate ( ber_socket_t  s)

Definition at line 1294 of file connection.c.

{
       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;

       /* Don't let blocked writers block a pause request */
       if ( connections[s].c_writewaiter &&
              ldap_pvt_thread_pool_pausing( &connection_pool ))
              connection_wake_writers( &connections[s] );

       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;
}

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static void* connection_read_thread ( void ctx,
void argv 
) [static]

Definition at line 1268 of file connection.c.

{
       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;
}

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static int connection_resched ( Connection conn) [static]

Definition at line 1716 of file connection.c.

{
       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;
}

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static void connection_return ( Connection c) [static]

Definition at line 334 of file connection.c.

{
       ldap_pvt_thread_mutex_unlock( &c->c_mutex );
}

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const char* connection_state2str ( int  state)

Definition at line 60 of file connection.c.

{
       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 "?";
}

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Definition at line 712 of file 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;
}

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static void connection_wake_writers ( Connection c) [static]

Definition at line 767 of file 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 ) {
                     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 );
       }
}

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int connection_write ( ber_socket_t  s)

Definition at line 1901 of file connection.c.

{
       Connection *c;
       Operation *op;

       assert( connections != NULL );

       c = connection_get( s );
       if( c == NULL ) {
              Debug( LDAP_DEBUG_ANY,
                     "connection_write(%ld): no connection!\n",
                     (long)s, 0, 0 );
              return -1;
       }

       slapd_clr_write( s, 0 );

#ifdef HAVE_TLS
       if ( c->c_is_tls && c->c_needs_tls_accept ) {
              connection_return( c );
              connection_read_activate( s );
              return 0;
       }
#endif

       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;
}

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Definition at line 140 of file connection.c.

{
       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;
}

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Definition at line 258 of file connection.c.

{
       Connection* c;
       ber_socket_t connindex;

       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 );
       }
       connection_done( c );
}

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Definition at line 98 of file connection.c.

{
       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;
}

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Definition at line 853 of file connection.c.

{
       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;
}

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Definition at line 180 of file connection.c.

{
       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;
}

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int connections_timeout_idle ( time_t  now)

Definition at line 209 of file connection.c.

{
       int i = 0, writers = 0;
       ber_socket_t 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( global_idletimeout && 
                     difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
                     /* close it */
                     connection_closing( c, "idletimeout" );
                     connection_close( c );
                     i++;
                     continue;
              }
              if ( c->c_writewaiter && global_writetimeout ) {
                     writers = 1;
                     if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
                            /* close it */
                            connection_closing( c, "writetimeout" );
                            connection_close( c );
                            i++;
                            continue;
                     }
              }
       }
       connection_done( c );
       if ( old && !writers )
              slapd_clr_writetime( old );

       return i;
}

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void operation_fake_init ( Connection conn,
Operation op,
void ctx,
int  newmem 
)

Definition at line 2007 of file connection.c.

{
       /* 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 );
}

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Variable Documentation

const char conn_lost_str[] = "connection lost" [static]

Definition at line 57 of file connection.c.

Definition at line 55 of file connection.c.

Definition at line 54 of file connection.c.

ldap_pvt_thread_start_t connection_operation [static]

Definition at line 93 of file connection.c.

Connection* connections = NULL [static]

Definition at line 52 of file connection.c.

Definition at line 51 of file connection.c.

const Listener dummy_list = { BER_BVC(""), BER_BVC("") } [static]

Definition at line 1211 of file connection.c.

BI_op_func* opfun[] [static]
Initial value:

Definition at line 985 of file connection.c.