/* $NetBSD: connection.c,v 1.1.1.6.6.1 2019/08/10 06:17:17 martin Exp $ */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1998-2019 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 * . */ /* 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 __RCSID("$NetBSD: connection.c,v 1.1.1.6.6.1 2019/08/10 06:17:17 martin Exp $"); #include "portable.h" #include #ifdef HAVE_LIMITS_H #include #endif #include #include #include #include #include #include "lutil.h" #include "slap.h" #ifdef LDAP_CONNECTIONLESS #include "../../libraries/liblber/lber-int.h" /* ber_int_sb_read() */ #endif #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 = SLAPD_SYNC_SYNCCONN_OFFSET; static const char conn_lost_str[] = "connection lost"; 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; ic_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; } /* Drop all client connections */ void connections_drop() { 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 ); } 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 */ 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; } 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 = c->c_sasl_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 ); if ( !(flags & CONN_IS_UDP )) Statslog( LDAP_DEBUG_STATS, "conn=%ld fd=%ld ACCEPT from %s (%s)\n", id, (long) s, peername, listener->sl_name.bv_val, 0 ); 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}; 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 ); /* don't abandon an op twice */ if ( o->o_abandon ) continue; 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 ); } } static void connection_wake_writers( Connection *c ) { /* wake write blocked operations */ ldap_pvt_thread_mutex_lock( &c->c_write1_mutex ); if ( c->c_writers > 0 ) { c->c_writers = -c->c_writers; ldap_pvt_thread_cond_broadcast( &c->c_write1_cv ); ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex ); if ( c->c_writewaiter ) { 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 ); } } void connection_closing( Connection *c, const char *why ) { 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; } } static void connection_close( 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 ); } 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; } /* * Loop through the connections: * * for (c = connection_first(&i); c; c = connection_next(c, &i)) ...; * connection_done(c); * * 'i' is the cursor, initialized by connection_first(). * 'c_mutex' is locked in the returned connection. The functions must * be passed the previous return value so they can unlock it again. */ 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); } /* Next connection in loop, see connection_first() */ 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; } /* End connection loop, see connection_first() */ 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 ); 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; } 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; /* 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; } 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 ); } 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; } 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 ) { #if defined(LDAP_PF_INET6) char peername[sizeof("IP=[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")]; char addr[INET6_ADDRSTRLEN]; #else char peername[sizeof("IP=255.255.255.255:65336")]; char addr[INET_ADDRSTRLEN]; #endif const char *peeraddr_string = NULL; len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(Sockaddr)); if (len != sizeof(Sockaddr)) return 1; #if defined(LDAP_PF_INET6) if (peeraddr.sa_addr.sa_family == AF_INET6) { if ( IN6_IS_ADDR_V4MAPPED(&peeraddr.sa_in6_addr.sin6_addr) ) { #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP ) peeraddr_string = inet_ntop( AF_INET, ((struct in_addr *)&peeraddr.sa_in6_addr.sin6_addr.s6_addr[12]), addr, sizeof(addr) ); #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */ peeraddr_string = inet_ntoa( *((struct in_addr *) &peeraddr.sa_in6_addr.sin6_addr.s6_addr[12]) ); #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */ if ( !peeraddr_string ) peeraddr_string = SLAP_STRING_UNKNOWN; sprintf( peername, "IP=%s:%d", peeraddr_string, (unsigned) ntohs( peeraddr.sa_in6_addr.sin6_port ) ); } else { peeraddr_string = inet_ntop( AF_INET6, &peeraddr.sa_in6_addr.sin6_addr, addr, sizeof addr ); if ( !peeraddr_string ) peeraddr_string = SLAP_STRING_UNKNOWN; sprintf( peername, "IP=[%s]:%d", peeraddr_string, (unsigned) ntohs( peeraddr.sa_in6_addr.sin6_port ) ); } } else #endif #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP ) { 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; } 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 ); 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 ) ? "" : 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 ) ? "" : 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 ); 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; } #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 ); }