/* $OpenLDAP$ */ /* * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved. * COPYING RESTRICTIONS APPLY, see COPYRIGHT file */ #include "portable.h" #include #include #include #include #include #include #include #include #include "ldap_pvt.h" #include "lutil.h" #include "slap.h" /* protected by connections_mutex */ static ldap_pvt_thread_mutex_t connections_mutex; static Connection *connections = NULL; static unsigned long conn_nextid = 0; /* structure state (protected by connections_mutex) */ #define SLAP_C_UNINITIALIZED 0x00 /* MUST BE ZERO (0) */ #define SLAP_C_UNUSED 0x01 #define SLAP_C_USED 0x02 /* connection state (protected by c_mutex ) */ #define SLAP_C_INVALID 0x00 /* MUST BE ZERO (0) */ #define SLAP_C_INACTIVE 0x01 /* zero threads */ #define SLAP_C_ACTIVE 0x02 /* one or more threads */ #define SLAP_C_BINDING 0x03 /* binding */ #define SLAP_C_CLOSING 0x04 /* closing */ const char * connection_state2str( int state ) { switch( state ) { case SLAP_C_INVALID: return "!"; case SLAP_C_INACTIVE: return "|"; case SLAP_C_ACTIVE: return ""; case SLAP_C_BINDING: return "B"; case SLAP_C_CLOSING: return "C"; } return "?"; } static Connection* connection_get( ber_socket_t s ); static int connection_input( Connection *c ); static void connection_close( Connection *c ); static int connection_op_activate( Connection *conn, Operation *op ); static int connection_resched( Connection *conn ); static void connection_abandon( Connection *conn ); static void connection_destroy( Connection *c ); struct co_arg { Connection *co_conn; Operation *co_op; }; /* * Initialize connection management infrastructure. */ int connections_init(void) { assert( connections == NULL ); if( connections != NULL) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connections_init: already initialized.\n" )); #else Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n", 0, 0, 0 ); #endif return -1; } /* should check return of every call */ ldap_pvt_thread_mutex_init( &connections_mutex ); connections = (Connection *) calloc( dtblsize, sizeof(Connection) ); if( connections == NULL ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connections_init: allocation (%d * %ld) of connection array failed\n", dtblsize, (long) sizeof(Connection) )); #else Debug( LDAP_DEBUG_ANY, "connections_init: allocation (%d*%ld) of connection array failed\n", dtblsize, (long) sizeof(Connection), 0 ); #endif return -1; } assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED ); assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED ); /* * per entry initialization of the Connection array initialization * will be done by connection_init() */ return 0; } /* * Destroy connection management infrastructure. */ int connections_destroy(void) { ber_socket_t i; /* should check return of every call */ if( connections == NULL) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connections_destroy: nothing to destroy.\n")); #else Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n", 0, 0, 0 ); #endif 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_write_mutex ); ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv ); } } free( connections ); connections = NULL; ldap_pvt_thread_mutex_destroy( &connections_mutex ); return 0; } /* * shutdown all connections */ int connections_shutdown(void) { ber_socket_t i; ldap_pvt_thread_mutex_lock( &connections_mutex ); for ( i = 0; i < dtblsize; i++ ) { if( connections[i].c_struct_state != SLAP_C_USED ) { continue; } ldap_pvt_thread_mutex_lock( &connections[i].c_mutex ); /* connections_mutex and c_mutex are locked */ connection_closing( &connections[i] ); connection_close( &connections[i] ); ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex ); } ldap_pvt_thread_mutex_unlock( &connections_mutex ); return 0; } /* * Timeout idle connections. */ int connections_timeout_idle(time_t now) { int i = 0; int connindex; Connection* c; for( c = connection_first( &connindex ); c != NULL; c = connection_next( c, &connindex ) ) { if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) { /* close it */ connection_closing( c ); connection_close( c ); i++; } } connection_done( c ); return i; } static Connection* connection_get( ber_socket_t s ) { /* connections_mutex should be locked by caller */ Connection *c; #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY, "connection_get: socket %ld\n", (long)s )); #else Debug( LDAP_DEBUG_ARGS, "connection_get(%ld)\n", (long) s, 0, 0 ); #endif assert( connections != NULL ); if(s == AC_SOCKET_INVALID) { return NULL; } #ifndef HAVE_WINSOCK c = &connections[s]; assert( c->c_struct_state != SLAP_C_UNINITIALIZED ); #else c = NULL; { ber_socket_t i, sd; for(i=0; i unused by resched, * so don't assert details here. */ if( sd == s ) { c = &connections[i]; break; } } } #endif if( c != NULL ) { ber_socket_t sd; ldap_pvt_thread_mutex_lock( &c->c_mutex ); ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd ); if( c->c_struct_state != SLAP_C_USED ) { /* connection must have been closed due to resched */ assert( c->c_conn_state == SLAP_C_INVALID ); assert( sd == AC_SOCKET_INVALID ); #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ARGS, "connection_get: connection %d not used\n", s )); #else Debug( LDAP_DEBUG_TRACE, "connection_get(%d): connection not used\n", s, 0, 0 ); #endif ldap_pvt_thread_mutex_unlock( &c->c_mutex ); return NULL; } #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS, "connection_get: get for %d got connid %ld\n",s, c->c_connid )); #else Debug( LDAP_DEBUG_TRACE, "connection_get(%d): got connid=%ld\n", s, c->c_connid, 0 ); #endif c->c_n_get++; assert( c->c_struct_state == SLAP_C_USED ); assert( c->c_conn_state != SLAP_C_INVALID ); assert( sd != AC_SOCKET_INVALID ); #ifdef SLAPD_MONITOR c->c_activitytime = slap_get_time(); #else if( global_idletimeout > 0 ) { c->c_activitytime = slap_get_time(); } #endif } return c; } static void connection_return( Connection *c ) { ldap_pvt_thread_mutex_unlock( &c->c_mutex ); } long connection_init( ber_socket_t s, const char* url, const char* dnsname, const char* peername, const char* sockname, int tls_udp_option, slap_ssf_t ssf, const char *authid ) { unsigned long id; Connection *c; assert( connections != NULL ); assert( dnsname != NULL ); assert( peername != NULL ); assert( sockname != NULL ); #ifndef HAVE_TLS assert( tls_udp_option != 1 ); #endif if( s == AC_SOCKET_INVALID ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_init: init of socket %ld invalid.\n", (long)s )); #else Debug( LDAP_DEBUG_ANY, "connection_init(%ld): invalid.\n", (long) s, 0, 0 ); #endif return -1; } assert( s >= 0 ); #ifndef HAVE_WINSOCK assert( s < dtblsize ); #endif ldap_pvt_thread_mutex_lock( &connections_mutex ); #ifndef HAVE_WINSOCK c = &connections[s]; #else { ber_socket_t i; c = NULL; for( i=0; i < dtblsize; i++) { ber_socket_t sd; if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) { assert( connections[i].c_sb == 0 ); c = &connections[i]; break; } sd = AC_SOCKET_INVALID; if (connections[i].c_sb != NULL) ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd ); if( connections[i].c_struct_state == SLAP_C_UNUSED ) { assert( sd == AC_SOCKET_INVALID ); c = &connections[i]; break; } assert( connections[i].c_struct_state == SLAP_C_USED ); assert( connections[i].c_conn_state != SLAP_C_INVALID ); assert( sd != AC_SOCKET_INVALID ); } if( c == NULL ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_init: skt %d connection table full (%d/%d)\n", s, i, dtblsize )); #else Debug( LDAP_DEBUG_ANY, "connection_init(%d): connection table full (%d/%d)\n", s, i, dtblsize); #endif ldap_pvt_thread_mutex_unlock( &connections_mutex ); return -1; } } #endif assert( c != NULL ); if( c->c_struct_state == SLAP_C_UNINITIALIZED ) { c->c_authmech = NULL; c->c_dn.bv_val = NULL; c->c_dn.bv_len = 0; c->c_ndn.bv_val = NULL; c->c_ndn.bv_len = 0; c->c_cdn.bv_val = NULL; c->c_cdn.bv_len = 0; c->c_groups = NULL; c->c_listener_url = NULL; c->c_peer_domain = NULL; c->c_peer_name = NULL; c->c_sock_name = NULL; LDAP_STAILQ_INIT(&c->c_ops); LDAP_STAILQ_INIT(&c->c_pending_ops); c->c_sasl_bind_mech = NULL; c->c_sasl_context = NULL; c->c_sasl_extra = 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_write_mutex ); ldap_pvt_thread_cond_init( &c->c_write_cv ); c->c_struct_state = SLAP_C_UNUSED; } ldap_pvt_thread_mutex_lock( &c->c_mutex ); assert( c->c_struct_state == SLAP_C_UNUSED ); assert( c->c_authmech == NULL ); assert( c->c_dn.bv_val == NULL ); assert( c->c_ndn.bv_val == NULL ); assert( c->c_cdn.bv_val == NULL ); assert( c->c_groups == NULL ); assert( c->c_listener_url == NULL ); assert( c->c_peer_domain == NULL ); assert( c->c_peer_name == NULL ); assert( c->c_sock_name == NULL ); assert( LDAP_STAILQ_EMPTY(&c->c_ops) ); assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) ); assert( c->c_sasl_bind_mech == NULL ); assert( c->c_sasl_context == NULL ); assert( c->c_sasl_extra == NULL ); assert( c->c_currentber == NULL ); c->c_listener_url = ch_strdup( url ); c->c_peer_domain = ch_strdup( dnsname ); c->c_peer_name = ch_strdup( peername ); c->c_sock_name = ch_strdup( sockname ); 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; #ifdef SLAPD_MONITOR c->c_activitytime = c->c_starttime = slap_get_time(); #else if( global_idletimeout > 0 ) { c->c_activitytime = c->c_starttime = slap_get_time(); } #endif #ifdef LDAP_CONNECTIONLESS c->c_is_udp = 0; if (tls_udp_option == 2) { 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 *)&s ); } else #endif { #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 *)&s ); } ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead, LBER_SBIOD_LEVEL_PROVIDER, NULL ); #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 ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_init: conn %d set nonblocking failed\n", c->c_connid )); #else Debug( LDAP_DEBUG_ANY, "connection_init(%d, %s): set nonblocking failed\n", s, c->c_peer_name, 0 ); #endif } id = c->c_connid = conn_nextid++; c->c_conn_state = SLAP_C_INACTIVE; c->c_struct_state = SLAP_C_USED; c->c_ssf = c->c_transport_ssf = ssf; c->c_tls_ssf = 0; #ifdef HAVE_TLS if ( tls_udp_option == 1 ) { 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 ); slap_sasl_external( c, ssf, authid ); ldap_pvt_thread_mutex_unlock( &c->c_mutex ); ldap_pvt_thread_mutex_unlock( &connections_mutex ); backend_connection_init(c); return id; } 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(c->c_authmech != NULL ) { free(c->c_authmech); c->c_authmech = NULL; } if(c->c_dn.bv_val != NULL) { free(c->c_dn.bv_val); c->c_dn.bv_val = NULL; } c->c_dn.bv_len = 0; if(c->c_ndn.bv_val != NULL) { free(c->c_ndn.bv_val); c->c_ndn.bv_val = NULL; } c->c_ndn.bv_len = 0; if(c->c_cdn.bv_val != NULL) { free(c->c_cdn.bv_val); c->c_cdn.bv_val = NULL; } c->c_cdn.bv_len = 0; c->c_authc_backend = NULL; c->c_authz_backend = NULL; { GroupAssertion *g, *n; for (g = c->c_groups; g; g=n) { n = g->next; free(g); } c->c_groups = NULL; } } static void connection_destroy( Connection *c ) { /* note: connections_mutex should be locked by caller */ 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) ); backend_connection_destroy(c); c->c_protocol = 0; c->c_connid = -1; c->c_activitytime = c->c_starttime = 0; connection2anonymous( c ); if(c->c_listener_url != NULL) { free(c->c_listener_url); c->c_listener_url = NULL; } if(c->c_peer_domain != NULL) { free(c->c_peer_domain); c->c_peer_domain = NULL; } if(c->c_peer_name != NULL) { #ifdef LDAP_PF_lOCAL /* * If peer was a domain socket, unlink. Mind you, * they may be un-named. Should we leave this to * the client? */ if (strncmp(c->c_peer_name, "PATH=", 5) == 0) { char *path = c->c_peer_name + 5; if (path != '\0') { (void)unlink(path); } } #endif /* LDAP_PF_LOCAL */ free(c->c_peer_name); c->c_peer_name = NULL; } if(c->c_sock_name != NULL) { free(c->c_sock_name); c->c_sock_name = NULL; } c->c_sasl_bind_in_progress = 0; if(c->c_sasl_bind_mech != NULL) { free(c->c_sasl_bind_mech); c->c_sasl_bind_mech = NULL; } slap_sasl_close( c ); if ( c->c_currentber != NULL ) { ber_free( c->c_currentber, 1 ); c->c_currentber = NULL; } ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd ); if ( sd != AC_SOCKET_INVALID ) { slapd_remove( sd, 0 ); Statslog( LDAP_DEBUG_STATS, "conn=%ld fd=%d closed\n", c->c_connid, sd, 0, 0, 0 ); } ber_sockbuf_free( 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->c_conn_state = SLAP_C_INVALID; c->c_struct_state = SLAP_C_UNUSED; } int connection_state_closing( Connection *c ) { /* c_mutex must be locked by caller */ int state; assert( c != NULL ); assert( c->c_struct_state == SLAP_C_USED ); state = c->c_conn_state; assert( state != SLAP_C_INVALID ); return state == SLAP_C_CLOSING; } static void connection_abandon( Connection *c ) { /* c_mutex must be locked by caller */ Operation *o; LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) { ldap_pvt_thread_mutex_lock( &o->o_abandonmutex ); o->o_abandon = 1; ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex ); } /* remove pending operations */ 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 ); } } void connection_closing( Connection *c ) { assert( connections != NULL ); assert( c != NULL ); assert( c->c_struct_state == SLAP_C_USED ); assert( c->c_conn_state != SLAP_C_INVALID ); /* c_mutex must be locked by caller */ if( c->c_conn_state != SLAP_C_CLOSING ) { ber_socket_t sd; ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd ); #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1, "connection_closing: conn %d readying socket %d for close.\n", c->c_connid, sd )); #else Debug( LDAP_DEBUG_TRACE, "connection_closing: readying conn=%ld sd=%d for close\n", c->c_connid, sd, 0 ); #endif /* update state to closing */ c->c_conn_state = SLAP_C_CLOSING; /* don't listen on this port anymore */ slapd_clr_read( sd, 1 ); /* abandon active operations */ connection_abandon( c ); /* wake write blocked operations */ slapd_clr_write( sd, 1 ); ldap_pvt_thread_cond_signal( &c->c_write_cv ); } } static void connection_close( Connection *c ) { ber_socket_t sd; assert( connections != NULL ); assert( c != NULL ); assert( c->c_struct_state == SLAP_C_USED ); assert( c->c_conn_state == SLAP_C_CLOSING ); /* note: connections_mutex and c_mutex should be locked by caller */ ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd ); if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1, "connection_close: conn %d deferring sd %d\n", c->c_connid, sd )); #else Debug( LDAP_DEBUG_TRACE, "connection_close: deferring conn=%ld sd=%d\n", c->c_connid, sd, 0 ); #endif return; } #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS, "connection_close: conn %d sd %d\n", c->c_connid, sd )); #else Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n", c->c_connid, sd, 0 ); #endif connection_destroy( c ); } unsigned long connections_nextid(void) { unsigned long id; assert( connections != NULL ); ldap_pvt_thread_mutex_lock( &connections_mutex ); id = conn_nextid; ldap_pvt_thread_mutex_unlock( &connections_mutex ); return id; } Connection* connection_first( ber_socket_t *index ) { assert( connections != NULL ); assert( index != NULL ); ldap_pvt_thread_mutex_lock( &connections_mutex ); *index = 0; return connection_next(NULL, index); } Connection* connection_next( Connection *c, ber_socket_t *index ) { assert( connections != NULL ); assert( index != NULL ); assert( *index <= dtblsize ); if( c != NULL ) { ldap_pvt_thread_mutex_unlock( &c->c_mutex ); } c = NULL; for(; *index < dtblsize; (*index)++) { if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) { assert( connections[*index].c_conn_state == SLAP_C_INVALID ); #ifndef HAVE_WINSOCK continue; #else break; #endif } if( connections[*index].c_struct_state == SLAP_C_USED ) { assert( connections[*index].c_conn_state != SLAP_C_INVALID ); c = &connections[(*index)++]; break; } assert( connections[*index].c_struct_state == SLAP_C_UNUSED ); assert( connections[*index].c_conn_state == SLAP_C_INVALID ); } if( c != NULL ) { ldap_pvt_thread_mutex_lock( &c->c_mutex ); } return c; } void connection_done( Connection *c ) { assert( connections != NULL ); if( c != NULL ) { ldap_pvt_thread_mutex_unlock( &c->c_mutex ); } ldap_pvt_thread_mutex_unlock( &connections_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. */ static void * connection_operation( void *arg_v ) { int rc; struct co_arg *arg = arg_v; ber_tag_t tag = arg->co_op->o_tag; Connection *conn = arg->co_conn; ldap_pvt_thread_mutex_lock( &num_ops_mutex ); num_ops_initiated++; ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_operation: conn %d SASL bind in progress (tag=%ld).\n", conn->c_connid, (long)tag )); #else Debug( LDAP_DEBUG_ANY, "connection_operation: " "error: SASL bind in progress (tag=%ld).\n", (long) tag, 0, 0 ); #endif send_ldap_result( conn, arg->co_op, rc = LDAP_OPERATIONS_ERROR, NULL, "SASL bind in progress", NULL, NULL ); goto operations_error; } switch ( tag ) { case LDAP_REQ_BIND: rc = do_bind( conn, arg->co_op ); break; case LDAP_REQ_UNBIND: rc = do_unbind( conn, arg->co_op ); break; case LDAP_REQ_ADD: rc = do_add( conn, arg->co_op ); break; case LDAP_REQ_DELETE: rc = do_delete( conn, arg->co_op ); break; case LDAP_REQ_MODRDN: rc = do_modrdn( conn, arg->co_op ); break; case LDAP_REQ_MODIFY: rc = do_modify( conn, arg->co_op ); break; case LDAP_REQ_COMPARE: rc = do_compare( conn, arg->co_op ); break; case LDAP_REQ_SEARCH: rc = do_search( conn, arg->co_op ); break; case LDAP_REQ_ABANDON: rc = do_abandon( conn, arg->co_op ); break; case LDAP_REQ_EXTENDED: rc = do_extended( conn, arg->co_op ); break; default: #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_operation: conn %d unknown LDAP request 0x%lx\n", conn->c_connid, tag )); #else Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n", tag, 0, 0 ); #endif arg->co_op->o_tag = LBER_ERROR; send_ldap_disconnect( conn, arg->co_op, LDAP_PROTOCOL_ERROR, "unknown LDAP request" ); rc = -1; break; } if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR; operations_error: ldap_pvt_thread_mutex_lock( &num_ops_mutex ); num_ops_completed++; ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); ldap_pvt_thread_mutex_lock( &conn->c_mutex ); conn->c_n_ops_executing--; conn->c_n_ops_completed++; LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next); LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL; slap_op_free( arg->co_op ); arg->co_op = NULL; arg->co_conn = NULL; free( (char *) arg ); arg = NULL; switch( tag ) { case LBER_ERROR: case LDAP_REQ_UNBIND: /* c_mutex is locked */ connection_closing( conn ); break; case LDAP_REQ_BIND: conn->c_sasl_bind_in_progress = rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0; if( conn->c_conn_state == SLAP_C_BINDING) { conn->c_conn_state = SLAP_C_ACTIVE; } } connection_resched( conn ); ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); return NULL; } int connection_read(ber_socket_t s) { int rc = 0; Connection *c; assert( connections != NULL ); ldap_pvt_thread_mutex_lock( &connections_mutex ); /* get (locked) connection */ c = connection_get( s ); if( c == NULL ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_read: sock %ld no connection\n", (long)s )); #else Debug( LDAP_DEBUG_ANY, "connection_read(%ld): no connection!\n", (long) s, 0, 0 ); #endif slapd_remove(s, 0); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return -1; } c->c_n_read++; if( c->c_conn_state == SLAP_C_CLOSING ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_read: conn %d connection closing, ignoring input\n", c->c_connid)); #else Debug( LDAP_DEBUG_TRACE, "connection_read(%d): closing, ignoring input for id=%ld\n", s, c->c_connid, 0 ); #endif connection_return( c ); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return 0; } #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1, "connection_read: conn %d checking for input.\n", c->c_connid )); #else Debug( LDAP_DEBUG_TRACE, "connection_read(%d): checking for input on id=%ld\n", s, c->c_connid, 0 ); #endif #ifdef HAVE_TLS if ( c->c_is_tls && c->c_needs_tls_accept ) { rc = ldap_pvt_tls_accept( c->c_sb, NULL ); if ( rc < 0 ) { #if 0 /* required by next #if 0 */ struct timeval tv; fd_set rfd; #endif #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_read: conn %d TLS accept error, error %d\n", c->c_connid, rc )); #else Debug( LDAP_DEBUG_TRACE, "connection_read(%d): TLS accept error " "error=%d id=%ld, closing\n", s, rc, c->c_connid ); #endif c->c_needs_tls_accept = 0; /* connections_mutex and c_mutex are locked */ connection_closing( c ); #if 0 /* Drain input before close, to allow SSL error codes * to propagate to client. */ FD_ZERO(&rfd); FD_SET(s, &rfd); for (rc=1; rc>0;) { tv.tv_sec = 1; tv.tv_usec = 0; rc = select(s+1, &rfd, NULL, NULL, &tv); if (rc == 1) ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL); } #endif connection_close( c ); } else if ( rc == 0 ) { void *ssl; char *authid; c->c_needs_tls_accept = 0; /* we need to let SASL know */ ssl = (void *)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; } authid = (char *)ldap_pvt_tls_get_peer( ssl ); slap_sasl_external( c, c->c_tls_ssf, authid ); } connection_return( c ); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return 0; } #endif #ifdef HAVE_CYRUS_SASL if ( c->c_sasl_layers ) { c->c_sasl_layers = 0; rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_context ); if( rc != LDAP_SUCCESS ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_read: conn %d SASL install error %d, closing\n", c->c_connid, rc )); #else Debug( LDAP_DEBUG_TRACE, "connection_read(%d): SASL install error " "error=%d id=%ld, closing\n", s, rc, c->c_connid ); #endif /* connections_mutex and c_mutex are locked */ connection_closing( c ); connection_close( c ); connection_return( c ); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return 0; } } #endif #define CONNECTION_INPUT_LOOP 1 #ifdef DATA_READY_LOOP while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) ) #elif CONNECTION_INPUT_LOOP while(!rc) #endif { /* How do we do this without getting into a busy loop ? */ rc = connection_input( c ); } if( rc < 0 ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_read: conn %d input error %d, closing.\n", c->c_connid, rc )); #else Debug( LDAP_DEBUG_TRACE, "connection_read(%d): input error=%d id=%ld, closing.\n", s, rc, c->c_connid ); #endif /* connections_mutex and c_mutex are locked */ connection_closing( c ); connection_close( c ); connection_return( c ); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return 0; } 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 ); } connection_return( c ); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return 0; } static int connection_input( Connection *conn ) { Operation *op; ber_tag_t tag; ber_len_t len; ber_int_t msgid; BerElement *ber; #ifdef LDAP_CONNECTIONLESS Sockaddr peeraddr; char *cdn = NULL; #endif if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc()) == NULL ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_input: conn %d ber_alloc failed.\n", conn->c_connid )); #else Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 ); #endif return -1; } errno = 0; #ifdef LDAP_CONNECTIONLESS if (conn->c_is_udp) { char peername[sizeof("IP=255.255.255.255:65336")]; len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr)); if (len != sizeof(struct sockaddr)) return 1; sprintf( peername, "IP=%s:%d", inet_ntoa( peeraddr.sa_in_addr.sin_addr ), (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) ); Statslog( LDAP_DEBUG_STATS, "conn=%ld UDP request from %s (%s) accepted.\n", conn->c_connid, peername, conn->c_sock_name, 0, 0 ); } #endif tag = ber_get_next( conn->c_sb, &len, conn->c_currentber ); if ( tag != LDAP_TAG_MESSAGE ) { int err = errno; ber_socket_t sd; ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd ); #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_input: conn %d ber_get_next failed, errno %d (%s).\n", conn->c_connid, err, sock_errstr(err) )); #else Debug( LDAP_DEBUG_TRACE, "ber_get_next on fd %d failed errno=%d (%s)\n", sd, err, sock_errstr(err) ); #endif if ( err != EWOULDBLOCK && err != EAGAIN ) { /* log, close and send error */ 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 */ #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_input: conn %d ber_get_int returns 0x%lx.\n", conn->c_connid, tag )); #else Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 ); #endif ber_free( ber, 1 ); return -1; } if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) { /* log, close and send error */ #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_input: conn %d ber_peek_tag returns 0x%lx.\n", conn->c_connid, tag )); #else Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 ); #endif ber_free( ber, 1 ); return -1; } #ifdef LDAP_CONNECTIONLESS if (conn->c_is_udp) { if (tag == LBER_OCTETSTRING) { ber_get_stringa( ber, &cdn ); tag = ber_peek_tag(ber, &len); } if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_input: conn %d invalid req for UDP 0x%lx.\n", conn->c_connid, tag )); #else Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 ); #endif ber_free( ber, 1 ); return 0; } } #endif if(tag == LDAP_REQ_BIND) { /* immediately abandon all exiting operations upon BIND */ connection_abandon( conn ); } op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ ); #ifdef LDAP_CONNECTIONLESS op->o_peeraddr = peeraddr; if (cdn) { op->o_dn = cdn; op->o_protocol = LDAP_VERSION2; } #endif if ( conn->c_conn_state == SLAP_C_BINDING || conn->c_conn_state == SLAP_C_CLOSING ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_input: conn %d deferring operation\n", conn->c_connid )); #else Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 ); #endif conn->c_n_ops_pending++; LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next ); } else { conn->c_n_ops_executing++; connection_op_activate( conn, 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 0; } static int connection_resched( Connection *conn ) { Operation *op; if( conn->c_conn_state == SLAP_C_CLOSING ) { int rc; ber_socket_t sd; ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd ); /* us trylock to avoid possible deadlock */ rc = ldap_pvt_thread_mutex_trylock( &connections_mutex ); if( rc ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1, "connection_resched: conn %d reaquiring locks.\n", conn->c_connid )); #else Debug( LDAP_DEBUG_TRACE, "connection_resched: reaquiring locks conn=%ld sd=%d\n", conn->c_connid, sd, 0 ); #endif /* * reaquire locks in the right order... * this may allow another thread to close this connection, * so recheck state below. */ ldap_pvt_thread_mutex_unlock( &conn->c_mutex ); ldap_pvt_thread_mutex_lock( &connections_mutex ); ldap_pvt_thread_mutex_lock( &conn->c_mutex ); } if( conn->c_conn_state != SLAP_C_CLOSING ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_INFO, "connection_resched: conn %d closed by other thread.\n", conn->c_connid )); #else Debug( LDAP_DEBUG_TRACE, "connection_resched: " "closed by other thread conn=%ld sd=%d\n", conn->c_connid, sd, 0 ); #endif } else { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1, "connection_resched: conn %d attempting closing.\n", conn->c_connid )); #else Debug( LDAP_DEBUG_TRACE, "connection_resched: " "attempting closing conn=%ld sd=%d\n", conn->c_connid, sd, 0 ); #endif connection_close( conn ); } ldap_pvt_thread_mutex_unlock( &connections_mutex ); 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) { 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( conn, op ); if ( conn->c_conn_state == SLAP_C_BINDING ) { break; } } return 0; } static int connection_op_activate( Connection *conn, Operation *op ) { struct co_arg *arg; int status; ber_tag_t tag = op->o_tag; if(tag == LDAP_REQ_BIND) { conn->c_conn_state = SLAP_C_BINDING; } arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) ); arg->co_conn = conn; arg->co_op = op; if (!arg->co_op->o_dn.bv_len) { arg->co_op->o_authz = conn->c_authz; arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ? conn->c_dn.bv_val : "" ); arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ? conn->c_ndn.bv_val : "" ); } arg->co_op->o_authtype = conn->c_authtype; arg->co_op->o_authmech = conn->c_authmech != NULL ? ch_strdup( conn->c_authmech ) : NULL; if (!arg->co_op->o_protocol) { arg->co_op->o_protocol = conn->c_protocol ? conn->c_protocol : LDAP_VERSION3; } arg->co_op->o_connid = conn->c_connid; LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next ); status = ldap_pvt_thread_pool_submit( &connection_pool, connection_operation, (void *) arg ); if ( status != 0 ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_op_activate: conn %d thread pool submit failed.\n", conn->c_connid )); #else Debug( LDAP_DEBUG_ANY, "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 ); #endif /* should move op to pending list */ } return status; } int connection_write(ber_socket_t s) { Connection *c; assert( connections != NULL ); ldap_pvt_thread_mutex_lock( &connections_mutex ); c = connection_get( s ); slapd_clr_write( s, 0); if( c == NULL ) { #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_ERR, "connection_write: sock %ld no connection!\n",(long)s)); #else Debug( LDAP_DEBUG_ANY, "connection_write(%ld): no connection!\n", (long) s, 0, 0 ); #endif slapd_remove(s, 0); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return -1; } c->c_n_write++; #ifdef NEW_LOGGING LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1, "connection_write conn %d waking output.\n", c->c_connid )); #else Debug( LDAP_DEBUG_TRACE, "connection_write(%d): waking output for id=%ld\n", s, c->c_connid, 0 ); #endif ldap_pvt_thread_cond_signal( &c->c_write_cv ); 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 ); connection_return( c ); ldap_pvt_thread_mutex_unlock( &connections_mutex ); return 0; } /* * Create client side and server side connection structures, connected to * one another, for the front end to use for searches on arbitrary back ends. */ int connection_internal_open( Connection **conn, LDAP **ldp, const char *id ) { int rc; ber_socket_t fd[2] = {-1,-1}; Operation *op; *conn=NULL; *ldp=NULL; rc = lutil_pair( fd ); if( rc == -1 ) { return LDAP_OTHER; } rc = connection_init( fd[1], "INT", "localhost", "localhost:0", "localhost:00", 0, 256, id ); if( rc < 0 ) { tcp_close( fd[0] ); tcp_close( fd[1] ); return LDAP_OTHER; } slapd_add_internal( fd[1] ); /* A search operation, number 0 */ op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0); op->o_ndn.bv_val = ch_strdup( id ); op->o_ndn.bv_len = strlen( id ); op->o_protocol = LDAP_VERSION3; (*conn) = connection_get( fd[1] ); LDAP_STAILQ_INSERT_HEAD( &(*conn)->c_ops, op, o_next); (*conn)->c_conn_state = SLAP_C_ACTIVE; /* Create the client side of the connection */ rc = ldap_open_internal_connection( ldp, &(fd[0]) ); if( rc != LDAP_SUCCESS ) { tcp_close( fd[0] ); return LDAP_OTHER; } /* The connection_get() will have locked the connection's mutex */ ldap_pvt_thread_mutex_unlock( &((*conn)->c_mutex) ); return LDAP_SUCCESS; } void connection_internal_close( Connection *conn ) { Operation *op = LDAP_STAILQ_FIRST(&conn->c_ops); LDAP_STAILQ_REMOVE_HEAD(&conn->c_ops, o_next); LDAP_STAILQ_NEXT(op, o_next) = NULL; slap_op_free( op ); connection_closing( conn ); connection_close( conn ); }