/* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1998-2006 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 "portable.h" #include #include #include #include #include #include #include #include "slap.h" #include "ldap_pvt_thread.h" #include "lutil.h" #include "ldap_rq.h" #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL) # include #endif #ifdef HAVE_TCPD # include int allow_severity = LOG_INFO; int deny_severity = LOG_NOTICE; # define SLAP_STRING_UNKNOWN STRING_UNKNOWN #else /* ! TCP Wrappers */ # define SLAP_STRING_UNKNOWN "unknown" #endif /* ! TCP Wrappers */ #ifdef LDAP_PF_LOCAL # include /* this should go in as soon as it is accepted */ # define LDAPI_MOD_URLEXT "x-mod" #endif /* LDAP_PF_LOCAL */ #ifdef LDAP_PF_INET6 int slap_inet4or6 = AF_UNSPEC; #else int slap_inet4or6 = AF_INET; #endif /* globals */ time_t starttime; ber_socket_t dtblsize; slap_ssf_t local_ssf = LDAP_PVT_SASL_LOCAL_SSF; struct runqueue_s slapd_rq; Listener **slap_listeners = NULL; #ifndef SLAPD_LISTEN_BACKLOG #define SLAPD_LISTEN_BACKLOG 1024 #endif static ber_socket_t wake_sds[2]; static int emfile; static volatile int waking; #ifdef NO_THREADS #define WAKE_LISTENER(w) do { \ if ((w) && ++waking < 5) { \ tcp_write( wake_sds[1], "0", 1 ); \ } \ } while(0) #else #define WAKE_LISTENER(w) do { \ if (w) { \ tcp_write( wake_sds[1], "0", 1 ); \ } \ } while(0) #endif volatile sig_atomic_t slapd_shutdown = 0; volatile sig_atomic_t slapd_gentle_shutdown = 0; volatile sig_atomic_t slapd_abrupt_shutdown = 0; static struct slap_daemon { ldap_pvt_thread_mutex_t sd_mutex; #ifdef HAVE_TCPD ldap_pvt_thread_mutex_t tcpd_mutex; #endif ber_socket_t sd_nactives; int sd_nwriters; #ifdef HAVE_EPOLL struct epoll_event *sd_epolls; int sd_nepolls; int *sd_index; int sd_epfd; int sd_nfds; #else #ifndef HAVE_WINSOCK /* In winsock, accept() returns values higher than dtblsize so don't bother with this optimization */ int sd_nfds; #endif fd_set sd_actives; fd_set sd_readers; fd_set sd_writers; #endif } slap_daemon; #ifdef HAVE_EPOLL # define SLAP_EVENTS_ARE_INDEXED 0 # define SLAP_SOCK_IX(s) (slap_daemon.sd_index[(s)]) # define SLAP_SOCK_EP(s) (slap_daemon.sd_epolls[SLAP_SOCK_IX(s)]) # define SLAP_SOCK_EV(s) (SLAP_SOCK_EP(s).events) # define SLAP_SOCK_IS_ACTIVE(s) (SLAP_SOCK_IX(s) != -1) # define SLAP_SOCK_NOT_ACTIVE(s) (SLAP_SOCK_IX(s) == -1) # define SLAP_SOCK_IS_SET(s, mode) (SLAP_SOCK_EV(s) & (mode)) # define SLAP_SOCK_IS_READ(s) SLAP_SOCK_IS_SET((s), EPOLLIN) # define SLAP_SOCK_IS_WRITE(s) SLAP_SOCK_IS_SET((s), EPOLLOUT) # define SLAP_SET_SOCK(s, mode) do { \ if ((SLAP_SOCK_EV(s) & (mode)) != (mode)) { \ SLAP_SOCK_EV(s) |= (mode); \ epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, (s), \ &SLAP_SOCK_EP(s)); \ } \ } while(0) # define SLAP_CLR_SOCK(s, mode) do { \ if ((SLAP_SOCK_EV(s) & (mode))) { \ SLAP_SOCK_EV(s) &= ~(mode); \ epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_MOD, s, \ &SLAP_SOCK_EP(s)); \ } \ } while(0) # define SLAP_SOCK_SET_READ(s) SLAP_SET_SOCK(s, EPOLLIN) # define SLAP_SOCK_SET_WRITE(s) SLAP_SET_SOCK(s, EPOLLOUT) # ifdef SLAP_LIGHTWEIGHT_DISPATCHER # define SLAP_SOCK_SET_SUSPEND(s) \ ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 1 ) # define SLAP_SOCK_CLR_SUSPEND(s) \ ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] = 0 ) # define SLAP_SOCK_IS_SUSPEND(s) \ ( slap_daemon.sd_suspend[SLAP_SOCK_IX(s)] == 1 ) # endif # define SLAP_SOCK_CLR_READ(s) SLAP_CLR_SOCK((s), EPOLLIN) # define SLAP_SOCK_CLR_WRITE(s) SLAP_CLR_SOCK((s), EPOLLOUT) # define SLAP_CLR_EVENT(i, mode) (revents[(i)].events &= ~(mode)) # define SLAP_EVENT_MAX slap_daemon.sd_nfds /* If a Listener address is provided, store that as the epoll data. * Otherwise, store the address of this socket's slot in the * index array. If we can't do this add, the system is out of * resources and we need to shutdown. */ # define SLAP_ADD_SOCK(s, l) do { \ int rc; \ SLAP_SOCK_IX((s)) = slap_daemon.sd_nfds; \ SLAP_SOCK_EP((s)).data.ptr = (l) ? (l) : (void *)(&SLAP_SOCK_IX(s)); \ SLAP_SOCK_EV((s)) = EPOLLIN; \ rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_ADD, \ (s), &SLAP_SOCK_EP((s))); \ if ( rc == 0 ) { \ slap_daemon.sd_nfds++; \ } else { \ Debug( LDAP_DEBUG_ANY, \ "daemon: epoll_ctl(ADD,fd=%d) failed, errno=%d, shutting down\n", \ s, errno, 0 ); \ slapd_shutdown = 2; \ } \ } while (0) # define SLAP_EV_LISTENER(ptr) (((int *)(ptr) >= slap_daemon.sd_index && \ (int *)(ptr) <= (slap_daemon.sd_index+dtblsize)) ? 0 : 1 ) # define SLAP_EV_PTRFD(ptr) (SLAP_EV_LISTENER(ptr) ? \ ((Listener *)ptr)->sl_sd : (int *)(ptr) - slap_daemon.sd_index) # define SLAP_DEL_SOCK(s) do { \ int fd, rc, index = SLAP_SOCK_IX((s)); \ if ( index < 0 ) break; \ rc = epoll_ctl(slap_daemon.sd_epfd, EPOLL_CTL_DEL, \ (s), &SLAP_SOCK_EP((s))); \ slap_daemon.sd_epolls[index] = \ slap_daemon.sd_epolls[slap_daemon.sd_nfds-1]; \ fd = SLAP_EV_PTRFD(slap_daemon.sd_epolls[index].data.ptr); \ slap_daemon.sd_index[fd] = index; \ slap_daemon.sd_index[(s)] = -1; \ slap_daemon.sd_nfds--; \ } while (0) # define SLAP_EVENT_CLR_READ(i) SLAP_CLR_EVENT((i), EPOLLIN) # define SLAP_EVENT_CLR_WRITE(i) SLAP_CLR_EVENT((i), EPOLLOUT) # define SLAP_CHK_EVENT(i, mode) (revents[(i)].events & mode) # define SLAP_EVENT_IS_READ(i) SLAP_CHK_EVENT((i), EPOLLIN) # define SLAP_EVENT_IS_WRITE(i) SLAP_CHK_EVENT((i), EPOLLOUT) # define SLAP_EVENT_IS_LISTENER(i) SLAP_EV_LISTENER(revents[(i)].data.ptr) # define SLAP_EVENT_LISTENER(i) ((Listener *)(revents[(i)].data.ptr)) # define SLAP_EVENT_FD(i) SLAP_EV_PTRFD(revents[(i)].data.ptr) # define SLAP_SOCK_SET_INIT do { \ slap_daemon.sd_epolls = ch_calloc(1, \ sizeof(struct epoll_event) * dtblsize * 2); \ slap_daemon.sd_index = ch_malloc(sizeof(int) * dtblsize); \ slap_daemon.sd_epfd = epoll_create( dtblsize ); \ for (i=0; itv_sec * 1000 : -1 ) #else /* select */ # define SLAP_EVENTS_ARE_INDEXED 1 # define SLAP_EVENT_DECL \ fd_set readfds, writefds # define SLAP_EVENT_INIT do { \ AC_MEMCPY( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) ); \ if ( nwriters ) { \ AC_MEMCPY( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) ); \ } else { \ FD_ZERO( &writefds ); \ } \ } while (0) # ifdef FD_SETSIZE # define CHK_SETSIZE do { \ if (dtblsize > FD_SETSIZE) dtblsize = FD_SETSIZE; \ } while (0) # else # define CHK_SETSIZE do { ; } while (0) # endif # define SLAP_SOCK_SET_INIT do { \ CHK_SETSIZE; \ FD_ZERO(&slap_daemon.sd_readers); \ FD_ZERO(&slap_daemon.sd_writers); \ } while (0) # define SLAP_SOCK_IS_ACTIVE(fd) FD_ISSET((fd), &slap_daemon.sd_actives) # define SLAP_SOCK_IS_READ(fd) FD_ISSET((fd), &slap_daemon.sd_readers) # define SLAP_SOCK_IS_WRITE(fd) FD_ISSET((fd), &slap_daemon.sd_writers) # define SLAP_SOCK_NOT_ACTIVE(fd) (!SLAP_SOCK_IS_ACTIVE(fd) && \ !SLAP_SOCK_IS_READ(fd) && !SLAP_SOCK_IS_WRITE(fd)) # ifdef HAVE_WINSOCK # define SLAP_SOCK_SET_READ(fd) do { \ if (!SLAP_SOCK_IS_READ(fd)) { FD_SET((fd), &slap_daemon.sd_readers); } \ } while(0) # define SLAP_SOCK_SET_WRITE(fd) do { \ if (!SLAP_SOCK_IS_WRITE(fd)) { FD_SET((fd), &slap_daemon.sd_writers); } \ } while(0) # define SLAP_ADDTEST(s) # define SLAP_EVENT_MAX dtblsize # else # define SLAP_SOCK_SET_READ(fd) FD_SET((fd), &slap_daemon.sd_readers) # define SLAP_SOCK_SET_WRITE(fd) FD_SET((fd), &slap_daemon.sd_writers) # define SLAP_EVENT_MAX slap_daemon.sd_nfds # define SLAP_ADDTEST(s) do { \ if ((s) >= slap_daemon.sd_nfds) slap_daemon.sd_nfds = (s)+1; \ } while (0) # endif # define SLAP_SOCK_CLR_READ(fd) FD_CLR((fd), &slap_daemon.sd_readers) # define SLAP_SOCK_CLR_WRITE(fd) FD_CLR((fd), &slap_daemon.sd_writers) # define SLAP_ADD_SOCK(s, l) do { \ SLAP_ADDTEST((s)); \ FD_SET((s), &slap_daemon.sd_actives); \ FD_SET((s), &slap_daemon.sd_readers); \ } while(0) # define SLAP_DEL_SOCK(s) do { \ FD_CLR((s), &slap_daemon.sd_actives); \ FD_CLR((s), &slap_daemon.sd_readers); \ FD_CLR((s), &slap_daemon.sd_writers); \ } while(0) # define SLAP_EVENT_IS_READ(fd) FD_ISSET((fd), &readfds) # define SLAP_EVENT_IS_WRITE(fd) FD_ISSET((fd), &writefds) # define SLAP_EVENT_CLR_READ(fd) FD_CLR((fd), &readfds) # define SLAP_EVENT_CLR_WRITE(fd) FD_CLR((fd), &writefds) # define SLAP_EVENT_WAIT(tvp) \ select( SLAP_EVENT_MAX, &readfds, \ nwriters > 0 ? &writefds : NULL, NULL, (tvp) ) #endif #ifdef HAVE_SLP /* * SLP related functions */ #include #define LDAP_SRVTYPE_PREFIX "service:ldap://" #define LDAPS_SRVTYPE_PREFIX "service:ldaps://" static char** slapd_srvurls = NULL; static SLPHandle slapd_hslp = 0; int slapd_register_slp = 0; char *slapd_slp_attrs = NULL; static SLPError slapd_slp_cookie; void slapd_slp_init( const char* urls ) { int i; SLPError err; slapd_srvurls = ldap_str2charray( urls, " " ); if( slapd_srvurls == NULL ) return; /* find and expand INADDR_ANY URLs */ for( i=0; slapd_srvurls[i] != NULL; i++ ) { if( strcmp( slapd_srvurls[i], "ldap:///" ) == 0) { char *host = ldap_pvt_get_fqdn( NULL ); if ( host != NULL ) { slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i], strlen( host ) + sizeof( LDAP_SRVTYPE_PREFIX ) ); strcpy( lutil_strcopy(slapd_srvurls[i], LDAP_SRVTYPE_PREFIX ), host ); ch_free( host ); } } else if ( strcmp( slapd_srvurls[i], "ldaps:///" ) == 0) { char *host = ldap_pvt_get_fqdn( NULL ); if ( host != NULL ) { slapd_srvurls[i] = (char *) ch_realloc( slapd_srvurls[i], strlen( host ) + sizeof( LDAPS_SRVTYPE_PREFIX ) ); strcpy( lutil_strcopy(slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX ), host ); ch_free( host ); } } } /* open the SLP handle */ err = SLPOpen( "en", 0, &slapd_hslp ); if (err != SLP_OK) { Debug( LDAP_DEBUG_CONNS, "daemon: SLPOpen() failed with %ld\n", (long)err, 0, 0 ); } } void slapd_slp_deinit() { if( slapd_srvurls == NULL ) return; ldap_charray_free( slapd_srvurls ); slapd_srvurls = NULL; /* close the SLP handle */ SLPClose( slapd_hslp ); } void slapd_slp_regreport( SLPHandle hslp, SLPError errcode, void* cookie ) { /* return the error code in the cookie */ *(SLPError*)cookie = errcode; } void slapd_slp_reg() { int i; SLPError err; if( slapd_srvurls == NULL ) return; for( i=0; slapd_srvurls[i] != NULL; i++ ) { if( strncmp( slapd_srvurls[i], LDAP_SRVTYPE_PREFIX, sizeof( LDAP_SRVTYPE_PREFIX ) - 1 ) == 0 || strncmp( slapd_srvurls[i], LDAPS_SRVTYPE_PREFIX, sizeof( LDAPS_SRVTYPE_PREFIX ) - 1 ) == 0 ) { err = SLPReg( slapd_hslp, slapd_srvurls[i], SLP_LIFETIME_MAXIMUM, "ldap", (slapd_slp_attrs) ? slapd_slp_attrs : "", SLP_TRUE, slapd_slp_regreport, &slapd_slp_cookie ); if (err != SLP_OK || slapd_slp_cookie != SLP_OK) { Debug( LDAP_DEBUG_CONNS, "daemon: SLPReg(%s) failed with %ld, cookie = %ld\n", slapd_srvurls[i], (long)err, (long)slapd_slp_cookie ); } } } } void slapd_slp_dereg() { int i; SLPError err; if( slapd_srvurls == NULL ) return; for( i=0; slapd_srvurls[i] != NULL; i++ ) { err = SLPDereg( slapd_hslp, slapd_srvurls[i], slapd_slp_regreport, &slapd_slp_cookie ); if (err != SLP_OK || slapd_slp_cookie != SLP_OK) { Debug( LDAP_DEBUG_CONNS, "daemon: SLPDereg(%s) failed with %ld, cookie = %ld\n", slapd_srvurls[i], (long)err, (long)slapd_slp_cookie ); } } } #endif /* HAVE_SLP */ /* * Add a descriptor to daemon control * * If isactive, the descriptor is a live server session and is subject * to idletimeout control. Otherwise, the descriptor is a passive * listener or an outbound client session, and not subject to * idletimeout. The underlying event handler may record the Listener * argument to differentiate Listener's from real sessions. */ static void slapd_add(ber_socket_t s, int isactive, Listener *sl) { ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); assert( SLAP_SOCK_NOT_ACTIVE(s) ); if ( isactive ) slap_daemon.sd_nactives++; SLAP_ADD_SOCK(s, sl); Debug( LDAP_DEBUG_CONNS, "daemon: added %ldr\n", (long) s, 0, 0 ); ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); #ifdef SLAP_LIGHTWEIGHT_DISPATCHER WAKE_LISTENER(1); #endif } void slapd_sd_lock() { ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); } void slapd_sd_unlock() { ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); } /* * Remove the descriptor from daemon control */ void slapd_remove( ber_socket_t s, int wasactive, int wake, int locked ) { int waswriter; int wasreader; if ( !locked ) ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); assert( SLAP_SOCK_IS_ACTIVE( s )); if ( wasactive ) slap_daemon.sd_nactives--; waswriter = SLAP_SOCK_IS_WRITE(s); wasreader = SLAP_SOCK_IS_READ(s); Debug( LDAP_DEBUG_CONNS, "daemon: removing %ld%s%s\n", (long) s, wasreader ? "r" : "", waswriter ? "w" : "" ); if ( waswriter ) slap_daemon.sd_nwriters--; SLAP_DEL_SOCK(s); /* If we ran out of file descriptors, we dropped a listener from * the select() loop. Now that we're removing a session from our * control, we can try to resume a dropped listener to use. */ if ( emfile ) { int i; for ( i = 0; slap_listeners[i] != NULL; i++ ) { Listener *lr = slap_listeners[i]; if ( lr->sl_sd == AC_SOCKET_INVALID ) continue; if ( lr->sl_sd == s ) continue; if ( lr->sl_mute ) { lr->sl_mute = 0; emfile--; break; } } /* Walked the entire list without enabling anything; emfile * counter is stale. Reset it. */ if ( slap_listeners[i] == NULL ) emfile = 0; } ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); WAKE_LISTENER(wake || slapd_gentle_shutdown == 2); } void slapd_clr_write(ber_socket_t s, int wake) { ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); assert( SLAP_SOCK_IS_ACTIVE( s )); if ( SLAP_SOCK_IS_WRITE( s )) { SLAP_SOCK_CLR_WRITE( s ); slap_daemon.sd_nwriters--; } ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); WAKE_LISTENER(wake); } void slapd_set_write(ber_socket_t s, int wake) { ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); assert( SLAP_SOCK_IS_ACTIVE( s )); if ( !SLAP_SOCK_IS_WRITE( s )) { SLAP_SOCK_SET_WRITE( s ); slap_daemon.sd_nwriters++; } ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); WAKE_LISTENER(wake); } int slapd_clr_read(ber_socket_t s, int wake) { int rc = 1; ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); if ( SLAP_SOCK_IS_ACTIVE( s )) { SLAP_SOCK_CLR_READ( s ); rc = 0; } ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); if ( !rc ) WAKE_LISTENER(wake); return rc; } void slapd_set_read(ber_socket_t s, int wake) { ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); assert( SLAP_SOCK_IS_ACTIVE( s )); if (!SLAP_SOCK_IS_READ( s )) SLAP_SOCK_SET_READ( s ); ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); WAKE_LISTENER(wake); } static void slapd_close(ber_socket_t s) { Debug( LDAP_DEBUG_CONNS, "daemon: closing %ld\n", (long) s, 0, 0 ); tcp_close(s); } static void slap_free_listener_addresses(struct sockaddr **sal) { struct sockaddr **sap; if (sal == NULL) return; for (sap = sal; *sap != NULL; sap++) ch_free(*sap); ch_free(sal); } #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD) static int get_url_perms( char **exts, mode_t *perms, int *crit ) { int i; assert( exts != NULL ); assert( perms != NULL ); assert( crit != NULL ); *crit = 0; for ( i = 0; exts[ i ]; i++ ) { char *type = exts[ i ]; int c = 0; if ( type[ 0 ] == '!' ) { c = 1; type++; } if ( strncasecmp( type, LDAPI_MOD_URLEXT "=", sizeof(LDAPI_MOD_URLEXT "=") - 1 ) == 0 ) { char *value = type + ( sizeof(LDAPI_MOD_URLEXT "=") - 1 ); mode_t p = 0; int j; switch (strlen(value)) { case 4: /* skip leading '0' */ if ( value[ 0 ] != '0' ) return LDAP_OTHER; value++; case 3: for ( j = 0; j < 3; j++) { int v; v = value[ j ] - '0'; if ( v < 0 || v > 7 ) return LDAP_OTHER; p |= v << 3*(2-j); } break; case 10: for ( j = 1; j < 10; j++ ) { static mode_t m[] = { 0, S_IRUSR, S_IWUSR, S_IXUSR, S_IRGRP, S_IWGRP, S_IXGRP, S_IROTH, S_IWOTH, S_IXOTH }; static char c[] = "-rwxrwxrwx"; if ( value[ j ] == c[ j ] ) { p |= m[ j ]; } else if ( value[ j ] != '-' ) { return LDAP_OTHER; } } break; default: return LDAP_OTHER; } *crit = c; *perms = p; return LDAP_SUCCESS; } } return LDAP_OTHER; } #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */ /* port = 0 indicates AF_LOCAL */ static int slap_get_listener_addresses( const char *host, unsigned short port, struct sockaddr ***sal) { struct sockaddr **sap; #ifdef LDAP_PF_LOCAL if ( port == 0 ) { *sal = ch_malloc(2 * sizeof(void *)); if (*sal == NULL) return -1; sap = *sal; *sap = ch_malloc(sizeof(struct sockaddr_un)); if (*sap == NULL) goto errexit; sap[1] = NULL; if ( strlen(host) > (sizeof(((struct sockaddr_un *)*sap)->sun_path) - 1) ) { Debug( LDAP_DEBUG_ANY, "daemon: domain socket path (%s) too long in URL", host, 0, 0); goto errexit; } (void)memset( (void *)*sap, '\0', sizeof(struct sockaddr_un) ); (*sap)->sa_family = AF_LOCAL; strcpy( ((struct sockaddr_un *)*sap)->sun_path, host ); } else #endif { #ifdef HAVE_GETADDRINFO struct addrinfo hints, *res, *sai; int n, err; char serv[7]; memset( &hints, '\0', sizeof(hints) ); hints.ai_flags = AI_PASSIVE; hints.ai_socktype = SOCK_STREAM; hints.ai_family = slap_inet4or6; snprintf(serv, sizeof serv, "%d", port); if ( (err = getaddrinfo(host, serv, &hints, &res)) ) { Debug( LDAP_DEBUG_ANY, "daemon: getaddrinfo() failed: %s\n", AC_GAI_STRERROR(err), 0, 0); return -1; } sai = res; for (n=2; (sai = sai->ai_next) != NULL; n++) { /* EMPTY */ ; } *sal = ch_calloc(n, sizeof(void *)); if (*sal == NULL) return -1; sap = *sal; *sap = NULL; for ( sai=res; sai; sai=sai->ai_next ) { if( sai->ai_addr == NULL ) { Debug( LDAP_DEBUG_ANY, "slap_get_listener_addresses: " "getaddrinfo ai_addr is NULL?\n", 0, 0, 0 ); freeaddrinfo(res); goto errexit; } switch (sai->ai_family) { # ifdef LDAP_PF_INET6 case AF_INET6: *sap = ch_malloc(sizeof(struct sockaddr_in6)); if (*sap == NULL) { freeaddrinfo(res); goto errexit; } *(struct sockaddr_in6 *)*sap = *((struct sockaddr_in6 *)sai->ai_addr); break; # endif case AF_INET: *sap = ch_malloc(sizeof(struct sockaddr_in)); if (*sap == NULL) { freeaddrinfo(res); goto errexit; } *(struct sockaddr_in *)*sap = *((struct sockaddr_in *)sai->ai_addr); break; default: *sap = NULL; break; } if (*sap != NULL) { (*sap)->sa_family = sai->ai_family; sap++; *sap = NULL; } } freeaddrinfo(res); #else int i, n = 1; struct in_addr in; struct hostent *he = NULL; if ( host == NULL ) { in.s_addr = htonl(INADDR_ANY); } else if ( !inet_aton( host, &in ) ) { he = gethostbyname( host ); if( he == NULL ) { Debug( LDAP_DEBUG_ANY, "daemon: invalid host %s", host, 0, 0); return -1; } for (n = 0; he->h_addr_list[n]; n++) /* empty */; } *sal = ch_malloc((n+1) * sizeof(void *)); if (*sal == NULL) return -1; sap = *sal; for ( i = 0; isa_family = AF_INET; ((struct sockaddr_in *)sap[i])->sin_port = htons(port); AC_MEMCPY( &((struct sockaddr_in *)sap[i])->sin_addr, he ? (struct in_addr *)he->h_addr_list[i] : &in, sizeof(struct in_addr) ); } sap[i] = NULL; #endif } return 0; errexit: slap_free_listener_addresses(*sal); return -1; } static int slap_open_listener( const char* url, int *listeners, int *cur ) { int num, tmp, rc; Listener l; Listener *li; LDAPURLDesc *lud; unsigned short port; int err, addrlen = 0; struct sockaddr **sal, **psal; int socktype = SOCK_STREAM; /* default to COTS */ #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD) /* * use safe defaults */ int crit = 1; #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */ rc = ldap_url_parse( url, &lud ); if( rc != LDAP_URL_SUCCESS ) { Debug( LDAP_DEBUG_ANY, "daemon: listen URL \"%s\" parse error=%d\n", url, rc, 0 ); return rc; } l.sl_url.bv_val = NULL; l.sl_mute = 0; #ifdef SLAP_LIGHTWEIGHT_DISPATCHER l.sl_busy = 0; #endif #ifndef HAVE_TLS if( ldap_pvt_url_scheme2tls( lud->lud_scheme ) ) { Debug( LDAP_DEBUG_ANY, "daemon: TLS not supported (%s)\n", url, 0, 0 ); ldap_free_urldesc( lud ); return -1; } if(! lud->lud_port ) lud->lud_port = LDAP_PORT; #else l.sl_is_tls = ldap_pvt_url_scheme2tls( lud->lud_scheme ); if(! lud->lud_port ) { lud->lud_port = l.sl_is_tls ? LDAPS_PORT : LDAP_PORT; } #endif port = (unsigned short) lud->lud_port; tmp = ldap_pvt_url_scheme2proto(lud->lud_scheme); if ( tmp == LDAP_PROTO_IPC ) { #ifdef LDAP_PF_LOCAL if ( lud->lud_host == NULL || lud->lud_host[0] == '\0' ) { err = slap_get_listener_addresses(LDAPI_SOCK, 0, &sal); } else { err = slap_get_listener_addresses(lud->lud_host, 0, &sal); } #else Debug( LDAP_DEBUG_ANY, "daemon: URL scheme not supported: %s", url, 0, 0); ldap_free_urldesc( lud ); return -1; #endif } else { if( lud->lud_host == NULL || lud->lud_host[0] == '\0' || strcmp(lud->lud_host, "*") == 0 ) { err = slap_get_listener_addresses(NULL, port, &sal); } else { err = slap_get_listener_addresses(lud->lud_host, port, &sal); } } #ifdef LDAP_CONNECTIONLESS l.sl_is_udp = ( tmp == LDAP_PROTO_UDP ); #endif #if defined(LDAP_PF_LOCAL) || defined(SLAP_X_LISTENER_MOD) if ( lud->lud_exts ) { err = get_url_perms( lud->lud_exts, &l.sl_perms, &crit ); } else { l.sl_perms = S_IRWXU | S_IRWXO; } #endif /* LDAP_PF_LOCAL || SLAP_X_LISTENER_MOD */ ldap_free_urldesc( lud ); if ( err ) return -1; /* If we got more than one address returned, we need to make space * for it in the slap_listeners array. */ for ( num=0; sal[num]; num++ ) /* empty */; if ( num > 1 ) { *listeners += num-1; slap_listeners = ch_realloc( slap_listeners, (*listeners + 1) * sizeof(Listener *) ); } psal = sal; while ( *sal != NULL ) { char *af; switch( (*sal)->sa_family ) { case AF_INET: af = "IPv4"; break; #ifdef LDAP_PF_INET6 case AF_INET6: af = "IPv6"; break; #endif #ifdef LDAP_PF_LOCAL case AF_LOCAL: af = "Local"; break; #endif default: sal++; continue; } #ifdef LDAP_CONNECTIONLESS if( l.sl_is_udp ) socktype = SOCK_DGRAM; #endif l.sl_sd = socket( (*sal)->sa_family, socktype, 0); if ( l.sl_sd == AC_SOCKET_INVALID ) { int err = sock_errno(); Debug( LDAP_DEBUG_ANY, "daemon: %s socket() failed errno=%d (%s)\n", af, err, sock_errstr(err) ); sal++; continue; } #ifndef HAVE_WINSOCK if ( l.sl_sd >= dtblsize ) { Debug( LDAP_DEBUG_ANY, "daemon: listener descriptor %ld is too great %ld\n", (long) l.sl_sd, (long) dtblsize, 0 ); tcp_close( l.sl_sd ); sal++; continue; } #endif #ifdef LDAP_PF_LOCAL if ( (*sal)->sa_family == AF_LOCAL ) { unlink( ((struct sockaddr_un *)*sal)->sun_path ); } else #endif { #ifdef SO_REUSEADDR /* enable address reuse */ tmp = 1; rc = setsockopt( l.sl_sd, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof(tmp) ); if ( rc == AC_SOCKET_ERROR ) { int err = sock_errno(); Debug( LDAP_DEBUG_ANY, "slapd(%ld): " "setsockopt(SO_REUSEADDR) failed errno=%d (%s)\n", (long) l.sl_sd, err, sock_errstr(err) ); } #endif } switch( (*sal)->sa_family ) { case AF_INET: addrlen = sizeof(struct sockaddr_in); break; #ifdef LDAP_PF_INET6 case AF_INET6: #ifdef IPV6_V6ONLY /* Try to use IPv6 sockets for IPv6 only */ tmp = 1; rc = setsockopt( l.sl_sd, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &tmp, sizeof(tmp) ); if ( rc == AC_SOCKET_ERROR ) { int err = sock_errno(); Debug( LDAP_DEBUG_ANY, "slapd(%ld): " "setsockopt(IPV6_V6ONLY) failed errno=%d (%s)\n", (long) l.sl_sd, err, sock_errstr(err) ); } #endif addrlen = sizeof(struct sockaddr_in6); break; #endif #ifdef LDAP_PF_LOCAL case AF_LOCAL: #ifdef LOCAL_CREDS { int one = 1; setsockopt(l.sl_sd, 0, LOCAL_CREDS, &one, sizeof one); } #endif addrlen = sizeof(struct sockaddr_un); break; #endif } if (bind(l.sl_sd, *sal, addrlen)) { err = sock_errno(); Debug( LDAP_DEBUG_ANY, "daemon: bind(%ld) failed errno=%d (%s)\n", (long) l.sl_sd, err, sock_errstr(err) ); tcp_close( l.sl_sd ); sal++; continue; } switch ( (*sal)->sa_family ) { #ifdef LDAP_PF_LOCAL case AF_LOCAL: { char *addr = ((struct sockaddr_un *)*sal)->sun_path; l.sl_name.bv_len = strlen(addr) + sizeof("PATH=") - 1; l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len + 1 ); snprintf( l.sl_name.bv_val, l.sl_name.bv_len + 1, "PATH=%s", addr ); } break; #endif /* LDAP_PF_LOCAL */ case AF_INET: { char *s; #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP ) char addr[INET_ADDRSTRLEN]; inet_ntop( AF_INET, &((struct sockaddr_in *)*sal)->sin_addr, addr, sizeof(addr) ); s = addr; #else s = inet_ntoa( ((struct sockaddr_in *) *sal)->sin_addr ); #endif port = ntohs( ((struct sockaddr_in *)*sal) ->sin_port ); l.sl_name.bv_val = ber_memalloc( sizeof("IP=255.255.255.255:65535") ); snprintf( l.sl_name.bv_val, sizeof("IP=255.255.255.255:65535"), "IP=%s:%d", s != NULL ? s : SLAP_STRING_UNKNOWN, port ); l.sl_name.bv_len = strlen( l.sl_name.bv_val ); } break; #ifdef LDAP_PF_INET6 case AF_INET6: { char addr[INET6_ADDRSTRLEN]; inet_ntop( AF_INET6, &((struct sockaddr_in6 *)*sal)->sin6_addr, addr, sizeof addr); port = ntohs( ((struct sockaddr_in6 *)*sal)->sin6_port ); l.sl_name.bv_len = strlen(addr) + sizeof("IP= 65535"); l.sl_name.bv_val = ber_memalloc( l.sl_name.bv_len ); snprintf( l.sl_name.bv_val, l.sl_name.bv_len, "IP=%s %d", addr, port ); l.sl_name.bv_len = strlen( l.sl_name.bv_val ); } break; #endif /* LDAP_PF_INET6 */ default: Debug( LDAP_DEBUG_ANY, "daemon: unsupported address family (%d)\n", (int) (*sal)->sa_family, 0, 0 ); break; } AC_MEMCPY(&l.sl_sa, *sal, addrlen); ber_str2bv( url, 0, 1, &l.sl_url); li = ch_malloc( sizeof( Listener ) ); *li = l; slap_listeners[*cur] = li; (*cur)++; sal++; } slap_free_listener_addresses(psal); if ( l.sl_url.bv_val == NULL ) { Debug( LDAP_DEBUG_TRACE, "slap_open_listener: failed on %s\n", url, 0, 0 ); return -1; } Debug( LDAP_DEBUG_TRACE, "daemon: listener initialized %s\n", l.sl_url.bv_val, 0, 0 ); return 0; } static int sockinit(void); static int sockdestroy(void); int slapd_daemon_init( const char *urls ) { int i, j, n, rc; char **u; Debug( LDAP_DEBUG_ARGS, "daemon_init: %s\n", urls ? urls : "", 0, 0 ); ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex ); #ifdef HAVE_TCPD ldap_pvt_thread_mutex_init( &slap_daemon.tcpd_mutex ); #endif if( (rc = sockinit()) != 0 ) return rc; #ifdef HAVE_SYSCONF dtblsize = sysconf( _SC_OPEN_MAX ); #elif HAVE_GETDTABLESIZE dtblsize = getdtablesize(); #else dtblsize = FD_SETSIZE; #endif /* open a pipe (or something equivalent connected to itself). * we write a byte on this fd whenever we catch a signal. The main * loop will be select'ing on this socket, and will wake up when * this byte arrives. */ if( (rc = lutil_pair( wake_sds )) < 0 ) { Debug( LDAP_DEBUG_ANY, "daemon: lutil_pair() failed rc=%d\n", rc, 0, 0 ); return rc; } SLAP_SOCK_SET_INIT; if( urls == NULL ) urls = "ldap:///"; u = ldap_str2charray( urls, " " ); if( u == NULL || u[0] == NULL ) { Debug( LDAP_DEBUG_ANY, "daemon_init: no urls (%s) provided.\n", urls, 0, 0 ); if ( u ) ldap_charray_free( u ); return -1; } for( i=0; u[i] != NULL; i++ ) { Debug( LDAP_DEBUG_TRACE, "daemon_init: listen on %s\n", u[i], 0, 0 ); } if( i == 0 ) { Debug( LDAP_DEBUG_ANY, "daemon_init: no listeners to open (%s)\n", urls, 0, 0 ); ldap_charray_free( u ); return -1; } Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners to open...\n", i, 0, 0 ); slap_listeners = ch_malloc( (i+1)*sizeof(Listener *) ); for(n = 0, j = 0; u[n]; n++ ) { if ( slap_open_listener( u[n], &i, &j ) ) { ldap_charray_free( u ); return -1; } } slap_listeners[j] = NULL; Debug( LDAP_DEBUG_TRACE, "daemon_init: %d listeners opened\n", i, 0, 0 ); #ifdef HAVE_SLP if( slapd_register_slp ) { slapd_slp_init( urls ); slapd_slp_reg(); } #endif ldap_charray_free( u ); return !i; } int slapd_daemon_destroy(void) { connections_destroy(); tcp_close( wake_sds[1] ); tcp_close( wake_sds[0] ); sockdestroy(); #ifdef HAVE_SLP if( slapd_register_slp ) { slapd_slp_dereg(); slapd_slp_deinit(); } #endif #ifdef HAVE_TCPD ldap_pvt_thread_mutex_destroy( &slap_daemon.tcpd_mutex ); #endif ldap_pvt_thread_mutex_destroy( &slap_daemon.sd_mutex ); return 0; } static void close_listeners( int remove ) { int l; for ( l = 0; slap_listeners[l] != NULL; l++ ) { Listener *lr = slap_listeners[l]; if ( lr->sl_sd != AC_SOCKET_INVALID ) { if ( remove ) slapd_remove( lr->sl_sd, 0, 0, 0 ); #ifdef LDAP_PF_LOCAL if ( lr->sl_sa.sa_addr.sa_family == AF_LOCAL ) { unlink( lr->sl_sa.sa_un_addr.sun_path ); } #endif /* LDAP_PF_LOCAL */ slapd_close( lr->sl_sd ); } if ( lr->sl_url.bv_val ) { ber_memfree( lr->sl_url.bv_val ); } if ( lr->sl_name.bv_val ) { ber_memfree( lr->sl_name.bv_val ); } free( lr ); slap_listeners[l] = NULL; } } static int slap_listener( Listener *sl ) { Sockaddr from; ber_socket_t s; socklen_t len = sizeof(from); long id; slap_ssf_t ssf = 0; struct berval authid = BER_BVNULL; #ifdef SLAPD_RLOOKUPS char hbuf[NI_MAXHOST]; #endif char *dnsname = NULL; char *peeraddr = NULL; #ifdef LDAP_PF_LOCAL char peername[MAXPATHLEN + sizeof("PATH=")]; #elif defined(LDAP_PF_INET6) char peername[sizeof("IP=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 65535")]; #else char peername[sizeof("IP=255.255.255.255:65336")]; #endif /* LDAP_PF_LOCAL */ peername[0] = '\0'; #ifdef LDAP_CONNECTIONLESS if ( sl->sl_is_udp ) return 1; #endif # ifdef LDAP_PF_LOCAL /* FIXME: apparently accept doesn't fill * the sun_path sun_path member */ from.sa_un_addr.sun_path[0] = '\0'; # endif /* LDAP_PF_LOCAL */ s = accept( sl->sl_sd, (struct sockaddr *) &from, &len ); #ifdef SLAP_LIGHTWEIGHT_DISPATCHER /* Resume the listener FD to allow concurrent-processing of * additional incoming connections. */ sl->sl_busy = 0; WAKE_LISTENER(1); #endif if ( s == AC_SOCKET_INVALID ) { int err = sock_errno(); if( #ifdef EMFILE err == EMFILE || #endif #ifdef ENFILE err == ENFILE || #endif 0 ) { ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); emfile++; /* Stop listening until an existing session closes */ sl->sl_mute = 1; ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); } Debug( LDAP_DEBUG_ANY, "daemon: accept(%ld) failed errno=%d (%s)\n", (long) sl->sl_sd, err, sock_errstr(err) ); ldap_pvt_thread_yield(); return 0; } #ifndef HAVE_WINSOCK /* make sure descriptor number isn't too great */ if ( s >= dtblsize ) { Debug( LDAP_DEBUG_ANY, "daemon: %ld beyond descriptor table size %ld\n", (long) s, (long) dtblsize, 0 ); slapd_close(s); ldap_pvt_thread_yield(); return 0; } #endif #ifdef LDAP_DEBUG ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); /* newly accepted stream should not be in any of the FD SETS */ assert( SLAP_SOCK_NOT_ACTIVE( s )); ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); #endif #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY ) #ifdef LDAP_PF_LOCAL /* for IPv4 and IPv6 sockets only */ if ( from.sa_addr.sa_family != AF_LOCAL ) #endif /* LDAP_PF_LOCAL */ { int rc; int tmp; #ifdef SO_KEEPALIVE /* enable keep alives */ tmp = 1; rc = setsockopt( s, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof(tmp) ); if ( rc == AC_SOCKET_ERROR ) { int err = sock_errno(); Debug( LDAP_DEBUG_ANY, "slapd(%ld): setsockopt(SO_KEEPALIVE) failed " "errno=%d (%s)\n", (long) s, err, sock_errstr(err) ); } #endif #ifdef TCP_NODELAY /* enable no delay */ tmp = 1; rc = setsockopt( s, IPPROTO_TCP, TCP_NODELAY, (char *)&tmp, sizeof(tmp) ); if ( rc == AC_SOCKET_ERROR ) { int err = sock_errno(); Debug( LDAP_DEBUG_ANY, "slapd(%ld): setsockopt(TCP_NODELAY) failed " "errno=%d (%s)\n", (long) s, err, sock_errstr(err) ); } #endif } #endif Debug( LDAP_DEBUG_CONNS, "daemon: listen=%ld, new connection on %ld\n", (long) sl->sl_sd, (long) s, 0 ); switch ( from.sa_addr.sa_family ) { # ifdef LDAP_PF_LOCAL case AF_LOCAL: /* FIXME: apparently accept doesn't fill * the sun_path sun_path member */ if ( from.sa_un_addr.sun_path[0] == '\0' ) { AC_MEMCPY( from.sa_un_addr.sun_path, sl->sl_sa.sa_un_addr.sun_path, sizeof( from.sa_un_addr.sun_path ) ); } sprintf( peername, "PATH=%s", from.sa_un_addr.sun_path ); ssf = local_ssf; { uid_t uid; gid_t gid; if( getpeereid( s, &uid, &gid ) == 0 ) { authid.bv_val = ch_malloc( STRLENOF( "gidNumber=4294967295+uidNumber=4294967295," "cn=peercred,cn=external,cn=auth" ) + 1 ); authid.bv_len = sprintf( authid.bv_val, "gidNumber=%d+uidNumber=%d," "cn=peercred,cn=external,cn=auth", (int) gid, (int) uid ); assert( authid.bv_len <= STRLENOF( "gidNumber=4294967295+uidNumber=4294967295," "cn=peercred,cn=external,cn=auth" ) ); } } dnsname = "local"; break; #endif /* LDAP_PF_LOCAL */ # ifdef LDAP_PF_INET6 case AF_INET6: if ( IN6_IS_ADDR_V4MAPPED(&from.sa_in6_addr.sin6_addr) ) { peeraddr = inet_ntoa( *((struct in_addr *) &from.sa_in6_addr.sin6_addr.s6_addr[12]) ); sprintf( peername, "IP=%s:%d", peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN, (unsigned) ntohs( from.sa_in6_addr.sin6_port ) ); } else { char addr[INET6_ADDRSTRLEN]; peeraddr = (char *) inet_ntop( AF_INET6, &from.sa_in6_addr.sin6_addr, addr, sizeof addr ); sprintf( peername, "IP=%s %d", peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN, (unsigned) ntohs( from.sa_in6_addr.sin6_port ) ); } break; # endif /* LDAP_PF_INET6 */ case AF_INET: peeraddr = inet_ntoa( from.sa_in_addr.sin_addr ); sprintf( peername, "IP=%s:%d", peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN, (unsigned) ntohs( from.sa_in_addr.sin_port ) ); break; default: slapd_close(s); return 0; } if ( ( from.sa_addr.sa_family == AF_INET ) #ifdef LDAP_PF_INET6 || ( from.sa_addr.sa_family == AF_INET6 ) #endif ) { dnsname = NULL; #ifdef SLAPD_RLOOKUPS if ( use_reverse_lookup ) { char *herr; if (ldap_pvt_get_hname( (const struct sockaddr *)&from, len, hbuf, sizeof(hbuf), &herr ) == 0) { ldap_pvt_str2lower( hbuf ); dnsname = hbuf; } } #endif /* SLAPD_RLOOKUPS */ #ifdef HAVE_TCPD { int rc; ldap_pvt_thread_mutex_lock( &slap_daemon.tcpd_mutex ); rc = hosts_ctl("slapd", dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN, peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN, SLAP_STRING_UNKNOWN ); ldap_pvt_thread_mutex_unlock( &slap_daemon.tcpd_mutex ); if ( !rc ) { /* DENY ACCESS */ Statslog( LDAP_DEBUG_STATS, "fd=%ld DENIED from %s (%s)\n", (long) s, dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN, peeraddr != NULL ? peeraddr : SLAP_STRING_UNKNOWN, 0, 0 ); slapd_close(s); return 0; } } #endif /* HAVE_TCPD */ } id = connection_init(s, sl, dnsname != NULL ? dnsname : SLAP_STRING_UNKNOWN, peername, #ifdef HAVE_TLS sl->sl_is_tls ? CONN_IS_TLS : 0, #else 0, #endif ssf, authid.bv_val ? &authid : NULL ); if( authid.bv_val ) ch_free(authid.bv_val); if( id < 0 ) { Debug( LDAP_DEBUG_ANY, "daemon: connection_init(%ld, %s, %s) failed.\n", (long) s, peername, sl->sl_name.bv_val ); slapd_close(s); return 0; } Statslog( LDAP_DEBUG_STATS, "conn=%ld fd=%ld ACCEPT from %s (%s)\n", id, (long) s, peername, sl->sl_name.bv_val, 0 ); return 0; } #ifdef SLAP_LIGHTWEIGHT_DISPATCHER static void* slap_listener_thread( void* ctx, void* ptr ) { int rc; rc = slap_listener( (Listener*)ptr ); if( rc != LDAP_SUCCESS ) { Debug( LDAP_DEBUG_ANY, "listener_thread: failed %d", rc, 0, 0 ); } return (void*)NULL; } static int slap_listener_activate( Listener* sl ) { int rc; Debug( LDAP_DEBUG_TRACE, "slap_listener_activate(%d): %s\n", sl->sl_sd, sl->sl_busy ? "busy" : "", 0 ); sl->sl_busy++; rc = ldap_pvt_thread_pool_submit( &connection_pool, slap_listener_thread, (void *) sl ); if( rc != 0 ) { Debug( LDAP_DEBUG_ANY, "listener_activate(%d): submit failed (%d)\n", sl->sl_sd, rc, 0 ); } return rc; } #endif static void * slapd_daemon_task( void *ptr ) { int l; time_t last_idle_check = 0; struct timeval idle; int ebadf = 0; #define SLAPD_IDLE_CHECK_LIMIT 4 if ( global_idletimeout > 0 ) { last_idle_check = slap_get_time(); /* Set the select timeout. * Don't just truncate, preserve the fractions of * seconds to prevent sleeping for zero time. */ idle.tv_sec = global_idletimeout / SLAPD_IDLE_CHECK_LIMIT; idle.tv_usec = global_idletimeout - \ ( idle.tv_sec * SLAPD_IDLE_CHECK_LIMIT ); idle.tv_usec *= 1000000 / SLAPD_IDLE_CHECK_LIMIT; } else { idle.tv_sec = 0; idle.tv_usec = 0; } slapd_add( wake_sds[0], 0, NULL ); for ( l = 0; slap_listeners[l] != NULL; l++ ) { if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue; #ifdef LDAP_CONNECTIONLESS /* Since this is connectionless, the data port is the * listening port. The listen() and accept() calls * are unnecessary. */ if ( slap_listeners[l]->sl_is_udp ) continue; #endif if ( listen( slap_listeners[l]->sl_sd, SLAPD_LISTEN_BACKLOG ) == -1 ) { int err = sock_errno(); #ifdef LDAP_PF_INET6 /* If error is EADDRINUSE, we are trying to listen to INADDR_ANY and * we are already listening to in6addr_any, then we want to ignore * this and continue. */ if ( err == EADDRINUSE ) { int i; struct sockaddr_in sa = slap_listeners[l]->sl_sa.sa_in_addr; struct sockaddr_in6 sa6; if ( sa.sin_family == AF_INET && sa.sin_addr.s_addr == htonl(INADDR_ANY) ) { for ( i = 0 ; i < l; i++ ) { sa6 = slap_listeners[i]->sl_sa.sa_in6_addr; if ( sa6.sin6_family == AF_INET6 && !memcmp( &sa6.sin6_addr, &in6addr_any, sizeof(struct in6_addr) ) ) { break; } } if ( i < l ) { /* We are already listening to in6addr_any */ Debug( LDAP_DEBUG_CONNS, "daemon: Attempt to listen to 0.0.0.0 failed, " "already listening on ::, assuming IPv4 included\n", 0, 0, 0 ); slapd_close( slap_listeners[l]->sl_sd ); slap_listeners[l]->sl_sd = AC_SOCKET_INVALID; continue; } } } #endif Debug( LDAP_DEBUG_ANY, "daemon: listen(%s, 5) failed errno=%d (%s)\n", slap_listeners[l]->sl_url.bv_val, err, sock_errstr(err) ); return (void*)-1; } #ifdef SLAP_LIGHTWEIGHT_DISPATCHER /* make the listening socket non-blocking */ if ( ber_pvt_socket_set_nonblock( slap_listeners[l]->sl_sd, 1 ) < 0 ) { Debug( LDAP_DEBUG_ANY, "slapd_daemon_task: " "set nonblocking on a listening socket failed\n", 0, 0, 0 ); slapd_shutdown = 2; return (void*)-1; } #endif slapd_add( slap_listeners[l]->sl_sd, 0, slap_listeners[l] ); } #ifdef HAVE_NT_SERVICE_MANAGER if ( started_event != NULL ) { ldap_pvt_thread_cond_signal( &started_event ); } #endif #ifdef SLAP_SEM_LOAD_CONTROL /* * initialize count and lazyness of a semaphore */ (void) ldap_lazy_sem_init( SLAP_MAX_WORKER_THREADS + 4 /* max workers + margin */, 4 /* lazyness */ ); #endif /* initialization complete. Here comes the loop. */ while ( !slapd_shutdown ) { ber_socket_t i; int ns, nwriters; int at; ber_socket_t nfds; #if SLAP_EVENTS_ARE_INDEXED ber_socket_t nrfds, nwfds; #endif #define SLAPD_EBADF_LIMIT 16 time_t now; SLAP_EVENT_DECL; struct timeval tv; struct timeval *tvp; struct timeval cat; time_t tdelta = 1; struct re_s* rtask; now = slap_get_time(); if( ( global_idletimeout > 0 ) && difftime( last_idle_check + global_idletimeout/SLAPD_IDLE_CHECK_LIMIT, now ) < 0 ) { connections_timeout_idle( now ); last_idle_check = now; } tv = idle; #ifdef SIGHUP if( slapd_gentle_shutdown ) { ber_socket_t active; if( slapd_gentle_shutdown == 1 ) { BackendDB *be; Debug( LDAP_DEBUG_ANY, "slapd gentle shutdown\n", 0, 0, 0 ); close_listeners( 1 ); frontendDB->be_restrictops |= SLAP_RESTRICT_OP_WRITES; LDAP_STAILQ_FOREACH(be, &backendDB, be_next) { be->be_restrictops |= SLAP_RESTRICT_OP_WRITES; } slapd_gentle_shutdown = 2; } ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); active = slap_daemon.sd_nactives; ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); if( active == 0 ) { slapd_shutdown = 1; break; } } #endif at = 0; ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex ); nwriters = slap_daemon.sd_nwriters; for ( l = 0; slap_listeners[l] != NULL; l++ ) { Listener *lr = slap_listeners[l]; if ( lr->sl_sd == AC_SOCKET_INVALID ) continue; #ifdef SLAP_LIGHTWEIGHT_DISPATCHER if ( lr->sl_mute || lr->sl_busy ) #else if ( lr->sl_mute ) #endif { SLAP_SOCK_CLR_READ( lr->sl_sd ); } else { SLAP_SOCK_SET_READ( lr->sl_sd ); } } SLAP_EVENT_INIT; nfds = SLAP_EVENT_MAX; if ( global_idletimeout && slap_daemon.sd_nactives ) at = 1; ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex ); if ( at #if defined(HAVE_YIELDING_SELECT) || defined(NO_THREADS) && ( tv.tv_sec || tv.tv_usec ) #endif ) { tvp = &tv; } else { tvp = NULL; } ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex ); rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat ); while ( rtask && cat.tv_sec && cat.tv_sec <= now ) { if ( ldap_pvt_runqueue_isrunning( &slapd_rq, rtask )) { ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 ); } else { ldap_pvt_runqueue_runtask( &slapd_rq, rtask ); ldap_pvt_runqueue_resched( &slapd_rq, rtask, 0 ); ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex ); ldap_pvt_thread_pool_submit( &connection_pool, rtask->routine, (void *) rtask ); ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex ); } rtask = ldap_pvt_runqueue_next_sched( &slapd_rq, &cat ); } ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex ); if ( rtask && cat.tv_sec ) { time_t diff = difftime( cat.tv_sec, now ); if ( diff == 0 ) diff = tdelta; if ( tvp == NULL || diff < tv.tv_sec ) { tv.tv_sec = diff; tv.tv_usec = 0; tvp = &tv; } } for ( l = 0; slap_listeners[l] != NULL; l++ ) { Listener *lr = slap_listeners[l]; if ( lr->sl_sd == AC_SOCKET_INVALID ) { continue; } if ( lr->sl_mute ) { Debug( LDAP_DEBUG_CONNS, "daemon: select: listen=%d muted\n", lr->sl_sd, 0, 0 ); continue; } #ifdef SLAP_LIGHTWEIGHT_DISPATCHER if ( lr->sl_busy ) { Debug( LDAP_DEBUG_CONNS, "daemon: select: listen=%d busy\n", lr->sl_sd, 0, 0 ); continue; } #endif Debug( LDAP_DEBUG_CONNS, "daemon: select: listen=%d active_threads=%d tvp=%s\n", lr->sl_sd, at, tvp == NULL ? "NULL" : "zero" ); } switch(ns = SLAP_EVENT_WAIT(tvp)) { case -1: { /* failure - try again */ int err = sock_errno(); if( err != EINTR ) { ebadf++; /* Don't log unless we got it twice in a row */ if ( !( ebadf & 1 )) { Debug( LDAP_DEBUG_ANY, "daemon: select failed count %d err (%d): %s\n", ebadf, err, sock_errstr(err) ); } if ( ebadf >= SLAPD_EBADF_LIMIT ) slapd_shutdown = 2; } } continue; case 0: /* timeout - let threads run */ ebadf = 0; #ifndef HAVE_YIELDING_SELECT Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n", 0, 0, 0 ); ldap_pvt_thread_yield(); #endif continue; default: /* something happened - deal with it */ if( slapd_shutdown ) continue; ebadf = 0; Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptor%s\n", ns, ns != 1 ? "s" : "", 0 ); /* FALL THRU */ } #if SLAP_EVENTS_ARE_INDEXED if ( SLAP_EVENT_IS_READ( wake_sds[0] )) { char c[BUFSIZ]; SLAP_EVENT_CLR_READ( wake_sds[0] ); waking = 0; tcp_read( wake_sds[0], c, sizeof(c) ); Debug( LDAP_DEBUG_CONNS, "daemon: waked\n", 0, 0, 0 ); continue; } /* The event slot equals the descriptor number - this is * true for Unix select and poll. We treat Windows select * like this too, even though it's a kludge. */ for ( l = 0; slap_listeners[l] != NULL; l++ ) { int rc; if ( ns <= 0 ) break; if ( slap_listeners[l]->sl_sd == AC_SOCKET_INVALID ) continue; #ifdef LDAP_CONNECTIONLESS if ( slap_listeners[l]->sl_is_udp ) continue; #endif if ( !SLAP_EVENT_IS_READ( slap_listeners[l]->sl_sd )) continue; /* clear events */ SLAP_EVENT_CLR_READ( slap_listeners[l]->sl_sd ); SLAP_EVENT_CLR_WRITE( slap_listeners[l]->sl_sd ); ns--; #ifdef SLAP_LIGHTWEIGHT_DISPATCHER rc = slap_listener_activate(slap_listeners[l]); #else rc = slap_listener(slap_listeners[l]); #endif } /* bypass the following tests if no descriptors left */ if ( ns <= 0 ) { #ifndef HAVE_YIELDING_SELECT ldap_pvt_thread_yield(); #endif continue; } Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 ); #ifdef HAVE_WINSOCK nrfds = readfds.fd_count; nwfds = writefds.fd_count; for ( i = 0; i < readfds.fd_count; i++ ) { Debug( LDAP_DEBUG_CONNS, " %d%s", readfds.fd_array[i], "r", 0 ); } for ( i = 0; i < writefds.fd_count; i++ ) { Debug( LDAP_DEBUG_CONNS, " %d%s", writefds.fd_array[i], "w", 0 ); } #else nrfds = 0; nwfds = 0; for ( i = 0; i < nfds; i++ ) { int r, w; r = SLAP_EVENT_IS_READ( i ); /* writefds was not initialized if nwriters was zero */ w = nwriters ? SLAP_EVENT_IS_WRITE( i ) : 0; if ( r || w ) { Debug( LDAP_DEBUG_CONNS, " %d%s%s", i, r ? "r" : "", w ? "w" : "" ); if ( r ) { nrfds++; ns--; } if ( w ) { nwfds++; ns--; } } if ( ns <= 0 ) break; } #endif Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 ); /* loop through the writers */ for ( i = 0; nwfds > 0; i++ ) { ber_socket_t wd; #ifdef HAVE_WINSOCK wd = writefds.fd_array[i]; #else if( ! SLAP_EVENT_IS_WRITE( i ) ) continue; wd = i; #endif SLAP_EVENT_CLR_WRITE( wd ); nwfds--; Debug( LDAP_DEBUG_CONNS, "daemon: write active on %d\n", wd, 0, 0 ); /* * NOTE: it is possible that the connection was closed * and that the stream is now inactive. * connection_write() must validate the stream is still * active. * * ITS#4338: if the stream is invalid, there is no need to * close it here. It has already been closed in connection.c. */ if ( connection_write( wd ) < 0 ) { if ( SLAP_EVENT_IS_READ( wd )) { SLAP_EVENT_CLR_READ( (unsigned) wd ); nrfds--; } } } for ( i = 0; nrfds > 0; i++ ) { ber_socket_t rd; #ifdef HAVE_WINSOCK rd = readfds.fd_array[i]; #else if( ! SLAP_EVENT_IS_READ( i ) ) continue; rd = i; #endif SLAP_EVENT_CLR_READ( rd ); nrfds--; Debug ( LDAP_DEBUG_CONNS, "daemon: read activity on %d\n", rd, 0, 0 ); /* * NOTE: it is possible that the connection was closed * and that the stream is now inactive. * connection_read() must valid the stream is still * active. */ #ifdef SLAP_LIGHTWEIGHT_DISPATCHER connection_read_activate( rd ); #else connection_read( rd ); #endif } #else /* !SLAP_EVENTS_ARE_INDEXED */ /* FIXME */ /* The events are returned in an arbitrary list. This is true * for /dev/poll, epoll and kqueue. In order to prioritize things * so that we can handle wake_sds first, listeners second, and then * all other connections last (as we do for select), we would need * to use multiple event handles and cascade them. * * That seems like a bit of hassle. So the wake_sds check has been * skipped. For epoll and kqueue we can associate arbitrary data with * an event, so we could use pointers to the listener structure * instead of just the file descriptor. For /dev/poll we have to * search the listeners array for a matching descriptor. * * We now handle wake events when we see them; they are not given * higher priority. */ #ifdef LDAP_DEBUG Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 ); for (i=0; isl_is_udp) #endif ) { continue; } /* Don't log internal wake events */ if ( SLAP_EVENT_FD( i ) == wake_sds[0] ) continue; r = SLAP_EVENT_IS_READ( i ); w = SLAP_EVENT_IS_WRITE( i ); if ( r || w ) { Debug( LDAP_DEBUG_CONNS, " %d%s%s", SLAP_EVENT_FD(i), r ? "r" : "", w ? "w" : "" ); } } Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 ); #endif for (i=0; isl_is_udp ) { continue; } id = connection_init( lr->sl_sd, lr, "", "", CONN_IS_UDP, (slap_ssf_t) 0, NULL ); if( id < 0 ) { Debug( LDAP_DEBUG_TRACE, "connectionless_init: failed on %s (%d)\n", lr->sl_url, lr->sl_sd, 0 ); return -1; } lr->sl_is_udp++; } return 0; } #endif /* LDAP_CONNECTIONLESS */ int slapd_daemon( void ) { int rc; connections_init(); #ifdef LDAP_CONNECTIONLESS connectionless_init(); #endif #define SLAPD_LISTENER_THREAD 1 #if defined( SLAPD_LISTENER_THREAD ) { ldap_pvt_thread_t listener_tid; /* listener as a separate THREAD */ rc = ldap_pvt_thread_create( &listener_tid, 0, slapd_daemon_task, NULL ); if ( rc != 0 ) { Debug( LDAP_DEBUG_ANY, "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 ); return rc; } /* wait for the listener thread to complete */ ldap_pvt_thread_join( listener_tid, (void *) NULL ); } #else /* experimental code */ slapd_daemon_task( NULL ); #endif return 0; } static int sockinit(void) { #if defined( HAVE_WINSOCK2 ) WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 2, 0 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { /* Tell the user that we couldn't find a usable */ /* WinSock DLL. */ return -1; } /* Confirm that the WinSock DLL supports 2.0.*/ /* Note that if the DLL supports versions greater */ /* than 2.0 in addition to 2.0, it will still return */ /* 2.0 in wVersion since that is the version we */ /* requested. */ if ( LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 0 ) { /* Tell the user that we couldn't find a usable */ /* WinSock DLL. */ WSACleanup(); return -1; } /* The WinSock DLL is acceptable. Proceed. */ #elif defined( HAVE_WINSOCK ) WSADATA wsaData; if ( WSAStartup( 0x0101, &wsaData ) != 0 ) return -1; #endif return 0; } static int sockdestroy(void) { #if defined( HAVE_WINSOCK2 ) || defined( HAVE_WINSOCK ) WSACleanup(); #endif return 0; } RETSIGTYPE slap_sig_shutdown( int sig ) { #if 0 Debug(LDAP_DEBUG_TRACE, "slap_sig_shutdown: signal %d\n", sig, 0, 0); #endif /* * If the NT Service Manager is controlling the server, we don't * want SIGBREAK to kill the server. For some strange reason, * SIGBREAK is generated when a user logs out. */ #if HAVE_NT_SERVICE_MANAGER && SIGBREAK if (is_NT_Service && sig == SIGBREAK) { /* empty */; } else #endif #ifdef SIGHUP if (sig == SIGHUP && global_gentlehup && slapd_gentle_shutdown == 0) { slapd_gentle_shutdown = 1; } else #endif { slapd_shutdown = 1; } WAKE_LISTENER(1); /* reinstall self */ (void) SIGNAL_REINSTALL( sig, slap_sig_shutdown ); } RETSIGTYPE slap_sig_wake( int sig ) { WAKE_LISTENER(1); /* reinstall self */ (void) SIGNAL_REINSTALL( sig, slap_sig_wake ); } void slapd_add_internal(ber_socket_t s, int isactive) { slapd_add(s, isactive, NULL); } Listener ** slapd_get_listeners(void) { return slap_listeners; } void slap_wake_listener() { WAKE_LISTENER(1); }