2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2004 The OpenLDAP Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted only as authorized by the OpenLDAP
11 * A copy of this license is available in file LICENSE in the
12 * top-level directory of the distribution or, alternatively, at
13 * <http://www.OpenLDAP.org/license.html>.
15 /* Portions Copyright (c) 1996 Regents of the University of Michigan.
16 * All rights reserved.
18 * Redistribution and use in source and binary forms are permitted
19 * provided that this notice is preserved and that due credit is given
20 * to the University of Michigan at Ann Arbor. The name of the University
21 * may not be used to endorse or promote products derived from this
22 * software without specific prior written permission. This software
23 * is provided ``as is'' without express or implied warranty.
26 * This work was originally developed by the University of Michigan
27 * (as part of U-MICH LDAP).
30 /* slurp.h - Standalone Ldap Update Replication Daemon (slurpd) */
35 #if !defined(HAVE_WINSOCK) && !defined(LDAP_SYSLOG)
41 #include <ac/signal.h>
42 #include <ac/syslog.h>
45 #include <sys/types.h>
50 #define ldap_debug slurp_debug
53 #include "ldap_pvt_thread.h"
54 #include "ldap_defaults.h"
58 /* should be moved to portable.h.nt */
59 #define ftruncate(a,b) _chsize(a,b)
60 #define truncate(a,b) _lclose( _lcreat(a, 0))
66 #define SERVICE_NAME OPENLDAP_PACKAGE "-slurpd"
68 /* Default directory for slurpd's private copy of replication logs */
69 #define DEFAULT_SLURPD_REPLICA_DIR LDAP_RUNDIR LDAP_DIRSEP "openldap-slurp"
71 /* Default name for slurpd's private copy of the replication log */
72 #define DEFAULT_SLURPD_REPLOGFILE "slurpd.replog"
74 /* Name of file which stores saved slurpd state info, for restarting */
75 #define DEFAULT_SLURPD_STATUS_FILE "slurpd.status"
77 /* slurpd dump file - contents of rq struct are written here (debugging) */
78 #define SLURPD_DUMPFILE LDAP_TMPDIR LDAP_DIRSEP "slurpd.dump"
80 /* Amount of time to sleep if no more work to do */
81 #define DEFAULT_NO_WORK_INTERVAL 3
83 /* The time we wait between checks to see if the replog file needs trimming */
84 #define TRIMCHECK_INTERVAL ( 60 * 5 )
86 /* Only try to trim slurpd replica files larger than this size */
87 #define MIN_TRIM_FILESIZE ( 10L * 1024L )
89 /* Maximum line length we can read from replication log */
90 #define REPLBUFLEN 256
95 #define TLS_CRITICAL 2
97 /* Rejection records are prefaced with this string */
98 #define ERROR_STR "ERROR"
100 /* Strings found in replication entries */
101 #define T_CHANGETYPESTR "changetype"
102 #define T_CHANGETYPE 1
103 #define T_TIMESTR "time"
108 #define T_ADDCTSTR "add"
110 #define T_MODIFYCTSTR "modify"
112 #define T_DELETECTSTR "delete"
114 #define T_MODRDNCTSTR "modrdn"
115 #define T_MODDNCTSTR "moddn"
116 #define T_RENAMECTSTR "rename"
119 #define T_MODOPADDSTR "add"
121 #define T_MODOPREPLACESTR "replace"
122 #define T_MODOPREPLACE 9
123 #define T_MODOPDELETESTR "delete"
124 #define T_MODOPDELETE 10
125 #define T_MODOPINCREMENTSTR "increment"
126 #define T_MODOPINCREMENT 11
127 #define T_MODSEPSTR "-"
130 #define T_NEWRDNSTR "newrdn"
131 #define T_DELOLDRDNSTR "deleteoldrdn"
132 #define T_NEWSUPSTR "newsuperior"
136 /* Config file keywords */
137 #define HOSTSTR "host"
139 #define ATTRSTR "attr"
140 #define SUFFIXSTR "suffix"
141 #define BINDDNSTR "binddn"
142 #define BINDMETHSTR "bindmethod"
143 #define KERBEROSSTR "kerberos"
144 #define SIMPLESTR "simple"
145 #define SASLSTR "sasl"
146 #define CREDSTR "credentials"
147 #define OLDAUTHCSTR "bindprincipal"
148 #define AUTHCSTR "authcID"
149 #define AUTHZSTR "authzID"
150 #define SRVTABSTR "srvtab"
151 #define SASLMECHSTR "saslmech"
152 #define REALMSTR "realm"
153 #define SECPROPSSTR "secprops"
154 #define STARTTLSSTR "starttls"
156 #define CRITICALSTR "critical"
158 #define REPLICA_SLEEP_TIME ( 10 )
160 /* Enumeration of various types of bind failures */
162 #define BIND_ERR_BADLDP 1
163 #define BIND_ERR_OPEN 2
164 #define BIND_ERR_BAD_ATYPE 3
165 #define BIND_ERR_SIMPLE_FAILED 4
166 #define BIND_ERR_KERBEROS_FAILED 5
167 #define BIND_ERR_BADRI 6
168 #define BIND_ERR_VERSION 7
169 #define BIND_ERR_REFERRALS 8
170 #define BIND_ERR_MANAGEDSAIT 9
171 #define BIND_ERR_SASL_FAILED 10
172 #define BIND_ERR_TLS_FAILED 11
174 /* Return codes for do_ldap() */
176 #define DO_LDAP_ERR_RETRYABLE 1
177 #define DO_LDAP_ERR_FATAL 2
180 * Types of counts one can request from the Rq rq_getcount()
184 #define RQ_COUNT_ALL 1
185 /* all elements with nonzero refcnt */
186 #define RQ_COUNT_NZRC 2
188 /* Amount of time, in seconds, for a thread to sleep when it encounters
189 * a retryable error in do_ldap().
191 #define RETRY_SLEEP_TIME 60
197 * ****************************************************************************
198 * Data types for replication queue and queue elements.
199 * ****************************************************************************
204 * Replica host information. An Ri struct will contain an array of these,
205 * with one entry for each replica. The end of the array is signaled
206 * by a NULL value in the rh_hostname field.
209 char *rh_hostname; /* replica hostname */
210 int rh_port; /* replica port */
215 * Per-replica information.
218 * - Private data should not be manipulated expect by Ri member functions.
220 typedef struct ri Ri;
223 char *ri_hostname; /* canonical hostname of replica */
224 int ri_port; /* port where slave slapd running */
225 char *ri_uri; /* e.g. "ldaps://ldap-1.example.com:636" */
226 LDAP *ri_ldp; /* LDAP struct for this replica */
227 int ri_tls; /* TLS: 0=no, 1=yes, 2=critical */
228 int ri_bind_method; /* AUTH_SIMPLE or AUTH_KERBEROS */
229 char *ri_bind_dn; /* DN to bind as when replicating */
230 char *ri_password; /* Password for any method */
231 char *ri_secprops; /* SASL security properties */
232 char *ri_realm; /* realm for any mechanism */
233 char *ri_authcId; /* authentication ID for any mechanism */
234 char *ri_authzId; /* authorization ID for any mechanism */
235 char *ri_srvtab; /* srvtab file for kerberos bind */
236 char *ri_saslmech; /* SASL mechanism to use */
237 struct re *ri_curr; /* current repl entry being processed */
238 struct stel *ri_stel; /* pointer to Stel for this replica */
240 ri_seq; /* seq number of last repl */
241 ldap_pvt_thread_t ri_tid; /* ID of thread for this replica */
243 /* Member functions */
244 int (*ri_process) LDAP_P(( Ri * )); /* process the next repl entry */
245 void (*ri_wake) LDAP_P(( Ri * )); /* wake up a sleeping thread */
251 * Information about one particular modification to make. This data should
252 * be considered private to routines in re.c, and to routines in ri.c.
256 char *mi_type; /* attr or type */
257 char *mi_val; /* value */
258 int mi_len; /* length of mi_val */
264 * Information about one particular replication entry. Only routines in
265 * re.c and rq.c should touch the private data. Other routines should
266 * only use member functions.
268 typedef struct re Re;
271 ldap_pvt_thread_mutex_t
272 re_mutex; /* mutex for this Re */
273 int re_refcnt; /* ref count, 0 = done */
274 time_t re_timestamp; /* timestamp of this re */
275 int re_seq; /* sequence number */
276 Rh *re_replicas; /* array of replica info */
277 char *re_dn; /* dn of entry being modified */
278 int re_changetype; /* type of modification */
279 Mi *re_mods; /* array of modifications to make */
280 struct re *re_next; /* pointer to next element */
282 /* Public functions */
283 int (*re_free) LDAP_P(( Re * )); /* free an re struct */
284 Re *(*re_getnext) LDAP_P(( Re * )); /* return next Re in linked list */
285 int (*re_parse) LDAP_P(( Re *, char * )); /* parse replication log entry */
286 int (*re_write) LDAP_P(( Ri *, Re *, FILE * )); /* write repl. log entry */
287 void (*re_dump) LDAP_P(( Re *, FILE * )); /* debugging - print contents */
288 int (*re_lock) LDAP_P(( Re * )); /* lock this re */
289 int (*re_unlock) LDAP_P(( Re * )); /* unlock this re */
290 int (*re_decrefcnt) LDAP_P(( Re * )); /* decrement the refcnt */
291 int (*re_getrefcnt) LDAP_P(( Re * )); /* get the refcnt */
298 * Definition for the queue of replica information. Private data is
299 * private to rq.c. Other routines should only touch public data or
300 * use member functions. Note that although we have a member function
301 * for locking the queue's mutex, we need to expose the rq_mutex
302 * variable so routines in ri.c can use it as a mutex for the
303 * rq_more condition variable.
305 typedef struct rq Rq;
309 Re *rq_head; /* pointer to head */
310 Re *rq_tail; /* pointer to tail */
311 int rq_nre; /* total number of Re's in queue */
312 int rq_ndel; /* number of deleted Re's in queue */
313 time_t rq_lasttrim; /* Last time we trimmed file */
316 ldap_pvt_thread_mutex_t
317 rq_mutex; /* mutex for whole queue */
318 ldap_pvt_thread_cond_t
319 rq_more; /* condition var - more work added */
321 /* Member functions */
322 Re * (*rq_gethead) LDAP_P(( Rq * )); /* get the element at head */
323 Re * (*rq_getnext) LDAP_P(( Re * )); /* get the next element */
324 int (*rq_delhead) LDAP_P(( Rq * )); /* delete the element at head */
325 int (*rq_add) LDAP_P(( Rq *, char * )); /* add at tail */
326 void (*rq_gc) LDAP_P(( Rq * )); /* garbage-collect queue */
327 int (*rq_lock) LDAP_P(( Rq * )); /* lock the queue */
328 int (*rq_unlock) LDAP_P(( Rq * )); /* unlock the queue */
329 int (*rq_needtrim) LDAP_P(( Rq * )); /* see if queue needs trimming */
330 int (*rq_write) LDAP_P(( Rq *, FILE * )); /*write Rq contents to file*/
331 int (*rq_getcount) LDAP_P(( Rq *, int )); /* return queue counts */
332 void (*rq_dump) LDAP_P(( Rq * )); /* debugging - print contents */
337 * An Stel (status element) contains information about one replica.
338 * Stel structs are associated with the St (status) struct, defined
341 typedef struct stel {
342 char *hostname; /* host name of replica */
343 int port; /* port number of replica */
344 time_t last; /* timestamp of last successful repl */
345 int seq; /* Sequence number of last repl */
350 * An St struct in an in-core structure which contains the current
351 * slurpd state. Most importantly, it contains an array of Stel
352 * structs which contain the timestamp and sequence number of the last
353 * successful replication for each replica. The st_write() member
354 * function is called periodically to flush status information to
355 * disk. At startup time, slurpd checks for the status file, and
356 * if present, uses the timestamps to avoid "replaying" replications
357 * which have already been sent to a given replica.
359 typedef struct st St;
362 ldap_pvt_thread_mutex_t
363 st_mutex; /* mutex to serialize access */
364 Stel **st_data; /* array of pointers to Stel structs */
365 int st_nreplicas; /* number of repl hosts */
366 int st_err_logged; /* 1 if fopen err logged */
367 FILE *st_fp; /* st file kept open */
368 FILE *st_lfp; /* lockfile fp */
370 /* Public member functions */
371 int (*st_update) LDAP_P(( St *, Stel*, Re* ));/*update entry for a host*/
372 Stel*(*st_add) LDAP_P(( St *, Ri * )); /*add a new repl host*/
373 int (*st_write) LDAP_P(( St * )); /* write status to disk */
374 int (*st_read) LDAP_P(( St * )); /* read status info from disk */
375 int (*st_lock) LDAP_P(( St * )); /* read status info from disk */
376 int (*st_unlock) LDAP_P(( St * )); /* read status info from disk */
379 #if defined( HAVE_LWP )
381 thread_t tl_tid; /* thread being managed */
382 time_t tl_wake; /* time thread should be resumed */
383 struct tl *tl_next; /* next node in list */
390 #endif /* HAVE_LWP */
393 * Public functions used to instantiate and initialize queue objects.
395 extern int Ri_init LDAP_P(( Ri **ri ));
396 extern int Rq_init LDAP_P(( Rq **rq ));
397 extern int Re_init LDAP_P(( Re **re ));
399 #include "proto-slurp.h"
403 #endif /* _SLURPD_H_ */