static void
tx_sde(isc_task_t *task, isc_event_t *event) {
isc_result_t isc_result;
UNUSED(task);
UNUSED(event);
/*
* Signal shutdown processing complete.
*/
isc_result = isc_mutex_lock(&Tx_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_lock failed %s\n",
isc_result_totext(isc_result));
++Tx_nprobs;
}
isc_result = isc_condition_signal(&Tx_cv);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_condition_signal failed %s\n",
isc_result_totext(isc_result));
++Tx_nprobs;
}
isc_result = isc_mutex_unlock(&Tx_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_unlock failed %s\n",
isc_result_totext(isc_result));
++Tx_nprobs;
}
isc_event_free(&event);
}
static void
t5_start_event(isc_task_t *task, isc_event_t *event) {
isc_result_t isc_result;
UNUSED(task);
t_info("t5_start_event\n");
isc_result = isc_mutex_lock(&T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_lock failed %s\n",
isc_result_totext(isc_result));
++T5_nprobs;
}
while (! T5_startflag) {
(void) isc_condition_wait(&T5_cv, &T5_mx);
}
isc_result = isc_mutex_unlock(&T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_unlock failed %s\n",
isc_result_totext(isc_result));
++T5_nprobs;
}
isc_event_free(&event);
}
static isc_result_t
odbc_findzone(void *driverarg, void *dbdata, const char *name)
{
isc_result_t result;
dbinstance_t *dbi = NULL;
UNUSED(driverarg);
/* run the query and get the result set from the database. */
/* if result != ISC_R_SUCCESS cursor and mutex already cleaned up. */
/* so we don't have to do it here. */
result = odbc_get_resultset(name, NULL, NULL, FINDZONE, dbdata, &dbi);
/* Check that we got a result set with data */
if (result == ISC_R_SUCCESS &&
!sqlOK(SQLFetch(((odbc_db_t *) (dbi->dbconn))->stmnt))) {
result = ISC_R_NOTFOUND;
}
if (dbi != NULL) {
/* get rid of result set, we are done with it. */
SQLCloseCursor(((odbc_db_t *) (dbi->dbconn))->stmnt);
#ifdef ISC_PLATFORM_USETHREADS
/* free lock on dbi so someone else can use it. */
isc_mutex_unlock(&dbi->instance_lock);
#endif
}
return result;
}
/*% Determine if the client is allowed to perform a zone transfer */
static isc_result_t
odbc_allowzonexfr(void *driverarg, void *dbdata, const char *name,
const char *client)
{
isc_result_t result;
dbinstance_t *dbi = NULL;
UNUSED(driverarg);
/* first check if the zone is supported by the database. */
result = odbc_findzone(driverarg, dbdata, name);
if (result != ISC_R_SUCCESS)
return (ISC_R_NOTFOUND);
/*
* if we get to this point we know the zone is supported by
* the database. the only questions now are is the zone
* transfer is allowed for this client and did the config file
* have an allow zone xfr query
*
* Run our query, and get a result set from the database. if
* result != ISC_R_SUCCESS cursor and mutex already cleaned
* up, so we don't have to do it here.
*/
result = odbc_get_resultset(name, NULL, client, ALLOWXFR,
dbdata, &dbi);
/* if we get "not implemented", send it along. */
if (result == ISC_R_NOTIMPLEMENTED)
return result;
/* Check that we got a result set with data */
if (result == ISC_R_SUCCESS &&
!sqlOK(SQLFetch(((odbc_db_t *) (dbi->dbconn))->stmnt))) {
result = ISC_R_NOPERM;
}
if (dbi != NULL) {
/* get rid of result set, we are done with it. */
SQLCloseCursor(((odbc_db_t *) (dbi->dbconn))->stmnt);
#ifdef ISC_PLATFORM_USETHREADS
/* free lock on dbi so someone else can use it. */
isc_mutex_unlock(&dbi->instance_lock);
#endif
}
return result;
}
static void
t5_once_event(isc_task_t *task, isc_event_t *event) {
isc_result_t isc_result;
t_info("t5_once_event\n");
/*
* Allow task1 to start processing events.
*/
isc_result = isc_mutex_lock(&T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_lock failed %s\n",
isc_result_totext(isc_result));
++T5_nprobs;
}
T5_startflag = 1;
isc_result = isc_condition_broadcast(&T5_cv);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_condition_broadcast failed %s\n",
isc_result_totext(isc_result));
++T5_nprobs;
}
isc_result = isc_mutex_unlock(&T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_unlock failed %s\n",
isc_result_totext(isc_result));
++T5_nprobs;
}
isc_event_free(&event);
isc_task_shutdown(task);
}
static inline void
CUNLOCK(void) {
RUNTIME_CHECK(isc_mutex_unlock(&client_lock) == ISC_R_SUCCESS);
}
/*%
* This function is the real core of the driver. Zone, record
* and client strings are passed in (or NULL is passed if the
* string is not available). The type of query we want to run
* is indicated by the query flag, and the dbdata object is passed
* passed in to. dbdata really holds either:
* 1) a list of database instances (in multithreaded mode) OR
* 2) a single database instance (in single threaded mode)
* The function will construct the query and obtain an available
* database instance (DBI). It will then run the query and hopefully
* obtain a result set. Postgres is nice, in that once the result
* set is returned, we can make the db connection available for another
* thread to use, while this thread continues on. So, the DBI is made
* available ASAP by unlocking the instance_lock after we have cleaned
* it up properly.
*/
static isc_result_t
postgres_get_resultset(const char *zone, const char *record,
const char *client, unsigned int query,
void *dbdata, PGresult **rs)
{
isc_result_t result;
dbinstance_t *dbi = NULL;
char *querystring = NULL;
unsigned int i = 0;
unsigned int j = 0;
/* temporarily get a unique thread # */
unsigned int dlz_thread_num = 1+(int) (1000.0*rand()/(RAND_MAX+1.0));
REQUIRE(*rs == NULL);
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d Getting DBI", dlz_thread_num);
#endif
/* get db instance / connection */
#ifdef ISC_PLATFORM_USETHREADS
/* find an available DBI from the list */
dbi = postgres_find_avail_conn((db_list_t *) dbdata);
#else /* ISC_PLATFORM_USETHREADS */
/*
* only 1 DBI - no need to lock instance lock either
* only 1 thread in the whole process, no possible contention.
*/
dbi = (dbinstance_t *) dbdata;
#endif /* ISC_PLATFORM_USETHREADS */
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d Got DBI - checking query", dlz_thread_num);
#endif
/* if DBI is null, can't do anything else */
if (dbi == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
/* what type of query are we going to run? */
switch(query) {
case ALLNODES:
/*
* if the query was not passed in from the config file
* then we can't run it. return not_implemented, so
* it's like the code for that operation was never
* built into the driver.... AHHH flexibility!!!
*/
if (dbi->allnodes_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
break;
case ALLOWXFR:
/* same as comments as ALLNODES */
if (dbi->allowxfr_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
break;
case AUTHORITY:
/* same as comments as ALLNODES */
if (dbi->authority_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
break;
case FINDZONE:
/* this is required. It's the whole point of DLZ! */
if (dbi->findzone_q == NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2),
"No query specified for findzone. "
"Findzone requires a query");
result = ISC_R_FAILURE;
goto cleanup;
}
break;
case LOOKUP:
/* this is required. It's also a major point of DLZ! */
if (dbi->lookup_q == NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2),
"No query specified for lookup. "
"Lookup requires a query");
result = ISC_R_FAILURE;
goto cleanup;
}
break;
default:
/*
* this should never happen. If it does, the code is
* screwed up!
*/
UNEXPECTED_ERROR(__FILE__, __LINE__,
"Incorrect query flag passed to "
"postgres_get_resultset");
result = ISC_R_UNEXPECTED;
goto cleanup;
}
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d checked query", dlz_thread_num);
#endif
/*
* was a zone string passed? If so, make it safe for use in
* queries.
*/
if (zone != NULL) {
dbi->zone = postgres_escape_string(zone);
if (dbi->zone == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else { /* no string passed, set the string pointer to NULL */
dbi->zone = NULL;
}
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d did zone", dlz_thread_num);
#endif
/*
* was a record string passed? If so, make it safe for use in
* queries.
*/
if (record != NULL) {
dbi->record = postgres_escape_string(record);
if (dbi->record == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else { /* no string passed, set the string pointer to NULL */
dbi->record = NULL;
}
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d did record", dlz_thread_num);
#endif
/*
* was a client string passed? If so, make it safe for use in
* queries.
*/
if (client != NULL) {
dbi->client = postgres_escape_string(client);
if (dbi->client == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else { /* no string passed, set the string pointer to NULL */
dbi->client = NULL;
}
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d did client", dlz_thread_num);
#endif
/*
* what type of query are we going to run?
* this time we build the actual query to run.
*/
switch(query) {
case ALLNODES:
querystring = build_querystring(ns_g_mctx, dbi->allnodes_q);
break;
case ALLOWXFR:
querystring = build_querystring(ns_g_mctx, dbi->allowxfr_q);
break;
case AUTHORITY:
querystring = build_querystring(ns_g_mctx, dbi->authority_q);
break;
case FINDZONE:
querystring = build_querystring(ns_g_mctx, dbi->findzone_q);
break;
case LOOKUP:
querystring = build_querystring(ns_g_mctx, dbi->lookup_q);
break;
default:
/*
* this should never happen. If it does, the code is
* screwed up!
*/
UNEXPECTED_ERROR(__FILE__, __LINE__,
"Incorrect query flag passed to "
"postgres_get_resultset");
result = ISC_R_UNEXPECTED;
goto cleanup;
}
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d built query", dlz_thread_num);
#endif
/* if the querystring is null, Bummer, outta RAM. UPGRADE TIME!!! */
if (querystring == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d query is '%s'", dlz_thread_num, querystring);
#endif
/*
* output the full query string during debug so we can see
* what lame error the query has.
*/
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(1),
"\nQuery String: %s\n", querystring);
/* attempt query up to 3 times. */
for (j=0; j < 3; j++) {
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d executing query for %d time",
dlz_thread_num, j);
#endif
/* try to get result set */
*rs = PQexec((PGconn *)dbi->dbconn, querystring );
result = ISC_R_SUCCESS;
/*
* if result set is null, reset DB connection, max 3
* attempts.
*/
for (i=0; *rs == NULL && i < 3; i++) {
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d resetting connection",
dlz_thread_num);
#endif
result = ISC_R_FAILURE;
PQreset((PGconn *) dbi->dbconn);
/* connection ok, break inner loop */
if (PQstatus((PGconn *) dbi->dbconn) == CONNECTION_OK)
break;
}
/* result set ok, break outter loop */
if (PQresultStatus(*rs) == PGRES_TUPLES_OK) {
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d rs ok", dlz_thread_num);
#endif
break;
} else {
/* we got a result set object, but it's not right. */
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d clearing rs", dlz_thread_num);
#endif
PQclear(*rs); /* get rid of it */
/* in case this was the last attempt */
result = ISC_R_FAILURE;
}
}
cleanup:
/* it's always good to cleanup after yourself */
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d cleaning up", dlz_thread_num);
#endif
/* if we couldn't even allocate DBI, just return NULL */
if (dbi == NULL)
return ISC_R_FAILURE;
/* free dbi->zone string */
if (dbi->zone != NULL)
isc_mem_free(ns_g_mctx, dbi->zone);
/* free dbi->record string */
if (dbi->record != NULL)
isc_mem_free(ns_g_mctx, dbi->record);
/* free dbi->client string */
if (dbi->client != NULL)
isc_mem_free(ns_g_mctx, dbi->client);
#ifdef ISC_PLATFORM_USETHREADS
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d unlocking mutex", dlz_thread_num);
#endif
/* release the lock so another thread can use this dbi */
isc_mutex_unlock(&dbi->instance_lock);
#endif /* ISC_PLATFORM_USETHREADS */
/* release query string */
if (querystring != NULL)
isc_mem_free(ns_g_mctx, querystring );
#if 0
/* temporary logging message */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"%d returning", dlz_thread_num);
#endif
/* return result */
return result;
}
static int
t_timers5(void) {
char *p;
int result;
isc_mem_t *mctx;
isc_taskmgr_t *tmgr;
unsigned int workers;
isc_result_t isc_result;
isc_timermgr_t *timermgr;
isc_event_t *event;
isc_time_t expires;
isc_interval_t interval;
T5_startflag = 0;
T5_shutdownflag = 0;
T5_eventcnt = 0;
workers = 2;
p = t_getenv("ISC_TASK_WORKERS");
if (p != NULL)
workers = atoi(p);
mctx = NULL;
isc_result = isc_mem_create(0, 0, &mctx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mem_create failed %s\n",
isc_result_totext(isc_result));
return(T_UNRESOLVED);
}
isc_result = isc_mutex_init(&T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_init failed %s\n",
isc_result_totext(isc_result));
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
isc_result = isc_condition_init(&T5_cv);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_condition_init failed %s\n",
isc_result_totext(isc_result));
DESTROYLOCK(&T5_mx);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
tmgr = NULL;
isc_result = isc_taskmgr_create(mctx, workers, 0, &tmgr);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_taskmgr_create failed %s\n",
isc_result_totext(isc_result));
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
timermgr = NULL;
isc_result = isc_timermgr_create(mctx, &timermgr);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_timermgr_create failed %s\n",
isc_result_totext(isc_result));
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
T5_task1 = NULL;
isc_result = isc_task_create(tmgr, 0, &T5_task1);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_task_create failed %s\n",
isc_result_totext(isc_result));
isc_timermgr_destroy(&timermgr);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
isc_result = isc_task_onshutdown(T5_task1, t5_shutdown_event, NULL);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_task_onshutdown failed %s\n",
isc_result_totext(isc_result));
isc_timermgr_destroy(&timermgr);
isc_task_destroy(&T5_task1);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
T5_task2 = NULL;
isc_result = isc_task_create(tmgr, 0, &T5_task2);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_task_create failed %s\n",
isc_result_totext(isc_result));
isc_timermgr_destroy(&timermgr);
isc_task_destroy(&T5_task1);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
isc_result = isc_mutex_lock(&T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_lock failed %s\n",
isc_result_totext(isc_result));
isc_timermgr_destroy(&timermgr);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
event = isc_event_allocate(mctx, (void *)1 , (isc_eventtype_t)1,
t5_start_event, NULL, sizeof(*event));
isc_task_send(T5_task1, &event);
isc_time_settoepoch(&expires);
isc_interval_set(&interval, T5_SECONDS, 0);
T5_tickertimer = NULL;
isc_result = isc_timer_create(timermgr, isc_timertype_ticker,
&expires, &interval, T5_task1,
t5_tick_event, NULL, &T5_tickertimer);
if (isc_result != ISC_R_SUCCESS) {
isc_timermgr_destroy(&timermgr);
(void) isc_condition_signal(&T5_cv);
(void) isc_mutex_unlock(&T5_mx);
isc_task_destroy(&T5_task1);
isc_task_destroy(&T5_task2);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
T5_oncetimer = NULL;
isc_interval_set(&interval, (T5_SECONDS * T5_NTICKS) + 2, 0);
isc_result = isc_time_nowplusinterval(&expires, &interval);
if (isc_result != ISC_R_SUCCESS) {
isc_timer_detach(&T5_tickertimer);
isc_timermgr_destroy(&timermgr);
(void)isc_condition_signal(&T5_cv);
(void)isc_mutex_unlock(&T5_mx);
isc_task_destroy(&T5_task1);
isc_task_destroy(&T5_task2);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
return(T_UNRESOLVED);
}
isc_interval_set(&interval, 0, 0);
isc_result = isc_timer_create(timermgr, isc_timertype_once,
&expires, &interval, T5_task2,
t5_once_event, NULL, &T5_oncetimer);
if (isc_result != ISC_R_SUCCESS) {
isc_timer_detach(&T5_tickertimer);
isc_timermgr_destroy(&timermgr);
(void) isc_condition_signal(&T5_cv);
(void) isc_mutex_unlock(&T5_mx);
isc_task_destroy(&T5_task1);
isc_task_destroy(&T5_task2);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
++T5_nprobs;
return(T_UNRESOLVED);
}
/*
* Wait for shutdown processing to complete.
*/
while (! T5_shutdownflag) {
isc_result = isc_condition_wait(&T5_cv, &T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_condition_waituntil failed %s\n",
isc_result_totext(isc_result));
++T5_nprobs;
}
}
isc_result = isc_mutex_unlock(&T5_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_unlock failed %s\n",
isc_result_totext(isc_result));
++T5_nprobs;
}
if (T5_eventcnt != 1) {
t_info("processed %d events\n", T5_eventcnt);
++T5_nfails;
}
isc_timer_detach(&T5_tickertimer);
isc_timer_detach(&T5_oncetimer);
isc_timermgr_destroy(&timermgr);
isc_task_destroy(&T5_task1);
isc_task_destroy(&T5_task2);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&T5_mx);
(void) isc_condition_destroy(&T5_cv);
isc_mem_destroy(&mctx);
result = T_UNRESOLVED;
if ((T5_nfails == 0) && (T5_nprobs == 0))
result = T_PASS;
else if (T5_nfails)
result = T_FAIL;
return (result);
}
static void
t_timers_x(isc_timertype_t timertype, isc_time_t *expires,
isc_interval_t *interval,
void (*action)(isc_task_t *, isc_event_t *))
{
char *p;
isc_mem_t *mctx;
isc_taskmgr_t *tmgr;
isc_task_t *task;
unsigned int workers;
isc_result_t isc_result;
isc_timermgr_t *timermgr;
Tx_eventcnt = 0;
isc_time_settoepoch(&Tx_endtime);
workers = 2;
p = t_getenv("ISC_TASK_WORKERS");
if (p != NULL)
workers = atoi(p);
mctx = NULL;
isc_result = isc_mem_create(0, 0, &mctx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mem_create failed %s\n",
isc_result_totext(isc_result));
++Tx_nprobs;
return;
}
isc_result = isc_mutex_init(&Tx_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_init failed %s\n",
isc_result_totext(isc_result));
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
isc_result = isc_condition_init(&Tx_cv);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_condition_init failed %s\n",
isc_result_totext(isc_result));
DESTROYLOCK(&Tx_mx);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
tmgr = NULL;
isc_result = isc_taskmgr_create(mctx, workers, 0, &tmgr);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_taskmgr_create failed %s\n",
isc_result_totext(isc_result));
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
timermgr = NULL;
isc_result = isc_timermgr_create(mctx, &timermgr);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_timermgr_create failed %s\n",
isc_result_totext(isc_result));
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
isc_result = isc_mutex_lock(&Tx_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_lock failed %s\n",
isc_result_totext(isc_result));
isc_timermgr_destroy(&timermgr);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
task = NULL;
isc_result = isc_task_create(tmgr, 0, &task);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_task_create failed %s\n",
isc_result_totext(isc_result));
isc_timermgr_destroy(&timermgr);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
isc_result = isc_task_onshutdown(task, tx_sde, NULL);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_task_onshutdown failed %s\n",
isc_result_totext(isc_result));
isc_timermgr_destroy(&timermgr);
isc_task_destroy(&task);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
isc_result = isc_time_now(&Tx_lasttime);
if (isc_result != ISC_R_SUCCESS) {
isc_timermgr_destroy(&timermgr);
isc_task_destroy(&task);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
Tx_timer = NULL;
isc_result = isc_timer_create(timermgr, timertype, expires, interval,
task, action, (void *)timertype,
&Tx_timer);
if (isc_result != ISC_R_SUCCESS) {
isc_timermgr_destroy(&timermgr);
isc_task_destroy(&task);
isc_taskmgr_destroy(&tmgr);
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
++Tx_nprobs;
return;
}
/*
* Wait for shutdown processing to complete.
*/
while (Tx_eventcnt != Tx_nevents) {
isc_result = isc_condition_wait(&Tx_cv, &Tx_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_condition_waituntil failed %s\n",
isc_result_totext(isc_result));
++Tx_nprobs;
}
}
isc_result = isc_mutex_unlock(&Tx_mx);
if (isc_result != ISC_R_SUCCESS) {
t_info("isc_mutex_unlock failed %s\n",
isc_result_totext(isc_result));
++Tx_nprobs;
}
isc_task_detach(&task);
isc_taskmgr_destroy(&tmgr);
isc_timermgr_destroy(&timermgr);
DESTROYLOCK(&Tx_mx);
(void) isc_condition_destroy(&Tx_cv);
isc_mem_destroy(&mctx);
}
static isc_result_t
odbc_process_rs(dns_sdlzlookup_t *lookup, dbinstance_t *dbi)
{
isc_result_t result;
SQLSMALLINT fields;
SQLHSTMT *stmnt;
char *ttl_s;
char *type;
char *data;
char *endp;
int ttl;
REQUIRE(dbi != NULL);
stmnt = ((odbc_db_t *) (dbi->dbconn))->stmnt;
/* get number of columns */
if (!sqlOK(SQLNumResultCols(stmnt, &fields))) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"Odbc driver unable to process result set");
result = ISC_R_FAILURE;
goto process_rs_cleanup;
}
/* get things ready for processing */
result = ISC_R_FAILURE;
while (sqlOK(SQLFetch(stmnt))) {
/* set to null for next pass through */
data = type = ttl_s = NULL;
switch(fields) {
case 1:
/*
* one column in rs, it's the data field. use
* default type of A record, and default TTL
* of 86400. attempt to get data, & tell bind
* about it.
*/
if ((result = odbc_getField(stmnt, 1,
&data)) == ISC_R_SUCCESS) {
result = dns_sdlz_putrr(lookup, "a",
86400, data);
}
break;
case 2:
/*
* two columns, data field, and data type.
* use default TTL of 86400. attempt to get
* DNS type & data, then tell bind about it.
*/
if ((result = odbc_getField(stmnt, 1,
&type)) == ISC_R_SUCCESS &&
(result = odbc_getField(stmnt, 2,
&data)) == ISC_R_SUCCESS) {
result = dns_sdlz_putrr(lookup, type,
86400, data);
}
break;
default:
/*
* 3 fields or more, concatenate the last ones
* together. attempt to get DNS ttl, type,
* data then tell Bind about them.
*/
if ((result = odbc_getField(stmnt, 1, &ttl_s))
== ISC_R_SUCCESS &&
(result = odbc_getField(stmnt, 2, &type))
== ISC_R_SUCCESS &&
(result = odbc_getManyFields(stmnt, 3,
fields, &data))
== ISC_R_SUCCESS) {
/* try to convert ttl string to int */
ttl = strtol(ttl_s, &endp, 10);
/* failure converting ttl. */
if (*endp != '\0' || ttl < 0) {
isc_log_write(dns_lctx,
DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ,
ISC_LOG_ERROR,
"Odbc driver ttl must "
"be a postive number");
result = ISC_R_FAILURE;
} else {
/*
* successful converting TTL,
* tell Bind everything
*/
result = dns_sdlz_putrr(lookup, type,
ttl, data);
}
} /* closes bid if () */
} /* closes switch(fields) */
/* clean up mem */
if (ttl_s != NULL)
isc_mem_free(ns_g_mctx, ttl_s);
if (type != NULL)
isc_mem_free(ns_g_mctx, type);
if (data != NULL)
isc_mem_free(ns_g_mctx, data);
/* I sure hope we were successful */
if (result != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"dns_sdlz_putrr returned error. "
"Error code was: %s",
isc_result_totext(result));
result = ISC_R_FAILURE;
goto process_rs_cleanup;
}
} /* closes while loop */
process_rs_cleanup:
/* close cursor */
SQLCloseCursor(((odbc_db_t *) (dbi->dbconn))->stmnt);
#ifdef ISC_PLATFORM_USETHREADS
/* free lock on dbi so someone else can use it. */
isc_mutex_unlock(&dbi->instance_lock);
#endif
return result;
}
static isc_result_t
odbc_get_resultset(const char *zone, const char *record,
const char *client, unsigned int query,
void *dbdata, dbinstance_t **r_dbi)
{
isc_result_t result;
dbinstance_t *dbi = NULL;
char *querystring = NULL;
unsigned int j = 0;
SQLRETURN sqlRes;
REQUIRE(*r_dbi == NULL);
/* get db instance / connection */
#ifdef ISC_PLATFORM_USETHREADS
/* find an available DBI from the list */
dbi = odbc_find_avail_conn(((odbc_instance_t *) dbdata)->db);
#else /* ISC_PLATFORM_USETHREADS */
/*
* only 1 DBI - no need to lock instance lock either
* only 1 thread in the whole process, no possible contention.
*/
dbi = (dbinstance_t *) ((odbc_instance_t *) dbdata)->db;
#endif /* ISC_PLATFORM_USETHREADS */
/* if DBI is null, can't do anything else */
if (dbi == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
/* what type of query are we going to run? */
switch(query) {
case ALLNODES:
/*
* if the query was not passed in from the config file
* then we can't run it. return not_implemented, so
* it's like the code for that operation was never
* built into the driver.... AHHH flexibility!!!
*/
if (dbi->allnodes_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
break;
case ALLOWXFR:
/* same as comments as ALLNODES */
if (dbi->allowxfr_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
break;
case AUTHORITY:
/* same as comments as ALLNODES */
if (dbi->authority_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
break;
case FINDZONE:
/* this is required. It's the whole point of DLZ! */
if (dbi->findzone_q == NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2),
"No query specified for findzone. "
"Findzone requires a query");
result = ISC_R_FAILURE;
goto cleanup;
}
break;
case LOOKUP:
/* this is required. It's also a major point of DLZ! */
if (dbi->lookup_q == NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2),
"No query specified for lookup. "
"Lookup requires a query");
result = ISC_R_FAILURE;
goto cleanup;
}
break;
default:
/*
* this should never happen. If it does, the code is
* screwed up!
*/
UNEXPECTED_ERROR(__FILE__, __LINE__,
"Incorrect query flag passed to "
"odbc_get_resultset");
result = ISC_R_UNEXPECTED;
goto cleanup;
}
/*
* was a zone string passed? If so, make it safe for use in
* queries.
*/
if (zone != NULL) {
dbi->zone = odbc_escape_string(zone);
if (dbi->zone == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else { /* no string passed, set the string pointer to NULL */
dbi->zone = NULL;
}
/*
* was a record string passed? If so, make it safe for use in
* queries.
*/
if (record != NULL) {
dbi->record = odbc_escape_string(record);
if (dbi->record == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else { /* no string passed, set the string pointer to NULL */
dbi->record = NULL;
}
/*
* was a client string passed? If so, make it safe for use in
* queries.
*/
if (client != NULL) {
dbi->client = odbc_escape_string(client);
if (dbi->client == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else { /* no string passed, set the string pointer to NULL */
dbi->client = NULL;
}
/*
* what type of query are we going to run?
* this time we build the actual query to run.
*/
switch(query) {
case ALLNODES:
querystring = build_querystring(ns_g_mctx, dbi->allnodes_q);
break;
case ALLOWXFR:
querystring = build_querystring(ns_g_mctx, dbi->allowxfr_q);
break;
case AUTHORITY:
querystring = build_querystring(ns_g_mctx, dbi->authority_q);
break;
case FINDZONE:
querystring = build_querystring(ns_g_mctx, dbi->findzone_q);
break;
case LOOKUP:
querystring = build_querystring(ns_g_mctx, dbi->lookup_q);
break;
default:
/*
* this should never happen. If it does, the code is
* screwed up!
*/
UNEXPECTED_ERROR(__FILE__, __LINE__,
"Incorrect query flag passed to "
"odbc_get_resultset");
result = ISC_R_UNEXPECTED;
goto cleanup;
}
/* if the querystring is null, Bummer, outta RAM. UPGRADE TIME!!! */
if (querystring == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
/* output the full query string during debug so we can see */
/* what lame error the query has. */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(1),
"\nQuery String: %s\n", querystring);
/* attempt query up to 3 times. */
for (j=0; j < 3; j++) {
/* try to get result set */
sqlRes = SQLExecDirect(((odbc_db_t *) dbi->dbconn)->stmnt,
(SQLCHAR *) querystring,
(SQLINTEGER) strlen(querystring));
/* if error, reset DB connection */
if (!sqlOK(sqlRes)) {
/* close cursor */
SQLCloseCursor(((odbc_db_t *) dbi->dbconn)->stmnt);
/* attempt to reconnect */
result = odbc_connect((odbc_instance_t *) dbdata,
(odbc_db_t **) &(dbi->dbconn));
/* check if we reconnected */
if (result != ISC_R_SUCCESS)
break;
/* incase this is the last time through the loop */
result = ISC_R_FAILURE;
} else {
result = ISC_R_SUCCESS;
/* return dbi */
*r_dbi = dbi;
/* result set ok, break loop */
break;
}
} /* end for loop */
cleanup: /* it's always good to cleanup after yourself */
/* if we couldn't even allocate DBI, just return NULL */
if (dbi == NULL)
return ISC_R_FAILURE;
/* free dbi->zone string */
if (dbi->zone != NULL)
isc_mem_free(ns_g_mctx, dbi->zone);
/* free dbi->record string */
if (dbi->record != NULL)
isc_mem_free(ns_g_mctx, dbi->record);
/* free dbi->client string */
if (dbi->client != NULL)
isc_mem_free(ns_g_mctx, dbi->client);
#ifdef ISC_PLATFORM_USETHREADS
/* if we are done using this dbi, release the lock */
if (result != ISC_R_SUCCESS)
isc_mutex_unlock(&dbi->instance_lock);
#endif /* ISC_PLATFORM_USETHREADS */
/* release query string */
if (querystring != NULL)
isc_mem_free(ns_g_mctx, querystring );
/* return result */
return result;
}
static isc_result_t
odbc_allnodes(const char *zone, void *driverarg, void *dbdata,
dns_sdlzallnodes_t *allnodes)
{
isc_result_t result;
dbinstance_t *dbi = NULL;
SQLHSTMT *stmnt;
SQLSMALLINT fields;
char *data;
char *type;
char *ttl_s;
int ttl;
char *host;
char *endp;
UNUSED(driverarg);
/* run the query and get the result set from the database. */
result = odbc_get_resultset(zone, NULL, NULL, ALLNODES, dbdata, &dbi);
/* if we get "not implemented", send it along */
if (result == ISC_R_NOTIMPLEMENTED)
return result;
/* if we didn't get a result set, log an err msg. */
if (result != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"Odbc driver unable to return "
"result set for all nodes query");
return (ISC_R_FAILURE);
}
stmnt = ((odbc_db_t *) (dbi->dbconn))->stmnt;
/* get number of columns */
if (!sqlOK(SQLNumResultCols(stmnt, &fields))) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"Odbc driver unable to process result set");
result = ISC_R_FAILURE;
goto allnodes_cleanup;
}
if (fields < 4) { /* gotta have at least 4 columns */
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"Odbc driver too few fields returned by "
"all nodes query");
result = ISC_R_FAILURE;
goto allnodes_cleanup;
}
/* get things ready for processing */
result = ISC_R_FAILURE;
while (sqlOK(SQLFetch(stmnt))) {
/* set to null for next pass through */
data = host = type = ttl_s = NULL;
/*
* attempt to get DNS ttl, type, host, data then tell
* Bind about them
*/
if ((result = odbc_getField(stmnt, 1,
&ttl_s)) == ISC_R_SUCCESS &&
(result = odbc_getField(stmnt, 2,
&type)) == ISC_R_SUCCESS &&
(result = odbc_getField(stmnt, 3,
&host)) == ISC_R_SUCCESS &&
(result = odbc_getManyFields(stmnt, 4, fields,
&data)) == ISC_R_SUCCESS) {
/* convert ttl string to int */
ttl = strtol(ttl_s, &endp, 10);
/* failure converting ttl. */
if (*endp != '\0' || ttl < 0) {
isc_log_write(dns_lctx,
DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"Odbc driver ttl must be "
"a postive number");
result = ISC_R_FAILURE;
} else {
/* successful converting TTL, tell Bind */
result = dns_sdlz_putnamedrr(allnodes, host,
type, ttl, data);
}
} /* closes big if () */
/* clean up mem */
if (ttl_s != NULL)
isc_mem_free(ns_g_mctx, ttl_s);
if (type != NULL)
isc_mem_free(ns_g_mctx, type);
if (host != NULL)
isc_mem_free(ns_g_mctx, host);
if (data != NULL)
isc_mem_free(ns_g_mctx, data);
/* if we weren't successful, log err msg */
if (result != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"dns_sdlz_putnamedrr returned error. "
"Error code was: %s",
isc_result_totext(result));
result = ISC_R_FAILURE;
goto allnodes_cleanup;
}
} /* closes while loop */
allnodes_cleanup:
/* close cursor */
SQLCloseCursor(((odbc_db_t *) (dbi->dbconn))->stmnt);
#ifdef ISC_PLATFORM_USETHREADS
/* free lock on dbi so someone else can use it. */
isc_mutex_unlock(&dbi->instance_lock);
#endif
return result;
}
/*%
* This function is the real core of the driver. Zone, record
* and client strings are passed in (or NULL is passed if the
* string is not available). The type of query we want to run
* is indicated by the query flag, and the dbdata object is passed
* passed in to. dbdata really holds either:
* 1) a list of database instances (in multithreaded mode) OR
* 2) a single database instance (in single threaded mode)
* The function will construct the query and obtain an available
* database instance (DBI). It will then run the query and hopefully
* obtain a result set.
*/
static isc_result_t
ldap_get_results(const char *zone, const char *record,
const char *client, unsigned int query,
void *dbdata, void *ptr)
{
isc_result_t result;
dbinstance_t *dbi = NULL;
char *querystring = NULL;
LDAPURLDesc *ldap_url = NULL;
int ldap_result = 0;
LDAPMessage *ldap_msg = NULL;
int i;
int entries;
/* get db instance / connection */
#ifdef ISC_PLATFORM_USETHREADS
/* find an available DBI from the list */
dbi = ldap_find_avail_conn((db_list_t *)
((ldap_instance_t *)dbdata)->db);
#else /* ISC_PLATFORM_USETHREADS */
/*
* only 1 DBI - no need to lock instance lock either
* only 1 thread in the whole process, no possible contention.
*/
dbi = (dbinstance_t *) ((ldap_instance_t *)dbdata)->db;
#endif /* ISC_PLATFORM_USETHREADS */
/* if DBI is null, can't do anything else */
if (dbi == NULL)
return (ISC_R_FAILURE);
/* set fields */
if (zone != NULL) {
dbi->zone = isc_mem_strdup(ns_g_mctx, zone);
if (dbi->zone == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else {
dbi->zone = NULL;
}
if (record != NULL) {
dbi->record = isc_mem_strdup(ns_g_mctx, record);
if (dbi->record == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else {
dbi->record = NULL;
}
if (client != NULL) {
dbi->client = isc_mem_strdup(ns_g_mctx, client);
if (dbi->client == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
} else {
dbi->client = NULL;
}
/* what type of query are we going to run? */
switch(query) {
case ALLNODES:
/*
* if the query was not passed in from the config file
* then we can't run it. return not_implemented, so
* it's like the code for that operation was never
* built into the driver.... AHHH flexibility!!!
*/
if (dbi->allnodes_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
} else {
querystring = build_querystring(ns_g_mctx,
dbi->allnodes_q);
}
break;
case ALLOWXFR:
/* same as comments as ALLNODES */
if (dbi->allowxfr_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
} else {
querystring = build_querystring(ns_g_mctx,
dbi->allowxfr_q);
}
break;
case AUTHORITY:
/* same as comments as ALLNODES */
if (dbi->authority_q == NULL) {
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
} else {
querystring = build_querystring(ns_g_mctx,
dbi->authority_q);
}
break;
case FINDZONE:
/* this is required. It's the whole point of DLZ! */
if (dbi->findzone_q == NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2),
"No query specified for findzone. "
"Findzone requires a query");
result = ISC_R_FAILURE;
goto cleanup;
} else {
querystring = build_querystring(ns_g_mctx,
dbi->findzone_q);
}
break;
case LOOKUP:
/* this is required. It's also a major point of DLZ! */
if (dbi->lookup_q == NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(2),
"No query specified for lookup. "
"Lookup requires a query");
result = ISC_R_FAILURE;
goto cleanup;
} else {
querystring = build_querystring(ns_g_mctx,
dbi->lookup_q);
}
break;
default:
/*
* this should never happen. If it does, the code is
* screwed up!
*/
UNEXPECTED_ERROR(__FILE__, __LINE__,
"Incorrect query flag passed to "
"ldap_get_results");
result = ISC_R_UNEXPECTED;
goto cleanup;
}
/* if the querystring is null, Bummer, outta RAM. UPGRADE TIME!!! */
if (querystring == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
/*
* output the full query string during debug so we can see
* what lame error the query has.
*/
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(1),
"\nQuery String: %s\n", querystring);
/* break URL down into it's component parts, if error cleanup */
ldap_result = ldap_url_parse(querystring, &ldap_url);
if (ldap_result != LDAP_SUCCESS || ldap_url == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
for (i = 0; i < 3; i++) {
/*
* dbi->dbconn may be null if trying to reconnect on a
* previous query failed.
*/
if (dbi->dbconn == NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_INFO,
"LDAP driver attempting to re-connect");
result = dlz_ldap_connect((ldap_instance_t *) dbdata,
dbi);
if (result != ISC_R_SUCCESS) {
result = ISC_R_FAILURE;
continue;
}
}
/* perform ldap search syncronously */
ldap_result = ldap_search_s((LDAP *) dbi->dbconn,
ldap_url->lud_dn,
ldap_url->lud_scope,
ldap_url->lud_filter,
ldap_url->lud_attrs, 0, &ldap_msg);
/*
* check return code. No such object is ok, just
* didn't find what we wanted
*/
switch(ldap_result) {
case LDAP_NO_SUCH_OBJECT:
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_DEBUG(1),
"No object found matching "
"query requirements");
result = ISC_R_NOTFOUND;
goto cleanup;
break;
case LDAP_SUCCESS: /* on success do nothing */
result = ISC_R_SUCCESS;
i = 3;
break;
case LDAP_SERVER_DOWN:
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_INFO,
"LDAP driver attempting to re-connect");
result = dlz_ldap_connect((ldap_instance_t *) dbdata,
dbi);
if (result != ISC_R_SUCCESS)
result = ISC_R_FAILURE;
break;
default:
/*
* other errors not ok. Log error message and
* get out
*/
isc_log_write(dns_lctx, DNS_LOGCATEGORY_DATABASE,
DNS_LOGMODULE_DLZ, ISC_LOG_ERROR,
"LDAP error: %s",
ldap_err2string(ldap_result));
result = ISC_R_FAILURE;
goto cleanup;
break;
} /* close switch(ldap_result) */
} /* end for (int i = 0 i < 3; i++) */
if (result != ISC_R_SUCCESS)
goto cleanup;
switch(query) {
case ALLNODES:
result = ldap_process_results((LDAP *) dbi->dbconn, ldap_msg,
ldap_url->lud_attrs,
ptr, isc_boolean_true);
break;
case AUTHORITY:
case LOOKUP:
result = ldap_process_results((LDAP *) dbi->dbconn, ldap_msg,
ldap_url->lud_attrs,
ptr, isc_boolean_false);
break;
case ALLOWXFR:
entries = ldap_count_entries((LDAP *) dbi->dbconn, ldap_msg);
if (entries == 0)
result = ISC_R_NOPERM;
else if (entries > 0)
result = ISC_R_SUCCESS;
else
result = ISC_R_FAILURE;
break;
case FINDZONE:
entries = ldap_count_entries((LDAP *) dbi->dbconn, ldap_msg);
if (entries == 0)
result = ISC_R_NOTFOUND;
else if (entries > 0)
result = ISC_R_SUCCESS;
else
result = ISC_R_FAILURE;
break;
default:
/*
* this should never happen. If it does, the code is
* screwed up!
*/
UNEXPECTED_ERROR(__FILE__, __LINE__,
"Incorrect query flag passed to "
"ldap_get_results");
result = ISC_R_UNEXPECTED;
}
cleanup:
/* it's always good to cleanup after yourself */
/* if we retrieved results, free them */
if (ldap_msg != NULL)
ldap_msgfree(ldap_msg);
if (ldap_url != NULL)
ldap_free_urldesc(ldap_url);
/* cleanup */
if (dbi->zone != NULL)
isc_mem_free(ns_g_mctx, dbi->zone);
if (dbi->record != NULL)
isc_mem_free(ns_g_mctx, dbi->record);
if (dbi->client != NULL)
isc_mem_free(ns_g_mctx, dbi->client);
#ifdef ISC_PLATFORM_USETHREADS
/* release the lock so another thread can use this dbi */
isc_mutex_unlock(&dbi->instance_lock);
#endif /* ISC_PLATFORM_USETHREADS */
/* release query string */
if (querystring != NULL)
isc_mem_free(ns_g_mctx, querystring );
/* return result */
return (result);
}