/*
* ldap_result - wait for an ldap result response to a message from the
* ldap server. If msgid is LDAP_RES_ANY (-1), any message will be
* accepted. If msgid is LDAP_RES_UNSOLICITED (0), any unsolicited
* message is accepted. Otherwise ldap_result will wait for a response
* with msgid. If all is LDAP_MSG_ONE (0) the first message with id
* msgid will be accepted, otherwise, ldap_result will wait for all
* responses with id msgid and then return a pointer to the entire list
* of messages. In general, this is only useful for search responses,
* which can be of three message types (zero or more entries, zero or
* search references, followed by an ldap result). An extension to
* LDAPv3 allows partial extended responses to be returned in response
* to any request. The type of the first message received is returned.
* When waiting, any messages that have been abandoned/discarded are
* discarded.
*
* Example:
* ldap_result( s, msgid, all, timeout, result )
*/
int
ldap_result(
LDAP *ld,
int msgid,
int all,
struct timeval *timeout,
LDAPMessage **result )
{
LDAPMessage *lm = NULL;
int rc;
assert( ld != NULL );
assert( result != NULL );
Debug( LDAP_DEBUG_TRACE, "ldap_result ld %p msgid %d\n", (void *)ld, msgid, 0 );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
#endif
#if 0
/* this is already done inside wait4msg(), right?... */
lm = chkResponseList( ld, msgid, all );
#endif
if ( lm == NULL ) {
rc = wait4msg( ld, msgid, all, timeout, result );
} else {
*result = lm;
ld->ld_errno = LDAP_SUCCESS;
rc = lm->lm_msgtype;
}
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
#endif
return rc;
}
static ber_tag_t
try_read1msg(
LDAP *ld,
ber_int_t msgid,
int all,
LDAPConn **lcp,
LDAPMessage **result )
{
BerElement *ber;
LDAPMessage *newmsg, *l, *prev;
ber_int_t id;
int idx;
ber_tag_t tag;
ber_len_t len;
int foundit = 0;
LDAPRequest *lr, *tmplr, dummy_lr = { 0 };
LDAPConn *lc;
BerElement tmpber;
int rc, refer_cnt, hadref, simple_request;
ber_int_t lderr;
#ifdef LDAP_CONNECTIONLESS
LDAPMessage *tmp = NULL, *chain_head = NULL;
int moremsgs = 0, isv2 = 0;
#endif
assert( ld != NULL );
assert( lcp != NULL );
assert( *lcp != NULL );
#ifdef LDAP_R_COMPILE
LDAP_PVT_THREAD_ASSERT_MUTEX_OWNER( &ld->ld_res_mutex );
#endif
Debug( LDAP_DEBUG_TRACE, "read1msg: ld %p msgid %d all %d\n",
(void *)ld, msgid, all );
lc = *lcp;
retry:
if ( lc->lconn_ber == NULL ) {
lc->lconn_ber = ldap_alloc_ber_with_options( ld );
if ( lc->lconn_ber == NULL ) {
return -1;
}
}
ber = lc->lconn_ber;
assert( LBER_VALID (ber) );
/* get the next message */
sock_errset(0);
#ifdef LDAP_CONNECTIONLESS
if ( LDAP_IS_UDP(ld) ) {
struct sockaddr from;
ber_int_sb_read( lc->lconn_sb, &from, sizeof(struct sockaddr) );
if ( ld->ld_options.ldo_version == LDAP_VERSION2 ) isv2 = 1;
}
nextresp3:
#endif
tag = ber_get_next( lc->lconn_sb, &len, ber );
switch ( tag ) {
case LDAP_TAG_MESSAGE:
/*
* We read a complete message.
* The connection should no longer need this ber.
*/
lc->lconn_ber = NULL;
break;
case LBER_DEFAULT:
#ifdef LDAP_DEBUG
Debug( LDAP_DEBUG_CONNS,
"ber_get_next failed.\n", 0, 0, 0 );
#endif
#ifdef EWOULDBLOCK
if ( sock_errno() == EWOULDBLOCK ) return LDAP_MSG_X_KEEP_LOOKING;
#endif
#ifdef EAGAIN
if ( sock_errno() == EAGAIN ) return LDAP_MSG_X_KEEP_LOOKING;
#endif
ld->ld_errno = LDAP_SERVER_DOWN;
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
#endif
ldap_free_connection( ld, lc, 1, 0 );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
#endif
lc = *lcp = NULL;
return -1;
default:
ld->ld_errno = LDAP_LOCAL_ERROR;
return -1;
}
/* message id */
if ( ber_get_int( ber, &id ) == LBER_ERROR ) {
ber_free( ber, 1 );
ld->ld_errno = LDAP_DECODING_ERROR;
return( -1 );
}
/* id == 0 iff unsolicited notification message (RFC 4511) */
/* if it's been abandoned, toss it */
if ( id > 0 ) {
if ( ldap_abandoned( ld, id, &idx ) ) {
/* the message type */
tag = ber_peek_tag( ber, &len );
switch ( tag ) {
case LDAP_RES_SEARCH_ENTRY:
case LDAP_RES_SEARCH_REFERENCE:
case LDAP_RES_INTERMEDIATE:
case LBER_ERROR:
break;
default:
/* there's no need to keep the id
* in the abandoned list any longer */
ldap_mark_abandoned( ld, id, idx );
break;
}
Debug( LDAP_DEBUG_ANY,
"abandoned/discarded ld %p msgid %ld message type %s\n",
(void *)ld, (long)id, ldap_int_msgtype2str( tag ) );
retry_ber:
ber_free( ber, 1 );
if ( ber_sockbuf_ctrl( lc->lconn_sb, LBER_SB_OPT_DATA_READY, NULL ) ) {
goto retry;
}
return( LDAP_MSG_X_KEEP_LOOKING ); /* continue looking */
}
lr = ldap_find_request_by_msgid( ld, id );
if ( lr == NULL ) {
const char *msg = "unknown";
/* the message type */
tag = ber_peek_tag( ber, &len );
switch ( tag ) {
case LBER_ERROR:
break;
default:
msg = ldap_int_msgtype2str( tag );
break;
}
Debug( LDAP_DEBUG_ANY,
"no request for response on ld %p msgid %ld message type %s (tossing)\n",
(void *)ld, (long)id, msg );
goto retry_ber;
}
#ifdef LDAP_CONNECTIONLESS
if ( LDAP_IS_UDP(ld) && isv2 ) {
ber_scanf(ber, "x{");
}
nextresp2:
#endif
}
/* the message type */
tag = ber_peek_tag( ber, &len );
if ( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return( -1 );
}
Debug( LDAP_DEBUG_TRACE,
"read1msg: ld %p msgid %ld message type %s\n",
(void *)ld, (long)lr->lr_msgid, ldap_int_msgtype2str( tag ) );
if ( id == 0 ) {
/* unsolicited notification message (RFC 4511) */
if ( tag != LDAP_RES_EXTENDED ) {
/* toss it */
goto retry_ber;
/* strictly speaking, it's an error; from RFC 4511:
4.4. Unsolicited Notification
An unsolicited notification is an LDAPMessage sent from the server to
the client that is not in response to any LDAPMessage received by the
server. It is used to signal an extraordinary condition in the
server or in the LDAP session between the client and the server. The
notification is of an advisory nature, and the server will not expect
any response to be returned from the client.
The unsolicited notification is structured as an LDAPMessage in which
the messageID is zero and protocolOp is set to the extendedResp
choice using the ExtendedResponse type (See Section 4.12). The
responseName field of the ExtendedResponse always contains an LDAPOID
that is unique for this notification.
* however, since unsolicited responses
* are of advisory nature, better
* toss it, right now
*/
#if 0
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return( -1 );
#endif
}
lr = &dummy_lr;
}
id = lr->lr_origid;
refer_cnt = 0;
hadref = simple_request = 0;
rc = LDAP_MSG_X_KEEP_LOOKING; /* default is to keep looking (no response found) */
lr->lr_res_msgtype = tag;
/*
* Check for V3 search reference
*/
if ( tag == LDAP_RES_SEARCH_REFERENCE ) {
if ( ld->ld_version > LDAP_VERSION2 ) {
/* This is a V3 search reference */
if ( LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS) ||
lr->lr_parent != NULL )
{
char **refs = NULL;
tmpber = *ber;
/* Get the referral list */
if ( ber_scanf( &tmpber, "{v}", &refs ) == LBER_ERROR ) {
rc = LDAP_DECODING_ERROR;
} else {
/* Note: refs array is freed by ldap_chase_v3referrals */
refer_cnt = ldap_chase_v3referrals( ld, lr, refs,
1, &lr->lr_res_error, &hadref );
if ( refer_cnt > 0 ) {
/* successfully chased reference */
/* If haven't got end search, set chasing referrals */
if ( lr->lr_status != LDAP_REQST_COMPLETED ) {
lr->lr_status = LDAP_REQST_CHASINGREFS;
Debug( LDAP_DEBUG_TRACE,
"read1msg: search ref chased, "
"mark request chasing refs, "
"id = %d\n",
lr->lr_msgid, 0, 0 );
}
}
}
}
}
} else if ( tag != LDAP_RES_SEARCH_ENTRY && tag != LDAP_RES_INTERMEDIATE ) {
/* All results that just return a status, i.e. don't return data
* go through the following code. This code also chases V2 referrals
* and checks if all referrals have been chased.
*/
char *lr_res_error = NULL;
tmpber = *ber; /* struct copy */
if ( ber_scanf( &tmpber, "{eAA", &lderr,
&lr->lr_res_matched, &lr_res_error )
!= LBER_ERROR )
{
if ( lr_res_error != NULL ) {
if ( lr->lr_res_error != NULL ) {
(void)ldap_append_referral( ld, &lr->lr_res_error, lr_res_error );
LDAP_FREE( (char *)lr_res_error );
} else {
lr->lr_res_error = lr_res_error;
}
lr_res_error = NULL;
}
/* Do we need to check for referrals? */
if ( LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS) ||
lr->lr_parent != NULL )
{
char **refs = NULL;
ber_len_t len;
/* Check if V3 referral */
if ( ber_peek_tag( &tmpber, &len ) == LDAP_TAG_REFERRAL ) {
if ( ld->ld_version > LDAP_VERSION2 ) {
/* Get the referral list */
if ( ber_scanf( &tmpber, "{v}", &refs) == LBER_ERROR) {
rc = LDAP_DECODING_ERROR;
lr->lr_status = LDAP_REQST_COMPLETED;
Debug( LDAP_DEBUG_TRACE,
"read1msg: referral decode error, "
"mark request completed, ld %p msgid %d\n",
(void *)ld, lr->lr_msgid, 0 );
} else {
/* Chase the referral
* refs array is freed by ldap_chase_v3referrals
*/
refer_cnt = ldap_chase_v3referrals( ld, lr, refs,
0, &lr->lr_res_error, &hadref );
lr->lr_status = LDAP_REQST_COMPLETED;
Debug( LDAP_DEBUG_TRACE,
"read1msg: referral %s chased, "
"mark request completed, ld %p msgid %d\n",
refer_cnt > 0 ? "" : "not",
(void *)ld, lr->lr_msgid);
if ( refer_cnt < 0 ) {
refer_cnt = 0;
}
}
}
} else {
switch ( lderr ) {
case LDAP_SUCCESS:
case LDAP_COMPARE_TRUE:
case LDAP_COMPARE_FALSE:
break;
default:
if ( lr->lr_res_error == NULL ) {
break;
}
/* pedantic, should never happen */
if ( lr->lr_res_error[ 0 ] == '\0' ) {
LDAP_FREE( lr->lr_res_error );
lr->lr_res_error = NULL;
break;
}
/* V2 referrals are in error string */
refer_cnt = ldap_chase_referrals( ld, lr,
&lr->lr_res_error, -1, &hadref );
lr->lr_status = LDAP_REQST_COMPLETED;
Debug( LDAP_DEBUG_TRACE,
"read1msg: V2 referral chased, "
"mark request completed, id = %d\n",
lr->lr_msgid, 0, 0 );
break;
}
}
}
/* save errno, message, and matched string */
if ( !hadref || lr->lr_res_error == NULL ) {
lr->lr_res_errno =
lderr == LDAP_PARTIAL_RESULTS
? LDAP_SUCCESS : lderr;
} else if ( ld->ld_errno != LDAP_SUCCESS ) {
lr->lr_res_errno = ld->ld_errno;
} else {
lr->lr_res_errno = LDAP_PARTIAL_RESULTS;
}
}
/* in any case, don't leave any lr_res_error 'round */
if ( lr_res_error ) {
LDAP_FREE( lr_res_error );
}
Debug( LDAP_DEBUG_TRACE,
"read1msg: ld %p %d new referrals\n",
(void *)ld, refer_cnt, 0 );
if ( refer_cnt != 0 ) { /* chasing referrals */
ber_free( ber, 1 );
ber = NULL;
if ( refer_cnt < 0 ) {
ldap_return_request( ld, lr, 0 );
return( -1 ); /* fatal error */
}
lr->lr_res_errno = LDAP_SUCCESS; /* sucessfully chased referral */
} else {
if ( lr->lr_outrefcnt <= 0 && lr->lr_parent == NULL ) {
/* request without any referrals */
simple_request = ( hadref ? 0 : 1 );
} else {
/* request with referrals or child request */
ber_free( ber, 1 );
ber = NULL;
}
lr->lr_status = LDAP_REQST_COMPLETED; /* declare this request done */
Debug( LDAP_DEBUG_TRACE,
"read1msg: mark request completed, ld %p msgid %d\n",
(void *)ld, lr->lr_msgid, 0);
while ( lr->lr_parent != NULL ) {
merge_error_info( ld, lr->lr_parent, lr );
lr = lr->lr_parent;
if ( --lr->lr_outrefcnt > 0 ) {
break; /* not completely done yet */
}
}
/* Check if all requests are finished, lr is now parent */
tmplr = lr;
if ( tmplr->lr_status == LDAP_REQST_COMPLETED ) {
for ( tmplr = lr->lr_child;
tmplr != NULL;
tmplr = tmplr->lr_refnext )
{
if ( tmplr->lr_status != LDAP_REQST_COMPLETED ) break;
}
}
/* This is the parent request if the request has referrals */
if ( lr->lr_outrefcnt <= 0 &&
lr->lr_parent == NULL &&
tmplr == NULL )
{
id = lr->lr_msgid;
tag = lr->lr_res_msgtype;
Debug( LDAP_DEBUG_TRACE, "request done: ld %p msgid %ld\n",
(void *)ld, (long) id, 0 );
Debug( LDAP_DEBUG_TRACE,
"res_errno: %d, res_error: <%s>, "
"res_matched: <%s>\n",
lr->lr_res_errno,
lr->lr_res_error ? lr->lr_res_error : "",
lr->lr_res_matched ? lr->lr_res_matched : "" );
if ( !simple_request ) {
ber_free( ber, 1 );
ber = NULL;
if ( build_result_ber( ld, &ber, lr )
== LBER_ERROR )
{
rc = -1; /* fatal error */
}
}
if ( lr != &dummy_lr ) {
ldap_return_request( ld, lr, 1 );
}
lr = NULL;
}
/*
* RF 4511 unsolicited (id == 0) responses
* shouldn't necessarily end the connection
*/
if ( lc != NULL && id != 0 ) {
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
#endif
ldap_free_connection( ld, lc, 0, 1 );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
#endif
lc = *lcp = NULL;
}
}
}
if ( lr != NULL ) {
if ( lr != &dummy_lr ) {
ldap_return_request( ld, lr, 0 );
}
lr = NULL;
}
if ( ber == NULL ) {
return( rc );
}
/* try to handle unsolicited responses as appropriate */
if ( id == 0 && msgid > LDAP_RES_UNSOLICITED ) {
int is_nod = 0;
tag = ber_peek_tag( &tmpber, &len );
/* we have a res oid */
if ( tag == LDAP_TAG_EXOP_RES_OID ) {
static struct berval bv_nod = BER_BVC( LDAP_NOTICE_OF_DISCONNECTION );
struct berval resoid = BER_BVNULL;
if ( ber_scanf( &tmpber, "m", &resoid ) == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return -1;
}
assert( !BER_BVISEMPTY( &resoid ) );
is_nod = ber_bvcmp( &resoid, &bv_nod ) == 0;
tag = ber_peek_tag( &tmpber, &len );
}
#if 0 /* don't need right now */
/* we have res data */
if ( tag == LDAP_TAG_EXOP_RES_VALUE ) {
struct berval resdata;
if ( ber_scanf( &tmpber, "m", &resdata ) == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 0 );
return ld->ld_errno;
}
/* use it... */
}
#endif
/* handle RFC 4511 "Notice of Disconnection" locally */
if ( is_nod ) {
if ( tag == LDAP_TAG_EXOP_RES_VALUE ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return -1;
}
/* get rid of the connection... */
if ( lc != NULL ) {
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
#endif
ldap_free_connection( ld, lc, 0, 1 );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
#endif
lc = *lcp = NULL;
}
/* need to return -1, because otherwise
* a valid result is expected */
return -1;
}
}
/* make a new ldap message */
newmsg = (LDAPMessage *) LDAP_CALLOC( 1, sizeof(LDAPMessage) );
if ( newmsg == NULL ) {
ld->ld_errno = LDAP_NO_MEMORY;
return( -1 );
}
newmsg->lm_msgid = (int)id;
newmsg->lm_msgtype = tag;
newmsg->lm_ber = ber;
newmsg->lm_chain_tail = newmsg;
#ifdef LDAP_CONNECTIONLESS
/* CLDAP replies all fit in a single datagram. In LDAPv2 RFC1798
* the responses are all a sequence wrapped in one message. In
* LDAPv3 each response is in its own message. The datagram must
* end with a SearchResult. We can't just parse each response in
* separate calls to try_read1msg because the header info is only
* present at the beginning of the datagram, not at the beginning
* of each response. So parse all the responses at once and queue
* them up, then pull off the first response to return to the
* caller when all parsing is complete.
*/
if ( LDAP_IS_UDP(ld) ) {
/* If not a result, look for more */
if ( tag != LDAP_RES_SEARCH_RESULT ) {
int ok = 0;
moremsgs = 1;
if (isv2) {
/* LDAPv2: dup the current ber, skip past the current
* response, and see if there are any more after it.
*/
ber = ber_dup( ber );
ber_scanf( ber, "x" );
if ( ber_peek_tag( ber, &len ) != LBER_DEFAULT ) {
/* There's more - dup the ber buffer so they can all be
* individually freed by ldap_msgfree.
*/
struct berval bv;
ber_get_option( ber, LBER_OPT_BER_REMAINING_BYTES, &len );
bv.bv_val = LDAP_MALLOC( len );
if ( bv.bv_val ) {
ok = 1;
ber_read( ber, bv.bv_val, len );
bv.bv_len = len;
ber_init2( ber, &bv, ld->ld_lberoptions );
}
}
} else {
/* LDAPv3: Just allocate a new ber. Since this is a buffered
* datagram, if the sockbuf is readable we still have data
* to parse.
*/
ber = ldap_alloc_ber_with_options( ld );
if ( ber_sockbuf_ctrl( lc->lconn_sb, LBER_SB_OPT_DATA_READY, NULL ) ) ok = 1;
}
/* set up response chain */
if ( tmp == NULL ) {
newmsg->lm_next = ld->ld_responses;
ld->ld_responses = newmsg;
chain_head = newmsg;
} else {
tmp->lm_chain = newmsg;
}
chain_head->lm_chain_tail = newmsg;
tmp = newmsg;
/* "ok" means there's more to parse */
if ( ok ) {
if ( isv2 ) {
goto nextresp2;
} else {
goto nextresp3;
}
} else {
/* got to end of datagram without a SearchResult. Free
* our dup'd ber, but leave any buffer alone. For v2 case,
* the previous response is still using this buffer. For v3,
* the new ber has no buffer to free yet.
*/
ber_free( ber, 0 );
return -1;
}
} else if ( moremsgs ) {
/* got search result, and we had multiple responses in 1 datagram.
* stick the result onto the end of the chain, and then pull the
* first response off the head of the chain.
*/
tmp->lm_chain = newmsg;
chain_head->lm_chain_tail = newmsg;
*result = chkResponseList( ld, msgid, all );
ld->ld_errno = LDAP_SUCCESS;
return( (*result)->lm_msgtype );
}
}
#endif /* LDAP_CONNECTIONLESS */
/* is this the one we're looking for? */
if ( msgid == LDAP_RES_ANY || id == msgid ) {
if ( all == LDAP_MSG_ONE
|| ( newmsg->lm_msgtype != LDAP_RES_SEARCH_RESULT
&& newmsg->lm_msgtype != LDAP_RES_SEARCH_ENTRY
&& newmsg->lm_msgtype != LDAP_RES_SEARCH_REFERENCE ) )
{
*result = newmsg;
ld->ld_errno = LDAP_SUCCESS;
return( tag );
} else if ( newmsg->lm_msgtype == LDAP_RES_SEARCH_RESULT) {
foundit = 1; /* return the chain later */
}
}
/*
* if not, we must add it to the list of responses. if
* the msgid is already there, it must be part of an existing
* search response.
*/
prev = NULL;
for ( l = ld->ld_responses; l != NULL; l = l->lm_next ) {
if ( l->lm_msgid == newmsg->lm_msgid ) {
break;
}
prev = l;
}
/* not part of an existing search response */
if ( l == NULL ) {
if ( foundit ) {
*result = newmsg;
goto exit;
}
newmsg->lm_next = ld->ld_responses;
ld->ld_responses = newmsg;
goto exit;
}
Debug( LDAP_DEBUG_TRACE, "adding response ld %p msgid %ld type %ld:\n",
(void *)ld, (long) newmsg->lm_msgid, (long) newmsg->lm_msgtype );
/* part of a search response - add to end of list of entries */
l->lm_chain_tail->lm_chain = newmsg;
l->lm_chain_tail = newmsg;
/* return the whole chain if that's what we were looking for */
if ( foundit ) {
if ( prev == NULL ) {
ld->ld_responses = l->lm_next;
} else {
prev->lm_next = l->lm_next;
}
*result = l;
}
exit:
if ( foundit ) {
ld->ld_errno = LDAP_SUCCESS;
return( tag );
}
if ( lc && ber_sockbuf_ctrl( lc->lconn_sb, LBER_SB_OPT_DATA_READY, NULL ) ) {
goto retry;
}
return( LDAP_MSG_X_KEEP_LOOKING ); /* continue looking */
}
static ber_tag_t
build_result_ber( LDAP *ld, BerElement **bp, LDAPRequest *lr )
{
ber_len_t len;
ber_tag_t tag;
ber_int_t along;
BerElement *ber;
*bp = NULL;
ber = ldap_alloc_ber_with_options( ld );
if( ber == NULL ) {
ld->ld_errno = LDAP_NO_MEMORY;
return LBER_ERROR;
}
if ( ber_printf( ber, "{it{ess}}", lr->lr_msgid,
lr->lr_res_msgtype, lr->lr_res_errno,
lr->lr_res_matched ? lr->lr_res_matched : "",
lr->lr_res_error ? lr->lr_res_error : "" ) == -1 )
{
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free( ber, 1 );
return( LBER_ERROR );
}
ber_reset( ber, 1 );
if ( ber_skip_tag( ber, &len ) == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return( LBER_ERROR );
}
if ( ber_get_enum( ber, &along ) == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return( LBER_ERROR );
}
tag = ber_peek_tag( ber, &len );
if ( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 1 );
return( LBER_ERROR );
}
*bp = ber;
return tag;
}
static int
wait4msg(
LDAP *ld,
ber_int_t msgid,
int all,
struct timeval *timeout,
LDAPMessage **result )
{
int rc;
struct timeval tv = { 0 },
tv0 = { 0 },
start_time_tv = { 0 },
*tvp = NULL;
LDAPConn *lc;
assert( ld != NULL );
assert( result != NULL );
#ifdef LDAP_R_COMPILE
LDAP_PVT_THREAD_ASSERT_MUTEX_OWNER( &ld->ld_res_mutex );
#endif
if ( timeout == NULL && ld->ld_options.ldo_tm_api.tv_sec >= 0 ) {
tv = ld->ld_options.ldo_tm_api;
timeout = &tv;
}
#ifdef LDAP_DEBUG
if ( timeout == NULL ) {
Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (infinite timeout)\n",
(void *)ld, msgid, 0 );
} else {
Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (timeout %ld usec)\n",
(void *)ld, msgid, (long)timeout->tv_sec * 1000000 + timeout->tv_usec );
}
#endif /* LDAP_DEBUG */
if ( timeout != NULL ) {
tv0 = *timeout;
tv = *timeout;
tvp = &tv;
#ifdef HAVE_GETTIMEOFDAY
gettimeofday( &start_time_tv, NULL );
#else /* ! HAVE_GETTIMEOFDAY */
time( &start_time_tv.tv_sec );
start_time_tv.tv_usec = 0;
#endif /* ! HAVE_GETTIMEOFDAY */
}
rc = LDAP_MSG_X_KEEP_LOOKING;
while ( rc == LDAP_MSG_X_KEEP_LOOKING ) {
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_TRACE ) {
Debug( LDAP_DEBUG_TRACE, "wait4msg continue ld %p msgid %d all %d\n",
(void *)ld, msgid, all );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
#endif
ldap_dump_connection( ld, ld->ld_conns, 1 );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
#endif
ldap_dump_requests_and_responses( ld );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
#endif
}
#endif /* LDAP_DEBUG */
if ( ( *result = chkResponseList( ld, msgid, all ) ) != NULL ) {
rc = (*result)->lm_msgtype;
} else {
int lc_ready = 0;
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
#endif
for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
if ( ber_sockbuf_ctrl( lc->lconn_sb,
LBER_SB_OPT_DATA_READY, NULL ) )
{
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
#endif
rc = try_read1msg( ld, msgid, all, &lc, result );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
#endif
lc_ready = 1;
break;
}
}
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
#endif
if ( !lc_ready ) {
rc = ldap_int_select( ld, tvp );
#ifdef LDAP_DEBUG
if ( rc == -1 ) {
Debug( LDAP_DEBUG_TRACE,
"ldap_int_select returned -1: errno %d\n",
sock_errno(), 0, 0 );
}
#endif
if ( rc == 0 || ( rc == -1 && (
!LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART)
|| sock_errno() != EINTR ) ) )
{
ld->ld_errno = (rc == -1 ? LDAP_SERVER_DOWN :
LDAP_TIMEOUT);
return( rc );
}
if ( rc == -1 ) {
rc = LDAP_MSG_X_KEEP_LOOKING; /* select interrupted: loop */
} else {
rc = LDAP_MSG_X_KEEP_LOOKING;
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
#endif
if ( ld->ld_requests &&
ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
ldap_is_write_ready( ld,
ld->ld_requests->lr_conn->lconn_sb ) )
{
ldap_int_flush_request( ld, ld->ld_requests );
}
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
#endif
for ( lc = ld->ld_conns;
rc == LDAP_MSG_X_KEEP_LOOKING && lc != NULL; )
{
if ( lc->lconn_status == LDAP_CONNST_CONNECTED &&
ldap_is_read_ready( ld, lc->lconn_sb ) )
{
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
#endif
rc = try_read1msg( ld, msgid, all, &lc, result );
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
#endif
if ( lc == NULL ) {
/* if lc gets free()'d,
* there's no guarantee
* lc->lconn_next is still
* sane; better restart
* (ITS#4405) */
lc = ld->ld_conns;
/* don't get to next conn! */
break;
}
}
/* next conn */
lc = lc->lconn_next;
}
#ifdef LDAP_R_COMPILE
ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
#endif
}
}
}
if ( rc == LDAP_MSG_X_KEEP_LOOKING && tvp != NULL ) {
struct timeval curr_time_tv = { 0 },
delta_time_tv = { 0 };
#ifdef HAVE_GETTIMEOFDAY
gettimeofday( &curr_time_tv, NULL );
#else /* ! HAVE_GETTIMEOFDAY */
time( &curr_time_tv.tv_sec );
curr_time_tv.tv_usec = 0;
#endif /* ! HAVE_GETTIMEOFDAY */
/* delta_time = tmp_time - start_time */
delta_time_tv.tv_sec = curr_time_tv.tv_sec - start_time_tv.tv_sec;
delta_time_tv.tv_usec = curr_time_tv.tv_usec - start_time_tv.tv_usec;
if ( delta_time_tv.tv_usec < 0 ) {
delta_time_tv.tv_sec--;
delta_time_tv.tv_usec += 1000000;
}
/* tv0 < delta_time ? */
if ( ( tv0.tv_sec < delta_time_tv.tv_sec ) ||
( ( tv0.tv_sec == delta_time_tv.tv_sec ) && ( tv0.tv_usec < delta_time_tv.tv_usec ) ) )
{
rc = 0; /* timed out */
ld->ld_errno = LDAP_TIMEOUT;
break;
}
/* tv0 -= delta_time */
tv0.tv_sec -= delta_time_tv.tv_sec;
tv0.tv_usec -= delta_time_tv.tv_usec;
if ( tv0.tv_usec < 0 ) {
tv0.tv_sec--;
tv0.tv_usec += 1000000;
}
tv.tv_sec = tv0.tv_sec;
tv.tv_usec = tv0.tv_usec;
Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p %ld s %ld us to go\n",
(void *)ld, (long) tv.tv_sec, (long) tv.tv_usec );
start_time_tv.tv_sec = curr_time_tv.tv_sec;
start_time_tv.tv_usec = curr_time_tv.tv_usec;
}
}
return( rc );
}
/* protected by res_mutex */
static int
wait4msg(
LDAP *ld,
ber_int_t msgid,
int all,
struct timeval *timeout,
LDAPMessage **result )
{
int rc;
struct timeval tv = { 0 },
tv0 = { 0 },
start_time_tv = { 0 },
*tvp = NULL;
LDAPConn *lc;
assert( ld != NULL );
assert( result != NULL );
LDAP_ASSERT_MUTEX_OWNER( &ld->ld_res_mutex );
if ( timeout == NULL && ld->ld_options.ldo_tm_api.tv_sec >= 0 ) {
tv = ld->ld_options.ldo_tm_api;
timeout = &tv;
}
#ifdef LDAP_DEBUG
if ( timeout == NULL ) {
Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (infinite timeout)\n",
(void *)ld, msgid, 0 );
} else {
Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (timeout %ld usec)\n",
(void *)ld, msgid, (long)timeout->tv_sec * 1000000 + timeout->tv_usec );
}
#endif /* LDAP_DEBUG */
if ( timeout != NULL && timeout->tv_sec != -1 ) {
tv0 = *timeout;
tv = *timeout;
tvp = &tv;
#ifdef HAVE_GETTIMEOFDAY
gettimeofday( &start_time_tv, NULL );
#else /* ! HAVE_GETTIMEOFDAY */
start_time_tv.tv_sec = time( NULL );
start_time_tv.tv_usec = 0;
#endif /* ! HAVE_GETTIMEOFDAY */
}
rc = LDAP_MSG_X_KEEP_LOOKING;
while ( rc == LDAP_MSG_X_KEEP_LOOKING ) {
#ifdef LDAP_DEBUG
if ( ldap_debug & LDAP_DEBUG_TRACE ) {
Debug( LDAP_DEBUG_TRACE, "wait4msg continue ld %p msgid %d all %d\n",
(void *)ld, msgid, all );
ldap_dump_connection( ld, ld->ld_conns, 1 );
LDAP_MUTEX_LOCK( &ld->ld_req_mutex );
ldap_dump_requests_and_responses( ld );
LDAP_MUTEX_UNLOCK( &ld->ld_req_mutex );
}
#endif /* LDAP_DEBUG */
if ( ( *result = chkResponseList( ld, msgid, all ) ) != NULL ) {
rc = (*result)->lm_msgtype;
} else {
int lc_ready = 0;
LDAP_MUTEX_LOCK( &ld->ld_conn_mutex );
for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
if ( ber_sockbuf_ctrl( lc->lconn_sb,
LBER_SB_OPT_DATA_READY, NULL ) )
{
lc_ready = 2; /* ready at ber level, not socket level */
break;
}
}
if ( !lc_ready ) {
int err;
rc = ldap_int_select( ld, tvp );
if ( rc == -1 ) {
err = sock_errno();
#ifdef LDAP_DEBUG
Debug( LDAP_DEBUG_TRACE,
"ldap_int_select returned -1: errno %d\n",
err, 0, 0 );
#endif
}
if ( rc == 0 || ( rc == -1 && (
!LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART)
|| err != EINTR ) ) )
{
ld->ld_errno = (rc == -1 ? LDAP_SERVER_DOWN :
LDAP_TIMEOUT);
LDAP_MUTEX_UNLOCK( &ld->ld_conn_mutex );
return( rc );
}
if ( rc == -1 ) {
rc = LDAP_MSG_X_KEEP_LOOKING; /* select interrupted: loop */
} else {
lc_ready = 1;
}
}
if ( lc_ready ) {
LDAPConn *lnext;
int serviced = 0;
rc = LDAP_MSG_X_KEEP_LOOKING;
LDAP_MUTEX_LOCK( &ld->ld_req_mutex );
if ( ld->ld_requests &&
ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
ldap_is_write_ready( ld,
ld->ld_requests->lr_conn->lconn_sb ) )
{
serviced = 1;
ldap_int_flush_request( ld, ld->ld_requests );
}
for ( lc = ld->ld_conns;
rc == LDAP_MSG_X_KEEP_LOOKING && lc != NULL;
lc = lnext )
{
if ( lc->lconn_status == LDAP_CONNST_CONNECTED &&
ldap_is_read_ready( ld, lc->lconn_sb ) )
{
serviced = 1;
/* Don't let it get freed out from under us */
++lc->lconn_refcnt;
rc = try_read1msg( ld, msgid, all, lc, result );
lnext = lc->lconn_next;
/* Only take locks if we're really freeing */
if ( lc->lconn_refcnt <= 1 ) {
ldap_free_connection( ld, lc, 0, 1 );
} else {
--lc->lconn_refcnt;
}
} else {
lnext = lc->lconn_next;
}
}
LDAP_MUTEX_UNLOCK( &ld->ld_req_mutex );
/* Quit looping if no one handled any socket events */
if (!serviced && lc_ready == 1)
rc = -1;
}
LDAP_MUTEX_UNLOCK( &ld->ld_conn_mutex );
}
if ( rc == LDAP_MSG_X_KEEP_LOOKING && tvp != NULL ) {
struct timeval curr_time_tv = { 0 },
delta_time_tv = { 0 };
#ifdef HAVE_GETTIMEOFDAY
gettimeofday( &curr_time_tv, NULL );
#else /* ! HAVE_GETTIMEOFDAY */
curr_time_tv.tv_sec = time( NULL );
curr_time_tv.tv_usec = 0;
#endif /* ! HAVE_GETTIMEOFDAY */
/* delta_time = tmp_time - start_time */
delta_time_tv.tv_sec = curr_time_tv.tv_sec - start_time_tv.tv_sec;
delta_time_tv.tv_usec = curr_time_tv.tv_usec - start_time_tv.tv_usec;
if ( delta_time_tv.tv_usec < 0 ) {
delta_time_tv.tv_sec--;
delta_time_tv.tv_usec += 1000000;
}
/* tv0 < delta_time ? */
if ( ( tv0.tv_sec < delta_time_tv.tv_sec ) ||
( ( tv0.tv_sec == delta_time_tv.tv_sec ) && ( tv0.tv_usec < delta_time_tv.tv_usec ) ) )
{
rc = 0; /* timed out */
ld->ld_errno = LDAP_TIMEOUT;
break;
}
/* tv0 -= delta_time */
tv0.tv_sec -= delta_time_tv.tv_sec;
tv0.tv_usec -= delta_time_tv.tv_usec;
if ( tv0.tv_usec < 0 ) {
tv0.tv_sec--;
tv0.tv_usec += 1000000;
}
tv.tv_sec = tv0.tv_sec;
tv.tv_usec = tv0.tv_usec;
Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p %ld s %ld us to go\n",
(void *)ld, (long) tv.tv_sec, (long) tv.tv_usec );
start_time_tv.tv_sec = curr_time_tv.tv_sec;
start_time_tv.tv_usec = curr_time_tv.tv_usec;
}
}
return( rc );
}
