1 files changed, 303 insertions, 0 deletions
diff --git a/ldap/c-sdk/libraries/libldap/abandon.c b/ldap/c-sdk/libraries/libldap/abandon.c
new file mode 100644
index 000000000..a514cfd89
--- /dev/null
+++ b/ldap/c-sdk/libraries/libldap/abandon.c
@@ -0,0 +1,303 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ * 
+ * The contents of this file are subject to the Mozilla Public License Version 
+ * 1.1 (the "License"); you may not use this file except in compliance with 
+ * the License. You may obtain a copy of the License at 
+ * http://www.mozilla.org/MPL/
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ * 
+ * The Original Code is Mozilla Communicator client code, released
+ * March 31, 1998.
+ * 
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998-1999
+ * the Initial Developer. All Rights Reserved.
+ * 
+ * Contributor(s):
+ * 
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ * 
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+ *  Copyright (c) 1990 Regents of the University of Michigan.
+ *  All rights reserved.
+ */
+/*
+ *  abandon.c
+ */
+
+#if 0
+#ifndef lint 
+static char copyright[] = "@(#) Copyright (c) 1990 Regents of the University of Michigan.\nAll rights reserved.\n";
+#endif
+#endif
+
+#include "ldap-int.h"
+
+static int do_abandon( LDAP *ld, int origid, int msgid,
+    LDAPControl **serverctrls, LDAPControl **clientctrls );
+static int nsldapi_send_abandon_message( LDAP *ld, LDAPConn *lc, 
+    BerElement *ber, int abandon_msgid );
+
+/*
+ * ldap_abandon - perform an ldap abandon operation. Parameters:
+ *
+ *	ld		LDAP descriptor
+ *	msgid		The message id of the operation to abandon
+ *
+ * ldap_abandon returns 0 if everything went ok, -1 otherwise.
+ *
+ * Example:
+ *	ldap_abandon( ld, msgid );
+ */
+int
+LDAP_CALL
+ldap_abandon( LDAP *ld, int msgid )
+{
+	LDAPDebug( LDAP_DEBUG_TRACE, "ldap_abandon %d\n", msgid, 0, 0 );
+	LDAPDebug( LDAP_DEBUG_TRACE, "4e65747363617065\n", msgid, 0, 0 );
+	LDAPDebug( LDAP_DEBUG_TRACE, "466f726576657221\n", msgid, 0, 0 );
+
+	if ( ldap_abandon_ext( ld, msgid, NULL, NULL ) == LDAP_SUCCESS ) {
+	    return( 0 );
+	}
+
+	return( -1 );
+}
+
+
+/*
+ * LDAPv3 extended abandon.
+ * Returns an LDAP error code.
+ */
+int
+LDAP_CALL
+ldap_abandon_ext( LDAP *ld, int msgid, LDAPControl **serverctrls,
+	LDAPControl **clientctrls )
+{
+	int	rc;
+
+	LDAPDebug( LDAP_DEBUG_TRACE, "ldap_abandon_ext %d\n", msgid, 0, 0 );
+
+	if ( !NSLDAPI_VALID_LDAP_POINTER( ld )) {
+		return( LDAP_PARAM_ERROR );
+	}
+
+	LDAP_MUTEX_LOCK( ld, LDAP_CONN_LOCK );
+	LDAP_MUTEX_LOCK( ld, LDAP_REQ_LOCK );
+	rc = do_abandon( ld, msgid, msgid, serverctrls, clientctrls );
+
+	/*
+	 * XXXmcs should use cache function pointers to hook in memcache
+	 */
+	ldap_memcache_abandon( ld, msgid );
+
+	LDAP_MUTEX_UNLOCK( ld, LDAP_REQ_LOCK );
+	LDAP_MUTEX_UNLOCK( ld, LDAP_CONN_LOCK );
+
+	return( rc );
+}
+
+
+/*
+ * Abandon all outstanding requests for msgid (included child requests
+ * spawned when chasing referrals).  This function calls itself recursively.
+ * No locking is done is this function so it must be done by the caller.
+ * Returns an LDAP error code and sets it in LDAP *ld as well
+ */
+static int
+do_abandon( LDAP *ld, int origid, int msgid, LDAPControl **serverctrls,
+    LDAPControl **clientctrls )
+{
+	BerElement	*ber;
+	int		i, bererr, lderr, sendabandon;
+	LDAPRequest	*lr = NULL;
+
+	/*
+	 * An abandon request looks like this:
+	 *	AbandonRequest ::= MessageID
+	 */
+	LDAPDebug( LDAP_DEBUG_TRACE, "do_abandon origid %d, msgid %d\n",
+		origid, msgid, 0 );
+
+	/* optimistic */
+	lderr = LDAP_SUCCESS;	
+
+        /*
+	 * Find the request that we are abandoning.  Don't send an
+	 * abandon message unless there is something to abandon.
+	 */
+        sendabandon = 0;
+	for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
+		if ( lr->lr_msgid == msgid ) {	/* this message */
+			if ( origid == msgid && lr->lr_parent != NULL ) {
+				/* don't let caller abandon child requests! */
+				lderr = LDAP_PARAM_ERROR;
+				goto set_errorcode_and_return;
+			}
+			if ( lr->lr_status == LDAP_REQST_INPROGRESS ) {
+			 	/*
+				 * We only need to send an abandon message if
+				 * the request is in progress.
+				 */
+			    sendabandon = 1;
+			}
+			break;
+		}
+		if ( lr->lr_origid == msgid ) {	/* child:  abandon it */
+			(void)do_abandon( ld, msgid, lr->lr_msgid,
+			      serverctrls, clientctrls );
+			/* we ignore errors from child abandons... */
+		}
+	}
+
+	if ( ldap_msgdelete( ld, msgid ) == 0 ) {
+		/* we had all the results and deleted them */
+		goto set_errorcode_and_return;
+	}
+
+	if ( lr != NULL && sendabandon ) {
+		/* create a message to send */
+		if (( lderr = nsldapi_alloc_ber_with_options( ld, &ber )) ==
+		    LDAP_SUCCESS ) {
+			int	abandon_msgid;
+
+			LDAP_MUTEX_LOCK( ld, LDAP_MSGID_LOCK );
+			abandon_msgid = ++ld->ld_msgid;
+			LDAP_MUTEX_UNLOCK( ld, LDAP_MSGID_LOCK );
+#ifdef CLDAP
+			if ( ld->ld_dbp->sb_naddr > 0 ) {
+				bererr = ber_printf( ber, "{isti",
+				    abandon_msgid, ld->ld_cldapdn,
+				    LDAP_REQ_ABANDON, msgid );
+			} else {
+#endif /* CLDAP */
+				bererr = ber_printf( ber, "{iti",
+				    abandon_msgid, LDAP_REQ_ABANDON, msgid );
+#ifdef CLDAP
+			}
+#endif /* CLDAP */
+
+			if ( bererr == -1 ||
+			    ( lderr = nsldapi_put_controls( ld, serverctrls,
+			    1, ber )) != LDAP_SUCCESS ) {
+				lderr = LDAP_ENCODING_ERROR;
+				ber_free( ber, 1 );
+			} else {
+				/* try to send the message */
+				lderr = nsldapi_send_abandon_message( ld,
+				    lr->lr_conn, ber, abandon_msgid );
+			}
+		}
+	}
+
+	if ( lr != NULL ) {
+		/*
+		 * Always call nsldapi_free_connection() so that the connection's
+		 * ref count is correctly decremented.  It is OK to always pass
+		 * 1 for the "unbind" parameter because doing so will only affect
+		 * connections that resulted from a child request (because the
+		 * default connection's ref count never goes to zero).
+		 */
+		nsldapi_free_connection( ld, lr->lr_conn, NULL, NULL,
+			0 /* do not force */, 1 /* send unbind before closing */ );
+
+		/*
+		 * Free the entire request chain if we finished abandoning everything.
+		 */
+		if ( origid == msgid ) {
+			nsldapi_free_request( ld, lr, 0 );
+		}
+	}
+
+	/*
+	 * Record the abandoned message ID (used to discard any server responses
+	 * that arrive later).
+	 */
+	LDAP_MUTEX_LOCK( ld, LDAP_ABANDON_LOCK );
+	if ( ld->ld_abandoned == NULL ) {
+		if ( (ld->ld_abandoned = (int *)NSLDAPI_MALLOC( 2
+		    * sizeof(int) )) == NULL ) {
+			lderr = LDAP_NO_MEMORY;
+			LDAP_MUTEX_UNLOCK( ld, LDAP_ABANDON_LOCK );
+			goto set_errorcode_and_return;
+		}
+		i = 0;
+	} else {
+		for ( i = 0; ld->ld_abandoned[i] != -1; i++ )
+			;	/* NULL */
+		if ( (ld->ld_abandoned = (int *)NSLDAPI_REALLOC( (char *)
+		    ld->ld_abandoned, (i + 2) * sizeof(int) )) == NULL ) {
+			lderr = LDAP_NO_MEMORY;
+			LDAP_MUTEX_UNLOCK( ld, LDAP_ABANDON_LOCK );
+			goto set_errorcode_and_return;
+		}
+	}
+	ld->ld_abandoned[i] = msgid;
+	ld->ld_abandoned[i + 1] = -1;
+	LDAP_MUTEX_UNLOCK( ld, LDAP_ABANDON_LOCK );
+
+set_errorcode_and_return:
+	LDAP_SET_LDERRNO( ld, lderr, NULL, NULL );
+	return( lderr );
+}
+
+/*
+ * Try to send the abandon message that is encoded in ber.  Returns an
+ * LDAP result code.
+ */
+static int
+nsldapi_send_abandon_message( LDAP *ld, LDAPConn *lc, BerElement *ber,
+    int abandon_msgid )
+{
+	int	lderr = LDAP_SUCCESS;
+	int	err = 0;
+
+	err = nsldapi_send_ber_message( ld, lc->lconn_sb,
+	    ber, 1 /* free ber */, 0 /* will not handle EPIPE */ );
+	if ( err == -2 ) {
+		/*
+		 * "Would block" error.  Queue the abandon as
+		 * a pending request.
+		 */
+		LDAPRequest	*lr;
+
+		lr = nsldapi_new_request( lc, ber, abandon_msgid,
+		    0 /* no response expected */ );
+		if ( lr == NULL ) {
+			lderr = LDAP_NO_MEMORY;
+			ber_free( ber, 1 );
+		} else {
+			lr->lr_status = LDAP_REQST_WRITING;
+			nsldapi_queue_request_nolock( ld, lr );
+			++lc->lconn_pending_requests;
+			nsldapi_iostatus_interest_write( ld,
+			    lc->lconn_sb );
+		}
+	} else if ( err != 0 ) {
+		/*
+		 * Fatal error (not a "would block" error).
+		 */
+		lderr = LDAP_SERVER_DOWN;
+		ber_free( ber, 1 );
+	}
+
+	return( lderr );
+}