af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder/* Licensed to the Apache Software Foundation (ASF) under one or more
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * contributor license agreements. See the NOTICE file distributed with
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * this work for additional information regarding copyright ownership.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * The ASF licenses this file to You under the Apache License, Version 2.0
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * (the "License"); you may not use this file except in compliance with
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * the License. You may obtain a copy of the License at
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * http://www.apache.org/licenses/LICENSE-2.0
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * Unless required by applicable law or agreed to in writing, software
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * distributed under the License is distributed on an "AS IS" BASIS,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * See the License for the specific language governing permissions and
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * limitations under the License.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/*
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * Generic DAV lock implementation that a DAV provider can use.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "apr.h"
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "apr_strings.h"
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "apr_file_io.h"
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "apr_uuid.h"
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define APR_WANT_MEMFUNC
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "apr_want.h"
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "httpd.h"
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "http_log.h"
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
96de7ec4008f75574077816c4c71a22e6afe1e01Christian Maeder#include "mod_dav.h"
96de7ec4008f75574077816c4c71a22e6afe1e01Christian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#include "locks.h"
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/* ---------------------------------------------------------------
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * Lock database primitives
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/*
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * LOCK DATABASES
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * Lockdiscovery information is stored in the single lock database specified
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * by the DAVGenericLockDB directive. Information about this db is stored in
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * the per-dir configuration.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * KEY
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * The database is keyed by a key_type unsigned char (DAV_TYPE_FNAME)
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * followed by full path.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder * VALUE
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * The value consists of a list of elements.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * DIRECT LOCK: [char (DAV_LOCK_DIRECT),
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * char (dav_lock_scope),
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * char (dav_lock_type),
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * int depth,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * time_t expires,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * apr_uuid_t locktoken,
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * char[] owner,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * char[] auth_user]
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * INDIRECT LOCK: [char (DAV_LOCK_INDIRECT),
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * apr_uuid_t locktoken,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * time_t expires,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * int key_size,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * char[] key]
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * The key is to the collection lock that resulted in this indirect lock
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define DAV_TRUE 1
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define DAV_FALSE 0
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define DAV_CREATE_LIST 23
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define DAV_APPEND_LIST 24
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/* Stored lock_discovery prefix */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define DAV_LOCK_DIRECT 1
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define DAV_LOCK_INDIRECT 2
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define DAV_TYPE_FNAME 11
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/* Use the opaquelock scheme for locktokens */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maederstruct dav_locktoken {
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder apr_uuid_t uuid;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder};
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define dav_compare_locktoken(plt1, plt2) \
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder memcmp(&(plt1)->uuid, &(plt2)->uuid, sizeof((plt1)->uuid))
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/* #################################################################
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * ### keep these structures (internal) or move fully to dav_lock?
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/*
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * We need to reliably size the fixed-length portion of
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * dav_lock_discovery; best to separate it into another
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * struct for a convenient sizeof, unless we pack lock_discovery.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maedertypedef struct dav_lock_discovery_fixed
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder{
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder char scope;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder char type;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder int depth;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder time_t timeout;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder} dav_lock_discovery_fixed;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maedertypedef struct dav_lock_discovery
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder{
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder struct dav_lock_discovery_fixed f;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder dav_locktoken *locktoken;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder const char *owner; /* owner field from activelock */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder const char *auth_user; /* authenticated user who created the lock */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder struct dav_lock_discovery *next;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder} dav_lock_discovery;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/* Indirect locks represent locks inherited from containing collections.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * They reference the lock token for the collection the lock is
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * inherited from. A lock provider may also define a key to the
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * inherited lock, for fast datbase lookup. The key is opaque outside
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * the lock provider.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maedertypedef struct dav_lock_indirect
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder{
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder dav_locktoken *locktoken;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder apr_datum_t key;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder struct dav_lock_indirect *next;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder time_t timeout;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder} dav_lock_indirect;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/* ################################################################# */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/*
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * Stored direct lock info - full lock_discovery length:
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * prefix + Fixed length + lock token + 2 strings + 2 nulls (one for each
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * string)
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define dav_size_direct(a) (1 + sizeof(dav_lock_discovery_fixed) \
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder + sizeof(apr_uuid_t) \
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder + ((a)->owner ? strlen((a)->owner) : 0) \
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder + ((a)->auth_user ? strlen((a)->auth_user) : 0) \
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder + 2)
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/* Stored indirect lock info - lock token and apr_datum_t */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder#define dav_size_indirect(a) (1 + sizeof(apr_uuid_t) \
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder + sizeof(time_t) \
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder + sizeof(int) + (a)->key.dsize)
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder/*
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder * The lockdb structure.
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder *
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder * The <db> field may be NULL, meaning one of two things:
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * 1) That we have not actually opened the underlying database (yet). The
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * <opened> field should be false.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * 2) We opened it readonly and it wasn't present.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * The delayed opening (determined by <opened>) makes creating a lockdb
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * quick, while deferring the underlying I/O until it is actually required.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * We export the notion of a lockdb, but hide the details of it. Most
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * implementations will use a database of some kind, but it is certainly
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * possible that alternatives could be used.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maederstruct dav_lockdb_private
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder{
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder request_rec *r; /* for accessing the uuid state */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder apr_pool_t *pool; /* a pool to use */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder const char *lockdb_path; /* where is the lock database? */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder int opened; /* we opened the database */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder apr_dbm_t *db; /* if non-NULL, the lock database */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder};
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maedertypedef struct
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder{
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder dav_lockdb pub;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder dav_lockdb_private priv;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder} dav_lockdb_combined;
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder/*
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * The private part of the lock structure.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maederstruct dav_lock_private
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder{
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder apr_datum_t key; /* key into the lock database */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder};
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maedertypedef struct
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder{
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder dav_lock pub;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder dav_lock_private priv;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder dav_locktoken token;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder} dav_lock_combined;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder/*
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder * This must be forward-declared so the open_lockdb function can use it.
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maederextern const dav_hooks_locks dav_hooks_locks_generic;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maederstatic dav_error * dav_generic_dbm_new_error(apr_dbm_t *db, apr_pool_t *p,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder apr_status_t status)
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder{
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder int errcode;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder const char *errstr;
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder dav_error *err;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder char errbuf[200];
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder if (status == APR_SUCCESS) {
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder return NULL;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder }
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder /* There might not be a <db> if we had problems creating it. */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder if (db == NULL) {
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder errcode = 1;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder errstr = "Could not open property database.";
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder }
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder else {
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder (void) apr_dbm_geterror(db, &errcode, errbuf, sizeof(errbuf));
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder errstr = apr_pstrdup(p, errbuf);
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder }
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder err = dav_new_error(p, HTTP_INTERNAL_SERVER_ERROR, errcode, status, errstr);
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder return err;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder}
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
31c6978fd9066c9d2c3c98c950f7abbe89112522Christian Maeder/* internal function for creating locks */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maederstatic dav_lock *dav_generic_alloc_lock(dav_lockdb *lockdb, apr_datum_t key,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder const dav_locktoken *locktoken)
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder{
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder dav_lock_combined *comb;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder comb = apr_pcalloc(lockdb->info->pool, sizeof(*comb));
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder comb->pub.rectype = DAV_LOCKREC_DIRECT;
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder comb->pub.info = &comb->priv;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder comb->priv.key = key;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder if (locktoken == NULL) {
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder comb->pub.locktoken = &comb->token;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder apr_uuid_get(&comb->token.uuid);
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder }
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder else {
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder comb->pub.locktoken = locktoken;
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder }
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder return &comb->pub;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder}
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder/*
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * dav_generic_parse_locktoken
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * Parse an opaquelocktoken URI into a locktoken.
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder */
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maederstatic dav_error * dav_generic_parse_locktoken(apr_pool_t *p,
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder const char *char_token,
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder dav_locktoken **locktoken_p)
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder{
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder dav_locktoken *locktoken;
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder
96de7ec4008f75574077816c4c71a22e6afe1e01Christian Maeder if (ap_strstr_c(char_token, "opaquelocktoken:") != char_token) {
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder return dav_new_error(p,
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder HTTP_BAD_REQUEST, DAV_ERR_LOCK_UNK_STATE_TOKEN, 0,
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder "The lock token uses an unknown State-token "
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder "format and could not be parsed.");
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder }
96de7ec4008f75574077816c4c71a22e6afe1e01Christian Maeder char_token += 16;
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder locktoken = apr_pcalloc(p, sizeof(*locktoken));
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder if (apr_uuid_parse(&locktoken->uuid, char_token)) {
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder return dav_new_error(p, HTTP_BAD_REQUEST, DAV_ERR_LOCK_PARSE_TOKEN, 0,
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder "The opaquelocktoken has an incorrect format "
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder "and could not be parsed.");
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder }
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder *locktoken_p = locktoken;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder return NULL;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder}
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder/*
ce59e0cc5c7221245ed323290bfccbda4ee32dd9Christian Maeder * dav_generic_format_locktoken
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder *
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * Generate the URI for a locktoken
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder */
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maederstatic const char *dav_generic_format_locktoken(apr_pool_t *p,
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder const dav_locktoken *locktoken)
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder{
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder char buf[APR_UUID_FORMATTED_LENGTH + 1];
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder apr_uuid_format(buf, &locktoken->uuid);
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder return apr_pstrcat(p, "opaquelocktoken:", buf, NULL);
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder}
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder/*
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * dav_generic_compare_locktoken
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder *
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * Determine whether two locktokens are the same
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder */
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maederstatic int dav_generic_compare_locktoken(const dav_locktoken *lt1,
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder const dav_locktoken *lt2)
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder{
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder return dav_compare_locktoken(lt1, lt2);
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder}
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder/*
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * dav_generic_really_open_lockdb:
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder *
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder * If the database hasn't been opened yet, then open the thing.
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder */
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maederstatic dav_error * dav_generic_really_open_lockdb(dav_lockdb *lockdb)
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder{
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder dav_error *err;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder apr_status_t status;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder if (lockdb->info->opened) {
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder return NULL;
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder }
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder status = apr_dbm_open(&lockdb->info->db, lockdb->info->lockdb_path,
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder lockdb->ro ? APR_DBM_READONLY : APR_DBM_RWCREATE,
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder APR_OS_DEFAULT, lockdb->info->pool);
af1cb109bce240bcafe3823df022d6088cbfc438Christian Maeder
bd8ff5b5f66be563e5be9d3a0c069e32d06f331cChristian Maeder if (status) {
96de7ec4008f75574077816c4c71a22e6afe1e01Christian Maeder err = dav_generic_dbm_new_error(lockdb->info->db, lockdb->info->pool,
status);
return dav_push_error(lockdb->info->pool,
HTTP_INTERNAL_SERVER_ERROR,
DAV_ERR_LOCK_OPENDB,
"Could not open the lock database.",
err);
}
/* all right. it is opened now. */
lockdb->info->opened = 1;
return NULL;
}
/*
* dav_generic_open_lockdb:
*
* "open" the lock database, as specified in the global server configuration.
* If force is TRUE, then the database is opened now, rather than lazily.
*
* Note that only one can be open read/write.
*/
static dav_error * dav_generic_open_lockdb(request_rec *r, int ro, int force,
dav_lockdb **lockdb)
{
dav_lockdb_combined *comb;
comb = apr_pcalloc(r->pool, sizeof(*comb));
comb->pub.hooks = &dav_hooks_locks_generic;
comb->pub.ro = ro;
comb->pub.info = &comb->priv;
comb->priv.r = r;
comb->priv.pool = r->pool;
comb->priv.lockdb_path = dav_generic_get_lockdb_path(r);
if (comb->priv.lockdb_path == NULL) {
return dav_new_error(r->pool, HTTP_INTERNAL_SERVER_ERROR,
DAV_ERR_LOCK_NO_DB, 0,
"A lock database was not specified with the "
"DAVGenericLockDB directive. One must be "
"specified to use the locking functionality.");
}
/* done initializing. return it. */
*lockdb = &comb->pub;
if (force) {
/* ### add a higher-level comment? */
return dav_generic_really_open_lockdb(*lockdb);
}
return NULL;
}
/*
* dav_generic_close_lockdb:
*
* Close it. Duh.
*/
static void dav_generic_close_lockdb(dav_lockdb *lockdb)
{
if (lockdb->info->db != NULL) {
apr_dbm_close(lockdb->info->db);
}
lockdb->info->opened = 0;
}
/*
* dav_generic_build_key
*
* Given a pathname, build a DAV_TYPE_FNAME lock database key.
*/
static apr_datum_t dav_generic_build_key(apr_pool_t *p,
const dav_resource *resource)
{
apr_datum_t key;
const char *pathname = resource->uri;
/* ### does this allocation have a proper lifetime? need to check */
/* ### can we use a buffer for this? */
/* size is TYPE + pathname + null */
key.dsize = strlen(pathname) + 2;
key.dptr = apr_palloc(p, key.dsize);
*key.dptr = DAV_TYPE_FNAME;
memcpy(key.dptr + 1, pathname, key.dsize - 1);
if (key.dptr[key.dsize - 2] == '/')
key.dptr[--key.dsize - 1] = '\0';
return key;
}
/*
* dav_generic_lock_expired: return 1 (true) if the given timeout is in the
* past or present (the lock has expired), or 0 (false) if in the future
* (the lock has not yet expired).
*/
static int dav_generic_lock_expired(time_t expires)
{
return expires != DAV_TIMEOUT_INFINITE && time(NULL) >= expires;
}
/*
* dav_generic_save_lock_record: Saves the lock information specified in the
* direct and indirect lock lists about path into the lock database.
* If direct and indirect == NULL, the key is removed.
*/
static dav_error * dav_generic_save_lock_record(dav_lockdb *lockdb,
apr_datum_t key,
dav_lock_discovery *direct,
dav_lock_indirect *indirect)
{
dav_error *err;
apr_status_t status;
apr_datum_t val = { 0 };
char *ptr;
dav_lock_discovery *dp = direct;
dav_lock_indirect *ip = indirect;
#if DAV_DEBUG
if (lockdb->ro) {
return dav_new_error(lockdb->info->pool,
HTTP_INTERNAL_SERVER_ERROR, 0, 0,
"INTERNAL DESIGN ERROR: the lockdb was opened "
"readonly, but an attempt to save locks was "
"performed.");
}
#endif
if ((err = dav_generic_really_open_lockdb(lockdb)) != NULL) {
/* ### add a higher-level error? */
return err;
}
/* If nothing to save, delete key */
if (dp == NULL && ip == NULL) {
/* don't fail if the key is not present */
/* ### but what about other errors? */
apr_dbm_delete(lockdb->info->db, key);
return NULL;
}
while(dp) {
val.dsize += dav_size_direct(dp);
dp = dp->next;
}
while(ip) {
val.dsize += dav_size_indirect(ip);
ip = ip->next;
}
/* ### can this be apr_palloc() ? */
/* ### hmmm.... investigate the use of a buffer here */
ptr = val.dptr = apr_pcalloc(lockdb->info->pool, val.dsize);
dp = direct;
ip = indirect;
while(dp) {
/* Direct lock - lock_discovery struct follows */
*ptr++ = DAV_LOCK_DIRECT;
memcpy(ptr, dp, sizeof(dp->f)); /* Fixed portion of struct */
ptr += sizeof(dp->f);
memcpy(ptr, dp->locktoken, sizeof(*dp->locktoken));
ptr += sizeof(*dp->locktoken);
if (dp->owner == NULL) {
*ptr++ = '\0';
}
else {
memcpy(ptr, dp->owner, strlen(dp->owner) + 1);
ptr += strlen(dp->owner) + 1;
}
if (dp->auth_user == NULL) {
*ptr++ = '\0';
}
else {
memcpy(ptr, dp->auth_user, strlen(dp->auth_user) + 1);
ptr += strlen(dp->auth_user) + 1;
}
dp = dp->next;
}
while(ip) {
/* Indirect lock prefix */
*ptr++ = DAV_LOCK_INDIRECT;
memcpy(ptr, ip->locktoken, sizeof(*ip->locktoken));
ptr += sizeof(*ip->locktoken);
memcpy(ptr, &ip->timeout, sizeof(ip->timeout));
ptr += sizeof(ip->timeout);
memcpy(ptr, &ip->key.dsize, sizeof(ip->key.dsize));
ptr += sizeof(ip->key.dsize);
memcpy(ptr, ip->key.dptr, ip->key.dsize);
ptr += ip->key.dsize;
ip = ip->next;
}
if ((status = apr_dbm_store(lockdb->info->db, key, val)) != APR_SUCCESS) {
/* ### more details? add an error_id? */
err = dav_generic_dbm_new_error(lockdb->info->db, lockdb->info->pool,
status);
return dav_push_error(lockdb->info->pool,
HTTP_INTERNAL_SERVER_ERROR,
DAV_ERR_LOCK_SAVE_LOCK,
"Could not save lock information.",
err);
}
return NULL;
}
/*
* dav_load_lock_record: Reads lock information about key from lock db;
* creates linked lists of the direct and indirect locks.
*
* If add_method = DAV_APPEND_LIST, the result will be appended to the
* head of the direct and indirect lists supplied.
*
* Passive lock removal: If lock has timed out, it will not be returned.
* ### How much "logging" does RFC 2518 require?
*/
static dav_error * dav_generic_load_lock_record(dav_lockdb *lockdb,
apr_datum_t key,
int add_method,
dav_lock_discovery **direct,
dav_lock_indirect **indirect)
{
apr_pool_t *p = lockdb->info->pool;
dav_error *err;
apr_status_t status;
apr_size_t offset = 0;
int need_save = DAV_FALSE;
apr_datum_t val = { 0 };
dav_lock_discovery *dp;
dav_lock_indirect *ip;
if (add_method != DAV_APPEND_LIST) {
*direct = NULL;
*indirect = NULL;
}
if ((err = dav_generic_really_open_lockdb(lockdb)) != NULL) {
/* ### add a higher-level error? */
return err;
}
/*
* If we opened readonly and the db wasn't there, then there are no
* locks for this resource. Just exit.
*/
if (lockdb->info->db == NULL) {
return NULL;
}
if ((status = apr_dbm_fetch(lockdb->info->db, key, &val)) != APR_SUCCESS) {
return dav_generic_dbm_new_error(lockdb->info->db, p, status);
}
if (!val.dsize) {
return NULL;
}
while (offset < val.dsize) {
switch (*(val.dptr + offset++)) {
case DAV_LOCK_DIRECT:
/* Create and fill a dav_lock_discovery structure */
dp = apr_pcalloc(p, sizeof(*dp));
/* Copy the dav_lock_discovery_fixed portion */
memcpy(dp, val.dptr + offset, sizeof(dp->f));
offset += sizeof(dp->f);
/* Copy the lock token. */
dp->locktoken = apr_pmemdup(p, val.dptr + offset, sizeof(*dp->locktoken));
offset += sizeof(*dp->locktoken);
/* Do we have an owner field? */
if (*(val.dptr + offset) == '\0') {
++offset;
}
else {
apr_size_t len = strlen(val.dptr + offset);
dp->owner = apr_pstrmemdup(p, val.dptr + offset, len);
offset += len + 1;
}
if (*(val.dptr + offset) == '\0') {
++offset;
}
else {
apr_size_t len = strlen(val.dptr + offset);
dp->auth_user = apr_pstrmemdup(p, val.dptr + offset, len);
offset += len + 1;
}
if (!dav_generic_lock_expired(dp->f.timeout)) {
dp->next = *direct;
*direct = dp;
}
else {
need_save = DAV_TRUE;
}
break;
case DAV_LOCK_INDIRECT:
/* Create and fill a dav_lock_indirect structure */
ip = apr_pcalloc(p, sizeof(*ip));
ip->locktoken = apr_pmemdup(p, val.dptr + offset, sizeof(*ip->locktoken));
offset += sizeof(*ip->locktoken);
memcpy(&ip->timeout, val.dptr + offset, sizeof(ip->timeout));
offset += sizeof(ip->timeout);
/* length of datum */
ip->key.dsize = *((int *) (val.dptr + offset));
offset += sizeof(ip->key.dsize);
ip->key.dptr = apr_pmemdup(p, val.dptr + offset, ip->key.dsize);
offset += ip->key.dsize;
if (!dav_generic_lock_expired(ip->timeout)) {
ip->next = *indirect;
*indirect = ip;
}
else {
need_save = DAV_TRUE;
}
break;
default:
apr_dbm_freedatum(lockdb->info->db, val);
/* ### should use a computed_desc and insert corrupt token data */
--offset;
return dav_new_error(p,
HTTP_INTERNAL_SERVER_ERROR,
DAV_ERR_LOCK_CORRUPT_DB, 0,
apr_psprintf(p,
"The lock database was found to "
"be corrupt. offset %"
APR_SIZE_T_FMT ", c=%02x",
offset, val.dptr[offset]));
}
}
apr_dbm_freedatum(lockdb->info->db, val);
/* Clean up this record if we found expired locks */
/*
* ### shouldn't do this if we've been opened READONLY. elide the
* ### timed-out locks from the response, but don't save that info back
*/
if (need_save == DAV_TRUE) {
return dav_generic_save_lock_record(lockdb, key, *direct, *indirect);
}
return NULL;
}
/* resolve <indirect>, returning <*direct> */
static dav_error * dav_generic_resolve(dav_lockdb *lockdb,
dav_lock_indirect *indirect,
dav_lock_discovery **direct,
dav_lock_discovery **ref_dp,
dav_lock_indirect **ref_ip)
{
dav_error *err;
dav_lock_discovery *dir;
dav_lock_indirect *ind;
if ((err = dav_generic_load_lock_record(lockdb, indirect->key,
DAV_CREATE_LIST,
&dir, &ind)) != NULL) {
/* ### insert a higher-level description? */
return err;
}
if (ref_dp != NULL) {
*ref_dp = dir;
*ref_ip = ind;
}
for (; dir != NULL; dir = dir->next) {
if (!dav_compare_locktoken(indirect->locktoken, dir->locktoken)) {
*direct = dir;
return NULL;
}
}
/* No match found (but we should have found one!) */
/* ### use a different description and/or error ID? */
return dav_new_error(lockdb->info->pool,
HTTP_INTERNAL_SERVER_ERROR,
DAV_ERR_LOCK_CORRUPT_DB, 0,
"The lock database was found to be corrupt. "
"An indirect lock's direct lock could not "
"be found.");
}
/* ---------------------------------------------------------------
*
* Property-related lock functions
*
*/
/*
* dav_generic_get_supportedlock: Returns a static string for all
* supportedlock properties. I think we save more returning a static string
* than constructing it every time, though it might look cleaner.
*/
static const char *dav_generic_get_supportedlock(const dav_resource *resource)
{
static const char supported[] = DEBUG_CR
"<D:lockentry>" DEBUG_CR
"<D:lockscope><D:exclusive/></D:lockscope>" DEBUG_CR
"<D:locktype><D:write/></D:locktype>" DEBUG_CR
"</D:lockentry>" DEBUG_CR
"<D:lockentry>" DEBUG_CR
"<D:lockscope><D:shared/></D:lockscope>" DEBUG_CR
"<D:locktype><D:write/></D:locktype>" DEBUG_CR
"</D:lockentry>" DEBUG_CR;
return supported;
}
/* ---------------------------------------------------------------
*
* General lock functions
*
*/
static dav_error * dav_generic_remove_locknull_state(dav_lockdb *lockdb,
const dav_resource *resource)
{
/* We don't need to do anything. */
return NULL;
}
static dav_error * dav_generic_create_lock(dav_lockdb *lockdb,
const dav_resource *resource,
dav_lock **lock)
{
apr_datum_t key;
key = dav_generic_build_key(lockdb->info->pool, resource);
*lock = dav_generic_alloc_lock(lockdb, key, NULL);
(*lock)->is_locknull = !resource->exists;
return NULL;
}
static dav_error * dav_generic_get_locks(dav_lockdb *lockdb,
const dav_resource *resource,
int calltype,
dav_lock **locks)
{
apr_pool_t *p = lockdb->info->pool;
apr_datum_t key;
dav_error *err;
dav_lock *lock = NULL;
dav_lock *newlock;
dav_lock_discovery *dp;
dav_lock_indirect *ip;
#if DAV_DEBUG
if (calltype == DAV_GETLOCKS_COMPLETE) {
return dav_new_error(lockdb->info->pool,
HTTP_INTERNAL_SERVER_ERROR, 0, 0,
"INTERNAL DESIGN ERROR: DAV_GETLOCKS_COMPLETE "
"is not yet supported");
}
#endif
key = dav_generic_build_key(p, resource);
if ((err = dav_generic_load_lock_record(lockdb, key, DAV_CREATE_LIST,
&dp, &ip)) != NULL) {
/* ### push a higher-level desc? */
return err;
}
/* copy all direct locks to the result list */
for (; dp != NULL; dp = dp->next) {
newlock = dav_generic_alloc_lock(lockdb, key, dp->locktoken);
newlock->is_locknull = !resource->exists;
newlock->scope = dp->f.scope;
newlock->type = dp->f.type;
newlock->depth = dp->f.depth;
newlock->timeout = dp->f.timeout;
newlock->owner = dp->owner;
newlock->auth_user = dp->auth_user;
/* hook into the result list */
newlock->next = lock;
lock = newlock;
}
/* copy all the indirect locks to the result list. resolve as needed. */
for (; ip != NULL; ip = ip->next) {
newlock = dav_generic_alloc_lock(lockdb, ip->key, ip->locktoken);
newlock->is_locknull = !resource->exists;
if (calltype == DAV_GETLOCKS_RESOLVED) {
err = dav_generic_resolve(lockdb, ip, &dp, NULL, NULL);
if (err != NULL) {
/* ### push a higher-level desc? */
return err;
}
newlock->scope = dp->f.scope;
newlock->type = dp->f.type;
newlock->depth = dp->f.depth;
newlock->timeout = dp->f.timeout;
newlock->owner = dp->owner;
newlock->auth_user = dp->auth_user;
}
else {
/* DAV_GETLOCKS_PARTIAL */
newlock->rectype = DAV_LOCKREC_INDIRECT_PARTIAL;
}
/* hook into the result list */
newlock->next = lock;
lock = newlock;
}
*locks = lock;
return NULL;
}
static dav_error * dav_generic_find_lock(dav_lockdb *lockdb,
const dav_resource *resource,
const dav_locktoken *locktoken,
int partial_ok,
dav_lock **lock)
{
dav_error *err;
apr_datum_t key;
dav_lock_discovery *dp;
dav_lock_indirect *ip;
*lock = NULL;
key = dav_generic_build_key(lockdb->info->pool, resource);
if ((err = dav_generic_load_lock_record(lockdb, key, DAV_CREATE_LIST,
&dp, &ip)) != NULL) {
/* ### push a higher-level desc? */
return err;
}
for (; dp != NULL; dp = dp->next) {
if (!dav_compare_locktoken(locktoken, dp->locktoken)) {
*lock = dav_generic_alloc_lock(lockdb, key, locktoken);
(*lock)->is_locknull = !resource->exists;
(*lock)->scope = dp->f.scope;
(*lock)->type = dp->f.type;
(*lock)->depth = dp->f.depth;
(*lock)->timeout = dp->f.timeout;
(*lock)->owner = dp->owner;
(*lock)->auth_user = dp->auth_user;
return NULL;
}
}
for (; ip != NULL; ip = ip->next) {
if (!dav_compare_locktoken(locktoken, ip->locktoken)) {
*lock = dav_generic_alloc_lock(lockdb, ip->key, locktoken);
(*lock)->is_locknull = !resource->exists;
/* ### nobody uses the resolving right now! */
if (partial_ok) {
(*lock)->rectype = DAV_LOCKREC_INDIRECT_PARTIAL;
}
else {
(*lock)->rectype = DAV_LOCKREC_INDIRECT;
if ((err = dav_generic_resolve(lockdb, ip, &dp,
NULL, NULL)) != NULL) {
/* ### push a higher-level desc? */
return err;
}
(*lock)->scope = dp->f.scope;
(*lock)->type = dp->f.type;
(*lock)->depth = dp->f.depth;
(*lock)->timeout = dp->f.timeout;
(*lock)->owner = dp->owner;
(*lock)->auth_user = dp->auth_user;
}
return NULL;
}
}
return NULL;
}
static dav_error * dav_generic_has_locks(dav_lockdb *lockdb,
const dav_resource *resource,
int *locks_present)
{
dav_error *err;
apr_datum_t key;
*locks_present = 0;
if ((err = dav_generic_really_open_lockdb(lockdb)) != NULL) {
/* ### insert a higher-level error description */
return err;
}
/*
* If we opened readonly and the db wasn't there, then there are no
* locks for this resource. Just exit.
*/
if (lockdb->info->db == NULL)
return NULL;
key = dav_generic_build_key(lockdb->info->pool, resource);
*locks_present = apr_dbm_exists(lockdb->info->db, key);
return NULL;
}
static dav_error * dav_generic_append_locks(dav_lockdb *lockdb,
const dav_resource *resource,
int make_indirect,
const dav_lock *lock)
{
apr_pool_t *p = lockdb->info->pool;
dav_error *err;
dav_lock_indirect *ip;
dav_lock_discovery *dp;
apr_datum_t key;
key = dav_generic_build_key(lockdb->info->pool, resource);
err = dav_generic_load_lock_record(lockdb, key, 0, &dp, &ip);
if (err != NULL) {
/* ### maybe add in a higher-level description */
return err;
}
/*
* ### when we store the lock more directly, we need to update
* ### lock->rectype and lock->is_locknull
*/
if (make_indirect) {
for (; lock != NULL; lock = lock->next) {
/* ### this works for any <lock> rectype */
dav_lock_indirect *newi = apr_pcalloc(p, sizeof(*newi));
/* ### shut off the const warning for now */
newi->locktoken = (dav_locktoken *)lock->locktoken;
newi->timeout = lock->timeout;
newi->key = lock->info->key;
newi->next = ip;
ip = newi;
}
}
else {
for (; lock != NULL; lock = lock->next) {
/* create and link in the right kind of lock */
if (lock->rectype == DAV_LOCKREC_DIRECT) {
dav_lock_discovery *newd = apr_pcalloc(p, sizeof(*newd));
newd->f.scope = lock->scope;
newd->f.type = lock->type;
newd->f.depth = lock->depth;
newd->f.timeout = lock->timeout;
/* ### shut off the const warning for now */
newd->locktoken = (dav_locktoken *)lock->locktoken;
newd->owner = lock->owner;
newd->auth_user = lock->auth_user;
newd->next = dp;
dp = newd;
}
else {
/* DAV_LOCKREC_INDIRECT(_PARTIAL) */
dav_lock_indirect *newi = apr_pcalloc(p, sizeof(*newi));
/* ### shut off the const warning for now */
newi->locktoken = (dav_locktoken *)lock->locktoken;
newi->key = lock->info->key;
newi->next = ip;
ip = newi;
}
}
}
if ((err = dav_generic_save_lock_record(lockdb, key, dp, ip)) != NULL) {
/* ### maybe add a higher-level description */
return err;
}
return NULL;
}
static dav_error * dav_generic_remove_lock(dav_lockdb *lockdb,
const dav_resource *resource,
const dav_locktoken *locktoken)
{
dav_error *err;
dav_lock_discovery *dh = NULL;
dav_lock_indirect *ih = NULL;
apr_datum_t key;
key = dav_generic_build_key(lockdb->info->pool, resource);
if (locktoken != NULL) {
dav_lock_discovery *dp;
dav_lock_discovery *dprev = NULL;
dav_lock_indirect *ip;
dav_lock_indirect *iprev = NULL;
if ((err = dav_generic_load_lock_record(lockdb, key, DAV_CREATE_LIST,
&dh, &ih)) != NULL) {
/* ### maybe add a higher-level description */
return err;
}
for (dp = dh; dp != NULL; dp = dp->next) {
if (dav_compare_locktoken(locktoken, dp->locktoken) == 0) {
if (dprev)
dprev->next = dp->next;
else
dh = dh->next;
}
dprev = dp;
}
for (ip = ih; ip != NULL; ip = ip->next) {
if (dav_compare_locktoken(locktoken, ip->locktoken) == 0) {
if (iprev)
iprev->next = ip->next;
else
ih = ih->next;
}
iprev = ip;
}
}
/* save the modified locks, or remove all locks (dh=ih=NULL). */
if ((err = dav_generic_save_lock_record(lockdb, key, dh, ih)) != NULL) {
/* ### maybe add a higher-level description */
return err;
}
return NULL;
}
static int dav_generic_do_refresh(dav_lock_discovery *dp,
const dav_locktoken_list *ltl,
time_t new_time)
{
int dirty = 0;
for (; ltl != NULL; ltl = ltl->next) {
if (dav_compare_locktoken(dp->locktoken, ltl->locktoken) == 0)
{
dp->f.timeout = new_time;
dirty = 1;
break;
}
}
return dirty;
}
static dav_error * dav_generic_refresh_locks(dav_lockdb *lockdb,
const dav_resource *resource,
const dav_locktoken_list *ltl,
time_t new_time,
dav_lock **locks)
{
dav_error *err;
apr_datum_t key;
dav_lock_discovery *dp;
dav_lock_discovery *dp_scan;
dav_lock_indirect *ip;
int dirty = 0;
dav_lock *newlock;
*locks = NULL;
key = dav_generic_build_key(lockdb->info->pool, resource);
if ((err = dav_generic_load_lock_record(lockdb, key, DAV_CREATE_LIST,
&dp, &ip)) != NULL) {
/* ### maybe add in a higher-level description */
return err;
}
/* ### we should be refreshing direct AND (resolved) indirect locks! */
/* refresh all of the direct locks on this resource */
for (dp_scan = dp; dp_scan != NULL; dp_scan = dp_scan->next) {
if (dav_generic_do_refresh(dp_scan, ltl, new_time)) {
/* the lock was refreshed. return the lock. */
newlock = dav_generic_alloc_lock(lockdb, key, dp_scan->locktoken);
newlock->is_locknull = !resource->exists;
newlock->scope = dp_scan->f.scope;
newlock->type = dp_scan->f.type;
newlock->depth = dp_scan->f.depth;
newlock->timeout = dp_scan->f.timeout;
newlock->owner = dp_scan->owner;
newlock->auth_user = dp_scan->auth_user;
newlock->next = *locks;
*locks = newlock;
dirty = 1;
}
}
/* if we refreshed any locks, then save them back. */
if (dirty
&& (err = dav_generic_save_lock_record(lockdb, key, dp, ip)) != NULL) {
/* ### maybe add in a higher-level description */
return err;
}
/* for each indirect lock, find its direct lock and refresh it. */
for (; ip != NULL; ip = ip->next) {
dav_lock_discovery *ref_dp;
dav_lock_indirect *ref_ip;
if ((err = dav_generic_resolve(lockdb, ip, &dp_scan,
&ref_dp, &ref_ip)) != NULL) {
/* ### push a higher-level desc? */
return err;
}
if (dav_generic_do_refresh(dp_scan, ltl, new_time)) {
/* the lock was refreshed. return the lock. */
newlock = dav_generic_alloc_lock(lockdb, ip->key, dp->locktoken);
newlock->is_locknull = !resource->exists;
newlock->scope = dp->f.scope;
newlock->type = dp->f.type;
newlock->depth = dp->f.depth;
newlock->timeout = dp->f.timeout;
newlock->owner = dp->owner;
newlock->auth_user = dp_scan->auth_user;
newlock->next = *locks;
*locks = newlock;
/* save the (resolved) direct lock back */
if ((err = dav_generic_save_lock_record(lockdb, ip->key, ref_dp,
ref_ip)) != NULL) {
/* ### push a higher-level desc? */
return err;
}
}
}
return NULL;
}
const dav_hooks_locks dav_hooks_locks_generic =
{
dav_generic_get_supportedlock,
dav_generic_parse_locktoken,
dav_generic_format_locktoken,
dav_generic_compare_locktoken,
dav_generic_open_lockdb,
dav_generic_close_lockdb,
dav_generic_remove_locknull_state,
dav_generic_create_lock,
dav_generic_get_locks,
dav_generic_find_lock,
dav_generic_has_locks,
dav_generic_append_locks,
dav_generic_remove_lock,
dav_generic_refresh_locks,
NULL, /* lookup_resource */
NULL /* ctx */
};