Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Apache/server/ (Apache Software Stiftung Version 2.4.65^©) Datei vom 4.5.2025 mit Größe 22 kB

Quelle scoreboard.c Sprache: C

/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#include "apr.h"
#include "apr_strings.h"
#include "apr_portable.h"
#include "apr_lib.h"

#define APR_WANT_STRFUNC
#include "apr_want.h"

#if APR_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#include "ap_config.h"
#include "httpd.h"
#include "http_log.h"
#include "http_main.h"
#include "http_core.h"
#include "http_config.h"
#include "http_protocol.h"
#include "ap_mpm.h"

#include "scoreboard.h"

/* we know core's module_index is 0 */
#undef APLOG_MODULE_INDEX
#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX

AP_DECLARE_DATA scoreboard *ap_scoreboard_image = NULL;
AP_DECLARE_DATA const char *ap_scoreboard_fname = NULL;
static ap_scoreboard_e scoreboard_type;

const char * ap_set_scoreboard(cmd_parms *cmd, void *dummy,
                               const char *arg)
{
    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
    if (err != NULL) {
        return err;
    }

    ap_scoreboard_fname = arg;
    return NULL;
}

/* Default to false when mod_status is not loaded */
AP_DECLARE_DATA int ap_extended_status = 0;

const char *ap_set_extended_status(cmd_parms *cmd, void *dummy, int arg)
{
    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
    if (err != NULL) {
        return err;
    }
    ap_extended_status = arg;
    return NULL;
}

AP_DECLARE_DATA int ap_mod_status_reqtail = 0;

const char *ap_set_reqtail(cmd_parms *cmd, void *dummy, int arg)
{
    const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY);
    if (err != NULL) {
        return err;
    }
    ap_mod_status_reqtail = arg;
    return NULL;
}

#if APR_HAS_SHARED_MEMORY

#include "apr_shm.h"

#ifndef WIN32
static /* but must be exported to mpm_winnt */
#endif
        apr_shm_t *ap_scoreboard_shm = NULL;

#endif

APR_HOOK_STRUCT(
    APR_HOOK_LINK(pre_mpm)
)

AP_IMPLEMENT_HOOK_RUN_ALL(int,pre_mpm,
                          (apr_pool_t *p, ap_scoreboard_e sb_type),
                          (p, sb_type),OK,DECLINED)

static APR_OPTIONAL_FN_TYPE(ap_logio_get_last_bytes)
                                *pfn_ap_logio_get_last_bytes;

struct ap_sb_handle_t {
    int child_num;
    int thread_num;
};

static int server_limit, thread_limit;
static apr_size_t scoreboard_size;

/*
* ToDo:
* This function should be renamed to cleanup_shared
* and it should handle cleaning up a scoreboard shared
* between processes using any form of IPC (file, shared memory
* segment, etc.). Leave it as is now because it is being used
* by various MPMs.
*/
static apr_status_t ap_cleanup_shared_mem(void *d)
{
#if APR_HAS_SHARED_MEMORY
    free(ap_scoreboard_image);
    ap_scoreboard_image = NULL;
    apr_shm_destroy(ap_scoreboard_shm);
#endif
    return APR_SUCCESS;
}

#define SIZE_OF_scoreboard    APR_ALIGN_DEFAULT(sizeof(scoreboard))
#define SIZE_OF_global_score  APR_ALIGN_DEFAULT(sizeof(global_score))
#define SIZE_OF_process_score APR_ALIGN_DEFAULT(sizeof(process_score))
#define SIZE_OF_worker_score  APR_ALIGN_DEFAULT(sizeof(worker_score))

AP_DECLARE(int) ap_calc_scoreboard_size(void)
{
    ap_mpm_query(AP_MPMQ_HARD_LIMIT_THREADS, &thread_limit);
    ap_mpm_query(AP_MPMQ_HARD_LIMIT_DAEMONS, &server_limit);

    scoreboard_size  = SIZE_OF_global_score;
    scoreboard_size += SIZE_OF_process_score * server_limit;
    scoreboard_size += SIZE_OF_worker_score * server_limit * thread_limit;

    return scoreboard_size;
}

AP_DECLARE(void) ap_init_scoreboard(void *shared_score)
{
    char *more_storage;
    int i;

    pfn_ap_logio_get_last_bytes = APR_RETRIEVE_OPTIONAL_FN(ap_logio_get_last_bytes);
    if (!shared_score) {
        return;
    }

    ap_calc_scoreboard_size();
    ap_scoreboard_image =
        ap_calloc(1, SIZE_OF_scoreboard + server_limit * sizeof(worker_score *));
    more_storage = shared_score;
    ap_scoreboard_image->global = (global_score *)more_storage;
    more_storage += SIZE_OF_global_score;
    ap_scoreboard_image->parent = (process_score *)more_storage;
    more_storage += SIZE_OF_process_score * server_limit;
    ap_scoreboard_image->servers =
        (worker_score **)((char*)ap_scoreboard_image + SIZE_OF_scoreboard);
    for (i = 0; i < server_limit; i++) {
        ap_scoreboard_image->servers[i] = (worker_score *)more_storage;
        more_storage += thread_limit * SIZE_OF_worker_score;
    }
    ap_assert(more_storage == (char*)shared_score + scoreboard_size);
    ap_scoreboard_image->global->server_limit = server_limit;
    ap_scoreboard_image->global->thread_limit = thread_limit;
}

/**
* Create a name-based scoreboard in the given pool using the
* given filename.
*/
static apr_status_t create_namebased_scoreboard(apr_pool_t *pool,
                                                const char *fname)
{
#if APR_HAS_SHARED_MEMORY
    apr_status_t rv;

    /* The shared memory file must not exist before we create the
     * segment. */
    apr_shm_remove(fname, pool); /* ignore errors */

    rv = apr_shm_create(&ap_scoreboard_shm, scoreboard_size, fname, pool);
    if (rv != APR_SUCCESS) {
        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00001)
                     "unable to create or access scoreboard \"%s\" "
                     "(name-based shared memory failure)", fname);
        return rv;
    }
#endif /* APR_HAS_SHARED_MEMORY */
    return APR_SUCCESS;
}

/* ToDo: This function should be made to handle setting up
* a scoreboard shared between processes using any IPC technique,
* not just a shared memory segment
*/
static apr_status_t open_scoreboard(apr_pool_t *pconf)
{
#if APR_HAS_SHARED_MEMORY
    apr_status_t rv;
    char *fname = NULL;
    apr_pool_t *global_pool;

    /* We don't want to have to recreate the scoreboard after
     * restarts, so we'll create a global pool and never clean it.
     */
    rv = apr_pool_create(&global_pool, NULL);
    if (rv != APR_SUCCESS) {
        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00002)
                     "Fatal error: unable to create global pool "
                     "for use by the scoreboard");
        return rv;
    }

    /* The config says to create a name-based shmem */
    if (ap_scoreboard_fname) {
        /* make sure it's an absolute pathname */
        fname = ap_server_root_relative(pconf, ap_scoreboard_fname);
        if (!fname) {
            ap_log_error(APLOG_MARK, APLOG_CRIT, APR_EBADPATH, ap_server_conf, APLOGNO(00003)
                         "Fatal error: Invalid Scoreboard path %s",
                         ap_scoreboard_fname);
            return APR_EBADPATH;
        }
        return create_namebased_scoreboard(global_pool, fname);
    }
    else { /* config didn't specify, we get to choose shmem type */
        rv = apr_shm_create(&ap_scoreboard_shm, scoreboard_size, NULL,
                            global_pool); /* anonymous shared memory */
        if ((rv != APR_SUCCESS) && (rv != APR_ENOTIMPL)) {
            ap_log_error(APLOG_MARK, APLOG_CRIT, rv, ap_server_conf, APLOGNO(00004)
                         "Unable to create or access scoreboard "
                         "(anonymous shared memory failure)");
            return rv;
        }
        /* Make up a filename and do name-based shmem */
        else if (rv == APR_ENOTIMPL) {
            /* Make sure it's an absolute pathname */
            ap_scoreboard_fname = DEFAULT_SCOREBOARD;
            fname = ap_server_root_relative(pconf, ap_scoreboard_fname);

            return create_namebased_scoreboard(global_pool, fname);
        }
    }
#endif /* APR_HAS_SHARED_MEMORY */
    return APR_SUCCESS;
}

/* If detach is non-zero, this is a separate child process,
* if zero, it is a forked child.
*/
AP_DECLARE(apr_status_t) ap_reopen_scoreboard(apr_pool_t *p, apr_shm_t **shm,
                                              int detached)
{
#if APR_HAS_SHARED_MEMORY
    if (!detached) {
        return APR_SUCCESS;
    }
    if (apr_shm_size_get(ap_scoreboard_shm) < scoreboard_size) {
        ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf, APLOGNO(00005)
                     "Fatal error: shared scoreboard too small for child!");
        apr_shm_detach(ap_scoreboard_shm);
        ap_scoreboard_shm = NULL;
        return APR_EINVAL;
    }
    /* everything will be cleared shortly */
    if (*shm) {
        *shm = ap_scoreboard_shm;
    }
#endif
    return APR_SUCCESS;
}

apr_status_t ap_cleanup_scoreboard(void *d)
{
    if (ap_scoreboard_image == NULL) {
        return APR_SUCCESS;
    }
    if (scoreboard_type == SB_SHARED) {
        ap_cleanup_shared_mem(NULL);
    }
    else {
        free(ap_scoreboard_image->global);
        free(ap_scoreboard_image);
        ap_scoreboard_image = NULL;
    }
    return APR_SUCCESS;
}

/* Create or reinit an existing scoreboard. The MPM can control whether
* the scoreboard is shared across multiple processes or not
*/
int ap_create_scoreboard(apr_pool_t *p, ap_scoreboard_e sb_type)
{
    int i;
#if APR_HAS_SHARED_MEMORY
    apr_status_t rv;
#endif

    if (ap_scoreboard_image) {
        ap_scoreboard_image->global->restart_time = apr_time_now();
        memset(ap_scoreboard_image->parent, 0,
               SIZE_OF_process_score * server_limit);
        for (i = 0; i < server_limit; i++) {
            memset(ap_scoreboard_image->servers[i], 0,
                   SIZE_OF_worker_score * thread_limit);
        }
        ap_init_scoreboard(NULL);
        return OK;
    }

    ap_calc_scoreboard_size();
#if APR_HAS_SHARED_MEMORY
    if (sb_type == SB_SHARED) {
        void *sb_shared;
        rv = open_scoreboard(p);
        if (rv || !(sb_shared = apr_shm_baseaddr_get(ap_scoreboard_shm))) {
            return HTTP_INTERNAL_SERVER_ERROR;
        }
        memset(sb_shared, 0, scoreboard_size);
        ap_init_scoreboard(sb_shared);
    }
    else
#endif
    {
        /* A simple malloc will suffice */
        void *sb_mem = ap_calloc(1, scoreboard_size);
        ap_init_scoreboard(sb_mem);
    }

    scoreboard_type = sb_type;
    ap_scoreboard_image->global->running_generation = 0;
    ap_scoreboard_image->global->restart_time = apr_time_now();

    apr_pool_cleanup_register(p, NULL, ap_cleanup_scoreboard, apr_pool_cleanup_null);

    return OK;
}

/* Routines called to deal with the scoreboard image
* --- note that we do *not* need write locks, since update_child_status
* only updates a *single* record in place, and only one process writes to
* a given scoreboard slot at a time (either the child process owning that
* slot, or the parent, noting that the child has died).
*
* As a final note --- setting the score entry to getpid() is always safe,
* since when the parent is writing an entry, it's only noting SERVER_DEAD
* anyway.
*/

AP_DECLARE(int) ap_exists_scoreboard_image(void)
{
    return (ap_scoreboard_image ? 1 : 0);
}

AP_DECLARE(void) ap_set_conn_count(ap_sb_handle_t *sb, request_rec *r,
                                   unsigned short conn_count)
{
    worker_score *ws;

    if (!sb)
        return;

    ws = &ap_scoreboard_image->servers[sb->child_num][sb->thread_num];
    ws->conn_count = conn_count;
}

AP_DECLARE(void) ap_increment_counts(ap_sb_handle_t *sb, request_rec *r)
{
    worker_score *ws;
    apr_off_t bytes;

    if (!sb)
        return;

    ws = &ap_scoreboard_image->servers[sb->child_num][sb->thread_num];
    if (pfn_ap_logio_get_last_bytes != NULL) {
        bytes = pfn_ap_logio_get_last_bytes(r->connection);
    }
    else if (r->method_number == M_GET && r->method && r->method[0] == 'H') {
        bytes = 0;
    }
    else {
        bytes = r->bytes_sent;
    }

#ifdef HAVE_TIMES
    times(&ws->times);
#endif
    ws->access_count++;
    ws->my_access_count++;
    ws->conn_count++;
    ws->bytes_served += bytes;
    ws->my_bytes_served += bytes;
    ws->conn_bytes += bytes;
}

AP_DECLARE(int) ap_find_child_by_pid(apr_proc_t *pid)
{
    int i;
    int max_daemons_limit = 0;

    ap_mpm_query(AP_MPMQ_MAX_DAEMON_USED, &max_daemons_limit);

    for (i = 0; i < max_daemons_limit; ++i) {
        if (ap_scoreboard_image->parent[i].pid == pid->pid) {
            return i;
        }
    }

    return -1;
}

AP_DECLARE(void) ap_update_sb_handle(ap_sb_handle_t *sbh,
                                     int child_num, int thread_num)
{
    sbh->child_num = child_num;
    sbh->thread_num = thread_num;
}

AP_DECLARE(void) ap_create_sb_handle(ap_sb_handle_t **new_sbh, apr_pool_t *p,
                                     int child_num, int thread_num)
{
    *new_sbh = (ap_sb_handle_t *)apr_palloc(p, sizeof(ap_sb_handle_t));
    ap_update_sb_handle(*new_sbh, child_num, thread_num);
}

static void copy_request(char *rbuf, apr_size_t rbuflen, request_rec *r)
{
    char *p;

    if (r->the_request == NULL) {
        apr_cpystrn(rbuf, "NULL", rbuflen);
        return; /* short circuit below */
    }

    if (r->parsed_uri.password == NULL) {
        p = r->the_request;
    }
    else {
        /* Don't reveal the password in the server-status view */
        p = apr_pstrcat(r->pool, r->method, " ",
                        apr_uri_unparse(r->pool, &r->parsed_uri,
                        APR_URI_UNP_OMITPASSWORD),
                        r->assbackwards ? NULL : " ", r->protocol, NULL);
    }

    /* now figure out if we copy over the 1st rbuflen chars or the last */
    if (!ap_mod_status_reqtail) {
        apr_cpystrn(rbuf, p, rbuflen);
    }
    else {
        apr_size_t slen = strlen(p);
        if (slen < rbuflen) {
            /* it all fits anyway */
            apr_cpystrn(rbuf, p, rbuflen);
        }
        else {
            apr_cpystrn(rbuf, p+(slen-rbuflen+1), rbuflen);
        }
    }
}

static int update_child_status_internal(int child_num,
                                        int thread_num,
                                        int status,
                                        conn_rec *c,
                                        server_rec *s,
                                        request_rec *r,
                                        const char *descr)
{
    int old_status;
    worker_score *ws;
    int mpm_generation;

    ws = &ap_scoreboard_image->servers[child_num][thread_num];
    old_status = ws->status;
    ws->status = status;

    if (status == SERVER_READY
        && old_status == SERVER_STARTING) {
        process_score *ps = &ap_scoreboard_image->parent[child_num];
        ws->thread_num = child_num * thread_limit + thread_num;
        ap_mpm_query(AP_MPMQ_GENERATION, &mpm_generation);
        ps->generation = mpm_generation;
    }

    if (ap_extended_status) {
        const char *val;

        if (status == SERVER_READY || status == SERVER_DEAD) {
            /*
             * Reset individual counters
             */
            if (status == SERVER_DEAD) {
                ws->my_access_count = 0L;
                ws->my_bytes_served = 0L;
#ifdef HAVE_TIMES
                ws->times.tms_utime = 0;
                ws->times.tms_stime = 0;
                ws->times.tms_cutime = 0;
                ws->times.tms_cstime = 0;
#endif
            }
            ws->conn_count = 0;
            ws->conn_bytes = 0;
            ws->last_used = apr_time_now();
        }

        if (descr) {
            apr_cpystrn(ws->request, descr, sizeof(ws->request));
        }
        else if (r) {
            copy_request(ws->request, sizeof(ws->request), r);
        }
        else if (c) {
            ws->request[0]='\0';
        }

        if (r && r->useragent_ip) {
            if (!(val = ap_get_useragent_host(r, REMOTE_NOLOOKUP, NULL))) {
                apr_cpystrn(ws->client, r->useragent_ip, sizeof(ws->client)); /* DEPRECATE */
                apr_cpystrn(ws->client64, r->useragent_ip, sizeof(ws->client64));
            }
            else {
                apr_cpystrn(ws->client, val, sizeof(ws->client)); /* DEPRECATE */
                apr_cpystrn(ws->client64, val, sizeof(ws->client64));
            }
        }
        else if (c) {
            if (!(val = ap_get_remote_host(c, c->base_server->lookup_defaults,
                                           REMOTE_NOLOOKUP, NULL))) {
                apr_cpystrn(ws->client, c->client_ip, sizeof(ws->client)); /* DEPRECATE */
                apr_cpystrn(ws->client64, c->client_ip, sizeof(ws->client64));
            }
            else {
                apr_cpystrn(ws->client, val, sizeof(ws->client)); /* DEPRECATE */
                apr_cpystrn(ws->client64, val, sizeof(ws->client64));
            }
        }

        if (s) {
            if (c) {
                apr_snprintf(ws->vhost, sizeof(ws->vhost), "%s:%d",
                             s->server_hostname, c->local_addr->port);
            }
            else {
                apr_cpystrn(ws->vhost, s->server_hostname, sizeof(ws->vhost));
            }
        }
        else if (c) {
            ws->vhost[0]='\0';
        }

        if (c) {
            val = ap_get_protocol(c);
            apr_cpystrn(ws->protocol, val, sizeof(ws->protocol));
        }
    }

    return old_status;
}

AP_DECLARE(int) ap_update_child_status_from_indexes(int child_num,
                                                    int thread_num,
                                                    int status,
                                                    request_rec *r)
{
    if (child_num < 0) {
        return -1;
    }

    return update_child_status_internal(child_num, thread_num, status,
                                        r ? r->connection : NULL,
                                        r ? r->server : NULL,
                                        r, NULL);
}

AP_DECLARE(int) ap_update_child_status(ap_sb_handle_t *sbh, int status,
                                      request_rec *r)
{
    if (!sbh || (sbh->child_num < 0))
        return -1;

    return update_child_status_internal(sbh->child_num, sbh->thread_num,
                                        status,
                                        r ? r->connection : NULL,
                                        r ? r->server : NULL,
                                        r, NULL);
}

AP_DECLARE(int) ap_update_child_status_from_conn(ap_sb_handle_t *sbh, int status,
                                                 conn_rec *c)
{
    if (!sbh || (sbh->child_num < 0))
        return -1;

    return update_child_status_internal(sbh->child_num, sbh->thread_num,
                                        status, c, NULL, NULL, NULL);
}

AP_DECLARE(int) ap_update_child_status_from_server(ap_sb_handle_t *sbh, int status,
                                                   conn_rec *c, server_rec *s)
{
    if (!sbh || (sbh->child_num < 0))
        return -1;

    return update_child_status_internal(sbh->child_num, sbh->thread_num,
                                        status, c, s, NULL, NULL);
}

AP_DECLARE(int) ap_update_child_status_descr(ap_sb_handle_t *sbh, int status, const char *descr)
{
    if (!sbh || (sbh->child_num < 0))
        return -1;

    return update_child_status_internal(sbh->child_num, sbh->thread_num,
                                        status, NULL, NULL, NULL, descr);
}

AP_DECLARE(void) ap_time_process_request(ap_sb_handle_t *sbh, int status)
{
    worker_score *ws;

    if (!sbh)
        return;

    if (sbh->child_num < 0) {
        return;
    }

    ws = &ap_scoreboard_image->servers[sbh->child_num][sbh->thread_num];

    if (status == START_PREQUEST) {
        ws->start_time = ws->last_used = apr_time_now();
    }
    else if (status == STOP_PREQUEST) {
        ws->stop_time = ws->last_used = apr_time_now();
        if (ap_extended_status) {
            ws->duration += ws->stop_time - ws->start_time;
        }
    }
}

AP_DECLARE(void) ap_set_time_process_request(ap_sb_handle_t* const sbh,
  const apr_time_t timebeg,const apr_time_t timeend)
{
    worker_score *ws;
    if (!sbh || sbh->child_num < 0)
        return;

    ws = &ap_scoreboard_image->servers[sbh->child_num][sbh->thread_num];

    ws->start_time = timebeg;
    ws->stop_time = ws->last_used = timeend;

    if (ap_extended_status)
ws->duration += timeend - timebeg;
}

AP_DECLARE(int) ap_update_global_status(void)
{
#ifdef HAVE_TIMES
    if (ap_scoreboard_image == NULL) {
        return APR_SUCCESS;
    }
    times(&ap_scoreboard_image->global->times);
#endif
    return APR_SUCCESS;
}

AP_DECLARE(worker_score *) ap_get_scoreboard_worker_from_indexes(int x, int y)
{
    if (((x < 0) || (x >= server_limit)) ||
        ((y < 0) || (y >= thread_limit))) {
        return(NULL); /* Out of range */
    }
    return &ap_scoreboard_image->servers[x][y];
}

AP_DECLARE(worker_score *) ap_get_scoreboard_worker(ap_sb_handle_t *sbh)
{
    if (!sbh)
        return NULL;

    return ap_get_scoreboard_worker_from_indexes(sbh->child_num,
                                                 sbh->thread_num);
}

AP_DECLARE(void) ap_copy_scoreboard_worker(worker_score *dest,
                                           int child_num,
                                           int thread_num)
{
    worker_score *ws = ap_get_scoreboard_worker_from_indexes(child_num, thread_num);

    memcpy(dest, ws, sizeof *ws);

    /* For extra safety, NUL-terminate the strings returned, though it
     * should be true those last bytes are always zero anyway. */
    dest->client[sizeof(dest->client) - 1] = '\0';
    dest->client64[sizeof(dest->client64) - 1] = '\0';
    dest->request[sizeof(dest->request) - 1] = '\0';
    dest->vhost[sizeof(dest->vhost) - 1] = '\0';
    dest->protocol[sizeof(dest->protocol) - 1] = '\0';
}

AP_DECLARE(process_score *) ap_get_scoreboard_process(int x)
{
    if ((x < 0) || (x >= server_limit)) {
        return(NULL); /* Out of range */
    }
    return &ap_scoreboard_image->parent[x];
}

AP_DECLARE(global_score *) ap_get_scoreboard_global(void)
{
    return ap_scoreboard_image->global;
}

quality98%

¤ Dauer der Verarbeitung: 0.2 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.