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/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
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 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org,
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 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
 *                      Karl Heyes <karl@xiph.org>
 *                      and others (see AUTHORS for details).
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 * Copyright 2011,      Dave 'justdave' Miller <justdave@mozilla.com>.
 * Copyright 2011-2014, Thomas B. "dm8tbr" Ruecker <thomas@ruecker.fi>,
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 * Copyright 2011-2018, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
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 */

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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#ifndef _WIN32
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#include <fnmatch.h>
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#endif
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#include <libxml/xmlmemory.h>
#include <libxml/parser.h>

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#include "common/thread/thread.h"
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#include "cfgfile.h"
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#include "global.h"
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#include "logging.h"
#include "util.h"
#include "auth.h"
#include "event.h"
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#include "refobject.h"
#include "reportxml.h"
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/* for config_reread_config() */
#include "yp.h"
#include "fserve.h"
#include "stats.h"
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#include "connection.h"
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#include "main.h"
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#include "slave.h"
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#include "xslt.h"
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#define CATMODULE                       "CONFIG"
#define CONFIG_DEFAULT_LOCATION         "Earth"
#define CONFIG_DEFAULT_ADMIN            "icemaster@localhost"
#define CONFIG_DEFAULT_CLIENT_LIMIT     256
#define CONFIG_DEFAULT_SOURCE_LIMIT     16
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#define CONFIG_DEFAULT_QUEUE_SIZE_LIMIT (500*1024)
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#define CONFIG_DEFAULT_BODY_SIZE_LIMIT  (4*1024)
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#define CONFIG_DEFAULT_BURST_SIZE       (64*1024)
#define CONFIG_DEFAULT_THREADPOOL_SIZE  4
#define CONFIG_DEFAULT_CLIENT_TIMEOUT   30
#define CONFIG_DEFAULT_HEADER_TIMEOUT   15
#define CONFIG_DEFAULT_SOURCE_TIMEOUT   10
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#define CONFIG_DEFAULT_BODY_TIMEOUT     (10 + CONFIG_DEFAULT_HEADER_TIMEOUT)
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#define CONFIG_DEFAULT_MASTER_USERNAME  "relay"
#define CONFIG_DEFAULT_SHOUTCAST_MOUNT  "/stream"
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#define CONFIG_DEFAULT_SHOUTCAST_USER   "source"
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#define CONFIG_DEFAULT_FILESERVE        1
#define CONFIG_DEFAULT_TOUCH_FREQ       5
#define CONFIG_DEFAULT_HOSTNAME         "localhost"
#define CONFIG_DEFAULT_PLAYLIST_LOG     NULL
#define CONFIG_DEFAULT_ACCESS_LOG       "access.log"
#define CONFIG_DEFAULT_ERROR_LOG        "error.log"
#define CONFIG_DEFAULT_LOG_LEVEL        ICECAST_LOGLEVEL_INFO
#define CONFIG_DEFAULT_CHROOT           0
#define CONFIG_DEFAULT_CHUID            0
#define CONFIG_DEFAULT_USER             NULL
#define CONFIG_DEFAULT_GROUP            NULL
#define CONFIG_MASTER_UPDATE_INTERVAL   120
#define CONFIG_YP_URL_TIMEOUT           10
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#define CONFIG_DEFAULT_RELAY_SERVER     "127.0.0.1"
#define CONFIG_DEFAULT_RELAY_PORT       80
#define CONFIG_DEFAULT_RELAY_MOUNT      "/"
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#define CONFIG_DEFAULT_CIPHER_LIST      "ECDHE-ECDSA-CHACHA20-POLY1305:" \
                                        "ECDHE-RSA-CHACHA20-POLY1305:" \
                                        "ECDHE-ECDSA-AES128-GCM-SHA256:" \
                                        "ECDHE-RSA-AES128-GCM-SHA256:" \
                                        "ECDHE-ECDSA-AES256-GCM-SHA384:" \
                                        "ECDHE-RSA-AES256-GCM-SHA384:" \
                                        "DHE-RSA-AES128-GCM-SHA256:" \
                                        "DHE-RSA-AES256-GCM-SHA384:" \
                                        "ECDHE-ECDSA-AES128-SHA256:" \
                                        "ECDHE-RSA-AES128-SHA256:" \
                                        "ECDHE-ECDSA-AES128-SHA:" \
                                        "ECDHE-RSA-AES256-SHA384:" \
                                        "ECDHE-RSA-AES128-SHA:" \
                                        "ECDHE-ECDSA-AES256-SHA384:" \
                                        "ECDHE-ECDSA-AES256-SHA:" \
                                        "ECDHE-RSA-AES256-SHA:" \
                                        "DHE-RSA-AES128-SHA256:" \
                                        "DHE-RSA-AES128-SHA:" \
                                        "DHE-RSA-AES256-SHA256:" \
                                        "DHE-RSA-AES256-SHA:" \
                                        "ECDHE-ECDSA-DES-CBC3-SHA:" \
                                        "ECDHE-RSA-DES-CBC3-SHA:" \
                                        "EDH-RSA-DES-CBC3-SHA:" \
                                        "AES128-GCM-SHA256:" \
                                        "AES256-GCM-SHA384:" \
                                        "AES128-SHA256:" \
                                        "AES256-SHA256:" \
                                        "AES128-SHA:" \
                                        "AES256-SHA:" \
                                        "DES-CBC3-SHA:" \
                                        "!DSS:" \
                                        "!aNULL:!eNULL:" \
                                        "!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:" \
                                        "!EDH-DSS-DES-CBC3-SHA:" \
                                        "!EDH-RSA-DES-CBC3-SHA:" \
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                                        "!KRB5-DES-CBC3-SHA"
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#ifndef _WIN32
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#define CONFIG_DEFAULT_BASE_DIR         "/usr/local/icecast"
#define CONFIG_DEFAULT_LOG_DIR          "/usr/local/icecast/logs"
#define CONFIG_DEFAULT_WEBROOT_DIR      "/usr/local/icecast/webroot"
#define CONFIG_DEFAULT_ADMINROOT_DIR    "/usr/local/icecast/admin"
#define CONFIG_DEFAULT_NULL_FILE        "/dev/null"
#define MIMETYPESFILE                   "/etc/mime.types"
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#else
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#define CONFIG_DEFAULT_BASE_DIR         ".\\"
#define CONFIG_DEFAULT_LOG_DIR          ".\\logs"
#define CONFIG_DEFAULT_WEBROOT_DIR      ".\\webroot"
#define CONFIG_DEFAULT_ADMINROOT_DIR    ".\\admin"
#define CONFIG_DEFAULT_NULL_FILE        "nul:"
#define MIMETYPESFILE                   ".\\mime.types"
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#endif

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/* Legacy values. */
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#define CONFIG_LEGACY_ALL_METHODS           "get,options"

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#define CONFIG_LEGACY_SOURCE_NAME_GLOBAL    "legacy-global-source"
#define CONFIG_LEGACY_SOURCE_NAME_MOUNT     "legacy-mount-source"
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#define CONFIG_LEGACY_SOURCE_METHODS        CONFIG_LEGACY_ALL_METHODS ",post,source,put,delete"
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#define CONFIG_LEGACY_SOURCE_ALLOW_WEB      0
#define CONFIG_LEGACY_SOURCE_ALLOW_ADMIN    "*"

#define CONFIG_LEGACY_ADMIN_NAME            "legacy-admin"
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#define CONFIG_LEGACY_ADMIN_METHODS         CONFIG_LEGACY_ALL_METHODS ",post,head,stats,delete"
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#define CONFIG_LEGACY_ADMIN_ALLOW_WEB       1
#define CONFIG_LEGACY_ADMIN_ALLOW_ADMIN     "*"

#define CONFIG_LEGACY_RELAY_NAME            "legacy-relay"
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#define CONFIG_LEGACY_RELAY_METHODS         CONFIG_LEGACY_ALL_METHODS
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#define CONFIG_LEGACY_RELAY_ALLOW_WEB       1
#define CONFIG_LEGACY_RELAY_ALLOW_ADMIN     "streamlist.txt"

#define CONFIG_LEGACY_ANONYMOUS_NAME        "anonymous"
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#define CONFIG_LEGACY_ANONYMOUS_METHODS     CONFIG_LEGACY_ALL_METHODS ",post,head"
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#define CONFIG_LEGACY_ANONYMOUS_ALLOW_WEB   1
#define CONFIG_LEGACY_ANONYMOUS_ALLOW_ADMIN NULL

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static ice_config_t _current_configuration;
static ice_config_locks _locks;

static void _set_defaults(ice_config_t *c);
static void _parse_root(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
static void _parse_limits(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
static void _parse_directory(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
static void _parse_paths(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
static void _parse_logging(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
static void _parse_security(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
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static void _parse_authentication(xmlDocPtr                 doc,
                                  xmlNodePtr                node,
                                  ice_config_t             *c,
                                  char                    **source_password);

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static void _parse_relay(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c, const char *mount);
static void _parse_mount(xmlDocPtr doc, xmlNodePtr parentnode, ice_config_t *c);
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static void _parse_listen_socket(xmlDocPtr                  doc,
                                 xmlNodePtr                 node,
                                 ice_config_t              *c);

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static void _add_server(xmlDocPtr doc, xmlNodePtr node, ice_config_t *c);
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static void _parse_events(event_registration_t **events, xmlNodePtr node);
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static void merge_mounts(mount_proxy * dst, mount_proxy * src);
static inline void _merge_mounts_all(ice_config_t *c);

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operation_mode config_str_to_omode(const char *str)
{
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    if (!str || !*str)
        return OMODE_DEFAULT;
    if (strcasecmp(str, "default") == 0) {
        return OMODE_DEFAULT;
    } else if (strcasecmp(str, "normal") == 0) {
        return OMODE_NORMAL;
    } else if (strcasecmp(str, "legacy-compat") == 0 || strcasecmp(str, "legacy") == 0) {
        return OMODE_LEGACY;
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    } else if (strcasecmp(str, "strict") == 0) {
        return OMODE_STRICT;
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    } else {
        ICECAST_LOG_ERROR("Unknown operation mode \"%s\", falling back to DEFAULT.", str);
        return OMODE_DEFAULT;
    }
}

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static listener_type_t config_str_to_listener_type(const char *str)
{
    if (!str || !*str) {
        return LISTENER_TYPE_NORMAL;
    } else if (strcasecmp(str, "normal") == 0) {
        return LISTENER_TYPE_NORMAL;
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    } else if (strcasecmp(str, "virtual") == 0) {
        return LISTENER_TYPE_VIRTUAL;
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    } else {
        ICECAST_LOG_ERROR("Unknown listener type \"%s\", falling back to NORMAL.", str);
        return LISTENER_TYPE_NORMAL;
    }
}

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char * config_href_to_id(const char *href)
{
    if (!href || !*href)
        return NULL;

    if (*href != '#') {
        ICECAST_LOG_ERROR("Can not convert string \"%H\" to ID.", href);
        return NULL;
    }

    return strdup(href+1);
}

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static void create_locks(void)
{
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    thread_mutex_create(&_locks.relay_lock);
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    thread_rwlock_create(&_locks.config_lock);
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}

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static void release_locks(void)
{
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    thread_mutex_destroy(&_locks.relay_lock);
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    thread_rwlock_destroy(&_locks.config_lock);
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}

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void config_initialize(void)
{
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    create_locks();
}

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void config_shutdown(void)
{
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    config_get_config();
    config_clear(&_current_configuration);
    config_release_config();
    release_locks();
}

void config_init_configuration(ice_config_t *configuration)
{
    memset(configuration, 0, sizeof(ice_config_t));
    _set_defaults(configuration);
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    configuration->reportxml_db = refobject_new(reportxml_database_t);
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}

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static inline void __read_int(xmlDocPtr doc, xmlNodePtr node, int *val, const char *warning)
{
    char *str = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
    if (!str || !*str) {
        ICECAST_LOG_WARN("%s", warning);
    } else {
        *val = util_str_to_int(str, *val);
    }
    if (str)
        xmlFree(str);
}

static inline void __read_unsigned_int(xmlDocPtr doc, xmlNodePtr node, unsigned int *val, const char *warning)
{
    char *str = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
    if (!str || !*str) {
        ICECAST_LOG_WARN("%s", warning);
    } else {
        *val = util_str_to_unsigned_int(str, *val);
    }
    if (str)
        xmlFree(str);
}         

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static inline int __parse_public(const char *str)
{
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    /* values that are not bool */
    if (strcasecmp(str, "client") == 0)
        return -1;

    /* old way of doing so */
    if (strcmp(str, "-1") == 0)
        return -1;

    /* ok, only normal bool left! */
    return util_str_to_bool(str);
}

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/* This converts TLS mode strings to (tlsmode_t).
 * In older versions of Icecast2 this was just a bool.
 * So we need to handle boolean values as well.
 * See also: util_str_to_bool().
 */
static tlsmode_t str_to_tlsmode(const char *str) {
    /* consider NULL and empty strings as auto mode */
    if (!str || !*str)
        return ICECAST_TLSMODE_AUTO;

    if (strcasecmp(str, "disabled") == 0) {
        return ICECAST_TLSMODE_DISABLED;
    } else if (strcasecmp(str, "auto") == 0) {
        return ICECAST_TLSMODE_AUTO;
    } else if (strcasecmp(str, "auto_no_plain") == 0) {
        return ICECAST_TLSMODE_AUTO_NO_PLAIN;
    } else if (strcasecmp(str, "rfc2817") == 0) {
        return ICECAST_TLSMODE_RFC2817;
    } else if (strcasecmp(str, "rfc2818") == 0 ||
               /* boolean-style values */
               strcasecmp(str, "true") == 0 ||
               strcasecmp(str, "yes")  == 0 ||
               strcasecmp(str, "on")   == 0 ) {
        return ICECAST_TLSMODE_RFC2818;
    }

    /* old style numbers: consider everyting non-zero RFC2818 */
    if (atoi(str))
        return ICECAST_TLSMODE_RFC2818;

    /* we default to auto mode */
    return ICECAST_TLSMODE_AUTO;
}

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/* This checks for the TLS implementation of a node */
static int __check_node_impl(xmlNodePtr node, const char *def)
{
    char *impl;
    int res;

    impl = (char *)xmlGetProp(node, XMLSTR("implementation"));
    if (!impl)
        impl = (char *)xmlGetProp(node, XMLSTR("impl"));
    if (!impl)
        impl = (char *)xmlStrdup(XMLSTR(def));

    res = tls_check_impl(impl);

    xmlFree(impl);

    return res;
}


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static void __append_old_style_auth(auth_stack_t       **stack,
                                    const char          *name,
                                    const char          *type,
                                    const char          *username,
                                    const char          *password,
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                                    const char          *match_method,
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                                    const char          *allow_method,
                                    int                  allow_web,
                                    const char          *allow_admin)
{
    xmlNodePtr  role,
                user,
                pass;
    auth_t     *auth;
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    if (!type)
        return;

    role = xmlNewNode(NULL, XMLSTR("role"));

    xmlSetProp(role, XMLSTR("type"), XMLSTR(type));
    xmlSetProp(role, XMLSTR("deny-method"), XMLSTR("*"));
    if (allow_method)
        xmlSetProp(role, XMLSTR("allow-method"), XMLSTR(allow_method));

    if (name)
        xmlSetProp(role, XMLSTR("name"), XMLSTR(name));

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    if (match_method)
        xmlSetProp(role, XMLSTR("match-method"), XMLSTR(match_method));
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    if (allow_web) {
        xmlSetProp(role, XMLSTR("allow-web"), XMLSTR("*"));
    } else {
        xmlSetProp(role, XMLSTR("deny-web"), XMLSTR("*"));
    }

    if (allow_admin && strcmp(allow_admin, "*") == 0) {
        xmlSetProp(role, XMLSTR("allow-admin"), XMLSTR("*"));
    } else {
        xmlSetProp(role, XMLSTR("deny-admin"), XMLSTR("*"));
        if (allow_admin)
            xmlSetProp(role, XMLSTR("allow-admin"), XMLSTR(allow_admin));
    }

    if (username) {
        user = xmlNewChild(role, NULL, XMLSTR("option"), NULL);
        xmlSetProp(user, XMLSTR("name"), XMLSTR("username"));
        xmlSetProp(user, XMLSTR("value"), XMLSTR(username));
    }
    if (password) {
        pass = xmlNewChild(role, NULL, XMLSTR("option"), NULL);
        xmlSetProp(pass, XMLSTR("name"), XMLSTR("password"));
        xmlSetProp(pass, XMLSTR("value"), XMLSTR(password));
    }

    auth = auth_get_authenticator(role);
    auth_stack_push(stack, auth);
    auth_release(auth);

    xmlFreeNode(role);
}

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static void __append_option_tag(xmlNodePtr  parent,
                                const char *name,
                                const char *value)
{
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    xmlNodePtr node;

    if (!name || !value)
        return;

    node = xmlNewChild(parent, NULL, XMLSTR("option"), NULL);
    xmlSetProp(node, XMLSTR("name"), XMLSTR(name));
    xmlSetProp(node, XMLSTR("value"), XMLSTR(value));
}

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static void __append_old_style_urlauth(auth_stack_t **stack,
                                       const char    *client_add,
                                       const char    *client_remove,
                                       const char    *action_add,
                                       const char    *action_remove,
                                       const char    *username,
                                       const char    *password,
                                       int            is_source,
                                       const char    *auth_header,
                                       const char    *timelimit_header,
                                       const char    *headers,
                                       const char    *header_prefix)
{
    xmlNodePtr   role;
    auth_t      *auth;
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    if (!stack || (!client_add && !client_remove))
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        return;

    role = xmlNewNode(NULL, XMLSTR("role"));

    xmlSetProp(role, XMLSTR("type"), XMLSTR("url"));

    if (is_source) {
        xmlSetProp(role, XMLSTR("method"), XMLSTR("source,put"));
        xmlSetProp(role, XMLSTR("deny-method"), XMLSTR("*"));
        xmlSetProp(role, XMLSTR("allow-method"), XMLSTR("source,put"));
        xmlSetProp(role, XMLSTR("allow-web"), XMLSTR("*"));
        xmlSetProp(role, XMLSTR("allow-admin"), XMLSTR("*"));
    } else {
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        xmlSetProp(role, XMLSTR("method"), XMLSTR("get,post,head,options"));
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        xmlSetProp(role, XMLSTR("deny-method"), XMLSTR("*"));
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        xmlSetProp(role, XMLSTR("allow-method"), XMLSTR("get,post,head,options"));
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        xmlSetProp(role, XMLSTR("allow-web"), XMLSTR("*"));
        xmlSetProp(role, XMLSTR("deny-admin"), XMLSTR("*"));
    }

    __append_option_tag(role, "client_add", client_add);
    __append_option_tag(role, "client_remove", client_remove);
    __append_option_tag(role, "action_add", action_add);
    __append_option_tag(role, "action_remove", action_remove);
    __append_option_tag(role, "username", username);
    __append_option_tag(role, "password", password);
    __append_option_tag(role, "auth_header", auth_header);
    __append_option_tag(role, "timelimit_header", timelimit_header);
    __append_option_tag(role, "headers", headers);
    __append_option_tag(role, "header_prefix", header_prefix);

    auth = auth_get_authenticator(role);
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    if (auth) {
        auth_stack_push(stack, auth);
        auth_release(auth);
        ICECAST_LOG_DEBUG("Pushed authenticator %p on stack %p.", auth, stack);
    } else {
        ICECAST_LOG_DEBUG("Failed to set up authenticator.");
    }
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    xmlFreeNode(role);
}

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static void __append_old_style_exec_event(event_registration_t **list,
                                          const char            *trigger,
                                          const char            *executable)
{
    xmlNodePtr            exec;
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    event_registration_t *er;

    exec = xmlNewNode(NULL, XMLSTR("event"));

    xmlSetProp(exec, XMLSTR("type"), XMLSTR("exec"));
    xmlSetProp(exec, XMLSTR("trigger"), XMLSTR(trigger));

    __append_option_tag(exec, "executable", executable);

    er = event_new_from_xml_node(exec);
    event_registration_push(list, er);
    event_registration_release(er);

    xmlFreeNode(exec);
}

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static void __append_old_style_url_event(event_registration_t   **list,
                                         const char              *trigger,
                                         const char              *url,
                                         const char              *action,
                                         const char              *username,
                                         const char              *password)
{
    xmlNodePtr            exec;
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    event_registration_t *er;

    exec = xmlNewNode(NULL, XMLSTR("event"));

    xmlSetProp(exec, XMLSTR("type"), XMLSTR("url"));
    xmlSetProp(exec, XMLSTR("trigger"), XMLSTR(trigger));

    __append_option_tag(exec, "url", url);
    __append_option_tag(exec, "action", action);
    __append_option_tag(exec, "username", username);
    __append_option_tag(exec, "password", password);

    er = event_new_from_xml_node(exec);
    event_registration_push(list, er);
    event_registration_release(er);

    xmlFreeNode(exec);
}

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void config_clear_http_header(ice_config_http_header_t *header)
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{
    ice_config_http_header_t *old;
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    while (header) {
        xmlFree(header->name);
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        if (header->value)
            xmlFree(header->value);
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        old = header;
        header = header->next;
        free(old);
    }
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}

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static inline ice_config_http_header_t *config_copy_http_header(ice_config_http_header_t *header)
{
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    ice_config_http_header_t *ret = NULL;
    ice_config_http_header_t *cur = NULL;
    ice_config_http_header_t *old = NULL;

    while (header) {
        if (cur) {
            cur->next = calloc(1, sizeof(ice_config_http_header_t));
            old = cur;
            cur = cur->next;
        } else {
            ret = calloc(1, sizeof(ice_config_http_header_t));
            cur = ret;
        }

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        if (!cur)
            return ret; /* TODO: do better error handling */
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        cur->type   = header->type;
        cur->name   = (char *)xmlCharStrdup(header->name);
        cur->value  = (char *)xmlCharStrdup(header->value);
        cur->status = header->status;
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        if (!cur->name || !cur->value) {
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            if (cur->name)
                xmlFree(cur->name);
            if (cur->value)
                xmlFree(cur->value);
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            if (old) {
                old->next = NULL;
            } else {
                ret = NULL;
            }
            free(cur);
            return ret;
        }
        header = header->next;
    }
    return ret;
}

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static void config_clear_mount(mount_proxy *mount)
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{
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    if (mount->mountname)           xmlFree(mount->mountname);
    if (mount->dumpfile)            xmlFree(mount->dumpfile);
    if (mount->intro_filename)      xmlFree(mount->intro_filename);
    if (mount->fallback_mount)      xmlFree(mount->fallback_mount);
    if (mount->stream_name)         xmlFree(mount->stream_name);
    if (mount->stream_description)  xmlFree(mount->stream_description);
    if (mount->stream_url)          xmlFree(mount->stream_url);
    if (mount->stream_genre)        xmlFree(mount->stream_genre);
    if (mount->bitrate)             xmlFree(mount->bitrate);
    if (mount->type)                xmlFree(mount->type);
    if (mount->charset)             xmlFree(mount->charset);
    if (mount->cluster_password)    xmlFree(mount->cluster_password);
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    if (mount->authstack)           auth_stack_release(mount->authstack);
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    event_registration_release(mount->event);
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    config_clear_http_header(mount->http_headers);
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    free(mount);
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}

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static void config_clear_resource(resource_t *resource)
{
    resource_t *nextresource;

    while (resource) {
        nextresource = resource->next;
        xmlFree(resource->source);
        xmlFree(resource->destination);
        xmlFree(resource->bind_address);
        xmlFree(resource->vhost);
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        xmlFree(resource->module);
        xmlFree(resource->handler);
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        free(resource->listen_socket);
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        free(resource);
        resource = nextresource;
    }
}

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listener_t *config_clear_listener(listener_t *listener)
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{
    listener_t *next = NULL;
    if (listener)
    {
        next = listener->next;
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        if (listener->id)               xmlFree(listener->id);
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        if (listener->on_behalf_of)     free(listener->on_behalf_of);
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        if (listener->bind_address)     xmlFree(listener->bind_address);
        if (listener->shoutcast_mount)  xmlFree(listener->shoutcast_mount);
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        if (listener->authstack)        auth_stack_release(listener->authstack);
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        free (listener);
    }
    return next;
}
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void config_clear(ice_config_t *c)
{
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    ice_config_dir_t    *dirnode,
                        *nextdirnode;
    mount_proxy         *mount,
                        *nextmount;
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    size_t              i;
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    free(c->config_filename);
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    xmlFree(c->server_id);
    if (c->location)        xmlFree(c->location);
    if (c->admin)           xmlFree(c->admin);
    if (c->hostname)        xmlFree(c->hostname);
    if (c->base_dir)        xmlFree(c->base_dir);
    if (c->log_dir)         xmlFree(c->log_dir);
    if (c->webroot_dir)     xmlFree(c->webroot_dir);
    if (c->adminroot_dir)   xmlFree(c->adminroot_dir);
    if (c->null_device)     xmlFree(c->null_device);
    if (c->pidfile)         xmlFree(c->pidfile);
    if (c->banfile)         xmlFree(c->banfile);
    if (c->allowfile)       xmlFree(c->allowfile);
    if (c->playlist_log)    xmlFree(c->playlist_log);
    if (c->access_log)      xmlFree(c->access_log);
    if (c->error_log)       xmlFree(c->error_log);
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    if (c->shoutcast_mount) xmlFree(c->shoutcast_mount);
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    if (c->shoutcast_user)  xmlFree(c->shoutcast_user);
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    if (c->authstack)       auth_stack_release(c->authstack);
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    if (c->master_server)   xmlFree(c->master_server);
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    if (c->master_username) xmlFree(c->master_username);
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    if (c->master_password) xmlFree(c->master_password);
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    if (c->user)            xmlFree(c->user);
    if (c->group)           xmlFree(c->group);
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    if (c->mimetypes_fn)    xmlFree(c->mimetypes_fn);
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    if (c->tls_context.cert_file)       xmlFree(c->tls_context.cert_file);
    if (c->tls_context.key_file)        xmlFree(c->tls_context.key_file);
    if (c->tls_context.cipher_list)     xmlFree(c->tls_context.cipher_list);

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    event_registration_release(c->event);

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    while ((c->listen_sock = config_clear_listener(c->listen_sock)));
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    thread_mutex_lock(&(_locks.relay_lock));
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    for (i = 0; i < c->relay_length; i++) {
        relay_config_free(c->relay[i]);
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    }
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    free(c->relay);
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    thread_mutex_unlock(&(_locks.relay_lock));

    mount = c->mounts;
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    while (mount) {
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        nextmount = mount->next;
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        config_clear_mount(mount);
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        mount = nextmount;
    }

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    config_clear_resource(c->resources);
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    dirnode = c->dir_list;
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    while (dirnode) {
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        nextdirnode = dirnode->next;
        xmlFree(dirnode->host);
        free(dirnode);
        dirnode = nextdirnode;
    }
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#ifdef USE_YP
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    for (i = 0; i < c->num_yp_directories; i++) {
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        xmlFree(c->yp_url[i]);
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    }
#endif
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    config_clear_http_header(c->http_headers);
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    refobject_unref(c->reportxml_db);

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    memset(c, 0, sizeof(ice_config_t));
}

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void config_reread_config(void)
{
    int           ret;
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    ice_config_t *config;
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    ice_config_t  new_config;
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    /* reread config file */

    config = config_grab_config(); /* Both to get the lock, and to be able
                                     to find out the config filename */
    xmlSetGenericErrorFunc("config", log_parse_failure);
    ret = config_parse_file(config->config_filename, &new_config);
    if(ret < 0) {
        ICECAST_LOG_ERROR("Error parsing config, not replacing existing config");
        switch (ret) {
            case CONFIG_EINSANE:
                ICECAST_LOG_ERROR("Config filename null or blank");
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            break;
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            case CONFIG_ENOROOT:
                ICECAST_LOG_ERROR("Root element not found in %s", config->config_filename);
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            break;
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            case CONFIG_EBADROOT:
                ICECAST_LOG_ERROR("Not an icecast2 config file: %s",
                        config->config_filename);
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            break;
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            default:
                ICECAST_LOG_ERROR("Parse error in reading %s", config->config_filename);
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            break;
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        }
        config_release_config();
    } else {
        config_clear(config);
        config_set_config(&new_config);
        config = config_get_config_unlocked();
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        restart_logging(config);
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        main_config_reload(config);
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        connection_reread_config(config);
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        yp_recheck_config(config);
        fserve_recheck_mime_types(config);
        stats_global(config);
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        config_release_config();
        slave_update_all_mounts();
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        xslt_clear_cache();
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    }
}

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int config_initial_parse_file(const char *filename)
{
    /* Since we're already pointing at it, we don't need to copy it in place */
    return config_parse_file(filename, &_current_configuration);
}

int config_parse_file(const char *filename, ice_config_t *configuration)
{
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    xmlDocPtr  doc;
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    xmlNodePtr node;

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    if (filename == NULL || strcmp(filename, "") == 0)
        return CONFIG_EINSANE;
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    doc = xmlParseFile(filename);
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    if (doc == NULL)
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        return CONFIG_EPARSE;
    node = xmlDocGetRootElement(doc);
    if (node == NULL) {
        xmlFreeDoc(doc);
        return CONFIG_ENOROOT;
    }

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    if (xmlStrcmp(node->name, XMLSTR("icecast")) != 0) {
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        xmlFreeDoc(doc);
        return CONFIG_EBADROOT;
    }

    config_init_configuration(configuration);
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    configuration->config_filename = strdup(filename);
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    _parse_root(doc, node->xmlChildrenNode, configuration);
    xmlFreeDoc(doc);
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    _merge_mounts_all(configuration);
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    return 0;
}

int config_parse_cmdline(int arg, char **argv)
{
    return 0;
}

ice_config_locks *config_locks(void)
{
    return &_locks;
}

void config_release_config(void)
{
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    thread_rwlock_unlock(&(_locks.config_lock));
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}

ice_config_t *config_get_config(void)
{
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    thread_rwlock_rlock(&(_locks.config_lock));
    return &_current_configuration;
}

ice_config_t *config_grab_config(void)
{
    thread_rwlock_wlock(&(_locks.config_lock));
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    return &_current_configuration;
}

/* MUST be called with the lock held! */
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void config_set_config(ice_config_t *config)
{
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    memcpy(&_current_configuration, config, sizeof(ice_config_t));
}

ice_config_t *config_get_config_unlocked(void)
{
    return &_current_configuration;
}

static void _set_defaults(ice_config_t *configuration)
{
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    configuration
        ->location = (char *) xmlCharStrdup(CONFIG_DEFAULT_LOCATION);
    configuration
        ->server_id = (char *) xmlCharStrdup(ICECAST_VERSION_STRING);
    configuration
        ->admin = (char *) xmlCharStrdup(CONFIG_DEFAULT_ADMIN);
    configuration
        ->client_limit = CONFIG_DEFAULT_CLIENT_LIMIT;
    configuration
        ->source_limit = CONFIG_DEFAULT_SOURCE_LIMIT;
    configuration
        ->queue_size_limit = CONFIG_DEFAULT_QUEUE_SIZE_LIMIT;
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    configuration
        ->body_size_limit = CONFIG_DEFAULT_BODY_SIZE_LIMIT;
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    configuration
        ->client_timeout = CONFIG_DEFAULT_CLIENT_TIMEOUT;
    configuration
        ->header_timeout = CONFIG_DEFAULT_HEADER_TIMEOUT;
    configuration
        ->source_timeout = CONFIG_DEFAULT_SOURCE_TIMEOUT;
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    configuration
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        ->body_timeout = CONFIG_DEFAULT_BODY_TIMEOUT;
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    configuration
        ->shoutcast_mount = (char *) xmlCharStrdup(CONFIG_DEFAULT_SHOUTCAST_MOUNT);
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    configuration
        ->shoutcast_user = (char *) xmlCharStrdup(CONFIG_DEFAULT_SHOUTCAST_USER);
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    configuration
        ->fileserve  = CONFIG_DEFAULT_FILESERVE;
    configuration
        ->touch_interval = CONFIG_DEFAULT_TOUCH_FREQ;
    configuration
        ->on_demand = 0;
    configuration
        ->dir_list = NULL;
    configuration
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        ->hostname = (char *) xmlCharStrdup(CONFIG_DEFAULT_HOSTNAME);
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    configuration
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        ->mimetypes_fn = (char *) xmlCharStrdup(MIMETYPESFILE);
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    configuration
        ->master_server = NULL;
    configuration
        ->master_server_port = 0;
    configuration
        ->master_update_interval = CONFIG_MASTER_UPDATE_INTERVAL;
    configuration
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        ->master_username = (char *) xmlCharStrdup(CONFIG_DEFAULT_MASTER_USERNAME);
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    configuration
        ->master_password = NULL;
    configuration
        ->base_dir = (char *) xmlCharStrdup(CONFIG_DEFAULT_BASE_DIR);
    configuration
        ->log_dir = (char *) xmlCharStrdup(CONFIG_DEFAULT_LOG_DIR);
    configuration
        ->null_device = (char *) xmlCharStrdup(CONFIG_DEFAULT_NULL_FILE);
    configuration
        ->webroot_dir = (char *) xmlCharStrdup(CONFIG_DEFAULT_WEBROOT_DIR);
    configuration
        ->adminroot_dir = (char *) xmlCharStrdup(CONFIG_DEFAULT_ADMINROOT_DIR);
    configuration
        ->playlist_log = (char *) xmlCharStrdup(CONFIG_DEFAULT_PLAYLIST_LOG);
    configuration
        ->access_log = (char *) xmlCharStrdup(CONFIG_DEFAULT_ACCESS_LOG);
    configuration
        ->error_log = (char *) xmlCharStrdup(CONFIG_DEFAULT_ERROR_LOG);
    configuration
        ->loglevel = CONFIG_DEFAULT_LOG_LEVEL;
    configuration
        ->chroot = CONFIG_DEFAULT_CHROOT;
    configuration
        ->chuid = CONFIG_DEFAULT_CHUID;
    configuration
        ->user = NULL;
    configuration
        ->group = NULL;
    configuration
        ->num_yp_directories = 0;
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    /* default to a typical prebuffer size used by clients */
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    configuration
        ->burst_size = CONFIG_DEFAULT_BURST_SIZE;
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    configuration->tls_context
        .cipher_list = (char *) xmlCharStrdup(CONFIG_DEFAULT_CIPHER_LIST);
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}

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static inline void __check_hostname(ice_config_t *configuration)
{
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    char *p;

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    /* ensure we have a non-NULL buffer: */
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    if (!configuration->hostname)
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        configuration->hostname = (char *)xmlCharStrdup(CONFIG_DEFAULT_HOSTNAME);
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    /* convert to lower case: */
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    for (p = configuration->hostname; *p; p++) {
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        if ( *p >= 'A' && *p <= 'Z' )
            *p += 'a' - 'A';
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    }
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    configuration->sane_hostname = 0;
    switch (util_hostcheck(configuration->hostname)) {
        case HOSTCHECK_SANE:
            configuration->sane_hostname = 1;
        break;
        case HOSTCHECK_ERROR:
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            ICECAST_LOG_ERROR("Can not check hostname \"%s\".",
                configuration->hostname);
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        break;
        case HOSTCHECK_NOT_FQDN:
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            ICECAST_LOG_WARN("Warning, <hostname> seems not to be set to a "
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                "fully qualified domain name (FQDN). This may cause problems, "
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                "e.g. with YP directory listings.");
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        break;
        case HOSTCHECK_IS_LOCALHOST:
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            ICECAST_LOG_WARN("Warning, <hostname> not configured, using "
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                "default value \"%s\". This will cause problems, e.g. "
                "this breaks YP directory listings. YP directory listing "
                "support will be disabled.", CONFIG_DEFAULT_HOSTNAME);
                /* FIXME actually disable YP */
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        break;
        case HOSTCHECK_IS_IPV4:
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            ICECAST_LOG_WARN("Warning, <hostname> seems to be set to an IPv4 "
                "address. This may cause problems, e.g. with YP directory "
                "listings.");
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        break;
        case HOSTCHECK_IS_IPV6:
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            ICECAST_LOG_WARN("Warning, <hostname> seems to be set to an IPv6 "
                "address. This may cause problems, e.g. with YP directory "
                "listings.");
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        break;
        case HOSTCHECK_BADCHAR:
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            ICECAST_LOG_WARN("Warning, <hostname> contains unusual "
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                "characters. This may cause problems, e.g. with YP directory "
                "listings.");
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        break;
    }
}

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static void _parse_root(xmlDocPtr       doc,
                        xmlNodePtr      node,
                        ice_config_t   *configuration)
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{
    char *tmp;
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    char *source_password = NULL;
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    configuration
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        ->listen_sock       = calloc(1, sizeof(*configuration->listen_sock));
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    configuration
        ->listen_sock->port = 8000;
    configuration
        ->listen_sock_count = 1;
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    do {
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        if (node == NULL)
            break;
        if (xmlIsBlankNode(node))
            continue;
        if (xmlStrcmp(node->name, XMLSTR("location")) == 0) {
            if (configuration->location)
                xmlFree(configuration->location);
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            configuration->location = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("admin")) == 0) {
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            if (configuration->admin)
                xmlFree(configuration->admin);
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            configuration->admin = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("server-id")) == 0) {
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            xmlFree(configuration->server_id);
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            configuration->server_id = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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            ICECAST_LOG_WARN("Warning, server version string override "
                "detected. This may lead to unexpected client software "
                "behavior.");
        } else if (xmlStrcmp(node->name, XMLSTR("authentication")) == 0) {
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            _parse_authentication(doc, node->xmlChildrenNode, configuration, &source_password);
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        } else if (xmlStrcmp(node->name, XMLSTR("source-password")) == 0) {
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            /* TODO: This is the backwards-compatibility location */
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            ICECAST_LOG_WARN("<source-password> defined outside "
                "<authentication>. This is deprecated and will be removed in "
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                "version 2.X.0");
	    /* FIXME Settle target version for removal of this functionality! */
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            if (source_password)
                xmlFree(source_password);
            source_password = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("icelogin")) == 0) {
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            ICECAST_LOG_ERROR("<icelogin> support has been removed.");
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        } else if (xmlStrcmp(node->name, XMLSTR("fileserve")) == 0) {
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            tmp = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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            configuration->fileserve = util_str_to_bool(tmp);
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            if (tmp)
                xmlFree(tmp);
        } else if (xmlStrcmp(node->name, XMLSTR("relays-on-demand")) == 0) {
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            tmp = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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            configuration->on_demand = util_str_to_bool(tmp);
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            if (tmp)
                xmlFree(tmp);
        } else if (xmlStrcmp(node->name, XMLSTR("hostname")) == 0) {
            if (configuration->hostname)
                xmlFree(configuration->hostname);
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            configuration->hostname = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("mime-types")) == 0) {
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            ICECAST_LOG_WARN("<mime-types> has been moved into <paths>. Please update your configuration file.");
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            if (configuration->mimetypes_fn)
                xmlFree(configuration->mimetypes_fn);
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            configuration->mimetypes_fn = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("listen-socket")) == 0) {
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            _parse_listen_socket(doc, node, configuration);
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        } else if (xmlStrcmp(node->name, XMLSTR("port")) == 0) {
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            tmp = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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            if (tmp && *tmp) {
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                configuration->port = atoi(tmp);
                configuration->listen_sock->port = atoi(tmp);
                xmlFree(tmp);
            } else {
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                ICECAST_LOG_WARN("<port> setting must not be empty.");
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            }
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        } else if (xmlStrcmp(node->name, XMLSTR("bind-address")) == 0) {
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            if (configuration->listen_sock->bind_address)
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                xmlFree(configuration->listen_sock->bind_address);
            configuration->listen_sock->bind_address = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("master-server")) == 0) {
            if (configuration->master_server)
                xmlFree(configuration->master_server);
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            configuration->master_server = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("master-username")) == 0) {
            if (configuration->master_username)
                xmlFree(configuration->master_username);
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            configuration->master_username = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("master-password")) == 0) {
            if (configuration->master_password)
                xmlFree(configuration->master_password);
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            configuration->master_password = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("master-server-port")) == 0) {
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            __read_int(doc, node, &configuration->master_server_port, "<master-server-port> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("master-update-interval")) == 0) {
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            __read_int(doc, node, &configuration->master_update_interval, "<master-update-interval> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("shoutcast-mount")) == 0) {
            if (configuration->shoutcast_mount)
                xmlFree(configuration->shoutcast_mount);
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            configuration->shoutcast_mount = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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        } else if (xmlStrcmp(node->name, XMLSTR("limits")) == 0) {
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            _parse_limits(doc, node->xmlChildrenNode, configuration);
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        } else if (xmlStrcmp(node->name, XMLSTR("http-headers")) == 0) {
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            config_parse_http_headers(node->xmlChildrenNode, &(configuration->http_headers));
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        } else if (xmlStrcmp(node->name, XMLSTR("relay")) == 0) {
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            _parse_relay(doc, node->xmlChildrenNode, configuration, NULL);
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        } else if (xmlStrcmp(node->name, XMLSTR("mount")) == 0) {
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            _parse_mount(doc, node, configuration);
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        } else if (xmlStrcmp(node->name, XMLSTR("directory")) == 0) {
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            _parse_directory(doc, node->xmlChildrenNode, configuration);
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        } else if (xmlStrcmp(node->name, XMLSTR("paths")) == 0) {
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            _parse_paths(doc, node->xmlChildrenNode, configuration);
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        } else if (xmlStrcmp(node->name, XMLSTR("logging")) == 0) {
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            _parse_logging(doc, node->xmlChildrenNode, configuration);
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        } else if (xmlStrcmp(node->name, XMLSTR("security")) == 0) {
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            _parse_security(doc, node->xmlChildrenNode, configuration);
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        } else if (xmlStrcmp(node->name, XMLSTR("event-bindings")) == 0 ||
                   xmlStrcmp(node->name, XMLSTR("kartoffelsalat")) == 0) {
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            _parse_events(&configuration->event, node->xmlChildrenNode);
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        }
    } while ((node = node->next));
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    /* global source password is set.
     * We need to set it on default mount.
     * If default mount has a authstack not NULL we don't need to do anything.
     */
    if (source_password) {
        mount_proxy *mount = config_find_mount(configuration, NULL, MOUNT_TYPE_DEFAULT);
        if (!mount) {
            /* create a default mount here */
            xmlNodePtr node;
            node = xmlNewNode(NULL, XMLSTR("mount"));
            xmlSetProp(node, XMLSTR("type"), XMLSTR("default"));
            _parse_mount(doc, node, configuration);
            xmlFreeNode(node);
            mount = config_find_mount(configuration, NULL, MOUNT_TYPE_DEFAULT);
        }
        if (mount) {
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            if (!mount->authstack) {
                __append_old_style_auth(&mount->authstack,
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                                        CONFIG_LEGACY_SOURCE_NAME_GLOBAL,
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                                        AUTH_TYPE_STATIC, "source",
                                        source_password, NULL,
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                                        CONFIG_LEGACY_SOURCE_METHODS, CONFIG_LEGACY_SOURCE_ALLOW_WEB, CONFIG_LEGACY_SOURCE_ALLOW_ADMIN);
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            }
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        } else {
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            ICECAST_LOG_ERROR("Can not find nor create default mount, but "
                "global legacy source password set. This is bad.");
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        }
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        xmlFree(source_password);
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    }
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    /* drop the first listening socket details if more than one is defined, as we only
     * have port or listen-socket not both */
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    if (configuration->listen_sock_count > 1) {
        configuration->listen_sock = config_clear_listener(configuration->listen_sock);
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        configuration->listen_sock_count--;
    }
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    if (configuration->port == 0)
        configuration->port = 8000;
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    /* issue some warnings on bad configurations */
    if (!configuration->fileserve)
        ICECAST_LOG_WARN("Warning, serving of static files has been disabled "
            "in the config, this will also affect files used by the web "
            "interface (stylesheets, images).");

    __check_hostname(configuration);
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    if (!configuration->location ||
        strcmp(configuration->location, CONFIG_DEFAULT_LOCATION) == 0) {
        ICECAST_LOG_WARN("Warning, <location> not configured, using default "
            "value \"%s\".", CONFIG_DEFAULT_LOCATION);
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      if (!configuration->location)
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          configuration->location = (char *) xmlCharStrdup(CONFIG_DEFAULT_LOCATION);
    }
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    if (!configuration->admin ||
        strcmp(configuration->admin, CONFIG_DEFAULT_ADMIN) == 0) {
        ICECAST_LOG_WARN("Warning, <admin> contact not configured, using "
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            "default value \"%s\". This breaks YP directory listings. "
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            "YP directory support will be disabled.", CONFIG_DEFAULT_ADMIN);
            /* FIXME actually disable YP */
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      if (!configuration->admin)
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          configuration->admin = (char *) xmlCharStrdup(CONFIG_DEFAULT_ADMIN);
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  }
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}

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static void _parse_limits(xmlDocPtr     doc,
                          xmlNodePtr    node,
                          ice_config_t *configuration)
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{
    char *tmp;
    do {
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        if (node == NULL)
            break;
        if (xmlIsBlankNode(node))
            continue;
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        if (xmlStrcmp(node->name, XMLSTR("clients")) == 0) {
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            __read_int(doc, node, &configuration->client_limit, "<clients> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("sources")) == 0) {
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            __read_int(doc, node, &configuration->source_limit, "<sources> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("bodysize")) == 0) {
            __read_int(doc, node, &configuration->body_size_limit, "<bodysize> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("queue-size")) == 0) {
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            __read_unsigned_int(doc, node, &configuration->queue_size_limit, "<queue-size> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("client-timeout")) == 0) {
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            __read_int(doc, node, &configuration->client_timeout, "<client-timeout> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("header-timeout")) == 0) {
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            __read_int(doc, node, &configuration->header_timeout, "<header-timeout> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("source-timeout")) == 0) {
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            __read_int(doc, node, &configuration->source_timeout, "<source-timeout> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("body-timeout")) == 0) {
            __read_int(doc, node, &configuration->body_timeout, "<body-timeout> must not be empty.");
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        } else if (xmlStrcmp(node->name, XMLSTR("burst-on-connect")) == 0) {
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            ICECAST_LOG_WARN("<burst-on-connect> is deprecated, use <burst-size> instead.");
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            tmp = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
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            if (util_str_to_int(tmp, 0) == 0)
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                configuration->burst_size = 0;
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            if (tmp)
                xmlFree(tmp);
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        } else if (xmlStrcmp(node->name, XMLSTR("burst-size")) == 0) {
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            __read_unsigned_int(doc, node, &configuration->burst_size, "<burst-size> must not be empty.");
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        } else if (node->type == XML_ELEMENT_NODE) {
            ICECAST_LOG_ERROR("Unknown config tag: %s", node->name);
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        }
    } while ((node = node->next));
}

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