<?php
/*
 *  brisk - Obj/sac-a-push.phh
 *
 *  Copyright (C) 2012-2014 Matteo Nastasi
 *                          mailto: nastasi@alternativeoutput.it
 *                                  matteo.nastasi@milug.org
 *                          web: http://www.alternativeoutput.it
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABLILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details. You should have received a
 * copy of the GNU General Public License along with this program; if
 * not, write to the Free Software Foundation, Inc, 59 Temple Place -
 * Suite 330, Boston, MA 02111-1307, USA.
 *
 */

define('SITE_PREFIX', "/brisk/");
define('SITE_PREFIX_LEN', 7);

define('DIRECT_ST_READ',  1);
define('DIRECT_ST_WRITE', 2);

declare(ticks = 1);

/* this list is created with bin/get_globals.sh */
$_globals_list = array(
'G_admin_mail', 'G_alarm_passwd', 'G_all_points', 'G_ban_list', 'G_base',
'G_black_list', 'G_brisk_version', 'G_btrace_pref_sub', 'G_cloud_smasher',
'G_crypt_key', 'G_dbasetype', 'G_dbauth', 'G_dbpfx', 'G_doc_path',
'G_proto', 'G_domain', 'G_donors_all', 'G_donors_cur', 'G_is_local', 'G_lang', 'G_lng',
'G_mail_seed', 'G_notguar_code', 'G_PG_cons', 'G_PG_cons_n', 'G_PG_vow',
'G_PG_vow_n', 'G_poll_entries', 'G_poll_name', 'G_poll_title',
'G_provider_proxy', 'G_proxy_white_list', 'G_room_about', 'G_room_help',
'G_room_passwdhowto', 'G_room_roadmap',
'G_selfreg_mask', 'G_selfreg_tout', 'G_shutdown', 'G_sidebanner',
'G_sidebanner_idx', 'G_splash_content', 'G_splash_contents',
'G_splash_cont_idx', 'G_splash_h', 'G_splash_idx', 'G_splash_interval',
'G_splash_timeout', 'G_splash_w', 'G_topbanner', 'G_tos_dthard',
'G_tos_dtsoft', 'G_tos_fname', 'G_tos_idx', 'G_tos_vers', 'G_webbase');

function global_dump()
{
    GLOBAL $G_alarm_passwd, $G_ban_list, $G_black_list, $G_btrace_pref_sub, $G_dbauth;
    GLOBAL $G_dbpfx, $G_donors_all, $G_donors_cur, $G_is_local, $G_lang;
    GLOBAL $G_poll_entries, $G_poll_name, $G_poll_title, $G_proxy_white_list;
    GLOBAL $G_room_roadmap, $G_shutdown;
    GLOBAL $G_splash_content, $G_splash_contents, $G_splash_cont_idx;
    GLOBAL $G_splash_h, $G_splash_idx, $G_splash_interval, $G_splash_timeout;
    GLOBAL $G_splash_w, $G_topbanner, $G_with_donors, $G_with_poll;
    GLOBAL $G_with_splash, $G_sidebanner, $G_sidebanner_idx;
    GLOBAL $G_with_topbanner, $G_selfreg_tout, $G_selfreg_mask;

    fprintf(STDERR, "G_alarm_passwd = [%s]\n", print_r($G_alarm_passwd, TRUE));
    fprintf(STDERR, "G_ban_list = [%s]\n", print_r($G_ban_list, TRUE));
    fprintf(STDERR, "G_black_list = [%s]\n", print_r($G_black_list, TRUE));
    fprintf(STDERR, "G_btrace_pref_sub = [%s]\n", print_r($G_btrace_pref_sub, TRUE));
    fprintf(STDERR, "G_dbauth = [%s]\n", print_r($G_dbauth, TRUE));
    fprintf(STDERR, "G_dbpfx = [%s]\n", print_r($G_dbpfx, TRUE));
    fprintf(STDERR, "G_donors_all = [%s]\n", print_r($G_donors_all, TRUE));
    fprintf(STDERR, "G_donors_cur = [%s]\n", print_r($G_donors_cur, TRUE));
    fprintf(STDERR, "G_is_local = [%s]\n", print_r($G_is_local, TRUE));
    fprintf(STDERR, "G_lang = [%s]\n", print_r($G_lang, TRUE));
    fprintf(STDERR, "G_poll_entries = [%s]\n", print_r($G_poll_entries, TRUE));
    fprintf(STDERR, "G_poll_name = [%s]\n", print_r($G_poll_name, TRUE));
    fprintf(STDERR, "G_poll_title = [%s]\n", print_r($G_poll_title, TRUE));
    fprintf(STDERR, "G_proxy_white_list = [%s]\n", print_r($G_proxy_white_list, TRUE));
    fprintf(STDERR, "G_room_roadmap = [%s]\n", print_r($G_room_roadmap, TRUE));
    fprintf(STDERR, "G_shutdown = [%s]\n", print_r($G_shutdown, TRUE));
    fprintf(STDERR, "G_splash_content = [%s]\n", print_r($G_splash_content, TRUE));
    fprintf(STDERR, "G_splash_contents = [%s]\n", print_r($G_splash_contents, TRUE));
    fprintf(STDERR, "G_splash_cont_idx = [%s]\n", print_r($G_splash_cont_idx, TRUE));
    fprintf(STDERR, "G_splash_h = [%s]\n", print_r($G_splash_h, TRUE));
    fprintf(STDERR, "G_splash_idx = [%s]\n", print_r($G_splash_idx, TRUE));
    fprintf(STDERR, "G_splash_interval = [%s]\n", print_r($G_splash_interval, TRUE));
    fprintf(STDERR, "G_splash_timeout = [%s]\n", print_r($G_splash_timeout, TRUE));
    fprintf(STDERR, "G_splash_w = [%s]\n", print_r($G_splash_w, TRUE));
    fprintf(STDERR, "G_topbanner = [%s]\n", print_r($G_topbanner, TRUE));
    fprintf(STDERR, "G_with_donors = [%s]\n", print_r($G_with_donors, TRUE));
    fprintf(STDERR, "G_with_poll = [%s]\n", print_r($G_with_poll, TRUE));
    fprintf(STDERR, "G_sidebanner = [%s]\n", print_r($G_sidebanner, TRUE));
    fprintf(STDERR, "G_sidebanner_idx = [%s]\n", print_r($G_sidebanner_idx, TRUE));
    fprintf(STDERR, "G_with_splash = [%s]\n", print_r($G_with_splash, TRUE));
    fprintf(STDERR, "G_with_topbanner = [%s]\n", print_r($G_with_topbanner, TRUE));
    fprintf(STDERR, "G_selfreg_mask = [%x]\n", print_r($G_selfreg_mask, TRUE));

    fprintf(STDERR, "G_selfreg_tout = [%s]\n", print_r($G_selfreg_tout, TRUE));

}

function pid_save()
{
    $pid = getmypid();
    $fname = LEGAL_PATH."/brisk.pid";

    if (file_exists($fname)) {
        log_crit("WARN: brisk.pid already exists");
    }
    file_put_contents($fname, sprintf("%d\n", $pid));
}

function pid_remove()
{
    $fname = LEGAL_PATH."/brisk.pid";

    if (file_exists($fname)) {
        unlink($fname);
    }
}

function post_manage(&$post, $line)
{
    $a = explode('&', $line);
    for ($i = 0 ; $i < count($a) ; $i++) {
        $b = explode('=', $a[$i]);
        if (isset($b[0])) {
            if (isset($b[1])) {
                $post[$b[0]] = urldecode($b[1]);
            }
            else {
                $post[$b[0]] = "";
            }
        }
    }
}

function spu_process_info($stream_info, &$method, &$header, &$get, &$post, &$cookie, &$rest, &$cont)
{
    $check_post = FALSE;
    $header = array();
    $get = array();
    $post = array();
    $rest = 0;
    foreach(preg_split("/(\r?\n)/", $stream_info) as $line) {
        // printf("LINE: [%s]\n", $line);
        if ($check_post) {
            if (!isset($header['The-Request'])) {
                return FALSE;
            }
            $req = explode(" ", $header['The-Request']);
            $method = $req[0];

            if (isset($header['Cookie'])) {

                // LINE: [Cookie:sess=50e053a9511ef; CO_splashdate4=1356420646; CO_list=all; table_idx=7; table_token=510d494986925; lang=it; CO_bin5_pref_ring_endauct=false; CO_splashdate5=1358372822; CO_splashdate1=1363203374; CO_splashdate2=1363374826; __utma=43654517.209888411.1356605271.1356605271.1356605271.1; __utmz=43654517.1356605271.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)]

                $cookies = explode("; ", $header['Cookie']);
                for ($i = 0 ; $i < count($cookies) ; $i++) {
                    $name = mb_strstr($cookies[$i], "=", TRUE, 'UTF-8');
                    if ($name == FALSE) {
                        if (mb_strlen($cookies[$i]) > 0) {
                            $cookie[$cookies[$i]] = "";
                        }
                        else {
                            printf("WARNING: malformat cookie element [%s]\n", $cookies[$i]);
                        }
                        continue;
                    }

                    $value = mb_substr($cookies[$i], mb_strlen($name)+1, 10140, 'UTF-8');
                    $cookie[$name] = urldecode($value);
                }
            }
            // GET params management
            $get_vars = explode('?', $req[1], 2);
            $path = $get_vars[0];
            if (count($get_vars) > 1) {
                $a = explode('&', $get_vars[1]);
                // printf("A COUNT: [%s] %d\n", $a[0], count($a));
                for ($i = 0 ; $i < count($a) ; $i++) {
                    $b = explode('=', $a[$i]);
                    if ($b[0] == "")
                        continue;
                    $get[$b[0]] = urldecode($b[1]);
                }
            }
            // POST params management
            if ($req[0] == 'POST') {
                $conttype_all = explode(";", $header['Content-Type']);
                $header['Content-Type'] = $conttype_all[0];
                // $path_all[1-] other things like charset and so on

                // if (content-type is wrong || content-length isn't set)
                //     return false

                if ($header['Content-Type'] != 'application/x-www-form-urlencoded'
                    || !isset($header['Content-Length'])) {
                    return FALSE;
                }
                $post_len = mb_strlen($line, "ASCII");
                // printf("INFO: postlen: %d\n", $post_len);
                $rest = (int)($header['Content-Length']) - $post_len;

                if ($rest == 0) {
                    post_manage($post, $line);
                }
                else {
                    $cont = $line;
                }
            }
            break;
        }
        if ($line == "") {
            $check_post = TRUE;
            continue;
        }
        $split = explode(":", $line, 2);
        $hea_id = trim(mb_convert_case($split[0], MB_CASE_TITLE, 'UTF-8'));
        $header[$hea_id] = $split[1];
    }
    return $path;
}

function gpcs_var($name, $get, $post, $cookie)
{
    if (isset($GLOBALS[$name]))
        return FALSE;
    else if (isset($cookie[$name]))
        return ($cookie[$name]);
    else if (isset($post[$name]))
        return ($post[$name]);
    else if (isset($get[$name]))
        return ($get[$name]);

    return FALSE;
}

function headers_render($header, $len)
{
    $cookies = "";

    if (isset($header['cookies'])) {
        $cookies = $header['cookies']->render();
        unset($header['cookies']);
    }
    if (isset($header['Location'])) {
        $s = sprintf("HTTP/1.1 302 OK\r\n%sLocation: %s\r\n", $cookies, $header['Location']);
    }
    else if (isset($header['HTTP-Response'])) {
        $s = sprintf("HTTP/1.1 %s\r\n", $header['HTTP-Response']);
        foreach($header as $key => $value) {
            if (strtolower($key) == "http-response")
                continue;
            $s .= sprintf("%s: %s\r\n", $key, $value);
        }
        if ($len >= 0) {
            $s .= sprintf("Content-Length: %ld\r\n", $len);
        }
    }
    else {
        $s = "HTTP/1.1 200 OK\r\n";

        if (!isset($header['Date']))
            $s .= sprintf("Date: %s\r\n", date(DATE_RFC822));
        if (!isset($header['Connection']))
            $s .= "Connection: close\r\n";
        if (!isset($header['Content-Type']))
            $s .= "Content-Type: text/html\r\n";
        foreach($header as $key => $value) {
            $s .= sprintf("%s: %s\r\n", $key, $value);
        }
        if ($len >= 0) {
            $s .= sprintf("Content-Length: %d\r\n", $len);
        }
        else {
            $s .= "Cache-Control: no-cache, must-revalidate\r\n";
            $s .= "Expires: Mon, 26 Jul 1997 05:00:00 GMT\r\n";
            if (!isset($header['Content-Encoding'])) {
                $s .= "Content-Encoding: chunked\r\n";
            }
            $s .= "Transfer-Encoding: chunked\r\n";
        }
        $s .= $cookies;
    }
    $s .= "\r\n";

    return ($s);
}

/*
 *  Caching system using ob php system to cache old style pages
 *  to a var and than send it with more calm
 */

function shutta()
{
  log_rd2("SHUTTA [".connection_status()."] !");
}

register_shutdown_function('shutta');

/*
 *  MAIN
 */

function get_encoding($header)
{
    $enc = "plain";
    if (isset($header['Accept-Encoding'])) {
        $acc = explode(',', $header['Accept-Encoding']);

        if (array_search('gzip', $acc) !== FALSE) {
            $enc = 'gzip';
        }
        else if (array_search('deflate', $acc) !== FALSE) {
            $enc = 'deflate';
        }
    }

    return ($enc);
}

class Cookie {
    var $attr;
    // Set-Cookie: reg_fb_gate=deleted; Expires=Thu, 01-Jan-1970 00:00:01 GMT; Path=/; Domain=.foo.com; HttpOnly
    // string $name  [, string $value  [, int $expire = 0  [, string $path  [, string $domain  [, bool $secure = false  [, bool $httponly = false  ]]]]]] )
    function Cookie()
    {
        $this->attr = array();
    }

    static function create($name)
    {
        $thiz = new Cookie();

        $thiz->attr[$name] = "";

        $argc = func_num_args();
        for ($i = 1 ; $i < $argc ; $i++) {
            $arg = func_get_arg($i);
            switch ($i) {
            case 1:
                $thiz->attr[$name] = urlencode($arg);
                break;
            case 2:
                $thiz->attr['Expires'] = gmdate('D, d M Y H:i:s \G\M\T', $arg); // RFC 1211 format
                break;
            case 3:
                $thiz->attr['Path'] = $arg;
                break;
            case 4:
                $thiz->attr['Domain'] = $arg;
                break;
            case 5:
                if ($arg == TRUE) {
                    $thiz->attr['Secure'] = NULL;
                }
                break;
            case 6:
                if ($arg == TRUE) {
                    $thiz->attr['HttpOnly'] = NULL;
                }
                break;
            default:
                return FALSE;
            }
        }

        return $thiz;
    }

    function render()
    {
        $r = "Set-Cookie: ";
        $isfirst = TRUE;

        foreach ($this->attr as $k => $v) {
            if ($v == NULL) {
                $r .= sprintf("%s%s", ($isfirst ? "" : "; "), $k);
            }
            else {
                $r .= sprintf("%s%s=%s", ($isfirst ? "" : "; "), $k, $v);
            }
            $isfirst = FALSE;
        }
        $r .= "\r\n";

        return $r;
    }
}

class Cookies {
    var $cookies;

    function Cookies()
    {
        $this->cookies = array();
    }

    function add($name)
    {
        if (($cookie = call_user_func_array("Cookie::create", func_get_args())) == FALSE)
            return (FALSE);

        array_push($this->cookies, $cookie);

        return (TRUE);
    }

    function render()
    {
        $r = "";
        foreach ($this->cookies as $cookie) {
            $r .= $cookie->render();
        }

        return ($r);
    }
}


class Sac_a_push {
    // maybe fixed_fd is unuseful
    static $fixed_fd = 3;
    static $cnt_master = NULL;
    static $cnt_slave  = NULL;

    var $provider_proxy; // list of provider/browser that offer proxy service

    var $file_socket_pfx;
    var $unix_socket_pfx;
    var $direct_socket;   // socket where read direct commands
    var $socks;
    var $s2u;             // user associated with input socket
    var $s2p;             // pending page associated with input socket
    var $pending_pages;
    var $is_daemon;

    var $list_web;
    var $list_cmd;
    var $in;

    var $debug;
    var $blocking_mode;

    var $app;

    var $curtime;

    var $rndstr;
    var $main_loop;

    function Sac_a_push()
    {
    }

    function sig_handler($sig)
    {
        switch ($sig) {
        case SIGINT:
            exit(1);
            break;
        case SIGTERM:
            if (static::$cnt_master != NULL) {
                    fwrite(static::$cnt_master, "\nshutdown\n");
                    fflush(static::$cnt_master);
            }
            else {
                exit(1);
            }
            break;
        case SIGHUP:
            if (static::$cnt_master != NULL) {
                fwrite(static::$cnt_master, "\nreload\n");
                fflush(static::$cnt_master);
            }
            break;
        }
    }

    static function create(&$app, $sockname_pfx, $debug, $blocking_mode, $provider_proxy, $argv)
    {
        $thiz = new Sac_a_push();

        $thiz->app = $app;

        $thiz->provider_proxy = ProviderProxy::create();

        $thiz->file_socket_pfx = $sockname_pfx;
        $thiz->unix_socket_pfx = "unix://$sockname_pfx";
        $thiz->direct_socket = "unix://${sockname}_admin.sock";
        $thiz->debug = $debug;
        $thiz->list_web = array();
        $thiz->socks = array();
        $thiz->s2u  = array();
        $thiz->s2p  = array();
        $thiz->pending_pages = array();
        $thiz->is_daemon = FALSE;

        if (array_search("-d", $argv) !== FALSE || array_search("--daemon", $argv) !== FALSE) {
            $thiz->is_daemon = TRUE;
        }

        // create a couple of sockets for control management
        if (($sockpair = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM,
                                            STREAM_IPPROTO_IP)) == FALSE) {
            return FALSE;
        }
        static::$cnt_master = $sockpair[0];
        static::$cnt_slave  = $sockpair[1];

        pcntl_signal(SIGTERM, array("Sac_a_push", "sig_handler"));
        pcntl_signal(SIGINT, array("Sac_a_push", "sig_handler"));
        pcntl_signal(SIGHUP, array("Sac_a_push", "sig_handler"));

        $thiz->blocking_mode = 0; // 0 for non-blocking

        $thiz->rndstr = "";
        for ($i = 0 ; $i < 4096 ; $i++) {
            if (($i % 128) == 0)
                $thiz->rndstr .= " ";
            else
                $thiz->rndstr .= chr(mt_rand(65, 90));
        }

        for ($i = 0 ; $i < USOCK_POOL_N ; $i++) {
            $file_socket = $thiz->file_socket_pfx . sprintf("%d.sock", $i);
            if (file_exists($file_socket)) {
                unlink($file_socket);
            }
        }
        $file_socket_admin = $thiz->file_socket_pfx . "_admin.sock";
        if (file_exists($file_socket_admin)) {
            unlink($file_socket_admin);
        }

        $old_umask = umask(0);
        for ($i = 0 ; $i < USOCK_POOL_N ; $i++) {
            $unix_socket = sprintf("%s%d.sock", $thiz->unix_socket_pfx, $i);
            if (($list_sock = stream_socket_server($unix_socket, $err, $errs)) === FALSE) {
                return (FALSE);
            }
            array_push($thiz->list_web, $list_sock);
        }
        if (($thiz->list_cmd = stream_socket_server($thiz->direct_socket, $err, $errs)) === FALSE) {
            return (FALSE);
        }
        umask($old_umask);
        for ($i = 0 ; $i < USOCK_POOL_N ; $i++) {
            stream_set_blocking($thiz->list_web[$i], $thiz->blocking_mode); # Set the stream to non-blocking
        }
        stream_set_blocking($thiz->list_cmd, $thiz->blocking_mode); # Set the stream to non-blocking

        if (($thiz->in = fopen("php://stdin", "r")) === FALSE) {
            return(FALSE);
        }

        $thiz->main_loop = FALSE;
        $thiz->reload(TRUE, $provider_proxy);

        return ($thiz);
    }

    function socks_set($sock, $user, $pendpage)
    {
        $id = intval($sock);

        $this->socks[$id] = $sock;
        if ($user != NULL)
            $this->s2u[$id]   = $user;
        if ($pendpage != NULL)
            $this->s2p[$id]   = $pendpage;
    }

    function socks_unset($sock)
    {
        $id = intval($sock);

        if (isset($this->s2u[$id]))
            unset($this->s2u[$id]);
        if (isset($this->s2p[$id]))
            unset($this->s2p[$id]);
        unset($this->socks[$id]);
    }

    function pendpage_try_addcont(&$new_socket, $tout, $method, $header, $get, $post, $cookie, $path, $addr, $rest, $cont)
    {
        $pendpage = PendingPage::pendingpage_continue( $new_socket, $this->curtime, $tout, $method,
                                                           $header,           $get, $post, $cookie,
                                                             $path,          $addr, $rest, $cont);

        $pendpage->try_flush($this->curtime);
        // Add $pendpage to the pendpage array (in any case)
        // fprintf(STDERR, "IMPORTANT: Pendadd: %d\n", $pendpage->status);
        $this->pendpage_add($pendpage);
    }

    function pendpage_try_addflush(&$new_socket, $tout, $enc, $header_out, $content)
    {
        $pendpage = PendingPage::pendingpage_flushing($new_socket, $this->curtime, $tout, $enc, $header_out, $content);

        if ($pendpage->try_flush($this->curtime) == FALSE) {
            // Add $pendpage to the pendpage array
            $this->pendpage_add($pendpage);
        }
    }

    function pendpage_add($pendpage)
    {
        array_push($this->pending_pages, $pendpage);
        $this->socks_set($pendpage->socket_get(), NULL, $pendpage);
    }

    function pendpage_rem($pendpage)
    {
        $sock = $pendpage->socket_get();
        if (($key = array_search($pendpage, $this->pending_pages)) !== FALSE) {
            unset($this->pending_pages[$key]);
        }
        else {
            fprintf(STDERR, "WARNING: pendpage not found\n");
        }
        $this->socks_unset($sock);
        fprintf(STDERR, "PP_REM: %d\n", intval($sock));
    }


    function pendpage_try_addwait(&$new_socket, $tout, $method, $header, $get, $post, $cookie, $path, $addr, $rest, $cont)
    {
        $pendpage = PendingPage::pendingpage_waiting($new_socket, $this->curtime, $tout, $method, $header, $get, $post, $cookie, $path, $addr, $rest, $cont);
        /*
        if ($pendpage->try_flush($this->curtime) == FALSE) {
            // Add $pendpage to the pendpage array
            */
        $this->pendpage_add($pendpage);
        /*
        }
        */
    }

    function garbage_manager($force)
    {
        $this->app->garbage_manager($force);

        foreach ($this->socks as $k => $sock) {
            $id = intval($sock);
            if (isset($this->s2u[$id])) {
                $user = $this->s2u[$id];
                if ($user->the_end) {
                    if (($user->rd_toflush == FALSE && $user->rd_step == $user->step)
                        || $user->rd_endtime_is_expired($this->curtime)) {
                        if ($user->rd_socket_get() != NULL) {
                            $user->rd_socket_set(NULL);
                        }
                        unset($this->socks[$id]);
                        unset($this->s2u[$id]);
                        fclose($sock);
                        // printf("CLOSE ON GARBAGE MANAGER\n");
                    }
                }
            }
        }
        $this->app->users_cleanup();
    }

    function check_globals()
    {
        GLOBAL $_globals_list;
        foreach ($_globals_list as $g) {
            if (!array_search($g, $GLOBALS) || !isset($GLOBALS[$g])) {
                error_log(sprintf("Global [%s] not declared", $g));
                return FALSE;
            }
        }
        return TRUE;
    }

    function run()
    {
        GLOBAL $DOCUMENT_ROOT, $HTTP_HOST;

        GLOBAL $G_alarm_passwd, $G_ban_list, $G_black_list, $G_cloud_smasher, $G_provider_proxy;
        GLOBAL $G_btrace_pref_sub, $G_dbauth;
        GLOBAL $G_dbpfx, $G_donors_all, $G_donors_cur, $G_is_local, $G_lang;
        GLOBAL $G_poll_entries, $G_poll_name, $G_poll_title, $G_proxy_white_list;
        GLOBAL $G_room_roadmap, $G_shutdown;
        GLOBAL $G_splash_content, $G_splash_contents, $G_splash_cont_idx;
        GLOBAL $G_splash_h, $G_splash_idx, $G_splash_interval, $G_splash_timeout;
        GLOBAL $G_splash_w, $G_topbanner, $G_with_donors, $G_with_poll;
        GLOBAL $G_with_splash, $G_sidebanner, $G_sidebanner_idx;
        GLOBAL $G_with_topbanner;
        GLOBAL $G_tos_vers, $G_tos_fname, $G_tos_dtsoft, $G_tos_dthard, $G_tos_idx, $G_doc_path;

        if (!$this->check_globals()) {
            fprintf(STDERR, "Take a look to the phplog file, GLOBALS missing!\n");
            sleep(10);
        }

        if ($this->main_loop) {
            return (FALSE);
        }

        $this->main_loop = TRUE;

        $list_web_arr = array();
        for ($i = 0 ; $i < USOCK_POOL_N ; $i++) {
            $list_web_arr[intval($this->list_web[$i])] = $this->list_web[$i];
        }

        $lastime = 0;
        $dump_users = TRUE;
        while ($this->main_loop) {
            $this->app->sess_cur_set(FALSE);
            $this->curtime = time();
            if ($lastime != ($this->curtime >> 2)) {
                fprintf(STDERR, "\nIN LOOP: Current opened: %d  pending_pages: %d\n", count($this->socks), count($this->pending_pages));
            }

            /* Prepare the read array */
            /* // when we manage it ... */
            /* if ($shutdown)  */
            /*     $read   = array_merge(array("$in" => $in), $socks); */
            /* else */
            $pre_read = array_merge($list_web_arr, array(
                intval($this->list_cmd) => $this->list_cmd,
                intval(static::$cnt_slave) => static::$cnt_slave),
            $this->socks);
            if ($this->is_daemon == FALSE) {
                $read = array_merge($pre_read, array(intval($this->in) => $this->in));
            }
            else {
                $read = $pre_read;
            }

            if ($this->debug > 1) {
                printf("PRE_SELECT\n");
                print_r($read);
            }
            $write  = NULL;
            $except = NULL;
            $num_changed_sockets = @stream_select($read, $write, $except, 0, 500000);

            if ($num_changed_sockets == 0) {
                // printf(" no data in 5 secs, splash [%d]\n", $G_with_splash);
                ;
            }
            else if ($num_changed_sockets > 0) {
                if ($lastime != ($this->curtime >> 2)) {
                    printf("num sock %d num_of_socket: %d\n", $num_changed_sockets, count($read));
                }
                if ($this->debug > 1) {
                    print_r($read);
                }
                /* At least at one of the sockets something interesting happened */
                foreach ($read as $i => $sock) {
                    $id = intval($sock);
                    $manage_page = FALSE;
                    /* is_resource check is required because there is the possibility that
                       during new request an old connection is closed */
                    if (!is_resource($sock)) {
                        continue;
                    }
                    $list_web_idx = array_search($sock, $this->list_web, TRUE);
                    if ($list_web_idx !== FALSE) {
                        $list_web_usock = $this->list_web[$list_web_idx];
                        // printf("NUOVA CONNEX\n");
                        if (($new_unix = stream_socket_accept($list_web_usock)) == FALSE) {
                            printf("SOCKET_ACCEPT FAILED\n");
                            continue;
                        }
                        $stream_info = "";
                        $method      = "";
                        $get         = array();
                        $post        = array();
                        $cookie      = array();
                        $rest        = 0;
                        $cont        = "";
                        if (($new_socket = ancillary_getstream($new_unix, $stream_info)) !== FALSE) {
                            // printf("NEW_SOCKET: %d\n", intval($new_socket));
                            stream_set_blocking($new_socket, $this->blocking_mode); // Set the stream to non-blocking
                            // error_log(sprintf("RECEIVED HEADER:\n%s", $stream_info));
                            if (($path = spu_process_info($stream_info, $method, $header,
                                                          $get, $post, $cookie, $rest, $cont))
                                == FALSE) {
                                fprintf(STDERR, "TODO: fix wrong header management\n");
                            }

                            // We try to get real IP from header (passed by proxy) and then fallback to direct connection IP
                            // error_log(sprintf("addr: [%s]", $addr));
                            // error_log(sprintf("X-Real-Ip: [%s]", array_key_exists('X-Real-Ip', $header) ? $header['X-Real-Ip'] : "Not exists"));
                            if (array_key_exists('X-Real-Ip', $header)) {
                                $addr = $header['X-Real-Ip'];
                            }
                            else {
                                $addr = addrtoipv4(stream_socket_get_name($new_socket, TRUE));
                            }

                            // FOR TEST $header['X-Forwarded-For'] = '154.155.22.33';
                            $addr = $this->pproxy_realip($header, $addr);

                            // printf("PATH: [%s] [%s]\n", $path, print_r($header, TRUE));
                            if ($method == "POST" && $rest > 0) {
                                if (isset($header['Expect']) && $header['Expect'] == '100-continue') {
                                    // fprintf(STDERR, "\nPOSTA DE CHE\n\n");
                                    $this->pendpage_try_addcont($new_socket, 20,
                                                                $method, $header, $get, $post, $cookie,
                                                                $path, $addr, $rest, $cont);
                                }
                                else {
                                    $this->pendpage_try_addwait($new_socket, 20,
                                                                $method, $header, $get, $post, $cookie,
                                                                $path, $addr, $rest, $cont);
                                }
                            }
                            else {
                                $manage_page = TRUE;
                            }

                            // printf("number of sockets after %d\n", count($this->socks));
                        }
                        else {
                            printf("WARNING: ancillary_getstream failed\n");
                        }
                    }
                    else if ($sock === $this->list_cmd) {
                        // printf("NUOVA DIRECT CONNEX\n");
                        if (($new_unix = stream_socket_accept($this->list_cmd)) == FALSE) {
                            printf("SOCKET_ACCEPT FAILED\n");
                            continue;
                        }
                        stream_set_blocking($new_unix, $this->blocking_mode);
                        $this->direct_mgmt($new_unix);
                    } // not socket_list nor socket_list_cmd
                    else {  // already opened socket
                        $buf = fread($sock, 4096);
                        // if socket is closed
                        if ($buf == FALSE || feof($sock)) {
                            // close socket case
                            if ($buf == FALSE) {
                                // printf("INFO: read return false\n");
                                ;
                            }
                            if (array_search($sock, $this->list_web, TRUE) !== FALSE) {
                                // printf("Arrivati %d bytes da list\n", mb_strlen($buf, "ASCII"));
                                return(21);
                            }
                            else if ($sock === $this->list_cmd) {
                                // printf("Arrivati %d bytes da list_cmd\n", mb_strlen($buf, "ASCII"));
                                return(23);
                            }
                            else if ($sock === $this->in || $sock === static::$cnt_slave) {
                                // printf("Arrivati %d bytes da stdin\n", mb_strlen($buf, "ASCII"));
                                return(22);
                            }
                            else {
                                unset($this->socks[$id]);
                                if (isset($this->s2u[$id])) {
                                    // $user_a[$s2u[$id]]->disable();
                                    if ($this->s2u[$id]->rd_socket_get() != NULL) {
                                        // try to send close frame (for websocket)
                                        $clo = $this->s2u[$id]->stream_close();
                                        $clo_l = mb_strlen($clo, "ASCII");
                                        @fwrite($sock, $clo, $clo_l);
                                        $this->s2u[$id]->rd_socket_set(NULL);
                                    }
                                    unset($this->s2u[$id]);
                                }
                            }
                            fclose($sock);
                            // printf("CLOSE ON READ\n");

                            if ($this->debug > 1) {
                                printf("post unset\n");
                                print_r($this->socks);
                            }
                        }  // if ($buf == FALSE || mb_strlen($buf, "ASCII") == 0) {
                        else { // data on the socket
                            if ($this->debug > 1) {
                                print_r($read);
                            }
                            if (array_search($sock, $this->list_web, TRUE) !== FALSE) {
                                // printf("Arrivati %d bytes da list\n", mb_strlen($buf, "ASCII"));
                                ;
                            }
                            else if ($sock === $this->list_cmd) {
                                // printf("Arrivati %d bytes da list_cmd\n", mb_strlen($buf, "ASCII"));
                                ;
                            }
                            else if ($sock === $this->in || $sock === static::$cnt_slave) {
                                // printf("Arrivati %d bytes da stdin\n", mb_strlen($buf, "ASCII"));
                                $line = trim($buf);
                                if ($line == "reload") {
                                    require("$DOCUMENT_ROOT/Etc/".BRISK_CONF);
                                    $this->reload(FALSE, $G_provider_proxy);
                                    $this->app->reload(FALSE, $G_ban_list, $G_black_list,
                                                       $G_cloud_smasher);
                                    if (!$this->check_globals()) {
                                        fprintf(STDERR, "Take a look to the phplog file, GLOBALS missing!\n");
                                        sleep(10);
                                    }
                                    global_dump();
                                }
                                else if ($line == "dump") {
                                    $dump_users = TRUE;
                                }
                                else if ($line == "shutdown" || $line == "sd") {
                                    if ($this->app->dump_data()) {
                                        return(0);
                                    }
                                    else {
                                        return(1);
                                    }
                                }
                            }
                            else {  // data arrived from not special socket
                                $key = array_search("$sock", $this->socks);
                                // fprintf(STDERR, "Arrivati %d bytes dalla socket n. %d\n", mb_strlen($buf, "ASCII"), $key);

                                if (isset($this->s2u[$id])) {
                                    //
                                    //  TODO:
                                    //     fix $addr
                                    //     fix $this->pendpage_try_addflush below (probably not required)
                                    //
                                    $addr = "127.0.0.1";
                                    $user = $this->s2u[$id];

                                    // fprintf(STDERR, 'POST USER');
                                    if ($user && $user->rd_transp && strpos($user->rd_transp->type, "websocket") !== FALSE) {
                                        $clie_cmd = $user->rd_transp->unchunk($buf);
                                        $clie_cmd = json_decode($clie_cmd, TRUE);
                                        // fprintf(STDERR, "HERE WE ARE INCOMING DATA [%s]\n", print_r($clie_cmd, TRUE));

                                        $wr_addr = substr(parse_url($clie_cmd["target"])["path"], strlen(SITE_PREFIX));
                                        if ($wr_addr == "index_wr.php") {
                                            ob_start();
                                            // complete: index_wr_main($this->app, $addr, $get, $post, $cookie);
                                            index_wr_main($this->app, $addr, $clie_cmd, NULL, NULL);
                                            $content = ob_get_contents();
                                            ob_end_clean();
                                        }
                                        else if ($wr_addr == "briskin5/index_wr.php") {
                                            $table_idx = $clie_cmd['table_idx'];
                                            $table_token = $clie_cmd['table_token'];

                                            if (($bri = $this->app->match_get($table_idx, $table_token)) != FALSE) {
                                                ob_start();
                                                bin5_index_wr_main($bri, $addr, $clie_cmd, NULL, NULL);
                                                $content = ob_get_contents();
                                                ob_end_clean();
                                            }
                                        }
                                        /*
                                          briskin5/index_wr.php

                                          if (isset($table_idx) && isset($table_token)) {
                                          if (($bri = $s_a_p->app->match_get($table_idx, $table_token)) != FALSE) {
                                          ob_start();
                                          bin5_index_wr_main($bri, $addr, $get, $post, $cookie);
                                          $content = ob_get_contents();
                                          ob_end_clean();
                                          }
                                          else {
                                          $content = "Bin5 Load data error";
                                          }
                                          }
                                          else {
                                          $content = "Bin5 Load data error";
                                          }
                                          $s_a_p->pendpage_try_addflush($new_socket, 20, $enc, $header_out, $content);
                                        */
                                    }
                                }
                                else {
                                    fprintf(STDERR, "User associated with ID: %s not found\n", $id);
                                }

                                if (isset($this->s2p[$id])) {
                                    $this->s2p[$id]->rest -= mb_strlen($buf, "ASCII");
                                    $this->s2p[$id]->cont .= $buf;
                                    if ($this->s2p[$id]->rest <= 0) {
                                        $header = $new_socket = $path = $addr = $get = $cookie = 0;
                                        $post = array();

                                        $this->s2p[$id]->context_get($header, $new_socket, $path, $addr, $get, $post, $cookie);
                                        $this->pendpage_rem($this->s2p[$id]);
                                        fprintf(STDERR, "SOCKET RUN: %s\n", $new_socket);

                                        $manage_page = TRUE;
                                    }
                                }
                            }
                        }
                    }

                    if ($manage_page == TRUE) {
                        /*
                        printf("M: %s\nHEADER:\n", $method);
                        print_r($header);
                        printf("GET:\n");
                        print_r($get);
                        printf("POST:\n");
                        print_r($post);
                        printf("COOKIE:\n");
                        print_r($cookie);
                        */

                        $header_out = array();
                        // TODO: MOVE DOWN request_mgr to factorize new_sockets and POST closed
                        $rret = FALSE;
                        if (!strncmp($path, SITE_PREFIX, SITE_PREFIX_LEN)) {
                            $rret = $this->app->request_mgr($this, $header, $header_out, $new_socket, substr($path, SITE_PREFIX_LEN), $addr, $get, $post, $cookie);
                        }
                        if ($rret == FALSE) {
                            // FIXME: manage 404 !!!
                            printf("TODO: fix unknown page\n");
                            fclose($new_socket);
                        }
                    }
                }
            }

            $this->garbage_manager(FALSE);

            /* manage unfinished pages */
            foreach ($this->pending_pages as $k => $pendpage) {
                // TODO: try_flush if exists in the class
                if ($pendpage->try_flush($this->curtime) == TRUE) {
                    unset($this->pending_pages[$k]);
                }
            }

            /*
               $response:                        raw stream data not sent
               $content:                         html consistent data (<script bla bla>)
               $user->stream_keepalive($w_ping)  ping srv->cli OR srv->cli + cli->srv if $w_ping == TRUE
            */

            /* manage open streaming */
            foreach ($this->socks as $k => $sock) {
                $id = intval($sock);
                if (isset($this->s2u[$id])) {
                    $user = $this->s2u[$id];

                    if ($user->rd_toflush) {
                        if (fflush($sock) == FALSE)
                            continue;
                        else
                            $user->rd_toflush = FALSE;
                    }
                    $response = $user->rd_cache_get();
                    $do_ping = FALSE;
                    if (($this->curtime - $user->lacc) > (EXPIRE_TIME_RD / 3)) {
                        $do_ping = TRUE;
                    }
                    else {
                        $user->ping_req = FALSE;
                    }

                    if ($response == "") {
                        $content = "";
                        $user->stream_main($content, $get, $post, $cookie);
                        if ($dump_users) {
                           printf("[%s] [%d] [%d]\n", $user->name, $user->lacc, $this->curtime);
                        }
                        if ($do_ping && $user->ping_req == FALSE) {
                            $content .= $user->stream_keepalive(TRUE);
                            $user->ping_req = TRUE;
                        }
                        else if ($content == "" && $user->rd_kalive_is_expired($this->curtime)) {
                            $content = $user->stream_keepalive(FALSE);
                        }
                        if ($content != "") {
                            $response = $user->chunked_content($content);
                        }
                    }

                    if ($response != "") {
                        // echo "SPIA: [".substr($response, 0, 60)."...]\n";
                        // echo "SPIA: [".$response."]\n";
                        $response_l = mb_strlen($response, "ASCII");
                        $wret = @fwrite($sock, $response, $response_l);
                        if ($wret < $response_l) {
                            printf("TROUBLE WITH FWRITE: %d\n", $wret);
                            $user->rd_cache_set(mb_substr($response, $wret, $response_l - $wret, "ASCII"));
                        }
                        else {
                            $user->rd_cache_set("");
                        }
                        if (fflush($sock) == FALSE) {
                            $user->rd_toflush = TRUE;
                            continue;
                        }
                        $user->rd_kalive_reset($this->curtime);
                    }

                    // close socket after a while to prevent client memory consumption
                    if ($user->rd_endtime_is_expired($this->curtime)) {
                        if ($this->s2u[$id]->rd_socket_get() != NULL) {
                            $this->s2u[$id]->rd_socket_set(NULL);
                        }
                        unset($this->socks[$id]);
                        unset($this->s2u[$id]);
                        $clo = $user->stream_close();
                        $clo_l = mb_strlen($clo, "ASCII");
                        @fwrite($sock, $clo, $clo_l);
                        fclose($sock);
                        // printf("CLOSE ON LOOP\n");
                    }
                }  // if (isset($this->s2u[$id]...
            }  // foreach ($this->socks...
            $dump_users = FALSE;
            printf("#");
            if (defined('CURL_DE_SAC_VERS')) {
                $this->app->cds->process();
            }
            $lastime = ($this->curtime >> 2);
        }  // while (...
    }  // function run(...

    function pproxy_realip(&$header, $ip_str)
    {
        return ($this->provider_proxy->realip($header, $ip_str));
    }

    function reload($is_first, $prov_proxy)
    {
        fprintf(STDERR, "SAP RELOAD STUFF (%d)\n", count($prov_proxy));

        $this->provider_proxy->update($prov_proxy);
    }

    function direct_command($cmdstr)
    {
        GLOBAL $G_alarm_passwd;

        $cmd = cmd_deserialize($cmdstr);

        if (!isset($cmd['cmd'])) {
            return cmd_return(500, 'no cmd found');
        }
        // "cmd" => "userauth", "sess" => 'xxxxxxxxxxx', 'private' => 'it_must_be_correct',
        //           'the_end' => 'true' );
        // cmd=userauth&sess=52d796ac08c47&private=yourpasswd192.168.122.152d796ac08c47&the_end=true
        if ($cmd['cmd'] == 'userauth') {
            if (!isset($cmd['sess']) || !isset($cmd['private'])) {
                return cmd_return(401, 'malformed cmd');
            }
            $idx = -1;
            if (($user = $this->app->get_user($cmd['sess'], $idx)) == FALSE)
                return cmd_return(402, 'user not found');

            if (($user->flags & USER_FLAG_TY_ADMIN) == 0x00)
                return cmd_return(403, 'permission denied');

            if (md5($G_alarm_passwd.$user->ip.$user->sess) != $cmd['private'])
                return cmd_return(404, 'authentication failed ['.$cmd['private'].']['.$G_alarm_passwd.$user->ip.$user->sess.']');

            return cmd_return(200, 'success');
        }

        return cmd_return(501, 'no cmd found');
    }

    function direct_mgmt($socket)
    {
        printf("DIRECT: begin\n");
        $st = DIRECT_ST_READ;
        $cmd_all = "";
        $endtime = $this->curtime + 3;

        while(time() <= $endtime) {
            printf("DIRECT: init loop %d\n", $st);
            if ($st == DIRECT_ST_READ) {
                $buf = fread($socket, 4096);
                if ($buf == FALSE && feof($socket)) {
                    break;
                }
                else if ($buf != FALSE && strlen($buf) > 0) {
                    $cmd_all .= $buf;

                    if (substr(trim($cmd_all), -13) == "&the_end=true") {
                        $output_arr = $this->direct_command($cmd_all);
                        $output = cmd_serialize($output_arr);
                        $output_cur = 0;
                        $output_len = mb_strlen($output, "ASCII");
                        $st = DIRECT_ST_WRITE;
                        continue;
                    }
                }
            }
            else if ($st == DIRECT_ST_WRITE)  {
                $ret = fwrite($socket, $output, $output_len);
                if ($ret === FALSE) {
                    if (feof($socket)) {
                        break;
                    }
                }
                else if ($ret > 0 && $ret < $output_len) {
                    $output = substr($output, -($output_len - $ret));
                    $output_len -= $ret;
                    continue;
                }
                else if ($ret == $output_len) {
                    fclose($socket);
                    return TRUE;
                }
            }
            // probably not needed
            // usleep(10000);
        }

        fclose($socket);
        return FALSE;
    }
} // class Sac_a_push
?>