function bb2_start($settings)
{
// Gather up all the information we need, first of all.
$headers = bb2_load_headers();
// Postprocess the headers to mixed-case
// FIXME: get the world to stop using PHP as CGI
$headers_mixed = array();
foreach ($headers as $h => $v) {
$headers_mixed[uc_all($h)] = $v;
}
// IPv6 - IPv4 compatibility mode hack
$_SERVER['REMOTE_ADDR'] = preg_replace("/^::ffff:/", "", $_SERVER['REMOTE_ADDR']);
// We use these frequently. Keep a copy close at hand.
$ip = $_SERVER['REMOTE_ADDR'];
$request_method = $_SERVER['REQUEST_METHOD'];
$request_uri = $_SERVER['REQUEST_URI'];
if (!$request_uri) {
$request_uri = $_SERVER['SCRIPT_NAME'];
}
# IIS
$server_protocol = $_SERVER['SERVER_PROTOCOL'];
@($user_agent = $_SERVER['HTTP_USER_AGENT']);
// Reconstruct the HTTP entity, if present.
$request_entity = array();
if (!strcasecmp($request_method, "POST") || !strcasecmp($request_method, "PUT")) {
foreach ($_POST as $h => $v) {
$request_entity[$h] = $v;
}
}
$package = array('ip' => $ip, 'headers' => $headers, 'headers_mixed' => $headers_mixed, 'request_method' => $request_method, 'request_uri' => $request_uri, 'server_protocol' => $server_protocol, 'request_entity' => $request_entity, 'user_agent' => $user_agent, 'is_browser' => false);
// Please proceed to the security checkpoint and have your
// identification and boarding pass ready.
// First check the whitelist
require_once BB2_CORE . "/whitelist.inc.php";
if (!bb2_whitelist($package)) {
// Now check the blacklist
require_once BB2_CORE . "/blacklist.inc.php";
bb2_test($settings, $package, bb2_blacklist($package));
// Check the http:BL
// config check added for DokuWiki plugin
if (!$settings['skipblackhole']) {
require_once BB2_CORE . "/blackhole.inc.php";
if (bb2_test($settings, $package, bb2_httpbl($settings, $package))) {
// Bypass all checks if http:BL says search engine
bb2_approved($settings, $package);
return true;
}
}
// Check for common stuff
require_once BB2_CORE . "/common_tests.inc.php";
bb2_test($settings, $package, bb2_protocol($settings, $package));
bb2_test($settings, $package, bb2_cookies($settings, $package));
bb2_test($settings, $package, bb2_misc_headers($settings, $package));
// Specific checks
@($ua = $headers_mixed['User-Agent']);
// Search engines first
if (stripos($ua, "bingbot") !== FALSE || stripos($ua, "msnbot") !== FALSE || stripos($ua, "MS Search") !== FALSE) {
require_once BB2_CORE . "/msnbot.inc.php";
bb2_test($settings, $package, bb2_msnbot($package));
bb2_approved($settings, $package);
return true;
} elseif (stripos($ua, "Googlebot") !== FALSE || stripos($ua, "Mediapartners-Google") !== FALSE || stripos($ua, "Google Web Preview") !== FALSE) {
require_once BB2_CORE . "/google.inc.php";
bb2_test($settings, $package, bb2_google($package));
bb2_approved($settings, $package);
return true;
} elseif (stripos($ua, "Yahoo! Slurp") !== FALSE || stripos($ua, "Yahoo! SearchMonkey") !== FALSE) {
require_once BB2_CORE . "/yahoo.inc.php";
bb2_test($settings, $package, bb2_yahoo($package));
bb2_approved($settings, $package);
return true;
}
// MSIE checks
if (stripos($ua, "MSIE") !== FALSE) {
$package['is_browser'] = true;
if (stripos($ua, "Opera") !== FALSE) {
require_once BB2_CORE . "/opera.inc.php";
bb2_test($settings, $package, bb2_opera($package));
} else {
require_once BB2_CORE . "/msie.inc.php";
bb2_test($settings, $package, bb2_msie($package));
}
} elseif (stripos($ua, "Konqueror") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/konqueror.inc.php";
bb2_test($settings, $package, bb2_konqueror($package));
} elseif (stripos($ua, "Opera") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/opera.inc.php";
bb2_test($settings, $package, bb2_opera($package));
} elseif (stripos($ua, "Safari") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/safari.inc.php";
bb2_test($settings, $package, bb2_safari($package));
} elseif (stripos($ua, "Lynx") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/lynx.inc.php";
bb2_test($settings, $package, bb2_lynx($package));
} elseif (stripos($ua, "MovableType") !== FALSE) {
require_once BB2_CORE . "/movabletype.inc.php";
bb2_test($settings, $package, bb2_movabletype($package));
} elseif (stripos($ua, "Mozilla") !== FALSE && stripos($ua, "Mozilla") == 0) {
$package['is_browser'] = true;
require_once BB2_CORE . "/mozilla.inc.php";
bb2_test($settings, $package, bb2_mozilla($package));
}
// More intensive screening applies to POST requests
if (!strcasecmp('POST', $package['request_method'])) {
require_once BB2_CORE . "/post.inc.php";
bb2_test($settings, $package, bb2_post($settings, $package));
}
}
// Last chance screening.
require_once BB2_CORE . "/screener.inc.php";
bb2_screener($settings, $package);
// And that's about it.
bb2_approved($settings, $package);
return true;
}
function bb2_screen($settings, $package)
{
// Please proceed to the security checkpoint and have your
// identification and boarding pass ready.
// First check the whitelist
require_once BB2_CORE . "/whitelist.inc.php";
if (!bb2_whitelist($package)) {
// Now check the blacklist
require_once BB2_CORE . "/blacklist.inc.php";
if ($r = bb2_blacklist($package)) {
return $r;
}
// Check the http:BL
require_once BB2_CORE . "/blackhole.inc.php";
if ($r = bb2_httpbl($settings, $package)) {
return $r;
}
// Check for common stuff
require_once BB2_CORE . "/common_tests.inc.php";
if ($r = bb2_protocol($settings, $package)) {
return $r;
}
if ($r = bb2_cookies($settings, $package)) {
return $r;
}
if ($r = bb2_misc_headers($settings, $package)) {
return $r;
}
// Specific checks
@($ua = $package['user_agent']);
// MSIE checks
if (stripos($ua, "; MSIE") !== FALSE) {
$package['is_browser'] = true;
if (stripos($ua, "Opera") !== FALSE) {
require_once BB2_CORE . "/opera.inc.php";
if ($r = bb2_opera($package)) {
return $r;
}
} else {
require_once BB2_CORE . "/msie.inc.php";
if ($r = bb2_msie($package)) {
return $r;
}
}
} elseif (stripos($ua, "Konqueror") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/konqueror.inc.php";
if ($r = bb2_konqueror($package)) {
return $r;
}
} elseif (stripos($ua, "Opera") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/opera.inc.php";
if ($r = bb2_opera($package)) {
return $r;
}
} elseif (stripos($ua, "Safari") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/safari.inc.php";
if ($r = bb2_safari($package)) {
return $r;
}
} elseif (stripos($ua, "Lynx") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/lynx.inc.php";
if ($r = bb2_lynx($package)) {
return $r;
}
} elseif (stripos($ua, "MovableType") !== FALSE) {
require_once BB2_CORE . "/movabletype.inc.php";
if ($r = bb2_movabletype($package)) {
return $r;
}
} elseif (stripos($ua, "msnbot") !== FALSE || stripos($ua, "MS Search") !== FALSE) {
require_once BB2_CORE . "/msnbot.inc.php";
if ($r = bb2_msnbot($package)) {
return $r;
}
} elseif (stripos($ua, "Googlebot") !== FALSE || stripos($ua, "Mediapartners-Google") !== FALSE || stripos($ua, "Google Wireless") !== FALSE) {
require_once BB2_CORE . "/google.inc.php";
if ($r = bb2_google($package)) {
return $r;
}
} elseif (stripos($ua, "Mozilla") !== FALSE && stripos($ua, "Mozilla") == 0) {
$package['is_browser'] = true;
require_once BB2_CORE . "/mozilla.inc.php";
if ($r = bb2_mozilla($package)) {
return $r;
}
}
// More intensive screening applies to POST requests
if (!strcasecmp('POST', $package['request_method'])) {
require_once BB2_CORE . "/post.inc.php";
if ($r = bb2_post($settings, $package)) {
return $r;
}
}
}
// Last chance screening.
require_once BB2_CORE . "/screener.inc.php";
bb2_screener($settings, $package);
// And that's about it.
bb2_approved($settings, $package);
return false;
}
function bb2_screen($settings, $package)
{
// Please proceed to the security checkpoint, have your identification
// and boarding pass ready, and prepare to be nakedized or fondled.
// CloudFlare-specific checks not handled by reverse proxy code
// Thanks to butchs at Simple Machines
if (array_key_exists('Cf-Connecting-Ip', $package['headers_mixed'])) {
require_once BB2_CORE . "/cloudflare.inc.php";
$r = bb2_cloudflare($package);
if ($r !== false && $r != $package['ip']) {
return $r;
}
}
// First check the whitelist
require_once BB2_CORE . "/whitelist.inc.php";
if (!bb2_run_whitelist($package)) {
// Now check the blacklist
require_once BB2_CORE . "/blacklist.inc.php";
if ($r = bb2_blacklist($package)) {
return $r;
}
// Check the http:BL
require_once BB2_CORE . "/blackhole.inc.php";
if ($r = bb2_httpbl($settings, $package)) {
if ($r == 1) {
return false;
}
# whitelisted
return $r;
}
// Check for common stuff
require_once BB2_CORE . "/common_tests.inc.php";
if ($r = bb2_protocol($settings, $package)) {
return $r;
}
if ($r = bb2_cookies($settings, $package)) {
return $r;
}
if ($r = bb2_misc_headers($settings, $package)) {
return $r;
}
// Specific checks
@($ua = $package['user_agent']);
// Search engine checks come first
if (stripos($ua, "bingbot") !== FALSE || stripos($ua, "msnbot") !== FALSE || stripos($ua, "MS Search") !== FALSE) {
require_once BB2_CORE . "/searchengine.inc.php";
if ($r = bb2_msnbot($package)) {
if ($r == 1) {
return false;
}
# whitelisted
return $r;
}
return false;
} elseif (stripos($ua, "Googlebot") !== FALSE || stripos($ua, "Mediapartners-Google") !== FALSE || stripos($ua, "Google Web Preview") !== FALSE) {
require_once BB2_CORE . "/searchengine.inc.php";
if ($r = bb2_google($package)) {
if ($r == 1) {
return false;
}
# whitelisted
return $r;
}
return false;
} elseif (stripos($ua, "Yahoo! Slurp") !== FALSE || stripos($ua, "Yahoo! SearchMonkey") !== FALSE) {
require_once BB2_CORE . "/searchengine.inc.php";
if ($r = bb2_yahoo($package)) {
if ($r == 1) {
return false;
}
# whitelisted
return $r;
}
return false;
} elseif (stripos($ua, "Baidu") !== FALSE) {
require_once BB2_CORE . "/searchengine.inc.php";
if ($r = bb2_baidu($package)) {
if ($r == 1) {
return false;
}
# whitelisted
return $r;
}
return false;
}
// MSIE checks
if (stripos($ua, "; MSIE") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/browser.inc.php";
if (stripos($ua, "Opera") !== FALSE) {
if ($r = bb2_opera($package)) {
return $r;
}
} else {
if ($r = bb2_msie($package)) {
return $r;
}
}
} elseif (stripos($ua, "Konqueror") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/browser.inc.php";
if ($r = bb2_konqueror($package)) {
return $r;
}
} elseif (stripos($ua, "Opera") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/browser.inc.php";
if ($r = bb2_opera($package)) {
return $r;
}
} elseif (stripos($ua, "Safari") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/browser.inc.php";
if ($r = bb2_safari($package)) {
return $r;
}
} elseif (stripos($ua, "Lynx") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/browser.inc.php";
if ($r = bb2_lynx($package)) {
return $r;
}
} elseif (stripos($ua, "MovableType") !== FALSE) {
require_once BB2_CORE . "/movabletype.inc.php";
if ($r = bb2_movabletype($package)) {
return $r;
}
} elseif (stripos($ua, "Mozilla") !== FALSE && stripos($ua, "Mozilla") == 0) {
$package['is_browser'] = true;
require_once BB2_CORE . "/browser.inc.php";
if ($r = bb2_mozilla($package)) {
return $r;
}
}
// More intensive screening applies to POST requests
if (!strcasecmp('POST', $package['request_method'])) {
require_once BB2_CORE . "/post.inc.php";
if ($r = bb2_post($settings, $package)) {
return $r;
}
}
}
// Last chance screening.
require_once BB2_CORE . "/screener.inc.php";
bb2_screener($settings, $package);
// And that's about it.
bb2_approved($settings, $package);
return false;
}
function bb2_start($settings)
{
global $gShellScript;
if ($gShellScript) {
return;
}
// Gather up all the information we need, first of all.
$headers = bb2_load_headers();
// Postprocess the headers to mixed-case
// FIXME: get the world to stop using PHP as CGI
$headers_mixed = array();
foreach ($headers as $h => $v) {
$headers_mixed[uc_all($h)] = $v;
}
// We use these frequently. Keep a copy close at hand.
$ip = $_SERVER['REMOTE_ADDR'];
$request_method = $_SERVER['REQUEST_METHOD'];
$request_uri = $_SERVER['REQUEST_URI'];
$server_protocol = $_SERVER['SERVER_PROTOCOL'];
$user_agent = !empty($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : NULL;
// Reconstruct the HTTP entity, if present.
$request_entity = array();
if (!strcasecmp($request_method, "POST") || !strcasecmp($request_method, "PUT")) {
foreach ($_POST as $h => $v) {
$request_entity[$h] = $v;
}
}
$package = array('ip' => $ip, 'headers' => $headers, 'headers_mixed' => $headers_mixed, 'request_method' => $request_method, 'request_uri' => $request_uri, 'server_protocol' => $server_protocol, 'request_entity' => $request_entity, 'user_agent' => $user_agent, 'is_browser' => false);
// Please proceed to the security checkpoint and have your
// identification and boarding pass ready.
// First check the whitelist
require_once BB2_CORE . "/whitelist.inc.php";
if (!($whitelisted = bb2_whitelist($package))) {
// Now check the blacklist
require_once BB2_CORE . "/blacklist.inc.php";
bb2_test($settings, $package, bb2_blacklist($package));
// Check for common stuff
require_once BB2_CORE . "/common_tests.inc.php";
bb2_test($settings, $package, bb2_protocol($settings, $package));
bb2_test($settings, $package, bb2_misc_headers($settings, $package));
// Specific checks
$ua = $headers_mixed['User-Agent'];
// MSIE checks
if (stripos($ua, "MSIE") !== FALSE) {
$package['is_browser'] = true;
if (stripos($ua, "Opera") !== FALSE) {
require_once BB2_CORE . "/opera.inc.php";
bb2_test($settings, $package, bb2_opera($package));
} else {
require_once BB2_CORE . "/msie.inc.php";
bb2_test($settings, $package, bb2_msie($package));
}
} elseif (stripos($ua, "Konqueror") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/konqueror.inc.php";
bb2_test($settings, $package, bb2_konqueror($package));
} elseif (stripos($ua, "Opera") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/opera.inc.php";
bb2_test($settings, $package, bb2_opera($package));
} elseif (stripos($ua, "Safari") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/safari.inc.php";
bb2_test($settings, $package, bb2_safari($package));
} elseif (stripos($ua, "Lynx") !== FALSE) {
$package['is_browser'] = true;
require_once BB2_CORE . "/lynx.inc.php";
bb2_test($settings, $package, bb2_lynx($package));
} elseif (stripos($ua, "MovableType") !== FALSE) {
require_once BB2_CORE . "/movabletype.inc.php";
bb2_test($settings, $package, bb2_movabletype($package));
} elseif (stripos($ua, "msnbot") !== FALSE || stripos($ua, "MS Search") !== FALSE) {
require_once BB2_CORE . "/msnbot.inc.php";
bb2_test($settings, $package, bb2_msnbot($package));
} elseif (stripos($ua, "Googlebot") !== FALSE || stripos($ua, "Mediapartners-Google") !== FALSE) {
require_once BB2_CORE . "/google.inc.php";
bb2_test($settings, $package, bb2_google($package));
} elseif (stripos($ua, "Google Keyword Tool") !== FALSE) {
bb2_approved($settings, $package);
return true;
} elseif (stripos($ua, "Mozilla") !== FALSE && stripos($ua, "Mozilla") == 0) {
$package['is_browser'] = true;
require_once BB2_CORE . "/mozilla.inc.php";
bb2_test($settings, $package, bb2_mozilla($package));
}
// More intensive screening applies to POST requests
if (!strcasecmp('POST', $package['request_method'])) {
require_once BB2_CORE . "/post.inc.php";
bb2_test($settings, $package, bb2_post($settings, $package));
}
}
// Last chance screening.
require_once BB2_CORE . "/screener.inc.php";
bb2_screener($settings, $package);
// And that's about it.
bb2_approved($settings, $package, $whitelisted);
return true;
}