+function filters_SaveCache () {
+ global $data_dir, $SpamFilters_DNScache;
+
+ if (file_exists($data_dir . "/dnscache")) {
+ $fp = fopen($data_dir . "/dnscache", "r");
+ } else {
+ $fp = false;
+ }
+ if ($fp) {
+ flock($fp,LOCK_EX);
+ } else {
+ $fp = fopen($data_dir . "/dnscache", "w+");
+ fclose($fp);
+ $fp = fopen($data_dir . "/dnscache", "r");
+ flock($fp,LOCK_EX);
+ }
+ $fp1=fopen($data_dir . "/dnscache", "w+");
+
+ foreach ($SpamFilters_DNScache as $Key=> $Value) {
+ $tstr = $Key . ',' . $Value['L'] . ',' . $Value['T'] . "\n";
+ fputs ($fp1, $tstr);
+ }
+ fclose($fp1);
+ flock($fp,LOCK_UN);
+ fclose($fp);
+}
+
+
+function filters_LoadCache () {
+ global $data_dir, $SpamFilters_DNScache;
+
+ if (file_exists($data_dir . "/dnscache")) {
+ $SpamFilters_DNScache = array();
+ if ($fp = fopen ($data_dir . "/dnscache", "r")) {
+ flock($fp,LOCK_SH);
+ while ($data=fgetcsv($fp,1024)) {
+ if ($data[2] > time()) {
+ $SpamFilters_DNScache[$data[0]]['L'] = $data[1];
+ $SpamFilters_DNScache[$data[0]]['T'] = $data[2];
+ }
+ }
+
+ flock($fp,LOCK_UN);
+ }
+ }
+}
+
+function filters_bulkquery($filters_spam_scan, $filters, $read) {
+ global $SpamFilters_YourHop, $attachment_dir, $username,
+ $SpamFilters_DNScache, $SpamFilters_BulkQuery,
+ $SpamFilters_CacheTTL;
+
+ $IPs = array();
+ $i = 0;
+ while ($i < count($read)) {
+ // EIMS will give funky results
+ $Chunks = explode(' ', $read[$i]);
+ if ($Chunks[0] != '*') {
+ $i ++;
+ continue;
+ }
+ $MsgNum = $Chunks[1];
+
+ $i ++;
+
+ // Look through all of the Received headers for IP addresses
+ // Stop when I get ")" on a line
+ // Stop if I get "*" on a line (don't advance)
+ // and above all, stop if $i is bigger than the total # of lines
+ while (($i < count($read)) &&
+ ($read[$i][0] != ')' && $read[$i][0] != '*' &&
+ $read[$i][0] != "\n")) {
+ // Check to see if this line is the right "Received from" line
+ // to check
+ if (is_int(strpos($read[$i], $SpamFilters_YourHop))) {
+ $read[$i] = ereg_replace('[^0-9\.]', ' ', $read[$i]);
+ $elements = explode(' ', $read[$i]);
+ foreach ($elements as $value) {
+ if ($value != '' &&
+ ereg('[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}',
+ $value, $regs)) {
+ $Chunks = explode('.', $value);
+ $IP = $Chunks[3] . '.' . $Chunks[2] . '.' .
+ $Chunks[1] . '.' . $Chunks[0];
+ foreach ($filters as $key => $value) {
+ if ($filters[$key]['enabled'] &&
+ $filters[$key]['dns']) {
+ if (strlen($SpamFilters_DNScache[$IP.'.'.$filters[$key]['dns']]) == 0) {
+ $IPs[$IP] = true;
+ break;
+ }
+ }
+ }
+ // If we've checked one IP and YourHop is
+ // just a space
+ if ($SpamFilters_YourHop == ' ') {
+ break; // don't check any more
+ }
+ }
+ }
+ }
+ $i ++;
+ }
+ }
+
+ if (count($IPs) > 0) {
+ $rbls = array();
+ foreach ($filters as $key => $value) {
+ if ($filters[$key]['enabled']) {
+ if ($filters[$key]['dns']) {
+ $rbls[$filters[$key]['dns']] = true;
+ }
+ }
+ }
+
+ $bqfil = $attachment_dir . $username . "-bq.in";
+ $fp = fopen($bqfil, "w");
+ fputs ($fp, $SpamFilters_CacheTTL . "\n");
+ foreach ($rbls as $key => $value) {
+ fputs ($fp, "." . $key . "\n");
+ }
+ fputs ($fp, "----------\n");
+ foreach ($IPs as $key => $value) {
+ fputs ($fp, $key . "\n");
+ }
+ fclose ($fp);
+ $bqout = array();
+ exec ($SpamFilters_BulkQuery . " < " . $bqfil, $bqout);
+ foreach ($bqout as $value) {
+ $Chunks = explode(',', $value);
+ $SpamFilters_DNScache[$Chunks[0]]['L'] = $Chunks[1];
+ $SpamFilters_DNScache[$Chunks[0]]['T'] = $Chunks[2] + time();
+ }
+ unlink($bqfil);
+ }
+}
+
+