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<?php
/**
* Deliver.class.php
*
* This contains all the functions needed to send messages through
* a delivery backend.
*
* @author Marc Groot Koerkamp
* @copyright © 1999-2006 The SquirrelMail Project Team
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @version $Id: Deliver.class.php,v 1.61 2006/01/23 18:39:32 tokul Exp $
* @package squirrelmail
*/
/**
* Deliver Class - called to actually deliver the message
*
* This class is called by compose.php and other code that needs
* to send messages. All delivery functionality should be centralized
* in this class.
*
* Do not place UI code in this class, as UI code should be placed in templates
* going forward.
*
* @author Marc Groot Koerkamp
* @package squirrelmail
*/
class Deliver {
/**
* function mail - send the message parts to the SMTP stream
*
* @param Message $message Message class to send
* @param resource $stream file handle to the SMTP stream
*
* @return integer $raw_length
*/
function mail($message, $stream=false) {
$rfc822_header = $message->rfc822_header;
if (count($message->entities)) {
$boundary = $this->mimeBoundary();
$rfc822_header->content_type->properties['boundary']='"'.$boundary.'"';
} else {
$boundary='';
}
$raw_length = 0;
$reply_rfc822_header = (isset($message->reply_rfc822_header)
? $message->reply_rfc822_header : '');
$header = $this->prepareRFC822_Header($rfc822_header, $reply_rfc822_header, $raw_length);
if ($stream) {
$this->preWriteToStream($header);
$this->writeToStream($stream, $header);
}
$this->writeBody($message, $stream, $raw_length, $boundary);
return $raw_length;
}
/**
* function writeBody - generate and write the mime boundaries around each part to the stream
*
* Recursively formats and writes the MIME boundaries of the $message
* to the output stream.
*
* @param Message $message Message object to transform
* @param resource $stream SMTP output stream
* @param integer &$length_raw raw length of the message (part)
* as returned by mail fn
* @param string $boundary custom boundary to call, usually for subparts
*
* @return void
*/
function writeBody($message, $stream, &$length_raw, $boundary='') {
// calculate boundary in case of multidimensional mime structures
if ($boundary && $message->entity_id && count($message->entities)) {
if (strpos($boundary,'_part_')) {
$boundary = substr($boundary,0,strpos($boundary,'_part_'));
// the next four lines use strrev to reverse any nested boundaries
// because RFC 2046 (5.1.1) says that if a line starts with the outer
// boundary string (doesn't matter what the line ends with), that
// can be considered a match for the outer boundary; thus the nested
// boundary needs to be unique from the outer one
//
} else if (strpos($boundary,'_trap_')) {
$boundary = substr(strrev($boundary),0,strpos(strrev($boundary),'_part_'));
}
$boundary_new = strrev($boundary . '_part_'.$message->entity_id);
} else {
$boundary_new = $boundary;
}
if ($boundary && !$message->rfc822_header) {
$s = '--'.$boundary."\r\n";
$s .= $this->prepareMIME_Header($message, $boundary_new);
$length_raw += strlen($s);
if ($stream) {
$this->preWriteToStream($s);
$this->writeToStream($stream, $s);
}
}
$this->writeBodyPart($message, $stream, $length_raw);
$last = false;
for ($i=0, $entCount=count($message->entities);$i<$entCount;$i++) {
$msg = $this->writeBody($message->entities[$i], $stream, $length_raw, $boundary_new);
if ($i == $entCount-1) $last = true;
}
if ($boundary && $last) {
$s = "--".$boundary_new."--\r\n\r\n";
$length_raw += strlen($s);
if ($stream) {
$this->preWriteToStream($s);
$this->writeToStream($stream, $s);
}
}
}
/**
* function writeBodyPart - write each individual mimepart
*
* Recursively called by WriteBody to write each mime part to the SMTP stream
*
* @param Message $message Message object to transform
* @param resource $stream SMTP output stream
* @param integer &$length length of the message part
* as returned by mail fn
*
* @return void
*/
function writeBodyPart($message, $stream, &$length) {
if ($message->mime_header) {
$type0 = $message->mime_header->type0;
} else {
$type0 = $message->rfc822_header->content_type->type0;
}
$body_part_trailing = $last = '';
switch ($type0)
{
case 'text':
case 'message':
if ($message->body_part) {
$body_part = $message->body_part;
// remove NUL characters
$body_part = str_replace("\0",'',$body_part);
$length += $this->clean_crlf($body_part);
if ($stream) {
$this->preWriteToStream($body_part);
$this->writeToStream($stream, $body_part);
}
$last = $body_part;
} elseif ($message->att_local_name) {
$filename = $message->att_local_name;
$file = fopen ($filename, 'rb');
while ($body_part = fgets($file, 4096)) {
// remove NUL characters
$body_part = str_replace("\0",'',$body_part);
$length += $this->clean_crlf($body_part);
if ($stream) {
$this->preWriteToStream($body_part);
$this->writeToStream($stream, $body_part);
}
$last = $body_part;
}
fclose($file);
}
break;
default:
if ($message->body_part) {
$body_part = $message->body_part;
// remove NUL characters
$body_part = str_replace("\0",'',$body_part);
$length += $this->clean_crlf($body_part);
if ($stream) {
$this->writeToStream($stream, $body_part);
}
} elseif ($message->att_local_name) {
$filename = $message->att_local_name;
$file = fopen ($filename, 'rb');
while ($tmp = fread($file, 570)) {
$body_part = chunk_split(base64_encode($tmp));
// Up to 4.3.10 chunk_split always appends a newline,
// while in 4.3.11 it doesn't if the string to split
// is shorter than the chunk length.
if( substr($body_part, -1 , 1 ) != "\n" )
$body_part .= "\n";
$length += $this->clean_crlf($body_part);
if ($stream) {
$this->writeToStream($stream, $body_part);
}
}
fclose($file);
}
break;
}
$body_part_trailing = '';
if ($last && substr($last,-1) != "\n") {
$body_part_trailing = "\r\n";
}
if ($body_part_trailing) {
$length += strlen($body_part_trailing);
if ($stream) {
$this->preWriteToStream($body_part_trailing);
$this->writeToStream($stream, $body_part_trailing);
}
}
}
/**
* function clean_crlf - change linefeeds and newlines to legal characters
*
* The SMTP format only allows CRLF as line terminators.
* This function replaces illegal teminators with the correct terminator.
*
* @param string &$s string to clean linefeeds on
*
* @return void
*/
function clean_crlf(&$s) {
$s = str_replace("\r\n", "\n", $s);
$s = str_replace("\r", "\n", $s);
$s = str_replace("\n", "\r\n", $s);
return strlen($s);
}
/**
* function strip_crlf - strip linefeeds and newlines from a string
*
* The SMTP format only allows CRLF as line terminators.
* This function strips all line terminators from the string.
*
* @param string &$s string to clean linefeeds on
*
* @return void
*/
function strip_crlf(&$s) {
$s = str_replace("\r\n ", '', $s);
$s = str_replace("\r", '', $s);
$s = str_replace("\n", '', $s);
}
/**
* function preWriteToStream - reserved for extended functionality
*
* This function is not yet implemented.
* Reserved for extended functionality.
*
* @param string &$s string to operate on
*
* @return void
*/
function preWriteToStream(&$s) {
}
/**
* function writeToStream - write data to the SMTP stream
*
* @param resource $stream SMTP output stream
* @param string $data string with data to send to the SMTP stream
*
* @return void
*/
function writeToStream($stream, $data) {
fputs($stream, $data);
}
/**
* function initStream - reserved for extended functionality
*
* This function is not yet implemented.
* Reserved for extended functionality.
*
* @param Message $message Message object
* @param string $host host name or IP to connect to
* @param string $user username to log into the SMTP server with
* @param string $pass password to log into the SMTP server with
* @param integer $length
*
* @return handle $stream file handle resource to SMTP stream
*/
function initStream($message, $length=0, $host='', $port='', $user='', $pass='') {
return $stream;
}
/**
* function getBCC - reserved for extended functionality
*
* This function is not yet implemented.
* Reserved for extended functionality.
*
*/
function getBCC() {
return false;
}
/**
* function prepareMIME_Header - creates the mime header
*
* @param Message $message Message object to act on
* @param string $boundary mime boundary from fn MimeBoundary
*
* @return string $header properly formatted mime header
*/
function prepareMIME_Header($message, $boundary) {
$mime_header = $message->mime_header;
$rn="\r\n";
$header = array();
$contenttype = 'Content-Type: '. $mime_header->type0 .'/'.
$mime_header->type1;
if (count($message->entities)) {
$contenttype .= ';' . 'boundary="'.$boundary.'"';
}
if (isset($mime_header->parameters['name'])) {
$contenttype .= '; name="'.
encodeHeader($mime_header->parameters['name']). '"';
}
if (isset($mime_header->parameters['charset'])) {
$charset = $mime_header->parameters['charset'];
$contenttype .= '; charset="'.
encodeHeader($charset). '"';
}
$header[] = $contenttype . $rn;
if ($mime_header->description) {
$header[] = 'Content-Description: ' . $mime_header->description . $rn;
}
if ($mime_header->encoding) {
$header[] = 'Content-Transfer-Encoding: ' . $mime_header->encoding . $rn;
} else {
if ($mime_header->type0 == 'text' || $mime_header->type0 == 'message') {
$header[] = 'Content-Transfer-Encoding: 8bit' . $rn;
} else {
$header[] = 'Content-Transfer-Encoding: base64' . $rn;
}
}
if ($mime_header->id) {
$header[] = 'Content-ID: ' . $mime_header->id . $rn;
}
if ($mime_header->disposition) {
$disposition = $mime_header->disposition;
$contentdisp = 'Content-Disposition: ' . $disposition->name;
if ($disposition->getProperty('filename')) {
$contentdisp .= '; filename="'.
encodeHeader($disposition->getProperty('filename')). '"';
}
$header[] = $contentdisp . $rn;
}
if ($mime_header->md5) {
$header[] = 'Content-MD5: ' . $mime_header->md5 . $rn;
}
if ($mime_header->language) {
$header[] = 'Content-Language: ' . $mime_header->language . $rn;
}
$cnt = count($header);
$hdr_s = '';
for ($i = 0 ; $i < $cnt ; $i++) {
$hdr_s .= $this->foldLine($header[$i], 78,str_pad('',4));
}
$header = $hdr_s;
$header .= $rn; /* One blank line to separate mimeheader and body-entity */
return $header;
}
/**
* function prepareRFC822_Header - prepares the RFC822 header string from Rfc822Header object(s)
*
* This function takes the Rfc822Header object(s) and formats them
* into the RFC822Header string to send to the SMTP server as part
* of the SMTP message.
*
* @param Rfc822Header $rfc822_header
* @param Rfc822Header $reply_rfc822_header
* @param integer &$raw_length length of the message
*
* @return string $header
*/
function prepareRFC822_Header($rfc822_header, $reply_rfc822_header, &$raw_length) {
global $domain, $version, $username, $encode_header_key,
$edit_identity, $hide_auth_header;
/* if server var SERVER_NAME not available, use $domain */
if(!sqGetGlobalVar('SERVER_NAME', $SERVER_NAME, SQ_SERVER)) {
$SERVER_NAME = $domain;
}
sqGetGlobalVar('REMOTE_ADDR', $REMOTE_ADDR, SQ_SERVER);
sqGetGlobalVar('REMOTE_PORT', $REMOTE_PORT, SQ_SERVER);
sqGetGlobalVar('REMOTE_HOST', $REMOTE_HOST, SQ_SERVER);
sqGetGlobalVar('HTTP_VIA', $HTTP_VIA, SQ_SERVER);
sqGetGlobalVar('HTTP_X_FORWARDED_FOR', $HTTP_X_FORWARDED_FOR, SQ_SERVER);
$rn = "\r\n";
/* This creates an RFC 822 date */
$date = date('D, j M Y H:i:s ', mktime()) . $this->timezone();
/* Create a message-id */
$message_id = '<' . $REMOTE_PORT . '.';
if (isset($encode_header_key) && trim($encode_header_key)!='') {
// use encrypted form of remote address
$message_id.= OneTimePadEncrypt($this->ip2hex($REMOTE_ADDR),base64_encode($encode_header_key));
} else {
$message_id.= $REMOTE_ADDR;
}
$message_id .= '.' . time() . '.squirrel@' . $SERVER_NAME .'>';
/* Make an RFC822 Received: line */
if (isset($REMOTE_HOST)) {
$received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
} else {
$received_from = $REMOTE_ADDR;
}
if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
if (!isset($HTTP_X_FORWARDED_FOR) || $HTTP_X_FORWARDED_FOR == '') {
$HTTP_X_FORWARDED_FOR = 'unknown';
}
$received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
}
$header = array();
/**
* SquirrelMail header
*
* This Received: header provides information that allows to track
* user and machine that was used to send email. Don't remove it
* unless you understand all possible forging issues or your
* webmail installation does not prevent changes in user's email address.
* See SquirrelMail bug tracker #847107 for more details about it.
*
* Add $hide_squirrelmail_header as a candidate for config_local.php
* to allow completely hiding SquirrelMail participation in message
* processing; This is dangerous, especially if users can modify their
* account information, as it makes mapping a sent message back to the
* original sender almost impossible.
*/
$show_sm_header = ( defined('hide_squirrelmail_header') ? ! hide_squirrelmail_header : 1 );
if ( $show_sm_header ) {
if (isset($encode_header_key) &&
trim($encode_header_key)!='') {
// use encoded headers, if encryption key is set and not empty
$header[] = 'X-Squirrel-UserHash: '.OneTimePadEncrypt($username,base64_encode($encode_header_key)).$rn;
$header[] = 'X-Squirrel-FromHash: '.OneTimePadEncrypt($this->ip2hex($REMOTE_ADDR),base64_encode($encode_header_key)).$rn;
if (isset($HTTP_X_FORWARDED_FOR))
$header[] = 'X-Squirrel-ProxyHash:'.OneTimePadEncrypt($this->ip2hex($HTTP_X_FORWARDED_FOR),base64_encode($encode_header_key)).$rn;
} else {
// use default received headers
$header[] = "Received: from $received_from" . $rn;
if ($edit_identity || ! isset($hide_auth_header) || ! $hide_auth_header)
$header[] = " (SquirrelMail authenticated user $username)" . $rn;
$header[] = " by $SERVER_NAME with HTTP;" . $rn;
$header[] = " $date" . $rn;
}
}
/* Insert the rest of the header fields */
$header[] = 'Message-ID: '. $message_id . $rn;
if (is_object($reply_rfc822_header) &&
isset($reply_rfc822_header->message_id) &&
$reply_rfc822_header->message_id) {
$rep_message_id = $reply_rfc822_header->message_id;
// $this->strip_crlf($message_id);
$header[] = 'In-Reply-To: '.$rep_message_id . $rn;
$references = $this->calculate_references($reply_rfc822_header);
$header[] = 'References: '.$references . $rn;
}
$header[] = "Date: $date" . $rn;
$header[] = 'Subject: '.encodeHeader($rfc822_header->subject) . $rn;
$header[] = 'From: '. $rfc822_header->getAddr_s('from',",$rn ",true) . $rn;
// folding address list [From|To|Cc|Bcc] happens by using ",$rn<space>"
// as delimiter
// Do not use foldLine for that.
// RFC2822 if from contains more then 1 address
if (count($rfc822_header->from) > 1) {
$header[] = 'Sender: '. $rfc822_header->getAddr_s('sender',',',true) . $rn;
}
if (count($rfc822_header->to)) {
$header[] = 'To: '. $rfc822_header->getAddr_s('to',",$rn ",true) . $rn;
}
if (count($rfc822_header->cc)) {
$header[] = 'Cc: '. $rfc822_header->getAddr_s('cc',",$rn ",true) . $rn;
}
if (count($rfc822_header->reply_to)) {
$header[] = 'Reply-To: '. $rfc822_header->getAddr_s('reply_to',',',true) . $rn;
}
/* Sendmail should return true. Default = false */
$bcc = $this->getBcc();
if (count($rfc822_header->bcc)) {
$s = 'Bcc: '. $rfc822_header->getAddr_s('bcc',",$rn ",true) . $rn;
if (!$bcc) {
$raw_length += strlen($s);
} else {
$header[] = $s;
}
}
/* Identify SquirrelMail */
$header[] = 'User-Agent: SquirrelMail/' . $version . $rn;
/* Do the MIME-stuff */
$header[] = 'MIME-Version: 1.0' . $rn;
$contenttype = 'Content-Type: '. $rfc822_header->content_type->type0 .'/'.
$rfc822_header->content_type->type1;
if (count($rfc822_header->content_type->properties)) {
foreach ($rfc822_header->content_type->properties as $k => $v) {
if ($k && $v) {
$contenttype .= ';' .$k.'='.$v;
}
}
}
$header[] = $contenttype . $rn;
if ($encoding = $rfc822_header->encoding) {
$header[] = 'Content-Transfer-Encoding: ' . $encoding . $rn;
}
if ($rfc822_header->dnt) {
$dnt = $rfc822_header->getAddr_s('dnt');
/* Pegasus Mail */
$header[] = 'X-Confirm-Reading-To: '.$dnt. $rn;
/* RFC 2298 */
$header[] = 'Disposition-Notification-To: '.$dnt. $rn;
}
if ($rfc822_header->priority) {
switch($rfc822_header->priority)
{
case 1:
$header[] = 'X-Priority: 1 (Highest)'.$rn;
$header[] = 'Importance: High'. $rn; break;
case 5:
$header[] = 'X-Priority: 5 (Lowest)'.$rn;
$header[] = 'Importance: Low'. $rn; break;
default: break;
}
}
/* Insert headers from the $more_headers array */
if(count($rfc822_header->more_headers)) {
reset($rfc822_header->more_headers);
foreach ($rfc822_header->more_headers as $k => $v) {
$header[] = $k.': '.$v .$rn;
}
}
$cnt = count($header);
$hdr_s = '';
for ($i = 0 ; $i < $cnt ; $i++) {
$sKey = substr($header[$i],0,strpos($header[$i],':'));
switch ($sKey)
{
case 'Message-ID':
case 'In-Reply_To':
$hdr_s .= $header[$i];
break;
case 'References':
$sRefs = substr($header[$i],12);
$aRefs = explode(' ',$sRefs);
$sLine = 'References:';
foreach ($aRefs as $sReference) {
if (strlen($sLine)+strlen($sReference) >76) {
$hdr_s .= $sLine;
$sLine = $rn . ' ' . $sReference;
} else {
$sLine .= ' '. $sReference;
}
}
$hdr_s .= $sLine;
break;
case 'To':
case 'Cc':
case 'Bcc':
case 'From':
$hdr_s .= $header[$i];
break;
default: $hdr_s .= $this->foldLine($header[$i], 78, str_pad('',4)); break;
}
}
$header = $hdr_s;
$header .= $rn; /* One blank line to separate header and body */
$raw_length += strlen($header);
return $header;
}
/**
* function foldLine - for cleanly folding of headerlines
*
* @param string $line
* @param integer $length length to fold the line at
* @param string $pre prefix the line with...
*
* @return string $line folded line with trailing CRLF
*/
function foldLine($line, $length, $pre='') {
$line = substr($line,0, -2);
$length -= 2; /* do not fold between \r and \n */
$cnt = strlen($line);
if ($cnt > $length) { /* try folding */
$fold_string = "\r\n " . $pre;
$bFirstFold = false;
$aFoldLine = array();
while (strlen($line) > $length) {
$fold = false;
/* handle encoded parts */
if (preg_match('/(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(\s+|.*)/Ui',$line,$regs)) {
$fold_tmp = $regs[1];
if (!trim($regs[5])) {
$fold_tmp .= $regs[5];
}
$iPosEnc = strpos($line,$fold_tmp);
$iLengthEnc = strlen($fold_tmp);
$iPosEncEnd = $iPosEnc+$iLengthEnc;
if ($iPosEnc < $length && (($iPosEncEnd) > $length)) {
$fold = true;
/* fold just before the start of the encoded string */
if ($iPosEnc) {
$aFoldLine[] = substr($line,0,$iPosEnc);
}
$line = substr($line,$iPosEnc);
if (!$bFirstFold) {
$bFirstFold = true;
$length -= strlen($fold_string);
}
if ($iLengthEnc > $length) { /* place the encoded
string on a separate line and do not fold inside it*/
/* minimize foldstring */
$fold_string = "\r\n ";
$aFoldLine[] = substr($line,0,$iLengthEnc);
$line = substr($line,$iLengthEnc);
}
} else if ($iPosEnc < $length) { /* the encoded string fits into the foldlength */
/*remainder */
$sLineRem = substr($line,$iPosEncEnd,$length - $iPosEncEnd);
if (preg_match('/^(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(.*)/Ui',$sLineRem) || !preg_match('/[=,;\s]/',$sLineRem)) {
/*impossible to fold clean in the next part -> fold after the enc string */
$aFoldLine[] = substr($line,0,$iPosEncEnd);
$line = substr($line,$iPosEncEnd);
$fold = true;
if (!$bFirstFold) {
$bFirstFold = true;
$length -= strlen($fold_string);
}
}
}
}
if (!$fold) {
$line_tmp = substr($line,0,$length);
$iFoldPos = false;
/* try to fold at logical places */
switch (true)
{
case ($iFoldPos = strrpos($line_tmp,',')): break;
case ($iFoldPos = strrpos($line_tmp,';')): break;
case ($iFoldPos = strrpos($line_tmp,' ')): break;
case ($iFoldPos = strrpos($line_tmp,'=')): break;
default: break;
}
if (!$iFoldPos) { /* clean folding didn't work */
$iFoldPos = $length;
}
$aFoldLine[] = substr($line,0,$iFoldPos+1);
$line = substr($line,$iFoldPos+1);
if (!$bFirstFold) {
$bFirstFold = true;
$length -= strlen($fold_string);
}
}
}
/*$reconstruct the line */
if ($line) {
$aFoldLine[] = $line;
}
$line = implode($fold_string,$aFoldLine);
}
return $line."\r\n";
}
/**
* function mimeBoundary - calculates the mime boundary to use
*
* This function will generate a random mime boundary base part
* for the message if the boundary has not already been set.
*
* @return string $mimeBoundaryString random mime boundary string
*/
function mimeBoundary () {
static $mimeBoundaryString;
if ( !isset( $mimeBoundaryString ) ||
$mimeBoundaryString == '') {
$mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
mt_rand( 10000, 99999 );
}
return $mimeBoundaryString;
}
/**
* function timezone - Time offset for correct timezone
*
* @return string $result with timezone and offset
*/
function timezone () {
global $invert_time;
$diff_second = date('Z');
if ($invert_time) {
$diff_second = - $diff_second;
}
if ($diff_second > 0) {
$sign = '+';
} else {
$sign = '-';
}
$diff_second = abs($diff_second);
$diff_hour = floor ($diff_second / 3600);
$diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
$zonename = '('.strftime('%Z').')';
$result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute,
$zonename);
return ($result);
}
/**
* function calculate_references - calculate correct Referer string
*
* @param Rfc822Header $hdr message header to calculate from
*
* @return string $refer concatenated and trimmed Referer string
*/
function calculate_references($hdr) {
$refer = $hdr->references;
$message_id = $hdr->message_id;
$in_reply_to = $hdr->in_reply_to;
if (strlen($refer) > 2) {
$refer .= ' ' . $message_id;
} else {
if ($in_reply_to) {
$refer .= $in_reply_to . ' ' . $message_id;
} else {
$refer .= $message_id;
}
}
trim($refer);
return $refer;
}
/**
* Converts ip address to hexadecimal string
*
* Function is used to convert ipv4 and ipv6 addresses to hex strings.
* It removes all delimiter symbols from ip addresses, converts decimal
* ipv4 numbers to hex and pads strings in order to present full length
* address. ipv4 addresses are represented as 8 byte strings, ipv6 addresses
* are represented as 32 byte string.
*
* If function fails to detect address format, it returns unprocessed string.
* @param string $string ip address string
* @return string processed ip address string
* @since 1.5.1 and 1.4.5
*/
function ip2hex($string) {
if (preg_match("/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/",$string,$match)) {
// ipv4 address
$ret = str_pad(dechex($match[1]),2,'0',STR_PAD_LEFT)
. str_pad(dechex($match[2]),2,'0',STR_PAD_LEFT)
. str_pad(dechex($match[3]),2,'0',STR_PAD_LEFT)
. str_pad(dechex($match[4]),2,'0',STR_PAD_LEFT);
} elseif (preg_match("/^([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)$/i",$string,$match)) {
// full ipv6 address
$ret = str_pad($match[1],4,'0',STR_PAD_LEFT)
. str_pad($match[2],4,'0',STR_PAD_LEFT)
. str_pad($match[3],4,'0',STR_PAD_LEFT)
. str_pad($match[4],4,'0',STR_PAD_LEFT)
. str_pad($match[5],4,'0',STR_PAD_LEFT)
. str_pad($match[6],4,'0',STR_PAD_LEFT)
. str_pad($match[7],4,'0',STR_PAD_LEFT)
. str_pad($match[8],4,'0',STR_PAD_LEFT);
} elseif (preg_match("/^\:\:([0-9a-h\:]+)$/i",$string,$match)) {
// short ipv6 with all starting symbols nulled
$aAddr=explode(':',$match[1]);
$ret='';
foreach ($aAddr as $addr) {
$ret.=str_pad($addr,4,'0',STR_PAD_LEFT);
}
$ret=str_pad($ret,32,'0',STR_PAD_LEFT);
} elseif (preg_match("/^([0-9a-h\:]+)::([0-9a-h\:]+)$/i",$string,$match)) {
// short ipv6 with middle part nulled
$aStart=explode(':',$match[1]);
$sStart='';
foreach($aStart as $addr) {
$sStart.=str_pad($addr,4,'0',STR_PAD_LEFT);
}
$aEnd = explode(':',$match[2]);
$sEnd='';
foreach($aEnd as $addr) {
$sEnd.=str_pad($addr,4,'0',STR_PAD_LEFT);
}
$ret = $sStart
. str_pad('',(32 - strlen($sStart . $sEnd)),'0',STR_PAD_LEFT)
. $sEnd;
} else {
// unknown addressing
$ret = $string;
}
return $ret;
}
}
?>
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