Prevent endless recursive sent subfolder names - see: http://thread.gmane.org/gmane...
[squirrelmail.git] / class / deliver / Deliver.class.php
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4960ec8e 1<?php
4b4abf93 2
69298c28 3/**
4 * Deliver.class.php
5 *
69298c28 6 * This contains all the functions needed to send messages through
7 * a delivery backend.
8 *
4b4abf93 9 * @author Marc Groot Koerkamp
c0d96801 10 * @copyright 1999-2012 The SquirrelMail Project Team
4b4abf93 11 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
883d9cd3 12 * @version $Id$
72b004e6 13 * @package squirrelmail
69298c28 14 */
15
72b004e6 16/**
17 * Deliver Class - called to actually deliver the message
18 *
19 * This class is called by compose.php and other code that needs
20 * to send messages. All delivery functionality should be centralized
21 * in this class.
22 *
23 * Do not place UI code in this class, as UI code should be placed in templates
24 * going forward.
25 *
26 * @author Marc Groot Koerkamp
27 * @package squirrelmail
28 */
4960ec8e 29class Deliver {
30
72b004e6 31 /**
32 * function mail - send the message parts to the SMTP stream
33 *
0fdb0aa1 34 * @param Message $message Message object to send
10adeb76 35 * NOTE that this is passed by
36 * reference and will be modified
37 * upon return with updated
38 * fields such as Message ID, References,
39 * In-Reply-To and Date headers.
40 * @param resource $stream Handle to the outgoing stream
e2ccf284 41 * (when FALSE, nothing will be
42 * written to the stream; this can
43 * be used to determine the actual
44 * number of bytes that will be
45 * written to the stream)
0fdb0aa1 46 * @param string $reply_id Identifies message being replied to
47 * (OPTIONAL; caller should ONLY specify
48 * a value for this when the message
49 * being sent is a reply)
50 * @param string $reply_ent_id Identifies message being replied to
51 * in the case it was an embedded/attached
52 * message inside another (OPTIONAL; caller
53 * should ONLY specify a value for this
54 * when the message being sent is a reply)
69bb88aa 55 * @param resource $imap_stream If there is an open IMAP stream in
56 * the caller's context, it should be
57 * passed in here. This is OPTIONAL,
58 * as one will be created if not given,
59 * but as some IMAP servers may baulk
60 * at opening more than one connection
61 * at a time, the caller should always
62 * abide if possible. Currently, this
63 * stream is only used when $reply_id
64 * is also non-zero, but that is subject
65 * to change.
33f0da43 66 * @param mixed $extra Any implementation-specific variables
67 * can be passed in here and used in
68 * an overloaded version of this method
69 * if needed.
72b004e6 70 *
10adeb76 71 * @return integer The number of bytes written (or that would have been
72 * written) to the output stream.
b67d61ee 73 *
72b004e6 74 */
10adeb76 75 function mail(&$message, $stream=false, $reply_id=0, $reply_ent_id=0,
33f0da43 76 $imap_stream=NULL, $extra=NULL) {
e2ccf284 77
10adeb76 78 $rfc822_header = &$message->rfc822_header;
79
78f39e78 80 if (count($message->entities)) {
81 $boundary = $this->mimeBoundary();
82 $rfc822_header->content_type->properties['boundary']='"'.$boundary.'"';
83 } else {
84 $boundary='';
85 }
86 $raw_length = 0;
0fdb0aa1 87
88
89 // calculate reply header if needed
90 //
91 if ($reply_id) {
92 global $imapConnection, $username, $imapServerAddress,
93 $imapPort, $mailbox;
e2ccf284 94
69bb88aa 95 // try our best to use an existing IMAP handle
96 //
97 $close_imap_stream = FALSE;
98 if (is_resource($imap_stream)) {
99 $my_imap_stream = $imap_stream;
100
101 } else if (is_resource($imapConnection)) {
102 $my_imap_stream = $imapConnection;
103
104 } else {
105 $close_imap_stream = TRUE;
106 $my_imap_stream = sqimap_login($username, FALSE,
0fdb0aa1 107 $imapServerAddress, $imapPort, 0);
69bb88aa 108 }
109
110 sqimap_mailbox_select($my_imap_stream, $mailbox);
111 $reply_message = sqimap_get_message($my_imap_stream, $reply_id, $mailbox);
0fdb0aa1 112
69bb88aa 113 if ($close_imap_stream) {
114 sqimap_logout($my_imap_stream);
115 }
0fdb0aa1 116
117 if ($reply_ent_id) {
118 /* redefine the messsage in case of message/rfc822 */
119 $reply_message = $message->getEntity($reply_ent_id);
120 /* message is an entity which contains the envelope and type0=message
121 * and type1=rfc822. The actual entities are childs from
122 * $reply_message->entities[0]. That's where the encoding and is located
123 */
124
125 $orig_header = $reply_message->rfc822_header; /* here is the envelope located */
126
127 } else {
128 $orig_header = $reply_message->rfc822_header;
129 }
08e33475 130 $message->reply_rfc822_header = $orig_header;
0fdb0aa1 131 }
0fdb0aa1 132
133
72b004e6 134 $reply_rfc822_header = (isset($message->reply_rfc822_header)
78f39e78 135 ? $message->reply_rfc822_header : '');
136 $header = $this->prepareRFC822_Header($rfc822_header, $reply_rfc822_header, $raw_length);
75b14a70 137
e2ccf284 138 $this->send_mail($message, $header, $boundary, $stream, $raw_length, $extra);
139
10adeb76 140 return $raw_length;
e2ccf284 141 }
142
143 /**
144 * function send_mail - send the message parts to the IMAP stream
145 *
146 * @param Message $message Message object to send
147 * @param string $header Headers ready to send
148 * @param string $boundary Message parts boundary
149 * @param resource $stream Handle to the SMTP stream
150 * (when FALSE, nothing will be
151 * written to the stream; this can
152 * be used to determine the actual
153 * number of bytes that will be
154 * written to the stream)
155 * @param int &$raw_length The number of bytes written (or that
156 * would have been written) to the
157 * output stream - NOTE that this is
158 * passed by reference
159 * @param mixed $extra Any implementation-specific variables
160 * can be passed in here and used in
161 * an overloaded version of this method
162 * if needed.
163 *
164 * @return void
165 *
166 */
167 function send_mail($message, $header, $boundary, $stream=false,
168 &$raw_length, $extra=NULL) {
169
170
78f39e78 171 if ($stream) {
59387d1c 172 $this->preWriteToStream($header);
173 $this->writeToStream($stream, $header);
78f39e78 174 }
175 $this->writeBody($message, $stream, $raw_length, $boundary);
3b53d87f 176 }
78f39e78 177
72b004e6 178 /**
179 * function writeBody - generate and write the mime boundaries around each part to the stream
180 *
181 * Recursively formats and writes the MIME boundaries of the $message
182 * to the output stream.
183 *
184 * @param Message $message Message object to transform
185 * @param resource $stream SMTP output stream
e2ccf284 186 * (when FALSE, nothing will be
187 * written to the stream; this can
188 * be used to determine the actual
189 * number of bytes that will be
190 * written to the stream)
72b004e6 191 * @param integer &$length_raw raw length of the message (part)
192 * as returned by mail fn
193 * @param string $boundary custom boundary to call, usually for subparts
194 *
3a70ee56 195 * @return void
72b004e6 196 */
3b53d87f 197 function writeBody($message, $stream, &$length_raw, $boundary='') {
caf6a9a4 198 // calculate boundary in case of multidimensional mime structures
199 if ($boundary && $message->entity_id && count($message->entities)) {
200 if (strpos($boundary,'_part_')) {
201 $boundary = substr($boundary,0,strpos($boundary,'_part_'));
ba86230e 202
593d083d 203 // the next four lines use strrev to reverse any nested boundaries
204 // because RFC 2046 (5.1.1) says that if a line starts with the outer
205 // boundary string (doesn't matter what the line ends with), that
206 // can be considered a match for the outer boundary; thus the nested
207 // boundary needs to be unique from the outer one
ba86230e 208 //
209 } else if (strpos($boundary,'_trap_')) {
210 $boundary = substr(strrev($boundary),0,strpos(strrev($boundary),'_part_'));
caf6a9a4 211 }
ba86230e 212 $boundary_new = strrev($boundary . '_part_'.$message->entity_id);
caf6a9a4 213 } else {
214 $boundary_new = $boundary;
215 }
1274f430 216 if ($boundary && !$message->rfc822_header) {
78f39e78 217 $s = '--'.$boundary."\r\n";
caf6a9a4 218 $s .= $this->prepareMIME_Header($message, $boundary_new);
78f39e78 219 $length_raw += strlen($s);
220 if ($stream) {
3b53d87f 221 $this->preWriteToStream($s);
78f39e78 222 $this->writeToStream($stream, $s);
223 }
224 }
225 $this->writeBodyPart($message, $stream, $length_raw);
72b004e6 226
78f39e78 227 $last = false;
228 for ($i=0, $entCount=count($message->entities);$i<$entCount;$i++) {
caf6a9a4 229 $msg = $this->writeBody($message->entities[$i], $stream, $length_raw, $boundary_new);
78f39e78 230 if ($i == $entCount-1) $last = true;
231 }
1274f430 232 if ($boundary && $last) {
dcc5c913 233 $s = "--".$boundary_new."--\r\n\r\n";
78f39e78 234 $length_raw += strlen($s);
235 if ($stream) {
3b53d87f 236 $this->preWriteToStream($s);
78f39e78 237 $this->writeToStream($stream, $s);
238 }
239 }
3b53d87f 240 }
241
72b004e6 242 /**
243 * function writeBodyPart - write each individual mimepart
244 *
245 * Recursively called by WriteBody to write each mime part to the SMTP stream
246 *
247 * @param Message $message Message object to transform
248 * @param resource $stream SMTP output stream
e2ccf284 249 * (when FALSE, nothing will be
250 * written to the stream; this can
251 * be used to determine the actual
252 * number of bytes that will be
253 * written to the stream)
72b004e6 254 * @param integer &$length length of the message part
255 * as returned by mail fn
256 *
3a70ee56 257 * @return void
72b004e6 258 */
3b53d87f 259 function writeBodyPart($message, $stream, &$length) {
1274f430 260 if ($message->mime_header) {
78f39e78 261 $type0 = $message->mime_header->type0;
262 } else {
263 $type0 = $message->rfc822_header->content_type->type0;
264 }
265
266 $body_part_trailing = $last = '';
267 switch ($type0)
268 {
269 case 'text':
270 case 'message':
271 if ($message->body_part) {
272 $body_part = $message->body_part;
4cf85ddd 273 // remove NUL characters
274 $body_part = str_replace("\0",'',$body_part);
78f39e78 275 $length += $this->clean_crlf($body_part);
276 if ($stream) {
72b004e6 277 $this->preWriteToStream($body_part);
78f39e78 278 $this->writeToStream($stream, $body_part);
279 }
280 $last = $body_part;
281 } elseif ($message->att_local_name) {
1f270d3c 282 global $username, $attachment_dir;
283 $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
78f39e78 284 $filename = $message->att_local_name;
89f19004 285
286 // inspect attached file for lines longer than allowed by RFC,
287 // in which case we'll be using base64 encoding (so we can split
288 // the lines up without corrupting them) instead of 8bit unencoded...
289 // (see RFC 2822/2.1.1)
290 //
291 // using 990 because someone somewhere is folding lines at
292 // 990 instead of 998 and I'm too lazy to find who it is
293 //
294 $file_has_long_lines = file_has_long_lines($hashed_attachment_dir
295 . '/' . $filename, 990);
296
1f270d3c 297 $file = fopen ($hashed_attachment_dir . '/' . $filename, 'rb');
89f19004 298
299 // long lines were found, need to use base64 encoding
300 //
301 if ($file_has_long_lines) {
302 while ($tmp = fread($file, 570)) {
303 $body_part = chunk_split(base64_encode($tmp));
304 // Up to 4.3.10 chunk_split always appends a newline,
305 // while in 4.3.11 it doesn't if the string to split
306 // is shorter than the chunk length.
307 if( substr($body_part, -1 , 1 ) != "\n" )
308 $body_part .= "\n";
309 $length += $this->clean_crlf($body_part);
310 if ($stream) {
311 $this->writeToStream($stream, $body_part);
312 }
313 }
314 }
315
316 // no excessively long lines - normal 8bit
317 //
318 else {
319 while ($body_part = fgets($file, 4096)) {
320 // remove NUL characters
321 $body_part = str_replace("\0",'',$body_part);
322 $length += $this->clean_crlf($body_part);
323 if ($stream) {
324 $this->preWriteToStream($body_part);
325 $this->writeToStream($stream, $body_part);
326 }
327 $last = $body_part;
78f39e78 328 }
78f39e78 329 }
89f19004 330
78f39e78 331 fclose($file);
332 }
333 break;
334 default:
335 if ($message->body_part) {
336 $body_part = $message->body_part;
257dea3f 337 // remove NUL characters
338 $body_part = str_replace("\0",'',$body_part);
78f39e78 339 $length += $this->clean_crlf($body_part);
340 if ($stream) {
341 $this->writeToStream($stream, $body_part);
342 }
343 } elseif ($message->att_local_name) {
1f270d3c 344 global $username, $attachment_dir;
345 $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
78f39e78 346 $filename = $message->att_local_name;
1f270d3c 347 $file = fopen ($hashed_attachment_dir . '/' . $filename, 'rb');
78f39e78 348 while ($tmp = fread($file, 570)) {
27ff4efb 349 $body_part = chunk_split(base64_encode($tmp));
350 // Up to 4.3.10 chunk_split always appends a newline,
351 // while in 4.3.11 it doesn't if the string to split
352 // is shorter than the chunk length.
353 if( substr($body_part, -1 , 1 ) != "\n" )
354 $body_part .= "\n";
78f39e78 355 $length += $this->clean_crlf($body_part);
356 if ($stream) {
357 $this->writeToStream($stream, $body_part);
358 }
359 }
360 fclose($file);
3b53d87f 361 }
78f39e78 362 break;
363 }
364 $body_part_trailing = '';
365 if ($last && substr($last,-1) != "\n") {
366 $body_part_trailing = "\r\n";
367 }
368 if ($body_part_trailing) {
369 $length += strlen($body_part_trailing);
370 if ($stream) {
371 $this->preWriteToStream($body_part_trailing);
372 $this->writeToStream($stream, $body_part_trailing);
373 }
374 }
3b53d87f 375 }
78f39e78 376
72b004e6 377 /**
378 * function clean_crlf - change linefeeds and newlines to legal characters
379 *
380 * The SMTP format only allows CRLF as line terminators.
381 * This function replaces illegal teminators with the correct terminator.
382 *
383 * @param string &$s string to clean linefeeds on
384 *
3a70ee56 385 * @return void
72b004e6 386 */
69298c28 387 function clean_crlf(&$s) {
3b53d87f 388 $s = str_replace("\r\n", "\n", $s);
389 $s = str_replace("\r", "\n", $s);
390 $s = str_replace("\n", "\r\n", $s);
78f39e78 391 return strlen($s);
3b53d87f 392 }
78f39e78 393
72b004e6 394 /**
395 * function strip_crlf - strip linefeeds and newlines from a string
396 *
397 * The SMTP format only allows CRLF as line terminators.
398 * This function strips all line terminators from the string.
399 *
400 * @param string &$s string to clean linefeeds on
401 *
3a70ee56 402 * @return void
72b004e6 403 */
e4f9307a 404 function strip_crlf(&$s) {
405 $s = str_replace("\r\n ", '', $s);
78f39e78 406 $s = str_replace("\r", '', $s);
407 $s = str_replace("\n", '', $s);
e4f9307a 408 }
3b53d87f 409
72b004e6 410 /**
411 * function preWriteToStream - reserved for extended functionality
412 *
413 * This function is not yet implemented.
414 * Reserved for extended functionality.
415 *
416 * @param string &$s string to operate on
417 *
3a70ee56 418 * @return void
72b004e6 419 */
69298c28 420 function preWriteToStream(&$s) {
3b53d87f 421 }
78f39e78 422
72b004e6 423 /**
424 * function writeToStream - write data to the SMTP stream
425 *
426 * @param resource $stream SMTP output stream
427 * @param string $data string with data to send to the SMTP stream
428 *
3a70ee56 429 * @return void
72b004e6 430 */
3b53d87f 431 function writeToStream($stream, $data) {
78f39e78 432 fputs($stream, $data);
3b53d87f 433 }
78f39e78 434
72b004e6 435 /**
436 * function initStream - reserved for extended functionality
437 *
438 * This function is not yet implemented.
439 * Reserved for extended functionality.
653a7e87 440 * UPDATE: It is implemented in Deliver_SMTP and Deliver_SendMail classes,
441 * but it remains unimplemented in this base class (and thus not
442 * in Deliver_IMAP or other child classes that don't define it)
443 *
444 * NOTE: some parameters are specific to the child class
445 * that is implementing this method
72b004e6 446 *
447 * @param Message $message Message object
653a7e87 448 * @param string $domain
449 * @param integer $length
72b004e6 450 * @param string $host host name or IP to connect to
653a7e87 451 * @param integer $port
72b004e6 452 * @param string $user username to log into the SMTP server with
453 * @param string $pass password to log into the SMTP server with
653a7e87 454 * @param boolean $authpop whether or not to use POP-before-SMTP authorization
455 * @param string $pop_host host name or IP to connect to for POP-before-SMTP authorization
72b004e6 456 *
3a70ee56 457 * @return handle $stream file handle resource to SMTP stream
72b004e6 458 */
653a7e87 459 function initStream($message, $domain, $length=0, $host='', $port='', $user='', $pass='', $authpop=false, $pop_host='') {
78f39e78 460 return $stream;
3b53d87f 461 }
72b004e6 462
463 /**
464 * function getBCC - reserved for extended functionality
465 *
466 * This function is not yet implemented.
467 * Reserved for extended functionality.
468 *
469 */
470 function getBCC() {
78f39e78 471 return false;
59387d1c 472 }
3b53d87f 473
72b004e6 474 /**
475 * function prepareMIME_Header - creates the mime header
476 *
477 * @param Message $message Message object to act on
478 * @param string $boundary mime boundary from fn MimeBoundary
479 *
3a70ee56 480 * @return string $header properly formatted mime header
72b004e6 481 */
3b53d87f 482 function prepareMIME_Header($message, $boundary) {
78f39e78 483 $mime_header = $message->mime_header;
484 $rn="\r\n";
485 $header = array();
1274f430 486
78f39e78 487 $contenttype = 'Content-Type: '. $mime_header->type0 .'/'.
488 $mime_header->type1;
489 if (count($message->entities)) {
fcce1b3c 490 $contenttype .= ';' . 'boundary="'.$boundary.'"';
78f39e78 491 }
492 if (isset($mime_header->parameters['name'])) {
493 $contenttype .= '; name="'.
494 encodeHeader($mime_header->parameters['name']). '"';
495 }
496 if (isset($mime_header->parameters['charset'])) {
497 $charset = $mime_header->parameters['charset'];
498 $contenttype .= '; charset="'.
499 encodeHeader($charset). '"';
500 }
1274f430 501
78f39e78 502 $header[] = $contenttype . $rn;
503 if ($mime_header->description) {
eb72e151 504 $header[] = 'Content-Description: ' . $mime_header->description . $rn;
78f39e78 505 }
506 if ($mime_header->encoding) {
eb72e151 507 $header[] = 'Content-Transfer-Encoding: ' . $mime_header->encoding . $rn;
78f39e78 508 } else {
89f19004 509
510 // inspect attached file for lines longer than allowed by RFC,
511 // in which case we'll be using base64 encoding (so we can split
512 // the lines up without corrupting them) instead of 8bit unencoded...
513 // (see RFC 2822/2.1.1)
514 //
515 if (!empty($message->att_local_name)) { // is this redundant? I have no idea
516 global $username, $attachment_dir;
517 $hashed_attachment_dir = getHashedDir($username, $attachment_dir);
518 $filename = $hashed_attachment_dir . '/' . $message->att_local_name;
519
520 // using 990 because someone somewhere is folding lines at
521 // 990 instead of 998 and I'm too lazy to find who it is
522 //
523 $file_has_long_lines = file_has_long_lines($filename, 990);
524 } else
525 $file_has_long_lines = FALSE;
526
527 if ($mime_header->type0 == 'multipart' || $mime_header->type0 == 'alternative') {
c6dd29ba 528 /* no-op; no encoding needed */
89f19004 529 } else if (($mime_header->type0 == 'text' || $mime_header->type0 == 'message')
530 && !$file_has_long_lines) {
531 $header[] = 'Content-Transfer-Encoding: 8bit' . $rn;
78f39e78 532 } else {
eb72e151 533 $header[] = 'Content-Transfer-Encoding: base64' . $rn;
78f39e78 534 }
535 }
536 if ($mime_header->id) {
eb72e151 537 $header[] = 'Content-ID: ' . $mime_header->id . $rn;
78f39e78 538 }
539 if ($mime_header->disposition) {
540 $disposition = $mime_header->disposition;
541 $contentdisp = 'Content-Disposition: ' . $disposition->name;
542 if ($disposition->getProperty('filename')) {
543 $contentdisp .= '; filename="'.
544 encodeHeader($disposition->getProperty('filename')). '"';
545 }
72b004e6 546 $header[] = $contentdisp . $rn;
78f39e78 547 }
548 if ($mime_header->md5) {
eb72e151 549 $header[] = 'Content-MD5: ' . $mime_header->md5 . $rn;
78f39e78 550 }
551 if ($mime_header->language) {
eb72e151 552 $header[] = 'Content-Language: ' . $mime_header->language . $rn;
78f39e78 553 }
4960ec8e 554
78f39e78 555 $cnt = count($header);
556 $hdr_s = '';
557 for ($i = 0 ; $i < $cnt ; $i++) {
b1fbb25f 558 $hdr_s .= $this->foldLine($header[$i], 78);
78f39e78 559 }
560 $header = $hdr_s;
561 $header .= $rn; /* One blank line to separate mimeheader and body-entity */
562 return $header;
563 }
4960ec8e 564
72b004e6 565 /**
566 * function prepareRFC822_Header - prepares the RFC822 header string from Rfc822Header object(s)
567 *
568 * This function takes the Rfc822Header object(s) and formats them
569 * into the RFC822Header string to send to the SMTP server as part
570 * of the SMTP message.
571 *
572 * @param Rfc822Header $rfc822_header
573 * @param Rfc822Header $reply_rfc822_header
574 * @param integer &$raw_length length of the message
575 *
3a70ee56 576 * @return string $header
72b004e6 577 */
10adeb76 578 function prepareRFC822_Header(&$rfc822_header, $reply_rfc822_header, &$raw_length) {
b37e457f 579 global $domain, $username, $encode_header_key,
e930c9fe 580 $edit_identity, $hide_auth_header;
60a46e65 581
49c7f411 582 /* if server var SERVER_NAME not available, or contains
583 ":" (e.g. IPv6) which is illegal in a Message-ID, use $domain */
584 if(!sqGetGlobalVar('SERVER_NAME', $SERVER_NAME, SQ_SERVER) ||
585 strpos($SERVER_NAME,':') !== FALSE) {
60a46e65 586 $SERVER_NAME = $domain;
78f39e78 587 }
60a46e65 588
78f39e78 589 sqGetGlobalVar('REMOTE_ADDR', $REMOTE_ADDR, SQ_SERVER);
590 sqGetGlobalVar('REMOTE_PORT', $REMOTE_PORT, SQ_SERVER);
591 sqGetGlobalVar('REMOTE_HOST', $REMOTE_HOST, SQ_SERVER);
592 sqGetGlobalVar('HTTP_VIA', $HTTP_VIA, SQ_SERVER);
593 sqGetGlobalVar('HTTP_X_FORWARDED_FOR', $HTTP_X_FORWARDED_FOR, SQ_SERVER);
60a46e65 594
78f39e78 595 $rn = "\r\n";
223872cb 596
78f39e78 597 /* This creates an RFC 822 date */
867fed37 598 $date = date('D, j M Y H:i:s ', time()) . $this->timezone();
49c7f411 599
78f39e78 600 /* Create a message-id */
10adeb76 601 $message_id = 'MESSAGE ID GENERATION ERROR! PLEASE CONTACT SQUIRRELMAIL DEVELOPERS';
602 if (empty($rfc822_header->message_id)) {
dda811a1 603 $message_id = '<'
604 . md5(GenerateRandomString(16, '', 7) . uniqid(mt_rand(),true))
605 . '.squirrel@' . $SERVER_NAME .'>';
10adeb76 606 }
b67d61ee 607
78f39e78 608 /* Make an RFC822 Received: line */
609 if (isset($REMOTE_HOST)) {
610 $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])";
611 } else {
612 $received_from = $REMOTE_ADDR;
613 }
614 if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) {
615 if (!isset($HTTP_X_FORWARDED_FOR) || $HTTP_X_FORWARDED_FOR == '') {
616 $HTTP_X_FORWARDED_FOR = 'unknown';
617 }
618 $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)";
619 }
620 $header = array();
432db2fc 621
622 /**
623 * SquirrelMail header
624 *
625 * This Received: header provides information that allows to track
626 * user and machine that was used to send email. Don't remove it
627 * unless you understand all possible forging issues or your
628 * webmail installation does not prevent changes in user's email address.
629 * See SquirrelMail bug tracker #847107 for more details about it.
bb08da84 630 *
904849cc 631 * Add hide_squirrelmail_header as a candidate for config_local.php
632 * (must be defined as a constant: define('hide_squirrelmail_header', 1);
bb08da84 633 * to allow completely hiding SquirrelMail participation in message
539a323f 634 * processing; This is dangerous, especially if users can modify their
e930c9fe 635 * account information, as it makes mapping a sent message back to the
636 * original sender almost impossible.
432db2fc 637 */
e930c9fe 638 $show_sm_header = ( defined('hide_squirrelmail_header') ? ! hide_squirrelmail_header : 1 );
bb08da84 639
10adeb76 640 // FIXME: The following headers may generate slightly differently between the message sent to the destination and that stored in the Sent folder because this code will be called before both actions. This is not necessarily a big problem, but other headers such as Message-ID and Date are preserved between both actions
bb08da84 641 if ( $show_sm_header ) {
642 if (isset($encode_header_key) &&
432db2fc 643 trim($encode_header_key)!='') {
644 // use encoded headers, if encryption key is set and not empty
b81efcb4 645 $header[] = 'X-Squirrel-UserHash: '.OneTimePadEncrypt($username,base64_encode($encode_header_key)).$rn;
646 $header[] = 'X-Squirrel-FromHash: '.OneTimePadEncrypt($this->ip2hex($REMOTE_ADDR),base64_encode($encode_header_key)).$rn;
432db2fc 647 if (isset($HTTP_X_FORWARDED_FOR))
b81efcb4 648 $header[] = 'X-Squirrel-ProxyHash:'.OneTimePadEncrypt($this->ip2hex($HTTP_X_FORWARDED_FOR),base64_encode($encode_header_key)).$rn;
bb08da84 649 } else {
432db2fc 650 // use default received headers
651 $header[] = "Received: from $received_from" . $rn;
2405c716 652 if (!isset($hide_auth_header) || !$hide_auth_header)
432db2fc 653 $header[] = " (SquirrelMail authenticated user $username)" . $rn;
654 $header[] = " by $SERVER_NAME with HTTP;" . $rn;
655 $header[] = " $date" . $rn;
bb08da84 656 }
35aaf666 657 }
432db2fc 658
59387d1c 659 /* Insert the rest of the header fields */
10adeb76 660
661 if (!empty($rfc822_header->message_id)) {
662 $header[] = 'Message-ID: '. $rfc822_header->message_id . $rn;
663 } else {
664 $header[] = 'Message-ID: '. $message_id . $rn;
665 $rfc822_header->message_id = $message_id;
666 }
667
ea87de81 668 if (is_object($reply_rfc822_header) &&
b4316b34 669 isset($reply_rfc822_header->message_id) &&
670 $reply_rfc822_header->message_id) {
78f39e78 671 $rep_message_id = $reply_rfc822_header->message_id;
78f39e78 672 $header[] = 'In-Reply-To: '.$rep_message_id . $rn;
10adeb76 673 $rfc822_header->in_reply_to = $rep_message_id;
78f39e78 674 $references = $this->calculate_references($reply_rfc822_header);
675 $header[] = 'References: '.$references . $rn;
10adeb76 676 $rfc822_header->references = $references;
78f39e78 677 }
10adeb76 678
679 if (!empty($rfc822_header->date) && $rfc822_header->date != -1) {
680 $header[] = 'Date: '. $rfc822_header->date . $rn;
681 } else {
682 $header[] = "Date: $date" . $rn;
683 $rfc822_header->date = $date;
684 }
685
59387d1c 686 $header[] = 'Subject: '.encodeHeader($rfc822_header->subject) . $rn;
ac47827c 687 $header[] = 'From: '. $rfc822_header->getAddr_s('from',",$rn ",true) . $rn;
688
ea87de81 689 // folding address list [From|To|Cc|Bcc] happens by using ",$rn<space>"
690 // as delimiter
ac47827c 691 // Do not use foldLine for that.
692
693 // RFC2822 if from contains more then 1 address
59387d1c 694 if (count($rfc822_header->from) > 1) {
215de78c 695 $header[] = 'Sender: '. $rfc822_header->getAddr_s('sender',',',true) . $rn;
78f39e78 696 }
697 if (count($rfc822_header->to)) {
ac47827c 698 $header[] = 'To: '. $rfc822_header->getAddr_s('to',",$rn ",true) . $rn;
78f39e78 699 }
700 if (count($rfc822_header->cc)) {
ac47827c 701 $header[] = 'Cc: '. $rfc822_header->getAddr_s('cc',",$rn ",true) . $rn;
78f39e78 702 }
703 if (count($rfc822_header->reply_to)) {
215de78c 704 $header[] = 'Reply-To: '. $rfc822_header->getAddr_s('reply_to',',',true) . $rn;
78f39e78 705 }
706 /* Sendmail should return true. Default = false */
707 $bcc = $this->getBcc();
708 if (count($rfc822_header->bcc)) {
ac47827c 709 $s = 'Bcc: '. $rfc822_header->getAddr_s('bcc',",$rn ",true) . $rn;
78f39e78 710 if (!$bcc) {
78f39e78 711 $raw_length += strlen($s);
712 } else {
713 $header[] = $s;
714 }
715 }
72b004e6 716 /* Identify SquirrelMail */
b37e457f 717 $header[] = 'User-Agent: SquirrelMail/' . SM_VERSION . $rn;
78f39e78 718 /* Do the MIME-stuff */
719 $header[] = 'MIME-Version: 1.0' . $rn;
720 $contenttype = 'Content-Type: '. $rfc822_header->content_type->type0 .'/'.
59387d1c 721 $rfc822_header->content_type->type1;
78f39e78 722 if (count($rfc822_header->content_type->properties)) {
723 foreach ($rfc822_header->content_type->properties as $k => $v) {
724 if ($k && $v) {
72b004e6 725 $contenttype .= ';' .$k.'='.$v;
78f39e78 726 }
727 }
728 }
59387d1c 729 $header[] = $contenttype . $rn;
78f39e78 730 if ($encoding = $rfc822_header->encoding) {
23301b33 731 $header[] = 'Content-Transfer-Encoding: ' . $encoding . $rn;
72b004e6 732 }
539a323f 733 if (isset($rfc822_header->dnt) && $rfc822_header->dnt) {
72b004e6 734 $dnt = $rfc822_header->getAddr_s('dnt');
78f39e78 735 /* Pegasus Mail */
736 $header[] = 'X-Confirm-Reading-To: '.$dnt. $rn;
737 /* RFC 2298 */
738 $header[] = 'Disposition-Notification-To: '.$dnt. $rn;
739 }
740 if ($rfc822_header->priority) {
d1db3699 741 switch($rfc822_header->priority)
78f39e78 742 {
d1db3699 743 case 1:
91e0dccc 744 $header[] = 'X-Priority: 1 (Highest)'.$rn;
745 $header[] = 'Importance: High'. $rn; break;
d1db3699 746 case 5:
91e0dccc 747 $header[] = 'X-Priority: 5 (Lowest)'.$rn;
748 $header[] = 'Importance: Low'. $rn; break;
78f39e78 749 default: break;
750 }
751 }
72b004e6 752 /* Insert headers from the $more_headers array */
78f39e78 753 if(count($rfc822_header->more_headers)) {
754 reset($rfc822_header->more_headers);
755 foreach ($rfc822_header->more_headers as $k => $v) {
756 $header[] = $k.': '.$v .$rn;
757 }
758 }
759 $cnt = count($header);
760 $hdr_s = '';
5d2a7b15 761
78f39e78 762 for ($i = 0 ; $i < $cnt ; $i++) {
5d2a7b15 763 $sKey = substr($header[$i],0,strpos($header[$i],':'));
764 switch ($sKey)
765 {
766 case 'Message-ID':
767 case 'In-Reply_To':
768 $hdr_s .= $header[$i];
769 break;
770 case 'References':
771 $sRefs = substr($header[$i],12);
772 $aRefs = explode(' ',$sRefs);
773 $sLine = 'References:';
774 foreach ($aRefs as $sReference) {
cc201b46 775 if ( trim($sReference) == '' ) {
776 /* Don't add spaces. */
777 } elseif (strlen($sLine)+strlen($sReference) >76) {
5d2a7b15 778 $hdr_s .= $sLine;
779 $sLine = $rn . ' ' . $sReference;
780 } else {
781 $sLine .= ' '. $sReference;
782 }
783 }
784 $hdr_s .= $sLine;
785 break;
ac47827c 786 case 'To':
787 case 'Cc':
788 case 'Bcc':
789 case 'From':
790 $hdr_s .= $header[$i];
791 break;
b1fbb25f 792 default: $hdr_s .= $this->foldLine($header[$i], 78); break;
5d2a7b15 793 }
78f39e78 794 }
78f39e78 795 $header = $hdr_s;
796 $header .= $rn; /* One blank line to separate header and body */
797 $raw_length += strlen($header);
798 return $header;
4960ec8e 799 }
800
72b004e6 801 /**
9bcf508d 802 * Fold header lines per RFC 2822/2.2.3 and RFC 822/3.1.1
803 *
804 * Herein "soft" folding/wrapping (with whitespace tokens) is
805 * what we refer to as the preferred method of wrapping - that
806 * which we'd like to do within the $soft_wrap limit, but if
807 * not possible, we will try to do as soon as possible after
808 * $soft_wrap up to the $hard_wrap limit. Encoded words don't
809 * need to be detected in this phase, since they cannot contain
810 * spaces.
811 *
812 * "Hard" folding/wrapping (with "hard" tokens) is what we refer
813 * to as less ideal wrapping that will be done to keep within
814 * the $hard_wrap limit. This adds other syntactical breaking
815 * elements such as commas and encoded words.
816 *
817 * @param string $header The header content being folded
818 * @param integer $soft_wrap The desirable maximum line length
819 * (OPTIONAL; default is 78, per RFC)
820 * @param string $indent Wrapped lines will already have
821 * whitespace following the CRLF wrap,
822 * but you can add more indentation (or
823 * whatever) with this. The use of this
824 * parameter is DISCOURAGED, since it
825 * can corrupt the redisplay (unfolding)
826 * of headers whose content is space-
827 * sensitive, like subjects, etc.
828 * (OPTIONAL; default is an empty string)
829 * @param string $hard_wrap The absolute maximum line length
830 * (OPTIONAL; default is 998, per RFC)
831 *
832 * @return string The folded header content, with a trailing CRLF.
833 *
834 */
835 function foldLine($header, $soft_wrap=78, $indent='', $hard_wrap=998) {
836
837 // the "hard" token list can be altered if desired,
838 // for example, by adding ":"
839 // (in the future, we can take optional arguments
840 // for overriding or adding elements to the "hard"
841 // token list if we want to get fancy)
842 //
843 // the order of these is significant - preferred
844 // fold points should be listed first
845 //
846 // it is advised that the "=" always come first
847 // since it also finds encoded words, thus if it
848 // comes after some other token that happens to
849 // fall within the encoded word, the encoded word
850 // could be inadvertently broken in half, which
851 // is not allowable per RFC
852 //
853 $hard_break_tokens = array(
854 '=', // includes encoded word detection
855 ',',
856 ';',
857 );
858
859 // the order of these is significant too
860 //
861 $whitespace = array(
862 ' ',
863 "\t",
864 );
865
866 $CRLF = "\r\n";
867
868 $folded_header = '';
869
870 // if using an indent string, reduce wrap limits by its size
871 //
872 if (!empty($indent)) {
873 $soft_wrap -= strlen($indent);
874 $hard_wrap -= strlen($indent);
875 }
876
877 while (strlen($header) > $soft_wrap) {
878
879 $soft_wrapped_line = substr($header, 0, $soft_wrap);
880
881 // look for a token as close to the end of the soft wrap limit as possible
882 //
883 foreach ($whitespace as $token) {
884
885 // note that this if statement also fails when $pos === 0,
886 // which is intended, since blank lines are not allowed
887 //
888 if ($pos = strrpos($soft_wrapped_line, $token))
889 {
890 $new_fold = substr($header, 0, $pos);
891
892 // make sure proposed fold doesn't create a blank line
893 //
894 if (!trim($new_fold)) continue;
895
896 // with whitespace breaks, we fold BEFORE the token
897 //
898 $folded_header .= $new_fold . $CRLF . $indent;
899 $header = substr($header, $pos);
900
901 // ready for next while() iteration
902 //
903 continue 2;
904
905 }
906
907 }
908
909 // we were unable to find a wrapping point within the soft
910 // wrap limit, so now we'll try to find the first possible
911 // soft wrap point within the hard wrap limit
912 //
913 $hard_wrapped_line = substr($header, 0, $hard_wrap);
914
915 // look for a *SOFT* token as close to the
916 // beginning of the hard wrap limit as possible
917 //
918 foreach ($whitespace as $token) {
919
920 // use while loop instead of if block because it
921 // is possible we don't want the first one we find
922 //
923 $pos = $soft_wrap - 1; // -1 is corrected by +1 on next line
924 while ($pos = strpos($hard_wrapped_line, $token, $pos + 1))
925 {
926
927 $new_fold = substr($header, 0, $pos);
928
929 // make sure proposed fold doesn't create a blank line
930 //
931 if (!trim($new_fold)) continue;
932
933 // with whitespace breaks, we fold BEFORE the token
934 //
935 $folded_header .= $new_fold . $CRLF . $indent;
936 $header = substr($header, $pos);
937
938 // ready for next outter while() iteration
939 //
940 continue 3;
941
942 }
943
944 }
945
946 // we were still unable to find a soft wrapping point within
947 // both the soft and hard wrap limits, so if the length of
948 // what is left is no more than the hard wrap limit, we'll
949 // simply take the whole thing
950 //
951 if (strlen($header) <= strlen($hard_wrapped_line))
952 break;
953
954 // otherwise, we can't quit yet - look for a "hard" token
955 // as close to the end of the hard wrap limit as possible
956 //
957 foreach ($hard_break_tokens as $token) {
958
959 // note that this if statement also fails when $pos === 0,
960 // which is intended, since blank lines are not allowed
961 //
962 if ($pos = strrpos($hard_wrapped_line, $token))
963 {
964
965 // if we found a "=" token, we must determine whether,
966 // if it is part of an encoded word, it is the beginning
967 // or middle of one, where we need to readjust $pos a bit
968 //
969 if ($token == '=') {
970
971 // if we found the beginning of an encoded word,
972 // we want to break BEFORE the token
973 //
b1fbb25f 974 if (preg_match('/^(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)/Ui',
9bcf508d 975 substr($header, $pos))) {
976 $pos--;
72b004e6 977 }
9bcf508d 978
979 // check if we found this token in the *middle*
980 // of an encoded word, in which case we have to
981 // ignore it, pushing back to the token that
982 // starts the encoded word instead
983 //
984 // of course, this is only possible if there is
985 // more content after the next hard wrap
986 //
987 // then look for the end of an encoded word in
988 // the next part (past the next hard wrap)
989 //
990 // then see if it is in fact part of a legitimate
991 // encoded word
992 //
993 else if (strlen($header) > $hard_wrap
994 && ($end_pos = strpos(substr($header, $hard_wrap), '?=')) !== FALSE
b1fbb25f 995 && preg_match('/(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)$/Ui',
9bcf508d 996 substr($header, 0, $hard_wrap + $end_pos + 2),
997 $matches)) {
998
999 $pos = $hard_wrap + $end_pos + 2 - strlen($matches[1]) - 1;
1000
72b004e6 1001 }
72b004e6 1002
fb1d6cb6 1003 }
9bcf508d 1004
1005 // $pos could have been changed; make sure it's
1006 // not at the beginning of the line, as blank
1007 // lines are not allowed
1008 //
1009 if ($pos === 0) continue;
1010
1011 // we are dealing with a simple token break...
1012 //
1013 // for non-whitespace breaks, we fold AFTER the token
1014 // and add a space after the fold if not immediately
1015 // followed by a whitespace character in the next part
1016 //
1017 $folded_header .= substr($header, 0, $pos + 1) . $CRLF;
1018
1019 // don't go beyond end of $header, though
1020 //
1021 if (strlen($header) > $pos + 1) {
1022 $header = substr($header, $pos + 1);
1023 if (!in_array($header{0}, $whitespace))
1024 $header = ' ' . $indent . $header;
1025 } else {
1026 $header = '';
fb1d6cb6 1027 }
9bcf508d 1028
1029 // ready for next while() iteration
1030 //
1031 continue 2;
1032
fb1d6cb6 1033 }
9bcf508d 1034
fb1d6cb6 1035 }
9bcf508d 1036
1037 // finally, we just couldn't find anything to fold on, so we
1038 // have to just cut it off at the hard limit
1039 //
1040 $folded_header .= $hard_wrapped_line . $CRLF;
1041
1042 // is there more?
1043 //
1044 if (strlen($header) > strlen($hard_wrapped_line)) {
1045 $header = substr($header, strlen($hard_wrapped_line));
1046 if (!in_array($header{0}, $whitespace))
1047 $header = ' ' . $indent . $header;
1048 } else {
1049 $header = '';
fb1d6cb6 1050 }
9bcf508d 1051
fb1d6cb6 1052 }
9bcf508d 1053
1054
1055 // add any left-overs
1056 //
1057 $folded_header .= $header;
1058
1059
1060 // make sure it ends with a CRLF
1061 //
1062 if (substr($folded_header, -2) != $CRLF) $folded_header .= $CRLF;
1063
1064
1065 return $folded_header;
fb1d6cb6 1066 }
3b53d87f 1067
72b004e6 1068 /**
1069 * function mimeBoundary - calculates the mime boundary to use
1070 *
1071 * This function will generate a random mime boundary base part
1072 * for the message if the boundary has not already been set.
1073 *
3a70ee56 1074 * @return string $mimeBoundaryString random mime boundary string
72b004e6 1075 */
59387d1c 1076 function mimeBoundary () {
78f39e78 1077 static $mimeBoundaryString;
3b53d87f 1078
78f39e78 1079 if ( !isset( $mimeBoundaryString ) ||
1080 $mimeBoundaryString == '') {
1081 $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' .
1082 mt_rand( 10000, 99999 );
1083 }
1084 return $mimeBoundaryString;
3b53d87f 1085 }
1086
72b004e6 1087 /**
1088 * function timezone - Time offset for correct timezone
1089 *
3a70ee56 1090 * @return string $result with timezone and offset
72b004e6 1091 */
59387d1c 1092 function timezone () {
0bbf8622 1093 global $invert_time, $show_timezone_name;
78f39e78 1094
1095 $diff_second = date('Z');
1096 if ($invert_time) {
1097 $diff_second = - $diff_second;
1098 }
1099 if ($diff_second > 0) {
1100 $sign = '+';
1101 } else {
1102 $sign = '-';
1103 }
1104 $diff_second = abs($diff_second);
1105 $diff_hour = floor ($diff_second / 3600);
1106 $diff_minute = floor (($diff_second-3600*$diff_hour) / 60);
0bbf8622 1107
1108 // If an administrator wants to add the timezone name to the
1109 // end of the date header, they can set $show_timezone_name
1110 // to boolean TRUE in config/config_local.php, but that is
1111 // NOT RFC-822 compliant (see section 5.1). Moreover, some
1112 // Windows users reported that strftime('%Z') was returning
1113 // the full zone name (not the abbreviation) which in some
1114 // cases included 8-bit characters (not allowed as is in headers).
1115 // The PHP manual actually does NOT promise what %Z will return
1116 // for strftime!: "The time zone offset/abbreviation option NOT
1117 // given by %z (depends on operating system)"
1118 //
1119 if ($show_timezone_name) {
1120 $zonename = '('.strftime('%Z').')';
1121 $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, $zonename);
1122 } else {
1123 $result = sprintf ("%s%02d%02d", $sign, $diff_hour, $diff_minute);
1124 }
78f39e78 1125 return ($result);
59387d1c 1126 }
3b53d87f 1127
72b004e6 1128 /**
f2ac3325 1129 * function calculate_references - calculate correct References string
1130 * Adds the current message ID, and makes sure it doesn't grow forever,
1131 * to that extent it drops message-ID's in a smart way until the string
1132 * length is under the recommended value of 1000 ("References: <986>\r\n").
1133 * It always keeps the first and the last three ID's.
72b004e6 1134 *
1135 * @param Rfc822Header $hdr message header to calculate from
1136 *
f2ac3325 1137 * @return string $refer concatenated and trimmed References string
72b004e6 1138 */
1274f430 1139 function calculate_references($hdr) {
f2ac3325 1140 $aReferences = preg_split('/\s+/', $hdr->references);
78f39e78 1141 $message_id = $hdr->message_id;
1142 $in_reply_to = $hdr->in_reply_to;
539a323f 1143
f2ac3325 1144 // if References already exists, add the current message ID at the end.
1145 // no References exists; if we know a IRT, add that aswell
1146 if (count($aReferences) == 0 && $in_reply_to) {
1147 $aReferences[] = $in_reply_to;
1148 }
1149 $aReferences[] = $message_id;
1150
1151 // sanitize the array: trim whitespace, remove dupes
86e6a9eb 1152 array_walk($aReferences, 'sq_trim_value');
f2ac3325 1153 $aReferences = array_unique($aReferences);
1154
1155 while ( count($aReferences) > 4 && strlen(implode(' ', $aReferences)) >= 986 ) {
1156 $aReferences = array_merge(array_slice($aReferences,0,1),array_slice($aReferences,2));
78f39e78 1157 }
f2ac3325 1158 return implode(' ', $aReferences);
1159 }
1160
1161 /**
432db2fc 1162 * Converts ip address to hexadecimal string
1163 *
1164 * Function is used to convert ipv4 and ipv6 addresses to hex strings.
1165 * It removes all delimiter symbols from ip addresses, converts decimal
1166 * ipv4 numbers to hex and pads strings in order to present full length
ea87de81 1167 * address. ipv4 addresses are represented as 8 byte strings, ipv6 addresses
432db2fc 1168 * are represented as 32 byte string.
1169 *
1170 * If function fails to detect address format, it returns unprocessed string.
1171 * @param string $string ip address string
1172 * @return string processed ip address string
94511d23 1173 * @since 1.5.1 and 1.4.5
432db2fc 1174 */
1175 function ip2hex($string) {
1176 if (preg_match("/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/",$string,$match)) {
1177 // ipv4 address
1178 $ret = str_pad(dechex($match[1]),2,'0',STR_PAD_LEFT)
1179 . str_pad(dechex($match[2]),2,'0',STR_PAD_LEFT)
1180 . str_pad(dechex($match[3]),2,'0',STR_PAD_LEFT)
1181 . str_pad(dechex($match[4]),2,'0',STR_PAD_LEFT);
1182 } elseif (preg_match("/^([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)$/i",$string,$match)) {
1183 // full ipv6 address
1184 $ret = str_pad($match[1],4,'0',STR_PAD_LEFT)
1185 . str_pad($match[2],4,'0',STR_PAD_LEFT)
1186 . str_pad($match[3],4,'0',STR_PAD_LEFT)
1187 . str_pad($match[4],4,'0',STR_PAD_LEFT)
1188 . str_pad($match[5],4,'0',STR_PAD_LEFT)
1189 . str_pad($match[6],4,'0',STR_PAD_LEFT)
1190 . str_pad($match[7],4,'0',STR_PAD_LEFT)
1191 . str_pad($match[8],4,'0',STR_PAD_LEFT);
1192 } elseif (preg_match("/^\:\:([0-9a-h\:]+)$/i",$string,$match)) {
1193 // short ipv6 with all starting symbols nulled
1194 $aAddr=explode(':',$match[1]);
1195 $ret='';
1196 foreach ($aAddr as $addr) {
1197 $ret.=str_pad($addr,4,'0',STR_PAD_LEFT);
1198 }
1199 $ret=str_pad($ret,32,'0',STR_PAD_LEFT);
1200 } elseif (preg_match("/^([0-9a-h\:]+)::([0-9a-h\:]+)$/i",$string,$match)) {
1201 // short ipv6 with middle part nulled
1202 $aStart=explode(':',$match[1]);
1203 $sStart='';
1204 foreach($aStart as $addr) {
1205 $sStart.=str_pad($addr,4,'0',STR_PAD_LEFT);
1206 }
1207 $aEnd = explode(':',$match[2]);
1208 $sEnd='';
1209 foreach($aEnd as $addr) {
1210 $sEnd.=str_pad($addr,4,'0',STR_PAD_LEFT);
1211 }
1212 $ret = $sStart
1213 . str_pad('',(32 - strlen($sStart . $sEnd)),'0',STR_PAD_LEFT)
1214 . $sEnd;
1215 } else {
1216 // unknown addressing
1217 $ret = $string;
1218 }
1219 return $ret;
1220 }
59387d1c 1221}