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-<?php
-/**
- * StatusNet, the distributed open-source microblogging tool
- *
- * utility functions for Jabber/GTalk/XMPP messages
- *
- * PHP version 5
- *
- * LICENCE: This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 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
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- * @category Network
- * @package StatusNet
- * @author Evan Prodromou <evan@status.net>
- * @copyright 2008 StatusNet, Inc.
- * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
- * @link http://status.net/
- */
-
-if (!defined('STATUSNET') && !defined('LACONICA')) {
- exit(1);
-}
-
-require_once 'XMPPHP/XMPP.php';
-
-/**
- * Splits a Jabber ID (JID) into node, domain, and resource portions.
- *
- * Based on validation routine submitted by:
- * @copyright 2009 Patrick Georgi <patrick@georgi-clan.de>
- * @license Licensed under ISC-L, which is compatible with everything else that keeps the copyright notice intact.
- *
- * @param string $jid string to check
- *
- * @return array with "node", "domain", and "resource" indices
- * @throws Exception if input is not valid
- */
-
-function jabber_split_jid($jid)
-{
- $chars = '';
- /* the following definitions come from stringprep, Appendix C,
- which is used in its entirety by nodeprop, Chapter 5, "Prohibited Output" */
- /* C1.1 ASCII space characters */
- $chars .= "\x{20}";
- /* C1.2 Non-ASCII space characters */
- $chars .= "\x{a0}\x{1680}\x{2000}-\x{200b}\x{202f}\x{205f}\x{3000a}";
- /* C2.1 ASCII control characters */
- $chars .= "\x{00}-\x{1f}\x{7f}";
- /* C2.2 Non-ASCII control characters */
- $chars .= "\x{80}-\x{9f}\x{6dd}\x{70f}\x{180e}\x{200c}\x{200d}\x{2028}\x{2029}\x{2060}-\x{2063}\x{206a}-\x{206f}\x{feff}\x{fff9}-\x{fffc}\x{1d173}-\x{1d17a}";
- /* C3 - Private Use */
- $chars .= "\x{e000}-\x{f8ff}\x{f0000}-\x{ffffd}\x{100000}-\x{10fffd}";
- /* C4 - Non-character code points */
- $chars .= "\x{fdd0}-\x{fdef}\x{fffe}\x{ffff}\x{1fffe}\x{1ffff}\x{2fffe}\x{2ffff}\x{3fffe}\x{3ffff}\x{4fffe}\x{4ffff}\x{5fffe}\x{5ffff}\x{6fffe}\x{6ffff}\x{7fffe}\x{7ffff}\x{8fffe}\x{8ffff}\x{9fffe}\x{9ffff}\x{afffe}\x{affff}\x{bfffe}\x{bffff}\x{cfffe}\x{cffff}\x{dfffe}\x{dffff}\x{efffe}\x{effff}\x{ffffe}\x{fffff}\x{10fffe}\x{10ffff}";
- /* C5 - Surrogate codes */
- $chars .= "\x{d800}-\x{dfff}";
- /* C6 - Inappropriate for plain text */
- $chars .= "\x{fff9}-\x{fffd}";
- /* C7 - Inappropriate for canonical representation */
- $chars .= "\x{2ff0}-\x{2ffb}";
- /* C8 - Change display properties or are deprecated */
- $chars .= "\x{340}\x{341}\x{200e}\x{200f}\x{202a}-\x{202e}\x{206a}-\x{206f}";
- /* C9 - Tagging characters */
- $chars .= "\x{e0001}\x{e0020}-\x{e007f}";
-
- /* Nodeprep forbids some more characters */
- $nodeprepchars = $chars;
- $nodeprepchars .= "\x{22}\x{26}\x{27}\x{2f}\x{3a}\x{3c}\x{3e}\x{40}";
-
- $parts = explode("/", $jid, 2);
- if (count($parts) > 1) {
- $resource = $parts[1];
- if ($resource == '') {
- // Warning: empty resource isn't legit.
- // But if we're normalizing, we may as well take it...
- }
- } else {
- $resource = null;
- }
-
- $node = explode("@", $parts[0]);
- if ((count($node) > 2) || (count($node) == 0)) {
- throw new Exception("Invalid JID: too many @s");
- } else if (count($node) == 1) {
- $domain = $node[0];
- $node = null;
- } else {
- $domain = $node[1];
- $node = $node[0];
- if ($node == '') {
- throw new Exception("Invalid JID: @ but no node");
- }
- }
-
- // Length limits per http://xmpp.org/rfcs/rfc3920.html#addressing
- if ($node !== null) {
- if (strlen($node) > 1023) {
- throw new Exception("Invalid JID: node too long.");
- }
- if (preg_match("/[".$nodeprepchars."]/u", $node)) {
- throw new Exception("Invalid JID node '$node'");
- }
- }
-
- if (strlen($domain) > 1023) {
- throw new Exception("Invalid JID: domain too long.");
- }
- if (!common_valid_domain($domain)) {
- throw new Exception("Invalid JID domain name '$domain'");
- }
-
- if ($resource !== null) {
- if (strlen($resource) > 1023) {
- throw new Exception("Invalid JID: resource too long.");
- }
- if (preg_match("/[".$chars."]/u", $resource)) {
- throw new Exception("Invalid JID resource '$resource'");
- }
- }
-
- return array('node' => is_null($node) ? null : mb_strtolower($node),
- 'domain' => is_null($domain) ? null : mb_strtolower($domain),
- 'resource' => $resource);
-}
-
-/**
- * Checks whether a string is a syntactically valid Jabber ID (JID),
- * either with or without a resource.
- *
- * Note that a bare domain can be a valid JID.
- *
- * @param string $jid string to check
- * @param bool $check_domain whether we should validate that domain...
- *
- * @return boolean whether the string is a valid JID
- */
-function jabber_valid_full_jid($jid, $check_domain=false)
-{
- try {
- $parts = jabber_split_jid($jid);
- if ($check_domain) {
- if (!jabber_check_domain($parts['domain'])) {
- return false;
- }
- }
- return $parts['resource'] !== ''; // missing or present; empty ain't kosher
- } catch (Exception $e) {
- return false;
- }
-}
-
-/**
- * Checks whether a string is a syntactically valid base Jabber ID (JID).
- * A base JID won't include a resource specifier on the end; since we
- * take it off when reading input we can't really use them reliably
- * to direct outgoing messages yet (sorry guys!)
- *
- * Note that a bare domain can be a valid JID.
- *
- * @param string $jid string to check
- * @param bool $check_domain whether we should validate that domain...
- *
- * @return boolean whether the string is a valid JID
- */
-function jabber_valid_base_jid($jid, $check_domain=false)
-{
- try {
- $parts = jabber_split_jid($jid);
- if ($check_domain) {
- if (!jabber_check_domain($parts['domain'])) {
- return false;
- }
- }
- return ($parts['resource'] === null); // missing; empty ain't kosher
- } catch (Exception $e) {
- return false;
- }
-}
-
-/**
- * Normalizes a Jabber ID for comparison, dropping the resource component if any.
- *
- * @param string $jid JID to check
- * @param bool $check_domain if true, reject if the domain isn't findable
- *
- * @return string an equivalent JID in normalized (lowercase) form
- */
-
-function jabber_normalize_jid($jid)
-{
- try {
- $parts = jabber_split_jid($jid);
- if ($parts['node'] !== null) {
- return $parts['node'] . '@' . $parts['domain'];
- } else {
- return $parts['domain'];
- }
- } catch (Exception $e) {
- return null;
- }
-}
-
-/**
- * Check if this domain's got some legit DNS record
- */
-function jabber_check_domain($domain)
-{
- if (checkdnsrr("_xmpp-server._tcp." . $domain, "SRV")) {
- return true;
- }
- if (checkdnsrr($domain, "ANY")) {
- return true;
- }
- return false;
-}
-
-/**
- * the JID of the Jabber daemon for this StatusNet instance
- *
- * @return string JID of the Jabber daemon
- */
-
-function jabber_daemon_address()
-{
- return common_config('xmpp', 'user') . '@' . common_config('xmpp', 'server');
-}
-
-class Sharing_XMPP extends XMPPHP_XMPP
-{
- function getSocket()
- {
- return $this->socket;
- }
-}
-
-/**
- * Build an XMPP proxy connection that'll save outgoing messages
- * to the 'xmppout' queue to be picked up by xmppdaemon later.
- *
- * If queueing is disabled, we'll grab a live connection.
- *
- * @return XMPPHP
- */
-function jabber_proxy()
-{
- if (common_config('queue', 'enabled')) {
- $proxy = new Queued_XMPP(common_config('xmpp', 'host') ?
- common_config('xmpp', 'host') :
- common_config('xmpp', 'server'),
- common_config('xmpp', 'port'),
- common_config('xmpp', 'user'),
- common_config('xmpp', 'password'),
- common_config('xmpp', 'resource') . 'daemon',
- common_config('xmpp', 'server'),
- common_config('xmpp', 'debug') ?
- true : false,
- common_config('xmpp', 'debug') ?
- XMPPHP_Log::LEVEL_VERBOSE : null);
- return $proxy;
- } else {
- return jabber_connect();
- }
-}
-
-/**
- * Lazy-connect the configured Jabber account to the configured server;
- * if already opened, the same connection will be returned.
- *
- * In a multi-site background process, each site configuration
- * will get its own connection.
- *
- * @param string $resource Resource to connect (defaults to configured resource)
- *
- * @return XMPPHP connection to the configured server
- */
-
-function jabber_connect($resource=null)
-{
- static $connections = array();
- $site = common_config('site', 'server');
- if (empty($connections[$site])) {
- if (empty($resource)) {
- $resource = common_config('xmpp', 'resource');
- }
- $conn = new Sharing_XMPP(common_config('xmpp', 'host') ?
- common_config('xmpp', 'host') :
- common_config('xmpp', 'server'),
- common_config('xmpp', 'port'),
- common_config('xmpp', 'user'),
- common_config('xmpp', 'password'),
- $resource,
- common_config('xmpp', 'server'),
- common_config('xmpp', 'debug') ?
- true : false,
- common_config('xmpp', 'debug') ?
- XMPPHP_Log::LEVEL_VERBOSE : null
- );
-
- if (!$conn) {
- return false;
- }
- $connections[$site] = $conn;
-
- $conn->autoSubscribe();
- $conn->useEncryption(common_config('xmpp', 'encryption'));
-
- try {
- common_log(LOG_INFO, __METHOD__ . ": connecting " .
- common_config('xmpp', 'user') . '/' . $resource);
- //$conn->connect(true); // true = persistent connection
- $conn->connect(); // persistent connections break multisite
- } catch (XMPPHP_Exception $e) {
- common_log(LOG_ERR, $e->getMessage());
- return false;
- }
-
- $conn->processUntil('session_start');
- }
- return $connections[$site];
-}
-
-/**
- * Queue send for a single notice to a given Jabber address
- *
- * @param string $to JID to send the notice to
- * @param Notice $notice notice to send
- *
- * @return boolean success value
- */
-
-function jabber_send_notice($to, $notice)
-{
- $conn = jabber_proxy();
- $profile = Profile::staticGet($notice->profile_id);
- if (!$profile) {
- common_log(LOG_WARNING, 'Refusing to send notice with ' .
- 'unknown profile ' . common_log_objstring($notice),
- __FILE__);
- return false;
- }
- $msg = jabber_format_notice($profile, $notice);
- $entry = jabber_format_entry($profile, $notice);
- $conn->message($to, $msg, 'chat', null, $entry);
- $profile->free();
- return true;
-}
-
-/**
- * extra information for XMPP messages, as defined by Twitter
- *
- * @param Profile $profile Profile of the sending user
- * @param Notice $notice Notice being sent
- *
- * @return string Extra information (Atom, HTML, addresses) in string format
- */
-
-function jabber_format_entry($profile, $notice)
-{
- $entry = $notice->asAtomEntry(true, true);
-
- $xs = new XMLStringer();
- $xs->elementStart('html', array('xmlns' => 'http://jabber.org/protocol/xhtml-im'));
- $xs->elementStart('body', array('xmlns' => 'http://www.w3.org/1999/xhtml'));
- $xs->element('a', array('href' => $profile->profileurl),
- $profile->nickname);
- $xs->text(": ");
- if (!empty($notice->rendered)) {
- $xs->raw($notice->rendered);
- } else {
- $xs->raw(common_render_content($notice->content, $notice));
- }
- $xs->text(" ");
- $xs->element('a', array(
- 'href'=>common_local_url('conversation',
- array('id' => $notice->conversation)).'#notice-'.$notice->id
- ),sprintf(_('[%s]'),$notice->id));
- $xs->elementEnd('body');
- $xs->elementEnd('html');
-
- $html = $xs->getString();
-
- return $html . ' ' . $entry;
-}
-
-/**
- * sends a single text message to a given JID
- *
- * @param string $to JID to send the message to
- * @param string $body body of the message
- * @param string $type type of the message
- * @param string $subject subject of the message
- *
- * @return boolean success flag
- */
-
-function jabber_send_message($to, $body, $type='chat', $subject=null)
-{
- $conn = jabber_proxy();
- $conn->message($to, $body, $type, $subject);
- return true;
-}
-
-/**
- * sends a presence stanza on the Jabber network
- *
- * @param string $status current status, free-form string
- * @param string $show structured status value
- * @param string $to recipient of presence, null for general
- * @param string $type type of status message, related to $show
- * @param int $priority priority of the presence
- *
- * @return boolean success value
- */
-
-function jabber_send_presence($status, $show='available', $to=null,
- $type = 'available', $priority=null)
-{
- $conn = jabber_connect();
- if (!$conn) {
- return false;
- }
- $conn->presence($status, $show, $to, $type, $priority);
- return true;
-}
-
-/**
- * sends a confirmation request to a JID
- *
- * @param string $code confirmation code for confirmation URL
- * @param string $nickname nickname of confirming user
- * @param string $address JID to send confirmation to
- *
- * @return boolean success flag
- */
-
-function jabber_confirm_address($code, $nickname, $address)
-{
- $body = 'User "' . $nickname . '" on ' . common_config('site', 'name') . ' ' .
- 'has said that your Jabber ID belongs to them. ' .
- 'If that\'s true, you can confirm by clicking on this URL: ' .
- common_local_url('confirmaddress', array('code' => $code)) .
- ' . (If you cannot click it, copy-and-paste it into the ' .
- 'address bar of your browser). If that user isn\'t you, ' .
- 'or if you didn\'t request this confirmation, just ignore this message.';
-
- return jabber_send_message($address, $body);
-}
-
-/**
- * sends a "special" presence stanza on the Jabber network
- *
- * @param string $type Type of presence
- * @param string $to JID to send presence to
- * @param string $show show value for presence
- * @param string $status status value for presence
- *
- * @return boolean success flag
- *
- * @see jabber_send_presence()
- */
-
-function jabber_special_presence($type, $to=null, $show=null, $status=null)
-{
- // FIXME: why use this instead of jabber_send_presence()?
- $conn = jabber_connect();
-
- $to = htmlspecialchars($to);
- $status = htmlspecialchars($status);
-
- $out = "<presence";
- if ($to) {
- $out .= " to='$to'";
- }
- if ($type) {
- $out .= " type='$type'";
- }
- if ($show == 'available' and !$status) {
- $out .= "/>";
- } else {
- $out .= ">";
- if ($show && ($show != 'available')) {
- $out .= "<show>$show</show>";
- }
- if ($status) {
- $out .= "<status>$status</status>";
- }
- $out .= "</presence>";
- }
- $conn->send($out);
-}
-
-/**
- * Queue broadcast of a notice to all subscribers and reply recipients
- *
- * This function will send a notice to all subscribers on the local server
- * who have Jabber addresses, and have Jabber notification enabled, and
- * have this subscription enabled for Jabber. It also sends the notice to
- * all recipients of @-replies who have Jabber addresses and Jabber notification
- * enabled. This is really the heart of Jabber distribution in StatusNet.
- *
- * @param Notice $notice The notice to broadcast
- *
- * @return boolean success flag
- */
-
-function jabber_broadcast_notice($notice)
-{
- if (!common_config('xmpp', 'enabled')) {
- return true;
- }
- $profile = Profile::staticGet($notice->profile_id);
-
- if (!$profile) {
- common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
- 'unknown profile ' . common_log_objstring($notice),
- __FILE__);
- return true; // not recoverable; discard.
- }
-
- $msg = jabber_format_notice($profile, $notice);
- $entry = jabber_format_entry($profile, $notice);
-
- $profile->free();
- unset($profile);
-
- $sent_to = array();
-
- $conn = jabber_proxy();
-
- $ni = $notice->whoGets();
-
- foreach ($ni as $user_id => $reason) {
- $user = User::staticGet($user_id);
- if (empty($user) ||
- empty($user->jabber) ||
- !$user->jabbernotify) {
- // either not a local user, or just not found
- continue;
- }
- switch ($reason) {
- case NOTICE_INBOX_SOURCE_REPLY:
- if (!$user->jabberreplies) {
- continue 2;
- }
- break;
- case NOTICE_INBOX_SOURCE_SUB:
- $sub = Subscription::pkeyGet(array('subscriber' => $user->id,
- 'subscribed' => $notice->profile_id));
- if (empty($sub) || !$sub->jabber) {
- continue 2;
- }
- break;
- case NOTICE_INBOX_SOURCE_GROUP:
- break;
- default:
- throw new Exception(sprintf(_("Unknown inbox source %d."), $reason));
- }
-
- common_log(LOG_INFO,
- 'Sending notice ' . $notice->id . ' to ' . $user->jabber,
- __FILE__);
- $conn->message($user->jabber, $msg, 'chat', null, $entry);
- }
-
- return true;
-}
-
-/**
- * Queue send of a notice to all public listeners
- *
- * For notices that are generated on the local system (by users), we can optionally
- * forward them to remote listeners by XMPP.
- *
- * @param Notice $notice notice to broadcast
- *
- * @return boolean success flag
- */
-
-function jabber_public_notice($notice)
-{
- // Now, users who want everything
-
- $public = common_config('xmpp', 'public');
-
- // FIXME PRIV don't send out private messages here
- // XXX: should we send out non-local messages if public,localonly
- // = false? I think not
-
- if ($public && $notice->is_local == Notice::LOCAL_PUBLIC) {
- $profile = Profile::staticGet($notice->profile_id);
-
- if (!$profile) {
- common_log(LOG_WARNING, 'Refusing to broadcast notice with ' .
- 'unknown profile ' . common_log_objstring($notice),
- __FILE__);
- return true; // not recoverable; discard.
- }
-
- $msg = jabber_format_notice($profile, $notice);
- $entry = jabber_format_entry($profile, $notice);
-
- $conn = jabber_proxy();
-
- foreach ($public as $address) {
- common_log(LOG_INFO,
- 'Sending notice ' . $notice->id .
- ' to public listener ' . $address,
- __FILE__);
- $conn->message($address, $msg, 'chat', null, $entry);
- }
- $profile->free();
- }
-
- return true;
-}
-
-/**
- * makes a plain-text formatted version of a notice, suitable for Jabber distribution
- *
- * @param Profile &$profile profile of the sending user
- * @param Notice &$notice notice being sent
- *
- * @return string plain-text version of the notice, with user nickname prefixed
- */
-
-function jabber_format_notice(&$profile, &$notice)
-{
- return $profile->nickname . ': ' . $notice->content . ' [' . $notice->id . ']';
-}
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