MediaWiki master
UDPTransport.php
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1<?php
21use Wikimedia\IPUtils;
22
34 // Limit to 64 KiB
35 public const MAX_PAYLOAD_SIZE = 65507;
36 private $host, $port, $prefix, $domain;
37
44 public function __construct( $host, $port, $domain, $prefix = false ) {
45 $this->host = $host;
46 $this->port = $port;
47 $this->domain = $domain;
48 $this->prefix = $prefix;
49 }
50
56 public static function newFromString( $info ) {
57 if ( preg_match( '!^udp:(?://)?\[([0-9a-fA-F:]+)\]:(\d+)(?:/(.*))?$!', $info, $m ) ) {
58 // IPv6 bracketed host
59 $host = $m[1];
60 $port = intval( $m[2] );
61 $prefix = $m[3] ?? false;
62 $domain = AF_INET6;
63 } elseif ( preg_match( '!^udp:(?://)?([a-zA-Z0-9.-]+):(\d+)(?:/(.*))?$!', $info, $m ) ) {
64 $host = $m[1];
65 if ( !IPUtils::isIPv4( $host ) ) {
66 $host = gethostbyname( $host );
67 }
68 $port = intval( $m[2] );
69 $prefix = $m[3] ?? false;
70 $domain = AF_INET;
71 } else {
72 throw new InvalidArgumentException( __METHOD__ . ': Invalid UDP specification' );
73 }
74
75 return new self( $host, $port, $domain, $prefix );
76 }
77
81 public function emit( $text ): void {
82 // Clean it up for the multiplexer
83 if ( $this->prefix !== false ) {
84 $text = preg_replace( '/^/m', $this->prefix . ' ', $text );
85
86 if ( strlen( $text ) > self::MAX_PAYLOAD_SIZE - 1 ) {
87 $text = substr( $text, 0, self::MAX_PAYLOAD_SIZE - 1 );
88 }
89
90 if ( substr( $text, -1 ) != "\n" ) {
91 $text .= "\n";
92 }
93 } elseif ( strlen( $text ) > self::MAX_PAYLOAD_SIZE ) {
94 $text = substr( $text, 0, self::MAX_PAYLOAD_SIZE );
95 }
96
97 $sock = socket_create( $this->domain, SOCK_DGRAM, SOL_UDP );
98 if ( !$sock ) { // @todo should this throw an exception?
99 return;
100 }
101
102 socket_sendto( $sock, $text, strlen( $text ), 0, $this->host, $this->port );
103 socket_close( $sock );
104 }
105}
if(!defined('MW_SETUP_CALLBACK'))
Definition WebStart.php:81
A generic class to send a message over UDP.
const MAX_PAYLOAD_SIZE
static newFromString( $info)
__construct( $host, $port, $domain, $prefix=false)