php dns解析类
分享一个php操作dns的类,可用于dns的查询、dns解析等操作,有需要的朋友参考下。
php实现的dns解析类,如下: <?php /* ----------- PHPresolver - PHP DNS resolver library Version 1.1 This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ---------------------------------------------- */ define( "DNS_RECORDTYPE_A", 1 ); define( "DNS_RECORDTYPE_NS", 2 ); define( "DNS_RECORDTYPE_CNAME", 5 ); define( "DNS_RECORDTYPE_SOA", 6 ); define( "DNS_RECORDTYPE_PTR", 12 ); define( "DNS_RECORDTYPE_MX", 15 ); define( "DNS_RECORDTYPE_AAAA", 28 ); define( "DNS_RECORDTYPE_ANY", 255 ); define( "DNS_RECORDTYPE_TXT", 16 ); /* list of record types not yet implemented define( "DNS_RECORDTYPE_A6", 38 ); define( "DNS_RECORDTYPE_NULL", 10 ); define( "DNS_RECORDTYPE_OPT", 41 ); define( "DNS_RECORDTYPE_TKEY", 249 ); define( "DNS_RECORDTYPE_TSIG", 250 ); define( "DNS_RECORDTYPE_IXFR", 251 ); define( "DNS_RECORDTYPE_AXFR", 252 ); define( "DNS_RECORDTYPE_MAILB", 253 ); define( "DNS_RECORDTYPE_MAILA", 254 ); define( "DNS_RECORDTYPE_MD", 3 ); define( "DNS_RECORDTYPE_MF", 4 ); define( "DNS_RECORDTYPE_MB", 7 ); define( "DNS_RECORDTYPE_MG", 8 ); define( "DNS_RECORDTYPE_MR", 9 ); define( "DNS_RECORDTYPE_WKS", 11 ); define( "DNS_RECORDTYPE_HINFO", 13 ); define( "DNS_RECORDTYPE_MINFO", 14 ); define( "DNS_RECORDTYPE_RP", 17 ); define( "DNS_RECORDTYPE_AFSDB", 18 ); define( "DNS_RECORDTYPE_X25", 19 ); define( "DNS_RECORDTYPE_ISDN", 20 ); define( "DNS_RECORDTYPE_RT", 21 ); define( "DNS_RECORDTYPE_NSAP", 22 ); define( "DNS_RECORDTYPE_NSAP_PTR", 23 ); define( "DNS_RECORDTYPE_SIG", 24 ); define( "DNS_RECORDTYPE_KEY", 25 ); define( "DNS_RECORDTYPE_PX", 26 ); define( "DNS_RECORDTYPE_GPOS", 27 ); define( "DNS_RECORDTYPE_LOC", 29 ); define( "DNS_RECORDTYPE_NXT", 30 ); define( "DNS_RECORDTYPE_EID", 31 ); define( "DNS_RECORDTYPE_NIMLOC", 32 ); define( "DNS_RECORDTYPE_SRV", 33 ); define( "DNS_RECORDTYPE_ATMA", 34 ); define( "DNS_RECORDTYPE_NAPTR", 35 ); define( "DNS_RECORDTYPE_KX", 36 ); define( "DNS_RECORDTYPE_CERT", 37 ); */ define( "DNS_OPCODE_QUERY" , 0x0000 ); define( "DNS_OPCODE_IQUERY", 0x0800 ); define( "DNS_OPCODE_STATUS", 0x1000 ); define( "DNS_OPCODE_NOTIFY", 0x1800 ); define( "DNS_OPCODE_UPDATE", 0x2000 ); define( "DNS_RCODE_SUCCESSFUL" , 0x0001 ); define( "DNS_RCODE_MALFORMATED" , 0x0002 ); define( "DNS_RCODE_FAILEDSERVER" , 0x0003 ); define( "DNS_RCODE_NAMEERROR" , 0x0004 ); define( "DNS_RCODE_UNIMPLEMENTED", 0x0005 ); define( "DNS_RCODE_REFUSED" , 0x0006 ); define( "DNS_HEADERSPEC_IS_RESPONSE" , 0x8000 ); define( "DNS_HEADERSPEC_OPCODE_MASK" , 0x7800 ); define( "DNS_HEADERSPEC_AUTHORITIVE_ANSWER" , 0x0400 ); define( "DNS_HEADERSPEC_TRUNCATED" , 0x0200 ); define( "DNS_HEADERSPEC_RECURSION_DESIRED" , 0x0100 ); define( "DNS_HEADERSPEC_RECURSION_AVAILABLE" , 0x0080 ); define( "DNS_HEADERSPEC_RESPONSE_SPEC_MASK" , 0x0480 ); define( "DNS_HEADERSPEC_QUERY_SPEC_MASK" , 0x0300 ); define( "DNS_HEADERSPEC_RESERVED" , 0x0e00 ); define( "DNS_HEADERSPEC_RESULT_CODE_MASK" , 0x000f ); define( "DNS_CLASS_INTERNET" , 0x0001 ); define( "DNS_UDP_PACKET_MAX_LENGTH", 512 ); class DNSRecord { var $type; var $name; var $dclass; var $ttl; var $specific_fields; function DNSRecord( $name, $type, $dclass = DNS_CLASS_INTERNET, $ttl = 0, $specific_fields = false ) { $this->name = $name; $this->type = $type; $this->dclass = $dclass; $this->ttl = $ttl; $this->specific_fields = $specific_fields; } function &getTypeSpecificField( $name ) { if( $this->specific_fields ) { return $this->specific_fields[$name]; } return false; } } class DNSResolver { var $port; var $nameserver; var $timeout; function DNSResolver( $nameserver, $port = 53, $timeout = 1000000 ) { $this->port = $port; $this->nameserver = $nameserver; $this->timeout = $timeout; } function sendQuery( $dnsquery, $useTCP = false ) { $answer = false; $out_buf = $dnsquery->asOctets( false ); $out_buf_len = strlen( $out_buf ); if( $out_buf ) { if( $useTCP == false && $out_buf_len <= DNS_UDP_PACKET_MAX_LENGTH ) { /* connection by UDP */ if( ( $sock = fsockopen( 'udp://'.$this->nameserver, $this->port, $this->timeout ) ) === false ) { return false; } socket_set_blocking( $sock, true ); if( fwrite( $sock, $out_buf ) == $out_buf_len ) { $answer = new DNSAnswer( $sock, DNS_UDP_PACKET_MAX_LENGTH ); } fclose( $sock ); } else { /* connection by TCP */ if( ( $sock = fsockopen( $this->nameserver, $this->port, $this->timeout ) ) === false ) { return false; } socket_set_blocking( $sock, true ); if( fwrite( $sock, pack( 'n', $out_buf_len ) ) == 2 && fwrite( $sock, $out_buf ) == $out_buf_len ) { $tmp = unpack( 'nl', fread( $sock, 2 ) ); $limit_length = $tmp['l']; print $limit_length; $answer = new DNSAnswer( $sock, $limit_length ); } fclose( $sock ); } } return $answer; } } class DNSQuery { var $id; // 1 - 65535 var $header_opcode; var $query_record; var $flags; function DNSQuery( &$dnsrecord, $flags = DNS_HEADERSPEC_RECURSION_DESIRED ) { $this->id = rand( 1, 255 ) | ( rand( 0, 255 ) << 8 ); $this->flags = $flags & DNS_HEADERSPEC_QUERY_SPEC_MASK; $this->header_opcode = DNS_OPCODE_QUERY; $this->query_record = &$dnsrecord; } function asOctets() { if( $this->query_record->name === false ) { return false; } $buf = ''; $buf .= pack( "nnnnnn", $this->id, DNS_OPCODE_QUERY | $this->flags, 1, 0, 0, 0 ); $buf .= $this->query_record->name->asOctets(); $buf .= pack( "nn", $this->query_record->type, $this->query_record->dclass ); return $buf; } } class DNSMessageParser { var $stream; var $nbytes_read; var $octets; var $limit; function DNSMessageParser( $stream, $limit ) { $this->stream = $stream; $this->nbytes_read = 0; $this->octets = ''; $this->limit = $limit; } function readStreamDirectly( $nbytes ) { if( ( $this->limit -= $nbytes ) < 0 ) { return false; } $buf = fread( $this->stream, $nbytes ); $this->octets .= $buf; $this->nbytes_read += $nbytes; return $buf; } function readBufferedStream( $nbytes, $offset ) { if( $offset < $this->nbytes_read ) { $diff = $this->nbytes_read - $offset; if( $nbytes <= $diff ) { return substr( $this->octets, $offset, $nbytes ); } else { $buf = substr( $this->octets, $offset, $diff ); $nbytes -= $diff; } } else { $buf = ''; while( $offset > $this->nbytes_read ) { if( $this->readStreamDirectly( $offset - $this->nbytes_read ) === false ) { return false; } } } if( ( $_buf = $this->readStreamDirectly( $nbytes ) ) === false ) { return false; } $buf .= $_buf; return $buf; } function getHeaderInfo() { if( ( $buf = $this->readStreamDirectly( 12 ) ) === false ) { $this = false; return; } return unpack( "nid/nspec/nqdcount/nancount/nnscount/narcount", $buf ); } function getQueryRecords( $nrecs ) { $recs = array(); while( --$nrecs >= 0 ) { if( ( $labels = $this->getLabels() ) === false ) { $this = false; return; } if( ( $buf = $this->readStreamDirectly( 4 ) ) === false ) { $this = false; return; } $info = unpack( "ntype/ndclass", $buf ); $recs[] = new DNSRecord( new DNSName( $labels ), $info['type'], $info['dclass'] ); } return $recs; } function getResourceRecords( $nrecs ) { $recs = array(); while( --$nrecs >= 0 ) { if( ( $labels = $this->getLabels() ) === false ) { return false; } if( ( $buf = $this->readStreamDirectly( 10 ) ) === false ) { return false; } $info = unpack( "ntype/ndclass/Nttl/nrdlength", $buf ); switch( $info['type'] ) { case DNS_RECORDTYPE_CNAME: case DNS_RECORDTYPE_NS: case DNS_RECORDTYPE_PTR: if( ($_labels = $this->getLabels($info['rdlength']) ) === false ) { return false; } $specific_fields = array( 'dname' => new DNSName( $_labels ) ); break; case DNS_RECORDTYPE_TXT: if( ($_labels = $this->getLabels($info['rdlength']) ) === false ) { return false; } $specific_fields = array( 'text' => $_labels ); break; case DNS_RECORDTYPE_MX: if( ( $buf = $this->readStreamDirectly(2) ) === false ) { return false; } $specific_fields = unpack( 'npreference', $buf ); if( ( $_labels = $this->getLabels($info['rdlength']-2) ) === false ) { return false; } $specific_fields['exchange'] = new DNSName( $_labels ); break; case DNS_RECORDTYPE_A: if( ( $buf = $this->readStreamDirectly(4) ) === false ) { return false; } $specific_fields = array( 'address' => DNSName::newFromString( implode( '.', unpack( 'Ca/Cb/Cc/Cd', $buf ) ) ) ); break; case DNS_RECORDTYPE_AAAA: if( ( $buf = $this->readStreamDirectly(16) ) === false ) { return false; } $specific_fields = array( 'address' => DNSName::newFromString( implode( '.', unpack( 'Ca/Cb/Cc/Cd/Ce/Cf/Cg/Ch/Ci/Cj/Ck/Cl/Cm/Cn/Co/Cp', $buf ) ).'.IP6.ARPA' ) ); break; case DNS_RECORDTYPE_SOA: $specific_fields = array(); if( ($_labels = $this->getLabels($info['rdlength']) ) === false ) { return false; } $specific_fields['source'] = new DNSName( $_labels ); if( ($_labels = $this->getLabels($info['rdlength']) ) === false ) { return false; } $specific_fields['resp_person'] = array_shift( $_labels ).'@'; $specific_fields['resp_person'] .= implode( '.', $_labels ); if( ( $buf = $this->readStreamDirectly(20) ) === false ) { return false; } $specific_fields = array_merge( $specific_fields, unpack( 'Nserial/Nrefresh/Nretry/Nexpire/Nminttl', $buf ) ); break; default: if( $this->readStreamDirectly( $info['rdlength'] ) === false ) { return false; } $specific_fields = false; } $recs[] = new DNSRecord( new DNSName( $labels ), $info['type'], $info['dclass'], $info['ttl'], $specific_fields ); } return $recs; } function getLabels( $max_length = 255, $offset = -1 ) { if( $offset < 0 ) { $offset = $this->nbytes_read; } $labels = array(); for(;;) { if( --$max_length < 0 ) { return false; } if( ( $buf = $this->readBufferedStream( 1, $offset ) ) === false ) { return false; } $label_len = ord( $buf ); ++$offset; if( $label_len < 64 ) { /* uncompressed */ if( ( $max_length -= $label_len ) < 0 ) { return false; } if( ( $labels[] = $this->readBufferedStream( $label_len, $offset ) ) === false ) { return false; } $offset += $label_len; if( $label_len == 0 ) { break; } } else { /* compressed */ if( ( $buf = $this->readBufferedStream( 1, $offset ) ) === false ) { return false; } if( --$max_length < 0 ) { return false; } $_offset = ( ( $label_len & 0x3f ) << 8 ) + ord( $buf ); if( ($_labels = $this->getLabels( $offset - $_offset, $_offset )) === false ) { return false; } $labels = array_merge( $labels, $_labels ); break; } } return $labels; } } class DNSAnswer { var $id; var $result_code; var $flags; var $rec_query; var $rec_answer; var $rec_authority; var $rec_additional; function DNSAnswer( &$stream, $limit ) { $msgparser = new DNSMessageParser( $stream, $limit ); $info = & $msgparser->getHeaderInfo(); $this->id = $info['id']; $this->result_code = $info['spec'] & DNS_HEADERSPEC_RESULT_CODE_MASK; $this->flags = $info['spec'] & DNS_HEADERSPEC_RESPONSE_SPEC_MASK; $nrec_query = $info['qdcount']; $nrec_answer = $info['ancount']; $nrec_authority = $info['nscount']; $nrec_additional = $info['arcount']; if( ( $this->rec_query = &$msgparser->getQueryRecords( $nrec_query ) ) === false ) { $this = false; return; } if( ( $this->rec_answer = &$msgparser->getResourceRecords( $nrec_answer ) ) === false ) { $this = false; return; } if( ( $this->rec_authority = &$msgparser->getResourceRecords( $nrec_authority ) ) === false ) { $this = false; return; } if( ( $this->rec_additional = &$msgparser->getResourceRecords( $nrec_additional ) ) === false ) { $this = false; return; } } } class DNSName { var $labels; function DNSName( $labels ) { $this->labels = & $labels; } function isRealDomainName() { $i = count( $this->labels ) - 1; if( $i >= 1 && strtoupper($this->labels[$i-1]) == 'ARPA' ) { return false; } return true; } function newFromString( $domain_name ) { if( strpos( $domain_name, ':' ) !== false && !ereg( '[^0-9a-fA-f:.]', $domain_name ) ) { /* IPv6 address literal expression spec */ $labels = array(); $components = explode( ':', $domain_name ); $ncomponents = count($components); $offset = $ncomponents; while( --$offset >= 0 ) { $subcomps = explode( '.', $components[$offset] ); $nsubcomps = count( $subcomps ); if( $nsubcomps == 1 ) { if( $subcomps[0] == '' ) { $_offset = 0; while( $components[$_offset] != '' ) { ++$_offset; } $count = 9-($ncomponents-$offset)+$_offset; while( --$count >= 0 ) { $labels[] = '0'; $labels[] = '0'; $labels[] = '0'; $labels[] = '0'; } if( $_offset < $offset ) { $offset = $_offset; } } else { $compval = hexdec( $subcomps[0] ); $labels[] = dechex( $compval & 0x0f ); $compval >>= 4; $labels[] = dechex( $compval & 0x0f ); $compval >>= 4; $labels[] = dechex( $compval & 0x0f ); $compval >>= 4; $labels[] = dechex( $compval & 0x0f ); $compval >>= 4; } } elseif( $nsubcomps == 4 ) { $labels[] = dechex( $subcomps[3] ); $labels[] = dechex( $subcomps[2] ); $labels[] = dechex( $subcomps[1] ); $labels[] = dechex( $subcomps[0] ); } else { return false; } } $labels[] = 'IP6'; $labels[] = 'ARPA'; $labels[] = ''; } else { if( substr( $domain_name, -1, 1 ) != '.' ) { $domain_name .= '.'; } $labels = explode( '.', $domain_name ); $nlabels = count( $labels ); if( $nlabels == 5 && !ereg( '[^0-9.]', $domain_name ) ) { /* IPv4 raw address literal representation spec */ $tmp = (string)$labels[0]; $labels[0] = (string)$labels[3]; $labels[3] = $tmp; $tmp = (string)$labels[1]; $labels[1] = (string)$labels[2]; $labels[2] = $tmp; $labels[4] = 'IN-ADDR'; $labels[5] = 'ARPA'; $labels[6] = ''; } } return new DNSName( $labels ); } function asOctets() { $upto = count( $this->labels ); $buf = ''; for( $offset = 0; $offset < $upto; ++$offset ) { $label_len = strlen( $this->labels[$offset] ); $buf .= pack( "C", $label_len ).$this->labels[$offset]; } return $buf; } function getCanonicalName() { return implode( ".", $this->labels ); } } ?> Nach dem Login kopieren |

Heiße KI -Werkzeuge

Undresser.AI Undress
KI-gestützte App zum Erstellen realistischer Aktfotos

AI Clothes Remover
Online-KI-Tool zum Entfernen von Kleidung aus Fotos.

Undress AI Tool
Ausziehbilder kostenlos

Clothoff.io
KI-Kleiderentferner

AI Hentai Generator
Erstellen Sie kostenlos Ai Hentai.

Heißer Artikel

Heiße Werkzeuge

Notepad++7.3.1
Einfach zu bedienender und kostenloser Code-Editor

SublimeText3 chinesische Version
Chinesische Version, sehr einfach zu bedienen

Senden Sie Studio 13.0.1
Leistungsstarke integrierte PHP-Entwicklungsumgebung

Dreamweaver CS6
Visuelle Webentwicklungstools

SublimeText3 Mac-Version
Codebearbeitungssoftware auf Gottesniveau (SublimeText3)

Heiße Themen



Laravel vereinfacht die Behandlung von temporären Sitzungsdaten mithilfe seiner intuitiven Flash -Methoden. Dies ist perfekt zum Anzeigen von kurzen Nachrichten, Warnungen oder Benachrichtigungen in Ihrer Anwendung. Die Daten bestehen nur für die nachfolgende Anfrage standardmäßig: $ Anfrage-

Die PHP Client -URL -Erweiterung (CURL) ist ein leistungsstarkes Tool für Entwickler, das eine nahtlose Interaktion mit Remote -Servern und REST -APIs ermöglicht. Durch die Nutzung von Libcurl, einer angesehenen Bibliothek mit Multi-Protokoll-Dateien, erleichtert PHP Curl effiziente Execu

Laravel bietet eine kurze HTTP -Antwortsimulationssyntax und vereinfache HTTP -Interaktionstests. Dieser Ansatz reduziert die Code -Redundanz erheblich, während Ihre Testsimulation intuitiver wird. Die grundlegende Implementierung bietet eine Vielzahl von Verknüpfungen zum Antworttyp: Verwenden Sie Illuminate \ Support \ facades \ http; Http :: fake ([ 'Google.com' => 'Hallo Welt',, 'github.com' => ['foo' => 'bar'], 'Forge.laravel.com' =>

Möchten Sie den dringlichsten Problemen Ihrer Kunden in Echtzeit und Sofortlösungen anbieten? Mit Live-Chat können Sie Echtzeitgespräche mit Kunden führen und ihre Probleme sofort lösen. Sie ermöglichen es Ihnen, Ihrem Brauch einen schnelleren Service zu bieten

Alipay PHP ...

In Artikel wird die in PHP 5.3 eingeführte LSB -Bindung (LSB) erörtert, die die Laufzeitauflösung der statischen Methode ermöglicht, um eine flexiblere Vererbung zu erfordern. Die praktischen Anwendungen und potenziellen Perfo von LSB

In dem Artikel werden Frameworks hinzugefügt, das sich auf das Verständnis der Architektur, das Identifizieren von Erweiterungspunkten und Best Practices für die Integration und Debuggierung hinzufügen.

In Artikel werden wichtige Sicherheitsfunktionen in Frameworks erörtert, um vor Schwachstellen zu schützen, einschließlich Eingabevalidierung, Authentifizierung und regelmäßigen Aktualisierungen.
