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wget 'https://lists2.roe3.org/pmnl3/include/lib/Net/DNS/Header.php'<?php
/*
* License Information:
*
* Net_DNS: A resolver library for PHP
* Copyright (c) 2002-2003 Eric Kilfoil eric@ypass.net
*
* 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 (at your option) 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
*/
/* Net_DNS_Header object definition {{{ */
/**
* Object representation of the HEADER section of a DNS packet
*
* The Net_DNS::Header class contains the values of a DNS packet. It parses
* the header of a DNS packet or can generate the binary data
* representation of the packet. The format of the header is described in
* RFC1035.
*
* @package Net_DNS
*/
class Net_DNS_Header
{
/* class variable definitions {{{ */
/**
* The packet's request id
*
* The request id of the packet represented as a 16 bit integer.
*/
var $id;
/**
* The QR bit in a DNS packet header
*
* The QR bit as described in RFC1035. QR is set to 0 for queries, and
* 1 for repsones.
*/
var $qr;
/**
* The OPCODE name of this packet.
*
* The string value (name) of the opcode for the DNS packet.
*/
var $opcode;
/**
* The AA (authoritative answer) bit in a DNS packet header
*
* The AA bit as described in RFC1035. AA is set to 1 if the answer
* is authoritative. It has no meaning if QR is set to 0.
*/
var $aa;
/**
* The TC (truncated) bit in a DNS packet header
*
* This flag is set to 1 if the response was truncated. This flag has
* no meaning in a query packet.
*/
var $tc;
/**
* The RD (recursion desired) bit in a DNS packet header
*
* This bit should be set to 1 in a query if recursion is desired by
* the DNS server.
*/
var $rd;
/**
* The RA (recursion available) bit in a DNS packet header
*
* This bit is set to 1 by the DNS server if the server is willing to
* perform recursion.
*/
var $ra;
/**
* The RCODE name for this packet.
*
* The string value (name) of the rcode for the DNS packet.
*/
var $rcode;
/**
* Number of questions contained within the packet
*
* 16bit integer representing the number of questions in the question
* section of the DNS packet.
*
* @var integer $qdcount
* @see Net_DNS_Question class
*/
var $qdcount;
/**
* Number of answer RRs contained within the packet
*
* 16bit integer representing the number of answer resource records
* contained in the answer section of the DNS packet.
*
* @var integer $ancount
* @see Net_DNS_RR class
*/
var $ancount;
/**
* Number of authority RRs within the packet
*
* 16bit integer representing the number of authority (NS) resource
* records contained in the authority section of the DNS packet.
*
* @var integer $nscount
* @see Net_DNS_RR class
*/
var $nscount;
/**
* Number of additional RRs within the packet
*
* 16bit integer representing the number of additional resource records
* contained in the additional section of the DNS packet.
*
* @var integer $arcount
* @see Net_DNS_RR class
*/
var $arcount;
/* }}} */
/* class constructor - Net_DNS_Header($data = "") {{{ */
/**
* Initializes the default values for the Header object.
*
* Builds a header object from either default values, or from a DNS
* packet passed into the constructor as $data
*
* @param string $data A DNS packet of which the header will be parsed.
* @return object Net_DNS_Header
* @access public
*/
function Net_DNS_Header($data = '')
{
if ($data != '') {
/*
* The header MUST be at least 12 bytes.
* Passing the full datagram to this constructor
* will examine only the header section of the DNS packet
*/
if (strlen($data) < 12)
return false;
$a = unpack('nid/C2flags/n4counts', $data);
$this->id = $a['id'];
$this->qr = ($a['flags1'] >> 7) & 0x1;
$this->opcode = ($a['flags1'] >> 3) & 0xf;
$this->aa = ($a['flags1'] >> 2) & 0x1;
$this->tc = ($a['flags1'] >> 1) & 0x1;
$this->rd = $a['flags1'] & 0x1;
$this->ra = ($a['flags2'] >> 7) & 0x1;
$this->rcode = $a['flags2'] & 0xf;
$this->qdcount = $a['counts1'];
$this->ancount = $a['counts2'];
$this->nscount = $a['counts3'];
$this->arcount = $a['counts4'];
}
else {
$this->id = Net_DNS_Resolver::nextid();
$this->qr = 0;
$this->opcode = 0;
$this->aa = 0;
$this->tc = 0;
$this->rd = 1;
$this->ra = 0;
$this->rcode = 0;
$this->qdcount = 1;
$this->ancount = 0;
$this->nscount = 0;
$this->arcount = 0;
}
if (Net_DNS::opcodesbyval($this->opcode)) {
$this->opcode = Net_DNS::opcodesbyval($this->opcode);
}
if (Net_DNS::rcodesbyval($this->rcode)) {
$this->rcode = Net_DNS::rcodesbyval($this->rcode);
}
}
/* }}} */
/* Net_DNS_Header::display() {{{ */
/**
* Displays the properties of the header.
*
* Displays the properties of the header.
*
* @access public
*/
function display()
{
echo $this->string();
}
/* }}} */
/* Net_DNS_Header::string() {{{ */
/**
* Returns a formatted string containing the properties of the header.
*
* @return string a formatted string containing the properties of the header.
* @access public
*/
function string()
{
$retval = ';; id = ' . $this->id . "\n";
if ($this->opcode == 'UPDATE') {
$retval .= ';; qr = ' . $this->qr . ' ' .
'opcode = ' . $this->opcode . ' ' .
'rcode = ' . $this->rcode . "\n";
$retval .= ';; zocount = ' . $this->qdcount . ' ' .
'prcount = ' . $this->ancount . ' ' .
'upcount = ' . $this->nscount . ' ' .
'adcount = ' . $this->arcount . "\n";
} else {
$retval .= ';; qr = ' . $this->qr . ' ' .
'opcode = ' . $this->opcode . ' ' .
'aa = ' . $this->aa . ' ' .
'tc = ' . $this->tc . ' ' .
'rd = ' . $this->rd . "\n";
$retval .= ';; ra = ' . $this->ra . ' ' .
'rcode = ' . $this->rcode . "\n";
$retval .= ';; qdcount = ' . $this->qdcount . ' ' .
'ancount = ' . $this->ancount . ' ' .
'nscount = ' . $this->nscount . ' ' .
'arcount = ' . $this->arcount . "\n";
}
return $retval;
}
/* }}} */
/* Net_DNS_Header::data() {{{ */
/**
* Returns the binary data containing the properties of the header
*
* Packs the properties of the Header object into a binary string
* suitable for using as the Header section of a DNS packet.
*
* @return string binary representation of the header object
* @access public
*/
function data()
{
$opcode = Net_DNS::opcodesbyname($this->opcode);
$rcode = Net_DNS::rcodesbyname($this->rcode);
$byte2 = ($this->qr << 7)
| ($opcode << 3)
| ($this->aa << 2)
| ($this->tc << 1)
| ($this->rd);
$byte3 = ($this->ra << 7) | $rcode;
return pack('nC2n4', $this->id,
$byte2,
$byte3,
$this->qdcount,
$this->ancount,
$this->nscount,
$this->arcount);
}
/* }}} */
}
/* }}} */
/* VIM settings {{{
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* soft-stop-width: 4
* c indent on
* expandtab on
* End:
* vim600: sw=4 ts=4 sts=4 cindent fdm=marker et
* vim<600: sw=4 ts=4
* }}} */
?>wget 'https://lists2.roe3.org/pmnl3/include/lib/Net/DNS/Packet.php'<?php
/*
* License Information:
*
* Net_DNS: A resolver library for PHP
* Copyright (c) 2002-2003 Eric Kilfoil eric@ypass.net
*
* 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 (at your option) 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
*/
/* Net_DNS_Packet object definition {{{ */
/**
* A object represation of a DNS packet (RFC1035)
*
* This object is used to manage a DNS packet. It contains methods for
* DNS packet compression as defined in RFC1035, as well as parsing a DNS
* packet response from a DNS server, or building a DNS packet from the
* instance variables contained in the class.
*
* @package Net_DNS
*/
class Net_DNS_Packet
{
/* class variable definitions {{{ */
/**
* debugging flag
*
* If set to true (non-zero), debugging code will be displayed as the
* packet is parsed.
*
* @var boolean $debug
* @access public
*/
var $debug;
/**
* A packet Header object.
*
* An object of type Net_DNS_Header which contains the header
* information of the packet.
*
* @var object Net_DNS_Header $header
* @access public
*/
var $header;
/**
* A hash of compressed labels
*
* A list of all labels which have been compressed in the DNS packet
* and the location offset of the label within the packet.
*
* @var array $compnames
*/
var $compnames;
/**
* The origin of the packet, if the packet is a server response.
*
* This contains a string containing the IP address of the name server
* from which the answer was given.
*
* @var string $answerfrom
* @access public
*/
var $answerfrom;
/**
* The size of the answer packet, if the packet is a server response.
*
* This contains a integer containing the size of the DNS packet the
* server responded with if this packet was received by a DNS server
* using the query() method.
*
* @var string $answersize
* @access public
*/
var $answersize;
/**
* An array of Net_DNS_Question objects
*
* Contains all of the questions within the packet. Each question is
* stored as an object of type Net_DNS_Question.
*
* @var array $question
* @access public
*/
var $question;
/**
* An array of Net_DNS_RR ANSWER objects
*
* Contains all of the answer RRs within the packet. Each answer is
* stored as an object of type Net_DNS_RR.
*
* @var array $answer
* @access public
*/
var $answer;
/**
* An array of Net_DNS_RR AUTHORITY objects
*
* Contains all of the authority RRs within the packet. Each authority is
* stored as an object of type Net_DNS_RR.
*
* @var array $authority
* @access public
*/
var $authority;
/**
* An array of Net_DNS_RR ADDITIONAL objects
*
* Contains all of the additional RRs within the packet. Each additional is
* stored as an object of type Net_DNS_RR.
*
* @var array $additional
* @access public
*/
var $additional;
/* }}} */
/* class constructor - Net_DNS_Packet($debug = false) {{{ */
/*
* unfortunately (or fortunately), we can't follow the same
* silly method for determining if name is a hostname or a packet
* stream in PHP, since there is no ref() function. So we're going
* to define a new method called parse to deal with this
* circumstance and another method called buildQuestion to build a question.
* I like it better that way anyway.
*/
/**
* Initalizes a Net_DNS_Packet object
*
* @param boolean $debug Turns debugging on or off
*/
function Net_DNS_Packet($debug = false)
{
$this->debug = $debug;
$this->compnames = array();
}
/* }}} */
/* Net_DNS_Packet::buildQuestion($name, $type = "A", $class = "IN") {{{ */
/**
* Adds a DNS question to the DNS packet
*
* @param string $name The name of the record to query
* @param string $type The type of record to query
* @param string $class The class of record to query
* @see Net_DNS::typesbyname(), Net_DNS::classesbyname()
*/
function buildQuestion($name, $type = 'A', $class = 'IN')
{
$this->header = new Net_DNS_Header();
$this->header->qdcount = 1;
$this->question[0] = new Net_DNS_Question($name, $type, $class);
$this->answer = null;
$this->authority = null;
$this->additional = null;
/* Do not print question packet
if ($this->debug) {
$this->display();
}
*/
}
/* }}} */
/* Net_DNS_Packet::parse($data) {{{ */
/**
* Parses a DNS packet returned by a DNS server
*
* Parses a complete DNS packet and builds an object hierarchy
* containing all of the parts of the packet:
* <ul>
* <li>HEADER
* <li>QUESTION
* <li>ANSWER || PREREQUISITE
* <li>ADDITIONAL || UPDATE
* <li>AUTHORITY
* </ul>
*
* @param string $data A binary string containing a DNS packet
* @return boolean true on success, null on parser error
*/
function parse($data)
{
if ($this->debug) {
echo ';; HEADER SECTION' . "\n";
}
$this->header = new Net_DNS_Header($data);
if ($this->debug) {
$this->header->display();
}
/*
* Print and parse the QUESTION section of the packet
*/
if ($this->debug) {
echo "\n";
$section = ($this->header->opcode == 'UPDATE') ? 'ZONE' : 'QUESTION';
echo ";; $section SECTION (" . $this->header->qdcount . ' record' .
($this->header->qdcount == 1 ? '' : 's') . ")\n";
}
$offset = 12;
$this->question = array();
for ($ctr = 0; $ctr < $this->header->qdcount; $ctr++) {
list($qobj, $offset) = $this->parse_question($data, $offset);
if (is_null($qobj)) {
return null;
}
$this->question[count($this->question)] = $qobj;
if ($this->debug) {
echo ";;\n;";
$qobj->display();
}
}
/*
* Print and parse the PREREQUISITE or ANSWER section of the packet
*/
if ($this->debug) {
echo "\n";
$section = ($this->header->opcode == 'UPDATE') ? 'PREREQUISITE' :'ANSWER';
echo ";; $section SECTION (" .
$this->header->ancount . ' record' .
(($this->header->ancount == 1) ? '' : 's') .
")\n";
}
$this->answer = array();
for ($ctr = 0; $ctr < $this->header->ancount; $ctr++) {
list($rrobj, $offset) = $this->parse_rr($data, $offset);
if (is_null($rrobj)) {
return null;
}
array_push($this->answer, $rrobj);
if ($this->debug) {
$rrobj->display();
}
}
/*
* Print and parse the UPDATE or AUTHORITY section of the packet
*/
if ($this->debug) {
echo "\n";
$section = ($this->header->opcode == 'UPDATE') ? 'UPDATE' : 'AUTHORITY';
echo ";; $section SECTION (" .
$this->header->nscount . ' record' .
(($this->header->nscount == 1) ? '' : 's') .
")\n";
}
$this->authority = array();
for ($ctr = 0; $ctr < $this->header->nscount; $ctr++) {
list($rrobj, $offset) = $this->parse_rr($data, $offset);
if (is_null($rrobj)) {
return null;
}
array_push($this->authority, $rrobj);
if ($this->debug) {
$rrobj->display();
}
}
/*
* Print and parse the ADDITIONAL section of the packet
*/
if ($this->debug) {
echo "\n";
echo ';; ADDITIONAL SECTION (' .
$this->header->arcount . ' record' .
(($this->header->arcount == 1) ? '' : 's') .
")\n";
}
$this->additional = array();
for ($ctr = 0; $ctr < $this->header->arcount; $ctr++) {
list($rrobj, $offset) = $this->parse_rr($data, $offset);
if (is_null($rrobj)) {
return null;
}
array_push($this->additional, $rrobj);
if ($this->debug) {
$rrobj->display();
}
}
return true;
}
/* }}} */
/* Net_DNS_Packet::data() {{{*/
/**
* Build a packet from a Packet object hierarchy
*
* Builds a valid DNS packet suitable for sending to a DNS server or
* resolver client containing all of the data in the packet hierarchy.
*
* @return string A binary string containing a DNS Packet
*/
function data()
{
$data = $this->header->data();
for ($ctr = 0; $ctr < $this->header->qdcount; $ctr++) {
$data .= $this->question[$ctr]->data($this, strlen($data));
}
for ($ctr = 0; $ctr < $this->header->ancount; $ctr++) {
$data .= $this->answer[$ctr]->data($this, strlen($data));
}
for ($ctr = 0; $ctr < $this->header->nscount; $ctr++) {
$data .= $this->authority[$ctr]->data($this, strlen($data));
}
for ($ctr = 0; $ctr < $this->header->arcount; $ctr++) {
$data .= $this->additional[$ctr]->data($this, strlen($data));
}
return $data;
}
/*}}}*/
/* Net_DNS_Packet::dn_comp($name, $offset) {{{*/
/**
* DNS packet compression method
*
* Returns a domain name compressed for a particular packet object, to
* be stored beginning at the given offset within the packet data. The
* name will be added to a running list of compressed domain names for
* future use.
*
* @param string $name The name of the label to compress
* @param integer $offset The location offset in the packet to where
* the label will be stored.
* @return string $compname A binary string containing the compressed
* label.
* @see Net_DNS_Packet::dn_expand()
*/
function dn_comp($name, $offset)
{
$names = explode('.', $name);
$compname = '';
while (count($names)) {
$dname = join('.', $names);
if (isset($this->compnames[$dname])) {
$compname .= pack('n', 0xc000 | $this->compnames[$dname]);
break;
}
$this->compnames[$dname] = $offset;
$first = array_shift($names);
$length = strlen($first);
$compname .= pack('Ca*', $length, $first);
$offset += $length + 1;
}
if (! count($names)) {
$compname .= pack('C', 0);
}
return $compname;
}
/*}}}*/
/* Net_DNS_Packet::dn_expand($packet, $offset) {{{ */
/**
* DNS packet decompression method
*
* Expands the domain name stored at a particular location in a DNS
* packet. The first argument is a variable containing the packet
* data. The second argument is the offset within the packet where
* the (possibly) compressed domain name is stored.
*
* @param string $packet The packet data
* @param integer $offset The location offset in the packet of the
* label to decompress.
* @return array Returns a list of type array($name, $offset) where
* $name is the name of the label which was decompressed
* and $offset is the offset of the next field in the
* packet. Returns array(null, null) on error
*/
function dn_expand($packet, $offset)
{
$packetlen = strlen($packet);
$int16sz = 2;
$name = '';
while (1) {
if ($packetlen < ($offset + 1)) {
return array(null, null);
}
$a = unpack("@$offset/Cchar", $packet);
$len = $a['char'];
if ($len == 0) {
$offset++;
break;
} else if (($len & 0xc0) == 0xc0) {
if ($packetlen < ($offset + $int16sz)) {
return array(null, null);
}
$ptr = unpack("@$offset/ni", $packet);
$ptr = $ptr['i'];
$ptr = $ptr & 0x3fff;
$name2 = Net_DNS_Packet::dn_expand($packet, $ptr);
if (is_null($name2[0])) {
return array(null, null);
}
$name .= $name2[0];
$offset += $int16sz;
break;
} else {
$offset++;
if ($packetlen < ($offset + $len)) {
return array(null, null);
}
$elem = substr($packet, $offset, $len);
$name .= $elem . '.';
$offset += $len;
}
}
$name = ereg_replace('\.$', '', $name);
return array($name, $offset);
}
/*}}}*/
/* Net_DNS_Packet::label_extract($packet, $offset) {{{ */
/**
* DNS packet decompression method
*
* Extracts the label stored at a particular location in a DNS
* packet. The first argument is a variable containing the packet
* data. The second argument is the offset within the packet where
* the (possibly) compressed domain name is stored.
*
* @param string $packet The packet data
* @param integer $offset The location offset in the packet of the
* label to extract.
* @return array Returns a list of type array($name, $offset) where
* $name is the name of the label which was decompressed
* and $offset is the offset of the next field in the
* packet. Returns array(null, null) on error
*/
function label_extract($packet, $offset)
{
$packetlen = strlen($packet);
$name = '';
if ($packetlen < ($offset + 1)) {
return array(null, null);
}
$a = unpack("@$offset/Cchar", $packet);
$len = $a['char'];
$offset++;
if ($len + $offset > $packetlen) {
$name = substr($packet, $offset);
$offset = $packetlen;
} else {
$name = substr($packet, $offset, $len);
$offset += $len;
}
return array($name, $offset);
}
/*}}}*/
/* Net_DNS_Packet::parse_question($data, $offset) {{{ */
/**
* Parses the question section of a packet
*
* Examines a DNS packet at the specified offset and parses the data
* of the QUESTION section.
*
* @param string $data The packet data returned from the server
* @param integer $offset The location offset of the start of the
* question section.
* @return array An array of type array($q, $offset) where $q
* is a Net_DNS_Question object and $offset is the
* location of the next section of the packet which
* needs to be parsed.
*/
function parse_question($data, $offset)
{
list($qname, $offset) = $this->dn_expand($data, $offset);
if (is_null($qname)) {
return array(null, null);
}
if (strlen($data) < ($offset + 2 * 2)) {
return array(null, null);
}
$q = unpack("@$offset/n2int", $data);
$qtype = $q['int1'];
$qclass = $q['int2'];
$offset += 2 * 2;
$qtype = Net_DNS::typesbyval($qtype);
$qclass = Net_DNS::classesbyval($qclass);
$q = new Net_DNS_Question($qname, $qtype, $qclass);
return array($q, $offset);
}
/*}}}*/
/* Net_DNS_Packet::parse_rr($data, $offset) {{{ */
/**
* Parses a resource record section of a packet
*
* Examines a DNS packet at the specified offset and parses the data
* of a section which contains RRs (ANSWER, AUTHORITY, ADDITIONAL).
*
* @param string $data The packet data returned from the server
* @param integer $offset The location offset of the start of the resource
* record section.
* @return array An array of type array($rr, $offset) where $rr
* is a Net_DNS_RR object and $offset is the
* location of the next section of the packet which
* needs to be parsed.
*/
function parse_rr($data, $offset)
{
list($name, $offset) = $this->dn_expand($data, $offset);
if ($name === null) {
return array(null, null);
}
if (strlen($data) < ($offset + 10)) {
return array(null, null);
}
$a = unpack("@$offset/n2tc/Nttl/nrdlength", $data);
$type = $a['tc1'];
$class = $a['tc2'];
$ttl = $a['ttl'];
$rdlength = $a['rdlength'];
$type = Net_DNS::typesbyval($type);
$class = Net_DNS::classesbyval($class);
$offset += 10;
if (strlen($data) < ($offset + $rdlength)) {
return array(null, null);
}
$rrobj = &Net_DNS_RR::factory(array($name,
$type,
$class,
$ttl,
$rdlength,
$data,
$offset));
if (is_null($rrobj)) {
return array(null, null);
}
$offset += $rdlength;
return array($rrobj, $offset);
}
/* }}} */
/* Net_DNS_Packet::display() {{{ */
/**
* Prints out the packet in a human readable formatted string
*/
function display()
{
echo $this->string();
}
/*}}}*/
/* Net_DNS_Packet::string() {{{ */
/**
* Builds a human readable formatted string representing a packet
*/
function string()
{
$retval = '';
if ($this->answerfrom) {
$retval .= ';; Answer received from ' . $this->answerfrom . '(' .
$this->answersize . " bytes)\n;;\n";
}
$retval .= ";; HEADER SECTION\n";
$retval .= $this->header->string();
$retval .= "\n";
$section = ($this->header->opcode == 'UPDATE') ? 'ZONE' : 'QUESTION';
$retval .= ";; $section SECTION (" . $this->header->qdcount .
' record' . ($this->header->qdcount == 1 ? '' : 's') .
")\n";
foreach ($this->question as $qr) {
$retval .= ';; ' . $qr->string() . "\n";
}
$section = ($this->header->opcode == 'UPDATE') ? 'PREREQUISITE' : 'ANSWER';
$retval .= "\n;; $section SECTION (" . $this->header->ancount .
' record' . ($this->header->ancount == 1 ? '' : 's') .
")\n";
if (is_array($this->answer)) {
foreach ($this->answer as $ans) {
$retval .= ';; ' . $ans->string() . "\n";
}
}
$section = ($this->header->opcode == 'UPDATE') ? 'UPDATE' : 'AUTHORITY';
$retval .= "\n;; $section SECTION (" . $this->header->nscount .
' record' . ($this->header->nscount == 1 ? '' : 's') .
")\n";
if (is_array($this->authority)) {
foreach ($this->authority as $auth) {
$retval .= ';; ' . $auth->string() . "\n";
}
}
$retval .= "\n;; ADDITIONAL SECTION (" . $this->header->arcount .
' record' . ($this->header->arcount == 1 ? '' : 's') .
")\n";
if (is_array($this->additional)) {
foreach ($this->additional as $addl) {
$retval .= ';; ' . $addl->string() . "\n";
}
}
$retval .= "\n\n";
return $retval;
}
/*}}}*/
}
/* }}} */
/* VIM settings {{{
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* soft-stop-width: 4
* c indent on
* End:
* vim600: sw=4 ts=4 sts=4 cindent fdm=marker et
* vim<600: sw=4 ts=4
* }}} */
?>wget 'https://lists2.roe3.org/pmnl3/include/lib/Net/DNS/Question.php'<?php
/*
* License Information:
*
* Net_DNS: A resolver library for PHP
* Copyright (c) 2002-2003 Eric Kilfoil eric@ypass.net
*
* 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 (at your option) 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
*/
/* Net_DNS_Question object definition {{{ */
/**
* Builds or parses the QUESTION section of a DNS packet
*
* Builds or parses the QUESTION section of a DNS packet
*
* @package Net_DNS
*/
class Net_DNS_Question
{
/* class variable definitions {{{ */
var $qname = null;
var $qtype = null;
var $qclass = null;
/* }}} */
/* class constructor Net_DNS_Question($qname, $qtype, $qclass) {{{ */
function Net_DNS_Question($qname, $qtype, $qclass)
{
$qtype = !is_null($qtype) ? strtoupper($qtype) : 'ANY';
$qclass = !is_null($qclass) ? strtoupper($qclass) : 'ANY';
// Check if the caller has the type and class reversed.
// We are not that kind for unknown types.... :-)
if ( ( is_null(Net_DNS::typesbyname($qtype)) ||
is_null(Net_DNS::classesbyname($qtype)) )
&& !is_null(Net_DNS::classesbyname($qclass))
&& !is_null(Net_DNS::typesbyname($qclass)))
{
list($qtype, $qclass) = array($qclass, $qtype);
}
$qname = preg_replace(array('/^\.+/', '/\.+$/'), '', $qname);
$this->qname = $qname;
$this->qtype = $qtype;
$this->qclass = $qclass;
}
/* }}} */
/* Net_DNS_Question::display() {{{*/
function display()
{
echo $this->string() . "\n";
}
/*}}}*/
/* Net_DNS_Question::string() {{{*/
function string()
{
return $this->qname . ".\t" . $this->qclass . "\t" . $this->qtype;
}
/*}}}*/
/* Net_DNS_Question::data(&$packet, $offset) {{{*/
function data($packet, $offset)
{
$data = $packet->dn_comp($this->qname, $offset);
$data .= pack('n', Net_DNS::typesbyname(strtoupper($this->qtype)));
$data .= pack('n', Net_DNS::classesbyname(strtoupper($this->qclass)));
return $data;
}
/*}}}*/
}
/* }}} */
/* VIM settings{{{
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* soft-stop-width: 4
* c indent on
* End:
* vim600: sw=4 ts=4 sts=4 cindent fdm=marker et
* vim<600: sw=4 ts=4
* }}} */
?>wget 'https://lists2.roe3.org/pmnl3/include/lib/Net/DNS/RR.php'<?php
/*
* License Information:
*
* Net_DNS: A resolver library for PHP
* Copyright (c) 2002-2003 Eric Kilfoil eric@ypass.net
*
* 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 (at your option) 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
*/
/* Include files {{{ */
require_once("Net/DNS/RR/A.php");
require_once("Net/DNS/RR/AAAA.php");
require_once("Net/DNS/RR/NS.php");
require_once("Net/DNS/RR/CNAME.php");
require_once("Net/DNS/RR/PTR.php");
require_once("Net/DNS/RR/SOA.php");
require_once("Net/DNS/RR/MX.php");
require_once("Net/DNS/RR/TSIG.php");
require_once("Net/DNS/RR/TXT.php");
require_once("Net/DNS/RR/HINFO.php");
require_once("Net/DNS/RR/SRV.php");
require_once("Net/DNS/RR/NAPTR.php");
/* }}} */
/* Net_DNS_RR object definition {{{ */
/**
* Resource Record object definition
*
* Builds or parses resource record sections of the DNS packet including
* the answer, authority, and additional sections of the packet.
*
* @package Net_DNS
*/
class Net_DNS_RR
{
/* class variable definitions {{{ */
var $name;
var $type;
var $class;
var $ttl;
var $rdlength;
var $rdata;
/* }}} */
/*
* Use Net_DNS_RR::factory() instead
*
* @access private
*/
/* class constructor - Net_DNS_RR($rrdata) {{{ */
function Net_DNS_RR($rrdata)
{
if ($rrdata != 'getRR') { //BC check/warning remove later
trigger_error("Please use Net_DNS_RR::factory() instead");
}
}
/*
* Returns an RR object, use this instead of constructor
*
* @param mixed $rr_rdata Options as string, array or data
* @return object Net_DNS_RR or Net_DNS_RR_<type>
* @access public
* @see Net_DNS_RR::new_from_array Net_DNS_RR::new_from_data Net_DNS_RR::new_from_string
*/
function &factory($rrdata, $update_type = '')
{
if (is_string($rrdata)) {
$rr = &Net_DNS_RR::new_from_string($rrdata, $update_type);
} elseif (count($rrdata) == 7) {
list($name, $rrtype, $rrclass, $ttl, $rdlength, $data, $offset) = $rrdata;
$rr = &Net_DNS_RR::new_from_data($name, $rrtype, $rrclass, $ttl, $rdlength, $data, $offset);
} else {
$rr = &Net_DNS_RR::new_from_array($rrdata);
}
return $rr;
}
/* }}} */
/* Net_DNS_RR::new_from_data($name, $ttl, $rrtype, $rrclass, $rdlength, $data, $offset) {{{ */
function &new_from_data($name, $rrtype, $rrclass, $ttl, $rdlength, $data, $offset)
{
$rr = &new Net_DNS_RR('getRR');
$rr->name = $name;
$rr->type = $rrtype;
$rr->class = $rrclass;
$rr->ttl = $ttl;
$rr->rdlength = $rdlength;
$rr->rdata = substr($data, $offset, $rdlength);
if (class_exists('Net_DNS_RR_' . $rrtype)) {
$scn = 'Net_DNS_RR_' . $rrtype;
$rr = new $scn($rr, $data, $offset);
}
return $rr;
}
/* }}} */
/* Net_DNS_RR::new_from_string($rrstring, $update_type = '') {{{ */
function &new_from_string($rrstring, $update_type = '')
{
$rr = &new Net_DNS_RR('getRR');
$ttl = 0;
$parts = preg_split('/[\s]+/', $rrstring);
while (count($parts) > 0) {
$s = array_shift($parts);
if (!isset($name)) {
$name = ereg_replace('\.+$', '', $s);
} else if (preg_match('/^\d+$/', $s)) {
$ttl = $s;
} else if (!isset($rrclass) && ! is_null(Net_DNS::classesbyname(strtoupper($s)))) {
$rrclass = strtoupper($s);
$rdata = join(' ', $parts);
} else if (! is_null(Net_DNS::typesbyname(strtoupper($s)))) {
$rrtype = strtoupper($s);
$rdata = join(' ', $parts);
break;
} else {
break;
}
}
/*
* Do we need to do this?
*/
$rdata = trim(chop($rdata));
if (! strlen($rrtype) && strlen($rrclass) && $rrclass == 'ANY') {
$rrtype = $rrclass;
$rrclass = 'IN';
} else if (! isset($rrclass)) {
$rrclass = 'IN';
}
if (! strlen($rrtype)) {
$rrtype = 'ANY';
}
if (strlen($update_type)) {
$update_type = strtolower($update_type);
if ($update_type == 'yxrrset') {
$ttl = 0;
if (! strlen($rdata)) {
$rrclass = 'ANY';
}
} else if ($update_type == 'nxrrset') {
$ttl = 0;
$rrclass = 'NONE';
$rdata = '';
} else if ($update_type == 'yxdomain') {
$ttl = 0;
$rrclass = 'ANY';
$rrtype = 'ANY';
$rdata = '';
} else if ($update_type == 'nxdomain') {
$ttl = 0;
$rrclass = 'NONE';
$rrtype = 'ANY';
$rdata = '';
} else if (preg_match('/^(rr_)?add$/', $update_type)) {
$update_type = 'add';
if (! $ttl) {
$ttl = 86400;
}
} else if (preg_match('/^(rr_)?del(ete)?$/', $update_type)) {
$update_type = 'del';
$ttl = 0;
$rrclass = $rdata ? 'NONE' : 'ANY';
}
}
if (strlen($rrtype)) {
$rr->name = $name;
$rr->type = $rrtype;
$rr->class = $rrclass;
$rr->ttl = $ttl;
$rr->rdlength = 0;
$rr->rdata = '';
if (class_exists('Net_DNS_RR_' . $rrtype)) {
$scn = 'Net_DNS_RR_' . $rrtype;
return new $scn($rr, $rdata);
} else {
return $rr;
}
} else {
return null;
}
}
/* }}} */
/* Net_DNS_RR::new_from_array($rrarray) {{{ */
function &new_from_array($rrarray)
{
$rr = &new Net_DNS_RR('getRR');
foreach ($rrarray as $k => $v) {
$rr->{strtolower($k)} = $v;
}
if (! strlen($rr->name)) {
return null;
}
if (! strlen($rr->type)){
return null;
}
if (! $rr->ttl) {
$rr->ttl = 0;
}
if (! strlen($rr->class)) {
$rr->class = 'IN';
}
if (strlen($rr->rdata)) {
$rr->rdlength = strlen($rr->rdata);
}
if (class_exists('Net_DNS_RR_' . $rr->rrtype)) {
$scn = 'Net_DNS_RR_' . $rr->rrtype;
return new $scn($rr, $rr->rdata);
} else {
return $rr;
}
}
/* }}} */
/* Net_DNS_RR::display() {{{ */
function display()
{
echo $this->string() . "\n";
}
/* }}} */
/* Net_DNS_RR::string() {{{ */
function string()
{
return $this->name . ".\t" . (strlen($this->name) < 16 ? "\t" : '') .
$this->ttl . "\t" .
$this->class. "\t" .
$this->type . "\t" .
$this->rdatastr();
}
/* }}} */
/* Net_DNS_RR::rdatastr() {{{ */
function rdatastr()
{
if ($this->rdlength) {
return '; rdlength = ' . $this->rdlength;
}
return '; no data';
}
/* }}} */
/* Net_DNS_RR::rdata() {{{ */
function rdata(&$packetORrdata, $offset = '')
{
if ($offset) {
return $this->rr_rdata($packetORrdata, $offset);
} else if (strlen($this->rdata)) {
return $this->rdata;
} else {
return null;
}
}
/* }}} */
/* Net_DNS_RR::rr_rdata($packet, $offset) {{{ */
function rr_rdata(&$packet, $offset)
{
return (strlen($this->rdata) ? $this->rdata : '');
}
/* }}} */
/* Net_DNS_RR::data() {{{ */
function data(&$packet, $offset)
{
$data = $packet->dn_comp($this->name, $offset);
$data .= pack('n', Net_DNS::typesbyname(strtoupper($this->type)));
$data .= pack('n', Net_DNS::classesbyname(strtoupper($this->class)));
$data .= pack('N', $this->ttl);
$offset += strlen($data) + 2; // The 2 extra bytes are for rdlength
$rdata = $this->rdata($packet, $offset);
$data .= pack('n', strlen($rdata));
$data .= $rdata;
return $data;
}
/* }}} */
}
/* }}} */
/* VIM settings {{{
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* soft-stop-width: 4
* c indent on
* End:
* vim600: sw=4 ts=4 sts=4 cindent fdm=marker et
* vim<600: sw=4 ts=4
* }}} */
?>wget 'https://lists2.roe3.org/pmnl3/include/lib/Net/DNS/Resolver.php'<?php
/*
* License Information:
*
* Net_DNS: A resolver library for PHP
* Copyright (c) 2002-2003 Eric Kilfoil eric@ypass.net
*
* 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 (at your option) 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
*/
/* Net_DNS_Resolver object definition {{{ */
/**
* A DNS Resolver library
*
* Resolver library. Builds a DNS query packet, sends the packet to the
* server and parses the reponse.
*
* @package Net_DNS
*/
class Net_DNS_Resolver
{
/* class variable definitions {{{ */
/**
* An array of all nameservers to query
*
* @var array $nameservers
* @access public
*/
var $nameservers;
/**
* The UDP port to use for the query (default = 53)
*
* @var integer $port
* @access public
*/
var $port;
/**
* The domain in which the resolver client host resides.
*
* @var string $domain
* @access public
*/
var $domain;
/**
* The searchlist to apply to unqualified hosts
*
* An array of strings containg domains to apply to unqualified hosts
* passed to the resolver.
*
* @var array $searchlist
* @access public
*/
var $searchlist;
/**
* The number of seconds between retransmission of unaswered queries
*
* @var integer $retrans
* @access public
*/
var $retrans;
/**
* The number of times unanswered requests should be retried
*
* @var integer $retry
* @access public
*/
var $retry;
/**
* Whether or not to use TCP (Virtual Circuits) instead of UDP
*
* If set to 0, UDP will be used unless TCP is required. TCP is
* required for questions or responses greater than 512 bytes.
*
* @var boolean $usevc
* @access public
*/
var $usevc;
/**
* Unknown
*/
var $stayopen;
/**
* Ignore TC (truncated) bit
*
* If the server responds with the TC bit set on a response, and $igntc
* is set to 0, the resolver will automatically retransmit the request
* using virtual circuits (TCP).
*
* @access public
* @var boolean $igntc
*/
var $igntc;
/**
* Recursion Desired
*
* Sets the value of the RD (recursion desired) bit in the header. If
* the RD bit is set to 0, the server will not perform recursion on the
* request.
*
* @var boolean $recurse
* @access public
*/
var $recurse;
/**
* Unknown
*/
var $defnames;
/**
* Unknown
*/
var $dnsrch;
/**
* Contains the value of the last error returned by the resolver.
*
* @var string $errorstring
* @access public
*/
var $errorstring;
/**
* The origin of the packet.
*
* This contains a string containing the IP address of the name server
* from which the answer was given.
*
* @var string $answerfrom
* @access public
*/
var $answerfrom;
/**
* The size of the answer packet.
*
* This contains a integer containing the size of the DNS packet the
* server responded with.
*
* @var string $answersize
* @access public
*/
var $answersize;
/**
* The number of seconds after which a TCP connection should timeout
*
* @var integer $tcp_timeout
* @access public
*/
var $tcp_timeout;
/**
* The location of the system resolv.conf file.
*
* @var string $resolv_conf
*/
var $resolv_conf = '/etc/resolv.conf';
/**
* The name of the user defined resolv.conf
*
* The resolver will attempt to look in both the current directory as
* well as the user's home directory for a user defined resolver
* configuration file
*
* @var string $dotfile
* @see Net_DNS_Resolver::$confpath
*/
var $dotfile = '.resolv.conf';
/**
* A array of directories to search for the user's resolver config
*
* @var string $confpath
* @see Net_DNS_Resolver::$dotfile
*/
var $confpath;
/**
* debugging flag
*
* If set to true (non-zero), debugging code will be displayed as the
* resolver makes the request.
*
* @var boolean $debug;
* @access public
*/
var $debug;
/**
* use the (currently) experimental PHP socket library
*
* If set to true (non-zero), the Resolver will attempt to use the
* much more effecient PHP sockets extension (if available).
*
* @var boolean $useEnhancedSockets;
* @access public
*/
var $useEnhancedSockets = true;
/**
* An array of sockets connected to a name servers
*
* @var array $sockets
* @access private
*/
var $sockets;
/**
* axfr tcp socket
*
* Used to store a PHP socket resource for a connection to a server
*
* @var resource $_axfr_sock;
* @access private
*/
var $_axfr_sock;
/**
* axfr resource record list
*
* Used to store a resource record list from a zone transfer
*
* @var resource $_axfr_rr;
* @access private
*/
var $_axfr_rr;
/**
* axfr soa count
*
* Used to store the number of soa records received from a zone transfer
*
* @var resource $_axfr_soa_count;
* @access private
*/
var $_axfr_soa_count;
/* }}} */
/* class constructor - Net_DNS_Resolver() {{{ */
/**
* Initializes the Resolver Object
*
* @return Net_DNS_Resolver
*/
function Net_DNS_Resolver($defaults = array())
{
$mydefaults = array(
'nameservers' => array(),
'port' => '53',
'domain' => '',
'searchlist' => array(),
'retrans' => 5,
'retry' => 4,
'usevc' => 0,
'stayopen' => 0,
'igntc' => 0,
'recurse' => 1,
'defnames' => 1,
'dnsrch' => 1,
'debug' => 0,
'errorstring' => 'unknown error or no error',
'answerfrom' => '',
'answersize' => 0,
'tcp_timeout' => 120
);
foreach ($mydefaults as $k => $v) {
$this->{$k} = isset($defaults[$k]) ? $defaults[$k] : $v;
}
$this->confpath[0] = getenv('HOME');
$this->confpath[1] = '.';
$this->res_init();
}
/* }}} */
/* Net_DNS_Resolver::res_init() {{{ */
/**
* Initalizes the resolver library
*
* res_init() searches for resolver library configuration files and
* initializes the various properties of the resolver object.
*
* @see Net_DNS_Resolver::$resolv_conf, Net_DNS_Resolver::$dotfile,
* Net_DNS_Resolver::$confpath, Net_DNS_Resolver::$searchlist,
* Net_DNS_Resolver::$domain, Net_DNS_Resolver::$nameservers
* @access public
*/
function res_init()
{
$err = error_reporting(0);
if (file_exists($this->resolv_conf) && is_readable($this->resolv_conf)) {
$this->read_config($this->resolv_conf);
}
foreach ($this->confpath as $dir) {
$file = $dir.DIRECTORY_SEPARATOR.$this->dotfile;
if (file_exists($file) && is_readable($file)) {
$this->read_config($file);
}
}
$this->read_env();
if (!strlen($this->domain) && sizeof($this->searchlist)) {
$this->domain = $this->searchlist[0];
} else if (! sizeof($this->searchlist) && strlen($this->domain)) {
$this->searchlist = array($this->domain);
}
error_reporting($err);
}
/* }}} */
/* Net_DNS_Resolver::read_config {{{ */
/**
* Reads and parses a resolver configuration file
*
* @param string $file The name of the file to open and parse
*/
function read_config($file)
{
if (is_readable($file)) {
if (! ($f = fopen($file, 'r'))) {
$this->error = "can't open $file";
}
}
if (!is_resource($f)) {
$this->error = "can't open $file";
} else {
while (! feof($f)) {
$line = chop(fgets($f, 10240));
$line = ereg_replace('(.*)[;#].*', '\\1', $line);
if (ereg("^[ \t]*$", $line, $regs)) {
continue;
}
ereg("^[ \t]*([^ \t]+)[ \t]+([^ \t]+)", $line, $regs);
$option = $regs[1];
$value = $regs[2];
switch ($option) {
case 'domain':
$this->domain = $regs[2];
break;
case 'search':
$this->searchlist[count($this->searchlist)] = $regs[2];
break;
case 'nameserver':
foreach (split(' ', $regs[2]) as $ns) {
$this->nameservers[count($this->nameservers)] = $ns;
}
break;
}
}
fclose($f);
}
}
/* }}} */
/* Net_DNS_Resolver::read_env() {{{ */
/**
* Examines the environment for resolver config information
*/
function read_env()
{
if (getenv('RES_NAMESERVERS')) {
$this->nameservers = split(' ', getenv('RES_NAMESERVERS'));
}
if (getenv('RES_SEARCHLIST')) {
$this->searchlist = split(' ', getenv('RES_SEARCHLIST'));
}
if (getenv('LOCALDOMAIN')) {
$this->domain = getenv('LOCALDOMAIN');
}
if (getenv('RES_OPTIONS')) {
$env = split(' ', getenv('RES_OPTIONS'));
foreach ($env as $opt) {
list($name, $val) = split(':', $opt);
if ($val == '') {
$val = 1;
}
$this->{$name} = $val;
}
}
}
/* }}} */
/* Net_DNS_Resolver::string() {{{ */
/**
* Builds a string containing the current state of the resolver
*
* Builds formatted string containing the state of the resolver library suited
* for display.
*
* @access public
*/
function string()
{
$state = ";; Net_DNS_Resolver state:\n";
$state .= ';; domain = ' . $this->domain . "\n";
$state .= ';; searchlist = ' . implode(' ', $this->searchlist) . "\n";
$state .= ';; nameservers = ' . implode(' ', $this->nameservers) . "\n";
$state .= ';; port = ' . $this->port . "\n";
$state .= ';; tcp_timeout = ';
$state .= ($this->tcp_timeout ? $this->tcp_timeout : 'indefinite') . "\n";
$state .= ';; retrans = ' . $this->retrans . ' ';
$state .= 'retry = ' . $this->retry . "\n";
$state .= ';; usevc = ' . $this->usevc . ' ';
$state .= 'stayopen = ' . $this->stayopen . ' ';
$state .= 'igntc = ' . $this->igntc . "\n";
$state .= ';; defnames = ' . $this->defnames . ' ';
$state .= 'dnsrch = ' . $this->dnsrch . "\n";
$state .= ';; recurse = ' . $this->recurse . ' ';
$state .= 'debug = ' . $this->debug . "\n";
return $state;
}
/* }}} */
/* Net_DNS_Resolver::nextid() {{{ */
/**
* Returns the next request Id to be used for the DNS packet header
*/
function nextid()
{
if ($GLOBALS['_Net_DNS_packet_id']++ > 65535) {
$GLOBALS['_Net_DNS_packet_id']= 1;
}
return $GLOBALS['_Net_DNS_packet_id'];
}
/* }}} */
/* Net_DNS_Resolver::nameservers() {{{ */
/**
* Gets or sets the nameservers to be queried.
*
* Returns the current nameservers if an array of new nameservers is not
* given as the argument OR sets the nameservers to the given nameservers.
*
* Nameservers not specified by ip address must be able to be resolved by
* the default settings of a new Net_DNS_Resolver.
*
* @access public
*/
function nameservers($nsa = array())
{
$defres = new Net_DNS_Resolver();
if (is_array($nsa)) {
$a = array();
foreach ($nsa as $ns) {
if (preg_match('/^(\d+(:?\.\d+){0,3})$/', $ns)) {
$a[] = ($ns == 0) ? '0.0.0.0' : $ns;
} else {
$names = array();
if (!preg_match('/\./', $ns)) {
if (!empty($defres->searchlist)) {
foreach ($defres->searchlist as $suffix) {
$names[] = $ns .'.' . $suffix;
}
} elseif (!empty($defres->domain)) {
$names[] = $ns .'.'. $defres->domain;
}
} else {
$names[] = $ns;
}
$packet = $defres->search($ns);
if (is_object($packet)) {
$addresses = $this->cname_addr($names, $packet);
foreach ($addresses as $b) {
$a[] = $b;
}
$a = array_unique($a);
}
}
}
if (count($a)) {
$this->nameservers = $a;
}
}
return $this->nameservers;
}
/* }}} */
/* not tested -- Net_DNS_Resolver::cname_addr() {{{ */
function cname_addr($names, $packet)
{
$addr = array();
//my $oct2 = '(?:2[0-4]\d|25[0-5]|[0-1]?\d\d|\d)';
foreach ($packet->answer as $rr) {
if (in_array($rr->name, $names)) {
if ($rr->type == 'CNAME') {
$names[] = $rr->cname;
} elseif ($rr->type == 'A') {
// Run a basic taint check.
//next RR unless $rr->address =~ m/^($oct2\.$oct2\.$oct2\.$oct2)$/o;
$addr[] = $rr->address;
}
}
}
return $addr;
}
/* }}} */
/* Net_DNS_Resolver::search() {{{ */
/**
* Searches nameservers for an answer
*
* Goes through the search list and attempts to resolve name based on
* the information in the search list.
*
* @param string $name The name (LHS) of a resource record to query.
* @param string $type The type of record to query.
* @param string $class The class of record to query.
* @return mixed an object of type Net_DNS_Packet on success,
* or false on failure.
* @see Net_DNS::typesbyname(), Net_DNS::classesbyname()
* @access public
*/
function search($name, $type = 'A', $class = 'IN')
{
/*
* If the name looks like an IP address then do an appropriate
* PTR query.
*/
if (preg_match('/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/', $name, $regs)) {
$name = $regs[4].'.'.$regs[3].'.'.$regs[2].'.'.$regs[1].'.in-addr.arpa.';
$type = 'PTR';
}
/*
* If the name contains at least one dot then try it as is first.
*/
if (strstr($name, '.')) {
if ($this->debug) {
echo ";; search($name, $type, $class)\n";
}
$ans = $this->query($name, $type, $class);
if (is_object($ans) && ($ans->header->ancount > 0)) {
return $ans;
}
}
/*
* If the name does not end in a dot then apply the search list.
*/
$domain = '';
if ((! preg_match('/\.$/', $name)) && $this->dnsrch) {
foreach ($this->searchlist as $domain) {
$newname = "$name.$domain";
if ($this->debug) {
echo ";; search($newname, $type, $class)\n";
}
$ans = $this->query($newname, $type, $class);
if (is_object($ans) && ($ans->header->ancount > 0)) {
return $ans;
}
}
}
/*
* Finally, if the name has no dots then try it as is.
*/
if (strpos($name, '.') === false) {
if ($this->debug) {
echo ";; search($name, $type, $class)\n";
}
$ans = $this->query($name.'.', $type, $class);
if (is_object($ans) && ($ans->header->ancount > 0)) {
return $ans;
}
}
/*
* No answer was found.
*/
return false;
}
/* }}} */
/* Net_DNS_Resolver::rawQuery() {{{ */
/**
* Queries nameservers for an answer
*
* Queries the nameservers listed in the resolver configuration for an
* answer to a question packet.
*
* @param string $name The name (LHS) of a resource record to query.
* @param string $type The type of record to query.
* @param string $class The class of record to query.
* @return mixed an object of type Net_DNS_Packet, regardless of whether the packet
* has an answer or not
* @see Net_DNS::typesbyname(), Net_DNS::classesbyname()
* @access public
*/
function rawQuery($name, $type = 'A', $class = 'IN')
{
/*
* If the name does not contain any dots then append the default domain.
*/
if ((strchr($name, '.') < 0) && $this->defnames) {
$name .= '.' . $this->domain;
}
/*
* If the name looks like an IP address then do an appropriate
* PTR query.
*/
if (preg_match('/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/', $name, $regs)) {
$name = $regs[4].'.'.$regs[3].'.'.$regs[2].'.'.$regs[1].'.in-addr.arpa.';
$type = 'PTR';
}
if ($this->debug) {
echo ";; query($name, $type, $class)\n";
}
$packet = new Net_DNS_Packet($this->debug);
$packet->buildQuestion($name, $type, $class);
$packet->header->rd = $this->recurse;
$ans = $this->send($packet);
return $ans;
}
/* }}} */
/* Net_DNS_Resolver::query() {{{ */
/**
* Queries nameservers for an answer
*
* Queries the nameservers listed in the resolver configuration for an
* answer to a question packet.
*
* @param string $name The name (LHS) of a resource record to query.
* @param string $type The type of record to query.
* @param string $class The class of record to query.
* @return mixed an object of type Net_DNS_Packet on success,
* or false on failure.
* @see Net_DNS::typesbyname(), Net_DNS::classesbyname()
* @access public
*/
function query($name, $type = 'A', $class = 'IN')
{
$ans = $this->rawQuery($name, $type, $class);
if (is_object($ans) && $ans->header->ancount > 0) {
return $ans;
}
return false;
}
/* }}} */
/* Net_DNS_Resolver::send($packetORname, $qtype = '', $qclass = '') {{{ */
/**
* Sends a packet to a nameserver
*
* Determines the appropriate communication method (UDP or TCP) and
* sends a DNS packet to a nameserver. Use of the this function
* directly is discouraged. $packetORname should always be a properly
* formatted binary DNS packet. However, it is possible to send a
* query here and bypass Net_DNS_Resolver::query()
*
* @param string $packetORname A binary DNS packet stream or a
* hostname to query
* @param string $qtype This should not be used
* @param string $qclass This should not be used
* @return object Net_DNS_Packet An answer packet object
*/
function send($packetORname, $qtype = '', $qclass = '')
{
$packet = $this->make_query_packet($packetORname, $qtype, $qclass);
$packet_data = $packet->data();
if ($this->usevc != 0 || strlen($packet_data > 512)) {
$ans = $this->send_tcp($packet, $packet_data);
} else {
$ans = $this->send_udp($packet, $packet_data);
if ($ans && $ans->header->tc && $this->igntc != 0) {
if ($this->debug) {
echo ";;\n;; packet truncated: retrying using TCP\n";
}
$ans = $this->send_tcp($packet, $packet_data);
}
}
return $ans;
}
/* }}} */
/* Net_DNS_Resolver::printhex($packet_data) {{{ */
/**
* Prints packet data as hex code.
*/
function printhex($data)
{
$data = ' ' . $data;
$start = 0;
while ($start < strlen($data)) {
printf(';; %03d: ', $start);
for ($ctr = $start; $ctr < $start+16; $ctr++) {
if ($ctr < strlen($data)) {
printf('%02x ', ord($data[$ctr]));
} else {
echo ' ';
}
}
echo ' ';
for ($ctr = $start; $ctr < $start+16; $ctr++) {
if (ord($data[$ctr]) < 32 || ord($data[$ctr]) > 127) {
echo '.';
} else {
echo $data[$ctr];
}
}
echo "\n";
$start += 16;
}
}
/* }}} */
/* Net_DNS_Resolver::send_tcp($packet, $packet_data) {{{ */
/**
* Sends a packet via TCP to the list of name servers.
*
* @param string $packet A packet object to send to the NS list
* @param string $packet_data The data in the packet as returned by
* the Net_DNS_Packet::data() method
* @return object Net_DNS_Packet Returns an answer packet object
* @see Net_DNS_Resolver::send_udp(), Net_DNS_Resolver::send()
*/
function send_tcp($packet, $packet_data)
{
if (! count($this->nameservers)) {
$this->errorstring = 'no nameservers';
if ($this->debug) {
echo ";; ERROR: send_tcp: no nameservers\n";
}
return null;
}
$timeout = $this->tcp_timeout;
foreach ($this->nameservers as $ns) {
$dstport = $this->port;
if ($this->debug) {
echo ";; send_tcp($ns:$dstport)\n";
}
$sock_key = "$ns:$dstport";
if (isset($this->sockets[$sock_key]) && is_resource($this->sockets[$sock_key])) {
$sock = &$this->sockets[$sock_key];
} else {
if (! ($sock = @fsockopen($ns, $dstport, $errno,
$errstr, $timeout))) {
$this->errorstring = 'connection failed';
if ($this->debug) {
echo ";; ERROR: send_tcp: connection failed: $errstr\n";
}
continue;
}
$this->sockets[$sock_key] = $sock;
unset($sock);
$sock = &$this->sockets[$sock_key];
}
$lenmsg = pack('n', strlen($packet_data));
if ($this->debug) {
echo ';; sending ' . strlen($packet_data) . " bytes\n";
}
if (($sent = fwrite($sock, $lenmsg)) == -1) {
$this->errorstring = 'length send failed';
if ($this->debug) {
echo ";; ERROR: send_tcp: length send failed\n";
}
continue;
}
if (($sent = fwrite($sock, $packet_data)) == -1) {
$this->errorstring = 'packet send failed';
if ($this->debug) {
echo ";; ERROR: send_tcp: packet data send failed\n";
}
}
socket_set_timeout($sock, $timeout);
$buf = fread($sock, 2);
$e = socket_get_status($sock);
/* If $buf is empty, we want to supress errors
long enough to reach the continue; down the line */
$len = @unpack('nint', $buf);
$len = @$len['int'];
if (!$len) {
continue;
}
$buf = fread($sock, $len);
$actual = strlen($buf);
$this->answerfrom = $ns;
$this->answersize = $len;
if ($this->debug) {
echo ";; received $actual bytes\n";
}
if ($actual != $len) {
$this->errorstring = "expected $len bytes, received $buf";
if ($this->debug) {
echo ';; send_tcp: ' . $this->errorstring;
}
continue;
}
$ans = new Net_DNS_Packet($this->debug);
if (is_null($ans->parse($buf))) {
continue;
}
$this->errorstring = $ans->header->rcode;
$ans->answerfrom = $this->answerfrom;
$ans->answersize = $this->answersize;
return $ans;
}
}
/* }}} */
/* Net_DNS_Resolver::send_udp_no_sock_lib($packet, $packet_data) {{{ */
/**
* Sends a packet via UDP to the list of name servers.
*
* This function sends a packet to a nameserver. It is called by
* send_udp if the sockets PHP extension is not compiled into PHP.
*
* @param string $packet A packet object to send to the NS list
* @param string $packet_data The data in the packet as returned by
* the Net_DNS_Packet::data() method
* @return object Net_DNS_Packet Returns an answer packet object
* @see Net_DNS_Resolver::send_tcp(), Net_DNS_Resolver::send(),
* Net_DNS_Resolver::send_udp(), Net_DNS_Resolver::send_udp_with_sock_lib()
*/
function send_udp_no_sock_lib($packet, $packet_data)
{
$retrans = $this->retrans;
$timeout = $retrans;
/*
* PHP doesn't have excellent socket support as of this writing.
* This needs to be rewritten when PHP POSIX socket support is
* complete.
* Obviously, this code is MUCH different than the PERL implementation
*/
$w = error_reporting(0);
$ctr = 0;
// Create a socket handle for each nameserver
foreach ($this->nameservers as $nameserver) {
if ($sock[$ctr++] = fsockopen("udp://$nameserver", $this->port)) {
$peerhost[$ctr-1] = $nameserver;
$peerport[$ctr-1] = $this->port;
socket_set_blocking($sock[$ctr-1], false);
} else {
$ctr--;
}
}
error_reporting($w);
if ($ctr == 0) {
$this->errorstring = 'no nameservers';
return null;
}
for ($i = 0; $i < $this->retry; $i++, $retrans *= 2,
$timeout = (int) ($retrans / $ctr)) {
if ($timeout < 1) {
$timeout = 1;
}
foreach ($sock as $k => $s) {
if ($this->debug) {
echo ';; send_udp(' . $peerhost[$k] . ':' . $peerport[$k] . '): sending ' . strlen($packet_data) . " bytes\n";
}
if (! fwrite($s, $packet_data)) {
if ($this->debug) {
echo ";; send error\n";
}
}
/*
* Here's where it get's really nasty. We don't have a select()
* function here, so we have to poll for a response... UGH!
*/
$timetoTO = time() + (double)microtime() + $timeout;
/*
* let's sleep for a few hundred microseconds to let the
* data come in from the network...
*/
usleep(500);
$buf = '';
while (! strlen($buf) && $timetoTO > (time() +
(double)microtime())) {
socket_set_blocking($s, false);
if ($buf = fread($s, 512)) {
$this->answerfrom = $peerhost[$k];
$this->answersize = strlen($buf);
if ($this->debug) {
echo ';; answer from ' . $peerhost[$k] . ':' .
$peerport[$k] . ': ' . strlen($buf) . " bytes\n";
}
$ans = new Net_DNS_Packet($this->debug);
if ($ans->parse($buf)) {
if ($ans->header->qr != '1') {
continue;
}
if ($ans->header->id != $packet->header->id) {
continue;
}
$this->errorstring = $ans->header->rcode;
$ans->answerfrom = $this->answerfrom;
$ans->answersize = $this->answersize;
return $ans;
}
}
// Sleep another 1/100th of a second... this sucks...
usleep(1000);
}
}
$this->errorstring = 'query timed out';
return null;
}
}
/* }}} */
/* Net_DNS_Resolver::send_udp_with_sock_lib($packet, $packet_data) {{{ */
/**
* Sends a packet via UDP to the list of name servers.
*
* This function sends a packet to a nameserver. It is called by
* send_udp if the sockets PHP extension is compiled into PHP.
*
* @param string $packet A packet object to send to the NS list
* @param string $packet_data The data in the packet as returned by
* the Net_DNS_Packet::data() method
* @return object Net_DNS_Packet Returns an answer packet object
* @see Net_DNS_Resolver::send_tcp(), Net_DNS_Resolver::send(),
* Net_DNS_Resolver::send_udp(), Net_DNS_Resolver::send_udp_no_sock_lib()
*/
function send_udp_with_sock_lib($packet, $packet_data)
{
$retrans = $this->retrans;
$timeout = $retrans;
//$w = error_reporting(0);
$ctr = 0;
// Create a socket handle for each nameserver
foreach ($this->nameservers as $nameserver) {
if ((($sock[$ctr++] = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP))) &&
socket_connect($sock[$ctr-1], $nameserver, $this->port))
{
$peerhost[$ctr-1] = $nameserver;
$peerport[$ctr-1] = $this->port;
socket_set_nonblock($sock[$ctr-1]);
} else {
$ctr--;
}
}
//error_reporting($w);
if ($ctr == 0) {
$this->errorstring = 'no nameservers';
return null;
}
// Try each nameserver up to $this->retry times
for ($i = 0; $i < $this->retry; $i++) {
if ($i != 0) {
// Set the timeout for each retry based on the number of
// nameservers there is a connected socket for.
$retrans *= 2;
$timeout = (int) ($retrans / $ctr);
}
// Make sure the timeout is at least 1 second
if ($timeout < 1) {
$timeout = 1;
}
// Try each nameserver
foreach ($sock as $k => $s) {
if ($this->debug) {
echo "\n;; send_udp(" . $peerhost[$k] . ':' . $peerport[$k] . '): sending ' . strlen($packet_data) . " bytes\n";
}
if (! socket_write($s, $packet_data)) {
if ($this->debug) {
echo ";; send error\n";
}
}
$set = array($s);
if ($this->debug) {
echo ";; timeout set to $timeout seconds\n";
}
$changed = socket_select($set, $w = null, $e = null, $timeout);
if ($changed) {
// Test to see if the connection was refused. Linux servers will send
// an ICMP message which will cause the client's next system call to
// return ECONNREFUSED if the server is not listening on the ip:port queried
if (socket_get_option($s, SOL_SOCKET, SO_ERROR) == SOCKET_ECONNREFUSED) {
// Unix socket connection was refused
if ($this->debug) {
echo ';; connection to ' . $peerhost[$k] . ':' . $peerport[$k] . " was refused\n";
}
// Try the next server.
continue;
}
// Read the response
$buf = @socket_read($s, 512);
if ($buf === false) {
// No data could be read from socket
if ($this->debug) {
echo ';; no data could be read from ' . $peerhost[$k] . ':' . $peerport[$k] . "\n";
echo ';; socket_error: ' . socket_strerror(socket_last_error()) . "\n";
}
// Reset the non-specific socket error status
socket_clear_error();
// Try the next server.
continue;
}
$this->answerfrom = $peerhost[$k];
$this->answersize = strlen($buf);
if ($this->debug) {
echo ';; answer from ' . $peerhost[$k] . ':' .
$peerport[$k] . ': ' . strlen($buf) . " bytes\n";
}
$ans = new Net_DNS_Packet($this->debug);
if ($ans->parse($buf)) {
if ($ans->header->qr != '1') {
// Ignore packet if it is not a response
continue;
} elseif ($ans->header->id != $packet->header->id) {
// Ignore packet if the response id does not match the query id
continue;
} else {
// Return the DNS response packet
$this->errorstring = $ans->header->rcode;
$ans->answerfrom = $this->answerfrom;
$ans->answersize = $this->answersize;
return $ans;
}
}
} elseif ($this->debug) {
echo ";; query to ". $peerhost[$k] . ':' . $peerport[$k] . " timed out\n";
}
}
}
$this->errorstring = 'query timed out';
return null;
}
/* }}} */
/* Net_DNS_Resolver::send_udp($packet, $packet_data) {{{ */
/**
* Sends a packet via UDP to the list of name servers.
*
* This function sends a packet to a nameserver. send_udp calls
* either Net_DNS_Resolver::send_udp_no_sock_lib() or
* Net_DNS_Resolver::send_udp_with_sock_lib() depending on whether or
* not the sockets extension is compiled into PHP. Note that using the
* sockets extension is MUCH more efficient.
*
* @param object Net_DNS_Packet $packet A packet object to send to the NS list
* @param string $packet_data The data in the packet as returned by
* the Net_DNS_Packet::data() method
* @return object Net_DNS_Packet Returns an answer packet object
* @see Net_DNS_Resolver::send_tcp(), Net_DNS_Resolver::send(),
* Net_DNS_Resolver::send_udp(), Net_DNS_Resolver::send_udp_no_sock_lib()
*/
function send_udp($packet, $packet_data)
{
if (extension_loaded('sockets') && $this->useEnhancedSockets) {
if ($this->debug) {
echo "\n;; using extended PHP sockets\n";
}
return $this->send_udp_with_sock_lib($packet, $packet_data);
} else {
if ($this->debug) {
echo "\n;; using simple sockets\n";
}
return $this->send_udp_no_sock_lib($packet, $packet_data);
}
}
/* }}} */
/* Net_DNS_Resolver::make_query_packet($packetORname, $type = '', $class = '') {{{ */
/**
* Unknown
*/
function make_query_packet($packetORname, $type = '', $class = '')
{
if (is_object($packetORname) && strcasecmp(get_class($packetORname), 'net_dns_packet') == 0) {
$packet = $packetORname;
} else {
$name = $packetORname;
if ($type == '') {
$type = 'A';
}
if ($class == '') {
$class = 'IN';
}
/*
* If the name looks like an IP address then do an appropriate
* PTR query.
*/
if (preg_match('/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/', $name, $regs)) {
$name = $regs[4].'.'.$regs[3].'.'.$regs[2].'.'.$regs[1].'.in-addr.arpa.';
$type = 'PTR';
}
if ($this->debug) {
echo ";; query($name, $type, $class)\n";
}
$packet = new Net_DNS_Packet($this->debug);
$packet->buildQuestion($name, $type, $class);
}
$packet->header->rd = $this->recurse;
return $packet;
}
/* }}} */
/* Net_DNS_Resolver::axfr_old($dname, $class = 'IN') {{{ */
/**
* Performs an AXFR query (zone transfer) (OLD BUGGY STYLE)
*
* This is deprecated and should not be used!
*
* @param string $dname The domain (zone) to transfer
* @param string $class The class in which to look for the zone.
* @return object Net_DNS_Packet
* @access public
*/
function axfr_old($dname, $class = 'IN')
{
return $this->axfr($dname, $class, true);
}
/* }}} */
/* Net_DNS_Resolver::axfr($dname, $class = 'IN', $old = false) {{{ */
/**
* Performs an AXFR query (zone transfer)
*
* Requests a zone transfer from the nameservers. Note that zone
* transfers will ALWAYS use TCP regardless of the setting of the
* Net_DNS_Resolver::$usevc flag. If $old is set to true, Net_DNS requires
* a nameserver that supports the many-answers style transfer format. Large
* zone transfers will not function properly. Setting $old to true is _NOT_
* recommended and should only be used for backwards compatibility.
*
* @param string $dname The domain (zone) to transfer
* @param string $class The class in which to look for the zone.
* @param boolean $old Requires 'old' style many-answer format to function.
Used for backwards compatibility only.
* @return object Net_DNS_Packet
* @access public
*/
function axfr($dname, $class = 'IN', $old = false)
{
if ($old) {
if ($this->debug) {
echo ";; axfr_start($dname, $class)\n";
}
if (! count($this->nameservers)) {
$this->errorstring = 'no nameservers';
if ($this->debug) {
echo ";; ERROR: no nameservers\n";
}
return null;
}
$packet = $this->make_query_packet($dname, 'AXFR', $class);
$packet_data = $packet->data();
$ans = $this->send_tcp($packet, $packet_data);
return $ans;
} else {
if ($this->axfr_start($dname, $class) === null) {
return null;
}
$ret = array();
while (($ans = $this->axfr_next()) !== null) {
if ($ans === null) {
return null;
}
array_push($ret, $ans);
}
return $ret;
}
}
/* }}} */
/* Net_DNS_Resolver::axfr_start($dname, $class = 'IN') {{{ */
/**
* Sends a packet via TCP to the list of name servers.
*
* @param string $packet A packet object to send to the NS list
* @param string $packet_data The data in the packet as returned by
* the Net_DNS_Packet::data() method
* @return object Net_DNS_Packet Returns an answer packet object
* @see Net_DNS_Resolver::send_tcp()
*/
function axfr_start($dname, $class = 'IN')
{
if ($this->debug) {
echo ";; axfr_start($dname, $class)\n";
}
if (! count($this->nameservers)) {
$this->errorstring = "no nameservers";
if ($this->debug) {
echo ";; ERROR: axfr_start: no nameservers\n";
}
return null;
}
$packet = $this->make_query_packet($dname, "AXFR", $class);
$packet_data = $packet->data();
$timeout = $this->tcp_timeout;
foreach ($this->nameservers as $ns) {
$dstport = $this->port;
if ($this->debug) {
echo ";; axfr_start($ns:$dstport)\n";
}
$sock_key = "$ns:$dstport";
if (is_resource($this->sockets[$sock_key])) {
$sock = &$this->sockets[$sock_key];
} else {
if (! ($sock = fsockopen($ns, $dstport, $errno,
$errstr, $timeout))) {
$this->errorstring = "connection failed";
if ($this->debug) {
echo ";; ERROR: axfr_start: connection failed: $errstr\n";
}
continue;
}
$this->sockets[$sock_key] = $sock;
unset($sock);
$sock = &$this->sockets[$sock_key];
}
$lenmsg = pack("n", strlen($packet_data));
if ($this->debug) {
echo ";; sending " . strlen($packet_data) . " bytes\n";
}
if (($sent = fwrite($sock, $lenmsg)) == -1) {
$this->errorstring = "length send failed";
if ($this->debug) {
echo ";; ERROR: axfr_start: length send failed\n";
}
continue;
}
if (($sent = fwrite($sock, $packet_data)) == -1) {
$this->errorstring = "packet send failed";
if ($this->debug) {
echo ";; ERROR: axfr_start: packet data send failed\n";
}
}
socket_set_timeout($sock, $timeout);
$this->_axfr_sock = $sock;
$this->_axfr_rr = array();
$this->_axfr_soa_count = 0;
return $sock;
}
}
/* }}} */
/* Net_DNS_Resolver::axfr_next() {{{ */
/**
* Requests the next RR from a existing transfer started with axfr_start
*
* @return object Net_DNS_RR Returns a Net_DNS_RR object of the next RR
* from a zone transfer.
* @see Net_DNS_Resolver::send_tcp()
*/
function axfr_next()
{
if (! count($this->_axfr_rr)) {
if (! isset($this->_axfr_sock) || ! is_resource($this->_axfr_sock)) {
$this->errorstring = 'no zone transfer in progress';
return null;
}
$timeout = $this->tcp_timeout;
$buf = $this->read_tcp($this->_axfr_sock, 2, $this->debug);
if (! strlen($buf)) {
$this->errorstring = 'truncated zone transfer';
return null;
}
$len = unpack('n1len', $buf);
$len = $len['len'];
if (! $len) {
$this->errorstring = 'truncated zone transfer';
return null;
}
$buf = $this->read_tcp($this->_axfr_sock, $len, $this->debug);
if ($this->debug) {
echo ';; received ' . strlen($buf) . "bytes\n";
}
if (strlen($buf) != $len) {
$this->errorstring = 'expected ' . $len . ' bytes, received ' . strlen($buf);
if ($this->debug) {
echo ';; ' . $err . "\n";
}
return null;
}
$ans = new Net_DNS_Packet($this->debug);
if (! $ans->parse($buf)) {
if (! $this->errorstring) {
$this->errorstring = 'unknown error during packet parsing';
}
return null;
}
if ($ans->header->ancount < 1) {
$this->errorstring = 'truncated zone transfer';
return null;
}
if ($ans->header->rcode != 'NOERROR') {
$this->errorstring = 'errorcode ' . $ans->header->rcode . ' returned';
return null;
}
foreach ($ans->answer as $rr) {
if ($rr->type == 'SOA') {
if (++$this->_axfr_soa_count < 2) {
array_push($this->_axfr_rr, $rr);
}
} else {
array_push($this->_axfr_rr, $rr);
}
}
if ($this->_axfr_soa_count >= 2) {
unset($this->_axfr_sock);
}
}
$rr = array_shift($this->_axfr_rr);
return $rr;
}
/* }}} */
/* Net_DNS_Resolver::read_tcp() {{{ */
/**
* Unknown - not ported yet
*/
function read_tcp($sock, $nbytes, $debug = 0)
{
$buf = '';
while (strlen($buf) < $nbytes) {
$nread = $nbytes - strlen($buf);
$read_buf = '';
if ($debug) {
echo ";; read_tcp: expecting $nread bytes\n";
}
$read_buf = fread($sock, $nread);
if (! strlen($read_buf)) {
if ($debug) {
echo ";; ERROR: read_tcp: fread failed\n";
}
break;
}
if ($debug) {
echo ';; read_tcp: received ' . strlen($read_buf) . " bytes\n";
}
if (!strlen($read_buf)) {
break;
}
$buf .= $read_buf;
}
return $buf;
}
/* }}} */
}
/* }}} */
/* VIM settings {{{
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* soft-stop-width: 4
* c indent on
* expandtab on
* End:
* vim600: sw=4 ts=4 sts=4 cindent fdm=marker et
* vim<600: sw=4 ts=4
* }}} */
?>