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- <?php
- /*
- * License Information:
- *
- * Net_DNS: A resolver library for PHP
- * Copyright (C) 2002 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("$phpdns_basedir/DNS/RR/A.php");
- require_once("$phpdns_basedir/DNS/RR/NS.php");
- require_once("$phpdns_basedir/DNS/RR/CNAME.php");
- require_once("$phpdns_basedir/DNS/RR/PTR.php");
- require_once("$phpdns_basedir/DNS/RR/SOA.php");
- require_once("$phpdns_basedir/DNS/RR/MX.php");
- require_once("$phpdns_basedir/DNS/RR/TSIG.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 $rdata;
- /* }}} */
-
- /*
- * I finally did it... i pass an array to the function
- * instead of a parameter list... UGH... i hate perl...
- */
- /* class constructor - Net_DNS_RR($rrdata) {{{ */
- function Net_DNS_RR($rrdata)
- {
- if (is_string($rrdata)) {
- $this = $this->new_from_string($rrdata);
- } else if (count($rrdata) == 7) {
- list ($name, $rrtype, $rrclass, $ttl, $rdlength, $data, $offset) = $rrdata;
- $this = $this->new_from_data($name, $rrtype, $rrclass, $ttl, $rdlength, $data, $offset);
- } else {
- $this = $this->new_from_array($rrdata);
- }
- }
-
- /* }}} */
- /* Net_DNS_RR::new_from_data($name, $ttl, $rrtype, $rrclass, $rdlength, $data, $offset) {{{ */
- function new_from_data($name, $rrtype, $rrclass, $ttl, $rdlength, $data, $offset)
- {
- $this->name = $name;
- $this->type = $rrtype;
- $this->class = $rrclass;
- $this->ttl = $ttl;
- $this->rdlength = $rdlength;
- $this->rdata = substr($data, $offset, $rdlength);
- if (class_exists("Net_DNS_RR_" . $rrtype)) {
- $scn = "Net_DNS_RR_" . $rrtype;
- $subclass = new $scn($this, $data, $offset);
- return($subclass);
- } else {
- return($this);
- }
- }
-
- /* }}} */
- /* Net_DNS_RR::new_from_string($rrstring, $update_type = "") {{{ */
- function new_from_string($rrstring, $update_type = "")
- {
- $ttl = 0;
- $parts = preg_split("/[\s]+/", $rrstring);
- while ($s = array_shift($parts)) {
- if (!strlen($name)) {
- $name = ereg_replace("\.+$", "", $s);
- } else if (preg_match("/^\d+$/", $s)) {
- $ttl = $s;
- } else if (!strlen($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;
- $rrclass = "IN";
- } else if (! strlen($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)) {
- $this->name = $name;
- $this->type = $rrtype;
- $this->class = $rrclass;
- $this->ttl = $ttl;
- $this->rdlength = 0;
- $this->rdata = "";
-
- if (class_exists("Net_DNS_RR_" . $rrtype)) {
- $scn = "Net_DNS_RR_" . $rrtype;
- $rc = new $scn($this, $rdata);
- return($rc);
- } else {
- return($this);
- }
- } else {
- return(NULL);
- }
- }
-
- /* }}} */
- /* Net_DNS_RR::new_from_array($rrarray) {{{ */
- function new_from_array($rrarray)
- {
- foreach ($rrarray as $k => $v) {
- $this->{strtolower($k)} = $v;
- }
-
- if (! strlen($this->name)) {
- return(NULL);
- }
- if (! strlen($this->type)){
- return(NULL);
- }
- if (! $this->ttl) {
- $this->ttl = 0;
- }
- if (! strlen($this->class)) {
- $this->class = "IN";
- }
- if (strlen($this->rdata)) {
- $this->rdlength = strlen($rdata);
- }
- if (class_exists("Net_DNS_RR_" . $rrtype)) {
- $scn = "Net_DNS_RR_" . $rrtype;
- $rc = new $scn($this, $rdata);
- return($rc);
- } else
- return($this);
- }
-
- /* }}} */
- /* 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
- * }}} */
- ?>
-