-# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
-#
-# SPDX-License-Identifier: MPL-2.0
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, you can obtain one at https://mozilla.org/MPL/2.0/.
-#
-# See the COPYRIGHT file distributed with this work for additional
-# information regarding copyright ownership.
+"""
+Copyright (C) Internet Systems Consortium, Inc. ("ISC")
-from __future__ import print_function
-import os
-import sys
-import signal
-import socket
-import select
-import struct
-from datetime import datetime, timedelta
-import time
-import functools
+SPDX-License-Identifier: MPL-2.0
-import dns, dns.message, dns.query, dns.flags
-from dns.rdatatype import *
-from dns.rdataclass import *
-from dns.rcode import *
-from dns.name import *
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+file, you can obtain one at https://mozilla.org/MPL/2.0/.
+See the COPYRIGHT file distributed with this work for additional
+information regarding copyright ownership.
+"""
-# Log query to file
-def logquery(type, qname):
- with open("qlog", "a") as f:
- f.write("%s %s\n", type, qname)
+from typing import AsyncGenerator
+import dns.rdatatype
-# Create a UDP listener
-def udp_listen(ip, port, is_ipv6=False):
- try:
- udp = socket.socket(
- socket.AF_INET6 if is_ipv6 else socket.AF_INET, socket.SOCK_DGRAM
- )
- try:
- udp.bind((ip, port))
- except:
- udp.close()
- udp = None
- except:
- udp = None
+from isctest.asyncserver import (
+ ControllableAsyncDnsServer,
+ DnsResponseSend,
+ DomainHandler,
+ QueryContext,
+ ResponseAction,
+ ToggleResponsesCommand,
+)
- if udp is None and not is_ipv6:
- raise socket.error("Can not create an IPv4 UDP listener")
- return udp
+class ExtraAnswersHandler(DomainHandler):
+ """
+ Answer from zone data, inserting extra RRsets into responses to A queries.
+ """
+ domains = ["attackSecureDomain.net3."]
-# Create a TCP listener
-def tcp_listen(ip, port, is_ipv6=False):
- try:
- tcp = socket.socket(
- socket.AF_INET6 if is_ipv6 else socket.AF_INET, socket.SOCK_STREAM
- )
- try:
- tcp.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
- tcp.bind((ip, port))
- tcp.listen(100)
- except:
- tcp.close()
- tcp = None
- except:
- tcp = None
-
- if tcp is None and not is_ipv6:
- raise socket.error("Can not create an IPv4 TCP listener")
-
- return tcp
-
-
-############################################################################
-# Control channel - send "1" or "0" to enable or disable the "silent" mode.
-############################################################################
-silent = False
-
-
-def ctrl_channel(msg):
- global silent
-
- msg = msg.splitlines().pop(0)
- print("Received control message: %s" % msg)
-
- if len(msg) != 1:
- return
-
- if silent:
- if msg == b"0":
- silent = False
- print("Silent mode was disabled")
- else:
- if msg == b"1":
- silent = True
- print("Silent mode was enabled")
-
-
-############################################################################
-# Respond to a DNS query.
-############################################################################
-def create_response(msg):
- m = dns.message.from_wire(msg)
- qname = m.question[0].name.to_text()
- rrtype = m.question[0].rdtype
- typename = dns.rdatatype.to_text(rrtype)
-
- with open("query.log", "a") as f:
- f.write("%s %s\n" % (typename, qname))
- print("%s %s" % (typename, qname), end=" ")
-
- r = dns.message.make_response(m)
- r.set_rcode(NOERROR)
- if rrtype == A:
- tld = qname.split(".")[-2] + "."
- ns = "local." + tld
- r.answer.append(dns.rrset.from_text(qname, 300, IN, A, "10.53.0.11"))
- r.answer.append(dns.rrset.from_text(tld, 300, IN, NS, "local." + tld))
- r.additional.append(dns.rrset.from_text(ns, 300, IN, A, "10.53.0.11"))
- elif rrtype == NS:
- r.answer.append(dns.rrset.from_text(qname, 300, IN, NS, "."))
- elif rrtype == SOA:
- r.answer.append(dns.rrset.from_text(qname, 300, IN, SOA, ". . 0 0 0 0 0"))
- else:
- r.authority.append(dns.rrset.from_text(qname, 300, IN, SOA, ". . 0 0 0 0 0"))
- r.flags |= dns.flags.AA
- return r
-
-
-def sigterm(signum, frame):
- print("Shutting down now...")
- os.remove("ans.pid")
- running = False
- sys.exit(0)
-
-
-############################################################################
-# Main
-#
-# Set up responder and control channel, open the pid file, and start
-# the main loop, listening for queries on the query channel or commands
-# on the control channel and acting on them.
-############################################################################
-ip4 = "10.53.0.11"
-ip6 = "fd92:7065:b8e:ffff::11"
-
-try:
- port = int(os.environ["PORT"])
-except:
- port = 5300
-
-try:
- ctrlport = int(os.environ["EXTRAPORT1"])
-except:
- ctrlport = 5300
-
-ctrl4_tcp = tcp_listen(ip4, ctrlport)
-query4_udp = udp_listen(ip4, port)
-query6_udp = udp_listen(ip6, port, is_ipv6=True)
-query4_tcp = tcp_listen(ip4, port)
-query6_tcp = tcp_listen(ip6, port, is_ipv6=True)
-
-havev6 = query6_udp is not None and query6_tcp is not None
-
-signal.signal(signal.SIGTERM, sigterm)
-
-f = open("ans.pid", "w")
-pid = os.getpid()
-print(pid, file=f)
-f.close()
-
-running = True
-
-print("Listening on %s port %d" % (ip4, ctrlport))
-print("Listening on %s port %d" % (ip4, port))
-if havev6:
- print("Listening on %s port %d" % (ip6, port))
+ async def get_responses(
+ self, qctx: QueryContext
+ ) -> AsyncGenerator[ResponseAction, None]:
+ if qctx.qtype == dns.rdatatype.A:
+ ns_rrset = dns.rrset.from_text(
+ "net3.", 300, qctx.qclass, dns.rdatatype.NS, "local.net3."
+ )
+ qctx.response.answer.append(ns_rrset)
+ a_rrset = dns.rrset.from_text(
+ "local.net3.", 300, qctx.qclass, dns.rdatatype.A, "10.53.0.11"
+ )
+ qctx.response.additional.append(a_rrset)
-print("Ctrl-c to quit")
+ yield DnsResponseSend(qctx.response)
-if havev6:
- input = [ctrl4_tcp, query4_udp, query6_udp, query4_tcp, query6_tcp]
-else:
- input = [ctrl4_tcp, query4_udp, query4_tcp]
-hung_conns = []
+def main() -> None:
+ server = ControllableAsyncDnsServer(commands=[ToggleResponsesCommand])
+ server.install_response_handler(ExtraAnswersHandler())
+ server.run()
-while running:
- try:
- inputready, outputready, exceptready = select.select(input, [], [])
- except select.error as e:
- break
- except socket.error as e:
- break
- except KeyboardInterrupt:
- break
- for s in inputready:
- if s == ctrl4_tcp:
- print("Control channel connected")
- conn = None
- try:
- # Handle control channel input
- conn, addr = s.accept()
- msg = conn.recv(1)
- if msg:
- ctrl_channel(msg)
- conn.close()
- except s.timeout:
- pass
- if conn:
- conn.close()
- elif s == query4_tcp or s == query6_tcp:
- print(
- "TCP query received on %s" % (ip4 if s == query4_tcp else ip6), end=" "
- )
- conn = None
- try:
- # Handle incoming queries
- conn, addr = s.accept()
- if not silent:
- # get TCP message length
- msg = conn.recv(2)
- if len(msg) != 2:
- print("NO RESPONSE (can not read the message length)")
- conn.close()
- continue
- length = struct.unpack(">H", msg[:2])[0]
- msg = conn.recv(length)
- if len(msg) != length:
- print("NO RESPONSE (can not read the message)")
- conn.close()
- continue
- rsp = create_response(msg)
- if rsp:
- print(dns.rcode.to_text(rsp.rcode()))
- wire = rsp.to_wire()
- conn.send(struct.pack(">H", len(wire)))
- conn.send(wire)
- else:
- print("NO RESPONSE (can not create a response)")
- else:
- # Do not respond and hang the connection.
- print("NO RESPONSE (silent mode)")
- hung_conns.append(conn)
- continue
- except socket.error as e:
- print("NO RESPONSE (error: %s)" % str(e))
- if conn:
- conn.close()
- elif s == query4_udp or s == query6_udp:
- print(
- "UDP query received on %s" % (ip4 if s == query4_udp else ip6), end=" "
- )
- # Handle incoming queries
- msg = s.recvfrom(65535)
- if not silent:
- rsp = create_response(msg[0])
- if rsp:
- print(dns.rcode.to_text(rsp.rcode()))
- s.sendto(rsp.to_wire(), msg[1])
- else:
- print("NO RESPONSE (can not create a response)")
- else:
- # Do not respond.
- print("NO RESPONSE (silent mode)")
- if not running:
- break
+if __name__ == "__main__":
+ main()
+++ /dev/null
-#!/usr/bin/perl
-
-# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
-#
-# SPDX-License-Identifier: MPL-2.0
-#
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, you can obtain one at https://mozilla.org/MPL/2.0/.
-#
-# See the COPYRIGHT file distributed with this work for additional
-# information regarding copyright ownership.
-
-#
-# This is the name server from hell. It provides canned
-# responses based on pattern matching the queries, and
-# can be reprogrammed on-the-fly over a TCP connection.
-#
-# The server listens for queries on port 5300 (or PORT).
-#
-# The server listens for control connections on port 5301 (or EXTRAPORT1).
-#
-# A control connection is a TCP stream of lines like
-#
-# /pattern/
-# name ttl type rdata
-# name ttl type rdata
-# ...
-# /pattern/
-# name ttl type rdata
-# name ttl type rdata
-# ...
-#
-# There can be any number of patterns, each associated
-# with any number of response RRs. Each pattern is a
-# Perl regular expression. If an empty pattern ("//") is
-# received, the server will ignore all incoming queries (TCP
-# connections will still be accepted, but both UDP queries
-# and TCP queries will not be responded to). If a non-empty
-# pattern is then received over the same control connection,
-# default behavior is restored.
-#
-# Each incoming query is converted into a string of the form
-# "qname qtype" (the printable query domain name, space,
-# printable query type) and matched against each pattern.
-#
-# The first pattern matching the query is selected, and
-# the RR following the pattern line are sent in the
-# answer section of the response.
-#
-# Each new control connection causes the current set of
-# patterns and responses to be cleared before adding new
-# ones.
-#
-# The server handles UDP and TCP queries. Zone transfer
-# responses work, but must fit in a single 64 k message.
-#
-# Now you can add TSIG, just specify key/key data with:
-#
-# /pattern <key> <key_data>/
-# name ttl type rdata
-# name ttl type rdata
-#
-# Note that this data will still be sent with any request for
-# pattern, only this data will be signed. Currently, this is only
-# done for TCP.
-#
-# /pattern bad-id <key> <key_data>/
-# /pattern bad-id/
-#
-# will add 50 to the message id of the response.
-
-
-use IO::File;
-use IO::Socket;
-use Data::Dumper;
-use Net::DNS;
-use Net::DNS::Packet;
-use strict;
-
-# Ignore SIGPIPE so we won't fail if peer closes a TCP socket early
-local $SIG{PIPE} = 'IGNORE';
-
-# Flush logged output after every line
-local $| = 1;
-
-# We default to listening on 10.53.0.2 for historical reasons
-# XXX: we should also be able to specify IPv6
-my $server_addr = "10.53.0.6";
-if (@ARGV > 0) {
- $server_addr = @ARGV[0];
-}
-
-my $mainport = int($ENV{'PORT'});
-if (!$mainport) { $mainport = 5300; }
-my $ctrlport = int($ENV{'EXTRAPORT1'});
-if (!$ctrlport) { $ctrlport = 5301; }
-
-print "listening on $server_addr:$mainport,$ctrlport.\n";
-print "Using Net::DNS $Net::DNS::VERSION\n";
-
-# XXX: we should also be able to set the port numbers to listen on.
-my $ctlsock = IO::Socket::INET->new(LocalAddr => "$server_addr",
- LocalPort => $ctrlport, Proto => "tcp", Listen => 5, Reuse => 1) or die "$!";
-
-my $udpsock = IO::Socket::INET->new(LocalAddr => "$server_addr",
- LocalPort => $mainport, Proto => "udp", Reuse => 1) or die "$!";
-
-my $tcpsock = IO::Socket::INET->new(LocalAddr => "$server_addr",
- LocalPort => $mainport, Proto => "tcp", Listen => 5, Reuse => 1) or die "$!";
-
-my $pidf = new IO::File "ans.pid", "w" or die "cannot open pid file: $!";
-print $pidf "$$\n" or die "cannot write pid file: $!";
-$pidf->close or die "cannot close pid file: $!";;
-sub rmpid { unlink "ans.pid"; exit 1; };
-
-$SIG{INT} = \&rmpid;
-$SIG{TERM} = \&rmpid;
-
-#my @answers = ();
-my @rules;
-my $udphandler;
-my $tcphandler;
-
-sub handleUDP {
- my ($buf) = @_;
- my $request;
-
- if ($Net::DNS::VERSION > 0.68) {
- $request = new Net::DNS::Packet(\$buf, 0);
- $@ and die $@;
- } else {
- my $err;
- ($request, $err) = new Net::DNS::Packet(\$buf, 0);
- $err and die $err;
- }
-
- my @questions = $request->question;
- my $qname = $questions[0]->qname;
- my $qtype = $questions[0]->qtype;
- my $qclass = $questions[0]->qclass;
- my $id = $request->header->id;
-
- my $packet = new Net::DNS::Packet($qname, $qtype, $qclass);
- $packet->header->qr(1);
- $packet->header->aa(1);
- $packet->header->id($id);
-
- # get the existing signature if any, and clear the additional section
- my $prev_tsig;
- while (my $rr = $request->pop("additional")) {
- $prev_tsig = $rr if ($rr->type eq "TSIG");
- }
-
- my $r;
- my $answers = 0;
- my $match;
- my $key_name;
- my $key_data;
- foreach $r (@rules) {
- my $pattern = $r->{pattern};
- ($match, $key_name, $key_data) = split(/ /,$pattern);
- print "[handleUDP] $match, $key_name, $key_data\n";
- $match =~ tr/\// /;
- if ("$qname $qtype" =~ /$match/) {
- my $a;
- foreach $a (@{$r->{answer}}) {
- my $resp;
- $resp = new Net::DNS::RR("$qname $a");
- $packet->push("answer", $resp);
- ++$answers;
- }
- last;
- }
- }
- if ($answers eq 0) {
- my $soa;
- $soa = new Net::DNS::RR("$qname 300 IN SOA . . 0 0 0 0 0");
- $packet->push("authority", $soa)
- }
- if (defined($key_name) && defined($key_data)) {
- my $tsig;
- # Sign the packet
- print " Signing the response with " .
- "$key_name/$key_data\n";
-
- if ($Net::DNS::VERSION < 0.69) {
- $tsig = Net::DNS::RR->new(
- "$key_name TSIG $key_data");
- } else {
- $tsig = Net::DNS::RR->new(
- name => $key_name,
- type => 'TSIG',
- key => $key_data);
- }
-
- # These kluges are necessary because Net::DNS
- # doesn't know how to sign responses. We
- # clear compnames so that the TSIG key and
- # algorithm name won't be compressed, and
- # add one to arcount because the signing
- # function will attempt to decrement it,
- # which is incorrect in a response. Finally
- # we set request_mac to the previous digest.
- $packet->{"compnames"} = {}
- if ($Net::DNS::VERSION < 0.70);
- $packet->{"header"}{"arcount"} += 1
- if ($Net::DNS::VERSION < 0.70);
- if (defined($prev_tsig)) {
- if ($Net::DNS::VERSION < 0.73) {
- my $rmac = pack('n H*',
- length($prev_tsig->mac)/2,
- $prev_tsig->mac);
- $tsig->{"request_mac"} =
- unpack("H*", $rmac);
- } else {
- $tsig->request_mac(
- $prev_tsig->mac);
- }
- }
-
- $packet->sign_tsig($tsig);
- }
- #$packet->print;
-
- return $packet->data;
-}
-
-# namelen:
-# given a stream of data, reads a DNS-formatted name and returns its
-# total length, thus making it possible to skip past it.
-sub namelen {
- my ($data) = @_;
- my $len = 0;
- my $label_len = 0;
- do {
- $label_len = unpack("c", $data);
- $data = substr($data, $label_len + 1);
- $len += $label_len + 1;
- } while ($label_len != 0);
- return ($len);
-}
-
-# packetlen:
-# given a stream of data, reads a DNS wire-format packet and returns
-# its total length, making it possible to skip past it.
-sub packetlen {
- my ($data) = @_;
- my $q;
- my $rr;
- my $header;
- my $offset;
-
- #
- # decode/encode were introduced in Net::DNS 0.68
- # parse is no longer a method and calling it here makes perl croak.
- #
- my $decode = 0;
- $decode = 1 if ($Net::DNS::VERSION >= 0.68);
-
- if ($decode) {
- ($header, $offset) = Net::DNS::Header->decode(\$data);
- } else {
- ($header, $offset) = Net::DNS::Header->parse(\$data);
- }
-
- for (1 .. $header->qdcount) {
- if ($decode) {
- ($q, $offset) =
- Net::DNS::Question->decode(\$data, $offset);
- } else {
- ($q, $offset) =
- Net::DNS::Question->parse(\$data, $offset);
- }
- }
- for (1 .. $header->ancount) {
- if ($decode) {
- ($q, $offset) = Net::DNS::RR->decode(\$data, $offset);
- } else {
- ($q, $offset) = Net::DNS::RR->parse(\$data, $offset);
- }
- }
- for (1 .. $header->nscount) {
- if ($decode) {
- ($q, $offset) = Net::DNS::RR->decode(\$data, $offset);
- } else {
- ($q, $offset) = Net::DNS::RR->parse(\$data, $offset);
- }
- }
- for (1 .. $header->arcount) {
- if ($decode) {
- ($q, $offset) = Net::DNS::RR->decode(\$data, $offset);
- } else {
- ($q, $offset) = Net::DNS::RR->parse(\$data, $offset);
- }
- }
- return $offset;
-}
-
-# sign_tcp_continuation:
-# This is a hack to correct the problem that Net::DNS has no idea how
-# to sign multiple-message TCP responses. Several data that are included
-# in the digest when signing a query or the first message of a response are
-# omitted when signing subsequent messages in a TCP stream.
-#
-# Net::DNS::Packet->sign_tsig() has the ability to use a custom signing
-# function (specified by calling Packet->sign_func()). We use this
-# function as the signing function for TCP continuations, and it removes
-# the unwanted data from the digest before calling the default sign_hmac
-# function.
-sub sign_tcp_continuation {
- my ($key, $data) = @_;
-
- # copy out first two bytes: size of the previous MAC
- my $rmacsize = unpack("n", $data);
- $data = substr($data, 2);
-
- # copy out previous MAC
- my $rmac = substr($data, 0, $rmacsize);
- $data = substr($data, $rmacsize);
-
- # try parsing out the packet information
- my $plen = packetlen($data);
- my $pdata = substr($data, 0, $plen);
- $data = substr($data, $plen);
-
- # remove the keyname, ttl, class, and algorithm name
- $data = substr($data, namelen($data));
- $data = substr($data, 6);
- $data = substr($data, namelen($data));
-
- # preserve the TSIG data
- my $tdata = substr($data, 0, 8);
-
- # prepare a new digest and sign with it
- $data = pack("n", $rmacsize) . $rmac . $pdata . $tdata;
- return Net::DNS::RR::TSIG::sign_hmac($key, $data);
-}
-
-sub handleTCP {
- my ($buf) = @_;
- my $request;
-
- if ($Net::DNS::VERSION > 0.68) {
- $request = new Net::DNS::Packet(\$buf, 0);
- $@ and die $@;
- } else {
- my $err;
- ($request, $err) = new Net::DNS::Packet(\$buf, 0);
- $err and die $err;
- }
-
- my @questions = $request->question;
- my $qname = $questions[0]->qname;
- my $qtype = $questions[0]->qtype;
- my $qclass = $questions[0]->qclass;
- my $id = $request->header->id;
-
- my $opaque;
-
- my $packet = new Net::DNS::Packet($qname, $qtype, $qclass);
- $packet->header->qr(1);
- $packet->header->aa(1);
- $packet->header->id($id);
-
- # get the existing signature if any, and clear the additional section
- my $prev_tsig;
- my $signer;
- my $continuation = 0;
- if ($Net::DNS::VERSION < 0.81) {
- while (my $rr = $request->pop("additional")) {
- if ($rr->type eq "TSIG") {
- $prev_tsig = $rr;
- }
- }
- }
-
- my @results = ();
- my $count_these = 0;
-
- my $r;
- my $answers = 0;
- my $match;
- my $key_name;
- my $key_data;
- my $tname;
- foreach $r (@rules) {
- my $pattern = $r->{pattern};
- my($match, $key_name, $key_data, $tname) = split(/ /,$pattern);
- print "[handleTCP] $match, $key_name, $key_data, $tname \n";
- $match =~ tr/\// /;
- if ("$qname $qtype" =~ /$match/) {
- $count_these++;
- my $a;
- foreach $a (@{$r->{answer}}) {
- my $resp;
- $resp = new Net::DNS::RR("$qname $a");
- $packet->push("answer", $resp);
- ++$answers;
- }
- last;
- }
- }
- if ($answers eq 0) {
- my $soa;
- $soa = new Net::DNS::RR("$qname 300 SOA . . 0 0 0 0 0");
- $packet->push("authority", $soa)
- }
- if (defined($key_name) && $key_name eq "bad-id") {
- $packet->header->id(($id+50)%0xffff);
- $key_name = $key_data;
- ($key_data, $tname) = split(/ /,$tname)
- }
- if (defined($key_name) && defined($key_data)) {
- my $tsig;
- # sign the packet
- print " Signing the data with " .
- "$key_name/$key_data\n";
-
- if ($Net::DNS::VERSION < 0.69) {
- $tsig = Net::DNS::RR->new(
- "$key_name TSIG $key_data");
- } elsif ($Net::DNS::VERSION >= 0.81 &&
- $continuation) {
- } elsif ($Net::DNS::VERSION >= 0.75 &&
- $continuation) {
- $tsig = $prev_tsig;
- } else {
- $tsig = Net::DNS::RR->new(
- name => $key_name,
- type => 'TSIG',
- key => $key_data);
- }
-
- # These kluges are necessary because Net::DNS
- # doesn't know how to sign responses. We
- # clear compnames so that the TSIG key and
- # algorithm name won't be compressed, and
- # add one to arcount because the signing
- # function will attempt to decrement it,
- # which is incorrect in a response. Finally
- # we set request_mac to the previous digest.
- $packet->{"compnames"} = {}
- if ($Net::DNS::VERSION < 0.70);
- $packet->{"header"}{"arcount"} += 1
- if ($Net::DNS::VERSION < 0.70);
- if (defined($prev_tsig)) {
- if ($Net::DNS::VERSION < 0.73) {
- my $rmac = pack('n H*',
- length($prev_tsig->mac)/2,
- $prev_tsig->mac);
- $tsig->{"request_mac"} =
- unpack("H*", $rmac);
- } elsif ($Net::DNS::VERSION < 0.81) {
- $tsig->request_mac(
- $prev_tsig->mac);
- }
- }
-
- $tsig->sign_func($signer) if defined($signer);
- $tsig->continuation($continuation) if
- ($Net::DNS::VERSION >= 0.71 &&
- $Net::DNS::VERSION <= 0.74 );
- if ($Net::DNS::VERSION < 0.81) {
- $packet->sign_tsig($tsig);
- } elsif ($continuation) {
- $opaque = $packet->sign_tsig($opaque);
- } else {
- $opaque = $packet->sign_tsig($request);
- }
- $signer = \&sign_tcp_continuation
- if ($Net::DNS::VERSION < 0.70);
- $continuation = 1;
-
- my $copy =
- Net::DNS::Packet->new(\($packet->data));
- $prev_tsig = $copy->pop("additional");
- }
-
- #$packet->print;
- push(@results,$packet->data);
- if ($tname eq "") {
- $tname = $qname;
- }
- $packet = new Net::DNS::Packet($tname, $qtype, $qclass);
- $packet->header->qr(1);
- $packet->header->aa(1);
- $packet->header->id($id);
- print " A total of $count_these patterns matched\n";
- return \@results;
-}
-
-# Main
-my $rin;
-my $rout;
-for (;;) {
- $rin = '';
- vec($rin, fileno($ctlsock), 1) = 1;
- vec($rin, fileno($tcpsock), 1) = 1;
- vec($rin, fileno($udpsock), 1) = 1;
-
- select($rout = $rin, undef, undef, undef);
-
- if (vec($rout, fileno($ctlsock), 1)) {
- warn "ctl conn";
- my $conn = $ctlsock->accept;
- my $rule = ();
- @rules = ();
- while (my $line = $conn->getline) {
- chomp $line;
- if ($line =~ m!^/(.*)/$!) {
- if (length($1) == 0) {
- $udphandler = sub { return; };
- $tcphandler = sub { return; };
- } else {
- $udphandler = \&handleUDP;
- $tcphandler = \&handleTCP;
- $rule = { pattern => $1, answer => [] };
- push(@rules, $rule);
- }
- } else {
- push(@{$rule->{answer}}, $line);
- }
- }
- $conn->close;
- #print Dumper(@rules);
- #print "+=+=+ $rules[0]->{'pattern'}\n";
- #print "+=+=+ $rules[0]->{'answer'}->[0]->{'rname'}\n";
- #print "+=+=+ $rules[0]->{'answer'}->[0]\n";
- } elsif (vec($rout, fileno($udpsock), 1)) {
- printf "UDP request\n";
- my $buf;
- $udpsock->recv($buf, 512);
- my $result = &$udphandler($buf);
- if (defined($result)) {
- my $num_chars = $udpsock->send($result);
- print " Sent $num_chars bytes via UDP\n";
- }
- } elsif (vec($rout, fileno($tcpsock), 1)) {
- my $conn = $tcpsock->accept;
- my $buf;
- for (;;) {
- my $lenbuf;
- my $n = $conn->sysread($lenbuf, 2);
- last unless $n == 2;
- my $len = unpack("n", $lenbuf);
- $n = $conn->sysread($buf, $len);
- last unless $n == $len;
- print "TCP request\n";
- my $result = &$tcphandler($buf);
- if (defined($result)) {
- foreach my $response (@$result) {
- $len = length($response);
- $n = $conn->syswrite(pack("n", $len), 2);
- $n = $conn->syswrite($response, $len);
- print " Sent: $n chars via TCP\n";
- }
- }
- }
- $conn->close;
- }
-}
projects / thirdparty / bind9.git / commitdiff
