util/TLSProxy/Proxy.pm - third_party/openssl - Git at Google

 # Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
 #
 # Licensed under the OpenSSL license (the "License").  You may not use
 # this file except in compliance with the License.  You can obtain a copy
 # in the file LICENSE in the source distribution or at
 # https://www.openssl.org/source/license.html

 use strict;
 use POSIX ":sys_wait_h";

 package TLSProxy::Proxy;

 use File::Spec;
 use IO::Socket;
 use IO::Select;
 use TLSProxy::Record;
 use TLSProxy::Message;
 use TLSProxy::ClientHello;
 use TLSProxy::HelloRetryRequest;
 use TLSProxy::ServerHello;
 use TLSProxy::EncryptedExtensions;
 use TLSProxy::Certificate;
 use TLSProxy::CertificateVerify;
 use TLSProxy::ServerKeyExchange;
 use TLSProxy::NewSessionTicket;

 my $have_IPv6 = 0;
 my $IP_factory;

 my $is_tls13 = 0;
 my $ciphersuite = undef;

 sub new
 {
     my $class = shift;
     my ($filter,
         $execute,
         $cert,
         $debug) = @_;

     my $self = {
         #Public read/write
         proxy_addr => "localhost",
         proxy_port => 4453,
         server_addr => "localhost",
         server_port => 4443,
         filter => $filter,
         serverflags => "",
         clientflags => "",
         serverconnects => 1,
         serverpid => 0,
         reneg => 0,
         sessionfile => undef,

         #Public read
         execute => $execute,
         cert => $cert,
         debug => $debug,
         cipherc => "",
         ciphers => "AES128-SHA:TLS13-AES-128-GCM-SHA256",
         flight => 0,
         record_list => [],
         message_list => [],
     };

     # IO::Socket::IP is on the core module list, IO::Socket::INET6 isn't.
     # However, IO::Socket::INET6 is older and is said to be more widely
     # deployed for the moment, and may have less bugs, so we try the latter
     # first, then fall back on the code modules.  Worst case scenario, we
     # fall back to IO::Socket::INET, only supports IPv4.
     eval {
         require IO::Socket::INET6;
         my $s = IO::Socket::INET6->new(
             LocalAddr => "::1",
             LocalPort => 0,
             Listen=>1,
             );
         $s or die "\n";
         $s->close();
     };
     if ($@ eq "") {
         $IP_factory = sub { IO::Socket::INET6->new(@_); };
         $have_IPv6 = 1;
     } else {
         eval {
             require IO::Socket::IP;
             my $s = IO::Socket::IP->new(
                 LocalAddr => "::1",
                 LocalPort => 0,
                 Listen=>1,
                 );
             $s or die "\n";
             $s->close();
         };
         if ($@ eq "") {
             $IP_factory = sub { IO::Socket::IP->new(@_); };
             $have_IPv6 = 1;
         } else {
             $IP_factory = sub { IO::Socket::INET->new(@_); };
         }
     }

     return bless $self, $class;
 }

 sub clearClient
 {
     my $self = shift;

     $self->{cipherc} = "";
     $self->{flight} = 0;
     $self->{record_list} = [];
     $self->{message_list} = [];
     $self->{clientflags} = "";
     $self->{sessionfile} = undef;
     $is_tls13 = 0;
     $ciphersuite = undef;

     TLSProxy::Message->clear();
     TLSProxy::Record->clear();
 }

 sub clear
 {
     my $self = shift;

     $self->clearClient;
     $self->{ciphers} = "AES128-SHA:TLS13-AES-128-GCM-SHA256";
     $self->{serverflags} = "";
     $self->{serverconnects} = 1;
     $self->{serverpid} = 0;
     $self->{reneg} = 0;
 }

 sub restart
 {
     my $self = shift;

     $self->clear;
     $self->start;
 }

 sub clientrestart
 {
     my $self = shift;

     $self->clear;
     $self->clientstart;
 }

 sub start
 {
     my ($self) = shift;
     my $pid;

     $pid = fork();
     if ($pid == 0) {
         if (!$self->debug) {
             open(STDOUT, ">", File::Spec->devnull())
                 or die "Failed to redirect stdout: $!";
             open(STDERR, ">&STDOUT");
         }
         my $execcmd = $self->execute
             ." s_server -no_comp -rev -engine ossltest -accept "
             .($self->server_port)
             ." -cert ".$self->cert." -cert2 ".$self->cert
             ." -naccept ".$self->serverconnects;
         if ($self->ciphers ne "") {
             $execcmd .= " -cipher ".$self->ciphers;
         }
         if ($self->serverflags ne "") {
             $execcmd .= " ".$self->serverflags;
         }
         exec($execcmd);
     }
     $self->serverpid($pid);

     return $self->clientstart;
 }

 sub clientstart
 {
     my ($self) = shift;
     my $oldstdout;

     if(!$self->debug) {
         open DEVNULL, ">", File::Spec->devnull();
         $oldstdout = select(DEVNULL);
     }

     # Create the Proxy socket
     my $proxaddr = $self->proxy_addr;
     $proxaddr =~ s/[\[\]]//g; # Remove [ and ]
     my $proxy_sock = $IP_factory->(
         LocalHost   => $proxaddr,
         LocalPort   => $self->proxy_port,
         Proto       => "tcp",
         Listen      => SOMAXCONN,
         ReuseAddr   => 1
     );

     if ($proxy_sock) {
         print "Proxy started on port ".$self->proxy_port."\n";
     } else {
         warn "Failed creating proxy socket (".$proxaddr.",".$self->proxy_port."): $!\n";
         return 0;
     }

     if ($self->execute) {
         my $pid = fork();
         if ($pid == 0) {
             if (!$self->debug) {
                 open(STDOUT, ">", File::Spec->devnull())
                     or die "Failed to redirect stdout: $!";
                 open(STDERR, ">&STDOUT");
             }
             my $echostr;
             if ($self->reneg()) {
                 $echostr = "R";
             } else {
                 $echostr = "test";
             }
             my $execcmd = "echo ".$echostr." | ".$self->execute
                  ." s_client -engine ossltest -connect "
                  .($self->proxy_addr).":".($self->proxy_port);
             if ($self->cipherc ne "") {
                 $execcmd .= " -cipher ".$self->cipherc;
             }
             if ($self->clientflags ne "") {
                 $execcmd .= " ".$self->clientflags;
             }
             if (defined $self->sessionfile) {
                 $execcmd .= " -ign_eof";
             }
             exec($execcmd);
         }
     }

     # Wait for incoming connection from client
     my $client_sock;
     if(!($client_sock = $proxy_sock->accept())) {
         warn "Failed accepting incoming connection: $!\n";
         return 0;
     }

     print "Connection opened\n";

     # Now connect to the server
     my $retry = 3;
     my $server_sock;
     #We loop over this a few times because sometimes s_server can take a while
     #to start up
     do {
         my $servaddr = $self->server_addr;
         $servaddr =~ s/[\[\]]//g; # Remove [ and ]
         eval {
             $server_sock = $IP_factory->(
                 PeerAddr => $servaddr,
                 PeerPort => $self->server_port,
                 MultiHomed => 1,
                 Proto => 'tcp'
             );
         };

         $retry--;
         #Some buggy IP factories can return a defined server_sock that hasn't
         #actually connected, so we check peerport too
         if ($@ || !defined($server_sock) || !defined($server_sock->peerport)) {
             $server_sock->close() if defined($server_sock);
             undef $server_sock;
             if ($retry) {
                 #Sleep for a short while
                 select(undef, undef, undef, 0.1);
             } else {
                 warn "Failed to start up server (".$servaddr.",".$self->server_port."): $!\n";
                 return 0;
             }
         }
     } while (!$server_sock);

     my $sel = IO::Select->new($server_sock, $client_sock);
     my $indata;
     my @handles = ($server_sock, $client_sock);

     #Wait for either the server socket or the client socket to become readable
     my @ready;
     my $ctr = 0;
     while(     (!(TLSProxy::Message->end)
                 || (defined $self->sessionfile()
                     && (-s $self->sessionfile()) == 0))
             && $ctr < 10
             && (@ready = $sel->can_read(1))) {
         foreach my $hand (@ready) {
             if ($hand == $server_sock) {
                 $server_sock->sysread($indata, 16384) or goto END;
                 $indata = $self->process_packet(1, $indata);
                 $client_sock->syswrite($indata);
                 $ctr = 0;
             } elsif ($hand == $client_sock) {
                 $client_sock->sysread($indata, 16384) or goto END;
                 $indata = $self->process_packet(0, $indata);
                 $server_sock->syswrite($indata);
                 $ctr = 0;
             } else {
                 $ctr++
             }
         }
     }

     die "No progress made" if $ctr >= 10;

     END:
     print "Connection closed\n";
     if($server_sock) {
         $server_sock->close();
     }
     if($client_sock) {
         #Closing this also kills the child process
         $client_sock->close();
     }
     if($proxy_sock) {
         $proxy_sock->close();
     }
     if(!$self->debug) {
         select($oldstdout);
     }
     $self->serverconnects($self->serverconnects - 1);
     if ($self->serverconnects == 0) {
         die "serverpid is zero\n" if $self->serverpid == 0;
         print "Waiting for server process to close: "
               .$self->serverpid."\n";
         waitpid( $self->serverpid, 0);
         die "exit code $? from server process\n" if $? != 0;
     }
     return 1;
 }

 sub process_packet
 {
     my ($self, $server, $packet) = @_;
     my $len_real;
     my $decrypt_len;
     my $data;
     my $recnum;

     if ($server) {
         print "Received server packet\n";
     } else {
         print "Received client packet\n";
     }

     print "Packet length = ".length($packet)."\n";
     print "Processing flight ".$self->flight."\n";

     #Return contains the list of record found in the packet followed by the
     #list of messages in those records
     my @ret = TLSProxy::Record->get_records($server, $self->flight, $packet);
     push @{$self->record_list}, @{$ret[0]};
     push @{$self->{message_list}}, @{$ret[1]};

     print "\n";

     #Finished parsing. Call user provided filter here
     if(defined $self->filter) {
         $self->filter->($self);
     }

     #Reconstruct the packet
     $packet = "";
     foreach my $record (@{$self->record_list}) {
         #We only replay the records for the current flight
         if ($record->flight != $self->flight) {
             next;
         }
         $packet .= $record->reconstruct_record($server);
     }

     $self->{flight} = $self->{flight} + 1;

     print "Forwarded packet length = ".length($packet)."\n\n";

     return $packet;
 }

 #Read accessors
 sub execute
 {
     my $self = shift;
     return $self->{execute};
 }
 sub cert
 {
     my $self = shift;
     return $self->{cert};
 }
 sub debug
 {
     my $self = shift;
     return $self->{debug};
 }
 sub flight
 {
     my $self = shift;
     return $self->{flight};
 }
 sub record_list
 {
     my $self = shift;
     return $self->{record_list};
 }
 sub success
 {
     my $self = shift;
     return $self->{success};
 }
 sub end
 {
     my $self = shift;
     return $self->{end};
 }
 sub supports_IPv6
 {
     my $self = shift;
     return $have_IPv6;
 }

 #Read/write accessors
 sub proxy_addr
 {
     my $self = shift;
     if (@_) {
         $self->{proxy_addr} = shift;
     }
     return $self->{proxy_addr};
 }
 sub proxy_port
 {
     my $self = shift;
     if (@_) {
         $self->{proxy_port} = shift;
     }
     return $self->{proxy_port};
 }
 sub server_addr
 {
     my $self = shift;
     if (@_) {
         $self->{server_addr} = shift;
     }
     return $self->{server_addr};
 }
 sub server_port
 {
     my $self = shift;
     if (@_) {
         $self->{server_port} = shift;
     }
     return $self->{server_port};
 }
 sub filter
 {
     my $self = shift;
     if (@_) {
         $self->{filter} = shift;
     }
     return $self->{filter};
 }
 sub cipherc
 {
     my $self = shift;
     if (@_) {
         $self->{cipherc} = shift;
     }
     return $self->{cipherc};
 }
 sub ciphers
 {
     my $self = shift;
     if (@_) {
         $self->{ciphers} = shift;
     }
     return $self->{ciphers};
 }
 sub serverflags
 {
     my $self = shift;
     if (@_) {
         $self->{serverflags} = shift;
     }
     return $self->{serverflags};
 }
 sub clientflags
 {
     my $self = shift;
     if (@_) {
         $self->{clientflags} = shift;
     }
     return $self->{clientflags};
 }
 sub serverconnects
 {
     my $self = shift;
     if (@_) {
         $self->{serverconnects} = shift;
     }
     return $self->{serverconnects};
 }
 # This is a bit ugly because the caller is responsible for keeping the records
 # in sync with the updated message list; simply updating the message list isn't
 # sufficient to get the proxy to forward the new message.
 # But it does the trick for the one test (test_sslsessiontick) that needs it.
 sub message_list
 {
     my $self = shift;
     if (@_) {
         $self->{message_list} = shift;
     }
     return $self->{message_list};
 }
 sub serverpid
 {
     my $self = shift;
     if (@_) {
         $self->{serverpid} = shift;
     }
     return $self->{serverpid};
 }

 sub fill_known_data
 {
     my $length = shift;
     my $ret = "";
     for (my $i = 0; $i < $length; $i++) {
         $ret .= chr($i);
     }
     return $ret;
 }

 sub is_tls13
 {
     my $class = shift;
     if (@_) {
         $is_tls13 = shift;
     }
     return $is_tls13;
 }

 sub reneg
 {
     my $self = shift;
     if (@_) {
         $self->{reneg} = shift;
     }
     return $self->{reneg};
 }

 #Setting a sessionfile means that the client will not close until the given
 #file exists. This is useful in TLSv1.3 where otherwise s_client will close
 #immediately at the end of the handshake, but before the session has been
 #received from the server. A side effect of this is that s_client never sends
 #a close_notify, so instead we consider success to be when it sends application
 #data over the connection.
 sub sessionfile
 {
     my $self = shift;
     if (@_) {
         $self->{sessionfile} = shift;
         TLSProxy::Message->successondata(1);
     }
     return $self->{sessionfile};
 }

 sub ciphersuite
 {
     my $class = shift;
     if (@_) {
         $ciphersuite = shift;
     }
     return $ciphersuite;
 }

 1;
	# Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
	#
	# Licensed under the OpenSSL license (the "License"). You may not use
	# this file except in compliance with the License. You can obtain a copy
	# in the file LICENSE in the source distribution or at
	# https://www.openssl.org/source/license.html

	use strict;
	use POSIX ":sys_wait_h";

	package TLSProxy::Proxy;

	use File::Spec;
	use IO::Socket;
	use IO::Select;
	use TLSProxy::Record;
	use TLSProxy::Message;
	use TLSProxy::ClientHello;
	use TLSProxy::HelloRetryRequest;
	use TLSProxy::ServerHello;
	use TLSProxy::EncryptedExtensions;
	use TLSProxy::Certificate;
	use TLSProxy::CertificateVerify;
	use TLSProxy::ServerKeyExchange;
	use TLSProxy::NewSessionTicket;

	my $have_IPv6 = 0;
	my $IP_factory;

	my $is_tls13 = 0;
	my $ciphersuite = undef;

	sub new
	{
	my $class = shift;
	my ($filter,
	$execute,
	$cert,
	$debug) = @_;

	my $self = {
	#Public read/write
	proxy_addr => "localhost",
	proxy_port => 4453,
	server_addr => "localhost",
	server_port => 4443,
	filter => $filter,
	serverflags => "",
	clientflags => "",
	serverconnects => 1,
	serverpid => 0,
	reneg => 0,
	sessionfile => undef,

	#Public read
	execute => $execute,
	cert => $cert,
	debug => $debug,
	cipherc => "",
	ciphers => "AES128-SHA:TLS13-AES-128-GCM-SHA256",
	flight => 0,
	record_list => [],
	message_list => [],
	};

	# IO::Socket::IP is on the core module list, IO::Socket::INET6 isn't.
	# However, IO::Socket::INET6 is older and is said to be more widely
	# deployed for the moment, and may have less bugs, so we try the latter
	# first, then fall back on the code modules. Worst case scenario, we
	# fall back to IO::Socket::INET, only supports IPv4.
	eval {
	require IO::Socket::INET6;
	my $s = IO::Socket::INET6->new(
	LocalAddr => "::1",
	LocalPort => 0,
	Listen=>1,
	);
	$s or die "\n";
	$s->close();
	};
	if ($@ eq "") {
	$IP_factory = sub { IO::Socket::INET6->new(@_); };
	$have_IPv6 = 1;
	} else {
	eval {
	require IO::Socket::IP;
	my $s = IO::Socket::IP->new(
	LocalAddr => "::1",
	LocalPort => 0,
	Listen=>1,
	);
	$s or die "\n";
	$s->close();
	};
	if ($@ eq "") {
	$IP_factory = sub { IO::Socket::IP->new(@_); };
	$have_IPv6 = 1;
	} else {
	$IP_factory = sub { IO::Socket::INET->new(@_); };
	}
	}

	return bless $self, $class;
	}

	sub clearClient
	{
	my $self = shift;

	$self->{cipherc} = "";
	$self->{flight} = 0;
	$self->{record_list} = [];
	$self->{message_list} = [];
	$self->{clientflags} = "";
	$self->{sessionfile} = undef;
	$is_tls13 = 0;
	$ciphersuite = undef;

	TLSProxy::Message->clear();
	TLSProxy::Record->clear();
	}

	sub clear
	{
	my $self = shift;

	$self->clearClient;
	$self->{ciphers} = "AES128-SHA:TLS13-AES-128-GCM-SHA256";
	$self->{serverflags} = "";
	$self->{serverconnects} = 1;
	$self->{serverpid} = 0;
	$self->{reneg} = 0;
	}

	sub restart
	{
	my $self = shift;

	$self->clear;
	$self->start;
	}

	sub clientrestart
	{
	my $self = shift;

	$self->clear;
	$self->clientstart;
	}

	sub start
	{
	my ($self) = shift;
	my $pid;

	$pid = fork();
	if ($pid == 0) {
	if (!$self->debug) {
	open(STDOUT, ">", File::Spec->devnull())
	or die "Failed to redirect stdout: $!";
	open(STDERR, ">&STDOUT");
	}
	my $execcmd = $self->execute
	." s_server -no_comp -rev -engine ossltest -accept "
	.($self->server_port)
	." -cert ".$self->cert." -cert2 ".$self->cert
	." -naccept ".$self->serverconnects;
	if ($self->ciphers ne "") {
	$execcmd .= " -cipher ".$self->ciphers;
	}
	if ($self->serverflags ne "") {
	$execcmd .= " ".$self->serverflags;
	}
	exec($execcmd);
	}
	$self->serverpid($pid);

	return $self->clientstart;
	}

	sub clientstart
	{
	my ($self) = shift;
	my $oldstdout;

	if(!$self->debug) {
	open DEVNULL, ">", File::Spec->devnull();
	$oldstdout = select(DEVNULL);
	}

	# Create the Proxy socket
	my $proxaddr = $self->proxy_addr;
	$proxaddr =~ s/[\[\]]//g; # Remove [ and ]
	my $proxy_sock = $IP_factory->(
	LocalHost => $proxaddr,
	LocalPort => $self->proxy_port,
	Proto => "tcp",
	Listen => SOMAXCONN,
	ReuseAddr => 1
	);

	if ($proxy_sock) {
	print "Proxy started on port ".$self->proxy_port."\n";
	} else {
	warn "Failed creating proxy socket (".$proxaddr.",".$self->proxy_port."): $!\n";
	return 0;
	}

	if ($self->execute) {
	my $pid = fork();
	if ($pid == 0) {
	if (!$self->debug) {
	open(STDOUT, ">", File::Spec->devnull())
	or die "Failed to redirect stdout: $!";
	open(STDERR, ">&STDOUT");
	}
	my $echostr;
	if ($self->reneg()) {
	$echostr = "R";
	} else {
	$echostr = "test";
	}
	my $execcmd = "echo ".$echostr." \| ".$self->execute
	." s_client -engine ossltest -connect "
	.($self->proxy_addr).":".($self->proxy_port);
	if ($self->cipherc ne "") {
	$execcmd .= " -cipher ".$self->cipherc;
	}
	if ($self->clientflags ne "") {
	$execcmd .= " ".$self->clientflags;
	}
	if (defined $self->sessionfile) {
	$execcmd .= " -ign_eof";
	}
	exec($execcmd);
	}
	}

	# Wait for incoming connection from client
	my $client_sock;
	if(!($client_sock = $proxy_sock->accept())) {
	warn "Failed accepting incoming connection: $!\n";
	return 0;
	}

	print "Connection opened\n";

	# Now connect to the server
	my $retry = 3;
	my $server_sock;
	#We loop over this a few times because sometimes s_server can take a while
	#to start up
	do {
	my $servaddr = $self->server_addr;
	$servaddr =~ s/[\[\]]//g; # Remove [ and ]
	eval {
	$server_sock = $IP_factory->(
	PeerAddr => $servaddr,
	PeerPort => $self->server_port,
	MultiHomed => 1,
	Proto => 'tcp'
	);
	};

	$retry--;
	#Some buggy IP factories can return a defined server_sock that hasn't
	#actually connected, so we check peerport too
	if ($@ \|\| !defined($server_sock) \|\| !defined($server_sock->peerport)) {
	$server_sock->close() if defined($server_sock);
	undef $server_sock;
	if ($retry) {
	#Sleep for a short while
	select(undef, undef, undef, 0.1);
	} else {
	warn "Failed to start up server (".$servaddr.",".$self->server_port."): $!\n";
	return 0;
	}
	}
	} while (!$server_sock);

	my $sel = IO::Select->new($server_sock, $client_sock);
	my $indata;
	my @handles = ($server_sock, $client_sock);

	#Wait for either the server socket or the client socket to become readable
	my @ready;
	my $ctr = 0;
	while( (!(TLSProxy::Message->end)
	\|\| (defined $self->sessionfile()
	&& (-s $self->sessionfile()) == 0))
	&& $ctr < 10
	&& (@ready = $sel->can_read(1))) {
	foreach my $hand (@ready) {
	if ($hand == $server_sock) {
	$server_sock->sysread($indata, 16384) or goto END;
	$indata = $self->process_packet(1, $indata);
	$client_sock->syswrite($indata);
	$ctr = 0;
	} elsif ($hand == $client_sock) {
	$client_sock->sysread($indata, 16384) or goto END;
	$indata = $self->process_packet(0, $indata);
	$server_sock->syswrite($indata);
	$ctr = 0;
	} else {
	$ctr++
	}
	}
	}

	die "No progress made" if $ctr >= 10;

	END:
	print "Connection closed\n";
	if($server_sock) {
	$server_sock->close();
	}
	if($client_sock) {
	#Closing this also kills the child process
	$client_sock->close();
	}
	if($proxy_sock) {
	$proxy_sock->close();
	}
	if(!$self->debug) {
	select($oldstdout);
	}
	$self->serverconnects($self->serverconnects - 1);
	if ($self->serverconnects == 0) {
	die "serverpid is zero\n" if $self->serverpid == 0;
	print "Waiting for server process to close: "
	.$self->serverpid."\n";
	waitpid( $self->serverpid, 0);
	die "exit code $? from server process\n" if $? != 0;
	}
	return 1;
	}

	sub process_packet
	{
	my ($self, $server, $packet) = @_;
	my $len_real;
	my $decrypt_len;
	my $data;
	my $recnum;

	if ($server) {
	print "Received server packet\n";
	} else {
	print "Received client packet\n";
	}

	print "Packet length = ".length($packet)."\n";
	print "Processing flight ".$self->flight."\n";

	#Return contains the list of record found in the packet followed by the
	#list of messages in those records
	my @ret = TLSProxy::Record->get_records($server, $self->flight, $packet);
	push @{$self->record_list}, @{$ret[0]};
	push @{$self->{message_list}}, @{$ret[1]};

	print "\n";

	#Finished parsing. Call user provided filter here
	if(defined $self->filter) {
	$self->filter->($self);
	}

	#Reconstruct the packet
	$packet = "";
	foreach my $record (@{$self->record_list}) {
	#We only replay the records for the current flight
	if ($record->flight != $self->flight) {
	next;
	}
	$packet .= $record->reconstruct_record($server);
	}

	$self->{flight} = $self->{flight} + 1;

	print "Forwarded packet length = ".length($packet)."\n\n";

	return $packet;
	}

	#Read accessors
	sub execute
	{
	my $self = shift;
	return $self->{execute};
	}
	sub cert
	{
	my $self = shift;
	return $self->{cert};
	}
	sub debug
	{
	my $self = shift;
	return $self->{debug};
	}
	sub flight
	{
	my $self = shift;
	return $self->{flight};
	}
	sub record_list
	{
	my $self = shift;
	return $self->{record_list};
	}
	sub success
	{
	my $self = shift;
	return $self->{success};
	}
	sub end
	{
	my $self = shift;
	return $self->{end};
	}
	sub supports_IPv6
	{
	my $self = shift;
	return $have_IPv6;
	}

	#Read/write accessors
	sub proxy_addr
	{
	my $self = shift;
	if (@_) {
	$self->{proxy_addr} = shift;
	}
	return $self->{proxy_addr};
	}
	sub proxy_port
	{
	my $self = shift;
	if (@_) {
	$self->{proxy_port} = shift;
	}
	return $self->{proxy_port};
	}
	sub server_addr
	{
	my $self = shift;
	if (@_) {
	$self->{server_addr} = shift;
	}
	return $self->{server_addr};
	}
	sub server_port
	{
	my $self = shift;
	if (@_) {
	$self->{server_port} = shift;
	}
	return $self->{server_port};
	}
	sub filter
	{
	my $self = shift;
	if (@_) {
	$self->{filter} = shift;
	}
	return $self->{filter};
	}
	sub cipherc
	{
	my $self = shift;
	if (@_) {
	$self->{cipherc} = shift;
	}
	return $self->{cipherc};
	}
	sub ciphers
	{
	my $self = shift;
	if (@_) {
	$self->{ciphers} = shift;
	}
	return $self->{ciphers};
	}
	sub serverflags
	{
	my $self = shift;
	if (@_) {
	$self->{serverflags} = shift;
	}
	return $self->{serverflags};
	}
	sub clientflags
	{
	my $self = shift;
	if (@_) {
	$self->{clientflags} = shift;
	}
	return $self->{clientflags};
	}
	sub serverconnects
	{
	my $self = shift;
	if (@_) {
	$self->{serverconnects} = shift;
	}
	return $self->{serverconnects};
	}
	# This is a bit ugly because the caller is responsible for keeping the records
	# in sync with the updated message list; simply updating the message list isn't
	# sufficient to get the proxy to forward the new message.
	# But it does the trick for the one test (test_sslsessiontick) that needs it.
	sub message_list
	{
	my $self = shift;
	if (@_) {
	$self->{message_list} = shift;
	}
	return $self->{message_list};
	}
	sub serverpid
	{
	my $self = shift;
	if (@_) {
	$self->{serverpid} = shift;
	}
	return $self->{serverpid};
	}

	sub fill_known_data
	{
	my $length = shift;
	my $ret = "";
	for (my $i = 0; $i < $length; $i++) {
	$ret .= chr($i);
	}
	return $ret;
	}

	sub is_tls13
	{
	my $class = shift;
	if (@_) {
	$is_tls13 = shift;
	}
	return $is_tls13;
	}

	sub reneg
	{
	my $self = shift;
	if (@_) {
	$self->{reneg} = shift;
	}
	return $self->{reneg};
	}

	#Setting a sessionfile means that the client will not close until the given
	#file exists. This is useful in TLSv1.3 where otherwise s_client will close
	#immediately at the end of the handshake, but before the session has been
	#received from the server. A side effect of this is that s_client never sends
	#a close_notify, so instead we consider success to be when it sends application
	#data over the connection.
	sub sessionfile
	{
	my $self = shift;
	if (@_) {
	$self->{sessionfile} = shift;
	TLSProxy::Message->successondata(1);
	}
	return $self->{sessionfile};
	}

	sub ciphersuite
	{
	my $class = shift;
	if (@_) {
	$ciphersuite = shift;
	}
	return $ciphersuite;
	}

	1;