use Config;

use File::Basename qw(&basename &dirname);

use Cwd;

my $origdir = cwd;

chdir dirname($0);

my $file = basename($0, '.PL');

$file .= '.com' if $^O eq 'VMS';

open OUT,">$file" or die "Can't create $file: $!";

print "Extracting $file (with variable substitutions)\n";

print OUT <<"!GROK!THIS!";

$Config{startperl}

eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'

if \$running_under_some_shell;

!GROK!THIS!

print OUT <<'!NO!SUBS!';

use strict;

use IO::File;

use Getopt::Std;

use ExtUtils::MakeMaker qw(prompt);

use File::Spec;

use vars qw($opt_d $opt_c $opt_h $opt_o $opt_i);

my %cfg = ();

my @cfg = ();

my($libnet_cfg_in,$libnet_cfg_out,$msg,$ans,$def,$have_old);

sub valid_host

{

my $h = shift;

defined($h) && (($cfg{'test_exist'} == 0) || gethostbyname($h));

}

sub test_hostnames (\@)

{

my $hlist = shift;

my @h = ();

my $host;

my $err = 0;

foreach $host (@$hlist)

{

if(valid_host($host))

{

push(@h, $host);

next;

}

warn "Bad hostname: '$host'\n";

$err++;

}

@$hlist = @h;

$err ? join(" ",@h) : undef;

}

sub Prompt

{

my($prompt,$def) = @_;

$def = "" unless defined $def;

chomp($prompt);

if($opt_d)

{

print $prompt,," [",$def,"]\n";

return $def;

}

prompt($prompt,$def);

}

sub get_host_list

{

my($prompt,$def) = @_;

$def = join(" ",@$def) if ref($def);

my @hosts;

do

{

my $ans = Prompt($prompt,$def);

$ans =~ s/(\A\s+|\s+\Z)//g;

@hosts = split(/\s+/, $ans);

}

while(@hosts && defined($def = test_hostnames(@hosts)));

\@hosts;

}

sub get_hostname

{

my($prompt,$def) = @_;

my $host;

while(1)

{

my $ans = Prompt($prompt,$def);

$host = ($ans =~ /(\S*)/)[0];

last

if(!length($host) || valid_host($host));

$def =""

if $def eq $host;

print <<"EDQ";

*** ERROR:

Hostname `$host' does not seem to exist, please enter again

or a single space to clear any default

}

length $host

? $host

: undef;

}

sub get_bool ($$)

{

my($prompt,$def) = @_;

chomp($prompt);

my $val = Prompt($prompt,$def ? "yes" : "no");

$val =~ /^y/i ? 1 : 0;

}

sub get_netmask ($$)

{

my($prompt,$def) = @_;

chomp($prompt);

my %list;

@list{@$def} = ();

MASK:

while(1) {

my $bad = 0;

my $ans = Prompt($prompt) or last;

if($ans eq '*') {

%list = ();

next;

}

if($ans eq '=') {

print "\n",( %list ? join("\n", sort keys %list) : 'none'),"\n\n";

next;

}

unless ($ans =~ m{^\s*(?:(-?\s*)(\d+(?:\.\d+){0,3})/(\d+))}) {

warn "Bad netmask '$ans'\n";

next;

}

my($remove,$bits,@ip) = ($1,$3,split(/\./, $2),0,0,0);

if ( $ip[0] < 1 || $bits < 1 || $bits > 32) {

warn "Bad netmask '$ans'\n";

next MASK;

}

foreach my $byte (@ip) {

if ( $byte > 255 ) {

warn "Bad netmask '$ans'\n";

next MASK;

}

}

my $mask = sprintf("%d.%d.%d.%d/%d",@ip[0..3],$bits);

if ($remove) {

delete $list{$mask};

}

else {

$list{$mask} = 1;

}

}

[ keys %list ];

}

sub default_hostname

{

my $host;

my @host;

foreach $host (@_)

{

if(defined($host) && valid_host($host))

{

return $host

unless wantarray;

push(@host,$host);

}

}

return wantarray ? @host : undef;

}

getopts('dcho:i:');

$libnet_cfg_in = "libnet.cfg"

unless(defined($libnet_cfg_in = $opt_i));

$libnet_cfg_out = "libnet.cfg"

unless(defined($libnet_cfg_out = $opt_o));

my %oldcfg = ();

$Net::Config::CONFIGURE = 1; # Suppress load of user overrides

if( -f $libnet_cfg_in )

{

%oldcfg = ( %{ do $libnet_cfg_in } );

}

elsif (eval { require Net::Config })

{

$have_old = 1;

%oldcfg = %Net::Config::NetConfig;

}

map { $cfg{lc $_} = $cfg{$_}; delete $cfg{$_} if /[A-Z]/ } keys %cfg;

if ($opt_h) {

print <<EOU;

$0: Usage: $0 [-c] [-d] [-i oldconfigile] [-o newconfigfile] [-h]

Without options, the old configuration is shown.

-c change the configuration

-d use defaults from the old config (implies -c, non-interactive)

-i use a specific file as the old config file

-o use a specific file as the new config file

-h show this help

The default name of the old configuration file is by default

"libnet.cfg", unless otherwise specified using the -i option,

C<-i oldfile>, and it is searched first from the current directory,

and then from your module path.

The default name of the new configuration file is "libnet.cfg", and by

default it is written to the current directory, unless otherwise

specified using the -o option.

exit(0);

}

{

my $oldcfgfile;

my @inc;

push @inc, $ENV{PERL5LIB} if exists $ENV{PERL5LIB};

push @inc, $ENV{PERLLIB} if exists $ENV{PERLLIB};

push @inc, @INC;

for (@inc) {

my $trycfgfile = File::Spec->catfile($_, $libnet_cfg_in);

if (-f $trycfgfile && -r $trycfgfile) {

$oldcfgfile = $trycfgfile;

last;

}

}

print "# old config $oldcfgfile\n" if defined $oldcfgfile;

for (sort keys %oldcfg) {

printf "%-20s %s\n", $_,

ref $oldcfg{$_} ? @{$oldcfg{$_}} : $oldcfg{$_};

}

unless ($opt_c || $opt_d) {

print "# $0 -h for help\n";

exit(0);

}

}

$oldcfg{'test_exist'} = 1 unless exists $oldcfg{'test_exist'};

$oldcfg{'test_hosts'} = 1 unless exists $oldcfg{'test_hosts'};

if($have_old && !$opt_d)

{

$msg = <<EDQ;

Ah, I see you already have installed libnet before.

Do you want to modify/update your configuration (y|n) ?

$opt_d = 1

unless get_bool($msg,0);

}

$msg = <<EDQ;

This script will prompt you to enter hostnames that can be used as

defaults for some of the modules in the libnet distribution.

To ensure that you do not enter an invalid hostname, I can perform a

lookup on each hostname you enter. If your internet connection is via

a dialup line then you may not want me to perform these lookups, as

it will require you to be on-line.

Do you want me to perform hostname lookups (y|n) ?

$cfg{'test_exist'} = get_bool($msg, $oldcfg{'test_exist'});

print <<EDQ unless $cfg{'test_exist'};

*** WARNING *** WARNING *** WARNING *** WARNING *** WARNING ***

OK I will not check if the hostnames you give are valid

so be very cafeful

*** WARNING *** WARNING *** WARNING *** WARNING *** WARNING ***

print <<EDQ;

The following questions all require a list of host names, separated

with spaces. If you do not have a host available for any of the

services, then enter a single space, followed by <CR>. To accept the

default, hit <CR>

$msg = 'Enter a list of available NNTP hosts :';

$def = $oldcfg{'nntp_hosts'} ||

[ default_hostname($ENV{NNTPSERVER},$ENV{NEWSHOST},'news') ];

$cfg{'nntp_hosts'} = get_host_list($msg,$def);

$msg = 'Enter a list of available SMTP hosts :';

$def = $oldcfg{'smtp_hosts'} ||

[ default_hostname(split(/:/,$ENV{SMTPHOSTS} || ""), 'mailhost') ];

$cfg{'smtp_hosts'} = get_host_list($msg,$def);

$msg = 'Enter a list of available POP3 hosts :';

$def = $oldcfg{'pop3_hosts'} || [];

$cfg{'pop3_hosts'} = get_host_list($msg,$def);

$msg = 'Enter a list of available SNPP hosts :';

$def = $oldcfg{'snpp_hosts'} || [];

$cfg{'snpp_hosts'} = get_host_list($msg,$def);

$msg = 'Enter a list of available PH Hosts :' ;

$def = $oldcfg{'ph_hosts'} ||

[ default_hostname('dirserv') ];

$cfg{'ph_hosts'} = get_host_list($msg,$def);

$msg = 'Enter a list of available TIME Hosts :' ;

$def = $oldcfg{'time_hosts'} || [];

$cfg{'time_hosts'} = get_host_list($msg,$def);

$msg = 'Enter a list of available DAYTIME Hosts :' ;

$def = $oldcfg{'daytime_hosts'} || $oldcfg{'time_hosts'};

$cfg{'daytime_hosts'} = get_host_list($msg,$def);

$msg = <<EDQ;

Do you have a firewall/ftp proxy between your machine and the internet

If you use a SOCKS firewall answer no

(y|n) ?

if(get_bool($msg,0)) {

$msg = <<'EDQ';

What series of FTP commands do you need to send to your

firewall to connect to an external host.

user/pass => external user & password

fwuser/fwpass => firewall user & password

0) None

1) -----------------------

USER user@remote.host

PASS pass

2) -----------------------

USER fwuser

PASS fwpass

USER user@remote.host

PASS pass

3) -----------------------

USER fwuser

PASS fwpass

SITE remote.site

USER user

PASS pass

4) -----------------------

USER fwuser

PASS fwpass

OPEN remote.site

USER user

PASS pass

5) -----------------------

USER user@fwuser@remote.site

PASS pass@fwpass

6) -----------------------

USER fwuser@remote.site

PASS fwpass

USER user

PASS pass

7) -----------------------

USER user@remote.host

PASS pass

AUTH fwuser

RESP fwpass

Choice:

$def = exists $oldcfg{'ftp_firewall_type'} ? $oldcfg{'ftp_firewall_type'} : 1;

$ans = Prompt($msg,$def);

$cfg{'ftp_firewall_type'} = 0+$ans;

$def = $oldcfg{'ftp_firewall'} || $ENV{FTP_FIREWALL};

$cfg{'ftp_firewall'} = get_hostname("FTP proxy hostname :", $def);

}

else {

delete $cfg{'ftp_firewall'};

}

if (defined $cfg{'ftp_firewall'})

{

print <<EDQ;

By default Net::FTP assumes that it only needs to use a firewall if it

cannot resolve the name of the host given. This only works if your DNS

system is setup to only resolve internal hostnames. If this is not the

case and your DNS will resolve external hostnames, then another method

is needed. Net::Config can do this if you provide the netmasks that

describe your internal network. Each netmask should be entered in the

form x.x.x.x/y, for example 127.0.0.0/8 or 214.8.16.32/24

$def = [];

if(ref($oldcfg{'local_netmask'}))

{

$def = $oldcfg{'local_netmask'};

print "Your current netmasks are :\n\n\t",

join("\n\t",@{$def}),"\n\n";

}

print "

Enter one netmask at each prompt, prefix with a - to remove a netmask

from the list, enter a '*' to clear the whole list, an '=' to show the

current list and an empty line to continue with Configure.

my $mask = get_netmask("netmask :",$def);

$cfg{'local_netmask'} = $mask if ref($mask) && @$mask;

}

print <<EDQ;

Normally when FTP needs a data connection the client tells the server

a port to connect to, and the server initiates a connection to the client.

Some setups, in particular firewall setups, can/do not work using this

protocol. In these situations the client must make the connection to the

server, this is called a passive transfer.

if (defined $cfg{'ftp_firewall'}) {

$msg = "\nShould all FTP connections via a firewall/proxy be passive (y|n) ?";

$def = $oldcfg{'ftp_ext_passive'} || 0;

$cfg{'ftp_ext_passive'} = get_bool($msg,$def);

$msg = "\nShould all other FTP connections be passive (y|n) ?";

}

else {

$msg = "\nShould all FTP connections be passive (y|n) ?";

}

$def = $oldcfg{'ftp_int_passive'} || 0;

$cfg{'ftp_int_passive'} = get_bool($msg,$def);

$def = $oldcfg{'inet_domain'} || $ENV{LOCALDOMAIN};

$ans = Prompt("\nWhat is your local internet domain name :",$def);

$cfg{'inet_domain'} = ($ans =~ /(\S+)/)[0];

$msg = <<EDQ;

If you specified some default hosts above, it is possible for me to

do some basic tests when you run `make test'

This will cause `make test' to be quite a bit slower and, if your

internet connection is via dialup, will require you to be on-line

unless the hosts are local.

Do you want me to run these tests (y|n) ?

$cfg{'test_hosts'} = get_bool($msg,$oldcfg{'test_hosts'});

$msg = <<EDQ;

To allow Net::FTP to be tested I will need a hostname. This host

should allow anonymous access and have a /pub directory

What host can I use :

$cfg{'ftp_testhost'} = get_hostname($msg,$oldcfg{'ftp_testhost'})

if $cfg{'test_hosts'};

print "\n";

my $fh = IO::File->new($libnet_cfg_out, "w") or

die "Cannot create `$libnet_cfg_out': $!";

print "Writing $libnet_cfg_out\n";

print $fh "{\n";

my $key;

foreach $key (keys %cfg) {

my $val = $cfg{$key};

if(!defined($val)) {

$val = "undef";

}

elsif(ref($val)) {

$val = '[' . join(",",

map {

my $v = "undef";

if(defined $_) {

($v = $_) =~ s/'/\'/sog;

$v = "'" . $v . "'";

}

$v;

} @$val ) . ']';

}

else {

$val =~ s/'/\'/sog;

$val = "'" . $val . "'" if $val =~ /\D/;

}

print $fh "\t'",$key,"' => ",$val,",\n";

}

print $fh "}\n";

$fh->close;

exit 0;

!NO!SUBS!

close OUT or die "Can't close $file: $!";

chmod 0755, $file or die "Can't reset permissions for $file: $!\n";

exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';

chdir $origdir;