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# cygwin-lib.pl
# Networking functions for cygwin
#
# TODO:
# * detect when netsh isn't available
# * save domain list
# * save domainname
my $logfile = "/dev/null";
#my $logfile = "/tmp/debugwb";
#define variables that modify the behavior of the .cgi scripts
#that are different than any other OS.
$noos_support_add_ifcs = 1; #Windows doesn't supporting adding interfaces
$noos_support_delete_ifcs = 1; #Windows doesn't supporting deleting interfaces
$always_apply_ifcs = 1; #Changes made to interfaces are always applied
$routes_active_now = 1; #Changes made to routes are always applied
#Note: some changes Windows requires a reboot, some don't.
#TODO2: determine which changes require a reboot.
# active_interfaces()
# Returns a list of currently ifconfig'd interfaces
# ifc keys: 'name','fullname','virtual','address','netmask','broadcast',
# 'ether','mtu','up','edit','index','dhcp'
sub active_interfaces
{
local(@rv, @lines, $line);
&open_execute_command(IFC, "ipconfig /all", 1, 1);
while (<IFC>) {
s/\r|\n//g;
push(@lines, $_);
}
close(IFC);
#Need to get the list of boottime interfaces, because ipconfig /all
#doesn't return ipaddr if cable is disconnected
my @bootifs = boot_interfaces();
my %ifc = ();
foreach $line (@lines) {
if ($line =~ /Ethernet adapter (.*):/) {
my $name = $1;
if (defined($ifc{'name'})) {
#save the previous one
$ifc{'index'} = scalar(@rv);
local ($a1, $a2, $a3, $a4) = ($1, $2, $3, $4);
if ($ifc{'address'}) {
$ifc{'netmask'} =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/;
$ifc{'broadcast'} = sprintf("%d.%d.%d.%d",
($a1 | ~int($1))&0xff,
($a2 | ~int($2))&0xff,
($a3 | ~int($3))&0xff,
($a4 | ~int($4))&0xff);
}
my %tmp = %ifc;
push(@rv, \%tmp);
}
%ifc = ();
$ifc{'name'} = $ifc{'fullname'} = $name;
}
elsif ($line =~ /Media State.*: (.*)/) {
$ifc{'up'} = ($1 !~ /Disconnected/);
foreach (@bootifs) {
if ($_->{'name'} eq $ifc{'name'}) {
$ifc{'dhcp'} = $_->{'dhcp'};
$ifc{'address'} = $_->{'address'};
$ifc{'netmask'} = $_->{'netmask'};
}
}
}
elsif ($line =~ /Description.*: (.*) \#(\d+)\s*$/) {
$ifc{'desc'} = $1;
$ifc{'index'} = $2;
}
elsif ($line =~ /Description.*: (.*)$/) {
$ifc{'desc'} = $1;
chop($ifc{'desc'});
$ifc{'num'} = 1;
}
elsif ($line =~ /Physical Address.*: (.+)$/) {
$ifc{'ether'} = $1;
$ifc{'ether'} =~ s/-/:/g;
}
elsif ($line =~ /IP Address.*: (.+)$/) {
$ifc{'address'} = $1;
$ifc{'up'} = 1 if ! defined $ifc{'up'};
}
elsif ($line =~ /Subnet Mask.*: (.+)$/) {
$ifc{'netmask'} = $1;
}
elsif ($line =~ /Default Gateway.*: (.+)$/) {
#this is used for the router subroutines below
$ifc{'gateway'} = $1;
}
elsif ($line =~ /DHCP Enabled.*: (.+)$/) {
$ifc{'dhcp'} = ($1 =~ /Yes/);
}
}
if (defined($ifc{'name'})) {
#save the last one
$ifc{'index'} = scalar(@rv);
local ($a1, $a2, $a3, $a4) = ($1, $2, $3, $4);
if ($ifc{'address'}) {
$ifc{'netmask'} =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/;
$ifc{'broadcast'} = sprintf("%d.%d.%d.%d",
($a1 | ~int($1))&0xff,
($a2 | ~int($2))&0xff,
($a3 | ~int($3))&0xff,
($a4 | ~int($4))&0xff);
}
my %tmp = %ifc;
push(@rv, \%tmp);
}
return @rv;
}
# activate_interface(&details)
# Create or modify an interface
sub activate_interface
{
save_interface($@);
#Windows doesn't support adding or removing interfaces
}
# apply_interface(&details)
# Save changes to an interface active now
sub apply_interface
{
save_interface($@);
}
# deactivate_interface(&details)
# Deactive an interface
sub deactivate_interface
{
#TODO2: determine how to deactivate an interface
}
# boot_interfaces()
# Returns a list of interfaces brought up at boot time
sub boot_interfaces
{
my @rv = ();
#It doesn't seem to really help to display the loopback since
#there's no mechanism in Windows to edit it.
# push(@rv, { 'name' => 'lo0',
# 'fullname' => 'lo0',
# 'address' => '127.0.0.1',
# 'netmask' => '255.0.0.0',
# 'up' => 1,
# 'edit' => 0 });
my (@lines, $l);
&open_execute_command(IFC, "netsh interface ip dump", 1);
while (<IFC>) {
s/\r|\n//g;
push(@lines, $_);
}
close(IFC);
#my %ifc = ();
foreach $l (@lines) {
#TODO2: handle this message:
#"Cannot access configuration.
# Connection UI or someone else is accessing it."
if ($l =~ /^set address name = "(.*)" source = dhcp/) {
local %ifc;
$ifc{'fullname'} = $ifc{'name'} = $1;
$ifc{'index'} = scalar(@rv);
$ifc{'edit'}++;
$ifc{'dhcp'} = 1;
$ifc{'up'} = 1;
push(@rv, \%ifc);
} elsif ($l =~ /^set address name = "(.*)" source = static addr = ([\d\.]+) mask = ([\d\.]+)/) {
local %ifc;
$ifc{'fullname'} = $ifc{'name'} = $1;
$ifc{'address'} = $2;
$ifc{'netmask'} = $3;
$ifc{'index'} = scalar(@rv);
$ifc{'edit'}++;
$ifc{'address'} =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/;
local ($a1, $a2, $a3, $a4) = ($1, $2, $3, $4);
$ifc{'netmask'} =~ /(\d+)\.(\d+)\.(\d+)\.(\d+)/;
$ifc{'broadcast'} = sprintf("%d.%d.%d.%d",
($a1 | ~int($1))&0xff,
($a2 | ~int($2))&0xff,
($a3 | ~int($3))&0xff,
($a4 | ~int($4))&0xff);
$ifc{'dhcp'} = 0;
$ifc{'up'} = 1;
push(@rv, \%ifc);
} elsif ($l =~ /^set address name = "(.*)" gateway = ([\d\.]+) gwmetric = (\d)/) {
foreach (@rv) {
if ($_->{'name'} eq $1) {
$_->{'gateway'} = $2;
$_->{'gwmetric'} = $3;
}
}
}
}
return @rv;
}
# save_interface(&details)
# Create or update a boot-time interface
sub save_interface
{
my $ifc = $_[0];
my $cmd = "netsh interface ip set address name = \"" .
"$ifc->{'name'}\" source = ";
if ($ifc->{'dhcp'}) {
$cmd .= "dhcp";
} else {
$cmd .= "static addr = $ifc->{'address'} mask = $ifc->{'netmask'}";
}
system_logged("$cmd >$logfile 2>&1");
}
# delete_interface(&details)
# Delete a boot-time interface
sub delete_interface
{
#Windows doesn't support adding or removing interfaces
}
# iface_type(name)
# Returns a human-readable interface type name
sub iface_type
{
#TODO2
#return "Fast Ethernet" if
#return "Token Ring" if
#return "PPP" if
return "Loopback" if $_[0] =~ /^lo0$/;
return "Ethernet";
}
# iface_hardware(name)
# Does some interface have an editable hardware address
sub iface_hardware
{
#TODO2: PPP
return $_[0] !~ /^(lo\d)$/;
}
# can_edit(what)
# Can some boot-time interface parameter be edited?
sub can_edit
{
return $_[0] =~ /^(dhcp|netmask)$/;
}
# valid_boot_address(address)
# Is some address valid for a bootup interface
sub valid_boot_address
{
return &to_ipaddress($_[0]) ? 1 : 0;
}
# get_dns_config()
# Returns a hashtable containing keys nameserver, domain, order
sub get_dns_config
{
my @lines = ();
my $dns = {'domain' => []};
my $i = 0;
if (&open_execute_command(CMD, "ipconfig /all", 1)) {
my $doing_domain = 0;
while (<CMD>) {
s/[\n\r]//g;
if ($doing_domain) {
if (/(Ethernet adapter|:)/) {
$doing_domain = 0;
} elsif (/^\s*([^:]+\.[^:]+)$/) {
push(@{$dns->{"domain"}}, $1);
}
}
if (/Primary DNS Suffix.*: (.*)/) {
push(@{$dns->{"domain"}}, $1);
} elsif (/DNS Suffix Search List.*: (.*)/) {
$doing_domain = 1;
push(@{$dns->{"domain"}}, $1);
} elsif (/^Ethernet adapter (.*):/) {
$dns->{"name"}[$i++] = $1;
}
}
close(CMD);
}
if (&open_execute_command(CMD, "netsh interface ip show dns", 1)) {
my $doing_nameserver = 0;
my $i = -1;
my $key = "nameserver";
while (<CMD>) {
s/\r|\n//g;
if ($doing_nameserver) {
if (/(Configuration for interface|:)/) {
$doing_nameserver = 0;
} elsif (/^\s*([\d\.]+)/) {
push(@{$dns->{$key}}, $1);
}
}
if (/Configuration for interface "(.*)"/) {
$dns->{'name'}[++$i] = $1;
$key = "nameserver";
$key .= $i if $i > 0;
} elsif (/Statically Configured DNS Servers:\s*([\d\.]+)/) {
push(@{$dns->{$key}}, $1);
$doing_nameserver = 1;
}
}
close(CMD);
}
return $dns;
}
# save_dns_config(&config)
# Configures the DNS settings
sub save_dns_config
{
my $dns = $_[0];
for ($i=0; $i < @{$dns->{'name'}}; $i++) {
my $key = "nameserver";
$key .= $i if $i > 0;
if (@{$dns->{$key}}) {
my $cmd_fmt = "netsh interface ip %s dns name = \"" .
$dns->{'name'}[$i] . "\"%s addr = %s";
my $addr = pop(@{$dns->{$key}});
my $cmd = sprintf($cmd_fmt, "set", " source = static", $addr);
&system_logged("$cmd >$logfile 2>&1");
#add the new ones (any old list of adds was erased by the set cmd)
foreach (@{$dns->{$key}}) {
$cmd = sprintf($cmd_fmt, "add", "", $_);
&system_logged("$cmd >$logfile 2>&1");
}
} else {
#set it to be obtained automatically
my $cmd = "netsh interface ip set dns name = \"" .
$dns->{'name'}[$i] . "\" source = dhcp";
&system_logged("$cmd >$logfile 2>&1");
#any old list of adds was erased by the set cmd
}
}
#TODO: support saving the domain list
#if ($_[0]->{'domain'}) {
}
$max_dns_servers = 16; #more is possible, but this is realistic
# order_input(&dns)
# Returns HTML for selecting the name resolution order
sub order_input
{
#TODO2
}
# parse_order(&dns)
# Parses the form created by order_input()
sub parse_order
{
#TODO2
}
# get_hostname()
sub get_hostname
{
return &get_system_hostname();
}
# save_hostname(name)
sub save_hostname
{
&system_logged("hostname $_[0] >/dev/null 2>&1");
undef(@main::get_system_hostname); # clear cache
}
# get_domainname()
sub get_domainname
{
#TODO: determine how to get
return "";
}
# save_domainname(domain)
sub save_domainname
{
#TODO: determine how to set
}
sub routing_config_files
{
return map { $_->{'file'} } &boot_interfaces();
}
sub routing_input
{
# show default router(s) input
my @if = boot_interfaces();
my $i = 0;
foreach (@if) {
next if $_->{'address'} eq "127.0.0.1";
my $none_or_dhcp = defined($ifc{'gateway'}) ? 0 : 1;
my $desc = $_->{'name'} . ($_->{'dhcp'}? "" : " ($_->{'address'})");
print &ui_table_row("$desc $text{'routes_default'}",
&ui_radio("gateway${i}_def", $none_or_dhcp,
[ [ 1, $text{'routes_none'} ],
[ 0, $text{'routes_gateway'}." ".
&ui_textbox("gateway$i", $_->{'gateway'}, 15)." ".
$text{'routes_gwmetric'}." ".
&ui_textbox("gwmetric$i", $_->{'gwmetric'}, 4) ] ]).
&ui_hidden("ifname${i}", $_->{'name'}));
$i++;
}
}
sub parse_routing
{
my $i = 0;
my @if = boot_interfaces();
while (defined($in{"gateway${i}_def"})) {
my $name = $in{"ifname$i"};
my $gateway = $in{"gateway$i"};
my $gwmetric = $in{"gwmetric$i"};
foreach (@if) {
if ($_->{'name'} eq $name) {
if (! $in{"gateway${i}_def"}) {
if ($gateway != $_->{'gateway'} ||
$gwmetric != $_->{'gwmetric'}) {
&check_ipaddress($gateway) ||
&error(&text('routes_egateway', $gateway));
my $cmd = "netsh interface ip set address name = \"" .
$_->{'name'} . "\" gateway = $gateway " .
"gwmetric = $gwmetric";
system_logged("$cmd > $logfile 2>&1");
}
} else {
if (defined($_->{'gateway'})) {
my $cmd = "netsh interface ip delete address name = \""
. $_->{'name'} . "\" gateway = $_->{'gateway'}";
system_logged("$cmd > $logfile 2>&1");
}
}
}
}
$i++;
}
}
# supports_address6([&iface])
# Returns 1 if managing IPv6 interfaces is supported
sub supports_address6
{
local ($iface) = @_;
return 0;
}
1;
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