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package network::wireless;
use strict;
use common;
my $wpa_supplicant_conf = "/etc/wpa_supplicant.conf";
sub convert_wep_key_for_iwconfig {
#- 5 or 13 characters, consider the key as ASCII and prepend "s:"
#- else consider the key as hexadecimal, do not strip dashes
#- always quote the key as string
my ($real_key, $restricted) = @_;
my $key = member(length($real_key), (5, 13)) ? "s:$real_key" : $real_key;
$restricted ? "restricted $key" : "open $key";
}
sub get_wep_key_from_iwconfig {
#- strip "s:" if the key is 5 or 13 characters (ASCII)
#- else the key as hexadecimal, do not modify
my ($key) = @_;
$key =~ s/^s:// if member(length($key), (7,15));
my ($mode, $real_key) = $key =~ /^(?:(open|restricted)\s+)?(.*)$/;
($real_key, $mode eq 'restricted');
}
sub convert_key_for_wpa_supplicant {
my ($key) = @_;
if ($key =~ /^([[:xdigit:]]{4}[\:-]?)+[[:xdigit:]]{2,}$/) {
$key =~ s/[\:-]//g;
return lc($key);
} else {
return qq("$key");
}
}
sub wlan_ng_needed {
my ($module) = @_;
$module =~ /^prism2_/;
}
#- FIXME: to be improved (quotes, comments) and moved in common files
sub wlan_ng_update_vars {
my ($file, $vars) = @_;
substInFile {
while (my ($key, $value) = each(%$vars)) {
s/^#?\Q$key\E=(?:"[^#]*"|[^#\s]*)(\s*#.*)?/$key=$value$1/ and delete $vars->{$key};
}
$_ .= join('', map { "$_=$vars->{$_}\n" } keys %$vars) if eof;
} $file;
}
sub wlan_ng_configure {
my ($essid, $key, $device, $module) = @_;
my $wlan_conf_file = "$::prefix/etc/wlan/wlan.conf";
my @wlan_devices = split(/ /, (cat_($wlan_conf_file) =~ /^WLAN_DEVICES="(.*)"/m)[0]);
push @wlan_devices, $device unless member($device, @wlan_devices);
#- enable device and make it use the choosen ESSID
wlan_ng_update_vars($wlan_conf_file,
{
WLAN_DEVICES => qq("@wlan_devices"),
"SSID_$device" => qq("$essid"),
"ENABLE_$device" => "y"
});
my $wlan_ssid_file = "$::prefix/etc/wlan/wlancfg-$essid";
#- copy default settings for this ESSID if config file does not exist
-f $wlan_ssid_file or cp_f("$::prefix/etc/wlan/wlancfg-DEFAULT", $wlan_ssid_file);
#- enable/disable encryption
wlan_ng_update_vars($wlan_ssid_file,
{
(map { $_ => $key ? "true" : "false" } qw(lnxreq_hostWEPEncrypt lnxreq_hostWEPDecrypt dot11PrivacyInvoked dot11ExcludeUnencrypted)),
AuthType => $key ? qq("sharedkey") : qq("opensystem"),
if_($key,
dot11WEPDefaultKeyID => 0,
dot11WEPDefaultKey0 => qq("$key")
)
});
#- hide settings for non-root users
chmod 0600, $wlan_conf_file;
chmod 0600, $wlan_ssid_file;
#- apply settings on wlan interface
require services;
services::restart($module eq 'prism2_cs' ? 'pcmcia' : 'wlan');
}
sub wpa_supplicant_get_driver {
my ($module) = @_;
$module =~ /^hostap_/ ? "hostap" :
$module eq "prism54" ? "prism54" :
$module =~ /^ath_/ ? "madwifi" :
$module =~ /^at76c50|atmel_/ ? "atmel" :
$module eq "ndiswrapper" ? "ndiswrapper" :
"wext";
}
sub wpa_supplicant_add_network {
my ($essid, $enc_mode, $key) = @_;
my $conf = wpa_supplicant_read_conf();
my $network = {
ssid => qq("$essid"),
scan_ssid => 1,
$enc_mode eq 'wpa-psk' ?
(
psk => convert_key_for_wpa_supplicant($key),
) :
member($enc_mode, qw(open restricted)) ?
(
key_mgmt => 'NONE',
wep_key0 => convert_key_for_wpa_supplicant($key),
wep_tx_keyidx => 0,
auth_alg => 'SHARED',
) :
()
};
@$conf = difference2($conf, [ wpa_supplicant_find_similar($conf, $network) ]);
push @$conf, $network;
wpa_supplicant_write_conf($conf);
}
sub wpa_supplicant_find_similar {
my ($conf, $network) = @_;
grep {
my $current = $_;
any { exists $network->{$_} && $network->{$_} eq $current->{$_} } qw(ssid bssid);
} @$conf;
}
sub wpa_supplicant_read_conf() {
my @conf;
my $network;
foreach (cat_($::prefix . $wpa_supplicant_conf)) {
if ($network) {
#- in a "network = {}" block
if (/^\s*(\w+)=(.*?)(?:\s*#.*)?$/) {
$network->{$1} = $2;
} elsif (/^\}/) {
#- end of network block
push @conf, $network;
undef $network;
}
} elsif (/^\s*network={/) {
#- beginning of a new network block
$network = {};
}
}
\@conf;
}
sub wpa_supplicant_write_conf {
my ($conf) = @_;
my $buf;
my @conf = @$conf;
my $network;
foreach (cat_($::prefix . $wpa_supplicant_conf)) {
if ($network) {
#- in a "network = {}" block
if (/^\s*(\w+)=(.*)$/) {
push @{$network->{entries}}, { key => $1, value => $2 };
member($1, qw(ssid bssid)) and $network->{$1} = $2;
} elsif (/^\}/) {
#- end of network block, write it
$buf .= "network={$network->{comment}\n";
my $new_network = first(wpa_supplicant_find_similar(\@conf, $network));
foreach (@{$network->{entries}}) {
my $key = $_->{key};
if ($new_network) {
#- do not write entry if not provided in the new network
exists $new_network->{$key} or next;
#- update value from the new network
$_->{value} = delete $new_network->{$key};
}
$buf .= " ";
$buf .= "$key=$_->{value}" if $key;
$buf .= "$_->{comment}\n";
}
if ($new_network) {
#- write new keys
while (my ($key, $value) = each(%$new_network)) {
$buf .= " $key=$value\n";
}
}
$buf .= "}\n";
$new_network and @conf = grep { $_ != $new_network } @conf;
undef $network;
} else {
#- unrecognized, keep it anyway
push @{$network->{entries}}, { comment => $_ };
}
} else {
if (/^\s*network={/) {
#- beginning of a new network block
$network = {};
} else {
#- keep other options, comments
$buf .= $_;
}
}
}
#- write remaining networks
foreach (@conf) {
$buf .= "\nnetwork={\n";
while (my ($key, $value) = each(%$_)) {
$buf .= " $key=$value\n";
}
$buf .= "}\n";
}
output($::prefix . $wpa_supplicant_conf, $buf);
#- hide keys for non-root users
chmod 0600, $::prefix . $wpa_supplicant_conf;
}
1;
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