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|
package network;
use diagnostics;
use strict;
#-######################################################################################
#- misc imports
#-######################################################################################
use Socket;
use common qw(:common :file :system :functional);
use detect_devices;
use log;
#-######################################################################################
#- Functions
#-######################################################################################
sub read_conf {
my ($file) = @_;
my %netc = getVarsFromSh($file);
$netc{dnsServer} = $netc{NS0};
\%netc;
}
sub read_resolv_conf {
my ($file) = @_;
my %netc;
my @l;
local *F;
open F, $file or die "cannot open $file: $!";
foreach (<F>) {
push @l, $1 if (/^\s*nameserver\s+([^\s]+)/);
}
$netc{$_} = shift @l foreach qw(dnsServer dnsServer2 dnsServer3);
\%netc;
}
sub read_interface_conf {
my ($file) = @_;
my %intf = getVarsFromSh($file) or die "cannot open file $file: $!";
$intf{BOOTPROTO} ||= 'static';
$intf{isPtp} = $intf{NETWORK} eq '255.255.255.255';
$intf{isUp} = 1;
\%intf;
}
sub write_conf {
my ($file, $netc) = @_;
add2hash($netc, {
NETWORKING => "yes",
FORWARD_IPV4 => "false",
HOSTNAME => "localhost.localdomain",
});
add2hash($netc, { DOMAINNAME => $netc->{HOSTNAME} =~ /\.(.*)/ });
setVarsInSh($file, $netc, qw(NETWORKING FORWARD_IPV4 HOSTNAME DOMAINNAME GATEWAY GATEWAYDEV));
}
sub write_resolv_conf {
my ($file, $netc) = @_;
#- We always write these, even if they were autoconfigured. Otherwise, the reverse name lookup in the install doesn't work.
unless ($netc->{DOMAINNAME} || dnsServers($netc)) {
unlink($file);
log::l("neither domain name nor dns server are configured");
return 0;
}
my @l = cat_($file);
local *F;
open F, "> $file" or die "cannot write $file: $!";
print F "search $netc->{DOMAINNAME}\n" if $netc->{DOMAINNAME};
print F "nameserver $_\n" foreach dnsServers($netc);
print F "#$_" foreach @l;
#-res_init(); # reinit the resolver so DNS changes take affect
1;
}
sub write_interface_conf {
my ($file, $intf) = @_;
my @ip = split '\.', $intf->{IPADDR};
my @mask = split '\.', $intf->{NETMASK};
add2hash($intf, {
BROADCAST => join('.', mapn { int $_[0] | ~int $_[1] & 255 } \@ip, \@mask),
NETWORK => join('.', mapn { int $_[0] & $_[1] } \@ip, \@mask),
ONBOOT => "yes",
});
setVarsInSh($file, $intf, qw(DEVICE BOOTPROTO IPADDR NETMASK NETWORK BROADCAST ONBOOT));
}
sub add2hosts {
my ($file, $hostname, @ips) = @_;
my %l;
$l{$_} = $hostname foreach @ips;
local *F;
if (-e $file) {
open F, $file or die "cannot open $file: $!";
/\s*(\S+)(.*)/ and $l{$1} = $2 foreach <F>;
}
log::l("writing host information to $file");
open F, ">$file" or die "cannot write $file: $!";
while (my ($ip, $v) = each %l) {
print F "$ip";
if ($v =~ /^\s/) {
print F $v;
} else {
print F "\t\t$v";
print F " $1" if $v =~ /(.*?)\./;
}
print F "\n";
}
}
# The interface/gateway needs to be configured before this will work!
sub guessHostname {
my ($prefix, $netc, $intf) = @_;
$intf->{isUp} && dnsServers($netc) or return 0;
$netc->{HOSTNAME} && $netc->{DOMAINNAME} and return 1;
write_resolv_conf("$prefix/etc/resolv.conf", $netc);
my $name = gethostbyaddr(Socket::inet_aton($intf->{IPADDR}), AF_INET) or log::l("reverse name lookup failed"), return 0;
log::l("reverse name lookup worked");
add2hash($netc, { HOSTNAME => $name });
1;
}
sub addDefaultRoute {
my ($netc) = @_;
c::addDefaultRoute($netc->{GATEWAY}) if $netc->{GATEWAY};
}
sub sethostname {
my ($netc) = @_;
syscall_('sethostname', $netc->{HOSTNAME}, length $netc->{HOSTNAME}) or log::l("sethostname failed: $!");
}
sub dnsServers {
my ($netc) = @_;
grep { $_ } map { $netc->{$_} } qw(dnsServer dnsServer2 dnsServer3);
}
sub findIntf {
my ($intf, $device) = @_;
my ($l) = grep { $_->{DEVICE} eq $device } @$intf;
push @$intf, $l = { DEVICE => $device } unless $l;
$l;
}
#PAD \s* a la fin
my $ip_regexp = qr/(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/;
sub is_ip {
my ($ip) = @_;
return 0 unless $ip =~ $ip_regexp;
my @fields = ($1, $2, $3, $4);
foreach (@fields) {
return 0 if $_ < 0 || $_ > 255;
}
return 1;
}
sub netmask {
my ($ip) = @_;
return "255.255.255.0" unless is_ip($ip);
$ip =~ $ip_regexp;
if ($1 >= 1 && $1 < 127) {
return "255.0.0.0"; #-1.0.0.0 to 127.0.0.0
} elsif ($1 >= 128 && $1 <= 191 ){
return "255.255.0.0"; #-128.0.0.0 to 191.255.0.0
} elsif ($1 >= 192 && $1 <= 223) {
return "255.255.255.0";
} else {
return "255.255.255.255"; #-experimental classes
}
}
sub masked_ip {
my ($ip) = @_;
return "" unless is_ip($ip);
my @mask = netmask($ip) =~ $ip_regexp;
my @ip = $ip =~ $ip_regexp;
for (my $i = 0; $i < @ip; $i++) {
$ip[$i] &= int $mask[$i];
}
join(".", @ip);
}
sub dns {
my ($ip) = @_;
my $mask = masked_ip($ip);
my @masked = masked_ip($ip) =~ $ip_regexp;
$masked[3] = 12;
join (".", @masked);
}
sub gateway {
my ($ip) = @_;
my @masked = masked_ip($ip) =~ $ip_regexp;
$masked[3] = 1;
join (".", @masked);
}
#-######################################################################################
#- Wonderful perl :(
#-######################################################################################
1;
|
