lib/PXElator/network.pm

package network;

use warnings;
use strict;

use File::Slurp;

use server;

sub ifconfig {
        my $dev = shift;
        `/sbin/ifconfig $dev`
}

sub tap {

        if ( $server::ip !~ m{^172} ) {
                warn "W: not configuring tap0 interface!";
                return;
        }

        my $interfaces = read_file '/etc/network/interfaces';

        if ( $interfaces !~ m{tap0}s ) {

                system "sudo apt-get install vde2";

                write_file '/tmp/interfaces', qq{

# added by PXElator
iface tap0 inet static
        address $server::ip
        netmask $server::netmask
        vde2-switch -
        # setup NAT for vde network
        post-up sysctl -w net.ipv4.ip_forward=1
        post-up iptables -t nat -A POSTROUTING -s $server::ip/$server::netmask -o wlan0 -j MASQUERADE

                };

                system q|sudo sh -c 'cat /tmp/interfaces >> /etc/network/interfaces'|;
                system q|sudo sh -c 'usermod -G vde2-net -a $SUDO_USER'|;

        }

        my $ifconfig = ifconfig('tap0');
        if ( $ifconfig =~ m{UP} ) {
                 $ifconfig =~ m{$server::ip}s && return 'up';
                system("sudo /sbin/ifconfig tap0 $server::ip netmask $server::netmask") == 0 && return "ip changed $server::ip";
                die "can't change IP address of tap0 to $server::ip";
        } else {
                die "bring interface up with: sudo ifup tap0\n";
        }
}

1;
1	package network;
2
3	use warnings;
4	use strict;
5
6	use File::Slurp;
7
8	use server;
9
10	sub ifconfig {
11	my $dev = shift;
12	`/sbin/ifconfig $dev`
13	}
14
15	sub tap {
16
17	if ( $server::ip !~ m{^172} ) {
18	warn "W: not configuring tap0 interface!";
19	return;
20	}
21
22	my $interfaces = read_file '/etc/network/interfaces';
23
24	if ( $interfaces !~ m{tap0}s ) {
25
26	system "sudo apt-get install vde2";
27
28	write_file '/tmp/interfaces', qq{
29
30	# added by PXElator
31	iface tap0 inet static
32	address $server::ip
33	netmask $server::netmask
34	vde2-switch -
35	# setup NAT for vde network
36	post-up sysctl -w net.ipv4.ip_forward=1
37	post-up iptables -t nat -A POSTROUTING -s $server::ip/$server::netmask -o wlan0 -j MASQUERADE
38
39	};
40
41	system q\|sudo sh -c 'cat /tmp/interfaces >> /etc/network/interfaces'\|;
42	system q\|sudo sh -c 'usermod -G vde2-net -a $SUDO_USER'\|;
43
44	}
45
46	my $ifconfig = ifconfig('tap0');
47	if ( $ifconfig =~ m{UP} ) {
48	$ifconfig =~ m{$server::ip}s && return 'up';
49	system("sudo /sbin/ifconfig tap0 $server::ip netmask $server::netmask") == 0 && return "ip changed $server::ip";
50	die "can't change IP address of tap0 to $server::ip";
51	} else {
52	die "bring interface up with: sudo ifup tap0\n";
53	}
54	}
55
56	1;