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use IO::Socket::INET; |
use IO::Socket::INET; |
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use File::Slurp; |
use File::Slurp; |
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use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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use Net::Ping; |
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use lib '..'; |
use lib '..'; |
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use Net::DHCP::Packet; |
use Net::DHCP::Packet; |
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use Net::DHCP::Constants 0.67; |
use Net::DHCP::Constants 0.67; |
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use CouchDB; |
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use format; |
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use server; |
use server; |
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my $debug = server::debug; |
my $debug = server::debug; |
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warn "server ip $server::ip range: $server::ip_from - $server::ip_to\n"; |
warn "server ip $server::ip range: $server::ip_from - $server::ip_to\n"; |
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my $addr = $server::ip_from; |
use client; |
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sub client_ip { |
sub client_mac_ip { |
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my ( $mac ) = @_; |
my ( $mac, $request_ip ) = @_; |
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if ( ! $mac ) { |
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warn "W: no mac in requiest\n"; |
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return; |
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} |
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my $conf = $server::conf; |
my $conf = $server::conf; |
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mkdir $conf unless -e $conf; |
mkdir $conf unless -e $conf; |
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if ( -e "$conf/mac/$mac" ) { |
my $ip; |
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my $ip = read_file "$conf/mac/$mac"; |
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if ( $ip = client::ip_from_mac( $mac ) ) { |
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print "RENEW $mac $ip\n"; |
print "RENEW $mac $ip\n"; |
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client::save_ip_mac( $ip, $mac ); |
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return $ip; |
return $ip; |
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} elsif ( ip::in_dhcp_range( $request_ip ) || $request_ip eq '0.0.0.0' ) { |
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$ip = client::next_ip( $mac ); |
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print "NEW $mac $ip\n"; |
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} else { |
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$ip = $request_ip; |
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client::save_ip_mac( $ip, $mac ); |
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warn "W: $ip out of server range $server::ip/$server::netmask\n"; |
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} |
} |
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my $p = Net::Ping->new; |
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my $prefix = $server::ip; |
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$prefix =~ s{\.\d+$}{.}; |
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my $ip = $prefix . $addr; |
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while ( -e "$conf/ip/$ip" || $p->ping( $ip ) ) { |
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$ip = $prefix . $addr++; |
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die "all addresses allocated!" if $addr == $server::ip_to; |
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} |
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write_file "$conf/mac/$mac", $ip; |
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my $ip_path = "$conf/ip/$ip"; |
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mkdir $ip_path unless -e $ip_path; |
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if ( -l "$ip_path/mac" && readlink "$ip_path/mac" ne "$conf/mac/$mac" ) { |
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warn "$mac IP changed from ", readlink "$ip_path/mac", " to $ip"; |
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unlink "$ip_path/mac"; |
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}; |
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symlink "$conf/mac/$mac", "$ip_path/mac"; |
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print "$mac NEW $ip\n"; |
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return $ip; |
return $ip; |
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} |
} |
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sub process_packet { |
sub process_packet { |
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my $sock = shift; |
my $sock = shift; |
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server->refresh; |
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my $buf; |
my $buf; |
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$sock->recv($buf, 1024); |
$sock->recv($buf, 1024); |
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my $size = 'empty'; |
my $size = 'empty'; |
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return unless $buf; |
return unless $buf; |
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my $dhcp = Net::DHCP::Packet->new($buf); |
my $dhcp = Net::DHCP::Packet->new($buf); |
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$dhcp->comment( $transaction++ ); |
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warn "recv: ", $dhcp->toString if $debug; |
warn "recv: ", $dhcp->toString if $debug; |
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my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
$dhcp->comment( $transaction++ ); |
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my $ip = client_ip($mac); |
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my $mac = format::mac( substr($dhcp->chaddr(),0,$dhcp->hlen()*2) ); |
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my $ip = client_mac_ip($mac, $dhcp->ciaddr); |
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my $hostname = $dhcp->getOptionValue(DHO_HOST_NAME); |
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print "$ip ", client::conf( $ip => 'hostname', default => $hostname ), " >> /etc/hosts\n" if $hostname; |
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my $audit = { mac => $mac, ip => $ip, hostname => $hostname, |
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options => { |
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map { |
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( $_ => $dhcp->getOptionValue( $_ ) ) |
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} @{ $dhcp->{options_order} } |
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}, |
108 |
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}; |
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=for later |
=for later |
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config::for_ip( $ip ); |
config::for_ip( $ip ); |
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my $server; |
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map { $server->{ $_ } = eval '$server::' . $_ } ( 'ip', 'netmask', 'bcast', 'domain' ); |
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if ( my $force = client::conf( $ip => 'dhcpd.pl' ) ) { |
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eval $force; |
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die "$force\n$@" if $@; |
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warn "force server ", dump $server; |
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} |
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my $packet = { |
my $packet = { |
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Op => BOOTREPLY(), |
Op => BOOTREPLY(), |
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Hops => $dhcp->hops(), |
Hops => $dhcp->hops(), |
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Flags => $dhcp->flags(), |
Flags => $dhcp->flags(), |
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Ciaddr => $dhcp->ciaddr(), |
Ciaddr => $dhcp->ciaddr(), |
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Yiaddr => $ip, |
Yiaddr => $ip, |
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Siaddr => $server::ip, |
Siaddr => $server->{ip}, |
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Giaddr => $dhcp->giaddr(), |
Giaddr => $dhcp->giaddr(), |
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Chaddr => $dhcp->chaddr(), |
Chaddr => $dhcp->chaddr(), |
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File => $file, |
File => $file, |
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DHO_DHCP_SERVER_IDENTIFIER() => $server::ip, # busybox/udhcpc needs it but doesn't request |
DHO_DHCP_SERVER_IDENTIFIER() => $server->{ip}, # busybox/udhcpc needs it but doesn't request |
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}; |
}; |
146 |
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my $options = { |
my $options = { |
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DHO_SUBNET_MASK() => $server::netmask, |
DHO_SUBNET_MASK() => $server->{netmask}, |
149 |
DHO_ROUTERS() => $server::ip, |
DHO_ROUTERS() => $server->{ip}, |
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DHO_DOMAIN_NAME() => $server::domain_name, |
DHO_DOMAIN_NAME() => $server->{domain}, |
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DHO_NAME_SERVERS() => $server::ip, |
DHO_NAME_SERVERS() => $server->{ip}, |
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DHO_DOMAIN_NAME_SERVERS() => $server::ip, |
DHO_DOMAIN_NAME_SERVERS() => $server->{ip}, |
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DHO_HOST_NAME() => client::conf( $ip, 'hostname' ), |
DHO_HOST_NAME() => client::conf( $ip, 'hostname' ), |
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DHO_BROADCAST_ADDRESS() => $server::bcast, |
DHO_BROADCAST_ADDRESS() => $server->{bcast}, |
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# DHO_NTP_SERVERS() => '', |
# DHO_NTP_SERVERS() => '', |
156 |
}; |
}; |
157 |
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my @requested = split(/\s/, $dhcp->getOptionValue(DHO_DHCP_PARAMETER_REQUEST_LIST)); |
my @requested = split(/\s/, $dhcp->getOptionValue(DHO_DHCP_PARAMETER_REQUEST_LIST)); |
159 |
warn "options ",dump( $options ), ' requested: ',dump( @requested ); |
warn "options ",dump( $options ), ' requested: ',dump( @requested ) if $debug; |
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161 |
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my @missing; |
162 |
foreach ( @requested ) { |
foreach ( @requested ) { |
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$packet->{$_} = $options->{$_} if defined $options->{$_}; |
if ( defined $options->{$_} ) { |
164 |
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$packet->{$_} = $options->{$_}; |
165 |
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} else { |
166 |
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push @missing, $_; |
167 |
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} |
168 |
} |
} |
169 |
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170 |
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warn "W: options requested but missing: ",dump( @missing ),$/; |
171 |
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$audit->{requested} = [ @requested ]; |
172 |
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$audit->{missing} = [ @missing ]; |
173 |
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foreach my $opt ( 'magic', 'config_file', 'path_prefix', 'reboot_time' ) { |
foreach my $opt ( 'magic', 'config_file', 'path_prefix', 'reboot_time' ) { |
175 |
my $DH0 = eval 'DHO_PXELINUX_' . uc $opt; |
my $DH0 = eval 'DHO_PXELINUX_' . uc $opt; |
176 |
warn "DH0: $@" if $@; |
warn "DH0: $@" if $@; |
177 |
my $v = eval "\$pxelinux::$opt"; |
my $v = eval "\$pxelinux::$opt"; |
178 |
warn "v: $@" if $@; |
warn "v: $@" if $@; |
179 |
next unless defined $v; |
next unless defined $v; |
180 |
warn "pxelinux dhcp option $opt = $DH0 = $v"; |
warn "pxelinux dhcp option $opt = $DH0 = $v\n" if $debug; |
181 |
$packet->{ $DH0 } = $v; |
$packet->{ $DH0 } = $v; |
182 |
} |
} |
183 |
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184 |
my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
185 |
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186 |
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my @type; |
187 |
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188 |
if ($messagetype eq DHCPDISCOVER()) { |
if ($messagetype eq DHCPDISCOVER()) { |
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log::mac $mac, "DHCP DISCOVER"; |
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189 |
$packet->{Comment} = $dhcp->comment(); |
$packet->{Comment} = $dhcp->comment(); |
190 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
191 |
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@type = qw( discover offer ); |
192 |
} elsif ($messagetype eq DHCPREQUEST()) { |
} elsif ($messagetype eq DHCPREQUEST()) { |
193 |
my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
@type = qw( request ); |
194 |
log::mac $mac, "DHCP REQUEST $requested_ip $ip $file"; |
my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()) || $dhcp->ciaddr(); |
195 |
if ( $ip eq $requested_ip ) { |
if ( $ip eq $requested_ip ) { |
196 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
197 |
$packet->{DHO_DHCP_LEASE_TIME()} = 5 * 60; # 5 min |
$packet->{DHO_DHCP_LEASE_TIME()} = 5 * 60; # 5 min |
198 |
# $packet->{DHO_ROOT_PATH()} = '/exports/foobar'; |
# $packet->{DHO_ROOT_PATH()} = '/exports/foobar'; |
199 |
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$type[1] = 'ack'; |
200 |
} else { |
} else { |
201 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPNAK(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPNAK(); |
202 |
$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip got $requested_ip"; |
203 |
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$type[1] = 'nak'; |
204 |
} |
} |
205 |
} elsif ($messagetype eq DHCPINFORM()) { |
} elsif ($messagetype eq DHCPINFORM()) { |
206 |
log::mac $mac, "DHCP INFORM ignored"; |
@type = qw( inform ignored ); |
207 |
} else { |
} else { |
208 |
log::mac $mac, "$messagetype igored (bootp?)"; |
@type = ( $messagetype, 'ignored' ); |
209 |
} |
} |
210 |
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211 |
warn "packet ",dump( $packet ); |
warn "# type ",dump @type; |
212 |
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$audit->{type} = [ @type ]; |
213 |
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214 |
warn ">> $mac == $ip server: $server::ip", $file ? " file: $file\n" : "\n" if $debug; |
$audit->{response} = $packet; |
215 |
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216 |
$packet = new Net::DHCP::Packet( %$packet ); |
$packet = new Net::DHCP::Packet( %$packet ); |
217 |
warn "send ",$packet->toString() if $debug; |
warn "send ",$packet->toString() if $debug; |
218 |
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219 |
my $reply = IO::Socket::INET->new( |
if ( ip::in_dhcp_range( $ip ) ) { |
220 |
LocalAddr => $server::ip, |
my $buff = $packet->serialize(); |
221 |
LocalPort => 67, |
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222 |
Proto => "udp", |
my $reply = IO::Socket::INET->new( |
223 |
Broadcast => 1, |
LocalAddr => $server->{ip}, |
224 |
PeerAddr => '255.255.255.255', |
LocalPort => 67, |
225 |
PeerPort => 68, |
Proto => "udp", |
226 |
Reuse => 1, |
Broadcast => 1, |
227 |
) or die "socket: $@"; |
# PeerAddr => '255.255.255.255', |
228 |
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PeerAddr => $server->{bcast}, |
229 |
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PeerPort => 68, |
230 |
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Reuse => 1, |
231 |
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) or die "socket: $@"; |
232 |
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233 |
my $buff = $packet->serialize(); |
$reply->send( $buff, 0 ) or die "Error sending: $!\n"; |
234 |
$reply->send( $buff, 0 ) or die "Error sending: $!\n"; |
warn ">> $mac == $ip server: $server->{ip}", $file ? " file: $file\n" : "\n"; |
235 |
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} else { |
236 |
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$audit->{error} = "$ip not in server range $server::ip $server::netmask - no packet sent"; |
237 |
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warn $audit->{error}; |
238 |
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} |
239 |
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240 |
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CouchDB::audit( @type, $audit ); |
241 |
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242 |
# system("arp -s $ip $mac"), |
# system("arp -s $ip $mac"), |
243 |
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259 |
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260 |
print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n"; |
print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n"; |
261 |
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262 |
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CouchDB::audit( 'start', { addr => $sock->sockhost, port => $sock->sockport } ); |
263 |
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264 |
while (1) { |
while (1) { |
265 |
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server->refresh; |
266 |
process_packet $sock; |
process_packet $sock; |
267 |
} |
} |
268 |
} |
} |