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# $Id: ARP.pm,v ce68fbcc7f6d 2019/05/23 05:58:40 gomor $ |
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# |
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package Net::Frame::Layer::ARP; |
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5076
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use strict; |
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use warnings; |
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use Net::Frame::Layer qw(:consts :subs); |
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442
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require Exporter; |
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our @ISA = qw(Net::Frame::Layer Exporter); |
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our %EXPORT_TAGS = ( |
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consts => [qw( |
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NF_ARP_HDR_LEN |
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NF_ARP_HTYPE_ETH |
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NF_ARP_PTYPE_IPv4 |
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NF_ARP_PTYPE_IPv6 |
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NF_ARP_HSIZE_ETH |
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NF_ARP_PSIZE_IPv4 |
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NF_ARP_PSIZE_IPv6 |
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NF_ARP_OPCODE_REQUEST |
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NF_ARP_OPCODE_REPLY |
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NF_ARP_ADDR_BROADCAST |
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)], |
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); |
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our @EXPORT_OK = ( |
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@{$EXPORT_TAGS{consts}}, |
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); |
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use constant NF_ARP_HDR_LEN => 28; |
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use constant NF_ARP_HTYPE_ETH => 0x0001; |
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use constant NF_ARP_PTYPE_IPv4 => 0x0800; |
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use constant NF_ARP_PTYPE_IPv6 => 0x86dd; |
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use constant NF_ARP_HSIZE_ETH => 0x06; |
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use constant NF_ARP_PSIZE_IPv4 => 0x04; |
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use constant NF_ARP_PSIZE_IPv6 => 0x16; |
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use constant NF_ARP_OPCODE_REQUEST => 0x0001; |
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use constant NF_ARP_OPCODE_REPLY => 0x0002; |
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use constant NF_ARP_ADDR_BROADCAST => '00:00:00:00:00:00'; |
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our @AS = qw( |
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hType |
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pType |
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hSize |
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pSize |
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opCode |
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src |
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srcIp |
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dst |
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dstIp |
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); |
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__PACKAGE__->cgBuildIndices; |
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__PACKAGE__->cgBuildAccessorsScalar(\@AS); |
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no strict 'vars'; |
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1523
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sub new { |
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my $self = shift->SUPER::new( |
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hType => NF_ARP_HTYPE_ETH, |
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pType => NF_ARP_PTYPE_IPv4, |
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hSize => NF_ARP_HSIZE_ETH, |
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pSize => NF_ARP_PSIZE_IPv4, |
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opCode => NF_ARP_OPCODE_REQUEST, |
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src => '00:00:00:00:00:00', |
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dst => NF_ARP_ADDR_BROADCAST, |
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srcIp => '127.0.0.1', |
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dstIp => '127.0.0.1', |
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@_, |
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); |
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1
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$self->[$__src] = lc($self->[$__src]) if $self->[$__src]; |
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$self->[$__dst] = lc($self->[$__dst]) if $self->[$__dst]; |
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return $self; |
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} |
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sub getLength { |
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my $self = shift; |
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my $len = NF_ARP_HDR_LEN; |
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$len += 24 if $self->[$__pType] == NF_ARP_PTYPE_IPv6; |
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return $len; |
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} |
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sub pack { |
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my $self = shift; |
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1
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(my $srcMac = $self->[$__src]) =~ s/://g; |
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(my $dstMac = $self->[$__dst]) =~ s/://g; |
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# IPv4 packing |
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if ($self->[$__pType] == NF_ARP_PTYPE_IPv4) { |
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1
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$self->[$__raw] = $self->SUPER::pack('nnCCnH12a4H12a4', |
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$self->[$__hType], |
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$self->[$__pType], |
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$self->[$__hSize], |
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$self->[$__pSize], |
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$self->[$__opCode], |
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$srcMac, |
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inetAton($self->[$__srcIp]), |
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$dstMac, |
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inetAton($self->[$__dstIp]), |
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) or return; |
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} |
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# IPv6 packing |
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else { |
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0
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0
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$self->[$__raw] = $self->SUPER::pack('nnCCnH12a*H12a*', |
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$self->[$__hType], |
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$self->[$__pType], |
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$self->[$__hSize], |
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$self->[$__pSize], |
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$self->[$__opCode], |
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$srcMac, |
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inet6Aton($self->[$__srcIp]), |
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$dstMac, |
115
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inet6Aton($self->[$__dstIp]), |
116
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) or return; |
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} |
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119
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1
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3
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return $self->[$__raw]; |
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} |
121
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122
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sub unpack { |
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1
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1
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4
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my $self = shift; |
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125
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1
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50
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5
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my ($hType, $pType, $tail) = $self->SUPER::unpack('nn a*', |
126
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$self->[$__raw]) |
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or return; |
128
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129
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1
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3
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my ($hSize, $pSize, $opCode, $srcMac, $srcIp, $dstMac, $dstIp, |
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$payload); |
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132
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# IPv4 unpacking |
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1
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50
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16
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if ($pType == NF_ARP_PTYPE_IPv4) { |
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1
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50
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3
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($hSize, $pSize, $opCode, $srcMac, $srcIp, $dstMac, $dstIp, |
135
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$payload) = $self->SUPER::unpack('CCnH12a4H12a4 a*', $tail) |
136
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or return; |
137
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1
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3
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$self->[$__srcIp] = inetNtoa($srcIp); |
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1
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18
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$self->[$__dstIp] = inetNtoa($dstIp); |
139
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} |
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# IPv6 unpacking |
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else { |
142
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0
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0
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0
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($hSize, $pSize, $opCode, $srcMac, $srcIp, $dstMac, $dstIp, |
143
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$payload) = $self->SUPER::unpack('CCnH12a16H12a16 a*', $tail) |
144
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or return; |
145
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0
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0
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$self->[$__srcIp] = inet6Ntoa($srcIp); |
146
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0
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0
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$self->[$__dstIp] = inet6Ntoa($dstIp); |
147
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} |
148
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149
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1
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2
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$self->[$__hType] = $hType; |
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1
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$self->[$__pType] = $pType; |
151
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1
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$self->[$__hSize] = $hSize; |
152
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1
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1
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$self->[$__pSize] = $pSize; |
153
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1
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$self->[$__opCode] = $opCode; |
154
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1
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3
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$self->[$__src] = convertMac($srcMac); |
155
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1
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$self->[$__dst] = convertMac($dstMac); |
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157
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1
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3
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$self->[$__payload] = $payload; |
158
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159
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1
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2
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return $self; |
160
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} |
161
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162
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0
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0
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1
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0
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sub getKey { shift->layer } |
163
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0
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0
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1
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0
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sub getKeyReverse { shift->layer } |
164
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165
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sub match { |
166
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0
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0
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1
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0
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my $self = shift; |
167
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0
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0
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my ($with) = @_; |
168
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0
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0
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0
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0
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($self->[$__opCode] == NF_ARP_OPCODE_REQUEST) |
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0
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0
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169
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&& ($with->[$__opCode] == NF_ARP_OPCODE_REPLY) |
170
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&& ($with->[$__dst] eq $self->[$__src]) |
171
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&& ($with->[$__srcIp] eq $self->[$__dstIp]) |
172
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&& ($with->[$__dstIp] eq $self->[$__srcIp]); |
173
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} |
174
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175
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sub encapsulate { |
176
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1
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1
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1
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8
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my $self = shift; |
177
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1
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3
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return $self->[$__nextLayer]; |
178
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} |
179
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180
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sub print { |
181
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1
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1
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1
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5
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my $self = shift; |
182
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183
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1
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5
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my $l = $self->layer; |
184
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1
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54
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sprintf |
185
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"$l: hType:0x%04x pType:0x%04x hSize:0x%02x pSize:0x%02x". |
186
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" opCode:0x%04x\n". |
187
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"$l: src:%s srcIp:%s\n". |
188
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"$l: dst:%s dstIp:%s", |
189
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$self->[$__hType], $self->[$__pType], $self->[$__hSize], |
190
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|
|
$self->[$__pSize], $self->[$__opCode], $self->[$__src], |
191
|
|
|
|
|
|
|
$self->[$__srcIp], $self->[$__dst], $self->[$__dstIp]; |
192
|
|
|
|
|
|
|
} |
193
|
|
|
|
|
|
|
|
194
|
|
|
|
|
|
|
1; |
195
|
|
|
|
|
|
|
|
196
|
|
|
|
|
|
|
__END__ |