diff options
Diffstat (limited to 'tests/DHCPv6/dhcp_client.pm')
| -rw-r--r-- | tests/DHCPv6/dhcp_client.pm | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/tests/DHCPv6/dhcp_client.pm b/tests/DHCPv6/dhcp_client.pm new file mode 100644 index 0000000..5caa377 --- /dev/null +++ b/tests/DHCPv6/dhcp_client.pm @@ -0,0 +1,454 @@ +#! /usr/bin/perl -w + +# Copyright (c) 2007,2009 by Internet Systems Consortium, Inc. ("ISC") +# +# Permission to use, copy, modify, and distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT +# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +# +# Internet Systems Consortium, Inc. +# 950 Charter Street +# Redwood City, CA 94063 +# <info@isc.org> +# https://www.isc.org/ + +package dhcp_client; + +require Exporter; + +@ISA = qw(Exporter); + +# message types +$MSG_SOLICIT = 1; +$MSG_ADVERTISE = 2; +$MSG_REQUEST = 3; +$MSG_CONFIRM = 4; +$MSG_RENEW = 5; +$MSG_REBIND = 6; +$MSG_REPLY = 7; +$MSG_RELEASE = 8; +$MSG_DECLINE = 9; +$MSG_RECONFIGURE = 10; +$MSG_INFORMATION_REQUEST = 11; +$MSG_RELAY_FORW = 12; +$MSG_RELAY_REPL = 13; + +# option numbers +$OPT_CLIENTID = 1; +$OPT_SERVERID = 2; +$OPT_IA_NA = 3; +$OPT_IA_TA = 4; +$OPT_IAADDR = 5; +$OPT_ORO = 6; +$OPT_PREFERENCE = 7; +$OPT_ELAPSED_TIME = 8; +$OPT_RELAY_MSG = 9; +$OPT_AUTH = 11; +$OPT_UNICAST = 12; +$OPT_STATUS_CODE = 13; +$OPT_RAPID_COMMIT = 14; +$OPT_USER_CLASS = 15; +$OPT_VENDOR_CLASS = 16; +$OPT_VENDOR_OPTS = 17; +$OPT_INTERFACE_ID = 18; +$OPT_RECONF_MSG = 19; +$OPT_RECONF_ACCEPT = 20; + +# timeouts +$SOL_MAX_DELAY = 1; +$SOL_TIMEOUT = 1; +$SOL_MAX_RT = 120; +$REQ_TIMEOUT = 1; +$REQ_MAX_RT = 30; +$REQ_MAX_RC = 10; +$CNF_MAX_DELAY = 1; +$CNF_MAX_RT = 4; +$CNF_MAX_RD = 10; +$REN_TIMEOUT = 10; +$REN_MAX_RT = 600; +$REB_TIMEOUT = 10; +$REB_MAX_RT = 600; +$INF_MAX_DELAY = 1; +$INF_TIMEOUT = 1; +$INF_MAX_RT = 120; +$REL_TIMEOUT = 1; +$REL_MAX_RC = 5; +$DEC_TIMEOUT = 1; +$DEC_MAX_RC = 5; +$REC_TIMEOUT = 2; +$REC_MAX_RC = 8; +$HOP_COUNT_LIMIT = 32; + +@EXPORT = qw( $MSG_SOLICIT $MSG_ADVERTISE $MSG_REQUEST $MSG_CONFIRM + $MSG_RENEW $MSG_REBIND $MSG_REPLY $MSG_RELEASE $MSG_DECLINE + $MSG_RECONFIGURE $MSG_INFORMATION_REQUEST $MSG_RELAY_FORW + $MSG_RELAY_REPL + $OPT_CLIENTID $OPT_SERVERID $OPT_IA_NA $OPT_IA_TA $OPT_IAADDR + $OPT_ORO $OPT_PREFERENCE $OPT_ELAPSED_TIME $OPT_RELAY_MSG + $OPT_AUTH $OPT_UNICAST $OPT_STATUS_CODE $OPT_RAPID_COMMIT + $OPT_USER_CLASS $OPT_VENDOR_CLASS $OPT_VENDOR_OPTS + $OPT_INTERFACE_ID $OPT_RECONF_MSG $OPT_RECONF_ACCEPT + $SOL_MAX_DELAY $SOL_TIMEOUT $SOL_MAX_RT $REQ_TIMEOUT + $REQ_MAX_RT $REQ_MAX_RC $CNF_MAX_DELAY $CNF_MAX_RT + $CNF_MAX_RD $REN_TIMEOUT $REN_MAX_RT $REB_TIMEOUT $REB_MAX_RT + $INF_MAX_DELAY $INF_TIMEOUT $INF_MAX_RT $REL_TIMEOUT + $REL_MAX_RC $DEC_TIMEOUT $DEC_MAX_RC $REC_TIMEOUT $REC_MAX_RC + $HOP_COUNT_LIMIT ); + +my %msg_type_num = ( + MSG_SOLICIT => 1, + MSG_ADVERTISE => 2, + MSG_REQUEST => 3, + MSG_CONFIRM => 4, + MSG_RENEW => 5, + MSG_REBIND => 6, + MSG_REPLY => 7, + MSG_RELEASE => 8, + MSG_DECLINE => 9, + MSG_RECONFIGURE => 10, + MSG_INFORMATION_REQUEST => 11, + MSG_RELAY_FORW => 12, + MSG_RELAY_REPL => 13, +); +my %msg_num_type = reverse(%msg_type_num); + +my %opt_type_num = ( + OPT_CLIENTID => 1, + OPT_SERVERID => 2, + OPT_IA_NA => 3, + OPT_IA_TA => 4, + OPT_IAADDR => 5, + OPT_ORO => 6, + OPT_PREFERENCE => 7, + OPT_ELAPSED_TIME => 8, + OPT_RELAY_MSG => 9, + OPT_AUTH => 11, + OPT_UNICAST => 12, + OPT_STATUS_CODE => 13, + OPT_RAPID_COMMIT => 14, + OPT_USER_CLASS => 15, + OPT_VENDOR_CLASS => 16, + OPT_VENDOR_OPTS => 17, + OPT_INTERFACE_ID => 18, + OPT_RECONF_MSG => 19, + OPT_RECONF_ACCEPT => 20, +); +my %opt_num_type = reverse(%opt_type_num); + +my %status_code_num = ( + Success => 0, + UnspecFail => 1, + NoAddrsAvail => 2, + NoBinding => 3, + NotOnLink => 4, + UseMulticast => 5, +); +my %status_num_code = reverse(%status_code_num); + +my %docsis_type_num = ( + CL_OPTION_ORO => 1, + CL_OPTION_TFTP_SERVERS => 32, + CL_OPTION_CONFIG_FILE_NAME => 33, + CL_OPTION_SYSLOG_SERVERS => 34, + CL_OPTION_TLV5 => 35, + CL_OPTION_DEVICE_ID => 36, + CL_OPTION_CCC => 37, + CL_OPTION_DOCSIS_VERS => 38, +); +my %docsis_num_type = reverse(%docsis_type_num); + +use strict; +use English; +use POSIX; + +# XXX: very Solaris-specific +sub iface { + my @ifaces; + foreach my $fname (glob("/etc/hostname.*")) { + $fname =~ s[^/etc/hostname.][]; + push(@ifaces, $fname); + } + return wantarray() ? @ifaces : $ifaces[0]; +} + +# XXX: very Solaris-specific +sub mac_addr { + my @ip_addrs; + foreach my $iface (iface()) { + if (`ifconfig $iface 2>/dev/null` =~ /\sinet (\S+)\s/) { + push(@ip_addrs, $1); + } + } + my @mac_addrs; + foreach my $line (split(/\n/, `arp -an 2>/dev/null`)) { + my @parts = split(/\s+/, $line); + my $ip = $parts[1]; + my $mac = $parts[-1]; + if (grep { $ip eq $_ } @ip_addrs) { + $mac =~ s/://g; + push(@mac_addrs, $mac); + } + } + return wantarray() ? @mac_addrs : $mac_addrs[0]; +} + +sub mac_addr_binary { + my @mac_addr = split(//, mac_addr()); + my $mac_addr = join("", map { chr(hex($_)) } @mac_addr); + return $mac_addr; +} + +# DHCPv6 times start 2000-01-01 00:00:00 +my $dhcp_time_base = 946684800; +#{ +# local $ENV{TZ} = "UTC"; +# POSIX::tzset(); +# $dhcp_time_base = POSIX::mktime(0, 0, 0, 1, 0, 100); +#} + +sub dhcpv6_time { + return time() - $dhcp_time_base; +} + +sub duid { + my ($type) = @_; + + $type = 1 unless (defined $type); + + if (($type == 1) || ($type == 3)) { + my $mac_addr = mac_addr_binary(); + if ($type == 1) { + my $time = pack("N", dhcpv6_time()); + return "\x00\x01\x00\x01${time}${mac_addr}"; + } else { + return "\x00\x03\x00\x01${mac_addr}"; + } + } else { + die "Unknown DUID type $type requested"; + } +} + +package dhcp_client::msg; + +use Socket; +use Socket6; + +sub new { + my ($pkg, $msg_type, $trans_id) = @_; + + my $this = {}; + bless $this; + + $this->{msg_type} = $msg_type+0; + if (defined $trans_id) { + $this->{trans_id} = $trans_id; + } else { + $this->{trans_id} = chr(rand(256)) . + chr(rand(256)) . chr(rand(256)); + } + $this->{options} = [ ]; + + return $this; +} + + +sub add_option { + my ($this, $num, $data) = @_; + + push(@{$this->{options}}, [ $num, $data ]); +} + +sub get_option { + my ($this, $num) = @_; + my @options; + foreach my $option (@{$this->{options}}) { + if ($option->[0] == $num) { + push(@options, $option->[1]); + } + } + return wantarray() ? @options : $options[0]; +} + +sub packed_options { + my ($this) = @_; + + my $options = ""; + foreach my $option (@{$this->{options}}) { + $options .= pack("nn", $option->[0], length($option->[1])); + $options .= $option->[1]; + } + return $options; +} + +sub packet { + my ($this) = @_; + + my $packet = ""; + $packet .= chr($this->{msg_type}); + $packet .= $this->{trans_id}; + $packet .= $this->packed_options(); + return $packet; +} + +sub unpack_options { + my ($options) = @_; + + my @parsed_options; + my $p = 0; + while ($p < length($options)) { + my ($id, $len) = unpack("nn", substr($options, $p, 4)); + push(@parsed_options, [ $id, substr($options, $p + 4, $len) ]); + $p += 4 + $len; + } + return @parsed_options; +} + +sub print_docsis_option { + my ($num, $data, $indent) = @_; + + print "${indent}DOCSIS Option $num"; + if ($docsis_num_type{$num}) { + print " ($docsis_num_type{$num})"; + } + print ", length ", length($data), "\n"; + + return unless ($docsis_num_type{$num}); + + if ($docsis_num_type{$num} eq "CL_OPTION_ORO") { + my $num_oro = length($data) / 2; + for (my $i=0; $i<$num_oro; $i++) { + my $oro_num = unpack("n", substr($data, $i*2, 2)); + print "${indent} $oro_num"; + if ($docsis_num_type{$oro_num}) { + print " ($docsis_num_type{$oro_num})"; + } + print "\n"; + } + } elsif ($docsis_num_type{$num} eq "CL_OPTION_TFTP_SERVERS") { + my $num_servers = length($data) / 16; + for (my $i=0; $i<$num_servers; $i++) { + my $srv = inet_ntop(AF_INET6, substr($data, $i*16, 16)); + print "$indent TFTP server ", ($i+1), ": "; + print uc($srv), "\n"; + } + } elsif ($docsis_num_type{$num} eq "CL_OPTION_CONFIG_FILE_NAME") { + print "$indent Config file name: \"$data\"\n" + } elsif ($docsis_num_type{$num} eq "CL_OPTION_SYSLOG_SERVERS") { + my $num_servers = length($data) / 16; + for (my $i=0; $i<$num_servers; $i++) { + my $srv = inet_ntop(AF_INET6, substr($data, $i*16, 16)); + print "$indent syslog server ", ($i+1), ": "; + print uc($srv), "\n"; + } + } +} + +sub print_option { + my ($num, $data, $indent) = @_; + + print "${indent}Option $num"; + if ($opt_num_type{$num}) { + print " ($opt_num_type{$num})"; + } + print ", length ", length($data), "\n"; + if ($num == $dhcp_client::OPT_ORO) { + my $num_oro = length($data) / 2; + for (my $i=0; $i<$num_oro; $i++) { + my $oro_num = unpack("n", substr($data, $i*2, 2)); + print "${indent} $oro_num"; + if ($opt_num_type{$oro_num}) { + print " ($opt_num_type{$oro_num})"; + } + print "\n"; + } + } elsif (($num == $dhcp_client::OPT_CLIENTID) || + ($num == $dhcp_client::OPT_SERVERID)) { + print $indent, " "; + if (length($data) > 0) { + printf '%02X', ord(substr($data, 0, 1)); + for (my $i=1; $i<length($data); $i++) { + printf ':%02X', ord(substr($data, $i, 1)); + } + } + print "\n"; + } elsif ($num == $dhcp_client::OPT_IA_NA) { + printf "${indent} IAID: 0x\%08X\n", + unpack("N", substr($data, 0, 4)); + printf "${indent} T1: \%d\n", unpack("N", substr($data, 4, 4)); + printf "${indent} T2: \%d\n", unpack("N", substr($data, 8, 4)); + if (length($data) > 12) { + printf "${indent} IA_NA encapsulated options:\n"; + foreach my $option (unpack_options(substr($data, 12))) { + print_option(@{$option}, $indent . " "); + } + } + } elsif ($num == $dhcp_client::OPT_IAADDR) { + printf "${indent} IPv6 address: \%s\n", + uc(inet_ntop(AF_INET6, substr($data, 0, 16))); + printf "${indent} Preferred lifetime: \%d\n", + unpack("N", substr($data, 16, 4)); + printf "${indent} Valid lifetime: \%d\n", + unpack("N", substr($data, 20, 4)); + if (length($data) > 24) { + printf "${indent} IAADDR encapsulated options:\n"; + foreach my $option (unpack_options(substr($data, 24))) { + print_option(@{$option}, $indent . " "); + } + } + } elsif ($num == $dhcp_client::OPT_VENDOR_OPTS) { + my $enterprise_number = unpack("N", substr($data, 0, 4)); + print "${indent} Enterprise number: $enterprise_number\n"; + + # DOCSIS + if ($enterprise_number == 4491) { + foreach my $option (unpack_options(substr($data, 4))) { + print_docsis_option(@{$option}, $indent . " "); + } + } + } elsif ($num == $dhcp_client::OPT_STATUS_CODE) { + my $code = ord(substr($data, 0, 1)); + my $msg = substr($data, 1); + print "${indent} Code: $code"; + if ($status_num_code{$code}) { + print " ($status_num_code{$code})"; + } + print "\n"; + print "${indent} Message: \"$msg\"\n"; + } +} + +# XXX: we aren't careful about packet boundaries and values... +# DO NOT RUN ON PRODUCTION SYSTEMS!!! +sub decode { + my ($packet, $print) = @_; + + my $msg_type = ord(substr($packet, 0, 1)); + my $trans_id = substr($packet, 1, 3); + my $msg = dhcp_client::msg->new($msg_type, $trans_id); + + if ($print) { + print "DHCPv6 packet\n"; + print " Message type: $msg_num_type{$msg_type}\n"; + printf " Transaction id: 0x\%02X\%02X\%02X\n", + ord(substr($trans_id, 0, 1)), + ord(substr($trans_id, 1, 1)), + ord(substr($trans_id, 2, 1)); + print " Options:\n"; + } + + foreach my $option (unpack_options(substr($packet, 4))) { + print_option(@{$option}, " ") if ($print); + $msg->add_option(@{$option}); + } + + return $msg; +} + |