3
# Copyright (c) 2007 by Internet Systems Consortium, Inc. ("ISC")
5
# Permission to use, copy, modify, and distribute this software for any
6
# purpose with or without fee is hereby granted, provided that the above
7
# copyright notice and this permission notice appear in all copies.
9
# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
# Internet Systems Consortium, Inc.
19
# Redwood City, CA 94063
25
use Time::HiRes qw( sleep );
35
# not-yet-standard options
36
my $OPT_TIME_SERVERS = 40;
37
my $OPT_TIME_OFFSET = 41;
40
my $DOCSIS_OPT_ORO = 1;
41
# 2 to 31 are reserved
42
my $DOCSIS_OPT_TFTP_SERVERS = 32;
43
my $DOCSIS_OPT_CONFIG_FILE_NAME = 33;
44
my $DOCSIS_OPT_SYSLOG_SERVERS = 34;
45
my $DOCSIS_OPT_TLV5 = 35;
46
my $DOCSIS_OPT_DEVICE_ID = 36;
47
my $DOCSIS_OPT_CCC = 37;
48
my $DOCSIS_OPT_VERS = 38;
50
# well-known addresses
51
my $All_DHCP_Relay_Agents_and_Servers = "ff02::1:2";
52
my $All_DHCP_Servers = "ff05::1:3";
55
my $client_port = 546;
56
my $server_port = 547;
58
# create a new Solicit message
59
my $msg = dhcp_client::msg->new($MSG_REQUEST);
61
# add the Client Identifier (required by DOCSIS and RFC 3315)
62
$msg->add_option($OPT_CLIENTID, dhcp_client::duid());
64
# add the Server Identifier (required by DOCSIS and RFC 3315)
66
$msg->add_option($OPT_SERVERID, dhcp_client::duid());
68
# add Elapsed Time, set to 0 on first packet (required by RFC 3315)
69
$msg->add_option($OPT_ELAPSED_TIME, "\x00\x00");
71
# add IA_NA for each interface (required by DOCSIS and RFC 3315)
72
# XXX: should this be a single interface only?
74
foreach my $iface (dhcp_client::iface()) {
75
my $option_data = pack("NNN", ++$iaid, 0, 0);
76
$msg->add_option($OPT_IA_NA, $option_data);
79
# add Reconfigure Accept (required by DOCSIS)
80
$msg->add_option($OPT_RECONF_ACCEPT, "");
82
# add Options Request (required by DOCSIS, recommended by RFC 3315)
83
my @oro = ( $OPT_TIME_SERVERS, $OPT_TIME_OFFSET );
84
$msg->add_option($OPT_ORO, pack("n*", @oro));
87
# add Vendor Class option (required by DOCSIS)
88
$msg->add_option($OPT_VENDOR_CLASS, pack("N", 4491) . "docsis3.0");
90
# add Vendor-specific Information Option option (required by DOCSIS)
91
my $vsio = pack("N", 4491);
93
# ORO (required by DOCSIS)
94
my @docsis_oro = ( $DOCSIS_OPT_TFTP_SERVERS );
95
$vsio .= pack("nnC*", $DOCSIS_OPT_ORO, 0+@docsis_oro, @docsis_oro);
97
# TLV5 data: CMTS DOCSIS version number 3.0 (required by DOCSIS)
98
my $tlv5_data = "\x01\x02\x03\x0";
99
$vsio .= pack("nn", $DOCSIS_OPT_TLV5, length($tlv5_data)) . $tlv5_data;
101
# DOCSIS Device (required by DOCSIS)
102
my $docsis_device_id = dhcp_client::mac_addr_binary();
103
$vsio .= pack("nn", $DOCSIS_OPT_DEVICE_ID, length($docsis_device_id));
104
$vsio .= $docsis_device_id;
106
$msg->add_option($OPT_VENDOR_OPTS, $vsio);
108
# add Rapid Commit option (required by DOCSIS)
109
$msg->add_option($OPT_RAPID_COMMIT, "");
111
# timeout parameters, from DOCSIS
112
my $IRT = $SOL_TIMEOUT;
113
my $MRT = $SOL_MAX_RT;
114
my $MRC = 1; # DOCSIS says 4, RFC 3315 says it SHOULD be 0
117
# sleep a random amount of time between 0 and 1 second, required by RFC 3315
118
# XXX: this seems pretty stupid
119
sleep(rand($SOL_MAX_DELAY));
125
$mrd_end_time = time() + $MRD;
129
# create our socket, and send our Solicit
130
socket(SOCK, PF_INET6, SOCK_DGRAM, getprotobyname('udp')) || die;
131
my $addr = inet_pton(AF_INET6, $All_DHCP_Servers);
132
my $packet = $msg->packet();
133
my $send_ret = send(SOCK, $packet, 0,
134
pack_sockaddr_in6($server_port, $addr));
135
if (not defined($send_ret)) {
137
"Error \%d sending DHCPv6 Solicit message;\n\%s\n",
140
} elsif ($send_ret != length($packet)) {
141
print STDERR "Unable to send entire DHCPv6 Solicit message.\n";
146
my $RAND = rand(0.2) - 0.1;
148
$RT = 2*$RT + $RAND*$RT;
149
if (($RT > $MRT) && ($MRT != 0)) {
150
$RT = $MRT + $RAND*$RT;
153
$RT = $IRT + $RAND*$IRT;
156
my $rt_end_time = time() + $RT;
157
if (defined($mrd_end_time) && ($mrd_end_time > $rt_end_time)) {
158
$rt_end_time = $mrd_end_time;
162
my $timeout = $rt_end_time - time();
164
# print STDERR "Timeout waiting for DHCPv6 Advertise ",
165
# "or Reply message.\n";
169
my @ready = IO::Select->new(\*SOCK)->can_read($timeout);
175
$recv_ret = recv(SOCK, $reply, 1500, 0);
176
if (not defined $recv_ret) {
178
"Error \%d receiving DHCPv6 " .
184
$reply_msg = dhcp_client::msg::decode($reply);
185
if (($reply_msg->{msg_type} == $MSG_ADVERTISE) ||
186
($reply_msg->{msg_type} == $MSG_REPLY)) {
192
} until ($reply_msg ||
193
(($MRC != 0) && ($count > $MRC)) ||
194
(defined($mrd_end_time) && ($mrd_end_time > time())));
196
unless ($reply_msg) {
197
if (($MRC != 0) && ($count >= $MRC)) {
199
"No reply after maximum retransmission count.\n";
202
"No reply after maximum retransmission duration.\n";
206
if ($reply_msg && ($reply_msg->{msg_type} == $MSG_REPLY)) {
207
print "Got DHCPv6 Reply message.\n";
211
#$Data::Dumper::Useqq = 1;
212
#print Dumper($msg), "\n";
213
#print Dumper($msg->packet()), "\n";
215
#print "packet length: ", length($msg->packet()), "\n";