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_RELEASE);
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 RFC 3315)
65
$msg->add_option($OPT_SERVERID, "InfiniteEntropy");
67
# add Elapsed Time, set to 0 on first packet (required by RFC 3315)
68
$msg->add_option($OPT_ELAPSED_TIME, "\x00\x00");
70
# add IA_NA for each interface (required by DOCSIS and RFC 3315)
71
# XXX: should this be a single interface only?
73
foreach my $iface (dhcp_client::iface()) {
74
my $option_data = pack("NNN", ++$iaid, 0, 0);
75
$msg->add_option($OPT_IA_NA, $option_data);
78
# timeout parameters, from DOCSIS
79
my $IRT = $SOL_TIMEOUT;
80
my $MRT = $SOL_MAX_RT;
81
my $MRC = 4; # DOCSIS says 4, RFC 3315 says it SHOULD be 0
84
# sleep a random amount of time between 0 and 1 second, required by RFC 3315
85
# XXX: this seems pretty stupid
86
sleep(rand($SOL_MAX_DELAY));
92
$mrd_end_time = time() + $MRD;
96
# create our socket, and send our Solicit
97
socket(SOCK, PF_INET6, SOCK_DGRAM, getprotobyname('udp')) || die;
98
my $addr = inet_pton(AF_INET6, $All_DHCP_Servers);
99
my $packet = $msg->packet();
100
my $send_ret = send(SOCK, $packet, 0,
101
pack_sockaddr_in6($server_port, $addr));
102
if (not defined($send_ret)) {
104
"Error \%d sending DHCPv6 Solicit message;\n\%s\n",
107
} elsif ($send_ret != length($packet)) {
108
print STDERR "Unable to send entire DHCPv6 Solicit message.\n";
113
my $RAND = rand(0.2) - 0.1;
115
$RT = 2*$RT + $RAND*$RT;
116
if (($RT > $MRT) && ($MRT != 0)) {
117
$RT = $MRT + $RAND*$RT;
120
$RT = $IRT + $RAND*$IRT;
123
my $rt_end_time = time() + $RT;
124
if (defined($mrd_end_time) && ($mrd_end_time > $rt_end_time)) {
125
$rt_end_time = $mrd_end_time;
129
my $timeout = $rt_end_time - time();
131
# print STDERR "Timeout waiting for DHCPv6 Advertise ",
132
# "or Reply message.\n";
136
my @ready = IO::Select->new(\*SOCK)->can_read($timeout);
142
$recv_ret = recv(SOCK, $reply, 1500, 0);
143
if (not defined $recv_ret) {
145
"Error \%d receiving DHCPv6 " .
151
$reply_msg = dhcp_client::msg::decode($reply, 1);
152
if (($reply_msg->{msg_type} == $MSG_ADVERTISE) ||
153
($reply_msg->{msg_type} == $MSG_REPLY)) {
159
} until ($reply_msg ||
160
(($MRC != 0) && ($count > $MRC)) ||
161
(defined($mrd_end_time) && ($mrd_end_time > time())));
163
unless ($reply_msg) {
164
if (($MRC != 0) && ($count >= $MRC)) {
166
"No reply after maximum retransmission count.\n";
169
"No reply after maximum retransmission duration.\n";
173
if ($reply_msg && ($reply_msg->{msg_type} == $MSG_REPLY)) {
174
print "Got DHCPv6 Reply message.\n";
178
#$Data::Dumper::Useqq = 1;
179
#print Dumper($msg), "\n";
180
#print Dumper($msg->packet()), "\n";
182
#print "packet length: ", length($msg->packet()), "\n";