tests/DHCPv6/210-solicit-nohost.pl

   1 #! /usr/bin/perl -w
   2
   3 # Copyright (C) 2007-2022 Internet Systems Consortium, Inc. ("ISC")
   4 #
   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.
   8 #
   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.
  16 #
  17 #   Internet Systems Consortium, Inc.
  18 #   PO Box 360
  19 #   Newmarket, NH 03857 USA
  20 #   <info@isc.org>
  21 #   https://www.isc.org/
  22
  23 use strict;
  24 use English;
  25 use Time::HiRes qw( sleep );
  26 use Socket;
  27 use Socket6;
  28 use IO::Select;
  29
  30 use dhcp_client;
  31
  32 # XXX: for debugging
  33 use Data::Dumper;
  34
  35 # not-yet-standard options
  36 my $OPT_TIME_SERVERS = 40;
  37 my $OPT_TIME_OFFSET = 41;
  38
  39 # DOCSIS sub-options
  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;
  49
  50 # well-known addresses
  51 my $All_DHCP_Relay_Agents_and_Servers = "ff02::1:2";
  52 my $All_DHCP_Servers = "ff05::1:3";
  53
  54 # ports
  55 my $client_port = 546;
  56 my $server_port = 547;
  57
  58 # create a new Solicit message
  59 my $msg = dhcp_client::msg->new($MSG_SOLICIT);
  60
  61 # add the Client Identifier (required by DOCSIS and RFC 3315)
  62 $msg->add_option($OPT_CLIENTID, dhcp_client::duid());
  63
  64 # add Elapsed Time, set to 0 on first packet (required by RFC 3315)
  65 $msg->add_option($OPT_ELAPSED_TIME, "\x00\x00");
  66
  67 # add IA_NA for each interface (required by DOCSIS and RFC 3315)
  68 # XXX: should this be a single interface only?
  69 my $iaid = 0;
  70 foreach my $iface (dhcp_client::iface()) {
  71         my $option_data = pack("NNN", ++$iaid, 0, 0);
  72         $msg->add_option($OPT_IA_NA, $option_data);
  73 }
  74
  75 # add Reconfigure Accept (required by DOCSIS)
  76 $msg->add_option($OPT_RECONF_ACCEPT, "");
  77
  78 # add Options Request (required by DOCSIS, recommended by RFC 3315)
  79 my @oro = ( $OPT_TIME_SERVERS, $OPT_TIME_OFFSET );
  80 $msg->add_option($OPT_ORO, pack("n*", @oro));
  81
  82
  83 # add Vendor Class option (required by DOCSIS)
  84 $msg->add_option($OPT_VENDOR_CLASS, pack("N", 4491) . "docsis3.0");
  85
  86 # add Vendor-specific Information Option option (required by DOCSIS)
  87 my $vsio = pack("N", 4491);
  88
  89 # ORO (required by DOCSIS)
  90 my @docsis_oro = ( $DOCSIS_OPT_TFTP_SERVERS );
  91 $vsio .= pack("nnC*", $DOCSIS_OPT_ORO, 0+@docsis_oro, @docsis_oro);
  92
  93 # TLV5 data: CMTS DOCSIS version number 3.0 (required by DOCSIS)
  94 my $tlv5_data = "\x01\x02\x03\x0";
  95 $vsio .= pack("nn", $DOCSIS_OPT_TLV5, length($tlv5_data)) . $tlv5_data;
  96
  97 # DOCSIS Device (required by DOCSIS)
  98 my $docsis_device_id = dhcp_client::mac_addr_binary();
  99 $vsio .= pack("nn", $DOCSIS_OPT_DEVICE_ID, length($docsis_device_id));
 100 $vsio .= $docsis_device_id;
 101
 102 $msg->add_option($OPT_VENDOR_OPTS, $vsio);
 103
 104 # add Rapid Commit option (required by DOCSIS)
 105 $msg->add_option($OPT_RAPID_COMMIT, "");
 106
 107 # timeout parameters, from DOCSIS
 108 my $IRT = $SOL_TIMEOUT;
 109 my $MRT = $SOL_MAX_RT;
 110 my $MRC = 4;    # DOCSIS says 4, RFC 3315 says it SHOULD be 0
 111 my $MRD = 0;
 112
 113 # sleep a random amount of time between 0 and 1 second, required by RFC 3315
 114 # XXX: this seems pretty stupid
 115 sleep(rand($SOL_MAX_DELAY));
 116
 117 my $RT;
 118 my $count = 0;
 119 my $mrd_end_time;
 120 if ($MRD != 0) {
 121         $mrd_end_time = time() + $MRD;
 122 }
 123 my $reply_msg;
 124 do {
 125         # create our socket, and send our Solicit
 126         socket(SOCK, PF_INET6, SOCK_DGRAM, getprotobyname('udp')) || die;
 127         my $addr = inet_pton(AF_INET6, $All_DHCP_Servers);
 128         my $packet = $msg->packet();
 129         my $send_ret = send(SOCK, $packet, 0,
 130                             pack_sockaddr_in6($server_port, $addr));
 131         if (not defined($send_ret)) {
 132                 printf STDERR
 133                         "Error \%d sending DHCPv6 Solicit message;\n\%s\n",
 134                         0+$ERRNO, $ERRNO;
 135                 exit(1);
 136         } elsif ($send_ret != length($packet)) {
 137                 print STDERR "Unable to send entire DHCPv6 Solicit message.\n";
 138                 exit(1);
 139         }
 140         $count++;
 141
 142         my $RAND = rand(0.2) - 0.1;
 143         if (defined $RT) {
 144                 $RT = 2*$RT + $RAND*$RT;
 145                 if (($RT > $MRT) && ($MRT != 0)) {
 146                         $RT = $MRT + $RAND*$RT;
 147                 }
 148         } else {
 149                 $RT = $IRT + $RAND*$IRT;
 150         }
 151
 152         my $rt_end_time = time() + $RT;
 153         if (defined($mrd_end_time) && ($mrd_end_time > $rt_end_time)) {
 154                 $rt_end_time = $mrd_end_time;
 155         }
 156
 157         for (;;) {
 158                 my $timeout = $rt_end_time - time();
 159                 if ($timeout < 0) {
 160 #                       print STDERR "Timeout waiting for DHCPv6 Advertise ",
 161 #                               "or Reply message.\n";
 162                         last;
 163                 }
 164
 165                 my @ready = IO::Select->new(\*SOCK)->can_read($timeout);
 166
 167                 if (@ready) {
 168                         my $reply;
 169                         my $recv_ret;
 170
 171                         $recv_ret = recv(SOCK, $reply, 1500, 0);
 172                         if (not defined $recv_ret) {
 173                                 printf STDERR
 174                                         "Error \%d receiving DHCPv6 " .
 175                                                 "message;\n\%s\n",
 176                                         0+$ERRNO, $ERRNO;
 177                                 exit(1);
 178                         }
 179
 180                         $reply_msg = dhcp_client::msg::decode($reply, 1);
 181                         if (($reply_msg->{msg_type} == $MSG_ADVERTISE) ||
 182                             ($reply_msg->{msg_type} == $MSG_REPLY)) {
 183                                 last;
 184                         }
 185                 }
 186         }
 187
 188 } until ($reply_msg ||
 189          (($MRC != 0) && ($count > $MRC)) ||
 190          (defined($mrd_end_time) && ($mrd_end_time > time())));
 191
 192 unless ($reply_msg) {
 193         if (($MRC != 0) && ($count >= $MRC)) {
 194                 print STDERR
 195                         "No reply after maximum retransmission count.\n";
 196         } else {
 197                 print STDERR
 198                         "No reply after maximum retransmission duration.\n";
 199         }
 200 }
 201
 202 if ($reply_msg && ($reply_msg->{msg_type} == $MSG_REPLY)) {
 203         print "Got DHCPv6 Reply message.\n";
 204         exit(0);
 205 }
 206
 207 #$Data::Dumper::Useqq = 1;
 208 #print Dumper($msg), "\n";
 209 #print Dumper($msg->packet()), "\n";
 210 #
 211 #print "packet length: ", length($msg->packet()), "\n";