tests/DHCPv6/292-decline-no-address.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_DECLINE);
  60
  61 # add the Client Identifier (required by DOCSIS and RFC 3315)
  62 $msg->add_option($OPT_CLIENTID, dhcp_client::duid());
  63
  64 # add the Server identifier (required by RFC 3315)
  65 $msg->add_option($OPT_SERVERID, "InfiniteEntropy");
  66
  67 # add Elapsed Time, set to 0 on first packet (required by RFC 3315)
  68 $msg->add_option($OPT_ELAPSED_TIME, "\x00\x00");
  69
  70 # add IA_NA for each interface (required by DOCSIS and RFC 3315)
  71 # XXX: should this be a single interface only?
  72 my $iaid = 0;
  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);
  76 }
  77
  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
  82 my $MRD = 0;
  83
  84 # sleep a random amount of time between 0 and 1 second, required by RFC 3315
  85 # XXX: this seems pretty stupid
  86 sleep(rand($SOL_MAX_DELAY));
  87
  88 my $RT;
  89 my $count = 0;
  90 my $mrd_end_time;
  91 if ($MRD != 0) {
  92         $mrd_end_time = time() + $MRD;
  93 }
  94 my $reply_msg;
  95 do {
  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)) {
 103                 printf STDERR
 104                         "Error \%d sending DHCPv6 Solicit message;\n\%s\n",
 105                         0+$ERRNO, $ERRNO;
 106                 exit(1);
 107         } elsif ($send_ret != length($packet)) {
 108                 print STDERR "Unable to send entire DHCPv6 Solicit message.\n";
 109                 exit(1);
 110         }
 111         $count++;
 112
 113         my $RAND = rand(0.2) - 0.1;
 114         if (defined $RT) {
 115                 $RT = 2*$RT + $RAND*$RT;
 116                 if (($RT > $MRT) && ($MRT != 0)) {
 117                         $RT = $MRT + $RAND*$RT;
 118                 }
 119         } else {
 120                 $RT = $IRT + $RAND*$IRT;
 121         }
 122
 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;
 126         }
 127
 128         for (;;) {
 129                 my $timeout = $rt_end_time - time();
 130                 if ($timeout < 0) {
 131 #                       print STDERR "Timeout waiting for DHCPv6 Advertise ",
 132 #                               "or Reply message.\n";
 133                         last;
 134                 }
 135
 136                 my @ready = IO::Select->new(\*SOCK)->can_read($timeout);
 137
 138                 if (@ready) {
 139                         my $reply;
 140                         my $recv_ret;
 141
 142                         $recv_ret = recv(SOCK, $reply, 1500, 0);
 143                         if (not defined $recv_ret) {
 144                                 printf STDERR
 145                                         "Error \%d receiving DHCPv6 " .
 146                                                 "message;\n\%s\n",
 147                                         0+$ERRNO, $ERRNO;
 148                                 exit(1);
 149                         }
 150
 151                         $reply_msg = dhcp_client::msg::decode($reply, 1);
 152                         if (($reply_msg->{msg_type} == $MSG_ADVERTISE) ||
 153                             ($reply_msg->{msg_type} == $MSG_REPLY)) {
 154                                 last;
 155                         }
 156                 }
 157         }
 158
 159 } until ($reply_msg ||
 160          (($MRC != 0) && ($count > $MRC)) ||
 161          (defined($mrd_end_time) && ($mrd_end_time > time())));
 162
 163 unless ($reply_msg) {
 164         if (($MRC != 0) && ($count >= $MRC)) {
 165                 print STDERR
 166                         "No reply after maximum retransmission count.\n";
 167         } else {
 168                 print STDERR
 169                         "No reply after maximum retransmission duration.\n";
 170         }
 171 }
 172
 173 if ($reply_msg && ($reply_msg->{msg_type} == $MSG_REPLY)) {
 174         print "Got DHCPv6 Reply message.\n";
 175         exit(0);
 176 }
 177
 178 #$Data::Dumper::Useqq = 1;
 179 #print Dumper($msg), "\n";
 180 #print Dumper($msg->packet()), "\n";
 181 #
 182 #print "packet length: ", length($msg->packet()), "\n";