Annotation of embedaddon/dhcp/tests/DHCPv6/293-decline.pl, revision 1.1

1.1     ! misho       1: #! /usr/bin/perl -w
        !             2: 
        !             3: # Copyright (c) 2007,2009 by 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: #   950 Charter Street
        !            19: #   Redwood City, CA 94063
        !            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: my $client_id = "\x00\x01\x00\x01\x0c\x00\xa1\x41\x00\x06\x5b\x50\x99\xf6";
        !            63: $msg->add_option($OPT_CLIENTID, $client_id);
        !            64: #$msg->add_option($OPT_CLIENTID, dhcp_client::duid(3));
        !            65: 
        !            66: # add the Server identifier (required by RFC 3315)
        !            67: $msg->add_option($OPT_SERVERID, "InfiniteEntropy");
        !            68: 
        !            69: # add Elapsed Time, set to 0 on first packet (required by RFC 3315)
        !            70: $msg->add_option($OPT_ELAPSED_TIME, "\x00\x00");
        !            71: 
        !            72: # add IA_NA for each interface (required by DOCSIS and RFC 3315)
        !            73: # XXX: should this be a single interface only?
        !            74: my $iaid = 0;
        !            75: foreach my $iface (dhcp_client::iface()) {
        !            76:         my $iaaddr_option = inet_pton(AF_INET6, "3ffe:aaaa:aaaa:aaaa::ffff");
        !            77:         $iaaddr_option .= pack("NN", 0, 0);
        !            78:         my $option_data = pack("NNN", ++$iaid, 0, 0);
        !            79:         $option_data .= pack("nn", $OPT_IAADDR, length($iaaddr_option)-8);
        !            80:         $option_data .= $iaaddr_option;
        !            81:         $msg->add_option($OPT_IA_NA, $option_data);
        !            82: }
        !            83: 
        !            84: # timeout parameters, from DOCSIS
        !            85: my $IRT = $SOL_TIMEOUT;
        !            86: my $MRT = $SOL_MAX_RT;
        !            87: my $MRC = 4;   # DOCSIS says 4, RFC 3315 says it SHOULD be 0
        !            88: my $MRD = 0;
        !            89: 
        !            90: # sleep a random amount of time between 0 and 1 second, required by RFC 3315
        !            91: # XXX: this seems pretty stupid
        !            92: sleep(rand($SOL_MAX_DELAY));
        !            93: 
        !            94: my $RT;
        !            95: my $count = 0;
        !            96: my $mrd_end_time;
        !            97: if ($MRD != 0) {
        !            98:        $mrd_end_time = time() + $MRD;
        !            99: }
        !           100: my $reply_msg;
        !           101: do {
        !           102:        # create our socket, and send our Solicit
        !           103:        socket(SOCK, PF_INET6, SOCK_DGRAM, getprotobyname('udp')) || die;
        !           104:        my $addr = inet_pton(AF_INET6, $All_DHCP_Servers);
        !           105:        my $packet = $msg->packet();
        !           106:        my $send_ret = send(SOCK, $packet, 0, 
        !           107:                            pack_sockaddr_in6($server_port, $addr));
        !           108:        if (not defined($send_ret)) {
        !           109:                printf STDERR 
        !           110:                        "Error \%d sending DHCPv6 Solicit message;\n\%s\n",
        !           111:                        0+$ERRNO, $ERRNO;
        !           112:                exit(1);
        !           113:        } elsif ($send_ret != length($packet)) {
        !           114:                print STDERR "Unable to send entire DHCPv6 Solicit message.\n";
        !           115:                exit(1);
        !           116:        }
        !           117:        $count++;
        !           118: 
        !           119:        my $RAND = rand(0.2) - 0.1;
        !           120:        if (defined $RT) {
        !           121:                $RT = 2*$RT + $RAND*$RT;
        !           122:                if (($RT > $MRT) && ($MRT != 0)) {
        !           123:                        $RT = $MRT + $RAND*$RT;
        !           124:                }
        !           125:        } else {
        !           126:                $RT = $IRT + $RAND*$IRT;
        !           127:        }
        !           128: 
        !           129:        my $rt_end_time = time() + $RT;
        !           130:        if (defined($mrd_end_time) && ($mrd_end_time > $rt_end_time)) { 
        !           131:                $rt_end_time = $mrd_end_time;
        !           132:        }
        !           133: 
        !           134:        for (;;) {
        !           135:                my $timeout = $rt_end_time - time();
        !           136:                if ($timeout < 0) {
        !           137: #                      print STDERR "Timeout waiting for DHCPv6 Advertise ",
        !           138: #                              "or Reply message.\n";
        !           139:                        last;
        !           140:                }
        !           141: 
        !           142:                my @ready = IO::Select->new(\*SOCK)->can_read($timeout);
        !           143: 
        !           144:                if (@ready) {
        !           145:                        my $reply;
        !           146:                        my $recv_ret;
        !           147:        
        !           148:                        $recv_ret = recv(SOCK, $reply, 1500, 0);
        !           149:                        if (not defined $recv_ret) {
        !           150:                                printf STDERR 
        !           151:                                        "Error \%d receiving DHCPv6 " . 
        !           152:                                                "message;\n\%s\n",
        !           153:                                        0+$ERRNO, $ERRNO;
        !           154:                                exit(1);
        !           155:                        }
        !           156: 
        !           157:                        $reply_msg = dhcp_client::msg::decode($reply, 1);
        !           158:                        if (($reply_msg->{msg_type} == $MSG_ADVERTISE) ||
        !           159:                            ($reply_msg->{msg_type} == $MSG_REPLY)) {
        !           160:                                last;
        !           161:                        }
        !           162:                }
        !           163:        }
        !           164: 
        !           165: } until ($reply_msg || 
        !           166:         (($MRC != 0) && ($count > $MRC)) ||
        !           167:         (defined($mrd_end_time) && ($mrd_end_time > time())));
        !           168: 
        !           169: unless ($reply_msg) {
        !           170:        if (($MRC != 0) && ($count >= $MRC)) {
        !           171:                print STDERR 
        !           172:                        "No reply after maximum retransmission count.\n";
        !           173:        } else {
        !           174:                print STDERR 
        !           175:                        "No reply after maximum retransmission duration.\n";
        !           176:        }
        !           177: }
        !           178: 
        !           179: if ($reply_msg && ($reply_msg->{msg_type} == $MSG_REPLY)) {
        !           180:        print "Got DHCPv6 Reply message.\n";
        !           181:        exit(0);
        !           182: }
        !           183: 
        !           184: #$Data::Dumper::Useqq = 1;
        !           185: #print Dumper($msg), "\n";
        !           186: #print Dumper($msg->packet()), "\n";
        !           187: #
        !           188: #print "packet length: ", length($msg->packet()), "\n";
        !           189: 

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