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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: $Data::Dumper::Useqq = 1; ! 35: ! 36: # not-yet-standard options ! 37: my $OPT_TIME_SERVERS = 40; ! 38: my $OPT_TIME_OFFSET = 41; ! 39: ! 40: # DOCSIS sub-options ! 41: my $DOCSIS_OPT_ORO = 1; ! 42: # 2 to 31 are reserved ! 43: my $DOCSIS_OPT_TFTP_SERVERS = 32; ! 44: my $DOCSIS_OPT_CONFIG_FILE_NAME = 33; ! 45: my $DOCSIS_OPT_SYSLOG_SERVERS = 34; ! 46: my $DOCSIS_OPT_TLV5 = 35; ! 47: my $DOCSIS_OPT_DEVICE_ID = 36; ! 48: my $DOCSIS_OPT_CCC = 37; ! 49: my $DOCSIS_OPT_VERS = 38; ! 50: ! 51: # well-known addresses ! 52: my $All_DHCP_Relay_Agents_and_Servers = "ff02::1:2"; ! 53: my $All_DHCP_Servers = "ff05::1:3"; ! 54: ! 55: # ports ! 56: my $client_port = 546; ! 57: my $server_port = 547; ! 58: ! 59: # create a new Solicit message ! 60: my $msg = dhcp_client::msg->new($MSG_SOLICIT); ! 61: ! 62: # add the Client Identifier (required by DOCSIS and RFC 3315) ! 63: my $client_id = "\x00\x01\x00\x01\x0c\x00\xa1\x41\x00\x06\x5b\x50\x99\xf6"; ! 64: $msg->add_option($OPT_CLIENTID, $client_id); ! 65: #$msg->add_option($OPT_CLIENTID, dhcp_client::duid()); ! 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: my $enc_opt = dhcp_client::msg->new(0); ! 76: $enc_opt->add_option($OPT_CLIENTID, $client_id); ! 77: $option_data .= $enc_opt->packed_options(); ! 78: $msg->add_option($OPT_IA_NA, $option_data); ! 79: } ! 80: ! 81: # add Reconfigure Accept (required by DOCSIS) ! 82: $msg->add_option($OPT_RECONF_ACCEPT, ""); ! 83: ! 84: # add Options Request (required by DOCSIS, recommended by RFC 3315) ! 85: my @oro = ( $OPT_TIME_SERVERS, $OPT_TIME_OFFSET ); ! 86: $msg->add_option($OPT_ORO, pack("n*", @oro)); ! 87: ! 88: # add Vendor Class option (required by DOCSIS) ! 89: $msg->add_option($OPT_VENDOR_CLASS, pack("N", 4491) . "docsis3.0"); ! 90: ! 91: # add Vendor-specific Information Option option (required by DOCSIS) ! 92: my $vsio = pack("N", 4491); ! 93: ! 94: # ORO (required by DOCSIS) ! 95: my @docsis_oro = ( $DOCSIS_OPT_TFTP_SERVERS ); ! 96: $vsio .= pack("nnC*", $DOCSIS_OPT_ORO, 0+@docsis_oro, @docsis_oro); ! 97: ! 98: # TLV5 data: CMTS DOCSIS version number 3.0 (required by DOCSIS) ! 99: my $tlv5_data = "\x01\x02\x03\x0"; ! 100: $vsio .= pack("nn", $DOCSIS_OPT_TLV5, length($tlv5_data)) . $tlv5_data; ! 101: ! 102: # DOCSIS Device (required by DOCSIS) ! 103: my $docsis_device_id = dhcp_client::mac_addr_binary(); ! 104: $vsio .= pack("nn", $DOCSIS_OPT_DEVICE_ID, length($docsis_device_id)); ! 105: $vsio .= $docsis_device_id; ! 106: ! 107: $msg->add_option($OPT_VENDOR_OPTS, $vsio); ! 108: ! 109: # add Rapid Commit option (required by DOCSIS) ! 110: $msg->add_option($OPT_RAPID_COMMIT, ""); ! 111: ! 112: # timeout parameters, from DOCSIS ! 113: my $IRT = $SOL_TIMEOUT; ! 114: my $MRT = $SOL_MAX_RT; ! 115: my $MRC = 4; # DOCSIS says 4, RFC 3315 says it SHOULD be 0 ! 116: my $MRD = 0; ! 117: ! 118: # sleep a random amount of time between 0 and 1 second, required by RFC 3315 ! 119: # XXX: this seems pretty stupid ! 120: sleep(rand($SOL_MAX_DELAY)); ! 121: ! 122: my $RT; ! 123: my $count = 0; ! 124: my $mrd_end_time; ! 125: if ($MRD != 0) { ! 126: $mrd_end_time = time() + $MRD; ! 127: } ! 128: my $reply_msg; ! 129: do { ! 130: # create our socket, and send our Solicit ! 131: socket(SOCK, PF_INET6, SOCK_DGRAM, getprotobyname('udp')) || die; ! 132: my $addr = inet_pton(AF_INET6, $All_DHCP_Servers); ! 133: my $packet = $msg->packet(); ! 134: my $send_ret = send(SOCK, $packet, 0, ! 135: pack_sockaddr_in6($server_port, $addr)); ! 136: if (not defined($send_ret)) { ! 137: printf STDERR ! 138: "Error \%d sending DHCPv6 Solicit message;\n\%s\n", ! 139: 0+$ERRNO, $ERRNO; ! 140: exit(1); ! 141: } elsif ($send_ret != length($packet)) { ! 142: print STDERR "Unable to send entire DHCPv6 Solicit message.\n"; ! 143: exit(1); ! 144: } ! 145: $count++; ! 146: ! 147: my $RAND = rand(0.2) - 0.1; ! 148: if (defined $RT) { ! 149: $RT = 2*$RT + $RAND*$RT; ! 150: if (($RT > $MRT) && ($MRT != 0)) { ! 151: $RT = $MRT + $RAND*$RT; ! 152: } ! 153: } else { ! 154: $RT = $IRT + $RAND*$IRT; ! 155: } ! 156: ! 157: my $rt_end_time = time() + $RT; ! 158: if (defined($mrd_end_time) && ($mrd_end_time > $rt_end_time)) { ! 159: $rt_end_time = $mrd_end_time; ! 160: } ! 161: ! 162: for (;;) { ! 163: my $timeout = $rt_end_time - time(); ! 164: if ($timeout < 0) { ! 165: # print STDERR "Timeout waiting for DHCPv6 Advertise ", ! 166: # "or Reply message.\n"; ! 167: last; ! 168: } ! 169: ! 170: my @ready = IO::Select->new(\*SOCK)->can_read($timeout); ! 171: ! 172: if (@ready) { ! 173: my $reply; ! 174: my $recv_ret; ! 175: ! 176: $recv_ret = recv(SOCK, $reply, 1500, 0); ! 177: if (not defined $recv_ret) { ! 178: printf STDERR ! 179: "Error \%d receiving DHCPv6 " . ! 180: "message;\n\%s\n", ! 181: 0+$ERRNO, $ERRNO; ! 182: exit(1); ! 183: } ! 184: ! 185: $reply_msg = dhcp_client::msg::decode($reply, 1); ! 186: if (($reply_msg->{msg_type} == $MSG_ADVERTISE) || ! 187: ($reply_msg->{msg_type} == $MSG_REPLY)) { ! 188: last; ! 189: } ! 190: } ! 191: } ! 192: ! 193: } until ($reply_msg || ! 194: (($MRC != 0) && ($count > $MRC)) || ! 195: (defined($mrd_end_time) && ($mrd_end_time > time()))); ! 196: ! 197: unless ($reply_msg) { ! 198: if (($MRC != 0) && ($count >= $MRC)) { ! 199: print STDERR ! 200: "No reply after maximum retransmission count.\n"; ! 201: } else { ! 202: print STDERR ! 203: "No reply after maximum retransmission duration.\n"; ! 204: } ! 205: } ! 206: ! 207: if ($reply_msg && ($reply_msg->{msg_type} == $MSG_REPLY)) { ! 208: print "Got DHCPv6 Reply message.\n"; ! 209: #print Dumper($reply_msg), "\n"; ! 210: exit(0); ! 211: } ! 212: ! 213: #print Dumper($msg), "\n"; ! 214: #print Dumper($msg->packet()), "\n"; ! 215: # ! 216: #print "packet length: ", length($msg->packet()), "\n"; ! 217: