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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: ! 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_REQUEST); ! 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 DOCSIS and RFC 3315) ! 65: # but use *our* DUID ! 66: $msg->add_option($OPT_SERVERID, dhcp_client::duid()); ! 67: ! 68: # add Elapsed Time, set to 0 on first packet (required by RFC 3315) ! 69: $msg->add_option($OPT_ELAPSED_TIME, "\x00\x00"); ! 70: ! 71: # add IA_NA for each interface (required by DOCSIS and RFC 3315) ! 72: # XXX: should this be a single interface only? ! 73: my $iaid = 0; ! 74: foreach my $iface (dhcp_client::iface()) { ! 75: my $option_data = pack("NNN", ++$iaid, 0, 0); ! 76: $msg->add_option($OPT_IA_NA, $option_data); ! 77: } ! 78: ! 79: # add Reconfigure Accept (required by DOCSIS) ! 80: $msg->add_option($OPT_RECONF_ACCEPT, ""); ! 81: ! 82: # add Options Request (required by DOCSIS, recommended by RFC 3315) ! 83: my @oro = ( $OPT_TIME_SERVERS, $OPT_TIME_OFFSET ); ! 84: $msg->add_option($OPT_ORO, pack("n*", @oro)); ! 85: ! 86: ! 87: # add Vendor Class option (required by DOCSIS) ! 88: $msg->add_option($OPT_VENDOR_CLASS, pack("N", 4491) . "docsis3.0"); ! 89: ! 90: # add Vendor-specific Information Option option (required by DOCSIS) ! 91: my $vsio = pack("N", 4491); ! 92: ! 93: # ORO (required by DOCSIS) ! 94: my @docsis_oro = ( $DOCSIS_OPT_TFTP_SERVERS ); ! 95: $vsio .= pack("nnC*", $DOCSIS_OPT_ORO, 0+@docsis_oro, @docsis_oro); ! 96: ! 97: # TLV5 data: CMTS DOCSIS version number 3.0 (required by DOCSIS) ! 98: my $tlv5_data = "\x01\x02\x03\x0"; ! 99: $vsio .= pack("nn", $DOCSIS_OPT_TLV5, length($tlv5_data)) . $tlv5_data; ! 100: ! 101: # DOCSIS Device (required by DOCSIS) ! 102: my $docsis_device_id = dhcp_client::mac_addr_binary(); ! 103: $vsio .= pack("nn", $DOCSIS_OPT_DEVICE_ID, length($docsis_device_id)); ! 104: $vsio .= $docsis_device_id; ! 105: ! 106: $msg->add_option($OPT_VENDOR_OPTS, $vsio); ! 107: ! 108: # add Rapid Commit option (required by DOCSIS) ! 109: $msg->add_option($OPT_RAPID_COMMIT, ""); ! 110: ! 111: # timeout parameters, from DOCSIS ! 112: my $IRT = $SOL_TIMEOUT; ! 113: my $MRT = $SOL_MAX_RT; ! 114: my $MRC = 1; # DOCSIS says 4, RFC 3315 says it SHOULD be 0 ! 115: my $MRD = 0; ! 116: ! 117: # sleep a random amount of time between 0 and 1 second, required by RFC 3315 ! 118: # XXX: this seems pretty stupid ! 119: sleep(rand($SOL_MAX_DELAY)); ! 120: ! 121: my $RT; ! 122: my $count = 0; ! 123: my $mrd_end_time; ! 124: if ($MRD != 0) { ! 125: $mrd_end_time = time() + $MRD; ! 126: } ! 127: my $reply_msg; ! 128: do { ! 129: # create our socket, and send our Solicit ! 130: socket(SOCK, PF_INET6, SOCK_DGRAM, getprotobyname('udp')) || die; ! 131: my $addr = inet_pton(AF_INET6, $All_DHCP_Servers); ! 132: my $packet = $msg->packet(); ! 133: my $send_ret = send(SOCK, $packet, 0, ! 134: pack_sockaddr_in6($server_port, $addr)); ! 135: if (not defined($send_ret)) { ! 136: printf STDERR ! 137: "Error \%d sending DHCPv6 Solicit message;\n\%s\n", ! 138: 0+$ERRNO, $ERRNO; ! 139: exit(1); ! 140: } elsif ($send_ret != length($packet)) { ! 141: print STDERR "Unable to send entire DHCPv6 Solicit message.\n"; ! 142: exit(1); ! 143: } ! 144: $count++; ! 145: ! 146: my $RAND = rand(0.2) - 0.1; ! 147: if (defined $RT) { ! 148: $RT = 2*$RT + $RAND*$RT; ! 149: if (($RT > $MRT) && ($MRT != 0)) { ! 150: $RT = $MRT + $RAND*$RT; ! 151: } ! 152: } else { ! 153: $RT = $IRT + $RAND*$IRT; ! 154: } ! 155: ! 156: my $rt_end_time = time() + $RT; ! 157: if (defined($mrd_end_time) && ($mrd_end_time > $rt_end_time)) { ! 158: $rt_end_time = $mrd_end_time; ! 159: } ! 160: ! 161: for (;;) { ! 162: my $timeout = $rt_end_time - time(); ! 163: if ($timeout < 0) { ! 164: # print STDERR "Timeout waiting for DHCPv6 Advertise ", ! 165: # "or Reply message.\n"; ! 166: last; ! 167: } ! 168: ! 169: my @ready = IO::Select->new(\*SOCK)->can_read($timeout); ! 170: ! 171: if (@ready) { ! 172: my $reply; ! 173: my $recv_ret; ! 174: ! 175: $recv_ret = recv(SOCK, $reply, 1500, 0); ! 176: if (not defined $recv_ret) { ! 177: printf STDERR ! 178: "Error \%d receiving DHCPv6 " . ! 179: "message;\n\%s\n", ! 180: 0+$ERRNO, $ERRNO; ! 181: exit(1); ! 182: } ! 183: ! 184: $reply_msg = dhcp_client::msg::decode($reply); ! 185: if (($reply_msg->{msg_type} == $MSG_ADVERTISE) || ! 186: ($reply_msg->{msg_type} == $MSG_REPLY)) { ! 187: last; ! 188: } ! 189: } ! 190: } ! 191: ! 192: } until ($reply_msg || ! 193: (($MRC != 0) && ($count > $MRC)) || ! 194: (defined($mrd_end_time) && ($mrd_end_time > time()))); ! 195: ! 196: unless ($reply_msg) { ! 197: if (($MRC != 0) && ($count >= $MRC)) { ! 198: print STDERR ! 199: "No reply after maximum retransmission count.\n"; ! 200: } else { ! 201: print STDERR ! 202: "No reply after maximum retransmission duration.\n"; ! 203: } ! 204: } ! 205: ! 206: if ($reply_msg && ($reply_msg->{msg_type} == $MSG_REPLY)) { ! 207: print "Got DHCPv6 Reply message.\n"; ! 208: exit(0); ! 209: } ! 210: ! 211: #$Data::Dumper::Useqq = 1; ! 212: #print Dumper($msg), "\n"; ! 213: #print Dumper($msg->packet()), "\n"; ! 214: # ! 215: #print "packet length: ", length($msg->packet()), "\n"; ! 216: