#!/usr/bin/perl # # $Name: V6LC_4_0_1 $ # # Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 # Yokogawa Electric Corporation. # All rights reserved. # # Redistribution and use of this software in source and binary # forms, with or without modification, are permitted provided that # the following conditions and disclaimer are agreed and accepted # by the user: # # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in # the documentation and/or other materials provided with # the distribution. # # 3. Neither the names of the copyrighters, the name of the project # which is related to this software (hereinafter referred to as # "project") nor the names of the contributors may be used to # endorse or promote products derived from this software without # specific prior written permission. # # 4. No merchantable use may be permitted without prior written # notification to the copyrighters. # # 5. The copyrighters, the project and the contributors may prohibit # the use of this software at any time. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHTERS, THE PROJECT AND # CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING # BUT NOT LIMITED THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS # FOR A PARTICULAR PURPOSE, ARE DISCLAIMED. IN NO EVENT SHALL THE # COPYRIGHTERS, THE PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, # INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING # IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # # $Id: RAwithMTUreduce.seq,v 1.4 2005/04/11 09:05:56 akisada Exp $ # ###################################################################### BEGIN { $V6evalTool::TestVersion = '$Name: V6LC_4_0_1 $'; } use V6evalTool; use CommonPMTU; if ($V6evalTool::NutDef{'Type'} ne 'host') { vLogHTML("This test is only for the host
"); exit($V6evalTool::exitHostOnly); } $pktdesc{'echo_request1500'} = 'Send Echo Request (Packet size is 1500)'; $pktdesc{'echo_reply1500'} = 'Recv Echo Reply (Packet size is 1500)'; $pktdesc{'ra1280'} = 'Send Router Advertisement with MTU option (1280 octets)'; $pktdesc{'echo_request1280_1'} = 'Send Echo Request (Packet size is 1280, 1st fragment)'; $pktdesc{'echo_request1280_2'} = 'Send Echo Request (Packet size is 1280, 2nd fragment)'; $endStatus = $V6evalTool::exitPass; $IF = 'Link0'; #----- create Fragment ID $id = time & 0x00000fff; $fid = sprintf("0x0%07x", $id); #$rid = sprintf("0x0%03x", $id); #$sno = 0; #vCPP("-DSFRAG_ID=$fid -DREQ_ID=$rid -DSEQ_NO=$sno"); vCPP("-DSFRAG_ID=$fid"); vCapture($IF); #====================================================================== if (setup11($IF) != $CommonPMTU::Success) { $ret = cleanup($IF); if ($ret == $CommonPMTU::Success) { exit($V6evalTool::exitFail); } else { exit($V6evalTool::exitFatal); } } #====================================================================== #----- test #----- create fragment pkt.def $original_name = "echo_reply1500"; #must same echo reply packet $MTU_value = 1500; #MTU value, fixed $PKT_size = 1500; #this size is IPv6 pakcet size.,1280,1400,1500 etc $frag_start = 48; #1280 or 48 #should be 48 $data_size_1st = $frag_start - 40 - 8; $data_size_2nd = ($PKT_size - 40) - $data_size_1st; #define packet format $header_ether = '_HETHER_nut2tn'; $ip_src = 'NUT_GL0_ADDR'; $ip_dst = 'TN2_GL2_ADDR'; $def_file = 'pkt_frag.def'; #fragment define file #write def file if(writefragdef($def_file, $original_name, $MTU_value,$PKT_size,$data_size_1st,$data_size_2nd, $header_ether, $ip_src, $ip_dst ) != $CommonPMTU::Success) { exit($V6evalTool::exitFatal); } vCPP("-DFRAG_DEF -DFRAG_ID=any"); vSend($IF, 'echo_request1500'); %ret = nd_vRecv_EN($IF, $CommonPMTU::wait_reply, 0, 0, 'echo_reply1500',@CommonPMTU::fragment_1st_name); if ($ret{'status'} == 0) { if($ret{'recvFrame'} eq 'echo_reply1500'){ vLogHTML('OK
'); } else{ vLogHTML('OK. recive 1st fragment.
'); $pkt_name = $ret{'recvFrame'}; $pkt_name =~ /^echo_reply(\d+)_1st_(\d+)$/; $size_2nd_frag = $1-$2-40; $name_2nd_frag = "echo_reply$1"."_2nd_$size_2nd_frag"; %ret = nd_vRecv_EN($IF, $CommonPMTU::wait_reply, 0, 0, "$name_2nd_frag"); if ($ret{'status'} == 0) { vLogHTML('OK. recive 2nd fragment.
'); } else { vLogHTML('NG. can\'t recive 2nd fragment.
'); $endStatus = $V6evalTool::exitFail; } } }else { vLogHTML('Cannot receive Echo Reply
'); vLogHTML('NG
'); $endStatus = $V6evalTool::exitFail; } unlink($def_file); vSend($IF, 'ra1280'); #----- create fragment pkt.def $original_name = "echo_reply1500"; #must same echo reply packet $MTU_value = 1280; #MTU value, fixed $PKT_size = 1500; #this size is IPv6 pakcet size.,1280,1400,1500 etc $frag_start = 48; #1280 or 48 #should be 48 $data_size_1st = $frag_start - 40 - 8; $data_size_2nd = ($PKT_size - 40) - $data_size_1st; #define packet format $header_ether = '_HETHER_nut2tn'; $ip_src = 'NUT_GL0_ADDR'; $ip_dst = 'TN2_GL2_ADDR'; $def_file = 'pkt_frag.def'; #fragment define file #write def file if(writefragdef($def_file, $original_name, $MTU_value,$PKT_size,$data_size_1st,$data_size_2nd, $header_ether, $ip_src, $ip_dst ) != $CommonPMTU::Success) { exit($V6evalTool::exitFatal); } vCPP("-DFRAG_DEF -DFRAG_ID=any"); vSend($IF, 'echo_request1280_1'); vSend($IF, 'echo_request1280_2'); %ret = nd_vRecv_EN($IF, $CommonPMTU::wait_reply, 0, 0,@CommonPMTU::fragment_1st_name); if ($ret{'status'} == 0) { vLogHTML('OK. recive 1st fragment.
'); $pkt_name = $ret{'recvFrame'}; $pkt_name =~ /^echo_reply(\d+)_1st_(\d+)$/; $size_2nd_frag = $1-$2-40; $name_2nd_frag = "echo_reply$1"."_2nd_$size_2nd_frag"; %ret = nd_vRecv_EN($IF, $CommonPMTU::wait_reply, 0, 0, "$name_2nd_frag"); if ($ret{'status'} == 0) { vLogHTML('OK. recive 2nd fragment.
'); } else { vLogHTML('NG. can\'t recive 2nd fragment.
'); $endStatus = $V6evalTool::exitFail; } }else { vLogHTML('Cannot receive Echo Reply
'); vLogHTML('NG
'); $endStatus = $V6evalTool::exitFail; } unlink($def_file); #----- end test $ret = cleanup($IF); vStop($IF); if ($ret == $CommonPMTU::Success) { exit($endStatus); } else { exit($V6evalTool::exitFatal); } ###################################################################### __END__ =head1 NAME RAwithMTUreduce - Verify that a host properly processes a Router Advertisement with an MTU option =head1 TARGET Host =head1 SYNOPSIS =begin html 
  RAwithMTUreduce.seq [-tooloption ...] -pkt RAwithMTUreduce.def
    -tooloption : v6eval tool option
=end html =head1 INITIALIZATION TR1 send a Router Advertisment. And make state of Neighbor Cashe Entry for TN's addresses reachable. =head1 TEST PROCEDURE TN2 TR1 NUT | | | |-------------------------------------------->| | 1.Echo Request | | | (1500 octets) | | | | | |<--------------------------------------------| | 2.Echo Reply | | | (1500 octets) | | | | | | +--------------------->| | |3.Router Advertisemnt | | | (MTU 1280) | | | | |-------------------------------------------->| | 4.Fragmented Echo | | | Request | | | (1st + 2nd = 1500) | | |<--------------------------------------------| | 5.Fragment Echo Reply| | | (1st +2nd = 1500) | | | | | v v v 1. Send Echo Request (Paket size is 1500) 2. Receive Echo Reply (Paket size is 1500) <> 3. Send Router Advertisement (MTU is 1280) 4. Send fragmented Echo Request (1st + 2nd fragment = 1500 octets) 5. Receive fragmented Echo Reply (1st + 2nd fragment = 1500 octets) <> Echo Request Data is: IPv6 Header Version = 6 Traffic Class = 0 FlowLabel = 0 PayloadLength = 1460 NextHeader = 58 (ICMPv6) SourceAddress = TN2's Global Address DestinationAddress = NUT's Global Address ICMP Echo Request Type = 128 (Echo Request) Code = 0 Checksum = (auto) Identifier = 0xffff SequenceNumber = 1 PayloadData = (1452 octets) Router Advertisement is: IPv6 Header Version = 6 Traffic Class = 0 FlowLabel = 0 PayloadLength = 24 NextHeader = 58 (ICMPv6) SourceAddress = TR1's Global Address DestinationAddress = NUT's Global Address ICMP Router Advertisement Type = 134 (Router Advertisement) Code = 0 Checksum = (auto) CurHopLimit = 0 MFlag = 0 OFlag = 0 HFlag = 0 Preference = 0 Reserved = 0 LifeTime = 20 ReachableTime = 10000 RetransTimer = 1000 Option ICMP MTU Type = 5 (Router Advertisement) Length = 1 Reserved = 0 MTU = 1280 =head1 JUDGEMENT PASS: <> Echo Reply Received or Fragment Echo Reply Received <> Fragment Echo Reply Received. 1st and 2nd fragment no larger than 1280 octets. IPv6 Header Version = 6 Traffic Class = 0 FlowLabel = 0 PayloadLength = 1460 NextHeader = 58 (ICMPv6) SourceAddress = NUT's Global Address Destination Address = TN2's Global Address ICMP Echo Reply Type = 129 (Echo Reply) Code = 0 Checksum = (auto) Identifier = 0xffff (same as Echo Request) SequenceNumber = 1 (same as Echo Request) PayloadData = (1452 octets) (same as Echo Request) =cut # =head1 REFERENCE # # RFC2461 # # 4.2. Router Advertisement Message Format # # Routers send out Router Advertisement message periodically, or in # response to a Router Solicitation. # # 0 1 2 3 # 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ # | Type | Code | Checksum | # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ # | Cur Hop Limit |M|O| Reserved | Router Lifetime | # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ # | Reachable Time | # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ # | Retrans Timer | # +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ # | Options ... # +-+-+-+-+-+-+-+-+-+-+-+- # # IP Fields: # # Source Address # MUST be the link-local address assigned to the # interface from which this message is sent. # # Destination Address # Typically the Source Address of an invoking Router # Solicitation or the all-nodes multicast address. # # Hop Limit 255 # # Authentication Header # If a Security Association for the IP Authentication # Header exists between the sender and the # destination address, then the sender SHOULD include # this header. # # ICMP Fields: # # Type 134 # # Code 0 # # Checksum The ICMP checksum. See [ICMPv6]. # # Cur Hop Limit 8-bit unsigned integer. The default value that # should be placed in the Hop Count field of the IP # header for outgoing IP packets. A value of zero # means unspecified (by this router). # # M 1-bit "Managed address configuration" flag. When # set, hosts use the administered (stateful) protocol # for address autoconfiguration in addition to any # addresses autoconfigured using stateless address # autoconfiguration. The use of this flag is # described in [ADDRCONF]. # # O 1-bit "Other stateful configuration" flag. When # set, hosts use the administered (stateful) protocol # for autoconfiguration of other (non-address) # information. The use of this flag is described in # [ADDRCONF]. # # Reserved A 6-bit unused field. It MUST be initialized to # zero by the sender and MUST be ignored by the # receiver. # # Router Lifetime # 16-bit unsigned integer. The lifetime associated # with the default router in units of seconds. The # maximum value corresponds to 18.2 hours. A # Lifetime of 0 indicates that the router is not a # default router and SHOULD NOT appear on the default # router list. The Router Lifetime applies only to # the router's usefulness as a default router; it # does not apply to information contained in other # message fields or options. Options that need time # limits for their information include their own # lifetime fields. # # Reachable Time 32-bit unsigned integer. The time, in # milliseconds, that a node assumes a neighbor is # reachable after having received a reachability # confirmation. Used by the Neighbor Unreachability # Detection algorithm (see Section 7.3). A value of # zero means unspecified (by this router). # # Retrans Timer 32-bit unsigned integer. The time, in # milliseconds, between retransmitted Neighbor # Solicitation messages. Used by address resolution # and the Neighbor Unreachability Detection algorithm # (see Sections 7.2 and 7.3). A value of zero means # unspecified (by this router). # # Possible options: # # Source link-layer address # The link-layer address of the interface from which # the Router Advertisement is sent. Only used on # link layers that have addresses. A router MAY omit # this option in order to enable inbound load sharing # across multiple link-layer addresses. # # MTU SHOULD be sent on links that have a variable MTU # (as specified in the document that describes how to # run IP over the particular link type). MAY be sent # on other links. # # Prefix Information # These options specify the prefixes that are on-link # and/or are used for address autoconfiguration. A # router SHOULD include all its on-link prefixes # (except the link-local prefix) so that multihomed # hosts have complete prefix information about on- # link destinations for the links to which they # attach. If complete information is lacking, a # multihomed host may not be able to choose the # correct outgoing interface when sending traffic to # its neighbors. # # Future versions of this protocol may define new option types. # Receivers MUST silently ignore any options they do not recognize # and continue processing the message. # # (omit) # # 6.3.4. Processing Received Router Advertisements # # When multiple routers are present, the information advertised # collectively by all routers may be a superset of the information # contained in a single Router Advertisement. Moreover, information # may also be obtained through other dynamic means, such as stateful # autoconfiguration. Hosts accept the union of all received # information; the receipt of a Router Advertisement MUST NOT # invalidate all information received in a previous advertisement or # from another source. However, when received information for a # specific parameter (e.g., Link MTU) or option (e.g., Lifetime on a # specific Prefix) differs from information received earlier, and the # parameter/option can only have one value, the most recently-received # information is considered authoritative. # # (omit) # # If the MTU option is present, hosts SHOULD copy the option's value # into LinkMTU so long as the value is greater than or equal to the # minimum link MTU [IPv6] and does not exceed the default LinkMTU value # specified in the link type specific document (e.g., [IPv6-ETHER]). # # (omit) # =pod =head1 REFERENCE =begin html 
RFC 1981 - Path MTU Discovery for IPv6
=end html =head1 SEE ALSO perldoc V6evalTool =cut