Parse down to icmp6_na_ns
This commit is contained in:
Nico Schottelius
parent
7db850a731
commit
f79033c0c9
437
doc/plan.org
437
doc/plan.org
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@ -111,8 +111,16 @@
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| | - Create p4lang/p4-spec bug | |
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| | https://github.com/p4lang/p4-spec/issues/745 | |
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| | | |
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| 2019-03-21 | Meet Laurent #4 | |
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| | - My dog ate my homework | |
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| 2019-03-21 | Meet Laurent #4 - post poned - sick | |
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| | https://github.com/p4lang/p4-spec/issues/660 sizeof() missing | |
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| | | |
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| | - Need to introduce new headers | |
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| | - Might need deeper parsing for icmp6_ns | |
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| | - Need hwaddr in icmp6_na | |
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| | - Need to find out how to handle imcp6 options after target address | |
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| | | |
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| 2019-03-28 | Meet Laurent #4 | |
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| | - Router solicitation for finding router on startup! | |
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| | - test.py for TDD | |
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| | - Parsing icmp6 is not enough - one layer deeper | |
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@ -164,6 +172,212 @@
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*** DONE Setup P4 base / structure
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*** DONE Create minimal controller for populating tables
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*** DONE Checkout / review egress settings
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*** TODO Implement ICMP <-> ICMP6 translation
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**** DONE Parse icmp
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**** DONE Parse icmpv6
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**** DONE Add (static) egress configuration
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**** DONE Calculate ICMP6 checksums in controller
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***** Need to include the payload!?!!
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**** DONE Implement minimal neighbor discovery in controller
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***** DONE For the switch
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****** DONE Register IPv6 address in table
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****** DONE Parse ICMPv6 up to neighbor solicitation -> no: checksum problem
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****** DONE Use NDP (Neighbor Solicitation (NDP) , Neighbor Advertisement (NDP)) -> no: controller
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****** Approach 2: use cpu header, forward information to controller
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****** DONE Fix the ip address match/mapping: 42 -> 2a -> use hex originally
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****** DONE Find out why wrong type is used -> overlapping with NDP
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DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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p=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:cpu = <CpuHeader task=DEBUG ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:Debug purpose only
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DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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p=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:cpu = <CpuHeader task=DEBUG ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:Debug purpose only
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DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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p=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:cpu = <CpuHeader task=DEBUG ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:Debug purpose only
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****** Disable debug by default -> gives correct packets
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DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:Doing neighbor solicitation
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DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:Doing neighbor solicitation
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DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
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DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:Doing neighbor solicitation
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***** DONE For other nodes -> multicast
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***** TODO Maybe implement link local addresses (missing at the moment)
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****** ff02::/??
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****** rfc4861
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"Neighbor Solicitation messages are multicast to the solicited-node
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multicast address of the target address."
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****** DONE multicasting / groups
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******* create a group ("node") that contains "all other" ports
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******* create a multicast group with an ID
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******* associate the "node" with the multicast group ID
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***** If destination is within ff02::1:ff00:0/104, multicast
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**** DONE Make switch answer icmp6 echo request for
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**** DONE Introduce mixed mode: switch: icmp6 echo reply, controller: NDP
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***** DONE try 1: reply seen, but checksum is incorrect
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***** DONE try 2: analysing tagya checksumming code
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static uint16_t ip6_checksum(struct ip6 *ip6, uint32_t data_len, uint8_t proto)
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{
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uint32_t sum = 0;
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uint16_t *p;
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int i;
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for (i = 0, p = ip6->src.s6_addr16; i < 16; ++i)
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sum += *p++;
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sum += htonl(data_len) >> 16;
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sum += htonl(data_len) & 0xffff;
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sum += htons(proto);
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while (sum > 0xffff)
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sum = (sum & 0xffff) + (sum >> 16);
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return ~sum;
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}
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static uint16_t convert_cksum(struct ip6 *ip6, struct ip4 *ip4)
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{
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uint32_t sum = 0;
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uint16_t *p;
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int i;
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sum += ~ip4->src.s_addr >> 16;
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sum += ~ip4->src.s_addr & 0xffff;
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sum += ~ip4->dest.s_addr >> 16;
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sum += ~ip4->dest.s_addr & 0xffff;
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for (i = 0, p = ip6->src.s6_addr16; i < 16; ++i)
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sum += *p++;
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while (sum > 0xffff)
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sum = (sum & 0xffff) + (sum >> 16);
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return sum;
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}
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...
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static int xlate_payload_4to6(struct pkt *p, struct ip6 *ip6)
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{
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uint16_t *tck;
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uint16_t cksum;
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if (p->ip4->flags_offset & htons(IP4_F_MASK))
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return 0;
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switch (p->data_proto) {
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case 1:
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cksum = ip6_checksum(ip6, htons(p->ip4->length) -
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p->header_len, 58);
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cksum = ones_add(p->icmp->cksum, cksum);
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if (p->icmp->type == 8) {
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p->icmp->type = 128;
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p->icmp->cksum = ones_add(cksum, ~(128 - 8));
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} else {
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p->icmp->type = 129;
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p->icmp->cksum = ones_add(cksum, ~(129 - 0));
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}
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return 0;
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**** DONE Add default route for v6 hosts
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p4@ubuntu:~/master-thesis$ mx h1 ip -6 r
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sudo: unable to resolve host ubuntu
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2001:db8::/64 dev h1-eth0 proto kernel metric 256 pref medium
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fe80::/64 dev h1-eth0 proto kernel metric 256 pref medium
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default via 2001:db8::42 dev h1-eth0 metric 1024 pref medium
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p4@ubuntu:~/master-thesis$
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**** Implement IPv4 side handling
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***** TODO Make switch answer icmp echo request for
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***** TODO Add default route for v4 hosts
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**** TODO Translate ipv6 --> ipv4 with a (freely programmable) prefix
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***** DONE Insert prefix into switch: v6_networks
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***** TODO Support multiple ipv6 source networks: need new table w/ 2 keys! -> later
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***** DONE Write test.py to generate correct destination packets
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>>> a = ipaddress.ip_network("2001:db8::/32")
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>>> b = ipaddress.ip_address("10.0.0.1")
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>>> a[int(b)]
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IPv6Address('2001:db8::a00:1')
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***** Using test.py, new NDP packets been seen, bur zero icmp on the outgoing side
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p4@ubuntu:~/master-thesis/p4app$ python test.py --method v6_static_mapping --debug
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INFO:main:Trying to reach 10.0.0.1 (64:ff9b::a00:1) from h1
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sudo: unable to resolve host ubuntu
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PING 64:ff9b::a00:1(64:ff9b::a00:1) 56 data bytes
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--- 64:ff9b::a00:1 ping statistics ---
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1 packets transmitted, 0 received, 100% packet loss, time 0ms
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p4@ubuntu:~/master-thesis/p4app$
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\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_GENERAL ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=2001:db8::42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x82b res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:INCOMING: <Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x02\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_GENERAL ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=2001:db8::42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x82b res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:INCOMING: <Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x02\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_GENERAL ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=2001:db8::42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x82b res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
|
||||
***** DONE Debug why neighbor discover does not work anymore
|
||||
****** log
|
||||
p4@ubuntu:~$ mx h1 tcpdump -lni any
|
||||
sudo: unable to resolve host ubuntu
|
||||
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
|
||||
listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
|
||||
|
||||
19:57:53.258805 IP6 fe80::200:aff:fe00:1 > ff02::1:ff00:42: ICMP6, neighbor solicitation, who has 2001:db8::42, length 32
|
||||
19:57:54.256924 IP6 2001:db8::1 > 2001:db8::1: ICMP6, destination unreachable, unreachable address 64:ff9b::a00:1, length 112
|
||||
|
||||
EBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x007\xdf\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x007\xdf\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x37df res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
INFO:main:Doing neighbor solicitation
|
||||
DEBUG:main:OUTGOING: <Ether dst=00:00:0a:00:00:01 src=00:00:0a:00:00:42 type=0x86dd |<IPv6 nh=ICMPv6 hlim=255 src=2001:db8::42 dst=fe80::200:aff:fe00:1 |<ICMPv6ND_NA cksum=None R=0 S=1 tgt=2001:db8::42 |<ICMPv6NDOptDstLLAddr lladdr=00:00:0a:00:00:42 |>>>>
|
||||
DEBUG:main:INCOMING: <Ether dst=00:00:0a:00:00:01
|
||||
src=00:00:0a:00:00:42 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32
|
||||
nh=ICMPv6 hlim=255 src=2001:db8::42
|
||||
dst=fe80::200:aff:fe00:1 |<ICMPv6ND_NA type=Neighbor Advertisement
|
||||
code=0 cksum=0xa5e9 R=0 S=1 O=1 res=0x0
|
||||
tgt=2001:db8::42 |<ICMPv6NDOptDstLLAddr type=2 len=1
|
||||
lladdr=00:00:0a:00:00:42 |>>>>
|
||||
|
||||
|
||||
After removing noise:
|
||||
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x37df res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x37df res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x13a7 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x13a7 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x13a7 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
|
||||
****** Do we have routing for fe80::/10? Probably not. Shouldn't we see it in the controller then?
|
||||
****** NDP is controller only!
|
||||
***** TODO Finish NDP in switch
|
||||
****** TODO Need to set R/S/O bits
|
||||
****** TODO Need to parse R/S/O bits
|
||||
***** TODO Maybe merge v6_address and v6_networks - /128 is the same
|
||||
***** TODO Implement address learning?
|
||||
***** TODO Not sure whether we should react on router solicitation
|
||||
- Using static routes -> should do the job
|
||||
***** TODO Implement the calculation
|
||||
***** TODO Sketch the flow for session handling for icmp6 w/o packet loss
|
||||
- switch receives icmp6 packet for known prefix
|
||||
- controller needs to create session entry (?)
|
||||
|
||||
**** TODO Translate icmp <-> icmp6
|
||||
**** TODO Create table entry for mapping v4->v6 [net]
|
||||
**** TODO Create table entry for mapping v6->v4 [net]
|
||||
*** TODO Get p4 VM / vagrant running
|
||||
**** DONE install libvirtd-daemon
|
||||
**** DONE install ebtables
|
||||
|
|
@ -598,212 +812,6 @@ strace: Process 20620 detached
|
|||
Please make sure that it is installed and available in your $PATH:
|
||||
(/home/nico/vcs/master-thesis/support/virtualenv-with-site/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/home/nico/vcs/master-thesis/support/p4c/build/)
|
||||
(virtualenv-with-site) root@line:/home/nico/vcs/master-thesis/p4app#
|
||||
*** TODO Implement ICMP <-> ICMP6 translation
|
||||
**** DONE Parse icmp
|
||||
**** DONE Parse icmpv6
|
||||
**** DONE Add (static) egress configuration
|
||||
**** DONE Calculate ICMP6 checksums in controller
|
||||
***** Need to include the payload!?!!
|
||||
**** DONE Implement minimal neighbor discovery in controller
|
||||
***** DONE For the switch
|
||||
****** DONE Register IPv6 address in table
|
||||
****** DONE Parse ICMPv6 up to neighbor solicitation -> no: checksum problem
|
||||
****** DONE Use NDP (Neighbor Solicitation (NDP) , Neighbor Advertisement (NDP)) -> no: controller
|
||||
****** Approach 2: use cpu header, forward information to controller
|
||||
****** DONE Fix the ip address match/mapping: 42 -> 2a -> use hex originally
|
||||
****** DONE Find out why wrong type is used -> overlapping with NDP
|
||||
DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
p=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=DEBUG ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:Debug purpose only
|
||||
DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
p=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=DEBUG ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:Debug purpose only
|
||||
DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
p=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x03\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=DEBUG ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:Debug purpose only
|
||||
****** Disable debug by default -> gives correct packets
|
||||
|
||||
DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:Doing neighbor solicitation
|
||||
DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:Doing neighbor solicitation
|
||||
DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x00\xd3\xa4\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:o=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd3a4 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:Doing neighbor solicitation
|
||||
|
||||
***** DONE For other nodes -> multicast
|
||||
***** TODO Maybe implement link local addresses (missing at the moment)
|
||||
****** ff02::/??
|
||||
****** rfc4861
|
||||
"Neighbor Solicitation messages are multicast to the solicited-node
|
||||
multicast address of the target address."
|
||||
****** DONE multicasting / groups
|
||||
******* create a group ("node") that contains "all other" ports
|
||||
******* create a multicast group with an ID
|
||||
******* associate the "node" with the multicast group ID
|
||||
***** If destination is within ff02::1:ff00:0/104, multicast
|
||||
|
||||
**** DONE Make switch answer icmp6 echo request for
|
||||
**** DONE Introduce mixed mode: switch: icmp6 echo reply, controller: NDP
|
||||
***** DONE try 1: reply seen, but checksum is incorrect
|
||||
***** DONE try 2: analysing tagya checksumming code
|
||||
static uint16_t ip6_checksum(struct ip6 *ip6, uint32_t data_len, uint8_t proto)
|
||||
{
|
||||
uint32_t sum = 0;
|
||||
uint16_t *p;
|
||||
int i;
|
||||
|
||||
for (i = 0, p = ip6->src.s6_addr16; i < 16; ++i)
|
||||
sum += *p++;
|
||||
sum += htonl(data_len) >> 16;
|
||||
sum += htonl(data_len) & 0xffff;
|
||||
sum += htons(proto);
|
||||
|
||||
while (sum > 0xffff)
|
||||
sum = (sum & 0xffff) + (sum >> 16);
|
||||
|
||||
return ~sum;
|
||||
}
|
||||
|
||||
static uint16_t convert_cksum(struct ip6 *ip6, struct ip4 *ip4)
|
||||
{
|
||||
uint32_t sum = 0;
|
||||
uint16_t *p;
|
||||
int i;
|
||||
|
||||
sum += ~ip4->src.s_addr >> 16;
|
||||
sum += ~ip4->src.s_addr & 0xffff;
|
||||
sum += ~ip4->dest.s_addr >> 16;
|
||||
sum += ~ip4->dest.s_addr & 0xffff;
|
||||
|
||||
for (i = 0, p = ip6->src.s6_addr16; i < 16; ++i)
|
||||
sum += *p++;
|
||||
|
||||
while (sum > 0xffff)
|
||||
sum = (sum & 0xffff) + (sum >> 16);
|
||||
|
||||
return sum;
|
||||
}
|
||||
...
|
||||
static int xlate_payload_4to6(struct pkt *p, struct ip6 *ip6)
|
||||
{
|
||||
uint16_t *tck;
|
||||
uint16_t cksum;
|
||||
|
||||
if (p->ip4->flags_offset & htons(IP4_F_MASK))
|
||||
return 0;
|
||||
|
||||
switch (p->data_proto) {
|
||||
case 1:
|
||||
cksum = ip6_checksum(ip6, htons(p->ip4->length) -
|
||||
p->header_len, 58);
|
||||
cksum = ones_add(p->icmp->cksum, cksum);
|
||||
if (p->icmp->type == 8) {
|
||||
p->icmp->type = 128;
|
||||
p->icmp->cksum = ones_add(cksum, ~(128 - 8));
|
||||
} else {
|
||||
p->icmp->type = 129;
|
||||
p->icmp->cksum = ones_add(cksum, ~(129 - 0));
|
||||
}
|
||||
return 0;
|
||||
**** DONE Add default route for v6 hosts
|
||||
p4@ubuntu:~/master-thesis$ mx h1 ip -6 r
|
||||
sudo: unable to resolve host ubuntu
|
||||
2001:db8::/64 dev h1-eth0 proto kernel metric 256 pref medium
|
||||
fe80::/64 dev h1-eth0 proto kernel metric 256 pref medium
|
||||
default via 2001:db8::42 dev h1-eth0 metric 1024 pref medium
|
||||
p4@ubuntu:~/master-thesis$
|
||||
**** Implement IPv4 side handling
|
||||
***** TODO Make switch answer icmp echo request for
|
||||
***** TODO Add default route for v4 hosts
|
||||
**** TODO Translate ipv6 --> ipv4 with a (freely programmable) prefix
|
||||
***** DONE Insert prefix into switch: v6_networks
|
||||
***** TODO Support multiple ipv6 source networks: need new table w/ 2 keys! -> later
|
||||
***** DONE Write test.py to generate correct destination packets
|
||||
>>> a = ipaddress.ip_network("2001:db8::/32")
|
||||
>>> b = ipaddress.ip_address("10.0.0.1")
|
||||
>>> a[int(b)]
|
||||
IPv6Address('2001:db8::a00:1')
|
||||
***** Using test.py, new NDP packets been seen, bur zero icmp on the outgoing side
|
||||
p4@ubuntu:~/master-thesis/p4app$ python test.py --method v6_static_mapping --debug
|
||||
INFO:main:Trying to reach 10.0.0.1 (64:ff9b::a00:1) from h1
|
||||
sudo: unable to resolve host ubuntu
|
||||
PING 64:ff9b::a00:1(64:ff9b::a00:1) 56 data bytes
|
||||
|
||||
--- 64:ff9b::a00:1 ping statistics ---
|
||||
1 packets transmitted, 0 received, 100% packet loss, time 0ms
|
||||
|
||||
p4@ubuntu:~/master-thesis/p4app$
|
||||
\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_GENERAL ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=2001:db8::42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x82b res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:INCOMING: <Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x02\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_GENERAL ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=2001:db8::42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x82b res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:INCOMING: <Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x02\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_GENERAL ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x87\x00\x08+\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=00:00:0a:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=2001:db8::42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x82b res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
|
||||
***** DONE Debug why neighbor discover does not work anymore
|
||||
****** log
|
||||
p4@ubuntu:~$ mx h1 tcpdump -lni any
|
||||
sudo: unable to resolve host ubuntu
|
||||
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
|
||||
listening on any, link-type LINUX_SLL (Linux cooked), capture size 262144 bytes
|
||||
|
||||
19:57:53.258805 IP6 fe80::200:aff:fe00:1 > ff02::1:ff00:42: ICMP6, neighbor solicitation, who has 2001:db8::42, length 32
|
||||
19:57:54.256924 IP6 2001:db8::1 > 2001:db8::1: ICMP6, destination unreachable, unreachable address 64:ff9b::a00:1, length 112
|
||||
|
||||
EBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x4242 |<Raw load='\x00\x01\x00\x01\x86\xdd`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x007\xdf\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:cpu = <CpuHeader task=ICMP6_NS ingress_port=1 type=0x86dd |<Raw load='`\x00\x00\x00\x00 :\xff\xfe\x80\x00\x00\x00\x00\x00\x00\x02\x00\n\xff\xfe\x00\x00\x01\xff\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xff\x00\x00B\x87\x007\xdf\x00\x00\x00\x00 \x01\r\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00B\x01\x01\x00\x00\n\x00\x00\x01' |>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x37df res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
INFO:main:Doing neighbor solicitation
|
||||
DEBUG:main:OUTGOING: <Ether dst=00:00:0a:00:00:01 src=00:00:0a:00:00:42 type=0x86dd |<IPv6 nh=ICMPv6 hlim=255 src=2001:db8::42 dst=fe80::200:aff:fe00:1 |<ICMPv6ND_NA cksum=None R=0 S=1 tgt=2001:db8::42 |<ICMPv6NDOptDstLLAddr lladdr=00:00:0a:00:00:42 |>>>>
|
||||
DEBUG:main:INCOMING: <Ether dst=00:00:0a:00:00:01
|
||||
src=00:00:0a:00:00:42 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32
|
||||
nh=ICMPv6 hlim=255 src=2001:db8::42
|
||||
dst=fe80::200:aff:fe00:1 |<ICMPv6ND_NA type=Neighbor Advertisement
|
||||
code=0 cksum=0xa5e9 R=0 S=1 O=1 res=0x0
|
||||
tgt=2001:db8::42 |<ICMPv6NDOptDstLLAddr type=2 len=1
|
||||
lladdr=00:00:0a:00:00:42 |>>>>
|
||||
|
||||
|
||||
After removing noise:
|
||||
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x37df res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x37df res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x13a7 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x13a7 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
DEBUG:main:reassambled=<Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=32 nh=ICMPv6 hlim=255 src=2001:db8::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0x13a7 res=0 tgt=2001:db8::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||
|
||||
****** Do we have routing for fe80::/10? Probably not. Shouldn't we see it in the controller then?
|
||||
****** NDP is controller only!
|
||||
***** TODO Finish NDP in switch
|
||||
****** TODO Need to set R/S/O bits
|
||||
****** TODO Need to parse R/S/O bits
|
||||
***** TODO Maybe merge v6_address and v6_networks - /128 is the same
|
||||
***** TODO Implement address learning?
|
||||
***** TODO Not sure whether we should react on router solicitation
|
||||
- Using static routes -> should do the job
|
||||
***** TODO Implement the calculation
|
||||
***** TODO Sketch the flow for session handling for icmp6 w/o packet loss
|
||||
- switch receives icmp6 packet for known prefix
|
||||
- controller needs to create session entry (?)
|
||||
|
||||
**** TODO Translate icmp <-> icmp6
|
||||
**** TODO Create table entry for mapping v4->v6 [net]
|
||||
**** TODO Create table entry for mapping v6->v4 [net]
|
||||
*** TODO Setup test VM [dual stack] for Jool:
|
||||
*** TODO Setup test VM [dual stack] for tayga:
|
||||
*** NAT64/NAT46 Features in jool and tayga
|
||||
|
|
@ -1204,7 +1212,18 @@ Currently offset based - probably not following the RFC!
|
|||
***** No DNS64
|
||||
has already been solved in a different domain - could even do
|
||||
transparent / in network modification
|
||||
|
||||
***** Incomplete NDP
|
||||
Very limited option support
|
||||
*** Setting up a system for working on P4 on devuan
|
||||
**** Scripts in the wild
|
||||
https://github.com/nsg-ethz/p4-learning/blob/master/vm/bin/update-p4c.sh
|
||||
https://github.com/jafingerhut/p4-guide/blob/master/bin/install-p4dev-p4runtime.sh
|
||||
https://github.com/nsg-ethz/p4-learning/tree/master/vm/bin
|
||||
**** mininet
|
||||
**** bmv2
|
||||
[21:24] line:~% sudo apt install libthrift-dev
|
||||
[21:26] line:~% sudo apt install thrift-compiler
|
||||
libnanomsg-dev libjudy-dev
|
||||
*** References / Follow up
|
||||
**** RFC 2460 IPv6 (Checksum https://tools.ietf.org/html/rfc2460#section-8.1)
|
||||
**** RFC 3810 MLD2 https://tools.ietf.org/html/rfc3810
|
||||
|
|
|
|||
|
|
@ -37,7 +37,7 @@ const task_t TASK_ICMP6_GENERAL = 2;
|
|||
const task_t TASK_DEBUG = 3;
|
||||
const task_t TASK_ICMP6_REPLY = 4;
|
||||
|
||||
|
||||
/* 48+48+16 = 112 */
|
||||
header ethernet_t {
|
||||
mac_addr_t dst_addr;
|
||||
mac_addr_t src_addr;
|
||||
|
|
@ -60,7 +60,10 @@ header ipv4_t {
|
|||
ipv4_addr_t dst_addr;
|
||||
}
|
||||
|
||||
/* https://en.wikipedia.org/wiki/IPv6_packet */
|
||||
/*
|
||||
https://en.wikipedia.org/wiki/IPv6_packet
|
||||
64 + 256 = 320
|
||||
*/
|
||||
header ipv6_t {
|
||||
bit<4> version;
|
||||
bit<8> traffic_class;
|
||||
|
|
@ -105,12 +108,25 @@ header icmp6_t {
|
|||
bit<16> checksum;
|
||||
}
|
||||
|
||||
/*
|
||||
https://tools.ietf.org/html/rfc4861#section-4.4
|
||||
*/
|
||||
header icmp6_na_ns_t {
|
||||
bit<1> router;
|
||||
bit<1> solicitated;
|
||||
bit<1> override;
|
||||
bit<29> reserved;
|
||||
ipv6_addr_t target_addr;
|
||||
}
|
||||
|
||||
header icmp_t {
|
||||
bit<8> type;
|
||||
bit<8> code;
|
||||
bit<16> checksum;
|
||||
bit<32> rest;
|
||||
}
|
||||
|
||||
|
||||
header cpu_t {
|
||||
task_t task;
|
||||
bit<16> ingress_port;
|
||||
|
|
@ -123,9 +139,10 @@ struct headers {
|
|||
ipv6_t ipv6;
|
||||
tcp_t tcp;
|
||||
udp_t udp;
|
||||
icmp6_t icmp6;
|
||||
icmp_t icmp;
|
||||
cpu_t cpu;
|
||||
icmp6_t icmp6;
|
||||
icmp6_na_ns_t icmp6_na_ns;
|
||||
}
|
||||
|
||||
struct metadata {
|
||||
|
|
|
|||
|
|
@ -46,17 +46,20 @@ parser MyParser(packet_in packet,
|
|||
}
|
||||
}
|
||||
|
||||
/*
|
||||
state icmp6 {
|
||||
packet.extract(hdr.icmp6);
|
||||
transition select(hdr.ipv6.next_header){
|
||||
ICMP6_NS:
|
||||
ICMP6_NS: icmp6_neighbor_solicitation;
|
||||
default: accept;
|
||||
}
|
||||
}
|
||||
state icmp6_neighbor_solicitation {
|
||||
|
||||
} */
|
||||
state icmp6_neighbor_solicitation {
|
||||
packet.extract(hdr.icmp6_na_ns);
|
||||
transition accept;
|
||||
|
||||
}
|
||||
|
||||
|
||||
/* Leaf */
|
||||
state tcp {
|
||||
|
|
@ -69,10 +72,10 @@ parser MyParser(packet_in packet,
|
|||
transition accept;
|
||||
}
|
||||
|
||||
state icmp6 {
|
||||
packet.extract(hdr.icmp6);
|
||||
transition accept;
|
||||
}
|
||||
// state icmp6 {
|
||||
// packet.extract(hdr.icmp6);
|
||||
// transition accept;
|
||||
// }
|
||||
|
||||
state icmp {
|
||||
packet.extract(hdr.icmp);
|
||||
|
|
@ -101,7 +104,10 @@ control MyDeparser(packet_out packet, in headers hdr) {
|
|||
packet.emit(hdr.tcp);
|
||||
packet.emit(hdr.udp);
|
||||
packet.emit(hdr.icmp);
|
||||
|
||||
/* might be more than one subtype */
|
||||
packet.emit(hdr.icmp6);
|
||||
packet.emit(hdr.icmp6_na);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -42,7 +42,7 @@ control MyIngress(inout headers hdr,
|
|||
standard_metadata.mcast_grp = mcast_grp;
|
||||
}
|
||||
|
||||
action icmp6_neighbor_solicitation(ipv6_addr_t addr) {
|
||||
action icmp6_neighbor_solicitation(ipv6_addr_t addr, mac_addr_t hwaddr) {
|
||||
/* egress = ingress */
|
||||
standard_metadata.egress_spec = standard_metadata.ingress_port;
|
||||
|
||||
|
|
@ -50,6 +50,16 @@ control MyIngress(inout headers hdr,
|
|||
hdr.ipv6.src_addr = addr;
|
||||
hdr.icmp6.type = ICMP6_NA;
|
||||
|
||||
/* ether + ipv6 + icmp6 */
|
||||
ipv6_addr_t tgt_addr =
|
||||
|
||||
truncate((bit<32>)(112 + 320 + 32)/8);
|
||||
hdr.icmp6_na.setValid();
|
||||
|
||||
hdr.icmp6_na.solicitated = 1;
|
||||
hdr.icmp6_na.override = 1;
|
||||
|
||||
|
||||
/* checksum trigger / content */
|
||||
meta.do_cksum = 1;
|
||||
meta.cast_length = (bit<32>) hdr.ipv6.payload_length;
|
||||
|
|
|
|||
Loading…
Reference in New Issue