[p4, controller] hack NDP reply
This commit is contained in:
Nico Schottelius
parent
2081d30136
commit
b29cf1a296
155
doc/plan.org
155
doc/plan.org
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@ -9,9 +9,9 @@
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| 2019-02-23 | python2 / ipaddress is buggy | x |
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| 2019-02-23 | python2 / ipaddress is buggy | x |
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| | p4utils is python2 only support | |
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| | p4utils is python2 only support | |
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| | bmpy_utils is not installable with pip | |
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| | bmpy_utils is not installable with pip | |
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| | python2 / latest ipaddress==1.0.22 still has the bug | |
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| | python2 / latest ipaddress==1.0.22 still has the bug | |
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| | ipaddress.ip_network("2001:db8:61::/64") | |
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| | ipaddress.ip_network("2001:db8:61::/64") | |
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| | IPv6Network(u'3230:3031:3a64:6238:3a36:313a:3a2f:3634/128') | |
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| | IPv6Network(u'3230:3031:3a64:6238:3a36:313a:3a2f:3634/128') | |
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| | egress routing | x |
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| | egress routing | x |
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@ -20,7 +20,21 @@
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| 2019-02-28 | Meet Laurent #2 | |
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| 2019-02-28 | Meet Laurent #2 | |
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| | - Setup base code | |
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| | - Parser for all protocols (udp,tcp,icmp,icmp6) | |
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| | - Parser for all protocols (udp,tcp,icmp,icmp6) | |
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| | - Started with icmp translation | |
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| | - Investigating into IPv6 based checksums | |
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| | - Some issues with python2 (ipaddr) - slowing down | |
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| | - Reading into various RFCs, NDP, MLD | |
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| | - Reading about multicast / trying to figure out dynamic membership | |
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| | - Questions | |
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| | * Re-using code (lee howard) | |
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| | * Multicast | |
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| | * A lot of redundant code / different tables / repeating | |
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| | - Next steps: | |
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| | * Supporting MLD | |
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| 2019-02-22 | Have rough definition of tasks | |
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| 2019-02-22 | Have rough definition of tasks | |
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@ -63,7 +77,7 @@
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*** DONE Get feature list of tayga
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*** DONE Get feature list of tayga
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*** DONE Setup P4 base / structure
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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 Create minimal controller for populating tables
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*** TODO Checkout / review egress settings
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*** DONE Checkout / review egress settings
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*** TODO Implement ICMP <-> ICMP6 translation
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*** TODO Implement ICMP <-> ICMP6 translation
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**** DONE Parse icmp
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**** DONE Parse icmp
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**** DONE Parse icmpv6
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**** DONE Parse icmpv6
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@ -71,6 +85,9 @@
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**** DONE Calculate ICMP6 checksums
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**** DONE Calculate ICMP6 checksums
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**** TODO Implement minimal neighbor discovery
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**** TODO Implement minimal neighbor discovery
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***** TODO For the switch
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***** TODO For the switch
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****** DONE Register IPv6 address in table
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****** TODO Parse ICMPv6 up to neighbor solicitation
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****** TODO Use NDP (Neighbor Solicitation (NDP) , Neighbor Advertisement (NDP))
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***** TODO For other nodes -> multicast
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***** TODO For other nodes -> multicast
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***** TODO Maybe implement link local addresses (missing at the moment)
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***** TODO Maybe implement link local addresses (missing at the moment)
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****** ff02::/??
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****** ff02::/??
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@ -231,6 +248,106 @@ root@ubuntu:~/master-thesis/p4app# ls -1 /proc/sys/net/ipv6/conf/*/disable_ipv6
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/proc/sys/net/ipv6/conf/lo/disable_ipv6
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/proc/sys/net/ipv6/conf/lo/disable_ipv6
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root@ubuntu:~/master-thesis/p4app#
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root@ubuntu:~/master-thesis/p4app#
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Works on mininet
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mininet> h2 bash
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root@line:~# ip a
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
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link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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inet 127.0.0.1/8 scope host lo
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valid_lft forever preferred_lft forever
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inet6 ::1/128 scope host
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valid_lft forever preferred_lft forever
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2: h2-eth0@if93: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
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link/ether 32:0e:1e:bf:3c:4b brd ff:ff:ff:ff:ff:ff link-netnsid 0
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inet 10.0.0.2/8 brd 10.255.255.255 scope global h2-eth0
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valid_lft forever preferred_lft forever
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inet6 fe80::300e:1eff:febf:3c4b/64 scope link
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valid_lft forever preferred_lft forever
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root@line:~# ip addr add 2001:db8:61::42/64 dev h2-eth0
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root@line:~# ^Dexit
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mininet> h1 bash
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root@line:~# ip addr add 2001:db8:61::42/64^[[D^[[D^?^?^?^?^?^?^?^?^?^?^?^C^C
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root@line:~# ^Dexit
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mininet> h1 ip addr add 2001:db8:61::2/64 dev h1-eth0
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mininet> h2 ping6 -c2 2001:db8:61::2
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PING 2001:db8:61::2(2001:db8:61::2) 56 data bytes
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64 bytes from 2001:db8:61::2: icmp_seq=1 ttl=64 time=0.230 ms
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64 bytes from 2001:db8:61::2: icmp_seq=2 ttl=64 time=0.138 ms
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--- 2001:db8:61::2 ping statistics ---
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2 packets transmitted, 2 received, 0% packet loss, time 1018ms
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rtt min/avg/max/mdev = 0.138/0.184/0.230/0.046 ms
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mininet>
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mininet on VM also works
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mininet> h1 ip addr add 2001:db8:61::1/64 dev h1-eth0
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mininet> h2 ip addr add 2001:db8:61::2/64 dev h2-eth0
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mininet> h2 ping6 -c2 2001:db8:61::2
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PING 2001:db8:61::2(2001:db8:61::2) 56 data bytes
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64 bytes from 2001:db8:61::2: icmp_seq=1 ttl=64 time=0.053 ms
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64 bytes from 2001:db8:61::2: icmp_seq=2 ttl=64 time=0.082 ms
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--- 2001:db8:61::2 ping statistics ---
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2 packets transmitted, 2 received, 0% packet loss, time 999ms
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rtt min/avg/max/mdev = 0.053/0.067/0.082/0.016 ms
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mininet>
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WORKING trace on mininet on the VM
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19:38:49.852088 IP6 2001:db8:61::2 > ff02::1:ff00:1: ICMP6, neighbor solicitation, who has 2001:db8:61::1, length 32
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19:38:49.852144 IP6 2001:db8:61::1 > 2001:db8:61::2: ICMP6, neighbor advertisement, tgt is 2001:db8:61::1, length 32
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19:38:49.852163 IP6 2001:db8:61::2 > 2001:db8:61::1: ICMP6, echo request, seq 1, length 64
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19:38:49.852176 IP6 2001:db8:61::1 > 2001:db8:61::2: ICMP6, echo reply, seq 1, length 64
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checking ipv6 in p4-utils
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p4@ubuntu:~/p4-utils$ grep -ri ipv6 .
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./p4utils/mininetlib/p4_mininet.py: # disable IPv6
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./p4utils/mininetlib/p4_mininet.py: self.cmd("sysctl -w net.ipv6.conf.all.disable_ipv6=1")
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./p4utils/mininetlib/p4_mininet.py: self.cmd("sysctl -w net.ipv6.conf.default.disable_ipv6=1")
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./p4utils/mininetlib/p4_mininet.py: self.cmd("sysctl -w net.ipv6.conf.lo.disable_ipv6=1")
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./p4utils/mininetlib/p4net.py: #remove Ipv6 for all the interfaces
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./p4utils/mininetlib/p4net.py: cmd2 = "sysctl net.ipv6.conf.{0}.disable_ipv6=1"
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./p4utils/mininetlib/p4net.py: #remove ipv6
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Binary file ./p4utils/mininetlib/p4_mininet.pyc matches
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Binary file ./p4utils/mininetlib/p4net.pyc matches
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Binary file ./p4utils/utils/runtime_API.pyc matches
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./p4utils/utils/runtime_API.py:class UIn_BadIPv6Error(UIn_Error):
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./p4utils/utils/runtime_API.py:def ipv6Addr_to_bytes(addr):
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./p4utils/utils/runtime_API.py: from ipaddr import IPv6Address
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./p4utils/utils/runtime_API.py: ip = IPv6Address(addr)
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./p4utils/utils/runtime_API.py: raise UIn_BadIPv6Error()
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./p4utils/utils/runtime_API.py: raise UIn_BadIPv6Error()
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./p4utils/utils/runtime_API.py: return ipv6Addr_to_bytes(input_str)
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./p4utils/utils/runtime_API.py: except UIn_BadIPv6Error:
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./p4utils/utils/runtime_API.py: raise UIn_BadParamError("Invalid IPv6 address")
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p4@ubuntu:~/p4-utils$
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Messages we see in the controller on startup
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:16 src=00:00:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=56 nh=Hop-by-Hop Option Header hlim=1 src=:: dst=ff02::16 |<IPv6ExtHdrHopByHop nh=ICMPv6 len=0 autopad=On options=[<RouterAlert otype=Router Alert [00: skip, 0: Don't change en-route] optlen=2 value=Datagram contains a MLD message |>, <PadN otype=PadN [00: skip, 0: Don't change en-route] optlen=0 |>] |<ICMPv6MLReport2 type=MLD Report Version 2 res=0 cksum=0x6d6d reserved=0 records_number=2 records=[<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:1 sources=[ ] auxdata='' |<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:2 |>>] |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:16 src=00:01:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=36 nh=Hop-by-Hop Option Header hlim=1 src=fe80::201:aff:fe00:2 dst=ff02::16 |<IPv6ExtHdrHopByHop nh=ICMPv6 len=0 autopad=On options=[<RouterAlert otype=Router Alert [00: skip, 0: Don't change en-route] optlen=2 value=Datagram contains a MLD message |>, <PadN otype=PadN [00: skip, 0: Don't change en-route] optlen=0 |>] |<ICMPv6MLReport2 type=MLD Report Version 2 res=0 cksum=0x6604 reserved=0 records_number=1 records=[<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:2 |>] |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:16 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=36 nh=Hop-by-Hop Option Header hlim=1 src=fe80::200:aff:fe00:1 dst=ff02::16 |<IPv6ExtHdrHopByHop nh=ICMPv6 len=0 autopad=On options=[<RouterAlert otype=Router Alert [00: skip, 0: Don't change en-route] optlen=2 value=Datagram contains a MLD message |>, <PadN otype=PadN [00: skip, 0: Don't change en-route] optlen=0 |>] |<ICMPv6MLReport2 type=MLD Report Version 2 res=0 cksum=0x6607 reserved=0 records_number=1 records=[<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:1 |>] |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=16 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::2 |<ICMPv6ND_RS type=Router Solicitation code=0 cksum=0xf72e res=0 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:16 src=00:00:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=56 nh=Hop-by-Hop Option Header hlim=1 src=:: dst=ff02::16 |<IPv6ExtHdrHopByHop nh=ICMPv6 len=0 autopad=On options=[<RouterAlert otype=Router Alert [00: skip, 0: Don't change en-route] optlen=2 value=Datagram contains a MLD message |>, <PadN otype=PadN [00: skip, 0: Don't change en-route] optlen=0 |>] |<ICMPv6MLReport2 type=MLD Report Version 2 res=0 cksum=0x6d6d reserved=0 records_number=2 records=[<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:1 sources=[ ] auxdata='' |<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:2 |>>] |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:16 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=36 nh=Hop-by-Hop Option Header hlim=1 src=fe80::200:aff:fe00:1 dst=ff02::16 |<IPv6ExtHdrHopByHop nh=ICMPv6 len=0 autopad=On options=[<RouterAlert otype=Router Alert [00: skip, 0: Don't change en-route] optlen=2 value=Datagram contains a MLD message |>, <PadN otype=PadN [00: skip, 0: Don't change en-route] optlen=0 |>] |<ICMPv6MLReport2 type=MLD Report Version 2 res=0 cksum=0x6607 reserved=0 records_number=1 records=[<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:1 |>] |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:16 src=00:00:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=56 nh=Hop-by-Hop Option Header hlim=1 src=fe80::200:aff:fe00:2 dst=ff02::16 |<IPv6ExtHdrHopByHop nh=ICMPv6 len=0 autopad=On options=[<RouterAlert otype=Router Alert [00: skip, 0: Don't change en-route] optlen=2 value=Datagram contains a MLD message |>, <PadN otype=PadN [00: skip, 0: Don't change en-route] optlen=0 |>] |<ICMPv6MLReport2 type=MLD Report Version 2 res=0 cksum=0x63ea reserved=0 records_number=2 records=[<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:1 sources=[ ] auxdata='' |<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:2 |>>] |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=16 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:2 dst=ff02::2 |<ICMPv6ND_RS type=Router Solicitation code=0 cksum=0xf72d res=0 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:02 |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:16 src=00:00:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=56 nh=Hop-by-Hop Option Header hlim=1 src=fe80::200:aff:fe00:2 dst=ff02::16 |<IPv6ExtHdrHopByHop nh=ICMPv6 len=0 autopad=On options=[<RouterAlert otype=Router Alert [00: skip, 0: Don't change en-route] optlen=2 value=Datagram contains a MLD message |>, <PadN otype=PadN [00: skip, 0: Don't change en-route] optlen=0 |>] |<ICMPv6MLReport2 type=MLD Report Version 2 res=0 cksum=0x63ea reserved=0 records_number=2 records=[<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:1 sources=[ ] auxdata='' |<ICMPv6MLDMultAddrRec rtype=4 auxdata_len=0 sources_number=0 dst=ff02::1:ff00:2 |>>] |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=16 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::2 |<ICMPv6ND_RS type=Router Solicitation code=0 cksum=0xf72e res=0 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=16 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:2 dst=ff02::2 |<ICMPv6ND_RS type=Router Solicitation code=0 cksum=0xf72d res=0 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:02 |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=16 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::2 |<ICMPv6ND_RS type=Router Solicitation code=0 cksum=0xf72e res=0 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:02 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=16 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:2 dst=ff02::2 |<ICMPv6ND_RS type=Router Solicitation code=0 cksum=0xf72d res=0 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:02 |>>>>
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***** Ignored ICMPv6 packets
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We are not using router advertisements, so we ignore RS packets
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DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:01 type=0x86dd |<IPv6 version=6 tc=0 fl=0 plen=16 nh=ICMPv6 hlim=255 src=fe80::200:aff:fe00:1 dst=ff02::2 |<ICMPv6ND_RS type=Router Solicitation code=0 cksum=0xf72e res=0 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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**** Static mappings
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**** Static mappings
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- likely need table(s)
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- likely need table(s)
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@ -276,6 +393,10 @@ listening on h1-eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
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4 packets received by filter
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4 packets received by filter
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0 packets dropped by kernel
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0 packets dropped by kernel
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root@ubuntu:~/master-thesis#
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root@ubuntu:~/master-thesis#
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***** When pinging we see
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***** When pinging we see
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DEBUG:main:INCOMING: <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:db8:61::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd343 res=0 tgt=2001:db8:61::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
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DEBUG:main:INCOMING: <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:db8:61::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd343 res=0 tgt=2001:db8:61::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||||
DEBUG:main:INCOMING: <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:db8:61::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd343 res=0 tgt=2001:db8:61::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
DEBUG:main:INCOMING: <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:db8:61::1 dst=ff02::1:ff00:42 |<ICMPv6ND_NS type=Neighbor Solicitation code=0 cksum=0xd343 res=0 tgt=2001:db8:61::42 |<ICMPv6NDOptSrcLLAddr type=1 len=1 lladdr=00:00:0a:00:00:01 |>>>>
|
||||||
|
|
@ -292,12 +413,13 @@ DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x
|
||||||
**** Not included
|
**** Not included
|
||||||
- DNS64 - has already been solved in a different domain
|
- DNS64 - has already been solved in a different domain
|
||||||
*** References / Follow up
|
*** 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
|
||||||
|
**** RFC 4443 ICMPv6 https://tools.ietf.org/html/rfc4443
|
||||||
|
**** RFC 4861: https://tools.ietf.org/html/rfc4861 Neighbor discovery
|
||||||
**** RFC 6052: https://tools.ietf.org/html/rfc6052 IPv6 Addressing of IPv4/IPv6 Translators
|
**** RFC 6052: https://tools.ietf.org/html/rfc6052 IPv6 Addressing of IPv4/IPv6 Translators
|
||||||
**** RFC 6586 for deployment experiences using Stateful NAT64.
|
**** RFC 6586 for deployment experiences using Stateful NAT64.
|
||||||
**** RFC 7757 Explicit Address Mappings for Stateless IP/ICMP Translation
|
**** RFC 7757 Explicit Address Mappings for Stateless IP/ICMP Translation
|
||||||
**** RFC 4443 ICMPv6 https://tools.ietf.org/html/rfc4443
|
|
||||||
**** RFC 4861: https://tools.ietf.org/html/rfc4861 Neighbor discovery
|
|
||||||
**** RFC 2460 IPv6 (Checksum https://tools.ietf.org/html/rfc2460#section-8.1)
|
|
||||||
**** EAMT/Jool: https://www.jool.mx/en/eamt.html
|
**** EAMT/Jool: https://www.jool.mx/en/eamt.html
|
||||||
**** Solicited node multicast address https://en.wikipedia.org/wiki/Solicited-node_multicast_address
|
**** Solicited node multicast address https://en.wikipedia.org/wiki/Solicited-node_multicast_address
|
||||||
* Proposal / task description
|
* Proposal / task description
|
||||||
|
|
@ -366,3 +488,24 @@ to challenge this notion with three different methods:
|
||||||
As the IPv4 header does not allow embedding IPv6 addresses due to size
|
As the IPv4 header does not allow embedding IPv6 addresses due to size
|
||||||
limitations, embedding the destination address in a secondary header
|
limitations, embedding the destination address in a secondary header
|
||||||
might be necessary (possibly encapsulated in UDP).
|
might be necessary (possibly encapsulated in UDP).
|
||||||
|
* Detail LOG
|
||||||
|
** 2019-02-28
|
||||||
|
*** pinging in router mode: nothing shown in the controller, multicast forwarded -> "ok"
|
||||||
|
|
||||||
|
root@ubuntu:~/master-thesis/p4app# ping6 -c1 2001:db8:61::42
|
||||||
|
PING 2001:db8:61::42(2001:db8:61::42) 56 data bytes
|
||||||
|
From 2001:db8:61::1 icmp_seq=1 Destination unreachable: Address unreachable
|
||||||
|
|
||||||
|
--- 2001:db8:61::42 ping statistics ---
|
||||||
|
1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms
|
||||||
|
|
||||||
|
root@ubuntu:~/master-thesis/p4app#
|
||||||
|
|
||||||
|
|
||||||
|
sudo: unable to resolve host ubuntu
|
||||||
|
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
|
||||||
|
listening on h1-eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
|
||||||
|
09:47:07.191569 IP6 2001:db8:61::1 > ff02::1:ff00:42: ICMP6, neighbor solicitation, who has 2001:db8:61::42, length 32
|
||||||
|
09:47:08.190331 IP6 2001:db8:61::1 > ff02::1:ff00:42: ICMP6, neighbor solicitation, who has 2001:db8:61::42, length 32
|
||||||
|
09:47:09.190279 IP6 2001:db8:61::1 > ff02::1:ff00:42: ICMP6, neighbor solicitation, who has 2001:db8:61::42, length 32
|
||||||
|
*** TODO special rule for ff02::1:ff00:42
|
||||||
|
|
|
||||||
|
|
@ -110,6 +110,9 @@ class L2Controller(object):
|
||||||
self.controller.table_add("ndp", "multicast_pkg", [ndp_prefix, str(port)], [str(port)])
|
self.controller.table_add("ndp", "multicast_pkg", [ndp_prefix, str(port)], [str(port)])
|
||||||
|
|
||||||
|
|
||||||
|
# Special rule for switch entries
|
||||||
|
self.controller.table_add("ndp_answer", "icmp6_neighbor_solicitation", ["ff02::1:ff00:42", "135"], ["2001:db8:61::42"])
|
||||||
|
|
||||||
def init_boilerplate(self, sw_name):
|
def init_boilerplate(self, sw_name):
|
||||||
self.topo = Topology(db="topology.db")
|
self.topo = Topology(db="topology.db")
|
||||||
self.sw_name = sw_name
|
self.sw_name = sw_name
|
||||||
|
|
|
||||||
|
|
@ -26,12 +26,13 @@ control MyComputeChecksum(inout headers hdr, inout metadata meta) {
|
||||||
{
|
{
|
||||||
hdr.ipv6.src_addr, /* 128 */
|
hdr.ipv6.src_addr, /* 128 */
|
||||||
hdr.ipv6.dst_addr, /* 128 */
|
hdr.ipv6.dst_addr, /* 128 */
|
||||||
hdr.ipv6.payload_length, /* 16 -> should be 32 according to RFC2460 - also static number? */
|
hdr.ipv6.payload_length, /* 16 bit -> should be 32 according to RFC2460 - also static number? */
|
||||||
24w0, /* 24 0's */
|
24w0, /* 24 0's */
|
||||||
PROTO_ICMP6 /* 8 */
|
PROTO_ICMP6 /* 8 */
|
||||||
},
|
},
|
||||||
hdr.icmp6.checksum,
|
hdr.icmp6.checksum,
|
||||||
HashAlgorithm.csum16);
|
HashAlgorithm.csum16
|
||||||
|
);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -24,6 +24,9 @@ const bit<8> TCP_SEQ_LEN = 4;
|
||||||
|
|
||||||
const bit<8> ICMP6_ECHO_REQUEST = 128;
|
const bit<8> ICMP6_ECHO_REQUEST = 128;
|
||||||
const bit<8> ICMP6_ECHO_REPLY = 129;
|
const bit<8> ICMP6_ECHO_REPLY = 129;
|
||||||
|
const bit<8> ICMP6_NS = 135;
|
||||||
|
const bit<8> ICMP6_NA = 136;
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
header ethernet_t {
|
header ethernet_t {
|
||||||
|
|
|
||||||
|
|
@ -16,18 +16,81 @@ control MyIngress(inout headers hdr,
|
||||||
inout metadata meta,
|
inout metadata meta,
|
||||||
inout standard_metadata_t standard_metadata) {
|
inout standard_metadata_t standard_metadata) {
|
||||||
|
|
||||||
/* use for debugging and controlling flows */
|
/********************** ACTIONS ***********************************/
|
||||||
|
|
||||||
|
/* As the name says */
|
||||||
|
action drop() {
|
||||||
|
mark_to_drop();
|
||||||
|
}
|
||||||
|
|
||||||
|
/* As the name says */
|
||||||
action send_to_controller() {
|
action send_to_controller() {
|
||||||
clone3(CloneType.I2E, 100, meta);
|
clone3(CloneType.I2E, 100, meta);
|
||||||
}
|
}
|
||||||
|
|
||||||
/********************** NDP support ***********************************/
|
/* Output PKG on correct ports (plural) */
|
||||||
|
|
||||||
/* map port to group */
|
|
||||||
action multicast_pkg(mcast_t mcast_grp) {
|
action multicast_pkg(mcast_t mcast_grp) {
|
||||||
standard_metadata.mcast_grp = mcast_grp;
|
standard_metadata.mcast_grp = mcast_grp;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
action icmp6_neighbor_solicitation(ipv6_addr_t addr) {
|
||||||
|
/* egress = ingress */
|
||||||
|
standard_metadata.egress_spec = standard_metadata.ingress_port;
|
||||||
|
|
||||||
|
hdr.ipv6.dst_addr = hdr.ipv6.src_addr;
|
||||||
|
hdr.ipv6.src_addr = addr;
|
||||||
|
hdr.icmp6.type = ICMP6_NA;
|
||||||
|
}
|
||||||
|
|
||||||
|
/********************** Reply to NDP for US ***********************************/
|
||||||
|
table ndp_answer {
|
||||||
|
key = {
|
||||||
|
hdr.ipv6.dst_addr: exact; /* our multicast embedded mac address */
|
||||||
|
hdr.icmp6.type: exact;
|
||||||
|
}
|
||||||
|
actions = {
|
||||||
|
send_to_controller;
|
||||||
|
reply_icmp6_neighbor_solicitation;
|
||||||
|
NoAction;
|
||||||
|
}
|
||||||
|
size = NDP_TABLE_SIZE;
|
||||||
|
default_action = NoAction;
|
||||||
|
}
|
||||||
|
|
||||||
|
/********************** debugging / general support ***********************************/
|
||||||
|
|
||||||
|
table port2mcast {
|
||||||
|
key = {
|
||||||
|
standard_metadata.ingress_port : exact;
|
||||||
|
}
|
||||||
|
actions = {
|
||||||
|
multicast_pkg;
|
||||||
|
send_to_controller;
|
||||||
|
NoAction;
|
||||||
|
}
|
||||||
|
size = NDP_TABLE_SIZE;
|
||||||
|
default_action = NoAction;
|
||||||
|
// default_action = send_to_controller;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Handle multicast registration of NDP */
|
||||||
|
table addr2mcast {
|
||||||
|
key = {
|
||||||
|
hdr.ipv6.dst_addr: exact;
|
||||||
|
}
|
||||||
|
actions = {
|
||||||
|
multicast_pkg;
|
||||||
|
send_to_controller;
|
||||||
|
NoAction;
|
||||||
|
}
|
||||||
|
size = NDP_TABLE_SIZE;
|
||||||
|
default_action = NoAction;
|
||||||
|
// default_action = send_to_controller;
|
||||||
|
}
|
||||||
|
|
||||||
|
/********************** NDP support ***********************************/
|
||||||
|
|
||||||
|
|
||||||
table ndp {
|
table ndp {
|
||||||
key = {
|
key = {
|
||||||
hdr.ipv6.dst_addr: lpm;
|
hdr.ipv6.dst_addr: lpm;
|
||||||
|
|
@ -106,9 +169,13 @@ control MyIngress(inout headers hdr,
|
||||||
default_action = NoAction;
|
default_action = NoAction;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/********************** APPLYING TABLES ***********************************/
|
||||||
apply {
|
apply {
|
||||||
if(hdr.ipv6.isValid()) {
|
if(hdr.ipv6.isValid()) {
|
||||||
|
|
||||||
|
/* FIXME: structure / use .hit to do logic */
|
||||||
|
ndp_answer.apply();
|
||||||
|
|
||||||
ndp.apply(); /* flood or if it is us - answer */
|
ndp.apply(); /* flood or if it is us - answer */
|
||||||
v6_addresses.apply();
|
v6_addresses.apply();
|
||||||
v6_routing.apply();
|
v6_routing.apply();
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue