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++notes; try to cast & save payload_length in ingress

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Nico Schottelius 2019-03-06 17:37:30 +01:00
parent e0a9d28606
commit ee62eb32c3
2 changed files with 28 additions and 2 deletions
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28
doc/plan.org
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@ -203,6 +203,8 @@ multicast address of the target address."
**** DONE Make switch answer icmp6 echo request for
**** TODO Make switch answer icmp echo request for
**** TODO Introduce mixed mode: switch: icmp6 echo reply, controller: NDP
***** TODO try 1: reply seen, but checksum is incorrect
**** DONE Add default route for v6 hosts
p4@ubuntu:~/master-thesis$ mx h1 ip -6 r
sudo: unable to resolve host ubuntu
@ -290,6 +292,7 @@ user@T:~# iptables -t mangle -A PREROUTING \
- IPv6 in IPv4 mapped hosts are in 10.0.6.0/24
- IPv4 default router = 10.0.0.42
**** Neighbor discover protocol
***** Initial log
- Matching on prefix & ingress port, setting multicast
Being forwarded:
@ -463,6 +466,30 @@ DEBUG:main:INCOMING: <Ether dst=33:33:00:00:00:02 src=00:00:0a:00:00:02 type=0x
We are not using router advertisements, so we ignore RS packets
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 |>>>>
***** Double table entries due to collision
- NDP: last 24 bit
- Switch has same ending address in different networks -> equal
last 24 bit
- results in trying to add multicast address multiple times
Adding entry to exact match table v6_addresses
match key: EXACT-ff:02:00:00:00:00:00:00:00:00:00:01:ff:00:00:42
action: controller_reply
runtime data: 00:01
Invalid table operation (DUPLICATE_ENTRY)
Adding entry to exact match table v6_addresses
match key: EXACT-ff:02:00:00:00:00:00:00:00:00:00:01:ff:00:00:43
action: controller_reply
runtime data: 00:01
Invalid table operation (DUPLICATE_ENTRY)
Adding entry to exact match table v6_addresses
match key: EXACT-20:01:0d:b8:00:00:00:01:00:00:00:00:00:00:00:43
action: icmp6_echo_reply
runtime data:
Entry has been added with handle 5
**** Static mappings
- likely need table(s)
- need tcp & udp translation
@ -517,7 +544,6 @@ DEBUG:main:INCOMING: <Ether dst=33:33:ff:00:00:42 src=00:00:0a:00:00:01 type=0x
****** Right side: IPv4
***** Included in the header
**** Requirements
*** Performance comparison
*** Feature/Functionality difference / overview / Challenges in P4

2
p4src/static-mapping.p4
View file

@ -63,7 +63,7 @@ control MyIngress(inout headers hdr,
hdr.icmp6.type = ICMP6_ECHO_REPLY;
meta.do_cksum = 1;
//meta.cast_length = (bit<32>) hdr.ipv6.payload_length;
meta.cast_length = (bit<32>) hdr.ipv6.payload_length;
}
/* this needs SESSIONS!!