#ls2 (irc2p) | #ls2 I2P Protocol Development Discussion - Next Meeting Monday, October 9th 6:30 UTC

R4SAS lol

orignal what?

orignal now I understand my logic

orignal ipv6 always required mtu

orignal that's why I have to detect it

orignal while ipv4 always had a default value

R4SAS about MTU for v4. like I said, we must check it too because here can be situations where VPN used

R4SAS not always

R4SAS VPN will make you use 1280

orignal but now I know why I didn't do it before

R4SAS and why "always"?

R4SAS it is not required if you have native IPv6

R4SAS because ISP will provide address same wasy as IPv4 when you dialing PPPoE with MTU 1480 or 1500 if IPoE is used

orignal <zzz> ipv4 is mod 16 = 12, with a default 1484

orignal that's why I didn't publish

orignal zzz, what temination reason fo you send if I2NP messaged were not acked?

zzz 14

zzz any results of investigation into ImQC and k8vh?

orignal they are not ours

zzz do you know who? they updated - ImQC is now 1480, k8vh is now 1420... why?

orignal I have changed the code to use mtu=1480 for HE

orignal because my code change

orignal github.com/PurpleI2P/i2pd/commit/014e4b0e1d36f90569704ca462bed4e240964527

zzz the question from yesterday was, is it a MTU detection bug or a PMTU issue?

orignal we detect MTU propely on windowns

orignal that's what we can say

zzz ok I see you just hardcoded it like I was doing for HE

zzz is range48 always 1420?

zzz *route48

orignal no, but they wireguard is

orignal better to set it lower than higher

zzz then why not set it lower for HE? they don't support wireguard?

orignal looks like every wreguard uses 1420

orignal no they don't

zzz ok

orignal only gre

orignal hence route48 has lower requirements to your network

orignal but you need modern kernel

orignal that supports it

orignal deavmi uses some german broker for wireguard and also 1420

orignal will ask him

zzz you're not doing ipv4 mtu right

zzz github.com/PurpleI2P/i2pd/commit/14a6947b021a74c7ec0bc7fedb0dace5253ecd42

zzz example: y7hn

zzz SSU: cost: 9 caps: BC host: 213.252.246.27 key: rf8kzcuTCDnMMFGLPhPPa2DQ2yt3nw2lQAwHke-diLQ= mtu: 1472 port: 30673

zzz must be mod 16 = 12. 1468

orignal look at 10 lines above

orignal it's for ipv6 only

orignal I haven't implemented ipv4 yet

orignal if (host.is_v6 ()

orignal where did this example come from idk

orignal shouldn't be

orignal I mean I shouldn't publish mtu for SSU1 as for now

orignal ipv4 SSU1

zzz y7hnzN4SInr7JdqskYw-rbhkwabFofeGctFGfte-o5Q= IPv4 SSU1

orignal maybe it's a fork?

zzz just reporting what I see

orignal because i2pd never had a code to publish ipv4 mtu

orignal do you see more?

zzz no

orignal maybe it's someone's fork

orignal I thought we are not supposed to publish mtu for ipv4 before yesterday

zzz is xZ9n 1500?

orignal yes

orignal but why?

zzz still seeing some failures with it

zzz not too many

orignal let me rebuild it

orignal I haven't updated it for few days

orignal MTU:1500

orignal 10 SSU2 sessions right now

orignal 2RRY size is 1514 and I;m connected to you thorugh ipv4

zzz ok, restarting now

orignal I meant you are able to handle it's SessionConfirmed

orignal I will rebuild xZ9n in 30 minutes

orignal a little busy now

zzz ok

orignal hmm deavi told me strange this

orignal his ipv6 tunnel has proefix 2a04:5b81

orignal with mtu 1420

orignal but it's not in the list

orignal updated xZ9N

zzz ImQC HE addr still failing, advertising 1480, I'm forcing to 1472

orignal why 1472?

orignal if it's SSU2

orignal how would it make a difference?

orignal if I understand 1472 is for 1480

zzz I'm just forcing all HE to 1472 max, whether SSU 1 or 2, just for simplicity

orignal that's what I did in SSU1

orignal do you want me to set max mtu to 1472?

orignal instead 1500

zzz for all SSU2? no

zzz just trying to figure out if we should limit session confirmed to 1280, and start data phase at 1280

zzz and then ramp up

orignal maybe

orignal how about others?

zzz at least 90% of my failures are with i2pd still

orignal it might not be just mtu but something else

zzz the i2pd IPv4 with a problem is sQ8dVd and ~GIB3b

zzz but maybe they don't have fragment fix

zzz if it is PMTU then I'd expect to see more java fails

orignal maybe Java users don't like HE

zzz maybe :)

orignal but you can check by IP

zzz last 4 hours:

zzz 5 sQ8dVd

zzz 5 ImQCa~

zzz 1 YXEAXl

zzz 1 ~GIB3b

zzz 1 CEFnjX

zzz 1 bAU~6X

orignal no mine in the list

orignal let me make 2RRY floodfiil

zzz I see lots of java HE

orignal and what mtu do they publish?

zzz mostly 1472, one is 1280

orignal I guess for SSU1

orignal I also made some fix about incorrect buffer size for incoming packets

orignal that's why I'm asking about 2RRY, xZ9N , MNcW and cdoF

orignal they all run lastet code