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#i2p-dev
/2021/12/16
@eyedeekay
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dr|z3d ok, giving up on railroad for now. too much time wasted.
dr|z3d ok, seeing repeated invalid messages coming from the same router. router bug or hostile attack, no idea.
dr|z3d I've given up on getting railroad running for now, eyedeekay. it refuses to start. CRIT […lroad-linux] …oadClientAppsJob: Error starting up the client class net.i2p.app.CorrectedShellService
dr|z3d > any idea about router sending corrupt messages repeatedly, zzz? I'm erring on the side of caution and blocklisting for now.
zzz would need more info to offer advice
dr|z3d ok, let me see if I've still got logs
dr|z3d repeated ....MessageReceiver: Message invalid: log entries with an attached DUMP.. you want to look at a few of those?
dr|z3d (only from one router)
zzz what protocol layer is the corruption at?
dr|z3d looks like UDP / I2NP
dr|z3d > net.i2p.data.i2np.I2NPMessageException: I2NP length in TGM: 1782 but remaining bytes: 580
dr|z3d > net.i2p.data.i2np.I2NPMessageException: I2NP length in TGM: 1894 but remaining bytes: 692
dr|z3d re ip restriction, do I need to swapout all the refs to 'length == 2' to 'length == 1' to bring the limit down to 1 router per range?
zzz re: TGM error, never seen that before, no ideas
dr|z3d I can provide some logs if you want to take a look. got about 5 redacted entries here.
zzz not for now
zzz re: ip restriction, the code always restricts to one router per range
zzz the setting is whether the range is /8 or /16 or /24
dr|z3d ok, so what have you tweaked? you're now limiting to /8 ?
dr|z3d do I just change MaskedIPSet ipSet = ipRestriction > 0 ? new MaskedIPSet(16) : null; to (8) to limit to /8 ?
zzz diff --git a/router/java/src/net/i2p/router/TunnelPoolSettings.java b/router/java/src/net/i2p/router/TunnelPoolSettings.java
zzz index c33e791af..03bdc74a0 100644
zzz --- a/router/java/src/net/i2p/router/TunnelPoolSettings.java
zzz +++ b/router/java/src/net/i2p/router/TunnelPoolSettings.java
zzz @@ -81,7 +81,8 @@ public class TunnelPoolSettings {
zzz //private static final int DEFAULT_OB_EXPL_LENGTH_VARIANCE = isSlow ? 0 : 1;
zzz public static final boolean DEFAULT_ALLOW_ZERO_HOP = false;
zzz - public static final int DEFAULT_IP_RESTRICTION = 2; // class B (/16)
zzz +/////////////// TEST
zzz + public static final int DEFAULT_IP_RESTRICTION = 1; // class B (/16)
zzz private static final int MIN_PRIORITY = -25;
zzz private static final int MAX_PRIORITY = 25;
zzz private static final int EXPLORATORY_PRIORITY = 30;
dr|z3d ah, right, missed that, thanks.
dr|z3d so the // comment should be class A (/8) there, if you decide that's what you want to ship as default.