wgengine/router: fix MTU configuration on Windows #5915
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Always set the MTU to the Tailscale default MTU. In practice we are missing applying an MTU for IPv6 on Windows prior to this patch. This is the simplest patch to fix the problem, the code in here needs some more refactoring. Fixes #5914 Signed-off-by: James Tucker <james@tailscale.com>
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danderson
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Oct 12, 2022
dblohm7
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Does it break the behave of TS_DEBUG_MTU on Windows? |
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This change didn't introduce a regression on that axis, but it also did not fix that issue. Prior to this change MTU was never set for IPv6, with this change it is, but it does not respect TS_DEBUG_MTU, as several code paths do not. Are you using TS_DEBUG_MTU regularly? |
raggi
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Noted on #5915 TS_DEBUG_MTU was not used consistently everywhere. Extract the default into a function that can apply this centrally and use it everywhere. Added envknob.Lookup{Int,Uint}Sized to make it easier to keep CodeQL happy when using converted values. Updates #5915 Signed-off-by: James Tucker <james@tailscale.com>
raggi
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Noted on #5915 TS_DEBUG_MTU was not used consistently everywhere. Extract the default into a function that can apply this centrally and use it everywhere. Added envknob.Lookup{Int,Uint}Sized to make it easier to keep CodeQL happy when using converted values. Updates #5915 Signed-off-by: James Tucker <james@tailscale.com>
raggi
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Mar 30, 2023
Noted on #5915 TS_DEBUG_MTU was not used consistently everywhere. Extract the default into a function that can apply this centrally and use it everywhere. Added envknob.Lookup{Int,Uint}Sized to make it easier to keep CodeQL happy when using converted values. Updates #5915 Signed-off-by: James Tucker <james@tailscale.com>
darksip
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Noted on tailscale#5915 TS_DEBUG_MTU was not used consistently everywhere. Extract the default into a function that can apply this centrally and use it everywhere. Added envknob.Lookup{Int,Uint}Sized to make it easier to keep CodeQL happy when using converted values. Updates tailscale#5915 Signed-off-by: James Tucker <james@tailscale.com>
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Always set the MTU to the Tailscale default MTU. In practice we are
missing applying an MTU for IPv6 on Windows prior to this patch.
This is the simplest patch to fix the problem, the code in here needs
some more refactoring.
Fixes #5914
Signed-off-by: James Tucker james@tailscale.com