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send the CONNECTION_REFUSED error when refusing a connection #4250

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merged 1 commit into from Jan 19, 2024

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@marten-seemann marten-seemann commented Jan 19, 2024

So far, we used Connection.destroy, which destroys a connection without sending out a CONNECTION_CLOSE frame. This is useful (for example) when receiving a stateless reset, but it's not what we want when the server refuses an incoming connection. In this case, we want to send out a packet with a CONNECTION_CLOSE frame to inform the client that the connection attempt is being rejected.

This PR also adds an integration test. Once again this confirms the rule: If there's no test, it will break, rather sooner than later.

@marten-seemann marten-seemann added this to the v0.42 milestone Jan 19, 2024
So far, we used Connection.destroy, which destroys a connection without
sending out a CONNECTION_CLOSE frame. This is useful (for example) when
receiving a stateless reset, but it's not what we want when the server
refuses an incoming connection. In this case, we want to send out a
packet with a CONNECTION_CLOSE frame to inform the client that the
connection attempt is being rejected.
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codecov bot commented Jan 19, 2024

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (b3eb375) 84.11% compared to head (2531ac6) 84.10%.

Files Patch % Lines
closed_conn.go 28.57% 5 Missing ⚠️
connection.go 0.00% 3 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##           master    #4250      +/-   ##
==========================================
- Coverage   84.11%   84.10%   -0.01%     
==========================================
  Files         150      150              
  Lines       15398    15403       +5     
==========================================
+ Hits        12951    12954       +3     
- Misses       1946     1948       +2     
  Partials      501      501              

☔ View full report in Codecov by Sentry.
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@marten-seemann marten-seemann linked an issue Jan 19, 2024 that may be closed by this pull request
@marten-seemann marten-seemann changed the title send out the CONNECTION_REFUSED error when refusing a connection send the CONNECTION_REFUSED error when refusing a connection Jan 19, 2024
@marten-seemann marten-seemann merged commit cb1775a into master Jan 19, 2024
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@marten-seemann marten-seemann deleted the actually-send-connection-refused branch January 19, 2024 06:30
nanokatze pushed a commit to nanokatze/quic-go that referenced this pull request Feb 1, 2024
…c-go#4250)

So far, we used Connection.destroy, which destroys a connection without
sending out a CONNECTION_CLOSE frame. This is useful (for example) when
receiving a stateless reset, but it's not what we want when the server
refuses an incoming connection. In this case, we want to send out a
packet with a CONNECTION_CLOSE frame to inform the client that the
connection attempt is being rejected.
mgjeong pushed a commit to mgjeong/quic-go that referenced this pull request Feb 13, 2024
…c-go#4250)

So far, we used Connection.destroy, which destroys a connection without
sending out a CONNECTION_CLOSE frame. This is useful (for example) when
receiving a stateless reset, but it's not what we want when the server
refuses an incoming connection. In this case, we want to send out a
packet with a CONNECTION_CLOSE frame to inform the client that the
connection attempt is being rejected.
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CONNECTION_REFUSED errors are not sent out from the server
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