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use SO_RCVBUFFORCE to force receive buffer increase on Linux (#3804)

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* Add ability to force change the receive buffer size using SO_RCVBUFFORCE in Linux

* Fix imports

* Update test

* Add sys_conn_helper_not_linux

* Rename file

* ignore the error on SetReadBuffer

* also run unit tests as root

---------

Co-authored-by: Marten Seemann <martenseemann@gmail.com>
This commit is contained in:
Marco Munizaga 2023-05-08 02:40:47 -07:00 • committed by GitHub
parent da198b710b
commit 843b633434
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5 changed files with 90 additions and 5 deletions
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13
transport.go
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@ -180,10 +180,17 @@ func setReceiveBuffer(c net.PacketConn, logger utils.Logger) error {
logger.Debugf("Conn has receive buffer of %d kiB (wanted: at least %d kiB)", size/1024, protocol.DesiredReceiveBufferSize/1024)
return nil
}
if err := conn.SetReadBuffer(protocol.DesiredReceiveBufferSize); err != nil {
return fmt.Errorf("failed to increase receive buffer size: %w", err)
}
// Ignore the error. We check if we succeeded by querying the buffer size afterward.
_ = conn.SetReadBuffer(protocol.DesiredReceiveBufferSize)
newSize, err := inspectReadBuffer(c)
if newSize < protocol.DesiredReceiveBufferSize {
// Try again with RCVBUFFORCE on Linux
_ = forceSetReceiveBuffer(c, protocol.DesiredReceiveBufferSize)
newSize, err = inspectReadBuffer(c)
if err != nil {
return fmt.Errorf("failed to determine receive buffer size: %w", err)
}
}
if err != nil {
return fmt.Errorf("failed to determine receive buffer size: %w", err)
}