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71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build unix
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package magicsock
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import (
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"net"
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"syscall"
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"testing"
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"tailscale.com/types/nettype"
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)
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func TestTrySetSocketBuffer(t *testing.T) {
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c, err := net.ListenPacket("udp", ":0")
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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rc, err := c.(*net.UDPConn).SyscallConn()
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if err != nil {
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t.Fatal(err)
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}
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getBufs := func() (int, int) {
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var rcv, snd int
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rc.Control(func(fd uintptr) {
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rcv, err = syscall.GetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_RCVBUF)
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if err != nil {
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t.Errorf("getsockopt(SO_RCVBUF): %v", err)
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}
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snd, err = syscall.GetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDBUF)
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if err != nil {
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t.Errorf("getsockopt(SO_SNDBUF): %v", err)
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}
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})
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return rcv, snd
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}
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curRcv, curSnd := getBufs()
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trySetSocketBuffer(c.(nettype.PacketConn), t.Logf)
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newRcv, newSnd := getBufs()
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if curRcv > newRcv {
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t.Errorf("SO_RCVBUF decreased: %v -> %v", curRcv, newRcv)
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}
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if curSnd > newSnd {
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t.Errorf("SO_SNDBUF decreased: %v -> %v", curSnd, newSnd)
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}
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// On many systems we may not increase the value, particularly running as a
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// regular user, so log the information for manual verification.
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t.Logf("SO_RCVBUF: %v -> %v", curRcv, newRcv)
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t.Logf("SO_SNDBUF: %v -> %v", curRcv, newRcv)
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}
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