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7d9b1de3aa
Treat UDP send EPERM errors as a lost UDP packet, not something super fatal. That's just the Linux firewall preventing it from going out. And add a leaf package net/neterror for that (and future) policy that all three packages can share, with tests. Updates #3619 Change-Id: Ibdb838c43ee9efe70f4f25f7fc7fdf4607ba9c1d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
56 lines
1001 B
Go
56 lines
1001 B
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package neterror
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import (
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"errors"
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"net"
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"os"
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"syscall"
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"testing"
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)
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func TestTreatAsLostUDP(t *testing.T) {
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tests := []struct {
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name string
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err error
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want bool
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}{
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{"nil", nil, false},
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{"non-nil", errors.New("foo"), false},
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{"eperm", syscall.EPERM, true},
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{
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name: "operror",
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err: &net.OpError{
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Op: "write",
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Err: &os.SyscallError{
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Syscall: "sendto",
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Err: syscall.EPERM,
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},
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},
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want: true,
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},
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{
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name: "host_unreach",
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err: &net.OpError{
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Op: "write",
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Err: &os.SyscallError{
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Syscall: "sendto",
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Err: syscall.EHOSTUNREACH,
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},
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},
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want: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := TreatAsLostUDP(tt.err); got != tt.want {
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t.Errorf("got = %v; want %v", got, tt.want)
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}
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})
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}
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}
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