// Copyright (c) Tailscale Inc & AUTHORS // SPDX-License-Identifier: BSD-3-Clause package netutil import ( "io" "net" "net/netip" "runtime" "testing" ) type conn struct { net.Conn } func TestOneConnListener(t *testing.T) { c1 := new(conn) a1 := dummyAddr("a1") // Two Accepts ln := NewOneConnListener(c1, a1) if got := ln.Addr(); got != a1 { t.Errorf("Addr = %#v; want %#v", got, a1) } c, err := ln.Accept() if err != nil { t.Fatal(err) } if c != c1 { t.Fatalf("didn't get c1; got %p", c) } c, err = ln.Accept() if err != io.EOF { t.Errorf("got %v; want EOF", err) } if c != nil { t.Errorf("unexpected non-nil Conn") } // Close before Accept ln = NewOneConnListener(c1, a1) ln.Close() _, err = ln.Accept() if err != io.EOF { t.Fatalf("got %v; want EOF", err) } // Implicit addr ln = NewOneConnListener(c1, nil) if ln.Addr() == nil { t.Errorf("nil Addr") } } func TestIPForwardingEnabledLinux(t *testing.T) { if runtime.GOOS != "linux" { t.Skipf("skipping on %s", runtime.GOOS) } got, err := ipForwardingEnabledLinux(ipv4, "some-not-found-interface") if err != nil { t.Fatal(err) } if got { t.Errorf("got true; want false") } } func TestCheckReversePathFiltering(t *testing.T) { if runtime.GOOS != "linux" { t.Skipf("skipping on %s", runtime.GOOS) } warn, err := CheckReversePathFiltering([]netip.Prefix{ netip.MustParsePrefix("192.168.1.1/24"), }, nil) t.Logf("err: %v", err) t.Logf("warnings: %v", warn) }