1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
package tunapi
import (
"errors"
"io"
"net"
"strings"
"testing"
)
func pipePair(t *testing.T) (*Conn, *Conn) {
t.Helper()
a, b := net.Pipe()
t.Cleanup(func() { a.Close(); b.Close() })
return NewConn(a), NewConn(b)
}
func TestMessagesGoAcrossOneLineEach(t *testing.T) {
client, server := pipePair(t)
sent := []Message{
Hello("1.2.3"),
{Type: TypeOpen, Proxy: "127.0.0.1:5000", Username: "u", Password: "p"},
{Type: TypeOpened, Interface: &Interface{Name: "Firefox VPN", Index: 31, LUID: 1 << 40}},
}
go func() {
for _, m := range sent {
if err := client.Send(m); err != nil {
t.Error(err)
}
}
client.Close()
}()
for i, want := range sent {
got, err := server.Receive()
if err != nil {
t.Fatalf("message %d: %v", i, err)
}
if got.Type != want.Type || got.Proxy != want.Proxy || got.Version != want.Version ||
(want.Interface != nil && (got.Interface == nil || *got.Interface != *want.Interface)) {
t.Fatalf("message %d: got %+v, want %+v", i, got, want)
}
}
if _, err := server.Receive(); !errors.Is(err, io.EOF) {
t.Fatalf("after the last message: %v, want EOF", err)
}
}
func TestAMessageLongerThanTheLimitIsRefused(t *testing.T) {
client, server := pipePair(t)
if err := client.Send(Message{Type: TypeError, Message: strings.Repeat("x", MaxMessage)}); !errors.Is(err, ErrTooLong) {
t.Fatalf("sending: %v, want ErrTooLong", err)
}
go func() {
// A peer that ignores the limit.
_, _ = client.Raw().Write([]byte(`{"type":"error","message":"` + strings.Repeat("x", MaxMessage) + "\"}\n"))
}()
if _, err := server.Receive(); !errors.Is(err, ErrTooLong) {
t.Fatalf("receiving: %v, want ErrTooLong", err)
}
}
func TestALineThatIsNotAMessageIsAnError(t *testing.T) {
client, server := pipePair(t)
go func() { _, _ = client.Raw().Write([]byte("{\"protocol\":1}\nnot json\n")) }()
for range 2 {
if _, err := server.Receive(); err == nil {
t.Fatal("a line without a type or not JSON was accepted")
}
}
}
func TestTheCommonProtocolIsTheNewestBothSpeak(t *testing.T) {
for _, c := range []struct{ protocol, min, want int }{
{Protocol, MinProtocol, Protocol},
{Protocol + 5, Protocol, Protocol},
{Protocol + 5, Protocol + 1, 0}, // the peer dropped ours
{MinProtocol - 1, MinProtocol - 1, 0},
} {
if got := Common(c.protocol, c.min); got != c.want {
t.Errorf("Common(%d, %d) = %d, want %d", c.protocol, c.min, got, c.want)
}
}
}
func TestErrorsAndFailuresBecomeGoErrors(t *testing.T) {
if AsError(Message{Type: TypeRouted}) != nil {
t.Fatal("a reply became an error")
}
err := AsError(Message{Type: TypeError, Code: CodeProtocol, Protocol: 3, MinProtocol: 2, Version: "2.0.0"})
var e *Error
if !errors.As(err, &e) || e.Code != CodeProtocol || e.Protocol != 3 || e.MinProtocol != 2 || e.Version != "2.0.0" {
t.Fatalf("got %#v", err)
}
if !strings.Contains(AsError(Message{Type: TypeFailed, Code: CodeAdapterLost, Message: "gone"}).Error(), "gone") {
t.Fatal("the failure's text is lost")
}
}
arblant