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// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package disco
import (
"fmt"
"reflect"
"strings"
"testing"
"inet.af/netaddr"
)
func TestMarshalAndParse(t *testing.T) {
tests := []struct {
name string
want string
m Message
}{
{
name: "ping",
m: &Ping{
TxID: [12]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12},
},
want: "01 00 01 02 03 04 05 06 07 08 09 0a 0b 0c",
},
{
name: "pong",
m: &Pong{
TxID: [12]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12},
Src: mustIPPort("2.3.4.5:1234"),
},
want: "02 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 00 00 00 00 00 00 00 00 00 00 ff ff 02 03 04 05 04 d2",
},
{
name: "pongv6",
m: &Pong{
TxID: [12]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12},
Src: mustIPPort("[fed0::12]:6666"),
},
want: "02 00 01 02 03 04 05 06 07 08 09 0a 0b 0c fe d0 00 00 00 00 00 00 00 00 00 00 00 00 00 12 1a 0a",
},
{
name: "call_me_maybe",
m: &CallMeMaybe{},
want: "03 00",
},
{
name: "call_me_maybe_endpoints",
m: &CallMeMaybe{
MyNumber: []netaddr.IPPort{
netaddr.MustParseIPPort("1.2.3.4:567"),
netaddr.MustParseIPPort("[2001::3456]:789"),
},
},
want: "03 00 00 00 00 00 00 00 00 00 00 00 ff ff 01 02 03 04 02 37 20 01 00 00 00 00 00 00 00 00 00 00 00 00 34 56 03 15",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
foo := []byte("foo")
got := string(tt.m.AppendMarshal(foo))
if !strings.HasPrefix(got, "foo") {
t.Fatalf("didn't start with foo: got %q", got)
}
got = strings.TrimPrefix(got, "foo")
gotHex := fmt.Sprintf("% x", got)
if gotHex != tt.want {
t.Fatalf("wrong marshal\n got: %s\nwant: %s\n", gotHex, tt.want)
}
back, err := Parse([]byte(got))
if err != nil {
t.Fatalf("parse back: %v", err)
}
if !reflect.DeepEqual(back, tt.m) {
t.Errorf("message in %+v doesn't match Parse back result %+v", tt.m, back)
}
})
}
}
func mustIPPort(s string) netaddr.IPPort {
ipp, err := netaddr.ParseIPPort(s)
if err != nil {
panic(err)
}
return ipp
}
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