// Copyright (c) Tailscale Inc & AUTHORS // SPDX-License-Identifier: BSD-3-Clause package disco import ( "fmt" "net/netip" "reflect" "testing" "go4.org/mem" "tailscale.com/types/key" "tailscale.com/util/strs" ) 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: "ping_with_nodekey_src", m: &Ping{ TxID: [12]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}, NodeKey: key.NodePublicFromRaw32(mem.B([]byte{1: 1, 2: 2, 30: 30, 31: 31})), }, want: "01 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 00 01 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1e 1f", }, { 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: []netip.AddrPort{ netip.MustParseAddrPort("1.2.3.4:567"), netip.MustParseAddrPort("[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)) got, ok := strs.CutPrefix(got, "foo") if !ok { t.Fatalf("didn't start with foo: got %q", got) } 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) netip.AddrPort { ipp, err := netip.ParseAddrPort(s) if err != nil { panic(err) } return ipp }