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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package packet
import (
"bytes"
"encoding/hex"
"net/netip"
"slices"
"testing"
"go4.org/mem"
"tailscale.com/types/key"
)
func TestTailscaleRejectedHeader(t *testing.T) {
tests := []struct {
h TailscaleRejectedHeader
wantStr string
}{
{
h: TailscaleRejectedHeader{
IPSrc: netip.MustParseAddr("5.5.5.5"),
IPDst: netip.MustParseAddr("1.2.3.4"),
Src: netip.MustParseAddrPort("1.2.3.4:567"),
Dst: netip.MustParseAddrPort("5.5.5.5:443"),
Proto: TCP,
Reason: RejectedDueToACLs,
},
wantStr: "TSMP-reject-flow{TCP 1.2.3.4:567 > 5.5.5.5:443}: acl",
},
{
h: TailscaleRejectedHeader{
IPSrc: netip.MustParseAddr("2::2"),
IPDst: netip.MustParseAddr("1::1"),
Src: netip.MustParseAddrPort("[1::1]:567"),
Dst: netip.MustParseAddrPort("[2::2]:443"),
Proto: UDP,
Reason: RejectedDueToShieldsUp,
},
wantStr: "TSMP-reject-flow{UDP [1::1]:567 > [2::2]:443}: shields",
},
{
h: TailscaleRejectedHeader{
IPSrc: netip.MustParseAddr("2::2"),
IPDst: netip.MustParseAddr("1::1"),
Src: netip.MustParseAddrPort("[1::1]:567"),
Dst: netip.MustParseAddrPort("[2::2]:443"),
Proto: UDP,
Reason: RejectedDueToIPForwarding,
MaybeBroken: true,
},
wantStr: "TSMP-reject-flow{UDP [1::1]:567 > [2::2]:443}: host-ip-forwarding-unavailable",
},
}
for i, tt := range tests {
gotStr := tt.h.String()
if gotStr != tt.wantStr {
t.Errorf("%v. String = %q; want %q", i, gotStr, tt.wantStr)
continue
}
pkt := make([]byte, tt.h.Len())
tt.h.Marshal(pkt)
var p Parsed
p.Decode(pkt)
t.Logf("Parsed: %+v", p)
t.Logf("Parsed: %s", p.String())
back, ok := p.AsTailscaleRejectedHeader()
if !ok {
t.Errorf("%v. %q (%02x) didn't parse back", i, gotStr, pkt)
continue
}
if back != tt.h {
t.Errorf("%v. %q parsed back as %q", i, tt.h, back)
}
}
}
func TestTSMPDiscoKeyAdvertisementMarshal(t *testing.T) {
var (
// IPv4: Ver(4)Len(5), TOS, Len(53), ID, Flags, TTL(64), Proto(99), Cksum
headerV4, _ = hex.DecodeString("45000035000000004063705d")
// IPv6: Ver(6)TCFlow, Len(33), NextHdr(99), HopLim(64)
headerV6, _ = hex.DecodeString("6000000000216340")
packetType = []byte{'a'}
testKey = bytes.Repeat([]byte{'a'}, 32)
// IPs
srcV4 = netip.MustParseAddr("1.2.3.4")
dstV4 = netip.MustParseAddr("4.3.2.1")
srcV6 = netip.MustParseAddr("2001:db8::1")
dstV6 = netip.MustParseAddr("2001:db8::2")
)
join := func(parts ...[]byte) []byte {
return bytes.Join(parts, nil)
}
tests := []struct {
name string
tka TSMPDiscoKeyAdvertisement
want []byte
}{
{
name: "v4Header",
tka: TSMPDiscoKeyAdvertisement{
Src: srcV4,
Dst: dstV4,
Key: key.DiscoPublicFromRaw32(mem.B(testKey)),
},
want: join(headerV4, srcV4.AsSlice(), dstV4.AsSlice(), packetType, testKey),
},
{
name: "v6Header",
tka: TSMPDiscoKeyAdvertisement{
Src: srcV6,
Dst: dstV6,
Key: key.DiscoPublicFromRaw32(mem.B(testKey)),
},
want: join(headerV6, srcV6.AsSlice(), dstV6.AsSlice(), packetType, testKey),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := tt.tka.Marshal()
if err != nil {
t.Errorf("error mashalling TSMPDiscoAdvertisement: %s", err)
}
if !slices.Equal(got, tt.want) {
t.Errorf("error mashalling TSMPDiscoAdvertisement, expected: \n%x, \ngot:\n%x", tt.want, got)
}
})
}
}
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