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54ba6194f7
IPv6 Unique Local Addresses are sometimes used with Network Prefix Translation to reach the Internet. In that respect their use is similar to the private IPv4 address ranges 10/8, 172.16/12, and 192.168/16. Treat them as sufficient for AnyInterfaceUp(), but specifically exclude Tailscale's own IPv6 ULA prefix to avoid mistakenly trying to bootstrap Tailscale using Tailscale. This helps in supporting Google Cloud Run, where the addresses are 169.254.8.1/32 and fddf:3978:feb1:d745::c001/128 on eth1. Signed-off-by: Denton Gentry <dgentry@tailscale.com>
69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package interfaces
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import (
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"encoding/json"
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"testing"
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"inet.af/netaddr"
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)
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func TestGetState(t *testing.T) {
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st, err := GetState()
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if err != nil {
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t.Fatal(err)
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}
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j, err := json.MarshalIndent(st, "", "\t")
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if err != nil {
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t.Errorf("JSON: %v", err)
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}
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t.Logf("Got: %s", j)
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t.Logf("As string: %s", st)
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st2, err := GetState()
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if err != nil {
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t.Fatal(err)
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}
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if !st.EqualFiltered(st2, FilterAll) {
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// let's assume nobody was changing the system network interfaces between
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// the two GetState calls.
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t.Fatal("two States back-to-back were not equal")
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}
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t.Logf("As string:\n\t%s", st)
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}
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func TestLikelyHomeRouterIP(t *testing.T) {
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gw, my, ok := LikelyHomeRouterIP()
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if !ok {
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t.Logf("no result")
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return
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}
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t.Logf("myIP = %v; gw = %v", my, gw)
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}
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func TestIsGlobalV6(t *testing.T) {
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tests := []struct {
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name string
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ip string
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want bool
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}{
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{"first ULA", "fc00::1", true},
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{"Tailscale", "fd7a:115c:a1e0::1", false},
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{"Cloud Run", "fddf:3978:feb1:d745::1", true},
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{"zeros", "0000:0000:0000:0000:0000:0000:0000:0000", false},
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{"Link Local", "fe80::1", false},
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{"Global", "2602::1", true},
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}
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for _, test := range tests {
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if got := isGlobalV6(netaddr.MustParseIP(test.ip)); got != test.want {
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t.Errorf("isGlobalV6(%s) = %v, want %v", test.name, got, test.want)
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}
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}
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}
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