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WIP: rebase fork onto upstream/main (v1.103.0) #15

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codinget wants to merge 670 commits from webnet into save/webnet-2026-07-29
pull from: webnet
merge into: :save/webnet-2026-07-29
Conversation 1 Commits 670 Files Changed 994
+178 -17
1 changed files with 178 additions and 17 deletions
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Showing only changes of commit 93dbd33ef7 - Show all commits
ipn/ipnlocal/local_test.go
+178 -17
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@@ -8161,38 +8161,199 @@ func TestStartPreservesLoginFlags(t *testing.T) {
}
func TestShouldUseOneCGNATRoute(t *testing.T) {
tstest.AssertNotParallel(t)
makeInterface := func(index int, name, addr string) netmon.Interface {
t.Helper()
_, ipnet, err := net.ParseCIDR(addr)
if err != nil {
t.Fatalf("invalid CIDR %q: %v", addr, err)
}
// Loopback interface:
flags := net.FlagUp
if strings.HasPrefix(name, "lo") || strings.HasPrefix(name, "Loopback") || name == "/net/ipifc/0" {
flags |= net.FlagLoopback
}
return netmon.Interface{
Interface: &net.Interface{
Index: index,
Name: name,
Flags: flags,
},
AltAddrs: []net.Addr{ipnet},
}
}
tests := []struct {
name string
versionOS string
ifaces []netmon.Interface
tsName string
tsIndex int
want bool
}{
{"android", "android", true},
{"macOS", "macOS", true},
{"plan9", "plan9", true},
{"linux", "linux", false},
{"windows", "windows", false},
{
name: "android/tailscale-cgnat",
versionOS: "android",
ifaces: []netmon.Interface{
makeInterface(1, "lo", "127.0.0.1/8"),
makeInterface(15, "rmnet_data1", "10.203.33.114/23"),
makeInterface(26, "tun0", "100.95.71.186/32"),
},
tsName: "tun0",
want: true,
},
{
name: "android/multiple-cgnats",
versionOS: "android",
ifaces: []netmon.Interface{
makeInterface(1, "lo", "127.0.0.1/8"),
makeInterface(2, "rmnet_data1", "100.124.0.1/32"),
makeInterface(26, "tun0", "100.95.71.186/32"),
},
tsName: "tun0",
want: false,
},
{
name: "linux/tailscale-cgnat",
versionOS: "linux",
ifaces: []netmon.Interface{
makeInterface(1, "lo", "127.0.0.1/8"),
makeInterface(2, "eth0", "10.203.33.114/23"),
makeInterface(3, "tailscale0", "100.95.71.186/32"),
},
tsName: "tailscale0",
tsIndex: 3,
want: false,
},
{
name: "linux/multiple-cgnats",
versionOS: "linux",
ifaces: []netmon.Interface{
makeInterface(1, "lo", "127.0.0.1/8"),
makeInterface(2, "eth0", "100.124.0.1/32"),
makeInterface(3, "tailscale0", "100.95.71.186/32"),
},
tsName: "tailscale0",
tsIndex: 3,
want: false,
},
{
name: "macOS/tailscale-cgnat",
versionOS: "macOS",
ifaces: []netmon.Interface{
makeInterface(1, "lo0", "127.0.0.1/8"),
makeInterface(2, "en0", "10.203.33.114/23"),
makeInterface(3, "utun0", "100.95.71.186/32"),
},
tsName: "utun0",
tsIndex: 3,
want: true,
},
{
name: "macOS/multiple-cgnats",
versionOS: "macOS",
ifaces: []netmon.Interface{
makeInterface(1, "lo0", "127.0.0.1/8"),
makeInterface(2, "en0", "100.124.0.1/32"),
makeInterface(3, "utun0", "100.95.71.186/32"),
},
tsName: "utun0",
tsIndex: 3,
want: false,
},
{
name: "plan9/tailscale-cgnat",
versionOS: "plan9",
ifaces: []netmon.Interface{
makeInterface(1, "/net/ipifc/0", "127.0.0.1/8"),
makeInterface(2, "/net/ipifc/1", "10.203.33.114/23"),
makeInterface(3, "/net/ipifc/2", "100.95.71.186/32"),
},
tsName: "/net/ipifc/2",
tsIndex: 3,
want: true,
},
{
name: "plan9/multiple-cgnats",
versionOS: "plan9",
ifaces: []netmon.Interface{
makeInterface(1, "/net/ipifc/0", "127.0.0.1/8"),
makeInterface(2, "/net/ipifc/1", "100.124.0.1/32"),
makeInterface(3, "/net/ipifc/2", "100.95.71.186/32"),
},
tsName: "/net/ipifc/2",
tsIndex: 3,
want: true,
},
{
name: "windows/tailscale-cgnat",
versionOS: "windows",
ifaces: []netmon.Interface{
makeInterface(1, "Loopback Pseudo-Interface 1", "127.0.0.1/8"),
makeInterface(2, "Wi-Fi", "10.203.33.114/23"),
makeInterface(3, "Tailscale", "100.95.71.186/32"),
},
tsName: "Tailscale",
tsIndex: 3,
want: false,
},
{
name: "windows/multiple-cgnats",
versionOS: "windows",
ifaces: []netmon.Interface{
makeInterface(1, "Loopback Pseudo-Interface 1", "127.0.0.1/8"),
makeInterface(2, "Wi-Fi", "100.124.0.1/32"),
makeInterface(3, "Tailscale", "100.95.71.186/32"),
},
tsName: "Tailscale",
tsIndex: 3,
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
tstest.AssertNotParallel(t)
// Stub out the network interfaces from the system.
t.Cleanup(func() {
netmon.RegisterInterfaceGetter(nil)
})
netmon.RegisterInterfaceGetter(func() ([]netmon.Interface, error) {
return tt.ifaces, nil
})
// Stub out the Tailscale interface properties.
tsName, _ := netmon.TailscaleInterfaceName()
tsIndex, _ := netmon.TailscaleInterfaceIndex()
t.Cleanup(func() {
netmon.SetTailscaleInterfaceProps(tsName, tsIndex)
})
netmon.SetTailscaleInterfaceProps(tt.tsName, tt.tsIndex)
got := shouldUseOneCGNATRoute(t.Logf, nil, nil, tt.versionOS)
if got != tt.want {
t.Errorf("shouldUseOneCGNATRoute(%q) = %v; want %v", tt.versionOS, got, tt.want)
}
// Control knob takes precedence over everything.
t.Run("control-knob-override", func(t *testing.T) {
knobs := &controlknobs.Knobs{}
knobs.OneCGNAT.Store(opt.NewBool(false))
if got := shouldUseOneCGNATRoute(t.Logf, nil, knobs, tt.versionOS); got {
t.Errorf("control knob should override %s; got true, want false", tt.versionOS)
}
knobs.OneCGNAT.Store(opt.NewBool(true))
if got := shouldUseOneCGNATRoute(t.Logf, nil, knobs, tt.versionOS); !got {
t.Errorf("control knob should override %s; got false, want true", tt.versionOS)
}
})
})
}
// Control knob takes precedence over everything.
t.Run("control-knob-override", func(t *testing.T) {
knobs := &controlknobs.Knobs{}
knobs.OneCGNAT.Store(opt.NewBool(false))
if got := shouldUseOneCGNATRoute(t.Logf, nil, knobs, "android"); got {
t.Error("control knob should override android default; got true, want false")
}
knobs.OneCGNAT.Store(opt.NewBool(true))
if got := shouldUseOneCGNATRoute(t.Logf, nil, knobs, "linux"); !got {
t.Error("control knob should override linux default; got false, want true")
}
})
}
func TestPeerRoutesCGNATCollapse(t *testing.T) {