types/ipproto: drop IPProto from IPProtoVersion

Based on https://github.com/golang/go/wiki/CodeReviewComments#package-names.

Updates #cleanup

Signed-off-by: Maisem Ali <maisem@tailscale.com>

net/tstun/wrap.go

@@ -673,16 +673,16 @@ func (c *natFamilyConfig) selectSrcIP(oldSrc, dst netip.Addr) netip.Addr {
 // natConfigFromWGConfig generates a natFamilyConfig from nm,
 // for the indicated address family.
 // If NAT is not required for that address family, it returns nil.
-func natConfigFromWGConfig(wcfg *wgcfg.Config, addrFam ipproto.IPProtoVersion) *natFamilyConfig {
+func natConfigFromWGConfig(wcfg *wgcfg.Config, addrFam ipproto.Version) *natFamilyConfig {
 	if wcfg == nil {
 		return nil
 	}
 
 	var nativeAddr netip.Addr
 	switch addrFam {
-	case ipproto.IPProtoVersion4:
+	case ipproto.Version4:
 		nativeAddr = findV4(wcfg.Addresses)
-	case ipproto.IPProtoVersion6:
+	case ipproto.Version6:
 		nativeAddr = findV6(wcfg.Addresses)
 	}
 	if !nativeAddr.IsValid() {
@@ -703,8 +703,8 @@ func natConfigFromWGConfig(wcfg *wgcfg.Config, addrFam ipproto.IPProtoVersion) *
 		isExitNode := slices.Contains(p.AllowedIPs, tsaddr.AllIPv4()) || slices.Contains(p.AllowedIPs, tsaddr.AllIPv6())
 		if isExitNode {
 			hasMasqAddrsForFamily := false ||
-				(addrFam == ipproto.IPProtoVersion4 && p.V4MasqAddr != nil && p.V4MasqAddr.IsValid()) ||
-				(addrFam == ipproto.IPProtoVersion6 && p.V6MasqAddr != nil && p.V6MasqAddr.IsValid())
+				(addrFam == ipproto.Version4 && p.V4MasqAddr != nil && p.V4MasqAddr.IsValid()) ||
+				(addrFam == ipproto.Version6 && p.V6MasqAddr != nil && p.V6MasqAddr.IsValid())
 			if hasMasqAddrsForFamily {
 				exitNodeRequiresMasq = true
 			}
@@ -714,10 +714,10 @@ func natConfigFromWGConfig(wcfg *wgcfg.Config, addrFam ipproto.IPProtoVersion) *
 	for i := range wcfg.Peers {
 		p := &wcfg.Peers[i]
 		var addrToUse netip.Addr
-		if addrFam == ipproto.IPProtoVersion4 && p.V4MasqAddr != nil && p.V4MasqAddr.IsValid() {
+		if addrFam == ipproto.Version4 && p.V4MasqAddr != nil && p.V4MasqAddr.IsValid() {
 			addrToUse = *p.V4MasqAddr
 			mak.Set(&listenAddrs, addrToUse, struct{}{})
-		} else if addrFam == ipproto.IPProtoVersion6 && p.V6MasqAddr != nil && p.V6MasqAddr.IsValid() {
+		} else if addrFam == ipproto.Version6 && p.V6MasqAddr != nil && p.V6MasqAddr.IsValid() {
 			addrToUse = *p.V6MasqAddr
 			mak.Set(&listenAddrs, addrToUse, struct{}{})
 		} else if exitNodeRequiresMasq {
@@ -741,7 +741,7 @@ func natConfigFromWGConfig(wcfg *wgcfg.Config, addrFam ipproto.IPProtoVersion) *
 
 // SetNetMap is called when a new NetworkMap is received.
 func (t *Wrapper) SetWGConfig(wcfg *wgcfg.Config) {
-	v4, v6 := natConfigFromWGConfig(wcfg, ipproto.IPProtoVersion4), natConfigFromWGConfig(wcfg, ipproto.IPProtoVersion6)
+	v4, v6 := natConfigFromWGConfig(wcfg, ipproto.Version4), natConfigFromWGConfig(wcfg, ipproto.Version6)
 	var cfg *natConfig
 	if v4 != nil || v6 != nil {
 		cfg = &natConfig{v4: v4, v6: v6}

net/tstun/wrap_test.go

@@ -617,7 +617,7 @@ func TestNATCfg(t *testing.T) {
 		p.AllowedIPs = append(p.AllowedIPs, otherAllowedIPs...)
 		return p
 	}
-	test := func(addrFam ipproto.IPProtoVersion) {
+	test := func(addrFam ipproto.Version) {
 		var (
 			noIP netip.Addr
 
@@ -635,7 +635,7 @@ func TestNATCfg(t *testing.T) {
 			exitRoute = netip.MustParsePrefix("0.0.0.0/0")
 			publicIP  = netip.MustParseAddr("8.8.8.8")
 		)
-		if addrFam == ipproto.IPProtoVersion6 {
+		if addrFam == ipproto.Version6 {
 			selfNativeIP = netip.MustParseAddr("fd7a:115c:a1e0::a")
 			selfEIP1 = netip.MustParseAddr("fd7a:115c:a1e0::1a")
 			selfEIP2 = netip.MustParseAddr("fd7a:115c:a1e0::1b")
@@ -817,8 +817,8 @@ func TestNATCfg(t *testing.T) {
 			})
 		}
 	}
-	test(ipproto.IPProtoVersion4)
-	test(ipproto.IPProtoVersion6)
+	test(ipproto.Version4)
+	test(ipproto.Version6)
 }
 
 // TestCaptureHook verifies that the Wrapper.captureHook callback is called

types/ipproto/ipproto.go

@@ -6,23 +6,23 @@ package ipproto
 
 import "fmt"
 
-// IPProtoVersion describes the IP address version.
-type IPProtoVersion uint8
+// Version describes the IP address version.
+type Version uint8
 
-// Valid IPProtoVersion values.
+// Valid Version values.
 const (
-	IPProtoVersion4 = 4
-	IPProtoVersion6 = 6
+	Version4 = 4
+	Version6 = 6
 )
 
-func (p IPProtoVersion) String() string {
+func (p Version) String() string {
 	switch p {
-	case IPProtoVersion4:
+	case Version4:
 		return "IPv4"
-	case IPProtoVersion6:
+	case Version6:
 		return "IPv6"
 	default:
-		return fmt.Sprintf("IPProtoVersion-%d", int(p))
+		return fmt.Sprintf("Version-%d", int(p))
 	}
 }