summaryrefslogtreecommitdiffstats
path: root/src/net/interface_test.go
diff options
context:
space:
mode:
Diffstat (limited to 'src/net/interface_test.go')
-rw-r--r--src/net/interface_test.go376
1 files changed, 376 insertions, 0 deletions
diff --git a/src/net/interface_test.go b/src/net/interface_test.go
new file mode 100644
index 0000000..b2ef21e
--- /dev/null
+++ b/src/net/interface_test.go
@@ -0,0 +1,376 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !js
+
+package net
+
+import (
+ "fmt"
+ "reflect"
+ "runtime"
+ "testing"
+)
+
+// loopbackInterface returns an available logical network interface
+// for loopback tests. It returns nil if no suitable interface is
+// found.
+func loopbackInterface() *Interface {
+ ift, err := Interfaces()
+ if err != nil {
+ return nil
+ }
+ for _, ifi := range ift {
+ if ifi.Flags&FlagLoopback != 0 && ifi.Flags&FlagUp != 0 {
+ return &ifi
+ }
+ }
+ return nil
+}
+
+// ipv6LinkLocalUnicastAddr returns an IPv6 link-local unicast address
+// on the given network interface for tests. It returns "" if no
+// suitable address is found.
+func ipv6LinkLocalUnicastAddr(ifi *Interface) string {
+ if ifi == nil {
+ return ""
+ }
+ ifat, err := ifi.Addrs()
+ if err != nil {
+ return ""
+ }
+ for _, ifa := range ifat {
+ if ifa, ok := ifa.(*IPNet); ok {
+ if ifa.IP.To4() == nil && ifa.IP.IsLinkLocalUnicast() {
+ return ifa.IP.String()
+ }
+ }
+ }
+ return ""
+}
+
+func TestInterfaces(t *testing.T) {
+ ift, err := Interfaces()
+ if err != nil {
+ t.Fatal(err)
+ }
+ for _, ifi := range ift {
+ ifxi, err := InterfaceByIndex(ifi.Index)
+ if err != nil {
+ t.Fatal(err)
+ }
+ switch runtime.GOOS {
+ case "solaris", "illumos":
+ if ifxi.Index != ifi.Index {
+ t.Errorf("got %v; want %v", ifxi, ifi)
+ }
+ default:
+ if !reflect.DeepEqual(ifxi, &ifi) {
+ t.Errorf("got %v; want %v", ifxi, ifi)
+ }
+ }
+ ifxn, err := InterfaceByName(ifi.Name)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if !reflect.DeepEqual(ifxn, &ifi) {
+ t.Errorf("got %v; want %v", ifxn, ifi)
+ }
+ t.Logf("%s: flags=%v index=%d mtu=%d hwaddr=%v", ifi.Name, ifi.Flags, ifi.Index, ifi.MTU, ifi.HardwareAddr)
+ }
+}
+
+func TestInterfaceAddrs(t *testing.T) {
+ ift, err := Interfaces()
+ if err != nil {
+ t.Fatal(err)
+ }
+ ifStats := interfaceStats(ift)
+ ifat, err := InterfaceAddrs()
+ if err != nil {
+ t.Fatal(err)
+ }
+ uniStats, err := validateInterfaceUnicastAddrs(ifat)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if err := checkUnicastStats(ifStats, uniStats); err != nil {
+ t.Fatal(err)
+ }
+}
+
+func TestInterfaceUnicastAddrs(t *testing.T) {
+ ift, err := Interfaces()
+ if err != nil {
+ t.Fatal(err)
+ }
+ ifStats := interfaceStats(ift)
+ if err != nil {
+ t.Fatal(err)
+ }
+ var uniStats routeStats
+ for _, ifi := range ift {
+ ifat, err := ifi.Addrs()
+ if err != nil {
+ t.Fatal(ifi, err)
+ }
+ stats, err := validateInterfaceUnicastAddrs(ifat)
+ if err != nil {
+ t.Fatal(ifi, err)
+ }
+ uniStats.ipv4 += stats.ipv4
+ uniStats.ipv6 += stats.ipv6
+ }
+ if err := checkUnicastStats(ifStats, &uniStats); err != nil {
+ t.Fatal(err)
+ }
+}
+
+func TestInterfaceMulticastAddrs(t *testing.T) {
+ ift, err := Interfaces()
+ if err != nil {
+ t.Fatal(err)
+ }
+ ifStats := interfaceStats(ift)
+ ifat, err := InterfaceAddrs()
+ if err != nil {
+ t.Fatal(err)
+ }
+ uniStats, err := validateInterfaceUnicastAddrs(ifat)
+ if err != nil {
+ t.Fatal(err)
+ }
+ var multiStats routeStats
+ for _, ifi := range ift {
+ ifmat, err := ifi.MulticastAddrs()
+ if err != nil {
+ t.Fatal(ifi, err)
+ }
+ stats, err := validateInterfaceMulticastAddrs(ifmat)
+ if err != nil {
+ t.Fatal(ifi, err)
+ }
+ multiStats.ipv4 += stats.ipv4
+ multiStats.ipv6 += stats.ipv6
+ }
+ if err := checkMulticastStats(ifStats, uniStats, &multiStats); err != nil {
+ t.Fatal(err)
+ }
+}
+
+type ifStats struct {
+ loop int // # of active loopback interfaces
+ other int // # of active other interfaces
+}
+
+func interfaceStats(ift []Interface) *ifStats {
+ var stats ifStats
+ for _, ifi := range ift {
+ if ifi.Flags&FlagUp != 0 {
+ if ifi.Flags&FlagLoopback != 0 {
+ stats.loop++
+ } else {
+ stats.other++
+ }
+ }
+ }
+ return &stats
+}
+
+type routeStats struct {
+ ipv4, ipv6 int // # of active connected unicast, anycast or multicast routes
+}
+
+func validateInterfaceUnicastAddrs(ifat []Addr) (*routeStats, error) {
+ // Note: BSD variants allow assigning any IPv4/IPv6 address
+ // prefix to IP interface. For example,
+ // - 0.0.0.0/0 through 255.255.255.255/32
+ // - ::/0 through ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128
+ // In other words, there is no tightly-coupled combination of
+ // interface address prefixes and connected routes.
+ stats := new(routeStats)
+ for _, ifa := range ifat {
+ switch ifa := ifa.(type) {
+ case *IPNet:
+ if ifa == nil || ifa.IP == nil || ifa.IP.IsMulticast() || ifa.Mask == nil {
+ return nil, fmt.Errorf("unexpected value: %#v", ifa)
+ }
+ if len(ifa.IP) != IPv6len {
+ return nil, fmt.Errorf("should be internal representation either IPv6 or IPv4-mapped IPv6 address: %#v", ifa)
+ }
+ prefixLen, maxPrefixLen := ifa.Mask.Size()
+ if ifa.IP.To4() != nil {
+ if 0 >= prefixLen || prefixLen > 8*IPv4len || maxPrefixLen != 8*IPv4len {
+ return nil, fmt.Errorf("unexpected prefix length: %d/%d for %#v", prefixLen, maxPrefixLen, ifa)
+ }
+ if ifa.IP.IsLoopback() && prefixLen < 8 { // see RFC 1122
+ return nil, fmt.Errorf("unexpected prefix length: %d/%d for %#v", prefixLen, maxPrefixLen, ifa)
+ }
+ stats.ipv4++
+ }
+ if ifa.IP.To16() != nil && ifa.IP.To4() == nil {
+ if 0 >= prefixLen || prefixLen > 8*IPv6len || maxPrefixLen != 8*IPv6len {
+ return nil, fmt.Errorf("unexpected prefix length: %d/%d for %#v", prefixLen, maxPrefixLen, ifa)
+ }
+ if ifa.IP.IsLoopback() && prefixLen != 8*IPv6len { // see RFC 4291
+ return nil, fmt.Errorf("unexpected prefix length: %d/%d for %#v", prefixLen, maxPrefixLen, ifa)
+ }
+ stats.ipv6++
+ }
+ case *IPAddr:
+ if ifa == nil || ifa.IP == nil || ifa.IP.IsMulticast() {
+ return nil, fmt.Errorf("unexpected value: %#v", ifa)
+ }
+ if len(ifa.IP) != IPv6len {
+ return nil, fmt.Errorf("should be internal representation either IPv6 or IPv4-mapped IPv6 address: %#v", ifa)
+ }
+ if ifa.IP.To4() != nil {
+ stats.ipv4++
+ }
+ if ifa.IP.To16() != nil && ifa.IP.To4() == nil {
+ stats.ipv6++
+ }
+ default:
+ return nil, fmt.Errorf("unexpected type: %T", ifa)
+ }
+ }
+ return stats, nil
+}
+
+func validateInterfaceMulticastAddrs(ifat []Addr) (*routeStats, error) {
+ stats := new(routeStats)
+ for _, ifa := range ifat {
+ switch ifa := ifa.(type) {
+ case *IPAddr:
+ if ifa == nil || ifa.IP == nil || ifa.IP.IsUnspecified() || !ifa.IP.IsMulticast() {
+ return nil, fmt.Errorf("unexpected value: %#v", ifa)
+ }
+ if len(ifa.IP) != IPv6len {
+ return nil, fmt.Errorf("should be internal representation either IPv6 or IPv4-mapped IPv6 address: %#v", ifa)
+ }
+ if ifa.IP.To4() != nil {
+ stats.ipv4++
+ }
+ if ifa.IP.To16() != nil && ifa.IP.To4() == nil {
+ stats.ipv6++
+ }
+ default:
+ return nil, fmt.Errorf("unexpected type: %T", ifa)
+ }
+ }
+ return stats, nil
+}
+
+func checkUnicastStats(ifStats *ifStats, uniStats *routeStats) error {
+ // Test the existence of connected unicast routes for IPv4.
+ if supportsIPv4() && ifStats.loop+ifStats.other > 0 && uniStats.ipv4 == 0 {
+ return fmt.Errorf("num IPv4 unicast routes = 0; want >0; summary: %+v, %+v", ifStats, uniStats)
+ }
+ // Test the existence of connected unicast routes for IPv6.
+ // We can assume the existence of ::1/128 when at least one
+ // loopback interface is installed.
+ if supportsIPv6() && ifStats.loop > 0 && uniStats.ipv6 == 0 {
+ return fmt.Errorf("num IPv6 unicast routes = 0; want >0; summary: %+v, %+v", ifStats, uniStats)
+ }
+ return nil
+}
+
+func checkMulticastStats(ifStats *ifStats, uniStats, multiStats *routeStats) error {
+ switch runtime.GOOS {
+ case "aix", "dragonfly", "netbsd", "openbsd", "plan9", "solaris", "illumos":
+ default:
+ // Test the existence of connected multicast route
+ // clones for IPv4. Unlike IPv6, IPv4 multicast
+ // capability is not a mandatory feature, and so IPv4
+ // multicast validation is ignored and we only check
+ // IPv6 below.
+ //
+ // Test the existence of connected multicast route
+ // clones for IPv6. Some platform never uses loopback
+ // interface as the nexthop for multicast routing.
+ // We can assume the existence of connected multicast
+ // route clones when at least two connected unicast
+ // routes, ::1/128 and other, are installed.
+ if supportsIPv6() && ifStats.loop > 0 && uniStats.ipv6 > 1 && multiStats.ipv6 == 0 {
+ return fmt.Errorf("num IPv6 multicast route clones = 0; want >0; summary: %+v, %+v, %+v", ifStats, uniStats, multiStats)
+ }
+ }
+ return nil
+}
+
+func BenchmarkInterfaces(b *testing.B) {
+ testHookUninstaller.Do(uninstallTestHooks)
+
+ for i := 0; i < b.N; i++ {
+ if _, err := Interfaces(); err != nil {
+ b.Fatal(err)
+ }
+ }
+}
+
+func BenchmarkInterfaceByIndex(b *testing.B) {
+ testHookUninstaller.Do(uninstallTestHooks)
+
+ ifi := loopbackInterface()
+ if ifi == nil {
+ b.Skip("loopback interface not found")
+ }
+ for i := 0; i < b.N; i++ {
+ if _, err := InterfaceByIndex(ifi.Index); err != nil {
+ b.Fatal(err)
+ }
+ }
+}
+
+func BenchmarkInterfaceByName(b *testing.B) {
+ testHookUninstaller.Do(uninstallTestHooks)
+
+ ifi := loopbackInterface()
+ if ifi == nil {
+ b.Skip("loopback interface not found")
+ }
+ for i := 0; i < b.N; i++ {
+ if _, err := InterfaceByName(ifi.Name); err != nil {
+ b.Fatal(err)
+ }
+ }
+}
+
+func BenchmarkInterfaceAddrs(b *testing.B) {
+ testHookUninstaller.Do(uninstallTestHooks)
+
+ for i := 0; i < b.N; i++ {
+ if _, err := InterfaceAddrs(); err != nil {
+ b.Fatal(err)
+ }
+ }
+}
+
+func BenchmarkInterfacesAndAddrs(b *testing.B) {
+ testHookUninstaller.Do(uninstallTestHooks)
+
+ ifi := loopbackInterface()
+ if ifi == nil {
+ b.Skip("loopback interface not found")
+ }
+ for i := 0; i < b.N; i++ {
+ if _, err := ifi.Addrs(); err != nil {
+ b.Fatal(err)
+ }
+ }
+}
+
+func BenchmarkInterfacesAndMulticastAddrs(b *testing.B) {
+ testHookUninstaller.Do(uninstallTestHooks)
+
+ ifi := loopbackInterface()
+ if ifi == nil {
+ b.Skip("loopback interface not found")
+ }
+ for i := 0; i < b.N; i++ {
+ if _, err := ifi.MulticastAddrs(); err != nil {
+ b.Fatal(err)
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 00:24:42 +0000