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-rw-r--r--src/net/netip/netip_test.go2150
1 files changed, 2150 insertions, 0 deletions
diff --git a/src/net/netip/netip_test.go b/src/net/netip/netip_test.go
new file mode 100644
index 0000000..a748ac3
--- /dev/null
+++ b/src/net/netip/netip_test.go
@@ -0,0 +1,2150 @@
+// Copyright 2020 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.
+
+package netip_test
+
+import (
+ "bytes"
+ "encoding/json"
+ "flag"
+ "fmt"
+ "internal/intern"
+ "internal/testenv"
+ "net"
+ . "net/netip"
+ "reflect"
+ "slices"
+ "sort"
+ "strings"
+ "testing"
+)
+
+var long = flag.Bool("long", false, "run long tests")
+
+type uint128 = Uint128
+
+var (
+ mustPrefix = MustParsePrefix
+ mustIP = MustParseAddr
+ mustIPPort = MustParseAddrPort
+)
+
+func TestParseAddr(t *testing.T) {
+ var validIPs = []struct {
+ in string
+ ip Addr // output of ParseAddr()
+ str string // output of String(). If "", use in.
+ wantErr string
+ }{
+ // Basic zero IPv4 address.
+ {
+ in: "0.0.0.0",
+ ip: MkAddr(Mk128(0, 0xffff00000000), Z4),
+ },
+ // Basic non-zero IPv4 address.
+ {
+ in: "192.168.140.255",
+ ip: MkAddr(Mk128(0, 0xffffc0a88cff), Z4),
+ },
+ // IPv4 address in windows-style "print all the digits" form.
+ {
+ in: "010.000.015.001",
+ wantErr: `ParseAddr("010.000.015.001"): IPv4 field has octet with leading zero`,
+ },
+ // IPv4 address with a silly amount of leading zeros.
+ {
+ in: "000001.00000002.00000003.000000004",
+ wantErr: `ParseAddr("000001.00000002.00000003.000000004"): IPv4 field has octet with leading zero`,
+ },
+ // 4-in-6 with octet with leading zero
+ {
+ in: "::ffff:1.2.03.4",
+ wantErr: `ParseAddr("::ffff:1.2.03.4"): ParseAddr("1.2.03.4"): IPv4 field has octet with leading zero (at "1.2.03.4")`,
+ },
+ // Basic zero IPv6 address.
+ {
+ in: "::",
+ ip: MkAddr(Mk128(0, 0), Z6noz),
+ },
+ // Localhost IPv6.
+ {
+ in: "::1",
+ ip: MkAddr(Mk128(0, 1), Z6noz),
+ },
+ // Fully expanded IPv6 address.
+ {
+ in: "fd7a:115c:a1e0:ab12:4843:cd96:626b:430b",
+ ip: MkAddr(Mk128(0xfd7a115ca1e0ab12, 0x4843cd96626b430b), Z6noz),
+ },
+ // IPv6 with elided fields in the middle.
+ {
+ in: "fd7a:115c::626b:430b",
+ ip: MkAddr(Mk128(0xfd7a115c00000000, 0x00000000626b430b), Z6noz),
+ },
+ // IPv6 with elided fields at the end.
+ {
+ in: "fd7a:115c:a1e0:ab12:4843:cd96::",
+ ip: MkAddr(Mk128(0xfd7a115ca1e0ab12, 0x4843cd9600000000), Z6noz),
+ },
+ // IPv6 with single elided field at the end.
+ {
+ in: "fd7a:115c:a1e0:ab12:4843:cd96:626b::",
+ ip: MkAddr(Mk128(0xfd7a115ca1e0ab12, 0x4843cd96626b0000), Z6noz),
+ str: "fd7a:115c:a1e0:ab12:4843:cd96:626b:0",
+ },
+ // IPv6 with single elided field in the middle.
+ {
+ in: "fd7a:115c:a1e0::4843:cd96:626b:430b",
+ ip: MkAddr(Mk128(0xfd7a115ca1e00000, 0x4843cd96626b430b), Z6noz),
+ str: "fd7a:115c:a1e0:0:4843:cd96:626b:430b",
+ },
+ // IPv6 with the trailing 32 bits written as IPv4 dotted decimal. (4in6)
+ {
+ in: "::ffff:192.168.140.255",
+ ip: MkAddr(Mk128(0, 0x0000ffffc0a88cff), Z6noz),
+ str: "::ffff:192.168.140.255",
+ },
+ // IPv6 with a zone specifier.
+ {
+ in: "fd7a:115c:a1e0:ab12:4843:cd96:626b:430b%eth0",
+ ip: MkAddr(Mk128(0xfd7a115ca1e0ab12, 0x4843cd96626b430b), intern.Get("eth0")),
+ },
+ // IPv6 with dotted decimal and zone specifier.
+ {
+ in: "1:2::ffff:192.168.140.255%eth1",
+ ip: MkAddr(Mk128(0x0001000200000000, 0x0000ffffc0a88cff), intern.Get("eth1")),
+ str: "1:2::ffff:c0a8:8cff%eth1",
+ },
+ // 4-in-6 with zone
+ {
+ in: "::ffff:192.168.140.255%eth1",
+ ip: MkAddr(Mk128(0, 0x0000ffffc0a88cff), intern.Get("eth1")),
+ str: "::ffff:192.168.140.255%eth1",
+ },
+ // IPv6 with capital letters.
+ {
+ in: "FD9E:1A04:F01D::1",
+ ip: MkAddr(Mk128(0xfd9e1a04f01d0000, 0x1), Z6noz),
+ str: "fd9e:1a04:f01d::1",
+ },
+ }
+
+ for _, test := range validIPs {
+ t.Run(test.in, func(t *testing.T) {
+ got, err := ParseAddr(test.in)
+ if err != nil {
+ if err.Error() == test.wantErr {
+ return
+ }
+ t.Fatal(err)
+ }
+ if test.wantErr != "" {
+ t.Fatalf("wanted error %q; got none", test.wantErr)
+ }
+ if got != test.ip {
+ t.Errorf("got %#v, want %#v", got, test.ip)
+ }
+
+ // Check that ParseAddr is a pure function.
+ got2, err := ParseAddr(test.in)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if got != got2 {
+ t.Errorf("ParseAddr(%q) got 2 different results: %#v, %#v", test.in, got, got2)
+ }
+
+ // Check that ParseAddr(ip.String()) is the identity function.
+ s := got.String()
+ got3, err := ParseAddr(s)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if got != got3 {
+ t.Errorf("ParseAddr(%q) != ParseAddr(ParseIP(%q).String()). Got %#v, want %#v", test.in, test.in, got3, got)
+ }
+
+ // Check that the slow-but-readable parser produces the same result.
+ slow, err := parseIPSlow(test.in)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if got != slow {
+ t.Errorf("ParseAddr(%q) = %#v, parseIPSlow(%q) = %#v", test.in, got, test.in, slow)
+ }
+
+ // Check that the parsed IP formats as expected.
+ s = got.String()
+ wants := test.str
+ if wants == "" {
+ wants = test.in
+ }
+ if s != wants {
+ t.Errorf("ParseAddr(%q).String() got %q, want %q", test.in, s, wants)
+ }
+
+ // Check that AppendTo matches MarshalText.
+ TestAppendToMarshal(t, got)
+
+ // Check that MarshalText/UnmarshalText work similarly to
+ // ParseAddr/String (see TestIPMarshalUnmarshal for
+ // marshal-specific behavior that's not common with
+ // ParseAddr/String).
+ js := `"` + test.in + `"`
+ var jsgot Addr
+ if err := json.Unmarshal([]byte(js), &jsgot); err != nil {
+ t.Fatal(err)
+ }
+ if jsgot != got {
+ t.Errorf("json.Unmarshal(%q) = %#v, want %#v", test.in, jsgot, got)
+ }
+ jsb, err := json.Marshal(jsgot)
+ if err != nil {
+ t.Fatal(err)
+ }
+ jswant := `"` + wants + `"`
+ jsback := string(jsb)
+ if jsback != jswant {
+ t.Errorf("Marshal(Unmarshal(%q)) = %s, want %s", test.in, jsback, jswant)
+ }
+ })
+ }
+
+ var invalidIPs = []string{
+ // Empty string
+ "",
+ // Garbage non-IP
+ "bad",
+ // Single number. Some parsers accept this as an IPv4 address in
+ // big-endian uint32 form, but we don't.
+ "1234",
+ // IPv4 with a zone specifier
+ "1.2.3.4%eth0",
+ // IPv4 field must have at least one digit
+ ".1.2.3",
+ "1.2.3.",
+ "1..2.3",
+ // IPv4 address too long
+ "1.2.3.4.5",
+ // IPv4 in dotted octal form
+ "0300.0250.0214.0377",
+ // IPv4 in dotted hex form
+ "0xc0.0xa8.0x8c.0xff",
+ // IPv4 in class B form
+ "192.168.12345",
+ // IPv4 in class B form, with a small enough number to be
+ // parseable as a regular dotted decimal field.
+ "127.0.1",
+ // IPv4 in class A form
+ "192.1234567",
+ // IPv4 in class A form, with a small enough number to be
+ // parseable as a regular dotted decimal field.
+ "127.1",
+ // IPv4 field has value >255
+ "192.168.300.1",
+ // IPv4 with too many fields
+ "192.168.0.1.5.6",
+ // IPv6 with not enough fields
+ "1:2:3:4:5:6:7",
+ // IPv6 with too many fields
+ "1:2:3:4:5:6:7:8:9",
+ // IPv6 with 8 fields and a :: expander
+ "1:2:3:4::5:6:7:8",
+ // IPv6 with a field bigger than 2b
+ "fe801::1",
+ // IPv6 with non-hex values in field
+ "fe80:tail:scal:e::",
+ // IPv6 with a zone delimiter but no zone.
+ "fe80::1%",
+ // IPv6 (without ellipsis) with too many fields for trailing embedded IPv4.
+ "ffff:ffff:ffff:ffff:ffff:ffff:ffff:192.168.140.255",
+ // IPv6 (with ellipsis) with too many fields for trailing embedded IPv4.
+ "ffff::ffff:ffff:ffff:ffff:ffff:ffff:192.168.140.255",
+ // IPv6 with invalid embedded IPv4.
+ "::ffff:192.168.140.bad",
+ // IPv6 with multiple ellipsis ::.
+ "fe80::1::1",
+ // IPv6 with invalid non hex/colon character.
+ "fe80:1?:1",
+ // IPv6 with truncated bytes after single colon.
+ "fe80:",
+ }
+
+ for _, s := range invalidIPs {
+ t.Run(s, func(t *testing.T) {
+ got, err := ParseAddr(s)
+ if err == nil {
+ t.Errorf("ParseAddr(%q) = %#v, want error", s, got)
+ }
+
+ slow, err := parseIPSlow(s)
+ if err == nil {
+ t.Errorf("parseIPSlow(%q) = %#v, want error", s, slow)
+ }
+
+ std := net.ParseIP(s)
+ if std != nil {
+ t.Errorf("net.ParseIP(%q) = %#v, want error", s, std)
+ }
+
+ if s == "" {
+ // Don't test unmarshaling of "" here, do it in
+ // IPMarshalUnmarshal.
+ return
+ }
+ var jsgot Addr
+ js := []byte(`"` + s + `"`)
+ if err := json.Unmarshal(js, &jsgot); err == nil {
+ t.Errorf("json.Unmarshal(%q) = %#v, want error", s, jsgot)
+ }
+ })
+ }
+}
+
+func TestAddrFromSlice(t *testing.T) {
+ tests := []struct {
+ ip []byte
+ wantAddr Addr
+ wantOK bool
+ }{
+ {
+ ip: []byte{10, 0, 0, 1},
+ wantAddr: mustIP("10.0.0.1"),
+ wantOK: true,
+ },
+ {
+ ip: []byte{0xfe, 0x80, 15: 0x01},
+ wantAddr: mustIP("fe80::01"),
+ wantOK: true,
+ },
+ {
+ ip: []byte{0, 1, 2},
+ wantAddr: Addr{},
+ wantOK: false,
+ },
+ {
+ ip: nil,
+ wantAddr: Addr{},
+ wantOK: false,
+ },
+ }
+ for _, tt := range tests {
+ addr, ok := AddrFromSlice(tt.ip)
+ if ok != tt.wantOK || addr != tt.wantAddr {
+ t.Errorf("AddrFromSlice(%#v) = %#v, %v, want %#v, %v", tt.ip, addr, ok, tt.wantAddr, tt.wantOK)
+ }
+ }
+}
+
+func TestIPv4Constructors(t *testing.T) {
+ if AddrFrom4([4]byte{1, 2, 3, 4}) != MustParseAddr("1.2.3.4") {
+ t.Errorf("don't match")
+ }
+}
+
+func TestAddrMarshalUnmarshalBinary(t *testing.T) {
+ tests := []struct {
+ ip string
+ wantSize int
+ }{
+ {"", 0}, // zero IP
+ {"1.2.3.4", 4},
+ {"fd7a:115c:a1e0:ab12:4843:cd96:626b:430b", 16},
+ {"::ffff:c000:0280", 16},
+ {"::ffff:c000:0280%eth0", 20},
+ }
+ for _, tc := range tests {
+ var ip Addr
+ if len(tc.ip) > 0 {
+ ip = mustIP(tc.ip)
+ }
+ b, err := ip.MarshalBinary()
+ if err != nil {
+ t.Fatal(err)
+ }
+ if len(b) != tc.wantSize {
+ t.Fatalf("%q encoded to size %d; want %d", tc.ip, len(b), tc.wantSize)
+ }
+ var ip2 Addr
+ if err := ip2.UnmarshalBinary(b); err != nil {
+ t.Fatal(err)
+ }
+ if ip != ip2 {
+ t.Fatalf("got %v; want %v", ip2, ip)
+ }
+ }
+
+ // Cannot unmarshal from unexpected IP length.
+ for _, n := range []int{3, 5} {
+ var ip2 Addr
+ if err := ip2.UnmarshalBinary(bytes.Repeat([]byte{1}, n)); err == nil {
+ t.Fatalf("unmarshaled from unexpected IP length %d", n)
+ }
+ }
+}
+
+func TestAddrPortMarshalTextString(t *testing.T) {
+ tests := []struct {
+ in AddrPort
+ want string
+ }{
+ {mustIPPort("1.2.3.4:80"), "1.2.3.4:80"},
+ {mustIPPort("[::]:80"), "[::]:80"},
+ {mustIPPort("[1::CAFE]:80"), "[1::cafe]:80"},
+ {mustIPPort("[1::CAFE%en0]:80"), "[1::cafe%en0]:80"},
+ {mustIPPort("[::FFFF:192.168.140.255]:80"), "[::ffff:192.168.140.255]:80"},
+ {mustIPPort("[::FFFF:192.168.140.255%en0]:80"), "[::ffff:192.168.140.255%en0]:80"},
+ }
+ for i, tt := range tests {
+ if got := tt.in.String(); got != tt.want {
+ t.Errorf("%d. for (%v, %v) String = %q; want %q", i, tt.in.Addr(), tt.in.Port(), got, tt.want)
+ }
+ mt, err := tt.in.MarshalText()
+ if err != nil {
+ t.Errorf("%d. for (%v, %v) MarshalText error: %v", i, tt.in.Addr(), tt.in.Port(), err)
+ continue
+ }
+ if string(mt) != tt.want {
+ t.Errorf("%d. for (%v, %v) MarshalText = %q; want %q", i, tt.in.Addr(), tt.in.Port(), mt, tt.want)
+ }
+ }
+}
+
+func TestAddrPortMarshalUnmarshalBinary(t *testing.T) {
+ tests := []struct {
+ ipport string
+ wantSize int
+ }{
+ {"1.2.3.4:51820", 4 + 2},
+ {"[fd7a:115c:a1e0:ab12:4843:cd96:626b:430b]:80", 16 + 2},
+ {"[::ffff:c000:0280]:65535", 16 + 2},
+ {"[::ffff:c000:0280%eth0]:1", 20 + 2},
+ }
+ for _, tc := range tests {
+ var ipport AddrPort
+ if len(tc.ipport) > 0 {
+ ipport = mustIPPort(tc.ipport)
+ }
+ b, err := ipport.MarshalBinary()
+ if err != nil {
+ t.Fatal(err)
+ }
+ if len(b) != tc.wantSize {
+ t.Fatalf("%q encoded to size %d; want %d", tc.ipport, len(b), tc.wantSize)
+ }
+ var ipport2 AddrPort
+ if err := ipport2.UnmarshalBinary(b); err != nil {
+ t.Fatal(err)
+ }
+ if ipport != ipport2 {
+ t.Fatalf("got %v; want %v", ipport2, ipport)
+ }
+ }
+
+ // Cannot unmarshal from unexpected lengths.
+ for _, n := range []int{3, 7} {
+ var ipport2 AddrPort
+ if err := ipport2.UnmarshalBinary(bytes.Repeat([]byte{1}, n)); err == nil {
+ t.Fatalf("unmarshaled from unexpected length %d", n)
+ }
+ }
+}
+
+func TestPrefixMarshalTextString(t *testing.T) {
+ tests := []struct {
+ in Prefix
+ want string
+ }{
+ {mustPrefix("1.2.3.4/24"), "1.2.3.4/24"},
+ {mustPrefix("fd7a:115c:a1e0:ab12:4843:cd96:626b:430b/118"), "fd7a:115c:a1e0:ab12:4843:cd96:626b:430b/118"},
+ {mustPrefix("::ffff:c000:0280/96"), "::ffff:192.0.2.128/96"},
+ {mustPrefix("::ffff:192.168.140.255/8"), "::ffff:192.168.140.255/8"},
+ {PrefixFrom(mustIP("::ffff:c000:0280").WithZone("eth0"), 37), "::ffff:192.0.2.128/37"}, // Zone should be stripped
+ }
+ for i, tt := range tests {
+ if got := tt.in.String(); got != tt.want {
+ t.Errorf("%d. for %v String = %q; want %q", i, tt.in, got, tt.want)
+ }
+ mt, err := tt.in.MarshalText()
+ if err != nil {
+ t.Errorf("%d. for %v MarshalText error: %v", i, tt.in, err)
+ continue
+ }
+ if string(mt) != tt.want {
+ t.Errorf("%d. for %v MarshalText = %q; want %q", i, tt.in, mt, tt.want)
+ }
+ }
+}
+
+func TestPrefixMarshalUnmarshalBinary(t *testing.T) {
+ type testCase struct {
+ prefix Prefix
+ wantSize int
+ }
+ tests := []testCase{
+ {mustPrefix("1.2.3.4/24"), 4 + 1},
+ {mustPrefix("fd7a:115c:a1e0:ab12:4843:cd96:626b:430b/118"), 16 + 1},
+ {mustPrefix("::ffff:c000:0280/96"), 16 + 1},
+ {PrefixFrom(mustIP("::ffff:c000:0280").WithZone("eth0"), 37), 16 + 1}, // Zone should be stripped
+ }
+ tests = append(tests,
+ testCase{PrefixFrom(tests[0].prefix.Addr(), 33), tests[0].wantSize},
+ testCase{PrefixFrom(tests[1].prefix.Addr(), 129), tests[1].wantSize})
+ for _, tc := range tests {
+ prefix := tc.prefix
+ b, err := prefix.MarshalBinary()
+ if err != nil {
+ t.Fatal(err)
+ }
+ if len(b) != tc.wantSize {
+ t.Fatalf("%q encoded to size %d; want %d", tc.prefix, len(b), tc.wantSize)
+ }
+ var prefix2 Prefix
+ if err := prefix2.UnmarshalBinary(b); err != nil {
+ t.Fatal(err)
+ }
+ if prefix != prefix2 {
+ t.Fatalf("got %v; want %v", prefix2, prefix)
+ }
+ }
+
+ // Cannot unmarshal from unexpected lengths.
+ for _, n := range []int{3, 6} {
+ var prefix2 Prefix
+ if err := prefix2.UnmarshalBinary(bytes.Repeat([]byte{1}, n)); err == nil {
+ t.Fatalf("unmarshaled from unexpected length %d", n)
+ }
+ }
+}
+
+func TestAddrMarshalUnmarshal(t *testing.T) {
+ // This only tests the cases where Marshal/Unmarshal diverges from
+ // the behavior of ParseAddr/String. For the rest of the test cases,
+ // see TestParseAddr above.
+ orig := `""`
+ var ip Addr
+ if err := json.Unmarshal([]byte(orig), &ip); err != nil {
+ t.Fatalf("Unmarshal(%q) got error %v", orig, err)
+ }
+ if ip != (Addr{}) {
+ t.Errorf("Unmarshal(%q) is not the zero Addr", orig)
+ }
+
+ jsb, err := json.Marshal(ip)
+ if err != nil {
+ t.Fatalf("Marshal(%v) got error %v", ip, err)
+ }
+ back := string(jsb)
+ if back != orig {
+ t.Errorf("Marshal(Unmarshal(%q)) got %q, want %q", orig, back, orig)
+ }
+}
+
+func TestAddrFrom16(t *testing.T) {
+ tests := []struct {
+ name string
+ in [16]byte
+ want Addr
+ }{
+ {
+ name: "v6-raw",
+ in: [...]byte{15: 1},
+ want: MkAddr(Mk128(0, 1), Z6noz),
+ },
+ {
+ name: "v4-raw",
+ in: [...]byte{10: 0xff, 11: 0xff, 12: 1, 13: 2, 14: 3, 15: 4},
+ want: MkAddr(Mk128(0, 0xffff01020304), Z6noz),
+ },
+ }
+ for _, tt := range tests {
+ t.Run(tt.name, func(t *testing.T) {
+ got := AddrFrom16(tt.in)
+ if got != tt.want {
+ t.Errorf("got %#v; want %#v", got, tt.want)
+ }
+ })
+ }
+}
+
+func TestIPProperties(t *testing.T) {
+ var (
+ nilIP Addr
+
+ unicast4 = mustIP("192.0.2.1")
+ unicast6 = mustIP("2001:db8::1")
+ unicastZone6 = mustIP("2001:db8::1%eth0")
+ unicast6Unassigned = mustIP("4000::1") // not in 2000::/3.
+
+ multicast4 = mustIP("224.0.0.1")
+ multicast6 = mustIP("ff02::1")
+ multicastZone6 = mustIP("ff02::1%eth0")
+
+ llu4 = mustIP("169.254.0.1")
+ llu6 = mustIP("fe80::1")
+ llu6Last = mustIP("febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff")
+ lluZone6 = mustIP("fe80::1%eth0")
+
+ loopback4 = mustIP("127.0.0.1")
+
+ ilm6 = mustIP("ff01::1")
+ ilmZone6 = mustIP("ff01::1%eth0")
+
+ private4a = mustIP("10.0.0.1")
+ private4b = mustIP("172.16.0.1")
+ private4c = mustIP("192.168.1.1")
+ private6 = mustIP("fd00::1")
+ )
+
+ tests := []struct {
+ name string
+ ip Addr
+ globalUnicast bool
+ interfaceLocalMulticast bool
+ linkLocalMulticast bool
+ linkLocalUnicast bool
+ loopback bool
+ multicast bool
+ private bool
+ unspecified bool
+ }{
+ {
+ name: "nil",
+ ip: nilIP,
+ },
+ {
+ name: "unicast v4Addr",
+ ip: unicast4,
+ globalUnicast: true,
+ },
+ {
+ name: "unicast v6Addr",
+ ip: unicast6,
+ globalUnicast: true,
+ },
+ {
+ name: "unicast v6AddrZone",
+ ip: unicastZone6,
+ globalUnicast: true,
+ },
+ {
+ name: "unicast v6Addr unassigned",
+ ip: unicast6Unassigned,
+ globalUnicast: true,
+ },
+ {
+ name: "multicast v4Addr",
+ ip: multicast4,
+ linkLocalMulticast: true,
+ multicast: true,
+ },
+ {
+ name: "multicast v6Addr",
+ ip: multicast6,
+ linkLocalMulticast: true,
+ multicast: true,
+ },
+ {
+ name: "multicast v6AddrZone",
+ ip: multicastZone6,
+ linkLocalMulticast: true,
+ multicast: true,
+ },
+ {
+ name: "link-local unicast v4Addr",
+ ip: llu4,
+ linkLocalUnicast: true,
+ },
+ {
+ name: "link-local unicast v6Addr",
+ ip: llu6,
+ linkLocalUnicast: true,
+ },
+ {
+ name: "link-local unicast v6Addr upper bound",
+ ip: llu6Last,
+ linkLocalUnicast: true,
+ },
+ {
+ name: "link-local unicast v6AddrZone",
+ ip: lluZone6,
+ linkLocalUnicast: true,
+ },
+ {
+ name: "loopback v4Addr",
+ ip: loopback4,
+ loopback: true,
+ },
+ {
+ name: "loopback v6Addr",
+ ip: IPv6Loopback(),
+ loopback: true,
+ },
+ {
+ name: "interface-local multicast v6Addr",
+ ip: ilm6,
+ interfaceLocalMulticast: true,
+ multicast: true,
+ },
+ {
+ name: "interface-local multicast v6AddrZone",
+ ip: ilmZone6,
+ interfaceLocalMulticast: true,
+ multicast: true,
+ },
+ {
+ name: "private v4Addr 10/8",
+ ip: private4a,
+ globalUnicast: true,
+ private: true,
+ },
+ {
+ name: "private v4Addr 172.16/12",
+ ip: private4b,
+ globalUnicast: true,
+ private: true,
+ },
+ {
+ name: "private v4Addr 192.168/16",
+ ip: private4c,
+ globalUnicast: true,
+ private: true,
+ },
+ {
+ name: "private v6Addr",
+ ip: private6,
+ globalUnicast: true,
+ private: true,
+ },
+ {
+ name: "unspecified v4Addr",
+ ip: IPv4Unspecified(),
+ unspecified: true,
+ },
+ {
+ name: "unspecified v6Addr",
+ ip: IPv6Unspecified(),
+ unspecified: true,
+ },
+ }
+
+ for _, tt := range tests {
+ t.Run(tt.name, func(t *testing.T) {
+ gu := tt.ip.IsGlobalUnicast()
+ if gu != tt.globalUnicast {
+ t.Errorf("IsGlobalUnicast(%v) = %v; want %v", tt.ip, gu, tt.globalUnicast)
+ }
+
+ ilm := tt.ip.IsInterfaceLocalMulticast()
+ if ilm != tt.interfaceLocalMulticast {
+ t.Errorf("IsInterfaceLocalMulticast(%v) = %v; want %v", tt.ip, ilm, tt.interfaceLocalMulticast)
+ }
+
+ llu := tt.ip.IsLinkLocalUnicast()
+ if llu != tt.linkLocalUnicast {
+ t.Errorf("IsLinkLocalUnicast(%v) = %v; want %v", tt.ip, llu, tt.linkLocalUnicast)
+ }
+
+ llm := tt.ip.IsLinkLocalMulticast()
+ if llm != tt.linkLocalMulticast {
+ t.Errorf("IsLinkLocalMulticast(%v) = %v; want %v", tt.ip, llm, tt.linkLocalMulticast)
+ }
+
+ lo := tt.ip.IsLoopback()
+ if lo != tt.loopback {
+ t.Errorf("IsLoopback(%v) = %v; want %v", tt.ip, lo, tt.loopback)
+ }
+
+ multicast := tt.ip.IsMulticast()
+ if multicast != tt.multicast {
+ t.Errorf("IsMulticast(%v) = %v; want %v", tt.ip, multicast, tt.multicast)
+ }
+
+ private := tt.ip.IsPrivate()
+ if private != tt.private {
+ t.Errorf("IsPrivate(%v) = %v; want %v", tt.ip, private, tt.private)
+ }
+
+ unspecified := tt.ip.IsUnspecified()
+ if unspecified != tt.unspecified {
+ t.Errorf("IsUnspecified(%v) = %v; want %v", tt.ip, unspecified, tt.unspecified)
+ }
+ })
+ }
+}
+
+func TestAddrWellKnown(t *testing.T) {
+ tests := []struct {
+ name string
+ ip Addr
+ std net.IP
+ }{
+ {
+ name: "IPv6 link-local all nodes",
+ ip: IPv6LinkLocalAllNodes(),
+ std: net.IPv6linklocalallnodes,
+ },
+ {
+ name: "IPv6 link-local all routers",
+ ip: IPv6LinkLocalAllRouters(),
+ std: net.IPv6linklocalallrouters,
+ },
+ {
+ name: "IPv6 loopback",
+ ip: IPv6Loopback(),
+ std: net.IPv6loopback,
+ },
+ {
+ name: "IPv6 unspecified",
+ ip: IPv6Unspecified(),
+ std: net.IPv6unspecified,
+ },
+ }
+
+ for _, tt := range tests {
+ t.Run(tt.name, func(t *testing.T) {
+ want := tt.std.String()
+ got := tt.ip.String()
+
+ if got != want {
+ t.Fatalf("got %s, want %s", got, want)
+ }
+ })
+ }
+}
+
+func TestAddrLessCompare(t *testing.T) {
+ tests := []struct {
+ a, b Addr
+ want bool
+ }{
+ {Addr{}, Addr{}, false},
+ {Addr{}, mustIP("1.2.3.4"), true},
+ {mustIP("1.2.3.4"), Addr{}, false},
+
+ {mustIP("1.2.3.4"), mustIP("0102:0304::0"), true},
+ {mustIP("0102:0304::0"), mustIP("1.2.3.4"), false},
+ {mustIP("1.2.3.4"), mustIP("1.2.3.4"), false},
+
+ {mustIP("::1"), mustIP("::2"), true},
+ {mustIP("::1"), mustIP("::1%foo"), true},
+ {mustIP("::1%foo"), mustIP("::2"), true},
+ {mustIP("::2"), mustIP("::3"), true},
+
+ {mustIP("::"), mustIP("0.0.0.0"), false},
+ {mustIP("0.0.0.0"), mustIP("::"), true},
+
+ {mustIP("::1%a"), mustIP("::1%b"), true},
+ {mustIP("::1%a"), mustIP("::1%a"), false},
+ {mustIP("::1%b"), mustIP("::1%a"), false},
+ }
+ for _, tt := range tests {
+ got := tt.a.Less(tt.b)
+ if got != tt.want {
+ t.Errorf("Less(%q, %q) = %v; want %v", tt.a, tt.b, got, tt.want)
+ }
+ cmp := tt.a.Compare(tt.b)
+ if got && cmp != -1 {
+ t.Errorf("Less(%q, %q) = true, but Compare = %v (not -1)", tt.a, tt.b, cmp)
+ }
+ if cmp < -1 || cmp > 1 {
+ t.Errorf("bogus Compare return value %v", cmp)
+ }
+ if cmp == 0 && tt.a != tt.b {
+ t.Errorf("Compare(%q, %q) = 0; but not equal", tt.a, tt.b)
+ }
+ if cmp == 1 && !tt.b.Less(tt.a) {
+ t.Errorf("Compare(%q, %q) = 1; but b.Less(a) isn't true", tt.a, tt.b)
+ }
+
+ // Also check inverse.
+ if got == tt.want && got {
+ got2 := tt.b.Less(tt.a)
+ if got2 {
+ t.Errorf("Less(%q, %q) was correctly %v, but so was Less(%q, %q)", tt.a, tt.b, got, tt.b, tt.a)
+ }
+ }
+ }
+
+ // And just sort.
+ values := []Addr{
+ mustIP("::1"),
+ mustIP("::2"),
+ Addr{},
+ mustIP("1.2.3.4"),
+ mustIP("8.8.8.8"),
+ mustIP("::1%foo"),
+ }
+ sort.Slice(values, func(i, j int) bool { return values[i].Less(values[j]) })
+ got := fmt.Sprintf("%s", values)
+ want := `[invalid IP 1.2.3.4 8.8.8.8 ::1 ::1%foo ::2]`
+ if got != want {
+ t.Errorf("unexpected sort\n got: %s\nwant: %s\n", got, want)
+ }
+}
+
+func TestAddrPortCompare(t *testing.T) {
+ tests := []struct {
+ a, b AddrPort
+ want int
+ }{
+ {AddrPort{}, AddrPort{}, 0},
+ {AddrPort{}, mustIPPort("1.2.3.4:80"), -1},
+
+ {mustIPPort("1.2.3.4:80"), mustIPPort("1.2.3.4:80"), 0},
+ {mustIPPort("[::1]:80"), mustIPPort("[::1]:80"), 0},
+
+ {mustIPPort("1.2.3.4:80"), mustIPPort("2.3.4.5:22"), -1},
+ {mustIPPort("[::1]:80"), mustIPPort("[::2]:22"), -1},
+
+ {mustIPPort("1.2.3.4:80"), mustIPPort("1.2.3.4:443"), -1},
+ {mustIPPort("[::1]:80"), mustIPPort("[::1]:443"), -1},
+
+ {mustIPPort("1.2.3.4:80"), mustIPPort("[0102:0304::0]:80"), -1},
+ }
+ for _, tt := range tests {
+ got := tt.a.Compare(tt.b)
+ if got != tt.want {
+ t.Errorf("Compare(%q, %q) = %v; want %v", tt.a, tt.b, got, tt.want)
+ }
+
+ // Also check inverse.
+ if got == tt.want {
+ got2 := tt.b.Compare(tt.a)
+ if want2 := -1 * tt.want; got2 != want2 {
+ t.Errorf("Compare(%q, %q) was correctly %v, but Compare(%q, %q) was %v", tt.a, tt.b, got, tt.b, tt.a, got2)
+ }
+ }
+ }
+
+ // And just sort.
+ values := []AddrPort{
+ mustIPPort("[::1]:80"),
+ mustIPPort("[::2]:80"),
+ AddrPort{},
+ mustIPPort("1.2.3.4:443"),
+ mustIPPort("8.8.8.8:8080"),
+ mustIPPort("[::1%foo]:1024"),
+ }
+ slices.SortFunc(values, func(a, b AddrPort) int { return a.Compare(b) })
+ got := fmt.Sprintf("%s", values)
+ want := `[invalid AddrPort 1.2.3.4:443 8.8.8.8:8080 [::1]:80 [::1%foo]:1024 [::2]:80]`
+ if got != want {
+ t.Errorf("unexpected sort\n got: %s\nwant: %s\n", got, want)
+ }
+}
+
+func TestPrefixCompare(t *testing.T) {
+ tests := []struct {
+ a, b Prefix
+ want int
+ }{
+ {Prefix{}, Prefix{}, 0},
+ {Prefix{}, mustPrefix("1.2.3.0/24"), -1},
+
+ {mustPrefix("1.2.3.0/24"), mustPrefix("1.2.3.0/24"), 0},
+ {mustPrefix("fe80::/64"), mustPrefix("fe80::/64"), 0},
+
+ {mustPrefix("1.2.3.0/24"), mustPrefix("1.2.4.0/24"), -1},
+ {mustPrefix("fe80::/64"), mustPrefix("fe90::/64"), -1},
+
+ {mustPrefix("1.2.0.0/16"), mustPrefix("1.2.0.0/24"), -1},
+ {mustPrefix("fe80::/48"), mustPrefix("fe80::/64"), -1},
+
+ {mustPrefix("1.2.3.0/24"), mustPrefix("fe80::/8"), -1},
+ }
+ for _, tt := range tests {
+ got := tt.a.Compare(tt.b)
+ if got != tt.want {
+ t.Errorf("Compare(%q, %q) = %v; want %v", tt.a, tt.b, got, tt.want)
+ }
+
+ // Also check inverse.
+ if got == tt.want {
+ got2 := tt.b.Compare(tt.a)
+ if want2 := -1 * tt.want; got2 != want2 {
+ t.Errorf("Compare(%q, %q) was correctly %v, but Compare(%q, %q) was %v", tt.a, tt.b, got, tt.b, tt.a, got2)
+ }
+ }
+ }
+
+ // And just sort.
+ values := []Prefix{
+ mustPrefix("1.2.3.0/24"),
+ mustPrefix("fe90::/64"),
+ mustPrefix("fe80::/64"),
+ mustPrefix("1.2.0.0/16"),
+ Prefix{},
+ mustPrefix("fe80::/48"),
+ mustPrefix("1.2.0.0/24"),
+ }
+ slices.SortFunc(values, func(a, b Prefix) int { return a.Compare(b) })
+ got := fmt.Sprintf("%s", values)
+ want := `[invalid Prefix 1.2.0.0/16 1.2.0.0/24 1.2.3.0/24 fe80::/48 fe80::/64 fe90::/64]`
+ if got != want {
+ t.Errorf("unexpected sort\n got: %s\nwant: %s\n", got, want)
+ }
+}
+
+func TestIPStringExpanded(t *testing.T) {
+ tests := []struct {
+ ip Addr
+ s string
+ }{
+ {
+ ip: Addr{},
+ s: "invalid IP",
+ },
+ {
+ ip: mustIP("192.0.2.1"),
+ s: "192.0.2.1",
+ },
+ {
+ ip: mustIP("::ffff:192.0.2.1"),
+ s: "0000:0000:0000:0000:0000:ffff:c000:0201",
+ },
+ {
+ ip: mustIP("2001:db8::1"),
+ s: "2001:0db8:0000:0000:0000:0000:0000:0001",
+ },
+ {
+ ip: mustIP("2001:db8::1%eth0"),
+ s: "2001:0db8:0000:0000:0000:0000:0000:0001%eth0",
+ },
+ }
+
+ for _, tt := range tests {
+ t.Run(tt.ip.String(), func(t *testing.T) {
+ want := tt.s
+ got := tt.ip.StringExpanded()
+
+ if got != want {
+ t.Fatalf("got %s, want %s", got, want)
+ }
+ })
+ }
+}
+
+func TestPrefixMasking(t *testing.T) {
+ type subtest struct {
+ ip Addr
+ bits uint8
+ p Prefix
+ ok bool
+ }
+
+ // makeIPv6 produces a set of IPv6 subtests with an optional zone identifier.
+ makeIPv6 := func(zone string) []subtest {
+ if zone != "" {
+ zone = "%" + zone
+ }
+
+ return []subtest{
+ {
+ ip: mustIP(fmt.Sprintf("2001:db8::1%s", zone)),
+ bits: 255,
+ },
+ {
+ ip: mustIP(fmt.Sprintf("2001:db8::1%s", zone)),
+ bits: 32,
+ p: mustPrefix("2001:db8::/32"),
+ ok: true,
+ },
+ {
+ ip: mustIP(fmt.Sprintf("fe80::dead:beef:dead:beef%s", zone)),
+ bits: 96,
+ p: mustPrefix("fe80::dead:beef:0:0/96"),
+ ok: true,
+ },
+ {
+ ip: mustIP(fmt.Sprintf("aaaa::%s", zone)),
+ bits: 4,
+ p: mustPrefix("a000::/4"),
+ ok: true,
+ },
+ {
+ ip: mustIP(fmt.Sprintf("::%s", zone)),
+ bits: 63,
+ p: mustPrefix("::/63"),
+ ok: true,
+ },
+ }
+ }
+
+ tests := []struct {
+ family string
+ subtests []subtest
+ }{
+ {
+ family: "nil",
+ subtests: []subtest{
+ {
+ bits: 255,
+ ok: true,
+ },
+ {
+ bits: 16,
+ ok: true,
+ },
+ },
+ },
+ {
+ family: "IPv4",
+ subtests: []subtest{
+ {
+ ip: mustIP("192.0.2.0"),
+ bits: 255,
+ },
+ {
+ ip: mustIP("192.0.2.0"),
+ bits: 16,
+ p: mustPrefix("192.0.0.0/16"),
+ ok: true,
+ },
+ {
+ ip: mustIP("255.255.255.255"),
+ bits: 20,
+ p: mustPrefix("255.255.240.0/20"),
+ ok: true,
+ },
+ {
+ // Partially masking one byte that contains both
+ // 1s and 0s on either side of the mask limit.
+ ip: mustIP("100.98.156.66"),
+ bits: 10,
+ p: mustPrefix("100.64.0.0/10"),
+ ok: true,
+ },
+ },
+ },
+ {
+ family: "IPv6",
+ subtests: makeIPv6(""),
+ },
+ {
+ family: "IPv6 zone",
+ subtests: makeIPv6("eth0"),
+ },
+ }
+
+ for _, tt := range tests {
+ t.Run(tt.family, func(t *testing.T) {
+ for _, st := range tt.subtests {
+ t.Run(st.p.String(), func(t *testing.T) {
+ // Ensure st.ip is not mutated.
+ orig := st.ip.String()
+
+ p, err := st.ip.Prefix(int(st.bits))
+ if st.ok && err != nil {
+ t.Fatalf("failed to produce prefix: %v", err)
+ }
+ if !st.ok && err == nil {
+ t.Fatal("expected an error, but none occurred")
+ }
+ if err != nil {
+ t.Logf("err: %v", err)
+ return
+ }
+
+ if !reflect.DeepEqual(p, st.p) {
+ t.Errorf("prefix = %q, want %q", p, st.p)
+ }
+
+ if got := st.ip.String(); got != orig {
+ t.Errorf("IP was mutated: %q, want %q", got, orig)
+ }
+ })
+ }
+ })
+ }
+}
+
+func TestPrefixMarshalUnmarshal(t *testing.T) {
+ tests := []string{
+ "",
+ "1.2.3.4/32",
+ "0.0.0.0/0",
+ "::/0",
+ "::1/128",
+ "2001:db8::/32",
+ }
+
+ for _, s := range tests {
+ t.Run(s, func(t *testing.T) {
+ // Ensure that JSON (and by extension, text) marshaling is
+ // sane by entering quoted input.
+ orig := `"` + s + `"`
+
+ var p Prefix
+ if err := json.Unmarshal([]byte(orig), &p); err != nil {
+ t.Fatalf("failed to unmarshal: %v", err)
+ }
+
+ pb, err := json.Marshal(p)
+ if err != nil {
+ t.Fatalf("failed to marshal: %v", err)
+ }
+
+ back := string(pb)
+ if orig != back {
+ t.Errorf("Marshal = %q; want %q", back, orig)
+ }
+ })
+ }
+}
+
+func TestPrefixUnmarshalTextNonZero(t *testing.T) {
+ ip := mustPrefix("fe80::/64")
+ if err := ip.UnmarshalText([]byte("xxx")); err == nil {
+ t.Fatal("unmarshaled into non-empty Prefix")
+ }
+}
+
+func TestIs4AndIs6(t *testing.T) {
+ tests := []struct {
+ ip Addr
+ is4 bool
+ is6 bool
+ }{
+ {Addr{}, false, false},
+ {mustIP("1.2.3.4"), true, false},
+ {mustIP("127.0.0.2"), true, false},
+ {mustIP("::1"), false, true},
+ {mustIP("::ffff:192.0.2.128"), false, true},
+ {mustIP("::fffe:c000:0280"), false, true},
+ {mustIP("::1%eth0"), false, true},
+ }
+ for _, tt := range tests {
+ got4 := tt.ip.Is4()
+ if got4 != tt.is4 {
+ t.Errorf("Is4(%q) = %v; want %v", tt.ip, got4, tt.is4)
+ }
+
+ got6 := tt.ip.Is6()
+ if got6 != tt.is6 {
+ t.Errorf("Is6(%q) = %v; want %v", tt.ip, got6, tt.is6)
+ }
+ }
+}
+
+func TestIs4In6(t *testing.T) {
+ tests := []struct {
+ ip Addr
+ want bool
+ wantUnmap Addr
+ }{
+ {Addr{}, false, Addr{}},
+ {mustIP("::ffff:c000:0280"), true, mustIP("192.0.2.128")},
+ {mustIP("::ffff:192.0.2.128"), true, mustIP("192.0.2.128")},
+ {mustIP("::ffff:192.0.2.128%eth0"), true, mustIP("192.0.2.128")},
+ {mustIP("::fffe:c000:0280"), false, mustIP("::fffe:c000:0280")},
+ {mustIP("::ffff:127.1.2.3"), true, mustIP("127.1.2.3")},
+ {mustIP("::ffff:7f01:0203"), true, mustIP("127.1.2.3")},
+ {mustIP("0:0:0:0:0000:ffff:127.1.2.3"), true, mustIP("127.1.2.3")},
+ {mustIP("0:0:0:0:000000:ffff:127.1.2.3"), true, mustIP("127.1.2.3")},
+ {mustIP("0:0:0:0::ffff:127.1.2.3"), true, mustIP("127.1.2.3")},
+ {mustIP("::1"), false, mustIP("::1")},
+ {mustIP("1.2.3.4"), false, mustIP("1.2.3.4")},
+ }
+ for _, tt := range tests {
+ got := tt.ip.Is4In6()
+ if got != tt.want {
+ t.Errorf("Is4In6(%q) = %v; want %v", tt.ip, got, tt.want)
+ }
+ u := tt.ip.Unmap()
+ if u != tt.wantUnmap {
+ t.Errorf("Unmap(%q) = %v; want %v", tt.ip, u, tt.wantUnmap)
+ }
+ }
+}
+
+func TestPrefixMasked(t *testing.T) {
+ tests := []struct {
+ prefix Prefix
+ masked Prefix
+ }{
+ {
+ prefix: mustPrefix("192.168.0.255/24"),
+ masked: mustPrefix("192.168.0.0/24"),
+ },
+ {
+ prefix: mustPrefix("2100::/3"),
+ masked: mustPrefix("2000::/3"),
+ },
+ {
+ prefix: PrefixFrom(mustIP("2000::"), 129),
+ masked: Prefix{},
+ },
+ {
+ prefix: PrefixFrom(mustIP("1.2.3.4"), 33),
+ masked: Prefix{},
+ },
+ }
+ for _, test := range tests {
+ t.Run(test.prefix.String(), func(t *testing.T) {
+ got := test.prefix.Masked()
+ if got != test.masked {
+ t.Errorf("Masked=%s, want %s", got, test.masked)
+ }
+ })
+ }
+}
+
+func TestPrefix(t *testing.T) {
+ tests := []struct {
+ prefix string
+ ip Addr
+ bits int
+ str string
+ contains []Addr
+ notContains []Addr
+ }{
+ {
+ prefix: "192.168.0.0/24",
+ ip: mustIP("192.168.0.0"),
+ bits: 24,
+ contains: mustIPs("192.168.0.1", "192.168.0.55"),
+ notContains: mustIPs("192.168.1.1", "1.1.1.1"),
+ },
+ {
+ prefix: "192.168.1.1/32",
+ ip: mustIP("192.168.1.1"),
+ bits: 32,
+ contains: mustIPs("192.168.1.1"),
+ notContains: mustIPs("192.168.1.2"),
+ },
+ {
+ prefix: "100.64.0.0/10", // CGNAT range; prefix not multiple of 8
+ ip: mustIP("100.64.0.0"),
+ bits: 10,
+ contains: mustIPs("100.64.0.0", "100.64.0.1", "100.81.251.94", "100.100.100.100", "100.127.255.254", "100.127.255.255"),
+ notContains: mustIPs("100.63.255.255", "100.128.0.0"),
+ },
+ {
+ prefix: "2001:db8::/96",
+ ip: mustIP("2001:db8::"),
+ bits: 96,
+ contains: mustIPs("2001:db8::aaaa:bbbb", "2001:db8::1"),
+ notContains: mustIPs("2001:db8::1:aaaa:bbbb", "2001:db9::"),
+ },
+ {
+ prefix: "0.0.0.0/0",
+ ip: mustIP("0.0.0.0"),
+ bits: 0,
+ contains: mustIPs("192.168.0.1", "1.1.1.1"),
+ notContains: append(mustIPs("2001:db8::1"), Addr{}),
+ },
+ {
+ prefix: "::/0",
+ ip: mustIP("::"),
+ bits: 0,
+ contains: mustIPs("::1", "2001:db8::1"),
+ notContains: mustIPs("192.0.2.1"),
+ },
+ {
+ prefix: "2000::/3",
+ ip: mustIP("2000::"),
+ bits: 3,
+ contains: mustIPs("2001:db8::1"),
+ notContains: mustIPs("fe80::1"),
+ },
+ }
+ for _, test := range tests {
+ t.Run(test.prefix, func(t *testing.T) {
+ prefix, err := ParsePrefix(test.prefix)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if prefix.Addr() != test.ip {
+ t.Errorf("IP=%s, want %s", prefix.Addr(), test.ip)
+ }
+ if prefix.Bits() != test.bits {
+ t.Errorf("bits=%d, want %d", prefix.Bits(), test.bits)
+ }
+ for _, ip := range test.contains {
+ if !prefix.Contains(ip) {
+ t.Errorf("does not contain %s", ip)
+ }
+ }
+ for _, ip := range test.notContains {
+ if prefix.Contains(ip) {
+ t.Errorf("contains %s", ip)
+ }
+ }
+ want := test.str
+ if want == "" {
+ want = test.prefix
+ }
+ if got := prefix.String(); got != want {
+ t.Errorf("prefix.String()=%q, want %q", got, want)
+ }
+
+ TestAppendToMarshal(t, prefix)
+ })
+ }
+}
+
+func TestPrefixFromInvalidBits(t *testing.T) {
+ v4 := MustParseAddr("1.2.3.4")
+ v6 := MustParseAddr("66::66")
+ tests := []struct {
+ ip Addr
+ in, want int
+ }{
+ {v4, 0, 0},
+ {v6, 0, 0},
+ {v4, 1, 1},
+ {v4, 33, -1},
+ {v6, 33, 33},
+ {v6, 127, 127},
+ {v6, 128, 128},
+ {v4, 254, -1},
+ {v4, 255, -1},
+ {v4, -1, -1},
+ {v6, -1, -1},
+ {v4, -5, -1},
+ {v6, -5, -1},
+ }
+ for _, tt := range tests {
+ p := PrefixFrom(tt.ip, tt.in)
+ if got := p.Bits(); got != tt.want {
+ t.Errorf("for (%v, %v), Bits out = %v; want %v", tt.ip, tt.in, got, tt.want)
+ }
+ }
+}
+
+func TestParsePrefixAllocs(t *testing.T) {
+ tests := []struct {
+ ip string
+ slash string
+ }{
+ {"192.168.1.0", "/24"},
+ {"aaaa:bbbb:cccc::", "/24"},
+ }
+ for _, test := range tests {
+ prefix := test.ip + test.slash
+ t.Run(prefix, func(t *testing.T) {
+ ipAllocs := int(testing.AllocsPerRun(5, func() {
+ ParseAddr(test.ip)
+ }))
+ prefixAllocs := int(testing.AllocsPerRun(5, func() {
+ ParsePrefix(prefix)
+ }))
+ if got := prefixAllocs - ipAllocs; got != 0 {
+ t.Errorf("allocs=%d, want 0", got)
+ }
+ })
+ }
+}
+
+func TestParsePrefixError(t *testing.T) {
+ tests := []struct {
+ prefix string
+ errstr string
+ }{
+ {
+ prefix: "192.168.0.0",
+ errstr: "no '/'",
+ },
+ {
+ prefix: "1.257.1.1/24",
+ errstr: "value >255",
+ },
+ {
+ prefix: "1.1.1.0/q",
+ errstr: "bad bits",
+ },
+ {
+ prefix: "1.1.1.0/-1",
+ errstr: "bad bits",
+ },
+ {
+ prefix: "1.1.1.0/33",
+ errstr: "out of range",
+ },
+ {
+ prefix: "2001::/129",
+ errstr: "out of range",
+ },
+ // Zones are not allowed: https://go.dev/issue/51899
+ {
+ prefix: "1.1.1.0%a/24",
+ errstr: "unexpected character",
+ },
+ {
+ prefix: "2001:db8::%a/32",
+ errstr: "zones cannot be present",
+ },
+ {
+ prefix: "1.1.1.0/+32",
+ errstr: "bad bits",
+ },
+ {
+ prefix: "1.1.1.0/-32",
+ errstr: "bad bits",
+ },
+ {
+ prefix: "1.1.1.0/032",
+ errstr: "bad bits",
+ },
+ {
+ prefix: "1.1.1.0/0032",
+ errstr: "bad bits",
+ },
+ }
+ for _, test := range tests {
+ t.Run(test.prefix, func(t *testing.T) {
+ _, err := ParsePrefix(test.prefix)
+ if err == nil {
+ t.Fatal("no error")
+ }
+ if got := err.Error(); !strings.Contains(got, test.errstr) {
+ t.Errorf("error is missing substring %q: %s", test.errstr, got)
+ }
+ })
+ }
+}
+
+func TestPrefixIsSingleIP(t *testing.T) {
+ tests := []struct {
+ ipp Prefix
+ want bool
+ }{
+ {ipp: mustPrefix("127.0.0.1/32"), want: true},
+ {ipp: mustPrefix("127.0.0.1/31"), want: false},
+ {ipp: mustPrefix("127.0.0.1/0"), want: false},
+ {ipp: mustPrefix("::1/128"), want: true},
+ {ipp: mustPrefix("::1/127"), want: false},
+ {ipp: mustPrefix("::1/0"), want: false},
+ {ipp: Prefix{}, want: false},
+ }
+ for _, tt := range tests {
+ got := tt.ipp.IsSingleIP()
+ if got != tt.want {
+ t.Errorf("IsSingleIP(%v) = %v want %v", tt.ipp, got, tt.want)
+ }
+ }
+}
+
+func mustIPs(strs ...string) []Addr {
+ var res []Addr
+ for _, s := range strs {
+ res = append(res, mustIP(s))
+ }
+ return res
+}
+
+func BenchmarkBinaryMarshalRoundTrip(b *testing.B) {
+ b.ReportAllocs()
+ tests := []struct {
+ name string
+ ip string
+ }{
+ {"ipv4", "1.2.3.4"},
+ {"ipv6", "2001:db8::1"},
+ {"ipv6+zone", "2001:db8::1%eth0"},
+ }
+ for _, tc := range tests {
+ b.Run(tc.name, func(b *testing.B) {
+ ip := mustIP(tc.ip)
+ for i := 0; i < b.N; i++ {
+ bt, err := ip.MarshalBinary()
+ if err != nil {
+ b.Fatal(err)
+ }
+ var ip2 Addr
+ if err := ip2.UnmarshalBinary(bt); err != nil {
+ b.Fatal(err)
+ }
+ }
+ })
+ }
+}
+
+func BenchmarkStdIPv4(b *testing.B) {
+ b.ReportAllocs()
+ ips := []net.IP{}
+ for i := 0; i < b.N; i++ {
+ ip := net.IPv4(8, 8, 8, 8)
+ ips = ips[:0]
+ for i := 0; i < 100; i++ {
+ ips = append(ips, ip)
+ }
+ }
+}
+
+func BenchmarkIPv4(b *testing.B) {
+ b.ReportAllocs()
+ ips := []Addr{}
+ for i := 0; i < b.N; i++ {
+ ip := IPv4(8, 8, 8, 8)
+ ips = ips[:0]
+ for i := 0; i < 100; i++ {
+ ips = append(ips, ip)
+ }
+ }
+}
+
+// ip4i was one of the possible representations of IP that came up in
+// discussions, inlining IPv4 addresses, but having an "overflow"
+// interface for IPv6 or IPv6 + zone. This is here for benchmarking.
+type ip4i struct {
+ ip4 [4]byte
+ flags1 byte
+ flags2 byte
+ flags3 byte
+ flags4 byte
+ ipv6 any
+}
+
+func newip4i_v4(a, b, c, d byte) ip4i {
+ return ip4i{ip4: [4]byte{a, b, c, d}}
+}
+
+// BenchmarkIPv4_inline benchmarks the candidate representation, ip4i.
+func BenchmarkIPv4_inline(b *testing.B) {
+ b.ReportAllocs()
+ ips := []ip4i{}
+ for i := 0; i < b.N; i++ {
+ ip := newip4i_v4(8, 8, 8, 8)
+ ips = ips[:0]
+ for i := 0; i < 100; i++ {
+ ips = append(ips, ip)
+ }
+ }
+}
+
+func BenchmarkStdIPv6(b *testing.B) {
+ b.ReportAllocs()
+ ips := []net.IP{}
+ for i := 0; i < b.N; i++ {
+ ip := net.ParseIP("2001:db8::1")
+ ips = ips[:0]
+ for i := 0; i < 100; i++ {
+ ips = append(ips, ip)
+ }
+ }
+}
+
+func BenchmarkIPv6(b *testing.B) {
+ b.ReportAllocs()
+ ips := []Addr{}
+ for i := 0; i < b.N; i++ {
+ ip := mustIP("2001:db8::1")
+ ips = ips[:0]
+ for i := 0; i < 100; i++ {
+ ips = append(ips, ip)
+ }
+ }
+}
+
+func BenchmarkIPv4Contains(b *testing.B) {
+ b.ReportAllocs()
+ prefix := PrefixFrom(IPv4(192, 168, 1, 0), 24)
+ ip := IPv4(192, 168, 1, 1)
+ for i := 0; i < b.N; i++ {
+ prefix.Contains(ip)
+ }
+}
+
+func BenchmarkIPv6Contains(b *testing.B) {
+ b.ReportAllocs()
+ prefix := MustParsePrefix("::1/128")
+ ip := MustParseAddr("::1")
+ for i := 0; i < b.N; i++ {
+ prefix.Contains(ip)
+ }
+}
+
+var parseBenchInputs = []struct {
+ name string
+ ip string
+}{
+ {"v4", "192.168.1.1"},
+ {"v6", "fd7a:115c:a1e0:ab12:4843:cd96:626b:430b"},
+ {"v6_ellipsis", "fd7a:115c::626b:430b"},
+ {"v6_v4", "::ffff:192.168.140.255"},
+ {"v6_zone", "1:2::ffff:192.168.140.255%eth1"},
+}
+
+func BenchmarkParseAddr(b *testing.B) {
+ sinkInternValue = intern.Get("eth1") // Pin to not benchmark the intern package
+ for _, test := range parseBenchInputs {
+ b.Run(test.name, func(b *testing.B) {
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkIP, _ = ParseAddr(test.ip)
+ }
+ })
+ }
+}
+
+func BenchmarkStdParseIP(b *testing.B) {
+ for _, test := range parseBenchInputs {
+ b.Run(test.name, func(b *testing.B) {
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkStdIP = net.ParseIP(test.ip)
+ }
+ })
+ }
+}
+
+func BenchmarkIPString(b *testing.B) {
+ for _, test := range parseBenchInputs {
+ ip := MustParseAddr(test.ip)
+ b.Run(test.name, func(b *testing.B) {
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkString = ip.String()
+ }
+ })
+ }
+}
+
+func BenchmarkIPStringExpanded(b *testing.B) {
+ for _, test := range parseBenchInputs {
+ ip := MustParseAddr(test.ip)
+ b.Run(test.name, func(b *testing.B) {
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkString = ip.StringExpanded()
+ }
+ })
+ }
+}
+
+func BenchmarkIPMarshalText(b *testing.B) {
+ b.ReportAllocs()
+ ip := MustParseAddr("66.55.44.33")
+ for i := 0; i < b.N; i++ {
+ sinkBytes, _ = ip.MarshalText()
+ }
+}
+
+func BenchmarkAddrPortString(b *testing.B) {
+ for _, test := range parseBenchInputs {
+ ip := MustParseAddr(test.ip)
+ ipp := AddrPortFrom(ip, 60000)
+ b.Run(test.name, func(b *testing.B) {
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkString = ipp.String()
+ }
+ })
+ }
+}
+
+func BenchmarkAddrPortMarshalText(b *testing.B) {
+ for _, test := range parseBenchInputs {
+ ip := MustParseAddr(test.ip)
+ ipp := AddrPortFrom(ip, 60000)
+ b.Run(test.name, func(b *testing.B) {
+ b.ReportAllocs()
+ for i := 0; i < b.N; i++ {
+ sinkBytes, _ = ipp.MarshalText()
+ }
+ })
+ }
+}
+
+func BenchmarkPrefixMasking(b *testing.B) {
+ tests := []struct {
+ name string
+ ip Addr
+ bits int
+ }{
+ {
+ name: "IPv4 /32",
+ ip: IPv4(192, 0, 2, 0),
+ bits: 32,
+ },
+ {
+ name: "IPv4 /17",
+ ip: IPv4(192, 0, 2, 0),
+ bits: 17,
+ },
+ {
+ name: "IPv4 /0",
+ ip: IPv4(192, 0, 2, 0),
+ bits: 0,
+ },
+ {
+ name: "IPv6 /128",
+ ip: mustIP("2001:db8::1"),
+ bits: 128,
+ },
+ {
+ name: "IPv6 /65",
+ ip: mustIP("2001:db8::1"),
+ bits: 65,
+ },
+ {
+ name: "IPv6 /0",
+ ip: mustIP("2001:db8::1"),
+ bits: 0,
+ },
+ {
+ name: "IPv6 zone /128",
+ ip: mustIP("2001:db8::1%eth0"),
+ bits: 128,
+ },
+ {
+ name: "IPv6 zone /65",
+ ip: mustIP("2001:db8::1%eth0"),
+ bits: 65,
+ },
+ {
+ name: "IPv6 zone /0",
+ ip: mustIP("2001:db8::1%eth0"),
+ bits: 0,
+ },
+ }
+
+ for _, tt := range tests {
+ b.Run(tt.name, func(b *testing.B) {
+ b.ReportAllocs()
+
+ for i := 0; i < b.N; i++ {
+ sinkPrefix, _ = tt.ip.Prefix(tt.bits)
+ }
+ })
+ }
+}
+
+func BenchmarkPrefixMarshalText(b *testing.B) {
+ b.ReportAllocs()
+ ipp := MustParsePrefix("66.55.44.33/22")
+ for i := 0; i < b.N; i++ {
+ sinkBytes, _ = ipp.MarshalText()
+ }
+}
+
+func BenchmarkParseAddrPort(b *testing.B) {
+ for _, test := range parseBenchInputs {
+ var ipp string
+ if strings.HasPrefix(test.name, "v6") {
+ ipp = fmt.Sprintf("[%s]:1234", test.ip)
+ } else {
+ ipp = fmt.Sprintf("%s:1234", test.ip)
+ }
+ b.Run(test.name, func(b *testing.B) {
+ b.ReportAllocs()
+
+ for i := 0; i < b.N; i++ {
+ sinkAddrPort, _ = ParseAddrPort(ipp)
+ }
+ })
+ }
+}
+
+func TestAs4(t *testing.T) {
+ tests := []struct {
+ ip Addr
+ want [4]byte
+ wantPanic bool
+ }{
+ {
+ ip: mustIP("1.2.3.4"),
+ want: [4]byte{1, 2, 3, 4},
+ },
+ {
+ ip: AddrFrom16(mustIP("1.2.3.4").As16()), // IPv4-in-IPv6
+ want: [4]byte{1, 2, 3, 4},
+ },
+ {
+ ip: mustIP("0.0.0.0"),
+ want: [4]byte{0, 0, 0, 0},
+ },
+ {
+ ip: Addr{},
+ wantPanic: true,
+ },
+ {
+ ip: mustIP("::1"),
+ wantPanic: true,
+ },
+ }
+ as4 := func(ip Addr) (v [4]byte, gotPanic bool) {
+ defer func() {
+ if recover() != nil {
+ gotPanic = true
+ return
+ }
+ }()
+ v = ip.As4()
+ return
+ }
+ for i, tt := range tests {
+ got, gotPanic := as4(tt.ip)
+ if gotPanic != tt.wantPanic {
+ t.Errorf("%d. panic on %v = %v; want %v", i, tt.ip, gotPanic, tt.wantPanic)
+ continue
+ }
+ if got != tt.want {
+ t.Errorf("%d. %v = %v; want %v", i, tt.ip, got, tt.want)
+ }
+ }
+}
+
+func TestPrefixOverlaps(t *testing.T) {
+ pfx := mustPrefix
+ tests := []struct {
+ a, b Prefix
+ want bool
+ }{
+ {Prefix{}, pfx("1.2.0.0/16"), false}, // first zero
+ {pfx("1.2.0.0/16"), Prefix{}, false}, // second zero
+ {pfx("::0/3"), pfx("0.0.0.0/3"), false}, // different families
+
+ {pfx("1.2.0.0/16"), pfx("1.2.0.0/16"), true}, // equal
+
+ {pfx("1.2.0.0/16"), pfx("1.2.3.0/24"), true},
+ {pfx("1.2.3.0/24"), pfx("1.2.0.0/16"), true},
+
+ {pfx("1.2.0.0/16"), pfx("1.2.3.0/32"), true},
+ {pfx("1.2.3.0/32"), pfx("1.2.0.0/16"), true},
+
+ // Match /0 either order
+ {pfx("1.2.3.0/32"), pfx("0.0.0.0/0"), true},
+ {pfx("0.0.0.0/0"), pfx("1.2.3.0/32"), true},
+
+ {pfx("1.2.3.0/32"), pfx("5.5.5.5/0"), true}, // normalization not required; /0 means true
+
+ // IPv6 overlapping
+ {pfx("5::1/128"), pfx("5::0/8"), true},
+ {pfx("5::0/8"), pfx("5::1/128"), true},
+
+ // IPv6 not overlapping
+ {pfx("1::1/128"), pfx("2::2/128"), false},
+ {pfx("0100::0/8"), pfx("::1/128"), false},
+
+ // IPv4-mapped IPv6 addresses should not overlap with IPv4.
+ {PrefixFrom(AddrFrom16(mustIP("1.2.0.0").As16()), 16), pfx("1.2.3.0/24"), false},
+
+ // Invalid prefixes
+ {PrefixFrom(mustIP("1.2.3.4"), 33), pfx("1.2.3.0/24"), false},
+ {PrefixFrom(mustIP("2000::"), 129), pfx("2000::/64"), false},
+ }
+ for i, tt := range tests {
+ if got := tt.a.Overlaps(tt.b); got != tt.want {
+ t.Errorf("%d. (%v).Overlaps(%v) = %v; want %v", i, tt.a, tt.b, got, tt.want)
+ }
+ // Overlaps is commutative
+ if got := tt.b.Overlaps(tt.a); got != tt.want {
+ t.Errorf("%d. (%v).Overlaps(%v) = %v; want %v", i, tt.b, tt.a, got, tt.want)
+ }
+ }
+}
+
+// Sink variables are here to force the compiler to not elide
+// seemingly useless work in benchmarks and allocation tests. If you
+// were to just `_ = foo()` within a test function, the compiler could
+// correctly deduce that foo() does nothing and doesn't need to be
+// called. By writing results to a global variable, we hide that fact
+// from the compiler and force it to keep the code under test.
+var (
+ sinkIP Addr
+ sinkStdIP net.IP
+ sinkAddrPort AddrPort
+ sinkPrefix Prefix
+ sinkPrefixSlice []Prefix
+ sinkInternValue *intern.Value
+ sinkIP16 [16]byte
+ sinkIP4 [4]byte
+ sinkBool bool
+ sinkString string
+ sinkBytes []byte
+ sinkUDPAddr = &net.UDPAddr{IP: make(net.IP, 0, 16)}
+)
+
+func TestNoAllocs(t *testing.T) {
+ // Wrappers that panic on error, to prove that our alloc-free
+ // methods are returning successfully.
+ panicIP := func(ip Addr, err error) Addr {
+ if err != nil {
+ panic(err)
+ }
+ return ip
+ }
+ panicPfx := func(pfx Prefix, err error) Prefix {
+ if err != nil {
+ panic(err)
+ }
+ return pfx
+ }
+ panicIPP := func(ipp AddrPort, err error) AddrPort {
+ if err != nil {
+ panic(err)
+ }
+ return ipp
+ }
+ test := func(name string, f func()) {
+ t.Run(name, func(t *testing.T) {
+ n := testing.AllocsPerRun(1000, f)
+ if n != 0 {
+ t.Fatalf("allocs = %d; want 0", int(n))
+ }
+ })
+ }
+
+ // Addr constructors
+ test("IPv4", func() { sinkIP = IPv4(1, 2, 3, 4) })
+ test("AddrFrom4", func() { sinkIP = AddrFrom4([4]byte{1, 2, 3, 4}) })
+ test("AddrFrom16", func() { sinkIP = AddrFrom16([16]byte{}) })
+ test("ParseAddr/4", func() { sinkIP = panicIP(ParseAddr("1.2.3.4")) })
+ test("ParseAddr/6", func() { sinkIP = panicIP(ParseAddr("::1")) })
+ test("MustParseAddr", func() { sinkIP = MustParseAddr("1.2.3.4") })
+ test("IPv6LinkLocalAllNodes", func() { sinkIP = IPv6LinkLocalAllNodes() })
+ test("IPv6LinkLocalAllRouters", func() { sinkIP = IPv6LinkLocalAllRouters() })
+ test("IPv6Loopback", func() { sinkIP = IPv6Loopback() })
+ test("IPv6Unspecified", func() { sinkIP = IPv6Unspecified() })
+
+ // Addr methods
+ test("Addr.IsZero", func() { sinkBool = MustParseAddr("1.2.3.4").IsZero() })
+ test("Addr.BitLen", func() { sinkBool = MustParseAddr("1.2.3.4").BitLen() == 8 })
+ test("Addr.Zone/4", func() { sinkBool = MustParseAddr("1.2.3.4").Zone() == "" })
+ test("Addr.Zone/6", func() { sinkBool = MustParseAddr("fe80::1").Zone() == "" })
+ test("Addr.Zone/6zone", func() { sinkBool = MustParseAddr("fe80::1%zone").Zone() == "" })
+ test("Addr.Compare", func() {
+ a := MustParseAddr("1.2.3.4")
+ b := MustParseAddr("2.3.4.5")
+ sinkBool = a.Compare(b) == 0
+ })
+ test("Addr.Less", func() {
+ a := MustParseAddr("1.2.3.4")
+ b := MustParseAddr("2.3.4.5")
+ sinkBool = a.Less(b)
+ })
+ test("Addr.Is4", func() { sinkBool = MustParseAddr("1.2.3.4").Is4() })
+ test("Addr.Is6", func() { sinkBool = MustParseAddr("fe80::1").Is6() })
+ test("Addr.Is4In6", func() { sinkBool = MustParseAddr("fe80::1").Is4In6() })
+ test("Addr.Unmap", func() { sinkIP = MustParseAddr("ffff::2.3.4.5").Unmap() })
+ test("Addr.WithZone", func() { sinkIP = MustParseAddr("fe80::1").WithZone("") })
+ test("Addr.IsGlobalUnicast", func() { sinkBool = MustParseAddr("2001:db8::1").IsGlobalUnicast() })
+ test("Addr.IsInterfaceLocalMulticast", func() { sinkBool = MustParseAddr("fe80::1").IsInterfaceLocalMulticast() })
+ test("Addr.IsLinkLocalMulticast", func() { sinkBool = MustParseAddr("fe80::1").IsLinkLocalMulticast() })
+ test("Addr.IsLinkLocalUnicast", func() { sinkBool = MustParseAddr("fe80::1").IsLinkLocalUnicast() })
+ test("Addr.IsLoopback", func() { sinkBool = MustParseAddr("fe80::1").IsLoopback() })
+ test("Addr.IsMulticast", func() { sinkBool = MustParseAddr("fe80::1").IsMulticast() })
+ test("Addr.IsPrivate", func() { sinkBool = MustParseAddr("fd00::1").IsPrivate() })
+ test("Addr.IsUnspecified", func() { sinkBool = IPv6Unspecified().IsUnspecified() })
+ test("Addr.Prefix/4", func() { sinkPrefix = panicPfx(MustParseAddr("1.2.3.4").Prefix(20)) })
+ test("Addr.Prefix/6", func() { sinkPrefix = panicPfx(MustParseAddr("fe80::1").Prefix(64)) })
+ test("Addr.As16", func() { sinkIP16 = MustParseAddr("1.2.3.4").As16() })
+ test("Addr.As4", func() { sinkIP4 = MustParseAddr("1.2.3.4").As4() })
+ test("Addr.Next", func() { sinkIP = MustParseAddr("1.2.3.4").Next() })
+ test("Addr.Prev", func() { sinkIP = MustParseAddr("1.2.3.4").Prev() })
+
+ // AddrPort constructors
+ test("AddrPortFrom", func() { sinkAddrPort = AddrPortFrom(IPv4(1, 2, 3, 4), 22) })
+ test("ParseAddrPort", func() { sinkAddrPort = panicIPP(ParseAddrPort("[::1]:1234")) })
+ test("MustParseAddrPort", func() { sinkAddrPort = MustParseAddrPort("[::1]:1234") })
+
+ // Prefix constructors
+ test("PrefixFrom", func() { sinkPrefix = PrefixFrom(IPv4(1, 2, 3, 4), 32) })
+ test("ParsePrefix/4", func() { sinkPrefix = panicPfx(ParsePrefix("1.2.3.4/20")) })
+ test("ParsePrefix/6", func() { sinkPrefix = panicPfx(ParsePrefix("fe80::1/64")) })
+ test("MustParsePrefix", func() { sinkPrefix = MustParsePrefix("1.2.3.4/20") })
+
+ // Prefix methods
+ test("Prefix.Contains", func() { sinkBool = MustParsePrefix("1.2.3.0/24").Contains(MustParseAddr("1.2.3.4")) })
+ test("Prefix.Overlaps", func() {
+ a, b := MustParsePrefix("1.2.3.0/24"), MustParsePrefix("1.2.0.0/16")
+ sinkBool = a.Overlaps(b)
+ })
+ test("Prefix.IsZero", func() { sinkBool = MustParsePrefix("1.2.0.0/16").IsZero() })
+ test("Prefix.IsSingleIP", func() { sinkBool = MustParsePrefix("1.2.3.4/32").IsSingleIP() })
+ test("Prefix.Masked", func() { sinkPrefix = MustParsePrefix("1.2.3.4/16").Masked() })
+}
+
+func TestAddrStringAllocs(t *testing.T) {
+ tests := []struct {
+ name string
+ ip Addr
+ wantAllocs int
+ }{
+ {"zero", Addr{}, 0},
+ {"ipv4", MustParseAddr("192.168.1.1"), 1},
+ {"ipv6", MustParseAddr("2001:db8::1"), 1},
+ {"ipv6+zone", MustParseAddr("2001:db8::1%eth0"), 1},
+ {"ipv4-in-ipv6", MustParseAddr("::ffff:192.168.1.1"), 1},
+ {"ipv4-in-ipv6+zone", MustParseAddr("::ffff:192.168.1.1%eth0"), 1},
+ }
+ optimizationOff := testenv.OptimizationOff()
+ for _, tc := range tests {
+ t.Run(tc.name, func(t *testing.T) {
+ if optimizationOff && strings.HasPrefix(tc.name, "ipv4-in-ipv6") {
+ // Optimizations are required to remove some allocs.
+ t.Skipf("skipping on %v", testenv.Builder())
+ }
+ allocs := int(testing.AllocsPerRun(1000, func() {
+ sinkString = tc.ip.String()
+ }))
+ if allocs != tc.wantAllocs {
+ t.Errorf("allocs=%d, want %d", allocs, tc.wantAllocs)
+ }
+ })
+ }
+}
+
+func TestPrefixString(t *testing.T) {
+ tests := []struct {
+ ipp Prefix
+ want string
+ }{
+ {Prefix{}, "invalid Prefix"},
+ {PrefixFrom(Addr{}, 8), "invalid Prefix"},
+ {PrefixFrom(MustParseAddr("1.2.3.4"), 88), "invalid Prefix"},
+ }
+
+ for _, tt := range tests {
+ if got := tt.ipp.String(); got != tt.want {
+ t.Errorf("(%#v).String() = %q want %q", tt.ipp, got, tt.want)
+ }
+ }
+}
+
+func TestInvalidAddrPortString(t *testing.T) {
+ tests := []struct {
+ ipp AddrPort
+ want string
+ }{
+ {AddrPort{}, "invalid AddrPort"},
+ {AddrPortFrom(Addr{}, 80), "invalid AddrPort"},
+ }
+
+ for _, tt := range tests {
+ if got := tt.ipp.String(); got != tt.want {
+ t.Errorf("(%#v).String() = %q want %q", tt.ipp, got, tt.want)
+ }
+ }
+}
+
+func TestAsSlice(t *testing.T) {
+ tests := []struct {
+ in Addr
+ want []byte
+ }{
+ {in: Addr{}, want: nil},
+ {in: mustIP("1.2.3.4"), want: []byte{1, 2, 3, 4}},
+ {in: mustIP("ffff::1"), want: []byte{0xff, 0xff, 15: 1}},
+ }
+
+ for _, test := range tests {
+ got := test.in.AsSlice()
+ if !bytes.Equal(got, test.want) {
+ t.Errorf("%v.AsSlice() = %v want %v", test.in, got, test.want)
+ }
+ }
+}
+
+var sink16 [16]byte
+
+func BenchmarkAs16(b *testing.B) {
+ addr := MustParseAddr("1::10")
+ for i := 0; i < b.N; i++ {
+ sink16 = addr.As16()
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 01:09:50 +0000