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-rw-r--r--src/net/addrselect_test.go249
1 files changed, 249 insertions, 0 deletions
diff --git a/src/net/addrselect_test.go b/src/net/addrselect_test.go
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+++ b/src/net/addrselect_test.go
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+// Copyright 2015 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 darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package net
+
+import (
+ "reflect"
+ "testing"
+)
+
+func TestSortByRFC6724(t *testing.T) {
+ tests := []struct {
+ in []IPAddr
+ srcs []IP
+ want []IPAddr
+ reverse bool // also test it starting backwards
+ }{
+ // Examples from RFC 6724 section 10.2:
+
+ // Prefer matching scope.
+ {
+ in: []IPAddr{
+ {IP: ParseIP("2001:db8:1::1")},
+ {IP: ParseIP("198.51.100.121")},
+ },
+ srcs: []IP{
+ ParseIP("2001:db8:1::2"),
+ ParseIP("169.254.13.78"),
+ },
+ want: []IPAddr{
+ {IP: ParseIP("2001:db8:1::1")},
+ {IP: ParseIP("198.51.100.121")},
+ },
+ reverse: true,
+ },
+
+ // Prefer matching scope.
+ {
+ in: []IPAddr{
+ {IP: ParseIP("2001:db8:1::1")},
+ {IP: ParseIP("198.51.100.121")},
+ },
+ srcs: []IP{
+ ParseIP("fe80::1"),
+ ParseIP("198.51.100.117"),
+ },
+ want: []IPAddr{
+ {IP: ParseIP("198.51.100.121")},
+ {IP: ParseIP("2001:db8:1::1")},
+ },
+ reverse: true,
+ },
+
+ // Prefer higher precedence.
+ {
+ in: []IPAddr{
+ {IP: ParseIP("2001:db8:1::1")},
+ {IP: ParseIP("10.1.2.3")},
+ },
+ srcs: []IP{
+ ParseIP("2001:db8:1::2"),
+ ParseIP("10.1.2.4"),
+ },
+ want: []IPAddr{
+ {IP: ParseIP("2001:db8:1::1")},
+ {IP: ParseIP("10.1.2.3")},
+ },
+ reverse: true,
+ },
+
+ // Prefer smaller scope.
+ {
+ in: []IPAddr{
+ {IP: ParseIP("2001:db8:1::1")},
+ {IP: ParseIP("fe80::1")},
+ },
+ srcs: []IP{
+ ParseIP("2001:db8:1::2"),
+ ParseIP("fe80::2"),
+ },
+ want: []IPAddr{
+ {IP: ParseIP("fe80::1")},
+ {IP: ParseIP("2001:db8:1::1")},
+ },
+ reverse: true,
+ },
+
+ // Issue 13283. Having a 10/8 source address does not
+ // mean we should prefer 23/8 destination addresses.
+ {
+ in: []IPAddr{
+ {IP: ParseIP("54.83.193.112")},
+ {IP: ParseIP("184.72.238.214")},
+ {IP: ParseIP("23.23.172.185")},
+ {IP: ParseIP("75.101.148.21")},
+ {IP: ParseIP("23.23.134.56")},
+ {IP: ParseIP("23.21.50.150")},
+ },
+ srcs: []IP{
+ ParseIP("10.2.3.4"),
+ ParseIP("10.2.3.4"),
+ ParseIP("10.2.3.4"),
+ ParseIP("10.2.3.4"),
+ ParseIP("10.2.3.4"),
+ ParseIP("10.2.3.4"),
+ },
+ want: []IPAddr{
+ {IP: ParseIP("54.83.193.112")},
+ {IP: ParseIP("184.72.238.214")},
+ {IP: ParseIP("23.23.172.185")},
+ {IP: ParseIP("75.101.148.21")},
+ {IP: ParseIP("23.23.134.56")},
+ {IP: ParseIP("23.21.50.150")},
+ },
+ reverse: false,
+ },
+ }
+ for i, tt := range tests {
+ inCopy := make([]IPAddr, len(tt.in))
+ copy(inCopy, tt.in)
+ srcCopy := make([]IP, len(tt.in))
+ copy(srcCopy, tt.srcs)
+ sortByRFC6724withSrcs(inCopy, srcCopy)
+ if !reflect.DeepEqual(inCopy, tt.want) {
+ t.Errorf("test %d:\nin = %s\ngot: %s\nwant: %s\n", i, tt.in, inCopy, tt.want)
+ }
+ if tt.reverse {
+ copy(inCopy, tt.in)
+ copy(srcCopy, tt.srcs)
+ for j := 0; j < len(inCopy)/2; j++ {
+ k := len(inCopy) - j - 1
+ inCopy[j], inCopy[k] = inCopy[k], inCopy[j]
+ srcCopy[j], srcCopy[k] = srcCopy[k], srcCopy[j]
+ }
+ sortByRFC6724withSrcs(inCopy, srcCopy)
+ if !reflect.DeepEqual(inCopy, tt.want) {
+ t.Errorf("test %d, starting backwards:\nin = %s\ngot: %s\nwant: %s\n", i, tt.in, inCopy, tt.want)
+ }
+ }
+
+ }
+
+}
+
+func TestRFC6724PolicyTableClassify(t *testing.T) {
+ tests := []struct {
+ ip IP
+ want policyTableEntry
+ }{
+ {
+ ip: ParseIP("127.0.0.1"),
+ want: policyTableEntry{
+ Prefix: &IPNet{IP: ParseIP("::ffff:0:0"), Mask: CIDRMask(96, 128)},
+ Precedence: 35,
+ Label: 4,
+ },
+ },
+ {
+ ip: ParseIP("2601:645:8002:a500:986f:1db8:c836:bd65"),
+ want: policyTableEntry{
+ Prefix: &IPNet{IP: ParseIP("::"), Mask: CIDRMask(0, 128)},
+ Precedence: 40,
+ Label: 1,
+ },
+ },
+ {
+ ip: ParseIP("::1"),
+ want: policyTableEntry{
+ Prefix: &IPNet{IP: ParseIP("::1"), Mask: CIDRMask(128, 128)},
+ Precedence: 50,
+ Label: 0,
+ },
+ },
+ {
+ ip: ParseIP("2002::ab12"),
+ want: policyTableEntry{
+ Prefix: &IPNet{IP: ParseIP("2002::"), Mask: CIDRMask(16, 128)},
+ Precedence: 30,
+ Label: 2,
+ },
+ },
+ }
+ for i, tt := range tests {
+ got := rfc6724policyTable.Classify(tt.ip)
+ if !reflect.DeepEqual(got, tt.want) {
+ t.Errorf("%d. Classify(%s) = %v; want %v", i, tt.ip, got, tt.want)
+ }
+ }
+}
+
+func TestRFC6724ClassifyScope(t *testing.T) {
+ tests := []struct {
+ ip IP
+ want scope
+ }{
+ {ParseIP("127.0.0.1"), scopeLinkLocal}, // rfc6724#section-3.2
+ {ParseIP("::1"), scopeLinkLocal}, // rfc4007#section-4
+ {ParseIP("169.254.1.2"), scopeLinkLocal}, // rfc6724#section-3.2
+ {ParseIP("fec0::1"), scopeSiteLocal},
+ {ParseIP("8.8.8.8"), scopeGlobal},
+
+ {ParseIP("ff02::"), scopeLinkLocal}, // IPv6 multicast
+ {ParseIP("ff05::"), scopeSiteLocal}, // IPv6 multicast
+ {ParseIP("ff04::"), scopeAdminLocal}, // IPv6 multicast
+ {ParseIP("ff0e::"), scopeGlobal}, // IPv6 multicast
+
+ {IPv4(0xe0, 0, 0, 0), scopeGlobal}, // IPv4 link-local multicast as 16 bytes
+ {IPv4(0xe0, 2, 2, 2), scopeGlobal}, // IPv4 global multicast as 16 bytes
+ {IPv4(0xe0, 0, 0, 0).To4(), scopeGlobal}, // IPv4 link-local multicast as 4 bytes
+ {IPv4(0xe0, 2, 2, 2).To4(), scopeGlobal}, // IPv4 global multicast as 4 bytes
+ }
+ for i, tt := range tests {
+ got := classifyScope(tt.ip)
+ if got != tt.want {
+ t.Errorf("%d. classifyScope(%s) = %x; want %x", i, tt.ip, got, tt.want)
+ }
+ }
+}
+
+func TestRFC6724CommonPrefixLength(t *testing.T) {
+ tests := []struct {
+ a, b IP
+ want int
+ }{
+ {ParseIP("fe80::1"), ParseIP("fe80::2"), 64},
+ {ParseIP("fe81::1"), ParseIP("fe80::2"), 15},
+ {ParseIP("127.0.0.1"), ParseIP("fe80::1"), 0}, // diff size
+ {IPv4(1, 2, 3, 4), IP{1, 2, 3, 4}, 32},
+ {IP{1, 2, 255, 255}, IP{1, 2, 0, 0}, 16},
+ {IP{1, 2, 127, 255}, IP{1, 2, 0, 0}, 17},
+ {IP{1, 2, 63, 255}, IP{1, 2, 0, 0}, 18},
+ {IP{1, 2, 31, 255}, IP{1, 2, 0, 0}, 19},
+ {IP{1, 2, 15, 255}, IP{1, 2, 0, 0}, 20},
+ {IP{1, 2, 7, 255}, IP{1, 2, 0, 0}, 21},
+ {IP{1, 2, 3, 255}, IP{1, 2, 0, 0}, 22},
+ {IP{1, 2, 1, 255}, IP{1, 2, 0, 0}, 23},
+ {IP{1, 2, 0, 255}, IP{1, 2, 0, 0}, 24},
+ }
+ for i, tt := range tests {
+ got := commonPrefixLen(tt.a, tt.b)
+ if got != tt.want {
+ t.Errorf("%d. commonPrefixLen(%s, %s) = %d; want %d", i, tt.a, tt.b, got, tt.want)
+ }
+ }
+
+}
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