// 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 hurd 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) } } }