| // 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, |
| }, |
| |
| // Prefer longer common prefixes, but only for IPv4 address |
| // pairs in the same special-purpose block. |
| { |
| in: []IPAddr{ |
| {IP: ParseIP("1.2.3.4")}, |
| {IP: ParseIP("10.55.0.1")}, |
| {IP: ParseIP("10.66.0.1")}, |
| }, |
| srcs: []IP{ |
| ParseIP("1.2.3.5"), |
| ParseIP("10.66.1.2"), |
| ParseIP("10.66.1.2"), |
| }, |
| want: []IPAddr{ |
| {IP: ParseIP("10.66.0.1")}, |
| {IP: ParseIP("10.55.0.1")}, |
| {IP: ParseIP("1.2.3.4")}, |
| }, |
| reverse: true, |
| }, |
| } |
| 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) |
| } |
| } |
| |
| } |
| |
| func mustParseCIDRs(t *testing.T, blocks ...string) []*IPNet { |
| res := make([]*IPNet, len(blocks)) |
| for i, block := range blocks { |
| var err error |
| _, res[i], err = ParseCIDR(block) |
| if err != nil { |
| t.Fatalf("ParseCIDR(%s) failed: %v", block, err) |
| } |
| } |
| return res |
| } |
| |
| func TestSameIPv4SpecialPurposeBlock(t *testing.T) { |
| blocks := mustParseCIDRs(t, |
| "10.0.0.0/8", |
| "127.0.0.0/8", |
| "169.254.0.0/16", |
| "172.16.0.0/12", |
| "192.168.0.0/16", |
| ) |
| |
| addrs := []struct { |
| ip IP |
| block int // index or -1 |
| }{ |
| {IP{1, 2, 3, 4}, -1}, |
| {IP{2, 3, 4, 5}, -1}, |
| {IP{10, 2, 3, 4}, 0}, |
| {IP{10, 6, 7, 8}, 0}, |
| {IP{127, 0, 0, 1}, 1}, |
| {IP{127, 255, 255, 255}, 1}, |
| {IP{169, 254, 77, 99}, 2}, |
| {IP{169, 254, 44, 22}, 2}, |
| {IP{169, 255, 0, 1}, -1}, |
| {IP{172, 15, 5, 6}, -1}, |
| {IP{172, 16, 32, 41}, 3}, |
| {IP{172, 31, 128, 9}, 3}, |
| {IP{172, 32, 88, 100}, -1}, |
| {IP{192, 168, 1, 1}, 4}, |
| {IP{192, 168, 128, 42}, 4}, |
| {IP{192, 169, 1, 1}, -1}, |
| } |
| |
| for i, addr := range addrs { |
| for j, block := range blocks { |
| got := block.Contains(addr.ip) |
| want := addr.block == j |
| if got != want { |
| t.Errorf("%d/%d. %s.Contains(%s): got %v, want %v", i, j, block, addr.ip, got, want) |
| } |
| } |
| } |
| |
| for i, addr1 := range addrs { |
| for j, addr2 := range addrs { |
| got := sameIPv4SpecialPurposeBlock(addr1.ip, addr2.ip) |
| want := addr1.block >= 0 && addr1.block == addr2.block |
| if got != want { |
| t.Errorf("%d/%d. sameIPv4SpecialPurposeBlock(%s, %s): got %v, want %v", i, j, addr1.ip, addr2.ip, got, want) |
| } |
| } |
| } |
| } |
