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9d9c1486fa
The code in this package is all snapshot from the Go codebase in older versions, inlined here to allow OpenTofu's cidr-calculation-related functions to preserve their original behavior despite upstream changing the parsing rules in a breaking way. This code is intentionally modified as little as possible from the upstream code it was derived from. We are imposing on ourselves considerably stricter style conventions than the Go project follows and so we need to disable various linters for this package to allow this code to remain written in the Go idiomatic style, rather than in OpenTofu's stricter local style. In particular, we've chosen to prohibit ourselves from using named return values or package-global variables, despite those both being typical in the standard library and in other codebases. Signed-off-by: Martin Atkins <mart@degeneration.co.uk>
126 lines
6.2 KiB
Go
126 lines
6.2 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//nolint:gochecknoglobals,gocritic,govet // This file is copied from the Go codebase and intended to remain close to the original in case we need to backport changes.
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package ipaddr
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import (
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stdnet "net"
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"reflect"
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"testing"
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)
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// Lean on the standard net lib as much as possible.
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type IPMask = stdnet.IPMask
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var IPv4Mask = stdnet.IPv4Mask
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var parseIPTests = []struct {
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in string
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out IP
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}{
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{"127.0.1.2", IPv4(127, 0, 1, 2)},
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{"127.0.0.1", IPv4(127, 0, 0, 1)},
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{"127.001.002.003", IPv4(127, 1, 2, 3)},
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{"127.007.008.009", IPv4(127, 7, 8, 9)},
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{"127.010.020.030", IPv4(127, 10, 20, 30)},
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{"::ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
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{"::ffff:127.001.002.003", IPv4(127, 1, 2, 3)},
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{"::ffff:127.007.008.009", IPv4(127, 7, 8, 9)},
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{"::ffff:127.010.020.030", IPv4(127, 10, 20, 30)},
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{"::ffff:7f01:0203", IPv4(127, 1, 2, 3)},
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{"0:0:0:0:0000:ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
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{"0:0:0:0:000000:ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
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{"0:0:0:0::ffff:127.1.2.3", IPv4(127, 1, 2, 3)},
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{"2001:4860:0:2001::68", IP{0x20, 0x01, 0x48, 0x60, 0, 0, 0x20, 0x01, 0, 0, 0, 0, 0, 0, 0x00, 0x68}},
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{"2001:4860:0000:2001:0000:0000:0000:0068", IP{0x20, 0x01, 0x48, 0x60, 0, 0, 0x20, 0x01, 0, 0, 0, 0, 0, 0, 0x00, 0x68}},
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{"-0.0.0.0", nil},
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{"0.-1.0.0", nil},
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{"0.0.-2.0", nil},
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{"0.0.0.-3", nil},
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{"127.0.0.256", nil},
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{"abc", nil},
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{"123:", nil},
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{"fe80::1%lo0", nil},
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{"fe80::1%911", nil},
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{"", nil},
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{"a1:a2:a3:a4::b1:b2:b3:b4", nil}, // Issue 6628
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//
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// NOTE: These correct failures were added for go-1.17, but are a
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// backwards-incompatible change for OpenTofu users, who might have
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// already written modules using leading zeroes.
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//
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//{"127.001.002.003", nil},
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//{"::ffff:127.001.002.003", nil},
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//{"123.000.000.000", nil},
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//{"1.2..4", nil},
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//{"0123.0.0.1", nil},
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}
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func TestParseIP(t *testing.T) {
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for _, tt := range parseIPTests {
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if out := ParseIP(tt.in); !reflect.DeepEqual(out, tt.out) {
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t.Errorf("ParseIP(%q) = %v, want %v", tt.in, out, tt.out)
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}
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}
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}
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var parseCIDRTests = []struct {
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in string
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ip IP
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net *IPNet
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err error
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}{
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{"135.104.0.0/32", IPv4(135, 104, 0, 0), &IPNet{IP: IPv4(135, 104, 0, 0), Mask: IPv4Mask(255, 255, 255, 255)}, nil},
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{"0.0.0.0/24", IPv4(0, 0, 0, 0), &IPNet{IP: IPv4(0, 0, 0, 0), Mask: IPv4Mask(255, 255, 255, 0)}, nil},
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{"135.104.0.0/24", IPv4(135, 104, 0, 0), &IPNet{IP: IPv4(135, 104, 0, 0), Mask: IPv4Mask(255, 255, 255, 0)}, nil},
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{"135.104.0.1/32", IPv4(135, 104, 0, 1), &IPNet{IP: IPv4(135, 104, 0, 1), Mask: IPv4Mask(255, 255, 255, 255)}, nil},
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{"135.104.0.1/24", IPv4(135, 104, 0, 1), &IPNet{IP: IPv4(135, 104, 0, 0), Mask: IPv4Mask(255, 255, 255, 0)}, nil},
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{"127.000.000.001/32", IPv4(127, 0, 0, 1), &IPNet{IP: IPv4(127, 0, 0, 1), Mask: IPv4Mask(255, 255, 255, 255)}, nil},
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{"127.007.008.009/32", IPv4(127, 7, 8, 9), &IPNet{IP: IPv4(127, 7, 8, 9), Mask: IPv4Mask(255, 255, 255, 255)}, nil},
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{"127.010.020.030/32", IPv4(127, 10, 20, 30), &IPNet{IP: IPv4(127, 10, 20, 30), Mask: IPv4Mask(255, 255, 255, 255)}, nil},
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{"::1/128", ParseIP("::1"), &IPNet{IP: ParseIP("::1"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"))}, nil},
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{"abcd:2345::/127", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe"))}, nil},
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{"abcd:2345::/65", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff:8000::"))}, nil},
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{"abcd:2345::/64", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:ffff::"))}, nil},
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{"abcd:2345::/63", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:ffff:fffe::"))}, nil},
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{"abcd:2345::/33", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff:8000::"))}, nil},
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{"abcd:2345::/32", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2345::"), Mask: IPMask(ParseIP("ffff:ffff::"))}, nil},
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{"abcd:2344::/31", ParseIP("abcd:2344::"), &IPNet{IP: ParseIP("abcd:2344::"), Mask: IPMask(ParseIP("ffff:fffe::"))}, nil},
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{"abcd:2300::/24", ParseIP("abcd:2300::"), &IPNet{IP: ParseIP("abcd:2300::"), Mask: IPMask(ParseIP("ffff:ff00::"))}, nil},
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{"abcd:2345::/24", ParseIP("abcd:2345::"), &IPNet{IP: ParseIP("abcd:2300::"), Mask: IPMask(ParseIP("ffff:ff00::"))}, nil},
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{"2001:DB8::/48", ParseIP("2001:DB8::"), &IPNet{IP: ParseIP("2001:DB8::"), Mask: IPMask(ParseIP("ffff:ffff:ffff::"))}, nil},
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{"2001:DB8::1/48", ParseIP("2001:DB8::1"), &IPNet{IP: ParseIP("2001:DB8::"), Mask: IPMask(ParseIP("ffff:ffff:ffff::"))}, nil},
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{"192.168.1.1/255.255.255.0", nil, nil, &ParseError{Type: "CIDR address", Text: "192.168.1.1/255.255.255.0"}},
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{"192.168.1.1/35", nil, nil, &ParseError{Type: "CIDR address", Text: "192.168.1.1/35"}},
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{"2001:db8::1/-1", nil, nil, &ParseError{Type: "CIDR address", Text: "2001:db8::1/-1"}},
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{"2001:db8::1/-0", nil, nil, &ParseError{Type: "CIDR address", Text: "2001:db8::1/-0"}},
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{"-0.0.0.0/32", nil, nil, &ParseError{Type: "CIDR address", Text: "-0.0.0.0/32"}},
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{"0.-1.0.0/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.-1.0.0/32"}},
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{"0.0.-2.0/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.-2.0/32"}},
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{"0.0.0.-3/32", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.0.-3/32"}},
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{"0.0.0.0/-0", nil, nil, &ParseError{Type: "CIDR address", Text: "0.0.0.0/-0"}},
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//
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// NOTE: This correct failure was added for go-1.17, but is a
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// backwards-incompatible change for OpenTofu users, who might have
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// already written modules using leading zeroes.
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//
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//{"127.000.000.001/32", nil, nil, &ParseError{Type: "CIDR address", Text: "127.000.000.001/32"}},
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{"", nil, nil, &ParseError{Type: "CIDR address", Text: ""}},
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}
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func TestParseCIDR(t *testing.T) {
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for _, tt := range parseCIDRTests {
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ip, net, err := ParseCIDR(tt.in)
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if !reflect.DeepEqual(err, tt.err) {
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t.Errorf("ParseCIDR(%q) = %v, %v; want %v, %v", tt.in, ip, net, tt.ip, tt.net)
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}
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if err == nil && (!tt.ip.Equal(ip) || !tt.net.IP.Equal(net.IP) || !reflect.DeepEqual(net.Mask, tt.net.Mask)) {
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t.Errorf("ParseCIDR(%q) = %v, {%v, %v}; want %v, {%v, %v}", tt.in, ip, net.IP, net.Mask, tt.ip, tt.net.IP, tt.net.Mask)
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}
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}
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}
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