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package dhcpv6
import (
"net"
"testing"
"github.com/stretchr/testify/require"
)
func TestOpt4RDNonMapRuleParse(t *testing.T) {
data := []byte{0x81, 0xaa, 0x05, 0xd4}
opt, err := ParseOpt4RDNonMapRule(data)
require.NoError(t, err)
require.True(t, opt.HubAndSpoke)
require.NotNil(t, opt.TrafficClass)
require.EqualValues(t, 0xaa, *opt.TrafficClass)
require.EqualValues(t, 1492, opt.DomainPMTU)
// Remove the TrafficClass flag and check value is ignored
data[0] = 0x80
opt, err = ParseOpt4RDNonMapRule(data)
require.NoError(t, err)
require.True(t, opt.HubAndSpoke)
require.Nil(t, opt.TrafficClass)
require.EqualValues(t, 1492, opt.DomainPMTU)
}
func TestOpt4RDNonMapRuleToBytes(t *testing.T) {
var tClass uint8 = 0xaa
opt := Opt4RDNonMapRule{
HubAndSpoke: true,
TrafficClass: &tClass,
DomainPMTU: 1492,
}
expected := []byte{0x81, 0xaa, 0x05, 0xd4}
require.Equal(t, expected, opt.ToBytes())
// Unsetting TrafficClass should zero the corresponding bytes in the output
opt.TrafficClass = nil
expected[0], expected[1] = 0x80, 0x00
require.Equal(t, expected, opt.ToBytes())
}
func TestOpt4RDNonMapRuleString(t *testing.T) {
var tClass uint8 = 120
opt := Opt4RDNonMapRule{
HubAndSpoke: true,
TrafficClass: &tClass,
DomainPMTU: 9000,
}
str := opt.String()
require.Contains(t, str, "HubAndSpoke=true",
"String() should contain the HubAndSpoke flag value")
require.Contains(t, str, "TrafficClass=120",
"String() should contain the TrafficClass flag value")
require.Contains(t, str, "DomainPMTU=9000",
"String() should contain the domain PMTU")
}
func TestOpt4RDMapRuleParse(t *testing.T) {
ip6addr, ip6net, err := net.ParseCIDR("2001:db8::1234:5678:0:aabb/64")
ip6net.IP = ip6addr // We want to keep the entire address however, not apply the mask
require.NoError(t, err)
ip4addr, ip4net, err := net.ParseCIDR("100.64.0.234/10")
ip4net.IP = ip4addr.To4()
require.NoError(t, err)
data := append([]byte{
10, // IPv4 prefix length
64, // IPv6 prefix length
32, // EA-bits
0x80, // WKPs authorized
},
append(ip4addr.To4(), ip6addr...)...,
)
opt, err := ParseOpt4RDMapRule(data)
require.NoError(t, err)
require.EqualValues(t, *ip6net, opt.Prefix6)
require.EqualValues(t, *ip4net, opt.Prefix4)
require.EqualValues(t, 32, opt.EABitsLength)
require.True(t, opt.WKPAuthorized)
}
func TestOpt4RDMapRuleToBytes(t *testing.T) {
opt := Opt4RDMapRule{
Prefix4: net.IPNet{
IP: net.IPv4(100, 64, 0, 238),
Mask: net.CIDRMask(24, 32),
},
Prefix6: net.IPNet{
IP: net.ParseIP("2001:db8::1234:5678:0:aabb"),
Mask: net.CIDRMask(80, 128),
},
EABitsLength: 32,
WKPAuthorized: true,
}
expected := append([]byte{
24, // v4 prefix length
80, // v6 prefix length
32, // EA-bits
0x80, // WKPs authorized
},
append(opt.Prefix4.IP.To4(), opt.Prefix6.IP.To16()...)...,
)
require.Equal(t, expected, opt.ToBytes())
}
// FIXME: Invalid packets are serialized without error
func TestOpt4RDMapRuleString(t *testing.T) {
opt := Opt4RDMapRule{
Prefix4: net.IPNet{
IP: net.IPv4(100, 64, 0, 238),
Mask: net.CIDRMask(24, 32),
},
Prefix6: net.IPNet{
IP: net.ParseIP("2001:db8::1234:5678:0:aabb"),
Mask: net.CIDRMask(80, 128),
},
EABitsLength: 32,
WKPAuthorized: true,
}
str := opt.String()
require.Contains(t, str, "WKPAuthorized=true", "String() should write the flag values")
require.Contains(t, str, "Prefix6=2001:db8::1234:5678:0:aabb/80",
"String() should include the IPv6 prefix")
require.Contains(t, str, "Prefix4=100.64.0.238/24",
"String() should include the IPv4 prefix")
require.Contains(t, str, "EA-Bits=32", "String() should include the value for EA-Bits")
}
// This test round-trip serialization/deserialization of both kinds of 4RD
// options, and the container option
func TestOpt4RDRoundTrip(t *testing.T) {
var tClass uint8 = 0xaa
opt := Opt4RD{
&Opt4RDMapRule{
Prefix4: net.IPNet{
IP: net.IPv4(100, 64, 0, 238).To4(),
Mask: net.CIDRMask(24, 32),
},
Prefix6: net.IPNet{
IP: net.ParseIP("2001:db8::1234:5678:0:aabb"),
Mask: net.CIDRMask(80, 128),
},
EABitsLength: 32,
WKPAuthorized: true,
},
&Opt4RDNonMapRule{
HubAndSpoke: true,
TrafficClass: &tClass,
DomainPMTU: 9000,
},
}
rtOpt, err := ParseOpt4RD(opt.ToBytes())
require.NoError(t, err)
require.NotNil(t, rtOpt)
require.Equal(t, opt, *rtOpt)
}
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