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addr.go
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addr.go
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// Copyright 2018 ETH Zurich
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package overlay
import (
"fmt"
"net"
"github.com/scionproto/scion/go/lib/addr"
)
type OverlayAddr struct {
l3 net.IP
l4 uint16
}
func NewOverlayAddr(l3 net.IP, l4 uint16) *OverlayAddr {
if l3.To4() != nil {
l3 = l3.To4()
}
return &OverlayAddr{l3: copyIP(l3), l4: l4}
}
func (a *OverlayAddr) L3() addr.HostAddr {
return addr.HostFromIP(a.l3)
}
func (a *OverlayAddr) L4() uint16 {
return a.l4
}
func (a *OverlayAddr) Type() Type {
if a.l3.To4() != nil {
return UDPIPv4
}
return UDPIPv6
}
func (a *OverlayAddr) Copy() *OverlayAddr {
if a == nil {
return nil
}
return &OverlayAddr{l3: copyIP(a.l3), l4: a.l4}
}
func (a *OverlayAddr) Equal(o *OverlayAddr) bool {
if (a == nil) || (o == nil) {
return a == o
}
if a.l3 != nil {
if !a.l3.Equal(o.l3) {
return false
}
} else if o.l3 != nil {
if !o.l3.Equal(a.l3) {
return false
}
}
return o.l4 == a.l4
}
func (a *OverlayAddr) Network() string {
return a.Type().String()
}
func (a *OverlayAddr) String() string {
if a == nil {
return "<nil>"
}
return fmt.Sprintf("[%s]:%d", a.l3, a.l4)
}
func (a *OverlayAddr) ToUDPAddr() *net.UDPAddr {
return &net.UDPAddr{IP: copyIP(a.l3), Port: int(a.l4)}
}
func copyIP(ip net.IP) net.IP {
return append(ip[:0:0], ip...)
}