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132 lines
2.8 KiB
132 lines
2.8 KiB
package net
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import (
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"net"
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)
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// Destination represents a network destination including address and protocol (tcp / udp).
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type Destination interface {
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Network() Network // Protocol of communication (tcp / udp)
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Address() Address // Address of destination
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Port() Port
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String() string // String representation of the destination
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NetAddr() string
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Equals(Destination) bool
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IsTCP() bool // True if destination is reachable via TCP
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IsUDP() bool // True if destination is reachable via UDP
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}
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func DestinationFromAddr(addr net.Addr) Destination {
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switch addr := addr.(type) {
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case *net.TCPAddr:
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return TCPDestination(IPAddress(addr.IP), Port(addr.Port))
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case *net.UDPAddr:
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return UDPDestination(IPAddress(addr.IP), Port(addr.Port))
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default:
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panic("Unknown address type.")
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}
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}
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// TCPDestination creates a TCP destination with given address
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func TCPDestination(address Address, port Port) Destination {
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return &tcpDestination{address: address, port: port}
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}
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// UDPDestination creates a UDP destination with given address
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func UDPDestination(address Address, port Port) Destination {
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return &udpDestination{address: address, port: port}
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}
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type tcpDestination struct {
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address Address
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port Port
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}
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func (dest *tcpDestination) Network() Network {
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return TCPNetwork
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}
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func (dest *tcpDestination) Address() Address {
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return dest.address
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}
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func (dest *tcpDestination) NetAddr() string {
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return dest.address.String() + ":" + dest.port.String()
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}
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func (dest *tcpDestination) String() string {
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return "tcp:" + dest.NetAddr()
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}
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func (dest *tcpDestination) IsTCP() bool {
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return true
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}
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func (dest *tcpDestination) IsUDP() bool {
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return false
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}
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func (dest *tcpDestination) Port() Port {
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return dest.port
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}
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func (dest *tcpDestination) Equals(another Destination) bool {
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if dest == nil && another == nil {
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return true
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}
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if dest == nil || another == nil {
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return false
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}
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if !another.IsTCP() {
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return false
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}
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return dest.Port() == another.Port() && dest.Address().Equals(another.Address())
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}
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type udpDestination struct {
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address Address
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port Port
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}
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func (dest *udpDestination) Network() Network {
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return UDPNetwork
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}
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func (dest *udpDestination) Address() Address {
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return dest.address
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}
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func (dest *udpDestination) NetAddr() string {
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return dest.address.String() + ":" + dest.port.String()
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}
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func (dest *udpDestination) String() string {
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return "udp:" + dest.NetAddr()
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}
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func (dest *udpDestination) IsTCP() bool {
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return false
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}
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func (dest *udpDestination) IsUDP() bool {
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return true
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}
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func (dest *udpDestination) Port() Port {
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return dest.port
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}
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func (dest *udpDestination) Equals(another Destination) bool {
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if dest == nil && another == nil {
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return true
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}
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if dest == nil || another == nil {
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return false
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}
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if !another.IsUDP() {
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return false
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}
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return dest.Port() == another.Port() && dest.Address().Equals(another.Address())
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}
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