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package net
import (
"net"
"strings"
)
// Destination represents a network destination including address and protocol (tcp / udp).
type Destination struct {
Address Address
Port Port
Network Network
}
// DestinationFromAddr generates a Destination from a net address.
func DestinationFromAddr(addr net.Addr) Destination {
switch addr := addr.(type) {
case *net.TCPAddr:
return TCPDestination(IPAddress(addr.IP), Port(addr.Port))
case *net.UDPAddr:
return UDPDestination(IPAddress(addr.IP), Port(addr.Port))
case *net.UnixAddr:
return UnixDestination(DomainAddress(addr.Name))
default:
panic("Net: Unknown address type.")
}
}
// ParseDestination converts a destination from its string presentation.
func ParseDestination(dest string) (Destination, error) {
d := Destination{
Address: AnyIP,
Port: Port(0),
}
switch {
case strings.HasPrefix(dest, "tcp:"):
d.Network = Network_TCP
dest = dest[4:]
case strings.HasPrefix(dest, "udp:"):
d.Network = Network_UDP
dest = dest[4:]
case strings.HasPrefix(dest, "unix:"):
d = UnixDestination(DomainAddress(dest[5:]))
return d, nil
}
hstr, pstr, err := SplitHostPort(dest)
if err != nil {
return d, err
}
if len(hstr) > 0 {
d.Address = ParseAddress(hstr)
}
if len(pstr) > 0 {
port, err := PortFromString(pstr)
if err != nil {
return d, err
}
d.Port = port
}
return d, nil
}
// TCPDestination creates a TCP destination with given address
func TCPDestination(address Address, port Port) Destination {
return Destination{
Network: Network_TCP,
Address: address,
Port: port,
}
}
// UDPDestination creates a UDP destination with given address
func UDPDestination(address Address, port Port) Destination {
return Destination{
Network: Network_UDP,
Address: address,
Port: port,
}
}
// UnixDestination creates a Unix destination with given address
func UnixDestination(address Address) Destination {
return Destination{
Network: Network_UNIX,
Address: address,
}
}
// NetAddr returns the network address in this Destination in string form.
func (d Destination) NetAddr() string {
addr := ""
if d.Network == Network_TCP || d.Network == Network_UDP {
addr = d.Address.String() + ":" + d.Port.String()
} else if d.Network == Network_UNIX {
addr = d.Address.String()
}
return addr
}
// String returns the strings form of this Destination.
func (d Destination) String() string {
prefix := "unknown:"
switch d.Network {
case Network_TCP:
prefix = "tcp:"
case Network_UDP:
prefix = "udp:"
case Network_UNIX:
prefix = "unix:"
}
return prefix + d.NetAddr()
}
// IsValid returns true if this Destination is valid.
func (d Destination) IsValid() bool {
return d.Network != Network_Unknown
}
// AsDestination converts current Endpoint into Destination.
func (p *Endpoint) AsDestination() Destination {
return Destination{
Network: p.Network,
Address: p.Address.AsAddress(),
Port: Port(p.Port),
}
}
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