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package util
import (
"encoding/hex"
"fmt"
"net"
)
// Address specifies how a peer is reachable on the network.
type Address struct {
Transport string // transport protocol
Options uint32 `order:"big"` // address options
Address []byte `size:"*"` // address data (protocol-dependent)
}
// NewAddress returns a new Address for the given transport and specs
func NewAddress(transport string, addr []byte) *Address {
a := &Address{
Transport: transport,
Options: 0,
Address: make([]byte, len(addr)),
}
copy(a.Address, addr)
return a
}
// String returns a human-readable representation of an address.
func (a *Address) String() string {
return fmt.Sprintf("Address{%s}", AddressString(a.Transport, a.Address))
}
//----------------------------------------------------------------------
// AddressString returns a string representaion of an address.
func AddressString(transport string, addr []byte) string {
if transport == "tcp" || transport == "udp" {
alen := len(addr)
port := uint(addr[alen-2])*256 + uint(addr[alen-1])
return fmt.Sprintf("%s:%s:%d", transport, net.IP(addr[:alen-2]).String(), port)
}
return fmt.Sprintf("%s:%s", transport, hex.EncodeToString(addr))
}
//----------------------------------------------------------------------
// IP address (can be IPv4 or IPv6 or a DNS name)
type IPAddress struct {
Host []byte `size:"*-2"`
Port uint16 `order:"big"`
}
// NewIPAddress creates a new instance for a given host and port.
func NewIPAddress(host []byte, port uint16) *IPAddress {
ip := &IPAddress{
Host: make([]byte, len(host)),
Port: port,
}
copy(ip.Host, host)
return ip
}
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