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v2fly/common/net/address.go
2015-12-16 23:53:38 +01:00

149 lines
2.8 KiB
Go

package net
import (
"net"
"github.com/v2ray/v2ray-core/common/log"
)
// Address represents a network address to be communicated with. It may be an IP address or domain
// address, not both. This interface doesn't resolve IP address for a given domain.
type Address interface {
IP() net.IP // IP of this Address
Domain() string // Domain of this Address
IsIPv4() bool // True if this Address is an IPv4 address
IsIPv6() bool // True if this Address is an IPv6 address
IsDomain() bool // True if this Address is an domain address
String() string // String representation of this Address
}
func allZeros(data []byte) bool {
for _, v := range data {
if v != 0 {
return false
}
}
return true
}
// IPAddress creates an Address with given IP and port.
func IPAddress(ip []byte) Address {
switch len(ip) {
case net.IPv4len:
return &IPv4Address{
ip: [4]byte{ip[0], ip[1], ip[2], ip[3]},
}
case net.IPv6len:
if allZeros(ip[0:10]) && ip[10] == 0xff && ip[11] == 0xff {
return IPAddress(ip[12:16])
}
return &IPv6Address{
ip: [16]byte{
ip[0], ip[1], ip[2], ip[3],
ip[4], ip[5], ip[6], ip[7],
ip[8], ip[9], ip[10], ip[11],
ip[12], ip[13], ip[14], ip[15],
},
}
default:
log.Error("Invalid IP format: %v", ip)
return nil
}
}
// DomainAddress creates an Address with given domain and port.
func DomainAddress(domain string) Address {
return &DomainAddressImpl{
domain: domain,
}
}
type address struct {
}
type IPv4Address struct {
ip [4]byte
}
func (addr *IPv4Address) IP() net.IP {
return net.IP(addr.ip[:])
}
func (addr *IPv4Address) Domain() string {
panic("Calling Domain() on an IPv4Address.")
}
func (addr *IPv4Address) IsIPv4() bool {
return true
}
func (addr *IPv4Address) IsIPv6() bool {
return false
}
func (addr *IPv4Address) IsDomain() bool {
return false
}
func (this *IPv4Address) String() string {
return this.IP().String()
}
type IPv6Address struct {
ip [16]byte
}
func (addr *IPv6Address) IP() net.IP {
return net.IP(addr.ip[:])
}
func (addr *IPv6Address) Domain() string {
panic("Calling Domain() on an IPv6Address.")
}
func (addr *IPv6Address) IsIPv4() bool {
return false
}
func (addr *IPv6Address) IsIPv6() bool {
return true
}
func (addr *IPv6Address) IsDomain() bool {
return false
}
func (this *IPv6Address) String() string {
return "[" + this.IP().String() + "]"
}
type DomainAddressImpl struct {
domain string
}
func (addr *DomainAddressImpl) IP() net.IP {
panic("Calling IP() on a DomainAddress.")
}
func (addr *DomainAddressImpl) Domain() string {
return addr.domain
}
func (addr *DomainAddressImpl) IsIPv4() bool {
return false
}
func (addr *DomainAddressImpl) IsIPv6() bool {
return false
}
func (addr *DomainAddressImpl) IsDomain() bool {
return true
}
func (this *DomainAddressImpl) String() string {
return this.domain
}