mirror of https://github.com/v2ray/v2ray-core
68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package net
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"strconv"
|
|
)
|
|
|
|
// Port represents a network port in TCP and UDP protocol.
|
|
type Port uint16
|
|
|
|
// PortFromBytes converts a byte array to a Port, assuming bytes are in big endian order.
|
|
// @unsafe Caller must ensure that the byte array has at least 2 elements.
|
|
func PortFromBytes(port []byte) Port {
|
|
return Port(binary.BigEndian.Uint16(port))
|
|
}
|
|
|
|
// PortFromInt converts an integer to a Port.
|
|
// @error when the integer is not positive or larger then 65535
|
|
func PortFromInt(val uint32) (Port, error) {
|
|
if val > 65535 {
|
|
return Port(0), newError("invalid port range: ", val)
|
|
}
|
|
return Port(val), nil
|
|
}
|
|
|
|
// PortFromString converts a string to a Port.
|
|
// @error when the string is not an integer or the integral value is a not a valid Port.
|
|
func PortFromString(s string) (Port, error) {
|
|
val, err := strconv.ParseUint(s, 10, 32)
|
|
if err != nil {
|
|
return Port(0), newError("invalid port range: ", s)
|
|
}
|
|
return PortFromInt(uint32(val))
|
|
}
|
|
|
|
// Value return the correspoding uint16 value of a Port.
|
|
func (p Port) Value() uint16 {
|
|
return uint16(p)
|
|
}
|
|
|
|
// String returns the string presentation of a Port.
|
|
func (p Port) String() string {
|
|
return strconv.Itoa(int(p))
|
|
}
|
|
|
|
// FromPort returns the beginning port of this PortRange.
|
|
func (p PortRange) FromPort() Port {
|
|
return Port(p.From)
|
|
}
|
|
|
|
// ToPort returns the end port of this PortRange.
|
|
func (p PortRange) ToPort() Port {
|
|
return Port(p.To)
|
|
}
|
|
|
|
// Contains returns true if the given port is within the range of a PortRange.
|
|
func (p PortRange) Contains(port Port) bool {
|
|
return p.FromPort() <= port && port <= p.ToPort()
|
|
}
|
|
|
|
// SinglePortRange returns a PortRange contains a single port.
|
|
func SinglePortRange(p Port) *PortRange {
|
|
return &PortRange{
|
|
From: uint32(p),
|
|
To: uint32(p),
|
|
}
|
|
}
|