Xray-core/transport/internet/kcp/config.go

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2020-11-25 11:01:53 +00:00
// +build !confonly
package kcp
import (
"crypto/cipher"
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"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/transport/internet"
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)
const protocolName = "mkcp"
// GetMTUValue returns the value of MTU settings.
func (c *Config) GetMTUValue() uint32 {
if c == nil || c.Mtu == nil {
return 1350
}
return c.Mtu.Value
}
// GetTTIValue returns the value of TTI settings.
func (c *Config) GetTTIValue() uint32 {
if c == nil || c.Tti == nil {
return 50
}
return c.Tti.Value
}
// GetUplinkCapacityValue returns the value of UplinkCapacity settings.
func (c *Config) GetUplinkCapacityValue() uint32 {
if c == nil || c.UplinkCapacity == nil {
return 5
}
return c.UplinkCapacity.Value
}
// GetDownlinkCapacityValue returns the value of DownlinkCapacity settings.
func (c *Config) GetDownlinkCapacityValue() uint32 {
if c == nil || c.DownlinkCapacity == nil {
return 20
}
return c.DownlinkCapacity.Value
}
// GetWriteBufferSize returns the size of WriterBuffer in bytes.
func (c *Config) GetWriteBufferSize() uint32 {
if c == nil || c.WriteBuffer == nil {
return 2 * 1024 * 1024
}
return c.WriteBuffer.Size
}
// GetReadBufferSize returns the size of ReadBuffer in bytes.
func (c *Config) GetReadBufferSize() uint32 {
if c == nil || c.ReadBuffer == nil {
return 2 * 1024 * 1024
}
return c.ReadBuffer.Size
}
// GetSecurity returns the security settings.
func (c *Config) GetSecurity() (cipher.AEAD, error) {
if c.Seed != nil {
return NewAEADAESGCMBasedOnSeed(c.Seed.Seed), nil
}
return NewSimpleAuthenticator(), nil
}
func (c *Config) GetPackerHeader() (internet.PacketHeader, error) {
if c.HeaderConfig != nil {
rawConfig, err := c.HeaderConfig.GetInstance()
if err != nil {
return nil, err
}
return internet.CreatePacketHeader(rawConfig)
}
return nil, nil
}
func (c *Config) GetSendingInFlightSize() uint32 {
size := c.GetUplinkCapacityValue() * 1024 * 1024 / c.GetMTUValue() / (1000 / c.GetTTIValue())
if size < 8 {
size = 8
}
return size
}
func (c *Config) GetSendingBufferSize() uint32 {
return c.GetWriteBufferSize() / c.GetMTUValue()
}
func (c *Config) GetReceivingInFlightSize() uint32 {
size := c.GetDownlinkCapacityValue() * 1024 * 1024 / c.GetMTUValue() / (1000 / c.GetTTIValue())
if size < 8 {
size = 8
}
return size
}
func (c *Config) GetReceivingBufferSize() uint32 {
return c.GetReadBufferSize() / c.GetMTUValue()
}
func init() {
common.Must(internet.RegisterProtocolConfigCreator(protocolName, func() interface{} {
return new(Config)
}))
}