package kcp import ( "crypto/cipher" "github.com/xtls/xray-core/common" "github.com/xtls/xray-core/transport/internet" ) 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) })) }