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https://github.com/apernet/hysteria.git
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45fbdec453
by setting StatusTCPOnly == 1, when a new version client connect to an old version server, the client will treat the server as udp disabled and will not submit a udp request or open a udp control stream. this make the upgrade much more smoothly even if we don't change the protocolVersion.
99 lines
1.9 KiB
Go
99 lines
1.9 KiB
Go
package core
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import (
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"time"
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)
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const (
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protocolVersion = uint8(3)
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protocolVersionV2 = uint8(2)
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protocolTimeout = 10 * time.Second
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closeErrorCodeGeneric = 0
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closeErrorCodeProtocol = 1
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closeErrorCodeAuth = 2
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)
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type transmissionRate struct {
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SendBPS uint64
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RecvBPS uint64
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}
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type clientHello struct {
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Rate transmissionRate
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AuthLen uint16 `struc:"sizeof=Auth"`
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Auth []byte
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}
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const (
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serverHelloStatusFailed = uint8(0)
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serverHelloStatusTCPOnly = uint8(1)
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serverHelloStatusOK = uint8(2)
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)
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type serverHello struct {
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Status uint8
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Rate transmissionRate
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MessageLen uint16 `struc:"sizeof=Message"`
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Message string
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}
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const (
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clientRequestTypeTCP = uint8(0)
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clientRequestTypeUDPLegacy = uint8(1)
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clientRequestTypeUDPControl = uint8(2)
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)
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type clientRequest struct {
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Type uint8
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HostLen uint16 `struc:"sizeof=Host"`
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Host string
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Port uint16
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}
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type serverResponse struct {
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OK bool
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UDPSessionID uint32
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MessageLen uint16 `struc:"sizeof=Message"`
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Message string
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}
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type udpMessage struct {
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SessionID uint32
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HostLen uint16 `struc:"sizeof=Host"`
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Host string
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Port uint16
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MsgID uint16 // doesn't matter when not fragmented, but must not be 0 when fragmented
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FragID uint8 // doesn't matter when not fragmented, starts at 0 when fragmented
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FragCount uint8 // must be 1 when not fragmented
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DataLen uint16 `struc:"sizeof=Data"`
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Data []byte
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}
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func (m udpMessage) HeaderSize() int {
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return 4 + 2 + len(m.Host) + 2 + 2 + 1 + 1 + 2
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}
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func (m udpMessage) Size() int {
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return m.HeaderSize() + len(m.Data)
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}
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type udpMessageV2 struct {
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SessionID uint32
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HostLen uint16 `struc:"sizeof=Host"`
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Host string
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Port uint16
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DataLen uint16 `struc:"sizeof=Data"`
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Data []byte
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}
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const (
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udpControlRequestOperationReleaseSession = uint8(1)
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)
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type udpControlRequest struct {
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SessionID uint32
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Operation uint8
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DataLen uint16 `struc:"sizeof=Data"`
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Data []byte
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}
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