Xray-core/common/protocol/headers.go

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package protocol
import (
"runtime"
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"github.com/xtls/xray-core/common/bitmask"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/uuid"
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"golang.org/x/sys/cpu"
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)
// RequestCommand is a custom command in a proxy request.
type RequestCommand byte
const (
RequestCommandTCP = RequestCommand(0x01)
RequestCommandUDP = RequestCommand(0x02)
RequestCommandMux = RequestCommand(0x03)
)
func (c RequestCommand) TransferType() TransferType {
switch c {
case RequestCommandTCP, RequestCommandMux:
return TransferTypeStream
case RequestCommandUDP:
return TransferTypePacket
default:
return TransferTypeStream
}
}
const (
// [DEPRECATED 2023-06] RequestOptionChunkStream indicates request payload is chunked. Each chunk consists of length, authentication and payload.
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RequestOptionChunkStream bitmask.Byte = 0x01
// 0x02 legacy setting
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RequestOptionChunkMasking bitmask.Byte = 0x04
RequestOptionGlobalPadding bitmask.Byte = 0x08
RequestOptionAuthenticatedLength bitmask.Byte = 0x10
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)
type RequestHeader struct {
Version byte
Command RequestCommand
Option bitmask.Byte
Security SecurityType
Port net.Port
Address net.Address
User *MemoryUser
}
func (h *RequestHeader) Destination() net.Destination {
if h.Command == RequestCommandUDP {
return net.UDPDestination(h.Address, h.Port)
}
return net.TCPDestination(h.Address, h.Port)
}
const (
ResponseOptionConnectionReuse bitmask.Byte = 0x01
)
type ResponseCommand interface{}
type ResponseHeader struct {
Option bitmask.Byte
Command ResponseCommand
}
type CommandSwitchAccount struct {
Host net.Address
Port net.Port
ID uuid.UUID
Level uint32
ValidMin byte
}
var (
hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ
hasGCMAsmARM64 = cpu.ARM64.HasAES && cpu.ARM64.HasPMULL
// Keep in sync with crypto/aes/cipher_s390x.go.
hasGCMAsmS390X = cpu.S390X.HasAES && cpu.S390X.HasAESCBC && cpu.S390X.HasAESCTR &&
(cpu.S390X.HasGHASH || cpu.S390X.HasAESGCM)
hasAESGCMHardwareSupport = runtime.GOARCH == "amd64" && hasGCMAsmAMD64 ||
runtime.GOARCH == "arm64" && hasGCMAsmARM64 ||
runtime.GOARCH == "s390x" && hasGCMAsmS390X
)
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func (sc *SecurityConfig) GetSecurityType() SecurityType {
if sc == nil || sc.Type == SecurityType_AUTO {
if hasAESGCMHardwareSupport {
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return SecurityType_AES128_GCM
}
return SecurityType_CHACHA20_POLY1305
}
return sc.Type
}
func isDomainTooLong(domain string) bool {
return len(domain) > 256
}