common.Must2

common/common.go

@@ -10,3 +10,9 @@ func Must(err error) {
 		panic(err)
 	}
 }
+
+func Must2(v interface{}, err error) {
+	if err != nil {
+		panic(err)
+	}
+}

proxy/shadowsocks/server.go

@@ -70,7 +70,7 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn internet
 	}
 }
 
-func (v *Server) handlerUDPPayload(ctx context.Context, conn internet.Connection, dispatcher dispatcher.Interface) error {
+func (s *Server) handlerUDPPayload(ctx context.Context, conn internet.Connection, dispatcher dispatcher.Interface) error {
 	udpServer := udp.NewDispatcher(dispatcher)
 
 	reader := buf.NewReader(conn)
@@ -81,7 +81,7 @@ func (v *Server) handlerUDPPayload(ctx context.Context, conn internet.Connection
 		}
 
 		for _, payload := range mpayload {
-			request, data, err := DecodeUDPPacket(v.user, payload)
+			request, data, err := DecodeUDPPacket(s.user, payload)
 			if err != nil {
 				if source, ok := proxy.SourceFromContext(ctx); ok {
 					log.Trace(newError("dropping invalid UDP packet from: ", source).Base(err))
@@ -91,13 +91,13 @@ func (v *Server) handlerUDPPayload(ctx context.Context, conn internet.Connection
 				continue
 			}
 
-			if request.Option.Has(RequestOptionOneTimeAuth) && v.account.OneTimeAuth == Account_Disabled {
+			if request.Option.Has(RequestOptionOneTimeAuth) && s.account.OneTimeAuth == Account_Disabled {
 				log.Trace(newError("client payload enables OTA but server doesn't allow it"))
 				payload.Release()
 				continue
 			}
 
-			if !request.Option.Has(RequestOptionOneTimeAuth) && v.account.OneTimeAuth == Account_Enabled {
+			if !request.Option.Has(RequestOptionOneTimeAuth) && s.account.OneTimeAuth == Account_Enabled {
 				log.Trace(newError("client payload disables OTA but server forces it"))
 				payload.Release()
 				continue

proxy/vmess/account.go

@@ -13,24 +13,24 @@ type InternalAccount struct {
 	Security protocol.Security
 }
 
-func (v *InternalAccount) AnyValidID() *protocol.ID {
-	if len(v.AlterIDs) == 0 {
-		return v.ID
+func (a *InternalAccount) AnyValidID() *protocol.ID {
+	if len(a.AlterIDs) == 0 {
+		return a.ID
 	}
-	return v.AlterIDs[dice.Roll(len(v.AlterIDs))]
+	return a.AlterIDs[dice.Roll(len(a.AlterIDs))]
 }
 
-func (v *InternalAccount) Equals(account protocol.Account) bool {
+func (a *InternalAccount) Equals(account protocol.Account) bool {
 	vmessAccount, ok := account.(*InternalAccount)
 	if !ok {
 		return false
 	}
 	// TODO: handle AlterIds difference
-	return v.ID.Equals(vmessAccount.ID)
+	return a.ID.Equals(vmessAccount.ID)
 }
 
-func (v *Account) AsAccount() (protocol.Account, error) {
-	id, err := uuid.ParseString(v.Id)
+func (a *Account) AsAccount() (protocol.Account, error) {
+	id, err := uuid.ParseString(a.Id)
 	if err != nil {
 		log.Trace(newError("failed to parse ID").Base(err).AtError())
 		return nil, err
@@ -38,7 +38,7 @@ func (v *Account) AsAccount() (protocol.Account, error) {
 	protoID := protocol.NewID(id)
 	return &InternalAccount{
 		ID:       protoID,
-		AlterIDs: protocol.NewAlterIDs(protoID, uint16(v.AlterId)),
-		Security: v.SecuritySettings.AsSecurity(),
+		AlterIDs: protocol.NewAlterIDs(protoID, uint16(a.AlterId)),
+		Security: a.SecuritySettings.AsSecurity(),
 	}, nil
 }

proxy/vmess/encoding/auth.go

@@ -4,15 +4,16 @@ import (
 	"crypto/md5"
 	"hash/fnv"
 
-	"golang.org/x/crypto/sha3"
-
+	"v2ray.com/core/common"
 	"v2ray.com/core/common/serial"
+
+	"golang.org/x/crypto/sha3"
 )
 
 // Authenticate authenticates a byte array using Fnv hash.
 func Authenticate(b []byte) uint32 {
 	fnv1hash := fnv.New32a()
-	fnv1hash.Write(b)
+	common.Must2(fnv1hash.Write(b))
 	return fnv1hash.Sum32()
 }
 
@@ -81,7 +82,7 @@ type ShakeSizeParser struct {
 
 func NewShakeSizeParser(nonce []byte) *ShakeSizeParser {
 	shake := sha3.NewShake128()
-	shake.Write(nonce)
+	common.Must2(shake.Write(nonce))
 	return &ShakeSizeParser{
 		shake: shake,
 	}
@@ -92,7 +93,7 @@ func (*ShakeSizeParser) SizeBytes() int {
 }
 
 func (s *ShakeSizeParser) next() uint16 {
-	s.shake.Read(s.buffer[:])
+	common.Must2(s.shake.Read(s.buffer[:]))
 	return serial.BytesToUint16(s.buffer[:])
 }
 

proxy/vmess/encoding/client.go

@@ -11,6 +11,7 @@ import (
 	"golang.org/x/crypto/chacha20poly1305"
 
 	"v2ray.com/core/app/log"
+	"v2ray.com/core/common"
 	"v2ray.com/core/common/buf"
 	"v2ray.com/core/common/crypto"
 	"v2ray.com/core/common/dice"
@@ -43,7 +44,7 @@ type ClientSession struct {
 // NewClientSession creates a new ClientSession.
 func NewClientSession(idHash protocol.IDHash) *ClientSession {
 	randomBytes := make([]byte, 33) // 16 + 16 + 1
-	rand.Read(randomBytes)
+	common.Must2(rand.Read(randomBytes))
 
 	session := &ClientSession{}
 	session.requestBodyKey = randomBytes[:16]
@@ -58,22 +59,22 @@ func NewClientSession(idHash protocol.IDHash) *ClientSession {
 	return session
 }
 
-func (v *ClientSession) EncodeRequestHeader(header *protocol.RequestHeader, writer io.Writer) {
+func (c *ClientSession) EncodeRequestHeader(header *protocol.RequestHeader, writer io.Writer) {
 	timestamp := protocol.NewTimestampGenerator(protocol.NowTime(), 30)()
 	account, err := header.User.GetTypedAccount()
 	if err != nil {
 		log.Trace(newError("failed to get user account: ", err).AtError())
 		return
 	}
-	idHash := v.idHash(account.(*vmess.InternalAccount).AnyValidID().Bytes())
-	idHash.Write(timestamp.Bytes(nil))
-	writer.Write(idHash.Sum(nil))
+	idHash := c.idHash(account.(*vmess.InternalAccount).AnyValidID().Bytes())
+	common.Must2(idHash.Write(timestamp.Bytes(nil)))
+	common.Must2(writer.Write(idHash.Sum(nil)))
 
 	buffer := make([]byte, 0, 512)
 	buffer = append(buffer, Version)
-	buffer = append(buffer, v.requestBodyIV...)
-	buffer = append(buffer, v.requestBodyKey...)
-	buffer = append(buffer, v.responseHeader, byte(header.Option))
+	buffer = append(buffer, c.requestBodyIV...)
+	buffer = append(buffer, c.requestBodyKey...)
+	buffer = append(buffer, c.responseHeader, byte(header.Option))
 	padingLen := dice.Roll(16)
 	if header.Security.Is(protocol.SecurityType_LEGACY) {
 		// Disable padding in legacy mode for a smooth transition.
@@ -100,29 +101,27 @@ func (v *ClientSession) EncodeRequestHeader(header *protocol.RequestHeader, writ
 
 	if padingLen > 0 {
 		pading := make([]byte, padingLen)
-		rand.Read(pading)
+		common.Must2(rand.Read(pading))
 		buffer = append(buffer, pading...)
 	}
 
 	fnv1a := fnv.New32a()
-	fnv1a.Write(buffer)
+	common.Must2(fnv1a.Write(buffer))
 
 	buffer = fnv1a.Sum(buffer)
 
 	timestampHash := md5.New()
-	timestampHash.Write(hashTimestamp(timestamp))
+	common.Must2(timestampHash.Write(hashTimestamp(timestamp)))
 	iv := timestampHash.Sum(nil)
 	aesStream := crypto.NewAesEncryptionStream(account.(*vmess.InternalAccount).ID.CmdKey(), iv)
 	aesStream.XORKeyStream(buffer, buffer)
-	writer.Write(buffer)
-
-	return
+	common.Must2(writer.Write(buffer))
 }
 
-func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, writer io.Writer) buf.Writer {
+func (c *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, writer io.Writer) buf.Writer {
 	var sizeParser crypto.ChunkSizeEncoder = crypto.PlainChunkSizeParser{}
 	if request.Option.Has(protocol.RequestOptionChunkMasking) {
-		sizeParser = NewShakeSizeParser(v.requestBodyIV)
+		sizeParser = NewShakeSizeParser(c.requestBodyIV)
 	}
 	if request.Security.Is(protocol.SecurityType_NONE) {
 		if request.Option.Has(protocol.RequestOptionChunkStream) {
@@ -141,7 +140,7 @@ func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
 	}
 
 	if request.Security.Is(protocol.SecurityType_LEGACY) {
-		aesStream := crypto.NewAesEncryptionStream(v.requestBodyKey, v.requestBodyIV)
+		aesStream := crypto.NewAesEncryptionStream(c.requestBodyKey, c.requestBodyIV)
 		cryptionWriter := crypto.NewCryptionWriter(aesStream, writer)
 		if request.Option.Has(protocol.RequestOptionChunkStream) {
 			auth := &crypto.AEADAuthenticator{
@@ -156,13 +155,13 @@ func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
 	}
 
 	if request.Security.Is(protocol.SecurityType_AES128_GCM) {
-		block, _ := aes.NewCipher(v.requestBodyKey)
+		block, _ := aes.NewCipher(c.requestBodyKey)
 		aead, _ := cipher.NewGCM(block)
 
 		auth := &crypto.AEADAuthenticator{
 			AEAD: aead,
 			NonceGenerator: &ChunkNonceGenerator{
-				Nonce: append([]byte(nil), v.requestBodyIV...),
+				Nonce: append([]byte(nil), c.requestBodyIV...),
 				Size:  aead.NonceSize(),
 			},
 			AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
@@ -171,12 +170,12 @@ func (v *ClientSession) EncodeRequestBody(request *protocol.RequestHeader, write
 	}
 
 	if request.Security.Is(protocol.SecurityType_CHACHA20_POLY1305) {
-		aead, _ := chacha20poly1305.New(GenerateChacha20Poly1305Key(v.requestBodyKey))
+		aead, _ := chacha20poly1305.New(GenerateChacha20Poly1305Key(c.requestBodyKey))
 
 		auth := &crypto.AEADAuthenticator{
 			AEAD: aead,
 			NonceGenerator: &ChunkNonceGenerator{
-				Nonce: append([]byte(nil), v.requestBodyIV...),
+				Nonce: append([]byte(nil), c.requestBodyIV...),
 				Size:  aead.NonceSize(),
 			},
 			AdditionalDataGenerator: crypto.NoOpBytesGenerator{},
@@ -299,8 +298,8 @@ type ChunkNonceGenerator struct {
 	count uint16
 }
 
-func (v *ChunkNonceGenerator) Next() []byte {
-	serial.Uint16ToBytes(v.count, v.Nonce[:0])
-	v.count++
-	return v.Nonce[:v.Size]
+func (g *ChunkNonceGenerator) Next() []byte {
+	serial.Uint16ToBytes(g.count, g.Nonce[:0])
+	g.count++
+	return g.Nonce[:g.Size]
 }

proxy/vmess/encoding/commands.go

@@ -3,6 +3,7 @@ package encoding
 import (
 	"io"
 
+	"v2ray.com/core/common"
 	"v2ray.com/core/common/buf"
 	"v2ray.com/core/common/net"
 	"v2ray.com/core/common/protocol"
@@ -45,8 +46,8 @@ func MarshalCommand(command interface{}, writer io.Writer) error {
 		return ErrCommandTooLarge
 	}
 
-	writer.Write([]byte{cmdID, byte(len), byte(auth >> 24), byte(auth >> 16), byte(auth >> 8), byte(auth)})
-	writer.Write(buffer.Bytes())
+	common.Must2(writer.Write([]byte{cmdID, byte(len), byte(auth >> 24), byte(auth >> 16), byte(auth >> 8), byte(auth)}))
+	common.Must2(writer.Write(buffer.Bytes()))
 	return nil
 }
 
@@ -78,7 +79,7 @@ type CommandFactory interface {
 type CommandSwitchAccountFactory struct {
 }
 
-func (v *CommandSwitchAccountFactory) Marshal(command interface{}, writer io.Writer) error {
+func (f *CommandSwitchAccountFactory) Marshal(command interface{}, writer io.Writer) error {
 	cmd, ok := command.(*protocol.CommandSwitchAccount)
 	if !ok {
 		return ErrCommandTypeMismatch
@@ -88,25 +89,25 @@ func (v *CommandSwitchAccountFactory) Marshal(command interface{}, writer io.Wri
 	if cmd.Host != nil {
 		hostStr = cmd.Host.String()
 	}
-	writer.Write([]byte{byte(len(hostStr))})
+	common.Must2(writer.Write([]byte{byte(len(hostStr))}))
 
 	if len(hostStr) > 0 {
-		writer.Write([]byte(hostStr))
+		common.Must2(writer.Write([]byte(hostStr)))
 	}
 
-	writer.Write(cmd.Port.Bytes(nil))
+	common.Must2(writer.Write(cmd.Port.Bytes(nil)))
 
 	idBytes := cmd.ID.Bytes()
-	writer.Write(idBytes)
+	common.Must2(writer.Write(idBytes))
 
-	writer.Write(serial.Uint16ToBytes(cmd.AlterIds, nil))
-	writer.Write([]byte{byte(cmd.Level)})
+	common.Must2(writer.Write(serial.Uint16ToBytes(cmd.AlterIds, nil)))
+	common.Must2(writer.Write([]byte{byte(cmd.Level)}))
 
-	writer.Write([]byte{cmd.ValidMin})
+	common.Must2(writer.Write([]byte{cmd.ValidMin}))
 	return nil
 }
 
-func (v *CommandSwitchAccountFactory) Unmarshal(data []byte) (interface{}, error) {
+func (f *CommandSwitchAccountFactory) Unmarshal(data []byte) (interface{}, error) {
 	cmd := new(protocol.CommandSwitchAccount)
 	if len(data) == 0 {
 		return nil, newError("insufficient length.")

proxy/vmess/encoding/server.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"golang.org/x/crypto/chacha20poly1305"
+	"v2ray.com/core/common"
 	"v2ray.com/core/common/buf"
 	"v2ray.com/core/common/crypto"
 	"v2ray.com/core/common/net"
@@ -126,7 +127,7 @@ func (s *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 	}
 
 	timestampHash := md5.New()
-	timestampHash.Write(hashTimestamp(timestamp))
+	common.Must2(timestampHash.Write(hashTimestamp(timestamp)))
 	iv := timestampHash.Sum(nil)
 	account, err := user.GetTypedAccount()
 	if err != nil {
@@ -220,7 +221,7 @@ func (s *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 	}
 
 	fnv1a := fnv.New32a()
-	fnv1a.Write(buffer[:bufferLen])
+	common.Must2(fnv1a.Write(buffer[:bufferLen]))
 	actualHash := fnv1a.Sum32()
 	expectedHash := serial.BytesToUint32(buffer[bufferLen : bufferLen+4])
 
@@ -314,10 +315,10 @@ func (s *ServerSession) EncodeResponseHeader(header *protocol.ResponseHeader, wr
 	encryptionWriter := crypto.NewCryptionWriter(aesStream, writer)
 	s.responseWriter = encryptionWriter
 
-	encryptionWriter.Write([]byte{s.responseHeader, byte(header.Option)})
+	common.Must2(encryptionWriter.Write([]byte{s.responseHeader, byte(header.Option)}))
 	err := MarshalCommand(header.Command, encryptionWriter)
 	if err != nil {
-		encryptionWriter.Write([]byte{0x00, 0x00})
+		common.Must2(encryptionWriter.Write([]byte{0x00, 0x00}))
 	}
 }
 

proxy/vmess/inbound/inbound.go

@@ -132,7 +132,7 @@ func transferRequest(timer signal.ActivityTimer, session *encoding.ServerSession
 
 	bodyReader := session.DecodeRequestBody(request, input)
 	if err := buf.Copy(bodyReader, output, buf.UpdateActivity(timer)); err != nil {
-		return err
+		return newError("failed to transfer request").Base(err)
 	}
 	return nil
 }

proxy/vmess/outbound/command.go

@@ -9,7 +9,7 @@ import (
 	"v2ray.com/core/proxy/vmess"
 )
 
-func (v *Handler) handleSwitchAccount(cmd *protocol.CommandSwitchAccount) {
+func (h *Handler) handleSwitchAccount(cmd *protocol.CommandSwitchAccount) {
 	account := &vmess.Account{
 		Id:      cmd.ID.String(),
 		AlterId: uint32(cmd.AlterIds),
@@ -25,16 +25,16 @@ func (v *Handler) handleSwitchAccount(cmd *protocol.CommandSwitchAccount) {
 	}
 	dest := net.TCPDestination(cmd.Host, cmd.Port)
 	until := time.Now().Add(time.Duration(cmd.ValidMin) * time.Minute)
-	v.serverList.AddServer(protocol.NewServerSpec(dest, protocol.BeforeTime(until), user))
+	h.serverList.AddServer(protocol.NewServerSpec(dest, protocol.BeforeTime(until), user))
 }
 
-func (v *Handler) handleCommand(dest net.Destination, cmd protocol.ResponseCommand) {
+func (h *Handler) handleCommand(dest net.Destination, cmd protocol.ResponseCommand) {
 	switch typedCommand := cmd.(type) {
 	case *protocol.CommandSwitchAccount:
 		if typedCommand.Host == nil {
 			typedCommand.Host = dest.Address
 		}
-		v.handleSwitchAccount(typedCommand)
+		h.handleSwitchAccount(typedCommand)
 	default:
 	}
 }

proxy/vmess/vmess.go

@@ -12,6 +12,7 @@ import (
 	"sync"
 	"time"
 
+	"v2ray.com/core/common"
 	"v2ray.com/core/common/protocol"
 )
 
@@ -60,11 +61,11 @@ func (v *TimedUserValidator) generateNewHashes(nowSec protocol.Timestamp, idx in
 	var hashValueRemoval [16]byte
 	idHash := v.hasher(entry.id.Bytes())
 	for entry.lastSec <= nowSec {
-		idHash.Write(entry.lastSec.Bytes(nil))
+		common.Must2(idHash.Write(entry.lastSec.Bytes(nil)))
 		idHash.Sum(hashValue[:0])
 		idHash.Reset()
 
-		idHash.Write(entry.lastSecRemoval.Bytes(nil))
+		common.Must2(idHash.Write(entry.lastSecRemoval.Bytes(nil)))
 		idHash.Sum(hashValueRemoval[:0])
 		idHash.Reset()
 

transport/internet/kcp/connection.go

@@ -214,7 +214,7 @@ func NewConnection(conv uint16, sysConn SystemConnection, config *Config) *Conne
 		dataInput:  make(chan bool, 1),
 		dataOutput: make(chan bool, 1),
 		Config:     config,
-		output:     NewSegmentWriter(sysConn),
+		output:     NewRetryableWriter(NewSegmentWriter(sysConn)),
 		mss:        config.GetMTUValue() - uint32(sysConn.Overhead()) - DataSegmentOverhead,
 		roundTrip: &RoundTripInfo{
 			rto:    100,

transport/internet/kcp/crypt.go

@@ -4,6 +4,7 @@ import (
 	"crypto/cipher"
 	"hash/fnv"
 
+	"v2ray.com/core/common"
 	"v2ray.com/core/common/serial"
 )
 
@@ -32,7 +33,7 @@ func (a *SimpleAuthenticator) Seal(dst, nonce, plain, extra []byte) []byte {
 	dst = append(dst, plain...)
 
 	fnvHash := fnv.New32a()
-	fnvHash.Write(dst[4:])
+	common.Must2(fnvHash.Write(dst[4:]))
 	fnvHash.Sum(dst[:0])
 
 	len := len(dst)
@@ -61,7 +62,7 @@ func (a *SimpleAuthenticator) Open(dst, nonce, cipherText, extra []byte) ([]byte
 	}
 
 	fnvHash := fnv.New32a()
-	fnvHash.Write(dst[4:])
+	common.Must2(fnvHash.Write(dst[4:]))
 	if serial.BytesToUint32(dst[:4]) != fnvHash.Sum32() {
 		return nil, newError("invalid auth")
 	}

transport/internet/kcp/output.go

@@ -4,6 +4,9 @@ import (
 	"io"
 	"sync"
 
+	"v2ray.com/core/common/retry"
+
+	"v2ray.com/core/common"
 	"v2ray.com/core/common/buf"
 )
 
@@ -24,11 +27,27 @@ func NewSegmentWriter(writer io.Writer) SegmentWriter {
 	}
 }
 
-func (v *SimpleSegmentWriter) Write(seg Segment) error {
-	v.Lock()
-	defer v.Unlock()
+func (w *SimpleSegmentWriter) Write(seg Segment) error {
+	w.Lock()
+	defer w.Unlock()
 
-	v.buffer.Reset(seg.Bytes())
-	_, err := v.writer.Write(v.buffer.Bytes())
+	common.Must(w.buffer.Reset(seg.Bytes()))
+	_, err := w.writer.Write(w.buffer.Bytes())
 	return err
 }
+
+type RetryableWriter struct {
+	writer SegmentWriter
+}
+
+func NewRetryableWriter(writer SegmentWriter) SegmentWriter {
+	return &RetryableWriter{
+		writer: writer,
+	}
+}
+
+func (w *RetryableWriter) Write(seg Segment) error {
+	return retry.Timed(5, 100).On(func() error {
+		return w.writer.Write(seg)
+	})
+}