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Rename quic session to connection 

Co-authored-by: 秋のかえで <autmaple@protonmail.com>
This commit is contained in:
yuhan6665 2022-04-09 00:48:02 -04:00
parent c6550aecfc
commit 393d211d1e
3 changed files with 83 additions and 83 deletions
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42
app/dns/nameserver_quic.go
View File

@ -37,7 +37,7 @@ type QUICNameServer struct {
reqID uint32
name string
destination *net.Destination
session quic.Session
connection quic.Connection
}
// NewQUICNameServer creates DNS-over-QUIC client object for local resolving
@ -194,7 +194,7 @@ func (s *QUICNameServer) sendQuery(ctx context.Context, domain string, clientIP
conn, err := s.openStream(dnsCtx)
if err != nil {
newError("failed to open quic session").Base(err).AtError().WriteToLog()
newError("failed to open quic connection").Base(err).AtError().WriteToLog()
return
}
@ -322,7 +322,7 @@ func (s *QUICNameServer) QueryIP(ctx context.Context, domain string, clientIP ne
}
}
func isActive(s quic.Session) bool {
func isActive(s quic.Connection) bool {
select {
case <-s.Context().Done():
return false
@ -331,17 +331,17 @@ func isActive(s quic.Session) bool {
}
}
func (s *QUICNameServer) getSession() (quic.Session, error) {
var session quic.Session
func (s *QUICNameServer) getConnection() (quic.Connection, error) {
var conn quic.Connection
s.RLock()
session = s.session
if session != nil && isActive(session) {
conn = s.connection
if conn != nil && isActive(conn) {
s.RUnlock()
return session, nil
return conn, nil
}
if session != nil {
// we're recreating the session, let's create a new one
_ = session.CloseWithError(0, "")
if conn != nil {
// we're recreating the connection, let's create a new one
_ = conn.CloseWithError(0, "")
}
s.RUnlock()
@ -349,42 +349,42 @@ func (s *QUICNameServer) getSession() (quic.Session, error) {
defer s.Unlock()
var err error
session, err = s.openSession()
conn, err = s.openConnection()
if err != nil {
// This does not look too nice, but QUIC (or maybe quic-go)
// doesn't seem stable enough.
// Maybe retransmissions aren't fully implemented in quic-go?
// Anyways, the simple solution is to make a second try when
// it fails to open the QUIC session.
session, err = s.openSession()
// it fails to open the QUIC connection.
conn, err = s.openConnection()
if err != nil {
return nil, err
}
}
s.session = session
return session, nil
s.connection = conn
return conn, nil
}
func (s *QUICNameServer) openSession() (quic.Session, error) {
func (s *QUICNameServer) openConnection() (quic.Connection, error) {
tlsConfig := tls.Config{}
quicConfig := &quic.Config{
HandshakeIdleTimeout: handshakeTimeout,
}
session, err := quic.DialAddrContext(context.Background(), s.destination.NetAddr(), tlsConfig.GetTLSConfig(tls.WithNextProto("http/1.1", http2.NextProtoTLS, NextProtoDQ)), quicConfig)
conn, err := quic.DialAddrContext(context.Background(), s.destination.NetAddr(), tlsConfig.GetTLSConfig(tls.WithNextProto("http/1.1", http2.NextProtoTLS, NextProtoDQ)), quicConfig)
if err != nil {
return nil, err
}
return session, nil
return conn, nil
}
func (s *QUICNameServer) openStream(ctx context.Context) (quic.Stream, error) {
session, err := s.getSession()
conn, err := s.getConnection()
if err != nil {
return nil, err
}
// open a new stream
return session.OpenStreamSync(ctx)
return conn.OpenStreamSync(ctx)
}

104
transport/internet/quic/dialer.go
View File

@ -15,39 +15,39 @@ import (
"github.com/xtls/xray-core/transport/internet/tls"
)
type sessionContext struct {
type connectionContext struct {
rawConn *sysConn
session quic.Session
conn quic.Connection
}
var errSessionClosed = newError("session closed")
var errConnectionClosed = newError("connection closed")
func (c *sessionContext) openStream(destAddr net.Addr) (*interConn, error) {
if !isActive(c.session) {
return nil, errSessionClosed
func (c *connectionContext) openStream(destAddr net.Addr) (*interConn, error) {
if !isActive(c.conn) {
return nil, errConnectionClosed
}
stream, err := c.session.OpenStream()
stream, err := c.conn.OpenStream()
if err != nil {
return nil, err
}
conn := &interConn{
stream: stream,
local: c.session.LocalAddr(),
local: c.conn.LocalAddr(),
remote: destAddr,
}
return conn, nil
}
type clientSessions struct {
type clientConnections struct {
access sync.Mutex
sessions map[net.Destination][]*sessionContext
conns map[net.Destination][]*connectionContext
cleanup *task.Periodic
}
func isActive(s quic.Session) bool {
func isActive(s quic.Connection) bool {
select {
case <-s.Context().Done():
return false
@ -56,81 +56,81 @@ func isActive(s quic.Session) bool {
}
}
func removeInactiveSessions(sessions []*sessionContext) []*sessionContext {
activeSessions := make([]*sessionContext, 0, len(sessions))
for i, s := range sessions {
if isActive(s.session) {
activeSessions = append(activeSessions, s)
func removeInactiveConnections(conns []*connectionContext) []*connectionContext {
activeConnections := make([]*connectionContext, 0, len(conns))
for i, s := range conns {
if isActive(s.conn) {
activeConnections = append(activeConnections, s)
continue
}
newError("closing quic session at index: ", i).WriteToLog()
if err := s.session.CloseWithError(0, ""); err != nil {
newError("failed to close session").Base(err).WriteToLog()
newError("closing quic connection at index: ", i).WriteToLog()
if err := s.conn.CloseWithError(0, ""); err != nil {
newError("failed to close connection").Base(err).WriteToLog()
}
if err := s.rawConn.Close(); err != nil {
newError("failed to close raw connection").Base(err).WriteToLog()
}
}
if len(activeSessions) < len(sessions) {
newError("active quic session reduced from ", len(sessions), " to ", len(activeSessions)).WriteToLog()
return activeSessions
if len(activeConnections) < len(conns) {
newError("active quic connection reduced from ", len(conns), " to ", len(activeConnections)).WriteToLog()
return activeConnections
}
return sessions
return conns
}
func (s *clientSessions) cleanSessions() error {
func (s *clientConnections) cleanConnections() error {
s.access.Lock()
defer s.access.Unlock()
if len(s.sessions) == 0 {
if len(s.conns) == 0 {
return nil
}
newSessionMap := make(map[net.Destination][]*sessionContext)
newConnMap := make(map[net.Destination][]*connectionContext)
for dest, sessions := range s.sessions {
sessions = removeInactiveSessions(sessions)
if len(sessions) > 0 {
newSessionMap[dest] = sessions
for dest, conns := range s.conns {
conns = removeInactiveConnections(conns)
if len(conns) > 0 {
newConnMap[dest] = conns
}
}
s.sessions = newSessionMap
s.conns = newConnMap
return nil
}
func (s *clientSessions) openConnection(ctx context.Context, destAddr net.Addr, config *Config, tlsConfig *tls.Config, sockopt *internet.SocketConfig) (stat.Connection, error) {
func (s *clientConnections) openConnection(ctx context.Context, destAddr net.Addr, config *Config, tlsConfig *tls.Config, sockopt *internet.SocketConfig) (stat.Connection, error) {
s.access.Lock()
defer s.access.Unlock()
if s.sessions == nil {
s.sessions = make(map[net.Destination][]*sessionContext)
if s.conns == nil {
s.conns = make(map[net.Destination][]*connectionContext)
}
dest := net.DestinationFromAddr(destAddr)
var sessions []*sessionContext
if s, found := s.sessions[dest]; found {
sessions = s
var conns []*connectionContext
if s, found := s.conns[dest]; found {
conns = s
}
if len(sessions) > 0 {
s := sessions[len(sessions)-1]
if isActive(s.session) {
if len(conns) > 0 {
s := conns[len(conns)-1]
if isActive(s.conn) {
conn, err := s.openStream(destAddr)
if err == nil {
return conn, nil
}
newError("failed to openStream: ").Base(err).WriteToLog()
} else {
newError("current quic session is not active!").WriteToLog()
newError("current quic connection is not active!").WriteToLog()
}
}
sessions = removeInactiveSessions(sessions)
conns = removeInactiveConnections(conns)
newError("dialing quic to ", dest).WriteToLog()
rawConn, err := internet.DialSystem(ctx, dest, sockopt)
if err != nil {
@ -146,33 +146,33 @@ func (s *clientSessions) openConnection(ctx context.Context, destAddr net.Addr,
if udpConn == nil {
udpConn = rawConn.(*internet.PacketConnWrapper).Conn.(*net.UDPConn)
}
conn, err := wrapSysConn(udpConn, config)
sysConn, err := wrapSysConn(udpConn, config)
if err != nil {
rawConn.Close()
return nil, err
}
session, err := quic.DialContext(context.Background(), conn, destAddr, "", tlsConfig.GetTLSConfig(tls.WithDestination(dest)), quicConfig)
conn, err := quic.DialContext(context.Background(), sysConn, destAddr, "", tlsConfig.GetTLSConfig(tls.WithDestination(dest)), quicConfig)
if err != nil {
conn.Close()
sysConn.Close()
return nil, err
}
context := &sessionContext{
session: session,
rawConn: conn,
context := &connectionContext{
conn: conn,
rawConn: sysConn,
}
s.sessions[dest] = append(sessions, context)
s.conns[dest] = append(conns, context)
return context.openStream(destAddr)
}
var client clientSessions
var client clientConnections
func init() {
client.sessions = make(map[net.Destination][]*sessionContext)
client.conns = make(map[net.Destination][]*connectionContext)
client.cleanup = &task.Periodic{
Interval: time.Minute,
Execute: client.cleanSessions,
Execute: client.cleanConnections,
}
common.Must(client.cleanup.Start())
}

16
transport/internet/quic/hub.go
View File

@ -22,17 +22,17 @@ type Listener struct {
addConn internet.ConnHandler
}
func (l *Listener) acceptStreams(session quic.Session) {
func (l *Listener) acceptStreams(conn quic.Connection) {
for {
stream, err := session.AcceptStream(context.Background())
stream, err := conn.AcceptStream(context.Background())
if err != nil {
newError("failed to accept stream").Base(err).WriteToLog()
select {
case <-session.Context().Done():
case <-conn.Context().Done():
return
case <-l.done.Wait():
if err := session.CloseWithError(0, ""); err != nil {
newError("failed to close session").Base(err).WriteToLog()
if err := conn.CloseWithError(0, ""); err != nil {
newError("failed to close connection").Base(err).WriteToLog()
}
return
default:
@ -43,8 +43,8 @@ func (l *Listener) acceptStreams(session quic.Session) {
conn := &interConn{
stream: stream,
local: session.LocalAddr(),
remote: session.RemoteAddr(),
local: conn.LocalAddr(),
remote: conn.RemoteAddr(),
}
l.addConn(conn)
@ -55,7 +55,7 @@ func (l *Listener) keepAccepting() {
for {
conn, err := l.listener.Accept(context.Background())
if err != nil {
newError("failed to accept QUIC sessions").Base(err).WriteToLog()
newError("failed to accept QUIC connection").Base(err).WriteToLog()
if l.done.Done() {
break
}