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Copy pathpeer.go
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// Copyright 2015-2018 HenryLee. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tp
import (
"context"
"crypto/tls"
"fmt"
"net"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/henrylee2cn/teleport/quic"
"github.com/henrylee2cn/goutil"
"github.com/henrylee2cn/goutil/coarsetime"
"github.com/henrylee2cn/goutil/errors"
"github.com/henrylee2cn/teleport/codec"
)
type (
// BasePeer peer with the common method set
BasePeer interface {
// Close closes peer.
Close() (err error)
// CountSession returns the number of sessions.
CountSession() int
// GetSession gets the session by id.
GetSession(sessionID string) (Session, bool)
// RangeSession ranges all sessions. If fn returns false, stop traversing.
RangeSession(fn func(sess Session) bool)
// SetTLSConfig sets the TLS config.
SetTLSConfig(tlsConfig *tls.Config)
// SetTLSConfigFromFile sets the TLS config from file.
SetTLSConfigFromFile(tlsCertFile, tlsKeyFile string, insecureSkipVerifyForClient ...bool) error
// TLSConfig returns the TLS config.
TLSConfig() *tls.Config
// PluginContainer returns the global plugin container.
PluginContainer() *PluginContainer
}
// EarlyPeer the communication peer that has just been created
EarlyPeer interface {
BasePeer
// Router returns the root router of call or push handlers.
Router() *Router
// SubRoute adds handler group.
SubRoute(pathPrefix string, plugin ...Plugin) *SubRouter
// RouteCall registers CALL handlers, and returns the paths.
RouteCall(ctrlStruct interface{}, plugin ...Plugin) []string
// RouteCallFunc registers CALL handler, and returns the path.
RouteCallFunc(callHandleFunc interface{}, plugin ...Plugin) string
// RoutePush registers PUSH handlers, and returns the paths.
RoutePush(ctrlStruct interface{}, plugin ...Plugin) []string
// RoutePushFunc registers PUSH handler, and returns the path.
RoutePushFunc(pushHandleFunc interface{}, plugin ...Plugin) string
// SetUnknownCall sets the default handler, which is called when no handler for CALL is found.
SetUnknownCall(fn func(UnknownCallCtx) (interface{}, *Rerror), plugin ...Plugin)
// SetUnknownPush sets the default handler, which is called when no handler for PUSH is found.
SetUnknownPush(fn func(UnknownPushCtx) *Rerror, plugin ...Plugin)
}
// Peer the communication peer which is server or client role
Peer interface {
EarlyPeer
// ListenAndServe turns on the listening service.
ListenAndServe(protoFunc ...ProtoFunc) error
// Dial connects with the peer of the destination address.
Dial(addr string, protoFunc ...ProtoFunc) (Session, *Rerror)
// ServeConn serves the connection and returns a session.
// NOTE:
// Not support automatically redials after disconnection;
// Execute the PostAcceptPlugin plugins.
ServeConn(conn net.Conn, protoFunc ...ProtoFunc) (Session, error)
}
)
var (
_ BasePeer = new(peer)
_ EarlyPeer = new(peer)
_ Peer = new(peer)
)
type peer struct {
router *Router
pluginContainer *PluginContainer
sessHub *SessionHub
closeCh chan struct{}
// freeContext *handlerCtx
// ctxLock sync.Mutex
defaultSessionAge time.Duration // Default session max age, if less than or equal to 0, no time limit
defaultContextAge time.Duration // Default CALL or PUSH context max age, if less than or equal to 0, no time limit
tlsConfig *tls.Config
slowCometDuration time.Duration
defaultBodyCodec byte
printDetail bool
countTime bool
timeNow func() time.Time
timeSince func(time.Time) time.Duration
mu sync.Mutex
network string
// only for client role
defaultDialTimeout time.Duration
redialInterval time.Duration
redialTimes int32
localAddr net.Addr
// only for server role
listenAddr string
listeners map[net.Listener]struct{}
}
// NewPeer creates a new peer.
func NewPeer(cfg PeerConfig, globalLeftPlugin ...Plugin) Peer {
doPrintPid()
pluginContainer := newPluginContainer()
pluginContainer.AppendLeft(globalLeftPlugin...)
pluginContainer.preNewPeer(&cfg)
if err := cfg.check(); err != nil {
Fatalf("%v", err)
}
var p = &peer{
router: newRouter("", pluginContainer),
pluginContainer: pluginContainer,
sessHub: newSessionHub(),
defaultSessionAge: cfg.DefaultSessionAge,
defaultContextAge: cfg.DefaultContextAge,
closeCh: make(chan struct{}),
slowCometDuration: cfg.slowCometDuration,
defaultDialTimeout: cfg.DefaultDialTimeout,
redialInterval: cfg.RedialInterval,
network: cfg.Network,
listenAddr: cfg.listenAddrStr,
localAddr: cfg.localAddr,
printDetail: cfg.PrintDetail,
countTime: cfg.CountTime,
redialTimes: cfg.RedialTimes,
listeners: make(map[net.Listener]struct{}),
}
if c, err := codec.GetByName(cfg.DefaultBodyCodec); err != nil {
Fatalf("%v", err)
} else {
p.defaultBodyCodec = c.ID()
}
if p.countTime {
p.timeNow = time.Now
p.timeSince = time.Since
} else {
t0 := time.Time{}
p.timeNow = func() time.Time { return t0 }
p.timeSince = func(time.Time) time.Duration { return 0 }
}
addPeer(p)
p.pluginContainer.postNewPeer(p)
return p
}
// PluginContainer returns the global plugin container.
func (p *peer) PluginContainer() *PluginContainer {
return p.pluginContainer
}
// TLSConfig returns the TLS config.
func (p *peer) TLSConfig() *tls.Config {
return p.tlsConfig
}
// SetTLSConfig sets the TLS config.
func (p *peer) SetTLSConfig(tlsConfig *tls.Config) {
p.tlsConfig = tlsConfig
}
// SetTLSConfigFromFile sets the TLS config from file.
func (p *peer) SetTLSConfigFromFile(tlsCertFile, tlsKeyFile string, insecureSkipVerifyForClient ...bool) error {
var err error
p.tlsConfig, err = NewTLSConfigFromFile(tlsCertFile, tlsKeyFile, insecureSkipVerifyForClient...)
return err
}
// GetSession gets the session by id.
func (p *peer) GetSession(sessionID string) (Session, bool) {
return p.sessHub.Get(sessionID)
}
// RangeSession ranges all sessions.
// If fn returns false, stop traversing.
func (p *peer) RangeSession(fn func(sess Session) bool) {
p.sessHub.sessions.Range(func(key, value interface{}) bool {
return fn(value.(*session))
})
}
// CountSession returns the number of sessions.
func (p *peer) CountSession() int {
return p.sessHub.sessions.Len()
}
// Dial connects with the peer of the destination address.
func (p *peer) Dial(addr string, protoFunc ...ProtoFunc) (Session, *Rerror) {
return p.newSessionForClient(func() (net.Conn, error) {
if p.network == "quic" {
ctx := context.Background()
if p.defaultDialTimeout > 0 {
ctx, _ = context.WithTimeout(ctx, p.defaultDialTimeout)
}
if p.tlsConfig == nil {
return quic.DialAddrContext(ctx, addr, &tls.Config{InsecureSkipVerify: true}, nil)
}
return quic.DialAddrContext(ctx, addr, p.tlsConfig, nil)
}
d := &net.Dialer{
LocalAddr: p.localAddr,
Timeout: p.defaultDialTimeout,
}
if p.tlsConfig != nil {
return tls.DialWithDialer(d, p.network, addr, p.tlsConfig)
}
return d.Dial(p.network, addr)
}, addr, protoFunc)
}
type redialTimes int32
func (p *peer) newRedialTimes() *redialTimes {
r := redialTimes(p.redialTimes)
return &r
}
func (r *redialTimes) next() bool {
t := *r
if t == 0 {
return false
}
if t > 0 {
*r--
}
return true
}
func (p *peer) newSessionForClient(dialFunc func() (net.Conn, error), addr string, protoFuncs []ProtoFunc) (*session, *Rerror) {
conn, dialErr := dialFunc()
if dialErr != nil {
redialTimes := p.newRedialTimes()
for redialTimes.next() {
time.Sleep(p.redialInterval)
Debugf("trying to redial... (network:%s, addr:%s)", p.network, addr)
conn, dialErr = dialFunc()
if dialErr == nil {
break
}
}
}
if dialErr != nil {
rerr := rerrDialFailed.Copy().SetReason(dialErr.Error())
return nil, rerr
}
var sess = newSession(p, conn, protoFuncs)
// create redial func
if p.redialTimes != 0 {
sess.redialForClientLocked = func(oldConn net.Conn) bool {
if oldConn != sess.getConn() {
return true
}
var err error
redialTimes := p.newRedialTimes()
for redialTimes.next() {
time.Sleep(p.redialInterval)
Debugf("trying to redial... (network:%s, addr:%s, id:%s)", p.network, sess.RemoteAddr().String(), sess.ID())
err = p.renewSessionForClient(sess, dialFunc, addr, protoFuncs)
if err == nil {
Infof("redial ok (network:%s, addr:%s, id:%s)", p.network, sess.RemoteAddr().String(), sess.ID())
return true
}
// if i > 1 {
// Warnf("redial fail (network:%s, addr:%s, id:%s): %s", p.network, sess.RemoteIP(), sess.ID(), err.Error())
// // Debug:
// time.Sleep(5e9)
// }
}
if err != nil {
Errorf("redial fail (network:%s, addr:%s, id:%s): %s", p.network, sess.RemoteAddr().String(), sess.ID(), err.Error())
}
return false
}
}
sess.socket.SetID(sess.LocalAddr().String())
if rerr := p.pluginContainer.postDial(sess); rerr != nil {
sess.Close()
return nil, rerr
}
AnywayGo(sess.startReadAndHandle)
p.sessHub.Set(sess)
Infof("dial ok (network:%s, addr:%s, id:%s)", p.network, sess.RemoteAddr().String(), sess.ID())
return sess, nil
}
func (p *peer) renewSessionForClient(sess *session, dialFunc func() (net.Conn, error), addr string, protoFuncs []ProtoFunc) error {
var conn, dialErr = dialFunc()
if dialErr != nil {
return dialErr
}
if p.tlsConfig != nil {
conn = tls.Client(conn, p.tlsConfig)
}
oldIP := sess.LocalAddr().String()
oldID := sess.ID()
oldConn := sess.getConn()
if oldConn != nil {
oldConn.Close()
}
sess.socket.Reset(conn, protoFuncs...)
if oldIP == oldID {
sess.socket.SetID(sess.LocalAddr().String())
} else {
sess.socket.SetID(oldID)
}
if rerr := p.pluginContainer.postDial(sess); rerr != nil {
sess.Close()
return rerr.ToError()
}
atomic.StoreInt32(&sess.status, statusOk)
AnywayGo(sess.startReadAndHandle)
p.sessHub.Set(sess)
return nil
}
// ServeConn serves the connection and returns a session.
// NOTE:
// Not support automatically redials after disconnection;
// Execute the PostAcceptPlugin plugins.
func (p *peer) ServeConn(conn net.Conn, protoFunc ...ProtoFunc) (Session, error) {
network := conn.LocalAddr().Network()
if strings.Contains(network, "udp") {
if _, ok := conn.(*quic.Conn); !ok {
return nil, fmt.Errorf("invalid network: %s,\nrefer to the following: tcp, tcp4, tcp6, unix, unixpacket or quic", network)
}
network = "quic"
}
var sess = newSession(p, conn, protoFunc)
if rerr := p.pluginContainer.postAccept(sess); rerr != nil {
sess.Close()
return nil, rerr.ToError()
}
Infof("serve ok (network:%s, addr:%s, id:%s)", network, sess.RemoteAddr().String(), sess.ID())
p.sessHub.Set(sess)
AnywayGo(sess.startReadAndHandle)
return sess, nil
<
8000
div id="LC366" class="react-file-line html-div" data-testid="code-cell" data-line-number="366" style="position:relative">}
// ErrListenClosed listener is closed error.
var ErrListenClosed = errors.New("listener is closed")
// serveListener serves the listener.
// NOTE: The caller ensures that the listener supports graceful shutdown.
func (p *peer) serveListener(lis net.Listener, protoFunc ...ProtoFunc) error {
defer lis.Close()
p.listeners[lis] = struct{}{}
network := lis.Addr().Network()
if _, ok := lis.(*quic.Listener); ok {
network = "quic"
}
addr := lis.Addr().String()
Printf("listen and serve (network:%s, addr:%s)", network, addr)
p.pluginContainer.postListen(lis.Addr())
var (
tempDelay time.Duration // how long to sleep on accept failure
closeCh = p.closeCh
)
for {
conn, e := lis.Accept()
if e != nil {
select {
case <-closeCh:
return ErrListenClosed
default:
}
if ne, ok := e.(net.Error); ok && ne.Temporary() {
if tempDelay == 0 {
tempDelay = 5 * time.Millisecond
} else {
tempDelay *= 2
}
if max := 1 * time.Second; tempDelay > max {
tempDelay = max
}
Tracef("accept error: %s; retrying in %v", e.Error(), tempDelay)
time.Sleep(tempDelay)
continue
}
return e
}
tempDelay = 0
AnywayGo(func() {
if c, ok := conn.(*tls.Conn); ok {
if p.defaultSessionAge > 0 {
c.SetReadDeadline(coarsetime.CeilingTimeNow().Add(p.defaultSessionAge))
}
if p.defaultContextAge > 0 {
c.SetReadDeadline(coarsetime.CeilingTimeNow().Add(p.defaultContextAge))
}
if err := c.Handshake(); err != nil {
Errorf("TLS handshake error from %s: %s", c.RemoteAddr(), err.Error())
return
}
}
var sess = newSession(p, conn, protoFunc)
if rerr := p.pluginContainer.postAccept(sess); rerr != nil {
sess.Close()
return
}
Infof("accept ok (network:%s, addr:%s, id:%s)", network, sess.RemoteAddr().String(), sess.ID())
p.sessHub.Set(sess)
sess.startReadAndHandle()
})
}
}
// ListenAndServe turns on the listening service.
func (p *peer) ListenAndServe(protoFunc ...ProtoFunc) error {
if len(p.listenAddr) == 0 {
Fatalf("listen address can not be empty")
}
lis, err := NewInheritedListener(p.network, p.listenAddr, p.tlsConfig)
if err != nil {
Fatalf("%v", err)
}
return p.serveListener(lis, protoFunc...)
}
// Close closes peer.
func (p *peer) Close() (err error) {
defer func() {
if p := recover(); p != nil {
err = errors.Errorf("panic:%v\n%s", p, goutil.PanicTrace(2))
}
}()
close(p.closeCh)
for lis := range p.listeners {
if _, ok := lis.(*quic.Listener); !ok {
lis.Close()
}
}
deletePeer(p)
var (
count int
errCh = make(chan error, 10)
)
p.sessHub.Range(func(sess *session) bool {
count++
if !Go(func() {
errCh <- sess.Close()
}) {
errCh <- sess.Close()
}
return true
})
for i := 0; i < count; i++ {
err = errors.Merge(err, <-errCh)
}
close(errCh)
for lis := range p.listeners {
if qlis, ok := lis.(*quic.Listener); ok {
err = errors.Merge(err, qlis.Close())
}
}
return err
}
var ctxPool = sync.Pool{
New: func() interface{} {
return newReadHandleCtx()
},
}
func (p *peer) getContext(s *session, withWg bool) *handlerCtx {
if withWg {
// count get context
s.graceCtxWaitGroup.Add(1)
}
ctx := ctxPool.Get().(*handlerCtx)
ctx.clean()
ctx.reInit(s)
return ctx
}
func (p *peer) putContext(ctx *handlerCtx, withWg bool) {
if withWg {
// count get context
ctx.sess.graceCtxWaitGroup.Done()
}
ctxPool.Put(ctx)
}
// Router returns the root router of call or push handlers.
func (p *peer) Router() *Router {
return p.router
}
// SubRoute adds handler group.
func (p *peer) SubRoute(pathPrefix string, plugin ...Plugin) *SubRouter {
return p.router.SubRoute(pathPrefix, plugin...)
}
// RouteCall registers CALL handlers, and returns the paths.
func (p *peer) RouteCall(callCtrlStruct interface{}, plugin ...Plugin) []string {
return p.router.RouteCall(callCtrlStruct, plugin...)
}
// RouteCallFunc registers CALL handler, and returns the path.
func (p *peer) RouteCallFunc(callHandleFunc interface{}, plugin ...Plugin) string {
return p.router.RouteCallFunc(callHandleFunc, plugin...)
}
// RoutePush registers PUSH handlers, and returns the paths.
func (p *peer) RoutePush(pushCtrlStruct interface{}, plugin ...Plugin) []string {
return p.router.RoutePush(pushCtrlStruct, plugin...)
}
// RoutePushFunc registers PUSH handler, and returns the path.
func (p *peer) RoutePushFunc(pushHandleFunc interface{}, plugin ...Plugin) string {
return p.router.RoutePushFunc(pushHandleFunc, plugin...)
}
// SetUnknownCall sets the default handler,
// which is called when no handler for CALL is found.
func (p *peer) SetUnknownCall(fn func(UnknownCallCtx) (interface{}, *Rerror), plugin ...Plugin) {
p.router.SetUnknownCall(fn, plugin...)
}
// SetUnknownPush sets the default handler,
// which is called when no handler for PUSH is found.
func (p *peer) SetUnknownPush(fn func(UnknownPushCtx) *Rerror, plugin ...Plugin) {
p.router.SetUnknownPush(fn, plugin...)
}
// maybe useful
func (p *peer) getCallHandler(uriPath string) (*Handler, bool) {
return p.router.subRouter.getCall(uriPath)
}
func (p *peer) getPushHandler(uriPath string) (*Handler, bool) {
return p.router.subRouter.getPush(uriPath)
}