125 lines
3.2 KiB
Go
125 lines
3.2 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package yggconn
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import (
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"context"
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"net"
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"strings"
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"time"
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"github.com/libp2p/go-yamux"
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)
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func (n *Node) yamuxConfig() *yamux.Config {
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cfg := yamux.DefaultConfig()
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cfg.EnableKeepAlive = false
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cfg.ConnectionWriteTimeout = time.Second * 5
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cfg.MaxMessageSize = 65535
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cfg.ReadBufSize = 655350
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return cfg
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}
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func (n *Node) listenFromYgg() {
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for {
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conn, err := n.listener.Accept()
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if err != nil {
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n.log.Println("n.listener.Accept:", err)
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return
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}
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var session *yamux.Session
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// If the remote address is lower than ours then we'll be the
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// server. Otherwse we'll be the client.
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if strings.Compare(conn.RemoteAddr().String(), n.DerivedServerName()) < 0 {
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session, err = yamux.Server(conn, n.yamuxConfig())
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} else {
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session, err = yamux.Client(conn, n.yamuxConfig())
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}
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if err != nil {
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return
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}
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go n.listenFromYggConn(session)
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}
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}
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func (n *Node) listenFromYggConn(session *yamux.Session) {
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n.sessions.Store(session.RemoteAddr().String(), session)
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defer n.sessions.Delete(session.RemoteAddr())
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defer func() {
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if err := session.Close(); err != nil {
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n.log.Println("session.Close:", err)
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}
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}()
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for {
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st, err := session.AcceptStream()
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if err != nil {
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n.log.Println("session.AcceptStream:", err)
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return
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}
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n.incoming <- st
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}
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}
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// Implements net.Listener
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func (n *Node) Accept() (net.Conn, error) {
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return <-n.incoming, nil
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}
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// Implements net.Listener
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func (n *Node) Close() error {
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return n.listener.Close()
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}
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// Implements net.Listener
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func (n *Node) Addr() net.Addr {
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return n.listener.Addr()
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}
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// Implements http.Transport.Dial
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func (n *Node) Dial(network, address string) (net.Conn, error) {
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return n.DialContext(context.TODO(), network, address)
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}
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// Implements http.Transport.DialContext
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func (n *Node) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
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s, ok1 := n.sessions.Load(address)
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session, ok2 := s.(*yamux.Session)
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if !ok1 || !ok2 || (ok1 && ok2 && session.IsClosed()) {
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conn, err := n.dialer.DialContext(ctx, network, address)
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if err != nil {
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n.log.Println("n.dialer.DialContext:", err)
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return nil, err
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}
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// If the remote address is lower than ours then we will be the
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// server. Otherwise we'll be the client.
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if strings.Compare(conn.RemoteAddr().String(), n.DerivedServerName()) < 0 {
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session, err = yamux.Server(conn, n.yamuxConfig())
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} else {
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session, err = yamux.Client(conn, n.yamuxConfig())
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}
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if err != nil {
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return nil, err
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}
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go n.listenFromYggConn(session)
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}
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st, err := session.OpenStream()
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if err != nil {
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n.log.Println("session.OpenStream:", err)
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return nil, err
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}
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return st, nil
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}
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