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Fixes #339
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| /* | ||
| * Copyright (c) 2023 Andy Pan. | ||
| * | ||
| * 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 gnet | ||
|
|
||
| import ( | ||
| "net" | ||
| "runtime" | ||
| ) | ||
|
|
||
| func (eng *engine) listen() (err error) { | ||
| if eng.opts.LockOSThread { | ||
| runtime.LockOSThread() | ||
| defer runtime.UnlockOSThread() | ||
| } | ||
|
|
||
| defer func() { eng.shutdown(err) }() | ||
|
|
||
| var buffer [0x10000]byte | ||
| for { | ||
| if eng.ln.pc != nil { | ||
| // Read data from UDP socket. | ||
| n, addr, e := eng.ln.pc.ReadFrom(buffer[:]) | ||
| if e != nil { | ||
| err = e | ||
| eng.opts.Logger.Errorf("failed to receive data from UDP fd due to error:%v", err) | ||
| return | ||
| } | ||
|
|
||
| el := eng.lb.next(addr) | ||
| c := newUDPConn(el, eng.ln.addr, addr) | ||
| el.ch <- packUDPConn(c, buffer[:n]) | ||
| } else { | ||
| // Accept TCP socket. | ||
| tc, e := eng.ln.ln.Accept() | ||
| if e != nil { | ||
| err = e | ||
| eng.opts.Logger.Errorf("Accept() fails due to error: %v", err) | ||
| return | ||
| } | ||
| el := eng.lb.next(tc.RemoteAddr()) | ||
| c := newTCPConn(tc, el) | ||
| el.ch <- c | ||
| go func(c *conn, tc net.Conn, el *eventloop) { | ||
| var buffer [0x10000]byte | ||
| for { | ||
| n, err := tc.Read(buffer[:]) | ||
| if err != nil { | ||
| el.ch <- &netErr{c, err} | ||
| return | ||
| } | ||
| el.ch <- packTCPConn(c, buffer[:n]) | ||
| } | ||
| }(c, tc, el) | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,220 @@ | ||
| /* | ||
| * Copyright (c) 2023 Andy Pan. | ||
| * | ||
| * 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 gnet | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
| "os" | ||
| "path/filepath" | ||
| "sync" | ||
|
|
||
| "golang.org/x/sync/errgroup" | ||
|
|
||
| errorx "github.com/panjf2000/gnet/v2/pkg/errors" | ||
| "github.com/panjf2000/gnet/v2/pkg/logging" | ||
| ) | ||
|
|
||
| type Client struct { | ||
| opts *Options | ||
| el *eventloop | ||
| logFlush func() error | ||
| } | ||
|
|
||
| func NewClient(eh EventHandler, opts ...Option) (cli *Client, err error) { | ||
| options := loadOptions(opts...) | ||
| cli = &Client{opts: options} | ||
| var logger logging.Logger | ||
| if options.LogPath != "" { | ||
| if logger, cli.logFlush, err = logging.CreateLoggerAsLocalFile(options.LogPath, options.LogLevel); err != nil { | ||
| return | ||
| } | ||
| } else { | ||
| logger = logging.GetDefaultLogger() | ||
| } | ||
| if options.Logger == nil { | ||
| options.Logger = logger | ||
| } | ||
|
|
||
| eg := errgroup.Group{} | ||
|
|
||
| shutdownCtx, cancel := context.WithCancel(context.Background()) | ||
| eng := &engine{ | ||
| ln: &listener{}, | ||
| opts: options, | ||
| workerPool: struct { | ||
| *errgroup.Group | ||
| shutdownCtx context.Context | ||
| shutdown context.CancelFunc | ||
| }{&eg, shutdownCtx, cancel}, | ||
| eventHandler: eh, | ||
| } | ||
| cli.el = &eventloop{ | ||
| ch: make(chan interface{}, 1024), | ||
| eng: eng, | ||
| connections: make(map[*conn]struct{}), | ||
| eventHandler: eh, | ||
| } | ||
| return | ||
| } | ||
|
|
||
| func (cli *Client) Start() error { | ||
| cli.el.eventHandler.OnBoot(Engine{}) | ||
| cli.el.eng.workerPool.Go(cli.el.run) | ||
| if cli.opts.Ticker { | ||
| cli.el.eng.ticker.ctx, cli.el.eng.ticker.cancel = context.WithCancel(context.Background()) | ||
| cli.el.eng.workerPool.Go(func() error { | ||
| cli.el.ticker(cli.el.eng.ticker.ctx) | ||
| return nil | ||
| }) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (cli *Client) Stop() (err error) { | ||
| cli.el.ch <- errorx.ErrEngineShutdown | ||
| if cli.opts.Ticker { | ||
| cli.el.eng.ticker.cancel() | ||
| } | ||
| _ = cli.el.eng.workerPool.Wait() | ||
| cli.el.eventHandler.OnShutdown(Engine{}) | ||
| if cli.logFlush != nil { | ||
| err = cli.logFlush() | ||
| } | ||
| logging.Cleanup() | ||
| return | ||
| } | ||
|
|
||
| var ( | ||
| mu sync.RWMutex | ||
| unixAddrDirs = make(map[string]string) | ||
| ) | ||
|
|
||
| // unixAddr uses os.MkdirTemp to get a name that is unique. | ||
| func unixAddr(addr string) string { | ||
| // Pass an empty pattern to get a directory name that is as short as possible. | ||
| // If we end up with a name longer than the sun_path field in the sockaddr_un | ||
| // struct, we won't be able to make the syscall to open the socket. | ||
| d, err := os.MkdirTemp("", "") | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| tmpAddr := filepath.Join(d, addr) | ||
| mu.Lock() | ||
| unixAddrDirs[tmpAddr] = d | ||
| mu.Unlock() | ||
|
|
||
| return tmpAddr | ||
| } | ||
|
|
||
| func (cli *Client) Dial(network, addr string) (Conn, error) { | ||
| var ( | ||
| c net.Conn | ||
| err error | ||
| ) | ||
| if network == "unix" { | ||
| laddr, _ := net.ResolveUnixAddr(network, unixAddr(addr)) | ||
| raddr, _ := net.ResolveUnixAddr(network, addr) | ||
| c, err = net.DialUnix(network, laddr, raddr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } else { | ||
| c, err = net.Dial(network, addr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| return cli.Enroll(c) | ||
| } | ||
|
|
||
| func (cli *Client) Enroll(nc net.Conn) (gc Conn, err error) { | ||
| switch v := nc.(type) { | ||
| case *net.TCPConn: | ||
| if cli.opts.TCPNoDelay == TCPNoDelay { | ||
| if err = v.SetNoDelay(true); err != nil { | ||
| return | ||
| } | ||
| } | ||
| if cli.opts.TCPKeepAlive > 0 { | ||
| if err = v.SetKeepAlive(true); err != nil { | ||
| return | ||
| } | ||
| if err = v.SetKeepAlivePeriod(cli.opts.TCPKeepAlive); err != nil { | ||
| return | ||
| } | ||
| } | ||
|
|
||
| c := newTCPConn(nc, cli.el) | ||
| cli.el.ch <- c | ||
| go func(c *conn, tc net.Conn, el *eventloop) { | ||
| var buffer [0x10000]byte | ||
| for { | ||
| n, err := tc.Read(buffer[:]) | ||
| if err != nil { | ||
| el.ch <- &netErr{c, err} | ||
| return | ||
| } | ||
| el.ch <- packTCPConn(c, buffer[:n]) | ||
| } | ||
| }(c, nc, cli.el) | ||
| gc = c | ||
| case *net.UnixConn: | ||
| c := newTCPConn(nc, cli.el) | ||
| cli.el.ch <- c | ||
| go func(c *conn, uc net.Conn, el *eventloop) { | ||
| var buffer [0x10000]byte | ||
| for { | ||
| n, err := uc.Read(buffer[:]) | ||
| if err != nil { | ||
| el.ch <- &netErr{c, err} | ||
| mu.RLock() | ||
| tmpDir := unixAddrDirs[uc.LocalAddr().String()] | ||
| mu.RUnlock() | ||
| if err := os.RemoveAll(tmpDir); err != nil { | ||
| logging.Errorf("failed to remove temporary directory for unix local address: %v", err) | ||
| } | ||
| return | ||
| } | ||
| el.ch <- packTCPConn(c, buffer[:n]) | ||
| } | ||
| }(c, nc, cli.el) | ||
| gc = c | ||
| case *net.UDPConn: | ||
| c := newUDPConn(cli.el, nc.LocalAddr(), nc.RemoteAddr()) | ||
| c.rawConn = nc | ||
| go func(uc net.Conn, el *eventloop) { | ||
| var buffer [0x10000]byte | ||
| for { | ||
| n, err := uc.Read(buffer[:]) | ||
| if err != nil { | ||
| return | ||
| } | ||
| c := newUDPConn(cli.el, uc.LocalAddr(), uc.RemoteAddr()) | ||
| c.rawConn = uc | ||
| el.ch <- packUDPConn(c, buffer[:n]) | ||
| } | ||
| }(nc, cli.el) | ||
| gc = c | ||
| default: | ||
| return nil, errorx.ErrUnsupportedProtocol | ||
| } | ||
|
|
||
| return | ||
| } |
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