114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
/*
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* Copyright (C) 2020-2022, IrineSistiana
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*
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* This file is part of mosdns.
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*
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* mosdns is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* mosdns is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package tcp_server
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import (
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"context"
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"crypto/tls"
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"fmt"
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"net"
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"strings"
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"time"
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"github.com/IrineSistiana/mosdns/v5/coremain"
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"github.com/IrineSistiana/mosdns/v5/pkg/server"
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"github.com/IrineSistiana/mosdns/v5/pkg/utils"
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"github.com/IrineSistiana/mosdns/v5/plugin/server/server_utils"
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"go.uber.org/zap"
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)
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const PluginType = "tcp_server"
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func init() {
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coremain.RegNewPluginFunc(PluginType, Init, func() any { return new(Args) })
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}
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type Args struct {
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Entry string `yaml:"entry"`
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Listen string `yaml:"listen"`
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Cert string `yaml:"cert"`
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Key string `yaml:"key"`
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IdleTimeout int `yaml:"idle_timeout"`
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}
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func (a *Args) init() {
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utils.SetDefaultString(&a.Listen, "127.0.0.1:53")
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utils.SetDefaultNum(&a.IdleTimeout, 10)
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}
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type TcpServer struct {
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args *Args
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l net.Listener
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}
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func (s *TcpServer) Close() error {
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return s.l.Close()
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}
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func Init(bp *coremain.BP, args any) (any, error) {
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return StartServer(bp, args.(*Args))
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}
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func StartServer(bp *coremain.BP, args *Args) (*TcpServer, error) {
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dh, err := server_utils.NewHandler(bp, args.Entry)
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if err != nil {
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return nil, fmt.Errorf("failed to init dns handler, %w", err)
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}
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// Init tls
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var tc *tls.Config
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if len(args.Key)+len(args.Cert) > 0 {
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tc = new(tls.Config)
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if err := server.LoadCert(tc, args.Cert, args.Key); err != nil {
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return nil, fmt.Errorf("failed to read tls cert, %w", err)
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}
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}
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socketOpt := server_utils.ListenerSocketOpts{
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SO_REUSEPORT: true,
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SO_RCVBUF: 64 * 1024,
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}
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lc := net.ListenConfig{Control: server_utils.ListenerControl(socketOpt)}
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listenerNetwork := "tcp"
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if strings.HasPrefix(args.Listen, "@") {
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listenerNetwork = "unix"
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}
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l, err := lc.Listen(context.Background(), listenerNetwork, args.Listen)
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if err != nil {
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return nil, fmt.Errorf("failed to listen socket, %w", err)
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}
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if tc != nil {
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l = tls.NewListener(l, tc)
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}
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bp.L().Info("tcp server started", zap.Stringer("addr", l.Addr()), zap.Bool("tls", tc != nil))
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go func() {
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defer l.Close()
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serverOpts := server.TCPServerOpts{Logger: bp.L(), IdleTimeout: time.Duration(args.IdleTimeout) * time.Second}
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err := server.ServeTCP(l, dh, serverOpts)
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bp.M().GetSafeClose().SendCloseSignal(err)
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}()
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return &TcpServer{
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args: args,
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l: l,
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}, nil
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}
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