341 lines
8.1 KiB
Go
341 lines
8.1 KiB
Go
package server
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"hash/crc32"
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"math/rand"
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"net"
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"cert"
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"rakshasa/common"
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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/luyu6056/ishell"
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)
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var (
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// clientListenMap = make(map[uint32]*remoteListen)
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// connectMap = make(map[uint32]*rawConnect)
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)
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type clientListen struct {
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id uint32
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localAddr string
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remoteAddr string
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server *node
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typ string
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openOption byte
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openMsg []byte //掉线重连会用到
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connMap sync.Map //clientListen关闭的时候关掉这里的id
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listen net.Listener
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result chan interface{}
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randkey []byte //随机key int64
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}
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func StartRawBind(str string, dst []string) error {
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n, err := GetNodeFromAddrs(dst)
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if err != nil {
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return err
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}
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addrs, err := common.ResolveTCPAddr(str)
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if err != nil {
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return err
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}
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if len(addrs) != 2 {
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return errors.New("参数错误，格式为ip:port,remote_ip:remote_port")
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}
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l := &clientListen{
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id: common.GetID(),
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localAddr: addrs[0],
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remoteAddr: addrs[1],
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server: n,
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typ: "bind",
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result: make(chan interface{}),
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openOption: common.CMD_LISTEN,
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randkey: make([]byte, 8),
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}
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binary.LittleEndian.PutUint64(l.randkey, uint64(rand.NewSource(time.Now().UnixNano()).Int63()))
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l.openMsg =cert.RSAEncrypterByPrivByte(append(l.randkey,[]byte(addrs[1])...))
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currentNode.listenMap.Store(l.id, l)
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n.Write(l.openOption, l.id, l.openMsg)
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select {
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case res := <-l.result:
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if err, ok := res.(error); ok {
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l.Close(remoteClose)
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currentNode.listenMap.Delete(l.id)
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return err
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}
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case <-time.After(common.CMD_TIMEOUT):
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l.Close(remoteClose)
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currentNode.listenMap.Delete(l.id)
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return fmt.Errorf("listen %s fail time out", addrs[1])
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}
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fmt.Println("bind 启动成功")
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//l := clientLock.Lock()
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//clientListenMap[b.id] = b
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//l.Unlock()
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return nil
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}
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func StartRawConnect(str string, n *node) error {
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addrs, err := common.ResolveTCPAddr(str)
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if len(addrs) != 2 || err != nil {
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return errors.New("-connect参数错误，格式为ip:port,remote_ip:remote_port")
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}
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addr1, _ := net.ResolveTCPAddr("tcp", addrs[1])
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listen, err := net.Listen("tcp", addrs[0])
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if err != nil {
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return errors.New("监听本地端口" + addrs[0] + "失败 " + err.Error())
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}
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l := &clientListen{
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id: common.GetID(),
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localAddr: addrs[0],
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remoteAddr: addrs[1],
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listen: listen,
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server: n,
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typ: "connect",
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randkey: make([]byte, 8),
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}
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binary.LittleEndian.PutUint64(l.randkey, uint64(rand.NewSource(time.Now().UnixNano()).Int63()))
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currentNode.listenMap.Store(l.id, l)
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go func() {
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for {
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conn, err := listen.Accept()
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if err != nil {
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if err.(*net.OpError).Err == net.ErrClosed {
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return
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}
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continue
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}
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s := &clientConnect{
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conn: conn,
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server: n,
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randkey: l.randkey,
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}
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s.OnOpened()
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if s.connect(common.RAW_TCP, addr1.IP.String(), uint16(addr1.Port)) {
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go rawHandleLocal(s)
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} else {
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s.Close(nodeIsClose)
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if common.Debug {
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fmt.Println("Connect连接失败，远程节点已关闭")
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}
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}
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}
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}()
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return nil
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}
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func (l *clientListen) Close(reason string) {
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l.connMap.Range(func(key, value interface{}) bool {
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value.(*clientConnect).Close(reason)
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l.connMap.Delete(key)
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return true
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})
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l.server.listenMap.Delete(l.id)
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if l.listen != nil {
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l.listen.Close()
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}
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}
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func rawHandleLocal(s *clientConnect) {
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buf := make([]byte, common.MAX_PLAINTEXT)
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for {
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n, err := s.conn.Read(buf[8:])
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if err != nil {
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s.Close(err.Error())
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return
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}
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var new_size int64
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if new_size = int64(common.INIT_WINDOWS_SIZE) - s.windowsSize; new_size > 0 { //扩大窗口
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atomic.AddInt64(&s.windowsSize, new_size)
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} else {
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new_size = 0
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}
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buf[0] = byte(new_size)
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buf[1] = byte(new_size >> 8)
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buf[2] = byte(new_size >> 16)
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buf[3] = byte(new_size >> 24)
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buf[4] = byte(new_size >> 32)
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buf[5] = byte(new_size >> 40)
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buf[6] = byte(new_size >> 48)
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buf[7] = byte(new_size >> 56)
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if common.Debug {
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fmt.Println("发送", crc32.ChecksumIEEE(buf[8:8+n]), n)
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}
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data := make([]byte, 8+n)
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copy(data, buf)
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s.server.Write(common.CMD_CONN_MSG, s.id, buf[:8+n])
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}
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}
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func init() {
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bindshell := cliInit()
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bindshell.SetPrompt("rakshasa\\bind>")
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bindshell.AddCmd(&ishell.Cmd{
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Name: "list",
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Help: "列出当前连接的ID和其他信息",
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Func: func(c *ishell.Context) {
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var list []*clientListen
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currentNode.listenMap.Range(func(key, value interface{}) bool {
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if v, ok := value.(*clientListen); ok {
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if v.typ == "bind" {
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list = append(list, v)
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}
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}
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return true
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})
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orderClientListen(list)
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fmt.Println("当前连接数量:", len(list))
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for _, v := range list {
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fmt.Println("ID", v.id, "本地端口", v.localAddr, "远程端口", v.remoteAddr, "服务器uuid", v.server.uuid)
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}
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},
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})
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bindshell.AddCmd(&ishell.Cmd{
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Name: "new-bind",
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Help: "新建一个本地bind，使用方法 new-bind ip:port,remote_ip:remote_port 目标服务器 如 new-bind 192.168.1.180:8808,0.0.0.0:8808 192.168.1.2:1081",
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Func: func(c *ishell.Context) {
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if len(c.Args) != 2 {
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c.Println("参数错误")
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return
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}
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if err := StartRawBind(c.Args[0], strings.Split(c.Args[1], ",")); err != nil {
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c.Println("启动bind失败", err)
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}
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},
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})
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bindshell.AddCmd(&ishell.Cmd{
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Name: "close",
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Help: "关闭一个bind连接，使用方法 close ID",
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Func: func(c *ishell.Context) {
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if len(c.Args) != 1 {
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c.Println("参数错误，例子 close 1")
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return
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}
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id, _ := strconv.Atoi(c.Args[0])
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var l *clientListen
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if value, ok := currentNode.listenMap.Load(uint32(id)); ok {
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if v, ok := value.(*clientListen); ok && v.typ == "bind" {
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l = v
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}
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}
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if l == nil {
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c.Println("没有找到ID为", id, "的连接")
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} else {
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l.Close("命令行关闭")
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l.server.Write(common.CMD_DELETE_LISTEN, l.id, l.randkey)
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currentNode.listenMap.Delete(uint32(id))
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}
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},
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})
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rootCli.AddCmd(&ishell.Cmd{
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Name: "bind",
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Help: "进入bind功能",
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Func: func(c *ishell.Context) {
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bindshell.Run()
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},
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})
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connectshell := cliInit()
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connectshell.SetPrompt("rakshasa\\connect>")
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connectshell.AddCmd(&ishell.Cmd{
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Name: "list",
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Help: "列出当前连接的ID和其他信息",
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Func: func(c *ishell.Context) {
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var list []*clientListen
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currentNode.listenMap.Range(func(key, value interface{}) bool {
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if v, ok := value.(*clientListen); ok {
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if v.typ == "connect" {
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list = append(list, v)
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}
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}
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return true
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})
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orderClientListen(list)
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fmt.Println("当前连接数量:", len(list))
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for _, v := range list {
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fmt.Println("ID", v.id, "本地端口", v.localAddr, "远程端口", v.remoteAddr, "服务器uuid", v.server.uuid)
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}
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},
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})
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connectshell.AddCmd(&ishell.Cmd{
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Name: "new-connect",
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Help: "新建一个本地connect，使用方法 new-connect ip:port,remote_ip:remote_port 目标服务器 如 new-connect 0.0.0.0:88,192.168.1.180:8808 192.168.1.2:1081",
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Func: func(c *ishell.Context) {
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if len(c.Args) != 2 {
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c.Println("参数错误")
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return
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}
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n, err := GetNodeFromAddrs(strings.Split(c.Args[1], ","))
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if err != nil {
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c.Println("connect连接", c.Args[1], "失败", err)
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return
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}
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if err = StartRawConnect(c.Args[0], n); err != nil {
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c.Println(err)
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return
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}
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c.Println("connect连接", c.Args[1], "成功")
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},
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})
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connectshell.AddCmd(&ishell.Cmd{
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Name: "close",
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Help: "关闭一个connect连接，使用方法 close ID",
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Func: func(c *ishell.Context) {
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if len(c.Args) != 1 {
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c.Println("参数错误，例子 close 1")
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return
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}
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id, _ := strconv.Atoi(c.Args[0])
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var l *clientListen
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if value, ok := currentNode.listenMap.Load(uint32(id)); ok {
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if v, ok := value.(*clientListen); ok && v.typ == "connect" {
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l = v
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}
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}
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if l == nil {
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c.Println("没有找到ID为", id, "的连接")
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} else {
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l.Close("命令行关闭")
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l.server.Write(common.CMD_DELETE_LISTEN, l.id, l.randkey)
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currentNode.listenMap.Delete(uint32(id))
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}
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},
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})
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rootCli.AddCmd(&ishell.Cmd{
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Name: "connect",
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Help: "进入connect功能",
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Func: func(c *ishell.Context) {
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connectshell.Run()
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},
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})
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}
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