mirror of
https://github.com/ehang-io/nps.git
synced 2025-07-02 04:00:42 +00:00
559 lines
13 KiB
Go
Executable File
559 lines
13 KiB
Go
Executable File
package bridge
|
||
|
||
import (
|
||
"encoding/binary"
|
||
"errors"
|
||
"fmt"
|
||
"github.com/cnlh/nps/lib/common"
|
||
"github.com/cnlh/nps/lib/conn"
|
||
"github.com/cnlh/nps/lib/crypt"
|
||
"github.com/cnlh/nps/lib/file"
|
||
"github.com/cnlh/nps/lib/pool"
|
||
"github.com/cnlh/nps/lib/version"
|
||
"github.com/cnlh/nps/server/tool"
|
||
"github.com/cnlh/nps/vender/github.com/astaxie/beego"
|
||
"github.com/cnlh/nps/vender/github.com/astaxie/beego/logs"
|
||
"github.com/cnlh/nps/vender/github.com/xtaci/kcp"
|
||
"net"
|
||
"strconv"
|
||
"sync"
|
||
"time"
|
||
)
|
||
|
||
type Client struct {
|
||
tunnel *conn.Conn
|
||
signal *conn.Conn
|
||
msg *conn.Conn
|
||
linkMap map[int]*conn.Link
|
||
linkStatusMap map[int]bool
|
||
stop chan bool
|
||
sync.RWMutex
|
||
}
|
||
|
||
func NewClient(t *conn.Conn, s *conn.Conn, m *conn.Conn) *Client {
|
||
return &Client{
|
||
linkMap: make(map[int]*conn.Link),
|
||
stop: make(chan bool),
|
||
linkStatusMap: make(map[int]bool),
|
||
signal: s,
|
||
tunnel: t,
|
||
msg: m,
|
||
}
|
||
}
|
||
|
||
type Bridge struct {
|
||
TunnelPort int //通信隧道端口
|
||
tcpListener *net.TCPListener //server端监听
|
||
kcpListener *kcp.Listener //server端监听
|
||
Client map[int]*Client
|
||
tunnelType string //bridge type kcp or tcp
|
||
OpenTask chan *file.Tunnel
|
||
CloseClient chan int
|
||
SecretChan chan *conn.Secret
|
||
clientLock sync.RWMutex
|
||
Register map[string]time.Time
|
||
registerLock sync.RWMutex
|
||
ipVerify bool
|
||
runList map[int]interface{}
|
||
}
|
||
|
||
func NewTunnel(tunnelPort int, tunnelType string, ipVerify bool, runList map[int]interface{}) *Bridge {
|
||
t := new(Bridge)
|
||
t.TunnelPort = tunnelPort
|
||
t.Client = make(map[int]*Client)
|
||
t.tunnelType = tunnelType
|
||
t.OpenTask = make(chan *file.Tunnel)
|
||
t.CloseClient = make(chan int)
|
||
t.Register = make(map[string]time.Time)
|
||
t.ipVerify = ipVerify
|
||
t.runList = runList
|
||
t.SecretChan = make(chan *conn.Secret)
|
||
return t
|
||
}
|
||
|
||
func (s *Bridge) StartTunnel() error {
|
||
var err error
|
||
if s.tunnelType == "kcp" {
|
||
s.kcpListener, err = kcp.ListenWithOptions(":"+strconv.Itoa(s.TunnelPort), nil, 150, 3)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
go func() {
|
||
for {
|
||
c, err := s.kcpListener.AcceptKCP()
|
||
conn.SetUdpSession(c)
|
||
if err != nil {
|
||
logs.Warn(err)
|
||
continue
|
||
}
|
||
go s.cliProcess(conn.NewConn(c))
|
||
}
|
||
}()
|
||
} else {
|
||
s.tcpListener, err = net.ListenTCP("tcp", &net.TCPAddr{net.ParseIP("0.0.0.0"), s.TunnelPort, ""})
|
||
if err != nil {
|
||
return err
|
||
}
|
||
go func() {
|
||
for {
|
||
c, err := s.tcpListener.Accept()
|
||
if err != nil {
|
||
logs.Warn(err)
|
||
continue
|
||
}
|
||
go s.cliProcess(conn.NewConn(c))
|
||
}
|
||
}()
|
||
}
|
||
return nil
|
||
}
|
||
|
||
//验证失败，返回错误验证flag，并且关闭连接
|
||
func (s *Bridge) verifyError(c *conn.Conn) {
|
||
c.Write([]byte(common.VERIFY_EER))
|
||
c.Conn.Close()
|
||
}
|
||
|
||
func (s *Bridge) verifySuccess(c *conn.Conn) {
|
||
c.Write([]byte(common.VERIFY_SUCCESS))
|
||
}
|
||
|
||
func (s *Bridge) cliProcess(c *conn.Conn) {
|
||
if b, err := c.ReadLen(32); err != nil || string(b) != crypt.Md5(version.GetVersion()) {
|
||
logs.Info("The client %s version does not match", c.Conn.RemoteAddr())
|
||
c.Close()
|
||
return
|
||
}
|
||
c.Write([]byte(crypt.Md5(version.GetVersion())))
|
||
c.SetReadDeadline(5, s.tunnelType)
|
||
var buf []byte
|
||
var err error
|
||
if buf, err = c.ReadLen(32); err != nil {
|
||
c.Close()
|
||
return
|
||
}
|
||
//验证
|
||
id, err := file.GetCsvDb().GetIdByVerifyKey(string(buf), c.Conn.RemoteAddr().String())
|
||
if err != nil {
|
||
logs.Info("Current client connection validation error, close this client:", c.Conn.RemoteAddr())
|
||
s.verifyError(c)
|
||
return
|
||
} else {
|
||
s.verifySuccess(c)
|
||
}
|
||
//做一个判断 添加到对应的channel里面以供使用
|
||
if flag, err := c.ReadFlag(); err == nil {
|
||
s.typeDeal(flag, c, id)
|
||
} else {
|
||
logs.Warn(err, flag)
|
||
}
|
||
return
|
||
}
|
||
|
||
func (s *Bridge) closeClient(id int) {
|
||
s.clientLock.Lock()
|
||
defer s.clientLock.Unlock()
|
||
if v, ok := s.Client[id]; ok {
|
||
if c, err := file.GetCsvDb().GetClient(id); err == nil && c.NoStore {
|
||
s.CloseClient <- c.Id
|
||
}
|
||
v.signal.WriteClose()
|
||
delete(s.Client, id)
|
||
}
|
||
}
|
||
func (s *Bridge) delClient(id int) {
|
||
s.clientLock.Lock()
|
||
defer s.clientLock.Unlock()
|
||
if v, ok := s.Client[id]; ok {
|
||
if c, err := file.GetCsvDb().GetClient(id); err == nil && c.NoStore {
|
||
s.CloseClient <- c.Id
|
||
}
|
||
v.signal.Close()
|
||
delete(s.Client, id)
|
||
}
|
||
}
|
||
|
||
//tcp连接类型区分
|
||
func (s *Bridge) typeDeal(typeVal string, c *conn.Conn, id int) {
|
||
switch typeVal {
|
||
case common.WORK_MAIN:
|
||
//客户端已经存在，下线
|
||
s.clientLock.Lock()
|
||
if v, ok := s.Client[id]; ok {
|
||
s.clientLock.Unlock()
|
||
if v.signal != nil {
|
||
v.signal.WriteClose()
|
||
}
|
||
v.Lock()
|
||
v.signal = c
|
||
v.Unlock()
|
||
} else {
|
||
s.Client[id] = NewClient(nil, c, nil)
|
||
s.clientLock.Unlock()
|
||
}
|
||
logs.Info("clientId %d connection succeeded, address:%s ", id, c.Conn.RemoteAddr())
|
||
go s.GetStatus(id)
|
||
case common.WORK_CHAN:
|
||
s.clientLock.Lock()
|
||
if v, ok := s.Client[id]; ok {
|
||
s.clientLock.Unlock()
|
||
v.Lock()
|
||
v.tunnel = c
|
||
v.Unlock()
|
||
} else {
|
||
s.Client[id] = NewClient(c, nil, nil)
|
||
s.clientLock.Unlock()
|
||
}
|
||
go s.clientCopy(id)
|
||
case common.WORK_CONFIG:
|
||
go s.GetConfig(c)
|
||
case common.WORK_REGISTER:
|
||
go s.register(c)
|
||
case common.WORK_SECRET:
|
||
if b, err := c.ReadLen(32); err == nil {
|
||
s.SecretChan <- conn.NewSecret(string(b), c)
|
||
}
|
||
case common.WORK_P2P:
|
||
//读取md5密钥
|
||
if b, err := c.ReadLen(32); err != nil {
|
||
return
|
||
} else if t := file.GetCsvDb().GetTaskByMd5Password(string(b)); t == nil {
|
||
return
|
||
} else {
|
||
s.clientLock.Lock()
|
||
if v, ok := s.Client[t.Client.Id]; !ok {
|
||
logs.Error("未获取到对应客户端")
|
||
s.clientLock.Unlock()
|
||
return
|
||
} else {
|
||
logs.Warn("获取到对应客户端")
|
||
s.clientLock.Unlock()
|
||
//向密钥对应的客户端发送与服务端udp建立连接信息，地址，密钥
|
||
logs.Warn(v.signal.Write([]byte(common.NEW_UDP_CONN)))
|
||
svrAddr := beego.AppConfig.String("serverIp") + ":" + beego.AppConfig.String("p2pPort")
|
||
logs.Warn(svrAddr)
|
||
logs.Warn(v.signal.WriteLenContent([]byte(svrAddr)))
|
||
logs.Warn(string(b), v.signal.WriteLenContent(b))
|
||
//向该请求者发送建立连接请求,服务器地址
|
||
c.WriteLenContent([]byte(svrAddr))
|
||
}
|
||
}
|
||
case common.WORK_SEND_STATUS:
|
||
s.clientLock.Lock()
|
||
if v, ok := s.Client[id]; ok {
|
||
s.clientLock.Unlock()
|
||
v.Lock()
|
||
v.msg = c
|
||
v.Unlock()
|
||
} else {
|
||
s.Client[id] = NewClient(nil, nil, c)
|
||
s.clientLock.Unlock()
|
||
}
|
||
go s.getMsgStatus(id)
|
||
}
|
||
c.SetAlive(s.tunnelType)
|
||
return
|
||
}
|
||
|
||
func (s *Bridge) getMsgStatus(clientId int) {
|
||
s.clientLock.Lock()
|
||
client := s.Client[clientId]
|
||
s.clientLock.Unlock()
|
||
|
||
if client == nil {
|
||
return
|
||
}
|
||
for {
|
||
if id, err := client.msg.GetLen(); err != nil {
|
||
s.closeClient(clientId)
|
||
return
|
||
} else {
|
||
client.Lock()
|
||
if v, ok := client.linkMap[id]; ok {
|
||
v.StatusCh <- true
|
||
}
|
||
client.Unlock()
|
||
}
|
||
}
|
||
}
|
||
func (s *Bridge) register(c *conn.Conn) {
|
||
var hour int32
|
||
if err := binary.Read(c, binary.LittleEndian, &hour); err == nil {
|
||
s.registerLock.Lock()
|
||
s.Register[common.GetIpByAddr(c.Conn.RemoteAddr().String())] = time.Now().Add(time.Hour * time.Duration(hour))
|
||
s.registerLock.Unlock()
|
||
}
|
||
}
|
||
|
||
//等待
|
||
func (s *Bridge) waitStatus(clientId, id int) bool {
|
||
ticker := time.NewTicker(time.Millisecond * 100)
|
||
stop := time.After(time.Second * 10)
|
||
for {
|
||
select {
|
||
case <-ticker.C:
|
||
s.clientLock.Lock()
|
||
if v, ok := s.Client[clientId]; ok {
|
||
s.clientLock.Unlock()
|
||
v.Lock()
|
||
if vv, ok := v.linkStatusMap[id]; ok {
|
||
ticker.Stop()
|
||
v.Unlock()
|
||
return vv
|
||
}
|
||
v.Unlock()
|
||
} else {
|
||
s.clientLock.Unlock()
|
||
}
|
||
case <-stop:
|
||
return false
|
||
}
|
||
}
|
||
}
|
||
|
||
func (s *Bridge) SendLinkInfo(clientId int, link *conn.Link, linkAddr string) (tunnel *conn.Conn, err error) {
|
||
s.clientLock.Lock()
|
||
if v, ok := s.Client[clientId]; ok {
|
||
s.clientLock.Unlock()
|
||
if s.ipVerify {
|
||
s.registerLock.Lock()
|
||
ip := common.GetIpByAddr(linkAddr)
|
||
if v, ok := s.Register[ip]; !ok {
|
||
s.registerLock.Unlock()
|
||
return nil, errors.New(fmt.Sprintf("The ip %s is not in the validation list", ip))
|
||
} else {
|
||
if !v.After(time.Now()) {
|
||
return nil, errors.New(fmt.Sprintf("The validity of the ip %s has expired", ip))
|
||
}
|
||
}
|
||
s.registerLock.Unlock()
|
||
}
|
||
|
||
v.signal.SendLinkInfo(link)
|
||
if err != nil {
|
||
logs.Warn("send link information error:", err, link.Id)
|
||
s.DelClient(clientId)
|
||
return
|
||
}
|
||
|
||
if v.tunnel == nil {
|
||
err = errors.New("get tunnel connection error")
|
||
return
|
||
} else {
|
||
tunnel = v.tunnel
|
||
}
|
||
link.MsgConn = v.msg
|
||
v.Lock()
|
||
v.linkMap[link.Id] = link
|
||
v.Unlock()
|
||
if !s.waitStatus(clientId, link.Id) {
|
||
err = errors.New(fmt.Sprintf("connect target %s fail", link.Host))
|
||
return
|
||
}
|
||
} else {
|
||
s.clientLock.Unlock()
|
||
err = errors.New(fmt.Sprintf("the client %d is not connect", clientId))
|
||
}
|
||
return
|
||
}
|
||
|
||
//删除通信通道
|
||
func (s *Bridge) DelClient(id int) {
|
||
s.closeClient(id)
|
||
}
|
||
|
||
//get config
|
||
func (s *Bridge) GetConfig(c *conn.Conn) {
|
||
var client *file.Client
|
||
var fail bool
|
||
|
||
for {
|
||
flag, err := c.ReadFlag()
|
||
if err != nil {
|
||
break
|
||
}
|
||
switch flag {
|
||
case common.WORK_STATUS:
|
||
if b, err := c.ReadLen(16); err != nil {
|
||
break
|
||
} else {
|
||
var str string
|
||
id, err := file.GetCsvDb().GetClientIdByVkey(string(b))
|
||
if err != nil {
|
||
break
|
||
}
|
||
for _, v := range file.GetCsvDb().Hosts {
|
||
if v.Client.Id == id {
|
||
str += v.Remark + common.CONN_DATA_SEQ
|
||
}
|
||
}
|
||
for _, v := range file.GetCsvDb().Tasks {
|
||
if _, ok := s.runList[v.Id]; ok && v.Client.Id == id {
|
||
str += v.Remark + common.CONN_DATA_SEQ
|
||
}
|
||
}
|
||
binary.Write(c, binary.LittleEndian, int32(len([]byte(str))))
|
||
binary.Write(c, binary.LittleEndian, []byte(str))
|
||
}
|
||
case common.NEW_CONF:
|
||
var err error
|
||
if client, err = c.GetConfigInfo(); err != nil {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
} else {
|
||
if err = file.GetCsvDb().NewClient(client); err != nil {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
}
|
||
c.WriteAddOk()
|
||
c.Write([]byte(client.VerifyKey))
|
||
}
|
||
case common.NEW_HOST:
|
||
if h, err := c.GetHostInfo(); err != nil {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
} else if file.GetCsvDb().IsHostExist(h) {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
} else {
|
||
h.Client = client
|
||
file.GetCsvDb().NewHost(h)
|
||
c.WriteAddOk()
|
||
}
|
||
case common.NEW_TASK:
|
||
if t, err := c.GetTaskInfo(); err != nil {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
} else {
|
||
ports := common.GetPorts(t.Ports)
|
||
targets := common.GetPorts(t.Target)
|
||
if len(ports) > 1 && (t.Mode == "tcpServer" || t.Mode == "udpServer") && (len(ports) != len(targets)) {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
} else if t.Mode == "secretServer" {
|
||
ports = append(ports, 0)
|
||
}
|
||
if len(ports) == 0 {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
}
|
||
for i := 0; i < len(ports); i++ {
|
||
tl := new(file.Tunnel)
|
||
tl.Mode = t.Mode
|
||
tl.Port = ports[i]
|
||
if len(ports) == 1 {
|
||
tl.Target = t.Target
|
||
tl.Remark = t.Remark
|
||
} else {
|
||
tl.Remark = t.Remark + "_" + strconv.Itoa(tl.Port)
|
||
tl.Target = t.TargetAddr + ":" + strconv.Itoa(targets[i])
|
||
}
|
||
tl.Id = file.GetCsvDb().GetTaskId()
|
||
tl.Status = true
|
||
tl.Flow = new(file.Flow)
|
||
tl.NoStore = true
|
||
tl.Client = client
|
||
tl.Password = t.Password
|
||
if err := file.GetCsvDb().NewTask(tl); err != nil {
|
||
logs.Notice("Add task error ", err.Error())
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
}
|
||
if b := tool.TestServerPort(tl.Port, tl.Mode); !b && t.Mode != "secretServer" {
|
||
fail = true
|
||
c.WriteAddFail()
|
||
break
|
||
} else {
|
||
s.OpenTask <- tl
|
||
}
|
||
c.WriteAddOk()
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if fail && client != nil {
|
||
s.CloseClient <- client.Id
|
||
}
|
||
c.Close()
|
||
}
|
||
|
||
func (s *Bridge) GetStatus(clientId int) {
|
||
s.clientLock.Lock()
|
||
client := s.Client[clientId]
|
||
s.clientLock.Unlock()
|
||
|
||
if client == nil {
|
||
return
|
||
}
|
||
for {
|
||
if id, status, err := client.signal.GetConnStatus(); err != nil {
|
||
s.closeClient(clientId)
|
||
return
|
||
} else {
|
||
client.Lock()
|
||
client.linkStatusMap[id] = status
|
||
client.Unlock()
|
||
}
|
||
}
|
||
}
|
||
|
||
func (s *Bridge) clientCopy(clientId int) {
|
||
|
||
s.clientLock.Lock()
|
||
client := s.Client[clientId]
|
||
s.clientLock.Unlock()
|
||
|
||
for {
|
||
if id, err := client.tunnel.GetLen(); err != nil {
|
||
logs.Info("read msg content length error close client")
|
||
s.delClient(clientId)
|
||
break
|
||
} else {
|
||
client.Lock()
|
||
if link, ok := client.linkMap[id]; ok {
|
||
client.Unlock()
|
||
if content, err := client.tunnel.GetMsgContent(link); err != nil {
|
||
pool.PutBufPoolCopy(content)
|
||
s.delClient(clientId)
|
||
logs.Notice("read msg content error", err, "close client")
|
||
break
|
||
} else {
|
||
link.MsgCh <- content
|
||
}
|
||
} else {
|
||
client.Unlock()
|
||
continue
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
//TODO 清除有一个未知bug待处理
|
||
func (s *Bridge) linkCleanSession() {
|
||
ticker := time.NewTicker(time.Minute * 5)
|
||
for {
|
||
select {
|
||
case <-ticker.C:
|
||
s.clientLock.Lock()
|
||
for _, v := range s.Client {
|
||
v.Lock()
|
||
for _, vv := range v.linkMap {
|
||
if vv.FinishUse {
|
||
delete(v.linkMap, vv.Id)
|
||
}
|
||
}
|
||
v.Unlock()
|
||
}
|
||
s.clientLock.Unlock()
|
||
}
|
||
}
|
||
}
|