update
This commit is contained in:
arraykeys
+211
@@ -0,0 +1,211 @@
|
||||
package services
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"fmt"
|
||||
"hash/crc32"
|
||||
"io"
|
||||
"log"
|
||||
"net"
|
||||
"proxy/utils"
|
||||
"runtime/debug"
|
||||
"strconv"
|
||||
"strings"
|
||||
"time"
|
||||
)
|
||||
|
||||
type UDP struct {
|
||||
p utils.ConcurrentMap
|
||||
outPool utils.OutPool
|
||||
cfg UDPArgs
|
||||
sc *utils.ServerChannel
|
||||
}
|
||||
|
||||
func NewUDP() Service {
|
||||
return &UDP{
|
||||
outPool: utils.OutPool{},
|
||||
p: utils.NewConcurrentMap(),
|
||||
}
|
||||
}
|
||||
func (s *UDP) InitService() {
|
||||
if *s.cfg.ParentType != TYPE_UDP {
|
||||
s.InitOutConnPool()
|
||||
}
|
||||
}
|
||||
func (s *UDP) StopService() {
|
||||
if s.outPool.Pool != nil {
|
||||
s.outPool.Pool.ReleaseAll()
|
||||
}
|
||||
}
|
||||
func (s *UDP) Start(args interface{}) (err error) {
|
||||
s.cfg = args.(UDPArgs)
|
||||
if *s.cfg.Parent != "" {
|
||||
log.Printf("use %s parent %s", *s.cfg.ParentType, *s.cfg.Parent)
|
||||
} else {
|
||||
log.Fatalf("parent required for udp %s", *s.cfg.Local)
|
||||
}
|
||||
|
||||
s.InitService()
|
||||
|
||||
host, port, _ := net.SplitHostPort(*s.cfg.Local)
|
||||
p, _ := strconv.Atoi(port)
|
||||
sc := utils.NewServerChannel(host, p)
|
||||
s.sc = &sc
|
||||
err = sc.ListenUDP(s.callback)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
log.Printf("udp proxy on %s", (*sc.UDPListener).LocalAddr())
|
||||
return
|
||||
}
|
||||
|
||||
func (s *UDP) Clean() {
|
||||
s.StopService()
|
||||
}
|
||||
func (s *UDP) callback(packet []byte, localAddr, srcAddr *net.UDPAddr) {
|
||||
defer func() {
|
||||
if err := recover(); err != nil {
|
||||
log.Printf("udp conn handler crashed with err : %s \nstack: %s", err, string(debug.Stack()))
|
||||
}
|
||||
}()
|
||||
var err error
|
||||
switch *s.cfg.ParentType {
|
||||
case TYPE_TCP:
|
||||
fallthrough
|
||||
case TYPE_TLS:
|
||||
err = s.OutToTCP(packet, localAddr, srcAddr)
|
||||
case TYPE_UDP:
|
||||
err = s.OutToUDP(packet, localAddr, srcAddr)
|
||||
default:
|
||||
err = fmt.Errorf("unkown parent type %s", *s.cfg.ParentType)
|
||||
}
|
||||
if err != nil {
|
||||
log.Printf("connect to %s parent %s fail, ERR:%s", *s.cfg.ParentType, *s.cfg.Parent, err)
|
||||
}
|
||||
}
|
||||
func (s *UDP) GetConn(connKey string) (conn net.Conn, isNew bool, err error) {
|
||||
isNew = !s.p.Has(connKey)
|
||||
var _conn interface{}
|
||||
if isNew {
|
||||
_conn, err = s.outPool.Pool.Get()
|
||||
if err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
s.p.Set(connKey, _conn)
|
||||
} else {
|
||||
_conn, _ = s.p.Get(connKey)
|
||||
}
|
||||
conn = _conn.(net.Conn)
|
||||
return
|
||||
}
|
||||
func (s *UDP) OutToTCP(packet []byte, localAddr, srcAddr *net.UDPAddr) (err error) {
|
||||
numLocal := crc32.ChecksumIEEE([]byte(localAddr.String()))
|
||||
numSrc := crc32.ChecksumIEEE([]byte(srcAddr.String()))
|
||||
mod := uint32(*s.cfg.PoolSize)
|
||||
if mod == 0 {
|
||||
mod = 10
|
||||
}
|
||||
connKey := uint64((numLocal/10)*10 + numSrc%mod)
|
||||
conn, isNew, err := s.GetConn(fmt.Sprintf("%d", connKey))
|
||||
if err != nil {
|
||||
log.Printf("upd get conn to %s parent %s fail, ERR:%s", *s.cfg.ParentType, *s.cfg.Parent, err)
|
||||
return
|
||||
}
|
||||
if isNew {
|
||||
go func() {
|
||||
defer func() {
|
||||
if err := recover(); err != nil {
|
||||
log.Printf("udp conn handler out to tcp crashed with err : %s \nstack: %s", err, string(debug.Stack()))
|
||||
}
|
||||
}()
|
||||
log.Printf("conn %d created , local: %s", connKey, srcAddr.String())
|
||||
for {
|
||||
srcAddrFromConn, body, err := utils.ReadUDPPacket(&conn)
|
||||
if err == io.EOF || err == io.ErrUnexpectedEOF {
|
||||
//log.Printf("connection %d released", connKey)
|
||||
s.p.Remove(fmt.Sprintf("%d", connKey))
|
||||
break
|
||||
}
|
||||
if err != nil {
|
||||
log.Printf("parse revecived udp packet fail, err: %s", err)
|
||||
continue
|
||||
}
|
||||
//log.Printf("udp packet revecived over parent , local:%s", srcAddrFromConn)
|
||||
_srcAddr := strings.Split(srcAddrFromConn, ":")
|
||||
if len(_srcAddr) != 2 {
|
||||
log.Printf("parse revecived udp packet fail, addr error : %s", srcAddrFromConn)
|
||||
continue
|
||||
}
|
||||
port, _ := strconv.Atoi(_srcAddr[1])
|
||||
dstAddr := &net.UDPAddr{IP: net.ParseIP(_srcAddr[0]), Port: port}
|
||||
_, err = s.sc.UDPListener.WriteToUDP(body, dstAddr)
|
||||
if err != nil {
|
||||
log.Printf("udp response to local %s fail,ERR:%s", srcAddr, err)
|
||||
continue
|
||||
}
|
||||
//log.Printf("udp response to local %s success", srcAddr)
|
||||
}
|
||||
}()
|
||||
}
|
||||
//log.Printf("select conn %d , local: %s", connKey, srcAddr.String())
|
||||
writer := bufio.NewWriter(conn)
|
||||
//fmt.Println(conn, writer)
|
||||
writer.Write(utils.UDPPacket(srcAddr.String(), packet))
|
||||
err = writer.Flush()
|
||||
if err != nil {
|
||||
log.Printf("write udp packet to %s fail ,flush err:%s", *s.cfg.Parent, err)
|
||||
return
|
||||
}
|
||||
//log.Printf("write packet %v", packet)
|
||||
return
|
||||
}
|
||||
func (s *UDP) OutToUDP(packet []byte, localAddr, srcAddr *net.UDPAddr) (err error) {
|
||||
//log.Printf("udp packet revecived:%s,%v", srcAddr, packet)
|
||||
dstAddr, err := net.ResolveUDPAddr("udp", *s.cfg.Parent)
|
||||
if err != nil {
|
||||
log.Printf("resolve udp addr %s fail fail,ERR:%s", dstAddr.String(), err)
|
||||
return
|
||||
}
|
||||
clientSrcAddr := &net.UDPAddr{IP: net.IPv4zero, Port: 0}
|
||||
conn, err := net.DialUDP("udp", clientSrcAddr, dstAddr)
|
||||
if err != nil {
|
||||
log.Printf("connect to udp %s fail,ERR:%s", dstAddr.String(), err)
|
||||
return
|
||||
}
|
||||
conn.SetDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
|
||||
_, err = conn.Write(packet)
|
||||
if err != nil {
|
||||
log.Printf("send udp packet to %s fail,ERR:%s", dstAddr.String(), err)
|
||||
return
|
||||
}
|
||||
//log.Printf("send udp packet to %s success", dstAddr.String())
|
||||
buf := make([]byte, 512)
|
||||
len, _, err := conn.ReadFromUDP(buf)
|
||||
if err != nil {
|
||||
log.Printf("read udp response from %s fail ,ERR:%s", dstAddr.String(), err)
|
||||
return
|
||||
}
|
||||
//log.Printf("revecived udp packet from %s , %v", dstAddr.String(), respBody)
|
||||
_, err = s.sc.UDPListener.WriteToUDP(buf[0:len], srcAddr)
|
||||
if err != nil {
|
||||
log.Printf("send udp response to cluster fail ,ERR:%s", err)
|
||||
return
|
||||
}
|
||||
//log.Printf("send udp response to cluster success ,from:%s", dstAddr.String())
|
||||
return
|
||||
}
|
||||
func (s *UDP) InitOutConnPool() {
|
||||
if *s.cfg.ParentType == TYPE_TLS || *s.cfg.ParentType == TYPE_TCP {
|
||||
//dur int, isTLS bool, certBytes, keyBytes []byte,
|
||||
//parent string, timeout int, InitialCap int, MaxCap int
|
||||
s.outPool = utils.NewOutPool(
|
||||
*s.cfg.CheckParentInterval,
|
||||
*s.cfg.ParentType == TYPE_TLS,
|
||||
s.cfg.CertBytes, s.cfg.KeyBytes,
|
||||
*s.cfg.Parent,
|
||||
*s.cfg.Timeout,
|
||||
*s.cfg.PoolSize,
|
||||
*s.cfg.PoolSize*2,
|
||||
)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user