init

gold/head/packet.go

@@ -1,5 +1,7 @@
 package head
 
+import "encoding/json"
+
 type Packet struct {
 	DataSZ  uint32
 	Proto   uint8
@@ -21,10 +23,13 @@ func NewPacket(proto uint8, srcPort uint16, dstPort uint16, data []byte) *Packet
 	}
 }
 
-func (p *Packet) UnMashal(data []byte) {
-
+func (p *Packet) UnMashal(data []byte) error {
+	return json.Unmarshal(data, p)
 }
 
-func (p *Packet) Mashal(src string, dst string) []byte {
-	return nil
+func (p *Packet) Mashal(src string, dst string) ([]byte, error) {
+	p.DataSZ = uint32(len(p.Data))
+	p.Src = src
+	p.Dst = dst
+	return json.Marshal(p)
 }

gold/link/link.go

@@ -6,59 +6,53 @@ import (
 	"sync"
 
 	"github.com/fumiama/WireGold/gold/head"
+	"github.com/sirupsen/logrus"
 )
 
 type Link struct {
-	conn          net.Conn
-	peer          *Identity
+	PubicKey      [32]byte
+	EndPoint      string
+	KeepAlive     int64
+	pipe          chan *head.Packet
 	peerip        net.IP
+	endpoint      *net.UDPAddr
 	hasKeepRuning bool
 }
 
 var (
 	connections = make(map[string]*Link)
 	connmapmu   sync.RWMutex
+	myconn      *net.UDPConn
 )
 
-func Connect(peer string) (l Link, err error) {
-	peer = net.ParseIP(peer).String()
-	p, ok := IsInPeer(peer)
+func Connect(peer string) (*Link, error) {
+	p, ok := IsInPeer(net.ParseIP(peer).String())
 	if ok {
-		connmapmu.RLock()
-		lnk, ok := connections[peer]
-		connmapmu.RUnlock()
-		if ok {
-			return *lnk, nil
-		}
-		l.conn, err = net.Dial("udp", p.EndPoint)
-		l.peer = p
-		l.peerip = net.ParseIP(peer)
-		connmapmu.Lock()
-		connections[l.peerip.String()] = &l
-		connmapmu.Unlock()
-		l.keepAlive()
-	} else {
-		err = errors.New("peer not exist")
+		p.keepAlive()
+		return p, nil
 	}
-	return
+	return nil, errors.New("peer not exist")
 }
 
 func (l *Link) Close() {
-	l.conn.Close()
 	connmapmu.Lock()
 	delete(connections, l.peerip.String())
 	connmapmu.Unlock()
 }
 
 func (l *Link) Read() *head.Packet {
-	return <-l.peer.pipe
+	return <-l.pipe
 }
 
 func (l *Link) Write(p *head.Packet) (n int, err error) {
-	d := p.Mashal(me.String(), l.peerip.String())
-	d, err = l.peer.Encode(d)
+	var d []byte
+	d, err = p.Mashal(me.String(), l.peerip.String())
+	logrus.Debugln("[link] write data", string(d))
 	if err == nil {
-		n, err = l.conn.Write(d)
+		d, err = l.Encode(d)
+		if err == nil {
+			n, err = myconn.WriteToUDP(d, l.endpoint)
+		}
 	}
 	return
 }

gold/link/link_test.go

@@ -0,0 +1,31 @@
+package link
+
+import (
+	"net"
+	"testing"
+)
+
+func TestUDP(t *testing.T) {
+	t.Log("test start")
+	lconn, err := net.ListenUDP("udp", &net.UDPAddr{Port: 1234})
+	if err == nil {
+		dconn, err := net.DialUDP("udp", &net.UDPAddr{Port: 1235}, &net.UDPAddr{Port: 1234})
+		if err != nil {
+			t.Fatal(err)
+		}
+		_, err = dconn.Write(([]byte)("1234567890"))
+		t.Log("write succ")
+		if err != nil {
+			t.Fatal(err)
+		}
+		d := make([]byte, 10)
+		_, err = lconn.Read(d)
+		t.Log("read succ")
+		if err != nil {
+			t.Fatal(err)
+		}
+		t.Log(d)
+	} else {
+		t.Fatal(err)
+	}
+}

gold/link/local.go

@@ -10,33 +10,47 @@ import (
 var (
 	privKey [32]byte
 	me      net.IP
+	myend   *net.UDPAddr
 )
 
-func SetMyself(privateKey [32]byte, myIP string) {
+func SetMyself(privateKey [32]byte, myIP string, myEndpoint string) {
 	privKey = privateKey
+	var err error
+	myend, err = net.ResolveUDPAddr("udp", myEndpoint)
+	if err != nil {
+		panic(err)
+	}
 	me = net.ParseIP(myIP)
+	myconn, err = listen()
+	if err != nil {
+		panic(err)
+	}
 }
 
-func (id *Identity) Encode(b []byte) (eb []byte, err error) {
+func (l *Link) Encode(b []byte) (eb []byte, err error) {
 	return b, nil
 }
 
-func (id *Identity) Decode(b []byte) (db []byte, err error) {
+func (l *Link) Decode(b []byte) (db []byte, err error) {
 	return b, nil
 }
 
-func Listen(endpoint string) error {
-	conn, err := net.ListenPacket("udp", endpoint)
+func listen() (conn *net.UDPConn, err error) {
+	conn, err = net.ListenUDP("udp", myend)
 	if err == nil {
 		go func() {
 			listenbuff := make([]byte, 65536)
 			for {
-				_, addr, err := conn.ReadFrom(listenbuff)
+				lbf := listenbuff
+				n, addr, err := conn.ReadFromUDP(lbf)
 				if err == nil {
-					p, ok := IsInPeer(addr.String())
+					lbf = lbf[:n]
+					p, ok := IsEndpointInPeer(addr.String())
+					logrus.Infoln("[link] recv from endpoint", addr)
+					logrus.Debugln("[link] recv:", string(lbf))
 					if ok {
 						packet := head.Packet{}
-						d, err := p.Decode(listenbuff)
+						d, err := p.Decode(lbf)
 						if err == nil {
 							packet.UnMashal(d)
 							r := packet.DataSZ - uint32(len(packet.Data))
@@ -45,7 +59,7 @@ func Listen(endpoint string) error {
 								n := 0
 								remain := make([]byte, r)
 								for r > 0 {
-									n, _, err = conn.ReadFrom(remain[i:])
+									n, _, err = conn.ReadFromUDP(remain[i:])
 									if err == nil {
 										i += n
 										r -= uint32(n)
@@ -56,6 +70,7 @@ func Listen(endpoint string) error {
 								}
 								packet.Data = append(packet.Data, remain...)
 							}
+							logrus.Infoln("[link] deliver to", p.peerip)
 							p.pipe <- &packet
 						}
 					}
@@ -63,5 +78,5 @@ func Listen(endpoint string) error {
 			}
 		}()
 	}
-	return err
+	return
 }

gold/link/nat.go

@@ -9,10 +9,10 @@ import (
 )
 
 func (l *Link) keepAlive() {
-	if l.peer.KeepAlive > 0 && !l.hasKeepRuning {
+	if l.KeepAlive > 0 && !l.hasKeepRuning {
 		l.hasKeepRuning = true
 		go func() {
-			t := time.NewTicker(time.Second * time.Duration(l.peer.KeepAlive))
+			t := time.NewTicker(time.Second * time.Duration(l.KeepAlive))
 			for range t.C {
 				_, _ = l.Write(head.NewPacket(head.ProtoHello, 0, 0, nil))
 				logrus.Infoln("[link.nat] send keep alive packet")

gold/link/peer.go

@@ -0,0 +1,55 @@
+package link
+
+import (
+	"net"
+	"sync"
+
+	"github.com/fumiama/WireGold/gold/head"
+)
+
+var (
+	eps  = make(map[string]*Link)
+	epmu sync.RWMutex
+)
+
+func AddPeer(peerip string, pubicKey [32]byte, endPoint string, keepAlive int64) (l *Link) {
+	peerip = net.ParseIP(peerip).String()
+	var ok bool
+	l, ok = IsInPeer(peerip)
+	if ok {
+		return
+	}
+	e, err := net.ResolveUDPAddr("udp", endPoint)
+	if err != nil {
+		panic(err)
+	}
+	l = &Link{
+		PubicKey:  pubicKey,
+		EndPoint:  endPoint,
+		KeepAlive: keepAlive,
+		pipe:      make(chan *head.Packet, 32),
+		peerip:    net.ParseIP(peerip),
+		endpoint:  e,
+	}
+	connmapmu.Lock()
+	epmu.Lock()
+	connections[peerip] = l
+	eps[endPoint] = l
+	connmapmu.Unlock()
+	epmu.Unlock()
+	return
+}
+
+func IsInPeer(peer string) (p *Link, ok bool) {
+	connmapmu.RLock()
+	p, ok = connections[peer]
+	connmapmu.RUnlock()
+	return
+}
+
+func IsEndpointInPeer(ep string) (p *Link, ok bool) {
+	epmu.RLock()
+	p, ok = eps[ep]
+	epmu.RUnlock()
+	return
+}

gold/link/remote.go

@@ -1,48 +0,0 @@
-package link
-
-import (
-	"net"
-	"sync"
-
-	"github.com/fumiama/WireGold/gold/head"
-)
-
-type Identity struct {
-	PubicKey  [32]byte
-	EndPoint  string
-	KeepAlive int64
-	pipe      chan *head.Packet
-}
-
-var (
-	peers   = make(map[string]*Identity)
-	peersmu sync.RWMutex
-)
-
-func AddPeer(peerip string, pubicKey [32]byte, endPoint string, keepAlive int64) (i *Identity) {
-	peerip = net.ParseIP(peerip).String()
-	var ok bool
-	peersmu.RLock()
-	i, ok = peers[peerip]
-	peersmu.RUnlock()
-	if ok {
-		return
-	}
-	i = &Identity{
-		PubicKey:  pubicKey,
-		EndPoint:  endPoint,
-		KeepAlive: keepAlive,
-		pipe:      make(chan *head.Packet, 32),
-	}
-	peersmu.Lock()
-	peers[peerip] = i
-	peersmu.Unlock()
-	return
-}
-
-func IsInPeer(peer string) (p *Identity, ok bool) {
-	peersmu.RLock()
-	p, ok = peers[peer]
-	peersmu.RUnlock()
-	return
-}