make removePeers work for TCP connections and minor admin cleanup

src/yggdrasil/admin.go

@@ -5,6 +5,7 @@ import "os"
 import "bytes"
 import "errors"
 import "fmt"
+import "net/url"
 import "sort"
 import "strings"
 import "strconv"
@@ -57,18 +58,18 @@ func (a *admin) init(c *Core, listenaddr string) {
 	a.addHandler("getSessions", nil, func(out *[]byte, _ ...string) {
 		*out = []byte(a.printInfos(a.getData_getSessions()))
 	})
-	a.addHandler("addPeer", []string{"<peer>"}, func(out *[]byte, saddr ...string) {
+	a.addHandler("addPeer", []string{"<port>"}, func(out *[]byte, saddr ...string) {
 		if a.addPeer(saddr[0]) == nil {
 			*out = []byte("Adding peer: " + saddr[0] + "\n")
 		} else {
 			*out = []byte("Failed to add peer: " + saddr[0] + "\n")
 		}
 	})
-	a.addHandler("removePeer", []string{"<peer>"}, func(out *[]byte, saddr ...string) {
-		if a.removePeer(saddr[0]) == nil {
-			*out = []byte("Removing peer: " + saddr[0] + "\n")
+	a.addHandler("removePeer", []string{"<port>"}, func(out *[]byte, sport ...string) {
+		if a.removePeer(sport[0]) == nil {
+			*out = []byte("Removing peer: " + sport[0] + "\n")
 		} else {
-			*out = []byte("Failed to remove peer: " + saddr[0] + "\n")
+			*out = []byte("Failed to remove peer: " + sport[0] + "\n")
 		}
 	})
 	a.addHandler("setTunTap", []string{"<ifname|auto|none>", "[<tun|tap>]", "[<mtu>]"}, func(out *[]byte, ifparams ...string) {
@@ -191,60 +192,43 @@ func (a *admin) printInfos(infos []admin_nodeInfo) string {
 	return strings.Join(out, "\n")
 }
 
-func (a *admin) addPeer(p string) error {
-	pAddr := p
-	if p[:4] == "tcp:" || p[:4] == "udp:" {
-		pAddr = p[4:]
-	}
-	switch {
-	case len(p) >= 4 && p[:4] == "udp:":
-		// Connect to peer over UDP
-		udpAddr, err := net.ResolveUDPAddr("udp", pAddr)
-		if err != nil {
-			return err
+func (a *admin) addPeer(addr string) error {
+	u, err := url.Parse(addr)
+	if err == nil {
+		switch strings.ToLower(u.Scheme) {
+		case "tcp":
+			a.core.DEBUG_addTCPConn(u.Host)
+		case "udp":
+			a.core.DEBUG_maybeSendUDPKeys(u.Host)
+		case "socks":
+			a.core.DEBUG_addSOCKSConn(u.Host, u.Path[1:])
+		default:
+			return errors.New("invalid peer: " + addr)
 		}
-		var addr connAddr
-		addr.fromUDPAddr(udpAddr)
-		a.core.udp.mutex.RLock()
-		_, isIn := a.core.udp.conns[addr]
-		a.core.udp.mutex.RUnlock()
-		if !isIn {
-			a.core.udp.sendKeys(addr)
+	} else {
+		// no url scheme provided
+		addr = strings.ToLower(addr)
+		if strings.HasPrefix(addr, "udp:") {
+			a.core.DEBUG_maybeSendUDPKeys(addr[4:])
+			return nil
+		} else {
+			if strings.HasPrefix(addr, "tcp:") {
+				addr = addr[4:]
+			}
+			a.core.DEBUG_addTCPConn(addr)
+			return nil
 		}
-		return nil
-	case len(p) >= 4 && p[:4] == "tcp:":
-	default:
-		// Connect to peer over TCP
-		_, err := net.ResolveTCPAddr("tcp", pAddr)
-		if err != nil {
-			return err
-		}
-		a.core.tcp.call(p)
+		return errors.New("invalid peer: " + addr)
 	}
 	return nil
 }
 
 func (a *admin) removePeer(p string) error {
-	pAddr := p
-	if p[:4] == "tcp:" || p[:4] == "udp:" {
-		pAddr = p[4:]
-	}
-	switch {
-	case len(p) >= 4 && p[:4] == "udp:":
-		// Connect to peer over UDP
-		udpAddr, err := net.ResolveUDPAddr("udp", pAddr)
-		if err != nil {
-			return err
-		}
-		var addr connAddr
-		addr.fromUDPAddr(udpAddr)
-		a.core.udp.sendClose(addr)
-		return nil
-	case len(p) >= 4 && p[:4] == "tcp:":
-	default:
-		// Connect to peer over TCP
-		return errors.New("Removing TCP peer not yet supported")
+	iport, err := strconv.Atoi(p)
+	if err != nil {
+		return err
 	}
+	a.core.peers.removePeer(switchPort(iport))
 	return nil
 }
 

src/yggdrasil/debug.go

@@ -12,9 +12,7 @@ import "golang.org/x/net/proxy"
 
 import "fmt"
 import "net"
-import "net/url"
 import "log"
-import "strings"
 import "regexp"
 
 // Core
@@ -313,29 +311,9 @@ func (c *Core) DEBUG_maybeSendUDPKeys(saddr string) {
 ////////////////////////////////////////////////////////////////////////////////
 
 func (c *Core) DEBUG_addPeer(addr string) {
-	u, err := url.Parse(addr)
-	if err == nil {
-		switch strings.ToLower(u.Scheme) {
-		case "tcp":
-			c.DEBUG_addTCPConn(u.Host)
-		case "udp":
-			c.DEBUG_maybeSendUDPKeys(u.Host)
-		case "socks":
-			c.DEBUG_addSOCKSConn(u.Host, u.Path[1:])
-		default:
-			panic("invalid peer: " + addr)
-		}
-	} else {
-		// no url scheme provided
-		addr = strings.ToLower(addr)
-		if strings.HasPrefix(addr, "udp:") {
-			c.DEBUG_maybeSendUDPKeys(addr[4:])
-		} else {
-			if strings.HasPrefix(addr, "tcp:") {
-				addr = addr[4:]
-			}
-			c.DEBUG_addTCPConn(addr)
-		}
+	err := c.admin.addPeer(addr)
+	if err != nil {
+		panic(err)
 	}
 }
 

src/yggdrasil/peer.go

@@ -73,6 +73,8 @@ type peer struct {
 	//  Specifically, processing switch messages, signing, and verifying sigs
 	//  Resets at the start of each tick
 	throttle uint8
+	// Called when a peer is removed, to close the underlying connection, or via admin api
+	close func()
 }
 
 const peer_Throttle = 1
@@ -123,6 +125,26 @@ func (ps *peers) newPeer(box *boxPubKey,
 	return &p
 }
 
+func (ps *peers) removePeer(port switchPort) {
+	// TODO? store linkIn in the peer struct, close it here? (once)
+	if port == 0 {
+		return
+	} // Can't remove self peer
+	ps.mutex.Lock()
+	oldPorts := ps.getPorts()
+	p, isIn := oldPorts[port]
+	newPorts := make(map[switchPort]*peer)
+	for k, v := range oldPorts {
+		newPorts[k] = v
+	}
+	delete(newPorts, port)
+	ps.putPorts(newPorts)
+	ps.mutex.Unlock()
+	if isIn && p.close != nil {
+		p.close()
+	}
+}
+
 func (p *peer) linkLoop(in <-chan []byte) {
 	ticker := time.NewTicker(time.Second)
 	defer ticker.Stop()

src/yggdrasil/tcp.go

@@ -238,19 +238,12 @@ func (iface *tcpInterface) handler(sock net.Conn) {
 			util_putBytes(msg)
 		}
 	}
+	p.close = func() { sock.Close() }
 	setNoDelay(sock, true)
 	go p.linkLoop(linkIn)
 	defer func() {
 		// Put all of our cleanup here...
-		p.core.peers.mutex.Lock()
-		oldPorts := p.core.peers.getPorts()
-		newPorts := make(map[switchPort]*peer)
-		for k, v := range oldPorts {
-			newPorts[k] = v
-		}
-		delete(newPorts, p.port)
-		p.core.peers.putPorts(newPorts)
-		p.core.peers.mutex.Unlock()
+		p.core.peers.removePeer(p.port)
 		close(linkIn)
 	}()
 	them, _, _ := net.SplitHostPort(sock.RemoteAddr().String())

src/yggdrasil/udp.go

@@ -115,20 +115,11 @@ func (iface *udpInterface) startConn(info *connInfo) {
 		iface.mutex.Lock()
 		delete(iface.conns, info.addr)
 		iface.mutex.Unlock()
-		iface.core.peers.mutex.Lock()
-		oldPorts := iface.core.peers.getPorts()
-		newPorts := make(map[switchPort]*peer)
-		for k, v := range oldPorts {
-			newPorts[k] = v
-		}
-		delete(newPorts, info.peer.port)
-		iface.core.peers.putPorts(newPorts)
-		iface.core.peers.mutex.Unlock()
+		iface.core.peers.removePeer(info.peer.port)
 		close(info.linkIn)
 		close(info.keysIn)
 		close(info.closeIn)
 		close(info.out)
-		iface.sendClose(info.addr)
 		iface.core.log.Println("Removing peer:", info.name)
 	}()
 	for {
@@ -296,6 +287,7 @@ func (iface *udpInterface) handleKeys(msg []byte, addr connAddr) {
 			}
 		}()
 		//*/
+		conn.peer.close = func() { iface.sendClose(conn.addr) }
 		iface.mutex.Lock()
 		iface.conns[addr] = conn
 		iface.mutex.Unlock()