support socks proxy in peer url and decouple explicit tor/i2p routing

src/yggdrasil/core.go

@@ -19,7 +19,6 @@ type Core struct {
 	tun         tunDevice
 	admin       admin
 	searches    searches
-	Dialer      Dialer
 	tcp         *tcpInterface
 	udp         *udpInterface
 	log         *log.Logger

src/yggdrasil/debug.go

@@ -8,9 +8,13 @@ package yggdrasil
 
 import _ "golang.org/x/net/ipv6" // TODO put this somewhere better
 
+import "golang.org/x/net/proxy"
+
 import "fmt"
 import "net"
+import "net/url"
 import "log"
+import "strings"
 import "regexp"
 
 // Core
@@ -307,6 +311,54 @@ func (c *Core) DEBUG_maybeSendUDPKeys(saddr string) {
 
 ////////////////////////////////////////////////////////////////////////////////
 
+func (c *Core) DEBUG_addPeer(addr string) {
+	u, err := url.Parse(addr)
+	if err != nil {
+		panic(err)
+	}
+	if len(u.Opaque) == 0 {
+		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)
+		}
+	}
+}
+
+func (c *Core) DEBUG_addSOCKSConn(socksaddr, peeraddr string) {
+	go func() {
+		dialer, err := proxy.SOCKS5("tcp", socksaddr, nil, proxy.Direct)
+		if err == nil {
+			conn, err := dialer.Dial("tcp", peeraddr)
+			if err == nil {
+				c.tcp.callWithConn(&wrappedConn{
+					c: conn,
+					raddr: &wrappedAddr{
+						network: "tcp",
+						addr:    peeraddr,
+					},
+				})
+			}
+		}
+	}()
+}
+
 //*
 func (c *Core) DEBUG_setupAndStartGlobalTCPInterface(addrport string) {
 	iface := tcpInterface{}

src/yggdrasil/dial.go

@@ -1,23 +1,10 @@
 package yggdrasil
 
 import (
-	"errors"
-	"golang.org/x/net/proxy"
 	"net"
-	"strings"
 	"time"
-	"yggdrasil/config"
 )
 
-type Dialer = proxy.Dialer
-
-// muxedDialer implements proxy.Dialer (aka Dialer)
-type muxedDialer struct {
-	conf   config.NetConfig
-	tor    Dialer
-	direct Dialer
-}
-
 // wrappedConn implements net.Conn
 type wrappedConn struct {
 	c     net.Conn
@@ -69,39 +56,3 @@ func (c *wrappedConn) LocalAddr() net.Addr {
 func (c *wrappedConn) RemoteAddr() net.Addr {
 	return c.raddr
 }
-
-func (d *muxedDialer) Dial(network, addr string) (net.Conn, error) {
-	host, _, _ := net.SplitHostPort(addr)
-	if d.conf.Tor.UseForAll || strings.HasSuffix(host, ".onion") {
-		if !d.conf.Tor.Enabled {
-			return nil, errors.New("tor not enabled")
-		}
-		c, err := d.tor.Dial(network, addr)
-		if err == nil {
-			c = &wrappedConn{
-				c: c,
-				raddr: &wrappedAddr{
-					network: network,
-					addr:    addr,
-				},
-			}
-		}
-		return c, err
-	} else {
-		return d.direct.Dial(network, addr)
-	}
-}
-
-// NewDialer creates a Dialer from a NetConfig
-func NewDialer(c config.NetConfig) Dialer {
-	if c.Tor.Enabled {
-		tor, _ := proxy.SOCKS5("tcp", c.Tor.SocksAddr, nil, proxy.Direct)
-		return &muxedDialer{
-			conf:   c,
-			tor:    tor,
-			direct: proxy.Direct,
-		}
-	} else {
-		return proxy.Direct
-	}
-}

src/yggdrasil/tcp.go

@@ -66,6 +66,26 @@ func (iface *tcpInterface) listener() {
 	}
 }
 
+func (iface *tcpInterface) callWithConn(conn net.Conn) {
+	go func() {
+		raddr := conn.RemoteAddr().String()
+		iface.mutex.Lock()
+		_, isIn := iface.calls[raddr]
+		iface.mutex.Unlock()
+		if !isIn {
+			iface.mutex.Lock()
+			iface.calls[raddr] = struct{}{}
+			iface.mutex.Unlock()
+			defer func() {
+				iface.mutex.Lock()
+				delete(iface.calls, raddr)
+				iface.mutex.Unlock()
+			}()
+			iface.handler(conn)
+		}
+	}()
+}
+
 func (iface *tcpInterface) call(saddr string) {
 	go func() {
 		quit := false
@@ -82,7 +102,7 @@ func (iface *tcpInterface) call(saddr string) {
 		}
 		iface.mutex.Unlock()
 		if !quit {
-			conn, err := iface.core.Dialer.Dial("tcp", saddr)
+			conn, err := net.Dial("tcp", saddr)
 			if err != nil {
 				return
 			}

yggdrasil.go

@@ -59,8 +59,6 @@ func (n *node) init(cfg *nodeConfig, logger *log.Logger) {
 	}
 	n.core.DEBUG_setIfceExpr(ifceExpr)
 
-	n.core.Dialer = yggdrasil.NewDialer(cfg.Net)
-
 	logger.Println("Starting interface...")
 	n.core.DEBUG_setupAndStartGlobalTCPInterface(cfg.Listen) // Listen for peers on TCP
 	n.core.DEBUG_setupAndStartGlobalUDPInterface(cfg.Listen) // Also listen on UDP, TODO allow separate configuration for ip/port to listen on each of these
@@ -74,14 +72,7 @@ func (n *node) init(cfg *nodeConfig, logger *log.Logger) {
 		}
 		for {
 			for _, p := range cfg.Peers {
-				switch {
-				case len(p) >= 4 && p[:4] == "udp:":
-					n.core.DEBUG_maybeSendUDPKeys(p[4:])
-				case len(p) >= 4 && p[:4] == "tcp:":
-					n.core.DEBUG_addTCPConn(p[4:])
-				default:
-					n.core.DEBUG_addTCPConn(p)
-				}
+				n.core.DEBUG_addPeer(p)
 				time.Sleep(time.Second)
 			}
 			time.Sleep(time.Minute)