Accept some golint suggestions (#690)

* Fixed some linter issues

* Simplified isBetter method

* Accept some linter suggestions

* Fix typo

Co-authored-by: klesomik <klesomiks@gmail.com>
Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>

src/yggdrasil/conn.go

@@ -167,10 +167,9 @@ func (c *Conn) _getDeadlineCancellation(t *time.Time) (util.Cancellation, bool)
 		// A deadline is set, so return a Cancellation that uses it
 		c := util.CancellationWithDeadline(c.session.cancel, *t)
 		return c, true
-	} else {
-		// No deadline was set, so just return the existing cancellation and a dummy value
-		return c.session.cancel, false
 	}
+	// No deadline was set, so just return the existing cancellation and a dummy value
+	return c.session.cancel, false
 }
 
 // SetReadCallback allows you to specify a function that will be called whenever
@@ -225,9 +224,8 @@ func (c *Conn) readNoCopy() ([]byte, error) {
 	case <-cancel.Finished():
 		if cancel.Error() == util.CancellationTimeoutError {
 			return nil, ConnError{errors.New("read timeout"), true, false, false, 0}
-		} else {
-			return nil, ConnError{errors.New("session closed"), false, false, true, 0}
 		}
+		return nil, ConnError{errors.New("session closed"), false, false, true, 0}
 	case bs := <-c.readBuffer:
 		return bs, nil
 	}

src/yggdrasil/link.go

@@ -253,17 +253,16 @@ func (intf *linkInterface) handler() error {
 			<-oldIntf.closed
 		}
 		return nil
-	} else {
-		intf.closed = make(chan struct{})
-		intf.link.interfaces[intf.info] = intf
-		defer func() {
-			intf.link.mutex.Lock()
-			delete(intf.link.interfaces, intf.info)
-			intf.link.mutex.Unlock()
-			close(intf.closed)
-		}()
-		intf.link.core.log.Debugln("DEBUG: registered interface for", intf.name)
 	}
+	intf.closed = make(chan struct{})
+	intf.link.interfaces[intf.info] = intf
+	defer func() {
+		intf.link.mutex.Lock()
+		delete(intf.link.interfaces, intf.info)
+		intf.link.mutex.Unlock()
+		close(intf.closed)
+	}()
+	intf.link.core.log.Debugln("DEBUG: registered interface for", intf.name)
 	intf.link.mutex.Unlock()
 	// Create peer
 	shared := crypto.GetSharedKey(myLinkPriv, &meta.link)

src/yggdrasil/nodeinfo.go

@@ -136,15 +136,15 @@ func (m *nodeinfo) _setNodeInfo(given interface{}, privacy bool) error {
 			newnodeinfo[key] = value
 		}
 	}
-	if newjson, err := json.Marshal(newnodeinfo); err == nil {
+	newjson, err := json.Marshal(newnodeinfo)
+	if err == nil {
 		if len(newjson) > 16384 {
 			return errors.New("NodeInfo exceeds max length of 16384 bytes")
 		}
 		m.myNodeInfo = newjson
 		return nil
-	} else {
-		return err
 	}
+	return err
 }
 
 // Add nodeinfo into the cache for a node

src/yggdrasil/switch.go

@@ -532,7 +532,6 @@ func (t *switchTable) unlockedHandleMsg(msg *switchMsg, fromPort switchPort, rep
 	if true || doUpdate {
 		t.updater.Store(&sync.Once{})
 	}
-	return
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -615,9 +614,8 @@ func (t *switchTable) portIsCloser(dest []byte, port switchPort) bool {
 		theirDist := info.locator.dist(dest)
 		myDist := table.self.dist(dest)
 		return theirDist < myDist
-	} else {
-		return false
 	}
+	return false
 }
 
 // Get the coords of a packet without decoding

src/yggdrasil/tcp.go

@@ -205,10 +205,9 @@ func (t *tcp) listener(l *TcpListener, listenaddr string) {
 		t.mutex.Unlock()
 		l.Listener.Close()
 		return
-	} else {
-		t.listeners[listenaddr] = l
-		t.mutex.Unlock()
 	}
+	t.listeners[listenaddr] = l
+	t.mutex.Unlock()
 	// And here we go!
 	defer func() {
 		t.link.core.log.Infoln("Stopping TCP listener on:", l.Listener.Addr().String())
@@ -375,9 +374,8 @@ func (t *tcp) handler(sock net.Conn, incoming bool, options tcpOptions) {
 		if sock, err = options.upgrade.upgrade(sock); err != nil {
 			t.link.core.log.Errorln("TCP handler upgrade failed:", err)
 			return
-		} else {
-			upgraded = true
 		}
+		upgraded = true
 	}
 	stream := stream{}
 	stream.init(sock)

src/yggdrasil/version.go

@@ -28,11 +28,11 @@ func version_getBaseMetadata() version_metadata {
 	}
 }
 
-// Gest the length of the metadata for this version, used to know how many bytes to read from the start of a connection.
+// Gets the length of the metadata for this version, used to know how many bytes to read from the start of a connection.
 func version_getMetaLength() (mlen int) {
 	mlen += 4                   // meta
-	mlen += 1                   // ver, as long as it's < 127, which it is in this version
-	mlen += 1                   // minorVer, as long as it's < 127, which it is in this version
+	mlen++                      // ver, as long as it's < 127, which it is in this version
+	mlen++                      // minorVer, as long as it's < 127, which it is in this version
 	mlen += crypto.BoxPubKeyLen // box
 	mlen += crypto.SigPubKeyLen // sig
 	mlen += crypto.BoxPubKeyLen // link