grumble: add Debugf print method to Client and Server.

client.go

@@ -91,6 +91,11 @@ type Client struct {
 	PluginIdentity  string
 }
 
+// Debugf implements debug-level printing for Clients.
+func (client *Client) Debugf(format string, v ...interface{}) {
+	client.Printf(format, v...)
+}
+
 // Is the client a registered user?
 func (client *Client) IsRegistered() bool {
 	return client.user != nil
@@ -627,6 +632,7 @@ func (client *Client) sendChannelTree(channel *Channel) {
 
 // Try to do a crypto resync
 func (client *Client) cryptResync() {
+	client.Debugf("requesting crypt resync")
 	goodElapsed := time.Now().Unix() - client.crypt.LastGoodTime
 	if goodElapsed > 5 {
 		requestElapsed := time.Now().Unix() - client.lastResync

server.go

@@ -153,6 +153,11 @@ func NewServer(id int64) (s *Server, err error) {
 	return
 }
 
+// Debugf implements debug-level printing for Servers.
+func (server *Server) Debugf(format string, v ...interface{}) {
+	server.Printf(format, v...)
+}
+
 // Get a pointer to the root channel
 func (server *Server) RootChannel() *Channel {
 	root, exists := server.Channels[0]
@@ -996,6 +1001,7 @@ func (server *Server) handleUdpPacket(udpaddr *net.UDPAddr, buf []byte) {
 	if ok {
 		err := client.crypt.Decrypt(plain, buf)
 		if err != nil {
+			client.Debugf("unable to decrypt incoming packet, requesting resync: %v", err)
 			client.cryptResync()
 			return
 		}
@@ -1006,6 +1012,7 @@ func (server *Server) handleUdpPacket(udpaddr *net.UDPAddr, buf []byte) {
 		for _, client := range hostclients {
 			err := client.crypt.Decrypt(plain[0:], buf)
 			if err != nil {
+				client.Debugf("unable to decrypt incoming packet, requesting resync: %v", err)
 				client.cryptResync()
 				return
 			} else {