Added support for ERR_TLS_ACTIVE.

@@ -377,6 +377,10 @@ pop3d_mainloop (int fd, FILE *infile, FILE *outfile)
 	pop3d_outf ("-ERR " TOO_LONG "\r\n");
       else if (status == ERR_FILE)
 	pop3d_outf ("-ERR " FILE_EXP "\r\n");
+#ifdef WITH_TLS
+      else if (status == ERR_TLS_ACTIVE)
+	pop3d_outf ("-ERR " TLS_ACTIVE "\r\n");
+#endif /* WITH_TLS */
       else
 	pop3d_outf ("-ERR unknown error\r\n");
 

@@ -59,6 +59,9 @@
 /* An error occured when expunging.  */
 #define FILE_EXP        "Some deleted messages not removed"
 
+/* Command not permitted when TLS active. */
+#define TLS_ACTIVE      "Command not permitted when TLS active"
+
 /* APOP password file, without .db or .passwd, which are added based on file
    type automatically */
 #define APOP_PASSFILE_NAME "apop"
@@ -167,6 +170,7 @@
 #define ERR_TIMEOUT	14
 #define ERR_UNKNOWN	15
 #define ERR_MBOX_SYNC   16
+#define ERR_TLS_ACTIVE 17
 
 extern mailbox_t mbox;
 extern int state;

@@ -30,6 +30,9 @@ pop3d_stls (const char *arg)
   if (state != AUTHORIZATION)
     return ERR_WRONG_STATE;
 
+  if (tls_done)
+    return ERR_TLS_ACTIVE;
+
   pop3d_outf ("+OK Begin TLS negotiation\r\n");
   pop3d_flush_output ();