revision: proxy support, and map the delete-key

* option to specify list of known proxy IPs; any connections coming
   from these IPs will be forced through the config wizard, to avoid
   mixing up client configs

* the delete-key now works as expected in most clients

r0c/__main__.py

@@ -49,6 +49,7 @@ def optgen(ap, pwd):
     ac.add_argument("-pw", metavar="PWD", type=u, default=pwd, help="admin password")
     ac.add_argument("--ara", action="store_true", help="admin-access requires auth (even for localhost)")
     ac.add_argument("--nsalt", metavar="TXT", type=u, default="lammo/", help="salt for generated nicknames based on IP")
+    ac.add_argument("--proxy", metavar="A,A", type=u, default="", help="comma-sep. list of IPs which are relays to disable config persistence on")
 
     ac = ap.add_argument_group("logging")
     ac.add_argument("--log-rx", action="store_true", help="log incoming traffic from clients")
@@ -197,6 +198,8 @@ class Core(object):
             rap = run_ap
 
         ar = self.ar = rap(argv, pwd)  # type: argparse.Namespace
+        ar.proxy = ar.proxy.split(",")
+
         Util.HEX_WIDTH = ar.hex_w
         Itelnet.init(ar)
 

r0c/ivt100.py

@@ -485,6 +485,9 @@ class VT100_Client(object):
             self.user.admin = self.adr[0] == "127.0.0.1" and not self.ar.ara
 
             try:
+                if self.adr[0] in self.ar.proxy:
+                    raise Exception()
+
                 (
                     ts,
                     nick,
@@ -2884,6 +2887,16 @@ class VT100_Client(object):
                         self.user.exec_cmd("a")
                     elif act == "tab":
                         self.tabcomplete()
+                    elif act == "del":
+                        self.linepos += 1
+                        if self.linepos > len(self.linebuf):
+                            self.linepos = len(self.linebuf)
+                        if self.linepos > 0:
+                            self.linebuf = (
+                                self.linebuf[: self.linepos - 1]
+                                + self.linebuf[self.linepos :]
+                            )
+                            self.linepos -= 1
                     else:
                         print("unimplemented action: {0}".format(act))