From: Jeremy Stanley <fungi@yuggoth.org>
Date: Sat, 30 Jun 2018 13:42:40 +0000 (+0000)
Subject: Filter non-ASCII input when not in binary mode
X-Git-Tag: 0.0.1~76
X-Git-Url: https://mudpy.org/gitweb?p=mudpy.git;a=commitdiff_plain;h=8b2a788b00f495b4d05d6e2e8b7ce9f3bb63b932

Filter non-ASCII input when not in binary mode

If the client does not have binary send enabled per prior Telnet
option negotiation, filter for non-ASCII characters. This fixes a
bug where previously only binary mode senders were checked for
non-ASCII input and 7-bit senders were checked for non-UTF-8 input
rather than the other way around.
---

diff --git a/mudpy/misc.py b/mudpy/misc.py
index 439e00a..009de29 100644
--- a/mudpy/misc.py
+++ b/mudpy/misc.py
@@ -883,8 +883,8 @@ class User:
                 line = line.strip()
 
                 # log non-printable characters remaining
-                if mudpy.telnet.is_enabled(self, mudpy.telnet.TELOPT_BINARY,
-                                           mudpy.telnet.HIM):
+                if not mudpy.telnet.is_enabled(
+                        self, mudpy.telnet.TELOPT_BINARY, mudpy.telnet.HIM):
                     asciiline = bytes([x for x in line if 32 <= x <= 126])
                     if line != asciiline:
                         logline = "Non-ASCII characters from "
diff --git a/mudpy/tests/selftest.py b/mudpy/tests/selftest.py
index bf32434..e120e70 100644
--- a/mudpy/tests/selftest.py
+++ b/mudpy/tests/selftest.py
@@ -151,9 +151,9 @@ test_admin_setup = (
 test_telnet_iac = (
     # Send a double (escaped) IAC byte within other text, which should get
     # unescaped and deduplicated to a single \xff in the buffer and then
-    # the line of input discarded as a non-UTF-8 sequence
+    # the line of input discarded as a non-ASCII sequence
     (2, "> ", b"say argle\xff\xffbargle\r\n"),
-    (2, r"Non-UTF-8 sequence from admin: b'say argle\\xffbargle'.*> ", ""),
+    (2, r"Non-ASCII characters from admin: b'say argle\\xffbargle'.*> ", ""),
 )
 
 test_telnet_unknown = (