Handle packets with no type byte by returning SSH_MSG_UNIMPLEMENTED.

[PuTTY.git] / windows / winser.c

diff --git a/windows/winser.c b/windows/winser.c
index 3f1326dba16badaabc4a4ca503b0d027f97dfa69..de9e61b480f91b6a9a5f6ccab81bf5142956f2bf 100644 (file)
--- a/windows/winser.c
+++ b/windows/winser.c
@@ -453,6 +453,7 @@ Backend serial_backend = {
     serial_provide_logctx,
     serial_unthrottle,
     serial_cfg_info,
+    NULL /* test_for_upstream */,
     "serial",
     PROT_SERIAL,
     0