X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/4d331a77f20f321f867f5907e2ffc06249378881..ec68f1043faae93f56c036077fb320db72914b47:/telnet.c

diff --git a/telnet.c b/telnet.c
index 6618fdf8..97183481 100644
--- a/telnet.c
+++ b/telnet.c
@@ -631,8 +631,11 @@ static int telnet_msg (WPARAM wParam, LPARAM lParam) {
       case FD_CLOSE:
 	{
 	    int clear_of_oob = 1;
-	    if (ioctlsocket (s, SIOCATMARK, &clear_of_oob) < 0 )
-		return -20000-WSAGetLastError();
+
+	    /* Don't check for error return; some shims don't support
+	     * this ioctl.
+	     */
+	    ioctlsocket (s, SIOCATMARK, &clear_of_oob);
 
 	    in_synch = !clear_of_oob;
 
@@ -747,6 +750,12 @@ static void telnet_special (Telnet_Special code) {
 	    send_opt (o_echo.nsend, o_echo.option);
 	}
 	break;
+      case TS_PING: 
+	if (o_they_sga.state == ACTIVE) {
+	    b[1] = NOP; 
+	    s_write (b, 2); 
+	}
+        break;
     }
 }
 
@@ -761,5 +770,6 @@ Backend telnet_backend = {
     telnet_size,
     telnet_special,
     telnet_socket,
-    telnet_sendok
+    telnet_sendok,
+    23
 };