X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/6f34e365eed04c1b4ebcf6d90511dd9e4400880a..fe50e8140a2dbb3ba357a0ab777f34e07d568c23:/telnet.c

diff --git a/telnet.c b/telnet.c
index 5e6ba3c2..7b6c0bf6 100644
--- a/telnet.c
+++ b/telnet.c
@@ -1,7 +1,13 @@
 #include <windows.h>
 #include <stdio.h>
 #include <stdlib.h>
+#ifndef AUTO_WINSOCK
+#ifdef WINSOCK_TWO
+#include <winsock2.h>
+#else
 #include <winsock.h>
+#endif
+#endif
 
 #include "putty.h"
 
@@ -165,6 +171,11 @@ static void s_write (void *buf, int len) {
     try_write();
 }
 
+static void c_write1(int c) {
+    char cc = (char)c;
+    from_backend(0, &cc, 1);
+}
+
 static void log_option (char *sender, int cmd, int option) {
     char buf[50];
     sprintf(buf, "%s:\t%s %s", sender,
@@ -625,8 +636,11 @@ 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;
 
@@ -741,6 +755,12 @@ 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;
     }
 }
 
@@ -755,5 +775,6 @@ Backend telnet_backend = {
     telnet_size,
     telnet_special,
     telnet_socket,
-    telnet_sendok
+    telnet_sendok,
+    23
 };