X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/18524056e0153c37094cefe07ff8711a95897d6b..ee00c99a75197e3c41bd9bb80e62c1ed9987cbd2:/telnet.c

diff --git a/telnet.c b/telnet.c
index 0d32f8c2..e6ad83e0 100644
--- a/telnet.c
+++ b/telnet.c
@@ -254,11 +254,10 @@ typedef struct telnet_tag {
 
 #define SB_DELTA 1024
 
-static void c_write1(Telnet telnet, int c)
+static void c_write(Telnet telnet, char *buf, int len)
 {
     int backlog;
-    char cc = (char) c;
-    backlog = from_backend(telnet->frontend, 0, &cc, 1);
+    backlog = from_backend(telnet->frontend, 0, buf, len);
     sk_set_frozen(telnet->s, backlog > TELNET_MAX_BACKLOG);
 }
 
@@ -541,6 +540,16 @@ static void process_subneg(Telnet telnet)
 
 static void do_telnet_read(Telnet telnet, char *buf, int len)
 {
+    char *outbuf = NULL;
+    int outbuflen = 0, outbufsize = 0;
+
+#define ADDTOBUF(c) do { \
+    if (outbuflen >= outbufsize) { \
+	outbufsize = outbuflen + 256; \
+        outbuf = sresize(outbuf, outbufsize, char); \
+    } \
+    outbuf[outbuflen++] = (c); \
+} while (0)
 
     while (len--) {
 	int c = (unsigned char) *buf++;
@@ -554,7 +563,7 @@ static void do_telnet_read(Telnet telnet, char *buf, int len)
 		telnet->state = SEENIAC;
 	    else {
 		if (!telnet->in_synch)
-		    c_write1(telnet, c);
+		    ADDTOBUF(c);
 
 #if 1
 		/* I can't get the F***ing winsock to insert the urgent IAC
@@ -591,7 +600,7 @@ static void do_telnet_read(Telnet telnet, char *buf, int len)
 	    } else {
 		/* ignore everything else; print it if it's IAC */
 		if (c == IAC) {
-		    c_write1(telnet, c);
+		    ADDTOBUF(c);
 		}
 		telnet->state = TOP_LEVEL;
 	    }
@@ -641,6 +650,10 @@ static void do_telnet_read(Telnet telnet, char *buf, int len)
 	    break;
 	}
     }
+
+    if (outbuflen)
+	c_write(telnet, outbuf, outbuflen);
+    sfree(outbuf);
 }
 
 static void telnet_log(Plug plug, int type, SockAddr addr, int port,