telnet: Don't quote IAC for DONT and WONT replies

Since commit 48f4fd57802b ("telnet: Quote IAC on sending") ios_printf
quotes IAC characters. For the purpose of negotiating connection parameter
this is wrong however. So use a raw write and rename the function
accordingly.

Fixes: 48f4fd57802b ("telnet: Quote IAC on sending")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 4 insertions, 4 deletions

diff --git a/telnet.c b/telnet.c
index 0d8c2a3..8a003a7 100644
--- a/telnet.c
+++ b/telnet.c
@@ -29,7 +29,7 @@
 
 #include "microcom.h"
 
-static int ios_printf(struct ios_ops *ios, const char *format, ...)
+static int telnet_printf(struct ios_ops *ios, const char *format, ...)
 {
 	char buf[20];
 	int size, written = 0;
@@ -49,7 +49,7 @@ static int ios_printf(struct ios_ops *ios, const char *format, ...)
 	}
 
 	while (written < size) {
-		ret = ios->write(ios, buf + written, size - written);
+		ret = write(ios->fd, buf + written, size - written);
 		if (ret < 0)
 			return ret;
 
@@ -343,7 +343,7 @@ static int handle_command(struct ios_ops *ios, unsigned char *buf, int len)
 		} else {
 			/* unknown/unimplemented option -> DONT */
 			dbg_printf(" -> DONT\n");
-			ios_printf(ios, "%c%c%c", IAC, DONT, buf[2]);
+			telnet_printf(ios, "%c%c%c", IAC, DONT, buf[2]);
 		}
 		return 3;
 
@@ -371,7 +371,7 @@ static int handle_command(struct ios_ops *ios, unsigned char *buf, int len)
 		} else {
 			/* Oh, cannot handle that one, so send a WONT */
 			dbg_printf(" -> WONT\n");
-			ios_printf(ios, "%c%c%c", IAC, WONT, buf[2]);
+			telnet_printf(ios, "%c%c%c", IAC, WONT, buf[2]);
 		}
 		return 3;