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Diffstat (limited to 'uip/apps/telnet/telnet.c')
-rw-r--r--uip/apps/telnet/telnet.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/uip/apps/telnet/telnet.c b/uip/apps/telnet/telnet.c
new file mode 100644
index 0000000..f72b6fc
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+++ b/uip/apps/telnet/telnet.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2002, Adam Dunkels.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This file is part of the uIP TCP/IP stack.
+ *
+ * $Id: telnet.c,v 1.1.2.3 2003/10/06 11:20:45 adam Exp $
+ *
+ */
+
+#include "uip.h"
+
+#include "telnet.h"
+
+#ifndef NULL
+#define NULL (void *)0
+#endif /* NULL */
+
+#define FLAG_CLOSE 1
+#define FLAG_ABORT 2
+/*-----------------------------------------------------------------------------------*/
+unsigned char
+telnet_send(struct telnet_state *s, char *text, u16_t len)
+{
+ if(s->text != NULL) {
+ return 1;
+ }
+ s->text = text;
+ s->textlen = len;
+ s->sentlen = 0;
+ return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+unsigned char
+telnet_close(struct telnet_state *s)
+{
+ s->flags = FLAG_CLOSE;
+ if(s->text != NULL) {
+ return 1;
+ }
+ return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+unsigned char
+telnet_abort(struct telnet_state *s)
+{
+ s->flags = FLAG_ABORT;
+ if(s->text != NULL) {
+ return 1;
+ }
+ return 0;
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+acked(struct telnet_state *s)
+{
+ s->textlen -= s->sentlen;
+ if(s->textlen == 0) {
+ s->text = NULL;
+ telnet_sent(s);
+ } else {
+ s->text += s->sentlen;
+ }
+ s->sentlen = 0;
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+senddata(struct telnet_state *s)
+{
+ if(s->text == NULL) {
+ uip_send(s->text, 0);
+ return;
+ }
+ if(s->textlen > uip_mss()) {
+ s->sentlen = uip_mss();
+ } else {
+ s->sentlen = s->textlen;
+ }
+ uip_send(s->text, s->sentlen);
+}
+/*-----------------------------------------------------------------------------------*/
+void telnet_app(void)
+{
+ struct telnet_state *s = (struct telnet_state *)uip_conn->appstate;
+
+ if(uip_connected()) {
+ s->flags = 0;
+ telnet_connected(s);
+ senddata(s);
+ return;
+ }
+
+ if(uip_closed()) {
+ telnet_closed(s);
+ }
+
+ if(uip_aborted()) {
+ telnet_aborted(s);
+ }
+ if(uip_timedout()) {
+ telnet_timedout(s);
+ }
+
+
+ if(s->flags & FLAG_CLOSE) {
+ uip_close();
+ return;
+ }
+ if(s->flags & FLAG_ABORT) {
+ uip_abort();
+ return;
+ }
+ if(uip_acked()) {
+ acked(s);
+ }
+ if(uip_newdata()) {
+ telnet_newdata(s, (char *)uip_appdata, uip_datalen());
+ }
+ if(uip_rexmit() ||
+ uip_newdata() ||
+ uip_acked()) {
+ senddata(s);
+ } else if(uip_poll()) {
+ senddata(s);
+ }
+}
+/*-----------------------------------------------------------------------------------*/