Import of the contiki-2.x development code from the SICS internal CVS server

apps/telnet/telnet.c

@@ -0,0 +1,152 @@
+/*
+ * 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 2006/06/17 22:41:13 adamdunkels Exp $
+ *
+ */
+
+#include "contiki-net.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 *ts)
+{
+  struct telnet_state *s = (struct telnet_state *)ts;
+    
+  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);
+  }
+}
+/*-----------------------------------------------------------------------------------*/