162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
/*
|
|
* 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.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#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, uint16_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);
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
struct telnet_state *
|
|
telnet_connect(struct telnet_state *s, uip_ipaddr_t *addr, uint16_t port)
|
|
{
|
|
struct uip_conn *conn;
|
|
|
|
conn = tcp_connect(addr, uip_htons(port), s);
|
|
if(conn == NULL) {
|
|
return NULL;
|
|
}
|
|
return s;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
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);
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|