mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-30 19:29:45 +00:00
400 lines
9.2 KiB
C
400 lines
9.2 KiB
C
|
/*
|
||
|
* Copyright (c) 2003, 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 Contiki desktop OS.
|
||
|
*
|
||
|
* $Id: telnetd.c,v 1.1 2006/06/17 22:41:13 adamdunkels Exp $
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
#include "contiki-net.h"
|
||
|
#include "lib/petsciiconv.h"
|
||
|
#include "contiki-lib.h"
|
||
|
|
||
|
#include "shell.h"
|
||
|
#include "telnetd.h"
|
||
|
|
||
|
|
||
|
#include <string.h>
|
||
|
|
||
|
#define ISO_nl 0x0a
|
||
|
#define ISO_cr 0x0d
|
||
|
|
||
|
#define XSIZE 36
|
||
|
#define YSIZE 12
|
||
|
|
||
|
PROCESS(telnetd_process, "Shell server");
|
||
|
|
||
|
#ifndef TELNETD_CONF_LINELEN
|
||
|
#define TELNETD_CONF_LINELEN 40
|
||
|
#endif
|
||
|
#ifndef TELNETD_CONF_NUMLINES
|
||
|
#define TELNETD_CONF_NUMLINES 16
|
||
|
#endif
|
||
|
|
||
|
struct telnetd_line {
|
||
|
char line[TELNETD_CONF_LINELEN];
|
||
|
};
|
||
|
MEMB(linemem, struct telnetd_line, TELNETD_CONF_NUMLINES);
|
||
|
|
||
|
struct telnetd_state {
|
||
|
char *lines[TELNETD_CONF_NUMLINES];
|
||
|
char buf[TELNETD_CONF_LINELEN];
|
||
|
char bufptr;
|
||
|
u8_t numsent;
|
||
|
u8_t state;
|
||
|
#define STATE_NORMAL 0
|
||
|
#define STATE_IAC 1
|
||
|
#define STATE_WILL 2
|
||
|
#define STATE_WONT 3
|
||
|
#define STATE_DO 4
|
||
|
#define STATE_DONT 5
|
||
|
|
||
|
#define STATE_CLOSE 6
|
||
|
};
|
||
|
static struct telnetd_state s;
|
||
|
|
||
|
#define TELNET_IAC 255
|
||
|
#define TELNET_WILL 251
|
||
|
#define TELNET_WONT 252
|
||
|
#define TELNET_DO 253
|
||
|
#define TELNET_DONT 254
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static char *
|
||
|
alloc_line(void)
|
||
|
{
|
||
|
return memb_alloc(&linemem);
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
dealloc_line(char *line)
|
||
|
{
|
||
|
memb_free(&linemem, line);
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
void
|
||
|
shell_quit(char *str)
|
||
|
{
|
||
|
s.state = STATE_CLOSE;
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
void
|
||
|
telnetd_quit(void)
|
||
|
{
|
||
|
#if TELNETD_CONF_GUI
|
||
|
telnetd_gui_quit();
|
||
|
#endif /* TELNETD_CONF_GUI */
|
||
|
process_exit(&telnetd_process);
|
||
|
LOADER_UNLOAD();
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
sendline(char *line)
|
||
|
{
|
||
|
static unsigned int i;
|
||
|
|
||
|
for(i = 0; i < TELNETD_CONF_NUMLINES; ++i) {
|
||
|
if(s.lines[i] == NULL) {
|
||
|
s.lines[i] = line;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
if(i == TELNETD_CONF_NUMLINES) {
|
||
|
dealloc_line(line);
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
void
|
||
|
shell_prompt(char *str)
|
||
|
{
|
||
|
char *line;
|
||
|
line = alloc_line();
|
||
|
if(line != NULL) {
|
||
|
strncpy(line, str, TELNETD_CONF_LINELEN);
|
||
|
petsciiconv_toascii(line, TELNETD_CONF_LINELEN);
|
||
|
sendline(line);
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
void
|
||
|
shell_output(char *str1, char *str2)
|
||
|
{
|
||
|
static unsigned len;
|
||
|
char *line;
|
||
|
|
||
|
line = alloc_line();
|
||
|
if(line != NULL) {
|
||
|
len = strlen(str1);
|
||
|
strncpy(line, str1, TELNETD_CONF_LINELEN);
|
||
|
if(len < TELNETD_CONF_LINELEN) {
|
||
|
strncpy(line + len, str2, TELNETD_CONF_LINELEN - len);
|
||
|
}
|
||
|
len = strlen(line);
|
||
|
if(len < TELNETD_CONF_LINELEN - 2) {
|
||
|
line[len] = ISO_cr;
|
||
|
line[len+1] = ISO_nl;
|
||
|
line[len+2] = 0;
|
||
|
}
|
||
|
petsciiconv_toascii(line, TELNETD_CONF_LINELEN);
|
||
|
sendline(line);
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
PROCESS_THREAD(telnetd_process, ev, data)
|
||
|
{
|
||
|
PROCESS_BEGIN();
|
||
|
|
||
|
tcp_listen(HTONS(23));
|
||
|
memb_init(&linemem);
|
||
|
shell_init();
|
||
|
|
||
|
while(1) {
|
||
|
PROCESS_WAIT_EVENT();
|
||
|
if(ev == tcpip_event) {
|
||
|
telnetd_appcall(data);
|
||
|
} else if(ev == PROCESS_EVENT_EXIT) {
|
||
|
telnetd_quit();
|
||
|
} else {
|
||
|
#if TELNETD_CONF_GUI
|
||
|
telnetd_gui_eventhandler(ev, data);
|
||
|
#endif /* TELNETD_CONF_GUI */
|
||
|
}
|
||
|
}
|
||
|
|
||
|
PROCESS_END();
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
acked(void)
|
||
|
{
|
||
|
static unsigned int i;
|
||
|
|
||
|
while(s.numsent > 0) {
|
||
|
dealloc_line(s.lines[0]);
|
||
|
for(i = 1; i < TELNETD_CONF_NUMLINES; ++i) {
|
||
|
s.lines[i - 1] = s.lines[i];
|
||
|
}
|
||
|
s.lines[TELNETD_CONF_NUMLINES - 1] = NULL;
|
||
|
--s.numsent;
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
senddata(void)
|
||
|
{
|
||
|
static char *bufptr, *lineptr;
|
||
|
static int buflen, linelen;
|
||
|
|
||
|
bufptr = uip_appdata;
|
||
|
buflen = 0;
|
||
|
for(s.numsent = 0; s.numsent < TELNETD_CONF_NUMLINES &&
|
||
|
s.lines[s.numsent] != NULL ; ++s.numsent) {
|
||
|
lineptr = s.lines[s.numsent];
|
||
|
linelen = strlen(lineptr);
|
||
|
if(linelen > TELNETD_CONF_LINELEN) {
|
||
|
linelen = TELNETD_CONF_LINELEN;
|
||
|
}
|
||
|
if(buflen + linelen < uip_mss()) {
|
||
|
memcpy(bufptr, lineptr, linelen);
|
||
|
bufptr += linelen;
|
||
|
buflen += linelen;
|
||
|
} else {
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
uip_send(uip_appdata, buflen);
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
closed(void)
|
||
|
{
|
||
|
static unsigned int i;
|
||
|
|
||
|
for(i = 0; i < TELNETD_CONF_NUMLINES; ++i) {
|
||
|
if(s.lines[i] != NULL) {
|
||
|
dealloc_line(s.lines[i]);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
get_char(u8_t c)
|
||
|
{
|
||
|
if(c == ISO_cr) {
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
s.buf[(int)s.bufptr] = c;
|
||
|
if(s.buf[(int)s.bufptr] == ISO_nl ||
|
||
|
s.bufptr == sizeof(s.buf) - 1) {
|
||
|
if(s.bufptr > 0) {
|
||
|
s.buf[(int)s.bufptr] = 0;
|
||
|
petsciiconv_topetscii(s.buf, TELNETD_CONF_LINELEN);
|
||
|
}
|
||
|
shell_input(s.buf);
|
||
|
s.bufptr = 0;
|
||
|
} else {
|
||
|
++s.bufptr;
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
sendopt(u8_t option, u8_t value)
|
||
|
{
|
||
|
char *line;
|
||
|
line = alloc_line();
|
||
|
if(line != NULL) {
|
||
|
line[0] = TELNET_IAC;
|
||
|
line[1] = option;
|
||
|
line[2] = value;
|
||
|
line[3] = 0;
|
||
|
sendline(line);
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
static void
|
||
|
newdata(void)
|
||
|
{
|
||
|
u16_t len;
|
||
|
u8_t c;
|
||
|
|
||
|
|
||
|
len = uip_datalen();
|
||
|
|
||
|
while(len > 0 && s.bufptr < sizeof(s.buf)) {
|
||
|
c = *(char *)uip_appdata;
|
||
|
++((char *)uip_appdata);
|
||
|
--len;
|
||
|
switch(s.state) {
|
||
|
case STATE_IAC:
|
||
|
if(c == TELNET_IAC) {
|
||
|
get_char(c);
|
||
|
s.state = STATE_NORMAL;
|
||
|
} else {
|
||
|
switch(c) {
|
||
|
case TELNET_WILL:
|
||
|
s.state = STATE_WILL;
|
||
|
break;
|
||
|
case TELNET_WONT:
|
||
|
s.state = STATE_WONT;
|
||
|
break;
|
||
|
case TELNET_DO:
|
||
|
s.state = STATE_DO;
|
||
|
break;
|
||
|
case TELNET_DONT:
|
||
|
s.state = STATE_DONT;
|
||
|
break;
|
||
|
default:
|
||
|
s.state = STATE_NORMAL;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
case STATE_WILL:
|
||
|
/* Reply with a DONT */
|
||
|
sendopt(TELNET_DONT, c);
|
||
|
s.state = STATE_NORMAL;
|
||
|
break;
|
||
|
|
||
|
case STATE_WONT:
|
||
|
/* Reply with a DONT */
|
||
|
sendopt(TELNET_DONT, c);
|
||
|
s.state = STATE_NORMAL;
|
||
|
break;
|
||
|
case STATE_DO:
|
||
|
/* Reply with a WONT */
|
||
|
sendopt(TELNET_WONT, c);
|
||
|
s.state = STATE_NORMAL;
|
||
|
break;
|
||
|
case STATE_DONT:
|
||
|
/* Reply with a WONT */
|
||
|
sendopt(TELNET_WONT, c);
|
||
|
s.state = STATE_NORMAL;
|
||
|
break;
|
||
|
case STATE_NORMAL:
|
||
|
if(c == TELNET_IAC) {
|
||
|
s.state = STATE_IAC;
|
||
|
} else {
|
||
|
get_char(c);
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
|
||
|
}
|
||
|
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
void
|
||
|
telnetd_appcall(void *ts)
|
||
|
{
|
||
|
static unsigned int i;
|
||
|
if(uip_connected()) {
|
||
|
tcp_markconn(uip_conn, &s);
|
||
|
for(i = 0; i < TELNETD_CONF_NUMLINES; ++i) {
|
||
|
s.lines[i] = NULL;
|
||
|
}
|
||
|
s.bufptr = 0;
|
||
|
s.state = STATE_NORMAL;
|
||
|
|
||
|
shell_start();
|
||
|
}
|
||
|
|
||
|
if(s.state == STATE_CLOSE) {
|
||
|
s.state = STATE_NORMAL;
|
||
|
uip_close();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if(uip_closed() ||
|
||
|
uip_aborted() ||
|
||
|
uip_timedout()) {
|
||
|
closed();
|
||
|
}
|
||
|
|
||
|
if(uip_acked()) {
|
||
|
acked();
|
||
|
}
|
||
|
|
||
|
if(uip_newdata()) {
|
||
|
newdata();
|
||
|
}
|
||
|
|
||
|
if(uip_rexmit() ||
|
||
|
uip_newdata() ||
|
||
|
uip_acked() ||
|
||
|
uip_connected() ||
|
||
|
uip_poll()) {
|
||
|
senddata();
|
||
|
}
|
||
|
}
|
||
|
/*-----------------------------------------------------------------------------------*/
|
||
|
void
|
||
|
program_handler_load(char *name, char *arg)
|
||
|
{}
|