mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-08-20 01:58:32 -04:00
Add FreeRTOS-Plus directory.
This commit is contained in:
Richard Barry
parent
7bd5f21ad5
commit
f508a5f653
6798 changed files with 134949 additions and 19 deletions
392
FreeRTOS/Demo/uIP_Demo_Rowley_ARM7/uip/telnetd.c
Normal file
392
FreeRTOS/Demo/uIP_Demo_Rowley_ARM7/uip/telnetd.c
Normal file
|
|
@ -0,0 +1,392 @@
|
|||
/**
|
||||
* \addtogroup exampleapps
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \defgroup telnetd Telnet server
|
||||
* @{
|
||||
*
|
||||
* The uIP telnet server provides a command based interface to uIP. It
|
||||
* allows using the "telnet" application to access uIP, and implements
|
||||
* the required telnet option negotiation.
|
||||
*
|
||||
* The code is structured in a way which makes it possible to add
|
||||
* commands without having to rewrite the main telnet code. The main
|
||||
* telnet code calls two callback functions, telnetd_connected() and
|
||||
* telnetd_input(), when a telnet connection has been established and
|
||||
* when a line of text arrives on a telnet connection. These two
|
||||
* functions can be implemented in a way which suits the particular
|
||||
* application or environment in which the uIP system is intended to
|
||||
* be run.
|
||||
*
|
||||
* The uIP distribution contains an example telnet shell
|
||||
* implementation that provides a basic set of commands.
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Implementation of the Telnet server.
|
||||
* \author Adam Dunkels <adam@dunkels.com>
|
||||
*/
|
||||
|
||||
/*
|
||||
* 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 uIP TCP/IP stack.
|
||||
*
|
||||
* $Id: telnetd.c,v 1.1.2.2 2003/10/07 13:47:50 adam Exp $
|
||||
*
|
||||
*/
|
||||
|
||||
#include "uip.h"
|
||||
#include "memb.h"
|
||||
#include "telnetd.h"
|
||||
#include <string.h>
|
||||
|
||||
#define ISO_nl 0x0a
|
||||
#define ISO_cr 0x0d
|
||||
|
||||
MEMB(linemem, TELNETD_LINELEN, TELNETD_NUMLINES);
|
||||
|
||||
static u8_t i;
|
||||
|
||||
#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
|
||||
|
||||
#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);
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
static void
|
||||
sendline(struct telnetd_state *s, char *line)
|
||||
{
|
||||
static unsigned int i;
|
||||
for(i = 0; i < TELNETD_NUMLINES; ++i) {
|
||||
if(s->lines[i] == NULL) {
|
||||
s->lines[i] = line;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(i == TELNETD_NUMLINES) {
|
||||
dealloc_line(line);
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/**
|
||||
* Close a telnet session.
|
||||
*
|
||||
* This function can be called from a telnet command in order to close
|
||||
* the connection.
|
||||
*
|
||||
* \param s The connection which is to be closed.
|
||||
*
|
||||
*/
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
void
|
||||
telnetd_close(struct telnetd_state *s)
|
||||
{
|
||||
s->state = STATE_CLOSE;
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/**
|
||||
* Print a prompt on a telnet connection.
|
||||
*
|
||||
* This function can be called by the telnet command shell in order to
|
||||
* print out a command prompt.
|
||||
*
|
||||
* \param s A telnet connection.
|
||||
*
|
||||
* \param str The command prompt.
|
||||
*
|
||||
*/
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
void
|
||||
telnetd_prompt(struct telnetd_state *s, char *str)
|
||||
{
|
||||
char *line;
|
||||
line = alloc_line();
|
||||
if(line != NULL) {
|
||||
strncpy(line, str, TELNETD_LINELEN);
|
||||
sendline(s, line);
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/**
|
||||
* Print out a string on a telnet connection.
|
||||
*
|
||||
* This function can be called from a telnet command parser in order
|
||||
* to print out a string of text on the connection. The two strings
|
||||
* given as arguments to the function will be concatenated, a carrige
|
||||
* return and a new line character will be added, and the line is
|
||||
* sent.
|
||||
*
|
||||
* \param s The telnet connection.
|
||||
*
|
||||
* \param str1 The first string.
|
||||
*
|
||||
* \param str2 The second string.
|
||||
*
|
||||
*/
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
void
|
||||
telnetd_output(struct telnetd_state *s, char *str1, char *str2)
|
||||
{
|
||||
static unsigned len;
|
||||
char *line;
|
||||
|
||||
line = alloc_line();
|
||||
if(line != NULL) {
|
||||
len = strlen(str1);
|
||||
strncpy(line, str1, TELNETD_LINELEN);
|
||||
if(len < TELNETD_LINELEN) {
|
||||
strncpy(line + len, str2, TELNETD_LINELEN - len);
|
||||
}
|
||||
len = strlen(line);
|
||||
if(len < TELNETD_LINELEN - 2) {
|
||||
line[len] = ISO_cr;
|
||||
line[len+1] = ISO_nl;
|
||||
line[len+2] = 0;
|
||||
}
|
||||
sendline(s, line);
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/**
|
||||
* Initialize the telnet server.
|
||||
*
|
||||
* This function will perform the necessary initializations and start
|
||||
* listening on TCP port 23.
|
||||
*/
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
void
|
||||
telnetd_init(void)
|
||||
{
|
||||
memb_init(&linemem);
|
||||
uip_listen(HTONS(23));
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
static void
|
||||
acked(struct telnetd_state *s)
|
||||
{
|
||||
dealloc_line(s->lines[0]);
|
||||
for(i = 1; i < TELNETD_NUMLINES; ++i) {
|
||||
s->lines[i - 1] = s->lines[i];
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
static void
|
||||
senddata(struct telnetd_state *s)
|
||||
{
|
||||
if(s->lines[0] != NULL) {
|
||||
uip_send(s->lines[0], strlen(s->lines[0]));
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
static void
|
||||
getchar(struct telnetd_state *s, 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;
|
||||
}
|
||||
telnetd_input(s, s->buf);
|
||||
s->bufptr = 0;
|
||||
} else {
|
||||
++s->bufptr;
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
static void
|
||||
sendopt(struct telnetd_state *s, 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(s, line);
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
static void
|
||||
newdata(struct telnetd_state *s)
|
||||
{
|
||||
u16_t len;
|
||||
u8_t c;
|
||||
|
||||
|
||||
len = uip_datalen();
|
||||
|
||||
while(len > 0 && s->bufptr < sizeof(s->buf)) {
|
||||
c = *uip_appdata;
|
||||
++uip_appdata;
|
||||
--len;
|
||||
switch(s->state) {
|
||||
case STATE_IAC:
|
||||
if(c == TELNET_IAC) {
|
||||
getchar(s, 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(s, TELNET_DONT, c);
|
||||
s->state = STATE_NORMAL;
|
||||
break;
|
||||
|
||||
case STATE_WONT:
|
||||
/* Reply with a DONT */
|
||||
sendopt(s, TELNET_DONT, c);
|
||||
s->state = STATE_NORMAL;
|
||||
break;
|
||||
case STATE_DO:
|
||||
/* Reply with a WONT */
|
||||
sendopt(s, TELNET_WONT, c);
|
||||
s->state = STATE_NORMAL;
|
||||
break;
|
||||
case STATE_DONT:
|
||||
/* Reply with a WONT */
|
||||
sendopt(s, TELNET_WONT, c);
|
||||
s->state = STATE_NORMAL;
|
||||
break;
|
||||
case STATE_NORMAL:
|
||||
if(c == TELNET_IAC) {
|
||||
s->state = STATE_IAC;
|
||||
} else {
|
||||
getchar(s, c);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
void
|
||||
telnetd_app(void)
|
||||
{
|
||||
struct telnetd_state *s;
|
||||
|
||||
s = (struct telnetd_state *)uip_conn->appstate;
|
||||
|
||||
if(uip_connected()) {
|
||||
|
||||
for(i = 0; i < TELNETD_NUMLINES; ++i) {
|
||||
s->lines[i] = NULL;
|
||||
}
|
||||
s->bufptr = 0;
|
||||
s->state = STATE_NORMAL;
|
||||
|
||||
telnetd_connected(s);
|
||||
senddata(s);
|
||||
return;
|
||||
}
|
||||
|
||||
if(s->state == STATE_CLOSE) {
|
||||
s->state = STATE_NORMAL;
|
||||
uip_close();
|
||||
return;
|
||||
}
|
||||
|
||||
if(uip_closed()) {
|
||||
telnetd_output(s, "Connection closed", "");
|
||||
}
|
||||
|
||||
|
||||
if(uip_aborted()) {
|
||||
telnetd_output(s, "Connection reset", "");
|
||||
}
|
||||
|
||||
if(uip_timedout()) {
|
||||
telnetd_output(s, "Connection timed out", "");
|
||||
}
|
||||
|
||||
if(uip_acked()) {
|
||||
acked(s);
|
||||
}
|
||||
|
||||
if(uip_newdata()) {
|
||||
newdata(s);
|
||||
}
|
||||
|
||||
if(uip_rexmit() ||
|
||||
uip_newdata() ||
|
||||
uip_acked()) {
|
||||
senddata(s);
|
||||
} else if(uip_poll()) {
|
||||
senddata(s);
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
Loading…
Add table
Add a link
Reference in a new issue