px4-firmware/apps/nshlib/nsh_telnetd.c

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/****************************************************************************
* apps/nshlib/nsh_telnetd.c
*
* Copyright (C) 2007-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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. Neither the name Gregory Nutt nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <debug.h>
#include <apps/netutils/telnetd.h>
#include "nsh.h"
#include "nsh_console.h"
#ifdef CONFIG_NSH_TELNET
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_telnetmain
****************************************************************************/
int nsh_telnetmain(int argc, char *argv[])
{
FAR struct console_stdio_s *pstate = nsh_newconsole();
DEBUGASSERT(pstate != NULL);
dbg("Session [%d] Started\n", getpid());
/* Present a greeting */
fputs(g_nshgreeting, pstate->cn_outstream);
fflush(pstate->cn_outstream);
/* Execute the startup script */
#if defined(CONFIG_NSH_ROMFSETC) && !defined(CONFIG_NSH_CONSOLE)
(void)nsh_script(&pstate->cn_vtbl, "init", NSH_INITPATH);
#endif
/* Then enter the command line parsing loop */
for (;;)
{
/* Display the prompt string */
fputs(g_nshprompt, pstate->cn_outstream);
fflush(pstate->cn_outstream);
/* Get the next line of input from the Telnet client */
if (fgets(pstate->cn_line, CONFIG_NSH_LINELEN, INSTREAM(pstate)) != NULL)
{
/* Parse process the received Telnet command */
(void)nsh_parse(&pstate->cn_vtbl, pstate->cn_line);
fflush(pstate->cn_outstream);
}
else
{
fprintf(pstate->cn_outstream, g_fmtcmdfailed, "nsh_telnetmain",
"fgets", NSH_ERRNO);
nsh_exit(&pstate->cn_vtbl, 1);
}
}
/* Clean up */
nsh_exit(&pstate->cn_vtbl, 0);
/* We do not get here, but this is necessary to keep some compilers happy */
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_telnetstart
*
* Description:
* nsh_telnetstart() starts the Telnet daemon that will allow multiple
* NSH connections via Telnet. This function returns immediately after
* the daemon has been started.
*
* Input Parameters:
* None. All of the properties of the Telnet daemon are controlled by
* NuttX configuration setting.
*
* Returned Values:
* Zero if the Telnet daemon was successfully started. A negated errno
* value will be returned on failure.
*
****************************************************************************/
int nsh_telnetstart(void)
{
struct telnetd_config_s config;
int ret;
/* Configure the telnet daemon */
config.d_port = HTONS(CONFIG_NSH_TELNETD_PORT);
config.d_priority = CONFIG_NSH_TELNETD_DAEMONPRIO;
config.d_stacksize = CONFIG_NSH_TELNETD_DAEMONSTACKSIZE;
config.t_priority = CONFIG_NSH_TELNETD_CLIENTPRIO;
config.t_stacksize = CONFIG_NSH_TELNETD_CLIENTSTACKSIZE;
config.t_entry = nsh_telnetmain;
/* Start the telnet daemon */
vdbg("Starting the Telnet daemon\n");
ret = telnetd_start(&config);
if (ret < 0)
{
dbg("Failed to tart the Telnet daemon: %d\n", ret);
}
return ret;
}
#endif /* CONFIG_NSH_TELNET */