/****************************************************************************
* examples/telnetd/telnetd.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* This is a leverage of similar logic from uIP:
*
* Author: Adam Dunkels <adam@sics.se>
* 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <apps/netutils/telnetd.h>
#include <apps/netutils/netlib.h>
#include "telnetd.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct ptentry_s
{
FAR const char *commandstr;
void (*pfunc)(int argc, char **argv);
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void telnetd_help(int argc, char **argv);
static void telnetd_quit(int argc, char **argv);
static void telnetd_unknown(int argc, char **argv);
static void telnetd_parse(FAR char *line, int len);
/****************************************************************************
* Private Data
****************************************************************************/
static struct ptentry_s g_parsetab[] =
{
{"help", telnetd_help},
{"exit", telnetd_quit},
{"?", telnetd_help},
{NULL, telnetd_unknown}
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: telnetd_help
****************************************************************************/
static void telnetd_help(int argc, char **argv)
{
printf("Available commands:\n");
printf(" help, ? - show help\n");
printf(" exit - exit shell\n");
}
/****************************************************************************
* Name: telnetd_help
****************************************************************************/
static void telnetd_unknown(int argc, char **argv)
{
if (argv[0])
{
printf("Unknown command: %s\n", argv[0]);
}
}
/****************************************************************************
* Name: telnetd_quit
****************************************************************************/
static void telnetd_quit(int argc, char **argv)
{
printf("Bye!\n");
exit(0);
}
/****************************************************************************
* Name: telnetd_parse
****************************************************************************/
static void telnetd_parse(FAR char *line, int len)
{
struct ptentry_s *entry;
FAR char *cmd;
FAR char *saveptr;
/* Get the command from the beginning the line */
cmd = strtok_r(line, " \t\n\r\f\v", &saveptr);
if (cmd)
{
/* Now find the matching command in the command table */
for (entry = g_parsetab; entry->commandstr != NULL; entry++)
{
if (strncmp(entry->commandstr, cmd, strlen(entry->commandstr)) == 0)
{
break;
}
}
entry->pfunc(1, &cmd);
}
}
/****************************************************************************
* Name: telnetd_session
****************************************************************************/
int telnetd_session(int argc, char *argv[])
{
char line[128];
printf("uIP command shell -- NuttX style\n");
printf("Type '?' and return for help\n");
for (;;)
{
printf(SHELL_PROMPT);
fflush(stdout);
if (fgets(line, 128, stdin) == NULL)
{
break;
}
telnetd_parse(line, 128);
}
return 0;
}
/****************************************************************************
* Name: telnetd_netinit
****************************************************************************/
static void telnetd_netinit(void)
{
struct in_addr addr;
#ifdef CONFIG_EXAMPLES_TELNETD_NOMAC
uint8_t mac[IFHWADDRLEN];
#endif
/* Many embedded network interfaces must have a software assigned MAC */
#ifdef CONFIG_EXAMPLES_TELNETD_NOMAC
mac[0] = 0x00;
mac[1] = 0xe0;
mac[2] = 0xde;
mac[3] = 0xad;
mac[4] = 0xbe;
mac[5] = 0xef;
netlib_setmacaddr("eth0", mac);
#endif
/* Set up our host address */
addr.s_addr = HTONL(CONFIG_EXAMPLES_TELNETD_IPADDR);
netlib_sethostaddr("eth0", &addr);
/* Set up the default router address */
addr.s_addr = HTONL(CONFIG_EXAMPLES_TELNETD_DRIPADDR);
netlib_setdraddr("eth0", &addr);
/* Setup the subnet mask */
addr.s_addr = HTONL(CONFIG_EXAMPLES_TELNETD_NETMASK);
netlib_setnetmask("eth0", &addr);
}
/****************************************************************************
* Public Functions
****************************************************************************/
#ifdef CONFIG_BUILD_KERNEL
int main(int argc, FAR char *argv[])
#else
int telnetd_main(int argc, char *argv[])
#endif
{
struct telnetd_config_s config;
int ret;
/* Configure the network */
printf("telnetd_main: Initializing the network\n");
telnetd_netinit();
/* Configure the telnet daemon */
config.d_port = HTONS(23);
config.d_priority = CONFIG_EXAMPLES_TELNETD_DAEMONPRIO;
config.d_stacksize = CONFIG_EXAMPLES_TELNETD_DAEMONSTACKSIZE;
config.t_priority = CONFIG_EXAMPLES_TELNETD_CLIENTPRIO;
config.t_stacksize = CONFIG_EXAMPLES_TELNETD_CLIENTSTACKSIZE;
config.t_entry = telnetd_session;
/* Start the telnet daemon */
printf("telnetd_main: Starting the Telnet daemon\n");
ret = telnetd_start(&config);
if (ret < 0)
{
printf("Failed to tart the Telnet daemon\n");
}
printf("telnetd_main: Exiting\n");
return 0;
}
