nes-proj/apps/shell/shell-rime-netcmd.c

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/*
* Copyright (c) 2008, Swedish Institute of Computer Science.
* 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* A brief description of what this file is.
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
#include "contiki-conf.h"
#include "shell-rime.h"
#include "dev/leds.h"
#include "lib/crc16.h"
#include "lib/random.h"
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#include "net/rime/rime.h"
#include "net/rime/route.h"
#include "net/rime/trickle.h"
#include "net/rime/timesynch.h"
#if CONTIKI_TARGET_NETSIM
#include "ether.h"
#endif /* CONTIKI_TARGET_NETSIM */
#include <stdio.h>
#ifndef HAVE_SNPRINTF
int snprintf(char *str, size_t size, const char *format, ...);
#endif /* HAVE_SNPRINTF */
#include <string.h>
#define COLLECT_REXMITS 4
#define TRICKLEMSG_HDR_SIZE 2
struct trickle_msg {
uint16_t crc;
char netcmd[1];
};
static struct trickle_conn trickle;
/*---------------------------------------------------------------------------*/
PROCESS(shell_netcmd_process, "netcmd");
PROCESS(shell_netcmd_server_process, "netcmd server");
SHELL_COMMAND(netcmd_command,
"netcmd",
"netcmd <command>: run a command on all nodes in the network",
&shell_netcmd_process);
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(shell_netcmd_server_process, ev, data)
{
static struct process *child_command;
int err;
PROCESS_BEGIN();
/* XXX: direct output to null. */
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printf("netcmd server got command string '%s'\n", (char *)data);
err = shell_start_command(data, strlen((char * )data), NULL, &child_command);
if(err == SHELL_FOREGROUND && process_is_running(child_command)) {
PROCESS_WAIT_EVENT_UNTIL(ev == PROCESS_EVENT_EXIT ||
(ev == PROCESS_EVENT_EXITED &&
data == child_command));
if(ev == PROCESS_EVENT_EXIT) {
process_exit(child_command);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(shell_netcmd_process, ev, data)
{
struct trickle_msg *msg;
int len;
PROCESS_BEGIN();
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/* Get the length of the command line, excluding a terminating NUL character. */
len = strlen((char *)data);
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/* Check the length of the command line to see that it is small
enough to fit in a packet. We count with 32 bytes of header,
which may be a little too much, but at least we are on the safe
side. */
if(len > PACKETBUF_SIZE - 32) {
char buf[32];
snprintf(buf, sizeof(buf), "%d", len);
shell_output_str(&netcmd_command, "command line too large: ", buf);
} else {
packetbuf_clear();
msg = packetbuf_dataptr();
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packetbuf_set_datalen(len + 1 + TRICKLEMSG_HDR_SIZE);
strcpy(msg->netcmd, data);
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/* Terminate the string with a NUL character. */
msg->netcmd[len] = 0;
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msg->crc = crc16_data((unsigned char *)msg->netcmd, len, 0);
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printf("netcmd sending '%s'\n", msg->netcmd);
trickle_send(&trickle);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static void
recv_trickle(struct trickle_conn *c)
{
struct trickle_msg *msg;
uint16_t crc;
int len;
msg = packetbuf_dataptr();
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if(packetbuf_datalen() > 1 + TRICKLEMSG_HDR_SIZE) {
/* First ensure that the old process is killed. */
process_exit(&shell_netcmd_server_process);
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len = packetbuf_datalen() - 1 - TRICKLEMSG_HDR_SIZE;
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/* Make sure that the incoming command is null-terminated. */
msg->netcmd[len] = 0;
memcpy(&crc, &msg->crc, sizeof(crc));
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if(crc == crc16_data((unsigned char *)msg->netcmd, len, 0)) {
/* Start the server process with the incoming command. */
process_start(&shell_netcmd_server_process, (void *)msg->netcmd);
}
}
}
const static struct trickle_callbacks trickle_callbacks = { recv_trickle };
/*---------------------------------------------------------------------------*/
void
shell_rime_netcmd_init(void)
{
trickle_open(&trickle, CLOCK_SECOND * 4, SHELL_RIME_CHANNEL_NETCMD,
&trickle_callbacks);
shell_register_command(&netcmd_command);
}
/*---------------------------------------------------------------------------*/