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178 lines
5.7 KiB
C
178 lines
5.7 KiB
C
/*
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* Copyright (c) 2008, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: shell-rime-netcmd.c,v 1.8 2009/04/06 23:29:31 adamdunkels Exp $
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*/
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/**
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* \file
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* A brief description of what this file is.
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "contiki.h"
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#include "contiki-conf.h"
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#include "shell-rime.h"
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#include "dev/leds.h"
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#include "lib/crc16.h"
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#include "lib/random.h"
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#include "net/rime.h"
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#include "net/rime/neighbor.h"
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#include "net/rime/route.h"
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#include "net/rime/trickle.h"
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#include "net/rime/timesynch.h"
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#if CONTIKI_TARGET_NETSIM
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#include "ether.h"
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#endif /* CONTIKI_TARGET_NETSIM */
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#include <stdio.h>
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#ifndef HAVE_SNPRINTF
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int snprintf(char *str, size_t size, const char *format, ...);
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#endif /* HAVE_SNPRINTF */
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#include <string.h>
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#define COLLECT_REXMITS 4
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#define TRICKLEMSG_HDR_SIZE 2
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struct trickle_msg {
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uint16_t crc;
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char netcmd[1];
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};
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static struct trickle_conn trickle;
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/*---------------------------------------------------------------------------*/
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PROCESS(shell_netcmd_process, "netcmd");
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PROCESS(shell_netcmd_server_process, "netcmd server");
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SHELL_COMMAND(netcmd_command,
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"netcmd",
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"netcmd <command>: run a command on all nodes in the network",
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&shell_netcmd_process);
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(shell_netcmd_server_process, ev, data)
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{
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static struct process *child_command;
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int err;
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PROCESS_BEGIN();
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/* XXX: direct output to null. */
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/* printf("netcmd server got command string '%s'\n", (char *)data);*/
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err = shell_start_command(data, strlen((char * )data), NULL, &child_command);
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if(err == SHELL_FOREGROUND && process_is_running(child_command)) {
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PROCESS_WAIT_EVENT_UNTIL(ev == PROCESS_EVENT_EXIT ||
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(ev == PROCESS_EVENT_EXITED &&
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data == child_command));
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if(ev == PROCESS_EVENT_EXIT) {
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process_exit(child_command);
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(shell_netcmd_process, ev, data)
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{
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struct trickle_msg *msg;
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int len;
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PROCESS_BEGIN();
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/* Get the length of the command line, excluding a terminating NUL character. */
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len = strlen((char *)data);
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/* Check the length of the command line to see that it is small
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enough to fit in a packet. We count with 32 bytes of header,
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which may be a little too much, but at least we are on the safe
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side. */
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if(len > PACKETBUF_SIZE - 32) {
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char buf[32];
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snprintf(buf, sizeof(buf), "%d", len);
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shell_output_str(&netcmd_command, "command line too large: ", buf);
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} else {
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packetbuf_clear();
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msg = packetbuf_dataptr();
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packetbuf_set_datalen(len + 1 + TRICKLEMSG_HDR_SIZE);
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strcpy(msg->netcmd, data);
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/* Terminate the string with a NUL character. */
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msg->netcmd[len] = 0;
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msg->crc = crc16_data(msg->netcmd, len, 0);
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/* printf("netcmd sending '%s'\n", msg->netcmd);*/
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trickle_send(&trickle);
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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static void
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recv_trickle(struct trickle_conn *c)
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{
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struct trickle_msg *msg;
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uint16_t crc;
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int len;
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msg = packetbuf_dataptr();
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if(packetbuf_datalen() > 1 + TRICKLEMSG_HDR_SIZE) {
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/* First ensure that the old process is killed. */
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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. */
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msg->netcmd[len] = 0;
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memcpy(&crc, &msg->crc, sizeof(crc));
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if(crc == crc16_data(msg->netcmd, len, 0)) {
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/* Start the server process with the incoming command. */
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process_start(&shell_netcmd_server_process, msg->netcmd);
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}
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}
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}
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const static struct trickle_callbacks trickle_callbacks = { recv_trickle };
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/*---------------------------------------------------------------------------*/
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void
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shell_rime_netcmd_init(void)
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{
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trickle_open(&trickle, CLOCK_SECOND * 4, SHELL_RIME_CHANNEL_NETCMD,
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&trickle_callbacks);
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shell_register_command(&netcmd_command);
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}
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/*---------------------------------------------------------------------------*/
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