mirror of
https://github.com/oliverschmidt/contiki.git
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268 lines
8.2 KiB
C
268 lines
8.2 KiB
C
/*
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* Copyright (c) 2009, 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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*/
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/**
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* \file Shell command for downloading files from a remote node.
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* Example usage:
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* 'download <node addr> <filename> | write <local_filename'.
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*
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* \author Luca Mottola <luca@sics.se>, Fredrik Osterlind <fros@sics.se>
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*/
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#include "contiki.h"
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#include "shell.h"
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#include "net/rime.h"
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#include "cfs/cfs.h"
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#include "dev/leds.h"
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#include <stdio.h>
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#include <string.h>
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#define RUNICAST_CHANNEL SHELL_RIME_CHANNEL_DOWNLOAD
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#define RUCB_CHANNEL (SHELL_RIME_CHANNEL_DOWNLOAD+1)
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#define MAX_RETRANSMISSIONS 8
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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PROCESS(shell_download_process, "download");
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PROCESS(shell_download_server_process, "download server");
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SHELL_COMMAND(download_command,
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"download",
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"download <node addr> <filename>: download file from remote node",
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&shell_download_process);
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/*---------------------------------------------------------------------------*/
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static struct runicast_conn runicast;
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static struct rucb_conn rucb;
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static uint8_t downloading;
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static uint8_t req_seq_counter;
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static uint8_t req_last_seq;
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static int fd;
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/*---------------------------------------------------------------------------*/
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static void
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write_chunk(struct rucb_conn *c, int offset, int flag, char *data, int datalen)
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{
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if(datalen > 0) {
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shell_output(&download_command,
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data, datalen, NULL, 0);
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PRINTF("write_chunk %d at %d bytes\n", datalen, offset);
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}
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if(flag == RUCB_FLAG_NEWFILE) {
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PRINTF("RUCB_FLAG_NEWFILE\n");
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} else if(flag == RUCB_FLAG_NONE) {
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PRINTF("RUCB_FLAG_NONE\n");
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}
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if(flag == RUCB_FLAG_LASTCHUNK) {
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PRINTF("RUCB_FLAG_LASTCHUNK\n");
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downloading = 0;
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process_poll(&shell_download_process);
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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read_chunk(struct rucb_conn *c, int offset, char *to, int maxsize)
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{
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int ret;
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if(fd < 0) {
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/* No file, send EOF */
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leds_off(LEDS_GREEN);
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return 0;
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}
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cfs_seek(fd, offset, CFS_SEEK_SET);
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ret = cfs_read(fd, to, maxsize);
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PRINTF("read_chunk %d bytes at %d\n", ret, offset);
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if(ret < maxsize) {
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PRINTF("read_chunk DONE\n");
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cfs_close(fd);
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fd = -1;
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}
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return ret;
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}
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/*---------------------------------------------------------------------------*/
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static void
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timedout(struct rucb_conn *c)
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{
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}
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/*---------------------------------------------------------------------------*/
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static const struct rucb_callbacks rucb_call = { write_chunk, read_chunk, timedout };
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(shell_download_process, ev, data)
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{
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const char *nextptr;
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static rimeaddr_t addr;
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int len;
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char buf[32];
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PROCESS_BEGIN();
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/* Parse node addr */
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addr.u8[0] = shell_strtolong(data, &nextptr);
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if(nextptr == data || *nextptr != '.') {
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shell_output_str(&download_command,
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"download <node addr> <filename>: need node address", "");
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PROCESS_EXIT();
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}
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++nextptr;
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addr.u8[1] = shell_strtolong(nextptr, &nextptr);
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/* Get the length of the file, excluding a terminating NUL character. */
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while(nextptr[0] == ' ') {
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nextptr++;
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}
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len = strlen(nextptr);
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/*snprintf(buf, sizeof(buf), "%d.%d", addr.u8[0], addr.u8[1]);*/
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/*shell_output_str(&download_command, "Downloading from: ", buf);*/
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if(len > PACKETBUF_SIZE - 32) {
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snprintf(buf, sizeof(buf), "%d", len);
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shell_output_str(&download_command, "filename too large: ", buf);
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PROCESS_EXIT();
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}
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/*shell_output_str(&download_command, "Downloading file: ", nextptr);*/
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/* Send file request */
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downloading = 1;
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rucb_open(&rucb, RUCB_CHANNEL, &rucb_call);
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packetbuf_clear();
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*((uint8_t *)packetbuf_dataptr()) = ++req_seq_counter;
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memcpy(((char *)packetbuf_dataptr()) + 1, nextptr, len + 1);
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packetbuf_set_datalen(len + 2);
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PRINTF("requesting '%s'\n", nextptr);
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runicast_send(&runicast, &addr, MAX_RETRANSMISSIONS);
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/* Wait for download to finish */
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leds_on(LEDS_BLUE);
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PROCESS_WAIT_UNTIL(!runicast_is_transmitting(&runicast) && !downloading);
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leds_off(LEDS_BLUE);
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rucb_close(&rucb);
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/*shell_output_str(&download_command, "Done!", "");*/
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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static void
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request_recv(struct runicast_conn *c, const rimeaddr_t *from, uint8_t seqno)
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{
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const char *filename;
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uint8_t seq;
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if(packetbuf_datalen() < 2) {
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/* Bad filename, ignore request */
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printf("download: bad filename request (null)\n");
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return;
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}
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seq = ((uint8_t *)packetbuf_dataptr())[0];
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if(seq == req_last_seq) {
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PRINTF("download: ignoring duplicate request\n");
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return;
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}
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req_last_seq = seq;
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filename = ((char *)packetbuf_dataptr()) + 1;
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PRINTF("file requested: '%s'\n", filename);
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/* Initiate file transfer */
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leds_on(LEDS_GREEN);
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if(fd >= 0) {
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cfs_close(fd);
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}
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fd = cfs_open(filename, CFS_READ);
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if(fd < 0) {
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printf("download: bad filename request (no read access): %s\n", filename);
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} else {
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PRINTF("download: sending file: %s\n", filename);
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}
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rucb_close(&rucb);
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rucb_open(&rucb, RUCB_CHANNEL, &rucb_call);
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rucb_send(&rucb, from);
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}
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/*---------------------------------------------------------------------------*/
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static void
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request_sent(struct runicast_conn *c, const rimeaddr_t *to,
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uint8_t retransmissions)
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{
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process_poll(&shell_download_process);
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}
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/*---------------------------------------------------------------------------*/
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static void
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request_timedout(struct runicast_conn *c, const rimeaddr_t *to,
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uint8_t retransmissions)
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{
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shell_output_str(&download_command, "download: request timed out", "");
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downloading = 0;
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process_poll(&shell_download_process);
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}
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/*---------------------------------------------------------------------------*/
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static const struct runicast_callbacks runicast_callbacks =
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{request_recv, request_sent, request_timedout};
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(shell_download_server_process, ev, data)
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{
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PROCESS_EXITHANDLER( runicast_close(&runicast); rucb_close(&rucb); );
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PROCESS_BEGIN();
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runicast_open(&runicast, RUNICAST_CHANNEL, &runicast_callbacks);
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PROCESS_WAIT_UNTIL(0);
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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void
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shell_download_init(void)
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{
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req_seq_counter = 0;
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req_last_seq = -1;
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fd = -1;
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downloading = 0;
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shell_register_command(&download_command);
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process_start(&shell_download_server_process, NULL);
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}
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/*---------------------------------------------------------------------------*/
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