155 lines
4.2 KiB
C
155 lines
4.2 KiB
C
/*
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* $Id$
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*/
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/*
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* cansend.c - simple command line tool to send CAN-frames via CAN_RAW sockets
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*
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* Copyright (c) 2002-2005 Volkswagen Group Electronic Research
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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, the following disclaimer and
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* the referenced file 'COPYING'.
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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 Volkswagen 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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* Alternatively, provided that this notice is retained in full, this
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* software may be distributed under the terms of the GNU General
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* Public License ("GPL") version 2 as distributed in the 'COPYING'
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* file from the main directory of the linux kernel source.
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*
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* The provided data structures and external interfaces from this code
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* are not restricted to be used by modules with a GPL compatible license.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* Send feedback to <socketcan-users@lists.berlios.de>
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <linux/can.h>
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#define CANID_DELIM '#'
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#define DATA_SEPERATOR '.'
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static int asc2nibble(char c){
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if ((c >= '0') && (c <= '9'))
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return c - '0';
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if ((c >= 'A') && (c <= 'F'))
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return c - 'A' + 10;
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if ((c >= 'a') && (c <= 'f'))
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return c - 'a' + 10;
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return 16; /* error */
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}
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int parse_canframe(char *cs, struct can_frame *cf){
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/* documentation see lib.h */
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int i, idx, dlc, len, tmp;
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len = strlen(cs);
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//printf("'%s' len %d\n", cs, len);
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memset(cf, 0, sizeof(*cf)); /* init CAN frame, e.g. DLC = 0 */
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if (len < 4)
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return 1;
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if (!((cs[3] == CANID_DELIM) || (cs[8] == CANID_DELIM)))
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return 1;
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if (cs[8] == CANID_DELIM) {
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idx = 9;
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cf->can_id = CAN_EFF_FLAG;
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for (i=0; i<8; i++){
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if ((tmp = asc2nibble(cs[i])) > 0x0F)
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return 1;
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cf->can_id |= (tmp << (7-i)*4);
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}
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} else {
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idx = 4;
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for (i=0; i<3; i++){
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if ((tmp = asc2nibble(cs[i])) > 0x0F)
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return 1;
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cf->can_id |= (tmp << (2-i)*4);
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}
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}
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if((cs[idx] == 'R') || (cs[idx] == 'r')){ /* RTR frame */
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cf->can_id |= CAN_RTR_FLAG;
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return 0;
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}
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for (i=0, dlc=0; i<8; i++){
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if(cs[idx] == DATA_SEPERATOR) /* skip (optional) seperator */
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idx++;
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if(idx >= len) /* end of string => end of data */
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break;
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if ((tmp = asc2nibble(cs[idx++])) > 0x0F)
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return 1;
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cf->data[i] = (tmp << 4);
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if ((tmp = asc2nibble(cs[idx++])) > 0x0F)
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return 1;
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cf->data[i] |= tmp;
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dlc++;
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}
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cf->can_dlc = dlc;
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return 0;
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}
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void fprint_canframe(FILE *stream , struct can_frame *cf, char *eol){
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/* documentation see lib.h */
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int i;
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if (cf->can_id & CAN_EFF_FLAG)
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fprintf(stream, "%8X ", cf->can_id & CAN_EFF_MASK);
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else
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fprintf(stream, "%3X ", cf->can_id & CAN_SFF_MASK);
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fprintf(stream, "[%d] ", cf->can_dlc);
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for (i = 0; i < cf->can_dlc; i++) {
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fprintf(stream, "%02X ", cf->data[i]);
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}
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if (cf->can_id & CAN_RTR_FLAG)
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fprintf(stream, "remote request");
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if (eol)
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fprintf(stream, "%s", eol);
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}
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