248 lines
6.7 KiB
C
248 lines
6.7 KiB
C
/*
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* $Id$
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*/
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/*
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* lib.c - library for command line tools
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*
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* Copyright (c) 2002-2007 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 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 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, in which case the provisions of the
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* GPL apply INSTEAD OF those given above.
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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 <sys/socket.h> /* for sa_family_t */
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#include <linux/can.h>
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#include "lib.h"
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#define CANID_DELIM '#'
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#define DATA_SEPERATOR '.'
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#define MAX_CANFRAME "12345678#01.23.45.67.89.AB.CD.EF"
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#define MAX_LONG_CANFRAME "12345678 [8] 10101010 10101010 10101010 10101010 10101010 10101010 10101010 10101010 '........'"
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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) { /* 8 digits */
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idx = 9;
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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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if (!(cf->can_id & CAN_ERR_FLAG)) /* 8 digits but no errorframe? */
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cf->can_id |= CAN_EFF_FLAG; /* then it is an extended frame */
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} else { /* 3 digits */
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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, int sep) {
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/* documentation see lib.h */
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char buf[sizeof(MAX_CANFRAME)+1]; /* max length */
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sprint_canframe(buf, cf, sep);
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fprintf(stream, "%s", buf);
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if (eol)
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fprintf(stream, "%s", eol);
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}
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void sprint_canframe(char *buf , struct can_frame *cf, int sep) {
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/* documentation see lib.h */
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int i,offset;
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if (cf->can_id & CAN_ERR_FLAG) {
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sprintf(buf, "%08X#", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
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offset = 9;
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} else if (cf->can_id & CAN_EFF_FLAG) {
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sprintf(buf, "%08X#", cf->can_id & CAN_EFF_MASK);
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offset = 9;
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} else {
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sprintf(buf, "%03X#", cf->can_id & CAN_SFF_MASK);
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offset = 4;
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}
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if (cf->can_id & CAN_RTR_FLAG) /* there are no ERR frames with RTR */
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sprintf(buf+offset, "R");
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else
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for (i = 0; i < cf->can_dlc; i++) {
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sprintf(buf+offset, "%02X", cf->data[i]);
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offset += 2;
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if (sep && (i+1 < cf->can_dlc))
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sprintf(buf+offset++, ".");
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}
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}
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void fprint_long_canframe(FILE *stream , struct can_frame *cf, char *eol, int view) {
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/* documentation see lib.h */
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char buf[sizeof(MAX_LONG_CANFRAME)+1]; /* max length */
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sprint_long_canframe(buf, cf, view);
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fprintf(stream, "%s", buf);
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if (eol)
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fprintf(stream, "%s", eol);
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}
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void sprint_long_canframe(char *buf , struct can_frame *cf, int view) {
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/* documentation see lib.h */
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int i, j, dlen, offset;
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if (cf->can_id & CAN_ERR_FLAG) {
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sprintf(buf, "%8X ", cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
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offset = 10;
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} else if (cf->can_id & CAN_EFF_FLAG) {
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sprintf(buf, "%8X ", cf->can_id & CAN_EFF_MASK);
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offset = 10;
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} else {
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sprintf(buf, "%3X ", cf->can_id & CAN_SFF_MASK);
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offset = 5;
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}
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sprintf(buf+offset, "[%d]", cf->can_dlc);
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offset += 3;
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if (cf->can_id & CAN_RTR_FLAG) { /* there are no ERR frames with RTR */
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sprintf(buf+offset, " remote request");
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return;
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}
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if (view & CANLIB_VIEW_BINARY) {
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dlen = 9; /* _10101010 */
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for (i = 0; i < cf->can_dlc; i++) {
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buf[offset++] = ' ';
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for (j = 7; j >= 0; j--)
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buf[offset++] = (1<<j & cf->data[i])?'1':'0';
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}
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buf[offset] = 0; /* terminate string */
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} else {
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dlen = 3; /* _AA */
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for (i = 0; i < cf->can_dlc; i++) {
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sprintf(buf+offset, " %02X", cf->data[i]);
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offset += dlen;
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}
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}
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if (cf->can_id & CAN_ERR_FLAG)
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sprintf(buf+offset, "%*s", dlen*(8-cf->can_dlc)+13, "ERRORFRAME");
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else if (view & CANLIB_VIEW_ASCII) {
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j = dlen*(8-cf->can_dlc)+4;
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sprintf(buf+offset, "%*s", j, "'");
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offset += j;
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for (i = 0; i < cf->can_dlc; i++)
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if ((cf->data[i] > 0x1F) && (cf->data[i] < 0x7F))
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buf[offset++] = cf->data[i];
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else
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buf[offset++] = '.';
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sprintf(buf+offset, "'");
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}
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}
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