608 lines
15 KiB
C
Executable File
608 lines
15 KiB
C
Executable File
/*
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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 <linux-can@vger.kernel.org>
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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 <stdint.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 <linux/can/error.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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const char hex_asc_upper[] = "0123456789ABCDEF";
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#define hex_asc_upper_lo(x) hex_asc_upper[((x) & 0x0F)]
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#define hex_asc_upper_hi(x) hex_asc_upper[((x) & 0xF0) >> 4]
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static inline void put_hex_byte(char *buf, __u8 byte)
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{
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buf[0] = hex_asc_upper_hi(byte);
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buf[1] = hex_asc_upper_lo(byte);
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}
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static inline void _put_id(char *buf, int end_offset, canid_t id)
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{
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/* build 3 (SFF) or 8 (EFF) digit CAN identifier */
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while (end_offset >= 0) {
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buf[end_offset--] = hex_asc_upper[id & 0xF];
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id >>= 4;
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}
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}
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#define put_sff_id(buf, id) _put_id(buf, 2, id)
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#define put_eff_id(buf, id) _put_id(buf, 7, id)
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/* CAN DLC to real data length conversion helpers */
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static const unsigned char dlc2len[] = {0, 1, 2, 3, 4, 5, 6, 7,
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8, 12, 16, 20, 24, 32, 48, 64};
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/* get data length from can_dlc with sanitized can_dlc */
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unsigned char can_dlc2len(unsigned char can_dlc)
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{
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return dlc2len[can_dlc & 0x0F];
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}
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static const unsigned char len2dlc[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, /* 0 - 8 */
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9, 9, 9, 9, /* 9 - 12 */
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10, 10, 10, 10, /* 13 - 16 */
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11, 11, 11, 11, /* 17 - 20 */
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12, 12, 12, 12, /* 21 - 24 */
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13, 13, 13, 13, 13, 13, 13, 13, /* 25 - 32 */
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14, 14, 14, 14, 14, 14, 14, 14, /* 33 - 40 */
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14, 14, 14, 14, 14, 14, 14, 14, /* 41 - 48 */
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15, 15, 15, 15, 15, 15, 15, 15, /* 49 - 56 */
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15, 15, 15, 15, 15, 15, 15, 15}; /* 57 - 64 */
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/* map the sanitized data length to an appropriate data length code */
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unsigned char can_len2dlc(unsigned char len)
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{
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if (len > 64)
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return 0xF;
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return len2dlc[len];
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}
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unsigned char 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 hexstring2data(char *arg, unsigned char *data, int maxdlen) {
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int len = strlen(arg);
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int i;
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unsigned char tmp;
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if (!len || len%2 || len > maxdlen*2)
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return 1;
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memset(data, 0, maxdlen);
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for (i=0; i < len/2; i++) {
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tmp = asc2nibble(*(arg+(2*i)));
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if (tmp > 0x0F)
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return 1;
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data[i] = (tmp << 4);
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tmp = asc2nibble(*(arg+(2*i)+1));
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if (tmp > 0x0F)
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return 1;
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data[i] |= tmp;
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}
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return 0;
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}
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int parse_canframe(char *cs, struct canfd_frame *cf) {
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/* documentation see lib.h */
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int i, idx, dlen, len;
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int maxdlen = CAN_MAX_DLEN;
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int ret = CAN_MTU;
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unsigned char 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 FD frame, e.g. LEN = 0 */
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if (len < 4)
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return 0;
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if (cs[3] == CANID_DELIM) { /* 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 0;
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cf->can_id |= (tmp << (2-i)*4);
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}
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} else 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 0;
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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
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return 0;
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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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/* check for optional DLC value for CAN 2.0B frames */
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if(cs[++idx] && (tmp = asc2nibble(cs[idx])) <= CAN_MAX_DLC)
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cf->len = tmp;
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return ret;
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}
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if (cs[idx] == CANID_DELIM) { /* CAN FD frame escape char '##' */
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maxdlen = CANFD_MAX_DLEN;
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ret = CANFD_MTU;
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/* CAN FD frame <canid>##<flags><data>* */
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if ((tmp = asc2nibble(cs[idx+1])) > 0x0F)
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return 0;
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cf->flags = tmp;
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idx += 2;
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}
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for (i=0, dlen=0; i < maxdlen; i++){
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if(cs[idx] == DATA_SEPERATOR) /* skip (optional) separator */
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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 0;
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cf->data[i] = (tmp << 4);
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if ((tmp = asc2nibble(cs[idx++])) > 0x0F)
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return 0;
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cf->data[i] |= tmp;
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dlen++;
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}
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cf->len = dlen;
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return ret;
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}
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void fprint_canframe(FILE *stream , struct canfd_frame *cf, char *eol, int sep, int maxdlen) {
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/* documentation see lib.h */
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char buf[CL_CFSZ]; /* max length */
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sprint_canframe(buf, cf, sep, maxdlen);
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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 canfd_frame *cf, int sep, int maxdlen) {
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/* documentation see lib.h */
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int i,offset;
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int len = (cf->len > maxdlen) ? maxdlen : cf->len;
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if (cf->can_id & CAN_ERR_FLAG) {
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put_eff_id(buf, cf->can_id & (CAN_ERR_MASK|CAN_ERR_FLAG));
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buf[8] = '#';
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offset = 9;
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} else if (cf->can_id & CAN_EFF_FLAG) {
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put_eff_id(buf, cf->can_id & CAN_EFF_MASK);
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buf[8] = '#';
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offset = 9;
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} else {
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put_sff_id(buf, cf->can_id & CAN_SFF_MASK);
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buf[3] = '#';
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offset = 4;
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}
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/* standard CAN frames may have RTR enabled. There are no ERR frames with RTR */
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if (maxdlen == CAN_MAX_DLEN && cf->can_id & CAN_RTR_FLAG) {
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buf[offset++] = 'R';
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/* print a given CAN 2.0B DLC if it's not zero */
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if (cf->len && cf->len <= CAN_MAX_DLC)
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buf[offset++] = hex_asc_upper[cf->len & 0xF];
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buf[offset] = 0;
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return;
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}
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if (maxdlen == CANFD_MAX_DLEN) {
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/* add CAN FD specific escape char and flags */
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buf[offset++] = '#';
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buf[offset++] = hex_asc_upper[cf->flags & 0xF];
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if (sep && len)
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buf[offset++] = '.';
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}
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for (i = 0; i < len; i++) {
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put_hex_byte(buf + offset, cf->data[i]);
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offset += 2;
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if (sep && (i+1 < len))
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buf[offset++] = '.';
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}
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buf[offset] = 0;
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}
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void fprint_long_canframe(FILE *stream , struct canfd_frame *cf, char *eol, int view, int maxdlen) {
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/* documentation see lib.h */
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char buf[CL_LONGCFSZ];
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sprint_long_canframe(buf, cf, view, maxdlen);
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fprintf(stream, "%s", buf);
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if ((view & CANLIB_VIEW_ERROR) && (cf->can_id & CAN_ERR_FLAG)) {
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snprintf_can_error_frame(buf, sizeof(buf), cf, "\n\t");
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fprintf(stream, "\n\t%s", buf);
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}
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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 canfd_frame *cf, int view, int maxdlen) {
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/* documentation see lib.h */
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int i, j, dlen, offset;
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int len = (cf->len > maxdlen)? maxdlen : cf->len;
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/* initialize space for CAN-ID and length information */
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memset(buf, ' ', 15);
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if (cf->can_id & CAN_ERR_FLAG) {
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put_eff_id(buf, 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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put_eff_id(buf, cf->can_id & CAN_EFF_MASK);
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offset = 10;
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} else {
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if (view & CANLIB_VIEW_INDENT_SFF) {
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put_sff_id(buf + 5, cf->can_id & CAN_SFF_MASK);
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offset = 10;
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} else {
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put_sff_id(buf, cf->can_id & CAN_SFF_MASK);
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offset = 5;
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}
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}
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/* The len value is sanitized by maxdlen (see above) */
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if (maxdlen == CAN_MAX_DLEN) {
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buf[offset + 1] = '[';
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buf[offset + 2] = len + '0';
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buf[offset + 3] = ']';
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/* standard CAN frames may have RTR enabled */
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if (cf->can_id & CAN_RTR_FLAG) {
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sprintf(buf+offset+5, " remote request");
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return;
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}
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} else {
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buf[offset] = '[';
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buf[offset + 1] = (len/10) + '0';
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buf[offset + 2] = (len%10) + '0';
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buf[offset + 3] = ']';
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}
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offset += 5;
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if (view & CANLIB_VIEW_BINARY) {
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dlen = 9; /* _10101010 */
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if (view & CANLIB_VIEW_SWAP) {
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for (i = len - 1; i >= 0; i--) {
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buf[offset++] = (i == len-1)?' ':SWAP_DELIMITER;
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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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} else {
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for (i = 0; i < len; 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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}
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} else {
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dlen = 3; /* _AA */
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if (view & CANLIB_VIEW_SWAP) {
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for (i = len - 1; i >= 0; i--) {
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if (i == len-1)
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buf[offset++] = ' ';
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else
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buf[offset++] = SWAP_DELIMITER;
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put_hex_byte(buf + offset, cf->data[i]);
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offset += 2;
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}
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} else {
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for (i = 0; i < len; i++) {
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buf[offset++] = ' ';
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put_hex_byte(buf + offset, cf->data[i]);
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offset += 2;
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}
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}
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}
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buf[offset] = 0; /* terminate string */
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/*
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* The ASCII & ERRORFRAME output is put at a fixed len behind the data.
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* For now we support ASCII output only for payload length up to 8 bytes.
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* Does it make sense to write 64 ASCII byte behind 64 ASCII HEX data on the console?
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*/
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if (len > CAN_MAX_DLEN)
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return;
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if (cf->can_id & CAN_ERR_FLAG)
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sprintf(buf+offset, "%*s", dlen*(8-len)+13, "ERRORFRAME");
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else if (view & CANLIB_VIEW_ASCII) {
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j = dlen*(8-len)+4;
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if (view & CANLIB_VIEW_SWAP) {
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sprintf(buf+offset, "%*s", j, "`");
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offset += j;
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for (i = len - 1; i >= 0; 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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} else {
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sprintf(buf+offset, "%*s", j, "'");
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offset += j;
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for (i = 0; i < len; 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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}
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static const char *error_classes[] = {
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"tx-timeout",
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"lost-arbitration",
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"controller-problem",
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"protocol-violation",
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"transceiver-status",
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"no-acknowledgement-on-tx",
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"bus-off",
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"bus-error",
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"restarted-after-bus-off",
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};
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static const char *controller_problems[] = {
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"rx-overflow",
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"tx-overflow",
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"rx-error-warning",
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"tx-error-warning",
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"rx-error-passive",
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"tx-error-passive",
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"back-to-error-active",
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};
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static const char *protocol_violation_types[] = {
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"single-bit-error",
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"frame-format-error",
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"bit-stuffing-error",
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"tx-dominant-bit-error",
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"tx-recessive-bit-error",
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"bus-overload",
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"active-error",
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"error-on-tx",
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};
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static const char *protocol_violation_locations[] = {
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"unspecified",
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"unspecified",
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"id.28-to-id.28",
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"start-of-frame",
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"bit-srtr",
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"bit-ide",
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"id.20-to-id.18",
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"id.17-to-id.13",
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"crc-sequence",
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"reserved-bit-0",
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"data-field",
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"data-length-code",
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"bit-rtr",
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"reserved-bit-1",
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"id.4-to-id.0",
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"id.12-to-id.5",
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"unspecified",
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"active-error-flag",
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"intermission",
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"tolerate-dominant-bits",
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"unspecified",
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"unspecified",
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"passive-error-flag",
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"error-delimiter",
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"crc-delimiter",
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"acknowledge-slot",
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"end-of-frame",
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"acknowledge-delimiter",
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"overload-flag",
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"unspecified",
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"unspecified",
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"unspecified",
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};
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#endif
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static int snprintf_error_data(char *buf, size_t len, uint8_t err,
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const char **arr, int arr_len)
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{
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int i, n = 0, count = 0;
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if (!err || len <= 0)
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return 0;
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|
|
for (i = 0; i < arr_len; i++) {
|
|
if (err & (1 << i)) {
|
|
if (count)
|
|
n += snprintf(buf + n, len - n, ",");
|
|
n += snprintf(buf + n, len - n, "%s", arr[i]);
|
|
count++;
|
|
}
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
static int snprintf_error_lostarb(char *buf, size_t len, struct canfd_frame *cf)
|
|
{
|
|
if (len <= 0)
|
|
return 0;
|
|
return snprintf(buf, len, "{at bit %d}", cf->data[0]);
|
|
}
|
|
|
|
static int snprintf_error_ctrl(char *buf, size_t len, struct canfd_frame *cf)
|
|
{
|
|
int n = 0;
|
|
|
|
if (len <= 0)
|
|
return 0;
|
|
|
|
n += snprintf(buf + n, len - n, "{");
|
|
n += snprintf_error_data(buf + n, len - n, cf->data[1],
|
|
controller_problems,
|
|
ARRAY_SIZE(controller_problems));
|
|
n += snprintf(buf + n, len - n, "}");
|
|
|
|
return n;
|
|
}
|
|
|
|
static int snprintf_error_prot(char *buf, size_t len, struct canfd_frame *cf)
|
|
{
|
|
int n = 0;
|
|
|
|
if (len <= 0)
|
|
return 0;
|
|
|
|
n += snprintf(buf + n, len - n, "{{");
|
|
n += snprintf_error_data(buf + n, len - n, cf->data[2],
|
|
protocol_violation_types,
|
|
ARRAY_SIZE(protocol_violation_types));
|
|
n += snprintf(buf + n, len - n, "}{");
|
|
if (cf->data[3] > 0 &&
|
|
cf->data[3] < ARRAY_SIZE(protocol_violation_locations))
|
|
n += snprintf(buf + n, len - n, "%s",
|
|
protocol_violation_locations[cf->data[3]]);
|
|
n += snprintf(buf + n, len - n, "}}");
|
|
|
|
return n;
|
|
}
|
|
|
|
void snprintf_can_error_frame(char *buf, size_t len, struct canfd_frame *cf,
|
|
char* sep)
|
|
{
|
|
canid_t class, mask;
|
|
unsigned int i, n = 0, classes = 0;
|
|
char *defsep = ",";
|
|
|
|
if (!(cf->can_id & CAN_ERR_FLAG))
|
|
return;
|
|
|
|
class = cf->can_id & CAN_EFF_MASK;
|
|
if (class > (1 << ARRAY_SIZE(error_classes))) {
|
|
fprintf(stderr, "Error class %#x is invalid\n", class);
|
|
return;
|
|
}
|
|
|
|
if (!sep)
|
|
sep = defsep;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(error_classes); i++) {
|
|
mask = 1 << i;
|
|
if (class & mask) {
|
|
if (classes)
|
|
n += snprintf(buf + n, len - n, "%s", sep);
|
|
n += snprintf(buf + n, len - n, "%s", error_classes[i]);
|
|
if (mask == CAN_ERR_LOSTARB)
|
|
n += snprintf_error_lostarb(buf + n, len - n,
|
|
cf);
|
|
if (mask == CAN_ERR_CRTL)
|
|
n += snprintf_error_ctrl(buf + n, len - n, cf);
|
|
if (mask == CAN_ERR_PROT)
|
|
n += snprintf_error_prot(buf + n, len - n, cf);
|
|
classes++;
|
|
}
|
|
}
|
|
|
|
if (cf->data[6] || cf->data[7]) {
|
|
n += snprintf(buf + n, len - n, "%s", sep);
|
|
n += snprintf(buf + n, len - n, "error-counter-tx-rx{{%d}{%d}}",
|
|
cf->data[6], cf->data[7]);
|
|
}
|
|
}
|