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can-utils/asc2log.c

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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
/*
* asc2log.c - convert ASC logfile to compact CAN frame logfile
*
* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Volkswagen nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* Alternatively, provided that this notice is retained in full, this
* software may be distributed under the terms of the GNU General
* Public License ("GPL") version 2, in which case the provisions of the
* GPL apply INSTEAD OF those given above.
*
* The provided data structures and external interfaces from this code
* are not restricted to be used by modules with a GPL compatible license.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* Send feedback to <linux-can@vger.kernel.org>
*
*/
#include <libgen.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <limits.h>
#include <linux/can.h>
#include <linux/can/error.h>
#include <net/if.h>
#include "lib.h"
#define BUFLEN 400 /* CAN FD mode lines can be pretty long */
extern int optind, opterr, optopt;
void print_usage(char *prg)
{
fprintf(stderr, "%s - convert ASC logfile to compact CAN frame logfile.\n", prg);
fprintf(stderr, "Usage: %s\n", prg);
fprintf(stderr, "Options:\n");
fprintf(stderr, "\t-I <infile>\t(default stdin)\n");
fprintf(stderr, "\t-O <outfile>\t(default stdout)\n");
}
void prframe(FILE *file, struct timeval *tv, int dev, struct canfd_frame *cf, char *extra_info)
{
static char abuf[BUFLEN];
fprintf(file, "(%llu.%06llu) ", (unsigned long long)tv->tv_sec, (unsigned long long)tv->tv_usec);
if (dev > 0)
fprintf(file, "can%d ", dev-1);
else
fprintf(file, "canX ");
snprintf_canframe(abuf, sizeof(abuf), (cu_t *)cf, 0);
fprintf(file, "%s%s", abuf, extra_info);
}
void get_can_id(struct canfd_frame *cf, char *idstring, int base)
{
if (idstring[strlen(idstring)-1] == 'x') {
cf->can_id = CAN_EFF_FLAG;
idstring[strlen(idstring)-1] = 0;
} else
cf->can_id = 0;
cf->can_id |= strtoul(idstring, NULL, base);
}
void calc_tv(struct timeval *tv, struct timeval *read_tv,
struct timeval *date_tv, char timestamps, int dplace)
{
if (dplace == 4) /* shift values having only 4 decimal places */
read_tv->tv_usec *= 100; /* and need for 6 */
if (dplace == 5) /* shift values having only 5 decimal places */
read_tv->tv_usec *= 10; /* and need for 6 */
if (timestamps == 'a') { /* absolute */
tv->tv_sec = date_tv->tv_sec + read_tv->tv_sec;
tv->tv_usec = date_tv->tv_usec + read_tv->tv_usec;
} else { /* relative */
if (((!tv->tv_sec) && (!tv->tv_usec)) &&
(date_tv->tv_sec || date_tv->tv_usec)) {
tv->tv_sec = date_tv->tv_sec; /* initial date/time */
tv->tv_usec = date_tv->tv_usec;
}
tv->tv_sec += read_tv->tv_sec;
tv->tv_usec += read_tv->tv_usec;
}
if (tv->tv_usec >= 1000000) {
tv->tv_usec -= 1000000;
tv->tv_sec++;
}
}
void eval_can(char* buf, struct timeval *date_tvp, char timestamps, char base, int dplace, FILE *outfile)
{
int interface;
static struct timeval tv; /* current frame timestamp */
static struct timeval read_tv; /* frame timestamp from ASC file */
struct canfd_frame cf = { 0 };
struct can_frame *ccf = (struct can_frame *)&cf; /* for len8_dlc */
char rtr;
int dlc = 0;
int len = 0;
int data[8];
char tmp1[BUFLEN];
char dir[3]; /* 'Rx' or 'Tx' plus terminating zero */
char *extra_info;
int i, items;
unsigned long long sec, usec;
/* check for ErrorFrames */
if (sscanf(buf, "%llu.%llu %d %s",
&sec, &usec,
&interface, tmp1) == 4) {
read_tv.tv_sec = sec;
read_tv.tv_usec = usec;
if (!strncmp(tmp1, "ErrorFrame", strlen("ErrorFrame"))) {
/* do not know more than 'Error' */
cf.can_id = (CAN_ERR_FLAG | CAN_ERR_BUSERROR);
cf.len = CAN_ERR_DLC;
calc_tv(&tv, &read_tv, date_tvp, timestamps, dplace);
prframe(outfile, &tv, interface, &cf, "\n");
fflush(outfile);
return;
}
}
/* 0.002367 1 390x Rx d 8 17 00 14 00 C0 00 08 00 */
/* check for CAN frames with (hexa)decimal values */
if (base == 'h')
items = sscanf(buf, "%llu.%llu %d %s %2s %c %x %x %x %x %x %x %x %x %x",
&sec, &usec, &interface,
tmp1, dir, &rtr, &dlc,
&data[0], &data[1], &data[2], &data[3],
&data[4], &data[5], &data[6], &data[7]);
else
items = sscanf(buf, "%llu.%llu %d %s %2s %c %x %d %d %d %d %d %d %d %d",
&sec, &usec, &interface,
tmp1, dir, &rtr, &dlc,
&data[0], &data[1], &data[2], &data[3],
&data[4], &data[5], &data[6], &data[7]);
read_tv.tv_sec = sec;
read_tv.tv_usec = usec;
if (items < 7 ) /* make sure we've read the dlc */
return;
/* dlc is one character hex value 0..F */
if (dlc > CAN_MAX_RAW_DLC)
return;
/* retrieve real data length */
if (dlc > CAN_MAX_DLC)
len = CAN_MAX_DLEN;
else
len = dlc;
if ((items == len + 7 ) || /* data frame */
((items == 6) && (rtr == 'r')) || /* RTR without DLC */
((items == 7) && (rtr == 'r'))) { /* RTR with DLC */
/* check for CAN ID with (hexa)decimal value */
if (base == 'h')
get_can_id(&cf, tmp1, 16);
else
get_can_id(&cf, tmp1, 10);
/* dlc > 8 => len == CAN_MAX_DLEN => fill len8_dlc value */
if (dlc > CAN_MAX_DLC)
ccf->len8_dlc = dlc;
if (strlen(dir) != 2) /* "Rx" or "Tx" */
return;
/* check for signed integer overflow */
if (dplace == 4 && read_tv.tv_usec >= INT_MAX / 100)
return;
if (dplace == 5 && read_tv.tv_usec >= INT_MAX / 10)
return;
if (dir[0] == 'R')
extra_info = " R\n";
else
extra_info = " T\n";
cf.len = len;
if (rtr == 'r')
cf.can_id |= CAN_RTR_FLAG;
else
for (i = 0; i < len; i++)
cf.data[i] = data[i] & 0xFFU;
calc_tv(&tv, &read_tv, date_tvp, timestamps, dplace);
prframe(outfile, &tv, interface, &cf, extra_info);
fflush(outfile);
}
}
void eval_canfd(char* buf, struct timeval *date_tvp, char timestamps, int dplace, FILE *outfile)
{
int interface;
static struct timeval tv; /* current frame timestamp */
static struct timeval read_tv; /* frame timestamp from ASC file */
struct canfd_frame cf = { 0 };
unsigned char brs, esi, ctmp;
unsigned int flags;
int dlc, dlen = 0;
char tmp1[BUFLEN];
char dir[3]; /* 'Rx' or 'Tx' plus terminating zero */
char *extra_info;
char *ptr;
int i;
unsigned long long sec, usec;
/* The CANFD format is mainly in hex representation but <DataLength>
and probably some content we skip anyway. Don't trust the docs! */
/* 21.671796 CANFD 1 Tx 11 msgCanFdFr1 1 0 a 16 \
00 00 00 00 00 00 00 00 00 00 00 00 00 00 59 c0 \
100000 214 223040 80000000 46500250 460a0250 20011736 20010205 */
/* check for valid line without symbolic name */
if (sscanf(buf, "%llu.%llu %*s %d %2s %s %hhx %hhx %x %d ",
&sec, &usec, &interface,
dir, tmp1, &brs, &esi, &dlc, &dlen) != 9) {
/* check for valid line with a symbolic name */
if (sscanf(buf, "%llu.%llu %*s %d %2s %s %*s %hhx %hhx %x %d ",
&sec, &usec, &interface,
dir, tmp1, &brs, &esi, &dlc, &dlen) != 9) {
/* no valid CANFD format pattern */
return;
}
}
read_tv.tv_sec = sec;
read_tv.tv_usec = usec;
/* check for allowed (unsigned) value ranges */
if ((dlen > CANFD_MAX_DLEN) || (dlc > CANFD_MAX_DLC) ||
(brs > 1) || (esi > 1))
return;
if (strlen(dir) != 2) /* "Rx" or "Tx" */
return;
/* check for signed integer overflow */
if (dplace == 4 && read_tv.tv_usec >= INT_MAX / 100)
return;
/* check for signed integer overflow */
if (dplace == 5 && read_tv.tv_usec >= INT_MAX / 10)
return;
if (dir[0] == 'R')
extra_info = " R\n";
else
extra_info = " T\n";
/* don't trust ASCII content - sanitize data length */
if (dlen != can_fd_dlc2len(can_fd_len2dlc(dlen)))
return;
get_can_id(&cf, tmp1, 16);
/* now search for the beginning of the data[] content */
sprintf(tmp1, " %x %x %x %2d ", brs, esi, dlc, dlen);
/* search for the pattern generated by real data */
ptr = strcasestr(buf, tmp1);
if (ptr == NULL)
return;
ptr += strlen(tmp1); /* start of ASCII hex frame data */
cf.len = dlen;
for (i = 0; i < dlen; i++) {
ctmp = asc2nibble(ptr[0]);
if (ctmp > 0x0F)
return;
cf.data[i] = (ctmp << 4);
ctmp = asc2nibble(ptr[1]);
if (ctmp > 0x0F)
return;
cf.data[i] |= ctmp;
ptr += 3; /* start of next ASCII hex byte */
}
/* skip MessageDuration and MessageLength to get Flags value */
if (sscanf(ptr, " %*x %*x %x ", &flags) != 1)
return;
/* relevant flags in Flags field */
#define ASC_F_RTR 0x00000010
#define ASC_F_FDF 0x00001000
#define ASC_F_BRS 0x00002000
#define ASC_F_ESI 0x00004000
if (flags & ASC_F_FDF) {
cf.flags = CANFD_FDF;
if (flags & ASC_F_BRS)
cf.flags |= CANFD_BRS;
if (flags & ASC_F_ESI)
cf.flags |= CANFD_ESI;
} else {
/* yes. The 'CANFD' format supports classic CAN content! */
if (flags & ASC_F_RTR) {
cf.can_id |= CAN_RTR_FLAG;
/* dlen is always 0 for classic CAN RTR frames
but the DLC value is valid in RTR cases */
cf.len = dlc;
/* sanitize payload length value */
if (dlc > CAN_MAX_DLEN)
cf.len = CAN_MAX_DLEN;
}
/* check for extra DLC when having a Classic CAN with 8 bytes payload */
if ((cf.len == CAN_MAX_DLEN) && (dlc > CAN_MAX_DLEN) && (dlc <= CAN_MAX_RAW_DLC)) {
struct can_frame *ccf = (struct can_frame *)&cf;
ccf->len8_dlc = dlc;
}
}
calc_tv(&tv, &read_tv, date_tvp, timestamps, dplace);
prframe(outfile, &tv, interface, &cf, extra_info);
fflush(outfile);
/* No support for really strange CANFD ErrorFrames format m( */
}
int get_date(struct timeval *tv, char *date)
{
struct tm tms;
unsigned int msecs = 0;
if (strcasestr(date, " pm ") != NULL) {
/* assume EN/US date due to existing am/pm field */
if (!setlocale(LC_TIME, "en_US")) {
fprintf(stderr, "Setting locale to 'en_US' failed!\n");
return 1;
}
if (!strptime(date, "%B %d %I:%M:%S %p %Y", &tms)) {
/* The string might contain a milliseconds value which strptime()
does not support. So we read the ms value into the year variable
before parsing the real year value (hack) */
if (!strptime(date, "%B %d %I:%M:%S.%Y %p %Y", &tms))
return 1;
sscanf(date, "%*s %*d %*d:%*d:%*d.%3u ", &msecs);
}
} else {
/* assume DE date due to non existing am/pm field */
if (!setlocale(LC_TIME, "de_DE")) {
fprintf(stderr, "Setting locale to 'de_DE' failed!\n");
return 1;
}
if (!strptime(date, "%B %d %H:%M:%S %Y", &tms)) {
/* The string might contain a milliseconds value which strptime()
does not support. So we read the ms value into the year variable
before parsing the real year value (hack) */
if (!strptime(date, "%B %d %H:%M:%S.%Y %Y", &tms))
return 1;
sscanf(date, "%*s %*d %*d:%*d:%*d.%3u ", &msecs);
}
}
//printf("h %d m %d s %d ms %03d d %d m %d y %d\n",
//tms.tm_hour, tms.tm_min, tms.tm_sec, msecs,
//tms.tm_mday, tms.tm_mon+1, tms.tm_year+1900);
tv->tv_sec = mktime(&tms);
tv->tv_usec = msecs * 1000;
if (tv->tv_sec < 0)
return 1;
return 0;
}
int main(int argc, char **argv)
{
char buf[BUFLEN], tmp1[BUFLEN], tmp2[BUFLEN];
FILE *infile = stdin;
FILE *outfile = stdout;
static int verbose;
static struct timeval date_tv; /* date of the ASC file */
static int dplace; /* decimal place 4, 5 or 6 or uninitialized */
static char base; /* 'd'ec or 'h'ex */
static char timestamps; /* 'a'bsolute or 'r'elative */
int opt;
unsigned long long sec, usec;
while ((opt = getopt(argc, argv, "I:O:v?")) != -1) {
switch (opt) {
case 'I':
infile = fopen(optarg, "r");
if (!infile) {
perror("infile");
return 1;
}
break;
case 'O':
outfile = fopen(optarg, "w");
if (!outfile) {
perror("outfile");
return 1;
}
break;
case 'v':
verbose = 1;
break;
case '?':
print_usage(basename(argv[0]));
return 0;
break;
default:
fprintf(stderr, "Unknown option %c\n", opt);
print_usage(basename(argv[0]));
return 1;
break;
}
}
while (fgets(buf, BUFLEN-1, infile)) {
if (!dplace) { /* the representation of a valid CAN frame not known */
/* check for base and timestamp entries in the header */
if ((!base) &&
(sscanf(buf, "base %s timestamps %s", tmp1, tmp2) == 2)) {
base = tmp1[0];
timestamps = tmp2[0];
if (verbose)
printf("base %c timestamps %c\n", base, timestamps);
if ((base != 'h') && (base != 'd')) {
printf("invalid base %s (must be 'hex' or 'dez')!\n",
tmp1);
return 1;
}
if ((timestamps != 'a') && (timestamps != 'r')) {
printf("invalid timestamps %s (must be 'absolute'"
" or 'relative')!\n", tmp2);
return 1;
}
continue;
}
/* check for the original logging date in the header */
if ((!date_tv.tv_sec) &&
(!strncmp(buf, "date", 4))) {
if (get_date(&date_tv, &buf[9])) { /* skip 'date day ' */
fprintf(stderr, "Not able to determine original log "
"file date. Using current time.\n");
/* use current date as default */
gettimeofday(&date_tv, NULL);
}
if (verbose)
printf("date %llu => %s", (unsigned long long)date_tv.tv_sec, ctime(&date_tv.tv_sec));
continue;
}
/* check for decimal places length in valid CAN frames */
if (sscanf(buf, "%llu.%s %s ", &sec, tmp2,
tmp1) != 3)
continue; /* dplace remains zero until first found CAN frame */
dplace = strlen(tmp2);
if (verbose)
printf("decimal place %d, e.g. '%s'\n", dplace,
tmp2);
if (dplace < 4 || dplace > 6) {
printf("invalid dplace %d (must be 4, 5 or 6)!\n",
dplace);
return 1;
}
}
/* the representation of a valid CAN frame is known here */
/* so try to get CAN frames and ErrorFrames and convert them */
/* check classic CAN format or the CANFD tag which can take both types */
if (sscanf(buf, "%llu.%llu %s ", &sec, &usec, tmp1) == 3){
if (!strncmp(tmp1, "CANFD", 5))
eval_canfd(buf, &date_tv, timestamps, dplace, outfile);
else
eval_can(buf, &date_tv, timestamps, base, dplace, outfile);
}
}
fclose(outfile);
fclose(infile);
return 0;
}
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