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HiepLM
2025-12-29 16:21:22 +07:00
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Devices/Libraries/Systems/can-utils/isotpsniffer.c Executable file
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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
/*
* isotpsniffer.c - dump ISO15765-2 datagrams using PF_CAN isotp protocol
*
* Copyright (c) 2008 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 <ctype.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include "terminal.h"
#include <linux/can.h>
#include <linux/can/isotp.h>
#include <linux/sockios.h>
#define NO_CAN_ID 0xFFFFFFFFU
#define FORMAT_HEX 1
#define FORMAT_ASCII 2
#define FORMAT_DEFAULT (FORMAT_ASCII | FORMAT_HEX)
void print_usage(char *prg)
{
fprintf(stderr, "\nUsage: %s [options] <CAN interface>\n", prg);
fprintf(stderr, "Options:\n");
fprintf(stderr, " -s <can_id> (source can_id. Use 8 digits for extended IDs)\n");
fprintf(stderr, " -d <can_id> (destination can_id. Use 8 digits for extended IDs)\n");
fprintf(stderr, " -x <addr> (extended addressing mode)\n");
fprintf(stderr, " -X <addr> (extended addressing mode - rx addr)\n");
fprintf(stderr, " -c (color mode)\n");
fprintf(stderr, " -t <type> (timestamp: (a)bsolute/(d)elta/(z)ero/(A)bsolute w date)\n");
fprintf(stderr, " -f <format> (1 = HEX, 2 = ASCII, 3 = HEX & ASCII - default: %d)\n", FORMAT_DEFAULT);
fprintf(stderr, " -L (set link layer options for CAN FD)\n");
fprintf(stderr, " -h <len> (head: print only first <len> bytes)\n");
fprintf(stderr, "\nCAN IDs and addresses are given and expected in hexadecimal values.\n");
fprintf(stderr, "\n");
}
void printbuf(unsigned char *buffer, int nbytes, int color, int timestamp,
int format, struct timeval *tv, struct timeval *last_tv,
canid_t src, int socket, char *candevice, int head)
{
int i;
if (color == 1)
printf("%s", FGRED);
if (color == 2)
printf("%s", FGBLUE);
if (timestamp) {
ioctl(socket, SIOCGSTAMP, tv);
switch (timestamp) {
case 'a': /* absolute with timestamp */
printf("(%llu.%06llu) ", (unsigned long long)tv->tv_sec, (unsigned long long)tv->tv_usec);
break;
case 'A': /* absolute with date */
{
struct tm tm;
char timestring[25];
tm = *localtime(&tv->tv_sec);
strftime(timestring, 24, "%Y-%m-%d %H:%M:%S", &tm);
printf("(%s.%06llu) ", timestring, (unsigned long long)tv->tv_usec);
}
break;
case 'd': /* delta */
case 'z': /* starting with zero */
{
struct timeval diff;
if (last_tv->tv_sec == 0) /* first init */
*last_tv = *tv;
diff.tv_sec = tv->tv_sec - last_tv->tv_sec;
diff.tv_usec = tv->tv_usec - last_tv->tv_usec;
if (diff.tv_usec < 0)
diff.tv_sec--, diff.tv_usec += 1000000;
if (diff.tv_sec < 0)
diff.tv_sec = diff.tv_usec = 0;
printf("(%llu.%06llu) ", (unsigned long long)diff.tv_sec, (unsigned long long)diff.tv_usec);
if (timestamp == 'd')
*last_tv = *tv; /* update for delta calculation */
}
break;
default: /* no timestamp output */
break;
}
}
/* the source socket gets pdu data from the destination id */
printf(" %s %03X [%d] ", candevice, src & CAN_EFF_MASK, nbytes);
if (format & FORMAT_HEX) {
for (i=0; i<nbytes; i++) {
printf("%02X ", buffer[i]);
if (head && i+1 >= head) {
printf("... ");
break;
}
}
if (format & FORMAT_ASCII)
printf(" - ");
}
if (format & FORMAT_ASCII) {
printf("'");
for (i=0; i<nbytes; i++) {
if (isprint(buffer[i]))
printf("%c", buffer[i]);
else
printf(".");
if (head && i+1 >= head)
break;
}
printf("'");
if (head && i+1 >= head)
printf(" ... ");
}
if (color)
printf("%s", ATTRESET);
printf("\n");
fflush(stdout);
}
int main(int argc, char **argv)
{
fd_set rdfs;
int s = -1, t = -1;
struct sockaddr_can addr;
char if_name[IFNAMSIZ];
static struct can_isotp_options opts;
static struct can_isotp_ll_options llopts;
int r = 0;
int opt, quit = 0;
int color = 0;
int head = 0;
int timestamp = 0;
int format = FORMAT_DEFAULT;
canid_t src = NO_CAN_ID;
canid_t dst = NO_CAN_ID;
extern int optind, opterr, optopt;
static struct timeval tv, last_tv;
unsigned char buffer[4096];
int nbytes;
while ((opt = getopt(argc, argv, "s:d:x:X:h:ct:f:L?")) != -1) {
switch (opt) {
case 's':
src = strtoul(optarg, NULL, 16);
if (strlen(optarg) > 7)
src |= CAN_EFF_FLAG;
break;
case 'd':
dst = strtoul(optarg, NULL, 16);
if (strlen(optarg) > 7)
dst |= CAN_EFF_FLAG;
break;
case 'x':
opts.flags |= CAN_ISOTP_EXTEND_ADDR;
opts.ext_address = strtoul(optarg, NULL, 16) & 0xFF;
break;
case 'X':
opts.flags |= CAN_ISOTP_RX_EXT_ADDR;
opts.rx_ext_address = strtoul(optarg, NULL, 16) & 0xFF;
break;
case 'f':
format = (atoi(optarg) & (FORMAT_ASCII | FORMAT_HEX));
break;
case 'L':
llopts.mtu = CANFD_MTU;
llopts.tx_dl = CANFD_MAX_DLEN;
llopts.tx_flags = CANFD_BRS;
break;
case 'h':
head = atoi(optarg);
break;
case 'c':
color = 1;
break;
case 't':
timestamp = optarg[0];
if ((timestamp != 'a') && (timestamp != 'A') &&
(timestamp != 'd') && (timestamp != 'z')) {
printf("%s: unknown timestamp mode '%c' - ignored\n",
basename(argv[0]), optarg[0]);
timestamp = 0;
}
break;
case '?':
print_usage(basename(argv[0]));
goto out;
default:
fprintf(stderr, "Unknown option %c\n", opt);
print_usage(basename(argv[0]));
goto out;
}
}
if ((argc - optind) != 1 || src == NO_CAN_ID || dst == NO_CAN_ID) {
print_usage(basename(argv[0]));
r = 1;
goto out;
}
if ((opts.flags & CAN_ISOTP_RX_EXT_ADDR) && (!(opts.flags & CAN_ISOTP_EXTEND_ADDR))) {
print_usage(basename(argv[0]));
r = 1;
goto out;
}
if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_ISOTP)) < 0) {
perror("socket");
r = 1;
goto out;
}
if ((t = socket(PF_CAN, SOCK_DGRAM, CAN_ISOTP)) < 0) {
perror("socket");
r = 1;
goto out;
}
opts.flags |= CAN_ISOTP_LISTEN_MODE;
strncpy(if_name, argv[optind], IFNAMSIZ - 1);
if_name[IFNAMSIZ - 1] = '\0';
addr.can_family = AF_CAN;
addr.can_ifindex = if_nametoindex(if_name);
if (!addr.can_ifindex) {
perror("if_nametoindex");
r = 1;
goto out;
}
if (setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_OPTS, &opts, sizeof(opts)) < 0) {
perror("setsockopt");
r = 1;
goto out;
}
if ((llopts.mtu) && (setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_LL_OPTS, &llopts, sizeof(llopts))) < 0) {
perror("setsockopt");
r = 1;
goto out;
}
addr.can_addr.tp.tx_id = src;
addr.can_addr.tp.rx_id = dst;
if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
r = 1;
goto out;
}
if (opts.flags & CAN_ISOTP_RX_EXT_ADDR) {
/* flip extended address info due to separate rx ext addr */
__u8 tmpext;
tmpext = opts.ext_address;
opts.ext_address = opts.rx_ext_address;
opts.rx_ext_address = tmpext;
}
if (setsockopt(t, SOL_CAN_ISOTP, CAN_ISOTP_OPTS, &opts, sizeof(opts)) < 0) {
perror("setsockopt");
r = 1;
goto out;
}
if ((llopts.mtu) && (setsockopt(t, SOL_CAN_ISOTP, CAN_ISOTP_LL_OPTS, &llopts, sizeof(llopts))) < 0) {
perror("setsockopt");
r = 1;
goto out;
}
addr.can_addr.tp.tx_id = dst;
addr.can_addr.tp.rx_id = src;
if (bind(t, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
r = 1;
goto out;
}
while (!quit) {
FD_ZERO(&rdfs);
FD_SET(s, &rdfs);
FD_SET(t, &rdfs);
FD_SET(0, &rdfs);
if ((nbytes = select(t+1, &rdfs, NULL, NULL, NULL)) < 0) {
perror("select");
continue;
}
if (FD_ISSET(0, &rdfs)) {
getchar();
quit = 1;
printf("quit due to keyboard input.\n");
}
if (FD_ISSET(s, &rdfs)) {
nbytes = read(s, buffer, 4096);
if (nbytes < 0) {
perror("read socket s");
r = 1;
goto out;
}
if (nbytes > 4095) {
r = 1;
goto out;
}
printbuf(buffer, nbytes, color?2:0, timestamp, format,
&tv, &last_tv, dst, s, if_name, head);
}
if (FD_ISSET(t, &rdfs)) {
nbytes = read(t, buffer, 4096);
if (nbytes < 0) {
perror("read socket t");
r = 1;
goto out;
}
if (nbytes > 4095) {
r = 1;
goto out;
}
printbuf(buffer, nbytes, color?1:0, timestamp, format,
&tv, &last_tv, src, t, if_name, head);
}
}
out:
if (s != -1)
close(s);
if (t != -1)
close(t);
return r;
}