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android13/external/can-utils/isotprecv.c

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/*
* isotprecv.c
*
* 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 <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/can.h>
#include <linux/can/isotp.h>
#define NO_CAN_ID 0xFFFFFFFFU
#define BUFSIZE 5000 /* size > 4095 to check socket API internal checks */
void print_usage(char *prg)
{
fprintf(stderr, "\nUsage: %s [options] <CAN interface>\n", prg);
fprintf(stderr, "Options: -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>[:<rxaddr>] (extended addressing / opt. separate rxaddr)\n");
fprintf(stderr, " -p [tx]:[rx] (set and enable tx/rx padding bytes)\n");
fprintf(stderr, " -P <mode> (check rx padding for (l)ength (c)ontent (a)ll)\n");
fprintf(stderr, " -b <bs> (blocksize. 0 = off)\n");
fprintf(stderr, " -m <val> (STmin in ms/ns. See spec.)\n");
fprintf(stderr, " -f <time ns> (force rx stmin value in nanosecs)\n");
fprintf(stderr, " -w <num> (max. wait frame transmissions.)\n");
fprintf(stderr, " -l (loop: do not exit after pdu receiption.)\n");
fprintf(stderr, " -L <mtu>:<tx_dl>:<tx_flags> (link layer options for CAN FD)\n");
fprintf(stderr, "\nCAN IDs and addresses are given and expected in hexadecimal values.\n");
fprintf(stderr, "The pdu data is written on STDOUT in space separated ASCII hex values.\n");
fprintf(stderr, "\n");
}
int main(int argc, char **argv)
{
int s;
struct sockaddr_can addr;
struct ifreq ifr;
static struct can_isotp_options opts;
static struct can_isotp_fc_options fcopts;
static struct can_isotp_ll_options llopts;
int opt, i;
extern int optind, opterr, optopt;
__u32 force_rx_stmin = 0;
int loop = 0;
unsigned char msg[BUFSIZE];
int nbytes;
addr.can_addr.tp.tx_id = addr.can_addr.tp.rx_id = NO_CAN_ID;
while ((opt = getopt(argc, argv, "s:d:x:p:P:b:m:w:f:lL:?")) != -1) {
switch (opt) {
case 's':
addr.can_addr.tp.tx_id = strtoul(optarg, (char **)NULL, 16);
if (strlen(optarg) > 7)
addr.can_addr.tp.tx_id |= CAN_EFF_FLAG;
break;
case 'd':
addr.can_addr.tp.rx_id = strtoul(optarg, (char **)NULL, 16);
if (strlen(optarg) > 7)
addr.can_addr.tp.rx_id |= CAN_EFF_FLAG;
break;
case 'x':
{
int elements = sscanf(optarg, "%hhx:%hhx",
&opts.ext_address,
&opts.rx_ext_address);
if (elements == 1)
opts.flags |= CAN_ISOTP_EXTEND_ADDR;
else if (elements == 2)
opts.flags |= (CAN_ISOTP_EXTEND_ADDR | CAN_ISOTP_RX_EXT_ADDR);
else {
printf("incorrect extended addr values '%s'.\n", optarg);
print_usage(basename(argv[0]));
exit(0);
}
break;
}
case 'p':
{
int elements = sscanf(optarg, "%hhx:%hhx",
&opts.txpad_content,
&opts.rxpad_content);
if (elements == 1)
opts.flags |= CAN_ISOTP_TX_PADDING;
else if (elements == 2)
opts.flags |= (CAN_ISOTP_TX_PADDING | CAN_ISOTP_RX_PADDING);
else if (sscanf(optarg, ":%hhx", &opts.rxpad_content) == 1)
opts.flags |= CAN_ISOTP_RX_PADDING;
else {
printf("incorrect padding values '%s'.\n", optarg);
print_usage(basename(argv[0]));
exit(0);
}
break;
}
case 'P':
if (optarg[0] == 'l')
opts.flags |= CAN_ISOTP_CHK_PAD_LEN;
else if (optarg[0] == 'c')
opts.flags |= CAN_ISOTP_CHK_PAD_DATA;
else if (optarg[0] == 'a')
opts.flags |= (CAN_ISOTP_CHK_PAD_LEN | CAN_ISOTP_CHK_PAD_DATA);
else {
printf("unknown padding check option '%c'.\n", optarg[0]);
print_usage(basename(argv[0]));
exit(0);
}
break;
case 'b':
fcopts.bs = strtoul(optarg, (char **)NULL, 16) & 0xFF;
break;
case 'm':
fcopts.stmin = strtoul(optarg, (char **)NULL, 16) & 0xFF;
break;
case 'w':
fcopts.wftmax = strtoul(optarg, (char **)NULL, 16) & 0xFF;
break;
case 'f':
opts.flags |= CAN_ISOTP_FORCE_RXSTMIN;
force_rx_stmin = strtoul(optarg, (char **)NULL, 10);
break;
case 'l':
loop = 1;
break;
case 'L':
if (sscanf(optarg, "%hhu:%hhu:%hhu",
&llopts.mtu,
&llopts.tx_dl,
&llopts.tx_flags) != 3) {
printf("unknown link layer options '%s'.\n", optarg);
print_usage(basename(argv[0]));
exit(0);
}
break;
case '?':
print_usage(basename(argv[0]));
exit(0);
break;
default:
fprintf(stderr, "Unknown option %c\n", opt);
print_usage(basename(argv[0]));
exit(1);
break;
}
}
if ((argc - optind != 1) ||
(addr.can_addr.tp.tx_id == NO_CAN_ID) ||
(addr.can_addr.tp.rx_id == NO_CAN_ID)) {
print_usage(basename(argv[0]));
exit(1);
}
if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_ISOTP)) < 0) {
perror("socket");
exit(1);
}
setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_OPTS, &opts, sizeof(opts));
setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_RECV_FC, &fcopts, sizeof(fcopts));
if (llopts.tx_dl) {
if (setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_LL_OPTS, &llopts, sizeof(llopts)) < 0) {
perror("link layer sockopt");
exit(1);
}
}
if (opts.flags & CAN_ISOTP_FORCE_RXSTMIN)
setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_RX_STMIN, &force_rx_stmin, sizeof(force_rx_stmin));
addr.can_family = AF_CAN;
strcpy(ifr.ifr_name, argv[optind]);
ioctl(s, SIOCGIFINDEX, &ifr);
addr.can_ifindex = ifr.ifr_ifindex;
if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
close(s);
exit(1);
}
do {
nbytes = read(s, msg, BUFSIZE);
if (nbytes > 0 && nbytes < BUFSIZE)
for (i=0; i < nbytes; i++)
printf("%02X ", msg[i]);
printf("\n");
} while (loop);
close(s);
return 0;
}
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