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android13/external/can-utils/cansniffer.c

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/*
* cansniffer.c
*
* 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <ctype.h>
#include <libgen.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <net/if.h>
#include <linux/can.h>
#include <linux/can/bcm.h>
#include "terminal.h"
#define U64_DATA(p) (*(unsigned long long*)(p)->data)
#define SETFNAME "sniffset."
#define ANYDEV "any"
/* flags */
#define ENABLE 1 /* by filter or user */
#define DISPLAY 2 /* is on the screen */
#define UPDATE 4 /* needs to be printed on the screen */
#define CLRSCR 8 /* clear screen in next loop */
/* flags testing & setting */
#define is_set(id, flag) (sniftab[id].flags & flag)
#define is_clr(id, flag) (!(sniftab[id].flags & flag))
#define do_set(id, flag) (sniftab[id].flags |= flag)
#define do_clr(id, flag) (sniftab[id].flags &= ~flag)
/* time defaults */
#define TIMEOUT 500 /* in 10ms */
#define HOLD 100 /* in 10ms */
#define LOOP 20 /* in 10ms */
#define ATTCOLOR ATTBOLD FGRED
#define STARTLINESTR "XX delta ID data ... "
struct snif {
int flags;
long hold;
long timeout;
struct timeval laststamp;
struct timeval currstamp;
struct can_frame last;
struct can_frame current;
struct can_frame marker;
struct can_frame notch;
} sniftab[2048];
extern int optind, opterr, optopt;
static int running = 1;
static int clearscreen = 1;
static int notch;
static int filter_id_only;
static long timeout = TIMEOUT;
static long hold = HOLD;
static long loop = LOOP;
static unsigned char binary;
static unsigned char binary_gap;
static unsigned char color;
static char *interface;
void rx_setup (int fd, int id);
void rx_delete (int fd, int id);
void print_snifline(int id);
int handle_keyb(int fd);
int handle_bcm(int fd, long currcms);
int handle_timeo(int fd, long currcms);
void writesettings(char* name);
void readsettings(char* name, int sockfd);
void print_usage(char *prg)
{
const char manual [] = {
"commands that can be entered at runtime:\n"
"\n"
"q<ENTER> - quit\n"
"b<ENTER> - toggle binary / HEX-ASCII output\n"
"B<ENTER> - toggle binary with gap / HEX-ASCII output (exceeds 80 chars!)\n"
"c<ENTER> - toggle color mode\n"
"#<ENTER> - notch currently marked/changed bits (can be used repeatedly)\n"
"*<ENTER> - clear notched marked\n"
"rMYNAME<ENTER> - read settings file (filter/notch)\n"
"wMYNAME<ENTER> - write settings file (filter/notch)\n"
"+FILTER<ENTER> - add CAN-IDs to sniff\n"
"-FILTER<ENTER> - remove CAN-IDs to sniff\n"
"\n"
"FILTER can be a single CAN-ID or a CAN-ID/Bitmask:\n"
"+1F5<ENTER> - add CAN-ID 0x1F5\n"
"-42E<ENTER> - remove CAN-ID 0x42E\n"
"-42E7FF<ENTER> - remove CAN-ID 0x42E (using Bitmask)\n"
"-500700<ENTER> - remove CAN-IDs 0x500 - 0x5FF\n"
"+400600<ENTER> - add CAN-IDs 0x400 - 0x5FF\n"
"+000000<ENTER> - add all CAN-IDs\n"
"-000000<ENTER> - remove all CAN-IDs\n"
"\n"
"if (id & filter) == (sniff-id & filter) the action (+/-) is performed,\n"
"which is quite easy when the filter is 000\n"
"\n"
};
fprintf(stderr, "\nUsage: %s [can-interface]\n", prg);
fprintf(stderr, "Options: -m <mask> (initial FILTER default 0x00000000)\n");
fprintf(stderr, " -v <value> (initial FILTER default 0x00000000)\n");
fprintf(stderr, " -q (quiet - all IDs deactivated)\n");
fprintf(stderr, " -r <name> (read %sname from file)\n", SETFNAME);
fprintf(stderr, " -b (start with binary mode)\n");
fprintf(stderr, " -B (start with binary mode with gap - exceeds 80 chars!)\n");
fprintf(stderr, " -c (color changes)\n");
fprintf(stderr, " -f (filter on CAN-ID only)\n");
fprintf(stderr, " -t <time> (timeout for ID display [x10ms] default: %d, 0 = OFF)\n", TIMEOUT);
fprintf(stderr, " -h <time> (hold marker on changes [x10ms] default: %d)\n", HOLD);
fprintf(stderr, " -l <time> (loop time (display) [x10ms] default: %d)\n", LOOP);
fprintf(stderr, "Use interface name '%s' to receive from all can-interfaces\n", ANYDEV);
fprintf(stderr, "\n");
fprintf(stderr, "%s", manual);
}
void sigterm(int signo)
{
running = 0;
}
int main(int argc, char **argv)
{
fd_set rdfs;
int s;
canid_t mask = 0;
canid_t value = 0;
long currcms = 0;
long lastcms = 0;
unsigned char quiet = 0;
int opt, ret;
struct timeval timeo, start_tv, tv;
struct sockaddr_can addr;
struct ifreq ifr;
int i;
signal(SIGTERM, sigterm);
signal(SIGHUP, sigterm);
signal(SIGINT, sigterm);
for (i=0; i < 2048 ;i++) /* default: check all CAN-IDs */
do_set(i, ENABLE);
while ((opt = getopt(argc, argv, "m:v:r:t:h:l:qbBcf?")) != -1) {
switch (opt) {
case 'm':
sscanf(optarg, "%x", &mask);
break;
case 'v':
sscanf(optarg, "%x", &value);
break;
case 'r':
readsettings(optarg, 0); /* no BCM-setting here */
break;
case 't':
sscanf(optarg, "%ld", &timeout);
break;
case 'h':
sscanf(optarg, "%ld", &hold);
break;
case 'l':
sscanf(optarg, "%ld", &loop);
break;
case 'q':
quiet = 1;
break;
case 'b':
binary = 1;
binary_gap = 0;
break;
case 'B':
binary = 1;
binary_gap = 1;
break;
case 'c':
color = 1;
break;
case 'f':
filter_id_only = 1;
break;
case '?':
break;
default:
fprintf(stderr, "Unknown option %c\n", opt);
break;
}
}
if (optind == argc) {
print_usage(basename(argv[0]));
exit(0);
}
if (mask || value) {
for (i=0; i < 2048 ;i++) {
if ((i & mask) == (value & mask))
do_set(i, ENABLE);
else
do_clr(i, ENABLE);
}
}
if (quiet)
for (i=0; i < 2048 ;i++)
do_clr(i, ENABLE);
if (strlen(argv[optind]) >= IFNAMSIZ) {
printf("name of CAN device '%s' is too long!\n", argv[optind]);
return 1;
}
interface = argv[optind];
if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_BCM)) < 0) {
perror("socket");
return 1;
}
addr.can_family = AF_CAN;
if (strcmp(ANYDEV, argv[optind])) {
strcpy(ifr.ifr_name, argv[optind]);
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
perror("SIOCGIFINDEX");
exit(1);
}
addr.can_ifindex = ifr.ifr_ifindex;
}
else
addr.can_ifindex = 0; /* any can interface */
if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("connect");
return 1;
}
for (i=0; i < 2048 ;i++) /* initial BCM setup */
if (is_set(i, ENABLE))
rx_setup(s, i);
gettimeofday(&start_tv, NULL);
tv.tv_sec = tv.tv_usec = 0;
printf("%s", CSR_HIDE); /* hide cursor */
while (running) {
FD_ZERO(&rdfs);
FD_SET(0, &rdfs);
FD_SET(s, &rdfs);
timeo.tv_sec = 0;
timeo.tv_usec = 10000 * loop;
if ((ret = select(s+1, &rdfs, NULL, NULL, &timeo)) < 0) {
//perror("select");
running = 0;
continue;
}
gettimeofday(&tv, NULL);
currcms = (tv.tv_sec - start_tv.tv_sec) * 100 + (tv.tv_usec / 10000);
if (FD_ISSET(0, &rdfs))
running &= handle_keyb(s);
if (FD_ISSET(s, &rdfs))
running &= handle_bcm(s, currcms);
if (currcms - lastcms >= loop) {
running &= handle_timeo(s, currcms);
lastcms = currcms;
}
}
printf("%s", CSR_SHOW); /* show cursor */
close(s);
return 0;
}
void rx_setup (int fd, int id){
struct {
struct bcm_msg_head msg_head;
struct can_frame frame;
} txmsg;
txmsg.msg_head.opcode = RX_SETUP;
txmsg.msg_head.can_id = id;
txmsg.msg_head.flags = RX_CHECK_DLC;
txmsg.msg_head.ival1.tv_sec = 0;
txmsg.msg_head.ival1.tv_usec = 0;
txmsg.msg_head.ival2.tv_sec = 0;
txmsg.msg_head.ival2.tv_usec = 0;
txmsg.msg_head.nframes = 1;
U64_DATA(&txmsg.frame) = (__u64) 0xFFFFFFFFFFFFFFFFULL;
if (filter_id_only)
txmsg.msg_head.flags |= RX_FILTER_ID;
if (write(fd, &txmsg, sizeof(txmsg)) < 0)
perror("write");
};
void rx_delete (int fd, int id){
struct bcm_msg_head msg_head;
msg_head.opcode = RX_DELETE;
msg_head.can_id = id;
msg_head.nframes = 0;
if (write(fd, &msg_head, sizeof(msg_head)) < 0)
perror("write");
}
int handle_keyb(int fd){
char cmd [20] = {0};
int i;
unsigned int mask;
unsigned int value;
if (read(0, cmd, 19) > strlen("+123456\n"))
return 1; /* ignore */
if (strlen(cmd) > 0)
cmd[strlen(cmd)-1] = 0; /* chop off trailing newline */
switch (cmd[0]) {
case '+':
case '-':
sscanf(&cmd[1], "%x", &value);
if (strlen(&cmd[1]) > 3) {
mask = value & 0xFFF;
value >>= 12;
}
else
mask = 0x7FF;
if (cmd[0] == '+') {
for (i=0; i < 2048 ;i++) {
if (((i & mask) == (value & mask)) && (is_clr(i, ENABLE))) {
do_set(i, ENABLE);
rx_setup(fd, i);
}
}
}
else { /* '-' */
for (i=0; i < 2048 ;i++) {
if (((i & mask) == (value & mask)) && (is_set(i, ENABLE))) {
do_clr(i, ENABLE);
rx_delete(fd, i);
}
}
}
break;
case 'w' :
writesettings(&cmd[1]);
break;
case 'r' :
readsettings(&cmd[1], fd);
break;
case 'q' :
running = 0;
break;
case 'B' :
binary_gap = 1;
if (binary)
binary = 0;
else
binary = 1;
break;
case 'b' :
binary_gap = 0;
if (binary)
binary = 0;
else
binary = 1;
break;
case 'c' :
if (color)
color = 0;
else
color = 1;
break;
case '#' :
notch = 1;
break;
case '*' :
for (i=0; i < 2048; i++)
U64_DATA(&sniftab[i].notch) = (__u64) 0;
break;
default:
break;
}
clearscreen = 1;
return 1; /* ok */
};
int handle_bcm(int fd, long currcms){
int nbytes, id;
struct {
struct bcm_msg_head msg_head;
struct can_frame frame;
} bmsg;
if ((nbytes = read(fd, &bmsg, sizeof(bmsg))) < 0) {
perror("bcm read");
return 0; /* quit */
}
id = bmsg.msg_head.can_id;
ioctl(fd, SIOCGSTAMP, &sniftab[id].currstamp);
if (bmsg.msg_head.opcode != RX_CHANGED) {
printf("received strange BCM opcode %d!\n", bmsg.msg_head.opcode);
return 0; /* quit */
}
if (nbytes != sizeof(bmsg)) {
printf("received strange BCM data length %d!\n", nbytes);
return 0; /* quit */
}
sniftab[id].current = bmsg.frame;
U64_DATA(&sniftab[id].marker) |=
U64_DATA(&sniftab[id].current) ^ U64_DATA(&sniftab[id].last);
sniftab[id].timeout = (timeout)?(currcms + timeout):0;
if (is_clr(id, DISPLAY))
clearscreen = 1; /* new entry -> new drawing */
do_set(id, DISPLAY);
do_set(id, UPDATE);
return 1; /* ok */
};
int handle_timeo(int fd, long currcms){
int i;
int force_redraw = 0;
static unsigned int frame_count;
if (clearscreen) {
char startline[80];
printf("%s%s", CLR_SCREEN, CSR_HOME);
snprintf(startline, 79, "< cansniffer %s # l=%ld h=%ld t=%ld >", interface, loop, hold, timeout);
printf("%s%*s",STARTLINESTR, 79-(int)strlen(STARTLINESTR), startline);
force_redraw = 1;
clearscreen = 0;
}
if (notch) {
for (i=0; i < 2048; i++)
U64_DATA(&sniftab[i].notch) |= U64_DATA(&sniftab[i].marker);
notch = 0;
}
printf("%s", CSR_HOME);
printf("%02d\n", frame_count++); /* rolling display update counter */
frame_count %= 100;
for (i=0; i < 2048; i++) {
if is_set(i, ENABLE) {
if is_set(i, DISPLAY) {
if (is_set(i, UPDATE) || (force_redraw)){
print_snifline(i);
sniftab[i].hold = currcms + hold;
do_clr(i, UPDATE);
}
else
if ((sniftab[i].hold) && (sniftab[i].hold < currcms)) {
U64_DATA(&sniftab[i].marker) = (__u64) 0;
print_snifline(i);
sniftab[i].hold = 0; /* disable update by hold */
}
else
printf("%s", CSR_DOWN); /* skip my line */
if (sniftab[i].timeout && sniftab[i].timeout < currcms) {
do_clr(i, DISPLAY);
do_clr(i, UPDATE);
clearscreen = 1; /* removed entry -> new drawing next time */
}
}
sniftab[i].last = sniftab[i].current;
sniftab[i].laststamp = sniftab[i].currstamp;
}
}
return 1; /* ok */
};
void print_snifline(int id){
long diffsec = sniftab[id].currstamp.tv_sec - sniftab[id].laststamp.tv_sec;
long diffusec = sniftab[id].currstamp.tv_usec - sniftab[id].laststamp.tv_usec;
int dlc_diff = sniftab[id].last.can_dlc - sniftab[id].current.can_dlc;
int i,j;
if (diffusec < 0)
diffsec--, diffusec += 1000000;
if (diffsec < 0)
diffsec = diffusec = 0;
if (diffsec > 10)
diffsec = 9, diffusec = 999999;
printf("%ld.%06ld %3X ", diffsec, diffusec, id);
if (binary) {
for (i=0; i<sniftab[id].current.can_dlc; i++) {
for (j=7; j>=0; j--) {
if ((color) && (sniftab[id].marker.data[i] & 1<<j) &&
(!(sniftab[id].notch.data[i] & 1<<j)))
if (sniftab[id].current.data[i] & 1<<j)
printf("%s1%s", ATTCOLOR, ATTRESET);
else
printf("%s0%s", ATTCOLOR, ATTRESET);
else
if (sniftab[id].current.data[i] & 1<<j)
putchar('1');
else
putchar('0');
}
if (binary_gap)
putchar(' ');
}
/*
* when the can_dlc decreased (dlc_diff > 0),
* we need to blank the former data printout
*/
for (i=0; i<dlc_diff; i++) {
printf(" ");
if (binary_gap)
putchar(' ');
}
}
else {
for (i=0; i<sniftab[id].current.can_dlc; i++)
if ((color) && (sniftab[id].marker.data[i]) && (!(sniftab[id].notch.data[i])))
printf("%s%02X%s ", ATTCOLOR, sniftab[id].current.data[i], ATTRESET);
else
printf("%02X ", sniftab[id].current.data[i]);
if (sniftab[id].current.can_dlc < 8)
printf("%*s", (8 - sniftab[id].current.can_dlc) * 3, "");
for (i=0; i<sniftab[id].current.can_dlc; i++)
if ((sniftab[id].current.data[i] > 0x1F) &&
(sniftab[id].current.data[i] < 0x7F))
if ((color) && (sniftab[id].marker.data[i]) && (!(sniftab[id].notch.data[i])))
printf("%s%c%s", ATTCOLOR, sniftab[id].current.data[i], ATTRESET);
else
putchar(sniftab[id].current.data[i]);
else
putchar('.');
/*
* when the can_dlc decreased (dlc_diff > 0),
* we need to blank the former data printout
*/
for (i=0; i<dlc_diff; i++)
putchar(' ');
}
putchar('\n');
U64_DATA(&sniftab[id].marker) = (__u64) 0;
};
void writesettings(char* name){
int fd;
char fname[30] = SETFNAME;
int i,j;
char buf[8]= {0};
strncat(fname, name, 29 - strlen(fname));
fd = open(fname, O_WRONLY|O_CREAT, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
if (fd > 0) {
for (i=0; i < 2048 ;i++) {
sprintf(buf, "<%03X>%c.", i, (is_set(i, ENABLE))?'1':'0');
write(fd, buf, 7);
for (j=0; j<8 ; j++){
sprintf(buf, "%02X", sniftab[i].notch.data[j]);
write(fd, buf, 2);
}
write(fd, "\n", 1);
/* 7 + 16 + 1 = 24 bytes per entry */
}
close(fd);
}
else
printf("unable to write setting file '%s'!\n", fname);
};
void readsettings(char* name, int sockfd){
int fd;
char fname[30] = SETFNAME;
char buf[25] = {0};
int i,j;
strncat(fname, name, 29 - strlen(fname));
fd = open(fname, O_RDONLY);
if (fd > 0) {
if (!sockfd)
printf("reading setting file '%s' ... ", fname);
for (i=0; i < 2048 ;i++) {
if (read(fd, &buf, 24) == 24) {
if (buf[5] & 1) {
if (is_clr(i, ENABLE)) {
do_set(i, ENABLE);
if (sockfd)
rx_setup(sockfd, i);
}
}
else
if (is_set(i, ENABLE)) {
do_clr(i, ENABLE);
if (sockfd)
rx_delete(sockfd, i);
}
for (j=7; j>=0 ; j--){
sniftab[i].notch.data[j] =
(__u8) strtoul(&buf[2*j+7], (char **)NULL, 16) & 0xFF;
buf[2*j+7] = 0; /* cut off each time */
}
}
else {
if (!sockfd)
printf("was only able to read until index %d from setting file '%s'!\n",
i, fname);
}
}
if (!sockfd)
printf("done\n");
close(fd);
}
else
printf("unable to read setting file '%s'!\n", fname);
};
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