isotpperf.c

   1 /*
   2  * isotpperf.c - ISO15765-2 protocol performance visualisation
   3  *
   4  * Copyright (c) 2014 Volkswagen Group Electronic Research
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of Volkswagen nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * Alternatively, provided that this notice is retained in full, this
  20  * software may be distributed under the terms of the GNU General
  21  * Public License ("GPL") version 2, in which case the provisions of the
  22  * GPL apply INSTEAD OF those given above.
  23  *
  24  * The provided data structures and external interfaces from this code
  25  * are not restricted to be used by modules with a GPL compatible license.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  32  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  33  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  34  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  35  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  36  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  37  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  38  * DAMAGE.
  39  *
  40  * Send feedback to <linux-can@vger.kernel.org>
  41  *
  42  */
  43
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <stdint.h>
  47 #include <unistd.h>
  48 #include <string.h>
  49 #include <libgen.h>
  50 #include <time.h>
  51
  52 #include <net/if.h>
  53 #include <sys/types.h>
  54 #include <sys/socket.h>
  55 #include <sys/ioctl.h>
  56
  57 #include <linux/can.h>
  58 #include <linux/can/raw.h>
  59
  60 #define NO_CAN_ID 0xFFFFFFFFU
  61 #define PERCENTRES 2 /* resolution in percent for bargraph */
  62 #define NUMBAR (100/PERCENTRES) /* number of bargraph elements */
  63
  64 void print_usage(char *prg)
  65 {
  66         fprintf(stderr, "\nUsage: %s [options] <CAN interface>\n", prg);
  67         fprintf(stderr, "Options: -s <can_id> (source can_id. Use 8 digits for extended IDs)\n");
  68         fprintf(stderr, "         -d <can_id> (destination can_id. Use 8 digits for extended IDs)\n");
  69         fprintf(stderr, "         -x <addr>   (extended addressing mode)\n");
  70         fprintf(stderr, "         -X <addr>   (extended addressing mode (rx addr))\n");
  71         fprintf(stderr, "         -f          (CAN FD mode - only process CAN FD frames)\n");
  72         fprintf(stderr, "\nCAN IDs and addresses are given and expected in hexadecimal values.\n");
  73         fprintf(stderr, "\n");
  74 }
  75
  76 /* substitute math.h function log10(value)+1 */
  77 unsigned int getdigits(unsigned int value)
  78 {
  79         int  digits = 1;
  80
  81         while (value > 9) {
  82                 digits++;
  83                 value /= 10;
  84         }
  85         return digits;
  86 }
  87
  88 int main(int argc, char **argv)
  89 {
  90         fd_set rdfs;
  91         int s;
  92         int running = 1;
  93         struct sockaddr_can addr;
  94         struct can_filter rfilter[2];
  95         struct canfd_frame frame;
  96         int canfd_on = 1;
  97         int nbytes, i, ret;
  98         canid_t src = NO_CAN_ID;
  99         canid_t dst = NO_CAN_ID;
 100         int ext = 0;
 101         int extaddr = 0;
 102         int rx_ext = 0;
 103         int rx_extaddr = 0;
 104         int datidx = 0;
 105         unsigned char bs = 0;
 106         unsigned char stmin = 0;
 107         unsigned long fflen = 0;
 108         unsigned fflen_digits = 0;
 109         unsigned long rcvlen = 0;
 110         unsigned long percent = 0;
 111         struct timeval start_tv, end_tv, diff_tv, timeo;
 112         unsigned int n_pci;
 113         unsigned int sn, last_sn = 0;
 114         int opt;
 115
 116         while ((opt = getopt(argc, argv, "s:d:x:X:?")) != -1) {
 117                 switch (opt) {
 118                 case 's':
 119                         src = strtoul(optarg, (char **)NULL, 16);
 120                         if (strlen(optarg) > 7)
 121                                 src |= CAN_EFF_FLAG;
 122                         break;
 123
 124                 case 'd':
 125                         dst = strtoul(optarg, (char **)NULL, 16);
 126                         if (strlen(optarg) > 7)
 127                                 dst |= CAN_EFF_FLAG;
 128                         break;
 129
 130                 case 'x':
 131                         ext = 1;
 132                         extaddr = strtoul(optarg, (char **)NULL, 16) & 0xFF;
 133                         break;
 134
 135                 case 'X':
 136                         rx_ext = 1;
 137                         rx_extaddr = strtoul(optarg, (char **)NULL, 16) & 0xFF;
 138                         break;
 139
 140                 case '?':
 141                         print_usage(basename(argv[0]));
 142                         exit(0);
 143                         break;
 144
 145                 default:
 146                         fprintf(stderr, "Unknown option %c\n", opt);
 147                         print_usage(basename(argv[0]));
 148                         exit(1);
 149                         break;
 150                 }
 151         }
 152
 153         if ((argc - optind) != 1 || src == NO_CAN_ID || dst == NO_CAN_ID) {
 154                 print_usage(basename(argv[0]));
 155                 exit(0);
 156         }
 157
 158         if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0) {
 159                 perror("socket");
 160                 return 1;
 161         }
 162
 163         /* try to switch the socket into CAN FD mode */
 164         setsockopt(s, SOL_CAN_RAW, CAN_RAW_FD_FRAMES, &canfd_on, sizeof(canfd_on));
 165
 166         /* set single CAN ID raw filters for src and dst frames */
 167         if (src & CAN_EFF_FLAG) {
 168                 rfilter[0].can_id   = src & (CAN_EFF_MASK | CAN_EFF_FLAG);
 169                 rfilter[0].can_mask = (CAN_EFF_MASK|CAN_EFF_FLAG|CAN_RTR_FLAG);
 170         } else {
 171                 rfilter[0].can_id   = src & CAN_SFF_MASK;
 172                 rfilter[0].can_mask = (CAN_SFF_MASK|CAN_EFF_FLAG|CAN_RTR_FLAG);
 173         }
 174
 175         if (dst & CAN_EFF_FLAG) {
 176                 rfilter[1].can_id   = dst & (CAN_EFF_MASK | CAN_EFF_FLAG);
 177                 rfilter[1].can_mask = (CAN_EFF_MASK|CAN_EFF_FLAG|CAN_RTR_FLAG);
 178         } else {
 179                 rfilter[1].can_id   = dst & CAN_SFF_MASK;
 180                 rfilter[1].can_mask = (CAN_SFF_MASK|CAN_EFF_FLAG|CAN_RTR_FLAG);
 181         }
 182
 183         setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER, &rfilter, sizeof(rfilter));
 184
 185         addr.can_family = AF_CAN;
 186         addr.can_ifindex = if_nametoindex(argv[optind]);
 187
 188         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 189                 perror("bind");
 190                 return 1;
 191         }
 192
 193         while (running) {
 194
 195                 FD_ZERO(&rdfs);
 196                 FD_SET(s, &rdfs);
 197
 198                 /* timeout for ISO TP transmissions */
 199                 timeo.tv_sec  = 1;
 200                 timeo.tv_usec = 0;
 201
 202                 if ((ret = select(s+1, &rdfs, NULL, NULL, &timeo)) < 0) {
 203                         running = 0;
 204                         continue;
 205                 }
 206
 207                 /* detected timeout of already started transmission */
 208                 if (rcvlen && !(FD_ISSET(s, &rdfs))) {
 209                         printf("\r%-*s",78, " (transmission timed out)");
 210                         fflush(stdout);
 211                         fflen = rcvlen = 0;
 212                         continue;
 213                 }
 214
 215                 nbytes = read(s, &frame, sizeof(frame));
 216                 if (nbytes < 0) {
 217                         perror("read");
 218                         ret = nbytes;
 219                         running = 0;
 220                         continue;
 221                 } else if (nbytes != CAN_MTU && nbytes != CANFD_MTU) {
 222                         fprintf(stderr, "read: incomplete CAN frame %lu %d\n", sizeof(frame), nbytes);
 223                         ret = nbytes;
 224                         running = 0;
 225                         continue;
 226                 } else {
 227                         if (rcvlen) {
 228                                 /* make sure to process only the detected PDU CAN frame type */
 229                                 if (canfd_on && (nbytes != CANFD_MTU))
 230                                         continue;
 231                                 if (!canfd_on && (nbytes != CAN_MTU))
 232                                         continue;
 233                         }
 234
 235                         /* check extended address if provided */
 236                         if (ext && extaddr != frame.data[0])
 237                                 continue;
 238
 239                         /* only get flow control information from dst CAN ID */
 240                         if (frame.can_id == dst) {
 241                                 /* check extended address if provided */
 242                                 if (rx_ext && frame.data[0] != rx_extaddr)
 243                                         continue;
 244
 245                                 n_pci = frame.data[rx_ext];
 246                                 /* check flow control PCI only */
 247                                 if ((n_pci & 0xF0) == 0x30) {
 248                                         bs = frame.data[rx_ext+1];
 249                                         stmin = frame.data[rx_ext+2];
 250                                 } else
 251                                         continue;
 252                         }
 253
 254                         /* data content starts and index datidx */
 255                         datidx = 0;
 256
 257                         n_pci = frame.data[ext];
 258                         switch (n_pci & 0xF0) {
 259
 260                         case 0x00:
 261                                 /* SF */
 262                                 if (n_pci & 0xF) {
 263                                         fflen = rcvlen = n_pci & 0xF;
 264                                         datidx = ext+1;
 265                                 } else {
 266                                         fflen = rcvlen = frame.data[ext + 1];
 267                                         datidx = ext+2;
 268                                 }
 269
 270                                 /* ignore incorrect SF PDUs */
 271                                 if (frame.len < rcvlen + datidx)
 272                                         fflen = rcvlen = 0;
 273
 274                                 /* get number of digits for printing */
 275                                 fflen_digits = getdigits(fflen);
 276
 277                                 ioctl(s, SIOCGSTAMP, &start_tv);
 278
 279                                 /* determine CAN frame mode for this PDU */
 280                                 if (nbytes == CAN_MTU)
 281                                         canfd_on = 0;
 282                                 else
 283                                         canfd_on = 1;
 284
 285                                 break;
 286
 287                         case 0x10:
 288                                 /* FF */
 289                                 fflen = ((n_pci & 0x0F)<<8) + frame.data[ext+1];
 290                                 if (fflen)
 291                                         datidx = ext+2;
 292                                 else {
 293                                         fflen = (frame.data[ext+2]<<24) +
 294                                                 (frame.data[ext+3]<<16) +
 295                                                 (frame.data[ext+4]<<8) +
 296                                                 frame.data[ext+5];
 297                                         datidx = ext+6;
 298                                 }
 299
 300                                 /* to increase the time resolution we multiply fflen with 1000 later */
 301                                 if (fflen >= (UINT32_MAX / 1000)) {
 302                                         printf("fflen %lu is more than ~4.2 MB - ignoring PDU\n", fflen);
 303                                         fflush(stdout);
 304                                         fflen = rcvlen = 0;
 305                                         continue;
 306                                 }
 307                                 rcvlen = frame.len - datidx;
 308                                 last_sn = 0;
 309
 310                                 /* get number of digits for printing */
 311                                 fflen_digits = getdigits(fflen);
 312
 313                                 ioctl(s, SIOCGSTAMP, &start_tv);
 314
 315                                 /* determine CAN frame mode for this PDU */
 316                                 if (nbytes == CAN_MTU)
 317                                         canfd_on = 0;
 318                                 else
 319                                         canfd_on = 1;
 320
 321                                 break;
 322
 323                         case 0x20:
 324                                 /* CF */
 325                                 if (rcvlen) {
 326                                         sn = n_pci & 0x0F;
 327                                         if (sn == ((last_sn + 1) & 0xF)) {
 328                                                 last_sn = sn;
 329                                                 datidx = ext+1;
 330                                                 rcvlen += frame.len - datidx;
 331                                         }
 332                                 }
 333                                 break;
 334
 335                         default:
 336                                 break;
 337                         }
 338
 339                         /* PDU reception in process */
 340                         if (rcvlen) {
 341                                 if (rcvlen > fflen)
 342                                         rcvlen = fflen;
 343
 344                                 percent = (rcvlen * 100 / fflen);
 345                                 printf("\r %3lu%% ", percent);
 346
 347                                 printf("|");
 348
 349                                 if (percent > 100)
 350                                         percent = 100;
 351
 352                                 for (i=0; i < NUMBAR; i++){
 353                                         if (i < percent/PERCENTRES)
 354                                                 printf("X");
 355                                         else
 356                                                 printf(".");
 357                                 }
 358                                 printf("| %*lu/%lu ", fflen_digits, rcvlen, fflen);
 359                         }
 360
 361                         /* PDU complete */
 362                         if (rcvlen && rcvlen >= fflen) {
 363
 364                                 printf("\r%s (BS:%2hhu # ", canfd_on?"CAN-FD":"CAN2.0", bs);
 365                                 if (stmin < 0x80)
 366                                         printf("STmin:%3hhu msec)", stmin);
 367                                 else if (stmin > 0xF0 && stmin < 0xFA)
 368                                         printf("STmin:3%u usec)", (stmin & 0xF) * 100);
 369                                 else
 370                                         printf("STmin: invalid   )");
 371
 372                                 printf(" : %lu byte in ", fflen);
 373
 374                                 /* calculate time */
 375                                 ioctl(s, SIOCGSTAMP, &end_tv);
 376                                 diff_tv.tv_sec  = end_tv.tv_sec  - start_tv.tv_sec;
 377                                 diff_tv.tv_usec = end_tv.tv_usec - start_tv.tv_usec;
 378                                 if (diff_tv.tv_usec < 0)
 379                                         diff_tv.tv_sec--, diff_tv.tv_usec += 1000000;
 380                                 if (diff_tv.tv_sec < 0)
 381                                         diff_tv.tv_sec = diff_tv.tv_usec = 0;
 382
 383                                 /* check devisor to be not zero */
 384                                 if (diff_tv.tv_sec * 1000 + diff_tv.tv_usec / 1000){
 385                                         printf("%ld.%06lds ", diff_tv.tv_sec, diff_tv.tv_usec);
 386                                         printf("=> %lu byte/s", (fflen * 1000) /
 387                                                (diff_tv.tv_sec * 1000 + diff_tv.tv_usec / 1000));
 388                                 } else
 389                                         printf("(no time available)     ");
 390
 391                                 printf("\n");
 392                                 /* wait for next PDU */
 393                                 fflen = rcvlen = 0;
 394                         }
 395                         fflush(stdout);
 396                 }
 397         }
 398
 399         close(s);
 400
 401         return ret;
 402 }