4 * Copyright (c) 2008 Volkswagen Group Electronic Research
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16 * may be used to endorse or promote products derived from this software
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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.
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.
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40 * Send feedback to <linux-can@vger.kernel.org>
51 #include <sys/types.h>
52 #include <sys/socket.h>
53 #include <sys/ioctl.h>
55 #include <linux/can.h>
56 #include <linux/can/isotp.h>
58 #define NO_CAN_ID 0xFFFFFFFFU
59 #define BUFSIZE 5000 /* size > 4095 to check socket API internal checks */
61 void print_usage(char *prg)
63 fprintf(stderr, "\nUsage: %s [options] <CAN interface>\n", prg);
64 fprintf(stderr, "Options: -s <can_id> (source can_id. Use 8 digits for extended IDs)\n");
65 fprintf(stderr, " -d <can_id> (destination can_id. Use 8 digits for extended IDs)\n");
66 fprintf(stderr, " -x <addr> (extended addressing mode.)\n");
67 fprintf(stderr, " -X <addr> (extended addressing mode (rx addr).)\n");
68 fprintf(stderr, " -p <byte> (set and enable padding byte)\n");
69 fprintf(stderr, " -P <mode> (check padding in SF/CF. (l)ength (c)ontent (a)ll)\n");
70 fprintf(stderr, " -b <bs> (blocksize. 0 = off)\n");
71 fprintf(stderr, " -m <val> (STmin in ms/ns. See spec.)\n");
72 fprintf(stderr, " -f <time ns> (force rx stmin value in nanosecs)\n");
73 fprintf(stderr, " -w <num> (max. wait frame transmissions.)\n");
74 fprintf(stderr, " -l (loop: do not exit after pdu receiption.)\n");
75 fprintf(stderr, " -L <mtu>:<tx_dl>:<tx_flags> (link layer options for CAN FD)\n");
76 fprintf(stderr, "\nCAN IDs and addresses are given and expected in hexadecimal values.\n");
77 fprintf(stderr, "The pdu data is written on STDOUT in space separated ASCII hex values.\n");
78 fprintf(stderr, "\n");
81 int main(int argc, char **argv)
84 struct sockaddr_can addr;
86 static struct can_isotp_options opts;
87 static struct can_isotp_fc_options fcopts;
88 static struct can_isotp_ll_options llopts;
90 extern int optind, opterr, optopt;
91 __u32 force_rx_stmin = 0;
94 unsigned char msg[BUFSIZE];
97 addr.can_addr.tp.tx_id = addr.can_addr.tp.rx_id = NO_CAN_ID;
99 while ((opt = getopt(argc, argv, "s:d:x:X:p:P:b:m:w:f:lL:?")) != -1) {
102 addr.can_addr.tp.tx_id = strtoul(optarg, (char **)NULL, 16);
103 if (strlen(optarg) > 7)
104 addr.can_addr.tp.tx_id |= CAN_EFF_FLAG;
108 addr.can_addr.tp.rx_id = strtoul(optarg, (char **)NULL, 16);
109 if (strlen(optarg) > 7)
110 addr.can_addr.tp.rx_id |= CAN_EFF_FLAG;
114 opts.flags |= CAN_ISOTP_EXTEND_ADDR;
115 opts.ext_address = strtoul(optarg, (char **)NULL, 16) & 0xFF;
119 opts.flags |= CAN_ISOTP_RX_EXT_ADDR;
120 opts.rx_ext_address = strtoul(optarg, (char **)NULL, 16) & 0xFF;
124 opts.flags |= CAN_ISOTP_RX_PADDING;
125 opts.rxpad_content = strtoul(optarg, (char **)NULL, 16) & 0xFF;
129 if (optarg[0] == 'l')
130 opts.flags |= CAN_ISOTP_CHK_PAD_LEN;
131 else if (optarg[0] == 'c')
132 opts.flags |= CAN_ISOTP_CHK_PAD_DATA;
133 else if (optarg[0] == 'a')
134 opts.flags |= (CAN_ISOTP_CHK_PAD_LEN | CAN_ISOTP_CHK_PAD_DATA);
136 printf("unknown padding check option '%c'.\n", optarg[0]);
137 print_usage(basename(argv[0]));
143 fcopts.bs = strtoul(optarg, (char **)NULL, 16) & 0xFF;
147 fcopts.stmin = strtoul(optarg, (char **)NULL, 16) & 0xFF;
151 fcopts.wftmax = strtoul(optarg, (char **)NULL, 16) & 0xFF;
155 opts.flags |= CAN_ISOTP_FORCE_RXSTMIN;
156 force_rx_stmin = strtoul(optarg, (char **)NULL, 10);
164 if (sscanf(optarg, "%hhu:%hhu:%hhu",
167 &llopts.tx_flags) != 3) {
168 printf("unknown link layer options '%s'.\n", optarg);
169 print_usage(basename(argv[0]));
175 print_usage(basename(argv[0]));
180 fprintf(stderr, "Unknown option %c\n", opt);
181 print_usage(basename(argv[0]));
187 if ((argc - optind != 1) ||
188 (addr.can_addr.tp.tx_id == NO_CAN_ID) ||
189 (addr.can_addr.tp.rx_id == NO_CAN_ID)) {
190 print_usage(basename(argv[0]));
194 if ((opts.flags & CAN_ISOTP_RX_EXT_ADDR) && (!(opts.flags & CAN_ISOTP_EXTEND_ADDR))) {
195 print_usage(basename(argv[0]));
199 if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_ISOTP)) < 0) {
204 setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_OPTS, &opts, sizeof(opts));
205 setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_RECV_FC, &fcopts, sizeof(fcopts));
208 if (setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_LL_OPTS, &llopts, sizeof(llopts)) < 0) {
209 perror("link layer sockopt");
214 if (opts.flags & CAN_ISOTP_FORCE_RXSTMIN)
215 setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_RX_STMIN, &force_rx_stmin, sizeof(force_rx_stmin));
217 addr.can_family = AF_CAN;
218 strcpy(ifr.ifr_name, argv[optind]);
219 ioctl(s, SIOCGIFINDEX, &ifr);
220 addr.can_ifindex = ifr.ifr_ifindex;
222 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
229 nbytes = read(s, msg, BUFSIZE);
230 if (nbytes > 0 && nbytes < BUFSIZE)
231 for (i=0; i < nbytes; i++)
232 printf("%02X ", msg[i]);