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
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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. Use 'any' for all addresses)\n");
67 fprintf(stderr, " -p <byte> (set and enable padding byte)\n");
68 fprintf(stderr, " -P <mode> (check padding in FC. (l)ength (c)ontent (a)ll)\n");
69 fprintf(stderr, " -t <time ns> (frame transmit time (N_As) in nanosecs)\n");
70 fprintf(stderr, " -f <time ns> (ignore FC and force local tx stmin value in nanosecs)\n");
71 fprintf(stderr, "\nCAN IDs and addresses are given and expected in hexadecimal values.\n");
72 fprintf(stderr, "The pdu data is expected on STDIN in space separated ASCII hex values.\n");
73 fprintf(stderr, "\n");
76 int main(int argc, char **argv)
79 struct sockaddr_can addr;
81 static struct can_isotp_options opts;
83 extern int optind, opterr, optopt;
84 __u32 force_tx_stmin = 0;
85 unsigned char buf[BUFSIZE];
89 addr.can_addr.tp.tx_id = addr.can_addr.tp.rx_id = NO_CAN_ID;
91 while ((opt = getopt(argc, argv, "s:d:x:p:P:t:f:?")) != -1) {
94 addr.can_addr.tp.tx_id = strtoul(optarg, (char **)NULL, 16);
95 if (strlen(optarg) > 7)
96 addr.can_addr.tp.tx_id |= CAN_EFF_FLAG;
100 addr.can_addr.tp.rx_id = strtoul(optarg, (char **)NULL, 16);
101 if (strlen(optarg) > 7)
102 addr.can_addr.tp.rx_id |= CAN_EFF_FLAG;
106 opts.flags |= CAN_ISOTP_EXTEND_ADDR;
107 opts.ext_address = strtoul(optarg, (char **)NULL, 16) & 0xFF;
111 opts.flags |= CAN_ISOTP_TX_PADDING;
112 opts.txpad_content = strtoul(optarg, (char **)NULL, 16) & 0xFF;
116 if (optarg[0] == 'l')
117 opts.flags |= CAN_ISOTP_CHK_PAD_LEN;
118 else if (optarg[0] == 'c')
119 opts.flags |= CAN_ISOTP_CHK_PAD_DATA;
120 else if (optarg[0] == 'a')
121 opts.flags |= (CAN_ISOTP_CHK_PAD_LEN | CAN_ISOTP_CHK_PAD_DATA);
123 printf("unknown padding check option '%c'.\n", optarg[0]);
124 print_usage(basename(argv[0]));
130 opts.frame_txtime = strtoul(optarg, (char **)NULL, 10);
134 opts.flags |= CAN_ISOTP_FORCE_TXSTMIN;
135 force_tx_stmin = strtoul(optarg, (char **)NULL, 10);
139 print_usage(basename(argv[0]));
144 fprintf(stderr, "Unknown option %c\n", opt);
145 print_usage(basename(argv[0]));
151 if ((argc - optind != 1) ||
152 (addr.can_addr.tp.tx_id == NO_CAN_ID) ||
153 (addr.can_addr.tp.rx_id == NO_CAN_ID)) {
154 print_usage(basename(argv[0]));
158 if ((s = socket(PF_CAN, SOCK_DGRAM, CAN_ISOTP)) < 0) {
163 setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_OPTS, &opts, sizeof(opts));
165 if (opts.flags & CAN_ISOTP_FORCE_TXSTMIN)
166 setsockopt(s, SOL_CAN_ISOTP, CAN_ISOTP_TX_STMIN, &force_tx_stmin, sizeof(force_tx_stmin));
168 addr.can_family = AF_CAN;
169 strcpy(ifr.ifr_name, argv[optind]);
170 ioctl(s, SIOCGIFINDEX, &ifr);
171 addr.can_ifindex = ifr.ifr_ifindex;
173 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
179 while (buflen < BUFSIZE && scanf("%hhx", &buf[buflen]) == 1)
182 retval = write(s, buf, buflen);
188 if (retval != buflen)
189 fprintf(stderr, "wrote only %d from %d byte\n", retval, buflen);
192 * due to a Kernel internal wait queue the PDU is sent completely
193 * before close() returns.