1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include "can.h"
int main(int argc, char **argv)
{
int s;
int family = PF_CAN, type = SOCK_RAW, proto = CAN_PROTO_RAW;
int opt;
struct sockaddr_can addr;
unsigned char buf[4096];
int nbytes, i;
struct ifreq ifr;
struct iovec bufs[] = {
{ "abc", 4 },
{ "def", 4 },
{ "0123456", 8 },
{ "xyz", 4 },
};
while ((opt = getopt(argc, argv, "f:t:p:")) != -1) {
switch (opt) {
case 'f':
family = atoi(optarg);
break;
case 't':
type = atoi(optarg);
break;
case 'p':
proto = atoi(optarg);
break;
default:
fprintf(stderr, "Unknown option %c\n", opt);
break;
}
}
printf("family = %d, type = %d, proto = %d\n", family, type, proto);
if ((s = socket(family, type, proto)) < 0) {
perror("socket");
return 1;
}
strcpy(ifr.ifr_name, "vcan2");
ioctl(s, SIOCGIFINDEX, &ifr);
addr.can_family = family;
addr.can_ifindex = ifr.ifr_ifindex;
if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind");
return 1;
}
#if 0
if (write(s, "abc", 4) < 0) {
perror("write");
return 1;
}
#endif
if (writev(s, bufs, sizeof(bufs)/sizeof(*bufs)) < 0) {
perror("writev");
return 1;
}
if ((nbytes = read(s, buf, 4096)) < 0) {
perror("read");
return 1;
} else {
printf("%d bytes read\n", nbytes);
for (i = 0; i < nbytes; i++) {
printf(" %02x", buf[i]);
if (i % 16 == 15 || i == nbytes - 1)
putchar('\n');
}
}
return 0;
}
|
