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
|
#if 0
exec cc -Wall -Wextra -Wpedantic $@ -o $(dirname $0)/wake $0
#endif
#include <err.h>
#include <netinet/in.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sysexits.h>
#define MAC 0x04, 0x7D, 0x7B, 0xD5, 0x6A, 0x53
const uint8_t payload[] = {
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
MAC, MAC, MAC, MAC, MAC, MAC, MAC, MAC,
MAC, MAC, MAC, MAC, MAC, MAC, MAC, MAC,
};
int main() {
int sock = socket(PF_INET, SOCK_DGRAM, 0);
if (sock < 0) err(EX_OSERR, "socket");
int on = 1;
int error = setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on));
if (error) err(EX_OSERR, "setsockopt");
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_port = 9,
.sin_addr.s_addr = INADDR_BROADCAST,
};
ssize_t len = sendto(
sock, payload, sizeof(payload), 0,
(struct sockaddr *)&addr, sizeof(addr)
);
if (len < 0) err(EX_IOERR, "sendto");
return EX_OK;
}
|