blob: 291a925462463df20df39534041c71c421aa6db1 [file] [log] [blame]
Alexei Starovoitovd2ba09c2018-05-21 19:22:30 -07001// SPDX-License-Identifier: GPL-2.0
2#define _GNU_SOURCE
3#include <sys/uio.h>
4#include <errno.h>
5#include <stdio.h>
6#include <sys/socket.h>
7#include <fcntl.h>
8#include <unistd.h>
Masahiro Yamada303a3392019-01-31 12:15:35 +09009#include "../../include/uapi/linux/bpf.h"
Alexei Starovoitovd2ba09c2018-05-21 19:22:30 -070010#include <asm/unistd.h>
11#include "msgfmt.h"
12
Bruno Meneguele13d0f7b2020-03-12 20:08:20 -030013FILE *debug_f;
Alexei Starovoitovd2ba09c2018-05-21 19:22:30 -070014
15static int handle_get_cmd(struct mbox_request *cmd)
16{
17 switch (cmd->cmd) {
18 case 0:
19 return 0;
20 default:
21 break;
22 }
23 return -ENOPROTOOPT;
24}
25
26static int handle_set_cmd(struct mbox_request *cmd)
27{
28 return -ENOPROTOOPT;
29}
30
31static void loop(void)
32{
33 while (1) {
34 struct mbox_request req;
35 struct mbox_reply reply;
36 int n;
37
38 n = read(0, &req, sizeof(req));
39 if (n != sizeof(req)) {
Bruno Meneguele13d0f7b2020-03-12 20:08:20 -030040 fprintf(debug_f, "invalid request %d\n", n);
Alexei Starovoitovd2ba09c2018-05-21 19:22:30 -070041 return;
42 }
43
44 reply.status = req.is_set ?
45 handle_set_cmd(&req) :
46 handle_get_cmd(&req);
47
48 n = write(1, &reply, sizeof(reply));
49 if (n != sizeof(reply)) {
Bruno Meneguele13d0f7b2020-03-12 20:08:20 -030050 fprintf(debug_f, "reply failed %d\n", n);
Alexei Starovoitovd2ba09c2018-05-21 19:22:30 -070051 return;
52 }
53 }
54}
55
56int main(void)
57{
Bruno Meneguele13d0f7b2020-03-12 20:08:20 -030058 debug_f = fopen("/dev/kmsg", "w");
59 setvbuf(debug_f, 0, _IOLBF, 0);
Gary Lina196fa72021-06-23 12:09:18 +080060 fprintf(debug_f, "<5>Started bpfilter\n");
Alexei Starovoitovd2ba09c2018-05-21 19:22:30 -070061 loop();
Bruno Meneguele13d0f7b2020-03-12 20:08:20 -030062 fclose(debug_f);
Alexei Starovoitovd2ba09c2018-05-21 19:22:30 -070063 return 0;
64}