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// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sys/uio.h>
#include <errno.h>
#include <stdio.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <unistd.h>
#include "include/uapi/linux/bpf.h"
#include <asm/unistd.h>
#include "msgfmt.h"
int debug_fd;
static int handle_get_cmd(struct mbox_request *cmd)
{
switch (cmd->cmd) {
case 0:
return 0;
default:
break;
}
return -ENOPROTOOPT;
}
static int handle_set_cmd(struct mbox_request *cmd)
{
return -ENOPROTOOPT;
}
static void loop(void)
{
while (1) {
struct mbox_request req;
struct mbox_reply reply;
int n;
n = read(0, &req, sizeof(req));
if (n != sizeof(req)) {
dprintf(debug_fd, "invalid request %d\n", n);
return;
}
reply.status = req.is_set ?
handle_set_cmd(&req) :
handle_get_cmd(&req);
n = write(1, &reply, sizeof(reply));
if (n != sizeof(reply)) {
dprintf(debug_fd, "reply failed %d\n", n);
return;
}
}
}
int main(void)
{
debug_fd = open("/dev/console", 00000002);
dprintf(debug_fd, "Started bpfilter\n");
loop();
close(debug_fd);
return 0;
}
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