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