65 lines
1.1 KiB
C
65 lines
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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FILE *debug_f;
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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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fprintf(debug_f, "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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fprintf(debug_f, "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_f = fopen("/dev/kmsg", "w");
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setvbuf(debug_f, 0, _IOLBF, 0);
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fprintf(debug_f, "Started bpfilter\n");
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loop();
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fclose(debug_f);
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return 0;
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}
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