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Diffstat (limited to 'net/bpfilter/main.c')
-rw-r--r--net/bpfilter/main.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/net/bpfilter/main.c b/net/bpfilter/main.c
new file mode 100644
index 000000000000..1317f108df8a
--- /dev/null
+++ b/net/bpfilter/main.c
@@ -0,0 +1,63 @@
+// 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;
+}