1 /* Copyright (c) 2016 Facebook
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of version 2 of the GNU General Public
5 * License as published by the Free Software Foundation.
7 #include <linux/unistd.h>
18 static void usage(void)
20 printf("Usage: tc_l2_ipip_redirect [...]\n");
21 printf(" -U <file> Update an already pinned BPF array\n");
22 printf(" -i <ifindex> Interface index\n");
23 printf(" -h Display this help\n");
26 int main(int argc, char **argv)
28 const char *pinned_file = NULL;
35 while ((opt = getopt(argc, argv, "F:U:i:")) != -1) {
42 ifindex = atoi(optarg);
50 if (ifindex < 0 || !pinned_file) {
55 array_fd = bpf_obj_get(pinned_file);
57 fprintf(stderr, "bpf_obj_get(%s): %s(%d)\n",
58 pinned_file, strerror(errno), errno);
62 /* bpf_tunnel_key.remote_ipv4 expects host byte orders */
63 ret = bpf_map_update_elem(array_fd, &array_key, &ifindex, 0);
65 perror("bpf_map_update_elem");