32 static int do_attach(int idx, int prog_fd, int map_fd, const char *name)  in do_attach()  argument
36 	err = bpf_set_link_xdp_fd(idx, prog_fd, xdp_flags);  in do_attach()
43 	err = bpf_map_update_elem(map_fd, &idx, &idx, 0);  in do_attach()
50 static int do_detach(int idx, const char *name)  in do_detach()  argument
54 	err = bpf_set_link_xdp_fd(idx, -1, xdp_flags);  in do_detach()
86 	int opt, i, idx, err;  in main()  local
152 		idx = if_nametoindex(argv[i]);  in main()
153 		if (!idx)  in main()
154 			idx = strtoul(argv[i], NULL, 0);  in main()
156 		if (!idx) {  in main()
161 			err = do_detach(idx, argv[i]);  in main()
165 			err = do_attach(idx, prog_fd, map_fd, argv[i]);  in main()