71 	close(sk);  in get_ifindex()
235 			close(fd_recv);  in tcp_receive_and_reply()
451 		close(fd4);  in main()
453 		close(fd6);  in main()
455 		close(fd4m);  in main()
457 		close(fd6m);  in main()
459 		close(tcp4);  in main()
461 		close(tcp6);  in main()
619 	close(fd4);  in main()
620 	close(fd6);  in main()
621 	close(fd4m);  in main()
622 	close(fd6m);  in main()
623 	close(tcp4);  in main()
624 	close(tcp6);  in main()