1 /* 2 * tcp_diag.c Module for monitoring TCP transport protocols sockets. 3 * 4 * Version: $Id: tcp_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $ 5 * 6 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * as published by the Free Software Foundation; either version 11 * 2 of the License, or (at your option) any later version. 12 */ 13 14 #include <linux/config.h> 15 16 #include <linux/module.h> 17 #include <linux/inet_diag.h> 18 19 #include <linux/tcp.h> 20 21 #include <net/tcp.h> 22 23 static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, 24 void *_info) 25 { 26 const struct tcp_sock *tp = tcp_sk(sk); 27 struct tcp_info *info = _info; 28 29 r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq; 30 r->idiag_wqueue = tp->write_seq - tp->snd_una; 31 if (info != NULL) 32 tcp_get_info(sk, info); 33 } 34 35 static struct inet_diag_handler tcp_diag_handler = { 36 .idiag_hashinfo = &tcp_hashinfo, 37 .idiag_get_info = tcp_diag_get_info, 38 .idiag_type = TCPDIAG_GETSOCK, 39 .idiag_info_size = sizeof(struct tcp_info), 40 }; 41 42 static int __init tcp_diag_init(void) 43 { 44 return inet_diag_register(&tcp_diag_handler); 45 } 46 47 static void __exit tcp_diag_exit(void) 48 { 49 inet_diag_unregister(&tcp_diag_handler); 50 } 51 52 module_init(tcp_diag_init); 53 module_exit(tcp_diag_exit); 54 MODULE_LICENSE("GPL"); 55