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 if (sk->sk_state == TCP_LISTEN) 30 r->idiag_rqueue = sk->sk_ack_backlog; 31 else 32 r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq; 33 r->idiag_wqueue = tp->write_seq - tp->snd_una; 34 if (info != NULL) 35 tcp_get_info(sk, info); 36 } 37 38 static struct inet_diag_handler tcp_diag_handler = { 39 .idiag_hashinfo = &tcp_hashinfo, 40 .idiag_get_info = tcp_diag_get_info, 41 .idiag_type = TCPDIAG_GETSOCK, 42 .idiag_info_size = sizeof(struct tcp_info), 43 }; 44 45 static int __init tcp_diag_init(void) 46 { 47 return inet_diag_register(&tcp_diag_handler); 48 } 49 50 static void __exit tcp_diag_exit(void) 51 { 52 inet_diag_unregister(&tcp_diag_handler); 53 } 54 55 module_init(tcp_diag_init); 56 module_exit(tcp_diag_exit); 57 MODULE_LICENSE("GPL"); 58