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 15 #include <linux/module.h> 16 #include <linux/inet_diag.h> 17 18 #include <linux/tcp.h> 19 20 #include <net/tcp.h> 21 22 static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, 23 void *_info) 24 { 25 const struct tcp_sock *tp = tcp_sk(sk); 26 struct tcp_info *info = _info; 27 28 if (sk->sk_state == TCP_LISTEN) { 29 r->idiag_rqueue = sk->sk_ack_backlog; 30 r->idiag_wqueue = sk->sk_max_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 } 35 if (info != NULL) 36 tcp_get_info(sk, info); 37 } 38 39 static struct inet_diag_handler tcp_diag_handler = { 40 .idiag_hashinfo = &tcp_hashinfo, 41 .idiag_get_info = tcp_diag_get_info, 42 .idiag_type = TCPDIAG_GETSOCK, 43 .idiag_info_size = sizeof(struct tcp_info), 44 }; 45 46 static int __init tcp_diag_init(void) 47 { 48 return inet_diag_register(&tcp_diag_handler); 49 } 50 51 static void __exit tcp_diag_exit(void) 52 { 53 inet_diag_unregister(&tcp_diag_handler); 54 } 55 56 module_init(tcp_diag_init); 57 module_exit(tcp_diag_exit); 58 MODULE_LICENSE("GPL"); 59