2 * tcp_diag.c Module for monitoring TCP transport protocols sockets.
4 * Version: $Id: tcp_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
6 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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.
15 #include <linux/module.h>
16 #include <linux/inet_diag.h>
18 #include <linux/tcp.h>
22 static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
25 const struct tcp_sock *tp = tcp_sk(sk);
26 struct tcp_info *info = _info;
28 if (sk->sk_state == TCP_LISTEN) {
29 r->idiag_rqueue = sk->sk_ack_backlog;
30 r->idiag_wqueue = sk->sk_max_ack_backlog;
32 r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
33 r->idiag_wqueue = tp->write_seq - tp->snd_una;
36 tcp_get_info(sk, info);
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),
46 static int __init tcp_diag_init(void)
48 return inet_diag_register(&tcp_diag_handler);
51 static void __exit tcp_diag_exit(void)
53 inet_diag_unregister(&tcp_diag_handler);
56 module_init(tcp_diag_init);
57 module_exit(tcp_diag_exit);
58 MODULE_LICENSE("GPL");
59 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_INET_DIAG, TCPDIAG_GETSOCK);