tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
22static 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 else
31 r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
32 r->idiag_wqueue = tp->write_seq - tp->snd_una;
33 if (info != NULL)
34 tcp_get_info(sk, info);
35}
36
37static struct inet_diag_handler tcp_diag_handler = {
38 .idiag_hashinfo = &tcp_hashinfo,
39 .idiag_get_info = tcp_diag_get_info,
40 .idiag_type = TCPDIAG_GETSOCK,
41 .idiag_info_size = sizeof(struct tcp_info),
42};
43
44static int __init tcp_diag_init(void)
45{
46 return inet_diag_register(&tcp_diag_handler);
47}
48
49static void __exit tcp_diag_exit(void)
50{
51 inet_diag_unregister(&tcp_diag_handler);
52}
53
54module_init(tcp_diag_init);
55module_exit(tcp_diag_exit);
56MODULE_LICENSE("GPL");