xref: /openbmc/linux/net/dccp/diag.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 /*
2  *  net/dccp/diag.c
3  *
4  *  An implementation of the DCCP protocol
5  *  Arnaldo Carvalho de Melo <acme@mandriva.com>
6  *
7  *	This program is free software; you can redistribute it and/or modify it
8  *	under the terms of the GNU General Public License version 2 as
9  *	published by the Free Software Foundation.
10  */
11 
12 #include <linux/config.h>
13 
14 #include <linux/module.h>
15 #include <linux/inet_diag.h>
16 
17 #include "ccid.h"
18 #include "dccp.h"
19 
20 static void dccp_get_info(struct sock *sk, struct tcp_info *info)
21 {
22 	struct dccp_sock *dp = dccp_sk(sk);
23 	const struct inet_connection_sock *icsk = inet_csk(sk);
24 
25 	memset(info, 0, sizeof(*info));
26 
27 	info->tcpi_state	= sk->sk_state;
28 	info->tcpi_retransmits	= icsk->icsk_retransmits;
29 	info->tcpi_probes	= icsk->icsk_probes_out;
30 	info->tcpi_backoff	= icsk->icsk_backoff;
31 	info->tcpi_pmtu		= dp->dccps_pmtu_cookie;
32 
33 	if (dp->dccps_options.dccpo_send_ack_vector)
34 		info->tcpi_options |= TCPI_OPT_SACK;
35 
36 	ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
37 	ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
38 }
39 
40 static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
41 			       void *_info)
42 {
43 	r->idiag_rqueue = r->idiag_wqueue = 0;
44 
45 	if (_info != NULL)
46 		dccp_get_info(sk, _info);
47 }
48 
49 static struct inet_diag_handler dccp_diag_handler = {
50 	.idiag_hashinfo	 = &dccp_hashinfo,
51 	.idiag_get_info	 = dccp_diag_get_info,
52 	.idiag_type	 = DCCPDIAG_GETSOCK,
53 	.idiag_info_size = sizeof(struct tcp_info),
54 };
55 
56 static int __init dccp_diag_init(void)
57 {
58 	return inet_diag_register(&dccp_diag_handler);
59 }
60 
61 static void __exit dccp_diag_fini(void)
62 {
63 	inet_diag_unregister(&dccp_diag_handler);
64 }
65 
66 module_init(dccp_diag_init);
67 module_exit(dccp_diag_fini);
68 
69 MODULE_LICENSE("GPL");
70 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
71 MODULE_DESCRIPTION("DCCP inet_diag handler");
72