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
13#include <linux/module.h>
14#include <linux/inet_diag.h>
15
16#include "ccid.h"
17#include "dccp.h"
18
19static void dccp_get_info(struct sock *sk, struct tcp_info *info)
20{
21	struct dccp_sock *dp = dccp_sk(sk);
22	const struct inet_connection_sock *icsk = inet_csk(sk);
23
24	memset(info, 0, sizeof(*info));
25
26	info->tcpi_state	= sk->sk_state;
27	info->tcpi_retransmits	= icsk->icsk_retransmits;
28	info->tcpi_probes	= icsk->icsk_probes_out;
29	info->tcpi_backoff	= icsk->icsk_backoff;
30	info->tcpi_pmtu		= icsk->icsk_pmtu_cookie;
31
32	if (dp->dccps_hc_rx_ackvec != NULL)
33		info->tcpi_options |= TCPI_OPT_SACK;
34
35	if (dp->dccps_hc_rx_ccid != NULL)
36		ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
37
38	if (dp->dccps_hc_tx_ccid != NULL)
39		ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
40}
41
42static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
43			       void *_info)
44{
45	r->idiag_rqueue = r->idiag_wqueue = 0;
46
47	if (_info != NULL)
48		dccp_get_info(sk, _info);
49}
50
51static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
52			   const struct inet_diag_req_v2 *r, struct nlattr *bc)
53{
54	inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r, bc);
55}
56
57static int dccp_diag_dump_one(struct sk_buff *in_skb,
58			      const struct nlmsghdr *nlh,
59			      const struct inet_diag_req_v2 *req)
60{
61	return inet_diag_dump_one_icsk(&dccp_hashinfo, in_skb, nlh, req);
62}
63
64static const struct inet_diag_handler dccp_diag_handler = {
65	.dump		 = dccp_diag_dump,
66	.dump_one	 = dccp_diag_dump_one,
67	.idiag_get_info	 = dccp_diag_get_info,
68	.idiag_type	 = IPPROTO_DCCP,
69};
70
71static int __init dccp_diag_init(void)
72{
73	return inet_diag_register(&dccp_diag_handler);
74}
75
76static void __exit dccp_diag_fini(void)
77{
78	inet_diag_unregister(&dccp_diag_handler);
79}
80
81module_init(dccp_diag_init);
82module_exit(dccp_diag_fini);
83
84MODULE_LICENSE("GPL");
85MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
86MODULE_DESCRIPTION("DCCP inet_diag handler");
87MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */);
88