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Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -03001/*
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
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030012
13#include <linux/module.h>
Arnaldo Carvalho de Meloa8c21902005-08-12 12:56:38 -030014#include <linux/inet_diag.h>
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030015
Arnaldo Carvalho de Melo2babe1f2005-08-23 21:52:35 -070016#include "ccid.h"
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030017#include "dccp.h"
18
Arnaldo Carvalho de Melo2babe1f2005-08-23 21:52:35 -070019static 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;
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -080030 info->tcpi_pmtu = icsk->icsk_pmtu_cookie;
Arnaldo Carvalho de Melo2babe1f2005-08-23 21:52:35 -070031
Gerrit Renker6fdd34d2008-12-08 01:19:06 -080032 if (dp->dccps_hc_rx_ackvec != NULL)
Arnaldo Carvalho de Melo2babe1f2005-08-23 21:52:35 -070033 info->tcpi_options |= TCPI_OPT_SACK;
34
Arnaldo Carvalho de Meloa6937222008-12-17 16:08:01 -080035 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);
Arnaldo Carvalho de Melo2babe1f2005-08-23 21:52:35 -070040}
41
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030042static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030043 void *_info)
44{
Arnaldo Carvalho de Melo73c1f4a2005-08-12 12:51:49 -030045 r->idiag_rqueue = r->idiag_wqueue = 0;
Arnaldo Carvalho de Melo2babe1f2005-08-23 21:52:35 -070046
47 if (_info != NULL)
48 dccp_get_info(sk, _info);
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030049}
50
Pavel Emelyanov1942c512011-12-09 06:23:18 +000051static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
Eric Dumazet34160ea2015-03-10 07:15:54 -070052 const struct inet_diag_req_v2 *r, struct nlattr *bc)
Pavel Emelyanov1942c512011-12-09 06:23:18 +000053{
54 inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r, bc);
55}
56
Eric Dumazet34160ea2015-03-10 07:15:54 -070057static int dccp_diag_dump_one(struct sk_buff *in_skb,
58 const struct nlmsghdr *nlh,
59 const struct inet_diag_req_v2 *req)
Pavel Emelyanov1942c512011-12-09 06:23:18 +000060{
61 return inet_diag_dump_one_icsk(&dccp_hashinfo, in_skb, nlh, req);
62}
63
Eric Dumazeta7a0d6a2008-11-19 15:43:27 -080064static const struct inet_diag_handler dccp_diag_handler = {
Pavel Emelyanov1942c512011-12-09 06:23:18 +000065 .dump = dccp_diag_dump,
66 .dump_one = dccp_diag_dump_one,
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030067 .idiag_get_info = dccp_diag_get_info,
Pavel Emelyanovf13c95f2011-12-06 08:05:24 +000068 .idiag_type = IPPROTO_DCCP,
Arnaldo Carvalho de Melo4f5736c2005-08-12 09:27:49 -030069};
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");
Pavel Emelyanovaec8dc62011-12-15 02:43:27 +000087MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */);