1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * net/dccp/diag.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * An implementation of the DCCP protocol
6*4882a593Smuzhiyun * Arnaldo Carvalho de Melo <acme@mandriva.com>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/inet_diag.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include "ccid.h"
14*4882a593Smuzhiyun #include "dccp.h"
15*4882a593Smuzhiyun
dccp_get_info(struct sock * sk,struct tcp_info * info)16*4882a593Smuzhiyun static void dccp_get_info(struct sock *sk, struct tcp_info *info)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun struct dccp_sock *dp = dccp_sk(sk);
19*4882a593Smuzhiyun const struct inet_connection_sock *icsk = inet_csk(sk);
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun memset(info, 0, sizeof(*info));
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun info->tcpi_state = sk->sk_state;
24*4882a593Smuzhiyun info->tcpi_retransmits = icsk->icsk_retransmits;
25*4882a593Smuzhiyun info->tcpi_probes = icsk->icsk_probes_out;
26*4882a593Smuzhiyun info->tcpi_backoff = icsk->icsk_backoff;
27*4882a593Smuzhiyun info->tcpi_pmtu = icsk->icsk_pmtu_cookie;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun if (dp->dccps_hc_rx_ackvec != NULL)
30*4882a593Smuzhiyun info->tcpi_options |= TCPI_OPT_SACK;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun if (dp->dccps_hc_rx_ccid != NULL)
33*4882a593Smuzhiyun ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun if (dp->dccps_hc_tx_ccid != NULL)
36*4882a593Smuzhiyun ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
dccp_diag_get_info(struct sock * sk,struct inet_diag_msg * r,void * _info)39*4882a593Smuzhiyun static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
40*4882a593Smuzhiyun void *_info)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun r->idiag_rqueue = r->idiag_wqueue = 0;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (_info != NULL)
45*4882a593Smuzhiyun dccp_get_info(sk, _info);
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
dccp_diag_dump(struct sk_buff * skb,struct netlink_callback * cb,const struct inet_diag_req_v2 * r)48*4882a593Smuzhiyun static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
49*4882a593Smuzhiyun const struct inet_diag_req_v2 *r)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r);
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
dccp_diag_dump_one(struct netlink_callback * cb,const struct inet_diag_req_v2 * req)54*4882a593Smuzhiyun static int dccp_diag_dump_one(struct netlink_callback *cb,
55*4882a593Smuzhiyun const struct inet_diag_req_v2 *req)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun return inet_diag_dump_one_icsk(&dccp_hashinfo, cb, req);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun static const struct inet_diag_handler dccp_diag_handler = {
61*4882a593Smuzhiyun .dump = dccp_diag_dump,
62*4882a593Smuzhiyun .dump_one = dccp_diag_dump_one,
63*4882a593Smuzhiyun .idiag_get_info = dccp_diag_get_info,
64*4882a593Smuzhiyun .idiag_type = IPPROTO_DCCP,
65*4882a593Smuzhiyun .idiag_info_size = sizeof(struct tcp_info),
66*4882a593Smuzhiyun };
67*4882a593Smuzhiyun
dccp_diag_init(void)68*4882a593Smuzhiyun static int __init dccp_diag_init(void)
69*4882a593Smuzhiyun {
70*4882a593Smuzhiyun return inet_diag_register(&dccp_diag_handler);
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
dccp_diag_fini(void)73*4882a593Smuzhiyun static void __exit dccp_diag_fini(void)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun inet_diag_unregister(&dccp_diag_handler);
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun module_init(dccp_diag_init);
79*4882a593Smuzhiyun module_exit(dccp_diag_fini);
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun MODULE_LICENSE("GPL");
82*4882a593Smuzhiyun MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
83*4882a593Smuzhiyun MODULE_DESCRIPTION("DCCP inet_diag handler");
84*4882a593Smuzhiyun MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */);
85