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