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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 | ||
19 | static 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 | ||
42 | static 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 | ||
51 | static 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 | ||
57 | static 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 | ||
64 | static 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 | .idiag_info_size = sizeof(struct tcp_info), | |
70 | }; | |
71 | ||
72 | static int __init dccp_diag_init(void) | |
73 | { | |
74 | return inet_diag_register(&dccp_diag_handler); | |
75 | } | |
76 | ||
77 | static void __exit dccp_diag_fini(void) | |
78 | { | |
79 | inet_diag_unregister(&dccp_diag_handler); | |
80 | } | |
81 | ||
82 | module_init(dccp_diag_init); | |
83 | module_exit(dccp_diag_fini); | |
84 | ||
85 | MODULE_LICENSE("GPL"); | |
86 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>"); | |
87 | MODULE_DESCRIPTION("DCCP inet_diag handler"); | |
88 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */); |