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
dccp_get_info(struct sock * sk,struct tcp_info * info)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
dccp_diag_get_info(struct sock * sk,struct inet_diag_msg * r,void * _info)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 const struct inet_diag_handler dccp_diag_handler = {
52 .idiag_hashinfo = &dccp_hashinfo,
53 .idiag_get_info = dccp_diag_get_info,
54 .idiag_type = DCCPDIAG_GETSOCK,
55 .idiag_info_size = sizeof(struct tcp_info),
56 };
57
dccp_diag_init(void)58 static int __init dccp_diag_init(void)
59 {
60 return inet_diag_register(&dccp_diag_handler);
61 }
62
dccp_diag_fini(void)63 static void __exit dccp_diag_fini(void)
64 {
65 inet_diag_unregister(&dccp_diag_handler);
66 }
67
68 module_init(dccp_diag_init);
69 module_exit(dccp_diag_fini);
70
71 MODULE_LICENSE("GPL");
72 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
73 MODULE_DESCRIPTION("DCCP inet_diag handler");
74 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_INET_DIAG, DCCPDIAG_GETSOCK);
75