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
dccp_diag_dump(struct sk_buff * skb,struct netlink_callback * cb,const struct inet_diag_req_v2 * r,struct nlattr * bc)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
dccp_diag_dump_one(struct sk_buff * in_skb,const struct nlmsghdr * nlh,const struct inet_diag_req_v2 * req)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
dccp_diag_init(void)72 static int __init dccp_diag_init(void)
73 {
74 return inet_diag_register(&dccp_diag_handler);
75 }
76
dccp_diag_fini(void)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 */);
89