| 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 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 | |
| 58 | static int __init dccp_diag_init(void) |
| 59 | { |
| 60 | return inet_diag_register(&dccp_diag_handler); |
| 61 | } |
| 62 | |
| 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); |