net/dccp/diag.c

   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 #include <linux/config.h>
  13
  14 #include <linux/module.h>
  15 #include <linux/inet_diag.h>
  16
  17 #include "ccid.h"
  18 #include "dccp.h"
  19
  20 static void dccp_get_info(struct sock *sk, struct tcp_info *info)
  21 {
  22         struct dccp_sock *dp = dccp_sk(sk);
  23         const struct inet_connection_sock *icsk = inet_csk(sk);
  24
  25         memset(info, 0, sizeof(*info));
  26
  27         info->tcpi_state        = sk->sk_state;
  28         info->tcpi_retransmits  = icsk->icsk_retransmits;
  29         info->tcpi_probes       = icsk->icsk_probes_out;
  30         info->tcpi_backoff      = icsk->icsk_backoff;
  31         info->tcpi_pmtu         = dp->dccps_pmtu_cookie;
  32
  33         if (dp->dccps_options.dccpo_send_ack_vector)
  34                 info->tcpi_options |= TCPI_OPT_SACK;
  35
  36         ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
  37         ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
  38 }
  39
  40 static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
  41                                void *_info)
  42 {
  43         r->idiag_rqueue = r->idiag_wqueue = 0;
  44
  45         if (_info != NULL)
  46                 dccp_get_info(sk, _info);
  47 }
  48
  49 static struct inet_diag_handler dccp_diag_handler = {
  50         .idiag_hashinfo  = &dccp_hashinfo,
  51         .idiag_get_info  = dccp_diag_get_info,
  52         .idiag_type      = DCCPDIAG_GETSOCK,
  53         .idiag_info_size = sizeof(struct tcp_info),
  54 };
  55
  56 static int __init dccp_diag_init(void)
  57 {
  58         return inet_diag_register(&dccp_diag_handler);
  59 }
  60
  61 static void __exit dccp_diag_fini(void)
  62 {
  63         inet_diag_unregister(&dccp_diag_handler);
  64 }
  65
  66 module_init(dccp_diag_init);
  67 module_exit(dccp_diag_fini);
  68
  69 MODULE_LICENSE("GPL");
  70 MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
  71 MODULE_DESCRIPTION("DCCP inet_diag handler");