LXR linux/net/dccp/diag.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *  net/dccp/diag.c
   4 *
   5 *  An implementation of the DCCP protocol
   6 *  Arnaldo Carvalho de Melo <acme@mandriva.com>
   7 */
   8
   9
  10#include <linux/module.h>
  11#include <linux/inet_diag.h>
  12
  13#include "ccid.h"
  14#include "dccp.h"
  15
  16static void dccp_get_info(struct sock *sk, struct tcp_info *info)
  17{
  18        struct dccp_sock *dp = dccp_sk(sk);
  19        const struct inet_connection_sock *icsk = inet_csk(sk);
  20
  21        memset(info, 0, sizeof(*info));
  22
  23        info->tcpi_state        = sk->sk_state;
  24        info->tcpi_retransmits  = icsk->icsk_retransmits;
  25        info->tcpi_probes       = icsk->icsk_probes_out;
  26        info->tcpi_backoff      = icsk->icsk_backoff;
  27        info->tcpi_pmtu         = icsk->icsk_pmtu_cookie;
  28
  29        if (dp->dccps_hc_rx_ackvec != NULL)
  30                info->tcpi_options |= TCPI_OPT_SACK;
  31
  32        if (dp->dccps_hc_rx_ccid != NULL)
  33                ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
  34
  35        if (dp->dccps_hc_tx_ccid != NULL)
  36                ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
  37}
  38
  39static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
  40                               void *_info)
  41{
  42        r->idiag_rqueue = r->idiag_wqueue = 0;
  43
  44        if (_info != NULL)
  45                dccp_get_info(sk, _info);
  46}
  47
  48static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
  49                           const struct inet_diag_req_v2 *r)
  50{
  51        inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r);
  52}
  53
  54static int dccp_diag_dump_one(struct netlink_callback *cb,
  55                              const struct inet_diag_req_v2 *req)
  56{
  57        return inet_diag_dump_one_icsk(&dccp_hashinfo, cb, req);
  58}
  59
  60static const struct inet_diag_handler dccp_diag_handler = {
  61        .dump            = dccp_diag_dump,
  62        .dump_one        = dccp_diag_dump_one,
  63        .idiag_get_info  = dccp_diag_get_info,
  64        .idiag_type      = IPPROTO_DCCP,
  65        .idiag_info_size = sizeof(struct tcp_info),
  66};
  67
  68static int __init dccp_diag_init(void)
  69{
  70        return inet_diag_register(&dccp_diag_handler);
  71}
  72
  73static void __exit dccp_diag_fini(void)
  74{
  75        inet_diag_unregister(&dccp_diag_handler);
  76}
  77
  78module_init(dccp_diag_init);
  79module_exit(dccp_diag_fini);
  80
  81MODULE_LICENSE("GPL");
  82MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
  83MODULE_DESCRIPTION("DCCP inet_diag handler");
  84MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-33 /* AF_INET - IPPROTO_DCCP */);
  85