root/net/dccp/diag.c

DEFINITIONS

1. dccp_get_info
2. dccp_diag_get_info
3. dccp_diag_init
4. dccp_diag_fini

/*
 *  net/dccp/diag.c
 *
 *  An implementation of the DCCP protocol
 *  Arnaldo Carvalho de Melo <acme@mandriva.com>
 *
 *      This program is free software; you can redistribute it and/or modify it
 *      under the terms of the GNU General Public License version 2 as
 *      published by the Free Software Foundation.
 */


#include <linux/module.h>
#include <linux/inet_diag.h>

#include "ccid.h"
#include "dccp.h"

static void dccp_get_info(struct sock *sk, struct tcp_info *info)
{
        struct dccp_sock *dp = dccp_sk(sk);
        const struct inet_connection_sock *icsk = inet_csk(sk);

        memset(info, 0, sizeof(*info));

        info->tcpi_state        = sk->sk_state;
        info->tcpi_retransmits  = icsk->icsk_retransmits;
        info->tcpi_probes       = icsk->icsk_probes_out;
        info->tcpi_backoff      = icsk->icsk_backoff;
        info->tcpi_pmtu         = icsk->icsk_pmtu_cookie;

        if (dccp_msk(sk)->dccpms_send_ack_vector)
                info->tcpi_options |= TCPI_OPT_SACK;

        ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
        ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
}

static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
                               void *_info)
{
        r->idiag_rqueue = r->idiag_wqueue = 0;

        if (_info != NULL)
                dccp_get_info(sk, _info);
}

static struct inet_diag_handler dccp_diag_handler = {
        .idiag_hashinfo  = &dccp_hashinfo,
        .idiag_get_info  = dccp_diag_get_info,
        .idiag_type      = DCCPDIAG_GETSOCK,
        .idiag_info_size = sizeof(struct tcp_info),
};

static int __init dccp_diag_init(void)
{
        return inet_diag_register(&dccp_diag_handler);
}

static void __exit dccp_diag_fini(void)
{
        inet_diag_unregister(&dccp_diag_handler);
}

module_init(dccp_diag_init);
module_exit(dccp_diag_fini);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
MODULE_DESCRIPTION("DCCP inet_diag handler");
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_INET_DIAG, DCCPDIAG_GETSOCK);