linux/include/net/inet_timewait_sock.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for a generic INET TIMEWAIT sock
 *
 *		From code originally in net/tcp.h
 */
#ifndef _INET_TIMEWAIT_SOCK_
#define _INET_TIMEWAIT_SOCK_

#include <linux/list.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>

#include <net/inet_sock.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <net/timewait_sock.h>

#include <linux/atomic.h>

struct inet_bind_bucket;

/*
 * This is a TIME_WAIT sock. It works around the memory consumption
 * problems of sockets in such a state on heavily loaded servers, but
 * without violating the protocol specification.
 */
struct inet_timewait_sock { … };
#define tw_tclass …

static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk)
{ … }

void inet_twsk_free(struct inet_timewait_sock *tw);
void inet_twsk_put(struct inet_timewait_sock *tw);

void inet_twsk_bind_unhash(struct inet_timewait_sock *tw,
			   struct inet_hashinfo *hashinfo);

struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk,
					   struct inet_timewait_death_row *dr,
					   const int state);

void inet_twsk_hashdance_schedule(struct inet_timewait_sock *tw,
				  struct sock *sk,
				  struct inet_hashinfo *hashinfo,
				  int timeo);

void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo,
			  bool rearm);

static inline void inet_twsk_reschedule(struct inet_timewait_sock *tw, int timeo)
{ … }

void inet_twsk_deschedule_put(struct inet_timewait_sock *tw);

void inet_twsk_purge(struct inet_hashinfo *hashinfo);

static inline
struct net *twsk_net(const struct inet_timewait_sock *twsk)
{ … }

static inline
void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net)
{ … }
#endif	/* _INET_TIMEWAIT_SOCK_ */