[mirror_ubuntu-hirsute-kernel.git] / include / net / inet_connection_sock.h

/*
 * NET		Generic infrastructure for INET connection oriented protocols.
 *
 *		Definitions for inet_connection_sock 
 *
 * Authors:	Many people, see the TCP sources
 *
 * 		From code originally in TCP
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */
#ifndef _INET_CONNECTION_SOCK_H
#define _INET_CONNECTION_SOCK_H

#include <linux/compiler.h>
#include <linux/ip.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <net/request_sock.h>

#define INET_CSK_DEBUG 1

/* Cancel timers, when they are not required. */
#undef INET_CSK_CLEAR_TIMERS

struct inet_bind_bucket;
struct inet_hashinfo;
struct tcp_congestion_ops;

/*
 * Pointers to address related TCP functions
 * (i.e. things that depend on the address family)
 */
struct inet_connection_sock_af_ops {
	int	    (*queue_xmit)(struct sk_buff *skb, int ipfragok);
	void	    (*send_check)(struct sock *sk, int len,
				  struct sk_buff *skb);
	int	    (*rebuild_header)(struct sock *sk);
	int	    (*conn_request)(struct sock *sk, struct sk_buff *skb);
	struct sock *(*syn_recv_sock)(struct sock *sk, struct sk_buff *skb,
				      struct request_sock *req,
				      struct dst_entry *dst);
	int	    (*remember_stamp)(struct sock *sk);
	__u16	    net_header_len;
	int	    (*setsockopt)(struct sock *sk, int level, int optname, 
				  char __user *optval, int optlen);
	int	    (*getsockopt)(struct sock *sk, int level, int optname, 
				  char __user *optval, int __user *optlen);
	void	    (*addr2sockaddr)(struct sock *sk, struct sockaddr *);
	int sockaddr_len;
};

/** inet_connection_sock - INET connection oriented sock
 *
 * @icsk_accept_queue:	   FIFO of established children 
 * @icsk_bind_hash:	   Bind node
 * @icsk_timeout:	   Timeout
 * @icsk_retransmit_timer: Resend (no ack)
 * @icsk_rto:		   Retransmit timeout
 * @icsk_ca_ops		   Pluggable congestion control hook
 * @icsk_af_ops		   Operations which are AF_INET{4,6} specific
 * @icsk_ca_state:	   Congestion control state
 * @icsk_retransmits:	   Number of unrecovered [RTO] timeouts
 * @icsk_pending:	   Scheduled timer event
 * @icsk_backoff:	   Backoff
 * @icsk_syn_retries:      Number of allowed SYN (or equivalent) retries
 * @icsk_probes_out:	   unanswered 0 window probes
 * @icsk_ack:		   Delayed ACK control data
 */
struct inet_connection_sock {
	/* inet_sock has to be the first member! */
	struct inet_sock	  icsk_inet;
	struct request_sock_queue icsk_accept_queue;
	struct inet_bind_bucket	  *icsk_bind_hash;
	unsigned long		  icsk_timeout;
 	struct timer_list	  icsk_retransmit_timer;
 	struct timer_list	  icsk_delack_timer;
	__u32			  icsk_rto;
	struct tcp_congestion_ops *icsk_ca_ops;
	struct inet_connection_sock_af_ops *icsk_af_ops;
	__u8			  icsk_ca_state;
	__u8			  icsk_retransmits;
	__u8			  icsk_pending;
	__u8			  icsk_backoff;
	__u8			  icsk_syn_retries;
	__u8			  icsk_probes_out;
	/* 2 BYTES HOLE, TRY TO PACK! */
	struct {
		__u8		  pending;	 /* ACK is pending			   */
		__u8		  quick;	 /* Scheduled number of quick acks	   */
		__u8		  pingpong;	 /* The session is interactive		   */
		__u8		  blocked;	 /* Delayed ACK was blocked by socket lock */
		__u32		  ato;		 /* Predicted tick of soft clock	   */
		unsigned long	  timeout;	 /* Currently scheduled timeout		   */
		__u32		  lrcvtime;	 /* timestamp of last received data packet */
		__u16		  last_seg_size; /* Size of last incoming segment	   */
		__u16		  rcv_mss;	 /* MSS used for delayed ACK decisions	   */ 
	} icsk_ack;
	u32			  icsk_ca_priv[16];
#define ICSK_CA_PRIV_SIZE	(16 * sizeof(u32))
};

#define ICSK_TIME_RETRANS	1	/* Retransmit timer */
#define ICSK_TIME_DACK		2	/* Delayed ack timer */
#define ICSK_TIME_PROBE0	3	/* Zero window probe timer */
#define ICSK_TIME_KEEPOPEN	4	/* Keepalive timer */

static inline struct inet_connection_sock *inet_csk(const struct sock *sk)
{
	return (struct inet_connection_sock *)sk;
}

static inline void *inet_csk_ca(const struct sock *sk)
{
	return (void *)inet_csk(sk)->icsk_ca_priv;
}

extern struct sock *inet_csk_clone(struct sock *sk,
				   const struct request_sock *req,
				   const gfp_t priority);

enum inet_csk_ack_state_t {
	ICSK_ACK_SCHED	= 1,
	ICSK_ACK_TIMER  = 2,
	ICSK_ACK_PUSHED = 4
};

extern void inet_csk_init_xmit_timers(struct sock *sk,
				      void (*retransmit_handler)(unsigned long),
				      void (*delack_handler)(unsigned long),
				      void (*keepalive_handler)(unsigned long));
extern void inet_csk_clear_xmit_timers(struct sock *sk);

static inline void inet_csk_schedule_ack(struct sock *sk)
{
	inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED;
}

static inline int inet_csk_ack_scheduled(const struct sock *sk)
{
	return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
}

static inline void inet_csk_delack_init(struct sock *sk)
{
	memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
}

extern void inet_csk_delete_keepalive_timer(struct sock *sk);
extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);

#ifdef INET_CSK_DEBUG
extern const char inet_csk_timer_bug_msg[];
#endif

static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
{
	struct inet_connection_sock *icsk = inet_csk(sk);
	
	if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) {
		icsk->icsk_pending = 0;
#ifdef INET_CSK_CLEAR_TIMERS
		sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
#endif
	} else if (what == ICSK_TIME_DACK) {
		icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
#ifdef INET_CSK_CLEAR_TIMERS
		sk_stop_timer(sk, &icsk->icsk_delack_timer);
#endif
	}
#ifdef INET_CSK_DEBUG
	else {
		pr_debug("%s", inet_csk_timer_bug_msg);
	}
#endif
}

/*
 *	Reset the retransmission timer
 */
static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
					     unsigned long when,
					     const unsigned long max_when)
{
	struct inet_connection_sock *icsk = inet_csk(sk);

	if (when > max_when) {
#ifdef INET_CSK_DEBUG
		pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
			 sk, what, when, current_text_addr());
#endif
		when = max_when;
	}

	if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) {
		icsk->icsk_pending = what;
		icsk->icsk_timeout = jiffies + when;
		sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
	} else if (what == ICSK_TIME_DACK) {
		icsk->icsk_ack.pending |= ICSK_ACK_TIMER;
		icsk->icsk_ack.timeout = jiffies + when;
		sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
	}
#ifdef INET_CSK_DEBUG
	else {
		pr_debug("%s", inet_csk_timer_bug_msg);
	}
#endif
}

extern struct sock *inet_csk_accept(struct sock *sk, int flags, int *err);

extern struct request_sock *inet_csk_search_req(const struct sock *sk,
						struct request_sock ***prevp,
						const __u16 rport,
						const __u32 raddr,
						const __u32 laddr);
extern int inet_csk_bind_conflict(const struct sock *sk,
				  const struct inet_bind_bucket *tb);
extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
			     struct sock *sk, unsigned short snum,
			     int (*bind_conflict)(const struct sock *sk,
						  const struct inet_bind_bucket *tb));

extern struct dst_entry* inet_csk_route_req(struct sock *sk,
					    const struct request_sock *req);

static inline void inet_csk_reqsk_queue_add(struct sock *sk,
					    struct request_sock *req,
					    struct sock *child)
{
	reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child);
}

extern void inet_csk_reqsk_queue_hash_add(struct sock *sk,
					  struct request_sock *req,
					  unsigned long timeout);

static inline void inet_csk_reqsk_queue_removed(struct sock *sk,
						struct request_sock *req)
{
	if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0)
		inet_csk_delete_keepalive_timer(sk);
}

static inline void inet_csk_reqsk_queue_added(struct sock *sk,
					      const unsigned long timeout)
{
	if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0)
		inet_csk_reset_keepalive_timer(sk, timeout);
}

static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
{
	return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
}

static inline int inet_csk_reqsk_queue_young(const struct sock *sk)
{
	return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue);
}

static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
{
	return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
}

static inline void inet_csk_reqsk_queue_unlink(struct sock *sk,
					       struct request_sock *req,
					       struct request_sock **prev)
{
	reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev);
}

static inline void inet_csk_reqsk_queue_drop(struct sock *sk,
					     struct request_sock *req,
					     struct request_sock **prev)
{
	inet_csk_reqsk_queue_unlink(sk, req, prev);
	inet_csk_reqsk_queue_removed(sk, req);
	reqsk_free(req);
}

extern void inet_csk_reqsk_queue_prune(struct sock *parent,
				       const unsigned long interval,
				       const unsigned long timeout,
				       const unsigned long max_rto);

extern void inet_csk_destroy_sock(struct sock *sk);

/*
 * LISTEN is a special case for poll..
 */
static inline unsigned int inet_csk_listen_poll(const struct sock *sk)
{
	return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?
			(POLLIN | POLLRDNORM) : 0;
}

extern int  inet_csk_listen_start(struct sock *sk, const int nr_table_entries);
extern void inet_csk_listen_stop(struct sock *sk);

extern void inet_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);

#endif /* _INET_CONNECTION_SOCK_H */
Commit	Line	Data
463c84b9 ACM	1	/*
	2	* NET Generic infrastructure for INET connection oriented protocols.
	3	*
	4	* Definitions for inet_connection_sock
	5	*
	6	* Authors: Many people, see the TCP sources
	7	*
	8	* From code originally in TCP
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* as published by the Free Software Foundation; either version
	13	* 2 of the License, or (at your option) any later version.
	14	*/
	15	#ifndef _INET_CONNECTION_SOCK_H
	16	#define _INET_CONNECTION_SOCK_H
	17
8292a17a	18	#include <linux/compiler.h>
463c84b9	19	#include <linux/ip.h>
3f421baa	20	#include <linux/string.h>
463c84b9 ACM	21	#include <linux/timer.h>
	22	#include <net/request_sock.h>
	23
3f421baa ACM	24	#define INET_CSK_DEBUG 1
	25
	26	/* Cancel timers, when they are not required. */
	27	#undef INET_CSK_CLEAR_TIMERS
	28
463c84b9 ACM	29	struct inet_bind_bucket;
463c84b9 ACM	30	struct inet_hashinfo;
6687e988	31	struct tcp_congestion_ops;
463c84b9	32
8292a17a ACM	33	/*
	34	* Pointers to address related TCP functions
	35	* (i.e. things that depend on the address family)
	36	*/
	37	struct inet_connection_sock_af_ops {
	38	int (queue_xmit)(struct sk_buff skb, int ipfragok);
	39	void (send_check)(struct sock sk, int len,
	40	struct sk_buff *skb);
	41	int (rebuild_header)(struct sock sk);
	42	int (conn_request)(struct sock sk, struct sk_buff *skb);
	43	struct sock (syn_recv_sock)(struct sock sk, struct sk_buff skb,
	44	struct request_sock *req,
	45	struct dst_entry *dst);
	46	int (remember_stamp)(struct sock sk);
	47	__u16 net_header_len;
	48	int (setsockopt)(struct sock sk, int level, int optname,
	49	char __user *optval, int optlen);
	50	int (getsockopt)(struct sock sk, int level, int optname,
	51	char __user optval, int __user optlen);
	52	void (addr2sockaddr)(struct sock sk, struct sockaddr *);
	53	int sockaddr_len;
	54	};
	55
463c84b9 ACM	56	/** inet_connection_sock - INET connection oriented sock
	57	*
	58	* @icsk_accept_queue: FIFO of established children
	59	* @icsk_bind_hash: Bind node
	60	* @icsk_timeout: Timeout
	61	* @icsk_retransmit_timer: Resend (no ack)
	62	* @icsk_rto: Retransmit timeout
6687e988	63	* @icsk_ca_ops Pluggable congestion control hook
8292a17a	64	* @icsk_af_ops Operations which are AF_INET{4,6} specific
6687e988	65	* @icsk_ca_state: Congestion control state
463c84b9 ACM	66	* @icsk_retransmits: Number of unrecovered [RTO] timeouts
	67	* @icsk_pending: Scheduled timer event
	68	* @icsk_backoff: Backoff
	69	* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
6687e988	70	* @icsk_probes_out: unanswered 0 window probes
463c84b9 ACM	71	* @icsk_ack: Delayed ACK control data
	72	*/
	73	struct inet_connection_sock {
	74	/* inet_sock has to be the first member! */
	75	struct inet_sock icsk_inet;
	76	struct request_sock_queue icsk_accept_queue;
	77	struct inet_bind_bucket *icsk_bind_hash;
	78	unsigned long icsk_timeout;
	79	struct timer_list icsk_retransmit_timer;
	80	struct timer_list icsk_delack_timer;
	81	__u32 icsk_rto;
6687e988	82	struct tcp_congestion_ops *icsk_ca_ops;
8292a17a	83	struct inet_connection_sock_af_ops *icsk_af_ops;
6687e988	84	__u8 icsk_ca_state;
463c84b9 ACM	85	__u8 icsk_retransmits;
	86	__u8 icsk_pending;
	87	__u8 icsk_backoff;
	88	__u8 icsk_syn_retries;
6687e988 ACM	89	__u8 icsk_probes_out;
6687e988 ACM	90	/* 2 BYTES HOLE, TRY TO PACK! */
463c84b9 ACM	91	struct {
	92	__u8 pending; /* ACK is pending */
	93	__u8 quick; /* Scheduled number of quick acks */
	94	__u8 pingpong; /* The session is interactive */
	95	__u8 blocked; /* Delayed ACK was blocked by socket lock */
	96	__u32 ato; /* Predicted tick of soft clock */
	97	unsigned long timeout; /* Currently scheduled timeout */
	98	__u32 lrcvtime; /* timestamp of last received data packet */
	99	__u16 last_seg_size; /* Size of last incoming segment */
	100	__u16 rcv_mss; /* MSS used for delayed ACK decisions */
	101	} icsk_ack;
6687e988 ACM	102	u32 icsk_ca_priv[16];
6687e988 ACM	103	#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32))
463c84b9 ACM	104	};
463c84b9 ACM	105
3f421baa ACM	106	#define ICSK_TIME_RETRANS 1 /* Retransmit timer */
	107	#define ICSK_TIME_DACK 2 /* Delayed ack timer */
	108	#define ICSK_TIME_PROBE0 3 /* Zero window probe timer */
	109	#define ICSK_TIME_KEEPOPEN 4 /* Keepalive timer */
	110
463c84b9 ACM	111	static inline struct inet_connection_sock inet_csk(const struct sock sk)
	112	{
	113	return (struct inet_connection_sock *)sk;
	114	}
	115
6687e988 ACM	116	static inline void inet_csk_ca(const struct sock sk)
	117	{
	118	return (void *)inet_csk(sk)->icsk_ca_priv;
	119	}
	120
9f1d2604 ACM	121	extern struct sock inet_csk_clone(struct sock sk,
9f1d2604 ACM	122	const struct request_sock *req,
dd0fc66f	123	const gfp_t priority);
9f1d2604	124
3f421baa ACM	125	enum inet_csk_ack_state_t {
	126	ICSK_ACK_SCHED = 1,
	127	ICSK_ACK_TIMER = 2,
	128	ICSK_ACK_PUSHED = 4
	129	};
	130
463c84b9 ACM	131	extern void inet_csk_init_xmit_timers(struct sock *sk,
	132	void (*retransmit_handler)(unsigned long),
	133	void (*delack_handler)(unsigned long),
	134	void (*keepalive_handler)(unsigned long));
	135	extern void inet_csk_clear_xmit_timers(struct sock *sk);
	136
3f421baa ACM	137	static inline void inet_csk_schedule_ack(struct sock *sk)
	138	{
	139	inet_csk(sk)->icsk_ack.pending \|= ICSK_ACK_SCHED;
	140	}
	141
	142	static inline int inet_csk_ack_scheduled(const struct sock *sk)
	143	{
	144	return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
	145	}
	146
	147	static inline void inet_csk_delack_init(struct sock *sk)
	148	{
	149	memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
	150	}
	151
	152	extern void inet_csk_delete_keepalive_timer(struct sock *sk);
	153	extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);
	154
	155	#ifdef INET_CSK_DEBUG
	156	extern const char inet_csk_timer_bug_msg[];
	157	#endif
	158
	159	static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
	160	{
	161	struct inet_connection_sock *icsk = inet_csk(sk);
	162
	163	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	164	icsk->icsk_pending = 0;
	165	#ifdef INET_CSK_CLEAR_TIMERS
	166	sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
	167	#endif
	168	} else if (what == ICSK_TIME_DACK) {
	169	icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
	170	#ifdef INET_CSK_CLEAR_TIMERS
	171	sk_stop_timer(sk, &icsk->icsk_delack_timer);
	172	#endif
	173	}
	174	#ifdef INET_CSK_DEBUG
	175	else {
d8971fcb	176	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	177	}
	178	#endif
	179	}
	180
	181	/*
	182	* Reset the retransmission timer
	183	*/
	184	static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
	185	unsigned long when,
	186	const unsigned long max_when)
	187	{
	188	struct inet_connection_sock *icsk = inet_csk(sk);
	189
	190	if (when > max_when) {
	191	#ifdef INET_CSK_DEBUG
	192	pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
	193	sk, what, when, current_text_addr());
	194	#endif
	195	when = max_when;
	196	}
	197
	198	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	199	icsk->icsk_pending = what;
	200	icsk->icsk_timeout = jiffies + when;
	201	sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
	202	} else if (what == ICSK_TIME_DACK) {
	203	icsk->icsk_ack.pending \|= ICSK_ACK_TIMER;
	204	icsk->icsk_ack.timeout = jiffies + when;
	205	sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
	206	}
	207	#ifdef INET_CSK_DEBUG
	208	else {
d8971fcb	209	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	210	}
	211	#endif
	212	}
	213
	214	extern struct sock inet_csk_accept(struct sock sk, int flags, int *err);
	215
463c84b9 ACM	216	extern struct request_sock inet_csk_search_req(const struct sock sk,
	217	struct request_sock ***prevp,
	218	const __u16 rport,
	219	const __u32 raddr,
	220	const __u32 laddr);
971af18b ACM	221	extern int inet_csk_bind_conflict(const struct sock *sk,
971af18b ACM	222	const struct inet_bind_bucket *tb);
463c84b9	223	extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
971af18b ACM	224	struct sock *sk, unsigned short snum,
	225	int (bind_conflict)(const struct sock sk,
	226	const struct inet_bind_bucket *tb));
463c84b9 ACM	227
	228	extern struct dst_entry* inet_csk_route_req(struct sock *sk,
	229	const struct request_sock *req);
	230
3f421baa ACM	231	static inline void inet_csk_reqsk_queue_add(struct sock *sk,
	232	struct request_sock *req,
	233	struct sock *child)
	234	{
	235	reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child);
	236	}
	237
	238	extern void inet_csk_reqsk_queue_hash_add(struct sock *sk,
	239	struct request_sock *req,
c2977c22	240	unsigned long timeout);
3f421baa ACM	241
	242	static inline void inet_csk_reqsk_queue_removed(struct sock *sk,
	243	struct request_sock *req)
	244	{
	245	if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0)
	246	inet_csk_delete_keepalive_timer(sk);
	247	}
	248
	249	static inline void inet_csk_reqsk_queue_added(struct sock *sk,
	250	const unsigned long timeout)
	251	{
	252	if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0)
	253	inet_csk_reset_keepalive_timer(sk, timeout);
	254	}
	255
	256	static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
	257	{
	258	return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
	259	}
	260
	261	static inline int inet_csk_reqsk_queue_young(const struct sock *sk)
	262	{
	263	return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue);
	264	}
	265
	266	static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
	267	{
	268	return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
	269	}
	270
	271	static inline void inet_csk_reqsk_queue_unlink(struct sock *sk,
	272	struct request_sock *req,
	273	struct request_sock **prev)
	274	{
	275	reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev);
	276	}
	277
	278	static inline void inet_csk_reqsk_queue_drop(struct sock *sk,
	279	struct request_sock *req,
	280	struct request_sock **prev)
	281	{
	282	inet_csk_reqsk_queue_unlink(sk, req, prev);
	283	inet_csk_reqsk_queue_removed(sk, req);
	284	reqsk_free(req);
	285	}
	286
a019d6fe ACM	287	extern void inet_csk_reqsk_queue_prune(struct sock *parent,
	288	const unsigned long interval,
	289	const unsigned long timeout,
	290	const unsigned long max_rto);
	291
	292	extern void inet_csk_destroy_sock(struct sock *sk);
dc40c7bc ACM	293
	294	/*
	295	* LISTEN is a special case for poll..
	296	*/
	297	static inline unsigned int inet_csk_listen_poll(const struct sock *sk)
	298	{
	299	return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?
	300	(POLLIN \| POLLRDNORM) : 0;
	301	}
	302
a019d6fe	303	extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries);
295f7324 ACM	304	extern void inet_csk_listen_stop(struct sock *sk);
295f7324 ACM	305
af05dc93 ACM	306	extern void inet_csk_addr2sockaddr(struct sock sk, struct sockaddr uaddr);
af05dc93 ACM	307
463c84b9	308	#endif /* _INET_CONNECTION_SOCK_H */