[net-next-2.6.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/string.h>
#include <linux/timer.h>

#include <net/inet_sock.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_pmtu_cookie	   Last pmtu seen by socket
 * @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_ext_hdr_len:	   Network protocol overhead (IP/IPv6 options)
 * @icsk_ack:		   Delayed ACK control data
 * @icsk_mtup;		   MTU probing 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;
	__u32			  icsk_pmtu_cookie;
	const struct tcp_congestion_ops *icsk_ca_ops;
	const struct inet_connection_sock_af_ops *icsk_af_ops;
	unsigned int		  (*icsk_sync_mss)(struct sock *sk, u32 pmtu);
	__u8			  icsk_ca_state;
	__u8			  icsk_retransmits;
	__u8			  icsk_pending;
	__u8			  icsk_backoff;
	__u8			  icsk_syn_retries;
	__u8			  icsk_probes_out;
	__u16			  icsk_ext_hdr_len;
	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;
	struct {
		int		  enabled;

		/* Range of MTUs to search */
		int		  search_high;
		int		  search_low;

		/* Information on the current probe. */
		int		  probe_size;
	} icsk_mtup;
	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);

extern int inet_csk_ctl_sock_create(struct socket **sock,
				    unsigned short family,
				    unsigned short type,
				    unsigned char protocol);
#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>
3f421baa	19	#include <linux/string.h>
463c84b9	20	#include <linux/timer.h>
14c85021 ACM	21
14c85021 ACM	22	#include <net/inet_sock.h>
463c84b9 ACM	23	#include <net/request_sock.h>
463c84b9 ACM	24
3f421baa ACM	25	#define INET_CSK_DEBUG 1
	26
	27	/* Cancel timers, when they are not required. */
	28	#undef INET_CSK_CLEAR_TIMERS
	29
463c84b9 ACM	30	struct inet_bind_bucket;
463c84b9 ACM	31	struct inet_hashinfo;
6687e988	32	struct tcp_congestion_ops;
463c84b9	33
8292a17a ACM	34	/*
	35	* Pointers to address related TCP functions
	36	* (i.e. things that depend on the address family)
	37	*/
	38	struct inet_connection_sock_af_ops {
	39	int (queue_xmit)(struct sk_buff skb, int ipfragok);
	40	void (send_check)(struct sock sk, int len,
	41	struct sk_buff *skb);
	42	int (rebuild_header)(struct sock sk);
	43	int (conn_request)(struct sock sk, struct sk_buff *skb);
	44	struct sock (syn_recv_sock)(struct sock sk, struct sk_buff skb,
	45	struct request_sock *req,
	46	struct dst_entry *dst);
	47	int (remember_stamp)(struct sock sk);
	48	__u16 net_header_len;
	49	int (setsockopt)(struct sock sk, int level, int optname,
	50	char __user *optval, int optlen);
	51	int (getsockopt)(struct sock sk, int level, int optname,
	52	char __user optval, int __user optlen);
	53	void (addr2sockaddr)(struct sock sk, struct sockaddr *);
	54	int sockaddr_len;
	55	};
	56
463c84b9 ACM	57	/** inet_connection_sock - INET connection oriented sock
	58	*
	59	* @icsk_accept_queue: FIFO of established children
	60	* @icsk_bind_hash: Bind node
	61	* @icsk_timeout: Timeout
	62	* @icsk_retransmit_timer: Resend (no ack)
	63	* @icsk_rto: Retransmit timeout
d83d8461	64	* @icsk_pmtu_cookie Last pmtu seen by socket
6687e988	65	* @icsk_ca_ops Pluggable congestion control hook
8292a17a	66	* @icsk_af_ops Operations which are AF_INET{4,6} specific
6687e988	67	* @icsk_ca_state: Congestion control state
463c84b9 ACM	68	* @icsk_retransmits: Number of unrecovered [RTO] timeouts
	69	* @icsk_pending: Scheduled timer event
	70	* @icsk_backoff: Backoff
	71	* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
6687e988	72	* @icsk_probes_out: unanswered 0 window probes
d83d8461	73	* @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options)
463c84b9	74	* @icsk_ack: Delayed ACK control data
5d424d5a	75	* @icsk_mtup; MTU probing control data
463c84b9 ACM	76	*/
	77	struct inet_connection_sock {
	78	/* inet_sock has to be the first member! */
	79	struct inet_sock icsk_inet;
	80	struct request_sock_queue icsk_accept_queue;
	81	struct inet_bind_bucket *icsk_bind_hash;
	82	unsigned long icsk_timeout;
	83	struct timer_list icsk_retransmit_timer;
	84	struct timer_list icsk_delack_timer;
	85	__u32 icsk_rto;
d83d8461	86	__u32 icsk_pmtu_cookie;
770cfbcf SH	87	const struct tcp_congestion_ops *icsk_ca_ops;
770cfbcf SH	88	const struct inet_connection_sock_af_ops *icsk_af_ops;
d83d8461	89	unsigned int (icsk_sync_mss)(struct sock sk, u32 pmtu);
6687e988	90	__u8 icsk_ca_state;
463c84b9 ACM	91	__u8 icsk_retransmits;
	92	__u8 icsk_pending;
	93	__u8 icsk_backoff;
	94	__u8 icsk_syn_retries;
6687e988	95	__u8 icsk_probes_out;
d83d8461	96	__u16 icsk_ext_hdr_len;
463c84b9 ACM	97	struct {
	98	__u8 pending; /* ACK is pending */
	99	__u8 quick; /* Scheduled number of quick acks */
	100	__u8 pingpong; /* The session is interactive */
	101	__u8 blocked; /* Delayed ACK was blocked by socket lock */
	102	__u32 ato; /* Predicted tick of soft clock */
	103	unsigned long timeout; /* Currently scheduled timeout */
	104	__u32 lrcvtime; /* timestamp of last received data packet */
	105	__u16 last_seg_size; /* Size of last incoming segment */
	106	__u16 rcv_mss; /* MSS used for delayed ACK decisions */
	107	} icsk_ack;
5d424d5a JH	108	struct {
	109	int enabled;
	110
	111	/* Range of MTUs to search */
	112	int search_high;
	113	int search_low;
	114
	115	/* Information on the current probe. */
	116	int probe_size;
5d424d5a	117	} icsk_mtup;
6687e988 ACM	118	u32 icsk_ca_priv[16];
6687e988 ACM	119	#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32))
463c84b9 ACM	120	};
463c84b9 ACM	121
3f421baa ACM	122	#define ICSK_TIME_RETRANS 1 /* Retransmit timer */
	123	#define ICSK_TIME_DACK 2 /* Delayed ack timer */
	124	#define ICSK_TIME_PROBE0 3 /* Zero window probe timer */
	125	#define ICSK_TIME_KEEPOPEN 4 /* Keepalive timer */
	126
463c84b9 ACM	127	static inline struct inet_connection_sock inet_csk(const struct sock sk)
	128	{
	129	return (struct inet_connection_sock *)sk;
	130	}
	131
6687e988 ACM	132	static inline void inet_csk_ca(const struct sock sk)
	133	{
	134	return (void *)inet_csk(sk)->icsk_ca_priv;
	135	}
	136
9f1d2604 ACM	137	extern struct sock inet_csk_clone(struct sock sk,
9f1d2604 ACM	138	const struct request_sock *req,
dd0fc66f	139	const gfp_t priority);
9f1d2604	140
3f421baa ACM	141	enum inet_csk_ack_state_t {
	142	ICSK_ACK_SCHED = 1,
	143	ICSK_ACK_TIMER = 2,
	144	ICSK_ACK_PUSHED = 4
	145	};
	146
463c84b9 ACM	147	extern void inet_csk_init_xmit_timers(struct sock *sk,
	148	void (*retransmit_handler)(unsigned long),
	149	void (*delack_handler)(unsigned long),
	150	void (*keepalive_handler)(unsigned long));
	151	extern void inet_csk_clear_xmit_timers(struct sock *sk);
	152
3f421baa ACM	153	static inline void inet_csk_schedule_ack(struct sock *sk)
	154	{
	155	inet_csk(sk)->icsk_ack.pending \|= ICSK_ACK_SCHED;
	156	}
	157
	158	static inline int inet_csk_ack_scheduled(const struct sock *sk)
	159	{
	160	return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
	161	}
	162
	163	static inline void inet_csk_delack_init(struct sock *sk)
	164	{
	165	memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
	166	}
	167
	168	extern void inet_csk_delete_keepalive_timer(struct sock *sk);
	169	extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);
	170
	171	#ifdef INET_CSK_DEBUG
	172	extern const char inet_csk_timer_bug_msg[];
	173	#endif
	174
	175	static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
	176	{
	177	struct inet_connection_sock *icsk = inet_csk(sk);
	178
	179	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	180	icsk->icsk_pending = 0;
	181	#ifdef INET_CSK_CLEAR_TIMERS
	182	sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
	183	#endif
	184	} else if (what == ICSK_TIME_DACK) {
	185	icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
	186	#ifdef INET_CSK_CLEAR_TIMERS
	187	sk_stop_timer(sk, &icsk->icsk_delack_timer);
	188	#endif
	189	}
	190	#ifdef INET_CSK_DEBUG
	191	else {
d8971fcb	192	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	193	}
	194	#endif
	195	}
	196
	197	/*
	198	* Reset the retransmission timer
	199	*/
	200	static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
	201	unsigned long when,
	202	const unsigned long max_when)
	203	{
	204	struct inet_connection_sock *icsk = inet_csk(sk);
	205
	206	if (when > max_when) {
	207	#ifdef INET_CSK_DEBUG
	208	pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
	209	sk, what, when, current_text_addr());
	210	#endif
	211	when = max_when;
	212	}
	213
	214	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	215	icsk->icsk_pending = what;
	216	icsk->icsk_timeout = jiffies + when;
	217	sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
	218	} else if (what == ICSK_TIME_DACK) {
	219	icsk->icsk_ack.pending \|= ICSK_ACK_TIMER;
	220	icsk->icsk_ack.timeout = jiffies + when;
	221	sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
	222	}
	223	#ifdef INET_CSK_DEBUG
	224	else {
d8971fcb	225	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	226	}
	227	#endif
	228	}
	229
	230	extern struct sock inet_csk_accept(struct sock sk, int flags, int *err);
	231
463c84b9 ACM	232	extern struct request_sock inet_csk_search_req(const struct sock sk,
	233	struct request_sock ***prevp,
	234	const __u16 rport,
	235	const __u32 raddr,
	236	const __u32 laddr);
971af18b ACM	237	extern int inet_csk_bind_conflict(const struct sock *sk,
971af18b ACM	238	const struct inet_bind_bucket *tb);
463c84b9	239	extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
971af18b ACM	240	struct sock *sk, unsigned short snum,
	241	int (bind_conflict)(const struct sock sk,
	242	const struct inet_bind_bucket *tb));
463c84b9 ACM	243
	244	extern struct dst_entry* inet_csk_route_req(struct sock *sk,
	245	const struct request_sock *req);
	246
3f421baa ACM	247	static inline void inet_csk_reqsk_queue_add(struct sock *sk,
	248	struct request_sock *req,
	249	struct sock *child)
	250	{
	251	reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child);
	252	}
	253
	254	extern void inet_csk_reqsk_queue_hash_add(struct sock *sk,
	255	struct request_sock *req,
c2977c22	256	unsigned long timeout);
3f421baa ACM	257
	258	static inline void inet_csk_reqsk_queue_removed(struct sock *sk,
	259	struct request_sock *req)
	260	{
	261	if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0)
	262	inet_csk_delete_keepalive_timer(sk);
	263	}
	264
	265	static inline void inet_csk_reqsk_queue_added(struct sock *sk,
	266	const unsigned long timeout)
	267	{
	268	if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0)
	269	inet_csk_reset_keepalive_timer(sk, timeout);
	270	}
	271
	272	static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
	273	{
	274	return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
	275	}
	276
	277	static inline int inet_csk_reqsk_queue_young(const struct sock *sk)
	278	{
	279	return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue);
	280	}
	281
	282	static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
	283	{
	284	return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
	285	}
	286
	287	static inline void inet_csk_reqsk_queue_unlink(struct sock *sk,
	288	struct request_sock *req,
	289	struct request_sock **prev)
	290	{
	291	reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev);
	292	}
	293
	294	static inline void inet_csk_reqsk_queue_drop(struct sock *sk,
	295	struct request_sock *req,
	296	struct request_sock **prev)
	297	{
	298	inet_csk_reqsk_queue_unlink(sk, req, prev);
	299	inet_csk_reqsk_queue_removed(sk, req);
	300	reqsk_free(req);
	301	}
	302
a019d6fe ACM	303	extern void inet_csk_reqsk_queue_prune(struct sock *parent,
	304	const unsigned long interval,
	305	const unsigned long timeout,
	306	const unsigned long max_rto);
	307
	308	extern void inet_csk_destroy_sock(struct sock *sk);
dc40c7bc ACM	309
	310	/*
	311	* LISTEN is a special case for poll..
	312	*/
	313	static inline unsigned int inet_csk_listen_poll(const struct sock *sk)
	314	{
	315	return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?
	316	(POLLIN \| POLLRDNORM) : 0;
	317	}
	318
a019d6fe	319	extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries);
295f7324 ACM	320	extern void inet_csk_listen_stop(struct sock *sk);
295f7324 ACM	321
af05dc93 ACM	322	extern void inet_csk_addr2sockaddr(struct sock sk, struct sockaddr uaddr);
af05dc93 ACM	323
c4d93909 ACM	324	extern int inet_csk_ctl_sock_create(struct socket **sock,
	325	unsigned short family,
	326	unsigned short type,
	327	unsigned char protocol);
463c84b9	328	#endif /* _INET_CONNECTION_SOCK_H */