[deliverable/linux.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);
	int	    (*compat_setsockopt)(struct sock *sk,
				int level, int optname,
				char __user *optval, int optlen);
	int	    (*compat_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);
3fdadf7d DM	53	int (compat_setsockopt)(struct sock sk,
	54	int level, int optname,
	55	char __user *optval, int optlen);
	56	int (compat_getsockopt)(struct sock sk,
	57	int level, int optname,
	58	char __user optval, int __user optlen);
8292a17a ACM	59	void (addr2sockaddr)(struct sock sk, struct sockaddr *);
	60	int sockaddr_len;
	61	};
	62
463c84b9 ACM	63	/** inet_connection_sock - INET connection oriented sock
	64	*
	65	* @icsk_accept_queue: FIFO of established children
	66	* @icsk_bind_hash: Bind node
	67	* @icsk_timeout: Timeout
	68	* @icsk_retransmit_timer: Resend (no ack)
	69	* @icsk_rto: Retransmit timeout
d83d8461	70	* @icsk_pmtu_cookie Last pmtu seen by socket
6687e988	71	* @icsk_ca_ops Pluggable congestion control hook
8292a17a	72	* @icsk_af_ops Operations which are AF_INET{4,6} specific
6687e988	73	* @icsk_ca_state: Congestion control state
463c84b9 ACM	74	* @icsk_retransmits: Number of unrecovered [RTO] timeouts
	75	* @icsk_pending: Scheduled timer event
	76	* @icsk_backoff: Backoff
	77	* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
6687e988	78	* @icsk_probes_out: unanswered 0 window probes
d83d8461	79	* @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options)
463c84b9	80	* @icsk_ack: Delayed ACK control data
5d424d5a	81	* @icsk_mtup; MTU probing control data
463c84b9 ACM	82	*/
	83	struct inet_connection_sock {
	84	/* inet_sock has to be the first member! */
	85	struct inet_sock icsk_inet;
	86	struct request_sock_queue icsk_accept_queue;
	87	struct inet_bind_bucket *icsk_bind_hash;
	88	unsigned long icsk_timeout;
	89	struct timer_list icsk_retransmit_timer;
	90	struct timer_list icsk_delack_timer;
	91	__u32 icsk_rto;
d83d8461	92	__u32 icsk_pmtu_cookie;
770cfbcf SH	93	const struct tcp_congestion_ops *icsk_ca_ops;
770cfbcf SH	94	const struct inet_connection_sock_af_ops *icsk_af_ops;
d83d8461	95	unsigned int (icsk_sync_mss)(struct sock sk, u32 pmtu);
6687e988	96	__u8 icsk_ca_state;
463c84b9 ACM	97	__u8 icsk_retransmits;
	98	__u8 icsk_pending;
	99	__u8 icsk_backoff;
	100	__u8 icsk_syn_retries;
6687e988	101	__u8 icsk_probes_out;
d83d8461	102	__u16 icsk_ext_hdr_len;
463c84b9 ACM	103	struct {
	104	__u8 pending; /* ACK is pending */
	105	__u8 quick; /* Scheduled number of quick acks */
	106	__u8 pingpong; /* The session is interactive */
	107	__u8 blocked; /* Delayed ACK was blocked by socket lock */
	108	__u32 ato; /* Predicted tick of soft clock */
	109	unsigned long timeout; /* Currently scheduled timeout */
	110	__u32 lrcvtime; /* timestamp of last received data packet */
	111	__u16 last_seg_size; /* Size of last incoming segment */
	112	__u16 rcv_mss; /* MSS used for delayed ACK decisions */
	113	} icsk_ack;
5d424d5a JH	114	struct {
	115	int enabled;
	116
	117	/* Range of MTUs to search */
	118	int search_high;
	119	int search_low;
	120
	121	/* Information on the current probe. */
	122	int probe_size;
5d424d5a	123	} icsk_mtup;
6687e988 ACM	124	u32 icsk_ca_priv[16];
6687e988 ACM	125	#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32))
463c84b9 ACM	126	};
463c84b9 ACM	127
3f421baa ACM	128	#define ICSK_TIME_RETRANS 1 /* Retransmit timer */
	129	#define ICSK_TIME_DACK 2 /* Delayed ack timer */
	130	#define ICSK_TIME_PROBE0 3 /* Zero window probe timer */
	131	#define ICSK_TIME_KEEPOPEN 4 /* Keepalive timer */
	132
463c84b9 ACM	133	static inline struct inet_connection_sock inet_csk(const struct sock sk)
	134	{
	135	return (struct inet_connection_sock *)sk;
	136	}
	137
6687e988 ACM	138	static inline void inet_csk_ca(const struct sock sk)
	139	{
	140	return (void *)inet_csk(sk)->icsk_ca_priv;
	141	}
	142
9f1d2604 ACM	143	extern struct sock inet_csk_clone(struct sock sk,
9f1d2604 ACM	144	const struct request_sock *req,
dd0fc66f	145	const gfp_t priority);
9f1d2604	146
3f421baa ACM	147	enum inet_csk_ack_state_t {
	148	ICSK_ACK_SCHED = 1,
	149	ICSK_ACK_TIMER = 2,
	150	ICSK_ACK_PUSHED = 4
	151	};
	152
463c84b9 ACM	153	extern void inet_csk_init_xmit_timers(struct sock *sk,
	154	void (*retransmit_handler)(unsigned long),
	155	void (*delack_handler)(unsigned long),
	156	void (*keepalive_handler)(unsigned long));
	157	extern void inet_csk_clear_xmit_timers(struct sock *sk);
	158
3f421baa ACM	159	static inline void inet_csk_schedule_ack(struct sock *sk)
	160	{
	161	inet_csk(sk)->icsk_ack.pending \|= ICSK_ACK_SCHED;
	162	}
	163
	164	static inline int inet_csk_ack_scheduled(const struct sock *sk)
	165	{
	166	return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
	167	}
	168
	169	static inline void inet_csk_delack_init(struct sock *sk)
	170	{
	171	memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
	172	}
	173
	174	extern void inet_csk_delete_keepalive_timer(struct sock *sk);
	175	extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);
	176
	177	#ifdef INET_CSK_DEBUG
	178	extern const char inet_csk_timer_bug_msg[];
	179	#endif
	180
	181	static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
	182	{
	183	struct inet_connection_sock *icsk = inet_csk(sk);
	184
	185	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	186	icsk->icsk_pending = 0;
	187	#ifdef INET_CSK_CLEAR_TIMERS
	188	sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
	189	#endif
	190	} else if (what == ICSK_TIME_DACK) {
	191	icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
	192	#ifdef INET_CSK_CLEAR_TIMERS
	193	sk_stop_timer(sk, &icsk->icsk_delack_timer);
	194	#endif
	195	}
	196	#ifdef INET_CSK_DEBUG
	197	else {
d8971fcb	198	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	199	}
	200	#endif
	201	}
	202
	203	/*
	204	* Reset the retransmission timer
	205	*/
	206	static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
	207	unsigned long when,
	208	const unsigned long max_when)
	209	{
	210	struct inet_connection_sock *icsk = inet_csk(sk);
	211
	212	if (when > max_when) {
	213	#ifdef INET_CSK_DEBUG
	214	pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
	215	sk, what, when, current_text_addr());
	216	#endif
	217	when = max_when;
	218	}
	219
	220	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	221	icsk->icsk_pending = what;
	222	icsk->icsk_timeout = jiffies + when;
	223	sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
	224	} else if (what == ICSK_TIME_DACK) {
	225	icsk->icsk_ack.pending \|= ICSK_ACK_TIMER;
	226	icsk->icsk_ack.timeout = jiffies + when;
	227	sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
	228	}
	229	#ifdef INET_CSK_DEBUG
	230	else {
d8971fcb	231	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	232	}
	233	#endif
	234	}
	235
	236	extern struct sock inet_csk_accept(struct sock sk, int flags, int *err);
	237
463c84b9 ACM	238	extern struct request_sock inet_csk_search_req(const struct sock sk,
	239	struct request_sock ***prevp,
	240	const __u16 rport,
	241	const __u32 raddr,
	242	const __u32 laddr);
971af18b ACM	243	extern int inet_csk_bind_conflict(const struct sock *sk,
971af18b ACM	244	const struct inet_bind_bucket *tb);
463c84b9	245	extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
971af18b ACM	246	struct sock *sk, unsigned short snum,
	247	int (bind_conflict)(const struct sock sk,
	248	const struct inet_bind_bucket *tb));
463c84b9 ACM	249
	250	extern struct dst_entry* inet_csk_route_req(struct sock *sk,
	251	const struct request_sock *req);
	252
3f421baa ACM	253	static inline void inet_csk_reqsk_queue_add(struct sock *sk,
	254	struct request_sock *req,
	255	struct sock *child)
	256	{
	257	reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child);
	258	}
	259
	260	extern void inet_csk_reqsk_queue_hash_add(struct sock *sk,
	261	struct request_sock *req,
c2977c22	262	unsigned long timeout);
3f421baa ACM	263
	264	static inline void inet_csk_reqsk_queue_removed(struct sock *sk,
	265	struct request_sock *req)
	266	{
	267	if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0)
	268	inet_csk_delete_keepalive_timer(sk);
	269	}
	270
	271	static inline void inet_csk_reqsk_queue_added(struct sock *sk,
	272	const unsigned long timeout)
	273	{
	274	if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0)
	275	inet_csk_reset_keepalive_timer(sk, timeout);
	276	}
	277
	278	static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
	279	{
	280	return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
	281	}
	282
	283	static inline int inet_csk_reqsk_queue_young(const struct sock *sk)
	284	{
	285	return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue);
	286	}
	287
	288	static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
	289	{
	290	return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
	291	}
	292
	293	static inline void inet_csk_reqsk_queue_unlink(struct sock *sk,
	294	struct request_sock *req,
	295	struct request_sock **prev)
	296	{
	297	reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev);
	298	}
	299
	300	static inline void inet_csk_reqsk_queue_drop(struct sock *sk,
	301	struct request_sock *req,
	302	struct request_sock **prev)
	303	{
	304	inet_csk_reqsk_queue_unlink(sk, req, prev);
	305	inet_csk_reqsk_queue_removed(sk, req);
	306	reqsk_free(req);
	307	}
	308
a019d6fe ACM	309	extern void inet_csk_reqsk_queue_prune(struct sock *parent,
	310	const unsigned long interval,
	311	const unsigned long timeout,
	312	const unsigned long max_rto);
	313
	314	extern void inet_csk_destroy_sock(struct sock *sk);
dc40c7bc ACM	315
	316	/*
	317	* LISTEN is a special case for poll..
	318	*/
	319	static inline unsigned int inet_csk_listen_poll(const struct sock *sk)
	320	{
	321	return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?
	322	(POLLIN \| POLLRDNORM) : 0;
	323	}
	324
a019d6fe	325	extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries);
295f7324 ACM	326	extern void inet_csk_listen_stop(struct sock *sk);
295f7324 ACM	327
af05dc93 ACM	328	extern void inet_csk_addr2sockaddr(struct sock sk, struct sockaddr uaddr);
af05dc93 ACM	329
c4d93909 ACM	330	extern int inet_csk_ctl_sock_create(struct socket **sock,
	331	unsigned short family,
	332	unsigned short type,
	333	unsigned char protocol);
463c84b9	334	#endif /* _INET_CONNECTION_SOCK_H */