[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 <linux/poll.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;
	u16	    sockaddr_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 *);
};

/** 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,
	ICSK_ACK_PUSHED2 = 8
};

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 __be16 rport,
						const __be32 raddr,
						const __be32 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);

extern int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
				      char __user *optval, int __user *optlen);
extern int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
				      char __user *optval, int optlen);
#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>
bd01f843	21	#include <linux/poll.h>
14c85021 ACM	22
14c85021 ACM	23	#include <net/inet_sock.h>
463c84b9 ACM	24	#include <net/request_sock.h>
463c84b9 ACM	25
3f421baa ACM	26	#define INET_CSK_DEBUG 1
	27
	28	/* Cancel timers, when they are not required. */
	29	#undef INET_CSK_CLEAR_TIMERS
	30
463c84b9 ACM	31	struct inet_bind_bucket;
463c84b9 ACM	32	struct inet_hashinfo;
6687e988	33	struct tcp_congestion_ops;
463c84b9	34
8292a17a ACM	35	/*
	36	* Pointers to address related TCP functions
	37	* (i.e. things that depend on the address family)
	38	*/
	39	struct inet_connection_sock_af_ops {
e89862f4	40	int (queue_xmit)(struct sk_buff skb, int ipfragok);
8292a17a ACM	41	void (send_check)(struct sock sk, int len,
	42	struct sk_buff *skb);
	43	int (rebuild_header)(struct sock sk);
	44	int (conn_request)(struct sock sk, struct sk_buff *skb);
	45	struct sock (syn_recv_sock)(struct sock sk, struct sk_buff skb,
	46	struct request_sock *req,
	47	struct dst_entry *dst);
	48	int (remember_stamp)(struct sock sk);
850db6b8 ACM	49	u16 net_header_len;
850db6b8 ACM	50	u16 sockaddr_len;
8292a17a ACM	51	int (setsockopt)(struct sock sk, int level, int optname,
	52	char __user *optval, int optlen);
	53	int (getsockopt)(struct sock sk, int level, int optname,
	54	char __user optval, int __user optlen);
3fdadf7d DM	55	int (compat_setsockopt)(struct sock sk,
	56	int level, int optname,
	57	char __user *optval, int optlen);
	58	int (compat_getsockopt)(struct sock sk,
	59	int level, int optname,
	60	char __user optval, int __user optlen);
8292a17a	61	void (addr2sockaddr)(struct sock sk, struct sockaddr *);
8292a17a ACM	62	};
8292a17a ACM	63
463c84b9 ACM	64	/** inet_connection_sock - INET connection oriented sock
	65	*
	66	* @icsk_accept_queue: FIFO of established children
	67	* @icsk_bind_hash: Bind node
	68	* @icsk_timeout: Timeout
	69	* @icsk_retransmit_timer: Resend (no ack)
	70	* @icsk_rto: Retransmit timeout
d83d8461	71	* @icsk_pmtu_cookie Last pmtu seen by socket
6687e988	72	* @icsk_ca_ops Pluggable congestion control hook
8292a17a	73	* @icsk_af_ops Operations which are AF_INET{4,6} specific
6687e988	74	* @icsk_ca_state: Congestion control state
463c84b9 ACM	75	* @icsk_retransmits: Number of unrecovered [RTO] timeouts
	76	* @icsk_pending: Scheduled timer event
	77	* @icsk_backoff: Backoff
	78	* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
6687e988	79	* @icsk_probes_out: unanswered 0 window probes
d83d8461	80	* @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options)
463c84b9	81	* @icsk_ack: Delayed ACK control data
5d424d5a	82	* @icsk_mtup; MTU probing control data
463c84b9 ACM	83	*/
	84	struct inet_connection_sock {
	85	/* inet_sock has to be the first member! */
	86	struct inet_sock icsk_inet;
	87	struct request_sock_queue icsk_accept_queue;
	88	struct inet_bind_bucket *icsk_bind_hash;
	89	unsigned long icsk_timeout;
	90	struct timer_list icsk_retransmit_timer;
	91	struct timer_list icsk_delack_timer;
	92	__u32 icsk_rto;
d83d8461	93	__u32 icsk_pmtu_cookie;
770cfbcf SH	94	const struct tcp_congestion_ops *icsk_ca_ops;
770cfbcf SH	95	const struct inet_connection_sock_af_ops *icsk_af_ops;
d83d8461	96	unsigned int (icsk_sync_mss)(struct sock sk, u32 pmtu);
6687e988	97	__u8 icsk_ca_state;
463c84b9 ACM	98	__u8 icsk_retransmits;
	99	__u8 icsk_pending;
	100	__u8 icsk_backoff;
	101	__u8 icsk_syn_retries;
6687e988	102	__u8 icsk_probes_out;
d83d8461	103	__u16 icsk_ext_hdr_len;
463c84b9 ACM	104	struct {
	105	__u8 pending; /* ACK is pending */
	106	__u8 quick; /* Scheduled number of quick acks */
	107	__u8 pingpong; /* The session is interactive */
	108	__u8 blocked; /* Delayed ACK was blocked by socket lock */
	109	__u32 ato; /* Predicted tick of soft clock */
	110	unsigned long timeout; /* Currently scheduled timeout */
	111	__u32 lrcvtime; /* timestamp of last received data packet */
	112	__u16 last_seg_size; /* Size of last incoming segment */
	113	__u16 rcv_mss; /* MSS used for delayed ACK decisions */
	114	} icsk_ack;
5d424d5a JH	115	struct {
	116	int enabled;
	117
	118	/* Range of MTUs to search */
	119	int search_high;
	120	int search_low;
	121
	122	/* Information on the current probe. */
	123	int probe_size;
5d424d5a	124	} icsk_mtup;
6687e988 ACM	125	u32 icsk_ca_priv[16];
6687e988 ACM	126	#define ICSK_CA_PRIV_SIZE (16 * sizeof(u32))
463c84b9 ACM	127	};
463c84b9 ACM	128
3f421baa ACM	129	#define ICSK_TIME_RETRANS 1 /* Retransmit timer */
	130	#define ICSK_TIME_DACK 2 /* Delayed ack timer */
	131	#define ICSK_TIME_PROBE0 3 /* Zero window probe timer */
	132	#define ICSK_TIME_KEEPOPEN 4 /* Keepalive timer */
	133
463c84b9 ACM	134	static inline struct inet_connection_sock inet_csk(const struct sock sk)
	135	{
	136	return (struct inet_connection_sock *)sk;
	137	}
	138
6687e988 ACM	139	static inline void inet_csk_ca(const struct sock sk)
	140	{
	141	return (void *)inet_csk(sk)->icsk_ca_priv;
	142	}
	143
9f1d2604 ACM	144	extern struct sock inet_csk_clone(struct sock sk,
9f1d2604 ACM	145	const struct request_sock *req,
dd0fc66f	146	const gfp_t priority);
9f1d2604	147
3f421baa ACM	148	enum inet_csk_ack_state_t {
	149	ICSK_ACK_SCHED = 1,
	150	ICSK_ACK_TIMER = 2,
1ef9696c AK	151	ICSK_ACK_PUSHED = 4,
1ef9696c AK	152	ICSK_ACK_PUSHED2 = 8
3f421baa ACM	153	};
3f421baa ACM	154
463c84b9 ACM	155	extern void inet_csk_init_xmit_timers(struct sock *sk,
	156	void (*retransmit_handler)(unsigned long),
	157	void (*delack_handler)(unsigned long),
	158	void (*keepalive_handler)(unsigned long));
	159	extern void inet_csk_clear_xmit_timers(struct sock *sk);
	160
3f421baa ACM	161	static inline void inet_csk_schedule_ack(struct sock *sk)
	162	{
	163	inet_csk(sk)->icsk_ack.pending \|= ICSK_ACK_SCHED;
	164	}
	165
	166	static inline int inet_csk_ack_scheduled(const struct sock *sk)
	167	{
	168	return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
	169	}
	170
	171	static inline void inet_csk_delack_init(struct sock *sk)
	172	{
	173	memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
	174	}
	175
	176	extern void inet_csk_delete_keepalive_timer(struct sock *sk);
	177	extern void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);
	178
	179	#ifdef INET_CSK_DEBUG
	180	extern const char inet_csk_timer_bug_msg[];
	181	#endif
	182
	183	static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
	184	{
	185	struct inet_connection_sock *icsk = inet_csk(sk);
	186
	187	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	188	icsk->icsk_pending = 0;
	189	#ifdef INET_CSK_CLEAR_TIMERS
	190	sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
	191	#endif
	192	} else if (what == ICSK_TIME_DACK) {
	193	icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
	194	#ifdef INET_CSK_CLEAR_TIMERS
	195	sk_stop_timer(sk, &icsk->icsk_delack_timer);
	196	#endif
	197	}
	198	#ifdef INET_CSK_DEBUG
	199	else {
d8971fcb	200	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	201	}
	202	#endif
	203	}
	204
	205	/*
	206	* Reset the retransmission timer
	207	*/
	208	static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
	209	unsigned long when,
	210	const unsigned long max_when)
	211	{
	212	struct inet_connection_sock *icsk = inet_csk(sk);
	213
	214	if (when > max_when) {
	215	#ifdef INET_CSK_DEBUG
	216	pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
	217	sk, what, when, current_text_addr());
	218	#endif
	219	when = max_when;
	220	}
	221
	222	if (what == ICSK_TIME_RETRANS \|\| what == ICSK_TIME_PROBE0) {
	223	icsk->icsk_pending = what;
	224	icsk->icsk_timeout = jiffies + when;
	225	sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
	226	} else if (what == ICSK_TIME_DACK) {
	227	icsk->icsk_ack.pending \|= ICSK_ACK_TIMER;
	228	icsk->icsk_ack.timeout = jiffies + when;
	229	sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
	230	}
	231	#ifdef INET_CSK_DEBUG
	232	else {
d8971fcb	233	pr_debug("%s", inet_csk_timer_bug_msg);
3f421baa ACM	234	}
	235	#endif
	236	}
	237
	238	extern struct sock inet_csk_accept(struct sock sk, int flags, int *err);
	239
463c84b9 ACM	240	extern struct request_sock inet_csk_search_req(const struct sock sk,
463c84b9 ACM	241	struct request_sock ***prevp,
6b72977b	242	const __be16 rport,
7f25afbb AV	243	const __be32 raddr,
7f25afbb AV	244	const __be32 laddr);
971af18b ACM	245	extern int inet_csk_bind_conflict(const struct sock *sk,
971af18b ACM	246	const struct inet_bind_bucket *tb);
463c84b9	247	extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
971af18b ACM	248	struct sock *sk, unsigned short snum,
	249	int (bind_conflict)(const struct sock sk,
	250	const struct inet_bind_bucket *tb));
463c84b9 ACM	251
	252	extern struct dst_entry* inet_csk_route_req(struct sock *sk,
	253	const struct request_sock *req);
	254
3f421baa ACM	255	static inline void inet_csk_reqsk_queue_add(struct sock *sk,
	256	struct request_sock *req,
	257	struct sock *child)
	258	{
	259	reqsk_queue_add(&inet_csk(sk)->icsk_accept_queue, req, sk, child);
	260	}
	261
	262	extern void inet_csk_reqsk_queue_hash_add(struct sock *sk,
	263	struct request_sock *req,
c2977c22	264	unsigned long timeout);
3f421baa ACM	265
	266	static inline void inet_csk_reqsk_queue_removed(struct sock *sk,
	267	struct request_sock *req)
	268	{
	269	if (reqsk_queue_removed(&inet_csk(sk)->icsk_accept_queue, req) == 0)
	270	inet_csk_delete_keepalive_timer(sk);
	271	}
	272
	273	static inline void inet_csk_reqsk_queue_added(struct sock *sk,
	274	const unsigned long timeout)
	275	{
	276	if (reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue) == 0)
	277	inet_csk_reset_keepalive_timer(sk, timeout);
	278	}
	279
	280	static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
	281	{
	282	return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
	283	}
	284
	285	static inline int inet_csk_reqsk_queue_young(const struct sock *sk)
	286	{
	287	return reqsk_queue_len_young(&inet_csk(sk)->icsk_accept_queue);
	288	}
	289
	290	static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
	291	{
	292	return reqsk_queue_is_full(&inet_csk(sk)->icsk_accept_queue);
	293	}
	294
	295	static inline void inet_csk_reqsk_queue_unlink(struct sock *sk,
	296	struct request_sock *req,
	297	struct request_sock **prev)
	298	{
	299	reqsk_queue_unlink(&inet_csk(sk)->icsk_accept_queue, req, prev);
	300	}
	301
	302	static inline void inet_csk_reqsk_queue_drop(struct sock *sk,
	303	struct request_sock *req,
	304	struct request_sock **prev)
	305	{
	306	inet_csk_reqsk_queue_unlink(sk, req, prev);
	307	inet_csk_reqsk_queue_removed(sk, req);
	308	reqsk_free(req);
	309	}
	310
a019d6fe ACM	311	extern void inet_csk_reqsk_queue_prune(struct sock *parent,
	312	const unsigned long interval,
	313	const unsigned long timeout,
	314	const unsigned long max_rto);
	315
	316	extern void inet_csk_destroy_sock(struct sock *sk);
dc40c7bc ACM	317
	318	/*
	319	* LISTEN is a special case for poll..
	320	*/
	321	static inline unsigned int inet_csk_listen_poll(const struct sock *sk)
	322	{
	323	return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?
	324	(POLLIN \| POLLRDNORM) : 0;
	325	}
	326
a019d6fe	327	extern int inet_csk_listen_start(struct sock *sk, const int nr_table_entries);
295f7324 ACM	328	extern void inet_csk_listen_stop(struct sock *sk);
295f7324 ACM	329
af05dc93 ACM	330	extern void inet_csk_addr2sockaddr(struct sock sk, struct sockaddr uaddr);
af05dc93 ACM	331
c4d93909 ACM	332	extern int inet_csk_ctl_sock_create(struct socket **sock,
	333	unsigned short family,
	334	unsigned short type,
	335	unsigned char protocol);
dec73ff0 ACM	336
	337	extern int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
	338	char __user optval, int __user optlen);
	339	extern int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
	340	char __user *optval, int optlen);
463c84b9	341	#endif /* _INET_CONNECTION_SOCK_H */