[linux.git] / net / dccp / ccid.h

#ifndef _CCID_H
#define _CCID_H
/*
 *  net/dccp/ccid.h
 *
 *  An implementation of the DCCP protocol
 *  Arnaldo Carvalho de Melo <[email protected]>
 *
 *  CCID infrastructure
 *
 *	This program is free software; you can redistribute it and/or modify it
 *	under the terms of the GNU General Public License version 2 as
 *	published by the Free Software Foundation.
 */

#include <net/sock.h>
#include <linux/compiler.h>
#include <linux/dccp.h>
#include <linux/list.h>
#include <linux/module.h>

/* maximum value for a CCID (RFC 4340, 19.5) */
#define CCID_MAX		255
#define CCID_SLAB_NAME_LENGTH	32

struct tcp_info;

/**
 *  struct ccid_operations  -  Interface to Congestion-Control Infrastructure
 *
 *  @ccid_id: numerical CCID ID (up to %CCID_MAX, cf. table 5 in RFC 4340, 10.)
 *  @ccid_ccmps: the CCMPS including network/transport headers (0 when disabled)
 *  @ccid_name: alphabetical identifier string for @ccid_id
 *  @ccid_hc_{r,t}x_slab: memory pool for the receiver/sender half-connection
 *  @ccid_hc_{r,t}x_obj_size: size of the receiver/sender half-connection socket
 *
 *  @ccid_hc_{r,t}x_init: CCID-specific initialisation routine (before startup)
 *  @ccid_hc_{r,t}x_exit: CCID-specific cleanup routine (before destruction)
 *  @ccid_hc_rx_packet_recv: implements the HC-receiver side
 *  @ccid_hc_{r,t}x_parse_options: parsing routine for CCID/HC-specific options
 *  @ccid_hc_{r,t}x_insert_options: insert routine for CCID/HC-specific options
 *  @ccid_hc_tx_packet_recv: implements feedback processing for the HC-sender
 *  @ccid_hc_tx_send_packet: implements the sending part of the HC-sender
 *  @ccid_hc_tx_packet_sent: does accounting for packets in flight by HC-sender
 *  @ccid_hc_{r,t}x_get_info: INET_DIAG information for HC-receiver/sender
 *  @ccid_hc_{r,t}x_getsockopt: socket options specific to HC-receiver/sender
 */
struct ccid_operations {
	unsigned char		ccid_id;
	__u32			ccid_ccmps;
	const char		*ccid_name;
	struct kmem_cache	*ccid_hc_rx_slab,
				*ccid_hc_tx_slab;
	char			ccid_hc_rx_slab_name[CCID_SLAB_NAME_LENGTH];
	char			ccid_hc_tx_slab_name[CCID_SLAB_NAME_LENGTH];
	__u32			ccid_hc_rx_obj_size,
				ccid_hc_tx_obj_size;
	/* Interface Routines */
	int		(*ccid_hc_rx_init)(struct ccid *ccid, struct sock *sk);
	int		(*ccid_hc_tx_init)(struct ccid *ccid, struct sock *sk);
	void		(*ccid_hc_rx_exit)(struct sock *sk);
	void		(*ccid_hc_tx_exit)(struct sock *sk);
	void		(*ccid_hc_rx_packet_recv)(struct sock *sk,
						  struct sk_buff *skb);
	int		(*ccid_hc_rx_parse_options)(struct sock *sk, u8 pkt,
						    u8 opt, u8 *val, u8 len);
	int		(*ccid_hc_rx_insert_options)(struct sock *sk,
						     struct sk_buff *skb);
	void		(*ccid_hc_tx_packet_recv)(struct sock *sk,
						  struct sk_buff *skb);
	int		(*ccid_hc_tx_parse_options)(struct sock *sk, u8 pkt,
						    u8 opt, u8 *val, u8 len);
	int		(*ccid_hc_tx_send_packet)(struct sock *sk,
						  struct sk_buff *skb);
	void		(*ccid_hc_tx_packet_sent)(struct sock *sk,
						  unsigned int len);
	void		(*ccid_hc_rx_get_info)(struct sock *sk,
					       struct tcp_info *info);
	void		(*ccid_hc_tx_get_info)(struct sock *sk,
					       struct tcp_info *info);
	int		(*ccid_hc_rx_getsockopt)(struct sock *sk,
						 const int optname, int len,
						 u32 __user *optval,
						 int __user *optlen);
	int		(*ccid_hc_tx_getsockopt)(struct sock *sk,
						 const int optname, int len,
						 u32 __user *optval,
						 int __user *optlen);
};

extern struct ccid_operations ccid2_ops;
#ifdef CONFIG_IP_DCCP_CCID3
extern struct ccid_operations ccid3_ops;
#endif

int ccid_initialize_builtins(void);
void ccid_cleanup_builtins(void);

struct ccid {
	struct ccid_operations *ccid_ops;
	char		       ccid_priv[0];
};

static inline void *ccid_priv(const struct ccid *ccid)
{
	return (void *)ccid->ccid_priv;
}

bool ccid_support_check(u8 const *ccid_array, u8 array_len);
int ccid_get_builtin_ccids(u8 **ccid_array, u8 *array_len);
int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
				  char __user *, int __user *);

struct ccid *ccid_new(const u8 id, struct sock *sk, bool rx);

static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
{
	struct ccid *ccid = dp->dccps_hc_rx_ccid;

	if (ccid == NULL || ccid->ccid_ops == NULL)
		return -1;
	return ccid->ccid_ops->ccid_id;
}

static inline int ccid_get_current_tx_ccid(struct dccp_sock *dp)
{
	struct ccid *ccid = dp->dccps_hc_tx_ccid;

	if (ccid == NULL || ccid->ccid_ops == NULL)
		return -1;
	return ccid->ccid_ops->ccid_id;
}

void ccid_hc_rx_delete(struct ccid *ccid, struct sock *sk);
void ccid_hc_tx_delete(struct ccid *ccid, struct sock *sk);

/*
 * Congestion control of queued data packets via CCID decision.
 *
 * The TX CCID performs its congestion-control by indicating whether and when a
 * queued packet may be sent, using the return code of ccid_hc_tx_send_packet().
 * The following modes are supported via the symbolic constants below:
 * - timer-based pacing    (CCID returns a delay value in milliseconds);
 * - autonomous dequeueing (CCID internally schedules dccps_xmitlet).
 */

enum ccid_dequeueing_decision {
	CCID_PACKET_SEND_AT_ONCE =	 0x00000,  /* "green light": no delay */
	CCID_PACKET_DELAY_MAX =		 0x0FFFF,  /* maximum delay in msecs  */
	CCID_PACKET_DELAY =		 0x10000,  /* CCID msec-delay mode */
	CCID_PACKET_WILL_DEQUEUE_LATER = 0x20000,  /* CCID autonomous mode */
	CCID_PACKET_ERR =		 0xF0000,  /* error condition */
};

static inline int ccid_packet_dequeue_eval(const int return_code)
{
	if (return_code < 0)
		return CCID_PACKET_ERR;
	if (return_code == 0)
		return CCID_PACKET_SEND_AT_ONCE;
	if (return_code <= CCID_PACKET_DELAY_MAX)
		return CCID_PACKET_DELAY;
	return return_code;
}

static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
					 struct sk_buff *skb)
{
	if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
		return ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb);
	return CCID_PACKET_SEND_AT_ONCE;
}

static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
					  unsigned int len)
{
	if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
		ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, len);
}

static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
					  struct sk_buff *skb)
{
	if (ccid->ccid_ops->ccid_hc_rx_packet_recv != NULL)
		ccid->ccid_ops->ccid_hc_rx_packet_recv(sk, skb);
}

static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
					  struct sk_buff *skb)
{
	if (ccid->ccid_ops->ccid_hc_tx_packet_recv != NULL)
		ccid->ccid_ops->ccid_hc_tx_packet_recv(sk, skb);
}

/**
 * ccid_hc_tx_parse_options  -  Parse CCID-specific options sent by the receiver
 * @pkt: type of packet that @opt appears on (RFC 4340, 5.1)
 * @opt: the CCID-specific option type (RFC 4340, 5.8 and 10.3)
 * @val: value of @opt
 * @len: length of @val in bytes
 */
static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
					   u8 pkt, u8 opt, u8 *val, u8 len)
{
	if (ccid->ccid_ops->ccid_hc_tx_parse_options == NULL)
		return 0;
	return ccid->ccid_ops->ccid_hc_tx_parse_options(sk, pkt, opt, val, len);
}

/**
 * ccid_hc_rx_parse_options  -  Parse CCID-specific options sent by the sender
 * Arguments are analogous to ccid_hc_tx_parse_options()
 */
static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
					   u8 pkt, u8 opt, u8 *val, u8 len)
{
	if (ccid->ccid_ops->ccid_hc_rx_parse_options == NULL)
		return 0;
	return ccid->ccid_ops->ccid_hc_rx_parse_options(sk, pkt, opt, val, len);
}

static inline int ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
					    struct sk_buff *skb)
{
	if (ccid->ccid_ops->ccid_hc_rx_insert_options != NULL)
		return ccid->ccid_ops->ccid_hc_rx_insert_options(sk, skb);
	return 0;
}

static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
				       struct tcp_info *info)
{
	if (ccid->ccid_ops->ccid_hc_rx_get_info != NULL)
		ccid->ccid_ops->ccid_hc_rx_get_info(sk, info);
}

static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
				       struct tcp_info *info)
{
	if (ccid->ccid_ops->ccid_hc_tx_get_info != NULL)
		ccid->ccid_ops->ccid_hc_tx_get_info(sk, info);
}

static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
					const int optname, int len,
					u32 __user *optval, int __user *optlen)
{
	int rc = -ENOPROTOOPT;
	if (ccid != NULL && ccid->ccid_ops->ccid_hc_rx_getsockopt != NULL)
		rc = ccid->ccid_ops->ccid_hc_rx_getsockopt(sk, optname, len,
						 optval, optlen);
	return rc;
}

static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
					const int optname, int len,
					u32 __user *optval, int __user *optlen)
{
	int rc = -ENOPROTOOPT;
	if (ccid != NULL && ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
		rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
						 optval, optlen);
	return rc;
}
#endif /* _CCID_H */
Commit	Line	Data
7c657876 ACM	1	#ifndef _CCID_H
	2	#define _CCID_H
	3	/*
	4	* net/dccp/ccid.h
	5	*
	6	* An implementation of the DCCP protocol
	7	* Arnaldo Carvalho de Melo <[email protected]>
	8	*
	9	* CCID infrastructure
	10	*
	11	* This program is free software; you can redistribute it and/or modify it
	12	* under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*/
	15
	16	#include <net/sock.h>
88f964db	17	#include <linux/compiler.h>
7c657876 ACM	18	#include <linux/dccp.h>
	19	#include <linux/list.h>
	20	#include <linux/module.h>
	21
8ed030dd GR	22	/* maximum value for a CCID (RFC 4340, 19.5) */
	23	#define CCID_MAX 255
	24	#define CCID_SLAB_NAME_LENGTH 32
7c657876	25
14c85021 ACM	26	struct tcp_info;
14c85021 ACM	27
9cb2345a GR	28	/**
	29	* struct ccid_operations - Interface to Congestion-Control Infrastructure
	30	*
	31	* @ccid_id: numerical CCID ID (up to %CCID_MAX, cf. table 5 in RFC 4340, 10.)
6179983a	32	* @ccid_ccmps: the CCMPS including network/transport headers (0 when disabled)
9cb2345a	33	* @ccid_name: alphabetical identifier string for @ccid_id
9cb2345a GR	34	* @ccid_hc_{r,t}x_slab: memory pool for the receiver/sender half-connection
	35	* @ccid_hc_{r,t}x_obj_size: size of the receiver/sender half-connection socket
	36	*
	37	* @ccid_hc_{r,t}x_init: CCID-specific initialisation routine (before startup)
	38	* @ccid_hc_{r,t}x_exit: CCID-specific cleanup routine (before destruction)
	39	* @ccid_hc_rx_packet_recv: implements the HC-receiver side
	40	* @ccid_hc_{r,t}x_parse_options: parsing routine for CCID/HC-specific options
	41	* @ccid_hc_{r,t}x_insert_options: insert routine for CCID/HC-specific options
	42	* @ccid_hc_tx_packet_recv: implements feedback processing for the HC-sender
	43	* @ccid_hc_tx_send_packet: implements the sending part of the HC-sender
	44	* @ccid_hc_tx_packet_sent: does accounting for packets in flight by HC-sender
	45	* @ccid_hc_{r,t}x_get_info: INET_DIAG information for HC-receiver/sender
	46	* @ccid_hc_{r,t}x_getsockopt: socket options specific to HC-receiver/sender
	47	*/
91f0ebf7	48	struct ccid_operations {
9cb2345a	49	unsigned char ccid_id;
6179983a	50	__u32 ccid_ccmps;
9cb2345a	51	const char *ccid_name;
9cb2345a GR	52	struct kmem_cache *ccid_hc_rx_slab,
9cb2345a GR	53	*ccid_hc_tx_slab;
8ed030dd GR	54	char ccid_hc_rx_slab_name[CCID_SLAB_NAME_LENGTH];
8ed030dd GR	55	char ccid_hc_tx_slab_name[CCID_SLAB_NAME_LENGTH];
9cb2345a GR	56	__u32 ccid_hc_rx_obj_size,
	57	ccid_hc_tx_obj_size;
	58	/* Interface Routines */
91f0ebf7 ACM	59	int (ccid_hc_rx_init)(struct ccid ccid, struct sock *sk);
91f0ebf7 ACM	60	int (ccid_hc_tx_init)(struct ccid ccid, struct sock *sk);
7c657876 ACM	61	void (ccid_hc_rx_exit)(struct sock sk);
7c657876 ACM	62	void (ccid_hc_tx_exit)(struct sock sk);
7690af3f ACM	63	void (ccid_hc_rx_packet_recv)(struct sock sk,
7690af3f ACM	64	struct sk_buff *skb);
4874c131 GR	65	int (ccid_hc_rx_parse_options)(struct sock sk, u8 pkt,
4874c131 GR	66	u8 opt, u8 *val, u8 len);
2d0817d1	67	int (ccid_hc_rx_insert_options)(struct sock sk,
7690af3f	68	struct sk_buff *skb);
7690af3f ACM	69	void (ccid_hc_tx_packet_recv)(struct sock sk,
7690af3f ACM	70	struct sk_buff *skb);
4874c131 GR	71	int (ccid_hc_tx_parse_options)(struct sock sk, u8 pkt,
4874c131 GR	72	u8 opt, u8 *val, u8 len);
7c657876	73	int (ccid_hc_tx_send_packet)(struct sock sk,
6b57c93d GR	74	struct sk_buff *skb);
6b57c93d GR	75	void (ccid_hc_tx_packet_sent)(struct sock sk,
baf9e782	76	unsigned int len);
2babe1f6 ACM	77	void (ccid_hc_rx_get_info)(struct sock sk,
	78	struct tcp_info *info);
	79	void (ccid_hc_tx_get_info)(struct sock sk,
	80	struct tcp_info *info);
88f964db ACM	81	int (ccid_hc_rx_getsockopt)(struct sock sk,
	82	const int optname, int len,
	83	u32 __user *optval,
	84	int __user *optlen);
	85	int (ccid_hc_tx_getsockopt)(struct sock sk,
	86	const int optname, int len,
	87	u32 __user *optval,
	88	int __user *optlen);
7c657876 ACM	89	};
7c657876 ACM	90
ddebc973 GR	91	extern struct ccid_operations ccid2_ops;
	92	#ifdef CONFIG_IP_DCCP_CCID3
	93	extern struct ccid_operations ccid3_ops;
	94	#endif
	95
a402a5aa JP	96	int ccid_initialize_builtins(void);
a402a5aa JP	97	void ccid_cleanup_builtins(void);
7c657876	98
91f0ebf7 ACM	99	struct ccid {
	100	struct ccid_operations *ccid_ops;
	101	char ccid_priv[0];
	102	};
7c657876	103
91f0ebf7	104	static inline void ccid_priv(const struct ccid ccid)
7c657876	105	{
91f0ebf7	106	return (void *)ccid->ccid_priv;
7c657876 ACM	107	}
7c657876 ACM	108
a402a5aa JP	109	bool ccid_support_check(u8 const *ccid_array, u8 array_len);
	110	int ccid_get_builtin_ccids(u8 *ccid_array, u8 array_len);
	111	int ccid_getsockopt_builtin_ccids(struct sock *sk, int len,
	112	char __user , int __user );
d90ebcbf	113
a402a5aa	114	struct ccid ccid_new(const u8 id, struct sock sk, bool rx);
91f0ebf7	115
71c262a3 GR	116	static inline int ccid_get_current_rx_ccid(struct dccp_sock *dp)
	117	{
	118	struct ccid *ccid = dp->dccps_hc_rx_ccid;
	119
	120	if (ccid == NULL \|\| ccid->ccid_ops == NULL)
	121	return -1;
	122	return ccid->ccid_ops->ccid_id;
	123	}
	124
	125	static inline int ccid_get_current_tx_ccid(struct dccp_sock *dp)
	126	{
	127	struct ccid *ccid = dp->dccps_hc_tx_ccid;
	128
	129	if (ccid == NULL \|\| ccid->ccid_ops == NULL)
	130	return -1;
	131	return ccid->ccid_ops->ccid_id;
	132	}
	133
a402a5aa JP	134	void ccid_hc_rx_delete(struct ccid ccid, struct sock sk);
a402a5aa JP	135	void ccid_hc_tx_delete(struct ccid ccid, struct sock sk);
91f0ebf7	136
fe84f414 GR	137	/*
	138	* Congestion control of queued data packets via CCID decision.
	139	*
	140	* The TX CCID performs its congestion-control by indicating whether and when a
	141	* queued packet may be sent, using the return code of ccid_hc_tx_send_packet().
	142	* The following modes are supported via the symbolic constants below:
	143	* - timer-based pacing (CCID returns a delay value in milliseconds);
	144	* - autonomous dequeueing (CCID internally schedules dccps_xmitlet).
	145	*/
	146
	147	enum ccid_dequeueing_decision {
	148	CCID_PACKET_SEND_AT_ONCE = 0x00000, /* "green light": no delay */
	149	CCID_PACKET_DELAY_MAX = 0x0FFFF, /* maximum delay in msecs */
	150	CCID_PACKET_DELAY = 0x10000, /* CCID msec-delay mode */
	151	CCID_PACKET_WILL_DEQUEUE_LATER = 0x20000, /* CCID autonomous mode */
	152	CCID_PACKET_ERR = 0xF0000, /* error condition */
	153	};
	154
	155	static inline int ccid_packet_dequeue_eval(const int return_code)
	156	{
	157	if (return_code < 0)
	158	return CCID_PACKET_ERR;
	159	if (return_code == 0)
	160	return CCID_PACKET_SEND_AT_ONCE;
	161	if (return_code <= CCID_PACKET_DELAY_MAX)
	162	return CCID_PACKET_DELAY;
	163	return return_code;
	164	}
	165
7c657876	166	static inline int ccid_hc_tx_send_packet(struct ccid ccid, struct sock sk,
6b57c93d	167	struct sk_buff *skb)
7c657876	168	{
91f0ebf7	169	if (ccid->ccid_ops->ccid_hc_tx_send_packet != NULL)
fe84f414 GR	170	return ccid->ccid_ops->ccid_hc_tx_send_packet(sk, skb);
fe84f414 GR	171	return CCID_PACKET_SEND_AT_ONCE;
7c657876 ACM	172	}
	173
	174	static inline void ccid_hc_tx_packet_sent(struct ccid ccid, struct sock sk,
baf9e782	175	unsigned int len)
7c657876	176	{
91f0ebf7	177	if (ccid->ccid_ops->ccid_hc_tx_packet_sent != NULL)
baf9e782	178	ccid->ccid_ops->ccid_hc_tx_packet_sent(sk, len);
7c657876 ACM	179	}
	180
	181	static inline void ccid_hc_rx_packet_recv(struct ccid ccid, struct sock sk,
	182	struct sk_buff *skb)
	183	{
91f0ebf7 ACM	184	if (ccid->ccid_ops->ccid_hc_rx_packet_recv != NULL)
91f0ebf7 ACM	185	ccid->ccid_ops->ccid_hc_rx_packet_recv(sk, skb);
7c657876 ACM	186	}
	187
	188	static inline void ccid_hc_tx_packet_recv(struct ccid ccid, struct sock sk,
	189	struct sk_buff *skb)
	190	{
91f0ebf7 ACM	191	if (ccid->ccid_ops->ccid_hc_tx_packet_recv != NULL)
91f0ebf7 ACM	192	ccid->ccid_ops->ccid_hc_tx_packet_recv(sk, skb);
7c657876 ACM	193	}
7c657876 ACM	194
4874c131 GR	195	/**
	196	* ccid_hc_tx_parse_options - Parse CCID-specific options sent by the receiver
	197	* @pkt: type of packet that @opt appears on (RFC 4340, 5.1)
	198	* @opt: the CCID-specific option type (RFC 4340, 5.8 and 10.3)
	199	* @val: value of @opt
	200	* @len: length of @val in bytes
	201	*/
7c657876	202	static inline int ccid_hc_tx_parse_options(struct ccid ccid, struct sock sk,
4874c131	203	u8 pkt, u8 opt, u8 *val, u8 len)
7c657876	204	{
4874c131 GR	205	if (ccid->ccid_ops->ccid_hc_tx_parse_options == NULL)
	206	return 0;
	207	return ccid->ccid_ops->ccid_hc_tx_parse_options(sk, pkt, opt, val, len);
7c657876 ACM	208	}
7c657876 ACM	209
4874c131 GR	210	/**
	211	* ccid_hc_rx_parse_options - Parse CCID-specific options sent by the sender
	212	* Arguments are analogous to ccid_hc_tx_parse_options()
	213	*/
7c657876	214	static inline int ccid_hc_rx_parse_options(struct ccid ccid, struct sock sk,
4874c131	215	u8 pkt, u8 opt, u8 *val, u8 len)
7c657876	216	{
4874c131 GR	217	if (ccid->ccid_ops->ccid_hc_rx_parse_options == NULL)
	218	return 0;
	219	return ccid->ccid_ops->ccid_hc_rx_parse_options(sk, pkt, opt, val, len);
7c657876 ACM	220	}
7c657876 ACM	221
2d0817d1 ACM	222	static inline int ccid_hc_rx_insert_options(struct ccid ccid, struct sock sk,
2d0817d1 ACM	223	struct sk_buff *skb)
7c657876	224	{
91f0ebf7	225	if (ccid->ccid_ops->ccid_hc_rx_insert_options != NULL)
2d0817d1 ACM	226	return ccid->ccid_ops->ccid_hc_rx_insert_options(sk, skb);
2d0817d1 ACM	227	return 0;
7c657876	228	}
2babe1f6 ACM	229
	230	static inline void ccid_hc_rx_get_info(struct ccid ccid, struct sock sk,
	231	struct tcp_info *info)
	232	{
91f0ebf7 ACM	233	if (ccid->ccid_ops->ccid_hc_rx_get_info != NULL)
91f0ebf7 ACM	234	ccid->ccid_ops->ccid_hc_rx_get_info(sk, info);
2babe1f6 ACM	235	}
	236
	237	static inline void ccid_hc_tx_get_info(struct ccid ccid, struct sock sk,
	238	struct tcp_info *info)
	239	{
91f0ebf7 ACM	240	if (ccid->ccid_ops->ccid_hc_tx_get_info != NULL)
91f0ebf7 ACM	241	ccid->ccid_ops->ccid_hc_tx_get_info(sk, info);
2babe1f6	242	}
88f964db ACM	243
	244	static inline int ccid_hc_rx_getsockopt(struct ccid ccid, struct sock sk,
	245	const int optname, int len,
	246	u32 __user optval, int __user optlen)
	247	{
	248	int rc = -ENOPROTOOPT;
276bdb82	249	if (ccid != NULL && ccid->ccid_ops->ccid_hc_rx_getsockopt != NULL)
91f0ebf7	250	rc = ccid->ccid_ops->ccid_hc_rx_getsockopt(sk, optname, len,
88f964db ACM	251	optval, optlen);
	252	return rc;
	253	}
	254
	255	static inline int ccid_hc_tx_getsockopt(struct ccid ccid, struct sock sk,
	256	const int optname, int len,
	257	u32 __user optval, int __user optlen)
	258	{
	259	int rc = -ENOPROTOOPT;
276bdb82	260	if (ccid != NULL && ccid->ccid_ops->ccid_hc_tx_getsockopt != NULL)
91f0ebf7	261	rc = ccid->ccid_ops->ccid_hc_tx_getsockopt(sk, optname, len,
88f964db ACM	262	optval, optlen);
	263	return rc;
	264	}
7c657876	265	#endif /* _CCID_H */