[mirror_ubuntu-eoan-kernel.git] / include / net / sctp / command.h

/* SCTP kernel Implementation
 * (C) Copyright IBM Corp. 2001, 2004
 * Copyright (C) 1999-2001 Cisco, Motorola
 *
 * This file is part of the SCTP kernel implementation
 *
 * These are the definitions needed for the command object.
 *
 * This SCTP implementation  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, or (at your option)
 * any later version.
 *
 * This SCTP implementation  is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to one of the
 * following email addresses:
 *
 * La Monte H.P. Yarroll <piggy@acm.org>
 * Karl Knutson <karl@athena.chicago.il.us>
 * Ardelle Fan <ardelle.fan@intel.com>
 * Sridhar Samudrala <sri@us.ibm.com>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */


#ifndef __net_sctp_command_h__
#define __net_sctp_command_h__

#include <net/sctp/constants.h>
#include <net/sctp/structs.h>


typedef enum {
	SCTP_CMD_NOP = 0,	/* Do nothing. */
	SCTP_CMD_NEW_ASOC,	/* Register a new association.  */
	SCTP_CMD_DELETE_TCB,	/* Delete the current association. */
	SCTP_CMD_NEW_STATE,	/* Enter a new state.  */
	SCTP_CMD_REPORT_TSN,	/* Record the arrival of a TSN.  */
	SCTP_CMD_GEN_SACK,	/* Send a Selective ACK (maybe).  */
	SCTP_CMD_PROCESS_SACK,	/* Process an inbound SACK.  */
	SCTP_CMD_GEN_INIT_ACK,	/* Generate an INIT ACK chunk.  */
	SCTP_CMD_PEER_INIT,	/* Process a INIT from the peer.  */
	SCTP_CMD_GEN_COOKIE_ECHO, /* Generate a COOKIE ECHO chunk. */
	SCTP_CMD_CHUNK_ULP,	/* Send a chunk to the sockets layer.  */
	SCTP_CMD_EVENT_ULP,	/* Send a notification to the sockets layer. */
	SCTP_CMD_REPLY,		/* Send a chunk to our peer.  */
	SCTP_CMD_SEND_PKT,	/* Send a full packet to our peer.  */
	SCTP_CMD_RETRAN,	/* Mark a transport for retransmission.  */
	SCTP_CMD_ECN_CE,        /* Do delayed CE processing.   */
	SCTP_CMD_ECN_ECNE,	/* Do delayed ECNE processing. */
	SCTP_CMD_ECN_CWR,	/* Do delayed CWR processing.  */
	SCTP_CMD_TIMER_START,	/* Start a timer.  */
	SCTP_CMD_TIMER_START_ONCE, /* Start a timer once */
	SCTP_CMD_TIMER_RESTART,	/* Restart a timer. */
	SCTP_CMD_TIMER_STOP,	/* Stop a timer. */
	SCTP_CMD_INIT_CHOOSE_TRANSPORT, /* Choose transport for an INIT. */
	SCTP_CMD_INIT_COUNTER_RESET, /* Reset init counter. */
	SCTP_CMD_INIT_COUNTER_INC,   /* Increment init counter. */
	SCTP_CMD_INIT_RESTART,  /* High level, do init timer work. */
	SCTP_CMD_COOKIEECHO_RESTART,  /* High level, do cookie-echo timer work. */
	SCTP_CMD_INIT_FAILED,   /* High level, do init failure work. */
	SCTP_CMD_REPORT_DUP,	/* Report a duplicate TSN.  */
	SCTP_CMD_STRIKE,	/* Mark a strike against a transport.  */
	SCTP_CMD_HB_TIMERS_START,    /* Start the heartbeat timers. */
	SCTP_CMD_HB_TIMER_UPDATE,    /* Update a heartbeat timers.  */
	SCTP_CMD_HB_TIMERS_STOP,     /* Stop the heartbeat timers.  */
	SCTP_CMD_TRANSPORT_HB_SENT,  /* Reset the status of a transport. */
	SCTP_CMD_TRANSPORT_IDLE,     /* Do manipulations on idle transport */
	SCTP_CMD_TRANSPORT_ON,       /* Mark the transport as active. */
	SCTP_CMD_REPORT_ERROR,   /* Pass this error back out of the sm. */
	SCTP_CMD_REPORT_BAD_TAG, /* Verification tags didn't match. */
	SCTP_CMD_PROCESS_CTSN,   /* Sideeffect from shutdown. */
	SCTP_CMD_ASSOC_FAILED,	 /* Handle association failure. */
	SCTP_CMD_DISCARD_PACKET, /* Discard the whole packet. */
	SCTP_CMD_GEN_SHUTDOWN,   /* Generate a SHUTDOWN chunk. */
	SCTP_CMD_UPDATE_ASSOC,   /* Update association information. */
	SCTP_CMD_PURGE_OUTQUEUE, /* Purge all data waiting to be sent. */
	SCTP_CMD_SETUP_T2,       /* Hi-level, setup T2-shutdown parms.  */
	SCTP_CMD_RTO_PENDING,	 /* Set transport's rto_pending. */
	SCTP_CMD_PART_DELIVER,	 /* Partial data delivery considerations. */
	SCTP_CMD_RENEGE,         /* Renege data on an association. */
	SCTP_CMD_SETUP_T4,	 /* ADDIP, setup T4 RTO timer parms. */
	SCTP_CMD_PROCESS_OPERR,  /* Process an ERROR chunk. */
	SCTP_CMD_REPORT_FWDTSN,	 /* Report new cumulative TSN Ack. */
	SCTP_CMD_PROCESS_FWDTSN, /* Skips were reported, so process further. */
	SCTP_CMD_CLEAR_INIT_TAG, /* Clears association peer's inittag. */
	SCTP_CMD_DEL_NON_PRIMARY, /* Removes non-primary peer transports. */
	SCTP_CMD_T3_RTX_TIMERS_STOP, /* Stops T3-rtx pending timers */
	SCTP_CMD_FORCE_PRIM_RETRAN,  /* Forces retrans. over primary path. */
	SCTP_CMD_SET_SK_ERR,	 /* Set sk_err */
	SCTP_CMD_ASSOC_CHANGE,	 /* generate and send assoc_change event */
	SCTP_CMD_ADAPTATION_IND, /* generate and send adaptation event */
	SCTP_CMD_ASSOC_SHKEY,    /* generate the association shared keys */
	SCTP_CMD_T1_RETRAN,	 /* Mark for retransmission after T1 timeout  */
	SCTP_CMD_UPDATE_INITTAG, /* Update peer inittag */
	SCTP_CMD_SEND_MSG,	 /* Send the whole use message */
	SCTP_CMD_SEND_NEXT_ASCONF, /* Send the next ASCONF after ACK */
	SCTP_CMD_PURGE_ASCONF_QUEUE, /* Purge all asconf queues.*/
	SCTP_CMD_LAST
} sctp_verb_t;

/* How many commands can you put in an sctp_cmd_seq_t?
 * This is a rather arbitrary number, ideally derived from a careful
 * analysis of the state functions, but in reality just taken from
 * thin air in the hopes othat we don't trigger a kernel panic.
 */
#define SCTP_MAX_NUM_COMMANDS 14

typedef union {
	__s32 i32;
	__u32 u32;
	__be32 be32;
	__u16 u16;
	__u8 u8;
	int error;
	__be16 err;
	sctp_state_t state;
	sctp_event_timeout_t to;
	unsigned long zero;
	void *ptr;
	struct sctp_chunk *chunk;
	struct sctp_association *asoc;
	struct sctp_transport *transport;
	struct sctp_bind_addr *bp;
	sctp_init_chunk_t *init;
	struct sctp_ulpevent *ulpevent;
	struct sctp_packet *packet;
	sctp_sackhdr_t *sackh;
	struct sctp_datamsg *msg;
} sctp_arg_t;

/* We are simulating ML type constructors here.
 *
 * SCTP_ARG_CONSTRUCTOR(NAME, TYPE, ELT) builds a function called
 * SCTP_NAME() which takes an argument of type TYPE and returns an
 * sctp_arg_t.  It does this by inserting the sole argument into the
 * ELT union element of a local sctp_arg_t.
 *
 * E.g., SCTP_ARG_CONSTRUCTOR(I32, __s32, i32) builds SCTP_I32(arg),
 * which takes an __s32 and returns a sctp_arg_t containing the
 * __s32.  So, after foo = SCTP_I32(arg), foo.i32 == arg.
 */
static inline sctp_arg_t SCTP_NULL(void)
{
	sctp_arg_t retval; retval.ptr = NULL; return retval;
}
static inline sctp_arg_t SCTP_NOFORCE(void)
{
	sctp_arg_t retval = {.zero = 0UL}; retval.i32 = 0; return retval;
}
static inline sctp_arg_t SCTP_FORCE(void)
{
	sctp_arg_t retval = {.zero = 0UL}; retval.i32 = 1; return retval;
}

#define SCTP_ARG_CONSTRUCTOR(name, type, elt) \
static inline sctp_arg_t	\
SCTP_## name (type arg)		\
{ sctp_arg_t retval = {.zero = 0UL}; retval.elt = arg; return retval; }

SCTP_ARG_CONSTRUCTOR(I32,	__s32, i32)
SCTP_ARG_CONSTRUCTOR(U32,	__u32, u32)
SCTP_ARG_CONSTRUCTOR(BE32,	__be32, be32)
SCTP_ARG_CONSTRUCTOR(U16,	__u16, u16)
SCTP_ARG_CONSTRUCTOR(U8,	__u8, u8)
SCTP_ARG_CONSTRUCTOR(ERROR,     int, error)
SCTP_ARG_CONSTRUCTOR(PERR,      __be16, err)	/* protocol error */
SCTP_ARG_CONSTRUCTOR(STATE,	sctp_state_t, state)
SCTP_ARG_CONSTRUCTOR(TO,	sctp_event_timeout_t, to)
SCTP_ARG_CONSTRUCTOR(PTR,	void *, ptr)
SCTP_ARG_CONSTRUCTOR(CHUNK,	struct sctp_chunk *, chunk)
SCTP_ARG_CONSTRUCTOR(ASOC,	struct sctp_association *, asoc)
SCTP_ARG_CONSTRUCTOR(TRANSPORT,	struct sctp_transport *, transport)
SCTP_ARG_CONSTRUCTOR(BA,	struct sctp_bind_addr *, bp)
SCTP_ARG_CONSTRUCTOR(PEER_INIT,	sctp_init_chunk_t *, init)
SCTP_ARG_CONSTRUCTOR(ULPEVENT,  struct sctp_ulpevent *, ulpevent)
SCTP_ARG_CONSTRUCTOR(PACKET,	struct sctp_packet *, packet)
SCTP_ARG_CONSTRUCTOR(SACKH,	sctp_sackhdr_t *, sackh)
SCTP_ARG_CONSTRUCTOR(DATAMSG,	struct sctp_datamsg *, msg)

typedef struct {
	sctp_arg_t obj;
	sctp_verb_t verb;
} sctp_cmd_t;

typedef struct {
	sctp_cmd_t cmds[SCTP_MAX_NUM_COMMANDS];
	__u8 next_free_slot;
	__u8 next_cmd;
} sctp_cmd_seq_t;


/* Initialize a block of memory as a command sequence.
 * Return 0 if the initialization fails.
 */
int sctp_init_cmd_seq(sctp_cmd_seq_t *seq);

/* Add a command to an sctp_cmd_seq_t.
 *
 * Use the SCTP_* constructors defined by SCTP_ARG_CONSTRUCTOR() above
 * to wrap data which goes in the obj argument.
 */
void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj);

/* Return the next command structure in an sctp_cmd_seq.
 * Return NULL at the end of the sequence.
 */
sctp_cmd_t *sctp_next_cmd(sctp_cmd_seq_t *seq);

#endif /* __net_sctp_command_h__ */
Commit	Line	Data
60c778b2	1	/* SCTP kernel Implementation
1da177e4 LT	2	* (C) Copyright IBM Corp. 2001, 2004
	3	* Copyright (C) 1999-2001 Cisco, Motorola
	4	*
60c778b2	5	* This file is part of the SCTP kernel implementation
1da177e4 LT	6	*
	7	* These are the definitions needed for the command object.
	8	*
60c778b2	9	* This SCTP implementation is free software;
1da177e4 LT	10	* you can redistribute it and/or modify it under the terms of
	11	* the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2, or (at your option)
	13	* any later version.
	14	*
60c778b2	15	* This SCTP implementation is distributed in the hope that it
1da177e4 LT	16	* will be useful, but WITHOUT ANY WARRANTY; without even the implied
	17	* ************************
	18	* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	19	* See the GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with GNU CC; see the file COPYING. If not, write to
	23	* the Free Software Foundation, 59 Temple Place - Suite 330,
	24	* Boston, MA 02111-1307, USA.
	25	*
	26	* Please send any bug reports or fixes you make to one of the
	27	* following email addresses:
	28	*
	29	* La Monte H.P. Yarroll <piggy@acm.org>
	30	* Karl Knutson <karl@athena.chicago.il.us>
	31	* Ardelle Fan <ardelle.fan@intel.com>
	32	* Sridhar Samudrala <sri@us.ibm.com>
	33	*
	34	* Any bugs reported given to us we will try to fix... any fixes shared will
	35	* be incorporated into the next SCTP release.
	36	*/
	37
	38
	39	#ifndef __net_sctp_command_h__
	40	#define __net_sctp_command_h__
	41
	42	#include <net/sctp/constants.h>
	43	#include <net/sctp/structs.h>
	44
	45
	46	typedef enum {
	47	SCTP_CMD_NOP = 0, /* Do nothing. */
	48	SCTP_CMD_NEW_ASOC, /* Register a new association. */
	49	SCTP_CMD_DELETE_TCB, /* Delete the current association. */
	50	SCTP_CMD_NEW_STATE, /* Enter a new state. */
	51	SCTP_CMD_REPORT_TSN, /* Record the arrival of a TSN. */
	52	SCTP_CMD_GEN_SACK, /* Send a Selective ACK (maybe). */
	53	SCTP_CMD_PROCESS_SACK, /* Process an inbound SACK. */
	54	SCTP_CMD_GEN_INIT_ACK, /* Generate an INIT ACK chunk. */
	55	SCTP_CMD_PEER_INIT, /* Process a INIT from the peer. */
	56	SCTP_CMD_GEN_COOKIE_ECHO, /* Generate a COOKIE ECHO chunk. */
	57	SCTP_CMD_CHUNK_ULP, /* Send a chunk to the sockets layer. */
	58	SCTP_CMD_EVENT_ULP, /* Send a notification to the sockets layer. */
	59	SCTP_CMD_REPLY, /* Send a chunk to our peer. */
	60	SCTP_CMD_SEND_PKT, /* Send a full packet to our peer. */
	61	SCTP_CMD_RETRAN, /* Mark a transport for retransmission. */
	62	SCTP_CMD_ECN_CE, /* Do delayed CE processing. */
	63	SCTP_CMD_ECN_ECNE, /* Do delayed ECNE processing. */
	64	SCTP_CMD_ECN_CWR, /* Do delayed CWR processing. */
	65	SCTP_CMD_TIMER_START, /* Start a timer. */
f8d96052	66	SCTP_CMD_TIMER_START_ONCE, /* Start a timer once */
1da177e4 LT	67	SCTP_CMD_TIMER_RESTART, /* Restart a timer. */
1da177e4 LT	68	SCTP_CMD_TIMER_STOP, /* Stop a timer. */
3f7a87d2 FF	69	SCTP_CMD_INIT_CHOOSE_TRANSPORT, /* Choose transport for an INIT. */
	70	SCTP_CMD_INIT_COUNTER_RESET, /* Reset init counter. */
	71	SCTP_CMD_INIT_COUNTER_INC, /* Increment init counter. */
1da177e4	72	SCTP_CMD_INIT_RESTART, /* High level, do init timer work. */
3f7a87d2	73	SCTP_CMD_COOKIEECHO_RESTART, /* High level, do cookie-echo timer work. */
1da177e4 LT	74	SCTP_CMD_INIT_FAILED, /* High level, do init failure work. */
	75	SCTP_CMD_REPORT_DUP, /* Report a duplicate TSN. */
	76	SCTP_CMD_STRIKE, /* Mark a strike against a transport. */
1da177e4 LT	77	SCTP_CMD_HB_TIMERS_START, /* Start the heartbeat timers. */
	78	SCTP_CMD_HB_TIMER_UPDATE, /* Update a heartbeat timers. */
	79	SCTP_CMD_HB_TIMERS_STOP, /* Stop the heartbeat timers. */
7e99013a VY	80	SCTP_CMD_TRANSPORT_HB_SENT, /* Reset the status of a transport. */
7e99013a VY	81	SCTP_CMD_TRANSPORT_IDLE, /* Do manipulations on idle transport */
1da177e4 LT	82	SCTP_CMD_TRANSPORT_ON, /* Mark the transport as active. */
	83	SCTP_CMD_REPORT_ERROR, /* Pass this error back out of the sm. */
	84	SCTP_CMD_REPORT_BAD_TAG, /* Verification tags didn't match. */
	85	SCTP_CMD_PROCESS_CTSN, /* Sideeffect from shutdown. */
	86	SCTP_CMD_ASSOC_FAILED, /* Handle association failure. */
	87	SCTP_CMD_DISCARD_PACKET, /* Discard the whole packet. */
	88	SCTP_CMD_GEN_SHUTDOWN, /* Generate a SHUTDOWN chunk. */
	89	SCTP_CMD_UPDATE_ASSOC, /* Update association information. */
	90	SCTP_CMD_PURGE_OUTQUEUE, /* Purge all data waiting to be sent. */
	91	SCTP_CMD_SETUP_T2, /* Hi-level, setup T2-shutdown parms. */
	92	SCTP_CMD_RTO_PENDING, /* Set transport's rto_pending. */
	93	SCTP_CMD_PART_DELIVER, /* Partial data delivery considerations. */
	94	SCTP_CMD_RENEGE, /* Renege data on an association. */
	95	SCTP_CMD_SETUP_T4, /* ADDIP, setup T4 RTO timer parms. */
	96	SCTP_CMD_PROCESS_OPERR, /* Process an ERROR chunk. */
	97	SCTP_CMD_REPORT_FWDTSN, /* Report new cumulative TSN Ack. */
	98	SCTP_CMD_PROCESS_FWDTSN, /* Skips were reported, so process further. */
	99	SCTP_CMD_CLEAR_INIT_TAG, /* Clears association peer's inittag. */
	100	SCTP_CMD_DEL_NON_PRIMARY, /* Removes non-primary peer transports. */
	101	SCTP_CMD_T3_RTX_TIMERS_STOP, /* Stops T3-rtx pending timers */
	102	SCTP_CMD_FORCE_PRIM_RETRAN, /* Forces retrans. over primary path. */
8de8c873	103	SCTP_CMD_SET_SK_ERR, /* Set sk_err */
07d93967 VY	104	SCTP_CMD_ASSOC_CHANGE, /* generate and send assoc_change event */
07d93967 VY	105	SCTP_CMD_ADAPTATION_IND, /* generate and send adaptation event */
730fc3d0	106	SCTP_CMD_ASSOC_SHKEY, /* generate the association shared keys */
b6157d8e	107	SCTP_CMD_T1_RETRAN, /* Mark for retransmission after T1 timeout */
f4ad85ca	108	SCTP_CMD_UPDATE_INITTAG, /* Update peer inittag */
9c5c62be	109	SCTP_CMD_SEND_MSG, /* Send the whole use message */
c0786693	110	SCTP_CMD_SEND_NEXT_ASCONF, /* Send the next ASCONF after ACK */
a000c01e	111	SCTP_CMD_PURGE_ASCONF_QUEUE, /* Purge all asconf queues.*/
1da177e4 LT	112	SCTP_CMD_LAST
	113	} sctp_verb_t;
	114
1da177e4 LT	115	/* How many commands can you put in an sctp_cmd_seq_t?
	116	* This is a rather arbitrary number, ideally derived from a careful
	117	* analysis of the state functions, but in reality just taken from
	118	* thin air in the hopes othat we don't trigger a kernel panic.
	119	*/
	120	#define SCTP_MAX_NUM_COMMANDS 14
	121
	122	typedef union {
	123	__s32 i32;
	124	__u32 u32;
2178eda8	125	__be32 be32;
1da177e4 LT	126	__u16 u16;
	127	__u8 u8;
	128	int error;
dc251b2b	129	__be16 err;
1da177e4 LT	130	sctp_state_t state;
1da177e4 LT	131	sctp_event_timeout_t to;
19c7e9ee	132	unsigned long zero;
1da177e4 LT	133	void *ptr;
	134	struct sctp_chunk *chunk;
	135	struct sctp_association *asoc;
	136	struct sctp_transport *transport;
	137	struct sctp_bind_addr *bp;
	138	sctp_init_chunk_t *init;
	139	struct sctp_ulpevent *ulpevent;
	140	struct sctp_packet *packet;
	141	sctp_sackhdr_t *sackh;
9c5c62be	142	struct sctp_datamsg *msg;
1da177e4 LT	143	} sctp_arg_t;
	144
	145	/* We are simulating ML type constructors here.
	146	*
	147	* SCTP_ARG_CONSTRUCTOR(NAME, TYPE, ELT) builds a function called
	148	* SCTP_NAME() which takes an argument of type TYPE and returns an
	149	* sctp_arg_t. It does this by inserting the sole argument into the
	150	* ELT union element of a local sctp_arg_t.
	151	*
	152	* E.g., SCTP_ARG_CONSTRUCTOR(I32, __s32, i32) builds SCTP_I32(arg),
	153	* which takes an __s32 and returns a sctp_arg_t containing the
	154	* __s32. So, after foo = SCTP_I32(arg), foo.i32 == arg.
	155	*/
	156	static inline sctp_arg_t SCTP_NULL(void)
	157	{
	158	sctp_arg_t retval; retval.ptr = NULL; return retval;
	159	}
	160	static inline sctp_arg_t SCTP_NOFORCE(void)
	161	{
19c7e9ee	162	sctp_arg_t retval = {.zero = 0UL}; retval.i32 = 0; return retval;
1da177e4 LT	163	}
	164	static inline sctp_arg_t SCTP_FORCE(void)
	165	{
19c7e9ee	166	sctp_arg_t retval = {.zero = 0UL}; retval.i32 = 1; return retval;
1da177e4 LT	167	}
	168
	169	#define SCTP_ARG_CONSTRUCTOR(name, type, elt) \
	170	static inline sctp_arg_t \
	171	SCTP_## name (type arg) \
19c7e9ee	172	{ sctp_arg_t retval = {.zero = 0UL}; retval.elt = arg; return retval; }
1da177e4 LT	173
	174	SCTP_ARG_CONSTRUCTOR(I32, __s32, i32)
	175	SCTP_ARG_CONSTRUCTOR(U32, __u32, u32)
2178eda8	176	SCTP_ARG_CONSTRUCTOR(BE32, __be32, be32)
1da177e4 LT	177	SCTP_ARG_CONSTRUCTOR(U16, __u16, u16)
	178	SCTP_ARG_CONSTRUCTOR(U8, __u8, u8)
	179	SCTP_ARG_CONSTRUCTOR(ERROR, int, error)
dc251b2b	180	SCTP_ARG_CONSTRUCTOR(PERR, __be16, err) /* protocol error */
1da177e4	181	SCTP_ARG_CONSTRUCTOR(STATE, sctp_state_t, state)
1da177e4 LT	182	SCTP_ARG_CONSTRUCTOR(TO, sctp_event_timeout_t, to)
	183	SCTP_ARG_CONSTRUCTOR(PTR, void *, ptr)
	184	SCTP_ARG_CONSTRUCTOR(CHUNK, struct sctp_chunk *, chunk)
	185	SCTP_ARG_CONSTRUCTOR(ASOC, struct sctp_association *, asoc)
	186	SCTP_ARG_CONSTRUCTOR(TRANSPORT, struct sctp_transport *, transport)
	187	SCTP_ARG_CONSTRUCTOR(BA, struct sctp_bind_addr *, bp)
	188	SCTP_ARG_CONSTRUCTOR(PEER_INIT, sctp_init_chunk_t *, init)
	189	SCTP_ARG_CONSTRUCTOR(ULPEVENT, struct sctp_ulpevent *, ulpevent)
	190	SCTP_ARG_CONSTRUCTOR(PACKET, struct sctp_packet *, packet)
	191	SCTP_ARG_CONSTRUCTOR(SACKH, sctp_sackhdr_t *, sackh)
9c5c62be	192	SCTP_ARG_CONSTRUCTOR(DATAMSG, struct sctp_datamsg *, msg)
1da177e4 LT	193
	194	typedef struct {
	195	sctp_arg_t obj;
	196	sctp_verb_t verb;
	197	} sctp_cmd_t;
	198
	199	typedef struct {
	200	sctp_cmd_t cmds[SCTP_MAX_NUM_COMMANDS];
	201	__u8 next_free_slot;
	202	__u8 next_cmd;
	203	} sctp_cmd_seq_t;
	204
	205
	206	/* Initialize a block of memory as a command sequence.
	207	* Return 0 if the initialization fails.
	208	*/
	209	int sctp_init_cmd_seq(sctp_cmd_seq_t *seq);
	210
	211	/* Add a command to an sctp_cmd_seq_t.
1da177e4 LT	212	*
	213	* Use the SCTP_* constructors defined by SCTP_ARG_CONSTRUCTOR() above
	214	* to wrap data which goes in the obj argument.
	215	*/
bc09dff1	216	void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj);
1da177e4 LT	217
	218	/* Return the next command structure in an sctp_cmd_seq.
	219	* Return NULL at the end of the sequence.
	220	*/
	221	sctp_cmd_t sctp_next_cmd(sctp_cmd_seq_t seq);
	222
	223	#endif /* __net_sctp_command_h__ */
	224