222 lines
8.6 KiB
C
222 lines
8.6 KiB
C
/* 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_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_TRANSMIT, /* Transmit the outqueue. */
|
|
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_RESET, /* Reset the status of a 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_LAST
|
|
} sctp_verb_t;
|
|
|
|
#define SCTP_CMD_MAX (SCTP_CMD_LAST - 1)
|
|
#define SCTP_CMD_NUM_VERBS (SCTP_CMD_MAX + 1)
|
|
|
|
/* 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;
|
|
} 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)
|
|
|
|
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__ */
|
|
|