/* SPDX-License-Identifier: GPL-2.0-or-later *//* 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. * * Please send any bug reports or fixes you make to the * email address(es): * lksctp developers <linux-sctp@vger.kernel.org> * * Written or modified by: * 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> */ #ifndef __net_sctp_command_h__#define __net_sctp_command_h__ #include <net/sctp/constants.h>#include <net/sctp/structs.h> enum sctp_verb { 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_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_PEER_NO_AUTH, /* generate and send authentication 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_PURGE_ASCONF_QUEUE, /* Purge all asconf queues.*/ SCTP_CMD_SET_ASOC, /* Restore association context */ SCTP_CMD_LAST}; /* How many commands can you put in an struct sctp_cmd_seq? * 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 20 union sctp_arg { void *zero_all; /* Set to NULL to clear the entire union */ __s32 i32; __u32 u32; __be32 be32; __u16 u16; __u8 u8; int error; __be16 err; enum sctp_state state; enum sctp_event_timeout to; struct sctp_chunk *chunk; struct sctp_association *asoc; struct sctp_transport *transport; struct sctp_bind_addr *bp; struct sctp_init_chunk *init; struct sctp_ulpevent *ulpevent; struct sctp_packet *packet; struct sctp_sackhdr *sackh; struct sctp_datamsg *msg;}; /* 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 * union sctp_arg. It does this by inserting the sole argument into * the ELT union element of a local union sctp_arg. * * E.g., SCTP_ARG_CONSTRUCTOR(I32, __s32, i32) builds SCTP_I32(arg), * which takes an __s32 and returns a union sctp_arg containing the * __s32. So, after foo = SCTP_I32(arg), foo.i32 == arg. */ #define SCTP_ARG_CONSTRUCTOR(name, type, elt) \static inline union sctp_arg \SCTP_## name (type arg) \{ union sctp_arg retval;\ retval.zero_all = NULL;\ 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, enum sctp_state, state)SCTP_ARG_CONSTRUCTOR(TO, enum sctp_event_timeout, to)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, struct sctp_init_chunk *, init)SCTP_ARG_CONSTRUCTOR(ULPEVENT, struct sctp_ulpevent *, ulpevent)SCTP_ARG_CONSTRUCTOR(PACKET, struct sctp_packet *, packet)SCTP_ARG_CONSTRUCTOR(SACKH, struct sctp_sackhdr *, sackh)SCTP_ARG_CONSTRUCTOR(DATAMSG, struct sctp_datamsg *, msg) static inline union sctp_arg SCTP_FORCE(void){ return SCTP_I32(1);} static inline union sctp_arg SCTP_NOFORCE(void){ return SCTP_I32(0);} static inline union sctp_arg SCTP_NULL(void){ union sctp_arg retval; retval.zero_all = NULL; return retval;} struct sctp_cmd { union sctp_arg obj; enum sctp_verb verb;}; struct sctp_cmd_seq { struct sctp_cmd cmds[SCTP_MAX_NUM_COMMANDS]; struct sctp_cmd *last_used_slot; struct sctp_cmd *next_cmd;}; /* Initialize a block of memory as a command sequence. * Return 0 if the initialization fails. */static inline int sctp_init_cmd_seq(struct sctp_cmd_seq *seq){ /* cmds[] is filled backwards to simplify the overflow BUG() check */ seq->last_used_slot = seq->cmds + SCTP_MAX_NUM_COMMANDS; seq->next_cmd = seq->last_used_slot; return 1; /* We always succeed. */} /* Add a command to an struct sctp_cmd_seq. * * Use the SCTP_* constructors defined by SCTP_ARG_CONSTRUCTOR() above * to wrap data which goes in the obj argument. */static inline void sctp_add_cmd_sf(struct sctp_cmd_seq *seq, enum sctp_verb verb, union sctp_arg obj){ struct sctp_cmd *cmd = seq->last_used_slot - 1; BUG_ON(cmd < seq->cmds); cmd->verb = verb; cmd->obj = obj; seq->last_used_slot = cmd;} /* Return the next command structure in an sctp_cmd_seq. * Return NULL at the end of the sequence. */static inline struct sctp_cmd *sctp_next_cmd(struct sctp_cmd_seq *seq){ if (seq->next_cmd <= seq->last_used_slot) return NULL; return --seq->next_cmd;} #endif /* __net_sctp_command_h__ */
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* 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.
*
* Please send any bug reports or fixes you make to the
* email address(es):
* lksctp developers <linux-sctp@vger.kernel.org>
*
* Written or modified by:
* 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>
*/
#ifndef __net_sctp_command_h__
#define __net_sctp_command_h__
#include <net/sctp/constants.h>
#include <net/sctp/structs.h>
enum sctp_verb {
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_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_PEER_NO_AUTH, /* generate and send authentication 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_PURGE_ASCONF_QUEUE, /* Purge all asconf queues.*/
SCTP_CMD_SET_ASOC, /* Restore association context */
SCTP_CMD_LAST
};
/* How many commands can you put in an struct sctp_cmd_seq?
* 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 20
union sctp_arg {
void *zero_all; /* Set to NULL to clear the entire union */
__s32 i32;
__u32 u32;
__be32 be32;
__u16 u16;
__u8 u8;
int error;
__be16 err;
enum sctp_state state;
enum sctp_event_timeout to;
struct sctp_chunk *chunk;
struct sctp_association *asoc;
struct sctp_transport *transport;
struct sctp_bind_addr *bp;
struct sctp_init_chunk *init;
struct sctp_ulpevent *ulpevent;
struct sctp_packet *packet;
struct sctp_sackhdr *sackh;
struct sctp_datamsg *msg;
};
/* 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
* union sctp_arg. It does this by inserting the sole argument into
* the ELT union element of a local union sctp_arg.
*
* E.g., SCTP_ARG_CONSTRUCTOR(I32, __s32, i32) builds SCTP_I32(arg),
* which takes an __s32 and returns a union sctp_arg containing the
* __s32. So, after foo = SCTP_I32(arg), foo.i32 == arg.
*/
#define SCTP_ARG_CONSTRUCTOR(name, type, elt) \
static inline union sctp_arg \
SCTP_## name (type arg) \
{ union sctp_arg retval;\
retval.zero_all = NULL;\
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, enum sctp_state, state)
SCTP_ARG_CONSTRUCTOR(TO, enum sctp_event_timeout, to)
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, struct sctp_init_chunk *, init)
SCTP_ARG_CONSTRUCTOR(ULPEVENT, struct sctp_ulpevent *, ulpevent)
SCTP_ARG_CONSTRUCTOR(PACKET, struct sctp_packet *, packet)
SCTP_ARG_CONSTRUCTOR(SACKH, struct sctp_sackhdr *, sackh)
SCTP_ARG_CONSTRUCTOR(DATAMSG, struct sctp_datamsg *, msg)
static inline union sctp_arg SCTP_FORCE(void)
{
return SCTP_I32(1);
}
static inline union sctp_arg SCTP_NOFORCE(void)
{
return SCTP_I32(0);
}
static inline union sctp_arg SCTP_NULL(void)
{
union sctp_arg retval;
retval.zero_all = NULL;
return retval;
}
struct sctp_cmd {
union sctp_arg obj;
enum sctp_verb verb;
};
struct sctp_cmd_seq {
struct sctp_cmd cmds[SCTP_MAX_NUM_COMMANDS];
struct sctp_cmd *last_used_slot;
struct sctp_cmd *next_cmd;
};
/* Initialize a block of memory as a command sequence.
* Return 0 if the initialization fails.
*/
static inline int sctp_init_cmd_seq(struct sctp_cmd_seq *seq)
{
/* cmds[] is filled backwards to simplify the overflow BUG() check */
seq->last_used_slot = seq->cmds + SCTP_MAX_NUM_COMMANDS;
seq->next_cmd = seq->last_used_slot;
return 1; /* We always succeed. */
}
/* Add a command to an struct sctp_cmd_seq.
*
* Use the SCTP_* constructors defined by SCTP_ARG_CONSTRUCTOR() above
* to wrap data which goes in the obj argument.
*/
static inline void sctp_add_cmd_sf(struct sctp_cmd_seq *seq,
enum sctp_verb verb, union sctp_arg obj)
{
struct sctp_cmd *cmd = seq->last_used_slot - 1;
BUG_ON(cmd < seq->cmds);
cmd->verb = verb;
cmd->obj = obj;
seq->last_used_slot = cmd;
}
/* Return the next command structure in an sctp_cmd_seq.
* Return NULL at the end of the sequence.
*/
static inline struct sctp_cmd *sctp_next_cmd(struct sctp_cmd_seq *seq)
{
if (seq->next_cmd <= seq->last_used_slot)
return NULL;
return --seq->next_cmd;
}
#endif /* __net_sctp_command_h__ */