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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
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tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/net/sctp/command.h
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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diff --git a/include/net/sctp/command.h b/include/net/sctp/command.h
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+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (C) 1999-2001 Cisco, Motorola
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * These are the definitions needed for the command object.
+ *
+ * The SCTP reference 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.
+ *
+ * the SCTP reference 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_COUNTER_RESET, /* Reset a counter. */
+ SCTP_CMD_COUNTER_INC, /* Increment a counter. */
+ SCTP_CMD_INIT_RESTART, /* High level, do init 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_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;
+ __u16 u16;
+ __u8 u8;
+ int error;
+ sctp_state_t state;
+ sctp_event_timeout_t to;
+ sctp_counter_t counter;
+ 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; retval.i32 = 0; return retval;
+}
+static inline sctp_arg_t SCTP_FORCE(void)
+{
+ sctp_arg_t retval; 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; retval.elt = arg; return retval; }
+
+SCTP_ARG_CONSTRUCTOR(I32, __s32, i32)
+SCTP_ARG_CONSTRUCTOR(U32, __u32, u32)
+SCTP_ARG_CONSTRUCTOR(U16, __u16, u16)
+SCTP_ARG_CONSTRUCTOR(U8, __u8, u8)
+SCTP_ARG_CONSTRUCTOR(ERROR, int, error)
+SCTP_ARG_CONSTRUCTOR(STATE, sctp_state_t, state)
+SCTP_ARG_CONSTRUCTOR(COUNTER, sctp_counter_t, counter)
+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.
+ * Return 0 if the command sequence is full.
+ *
+ * Use the SCTP_* constructors defined by SCTP_ARG_CONSTRUCTOR() above
+ * to wrap data which goes in the obj argument.
+ */
+int sctp_add_cmd(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__ */
+