FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_constants.h

     /*      $KAME: sctp_constants.h,v 1.16 2004/08/17 04:06:16 itojun Exp $ */
     /*      $DragonFly: src/sys/netinet/sctp_constants.h,v 1.3 2006/05/20 02:42:12 dillon Exp $     */
     
     #ifndef _NETINET_SCTP_CONSTANTS_H_
     #define _NETINET_SCTP_CONSTANTS_H_
     
     /*
      * Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
      * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Cisco Systems, Inc.
     * 4. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    #define SCTP_VERSION_STRING "KAME-BSD 1.1"
    /*#define SCTP_AUDITING_ENABLED 1 used for debug/auditing */
    #define SCTP_AUDIT_SIZE 256
    #define SCTP_STAT_LOG_SIZE 80000
    
    /* Places that CWND log can happen from */
    #define SCTP_CWND_LOG_FROM_FR   1
    #define SCTP_CWND_LOG_FROM_RTX  2
    #define SCTP_CWND_LOG_FROM_BRST 3
    #define SCTP_CWND_LOG_FROM_SS   4
    #define SCTP_CWND_LOG_FROM_CA   5
    #define SCTP_CWND_LOG_FROM_SAT  6
    #define SCTP_BLOCK_LOG_INTO_BLK 7
    #define SCTP_BLOCK_LOG_OUTOF_BLK 8
    #define SCTP_BLOCK_LOG_CHECK     9
    #define SCTP_STR_LOG_FROM_INTO_STRD 10
    #define SCTP_STR_LOG_FROM_IMMED_DEL 11
    #define SCTP_STR_LOG_FROM_INSERT_HD 12
    #define SCTP_STR_LOG_FROM_INSERT_MD 13
    #define SCTP_STR_LOG_FROM_INSERT_TL 14
    #define SCTP_STR_LOG_FROM_MARK_TSN  15
    #define SCTP_STR_LOG_FROM_EXPRS_DEL 16
    #define SCTP_FR_LOG_BIGGEST_TSNS    17
    #define SCTP_FR_LOG_STRIKE_TEST     18
    #define SCTP_FR_LOG_STRIKE_CHUNK    19
    #define SCTP_FR_T3_TIMEOUT          20
    #define SCTP_MAP_PREPARE_SLIDE      21
    #define SCTP_MAP_SLIDE_FROM         22
    #define SCTP_MAP_SLIDE_RESULT       23
    #define SCTP_MAP_SLIDE_CLEARED      24
    #define SCTP_MAP_SLIDE_NONE         25
    #define SCTP_FR_T3_MARK_TIME        26
    #define SCTP_FR_T3_MARKED           27
    #define SCTP_FR_T3_STOPPED          28
    #define SCTP_FR_MARKED              30
    #define SCTP_CWND_LOG_NOADV_SS      31
    #define SCTP_CWND_LOG_NOADV_CA      32
    #define SCTP_MAX_BURST_APPLIED      33
    #define SCTP_MAX_IFP_APPLIED        34
    #define SCTP_MAX_BURST_ERROR_STOP   35
    #define SCTP_INCREASE_PEER_RWND     36
    #define SCTP_DECREASE_PEER_RWND     37
    #define SCTP_SET_PEER_RWND_VIA_SACK 38
    #define SCTP_LOG_MBCNT_INCREASE     39
    #define SCTP_LOG_MBCNT_DECREASE     40
    #define SCTP_LOG_MBCNT_CHKSET       41
    /*
     * To turn on various logging, you must first define SCTP_STAT_LOGGING.
     * Then to get something to log you define one of the logging defines i.e.
     *
     * SCTP_CWND_LOGGING
     * SCTP_BLK_LOGGING
     * SCTP_STR_LOGGING
     * SCTP_FR_LOGGING
     *
     * Any one or a combination of the logging can be turned on.
     */
    #define SCTP_LOG_EVENT_CWND  1
    #define SCTP_LOG_EVENT_BLOCK 2
    #define SCTP_LOG_EVENT_STRM  3
    #define SCTP_LOG_EVENT_FR    4
    #define SCTP_LOG_EVENT_MAP   5
   #define SCTP_LOG_EVENT_MAXBURST 6
   #define SCTP_LOG_EVENT_RWND  7
   #define SCTP_LOG_EVENT_MBCNT 8
   
   
   /* number of associations by default for zone allocation */
   #define SCTP_MAX_NUM_OF_ASOC    40000
   /* how many addresses per assoc remote and local */
   #define SCTP_SCALE_FOR_ADDR     2
   
   /* default AUTO_ASCONF mode enable(1)/disable(0) value (sysctl) */
   #define SCTP_DEFAULT_AUTO_ASCONF        0
   
   /*
    * If you wish to use MD5 instead of SLA uncomment the line below.
    * Why you would like to do this:
    * a) There may be IPR on SHA-1, or so the FIP-180-1 page says,
    * b) MD5 is 3 times faster (has coded here).
    *
    * The disadvantage is it is thought that MD5 has been cracked... see RFC2104.
    */
   /*#define USE_MD5 1 */
   /*
    * Note: I can't seem to get this to compile now for some reason- the
    * kernel can't link in the md5 crypto
    */
   
   /* DEFINE HERE WHAT CRC YOU WANT TO USE */
   #define SCTP_USECRC_RFC2960  1
   /*#define SCTP_USECRC_FLETCHER 1*/
   /*#define SCTP_USECRC_SSHCRC32 1*/
   /*#define SCTP_USECRC_FASTCRC32 1*/
   /*#define SCTP_USECRC_CRC32 1*/
   /*#define SCTP_USECRC_TCP32 1*/
   /*#define SCTP_USECRC_CRC16SMAL 1*/
   /*#define SCTP_USECRC_CRC16 1 */
   /*#define SCTP_USECRC_MODADLER 1*/
   
   #ifndef SCTP_ADLER32_BASE
   #define SCTP_ADLER32_BASE 65521
   #endif
   
   #define SCTP_CWND_POSTS_LIST 256
   /*
    * the SCTP protocol signature
    * this includes the version number encoded in the last 4 bits
    * of the signature.
    */
   #define PROTO_SIGNATURE_A       0x30000000
   #define SCTP_VERSION_NUMBER     0x3
   
   #define MAX_TSN 0xffffffff
   #define MAX_SEQ 0xffff
   
   /* how many executions every N tick's */
   #define SCTP_MAX_ITERATOR_AT_ONCE 20
   
   /* number of clock ticks between iterator executions */
   #define SCTP_ITERATOR_TICKS 1
   
   /* option:
    * If you comment out the following you will receive the old
    * behavior of obeying cwnd for the fast retransmit algorithm.
    * With this defined a FR happens right away with-out waiting
    * for the flightsize to drop below the cwnd value (which is
    * reduced by the FR to 1/2 the inflight packets).
    */
   #define SCTP_IGNORE_CWND_ON_FR 1
   
   /*
    * Adds implementors guide behavior to only use newest highest
    * update in SACK gap ack's to figure out if you need to stroke
    * a chunk for FR.
    */
   #define SCTP_NO_FR_UNLESS_SEGMENT_SMALLER 1
   
   /* default max I can burst out after a fast retransmit */
   #define SCTP_DEF_MAX_BURST 8
   
   /* Packet transmit states in the sent field */
   #define SCTP_DATAGRAM_UNSENT            0
   #define SCTP_DATAGRAM_SENT              1
   #define SCTP_DATAGRAM_RESEND1           2 /* not used (in code, but may hit this value) */
   #define SCTP_DATAGRAM_RESEND2           3 /* not used (in code, but may hit this value) */
   #define SCTP_DATAGRAM_RESEND3           4 /* not used (in code, but may hit this value) */
   #define SCTP_DATAGRAM_RESEND            5
   #define SCTP_DATAGRAM_ACKED             10010
   #define SCTP_DATAGRAM_INBOUND           10011
   #define SCTP_READY_TO_TRANSMIT          10012
   #define SCTP_DATAGRAM_MARKED            20010
   #define SCTP_FORWARD_TSN_SKIP           30010
   
   /* SCTP chunk types */
   /* Moved to sctp.h so f/w and natd
    * boxes can find the chunk types.
    */
   
   /* align to 32-bit sizes */
   #define SCTP_SIZE32(x)  ((((x)+3) >> 2) << 2)
   
   #define IS_SCTP_CONTROL(a) ((a)->chunk_type != SCTP_DATA)
   #define IS_SCTP_DATA(a) ((a)->chunk_type == SCTP_DATA)
   
   /* SCTP parameter types */
   #define SCTP_HEARTBEAT_INFO         0x0001
   #define SCTP_IPV4_ADDRESS           0x0005
   #define SCTP_IPV6_ADDRESS           0x0006
   #define SCTP_STATE_COOKIE           0x0007
   #define SCTP_UNRECOG_PARAM          0x0008
   #define SCTP_COOKIE_PRESERVE        0x0009
   #define SCTP_HOSTNAME_ADDRESS       0x000b
   #define SCTP_SUPPORTED_ADDRTYPE     0x000c
   #define SCTP_ECN_CAPABLE            0x8000
   /* draft-ietf-stewart-strreset-xxx */
   #define SCTP_STR_RESET_REQUEST      0x000d
   #define SCTP_STR_RESET_RESPONSE     0x000e
   
   /* ECN Nonce: draft-ladha-sctp-ecn-nonce */
   #define SCTP_ECN_NONCE_SUPPORTED    0x8001
   /*
    * draft-ietf-stewart-strreset-xxx
    *   param=0x8001  len=0xNNNN
    *   Byte | Byte | Byte | Byte
    *   Byte | Byte ...
    *
    *  Where each Byte is a chunk type
    *  extension supported so for example
    *  to support all chunks one would have (in hex):
    *
    *  80 01 00 09
    *  C0 C1 80 81
    *  82 00 00 00
    *
    *  Has the parameter.
    *   C0 = PR-SCTP    (RFC3758)
    *   C1, 80 = ASCONF (addip draft)
    *   81 = Packet Drop
    *   82 = Stream Reset
    */
   
   /* draft-ietf-tsvwg-prsctp */
   #define SCTP_SUPPORTED_CHUNK_EXT    0x8008
   
   /* number of extensions we support */
   #define SCTP_EXT_COUNT 5        /* num of extensions we support chunk wise */
   #define SCTP_PAD_EXT_COUNT 3    /* num of pad bytes needed to get to 32 bit boundary */
   
   
   #define SCTP_PRSCTP_SUPPORTED       0xc000
   /* draft-ietf-tsvwg-addip-sctp */
   #define SCTP_ADD_IP_ADDRESS         0xc001
   #define SCTP_DEL_IP_ADDRESS         0xc002
   #define SCTP_ERROR_CAUSE_IND        0xc003
   #define SCTP_SET_PRIM_ADDR          0xc004
   #define SCTP_SUCCESS_REPORT         0xc005
   #define SCTP_ULP_ADAPTION           0xc006
   
   /* Notification error codes */
   #define SCTP_NOTIFY_DATAGRAM_UNSENT     0x0001
   #define SCTP_NOTIFY_DATAGRAM_SENT       0x0002
   #define SCTP_FAILED_THRESHOLD           0x0004
   #define SCTP_HEARTBEAT_SUCCESS          0x0008
   #define SCTP_RESPONSE_TO_USER_REQ       0x000f
   #define SCTP_INTERNAL_ERROR             0x0010
   #define SCTP_SHUTDOWN_GUARD_EXPIRES     0x0020
   #define SCTP_RECEIVED_SACK              0x0040
   #define SCTP_PEER_FAULTY                0x0080
   
   /* Error causes used in SCTP op-err's and aborts */
   #define SCTP_CAUSE_INV_STRM             0x001
   #define SCTP_CAUSE_MISS_PARAM           0x002
   #define SCTP_CAUSE_STALE_COOKIE         0x003
   #define SCTP_CAUSE_OUT_OF_RESC          0x004
   #define SCTP_CAUSE_UNRESOLV_ADDR        0x005
   #define SCTP_CAUSE_UNRECOG_CHUNK        0x006
   #define SCTP_CAUSE_INVALID_PARAM        0x007
   /* This one is also the same as SCTP_UNRECOG_PARAM above */
   #define SCTP_CAUSE_UNRECOG_PARAM        0x008
   #define SCTP_CAUSE_NOUSER_DATA          0x009
   #define SCTP_CAUSE_COOKIE_IN_SHUTDOWN   0x00a
   #define SCTP_CAUSE_RESTART_W_NEWADDR    0x00b
   #define SCTP_CAUSE_USER_INITIATED_ABT   0x00c
   #define SCTP_CAUSE_PROTOCOL_VIOLATION   0x00d
   
   /* Error's from add ip */
   #define SCTP_CAUSE_DELETEING_LAST_ADDR  0x100
   #define SCTP_CAUSE_OPERATION_REFUSED    0x101
   #define SCTP_CAUSE_DELETING_SRC_ADDR    0x102
   #define SCTP_CAUSE_ILLEGAL_ASCONF       0x103
   
   /* bits for TOS field */
   #define SCTP_ECT0_BIT           0x02
   #define SCTP_ECT1_BIT           0x01
   #define SCTP_CE_BITS            0x03
   
   /* below turns off above */
   #define SCTP_FLEXIBLE_ADDRESS   0x20
   #define SCTP_NO_HEARTBEAT       0x40
   
   /* mask to get sticky */
   #define SCTP_STICKY_OPTIONS_MASK        0x0c
   
   /* MTU discovery flags */
   #define SCTP_DONT_FRAGMENT      0x0100
   #define SCTP_FRAGMENT_OK        0x0200
   #define SCTP_PR_SCTP_ENABLED    0x0400
   #define SCTP_PR_SCTP_BUFFER     0x0800
   
   /* Chunk flags */
   #define SCTP_WINDOW_PROBE       0x01
   
   /*
    * SCTP states for internal state machine
    * XXX (should match "user" values)
    */
   #define SCTP_STATE_EMPTY                0x0000
   #define SCTP_STATE_INUSE                0x0001
   #define SCTP_STATE_COOKIE_WAIT          0x0002
   #define SCTP_STATE_COOKIE_ECHOED        0x0004
   #define SCTP_STATE_OPEN                 0x0008
   #define SCTP_STATE_SHUTDOWN_SENT        0x0010
   #define SCTP_STATE_SHUTDOWN_RECEIVED    0x0020
   #define SCTP_STATE_SHUTDOWN_ACK_SENT    0x0040
   #define SCTP_STATE_SHUTDOWN_PENDING     0x0080
   #define SCTP_STATE_CLOSED_SOCKET        0x0100
   #define SCTP_STATE_MASK                 0x007f
   
   #define SCTP_GET_STATE(asoc)    ((asoc)->state & SCTP_STATE_MASK)
   
   /* SCTP reachability state for each address */
   #define SCTP_ADDR_REACHABLE             0x001
   #define SCTP_ADDR_NOT_REACHABLE         0x002
   #define SCTP_ADDR_NOHB                  0x004
   #define SCTP_ADDR_BEING_DELETED         0x008
   #define SCTP_ADDR_NOT_IN_ASSOC          0x010
   #define SCTP_ADDR_WAS_PRIMARY           0x020
   #define SCTP_ADDR_SWITCH_PRIMARY        0x040
   #define SCTP_ADDR_OUT_OF_SCOPE          0x080
   #define SCTP_ADDR_DOUBLE_SWITCH         0x100
   #define SCTP_ADDR_UNCONFIRMED           0x200
   
   #define SCTP_REACHABLE_MASK             0x203
   
   /* bound address types (e.g. valid address types to allow) */
   #define SCTP_BOUND_V6           0x01
   #define SCTP_BOUND_V4           0x02
   
   /* How long a cookie lives in seconds */
   #define SCTP_DEFAULT_COOKIE_LIFE        60
   
   /* resource limit of streams */
   #define MAX_SCTP_STREAMS        2048
   
   /* Maximum the mapping array will  grow to (TSN mapping array) */
   #define SCTP_MAPPING_ARRAY      512
   
   /* size of the inital malloc on the mapping array */
   #define SCTP_INITIAL_MAPPING_ARRAY  16
   /* how much we grow the mapping array each call */
   #define SCTP_MAPPING_ARRAY_INCR     32
   
   /*
    * Here we define the timer types used by the implementation
    * as arguments in the set/get timer type calls.
    */
   #define SCTP_TIMER_INIT         0
   #define SCTP_TIMER_RECV         1
   #define SCTP_TIMER_SEND         2
   #define SCTP_TIMER_HEARTBEAT    3
   #define SCTP_TIMER_PMTU         4
   #define SCTP_TIMER_MAXSHUTDOWN  5
   #define SCTP_TIMER_SIGNATURE    6
   /*
    * number of timer types in the base SCTP structure used in
    * the set/get and has the base default.
    */
   #define SCTP_NUM_TMRS   7
   
   /* timer types */
   #define SCTP_TIMER_TYPE_NONE            0
   #define SCTP_TIMER_TYPE_SEND            1
   #define SCTP_TIMER_TYPE_INIT            2
   #define SCTP_TIMER_TYPE_RECV            3
   #define SCTP_TIMER_TYPE_SHUTDOWN        4
   #define SCTP_TIMER_TYPE_HEARTBEAT       5
   #define SCTP_TIMER_TYPE_COOKIE          6
   #define SCTP_TIMER_TYPE_NEWCOOKIE       7
   #define SCTP_TIMER_TYPE_PATHMTURAISE    8
   #define SCTP_TIMER_TYPE_SHUTDOWNACK     9
   #define SCTP_TIMER_TYPE_ASCONF          10
   #define SCTP_TIMER_TYPE_SHUTDOWNGUARD   11
   #define SCTP_TIMER_TYPE_AUTOCLOSE       12
   #define SCTP_TIMER_TYPE_EVENTWAKE       13
   #define SCTP_TIMER_TYPE_STRRESET        14
   #define SCTP_TIMER_TYPE_INPKILL         15
   
   /*
    * Number of ticks before the soxwakeup() event that
    * is delayed is sent AFTER the accept() call
    */
   #define SCTP_EVENTWAKEUP_WAIT_TICKS     3000
   
   /*
    * Of course we really don't collect stale cookies, being folks
    * of decerning taste. However we do count them, if we get too
    * many before the association comes up.. we give up. Below is
    * the constant that dictates when we give it up...this is a
    * implemenation dependent treatment. In ours we do not ask for
    * a extension of time, but just retry this many times...
    */
   #define SCTP_MAX_STALE_COOKIES_I_COLLECT 10
   
   /* max number of TSN's dup'd that I will hold */
   #define SCTP_MAX_DUP_TSNS       20
   
   #define SCTP_TIMER_TYPE_ITERATOR        16
   /*
    * Here we define the types used when setting the retry amounts.
    */
   /* constants for type of set */
   #define SCTP_MAXATTEMPT_INIT    2
   #define SCTP_MAXATTEMPT_SEND    3
   
   /* Maximum TSN's we will summarize in a drop report */
   
   #define SCTP_MAX_DROP_REPORT 16
   
   /* How many drop re-attempts we make on  INIT/COOKIE-ECHO */
   #define SCTP_RETRY_DROPPED_THRESH 4
   
   /* And the max we will keep a history of in the tcb
    * which MUST be lower than 256.
    */
   
   #define SCTP_MAX_DROP_SAVE_REPORT 16
   
   /*
    * Here we define the default timers and the default number
    * of attemts we make for each respective side (send/init).
    */
   
   /* Maxmium number of chunks a single association can have
    * on it. Note that this is a squishy number since
    * the count can run over this if the user sends a large
    * message down .. the fragmented chunks don't count until
    * AFTER the message is on queue.. it would be the next
    * send that blocks things. This number will get tuned
    * up at boot in the sctp_init and use the number
    * of clusters as a base. This way high bandwidth
    * environments will not get impacted by the lower
    * bandwidth sending a bunch of 1 byte chunks
    */
   #define SCTP_ASOC_MAX_CHUNKS_ON_QUEUE 512
   
   #define MSEC_TO_TICKS(x) (((x) * hz) / 1000)
   #define TICKS_TO_MSEC(x) (((x) * 1000) / hz)
   #define SEC_TO_TICKS(x) ((x) * hz)
   
   /* init timer def = 1 sec */
   #define SCTP_INIT_SEC   1
   
   /* send timer def = 1 seconds */
   #define SCTP_SEND_SEC   1
   
   /* recv timer def = 200ms  */
   #define SCTP_RECV_MSEC  200
   
   /* 30 seconds + RTO (in ms) */
   #define SCTP_HB_DEFAULT_MSEC    30000
   
   /* Max time I will wait for Shutdown to complete */
   #define SCTP_DEF_MAX_SHUTDOWN_SEC 180
   
   
   /* This is how long a secret lives, NOT how long a cookie lives
    * how many ticks the current secret will live.
    */
   #define SCTP_DEFAULT_SECRET_LIFE_SEC 3600
   
   #define SCTP_RTO_UPPER_BOUND    (60000) /* 60 sec in ms */
   #define SCTP_RTO_UPPER_BOUND_SEC 60     /* for the init timer */
   #define SCTP_RTO_LOWER_BOUND    (1000)  /* 1 sec in ms */
   #define SCTP_RTO_INITIAL        (3000)  /* 3 sec in ms */
   
   
   #define SCTP_INP_KILL_TIMEOUT 1000 /* number of ms to retry kill of inpcb*/
   
   #define SCTP_DEF_MAX_INIT       8
   #define SCTP_DEF_MAX_SEND       10
   
   #define SCTP_DEF_PMTU_RAISE_SEC 600  /* 10 min between raise attempts */
   #define SCTP_DEF_PMTU_MIN       600
   
   #define SCTP_MSEC_IN_A_SEC      1000
   #define SCTP_USEC_IN_A_SEC      1000000
   #define SCTP_NSEC_IN_A_SEC      1000000000
   
   #define SCTP_MAX_OUTSTANDING_DG 10000
   
   /* How many streams I request initally by default */
   #define SCTP_OSTREAM_INITIAL 10
   
   #define SCTP_SEG_TO_RWND_UPD 32 /* How many smallest_mtu's need to increase before
                                    * a window update sack is sent (should be a
                                    * power of 2).
                                    */
   #define SCTP_SCALE_OF_RWND_TO_UPD       4       /* Incr * this > hiwat, send
                                                    * window update. Should be a
                                                    * power of 2.
                                                    */
   #define SCTP_MINIMAL_RWND               (4096) /* minimal rwnd */
   
   #define SCTP_ADDRMAX            20
   
   
   /* SCTP DEBUG Switch parameters */
   #define SCTP_DEBUG_TIMER1       0x00000001
   #define SCTP_DEBUG_TIMER2       0x00000002
   #define SCTP_DEBUG_TIMER3       0x00000004
   #define SCTP_DEBUG_TIMER4       0x00000008
   #define SCTP_DEBUG_OUTPUT1      0x00000010
   #define SCTP_DEBUG_OUTPUT2      0x00000020
   #define SCTP_DEBUG_OUTPUT3      0x00000040
   #define SCTP_DEBUG_OUTPUT4      0x00000080
   #define SCTP_DEBUG_UTIL1        0x00000100
   #define SCTP_DEBUG_UTIL2        0x00000200
   #define SCTP_DEBUG_INPUT1       0x00001000
   #define SCTP_DEBUG_INPUT2       0x00002000
   #define SCTP_DEBUG_INPUT3       0x00004000
   #define SCTP_DEBUG_INPUT4       0x00008000
   #define SCTP_DEBUG_ASCONF1      0x00010000
   #define SCTP_DEBUG_ASCONF2      0x00020000
   #define SCTP_DEBUG_OUTPUT5      0x00040000
   #define SCTP_DEBUG_PCB1         0x00100000
   #define SCTP_DEBUG_PCB2         0x00200000
   #define SCTP_DEBUG_PCB3         0x00400000
   #define SCTP_DEBUG_PCB4         0x00800000
   #define SCTP_DEBUG_INDATA1      0x01000000
   #define SCTP_DEBUG_INDATA2      0x02000000
   #define SCTP_DEBUG_INDATA3      0x04000000
   #define SCTP_DEBUG_INDATA4      0x08000000
   #define SCTP_DEBUG_USRREQ1      0x10000000
   #define SCTP_DEBUG_USRREQ2      0x20000000
   #define SCTP_DEBUG_PEEL1        0x40000000
   #define SCTP_DEBUG_ALL          0x7ff3f3ff
   #define SCTP_DEBUG_NOISY        0x00040000
   
   /* What sender needs to see to avoid SWS or we consider peers rwnd 0 */
   #define SCTP_SWS_SENDER_DEF     1420
   
   /*
    * SWS is scaled to the sb_hiwat of the socket.
    * A value of 2 is hiwat/4, 1 would be hiwat/2 etc.
    */
   /* What receiver needs to see in sockbuf or we tell peer its 1 */
   #define SCTP_SWS_RECEIVER_DEF   3000
   
   
   #define SCTP_INITIAL_CWND 4380
   
   /* amount peer is obligated to have in rwnd or I will abort */
   #define SCTP_MIN_RWND   1500
   
   #define SCTP_WINDOW_MIN 1500    /* smallest rwnd can be */
   #define SCTP_WINDOW_MAX 1048576 /* biggest I can grow rwnd to
                                    * My playing around suggests a
                                    * value greater than 64k does not
                                    * do much, I guess via the kernel
                                    * limitations on the stream/socket.
                                    */
   
   #define SCTP_MAX_BUNDLE_UP      256     /* max number of chunks to bundle */
   
   /*  I can handle a 1meg re-assembly */
   #define SCTP_DEFAULT_MAXMSGREASM 1048576
   
   #define SCTP_DEFAULT_MAXSEGMENT 65535
   
   #define DEFAULT_CHUNK_BUFFER    2048
   #define DEFAULT_PARAM_BUFFER    512
   
   #define SCTP_DEFAULT_MINSEGMENT 512     /* MTU size ... if no mtu disc */
   #define SCTP_HOW_MANY_SECRETS   2       /* how many secrets I keep */
   
   #define SCTP_NUMBER_OF_SECRETS  8       /* or 8 * 4 = 32 octets */
   #define SCTP_SECRET_SIZE        32      /* number of octets in a 256 bits */
   
   #ifdef USE_MD5
   #define SCTP_SIGNATURE_SIZE     16      /* size of a MD5 signature */
   #else
   #define SCTP_SIGNATURE_SIZE     20      /* size of a SLA-1 signature */
   #endif /* USE_MD5 */
   
   #define SCTP_SIGNATURE_ALOC_SIZE 20
   
   /*
    * SCTP upper layer notifications
    */
   #define SCTP_NOTIFY_ASSOC_UP            1
   #define SCTP_NOTIFY_ASSOC_DOWN          2
   #define SCTP_NOTIFY_INTERFACE_DOWN      3
   #define SCTP_NOTIFY_INTERFACE_UP        4
   #define SCTP_NOTIFY_DG_FAIL             5
   #define SCTP_NOTIFY_STRDATA_ERR         6
   #define SCTP_NOTIFY_ASSOC_ABORTED       7
   #define SCTP_NOTIFY_PEER_OPENED_STREAM  8
   #define SCTP_NOTIFY_STREAM_OPENED_OK    9
   #define SCTP_NOTIFY_ASSOC_RESTART       10
   #define SCTP_NOTIFY_HB_RESP             11
   #define SCTP_NOTIFY_ASCONF_SUCCESS      12
   #define SCTP_NOTIFY_ASCONF_FAILED       13
   #define SCTP_NOTIFY_PEER_SHUTDOWN       14
   #define SCTP_NOTIFY_ASCONF_ADD_IP       15
   #define SCTP_NOTIFY_ASCONF_DELETE_IP    16
   #define SCTP_NOTIFY_ASCONF_SET_PRIMARY  17
   #define SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION 18
   #define SCTP_NOTIFY_ADAPTION_INDICATION         19
   #define SCTP_NOTIFY_INTERFACE_CONFIRMED 20
   #define SCTP_NOTIFY_STR_RESET_RECV      21
   #define SCTP_NOTIFY_STR_RESET_SEND      22
   #define SCTP_NOTIFY_MAX                 22
   
   
   
   
   
   /* clock variance is 10ms */
   #define SCTP_CLOCK_GRANULARITY  10
   
   #define IP_HDR_SIZE 40          /* we use the size of a IP6 header here
                                    * this detracts a small amount for ipv4
                                    * but it simplifies the ipv6 addition
                                    */
   
   #ifndef IPPROTO_SCTP
   #define IPPROTO_SCTP 132        /* the Official IANA number :-) */
   #endif /* !IPPROTO_SCTP */
   
   #define SCTP_MAX_DATA_BUNDLING          256
   #define SCTP_MAX_CONTROL_BUNDLING       20
   
   /* modular comparison */
   /* True if a > b (mod = M) */
   #define compare_with_wrap(a, b, M) (((a > b) && ((a - b) < ((M >> 1) + 1))) || \
                 ((b > a) && ((b - a) > ((M >> 1) + 1))))
   
   
   /* Mapping array manipulation routines */
   #define SCTP_IS_TSN_PRESENT(arry, gap) ((arry[(gap >> 3)] >> (gap & 0x07)) & 0x01)
   #define SCTP_SET_TSN_PRESENT(arry, gap) (arry[(gap >> 3)] |= (0x01 << ((gap & 0x07))))
   #define SCTP_UNSET_TSN_PRESENT(arry, gap) (arry[(gap >> 3)] &= ((~(0x01 << ((gap & 0x07)))) & 0xff))
   
   /* pegs */
   #define SCTP_NUMBER_OF_PEGS     96
   /* peg index's */
   #define SCTP_PEG_SACKS_SEEN     0
   #define SCTP_PEG_SACKS_SENT     1
   #define SCTP_PEG_TSNS_SENT      2
   #define SCTP_PEG_TSNS_RCVD      3
   #define SCTP_DATAGRAMS_SENT     4
   #define SCTP_DATAGRAMS_RCVD     5
   #define SCTP_RETRANTSN_SENT     6
   #define SCTP_DUPTSN_RECVD       7
   #define SCTP_HB_RECV            8
   #define SCTP_HB_ACK_RECV        9
   #define SCTP_HB_SENT            10
   #define SCTP_WINDOW_PROBES      11
   #define SCTP_DATA_DG_RECV       12
   #define SCTP_TMIT_TIMER         13
   #define SCTP_RECV_TIMER         14
   #define SCTP_HB_TIMER           15
   #define SCTP_FAST_RETRAN        16
   #define SCTP_TIMERS_EXP         17
   #define SCTP_FR_INAWINDOW       18
   #define SCTP_RWND_BLOCKED       19
   #define SCTP_CWND_BLOCKED       20
   #define SCTP_RWND_DROPS         21
   #define SCTP_BAD_STRMNO         22
   #define SCTP_BAD_SSN_WRAP       23
   #define SCTP_DROP_NOMEMORY      24
   #define SCTP_DROP_FRAG          25
   #define SCTP_BAD_VTAGS          26
   #define SCTP_BAD_CSUM           27
   #define SCTP_INPKTS             28
   #define SCTP_IN_MCAST           29
   #define SCTP_HDR_DROPS          30
   #define SCTP_NOPORTS            31
   #define SCTP_CWND_NOFILL        32
   #define SCTP_CALLS_TO_CO        33
   #define SCTP_CO_NODATASNT       34
   #define SCTP_CWND_NOUSE_SS      35
   #define SCTP_MAX_BURST_APL      36
   #define SCTP_EXPRESS_ROUTE      37
   #define SCTP_NO_COPY_IN         38
   #define SCTP_CACHED_SRC         39
   #define SCTP_CWND_NOCUM         40
   #define SCTP_CWND_SS            41
   #define SCTP_CWND_CA            42
   #define SCTP_CWND_SKIP          43
   #define SCTP_CWND_NOUSE_CA      44
   #define SCTP_MAX_CWND           45
   #define SCTP_CWND_DIFF_CA       46
   #define SCTP_CWND_DIFF_SA       47
   #define SCTP_OQS_AT_SS          48
   #define SCTP_SQQ_AT_SS          49
   #define SCTP_OQS_AT_CA          50
   #define SCTP_SQQ_AT_CA          51
   #define SCTP_MOVED_MTU          52
   #define SCTP_MOVED_QMAX         53
   #define SCTP_SQC_AT_SS          54
   #define SCTP_SQC_AT_CA          55
   #define SCTP_MOVED_MAX          56
   #define SCTP_MOVED_NLEF         57
   #define SCTP_NAGLE_NOQ          58
   #define SCTP_NAGLE_OFF          59
   #define SCTP_OUTPUT_FRM_SND     60
   #define SCTP_SOS_NOSNT          61
   #define SCTP_NOS_NOSNT          62
   #define SCTP_SOSE_NOSNT         63
   #define SCTP_NOSE_NOSNT         64
   #define SCTP_DATA_OUT_ERR       65
   #define SCTP_DUP_SSN_RCVD       66
   #define SCTP_DUP_FR             67
   #define SCTP_VTAG_EXPR          68
   #define SCTP_VTAG_BOGUS         69
   #define SCTP_T3_SAFEGRD         70
   #define SCTP_PDRP_FMBOX         71
   #define SCTP_PDRP_FEHOS         72
   #define SCTP_PDRP_MB_DA         73
   #define SCTP_PDRP_MB_CT         74
   #define SCTP_PDRP_BWRPT         75
   #define SCTP_PDRP_CRUPT         76
   #define SCTP_PDRP_NEDAT         77
   #define SCTP_PDRP_PDBRK         78
   #define SCTP_PDRP_TSNNF         79
   #define SCTP_PDRP_DNFND         80
   #define SCTP_PDRP_DIWNP         81
   #define SCTP_PDRP_DIZRW         82
   #define SCTP_PDRP_BADD          83
   #define SCTP_PDRP_MARK          84
   #define SCTP_ECNE_RCVD          85
   #define SCTP_CWR_PERFO          86
   #define SCTP_ECNE_SENT          87
   #define SCTP_MSGC_DROP          88
   #define SCTP_SEND_QUEUE_POP     89
   #define SCTP_ERROUT_FRM_USR     90
   #define SCTP_SENDTO_FULL_CWND   91
   #define SCTP_QUEONLY_BURSTLMT   92
   #define SCTP_IFP_QUEUE_FULL     93
   #define SCTP_RESV2              94
   #define SCTP_RESV3              95
   
   /*
    * This value defines the number of vtag block time wait entry's
    * per list element.  Each entry will take 2 4 byte ints (and of
    * course the overhead of the next pointer as well). Using 15 as
    * an example will yield * ((8 * 15) + 8) or 128 bytes of overhead
    * for each timewait block that gets initialized. Increasing it to
    * 31 would yeild 256 bytes per block.
    */
   /* Undef the following turns on per EP behavior */
   #define SCTP_VTAG_TIMEWAIT_PER_STACK 1
   #ifdef SCTP_VTAG_TIMEWAIT_PER_STACK
   #define SCTP_NUMBER_IN_VTAG_BLOCK 15
   #else
   /* The hash list is smaller if we are on a ep basis */
   #define SCTP_NUMBER_IN_VTAG_BLOCK 3
   #endif
   /*
    * If we use the STACK option, we have an array of this size head
    * pointers. This array is mod'd the with the size to find which
    * bucket and then all entries must be searched to see if the tag
    * is in timed wait. If so we reject it.
    */
   #define SCTP_STACK_VTAG_HASH_SIZE 31
   
   /*
    * If we use the per-endpoint model than we do not have a hash
    * table of entries but instead have a single head pointer and
    * we must crawl through the entire list.
    */
   
   /*
    * Number of seconds of time wait, tied to MSL value (2 minutes),
    * so 2 * MSL = 4 minutes or 480 seconds.
    */
   #define SCTP_TIME_WAIT 480
   
   #define IN4_ISPRIVATE_ADDRESS(a) \
      ((((u_char *)&(a)->s_addr)[0] == 10) || \
       ((((u_char *)&(a)->s_addr)[0] == 172) && \
        (((u_char *)&(a)->s_addr)[1] >= 16) && \
        (((u_char *)&(a)->s_addr)[1] <= 32)) || \
       ((((u_char *)&(a)->s_addr)[0] == 192) && \
        (((u_char *)&(a)->s_addr)[1] == 168)))
   
   #define IN4_ISLOOPBACK_ADDRESS(a) \
       ((((u_char *)&(a)->s_addr)[0] == 127) && \
        (((u_char *)&(a)->s_addr)[1] == 0) && \
        (((u_char *)&(a)->s_addr)[2] == 0) && \
        (((u_char *)&(a)->s_addr)[3] == 1))
   
   
   #if defined(_KERNEL) || (defined(__APPLE__) && defined(KERNEL))
   
   #if defined(__FreeBSD__) || defined(__APPLE__) || defined(__DragonFly__)
   #define SCTP_GETTIME_TIMEVAL(x) (microuptime(x))
   #define SCTP_GETTIME_TIMESPEC(x) (nanouptime(x))
   #else
   #define SCTP_GETTIME_TIMEVAL(x) (microtime(x))
   #define SCTP_GETTIME_TIMESPEC(x) (nanotime(x))
   #endif /* __FreeBSD__ */
   
   #define sctp_sowwakeup(inp, so) \
   do { \
           if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
                   inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEOUTPUT; \
           } else { \
                   sowwakeup(so); \
           } \
   } while (0)
   
   #define sctp_sorwakeup(inp, so) \
   do { \
           if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
                   inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEINPUT; \
           } else { \
                   sorwakeup(so); \
           } \
   } while (0)
   
   #endif /* _KERNEL */
   #endif

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