The Design and Implementation of the FreeBSD Operating System, Second Edition
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sys/netinet/sctp_constants.h

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    1 /*-
    2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
    3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
    4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions are met:
    8  *
    9  * a) Redistributions of source code must retain the above copyright notice,
   10  *    this list of conditions and the following disclaimer.
   11  *
   12  * b) Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in
   14  *    the documentation and/or other materials provided with the distribution.
   15  *
   16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   17  *    contributors may be used to endorse or promote products derived
   18  *    from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/10.3/sys/netinet/sctp_constants.h 296052 2016-02-25 18:46:06Z tuexen $");
   35 
   36 #ifndef _NETINET_SCTP_CONSTANTS_H_
   37 #define _NETINET_SCTP_CONSTANTS_H_
   38 
   39 
   40 /* IANA assigned port number for SCTP over UDP encapsulation */
   41 #define SCTP_OVER_UDP_TUNNELING_PORT 9899
   42 
   43 /* Number of packets to get before sack sent by default */
   44 #define SCTP_DEFAULT_SACK_FREQ 2
   45 
   46 /* Address limit - This variable is calculated
   47  * based on an 65535 byte max ip packet. We take out 100 bytes
   48  * for the cookie, 40 bytes for a v6 header and 32
   49  * bytes for the init structure. A second init structure
   50  * for the init-ack and then finally a third one for the
   51  * imbedded init. This yeilds 100+40+(3 * 32) = 236 bytes.
   52  * This leaves 65299 bytes for addresses. We throw out the 299 bytes.
   53  * Now whatever we send in the INIT() we need to allow to get back in the
   54  * INIT-ACK plus all the values from INIT and INIT-ACK
   55  * listed in the cookie. Plus we need some overhead for
   56  * maybe copied parameters in the COOKIE. If we
   57  * allow 1080 addresses, and each side has 1080 V6 addresses
   58  * that will be 21600 bytes. In the INIT-ACK we will
   59  * see the INIT-ACK 21600 + 43200 in the cookie. This leaves
   60  * about 500 bytes slack for misc things in the cookie.
   61  */
   62 #define SCTP_ADDRESS_LIMIT 1080
   63 
   64 /* We need at least 2k of space for us, inits
   65  * larger than that lets abort.
   66  */
   67 #define SCTP_LARGEST_INIT_ACCEPTED (65535 - 2048)
   68 
   69 /* Largest length of a chunk */
   70 #define SCTP_MAX_CHUNK_LENGTH 0xffff
   71 /* Number of addresses where we just skip the counting */
   72 #define SCTP_COUNT_LIMIT 40
   73 
   74 #define SCTP_ZERO_COPY_TICK_DELAY (((100 * hz) + 999) / 1000)
   75 #define SCTP_ZERO_COPY_SENDQ_TICK_DELAY (((100 * hz) + 999) / 1000)
   76 
   77 /* Number of ticks to delay before running
   78  * iterator on an address change.
   79  */
   80 #define SCTP_ADDRESS_TICK_DELAY 2
   81 
   82 #define SCTP_VERSION_STRING "KAME-BSD 1.1"
   83 /* #define SCTP_AUDITING_ENABLED 1 used for debug/auditing */
   84 #define SCTP_AUDIT_SIZE 256
   85 
   86 
   87 #define SCTP_KTRHEAD_NAME "sctp_iterator"
   88 #define SCTP_KTHREAD_PAGES 0
   89 
   90 #define SCTP_MCORE_NAME "sctp_core_worker"
   91 
   92 
   93 /* If you support Multi-VRF how big to
   94  * make the initial array of VRF's to.
   95  */
   96 #define SCTP_DEFAULT_VRF_SIZE 4
   97 
   98 /* constants for rto calc */
   99 #define sctp_align_safe_nocopy 0
  100 #define sctp_align_unsafe_makecopy 1
  101 
  102 /* JRS - Values defined for the HTCP algorithm */
  103 #define ALPHA_BASE      (1<<7)  /* 1.0 with shift << 7 */
  104 #define BETA_MIN        (1<<6)  /* 0.5 with shift << 7 */
  105 #define BETA_MAX        102     /* 0.8 with shift << 7 */
  106 
  107 /* Places that CWND log can happen from */
  108 #define SCTP_CWND_LOG_FROM_FR   1
  109 #define SCTP_CWND_LOG_FROM_RTX  2
  110 #define SCTP_CWND_LOG_FROM_BRST 3
  111 #define SCTP_CWND_LOG_FROM_SS   4
  112 #define SCTP_CWND_LOG_FROM_CA   5
  113 #define SCTP_CWND_LOG_FROM_SAT  6
  114 #define SCTP_BLOCK_LOG_INTO_BLK 7
  115 #define SCTP_BLOCK_LOG_OUTOF_BLK 8
  116 #define SCTP_BLOCK_LOG_CHECK     9
  117 #define SCTP_STR_LOG_FROM_INTO_STRD 10
  118 #define SCTP_STR_LOG_FROM_IMMED_DEL 11
  119 #define SCTP_STR_LOG_FROM_INSERT_HD 12
  120 #define SCTP_STR_LOG_FROM_INSERT_MD 13
  121 #define SCTP_STR_LOG_FROM_INSERT_TL 14
  122 #define SCTP_STR_LOG_FROM_MARK_TSN  15
  123 #define SCTP_STR_LOG_FROM_EXPRS_DEL 16
  124 #define SCTP_FR_LOG_BIGGEST_TSNS    17
  125 #define SCTP_FR_LOG_STRIKE_TEST     18
  126 #define SCTP_FR_LOG_STRIKE_CHUNK    19
  127 #define SCTP_FR_T3_TIMEOUT          20
  128 #define SCTP_MAP_PREPARE_SLIDE      21
  129 #define SCTP_MAP_SLIDE_FROM         22
  130 #define SCTP_MAP_SLIDE_RESULT       23
  131 #define SCTP_MAP_SLIDE_CLEARED      24
  132 #define SCTP_MAP_SLIDE_NONE         25
  133 #define SCTP_FR_T3_MARK_TIME        26
  134 #define SCTP_FR_T3_MARKED           27
  135 #define SCTP_FR_T3_STOPPED          28
  136 #define SCTP_FR_MARKED              30
  137 #define SCTP_CWND_LOG_NOADV_SS      31
  138 #define SCTP_CWND_LOG_NOADV_CA      32
  139 #define SCTP_MAX_BURST_APPLIED      33
  140 #define SCTP_MAX_IFP_APPLIED        34
  141 #define SCTP_MAX_BURST_ERROR_STOP   35
  142 #define SCTP_INCREASE_PEER_RWND     36
  143 #define SCTP_DECREASE_PEER_RWND     37
  144 #define SCTP_SET_PEER_RWND_VIA_SACK 38
  145 #define SCTP_LOG_MBCNT_INCREASE     39
  146 #define SCTP_LOG_MBCNT_DECREASE     40
  147 #define SCTP_LOG_MBCNT_CHKSET       41
  148 #define SCTP_LOG_NEW_SACK           42
  149 #define SCTP_LOG_TSN_ACKED          43
  150 #define SCTP_LOG_TSN_REVOKED        44
  151 #define SCTP_LOG_LOCK_TCB           45
  152 #define SCTP_LOG_LOCK_INP           46
  153 #define SCTP_LOG_LOCK_SOCK          47
  154 #define SCTP_LOG_LOCK_SOCKBUF_R     48
  155 #define SCTP_LOG_LOCK_SOCKBUF_S     49
  156 #define SCTP_LOG_LOCK_CREATE        50
  157 #define SCTP_LOG_INITIAL_RTT        51
  158 #define SCTP_LOG_RTTVAR             52
  159 #define SCTP_LOG_SBALLOC            53
  160 #define SCTP_LOG_SBFREE             54
  161 #define SCTP_LOG_SBRESULT           55
  162 #define SCTP_FR_DUPED               56
  163 #define SCTP_FR_MARKED_EARLY        57
  164 #define SCTP_FR_CWND_REPORT         58
  165 #define SCTP_FR_CWND_REPORT_START   59
  166 #define SCTP_FR_CWND_REPORT_STOP    60
  167 #define SCTP_CWND_LOG_FROM_SEND     61
  168 #define SCTP_CWND_INITIALIZATION    62
  169 #define SCTP_CWND_LOG_FROM_T3       63
  170 #define SCTP_CWND_LOG_FROM_SACK     64
  171 #define SCTP_CWND_LOG_NO_CUMACK     65
  172 #define SCTP_CWND_LOG_FROM_RESEND   66
  173 #define SCTP_FR_LOG_CHECK_STRIKE    67
  174 #define SCTP_SEND_NOW_COMPLETES     68
  175 #define SCTP_CWND_LOG_FILL_OUTQ_CALLED 69
  176 #define SCTP_CWND_LOG_FILL_OUTQ_FILLS  70
  177 #define SCTP_LOG_FREE_SENT             71
  178 #define SCTP_NAGLE_APPLIED          72
  179 #define SCTP_NAGLE_SKIPPED          73
  180 #define SCTP_WAKESND_FROM_SACK      74
  181 #define SCTP_WAKESND_FROM_FWDTSN    75
  182 #define SCTP_NOWAKE_FROM_SACK       76
  183 #define SCTP_CWNDLOG_PRESEND        77
  184 #define SCTP_CWNDLOG_ENDSEND        78
  185 #define SCTP_AT_END_OF_SACK         79
  186 #define SCTP_REASON_FOR_SC          80
  187 #define SCTP_BLOCK_LOG_INTO_BLKA    81
  188 #define SCTP_ENTER_USER_RECV        82
  189 #define SCTP_USER_RECV_SACKS        83
  190 #define SCTP_SORECV_BLOCKSA         84
  191 #define SCTP_SORECV_BLOCKSB         85
  192 #define SCTP_SORECV_DONE            86
  193 #define SCTP_SACK_RWND_UPDATE       87
  194 #define SCTP_SORECV_ENTER           88
  195 #define SCTP_SORECV_ENTERPL         89
  196 #define SCTP_MBUF_INPUT             90
  197 #define SCTP_MBUF_IALLOC            91
  198 #define SCTP_MBUF_IFREE             92
  199 #define SCTP_MBUF_ICOPY             93
  200 #define SCTP_MBUF_SPLIT             94
  201 #define SCTP_SORCV_FREECTL          95
  202 #define SCTP_SORCV_DOESCPY          96
  203 #define SCTP_SORCV_DOESLCK          97
  204 #define SCTP_SORCV_DOESADJ          98
  205 #define SCTP_SORCV_BOTWHILE         99
  206 #define SCTP_SORCV_PASSBF          100
  207 #define SCTP_SORCV_ADJD            101
  208 #define SCTP_UNKNOWN_MAX           102
  209 #define SCTP_RANDY_STUFF           103
  210 #define SCTP_RANDY_STUFF1          104
  211 #define SCTP_STRMOUT_LOG_ASSIGN    105
  212 #define SCTP_STRMOUT_LOG_SEND      106
  213 #define SCTP_FLIGHT_LOG_DOWN_CA    107
  214 #define SCTP_FLIGHT_LOG_UP         108
  215 #define SCTP_FLIGHT_LOG_DOWN_GAP   109
  216 #define SCTP_FLIGHT_LOG_DOWN_RSND  110
  217 #define SCTP_FLIGHT_LOG_UP_RSND    111
  218 #define SCTP_FLIGHT_LOG_DOWN_RSND_TO    112
  219 #define SCTP_FLIGHT_LOG_DOWN_WP    113
  220 #define SCTP_FLIGHT_LOG_UP_REVOKE  114
  221 #define SCTP_FLIGHT_LOG_DOWN_PDRP  115
  222 #define SCTP_FLIGHT_LOG_DOWN_PMTU  116
  223 #define SCTP_SACK_LOG_NORMAL       117
  224 #define SCTP_SACK_LOG_EXPRESS      118
  225 #define SCTP_MAP_TSN_ENTERS        119
  226 #define SCTP_THRESHOLD_CLEAR       120
  227 #define SCTP_THRESHOLD_INCR        121
  228 #define SCTP_FLIGHT_LOG_DWN_WP_FWD 122
  229 #define SCTP_FWD_TSN_CHECK         123
  230 #define SCTP_LOG_MAX_TYPES 124
  231 /*
  232  * To turn on various logging, you must first enable 'options KTR' and
  233  * you might want to bump the entires 'options KTR_ENTRIES=80000'.
  234  * To get something to log you define one of the logging defines.
  235  * (see LINT).
  236  *
  237  * This gets the compile in place, but you still need to turn the
  238  * logging flag on too in the sysctl (see in sctp.h).
  239  */
  240 
  241 #define SCTP_LOG_EVENT_UNKNOWN 0
  242 #define SCTP_LOG_EVENT_CWND  1
  243 #define SCTP_LOG_EVENT_BLOCK 2
  244 #define SCTP_LOG_EVENT_STRM  3
  245 #define SCTP_LOG_EVENT_FR    4
  246 #define SCTP_LOG_EVENT_MAP   5
  247 #define SCTP_LOG_EVENT_MAXBURST 6
  248 #define SCTP_LOG_EVENT_RWND  7
  249 #define SCTP_LOG_EVENT_MBCNT 8
  250 #define SCTP_LOG_EVENT_SACK  9
  251 #define SCTP_LOG_LOCK_EVENT 10
  252 #define SCTP_LOG_EVENT_RTT  11
  253 #define SCTP_LOG_EVENT_SB   12
  254 #define SCTP_LOG_EVENT_NAGLE 13
  255 #define SCTP_LOG_EVENT_WAKE 14
  256 #define SCTP_LOG_MISC_EVENT 15
  257 #define SCTP_LOG_EVENT_CLOSE 16
  258 #define SCTP_LOG_EVENT_MBUF 17
  259 #define SCTP_LOG_CHUNK_PROC 18
  260 #define SCTP_LOG_ERROR_RET  19
  261 
  262 #define SCTP_LOG_MAX_EVENT 20
  263 
  264 #define SCTP_LOCK_UNKNOWN 2
  265 
  266 
  267 /* number of associations by default for zone allocation */
  268 #define SCTP_MAX_NUM_OF_ASOC    40000
  269 /* how many addresses per assoc remote and local */
  270 #define SCTP_SCALE_FOR_ADDR     2
  271 
  272 /* default MULTIPLE_ASCONF mode enable(1)/disable(0) value (sysctl) */
  273 #define SCTP_DEFAULT_MULTIPLE_ASCONFS   0
  274 
  275 /*
  276  * Theshold for rwnd updates, we have to read (sb_hiwat >>
  277  * SCTP_RWND_HIWAT_SHIFT) before we will look to see if we need to send a
  278  * window update sack. When we look, we compare the last rwnd we sent vs the
  279  * current rwnd. It too must be greater than this value. Using 3 divdes the
  280  * hiwat by 8, so for 200k rwnd we need to read 24k. For a 64k rwnd we need
  281  * to read 8k. This seems about right.. I hope :-D.. we do set a
  282  * min of a MTU on it so if the rwnd is real small we will insist
  283  * on a full MTU of 1500 bytes.
  284  */
  285 #define SCTP_RWND_HIWAT_SHIFT 3
  286 
  287 /* How much of the rwnd must the
  288  * message be taking up to start partial delivery.
  289  * We calculate this by shifing the hi_water (recv_win)
  290  * left the following .. set to 1, when a message holds
  291  * 1/2 the rwnd. If we set it to 2 when a message holds
  292  * 1/4 the rwnd...etc..
  293  */
  294 
  295 #define SCTP_PARTIAL_DELIVERY_SHIFT 1
  296 
  297 /*
  298  * default HMAC for cookies, etc... use one of the AUTH HMAC id's
  299  * SCTP_HMAC is the HMAC_ID to use
  300  * SCTP_SIGNATURE_SIZE is the digest length
  301  */
  302 #define SCTP_HMAC               SCTP_AUTH_HMAC_ID_SHA1
  303 #define SCTP_SIGNATURE_SIZE     SCTP_AUTH_DIGEST_LEN_SHA1
  304 #define SCTP_SIGNATURE_ALOC_SIZE SCTP_SIGNATURE_SIZE
  305 
  306 /*
  307  * the SCTP protocol signature this includes the version number encoded in
  308  * the last 4 bits of the signature.
  309  */
  310 #define PROTO_SIGNATURE_A       0x30000000
  311 #define SCTP_VERSION_NUMBER     0x3
  312 
  313 #define MAX_TSN 0xffffffff
  314 
  315 /* how many executions every N tick's */
  316 #define SCTP_ITERATOR_MAX_AT_ONCE 20
  317 
  318 /* number of clock ticks between iterator executions */
  319 #define SCTP_ITERATOR_TICKS 1
  320 
  321 /*
  322  * option: If you comment out the following you will receive the old behavior
  323  * of obeying cwnd for the fast retransmit algorithm. With this defined a FR
  324  * happens right away with-out waiting for the flightsize to drop below the
  325  * cwnd value (which is reduced by the FR to 1/2 the inflight packets).
  326  */
  327 #define SCTP_IGNORE_CWND_ON_FR 1
  328 
  329 /*
  330  * Adds implementors guide behavior to only use newest highest update in SACK
  331  * gap ack's to figure out if you need to stroke a chunk for FR.
  332  */
  333 #define SCTP_NO_FR_UNLESS_SEGMENT_SMALLER 1
  334 
  335 /* default max I can burst out after a fast retransmit, 0 disables it */
  336 #define SCTP_DEF_MAX_BURST 4
  337 #define SCTP_DEF_HBMAX_BURST 4
  338 #define SCTP_DEF_FRMAX_BURST 4
  339 
  340 /* RTO calculation flag to say if it
  341  * is safe to determine local lan or not.
  342  */
  343 #define SCTP_RTT_FROM_NON_DATA 0
  344 #define SCTP_RTT_FROM_DATA     1
  345 
  346 
  347 /* IP hdr (20/40) + 12+2+2 (enet) + sctp common 12 */
  348 #define SCTP_FIRST_MBUF_RESV 68
  349 /* Packet transmit states in the sent field */
  350 #define SCTP_DATAGRAM_UNSENT            0
  351 #define SCTP_DATAGRAM_SENT              1
  352 #define SCTP_DATAGRAM_RESEND1           2       /* not used (in code, but may
  353                                                  * hit this value) */
  354 #define SCTP_DATAGRAM_RESEND2           3       /* not used (in code, but may
  355                                                  * hit this value) */
  356 #define SCTP_DATAGRAM_RESEND            4
  357 #define SCTP_DATAGRAM_ACKED             10010
  358 #define SCTP_DATAGRAM_MARKED            20010
  359 #define SCTP_FORWARD_TSN_SKIP           30010
  360 #define SCTP_DATAGRAM_NR_ACKED          40010
  361 
  362 /* chunk output send from locations */
  363 #define SCTP_OUTPUT_FROM_USR_SEND       0
  364 #define SCTP_OUTPUT_FROM_T3             1
  365 #define SCTP_OUTPUT_FROM_INPUT_ERROR    2
  366 #define SCTP_OUTPUT_FROM_CONTROL_PROC   3
  367 #define SCTP_OUTPUT_FROM_SACK_TMR       4
  368 #define SCTP_OUTPUT_FROM_SHUT_TMR       5
  369 #define SCTP_OUTPUT_FROM_HB_TMR         6
  370 #define SCTP_OUTPUT_FROM_SHUT_ACK_TMR   7
  371 #define SCTP_OUTPUT_FROM_ASCONF_TMR     8
  372 #define SCTP_OUTPUT_FROM_STRRST_TMR     9
  373 #define SCTP_OUTPUT_FROM_AUTOCLOSE_TMR  10
  374 #define SCTP_OUTPUT_FROM_EARLY_FR_TMR   11
  375 #define SCTP_OUTPUT_FROM_STRRST_REQ     12
  376 #define SCTP_OUTPUT_FROM_USR_RCVD       13
  377 #define SCTP_OUTPUT_FROM_COOKIE_ACK     14
  378 #define SCTP_OUTPUT_FROM_DRAIN          15
  379 #define SCTP_OUTPUT_FROM_CLOSING        16
  380 #define SCTP_OUTPUT_FROM_SOCKOPT        17
  381 
  382 /* SCTP chunk types are moved sctp.h for application (NAT, FW) use */
  383 
  384 /* align to 32-bit sizes */
  385 #define SCTP_SIZE32(x)  ((((x) + 3) >> 2) << 2)
  386 
  387 #define IS_SCTP_CONTROL(a) ((a)->chunk_type != SCTP_DATA)
  388 #define IS_SCTP_DATA(a) ((a)->chunk_type == SCTP_DATA)
  389 
  390 
  391 /* SCTP parameter types */
  392 /*************0x0000 series*************/
  393 #define SCTP_HEARTBEAT_INFO             0x0001
  394 #define SCTP_IPV4_ADDRESS               0x0005
  395 #define SCTP_IPV6_ADDRESS               0x0006
  396 #define SCTP_STATE_COOKIE               0x0007
  397 #define SCTP_UNRECOG_PARAM              0x0008
  398 #define SCTP_COOKIE_PRESERVE            0x0009
  399 #define SCTP_HOSTNAME_ADDRESS           0x000b
  400 #define SCTP_SUPPORTED_ADDRTYPE         0x000c
  401 
  402 /* draft-ietf-stewart-tsvwg-strreset-xxx */
  403 #define SCTP_STR_RESET_OUT_REQUEST      0x000d
  404 #define SCTP_STR_RESET_IN_REQUEST       0x000e
  405 #define SCTP_STR_RESET_TSN_REQUEST      0x000f
  406 #define SCTP_STR_RESET_RESPONSE         0x0010
  407 #define SCTP_STR_RESET_ADD_OUT_STREAMS  0x0011
  408 #define SCTP_STR_RESET_ADD_IN_STREAMS   0x0012
  409 
  410 #define SCTP_MAX_RESET_PARAMS 2
  411 #define SCTP_STREAM_RESET_TSN_DELTA    0x1000
  412 
  413 /*************0x4000 series*************/
  414 
  415 /*************0x8000 series*************/
  416 #define SCTP_ECN_CAPABLE                0x8000
  417 
  418 /* draft-ietf-tsvwg-auth-xxx */
  419 #define SCTP_RANDOM                     0x8002
  420 #define SCTP_CHUNK_LIST                 0x8003
  421 #define SCTP_HMAC_LIST                  0x8004
  422 /*
  423  * draft-ietf-tsvwg-addip-sctp-xx param=0x8008  len=0xNNNN Byte | Byte | Byte
  424  * | Byte Byte | Byte ...
  425  *
  426  * Where each byte is a chunk type extension supported. For example, to support
  427  * all chunks one would have (in hex):
  428  *
  429  * 80 01 00 09 C0 C1 80 81 82 00 00 00
  430  *
  431  * Has the parameter. C0 = PR-SCTP    (RFC3758) C1, 80 = ASCONF (addip draft) 81
  432  * = Packet Drop 82 = Stream Reset 83 = Authentication
  433  */
  434 #define SCTP_SUPPORTED_CHUNK_EXT    0x8008
  435 
  436 /*************0xC000 series*************/
  437 #define SCTP_PRSCTP_SUPPORTED           0xc000
  438 /* draft-ietf-tsvwg-addip-sctp */
  439 #define SCTP_ADD_IP_ADDRESS             0xc001
  440 #define SCTP_DEL_IP_ADDRESS             0xc002
  441 #define SCTP_ERROR_CAUSE_IND            0xc003
  442 #define SCTP_SET_PRIM_ADDR              0xc004
  443 #define SCTP_SUCCESS_REPORT             0xc005
  444 #define SCTP_ULP_ADAPTATION             0xc006
  445 /* behave-nat-draft */
  446 #define SCTP_HAS_NAT_SUPPORT            0xc007
  447 #define SCTP_NAT_VTAGS                  0xc008
  448 
  449 /* bits for TOS field */
  450 #define SCTP_ECT0_BIT           0x02
  451 #define SCTP_ECT1_BIT           0x01
  452 #define SCTP_CE_BITS            0x03
  453 
  454 /* below turns off above */
  455 #define SCTP_FLEXIBLE_ADDRESS   0x20
  456 #define SCTP_NO_HEARTBEAT       0x40
  457 
  458 /* mask to get sticky */
  459 #define SCTP_STICKY_OPTIONS_MASK        0x0c
  460 
  461 
  462 /*
  463  * SCTP states for internal state machine
  464  */
  465 #define SCTP_STATE_EMPTY                0x0000
  466 #define SCTP_STATE_INUSE                0x0001
  467 #define SCTP_STATE_COOKIE_WAIT          0x0002
  468 #define SCTP_STATE_COOKIE_ECHOED        0x0004
  469 #define SCTP_STATE_OPEN                 0x0008
  470 #define SCTP_STATE_SHUTDOWN_SENT        0x0010
  471 #define SCTP_STATE_SHUTDOWN_RECEIVED    0x0020
  472 #define SCTP_STATE_SHUTDOWN_ACK_SENT    0x0040
  473 #define SCTP_STATE_SHUTDOWN_PENDING     0x0080
  474 #define SCTP_STATE_CLOSED_SOCKET        0x0100
  475 #define SCTP_STATE_ABOUT_TO_BE_FREED    0x0200
  476 #define SCTP_STATE_PARTIAL_MSG_LEFT     0x0400
  477 #define SCTP_STATE_WAS_ABORTED          0x0800
  478 #define SCTP_STATE_IN_ACCEPT_QUEUE      0x1000
  479 #define SCTP_STATE_MASK                 0x007f
  480 
  481 #define SCTP_GET_STATE(asoc)    ((asoc)->state & SCTP_STATE_MASK)
  482 #define SCTP_SET_STATE(asoc, newstate)  ((asoc)->state = ((asoc)->state & ~SCTP_STATE_MASK) |  newstate)
  483 #define SCTP_CLEAR_SUBSTATE(asoc, substate) ((asoc)->state &= ~substate)
  484 #define SCTP_ADD_SUBSTATE(asoc, substate) ((asoc)->state |= substate)
  485 
  486 /* SCTP reachability state for each address */
  487 #define SCTP_ADDR_REACHABLE             0x001
  488 #define SCTP_ADDR_NO_PMTUD              0x002
  489 #define SCTP_ADDR_NOHB                  0x004
  490 #define SCTP_ADDR_BEING_DELETED         0x008
  491 #define SCTP_ADDR_NOT_IN_ASSOC          0x010
  492 #define SCTP_ADDR_OUT_OF_SCOPE          0x080
  493 #define SCTP_ADDR_UNCONFIRMED           0x200
  494 #define SCTP_ADDR_REQ_PRIMARY           0x400
  495 /* JRS 5/13/07 - Added potentially failed state for CMT PF */
  496 #define SCTP_ADDR_PF                    0x800
  497 
  498 /* bound address types (e.g. valid address types to allow) */
  499 #define SCTP_BOUND_V6           0x01
  500 #define SCTP_BOUND_V4           0x02
  501 
  502 /*
  503  * what is the default number of mbufs in a chain I allow before switching to
  504  * a cluster
  505  */
  506 #define SCTP_DEFAULT_MBUFS_IN_CHAIN 5
  507 
  508 /* How long a cookie lives in milli-seconds */
  509 #define SCTP_DEFAULT_COOKIE_LIFE        60000
  510 
  511 /* Maximum the mapping array will  grow to (TSN mapping array) */
  512 #define SCTP_MAPPING_ARRAY      512
  513 
  514 /* size of the inital malloc on the mapping array */
  515 #define SCTP_INITIAL_MAPPING_ARRAY  16
  516 /* how much we grow the mapping array each call */
  517 #define SCTP_MAPPING_ARRAY_INCR     32
  518 
  519 /*
  520  * Here we define the timer types used by the implementation as arguments in
  521  * the set/get timer type calls.
  522  */
  523 #define SCTP_TIMER_INIT         0
  524 #define SCTP_TIMER_RECV         1
  525 #define SCTP_TIMER_SEND         2
  526 #define SCTP_TIMER_HEARTBEAT    3
  527 #define SCTP_TIMER_PMTU         4
  528 #define SCTP_TIMER_MAXSHUTDOWN  5
  529 #define SCTP_TIMER_SIGNATURE    6
  530 /*
  531  * number of timer types in the base SCTP structure used in the set/get and
  532  * has the base default.
  533  */
  534 #define SCTP_NUM_TMRS   7
  535 
  536 /* timer types */
  537 #define SCTP_TIMER_TYPE_NONE            0
  538 #define SCTP_TIMER_TYPE_SEND            1
  539 #define SCTP_TIMER_TYPE_INIT            2
  540 #define SCTP_TIMER_TYPE_RECV            3
  541 #define SCTP_TIMER_TYPE_SHUTDOWN        4
  542 #define SCTP_TIMER_TYPE_HEARTBEAT       5
  543 #define SCTP_TIMER_TYPE_COOKIE          6
  544 #define SCTP_TIMER_TYPE_NEWCOOKIE       7
  545 #define SCTP_TIMER_TYPE_PATHMTURAISE    8
  546 #define SCTP_TIMER_TYPE_SHUTDOWNACK     9
  547 #define SCTP_TIMER_TYPE_ASCONF          10
  548 #define SCTP_TIMER_TYPE_SHUTDOWNGUARD   11
  549 #define SCTP_TIMER_TYPE_AUTOCLOSE       12
  550 #define SCTP_TIMER_TYPE_EVENTWAKE       13
  551 #define SCTP_TIMER_TYPE_STRRESET        14
  552 #define SCTP_TIMER_TYPE_INPKILL         15
  553 #define SCTP_TIMER_TYPE_ASOCKILL        16
  554 #define SCTP_TIMER_TYPE_ADDR_WQ         17
  555 #define SCTP_TIMER_TYPE_ZERO_COPY       18
  556 #define SCTP_TIMER_TYPE_ZCOPY_SENDQ     19
  557 #define SCTP_TIMER_TYPE_PRIM_DELETED    20
  558 /* add new timers here - and increment LAST */
  559 #define SCTP_TIMER_TYPE_LAST            21
  560 
  561 #define SCTP_IS_TIMER_TYPE_VALID(t)     (((t) > SCTP_TIMER_TYPE_NONE) && \
  562                                          ((t) < SCTP_TIMER_TYPE_LAST))
  563 
  564 
  565 
  566 /* max number of TSN's dup'd that I will hold */
  567 #define SCTP_MAX_DUP_TSNS       20
  568 
  569 /*
  570  * Here we define the types used when setting the retry amounts.
  571  */
  572 /* How many drop re-attempts we make on  INIT/COOKIE-ECHO */
  573 #define SCTP_RETRY_DROPPED_THRESH 4
  574 
  575 /*
  576  * Maxmium number of chunks a single association can have on it. Note that
  577  * this is a squishy number since the count can run over this if the user
  578  * sends a large message down .. the fragmented chunks don't count until
  579  * AFTER the message is on queue.. it would be the next send that blocks
  580  * things. This number will get tuned up at boot in the sctp_init and use the
  581  * number of clusters as a base. This way high bandwidth environments will
  582  * not get impacted by the lower bandwidth sending a bunch of 1 byte chunks
  583  */
  584 #define SCTP_ASOC_MAX_CHUNKS_ON_QUEUE 512
  585 
  586 
  587 /* The conversion from time to ticks and vice versa is done by rounding
  588  * upwards. This way we can test in the code the time to be positive and
  589  * know that this corresponds to a positive number of ticks.
  590  */
  591 #define MSEC_TO_TICKS(x) ((hz == 1000) ? x : ((((x) * hz) + 999) / 1000))
  592 #define TICKS_TO_MSEC(x) ((hz == 1000) ? x : ((((x) * 1000) + (hz - 1)) / hz))
  593 
  594 #define SEC_TO_TICKS(x) ((x) * hz)
  595 #define TICKS_TO_SEC(x) (((x) + (hz - 1)) / hz)
  596 
  597 /*
  598  * Basically the minimum amount of time before I do a early FR. Making this
  599  * value to low will cause duplicate retransmissions.
  600  */
  601 #define SCTP_MINFR_MSEC_TIMER 250
  602 /* The floor this value is allowed to fall to when starting a timer. */
  603 #define SCTP_MINFR_MSEC_FLOOR 20
  604 
  605 /* init timer def = 1 sec */
  606 #define SCTP_INIT_SEC   1
  607 
  608 /* send timer def = 1 seconds */
  609 #define SCTP_SEND_SEC   1
  610 
  611 /* recv timer def = 200ms  */
  612 #define SCTP_RECV_MSEC  200
  613 
  614 /* 30 seconds + RTO (in ms) */
  615 #define SCTP_HB_DEFAULT_MSEC    30000
  616 
  617 /*
  618  * This is how long a secret lives, NOT how long a cookie lives how many
  619  * ticks the current secret will live.
  620  */
  621 #define SCTP_DEFAULT_SECRET_LIFE_SEC 3600
  622 
  623 #define SCTP_RTO_UPPER_BOUND    (60000) /* 60 sec in ms */
  624 #define SCTP_RTO_LOWER_BOUND    (1000)  /* 1 sec is ms */
  625 #define SCTP_RTO_INITIAL        (3000)  /* 3 sec in ms */
  626 
  627 
  628 #define SCTP_INP_KILL_TIMEOUT 20/* number of ms to retry kill of inpcb */
  629 #define SCTP_ASOC_KILL_TIMEOUT 10       /* number of ms to retry kill of inpcb */
  630 
  631 #define SCTP_DEF_MAX_INIT               8
  632 #define SCTP_DEF_MAX_SEND               10
  633 #define SCTP_DEF_MAX_PATH_RTX           5
  634 #define SCTP_DEF_PATH_PF_THRESHOLD      SCTP_DEF_MAX_PATH_RTX
  635 
  636 #define SCTP_DEF_PMTU_RAISE_SEC 600     /* 10 min between raise attempts */
  637 
  638 
  639 /* How many streams I request initally by default */
  640 #define SCTP_OSTREAM_INITIAL 10
  641 #define SCTP_ISTREAM_INITIAL 2048
  642 
  643 /*
  644  * How many smallest_mtu's need to increase before a window update sack is
  645  * sent (should be a power of 2).
  646  */
  647 /* Send window update (incr * this > hiwat). Should be a power of 2 */
  648 #define SCTP_MINIMAL_RWND               (4096)  /* minimal rwnd */
  649 
  650 #define SCTP_ADDRMAX            16
  651 
  652 /* SCTP DEBUG Switch parameters */
  653 #define SCTP_DEBUG_TIMER1       0x00000001
  654 #define SCTP_DEBUG_TIMER2       0x00000002      /* unused */
  655 #define SCTP_DEBUG_TIMER3       0x00000004      /* unused */
  656 #define SCTP_DEBUG_TIMER4       0x00000008
  657 #define SCTP_DEBUG_OUTPUT1      0x00000010
  658 #define SCTP_DEBUG_OUTPUT2      0x00000020
  659 #define SCTP_DEBUG_OUTPUT3      0x00000040
  660 #define SCTP_DEBUG_OUTPUT4      0x00000080
  661 #define SCTP_DEBUG_UTIL1        0x00000100
  662 #define SCTP_DEBUG_UTIL2        0x00000200      /* unused */
  663 #define SCTP_DEBUG_AUTH1        0x00000400
  664 #define SCTP_DEBUG_AUTH2        0x00000800      /* unused */
  665 #define SCTP_DEBUG_INPUT1       0x00001000
  666 #define SCTP_DEBUG_INPUT2       0x00002000
  667 #define SCTP_DEBUG_INPUT3       0x00004000
  668 #define SCTP_DEBUG_INPUT4       0x00008000      /* unused */
  669 #define SCTP_DEBUG_ASCONF1      0x00010000
  670 #define SCTP_DEBUG_ASCONF2      0x00020000
  671 #define SCTP_DEBUG_OUTPUT5      0x00040000      /* unused */
  672 #define SCTP_DEBUG_XXX          0x00080000      /* unused */
  673 #define SCTP_DEBUG_PCB1         0x00100000
  674 #define SCTP_DEBUG_PCB2         0x00200000      /* unused */
  675 #define SCTP_DEBUG_PCB3         0x00400000
  676 #define SCTP_DEBUG_PCB4         0x00800000
  677 #define SCTP_DEBUG_INDATA1      0x01000000
  678 #define SCTP_DEBUG_INDATA2      0x02000000      /* unused */
  679 #define SCTP_DEBUG_INDATA3      0x04000000      /* unused */
  680 #define SCTP_DEBUG_CRCOFFLOAD   0x08000000      /* unused */
  681 #define SCTP_DEBUG_USRREQ1      0x10000000      /* unused */
  682 #define SCTP_DEBUG_USRREQ2      0x20000000      /* unused */
  683 #define SCTP_DEBUG_PEEL1        0x40000000
  684 #define SCTP_DEBUG_XXXXX        0x80000000      /* unused */
  685 #define SCTP_DEBUG_ALL          0x7ff3ffff
  686 #define SCTP_DEBUG_NOISY        0x00040000
  687 
  688 /* What sender needs to see to avoid SWS or we consider peers rwnd 0 */
  689 #define SCTP_SWS_SENDER_DEF     1420
  690 
  691 /*
  692  * SWS is scaled to the sb_hiwat of the socket. A value of 2 is hiwat/4, 1
  693  * would be hiwat/2 etc.
  694  */
  695 /* What receiver needs to see in sockbuf or we tell peer its 1 */
  696 #define SCTP_SWS_RECEIVER_DEF   3000
  697 
  698 #define SCTP_INITIAL_CWND 4380
  699 
  700 #define SCTP_DEFAULT_MTU 1500   /* emergency default MTU */
  701 /* amount peer is obligated to have in rwnd or I will abort */
  702 #define SCTP_MIN_RWND   1500
  703 
  704 #define SCTP_DEFAULT_MAXSEGMENT 65535
  705 
  706 #define SCTP_CHUNK_BUFFER_SIZE  512
  707 #define SCTP_PARAM_BUFFER_SIZE  512
  708 
  709 /* small chunk store for looking at chunk_list in auth */
  710 #define SCTP_SMALL_CHUNK_STORE 260
  711 
  712 #define SCTP_HOW_MANY_SECRETS   2       /* how many secrets I keep */
  713 
  714 #define SCTP_NUMBER_OF_SECRETS  8       /* or 8 * 4 = 32 octets */
  715 #define SCTP_SECRET_SIZE        32      /* number of octets in a 256 bits */
  716 
  717 
  718 /*
  719  * SCTP upper layer notifications
  720  */
  721 #define SCTP_NOTIFY_ASSOC_UP                     1
  722 #define SCTP_NOTIFY_ASSOC_DOWN                   2
  723 #define SCTP_NOTIFY_INTERFACE_DOWN               3
  724 #define SCTP_NOTIFY_INTERFACE_UP                 4
  725 #define SCTP_NOTIFY_SENT_DG_FAIL                 5
  726 #define SCTP_NOTIFY_UNSENT_DG_FAIL               6
  727 #define SCTP_NOTIFY_SPECIAL_SP_FAIL              7
  728 #define SCTP_NOTIFY_ASSOC_LOC_ABORTED            8
  729 #define SCTP_NOTIFY_ASSOC_REM_ABORTED            9
  730 #define SCTP_NOTIFY_ASSOC_RESTART               10
  731 #define SCTP_NOTIFY_PEER_SHUTDOWN               11
  732 #define SCTP_NOTIFY_ASCONF_ADD_IP               12
  733 #define SCTP_NOTIFY_ASCONF_DELETE_IP            13
  734 #define SCTP_NOTIFY_ASCONF_SET_PRIMARY          14
  735 #define SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION 15
  736 #define SCTP_NOTIFY_INTERFACE_CONFIRMED         16
  737 #define SCTP_NOTIFY_STR_RESET_RECV              17
  738 #define SCTP_NOTIFY_STR_RESET_SEND              18
  739 #define SCTP_NOTIFY_STR_RESET_FAILED_OUT        19
  740 #define SCTP_NOTIFY_STR_RESET_FAILED_IN         20
  741 #define SCTP_NOTIFY_STR_RESET_DENIED_OUT        21
  742 #define SCTP_NOTIFY_STR_RESET_DENIED_IN         22
  743 #define SCTP_NOTIFY_AUTH_NEW_KEY                23
  744 #define SCTP_NOTIFY_AUTH_FREE_KEY               24
  745 #define SCTP_NOTIFY_NO_PEER_AUTH                25
  746 #define SCTP_NOTIFY_SENDER_DRY                  26
  747 #define SCTP_NOTIFY_REMOTE_ERROR                27
  748 
  749 /* This is the value for messages that are NOT completely
  750  * copied down where we will start to split the message.
  751  * So, with our default, we split only if the piece we
  752  * want to take will fill up a full MTU (assuming
  753  * a 1500 byte MTU).
  754  */
  755 #define SCTP_DEFAULT_SPLIT_POINT_MIN 2904
  756 
  757 /* Maximum length of diagnostic information in error causes */
  758 #define SCTP_DIAG_INFO_LEN 64
  759 
  760 /* ABORT CODES and other tell-tale location
  761  * codes are generated by adding the below
  762  * to the instance id.
  763  */
  764 
  765 /* File defines */
  766 #define SCTP_FROM_SCTP_INPUT        0x10000000
  767 #define SCTP_FROM_SCTP_PCB          0x20000000
  768 #define SCTP_FROM_SCTP_INDATA       0x30000000
  769 #define SCTP_FROM_SCTP_TIMER        0x40000000
  770 #define SCTP_FROM_SCTP_USRREQ       0x50000000
  771 #define SCTP_FROM_SCTPUTIL          0x60000000
  772 #define SCTP_FROM_SCTP6_USRREQ      0x70000000
  773 #define SCTP_FROM_SCTP_ASCONF       0x80000000
  774 #define SCTP_FROM_SCTP_OUTPUT       0x90000000
  775 #define SCTP_FROM_SCTP_PEELOFF      0xa0000000
  776 #define SCTP_FROM_SCTP_PANDA        0xb0000000
  777 #define SCTP_FROM_SCTP_SYSCTL       0xc0000000
  778 #define SCTP_FROM_SCTP_CC_FUNCTIONS 0xd0000000
  779 
  780 /* Location ID's */
  781 #define SCTP_LOC_1  0x00000001
  782 #define SCTP_LOC_2  0x00000002
  783 #define SCTP_LOC_3  0x00000003
  784 #define SCTP_LOC_4  0x00000004
  785 #define SCTP_LOC_5  0x00000005
  786 #define SCTP_LOC_6  0x00000006
  787 #define SCTP_LOC_7  0x00000007
  788 #define SCTP_LOC_8  0x00000008
  789 #define SCTP_LOC_9  0x00000009
  790 #define SCTP_LOC_10 0x0000000a
  791 #define SCTP_LOC_11 0x0000000b
  792 #define SCTP_LOC_12 0x0000000c
  793 #define SCTP_LOC_13 0x0000000d
  794 #define SCTP_LOC_14 0x0000000e
  795 #define SCTP_LOC_15 0x0000000f
  796 #define SCTP_LOC_16 0x00000010
  797 #define SCTP_LOC_17 0x00000011
  798 #define SCTP_LOC_18 0x00000012
  799 #define SCTP_LOC_19 0x00000013
  800 #define SCTP_LOC_20 0x00000014
  801 #define SCTP_LOC_21 0x00000015
  802 #define SCTP_LOC_22 0x00000016
  803 #define SCTP_LOC_23 0x00000017
  804 #define SCTP_LOC_24 0x00000018
  805 #define SCTP_LOC_25 0x00000019
  806 #define SCTP_LOC_26 0x0000001a
  807 #define SCTP_LOC_27 0x0000001b
  808 #define SCTP_LOC_28 0x0000001c
  809 #define SCTP_LOC_29 0x0000001d
  810 #define SCTP_LOC_30 0x0000001e
  811 #define SCTP_LOC_31 0x0000001f
  812 #define SCTP_LOC_32 0x00000020
  813 #define SCTP_LOC_33 0x00000021
  814 #define SCTP_LOC_34 0x00000022
  815 #define SCTP_LOC_35 0x00000023
  816 
  817 
  818 /* Free assoc codes */
  819 #define SCTP_NORMAL_PROC      0
  820 #define SCTP_PCBFREE_NOFORCE  1
  821 #define SCTP_PCBFREE_FORCE    2
  822 
  823 /* From codes for adding addresses */
  824 #define SCTP_ADDR_IS_CONFIRMED 8
  825 #define SCTP_ADDR_DYNAMIC_ADDED 6
  826 #define SCTP_IN_COOKIE_PROC 100
  827 #define SCTP_ALLOC_ASOC  1
  828 #define SCTP_LOAD_ADDR_2 2
  829 #define SCTP_LOAD_ADDR_3 3
  830 #define SCTP_LOAD_ADDR_4 4
  831 #define SCTP_LOAD_ADDR_5 5
  832 
  833 #define SCTP_DONOT_SETSCOPE 0
  834 #define SCTP_DO_SETSCOPE 1
  835 
  836 
  837 /* This value determines the default for when
  838  * we try to add more on the send queue., if
  839  * there is room. This prevents us from cycling
  840  * into the copy_resume routine to often if
  841  * we have not got enough space to add a decent
  842  * enough size message. Note that if we have enough
  843  * space to complete the message copy we will always
  844  * add to the message, no matter what the size. Its
  845  * only when we reach the point that we have some left
  846  * to add, there is only room for part of it that we
  847  * will use this threshold. Its also a sysctl.
  848  */
  849 #define SCTP_DEFAULT_ADD_MORE 1452
  850 
  851 #ifndef SCTP_PCBHASHSIZE
  852 /* default number of association hash buckets in each endpoint */
  853 #define SCTP_PCBHASHSIZE 256
  854 #endif
  855 #ifndef SCTP_TCBHASHSIZE
  856 #define SCTP_TCBHASHSIZE 1024
  857 #endif
  858 
  859 #ifndef SCTP_CHUNKQUEUE_SCALE
  860 #define SCTP_CHUNKQUEUE_SCALE 10
  861 #endif
  862 
  863 /* clock variance is 1 ms */
  864 #define SCTP_CLOCK_GRANULARITY  1
  865 #define IP_HDR_SIZE 40          /* we use the size of a IP6 header here this
  866                                  * detracts a small amount for ipv4 but it
  867                                  * simplifies the ipv6 addition */
  868 
  869 /* Argument magic number for sctp_inpcb_free() */
  870 
  871 /* third argument */
  872 #define SCTP_CALLED_DIRECTLY_NOCMPSET     0
  873 #define SCTP_CALLED_AFTER_CMPSET_OFCLOSE  1
  874 #define SCTP_CALLED_FROM_INPKILL_TIMER    2
  875 /* second argument */
  876 #define SCTP_FREE_SHOULD_USE_ABORT          1
  877 #define SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE 0
  878 
  879 #ifndef IPPROTO_SCTP
  880 #define IPPROTO_SCTP 132        /* the Official IANA number :-) */
  881 #endif                          /* !IPPROTO_SCTP */
  882 
  883 #define SCTP_MAX_DATA_BUNDLING          256
  884 
  885 /* modular comparison */
  886 /* See RFC 1982 for details. */
  887 #define SCTP_SSN_GT(a, b) (((a < b) && ((uint16_t)(b - a) > (1U<<15))) || \
  888                            ((a > b) && ((uint16_t)(a - b) < (1U<<15))))
  889 #define SCTP_SSN_GE(a, b) (SCTP_SSN_GT(a, b) || (a == b))
  890 #define SCTP_TSN_GT(a, b) (((a < b) && ((uint32_t)(b - a) > (1U<<31))) || \
  891                            ((a > b) && ((uint32_t)(a - b) < (1U<<31))))
  892 #define SCTP_TSN_GE(a, b) (SCTP_TSN_GT(a, b) || (a == b))
  893 
  894 /* Mapping array manipulation routines */
  895 #define SCTP_IS_TSN_PRESENT(arry, gap) ((arry[(gap >> 3)] >> (gap & 0x07)) & 0x01)
  896 #define SCTP_SET_TSN_PRESENT(arry, gap) (arry[(gap >> 3)] |= (0x01 << ((gap & 0x07))))
  897 #define SCTP_UNSET_TSN_PRESENT(arry, gap) (arry[(gap >> 3)] &= ((~(0x01 << ((gap & 0x07)))) & 0xff))
  898 #define SCTP_CALC_TSN_TO_GAP(gap, tsn, mapping_tsn) do { \
  899                         if (tsn >= mapping_tsn) { \
  900                                                 gap = tsn - mapping_tsn; \
  901                                         } else { \
  902                                                 gap = (MAX_TSN - mapping_tsn) + tsn + 1; \
  903                                         } \
  904                   } while (0)
  905 
  906 
  907 #define SCTP_RETRAN_DONE -1
  908 #define SCTP_RETRAN_EXIT -2
  909 
  910 /*
  911  * This value defines the number of vtag block time wait entry's per list
  912  * element.  Each entry will take 2 4 byte ints (and of course the overhead
  913  * of the next pointer as well). Using 15 as an example will yield * ((8 *
  914  * 15) + 8) or 128 bytes of overhead for each timewait block that gets
  915  * initialized. Increasing it to 31 would yeild 256 bytes per block.
  916  */
  917 #define SCTP_NUMBER_IN_VTAG_BLOCK 15
  918 /*
  919  * If we use the STACK option, we have an array of this size head pointers.
  920  * This array is mod'd the with the size to find which bucket and then all
  921  * entries must be searched to see if the tag is in timed wait. If so we
  922  * reject it.
  923  */
  924 #define SCTP_STACK_VTAG_HASH_SIZE   32
  925 
  926 /*
  927  * Number of seconds of time wait for a vtag.
  928  */
  929 #define SCTP_TIME_WAIT 60
  930 
  931 /* How many micro seconds is the cutoff from
  932  * local lan type rtt's
  933  */
  934  /*
  935   * We allow 900us for the rtt.
  936   */
  937 #define SCTP_LOCAL_LAN_RTT 900
  938 #define SCTP_LAN_UNKNOWN  0
  939 #define SCTP_LAN_LOCAL    1
  940 #define SCTP_LAN_INTERNET 2
  941 
  942 #define SCTP_SEND_BUFFER_SPLITTING 0x00000001
  943 #define SCTP_RECV_BUFFER_SPLITTING 0x00000002
  944 
  945 /* The system retains a cache of free chunks such to
  946  * cut down on calls the memory allocation system. There
  947  * is a per association limit of free items and a overall
  948  * system limit. If either one gets hit then the resource
  949  * stops being cached.
  950  */
  951 
  952 #define SCTP_DEF_ASOC_RESC_LIMIT 10
  953 #define SCTP_DEF_SYSTEM_RESC_LIMIT 1000
  954 
  955 /*-
  956  * defines for socket lock states.
  957  * Used by __APPLE__ and SCTP_SO_LOCK_TESTING
  958  */
  959 #define SCTP_SO_LOCKED          1
  960 #define SCTP_SO_NOT_LOCKED      0
  961 
  962 
  963 #define SCTP_HOLDS_LOCK 1
  964 #define SCTP_NOT_LOCKED 0
  965 
  966 /*-
  967  * For address locks, do we hold the lock?
  968  */
  969 #define SCTP_ADDR_LOCKED 1
  970 #define SCTP_ADDR_NOT_LOCKED 0
  971 
  972 #define IN4_ISPRIVATE_ADDRESS(a) \
  973    ((((uint8_t *)&(a)->s_addr)[0] == 10) || \
  974     ((((uint8_t *)&(a)->s_addr)[0] == 172) && \
  975      (((uint8_t *)&(a)->s_addr)[1] >= 16) && \
  976      (((uint8_t *)&(a)->s_addr)[1] <= 32)) || \
  977     ((((uint8_t *)&(a)->s_addr)[0] == 192) && \
  978      (((uint8_t *)&(a)->s_addr)[1] == 168)))
  979 
  980 #define IN4_ISLOOPBACK_ADDRESS(a) \
  981     (((uint8_t *)&(a)->s_addr)[0] == 127)
  982 
  983 #define IN4_ISLINKLOCAL_ADDRESS(a) \
  984     ((((uint8_t *)&(a)->s_addr)[0] == 169) && \
  985      (((uint8_t *)&(a)->s_addr)[1] == 254))
  986 
  987 
  988 #if defined(_KERNEL)
  989 #define SCTP_GETTIME_TIMEVAL(x) (getmicrouptime(x))
  990 #define SCTP_GETPTIME_TIMEVAL(x) (microuptime(x))
  991 #endif
  992 
  993 #if defined(_KERNEL) || defined(__Userspace__)
  994 #define sctp_sowwakeup(inp, so) \
  995 do { \
  996         if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
  997                 inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEOUTPUT; \
  998         } else { \
  999                 sowwakeup(so); \
 1000         } \
 1001 } while (0)
 1002 
 1003 #define sctp_sowwakeup_locked(inp, so) \
 1004 do { \
 1005         if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
 1006                 SOCKBUF_UNLOCK(&((so)->so_snd)); \
 1007                 inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEOUTPUT; \
 1008         } else { \
 1009                 sowwakeup_locked(so); \
 1010         } \
 1011 } while (0)
 1012 
 1013 #define sctp_sorwakeup(inp, so) \
 1014 do { \
 1015         if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
 1016                 inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEINPUT; \
 1017         } else { \
 1018                 sorwakeup(so); \
 1019         } \
 1020 } while (0)
 1021 
 1022 #define sctp_sorwakeup_locked(inp, so) \
 1023 do { \
 1024         if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { \
 1025                 inp->sctp_flags |= SCTP_PCB_FLAGS_WAKEINPUT; \
 1026                 SOCKBUF_UNLOCK(&((so)->so_rcv)); \
 1027         } else { \
 1028                 sorwakeup_locked(so); \
 1029         } \
 1030 } while (0)
 1031 
 1032 #endif                          /* _KERNEL || __Userspace__ */
 1033 #endif

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