The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2001-2007, 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/10.2/sys/netinet/sctp_header.h 273275 2014-10-19 11:31:23Z tuexen $");
   35 
   36 #ifndef _NETINET_SCTP_HEADER_H_
   37 #define _NETINET_SCTP_HEADER_H_
   38 
   39 #include <sys/time.h>
   40 #include <netinet/sctp.h>
   41 #include <netinet/sctp_constants.h>
   42 
   43 #define SCTP_PACKED __attribute__((packed))
   44 
   45 /*
   46  * Parameter structures
   47  */
   48 struct sctp_ipv4addr_param {
   49         struct sctp_paramhdr ph;/* type=SCTP_IPV4_PARAM_TYPE, len=8 */
   50         uint32_t addr;          /* IPV4 address */
   51 }                   SCTP_PACKED;
   52 
   53 #define SCTP_V6_ADDR_BYTES 16
   54 
   55 
   56 struct sctp_ipv6addr_param {
   57         struct sctp_paramhdr ph;/* type=SCTP_IPV6_PARAM_TYPE, len=20 */
   58         uint8_t addr[SCTP_V6_ADDR_BYTES];       /* IPV6 address */
   59 }                   SCTP_PACKED;
   60 
   61 /* Cookie Preservative */
   62 struct sctp_cookie_perserve_param {
   63         struct sctp_paramhdr ph;/* type=SCTP_COOKIE_PRESERVE, len=8 */
   64         uint32_t time;          /* time in ms to extend cookie */
   65 }                          SCTP_PACKED;
   66 
   67 #define SCTP_ARRAY_MIN_LEN 1
   68 /* Host Name Address */
   69 struct sctp_host_name_param {
   70         struct sctp_paramhdr ph;/* type=SCTP_HOSTNAME_ADDRESS */
   71         char name[SCTP_ARRAY_MIN_LEN];  /* host name */
   72 }                    SCTP_PACKED;
   73 
   74 /*
   75  * This is the maximum padded size of a s-a-p
   76  * so paramheadr + 3 address types (6 bytes) + 2 byte pad = 12
   77  */
   78 #define SCTP_MAX_ADDR_PARAMS_SIZE 12
   79 /* supported address type */
   80 struct sctp_supported_addr_param {
   81         struct sctp_paramhdr ph;/* type=SCTP_SUPPORTED_ADDRTYPE */
   82         uint16_t addr_type[2];  /* array of supported address types */
   83 }                         SCTP_PACKED;
   84 
   85 /* heartbeat info parameter */
   86 struct sctp_heartbeat_info_param {
   87         struct sctp_paramhdr ph;
   88         uint32_t time_value_1;
   89         uint32_t time_value_2;
   90         uint32_t random_value1;
   91         uint32_t random_value2;
   92         uint8_t addr_family;
   93         uint8_t addr_len;
   94         /* make sure that this structure is 4 byte aligned */
   95         uint8_t padding[2];
   96         char address[SCTP_ADDRMAX];
   97 }                         SCTP_PACKED;
   98 
   99 
  100 /* draft-ietf-tsvwg-prsctp */
  101 /* PR-SCTP supported parameter */
  102 struct sctp_prsctp_supported_param {
  103         struct sctp_paramhdr ph;
  104 }                           SCTP_PACKED;
  105 
  106 
  107 /* draft-ietf-tsvwg-addip-sctp */
  108 struct sctp_asconf_paramhdr {   /* an ASCONF "parameter" */
  109         struct sctp_paramhdr ph;/* a SCTP parameter header */
  110         uint32_t correlation_id;/* correlation id for this param */
  111 }                    SCTP_PACKED;
  112 
  113 struct sctp_asconf_addr_param { /* an ASCONF address parameter */
  114         struct sctp_asconf_paramhdr aph;        /* asconf "parameter" */
  115         struct sctp_ipv6addr_param addrp;       /* max storage size */
  116 }                      SCTP_PACKED;
  117 
  118 
  119 struct sctp_asconf_tag_param {  /* an ASCONF NAT-Vtag parameter */
  120         struct sctp_asconf_paramhdr aph;        /* asconf "parameter" */
  121         uint32_t local_vtag;
  122         uint32_t remote_vtag;
  123 }                     SCTP_PACKED;
  124 
  125 
  126 struct sctp_asconf_addrv4_param {       /* an ASCONF address (v4) parameter */
  127         struct sctp_asconf_paramhdr aph;        /* asconf "parameter" */
  128         struct sctp_ipv4addr_param addrp;       /* max storage size */
  129 }                        SCTP_PACKED;
  130 
  131 #define SCTP_MAX_SUPPORTED_EXT 256
  132 
  133 struct sctp_supported_chunk_types_param {
  134         struct sctp_paramhdr ph;/* type = 0x8008  len = x */
  135         uint8_t chunk_types[];
  136 }                                SCTP_PACKED;
  137 
  138 
  139 /*
  140  * Structures for DATA chunks
  141  */
  142 struct sctp_data {
  143         uint32_t tsn;
  144         uint16_t stream_id;
  145         uint16_t stream_sequence;
  146         uint32_t protocol_id;
  147         /* user data follows */
  148 }         SCTP_PACKED;
  149 
  150 struct sctp_data_chunk {
  151         struct sctp_chunkhdr ch;
  152         struct sctp_data dp;
  153 }               SCTP_PACKED;
  154 
  155 /*
  156  * Structures for the control chunks
  157  */
  158 
  159 /* Initiate (INIT)/Initiate Ack (INIT ACK) */
  160 struct sctp_init {
  161         uint32_t initiate_tag;  /* initiate tag */
  162         uint32_t a_rwnd;        /* a_rwnd */
  163         uint16_t num_outbound_streams;  /* OS */
  164         uint16_t num_inbound_streams;   /* MIS */
  165         uint32_t initial_tsn;   /* I-TSN */
  166         /* optional param's follow */
  167 }         SCTP_PACKED;
  168 
  169 #define SCTP_IDENTIFICATION_SIZE 16
  170 #define SCTP_ADDRESS_SIZE 4
  171 #define SCTP_RESERVE_SPACE 6
  172 /* state cookie header */
  173 struct sctp_state_cookie {      /* this is our definition... */
  174         uint8_t identification[SCTP_IDENTIFICATION_SIZE];       /* id of who we are */
  175         struct timeval time_entered;    /* the time I built cookie */
  176         uint32_t cookie_life;   /* life I will award this cookie */
  177         uint32_t tie_tag_my_vtag;       /* my tag in old association */
  178 
  179         uint32_t tie_tag_peer_vtag;     /* peers tag in old association */
  180         uint32_t peers_vtag;    /* peers tag in INIT (for quick ref) */
  181 
  182         uint32_t my_vtag;       /* my tag in INIT-ACK (for quick ref) */
  183         uint32_t address[SCTP_ADDRESS_SIZE];    /* 4 ints/128 bits */
  184         uint32_t addr_type;     /* address type */
  185         uint32_t laddress[SCTP_ADDRESS_SIZE];   /* my local from address */
  186         uint32_t laddr_type;    /* my local from address type */
  187         uint32_t scope_id;      /* v6 scope id for link-locals */
  188 
  189         uint16_t peerport;      /* port address of the peer in the INIT */
  190         uint16_t myport;        /* my port address used in the INIT */
  191         uint8_t ipv4_addr_legal;/* Are V4 addr legal? */
  192         uint8_t ipv6_addr_legal;/* Are V6 addr legal? */
  193         uint8_t local_scope;    /* IPv6 local scope flag */
  194         uint8_t site_scope;     /* IPv6 site scope flag */
  195 
  196         uint8_t ipv4_scope;     /* IPv4 private addr scope */
  197         uint8_t loopback_scope; /* loopback scope information */
  198         uint8_t reserved[SCTP_RESERVE_SPACE];   /* Align to 64 bits */
  199         /*
  200          * at the end is tacked on the INIT chunk and the INIT-ACK chunk
  201          * (minus the cookie).
  202          */
  203 }                 SCTP_PACKED;
  204 
  205 
  206 /* Used for NAT state error cause */
  207 struct sctp_missing_nat_state {
  208         uint16_t cause;
  209         uint16_t length;
  210         uint8_t data[];
  211 }                      SCTP_PACKED;
  212 
  213 
  214 struct sctp_inv_mandatory_param {
  215         uint16_t cause;
  216         uint16_t length;
  217         uint32_t num_param;
  218         uint16_t param;
  219         /*
  220          * We include this to 0 it since only a missing cookie will cause
  221          * this error.
  222          */
  223         uint16_t resv;
  224 }                        SCTP_PACKED;
  225 
  226 struct sctp_unresolv_addr {
  227         uint16_t cause;
  228         uint16_t length;
  229         uint16_t addr_type;
  230         uint16_t reserved;      /* Only one invalid addr type */
  231 }                  SCTP_PACKED;
  232 
  233 /* state cookie parameter */
  234 struct sctp_state_cookie_param {
  235         struct sctp_paramhdr ph;
  236         struct sctp_state_cookie cookie;
  237 }                       SCTP_PACKED;
  238 
  239 struct sctp_init_chunk {
  240         struct sctp_chunkhdr ch;
  241         struct sctp_init init;
  242 }               SCTP_PACKED;
  243 
  244 struct sctp_init_msg {
  245         struct sctphdr sh;
  246         struct sctp_init_chunk msg;
  247 }             SCTP_PACKED;
  248 
  249 /* ... used for both INIT and INIT ACK */
  250 #define sctp_init_ack           sctp_init
  251 #define sctp_init_ack_chunk     sctp_init_chunk
  252 #define sctp_init_ack_msg       sctp_init_msg
  253 
  254 
  255 /* Selective Ack (SACK) */
  256 struct sctp_gap_ack_block {
  257         uint16_t start;         /* Gap Ack block start */
  258         uint16_t end;           /* Gap Ack block end */
  259 }                  SCTP_PACKED;
  260 
  261 struct sctp_sack {
  262         uint32_t cum_tsn_ack;   /* cumulative TSN Ack */
  263         uint32_t a_rwnd;        /* updated a_rwnd of sender */
  264         uint16_t num_gap_ack_blks;      /* number of Gap Ack blocks */
  265         uint16_t num_dup_tsns;  /* number of duplicate TSNs */
  266         /* struct sctp_gap_ack_block's follow */
  267         /* uint32_t duplicate_tsn's follow */
  268 }         SCTP_PACKED;
  269 
  270 struct sctp_sack_chunk {
  271         struct sctp_chunkhdr ch;
  272         struct sctp_sack sack;
  273 }               SCTP_PACKED;
  274 
  275 struct sctp_nr_sack {
  276         uint32_t cum_tsn_ack;   /* cumulative TSN Ack */
  277         uint32_t a_rwnd;        /* updated a_rwnd of sender */
  278         uint16_t num_gap_ack_blks;      /* number of Gap Ack blocks */
  279         uint16_t num_nr_gap_ack_blks;   /* number of NR Gap Ack blocks */
  280         uint16_t num_dup_tsns;  /* number of duplicate TSNs */
  281         uint16_t reserved;      /* not currently used */
  282         /* struct sctp_gap_ack_block's follow */
  283         /* uint32_t duplicate_tsn's follow */
  284 }            SCTP_PACKED;
  285 
  286 struct sctp_nr_sack_chunk {
  287         struct sctp_chunkhdr ch;
  288         struct sctp_nr_sack nr_sack;
  289 }                  SCTP_PACKED;
  290 
  291 
  292 /* Heartbeat Request (HEARTBEAT) */
  293 struct sctp_heartbeat {
  294         struct sctp_heartbeat_info_param hb_info;
  295 }              SCTP_PACKED;
  296 
  297 struct sctp_heartbeat_chunk {
  298         struct sctp_chunkhdr ch;
  299         struct sctp_heartbeat heartbeat;
  300 }                    SCTP_PACKED;
  301 
  302 /* ... used for Heartbeat Ack (HEARTBEAT ACK) */
  303 #define sctp_heartbeat_ack              sctp_heartbeat
  304 #define sctp_heartbeat_ack_chunk        sctp_heartbeat_chunk
  305 
  306 
  307 /* Abort Asssociation (ABORT) */
  308 struct sctp_abort_chunk {
  309         struct sctp_chunkhdr ch;
  310         /* optional error cause may follow */
  311 }                SCTP_PACKED;
  312 
  313 struct sctp_abort_msg {
  314         struct sctphdr sh;
  315         struct sctp_abort_chunk msg;
  316 }              SCTP_PACKED;
  317 
  318 
  319 /* Shutdown Association (SHUTDOWN) */
  320 struct sctp_shutdown_chunk {
  321         struct sctp_chunkhdr ch;
  322         uint32_t cumulative_tsn_ack;
  323 }                   SCTP_PACKED;
  324 
  325 
  326 /* Shutdown Acknowledgment (SHUTDOWN ACK) */
  327 struct sctp_shutdown_ack_chunk {
  328         struct sctp_chunkhdr ch;
  329 }                       SCTP_PACKED;
  330 
  331 
  332 /* Operation Error (ERROR) */
  333 struct sctp_error_chunk {
  334         struct sctp_chunkhdr ch;
  335         /* optional error causes follow */
  336 }                SCTP_PACKED;
  337 
  338 
  339 /* Cookie Echo (COOKIE ECHO) */
  340 struct sctp_cookie_echo_chunk {
  341         struct sctp_chunkhdr ch;
  342         struct sctp_state_cookie cookie;
  343 }                      SCTP_PACKED;
  344 
  345 /* Cookie Acknowledgment (COOKIE ACK) */
  346 struct sctp_cookie_ack_chunk {
  347         struct sctp_chunkhdr ch;
  348 }                     SCTP_PACKED;
  349 
  350 /* Explicit Congestion Notification Echo (ECNE) */
  351 struct old_sctp_ecne_chunk {
  352         struct sctp_chunkhdr ch;
  353         uint32_t tsn;
  354 }                   SCTP_PACKED;
  355 
  356 struct sctp_ecne_chunk {
  357         struct sctp_chunkhdr ch;
  358         uint32_t tsn;
  359         uint32_t num_pkts_since_cwr;
  360 }               SCTP_PACKED;
  361 
  362 /* Congestion Window Reduced (CWR) */
  363 struct sctp_cwr_chunk {
  364         struct sctp_chunkhdr ch;
  365         uint32_t tsn;
  366 }              SCTP_PACKED;
  367 
  368 /* Shutdown Complete (SHUTDOWN COMPLETE) */
  369 struct sctp_shutdown_complete_chunk {
  370         struct sctp_chunkhdr ch;
  371 }                            SCTP_PACKED;
  372 
  373 /* Oper error holding a stale cookie */
  374 struct sctp_stale_cookie_msg {
  375         struct sctp_paramhdr ph;/* really an error cause */
  376         uint32_t time_usec;
  377 }                     SCTP_PACKED;
  378 
  379 struct sctp_adaptation_layer_indication {
  380         struct sctp_paramhdr ph;
  381         uint32_t indication;
  382 }                                SCTP_PACKED;
  383 
  384 struct sctp_cookie_while_shutting_down {
  385         struct sctphdr sh;
  386         struct sctp_chunkhdr ch;
  387         struct sctp_paramhdr ph;/* really an error cause */
  388 }                               SCTP_PACKED;
  389 
  390 struct sctp_shutdown_complete_msg {
  391         struct sctphdr sh;
  392         struct sctp_shutdown_complete_chunk shut_cmp;
  393 }                          SCTP_PACKED;
  394 
  395 /*
  396  * draft-ietf-tsvwg-addip-sctp
  397  */
  398 /* Address/Stream Configuration Change (ASCONF) */
  399 struct sctp_asconf_chunk {
  400         struct sctp_chunkhdr ch;
  401         uint32_t serial_number;
  402         /* lookup address parameter (mandatory) */
  403         /* asconf parameters follow */
  404 }                 SCTP_PACKED;
  405 
  406 /* Address/Stream Configuration Acknowledge (ASCONF ACK) */
  407 struct sctp_asconf_ack_chunk {
  408         struct sctp_chunkhdr ch;
  409         uint32_t serial_number;
  410         /* asconf parameters follow */
  411 }                     SCTP_PACKED;
  412 
  413 /* draft-ietf-tsvwg-prsctp */
  414 /* Forward Cumulative TSN (FORWARD TSN) */
  415 struct sctp_forward_tsn_chunk {
  416         struct sctp_chunkhdr ch;
  417         uint32_t new_cumulative_tsn;
  418         /* stream/sequence pairs (sctp_strseq) follow */
  419 }                      SCTP_PACKED;
  420 
  421 struct sctp_strseq {
  422         uint16_t stream;
  423         uint16_t sequence;
  424 }           SCTP_PACKED;
  425 
  426 struct sctp_forward_tsn_msg {
  427         struct sctphdr sh;
  428         struct sctp_forward_tsn_chunk msg;
  429 }                    SCTP_PACKED;
  430 
  431 /* should be a multiple of 4 - 1 aka 3/7/11 etc. */
  432 
  433 #define SCTP_NUM_DB_TO_VERIFY 31
  434 
  435 struct sctp_chunk_desc {
  436         uint8_t chunk_type;
  437         uint8_t data_bytes[SCTP_NUM_DB_TO_VERIFY];
  438         uint32_t tsn_ifany;
  439 }               SCTP_PACKED;
  440 
  441 
  442 struct sctp_pktdrop_chunk {
  443         struct sctp_chunkhdr ch;
  444         uint32_t bottle_bw;
  445         uint32_t current_onq;
  446         uint16_t trunc_len;
  447         uint16_t reserved;
  448         uint8_t data[];
  449 }                  SCTP_PACKED;
  450 
  451 /**********STREAM RESET STUFF ******************/
  452 
  453 struct sctp_stream_reset_request {
  454         struct sctp_paramhdr ph;
  455         uint32_t request_seq;
  456 }                         SCTP_PACKED;
  457 
  458 struct sctp_stream_reset_out_request {
  459         struct sctp_paramhdr ph;
  460         uint32_t request_seq;   /* monotonically increasing seq no */
  461         uint32_t response_seq;  /* if a response, the resp seq no */
  462         uint32_t send_reset_at_tsn;     /* last TSN I assigned outbound */
  463         uint16_t list_of_streams[];     /* if not all list of streams */
  464 }                             SCTP_PACKED;
  465 
  466 struct sctp_stream_reset_in_request {
  467         struct sctp_paramhdr ph;
  468         uint32_t request_seq;
  469         uint16_t list_of_streams[];     /* if not all list of streams */
  470 }                            SCTP_PACKED;
  471 
  472 struct sctp_stream_reset_tsn_request {
  473         struct sctp_paramhdr ph;
  474         uint32_t request_seq;
  475 }                             SCTP_PACKED;
  476 
  477 struct sctp_stream_reset_response {
  478         struct sctp_paramhdr ph;
  479         uint32_t response_seq;  /* if a response, the resp seq no */
  480         uint32_t result;
  481 }                          SCTP_PACKED;
  482 
  483 struct sctp_stream_reset_response_tsn {
  484         struct sctp_paramhdr ph;
  485         uint32_t response_seq;  /* if a response, the resp seq no */
  486         uint32_t result;
  487         uint32_t senders_next_tsn;
  488         uint32_t receivers_next_tsn;
  489 }                              SCTP_PACKED;
  490 
  491 struct sctp_stream_reset_add_strm {
  492         struct sctp_paramhdr ph;
  493         uint32_t request_seq;
  494         uint16_t number_of_streams;
  495         uint16_t reserved;
  496 }                          SCTP_PACKED;
  497 
  498 #define SCTP_STREAM_RESET_RESULT_NOTHING_TO_DO   0x00000000     /* XXX: unused */
  499 #define SCTP_STREAM_RESET_RESULT_PERFORMED       0x00000001
  500 #define SCTP_STREAM_RESET_RESULT_DENIED          0x00000002
  501 #define SCTP_STREAM_RESET_RESULT_ERR__WRONG_SSN  0x00000003     /* XXX: unused */
  502 #define SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS 0x00000004
  503 #define SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO   0x00000005
  504 #define SCTP_STREAM_RESET_RESULT_IN_PROGRESS     0x00000006     /* XXX: unused */
  505 
  506 /*
  507  * convience structures, note that if you are making a request for specific
  508  * streams then the request will need to be an overlay structure.
  509  */
  510 
  511 struct sctp_stream_reset_tsn_req {
  512         struct sctp_chunkhdr ch;
  513         struct sctp_stream_reset_tsn_request sr_req;
  514 }                         SCTP_PACKED;
  515 
  516 struct sctp_stream_reset_resp {
  517         struct sctp_chunkhdr ch;
  518         struct sctp_stream_reset_response sr_resp;
  519 }                      SCTP_PACKED;
  520 
  521 /* respone only valid with a TSN request */
  522 struct sctp_stream_reset_resp_tsn {
  523         struct sctp_chunkhdr ch;
  524         struct sctp_stream_reset_response_tsn sr_resp;
  525 }                          SCTP_PACKED;
  526 
  527 /****************************************************/
  528 
  529 /*
  530  * Authenticated chunks support draft-ietf-tsvwg-sctp-auth
  531  */
  532 
  533 /* Should we make the max be 32? */
  534 #define SCTP_RANDOM_MAX_SIZE 256
  535 struct sctp_auth_random {
  536         struct sctp_paramhdr ph;/* type = 0x8002 */
  537         uint8_t random_data[];
  538 }                SCTP_PACKED;
  539 
  540 struct sctp_auth_chunk_list {
  541         struct sctp_paramhdr ph;/* type = 0x8003 */
  542         uint8_t chunk_types[];
  543 }                    SCTP_PACKED;
  544 
  545 struct sctp_auth_hmac_algo {
  546         struct sctp_paramhdr ph;/* type = 0x8004 */
  547         uint16_t hmac_ids[];
  548 }                   SCTP_PACKED;
  549 
  550 struct sctp_auth_chunk {
  551         struct sctp_chunkhdr ch;
  552         uint16_t shared_key_id;
  553         uint16_t hmac_id;
  554         uint8_t hmac[];
  555 }               SCTP_PACKED;
  556 
  557 struct sctp_auth_invalid_hmac {
  558         struct sctp_paramhdr ph;
  559         uint16_t hmac_id;
  560         uint16_t padding;
  561 }                      SCTP_PACKED;
  562 
  563 /*
  564  * we pre-reserve enough room for a ECNE or CWR AND a SACK with no missing
  565  * pieces. If ENCE is missing we could have a couple of blocks. This way we
  566  * optimize so we MOST likely can bundle a SACK/ECN with the smallest size
  567  * data chunk I will split into. We could increase throughput slightly by
  568  * taking out these two but the  24-sack/8-CWR i.e. 32 bytes I pre-reserve I
  569  * feel is worth it for now.
  570  */
  571 #ifndef SCTP_MAX_OVERHEAD
  572 #ifdef INET6
  573 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
  574                            sizeof(struct sctphdr) + \
  575                            sizeof(struct sctp_ecne_chunk) + \
  576                            sizeof(struct sctp_sack_chunk) + \
  577                            sizeof(struct ip6_hdr))
  578 
  579 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
  580                            sizeof(struct sctphdr) + \
  581                            sizeof(struct ip6_hdr))
  582 
  583 
  584 #define SCTP_MIN_OVERHEAD (sizeof(struct ip6_hdr) + \
  585                            sizeof(struct sctphdr))
  586 
  587 #else
  588 #define SCTP_MAX_OVERHEAD (sizeof(struct sctp_data_chunk) + \
  589                            sizeof(struct sctphdr) + \
  590                            sizeof(struct sctp_ecne_chunk) + \
  591                            sizeof(struct sctp_sack_chunk) + \
  592                            sizeof(struct ip))
  593 
  594 #define SCTP_MED_OVERHEAD (sizeof(struct sctp_data_chunk) + \
  595                            sizeof(struct sctphdr) + \
  596                            sizeof(struct ip))
  597 
  598 
  599 #define SCTP_MIN_OVERHEAD (sizeof(struct ip) + \
  600                            sizeof(struct sctphdr))
  601 
  602 #endif                          /* INET6 */
  603 #endif                          /* !SCTP_MAX_OVERHEAD */
  604 
  605 #define SCTP_MED_V4_OVERHEAD (sizeof(struct sctp_data_chunk) + \
  606                               sizeof(struct sctphdr) + \
  607                               sizeof(struct ip))
  608 
  609 #define SCTP_MIN_V4_OVERHEAD (sizeof(struct ip) + \
  610                               sizeof(struct sctphdr))
  611 
  612 #undef SCTP_PACKED
  613 #endif                          /* !__sctp_header_h__ */

Cache object: 8461e2e405eb5cc49657650e4daa41a9


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.