The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_var.h

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    1 /*-
    2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
    3  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
    4  * Copyright (c) 2008-2011, 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 /* $KAME: sctp_var.h,v 1.24 2005/03/06 16:04:19 itojun Exp $     */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD: releng/9.0/sys/netinet/sctp_var.h 224641 2011-08-03 20:21:00Z tuexen $");
   37 
   38 #ifndef _NETINET_SCTP_VAR_H_
   39 #define _NETINET_SCTP_VAR_H_
   40 
   41 #include <netinet/sctp_uio.h>
   42 
   43 #if defined(_KERNEL) || defined(__Userspace__)
   44 
   45 extern struct pr_usrreqs sctp_usrreqs;
   46 
   47 
   48 #define sctp_feature_on(inp, feature)  (inp->sctp_features |= feature)
   49 #define sctp_feature_off(inp, feature) (inp->sctp_features &= ~feature)
   50 #define sctp_is_feature_on(inp, feature) ((inp->sctp_features & feature) == feature)
   51 #define sctp_is_feature_off(inp, feature) ((inp->sctp_features & feature) == 0)
   52 
   53 #define sctp_stcb_feature_on(inp, stcb, feature) {\
   54         if (stcb) { \
   55                 stcb->asoc.sctp_features |= feature; \
   56         } else { \
   57                 inp->sctp_features |= feature; \
   58         } \
   59 }
   60 #define sctp_stcb_feature_off(inp, stcb, feature) {\
   61         if (stcb) { \
   62                 stcb->asoc.sctp_features &= ~feature; \
   63         } else { \
   64                 inp->sctp_features &= ~feature; \
   65         } \
   66 }
   67 #define sctp_stcb_is_feature_on(inp, stcb, feature) \
   68         (((stcb != NULL) && \
   69           ((stcb->asoc.sctp_features & feature) == feature)) || \
   70          ((stcb == NULL) && \
   71           ((inp->sctp_features & feature) == feature)))
   72 #define sctp_stcb_is_feature_off(inp, stcb, feature) \
   73         (((stcb != NULL) && \
   74           ((stcb->asoc.sctp_features & feature) == 0)) || \
   75          ((stcb == NULL) && \
   76           ((inp->sctp_features & feature) == 0)))
   77 
   78 /* managing mobility_feature in inpcb (by micchie) */
   79 #define sctp_mobility_feature_on(inp, feature)  (inp->sctp_mobility_features |= feature)
   80 #define sctp_mobility_feature_off(inp, feature) (inp->sctp_mobility_features &= ~feature)
   81 #define sctp_is_mobility_feature_on(inp, feature) (inp->sctp_mobility_features & feature)
   82 #define sctp_is_mobility_feature_off(inp, feature) ((inp->sctp_mobility_features & feature) == 0)
   83 
   84 #define sctp_maxspace(sb) (max((sb)->sb_hiwat,SCTP_MINIMAL_RWND))
   85 
   86 #define sctp_sbspace(asoc, sb) ((long) ((sctp_maxspace(sb) > (asoc)->sb_cc) ? (sctp_maxspace(sb) - (asoc)->sb_cc) : 0))
   87 
   88 #define sctp_sbspace_failedmsgs(sb) ((long) ((sctp_maxspace(sb) > (sb)->sb_cc) ? (sctp_maxspace(sb) - (sb)->sb_cc) : 0))
   89 
   90 #define sctp_sbspace_sub(a,b) ((a > b) ? (a - b) : 0)
   91 
   92 /*
   93  * I tried to cache the readq entries at one point. But the reality
   94  * is that it did not add any performance since this meant we had to
   95  * lock the STCB on read. And at that point once you have to do an
   96  * extra lock, it really does not matter if the lock is in the ZONE
   97  * stuff or in our code. Note that this same problem would occur with
   98  * an mbuf cache as well so it is not really worth doing, at least
   99  * right now :-D
  100  */
  101 
  102 #define sctp_free_a_readq(_stcb, _readq) { \
  103         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
  104         SCTP_DECR_READQ_COUNT(); \
  105 }
  106 
  107 #define sctp_alloc_a_readq(_stcb, _readq) { \
  108         (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \
  109         if ((_readq)) { \
  110              SCTP_INCR_READQ_COUNT(); \
  111         } \
  112 }
  113 
  114 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \
  115         if ((_strmoq)->holds_key_ref) { \
  116                 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \
  117                 (_strmoq)->holds_key_ref = 0; \
  118         } \
  119         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \
  120         SCTP_DECR_STRMOQ_COUNT(); \
  121 }
  122 
  123 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \
  124         (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \
  125          if ((_strmoq)) {                         \
  126                 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \
  127                 SCTP_INCR_STRMOQ_COUNT(); \
  128                 (_strmoq)->holds_key_ref = 0; \
  129         } \
  130 }
  131 
  132 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \
  133         if ((_chk)->holds_key_ref) {\
  134                 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \
  135                 (_chk)->holds_key_ref = 0; \
  136         } \
  137         if (_stcb) { \
  138           SCTP_TCB_LOCK_ASSERT((_stcb)); \
  139           if ((_chk)->whoTo) { \
  140                   sctp_free_remote_addr((_chk)->whoTo); \
  141                   (_chk)->whoTo = NULL; \
  142           } \
  143           if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \
  144                (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \
  145                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
  146                 SCTP_DECR_CHK_COUNT(); \
  147           } else { \
  148                 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
  149                 (_stcb)->asoc.free_chunk_cnt++; \
  150                 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
  151           } \
  152         } else { \
  153                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
  154                 SCTP_DECR_CHK_COUNT(); \
  155         } \
  156 }
  157 
  158 #define sctp_alloc_a_chunk(_stcb, _chk) { \
  159         if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks))  { \
  160                 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \
  161                 if ((_chk)) { \
  162                         SCTP_INCR_CHK_COUNT(); \
  163                         (_chk)->whoTo = NULL; \
  164                         (_chk)->holds_key_ref = 0; \
  165                 } \
  166         } else { \
  167                 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \
  168                 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
  169                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
  170                 (_chk)->holds_key_ref = 0; \
  171                 SCTP_STAT_INCR(sctps_cached_chk); \
  172                 (_stcb)->asoc.free_chunk_cnt--; \
  173         } \
  174 }
  175 
  176 
  177 #define sctp_free_remote_addr(__net) { \
  178         if ((__net)) {  \
  179                 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \
  180                         (void)SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \
  181                         (void)SCTP_OS_TIMER_STOP(&(__net)->pmtu_timer.timer); \
  182                         if ((__net)->ro.ro_rt) { \
  183                                 RTFREE((__net)->ro.ro_rt); \
  184                                 (__net)->ro.ro_rt = NULL; \
  185                         } \
  186                         if ((__net)->src_addr_selected) { \
  187                                 sctp_free_ifa((__net)->ro._s_addr); \
  188                                 (__net)->ro._s_addr = NULL; \
  189                         } \
  190                         (__net)->src_addr_selected = 0; \
  191                         (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \
  192                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \
  193                         SCTP_DECR_RADDR_COUNT(); \
  194                 } \
  195         } \
  196 }
  197 
  198 #define sctp_sbfree(ctl, stcb, sb, m) { \
  199         SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \
  200         SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \
  201         if (((ctl)->do_not_ref_stcb == 0) && stcb) {\
  202                 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
  203                 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
  204         } \
  205         if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
  206             SCTP_BUF_TYPE(m) != MT_OOBDATA) \
  207                 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
  208 }
  209 
  210 #define sctp_sballoc(stcb, sb, m) { \
  211         atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \
  212         atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \
  213         if (stcb) { \
  214                 atomic_add_int(&(stcb)->asoc.sb_cc,SCTP_BUF_LEN((m))); \
  215                 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
  216         } \
  217         if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
  218             SCTP_BUF_TYPE(m) != MT_OOBDATA) \
  219                 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
  220 }
  221 
  222 
  223 #define sctp_ucount_incr(val) { \
  224         val++; \
  225 }
  226 
  227 #define sctp_ucount_decr(val) { \
  228         if (val > 0) { \
  229                 val--; \
  230         } else { \
  231                 val = 0; \
  232         } \
  233 }
  234 
  235 #define sctp_mbuf_crush(data) do { \
  236         struct mbuf *_m; \
  237         _m = (data); \
  238         while(_m && (SCTP_BUF_LEN(_m) == 0)) { \
  239                 (data)  = SCTP_BUF_NEXT(_m); \
  240                 SCTP_BUF_NEXT(_m) = NULL; \
  241                 sctp_m_free(_m); \
  242                 _m = (data); \
  243         } \
  244 } while (0)
  245 
  246 #define sctp_flight_size_decrease(tp1) do { \
  247         if (tp1->whoTo->flight_size >= tp1->book_size) \
  248                 tp1->whoTo->flight_size -= tp1->book_size; \
  249         else \
  250                 tp1->whoTo->flight_size = 0; \
  251 } while (0)
  252 
  253 #define sctp_flight_size_increase(tp1) do { \
  254        (tp1)->whoTo->flight_size += (tp1)->book_size; \
  255 } while (0)
  256 
  257 #ifdef SCTP_FS_SPEC_LOG
  258 #define sctp_total_flight_decrease(stcb, tp1) do { \
  259         if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
  260                 stcb->asoc.fs_index = 0;\
  261         stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
  262         stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \
  263         stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
  264         stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
  265         stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \
  266         stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \
  267         stcb->asoc.fs_index++; \
  268         tp1->window_probe = 0; \
  269         if (stcb->asoc.total_flight >= tp1->book_size) { \
  270                 stcb->asoc.total_flight -= tp1->book_size; \
  271                 if (stcb->asoc.total_flight_count > 0) \
  272                         stcb->asoc.total_flight_count--; \
  273         } else { \
  274                 stcb->asoc.total_flight = 0; \
  275                 stcb->asoc.total_flight_count = 0; \
  276         } \
  277 } while (0)
  278 
  279 #define sctp_total_flight_increase(stcb, tp1) do { \
  280         if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
  281                 stcb->asoc.fs_index = 0;\
  282         stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
  283         stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \
  284         stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
  285         stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
  286         stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \
  287         stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \
  288         stcb->asoc.fs_index++; \
  289        (stcb)->asoc.total_flight_count++; \
  290        (stcb)->asoc.total_flight += (tp1)->book_size; \
  291 } while (0)
  292 
  293 #else
  294 
  295 #define sctp_total_flight_decrease(stcb, tp1) do { \
  296         tp1->window_probe = 0; \
  297         if (stcb->asoc.total_flight >= tp1->book_size) { \
  298                 stcb->asoc.total_flight -= tp1->book_size; \
  299                 if (stcb->asoc.total_flight_count > 0) \
  300                         stcb->asoc.total_flight_count--; \
  301         } else { \
  302                 stcb->asoc.total_flight = 0; \
  303                 stcb->asoc.total_flight_count = 0; \
  304         } \
  305 } while (0)
  306 
  307 #define sctp_total_flight_increase(stcb, tp1) do { \
  308        (stcb)->asoc.total_flight_count++; \
  309        (stcb)->asoc.total_flight += (tp1)->book_size; \
  310 } while (0)
  311 
  312 #endif
  313 
  314 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold)
  315 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count)
  316 
  317 struct sctp_nets;
  318 struct sctp_inpcb;
  319 struct sctp_tcb;
  320 struct sctphdr;
  321 
  322 
  323 void sctp_close(struct socket *so);
  324 int sctp_disconnect(struct socket *so);
  325 
  326 void sctp_ctlinput __P((int, struct sockaddr *, void *));
  327 int sctp_ctloutput __P((struct socket *, struct sockopt *));
  328 
  329 #ifdef INET
  330 void sctp_input_with_port __P((struct mbuf *, int, uint16_t));
  331 
  332 #endif
  333 #ifdef INET
  334 void sctp_input __P((struct mbuf *, int));
  335 
  336 #endif
  337 void sctp_pathmtu_adjustment __P((struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *, uint16_t));
  338 void sctp_drain __P((void));
  339 void sctp_init __P((void));
  340 
  341 void sctp_finish(void);
  342 
  343 int sctp_flush(struct socket *, int);
  344 int sctp_shutdown __P((struct socket *));
  345 void sctp_notify 
  346 __P((struct sctp_inpcb *, struct ip *ip, struct sctphdr *,
  347     struct sockaddr *, struct sctp_tcb *,
  348     struct sctp_nets *));
  349 
  350         int sctp_bindx(struct socket *, int, struct sockaddr_storage *,
  351         int, int, struct proc *);
  352 
  353 /* can't use sctp_assoc_t here */
  354         int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
  355 
  356         int sctp_ingetaddr(struct socket *,
  357         struct sockaddr **
  358 );
  359 
  360         int sctp_peeraddr(struct socket *,
  361         struct sockaddr **
  362 );
  363 
  364         int sctp_listen(struct socket *, int, struct thread *);
  365 
  366         int sctp_accept(struct socket *, struct sockaddr **);
  367 
  368 #endif                          /* _KERNEL */
  369 
  370 #endif                          /* !_NETINET_SCTP_VAR_H_ */

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