The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: 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) 2008-2012, 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("$FreeBSD$");
   35 
   36 #ifndef _NETINET_SCTP_VAR_H_
   37 #define _NETINET_SCTP_VAR_H_
   38 
   39 #include <netinet/sctp_uio.h>
   40 
   41 #if defined(_KERNEL) || defined(__Userspace__)
   42 
   43 extern struct pr_usrreqs sctp_usrreqs;
   44 
   45 
   46 #define sctp_feature_on(inp, feature)  (inp->sctp_features |= feature)
   47 #define sctp_feature_off(inp, feature) (inp->sctp_features &= ~feature)
   48 #define sctp_is_feature_on(inp, feature) ((inp->sctp_features & feature) == feature)
   49 #define sctp_is_feature_off(inp, feature) ((inp->sctp_features & feature) == 0)
   50 
   51 #define sctp_stcb_feature_on(inp, stcb, feature) {\
   52         if (stcb) { \
   53                 stcb->asoc.sctp_features |= feature; \
   54         } else if (inp) { \
   55                 inp->sctp_features |= feature; \
   56         } \
   57 }
   58 #define sctp_stcb_feature_off(inp, stcb, feature) {\
   59         if (stcb) { \
   60                 stcb->asoc.sctp_features &= ~feature; \
   61         } else if (inp) { \
   62                 inp->sctp_features &= ~feature; \
   63         } \
   64 }
   65 #define sctp_stcb_is_feature_on(inp, stcb, feature) \
   66         (((stcb != NULL) && \
   67           ((stcb->asoc.sctp_features & feature) == feature)) || \
   68          ((stcb == NULL) && (inp != NULL) && \
   69           ((inp->sctp_features & feature) == feature)))
   70 #define sctp_stcb_is_feature_off(inp, stcb, feature) \
   71         (((stcb != NULL) && \
   72           ((stcb->asoc.sctp_features & feature) == 0)) || \
   73          ((stcb == NULL) && (inp != NULL) && \
   74           ((inp->sctp_features & feature) == 0)) || \
   75          ((stcb == NULL) && (inp == NULL)))
   76 
   77 /* managing mobility_feature in inpcb (by micchie) */
   78 #define sctp_mobility_feature_on(inp, feature)  (inp->sctp_mobility_features |= feature)
   79 #define sctp_mobility_feature_off(inp, feature) (inp->sctp_mobility_features &= ~feature)
   80 #define sctp_is_mobility_feature_on(inp, feature) (inp->sctp_mobility_features & feature)
   81 #define sctp_is_mobility_feature_off(inp, feature) ((inp->sctp_mobility_features & feature) == 0)
   82 
   83 #define sctp_maxspace(sb) (max((sb)->sb_hiwat,SCTP_MINIMAL_RWND))
   84 
   85 #define sctp_sbspace(asoc, sb) ((long) ((sctp_maxspace(sb) > (asoc)->sb_cc) ? (sctp_maxspace(sb) - (asoc)->sb_cc) : 0))
   86 
   87 #define sctp_sbspace_failedmsgs(sb) ((long) ((sctp_maxspace(sb) > (sb)->sb_cc) ? (sctp_maxspace(sb) - (sb)->sb_cc) : 0))
   88 
   89 #define sctp_sbspace_sub(a,b) ((a > b) ? (a - b) : 0)
   90 
   91 /*
   92  * I tried to cache the readq entries at one point. But the reality
   93  * is that it did not add any performance since this meant we had to
   94  * lock the STCB on read. And at that point once you have to do an
   95  * extra lock, it really does not matter if the lock is in the ZONE
   96  * stuff or in our code. Note that this same problem would occur with
   97  * an mbuf cache as well so it is not really worth doing, at least
   98  * right now :-D
   99  */
  100 
  101 #define sctp_free_a_readq(_stcb, _readq) { \
  102         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
  103         SCTP_DECR_READQ_COUNT(); \
  104 }
  105 
  106 #define sctp_alloc_a_readq(_stcb, _readq) { \
  107         (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \
  108         if ((_readq)) { \
  109              SCTP_INCR_READQ_COUNT(); \
  110         } \
  111 }
  112 
  113 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \
  114         if ((_strmoq)->holds_key_ref) { \
  115                 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \
  116                 (_strmoq)->holds_key_ref = 0; \
  117         } \
  118         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \
  119         SCTP_DECR_STRMOQ_COUNT(); \
  120 }
  121 
  122 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \
  123         (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \
  124          if ((_strmoq)) {                         \
  125                 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \
  126                 SCTP_INCR_STRMOQ_COUNT(); \
  127                 (_strmoq)->holds_key_ref = 0; \
  128         } \
  129 }
  130 
  131 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \
  132         if ((_chk)->holds_key_ref) {\
  133                 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \
  134                 (_chk)->holds_key_ref = 0; \
  135         } \
  136         if (_stcb) { \
  137           SCTP_TCB_LOCK_ASSERT((_stcb)); \
  138           if ((_chk)->whoTo) { \
  139                   sctp_free_remote_addr((_chk)->whoTo); \
  140                   (_chk)->whoTo = NULL; \
  141           } \
  142           if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \
  143                (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \
  144                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
  145                 SCTP_DECR_CHK_COUNT(); \
  146           } else { \
  147                 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
  148                 (_stcb)->asoc.free_chunk_cnt++; \
  149                 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
  150           } \
  151         } else { \
  152                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
  153                 SCTP_DECR_CHK_COUNT(); \
  154         } \
  155 }
  156 
  157 #define sctp_alloc_a_chunk(_stcb, _chk) { \
  158         if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \
  159                 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \
  160                 if ((_chk)) { \
  161                         SCTP_INCR_CHK_COUNT(); \
  162                         (_chk)->whoTo = NULL; \
  163                         (_chk)->holds_key_ref = 0; \
  164                 } \
  165         } else { \
  166                 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \
  167                 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
  168                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
  169                 (_chk)->holds_key_ref = 0; \
  170                 SCTP_STAT_INCR(sctps_cached_chk); \
  171                 (_stcb)->asoc.free_chunk_cnt--; \
  172         } \
  173 }
  174 
  175 
  176 #define sctp_free_remote_addr(__net) { \
  177         if ((__net)) {  \
  178                 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \
  179                         (void)SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \
  180                         (void)SCTP_OS_TIMER_STOP(&(__net)->pmtu_timer.timer); \
  181                         if ((__net)->ro.ro_rt) { \
  182                                 RTFREE((__net)->ro.ro_rt); \
  183                                 (__net)->ro.ro_rt = NULL; \
  184                         } \
  185                         if ((__net)->src_addr_selected) { \
  186                                 sctp_free_ifa((__net)->ro._s_addr); \
  187                                 (__net)->ro._s_addr = NULL; \
  188                         } \
  189                         (__net)->src_addr_selected = 0; \
  190                         (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \
  191                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \
  192                         SCTP_DECR_RADDR_COUNT(); \
  193                 } \
  194         } \
  195 }
  196 
  197 #define sctp_sbfree(ctl, stcb, sb, m) { \
  198         SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \
  199         SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \
  200         if (((ctl)->do_not_ref_stcb == 0) && stcb) {\
  201                 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
  202                 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
  203         } \
  204         if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
  205             SCTP_BUF_TYPE(m) != MT_OOBDATA) \
  206                 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
  207 }
  208 
  209 #define sctp_sballoc(stcb, sb, m) { \
  210         atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \
  211         atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \
  212         if (stcb) { \
  213                 atomic_add_int(&(stcb)->asoc.sb_cc,SCTP_BUF_LEN((m))); \
  214                 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
  215         } \
  216         if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
  217             SCTP_BUF_TYPE(m) != MT_OOBDATA) \
  218                 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
  219 }
  220 
  221 
  222 #define sctp_ucount_incr(val) { \
  223         val++; \
  224 }
  225 
  226 #define sctp_ucount_decr(val) { \
  227         if (val > 0) { \
  228                 val--; \
  229         } else { \
  230                 val = 0; \
  231         } \
  232 }
  233 
  234 #define sctp_mbuf_crush(data) do { \
  235         struct mbuf *_m; \
  236         _m = (data); \
  237         while (_m && (SCTP_BUF_LEN(_m) == 0)) { \
  238                 (data)  = SCTP_BUF_NEXT(_m); \
  239                 SCTP_BUF_NEXT(_m) = NULL; \
  240                 sctp_m_free(_m); \
  241                 _m = (data); \
  242         } \
  243 } while (0)
  244 
  245 #define sctp_flight_size_decrease(tp1) do { \
  246         if (tp1->whoTo->flight_size >= tp1->book_size) \
  247                 tp1->whoTo->flight_size -= tp1->book_size; \
  248         else \
  249                 tp1->whoTo->flight_size = 0; \
  250 } while (0)
  251 
  252 #define sctp_flight_size_increase(tp1) do { \
  253        (tp1)->whoTo->flight_size += (tp1)->book_size; \
  254 } while (0)
  255 
  256 #ifdef SCTP_FS_SPEC_LOG
  257 #define sctp_total_flight_decrease(stcb, tp1) do { \
  258         if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
  259                 stcb->asoc.fs_index = 0;\
  260         stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
  261         stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \
  262         stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
  263         stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
  264         stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \
  265         stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \
  266         stcb->asoc.fs_index++; \
  267         tp1->window_probe = 0; \
  268         if (stcb->asoc.total_flight >= tp1->book_size) { \
  269                 stcb->asoc.total_flight -= tp1->book_size; \
  270                 if (stcb->asoc.total_flight_count > 0) \
  271                         stcb->asoc.total_flight_count--; \
  272         } else { \
  273                 stcb->asoc.total_flight = 0; \
  274                 stcb->asoc.total_flight_count = 0; \
  275         } \
  276 } while (0)
  277 
  278 #define sctp_total_flight_increase(stcb, tp1) do { \
  279         if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
  280                 stcb->asoc.fs_index = 0;\
  281         stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
  282         stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \
  283         stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
  284         stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
  285         stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \
  286         stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \
  287         stcb->asoc.fs_index++; \
  288        (stcb)->asoc.total_flight_count++; \
  289        (stcb)->asoc.total_flight += (tp1)->book_size; \
  290 } while (0)
  291 
  292 #else
  293 
  294 #define sctp_total_flight_decrease(stcb, tp1) do { \
  295         tp1->window_probe = 0; \
  296         if (stcb->asoc.total_flight >= tp1->book_size) { \
  297                 stcb->asoc.total_flight -= tp1->book_size; \
  298                 if (stcb->asoc.total_flight_count > 0) \
  299                         stcb->asoc.total_flight_count--; \
  300         } else { \
  301                 stcb->asoc.total_flight = 0; \
  302                 stcb->asoc.total_flight_count = 0; \
  303         } \
  304 } while (0)
  305 
  306 #define sctp_total_flight_increase(stcb, tp1) do { \
  307        (stcb)->asoc.total_flight_count++; \
  308        (stcb)->asoc.total_flight += (tp1)->book_size; \
  309 } while (0)
  310 
  311 #endif
  312 
  313 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold)
  314 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count)
  315 
  316 struct sctp_nets;
  317 struct sctp_inpcb;
  318 struct sctp_tcb;
  319 struct sctphdr;
  320 
  321 
  322 void sctp_close(struct socket *so);
  323 int sctp_disconnect(struct socket *so);
  324 void sctp_ctlinput(int, struct sockaddr *, void *);
  325 int sctp_ctloutput(struct socket *, struct sockopt *);
  326 
  327 #ifdef INET
  328 void sctp_input_with_port(struct mbuf *, int, uint16_t);
  329 void sctp_input(struct mbuf *, int);
  330 
  331 #endif
  332 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint16_t);
  333 void sctp_drain(void);
  334 void sctp_init(void);
  335 void sctp_finish(void);
  336 int sctp_flush(struct socket *, int);
  337 int sctp_shutdown(struct socket *);
  338 void 
  339 sctp_notify(struct sctp_inpcb *, struct ip *ip, struct sctphdr *,
  340     struct sockaddr *, struct sctp_tcb *,
  341     struct sctp_nets *);
  342 int 
  343 sctp_bindx(struct socket *, int, struct sockaddr_storage *,
  344     int, int, struct proc *);
  345 
  346 /* can't use sctp_assoc_t here */
  347 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
  348 int sctp_ingetaddr(struct socket *, struct sockaddr **);
  349 int sctp_peeraddr(struct socket *, struct sockaddr **);
  350 int sctp_listen(struct socket *, int, struct thread *);
  351 int sctp_accept(struct socket *, struct sockaddr **);
  352 
  353 #endif                          /* _KERNEL */
  354 
  355 #endif                          /* !_NETINET_SCTP_VAR_H_ */

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