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 #ifdef INVARIANTS
  101 #define sctp_free_a_readq(_stcb, _readq) { \
  102         if ((_readq)->on_strm_q) \
  103                 panic("On strm q stcb:%p readq:%p", (_stcb), (_readq)); \
  104         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
  105         SCTP_DECR_READQ_COUNT(); \
  106 }
  107 #else
  108 #define sctp_free_a_readq(_stcb, _readq) { \
  109         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
  110         SCTP_DECR_READQ_COUNT(); \
  111 }
  112 #endif
  113 
  114 #define sctp_alloc_a_readq(_stcb, _readq) { \
  115         (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \
  116         if ((_readq)) { \
  117              SCTP_INCR_READQ_COUNT(); \
  118         } \
  119 }
  120 
  121 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \
  122         if ((_strmoq)->holds_key_ref) { \
  123                 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \
  124                 (_strmoq)->holds_key_ref = 0; \
  125         } \
  126         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \
  127         SCTP_DECR_STRMOQ_COUNT(); \
  128 }
  129 
  130 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \
  131         (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \
  132         if ((_strmoq)) { \
  133                 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \
  134                 SCTP_INCR_STRMOQ_COUNT(); \
  135                 (_strmoq)->holds_key_ref = 0; \
  136         } \
  137 }
  138 
  139 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \
  140         if ((_chk)->holds_key_ref) {\
  141                 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \
  142                 (_chk)->holds_key_ref = 0; \
  143         } \
  144         if (_stcb) { \
  145                 SCTP_TCB_LOCK_ASSERT((_stcb)); \
  146                 if ((_chk)->whoTo) { \
  147                         sctp_free_remote_addr((_chk)->whoTo); \
  148                         (_chk)->whoTo = NULL; \
  149                 } \
  150                 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \
  151                     (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \
  152                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
  153                         SCTP_DECR_CHK_COUNT(); \
  154                 } else { \
  155                         TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
  156                         (_stcb)->asoc.free_chunk_cnt++; \
  157                         atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
  158                 } \
  159         } else { \
  160                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
  161                 SCTP_DECR_CHK_COUNT(); \
  162         } \
  163 }
  164 
  165 #define sctp_alloc_a_chunk(_stcb, _chk) { \
  166         if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \
  167                 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \
  168                 if ((_chk)) { \
  169                         SCTP_INCR_CHK_COUNT(); \
  170                         (_chk)->whoTo = NULL; \
  171                         (_chk)->holds_key_ref = 0; \
  172                 } \
  173         } else { \
  174                 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \
  175                 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
  176                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
  177                 (_chk)->holds_key_ref = 0; \
  178                 SCTP_STAT_INCR(sctps_cached_chk); \
  179                 (_stcb)->asoc.free_chunk_cnt--; \
  180         } \
  181 }
  182 
  183 
  184 #define sctp_free_remote_addr(__net) { \
  185         if ((__net)) {  \
  186                 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \
  187                         (void)SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \
  188                         if ((__net)->ro.ro_rt) { \
  189                                 RTFREE((__net)->ro.ro_rt); \
  190                                 (__net)->ro.ro_rt = NULL; \
  191                         } \
  192                         if ((__net)->src_addr_selected) { \
  193                                 sctp_free_ifa((__net)->ro._s_addr); \
  194                                 (__net)->ro._s_addr = NULL; \
  195                         } \
  196                         (__net)->src_addr_selected = 0; \
  197                         (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \
  198                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \
  199                         SCTP_DECR_RADDR_COUNT(); \
  200                 } \
  201         } \
  202 }
  203 
  204 #define sctp_sbfree(ctl, stcb, sb, m) { \
  205         SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \
  206         SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \
  207         if (((ctl)->do_not_ref_stcb == 0) && stcb) {\
  208                 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
  209                 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
  210         } \
  211         if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
  212             SCTP_BUF_TYPE(m) != MT_OOBDATA) \
  213                 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
  214 }
  215 
  216 #define sctp_sballoc(stcb, sb, m) { \
  217         atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \
  218         atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \
  219         if (stcb) { \
  220                 atomic_add_int(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
  221                 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
  222         } \
  223         if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
  224             SCTP_BUF_TYPE(m) != MT_OOBDATA) \
  225                 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
  226 }
  227 
  228 
  229 #define sctp_ucount_incr(val) { \
  230         val++; \
  231 }
  232 
  233 #define sctp_ucount_decr(val) { \
  234         if (val > 0) { \
  235                 val--; \
  236         } else { \
  237                 val = 0; \
  238         } \
  239 }
  240 
  241 #define sctp_mbuf_crush(data) do { \
  242         struct mbuf *_m; \
  243         _m = (data); \
  244         while (_m && (SCTP_BUF_LEN(_m) == 0)) { \
  245                 (data)  = SCTP_BUF_NEXT(_m); \
  246                 SCTP_BUF_NEXT(_m) = NULL; \
  247                 sctp_m_free(_m); \
  248                 _m = (data); \
  249         } \
  250 } while (0)
  251 
  252 #define sctp_flight_size_decrease(tp1) do { \
  253         if (tp1->whoTo->flight_size >= tp1->book_size) \
  254                 tp1->whoTo->flight_size -= tp1->book_size; \
  255         else \
  256                 tp1->whoTo->flight_size = 0; \
  257 } while (0)
  258 
  259 #define sctp_flight_size_increase(tp1) do { \
  260         (tp1)->whoTo->flight_size += (tp1)->book_size; \
  261 } while (0)
  262 
  263 #ifdef SCTP_FS_SPEC_LOG
  264 #define sctp_total_flight_decrease(stcb, tp1) do { \
  265         if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
  266                 stcb->asoc.fs_index = 0;\
  267         stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
  268         stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \
  269         stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
  270         stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
  271         stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \
  272         stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \
  273         stcb->asoc.fs_index++; \
  274         tp1->window_probe = 0; \
  275         if (stcb->asoc.total_flight >= tp1->book_size) { \
  276                 stcb->asoc.total_flight -= tp1->book_size; \
  277                 if (stcb->asoc.total_flight_count > 0) \
  278                         stcb->asoc.total_flight_count--; \
  279         } else { \
  280                 stcb->asoc.total_flight = 0; \
  281                 stcb->asoc.total_flight_count = 0; \
  282         } \
  283 } while (0)
  284 
  285 #define sctp_total_flight_increase(stcb, tp1) do { \
  286         if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
  287                 stcb->asoc.fs_index = 0;\
  288         stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
  289         stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \
  290         stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
  291         stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
  292         stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \
  293         stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \
  294         stcb->asoc.fs_index++; \
  295         (stcb)->asoc.total_flight_count++; \
  296         (stcb)->asoc.total_flight += (tp1)->book_size; \
  297 } while (0)
  298 
  299 #else
  300 
  301 #define sctp_total_flight_decrease(stcb, tp1) do { \
  302         tp1->window_probe = 0; \
  303         if (stcb->asoc.total_flight >= tp1->book_size) { \
  304                 stcb->asoc.total_flight -= tp1->book_size; \
  305                 if (stcb->asoc.total_flight_count > 0) \
  306                         stcb->asoc.total_flight_count--; \
  307         } else { \
  308                 stcb->asoc.total_flight = 0; \
  309                 stcb->asoc.total_flight_count = 0; \
  310         } \
  311 } while (0)
  312 
  313 #define sctp_total_flight_increase(stcb, tp1) do { \
  314         (stcb)->asoc.total_flight_count++; \
  315         (stcb)->asoc.total_flight += (tp1)->book_size; \
  316 } while (0)
  317 
  318 #endif
  319 
  320 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold)
  321 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count)
  322 
  323 struct sctp_nets;
  324 struct sctp_inpcb;
  325 struct sctp_tcb;
  326 struct sctphdr;
  327 
  328 
  329 void sctp_close(struct socket *so);
  330 int sctp_disconnect(struct socket *so);
  331 void sctp_ctlinput(int, struct sockaddr *, void *);
  332 int sctp_ctloutput(struct socket *, struct sockopt *);
  333 #ifdef INET
  334 void sctp_input_with_port(struct mbuf *, int, uint16_t);
  335 int sctp_input(struct mbuf **, int *, int);
  336 #endif
  337 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint16_t);
  338 void sctp_drain(void);
  339 void sctp_init(void);
  340 void
  341 sctp_notify(struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *,
  342     uint8_t, uint8_t, uint16_t, uint32_t);
  343 int sctp_flush(struct socket *, int);
  344 int sctp_shutdown(struct socket *);
  345 int
  346 sctp_bindx(struct socket *, int, struct sockaddr_storage *,
  347     int, int, struct proc *);
  348 
  349 /* can't use sctp_assoc_t here */
  350 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
  351 int sctp_ingetaddr(struct socket *, struct sockaddr **);
  352 int sctp_peeraddr(struct socket *, struct sockaddr **);
  353 int sctp_listen(struct socket *, int, struct thread *);
  354 int sctp_accept(struct socket *, struct sockaddr **);
  355 
  356 #endif                          /* _KERNEL */
  357 
  358 #endif                          /* !_NETINET_SCTP_VAR_H_ */

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