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/sctputil.h

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    1 /*-
    2  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions are met:
    6  *
    7  * a) Redistributions of source code must retain the above copyright notice,
    8  *   this list of conditions and the following disclaimer.
    9  *
   10  * b) Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in
   12  *   the documentation and/or other materials provided with the distribution.
   13  *
   14  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   15  *    contributors may be used to endorse or promote products derived
   16  *    from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   28  * THE POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 
   32 /* $KAME: sctputil.h,v 1.15 2005/03/06 16:04:19 itojun Exp $     */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD$");
   36 #ifndef __sctputil_h__
   37 #define __sctputil_h__
   38 
   39 
   40 #if defined(_KERNEL)
   41 
   42 
   43 #ifdef SCTP_ASOCLOG_OF_TSNS
   44 void sctp_print_out_track_log(struct sctp_tcb *stcb);
   45 
   46 #endif
   47 
   48 #ifdef SCTP_MBUF_LOGGING
   49 struct mbuf *sctp_m_free(struct mbuf *m);
   50 void sctp_m_freem(struct mbuf *m);
   51 
   52 #else
   53 #define sctp_m_free m_free
   54 #define sctp_m_freem m_freem
   55 #endif
   56 
   57 #if defined(SCTP_LOCAL_TRACE_BUF) || defined(__APPLE__)
   58 void
   59      sctp_log_trace(uint32_t fr, const char *str SCTP_UNUSED, uint32_t a, uint32_t b, uint32_t c, uint32_t d, uint32_t e, uint32_t f);
   60 
   61 #endif
   62 
   63 #define sctp_get_associd(stcb) ((sctp_assoc_t)stcb->asoc.assoc_id)
   64 
   65 
   66 /*
   67  * Function prototypes
   68  */
   69 uint32_t
   70 sctp_get_ifa_hash_val(struct sockaddr *addr);
   71 
   72 struct sctp_ifa *
   73          sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, int hold_lock);
   74 
   75 struct sctp_ifa *
   76          sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock);
   77 
   78 uint32_t sctp_select_initial_TSN(struct sctp_pcb *);
   79 
   80 uint32_t sctp_select_a_tag(struct sctp_inpcb *, int);
   81 
   82 int sctp_init_asoc(struct sctp_inpcb *, struct sctp_tcb *, int, uint32_t, uint32_t);
   83 
   84 void sctp_fill_random_store(struct sctp_pcb *);
   85 
   86 void
   87 sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,
   88     struct sctp_nets *);
   89 
   90 void
   91 sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,
   92     struct sctp_nets *, uint32_t);
   93 
   94 int
   95     sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id);
   96 
   97 uint32_t sctp_calculate_sum(struct mbuf *, int32_t *, uint32_t);
   98 
   99 void
  100      sctp_mtu_size_reset(struct sctp_inpcb *, struct sctp_association *, uint32_t);
  101 
  102 void
  103 sctp_add_to_readq(struct sctp_inpcb *inp,
  104     struct sctp_tcb *stcb,
  105     struct sctp_queued_to_read *control,
  106     struct sockbuf *sb,
  107     int end,
  108     int so_locked
  109 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  110     SCTP_UNUSED
  111 #endif
  112 );
  113 
  114 int
  115 sctp_append_to_readq(struct sctp_inpcb *inp,
  116     struct sctp_tcb *stcb,
  117     struct sctp_queued_to_read *control,
  118     struct mbuf *m,
  119     int end,
  120     int new_cumack,
  121     struct sockbuf *sb);
  122 
  123 
  124 void sctp_iterator_worker(void);
  125 
  126 int find_next_best_mtu(int);
  127 
  128 void
  129      sctp_timeout_handler(void *);
  130 
  131 uint32_t
  132 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
  133     struct sctp_nets *, struct timeval *, int);
  134 
  135 uint32_t sctp_calculate_len(struct mbuf *);
  136 
  137 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
  138 
  139 struct sctp_paramhdr *
  140 sctp_get_next_param(struct mbuf *, int,
  141     struct sctp_paramhdr *, int);
  142 
  143 int sctp_add_pad_tombuf(struct mbuf *, int);
  144 
  145 int sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
  146 
  147 void 
  148 sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int
  149 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  150     SCTP_UNUSED
  151 #endif
  152 );
  153 
  154 void
  155 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
  156     struct sctp_inpcb *new_inp,
  157     struct sctp_tcb *stcb, int waitflags);
  158 
  159 
  160 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
  161 
  162 void 
  163 sctp_report_all_outbound(struct sctp_tcb *, int, int
  164 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  165     SCTP_UNUSED
  166 #endif
  167 );
  168 
  169 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);
  170 
  171 void 
  172 sctp_abort_notification(struct sctp_tcb *, int, int
  173 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  174     SCTP_UNUSED
  175 #endif
  176 );
  177 
  178 /* We abort responding to an IP packet for some reason */
  179 void
  180 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *,
  181     struct mbuf *, int, struct sctphdr *, struct mbuf *, uint32_t);
  182 
  183 
  184 /* We choose to abort via user input */
  185 void
  186 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *, int,
  187     struct mbuf *, int
  188 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  189     SCTP_UNUSED
  190 #endif
  191 );
  192 
  193 void 
  194 sctp_handle_ootb(struct mbuf *, int, int, struct sctphdr *,
  195     struct sctp_inpcb *, struct mbuf *, uint32_t);
  196 
  197 int 
  198 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
  199     int totaddr, int *error);
  200 
  201 struct sctp_tcb *
  202 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
  203     int *totaddr, int *num_v4, int *num_v6, int *error, int limit, int *bad_addr);
  204 
  205 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
  206 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  207 
  208 struct sockaddr_in6 *
  209              sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  210 
  211 #define sctp_recover_scope_mac(addr, store) do { \
  212          if ((addr->sin6_family == AF_INET6) && \
  213              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  214                 *store = *addr; \
  215                 if (addr->sin6_scope_id == 0) { \
  216                         if (!sa6_recoverscope(store)) { \
  217                                 addr = store; \
  218                         } \
  219                 } else { \
  220                         in6_clearscope(&addr->sin6_addr); \
  221                         addr = store; \
  222                 } \
  223          } \
  224 } while (0)
  225 
  226 
  227 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  228 
  229 void sctp_print_address(struct sockaddr *);
  230 void sctp_print_address_pkt(struct ip *, struct sctphdr *);
  231 
  232 void
  233 sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb,
  234     uint32_t error, int no_lock, uint32_t strseq);
  235 
  236 int
  237 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  238     int, struct sctpchunk_listhead *, int
  239 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  240     SCTP_UNUSED
  241 #endif
  242 );
  243 
  244 struct mbuf *sctp_generate_invmanparam(int);
  245 
  246 void 
  247 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
  248     struct sockaddr *sa, sctp_assoc_t assoc_id,
  249     uint32_t vrf_id, int *error, void *p);
  250 void 
  251 sctp_bindx_delete_address(struct socket *so, struct sctp_inpcb *inp,
  252     struct sockaddr *sa, sctp_assoc_t assoc_id,
  253     uint32_t vrf_id, int *error);
  254 
  255 int sctp_local_addr_count(struct sctp_tcb *stcb);
  256 
  257 #ifdef SCTP_MBCNT_LOGGING
  258 void
  259 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
  260     struct sctp_tmit_chunk *, int);
  261 
  262 #else
  263 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)  \
  264 do { \
  265         if (tp1->data != NULL) { \
  266                 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \
  267                 if ((asoc)->total_output_queue_size >= tp1->book_size) { \
  268                         atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \
  269                 } else { \
  270                         (asoc)->total_output_queue_size = 0; \
  271                 } \
  272                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  273                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  274                         if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \
  275                                 atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); \
  276                         } else { \
  277                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  278                         } \
  279                 } \
  280         } \
  281 } while (0)
  282 
  283 #endif
  284 
  285 #define sctp_free_spbufspace(stcb, asoc, sp)  \
  286 do { \
  287         if (sp->data != NULL) { \
  288                 atomic_subtract_int(&(asoc)->chunks_on_out_queue, 1); \
  289                 if ((asoc)->total_output_queue_size >= sp->length) { \
  290                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  291                 } else { \
  292                         (asoc)->total_output_queue_size = 0; \
  293                 } \
  294                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  295                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  296                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  297                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  298                         } else { \
  299                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  300                         } \
  301                 } \
  302         } \
  303 } while (0)
  304 
  305 #define sctp_snd_sb_alloc(stcb, sz)  \
  306 do { \
  307         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  308         if ((stcb->sctp_socket != NULL) && \
  309             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  310              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  311                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  312         } \
  313 } while (0)
  314 
  315 
  316 int
  317 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  318     struct uio *uio,
  319     struct mbuf **mp0,
  320     struct mbuf **controlp,
  321     int *flagsp);
  322 
  323 
  324 /* For those not passing mbufs, this does the
  325  * translations for you. Caller owns memory
  326  * of size controllen returned in controlp.
  327  */
  328 int 
  329 sctp_l_soreceive(struct socket *so,
  330     struct sockaddr **name,
  331     struct uio *uio,
  332     char **controlp,
  333     int *controllen,
  334     int *flag);
  335 
  336 
  337 void
  338      sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
  339 
  340 void
  341 sctp_wakeup_log(struct sctp_tcb *stcb,
  342     uint32_t cumtsn,
  343     uint32_t wake_cnt, int from);
  344 
  345 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
  346 
  347 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
  348 
  349 
  350 void
  351      sctp_log_mb(struct mbuf *m, int from);
  352 
  353 void
  354 sctp_sblog(struct sockbuf *sb,
  355     struct sctp_tcb *stcb, int from, int incr);
  356 
  357 void
  358 sctp_log_strm_del(struct sctp_queued_to_read *control,
  359     struct sctp_queued_to_read *poschk,
  360     int from);
  361 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  362 void rto_logging(struct sctp_nets *net, int from);
  363 
  364 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  365 
  366 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  367 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  368 void sctp_log_block(uint8_t, struct socket *, struct sctp_association *, int);
  369 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  370 void sctp_log_mbcnt(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  371 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  372 int sctp_fill_stat_log(void *, size_t *);
  373 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
  374 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
  375 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
  376 
  377 void sctp_clr_stat_log(void);
  378 
  379 
  380 #ifdef SCTP_AUDITING_ENABLED
  381 void
  382 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
  383     struct sctp_nets *);
  384 void sctp_audit_log(uint8_t, uint8_t);
  385 
  386 #endif
  387 
  388 
  389 #endif                          /* _KERNEL */
  390 #endif

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