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) || defined(__Userspace__)
   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, uint16_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, uint16_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 
  207 #ifdef INET6
  208 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  209 
  210 struct sockaddr_in6 *
  211              sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  212 
  213 #define sctp_recover_scope_mac(addr, store) do { \
  214          if ((addr->sin6_family == AF_INET6) && \
  215              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  216                 *store = *addr; \
  217                 if (addr->sin6_scope_id == 0) { \
  218                         if (!sa6_recoverscope(store)) { \
  219                                 addr = store; \
  220                         } \
  221                 } else { \
  222                         in6_clearscope(&addr->sin6_addr); \
  223                         addr = store; \
  224                 } \
  225          } \
  226 } while (0)
  227 #endif
  228 
  229 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  230 
  231 void sctp_print_address(struct sockaddr *);
  232 void sctp_print_address_pkt(struct ip *, struct sctphdr *);
  233 
  234 void
  235 sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb,
  236     uint32_t error, int no_lock, uint32_t strseq);
  237 
  238 int
  239 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  240     int, struct sctpchunk_listhead *, int
  241 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  242     SCTP_UNUSED
  243 #endif
  244 );
  245 
  246 struct mbuf *sctp_generate_invmanparam(int);
  247 
  248 void 
  249 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
  250     struct sockaddr *sa, sctp_assoc_t assoc_id,
  251     uint32_t vrf_id, int *error, void *p);
  252 void 
  253 sctp_bindx_delete_address(struct socket *so, struct sctp_inpcb *inp,
  254     struct sockaddr *sa, sctp_assoc_t assoc_id,
  255     uint32_t vrf_id, int *error);
  256 
  257 int sctp_local_addr_count(struct sctp_tcb *stcb);
  258 
  259 #ifdef SCTP_MBCNT_LOGGING
  260 void
  261 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
  262     struct sctp_tmit_chunk *, int);
  263 
  264 #else
  265 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)  \
  266 do { \
  267         if (tp1->data != NULL) { \
  268                 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \
  269                 if ((asoc)->total_output_queue_size >= tp1->book_size) { \
  270                         atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \
  271                 } else { \
  272                         (asoc)->total_output_queue_size = 0; \
  273                 } \
  274                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  275                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  276                         if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \
  277                                 atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); \
  278                         } else { \
  279                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  280                         } \
  281                 } \
  282         } \
  283 } while (0)
  284 
  285 #endif
  286 
  287 #define sctp_free_spbufspace(stcb, asoc, sp)  \
  288 do { \
  289         if (sp->data != NULL) { \
  290                 atomic_subtract_int(&(asoc)->chunks_on_out_queue, 1); \
  291                 if ((asoc)->total_output_queue_size >= sp->length) { \
  292                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  293                 } else { \
  294                         (asoc)->total_output_queue_size = 0; \
  295                 } \
  296                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  297                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  298                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  299                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  300                         } else { \
  301                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  302                         } \
  303                 } \
  304         } \
  305 } while (0)
  306 
  307 #define sctp_snd_sb_alloc(stcb, sz)  \
  308 do { \
  309         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  310         if ((stcb->sctp_socket != NULL) && \
  311             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  312              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  313                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  314         } \
  315 } while (0)
  316 
  317 /* new functions to start/stop udp tunneling */
  318 void sctp_over_udp_stop(void);
  319 int sctp_over_udp_start(void);
  320 
  321 int
  322 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  323     struct uio *uio,
  324     struct mbuf **mp0,
  325     struct mbuf **controlp,
  326     int *flagsp);
  327 
  328 
  329 /* For those not passing mbufs, this does the
  330  * translations for you. Caller owns memory
  331  * of size controllen returned in controlp.
  332  */
  333 int 
  334 sctp_l_soreceive(struct socket *so,
  335     struct sockaddr **name,
  336     struct uio *uio,
  337     char **controlp,
  338     int *controllen,
  339     int *flag);
  340 
  341 
  342 void
  343      sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
  344 
  345 void
  346 sctp_wakeup_log(struct sctp_tcb *stcb,
  347     uint32_t cumtsn,
  348     uint32_t wake_cnt, int from);
  349 
  350 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
  351 
  352 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
  353 
  354 
  355 void
  356      sctp_log_mb(struct mbuf *m, int from);
  357 
  358 void
  359 sctp_sblog(struct sockbuf *sb,
  360     struct sctp_tcb *stcb, int from, int incr);
  361 
  362 void
  363 sctp_log_strm_del(struct sctp_queued_to_read *control,
  364     struct sctp_queued_to_read *poschk,
  365     int from);
  366 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  367 void rto_logging(struct sctp_nets *net, int from);
  368 
  369 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  370 
  371 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  372 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  373 void sctp_log_block(uint8_t, struct socket *, struct sctp_association *, int);
  374 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  375 void sctp_log_mbcnt(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  376 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  377 int sctp_fill_stat_log(void *, size_t *);
  378 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
  379 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
  380 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
  381 
  382 void sctp_clr_stat_log(void);
  383 
  384 
  385 #ifdef SCTP_AUDITING_ENABLED
  386 void
  387 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
  388     struct sctp_nets *);
  389 void sctp_audit_log(uint8_t, uint8_t);
  390 
  391 #endif
  392 
  393 
  394 #endif                          /* _KERNEL */
  395 #endif

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