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  * 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: releng/11.0/sys/netinet/sctputil.h 298508 2016-04-23 09:15:58Z tuexen $");
   35 
   36 #ifndef _NETINET_SCTP_UTIL_H_
   37 #define _NETINET_SCTP_UTIL_H_
   38 
   39 #if defined(_KERNEL) || defined(__Userspace__)
   40 
   41 #define SCTP_READ_LOCK_HELD 1
   42 #define SCTP_READ_LOCK_NOT_HELD 0
   43 
   44 #ifdef SCTP_ASOCLOG_OF_TSNS
   45 void sctp_print_out_track_log(struct sctp_tcb *stcb);
   46 
   47 #endif
   48 
   49 #ifdef SCTP_MBUF_LOGGING
   50 struct mbuf *sctp_m_free(struct mbuf *m);
   51 void sctp_m_freem(struct mbuf *m);
   52 
   53 #else
   54 #define sctp_m_free m_free
   55 #define sctp_m_freem m_freem
   56 #endif
   57 
   58 #if defined(SCTP_LOCAL_TRACE_BUF) || defined(__APPLE__)
   59 void
   60      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);
   61 
   62 #endif
   63 
   64 #define sctp_get_associd(stcb) ((sctp_assoc_t)stcb->asoc.assoc_id)
   65 
   66 
   67 /*
   68  * Function prototypes
   69  */
   70 int32_t
   71 sctp_map_assoc_state(int);
   72 
   73 uint32_t
   74 sctp_get_ifa_hash_val(struct sockaddr *addr);
   75 
   76 struct sctp_ifa *
   77          sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, int hold_lock);
   78 
   79 struct sctp_ifa *
   80          sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock);
   81 
   82 uint32_t sctp_select_initial_TSN(struct sctp_pcb *);
   83 
   84 uint32_t sctp_select_a_tag(struct sctp_inpcb *, uint16_t lport, uint16_t rport, int);
   85 
   86 int sctp_init_asoc(struct sctp_inpcb *, struct sctp_tcb *, uint32_t, uint32_t, uint16_t);
   87 
   88 void sctp_fill_random_store(struct sctp_pcb *);
   89 
   90 void
   91 sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin,
   92     uint16_t numberout, int flag);
   93 void
   94      sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag);
   95 
   96 void
   97 sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,
   98     struct sctp_nets *);
   99 
  100 void
  101 sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,
  102     struct sctp_nets *, uint32_t);
  103 
  104 int
  105     sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id);
  106 
  107 void
  108      sctp_mtu_size_reset(struct sctp_inpcb *, struct sctp_association *, uint32_t);
  109 
  110 void
  111 sctp_wakeup_the_read_socket(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
  112     int so_locked
  113 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  114     SCTP_UNUSED
  115 #endif
  116 );
  117 
  118 void
  119 sctp_add_to_readq(struct sctp_inpcb *inp,
  120     struct sctp_tcb *stcb,
  121     struct sctp_queued_to_read *control,
  122     struct sockbuf *sb,
  123     int end,
  124     int inpread_locked,
  125     int so_locked
  126 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  127     SCTP_UNUSED
  128 #endif
  129 );
  130 
  131 void sctp_iterator_worker(void);
  132 
  133 uint32_t sctp_get_prev_mtu(uint32_t);
  134 uint32_t sctp_get_next_mtu(uint32_t);
  135 
  136 void
  137      sctp_timeout_handler(void *);
  138 
  139 uint32_t
  140 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
  141     struct sctp_nets *, struct timeval *, int, int);
  142 
  143 uint32_t sctp_calculate_len(struct mbuf *);
  144 
  145 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
  146 
  147 struct sctp_paramhdr *
  148 sctp_get_next_param(struct mbuf *, int,
  149     struct sctp_paramhdr *, int);
  150 
  151 struct mbuf *
  152      sctp_add_pad_tombuf(struct mbuf *, int);
  153 
  154 struct mbuf *
  155      sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
  156 
  157 void 
  158 sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int
  159 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  160     SCTP_UNUSED
  161 #endif
  162 );
  163 
  164 void
  165 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
  166     struct sctp_inpcb *new_inp,
  167     struct sctp_tcb *stcb, int waitflags);
  168 
  169 
  170 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
  171 
  172 void 
  173 sctp_report_all_outbound(struct sctp_tcb *, uint16_t, int, int
  174 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  175     SCTP_UNUSED
  176 #endif
  177 );
  178 
  179 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);
  180 
  181 void 
  182 sctp_abort_notification(struct sctp_tcb *, uint8_t, uint16_t,
  183     struct sctp_abort_chunk *, int
  184 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  185     SCTP_UNUSED
  186 #endif
  187 );
  188 
  189 /* We abort responding to an IP packet for some reason */
  190 void
  191 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *, struct mbuf *,
  192     int, struct sockaddr *, struct sockaddr *,
  193     struct sctphdr *, struct mbuf *,
  194     uint8_t, uint32_t,
  195     uint32_t, uint16_t);
  196 
  197 
  198 /* We choose to abort via user input */
  199 void
  200 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *,
  201     struct mbuf *, int
  202 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  203     SCTP_UNUSED
  204 #endif
  205 );
  206 
  207 void 
  208 sctp_handle_ootb(struct mbuf *, int, int,
  209     struct sockaddr *, struct sockaddr *,
  210     struct sctphdr *, struct sctp_inpcb *,
  211     struct mbuf *,
  212     uint8_t, uint32_t, uint16_t,
  213     uint32_t, uint16_t);
  214 
  215 int 
  216 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
  217     int totaddr, int *error);
  218 
  219 struct sctp_tcb *
  220 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
  221     unsigned int *totaddr, unsigned int *num_v4, unsigned int *num_v6,
  222     int *error, unsigned int limit, int *bad_addr);
  223 
  224 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
  225 
  226 #ifdef INET6
  227 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  228 
  229 struct sockaddr_in6 *
  230              sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  231 
  232 #define sctp_recover_scope_mac(addr, store) do { \
  233          if ((addr->sin6_family == AF_INET6) && \
  234              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  235                 *store = *addr; \
  236                 if (addr->sin6_scope_id == 0) { \
  237                         if (!sa6_recoverscope(store)) { \
  238                                 addr = store; \
  239                         } \
  240                 } else { \
  241                         in6_clearscope(&addr->sin6_addr); \
  242                         addr = store; \
  243                 } \
  244          } \
  245 } while (0)
  246 #endif
  247 
  248 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  249 
  250 void sctp_print_address(struct sockaddr *);
  251 
  252 int
  253 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  254     uint8_t, int
  255 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  256     SCTP_UNUSED
  257 #endif
  258 );
  259 
  260 struct mbuf *sctp_generate_cause(uint16_t, char *);
  261 struct mbuf *sctp_generate_no_user_data_cause(uint32_t);
  262 
  263 void 
  264 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
  265     struct sockaddr *sa, sctp_assoc_t assoc_id,
  266     uint32_t vrf_id, int *error, void *p);
  267 void 
  268 sctp_bindx_delete_address(struct sctp_inpcb *inp,
  269     struct sockaddr *sa, sctp_assoc_t assoc_id,
  270     uint32_t vrf_id, int *error);
  271 
  272 int sctp_local_addr_count(struct sctp_tcb *stcb);
  273 
  274 #ifdef SCTP_MBCNT_LOGGING
  275 void
  276 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
  277     struct sctp_tmit_chunk *, int);
  278 
  279 #else
  280 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)  \
  281 do { \
  282         if (tp1->data != NULL) { \
  283                 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \
  284                 if ((asoc)->total_output_queue_size >= tp1->book_size) { \
  285                         atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \
  286                 } else { \
  287                         (asoc)->total_output_queue_size = 0; \
  288                 } \
  289                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  290                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  291                         if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \
  292                                 atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); \
  293                         } else { \
  294                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  295                         } \
  296                 } \
  297         } \
  298 } while (0)
  299 
  300 #endif
  301 
  302 #define sctp_free_spbufspace(stcb, asoc, sp)  \
  303 do { \
  304         if (sp->data != NULL) { \
  305                 if ((asoc)->total_output_queue_size >= sp->length) { \
  306                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  307                 } else { \
  308                         (asoc)->total_output_queue_size = 0; \
  309                 } \
  310                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  311                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  312                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  313                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  314                         } else { \
  315                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  316                         } \
  317                 } \
  318         } \
  319 } while (0)
  320 
  321 #define sctp_snd_sb_alloc(stcb, sz)  \
  322 do { \
  323         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  324         if ((stcb->sctp_socket != NULL) && \
  325             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  326              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  327                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  328         } \
  329 } while (0)
  330 
  331 /* functions to start/stop udp tunneling */
  332 void sctp_over_udp_stop(void);
  333 int sctp_over_udp_start(void);
  334 
  335 int
  336 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  337     struct uio *uio,
  338     struct mbuf **mp0,
  339     struct mbuf **controlp,
  340     int *flagsp);
  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 wake_cnt, int from);
  348 
  349 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
  350 
  351 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
  352 
  353 
  354 #ifdef SCTP_MBUF_LOGGING
  355 void
  356      sctp_log_mb(struct mbuf *m, int from);
  357 
  358 void
  359      sctp_log_mbc(struct mbuf *m, int from);
  360 
  361 #endif
  362 
  363 void
  364 sctp_sblog(struct sockbuf *sb,
  365     struct sctp_tcb *stcb, int from, int incr);
  366 
  367 void
  368 sctp_log_strm_del(struct sctp_queued_to_read *control,
  369     struct sctp_queued_to_read *poschk,
  370     int from);
  371 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  372 void rto_logging(struct sctp_nets *net, int from);
  373 
  374 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  375 
  376 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  377 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  378 void sctp_log_block(uint8_t, struct sctp_association *, size_t);
  379 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  380 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  381 int sctp_fill_stat_log(void *, size_t *);
  382 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
  383 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
  384 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
  385 void sctp_print_mapping_array(struct sctp_association *asoc);
  386 void sctp_clr_stat_log(void);
  387 
  388 
  389 #ifdef SCTP_AUDITING_ENABLED
  390 void
  391 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
  392     struct sctp_nets *);
  393 void sctp_audit_log(uint8_t, uint8_t);
  394 
  395 #endif
  396 #endif                          /* _KERNEL */
  397 #endif

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