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  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
    5  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
    6  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions are met:
   10  *
   11  * a) Redistributions of source code must retain the above copyright notice,
   12  *    this list of conditions and the following disclaimer.
   13  *
   14  * b) Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in
   16  *    the documentation and/or other materials provided with the distribution.
   17  *
   18  * c) Neither the name of Cisco Systems, Inc. nor the names of its
   19  *    contributors may be used to endorse or promote products derived
   20  *    from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   32  * THE POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD: releng/12.0/sys/netinet/sctputil.h 338134 2018-08-21 13:25:32Z tuexen $");
   37 
   38 #ifndef _NETINET_SCTP_UTIL_H_
   39 #define _NETINET_SCTP_UTIL_H_
   40 
   41 #if defined(_KERNEL) || defined(__Userspace__)
   42 
   43 #define SCTP_READ_LOCK_HELD 1
   44 #define SCTP_READ_LOCK_NOT_HELD 0
   45 
   46 #ifdef SCTP_ASOCLOG_OF_TSNS
   47 void sctp_print_out_track_log(struct sctp_tcb *stcb);
   48 #endif
   49 
   50 #ifdef SCTP_MBUF_LOGGING
   51 struct mbuf *sctp_m_free(struct mbuf *m);
   52 void sctp_m_freem(struct mbuf *m);
   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 #endif
   62 
   63 #define sctp_get_associd(stcb) ((sctp_assoc_t)stcb->asoc.assoc_id)
   64 
   65 
   66 /*
   67  * Function prototypes
   68  */
   69 int32_t
   70         sctp_map_assoc_state(int);
   71 
   72 uint32_t
   73          sctp_get_ifa_hash_val(struct sockaddr *addr);
   74 
   75 struct sctp_ifa *sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, int hold_lock);
   76 
   77 struct sctp_ifa *sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock);
   78 
   79 uint32_t sctp_select_initial_TSN(struct sctp_pcb *);
   80 
   81 uint32_t sctp_select_a_tag(struct sctp_inpcb *, uint16_t lport, uint16_t rport, int);
   82 
   83 int sctp_init_asoc(struct sctp_inpcb *, struct sctp_tcb *, uint32_t, uint32_t, uint16_t);
   84 
   85 void sctp_fill_random_store(struct sctp_pcb *);
   86 
   87 void
   88 sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin,
   89     uint16_t numberout, int flag);
   90 void
   91      sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag);
   92 
   93 void
   94 sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,
   95     struct sctp_nets *);
   96 
   97 void
   98 sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,
   99     struct sctp_nets *, uint32_t);
  100 
  101 int
  102     sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id);
  103 
  104 void
  105      sctp_mtu_size_reset(struct sctp_inpcb *, struct sctp_association *, uint32_t);
  106 
  107 void
  108 sctp_wakeup_the_read_socket(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
  109     int so_locked
  110 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  111     SCTP_UNUSED
  112 #endif
  113 );
  114 
  115 void
  116 sctp_add_to_readq(struct sctp_inpcb *inp,
  117     struct sctp_tcb *stcb,
  118     struct sctp_queued_to_read *control,
  119     struct sockbuf *sb,
  120     int end,
  121     int inpread_locked,
  122     int so_locked
  123 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  124     SCTP_UNUSED
  125 #endif
  126 );
  127 
  128 void sctp_iterator_worker(void);
  129 
  130 uint32_t sctp_get_prev_mtu(uint32_t);
  131 uint32_t sctp_get_next_mtu(uint32_t);
  132 
  133 void
  134      sctp_timeout_handler(void *);
  135 
  136 uint32_t
  137 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
  138     struct sctp_nets *, struct timeval *, int);
  139 
  140 uint32_t sctp_calculate_len(struct mbuf *);
  141 
  142 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
  143 
  144 struct sctp_paramhdr *
  145 sctp_get_next_param(struct mbuf *, int,
  146     struct sctp_paramhdr *, int);
  147 
  148 struct mbuf *sctp_add_pad_tombuf(struct mbuf *, int);
  149 
  150 struct mbuf *sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
  151 
  152 void
  153 sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int
  154 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  155     SCTP_UNUSED
  156 #endif
  157 );
  158 
  159 void
  160 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
  161     struct sctp_inpcb *new_inp,
  162     struct sctp_tcb *stcb, int waitflags);
  163 
  164 
  165 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
  166 
  167 void
  168 sctp_report_all_outbound(struct sctp_tcb *, uint16_t, int, int
  169 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  170     SCTP_UNUSED
  171 #endif
  172 );
  173 
  174 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);
  175 
  176 void
  177 sctp_abort_notification(struct sctp_tcb *, uint8_t, uint16_t,
  178     struct sctp_abort_chunk *, int
  179 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  180     SCTP_UNUSED
  181 #endif
  182 );
  183 
  184 /* We abort responding to an IP packet for some reason */
  185 void
  186 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *, struct mbuf *,
  187     int, struct sockaddr *, struct sockaddr *,
  188     struct sctphdr *, struct mbuf *,
  189     uint8_t, uint32_t,
  190     uint32_t, uint16_t);
  191 
  192 
  193 /* We choose to abort via user input */
  194 void
  195 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *,
  196     struct mbuf *, int
  197 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  198     SCTP_UNUSED
  199 #endif
  200 );
  201 
  202 void
  203 sctp_handle_ootb(struct mbuf *, int, int,
  204     struct sockaddr *, struct sockaddr *,
  205     struct sctphdr *, struct sctp_inpcb *,
  206     struct mbuf *,
  207     uint8_t, uint32_t, uint16_t,
  208     uint32_t, uint16_t);
  209 
  210 int
  211 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
  212     int totaddr, int *error);
  213 
  214 struct sctp_tcb *
  215 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
  216     unsigned int *totaddr, unsigned int *num_v4, unsigned int *num_v6,
  217     int *error, unsigned int limit, int *bad_addr);
  218 
  219 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
  220 #ifdef INET6
  221 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  222 
  223 struct sockaddr_in6 *sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  224 
  225 #define sctp_recover_scope_mac(addr, store) do { \
  226          if ((addr->sin6_family == AF_INET6) && \
  227              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  228                 *store = *addr; \
  229                 if (addr->sin6_scope_id == 0) { \
  230                         if (!sa6_recoverscope(store)) { \
  231                                 addr = store; \
  232                         } \
  233                 } else { \
  234                         in6_clearscope(&addr->sin6_addr); \
  235                         addr = store; \
  236                 } \
  237          } \
  238 } while (0)
  239 #endif
  240 
  241 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  242 
  243 void sctp_print_address(struct sockaddr *);
  244 
  245 int
  246 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  247     uint8_t, int
  248 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  249     SCTP_UNUSED
  250 #endif
  251 );
  252 
  253 struct mbuf *sctp_generate_cause(uint16_t, char *);
  254 struct mbuf *sctp_generate_no_user_data_cause(uint32_t);
  255 
  256 void
  257 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
  258     struct sockaddr *sa, sctp_assoc_t assoc_id,
  259     uint32_t vrf_id, int *error, void *p);
  260 void
  261 sctp_bindx_delete_address(struct sctp_inpcb *inp,
  262     struct sockaddr *sa, sctp_assoc_t assoc_id,
  263     uint32_t vrf_id, int *error);
  264 
  265 int sctp_local_addr_count(struct sctp_tcb *stcb);
  266 
  267 #ifdef SCTP_MBCNT_LOGGING
  268 void
  269 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
  270     struct sctp_tmit_chunk *, int);
  271 
  272 #else
  273 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)  \
  274 do { \
  275         if (tp1->data != NULL) { \
  276                 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \
  277                 if ((asoc)->total_output_queue_size >= tp1->book_size) { \
  278                         atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \
  279                 } else { \
  280                         (asoc)->total_output_queue_size = 0; \
  281                 } \
  282                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  283                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  284                         if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \
  285                                 atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); \
  286                         } else { \
  287                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  288                         } \
  289                 } \
  290         } \
  291 } while (0)
  292 
  293 #endif
  294 
  295 #define sctp_free_spbufspace(stcb, asoc, sp)  \
  296 do { \
  297         if (sp->data != NULL) { \
  298                 if ((asoc)->total_output_queue_size >= sp->length) { \
  299                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  300                 } else { \
  301                         (asoc)->total_output_queue_size = 0; \
  302                 } \
  303                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  304                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  305                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  306                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  307                         } else { \
  308                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  309                         } \
  310                 } \
  311         } \
  312 } while (0)
  313 
  314 #define sctp_snd_sb_alloc(stcb, sz)  \
  315 do { \
  316         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  317         if ((stcb->sctp_socket != NULL) && \
  318             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  319              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  320                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  321         } \
  322 } while (0)
  323 
  324 /* functions to start/stop udp tunneling */
  325 void sctp_over_udp_stop(void);
  326 int sctp_over_udp_start(void);
  327 
  328 int
  329 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  330     struct uio *uio,
  331     struct mbuf **mp0,
  332     struct mbuf **controlp,
  333     int *flagsp);
  334 
  335 void
  336      sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
  337 
  338 void
  339 sctp_wakeup_log(struct sctp_tcb *stcb,
  340     uint32_t wake_cnt, int from);
  341 
  342 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
  343 
  344 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
  345 
  346 
  347 #ifdef SCTP_MBUF_LOGGING
  348 void
  349      sctp_log_mb(struct mbuf *m, int from);
  350 
  351 void
  352      sctp_log_mbc(struct mbuf *m, int from);
  353 #endif
  354 
  355 void
  356 sctp_sblog(struct sockbuf *sb,
  357     struct sctp_tcb *stcb, int from, int incr);
  358 
  359 void
  360 sctp_log_strm_del(struct sctp_queued_to_read *control,
  361     struct sctp_queued_to_read *poschk,
  362     int from);
  363 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  364 void rto_logging(struct sctp_nets *net, int from);
  365 
  366 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  367 
  368 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  369 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  370 void sctp_log_block(uint8_t, struct sctp_association *, size_t);
  371 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  372 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  373 int sctp_fill_stat_log(void *, size_t *);
  374 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
  375 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
  376 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
  377 void sctp_print_mapping_array(struct sctp_association *asoc);
  378 void sctp_clr_stat_log(void);
  379 
  380 
  381 #ifdef SCTP_AUDITING_ENABLED
  382 void
  383 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
  384     struct sctp_nets *);
  385 void sctp_audit_log(uint8_t, uint8_t);
  386 
  387 #endif
  388 uint32_t sctp_min_mtu(uint32_t, uint32_t, uint32_t);
  389 void sctp_hc_set_mtu(union sctp_sockstore *, uint16_t, uint32_t);
  390 uint32_t sctp_hc_get_mtu(union sctp_sockstore *, uint16_t);
  391 void sctp_set_state(struct sctp_tcb *, int);
  392 void sctp_add_substate(struct sctp_tcb *, int);
  393 #endif                          /* _KERNEL */
  394 #endif

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