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("$FreeBSD$");
   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_add_to_readq(struct sctp_inpcb *inp,
  112     struct sctp_tcb *stcb,
  113     struct sctp_queued_to_read *control,
  114     struct sockbuf *sb,
  115     int end,
  116     int inpread_locked,
  117     int so_locked
  118 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  119     SCTP_UNUSED
  120 #endif
  121 );
  122 
  123 int
  124 sctp_append_to_readq(struct sctp_inpcb *inp,
  125     struct sctp_tcb *stcb,
  126     struct sctp_queued_to_read *control,
  127     struct mbuf *m,
  128     int end,
  129     int new_cumack,
  130     struct sockbuf *sb);
  131 
  132 
  133 void sctp_iterator_worker(void);
  134 
  135 uint32_t sctp_get_prev_mtu(uint32_t);
  136 uint32_t sctp_get_next_mtu(uint32_t);
  137 
  138 void
  139      sctp_timeout_handler(void *);
  140 
  141 uint32_t
  142 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
  143     struct sctp_nets *, struct timeval *, int, int);
  144 
  145 uint32_t sctp_calculate_len(struct mbuf *);
  146 
  147 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
  148 
  149 struct sctp_paramhdr *
  150 sctp_get_next_param(struct mbuf *, int,
  151     struct sctp_paramhdr *, int);
  152 
  153 struct mbuf *
  154      sctp_add_pad_tombuf(struct mbuf *, int);
  155 
  156 struct mbuf *
  157      sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
  158 
  159 void 
  160 sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int
  161 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  162     SCTP_UNUSED
  163 #endif
  164 );
  165 
  166 void
  167 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
  168     struct sctp_inpcb *new_inp,
  169     struct sctp_tcb *stcb, int waitflags);
  170 
  171 
  172 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
  173 
  174 void 
  175 sctp_report_all_outbound(struct sctp_tcb *, uint16_t, int, int
  176 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  177     SCTP_UNUSED
  178 #endif
  179 );
  180 
  181 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);
  182 
  183 void 
  184 sctp_abort_notification(struct sctp_tcb *, uint8_t, uint16_t,
  185     struct sctp_abort_chunk *, int
  186 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  187     SCTP_UNUSED
  188 #endif
  189 );
  190 
  191 /* We abort responding to an IP packet for some reason */
  192 void
  193 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *, struct mbuf *,
  194     int, struct sockaddr *, struct sockaddr *,
  195     struct sctphdr *, struct mbuf *,
  196     uint8_t, uint32_t,
  197     uint32_t, uint16_t);
  198 
  199 
  200 /* We choose to abort via user input */
  201 void
  202 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *,
  203     struct mbuf *, int
  204 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  205     SCTP_UNUSED
  206 #endif
  207 );
  208 
  209 void 
  210 sctp_handle_ootb(struct mbuf *, int, int,
  211     struct sockaddr *, struct sockaddr *,
  212     struct sctphdr *, struct sctp_inpcb *,
  213     struct mbuf *,
  214     uint8_t, uint32_t, uint16_t,
  215     uint32_t, uint16_t);
  216 
  217 int 
  218 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
  219     int totaddr, int *error);
  220 
  221 struct sctp_tcb *
  222 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
  223     int *totaddr, int *num_v4, int *num_v6, int *error, int limit, int *bad_addr);
  224 
  225 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
  226 
  227 #ifdef INET6
  228 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  229 
  230 struct sockaddr_in6 *
  231              sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  232 
  233 #define sctp_recover_scope_mac(addr, store) do { \
  234          if ((addr->sin6_family == AF_INET6) && \
  235              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  236                 *store = *addr; \
  237                 if (addr->sin6_scope_id == 0) { \
  238                         if (!sa6_recoverscope(store)) { \
  239                                 addr = store; \
  240                         } \
  241                 } else { \
  242                         in6_clearscope(&addr->sin6_addr); \
  243                         addr = store; \
  244                 } \
  245          } \
  246 } while (0)
  247 #endif
  248 
  249 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  250 
  251 void sctp_print_address(struct sockaddr *);
  252 
  253 int
  254 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  255     uint8_t, int
  256 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  257     SCTP_UNUSED
  258 #endif
  259 );
  260 
  261 struct mbuf *sctp_generate_cause(uint16_t, char *);
  262 struct mbuf *sctp_generate_no_user_data_cause(uint32_t);
  263 
  264 void 
  265 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
  266     struct sockaddr *sa, sctp_assoc_t assoc_id,
  267     uint32_t vrf_id, int *error, void *p);
  268 void 
  269 sctp_bindx_delete_address(struct sctp_inpcb *inp,
  270     struct sockaddr *sa, sctp_assoc_t assoc_id,
  271     uint32_t vrf_id, int *error);
  272 
  273 int sctp_local_addr_count(struct sctp_tcb *stcb);
  274 
  275 #ifdef SCTP_MBCNT_LOGGING
  276 void
  277 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
  278     struct sctp_tmit_chunk *, int);
  279 
  280 #else
  281 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)  \
  282 do { \
  283         if (tp1->data != NULL) { \
  284                 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \
  285                 if ((asoc)->total_output_queue_size >= tp1->book_size) { \
  286                         atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \
  287                 } else { \
  288                         (asoc)->total_output_queue_size = 0; \
  289                 } \
  290                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  291                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  292                         if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \
  293                                 atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); \
  294                         } else { \
  295                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  296                         } \
  297                 } \
  298         } \
  299 } while (0)
  300 
  301 #endif
  302 
  303 #define sctp_free_spbufspace(stcb, asoc, sp)  \
  304 do { \
  305         if (sp->data != NULL) { \
  306                 if ((asoc)->total_output_queue_size >= sp->length) { \
  307                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  308                 } else { \
  309                         (asoc)->total_output_queue_size = 0; \
  310                 } \
  311                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  312                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  313                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  314                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  315                         } else { \
  316                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  317                         } \
  318                 } \
  319         } \
  320 } while (0)
  321 
  322 #define sctp_snd_sb_alloc(stcb, sz)  \
  323 do { \
  324         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  325         if ((stcb->sctp_socket != NULL) && \
  326             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  327              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  328                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  329         } \
  330 } while (0)
  331 
  332 /* functions to start/stop udp tunneling */
  333 void sctp_over_udp_stop(void);
  334 int sctp_over_udp_start(void);
  335 
  336 int
  337 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  338     struct uio *uio,
  339     struct mbuf **mp0,
  340     struct mbuf **controlp,
  341     int *flagsp);
  342 
  343 void
  344      sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
  345 
  346 void
  347 sctp_wakeup_log(struct sctp_tcb *stcb,
  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 #ifdef SCTP_MBUF_LOGGING
  356 void
  357      sctp_log_mb(struct mbuf *m, int from);
  358 
  359 void
  360      sctp_log_mbc(struct mbuf *m, int from);
  361 
  362 #endif
  363 
  364 void
  365 sctp_sblog(struct sockbuf *sb,
  366     struct sctp_tcb *stcb, int from, int incr);
  367 
  368 void
  369 sctp_log_strm_del(struct sctp_queued_to_read *control,
  370     struct sctp_queued_to_read *poschk,
  371     int from);
  372 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  373 void rto_logging(struct sctp_nets *net, int from);
  374 
  375 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  376 
  377 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  378 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  379 void sctp_log_block(uint8_t, struct sctp_association *, int);
  380 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  381 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  382 int sctp_fill_stat_log(void *, size_t *);
  383 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
  384 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
  385 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
  386 void sctp_print_mapping_array(struct sctp_association *asoc);
  387 void sctp_clr_stat_log(void);
  388 
  389 
  390 #ifdef SCTP_AUDITING_ENABLED
  391 void
  392 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
  393     struct sctp_nets *);
  394 void sctp_audit_log(uint8_t, uint8_t);
  395 
  396 #endif
  397 #endif                          /* _KERNEL */
  398 #endif

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