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: releng/8.1/sys/netinet/sctputil.h 206742 2010-04-17 04:15:46Z rrs $");
   36 #ifndef __sctputil_h__
   37 #define __sctputil_h__
   38 
   39 
   40 #if defined(_KERNEL) || defined(__Userspace__)
   41 
   42 #define SCTP_READ_LOCK_HELD 1
   43 #define SCTP_READ_LOCK_NOT_HELD 0
   44 
   45 #ifdef SCTP_ASOCLOG_OF_TSNS
   46 void sctp_print_out_track_log(struct sctp_tcb *stcb);
   47 
   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 
   54 #else
   55 #define sctp_m_free m_free
   56 #define sctp_m_freem m_freem
   57 #endif
   58 
   59 #if defined(SCTP_LOCAL_TRACE_BUF) || defined(__APPLE__)
   60 void
   61      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);
   62 
   63 #endif
   64 
   65 #define sctp_get_associd(stcb) ((sctp_assoc_t)stcb->asoc.assoc_id)
   66 
   67 
   68 /*
   69  * Function prototypes
   70  */
   71 uint32_t
   72 sctp_get_ifa_hash_val(struct sockaddr *addr);
   73 
   74 struct sctp_ifa *
   75          sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, int hold_lock);
   76 
   77 struct sctp_ifa *
   78          sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock);
   79 
   80 uint32_t sctp_select_initial_TSN(struct sctp_pcb *);
   81 
   82 uint32_t sctp_select_a_tag(struct sctp_inpcb *, uint16_t lport, uint16_t rport, int);
   83 
   84 int sctp_init_asoc(struct sctp_inpcb *, struct sctp_tcb *, uint32_t, uint32_t);
   85 
   86 void sctp_fill_random_store(struct sctp_pcb *);
   87 
   88 void
   89 sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,
   90     struct sctp_nets *);
   91 
   92 void
   93 sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,
   94     struct sctp_nets *, uint32_t);
   95 
   96 int
   97     sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id);
   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 inpread_locked,
  109     int so_locked
  110 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  111     SCTP_UNUSED
  112 #endif
  113 );
  114 
  115 int
  116 sctp_append_to_readq(struct sctp_inpcb *inp,
  117     struct sctp_tcb *stcb,
  118     struct sctp_queued_to_read *control,
  119     struct mbuf *m,
  120     int end,
  121     int new_cumack,
  122     struct sockbuf *sb);
  123 
  124 
  125 void sctp_iterator_worker(void);
  126 
  127 int find_next_best_mtu(int);
  128 
  129 void
  130      sctp_timeout_handler(void *);
  131 
  132 uint32_t
  133 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
  134     struct sctp_nets *, struct timeval *, int);
  135 
  136 uint32_t sctp_calculate_len(struct mbuf *);
  137 
  138 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
  139 
  140 struct sctp_paramhdr *
  141 sctp_get_next_param(struct mbuf *, int,
  142     struct sctp_paramhdr *, int);
  143 
  144 int sctp_add_pad_tombuf(struct mbuf *, int);
  145 
  146 int sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
  147 
  148 void 
  149 sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int
  150 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  151     SCTP_UNUSED
  152 #endif
  153 );
  154 
  155 void
  156 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
  157     struct sctp_inpcb *new_inp,
  158     struct sctp_tcb *stcb, int waitflags);
  159 
  160 
  161 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
  162 
  163 void 
  164 sctp_report_all_outbound(struct sctp_tcb *, int, int
  165 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  166     SCTP_UNUSED
  167 #endif
  168 );
  169 
  170 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);
  171 
  172 void 
  173 sctp_abort_notification(struct sctp_tcb *, int, int
  174 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  175     SCTP_UNUSED
  176 #endif
  177 );
  178 
  179 /* We abort responding to an IP packet for some reason */
  180 void
  181 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *,
  182     struct mbuf *, int, struct sctphdr *, struct mbuf *, uint32_t, uint16_t);
  183 
  184 
  185 /* We choose to abort via user input */
  186 void
  187 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *, int,
  188     struct mbuf *, int
  189 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  190     SCTP_UNUSED
  191 #endif
  192 );
  193 
  194 void 
  195 sctp_handle_ootb(struct mbuf *, int, int, struct sctphdr *,
  196     struct sctp_inpcb *, struct mbuf *, uint32_t, uint16_t);
  197 
  198 int 
  199 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
  200     int totaddr, int *error);
  201 
  202 struct sctp_tcb *
  203 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
  204     int *totaddr, int *num_v4, int *num_v6, int *error, int limit, int *bad_addr);
  205 
  206 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
  207 
  208 #ifdef INET6
  209 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  210 
  211 struct sockaddr_in6 *
  212              sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  213 
  214 #define sctp_recover_scope_mac(addr, store) do { \
  215          if ((addr->sin6_family == AF_INET6) && \
  216              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  217                 *store = *addr; \
  218                 if (addr->sin6_scope_id == 0) { \
  219                         if (!sa6_recoverscope(store)) { \
  220                                 addr = store; \
  221                         } \
  222                 } else { \
  223                         in6_clearscope(&addr->sin6_addr); \
  224                         addr = store; \
  225                 } \
  226          } \
  227 } while (0)
  228 #endif
  229 
  230 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  231 
  232 void sctp_print_address(struct sockaddr *);
  233 void sctp_print_address_pkt(struct ip *, struct sctphdr *);
  234 
  235 int
  236 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  237     int, int
  238 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  239     SCTP_UNUSED
  240 #endif
  241 );
  242 
  243 struct mbuf *sctp_generate_invmanparam(int);
  244 
  245 void 
  246 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
  247     struct sockaddr *sa, sctp_assoc_t assoc_id,
  248     uint32_t vrf_id, int *error, void *p);
  249 void 
  250 sctp_bindx_delete_address(struct socket *so, struct sctp_inpcb *inp,
  251     struct sockaddr *sa, sctp_assoc_t assoc_id,
  252     uint32_t vrf_id, int *error);
  253 
  254 int sctp_local_addr_count(struct sctp_tcb *stcb);
  255 
  256 #ifdef SCTP_MBCNT_LOGGING
  257 void
  258 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
  259     struct sctp_tmit_chunk *, int);
  260 
  261 #else
  262 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt)  \
  263 do { \
  264         if (tp1->data != NULL) { \
  265                 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \
  266                 if ((asoc)->total_output_queue_size >= tp1->book_size) { \
  267                         atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \
  268                 } else { \
  269                         (asoc)->total_output_queue_size = 0; \
  270                 } \
  271                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  272                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  273                         if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) { \
  274                                 atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_cc), tp1->book_size); \
  275                         } else { \
  276                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  277                         } \
  278                 } \
  279         } \
  280 } while (0)
  281 
  282 #endif
  283 
  284 #define sctp_free_spbufspace(stcb, asoc, sp)  \
  285 do { \
  286         if (sp->data != NULL) { \
  287                 if ((asoc)->total_output_queue_size >= sp->length) { \
  288                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  289                 } else { \
  290                         (asoc)->total_output_queue_size = 0; \
  291                 } \
  292                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  293                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  294                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  295                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  296                         } else { \
  297                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  298                         } \
  299                 } \
  300         } \
  301 } while (0)
  302 
  303 #define sctp_snd_sb_alloc(stcb, sz)  \
  304 do { \
  305         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  306         if ((stcb->sctp_socket != NULL) && \
  307             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  308              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  309                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  310         } \
  311 } while (0)
  312 
  313 /* new functions to start/stop udp tunneling */
  314 void sctp_over_udp_stop(void);
  315 int sctp_over_udp_start(void);
  316 
  317 int
  318 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  319     struct uio *uio,
  320     struct mbuf **mp0,
  321     struct mbuf **controlp,
  322     int *flagsp);
  323 
  324 
  325 /* For those not passing mbufs, this does the
  326  * translations for you. Caller owns memory
  327  * of size controllen returned in controlp.
  328  */
  329 int 
  330 sctp_l_soreceive(struct socket *so,
  331     struct sockaddr **name,
  332     struct uio *uio,
  333     char **controlp,
  334     int *controllen,
  335     int *flag);
  336 
  337 
  338 void
  339      sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
  340 
  341 void
  342 sctp_wakeup_log(struct sctp_tcb *stcb,
  343     uint32_t cumtsn,
  344     uint32_t wake_cnt, int from);
  345 
  346 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
  347 
  348 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
  349 
  350 
  351 void
  352      sctp_log_mb(struct mbuf *m, int from);
  353 
  354 void
  355 sctp_sblog(struct sockbuf *sb,
  356     struct sctp_tcb *stcb, int from, int incr);
  357 
  358 void
  359 sctp_log_strm_del(struct sctp_queued_to_read *control,
  360     struct sctp_queued_to_read *poschk,
  361     int from);
  362 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  363 void rto_logging(struct sctp_nets *net, int from);
  364 
  365 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  366 
  367 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  368 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  369 void sctp_log_block(uint8_t, struct socket *, struct sctp_association *, int);
  370 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  371 void sctp_log_mbcnt(uint8_t, uint32_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 
  389 
  390 #endif                          /* _KERNEL */
  391 #endif

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