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) 2008-2011, by Randall Stewart. All rights reserved.
    4  * Copyright (c) 2008-2011, 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 
   34 /* $KAME: sctputil.h,v 1.15 2005/03/06 16:04:19 itojun Exp $     */
   35 
   36 #include <sys/cdefs.h>
   37 __FBSDID("$FreeBSD: releng/9.0/sys/netinet/sctputil.h 222459 2011-05-29 18:41:06Z tuexen $");
   38 #ifndef __sctputil_h__
   39 #define __sctputil_h__
   40 
   41 
   42 #if defined(_KERNEL) || defined(__Userspace__)
   43 
   44 #define SCTP_READ_LOCK_HELD 1
   45 #define SCTP_READ_LOCK_NOT_HELD 0
   46 
   47 #ifdef SCTP_ASOCLOG_OF_TSNS
   48 void sctp_print_out_track_log(struct sctp_tcb *stcb);
   49 
   50 #endif
   51 
   52 #ifdef SCTP_MBUF_LOGGING
   53 struct mbuf *sctp_m_free(struct mbuf *m);
   54 void sctp_m_freem(struct mbuf *m);
   55 
   56 #else
   57 #define sctp_m_free m_free
   58 #define sctp_m_freem m_freem
   59 #endif
   60 
   61 #if defined(SCTP_LOCAL_TRACE_BUF) || defined(__APPLE__)
   62 void
   63      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);
   64 
   65 #endif
   66 
   67 #define sctp_get_associd(stcb) ((sctp_assoc_t)stcb->asoc.assoc_id)
   68 
   69 
   70 /*
   71  * Function prototypes
   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);
   87 
   88 void sctp_fill_random_store(struct sctp_pcb *);
   89 
   90 void
   91 sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,
   92     struct sctp_nets *);
   93 
   94 void
   95 sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,
   96     struct sctp_nets *, uint32_t);
   97 
   98 int
   99     sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id);
  100 
  101 void
  102      sctp_mtu_size_reset(struct sctp_inpcb *, struct sctp_association *, uint32_t);
  103 
  104 void
  105 sctp_add_to_readq(struct sctp_inpcb *inp,
  106     struct sctp_tcb *stcb,
  107     struct sctp_queued_to_read *control,
  108     struct sockbuf *sb,
  109     int end,
  110     int inpread_locked,
  111     int so_locked
  112 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  113     SCTP_UNUSED
  114 #endif
  115 );
  116 
  117 int
  118 sctp_append_to_readq(struct sctp_inpcb *inp,
  119     struct sctp_tcb *stcb,
  120     struct sctp_queued_to_read *control,
  121     struct mbuf *m,
  122     int end,
  123     int new_cumack,
  124     struct sockbuf *sb);
  125 
  126 
  127 void sctp_iterator_worker(void);
  128 
  129 uint32_t sctp_get_prev_mtu(uint32_t);
  130 uint32_t sctp_get_next_mtu(struct sctp_inpcb *, uint32_t);
  131 
  132 void
  133      sctp_timeout_handler(void *);
  134 
  135 uint32_t
  136 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
  137     struct sctp_nets *, struct timeval *, int, int);
  138 
  139 uint32_t sctp_calculate_len(struct mbuf *);
  140 
  141 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
  142 
  143 struct sctp_paramhdr *
  144 sctp_get_next_param(struct mbuf *, int,
  145     struct sctp_paramhdr *, int);
  146 
  147 int sctp_add_pad_tombuf(struct mbuf *, int);
  148 
  149 int sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
  150 
  151 void 
  152 sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int
  153 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  154     SCTP_UNUSED
  155 #endif
  156 );
  157 
  158 void
  159 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
  160     struct sctp_inpcb *new_inp,
  161     struct sctp_tcb *stcb, int waitflags);
  162 
  163 
  164 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
  165 
  166 void 
  167 sctp_report_all_outbound(struct sctp_tcb *, int, int
  168 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  169     SCTP_UNUSED
  170 #endif
  171 );
  172 
  173 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);
  174 
  175 void 
  176 sctp_abort_notification(struct sctp_tcb *, int, int
  177 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  178     SCTP_UNUSED
  179 #endif
  180 );
  181 
  182 /* We abort responding to an IP packet for some reason */
  183 void
  184 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *,
  185     struct mbuf *, int, struct sctphdr *, struct mbuf *, uint32_t, uint16_t);
  186 
  187 
  188 /* We choose to abort via user input */
  189 void
  190 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *, int,
  191     struct mbuf *, int
  192 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
  193     SCTP_UNUSED
  194 #endif
  195 );
  196 
  197 void 
  198 sctp_handle_ootb(struct mbuf *, int, int, struct sctphdr *,
  199     struct sctp_inpcb *, struct mbuf *, uint32_t, uint16_t);
  200 
  201 int 
  202 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
  203     int totaddr, int *error);
  204 
  205 struct sctp_tcb *
  206 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
  207     int *totaddr, int *num_v4, int *num_v6, int *error, int limit, int *bad_addr);
  208 
  209 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
  210 
  211 #ifdef INET6
  212 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  213 
  214 struct sockaddr_in6 *
  215              sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  216 
  217 #define sctp_recover_scope_mac(addr, store) do { \
  218          if ((addr->sin6_family == AF_INET6) && \
  219              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  220                 *store = *addr; \
  221                 if (addr->sin6_scope_id == 0) { \
  222                         if (!sa6_recoverscope(store)) { \
  223                                 addr = store; \
  224                         } \
  225                 } else { \
  226                         in6_clearscope(&addr->sin6_addr); \
  227                         addr = store; \
  228                 } \
  229          } \
  230 } while (0)
  231 #endif
  232 
  233 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  234 
  235 void sctp_print_address(struct sockaddr *);
  236 void sctp_print_address_pkt(struct ip *, struct sctphdr *);
  237 
  238 int
  239 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  240     int, 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                 if ((asoc)->total_output_queue_size >= sp->length) { \
  291                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  292                 } else { \
  293                         (asoc)->total_output_queue_size = 0; \
  294                 } \
  295                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  296                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  297                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  298                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  299                         } else { \
  300                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  301                         } \
  302                 } \
  303         } \
  304 } while (0)
  305 
  306 #define sctp_snd_sb_alloc(stcb, sz)  \
  307 do { \
  308         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  309         if ((stcb->sctp_socket != NULL) && \
  310             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  311              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  312                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  313         } \
  314 } while (0)
  315 
  316 /* functions to start/stop udp tunneling */
  317 /* XXX: Remove the #ifdef after tunneling over IPv6 works also on FreeBSD. */
  318 #ifdef INET
  319 void sctp_over_udp_stop(void);
  320 int sctp_over_udp_start(void);
  321 
  322 #endif
  323 
  324 int
  325 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  326     struct uio *uio,
  327     struct mbuf **mp0,
  328     struct mbuf **controlp,
  329     int *flagsp);
  330 
  331 void
  332      sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
  333 
  334 void
  335 sctp_wakeup_log(struct sctp_tcb *stcb,
  336     uint32_t cumtsn,
  337     uint32_t wake_cnt, int from);
  338 
  339 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
  340 
  341 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
  342 
  343 
  344 void
  345      sctp_log_mb(struct mbuf *m, int from);
  346 
  347 void
  348 sctp_sblog(struct sockbuf *sb,
  349     struct sctp_tcb *stcb, int from, int incr);
  350 
  351 void
  352 sctp_log_strm_del(struct sctp_queued_to_read *control,
  353     struct sctp_queued_to_read *poschk,
  354     int from);
  355 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  356 void rto_logging(struct sctp_nets *net, int from);
  357 
  358 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  359 
  360 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  361 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  362 void sctp_log_block(uint8_t, struct socket *, struct sctp_association *, int);
  363 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  364 void sctp_log_mbcnt(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  365 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  366 int sctp_fill_stat_log(void *, size_t *);
  367 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
  368 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
  369 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
  370 void sctp_print_mapping_array(struct sctp_association *asoc);
  371 void sctp_clr_stat_log(void);
  372 
  373 
  374 #ifdef SCTP_AUDITING_ENABLED
  375 void
  376 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
  377     struct sctp_nets *);
  378 void sctp_audit_log(uint8_t, uint8_t);
  379 
  380 #endif
  381 
  382 
  383 #endif                          /* _KERNEL */
  384 #endif

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