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("$FreeBSD$");
   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)
   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  * Function prototypes
   67  */
   68 int32_t
   69         sctp_map_assoc_state(int);
   70 
   71 uint32_t
   72          sctp_get_ifa_hash_val(struct sockaddr *addr);
   73 
   74 struct sctp_ifa *sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, int hold_lock);
   75 
   76 struct sctp_ifa *sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock);
   77 
   78 uint32_t sctp_select_initial_TSN(struct sctp_pcb *);
   79 
   80 uint32_t sctp_select_a_tag(struct sctp_inpcb *, uint16_t lport, uint16_t rport, int);
   81 
   82 int sctp_init_asoc(struct sctp_inpcb *, struct sctp_tcb *, uint32_t, uint32_t, uint32_t, uint16_t);
   83 
   84 void sctp_fill_random_store(struct sctp_pcb *);
   85 
   86 void
   87 sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin,
   88     uint16_t numberout, int flag);
   89 void
   90      sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag);
   91 
   92 /*
   93  * NOTE: sctp_timer_start() will increment the reference count of any relevant
   94  * structure the timer is referencing, in order to prevent a race condition
   95  * between the timer executing and the structure being freed.
   96  *
   97  * When the timer fires or sctp_timer_stop() is called, these references are
   98  * removed.
   99  */
  100 void
  101 sctp_timer_start(int, struct sctp_inpcb *, struct sctp_tcb *,
  102     struct sctp_nets *);
  103 
  104 void
  105 sctp_timer_stop(int, struct sctp_inpcb *, struct sctp_tcb *,
  106     struct sctp_nets *, uint32_t);
  107 
  108 int
  109     sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id);
  110 
  111 void
  112 sctp_wakeup_the_read_socket(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
  113     int so_locked
  114     SCTP_UNUSED
  115 );
  116 
  117 void
  118 sctp_add_to_readq(struct sctp_inpcb *inp,
  119     struct sctp_tcb *stcb,
  120     struct sctp_queued_to_read *control,
  121     struct sockbuf *sb,
  122     int end,
  123     int inpread_locked,
  124     int so_locked);
  125 
  126 void sctp_iterator_worker(void);
  127 
  128 uint32_t sctp_get_prev_mtu(uint32_t);
  129 uint32_t sctp_get_next_mtu(uint32_t);
  130 
  131 void
  132      sctp_timeout_handler(void *);
  133 
  134 int
  135 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *,
  136     struct sctp_nets *, struct timeval *, int);
  137 
  138 uint32_t sctp_calculate_len(struct mbuf *);
  139 
  140 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *);
  141 
  142 struct sctp_paramhdr *
  143 sctp_get_next_param(struct mbuf *, int,
  144     struct sctp_paramhdr *, int);
  145 
  146 struct mbuf *sctp_add_pad_tombuf(struct mbuf *, int);
  147 
  148 struct mbuf *sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *);
  149 
  150 void sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int);
  151 
  152 void
  153 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
  154     struct sctp_inpcb *new_inp,
  155     struct sctp_tcb *stcb, int waitflags);
  156 
  157 void sctp_stop_timers_for_shutdown(struct sctp_tcb *);
  158 
  159 /* Stop all timers for association and remote addresses. */
  160 void sctp_stop_association_timers(struct sctp_tcb *, bool);
  161 
  162 void sctp_report_all_outbound(struct sctp_tcb *, uint16_t, int);
  163 
  164 int sctp_expand_mapping_array(struct sctp_association *, uint32_t);
  165 
  166 void
  167 sctp_abort_notification(struct sctp_tcb *, bool, bool, uint16_t,
  168     struct sctp_abort_chunk *, int);
  169 
  170 /* We abort responding to an IP packet for some reason */
  171 void
  172 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *, struct mbuf *,
  173     int, struct sockaddr *, struct sockaddr *,
  174     struct sctphdr *, struct mbuf *,
  175     uint8_t, uint32_t,
  176     uint32_t, uint16_t);
  177 
  178 /* We choose to abort via user input */
  179 void
  180 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *,
  181     struct mbuf *, bool, int);
  182 
  183 void
  184 sctp_handle_ootb(struct mbuf *, int, int,
  185     struct sockaddr *, struct sockaddr *,
  186     struct sctphdr *, struct sctp_inpcb *,
  187     struct mbuf *,
  188     uint8_t, uint32_t, uint16_t,
  189     uint32_t, uint16_t);
  190 
  191 int
  192 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
  193     int totaddr, int *error);
  194 
  195 int
  196 sctp_connectx_helper_find(struct sctp_inpcb *, struct sockaddr *,
  197     unsigned int, unsigned int *, unsigned int *, unsigned int);
  198 
  199 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *);
  200 #ifdef INET6
  201 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  202 
  203 struct sockaddr_in6 *sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *);
  204 
  205 #define sctp_recover_scope_mac(addr, store) do { \
  206          if ((addr->sin6_family == AF_INET6) && \
  207              (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \
  208                 *store = *addr; \
  209                 if (addr->sin6_scope_id == 0) { \
  210                         if (!sa6_recoverscope(store)) { \
  211                                 addr = store; \
  212                         } \
  213                 } else { \
  214                         in6_clearscope(&addr->sin6_addr); \
  215                         addr = store; \
  216                 } \
  217          } \
  218 } while (0)
  219 #endif
  220 
  221 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *);
  222 
  223 void sctp_print_address(struct sockaddr *);
  224 
  225 int
  226 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *,
  227     uint8_t, int);
  228 
  229 struct mbuf *sctp_generate_cause(uint16_t, char *);
  230 struct mbuf *sctp_generate_no_user_data_cause(uint32_t);
  231 
  232 void
  233 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
  234     struct sockaddr *sa, uint32_t vrf_id, int *error,
  235     void *p);
  236 void
  237 sctp_bindx_delete_address(struct sctp_inpcb *inp, struct sockaddr *sa,
  238     uint32_t vrf_id, int *error);
  239 
  240 int sctp_local_addr_count(struct sctp_tcb *stcb);
  241 
  242 void
  243 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *,
  244     struct sctp_tmit_chunk *, int);
  245 
  246 #define sctp_free_spbufspace(stcb, asoc, sp)  \
  247 do { \
  248         if (sp->data != NULL) { \
  249                 if ((asoc)->total_output_queue_size >= sp->length) { \
  250                         atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \
  251                 } else { \
  252                         (asoc)->total_output_queue_size = 0; \
  253                 } \
  254                 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  255                     (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  256                         if (stcb->sctp_socket->so_snd.sb_cc >= sp->length) { \
  257                                 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc,sp->length); \
  258                         } else { \
  259                                 stcb->sctp_socket->so_snd.sb_cc = 0; \
  260                         } \
  261                 } \
  262         } \
  263 } while (0)
  264 
  265 #define sctp_snd_sb_alloc(stcb, sz)  \
  266 do { \
  267         atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \
  268         if ((stcb->sctp_socket != NULL) && \
  269             ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \
  270              (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \
  271                 atomic_add_int(&stcb->sctp_socket->so_snd.sb_cc,sz); \
  272         } \
  273 } while (0)
  274 
  275 /* functions to start/stop udp tunneling */
  276 void sctp_over_udp_stop(void);
  277 int sctp_over_udp_start(void);
  278 
  279 int
  280 sctp_soreceive(struct socket *so, struct sockaddr **psa,
  281     struct uio *uio,
  282     struct mbuf **mp0,
  283     struct mbuf **controlp,
  284     int *flagsp);
  285 
  286 void
  287      sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d);
  288 
  289 void
  290 sctp_wakeup_log(struct sctp_tcb *stcb,
  291     uint32_t wake_cnt, int from);
  292 
  293 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int);
  294 
  295 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action);
  296 
  297 #ifdef SCTP_MBUF_LOGGING
  298 void
  299      sctp_log_mb(struct mbuf *m, int from);
  300 
  301 void
  302      sctp_log_mbc(struct mbuf *m, int from);
  303 #endif
  304 
  305 void
  306 sctp_sblog(struct sockbuf *sb,
  307     struct sctp_tcb *stcb, int from, int incr);
  308 
  309 void
  310 sctp_log_strm_del(struct sctp_queued_to_read *control,
  311     struct sctp_queued_to_read *poschk,
  312     int from);
  313 void sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *, int, uint8_t);
  314 void rto_logging(struct sctp_nets *net, int from);
  315 
  316 void sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc);
  317 
  318 void sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from);
  319 void sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *, int, int, uint8_t);
  320 void sctp_log_block(uint8_t, struct sctp_association *, ssize_t);
  321 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t);
  322 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t);
  323 int sctp_fill_stat_log(void *, size_t *);
  324 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int);
  325 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int);
  326 void sctp_log_map(uint32_t, uint32_t, uint32_t, int);
  327 void sctp_print_mapping_array(struct sctp_association *asoc);
  328 void sctp_clr_stat_log(void);
  329 
  330 #ifdef SCTP_AUDITING_ENABLED
  331 void
  332 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *,
  333     struct sctp_nets *);
  334 void sctp_audit_log(uint8_t, uint8_t);
  335 
  336 #endif
  337 uint32_t sctp_min_mtu(uint32_t, uint32_t, uint32_t);
  338 void sctp_hc_set_mtu(union sctp_sockstore *, uint16_t, uint32_t);
  339 uint32_t sctp_hc_get_mtu(union sctp_sockstore *, uint16_t);
  340 void sctp_set_state(struct sctp_tcb *, int);
  341 void sctp_add_substate(struct sctp_tcb *, int);
  342 uint32_t sctp_ticks_to_msecs(uint32_t);
  343 uint32_t sctp_msecs_to_ticks(uint32_t);
  344 uint32_t sctp_ticks_to_secs(uint32_t);
  345 uint32_t sctp_secs_to_ticks(uint32_t);
  346 
  347 #endif                          /* _KERNEL */
  348 #endif

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