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 uint32_t 71 sctp_get_ifa_hash_val(struct sockaddr *addr); 72 73 struct sctp_ifa * 74 sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr, int hold_lock); 75 76 struct sctp_ifa * 77 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); 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_add_to_readq(struct sctp_inpcb *inp, 109 struct sctp_tcb *stcb, 110 struct sctp_queued_to_read *control, 111 struct sockbuf *sb, 112 int end, 113 int inpread_locked, 114 int so_locked 115 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 116 SCTP_UNUSED 117 #endif 118 ); 119 120 int 121 sctp_append_to_readq(struct sctp_inpcb *inp, 122 struct sctp_tcb *stcb, 123 struct sctp_queued_to_read *control, 124 struct mbuf *m, 125 int end, 126 int new_cumack, 127 struct sockbuf *sb); 128 129 130 void sctp_iterator_worker(void); 131 132 uint32_t sctp_get_prev_mtu(uint32_t); 133 uint32_t sctp_get_next_mtu(uint32_t); 134 135 void 136 sctp_timeout_handler(void *); 137 138 uint32_t 139 sctp_calculate_rto(struct sctp_tcb *, struct sctp_association *, 140 struct sctp_nets *, struct timeval *, int, int); 141 142 uint32_t sctp_calculate_len(struct mbuf *); 143 144 caddr_t sctp_m_getptr(struct mbuf *, int, int, uint8_t *); 145 146 struct sctp_paramhdr * 147 sctp_get_next_param(struct mbuf *, int, 148 struct sctp_paramhdr *, int); 149 150 struct mbuf * 151 sctp_add_pad_tombuf(struct mbuf *, int); 152 153 struct mbuf * 154 sctp_pad_lastmbuf(struct mbuf *, int, struct mbuf *); 155 156 void 157 sctp_ulp_notify(uint32_t, struct sctp_tcb *, uint32_t, void *, int 158 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 159 SCTP_UNUSED 160 #endif 161 ); 162 163 void 164 sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp, 165 struct sctp_inpcb *new_inp, 166 struct sctp_tcb *stcb, int waitflags); 167 168 169 void sctp_stop_timers_for_shutdown(struct sctp_tcb *); 170 171 void 172 sctp_report_all_outbound(struct sctp_tcb *, uint16_t, int, int 173 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 174 SCTP_UNUSED 175 #endif 176 ); 177 178 int sctp_expand_mapping_array(struct sctp_association *, uint32_t); 179 180 void 181 sctp_abort_notification(struct sctp_tcb *, uint8_t, uint16_t, 182 struct sctp_abort_chunk *, int 183 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 184 SCTP_UNUSED 185 #endif 186 ); 187 188 /* We abort responding to an IP packet for some reason */ 189 void 190 sctp_abort_association(struct sctp_inpcb *, struct sctp_tcb *, struct mbuf *, 191 int, struct sockaddr *, struct sockaddr *, 192 struct sctphdr *, struct mbuf *, 193 uint8_t, uint32_t, 194 uint32_t, uint16_t); 195 196 197 /* We choose to abort via user input */ 198 void 199 sctp_abort_an_association(struct sctp_inpcb *, struct sctp_tcb *, 200 struct mbuf *, int 201 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 202 SCTP_UNUSED 203 #endif 204 ); 205 206 void 207 sctp_handle_ootb(struct mbuf *, int, int, 208 struct sockaddr *, struct sockaddr *, 209 struct sctphdr *, struct sctp_inpcb *, 210 struct mbuf *, 211 uint8_t, uint32_t, 212 uint32_t, uint16_t); 213 214 int 215 sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr, 216 int totaddr, int *error); 217 218 struct sctp_tcb * 219 sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr, 220 int *totaddr, int *num_v4, int *num_v6, int *error, int limit, int *bad_addr); 221 222 int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *); 223 224 #ifdef INET6 225 uint32_t sctp_is_same_scope(struct sockaddr_in6 *, struct sockaddr_in6 *); 226 227 struct sockaddr_in6 * 228 sctp_recover_scope(struct sockaddr_in6 *, struct sockaddr_in6 *); 229 230 #define sctp_recover_scope_mac(addr, store) do { \ 231 if ((addr->sin6_family == AF_INET6) && \ 232 (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr))) { \ 233 *store = *addr; \ 234 if (addr->sin6_scope_id == 0) { \ 235 if (!sa6_recoverscope(store)) { \ 236 addr = store; \ 237 } \ 238 } else { \ 239 in6_clearscope(&addr->sin6_addr); \ 240 addr = store; \ 241 } \ 242 } \ 243 } while (0) 244 #endif 245 246 int sctp_cmpaddr(struct sockaddr *, struct sockaddr *); 247 248 void sctp_print_address(struct sockaddr *); 249 250 int 251 sctp_release_pr_sctp_chunk(struct sctp_tcb *, struct sctp_tmit_chunk *, 252 uint8_t, int 253 #if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 254 SCTP_UNUSED 255 #endif 256 ); 257 258 struct mbuf *sctp_generate_cause(uint16_t, char *); 259 struct mbuf *sctp_generate_no_user_data_cause(uint32_t); 260 261 void 262 sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp, 263 struct sockaddr *sa, sctp_assoc_t assoc_id, 264 uint32_t vrf_id, int *error, void *p); 265 void 266 sctp_bindx_delete_address(struct sctp_inpcb *inp, 267 struct sockaddr *sa, sctp_assoc_t assoc_id, 268 uint32_t vrf_id, int *error); 269 270 int sctp_local_addr_count(struct sctp_tcb *stcb); 271 272 #ifdef SCTP_MBCNT_LOGGING 273 void 274 sctp_free_bufspace(struct sctp_tcb *, struct sctp_association *, 275 struct sctp_tmit_chunk *, int); 276 277 #else 278 #define sctp_free_bufspace(stcb, asoc, tp1, chk_cnt) \ 279 do { \ 280 if (tp1->data != NULL) { \ 281 atomic_subtract_int(&((asoc)->chunks_on_out_queue), chk_cnt); \ 282 if ((asoc)->total_output_queue_size >= tp1->book_size) { \ 283 atomic_subtract_int(&((asoc)->total_output_queue_size), tp1->book_size); \ 284 } else { \ 285 (asoc)->total_output_queue_size = 0; \ 286 } \ 287 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \ 288 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \ 289 if (stcb->sctp_socket->so_snd.sb_ccc >= tp1->book_size) { \ 290 atomic_subtract_int(&((stcb)->sctp_socket->so_snd.sb_ccc), tp1->book_size); \ 291 } else { \ 292 stcb->sctp_socket->so_snd.sb_ccc = 0; \ 293 } \ 294 } \ 295 } \ 296 } while (0) 297 298 #endif 299 300 #define sctp_free_spbufspace(stcb, asoc, sp) \ 301 do { \ 302 if (sp->data != NULL) { \ 303 if ((asoc)->total_output_queue_size >= sp->length) { \ 304 atomic_subtract_int(&(asoc)->total_output_queue_size, sp->length); \ 305 } else { \ 306 (asoc)->total_output_queue_size = 0; \ 307 } \ 308 if (stcb->sctp_socket && ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \ 309 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \ 310 if (stcb->sctp_socket->so_snd.sb_ccc >= sp->length) { \ 311 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_ccc,sp->length); \ 312 } else { \ 313 stcb->sctp_socket->so_snd.sb_ccc = 0; \ 314 } \ 315 } \ 316 } \ 317 } while (0) 318 319 #define sctp_snd_sb_alloc(stcb, sz) \ 320 do { \ 321 atomic_add_int(&stcb->asoc.total_output_queue_size,sz); \ 322 if ((stcb->sctp_socket != NULL) && \ 323 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || \ 324 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { \ 325 atomic_add_int(&stcb->sctp_socket->so_snd.sb_ccc,sz); \ 326 } \ 327 } while (0) 328 329 /* functions to start/stop udp tunneling */ 330 void sctp_over_udp_stop(void); 331 int sctp_over_udp_start(void); 332 333 int 334 sctp_soreceive(struct socket *so, struct sockaddr **psa, 335 struct uio *uio, 336 struct mbuf **mp0, 337 struct mbuf **controlp, 338 int *flagsp); 339 340 void 341 sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d); 342 343 void 344 sctp_wakeup_log(struct sctp_tcb *stcb, 345 uint32_t wake_cnt, int from); 346 347 void sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t, uint16_t, uint16_t, int); 348 349 void sctp_log_nagle_event(struct sctp_tcb *stcb, int action); 350 351 352 void 353 sctp_log_mb(struct mbuf *m, int from); 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 *, int); 371 void sctp_log_rwnd(uint8_t, uint32_t, uint32_t, uint32_t); 372 void sctp_log_mbcnt(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t); 373 void sctp_log_rwnd_set(uint8_t, uint32_t, uint32_t, uint32_t, uint32_t); 374 int sctp_fill_stat_log(void *, size_t *); 375 void sctp_log_fr(uint32_t, uint32_t, uint32_t, int); 376 void sctp_log_sack(uint32_t, uint32_t, uint32_t, uint16_t, uint16_t, int); 377 void sctp_log_map(uint32_t, uint32_t, uint32_t, int); 378 void sctp_print_mapping_array(struct sctp_association *asoc); 379 void sctp_clr_stat_log(void); 380 381 382 #ifdef SCTP_AUDITING_ENABLED 383 void 384 sctp_auditing(int, struct sctp_inpcb *, struct sctp_tcb *, 385 struct sctp_nets *); 386 void sctp_audit_log(uint8_t, uint8_t); 387 388 #endif 389 #endif /* _KERNEL */ 390 #endif 391