1 /*- 2 * Copyright (c) 2001-2008, 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 /* $KAME: sctp_var.h,v 1.24 2005/03/06 16:04:19 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef _NETINET_SCTP_VAR_H_ 39 #define _NETINET_SCTP_VAR_H_ 40 41 #include <netinet/sctp_uio.h> 42 43 #if defined(_KERNEL) || defined(__Userspace__) 44 45 extern struct pr_usrreqs sctp_usrreqs; 46 47 48 #define sctp_feature_on(inp, feature) (inp->sctp_features |= feature) 49 #define sctp_feature_off(inp, feature) (inp->sctp_features &= ~feature) 50 #define sctp_is_feature_on(inp, feature) ((inp->sctp_features & feature) == feature) 51 #define sctp_is_feature_off(inp, feature) ((inp->sctp_features & feature) == 0) 52 53 #define sctp_stcb_feature_on(inp, stcb, feature) {\ 54 if (stcb) { \ 55 stcb->asoc.sctp_features |= feature; \ 56 } else if (inp) { \ 57 inp->sctp_features |= feature; \ 58 } \ 59 } 60 #define sctp_stcb_feature_off(inp, stcb, feature) {\ 61 if (stcb) { \ 62 stcb->asoc.sctp_features &= ~feature; \ 63 } else if (inp) { \ 64 inp->sctp_features &= ~feature; \ 65 } \ 66 } 67 #define sctp_stcb_is_feature_on(inp, stcb, feature) \ 68 (((stcb != NULL) && \ 69 ((stcb->asoc.sctp_features & feature) == feature)) || \ 70 ((stcb == NULL) && (inp != NULL) && \ 71 ((inp->sctp_features & feature) == feature))) 72 #define sctp_stcb_is_feature_off(inp, stcb, feature) \ 73 (((stcb != NULL) && \ 74 ((stcb->asoc.sctp_features & feature) == 0)) || \ 75 ((stcb == NULL) && (inp != NULL) && \ 76 ((inp->sctp_features & feature) == 0)) || \ 77 ((stcb == NULL) && (inp == NULL))) 78 79 /* managing mobility_feature in inpcb (by micchie) */ 80 #define sctp_mobility_feature_on(inp, feature) (inp->sctp_mobility_features |= feature) 81 #define sctp_mobility_feature_off(inp, feature) (inp->sctp_mobility_features &= ~feature) 82 #define sctp_is_mobility_feature_on(inp, feature) (inp->sctp_mobility_features & feature) 83 #define sctp_is_mobility_feature_off(inp, feature) ((inp->sctp_mobility_features & feature) == 0) 84 85 #define sctp_maxspace(sb) (max((sb)->sb_hiwat,SCTP_MINIMAL_RWND)) 86 87 #define sctp_sbspace(asoc, sb) ((long) ((sctp_maxspace(sb) > (asoc)->sb_cc) ? (sctp_maxspace(sb) - (asoc)->sb_cc) : 0)) 88 89 #define sctp_sbspace_failedmsgs(sb) ((long) ((sctp_maxspace(sb) > (sb)->sb_cc) ? (sctp_maxspace(sb) - (sb)->sb_cc) : 0)) 90 91 #define sctp_sbspace_sub(a,b) ((a > b) ? (a - b) : 0) 92 93 /* 94 * I tried to cache the readq entries at one point. But the reality 95 * is that it did not add any performance since this meant we had to 96 * lock the STCB on read. And at that point once you have to do an 97 * extra lock, it really does not matter if the lock is in the ZONE 98 * stuff or in our code. Note that this same problem would occur with 99 * an mbuf cache as well so it is not really worth doing, at least 100 * right now :-D 101 */ 102 103 #define sctp_free_a_readq(_stcb, _readq) { \ 104 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \ 105 SCTP_DECR_READQ_COUNT(); \ 106 } 107 108 #define sctp_alloc_a_readq(_stcb, _readq) { \ 109 (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \ 110 if ((_readq)) { \ 111 SCTP_INCR_READQ_COUNT(); \ 112 } \ 113 } 114 115 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \ 116 if ((_strmoq)->holds_key_ref) { \ 117 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \ 118 (_strmoq)->holds_key_ref = 0; \ 119 } \ 120 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \ 121 SCTP_DECR_STRMOQ_COUNT(); \ 122 } 123 124 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \ 125 (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \ 126 if ((_strmoq)) { \ 127 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \ 128 SCTP_INCR_STRMOQ_COUNT(); \ 129 (_strmoq)->holds_key_ref = 0; \ 130 } \ 131 } 132 133 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \ 134 if ((_chk)->holds_key_ref) {\ 135 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \ 136 (_chk)->holds_key_ref = 0; \ 137 } \ 138 if (_stcb) { \ 139 SCTP_TCB_LOCK_ASSERT((_stcb)); \ 140 if ((_chk)->whoTo) { \ 141 sctp_free_remote_addr((_chk)->whoTo); \ 142 (_chk)->whoTo = NULL; \ 143 } \ 144 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \ 145 (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \ 146 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 147 SCTP_DECR_CHK_COUNT(); \ 148 } else { \ 149 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 150 (_stcb)->asoc.free_chunk_cnt++; \ 151 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 152 } \ 153 } else { \ 154 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 155 SCTP_DECR_CHK_COUNT(); \ 156 } \ 157 } 158 159 #define sctp_alloc_a_chunk(_stcb, _chk) { \ 160 if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \ 161 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \ 162 if ((_chk)) { \ 163 SCTP_INCR_CHK_COUNT(); \ 164 (_chk)->whoTo = NULL; \ 165 (_chk)->holds_key_ref = 0; \ 166 } \ 167 } else { \ 168 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \ 169 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 170 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 171 (_chk)->holds_key_ref = 0; \ 172 SCTP_STAT_INCR(sctps_cached_chk); \ 173 (_stcb)->asoc.free_chunk_cnt--; \ 174 } \ 175 } 176 177 178 #define sctp_free_remote_addr(__net) { \ 179 if ((__net)) { \ 180 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \ 181 (void)SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \ 182 (void)SCTP_OS_TIMER_STOP(&(__net)->pmtu_timer.timer); \ 183 if ((__net)->ro.ro_rt) { \ 184 RTFREE((__net)->ro.ro_rt); \ 185 (__net)->ro.ro_rt = NULL; \ 186 } \ 187 if ((__net)->src_addr_selected) { \ 188 sctp_free_ifa((__net)->ro._s_addr); \ 189 (__net)->ro._s_addr = NULL; \ 190 } \ 191 (__net)->src_addr_selected = 0; \ 192 (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \ 193 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \ 194 SCTP_DECR_RADDR_COUNT(); \ 195 } \ 196 } \ 197 } 198 199 #define sctp_sbfree(ctl, stcb, sb, m) { \ 200 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \ 201 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \ 202 if (((ctl)->do_not_ref_stcb == 0) && stcb) {\ 203 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \ 204 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \ 205 } \ 206 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \ 207 SCTP_BUF_TYPE(m) != MT_OOBDATA) \ 208 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \ 209 } 210 211 #define sctp_sballoc(stcb, sb, m) { \ 212 atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \ 213 atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \ 214 if (stcb) { \ 215 atomic_add_int(&(stcb)->asoc.sb_cc,SCTP_BUF_LEN((m))); \ 216 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \ 217 } \ 218 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \ 219 SCTP_BUF_TYPE(m) != MT_OOBDATA) \ 220 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \ 221 } 222 223 224 #define sctp_ucount_incr(val) { \ 225 val++; \ 226 } 227 228 #define sctp_ucount_decr(val) { \ 229 if (val > 0) { \ 230 val--; \ 231 } else { \ 232 val = 0; \ 233 } \ 234 } 235 236 #define sctp_mbuf_crush(data) do { \ 237 struct mbuf *_m; \ 238 _m = (data); \ 239 while (_m && (SCTP_BUF_LEN(_m) == 0)) { \ 240 (data) = SCTP_BUF_NEXT(_m); \ 241 SCTP_BUF_NEXT(_m) = NULL; \ 242 sctp_m_free(_m); \ 243 _m = (data); \ 244 } \ 245 } while (0) 246 247 #define sctp_flight_size_decrease(tp1) do { \ 248 if (tp1->whoTo->flight_size >= tp1->book_size) \ 249 tp1->whoTo->flight_size -= tp1->book_size; \ 250 else \ 251 tp1->whoTo->flight_size = 0; \ 252 } while (0) 253 254 #define sctp_flight_size_increase(tp1) do { \ 255 (tp1)->whoTo->flight_size += (tp1)->book_size; \ 256 } while (0) 257 258 #ifdef SCTP_FS_SPEC_LOG 259 #define sctp_total_flight_decrease(stcb, tp1) do { \ 260 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \ 261 stcb->asoc.fs_index = 0;\ 262 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \ 263 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \ 264 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \ 265 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \ 266 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \ 267 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \ 268 stcb->asoc.fs_index++; \ 269 tp1->window_probe = 0; \ 270 if (stcb->asoc.total_flight >= tp1->book_size) { \ 271 stcb->asoc.total_flight -= tp1->book_size; \ 272 if (stcb->asoc.total_flight_count > 0) \ 273 stcb->asoc.total_flight_count--; \ 274 } else { \ 275 stcb->asoc.total_flight = 0; \ 276 stcb->asoc.total_flight_count = 0; \ 277 } \ 278 } while (0) 279 280 #define sctp_total_flight_increase(stcb, tp1) do { \ 281 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \ 282 stcb->asoc.fs_index = 0;\ 283 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \ 284 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \ 285 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \ 286 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \ 287 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \ 288 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \ 289 stcb->asoc.fs_index++; \ 290 (stcb)->asoc.total_flight_count++; \ 291 (stcb)->asoc.total_flight += (tp1)->book_size; \ 292 } while (0) 293 294 #else 295 296 #define sctp_total_flight_decrease(stcb, tp1) do { \ 297 tp1->window_probe = 0; \ 298 if (stcb->asoc.total_flight >= tp1->book_size) { \ 299 stcb->asoc.total_flight -= tp1->book_size; \ 300 if (stcb->asoc.total_flight_count > 0) \ 301 stcb->asoc.total_flight_count--; \ 302 } else { \ 303 stcb->asoc.total_flight = 0; \ 304 stcb->asoc.total_flight_count = 0; \ 305 } \ 306 } while (0) 307 308 #define sctp_total_flight_increase(stcb, tp1) do { \ 309 (stcb)->asoc.total_flight_count++; \ 310 (stcb)->asoc.total_flight += (tp1)->book_size; \ 311 } while (0) 312 313 #endif 314 315 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold) 316 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count) 317 318 struct sctp_nets; 319 struct sctp_inpcb; 320 struct sctp_tcb; 321 struct sctphdr; 322 323 324 void sctp_close(struct socket *so); 325 int sctp_disconnect(struct socket *so); 326 327 void sctp_ctlinput __P((int, struct sockaddr *, void *)); 328 int sctp_ctloutput __P((struct socket *, struct sockopt *)); 329 330 #ifdef INET 331 void sctp_input_with_port __P((struct mbuf *, int, uint16_t)); 332 333 #endif 334 #ifdef INET 335 void sctp_input __P((struct mbuf *, int)); 336 337 #endif 338 void sctp_pathmtu_adjustment __P((struct sctp_tcb *, uint16_t)); 339 void sctp_drain __P((void)); 340 void sctp_init __P((void)); 341 342 void sctp_finish(void); 343 344 int sctp_flush(struct socket *, int); 345 int sctp_shutdown __P((struct socket *)); 346 void sctp_notify 347 __P((struct sctp_inpcb *, struct ip *ip, struct sctphdr *, 348 struct sockaddr *, struct sctp_tcb *, 349 struct sctp_nets *)); 350 351 int sctp_bindx(struct socket *, int, struct sockaddr_storage *, 352 int, int, struct proc *); 353 354 /* can't use sctp_assoc_t here */ 355 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *); 356 357 int sctp_ingetaddr(struct socket *, 358 struct sockaddr ** 359 ); 360 361 int sctp_peeraddr(struct socket *, 362 struct sockaddr ** 363 ); 364 365 int sctp_listen(struct socket *, int, struct thread *); 366 367 int sctp_accept(struct socket *, struct sockaddr **); 368 369 #endif /* _KERNEL */ 370 371 #endif /* !_NETINET_SCTP_VAR_H_ */ 372