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