1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, 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 #ifndef _NETINET_SCTP_VAR_H_ 36 #define _NETINET_SCTP_VAR_H_ 37 38 #include <netinet/sctp_uio.h> 39 40 #if defined(_KERNEL) || defined(__Userspace__) 41 42 extern struct protosw sctp_seqpacket_protosw, sctp_stream_protosw; 43 44 #define sctp_feature_on(inp, feature) (inp->sctp_features |= feature) 45 #define sctp_feature_off(inp, feature) (inp->sctp_features &= ~feature) 46 #define sctp_is_feature_on(inp, feature) ((inp->sctp_features & feature) == feature) 47 #define sctp_is_feature_off(inp, feature) ((inp->sctp_features & feature) == 0) 48 49 #define sctp_stcb_feature_on(inp, stcb, feature) {\ 50 if (stcb) { \ 51 stcb->asoc.sctp_features |= feature; \ 52 } else if (inp) { \ 53 inp->sctp_features |= feature; \ 54 } \ 55 } 56 #define sctp_stcb_feature_off(inp, stcb, feature) {\ 57 if (stcb) { \ 58 stcb->asoc.sctp_features &= ~feature; \ 59 } else if (inp) { \ 60 inp->sctp_features &= ~feature; \ 61 } \ 62 } 63 #define sctp_stcb_is_feature_on(inp, stcb, feature) \ 64 (((stcb != NULL) && \ 65 ((stcb->asoc.sctp_features & feature) == feature)) || \ 66 ((stcb == NULL) && (inp != NULL) && \ 67 ((inp->sctp_features & feature) == feature))) 68 #define sctp_stcb_is_feature_off(inp, stcb, feature) \ 69 (((stcb != NULL) && \ 70 ((stcb->asoc.sctp_features & feature) == 0)) || \ 71 ((stcb == NULL) && (inp != NULL) && \ 72 ((inp->sctp_features & feature) == 0)) || \ 73 ((stcb == NULL) && (inp == NULL))) 74 75 /* managing mobility_feature in inpcb (by micchie) */ 76 #define sctp_mobility_feature_on(inp, feature) (inp->sctp_mobility_features |= feature) 77 #define sctp_mobility_feature_off(inp, feature) (inp->sctp_mobility_features &= ~feature) 78 #define sctp_is_mobility_feature_on(inp, feature) (inp->sctp_mobility_features & feature) 79 #define sctp_is_mobility_feature_off(inp, feature) ((inp->sctp_mobility_features & feature) == 0) 80 81 #define sctp_maxspace(sb) (max((sb)->sb_hiwat,SCTP_MINIMAL_RWND)) 82 83 #define sctp_sbspace(asoc, sb) ((long) ((sctp_maxspace(sb) > (asoc)->sb_cc) ? (sctp_maxspace(sb) - (asoc)->sb_cc) : 0)) 84 85 #define sctp_sbspace_failedmsgs(sb) ((long) ((sctp_maxspace(sb) > SCTP_SBAVAIL(sb)) ? (sctp_maxspace(sb) - SCTP_SBAVAIL(sb)) : 0)) 86 87 #define sctp_sbspace_sub(a,b) (((a) > (b)) ? ((a) - (b)) : 0) 88 89 /* 90 * I tried to cache the readq entries at one point. But the reality 91 * is that it did not add any performance since this meant we had to 92 * lock the STCB on read. And at that point once you have to do an 93 * extra lock, it really does not matter if the lock is in the ZONE 94 * stuff or in our code. Note that this same problem would occur with 95 * an mbuf cache as well so it is not really worth doing, at least 96 * right now :-D 97 */ 98 #ifdef INVARIANTS 99 #define sctp_free_a_readq(_stcb, _readq) { \ 100 if ((_readq)->on_strm_q) \ 101 panic("On strm q stcb:%p readq:%p", (_stcb), (_readq)); \ 102 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \ 103 SCTP_DECR_READQ_COUNT(); \ 104 } 105 #else 106 #define sctp_free_a_readq(_stcb, _readq) { \ 107 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \ 108 SCTP_DECR_READQ_COUNT(); \ 109 } 110 #endif 111 112 #define sctp_alloc_a_readq(_stcb, _readq) { \ 113 (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \ 114 if ((_readq)) { \ 115 SCTP_INCR_READQ_COUNT(); \ 116 } \ 117 } 118 119 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \ 120 if ((_strmoq)->holds_key_ref) { \ 121 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \ 122 (_strmoq)->holds_key_ref = 0; \ 123 } \ 124 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \ 125 SCTP_DECR_STRMOQ_COUNT(); \ 126 } 127 128 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \ 129 (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \ 130 if ((_strmoq)) { \ 131 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \ 132 SCTP_INCR_STRMOQ_COUNT(); \ 133 (_strmoq)->holds_key_ref = 0; \ 134 } \ 135 } 136 137 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \ 138 if ((_chk)->holds_key_ref) {\ 139 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \ 140 (_chk)->holds_key_ref = 0; \ 141 } \ 142 if (_stcb) { \ 143 SCTP_TCB_LOCK_ASSERT((_stcb)); \ 144 if ((_chk)->whoTo) { \ 145 sctp_free_remote_addr((_chk)->whoTo); \ 146 (_chk)->whoTo = NULL; \ 147 } \ 148 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \ 149 (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \ 150 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 151 SCTP_DECR_CHK_COUNT(); \ 152 } else { \ 153 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 154 (_stcb)->asoc.free_chunk_cnt++; \ 155 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 156 } \ 157 } else { \ 158 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 159 SCTP_DECR_CHK_COUNT(); \ 160 } \ 161 } 162 163 #define sctp_alloc_a_chunk(_stcb, _chk) { \ 164 if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \ 165 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \ 166 if ((_chk)) { \ 167 SCTP_INCR_CHK_COUNT(); \ 168 (_chk)->whoTo = NULL; \ 169 (_chk)->holds_key_ref = 0; \ 170 } \ 171 } else { \ 172 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \ 173 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 174 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 175 (_chk)->holds_key_ref = 0; \ 176 SCTP_STAT_INCR(sctps_cached_chk); \ 177 (_stcb)->asoc.free_chunk_cnt--; \ 178 } \ 179 } 180 181 #define sctp_free_remote_addr(__net) { \ 182 if ((__net)) { \ 183 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \ 184 RO_NHFREE(&(__net)->ro); \ 185 if ((__net)->src_addr_selected) { \ 186 sctp_free_ifa((__net)->ro._s_addr); \ 187 (__net)->ro._s_addr = NULL; \ 188 } \ 189 (__net)->src_addr_selected = 0; \ 190 (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \ 191 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \ 192 SCTP_DECR_RADDR_COUNT(); \ 193 } \ 194 } \ 195 } 196 197 #define sctp_sbfree(ctl, stcb, sb, m) { \ 198 SCTP_SB_DECR(sb, SCTP_BUF_LEN((m))); \ 199 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \ 200 if (((ctl)->do_not_ref_stcb == 0) && stcb) {\ 201 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \ 202 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \ 203 } \ 204 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \ 205 SCTP_BUF_TYPE(m) != MT_OOBDATA) \ 206 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \ 207 } 208 209 #define sctp_sballoc(stcb, sb, m) { \ 210 SCTP_SB_INCR(sb, SCTP_BUF_LEN((m))); \ 211 atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \ 212 if (stcb) { \ 213 atomic_add_int(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \ 214 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \ 215 } \ 216 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \ 217 SCTP_BUF_TYPE(m) != MT_OOBDATA) \ 218 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \ 219 } 220 221 #define sctp_ucount_incr(val) { \ 222 val++; \ 223 } 224 225 #define sctp_ucount_decr(val) { \ 226 if (val > 0) { \ 227 val--; \ 228 } else { \ 229 val = 0; \ 230 } \ 231 } 232 233 #define sctp_mbuf_crush(data) do { \ 234 struct mbuf *_m; \ 235 _m = (data); \ 236 while (_m && (SCTP_BUF_LEN(_m) == 0)) { \ 237 (data) = SCTP_BUF_NEXT(_m); \ 238 SCTP_BUF_NEXT(_m) = NULL; \ 239 sctp_m_free(_m); \ 240 _m = (data); \ 241 } \ 242 } while (0) 243 244 #define sctp_flight_size_decrease(tp1) do { \ 245 if (tp1->whoTo->flight_size >= tp1->book_size) \ 246 tp1->whoTo->flight_size -= tp1->book_size; \ 247 else \ 248 tp1->whoTo->flight_size = 0; \ 249 } while (0) 250 251 #define sctp_flight_size_increase(tp1) do { \ 252 (tp1)->whoTo->flight_size += (tp1)->book_size; \ 253 } while (0) 254 255 #ifdef SCTP_FS_SPEC_LOG 256 #define sctp_total_flight_decrease(stcb, tp1) do { \ 257 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \ 258 stcb->asoc.fs_index = 0;\ 259 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \ 260 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \ 261 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \ 262 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \ 263 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \ 264 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \ 265 stcb->asoc.fs_index++; \ 266 tp1->window_probe = 0; \ 267 if (stcb->asoc.total_flight >= tp1->book_size) { \ 268 stcb->asoc.total_flight -= tp1->book_size; \ 269 if (stcb->asoc.total_flight_count > 0) \ 270 stcb->asoc.total_flight_count--; \ 271 } else { \ 272 stcb->asoc.total_flight = 0; \ 273 stcb->asoc.total_flight_count = 0; \ 274 } \ 275 } while (0) 276 277 #define sctp_total_flight_increase(stcb, tp1) do { \ 278 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \ 279 stcb->asoc.fs_index = 0;\ 280 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \ 281 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \ 282 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \ 283 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \ 284 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \ 285 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \ 286 stcb->asoc.fs_index++; \ 287 (stcb)->asoc.total_flight_count++; \ 288 (stcb)->asoc.total_flight += (tp1)->book_size; \ 289 } while (0) 290 291 #else 292 293 #define sctp_total_flight_decrease(stcb, tp1) do { \ 294 tp1->window_probe = 0; \ 295 if (stcb->asoc.total_flight >= tp1->book_size) { \ 296 stcb->asoc.total_flight -= tp1->book_size; \ 297 if (stcb->asoc.total_flight_count > 0) \ 298 stcb->asoc.total_flight_count--; \ 299 } else { \ 300 stcb->asoc.total_flight = 0; \ 301 stcb->asoc.total_flight_count = 0; \ 302 } \ 303 } while (0) 304 305 #define sctp_total_flight_increase(stcb, tp1) do { \ 306 (stcb)->asoc.total_flight_count++; \ 307 (stcb)->asoc.total_flight += (tp1)->book_size; \ 308 } while (0) 309 310 #endif 311 312 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold) 313 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count) 314 315 struct sctp_nets; 316 struct sctp_inpcb; 317 struct sctp_tcb; 318 struct sctphdr; 319 320 void sctp_close(struct socket *so); 321 void sctp_abort(struct socket *so); 322 int sctp_disconnect(struct socket *so); 323 ipproto_ctlinput_t sctp_ctlinput; 324 int sctp_ctloutput(struct socket *, struct sockopt *); 325 #ifdef INET 326 void sctp_input_with_port(struct mbuf *, int, uint16_t); 327 int sctp_input(struct mbuf **, int *, int); 328 #endif 329 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint32_t, bool); 330 void 331 sctp_notify(struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *, 332 uint8_t, uint8_t, uint16_t, uint32_t); 333 int sctp_flush(struct socket *, int); 334 int sctp_shutdown(struct socket *, enum shutdown_how); 335 int 336 sctp_bindx(struct socket *, int, struct sockaddr_storage *, 337 int, int, struct proc *); 338 339 /* can't use sctp_assoc_t here */ 340 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *); 341 int sctp_ingetaddr(struct socket *, struct sockaddr *); 342 int sctp_peeraddr(struct socket *, struct sockaddr *); 343 int sctp_listen(struct socket *, int, struct thread *); 344 int sctp_accept(struct socket *, struct sockaddr *); 345 346 #endif /* _KERNEL */ 347 348 #endif /* !_NETINET_SCTP_VAR_H_ */ 349