1 /*- 2 * Copyright (c) 2001-2008, 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_VAR_H_ 37 #define _NETINET_SCTP_VAR_H_ 38 39 #include <netinet/sctp_uio.h> 40 41 #if defined(_KERNEL) || defined(__Userspace__) 42 43 extern struct pr_usrreqs sctp_usrreqs; 44 45 46 #define sctp_feature_on(inp, feature) (inp->sctp_features |= feature) 47 #define sctp_feature_off(inp, feature) (inp->sctp_features &= ~feature) 48 #define sctp_is_feature_on(inp, feature) ((inp->sctp_features & feature) == feature) 49 #define sctp_is_feature_off(inp, feature) ((inp->sctp_features & feature) == 0) 50 51 #define sctp_stcb_feature_on(inp, stcb, feature) {\ 52 if (stcb) { \ 53 stcb->asoc.sctp_features |= feature; \ 54 } else if (inp) { \ 55 inp->sctp_features |= feature; \ 56 } \ 57 } 58 #define sctp_stcb_feature_off(inp, stcb, feature) {\ 59 if (stcb) { \ 60 stcb->asoc.sctp_features &= ~feature; \ 61 } else if (inp) { \ 62 inp->sctp_features &= ~feature; \ 63 } \ 64 } 65 #define sctp_stcb_is_feature_on(inp, stcb, feature) \ 66 (((stcb != NULL) && \ 67 ((stcb->asoc.sctp_features & feature) == feature)) || \ 68 ((stcb == NULL) && (inp != NULL) && \ 69 ((inp->sctp_features & feature) == feature))) 70 #define sctp_stcb_is_feature_off(inp, stcb, feature) \ 71 (((stcb != NULL) && \ 72 ((stcb->asoc.sctp_features & feature) == 0)) || \ 73 ((stcb == NULL) && (inp != NULL) && \ 74 ((inp->sctp_features & feature) == 0)) || \ 75 ((stcb == NULL) && (inp == NULL))) 76 77 /* managing mobility_feature in inpcb (by micchie) */ 78 #define sctp_mobility_feature_on(inp, feature) (inp->sctp_mobility_features |= feature) 79 #define sctp_mobility_feature_off(inp, feature) (inp->sctp_mobility_features &= ~feature) 80 #define sctp_is_mobility_feature_on(inp, feature) (inp->sctp_mobility_features & feature) 81 #define sctp_is_mobility_feature_off(inp, feature) ((inp->sctp_mobility_features & feature) == 0) 82 83 #define sctp_maxspace(sb) (max((sb)->sb_hiwat,SCTP_MINIMAL_RWND)) 84 85 #define sctp_sbspace(asoc, sb) ((long) ((sctp_maxspace(sb) > (asoc)->sb_cc) ? (sctp_maxspace(sb) - (asoc)->sb_cc) : 0)) 86 87 #define sctp_sbspace_failedmsgs(sb) ((long) ((sctp_maxspace(sb) > (sb)->sb_cc) ? (sctp_maxspace(sb) - (sb)->sb_cc) : 0)) 88 89 #define sctp_sbspace_sub(a,b) (((a) > (b)) ? ((a) - (b)) : 0) 90 91 /* 92 * I tried to cache the readq entries at one point. But the reality 93 * is that it did not add any performance since this meant we had to 94 * lock the STCB on read. And at that point once you have to do an 95 * extra lock, it really does not matter if the lock is in the ZONE 96 * stuff or in our code. Note that this same problem would occur with 97 * an mbuf cache as well so it is not really worth doing, at least 98 * right now :-D 99 */ 100 #ifdef INVARIANTS 101 #define sctp_free_a_readq(_stcb, _readq) { \ 102 if ((_readq)->on_strm_q) \ 103 panic("On strm q stcb:%p readq:%p", (_stcb), (_readq)); \ 104 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \ 105 SCTP_DECR_READQ_COUNT(); \ 106 } 107 #else 108 #define sctp_free_a_readq(_stcb, _readq) { \ 109 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \ 110 SCTP_DECR_READQ_COUNT(); \ 111 } 112 #endif 113 114 #define sctp_alloc_a_readq(_stcb, _readq) { \ 115 (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \ 116 if ((_readq)) { \ 117 SCTP_INCR_READQ_COUNT(); \ 118 } \ 119 } 120 121 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \ 122 if ((_strmoq)->holds_key_ref) { \ 123 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \ 124 (_strmoq)->holds_key_ref = 0; \ 125 } \ 126 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \ 127 SCTP_DECR_STRMOQ_COUNT(); \ 128 } 129 130 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \ 131 (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \ 132 if ((_strmoq)) { \ 133 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \ 134 SCTP_INCR_STRMOQ_COUNT(); \ 135 (_strmoq)->holds_key_ref = 0; \ 136 } \ 137 } 138 139 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \ 140 if ((_chk)->holds_key_ref) {\ 141 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \ 142 (_chk)->holds_key_ref = 0; \ 143 } \ 144 if (_stcb) { \ 145 SCTP_TCB_LOCK_ASSERT((_stcb)); \ 146 if ((_chk)->whoTo) { \ 147 sctp_free_remote_addr((_chk)->whoTo); \ 148 (_chk)->whoTo = NULL; \ 149 } \ 150 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \ 151 (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \ 152 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 153 SCTP_DECR_CHK_COUNT(); \ 154 } else { \ 155 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 156 (_stcb)->asoc.free_chunk_cnt++; \ 157 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 158 } \ 159 } else { \ 160 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 161 SCTP_DECR_CHK_COUNT(); \ 162 } \ 163 } 164 165 #define sctp_alloc_a_chunk(_stcb, _chk) { \ 166 if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \ 167 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \ 168 if ((_chk)) { \ 169 SCTP_INCR_CHK_COUNT(); \ 170 (_chk)->whoTo = NULL; \ 171 (_chk)->holds_key_ref = 0; \ 172 } \ 173 } else { \ 174 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \ 175 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 176 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 177 (_chk)->holds_key_ref = 0; \ 178 SCTP_STAT_INCR(sctps_cached_chk); \ 179 (_stcb)->asoc.free_chunk_cnt--; \ 180 } \ 181 } 182 183 184 #define sctp_free_remote_addr(__net) { \ 185 if ((__net)) { \ 186 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \ 187 (void)SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \ 188 (void)SCTP_OS_TIMER_STOP(&(__net)->pmtu_timer.timer); \ 189 (void)SCTP_OS_TIMER_STOP(&(__net)->hb_timer.timer); \ 190 if ((__net)->ro.ro_rt) { \ 191 RTFREE((__net)->ro.ro_rt); \ 192 (__net)->ro.ro_rt = NULL; \ 193 } \ 194 if ((__net)->src_addr_selected) { \ 195 sctp_free_ifa((__net)->ro._s_addr); \ 196 (__net)->ro._s_addr = NULL; \ 197 } \ 198 (__net)->src_addr_selected = 0; \ 199 (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \ 200 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \ 201 SCTP_DECR_RADDR_COUNT(); \ 202 } \ 203 } \ 204 } 205 206 #define sctp_sbfree(ctl, stcb, sb, m) { \ 207 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \ 208 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \ 209 if (((ctl)->do_not_ref_stcb == 0) && stcb) {\ 210 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \ 211 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \ 212 } \ 213 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \ 214 SCTP_BUF_TYPE(m) != MT_OOBDATA) \ 215 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \ 216 } 217 218 #define sctp_sballoc(stcb, sb, m) { \ 219 atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \ 220 atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \ 221 if (stcb) { \ 222 atomic_add_int(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \ 223 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \ 224 } \ 225 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \ 226 SCTP_BUF_TYPE(m) != MT_OOBDATA) \ 227 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \ 228 } 229 230 231 #define sctp_ucount_incr(val) { \ 232 val++; \ 233 } 234 235 #define sctp_ucount_decr(val) { \ 236 if (val > 0) { \ 237 val--; \ 238 } else { \ 239 val = 0; \ 240 } \ 241 } 242 243 #define sctp_mbuf_crush(data) do { \ 244 struct mbuf *_m; \ 245 _m = (data); \ 246 while (_m && (SCTP_BUF_LEN(_m) == 0)) { \ 247 (data) = SCTP_BUF_NEXT(_m); \ 248 SCTP_BUF_NEXT(_m) = NULL; \ 249 sctp_m_free(_m); \ 250 _m = (data); \ 251 } \ 252 } while (0) 253 254 #define sctp_flight_size_decrease(tp1) do { \ 255 if (tp1->whoTo->flight_size >= tp1->book_size) \ 256 tp1->whoTo->flight_size -= tp1->book_size; \ 257 else \ 258 tp1->whoTo->flight_size = 0; \ 259 } while (0) 260 261 #define sctp_flight_size_increase(tp1) do { \ 262 (tp1)->whoTo->flight_size += (tp1)->book_size; \ 263 } while (0) 264 265 #ifdef SCTP_FS_SPEC_LOG 266 #define sctp_total_flight_decrease(stcb, tp1) do { \ 267 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \ 268 stcb->asoc.fs_index = 0;\ 269 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \ 270 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \ 271 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \ 272 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \ 273 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \ 274 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \ 275 stcb->asoc.fs_index++; \ 276 tp1->window_probe = 0; \ 277 if (stcb->asoc.total_flight >= tp1->book_size) { \ 278 stcb->asoc.total_flight -= tp1->book_size; \ 279 if (stcb->asoc.total_flight_count > 0) \ 280 stcb->asoc.total_flight_count--; \ 281 } else { \ 282 stcb->asoc.total_flight = 0; \ 283 stcb->asoc.total_flight_count = 0; \ 284 } \ 285 } while (0) 286 287 #define sctp_total_flight_increase(stcb, tp1) do { \ 288 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \ 289 stcb->asoc.fs_index = 0;\ 290 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \ 291 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \ 292 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \ 293 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \ 294 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \ 295 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \ 296 stcb->asoc.fs_index++; \ 297 (stcb)->asoc.total_flight_count++; \ 298 (stcb)->asoc.total_flight += (tp1)->book_size; \ 299 } while (0) 300 301 #else 302 303 #define sctp_total_flight_decrease(stcb, tp1) do { \ 304 tp1->window_probe = 0; \ 305 if (stcb->asoc.total_flight >= tp1->book_size) { \ 306 stcb->asoc.total_flight -= tp1->book_size; \ 307 if (stcb->asoc.total_flight_count > 0) \ 308 stcb->asoc.total_flight_count--; \ 309 } else { \ 310 stcb->asoc.total_flight = 0; \ 311 stcb->asoc.total_flight_count = 0; \ 312 } \ 313 } while (0) 314 315 #define sctp_total_flight_increase(stcb, tp1) do { \ 316 (stcb)->asoc.total_flight_count++; \ 317 (stcb)->asoc.total_flight += (tp1)->book_size; \ 318 } while (0) 319 320 #endif 321 322 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold) 323 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count) 324 325 struct sctp_nets; 326 struct sctp_inpcb; 327 struct sctp_tcb; 328 struct sctphdr; 329 330 331 void sctp_close(struct socket *so); 332 int sctp_disconnect(struct socket *so); 333 void sctp_ctlinput(int, struct sockaddr *, void *); 334 int sctp_ctloutput(struct socket *, struct sockopt *); 335 336 #ifdef INET 337 void sctp_input_with_port(struct mbuf *, int, uint16_t); 338 int sctp_input(struct mbuf **, int *, int); 339 340 #endif 341 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint16_t); 342 void sctp_drain(void); 343 void sctp_init(void); 344 void 345 sctp_notify(struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *, 346 uint8_t, uint8_t, uint16_t, uint16_t); 347 void sctp_finish(void); 348 int sctp_flush(struct socket *, int); 349 int sctp_shutdown(struct socket *); 350 int 351 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 int sctp_ingetaddr(struct socket *, struct sockaddr **); 357 int sctp_peeraddr(struct socket *, struct sockaddr **); 358 int sctp_listen(struct socket *, int, struct thread *); 359 int sctp_accept(struct socket *, struct sockaddr **); 360 361 #endif /* _KERNEL */ 362 363 #endif /* !_NETINET_SCTP_VAR_H_ */ 364