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 */ 100 101 #define sctp_free_a_readq(_stcb, _readq) { \ 102 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \ 103 SCTP_DECR_READQ_COUNT(); \ 104 } 105 106 #define sctp_alloc_a_readq(_stcb, _readq) { \ 107 (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \ 108 if ((_readq)) { \ 109 SCTP_INCR_READQ_COUNT(); \ 110 } \ 111 } 112 113 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \ 114 if ((_strmoq)->holds_key_ref) { \ 115 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \ 116 (_strmoq)->holds_key_ref = 0; \ 117 } \ 118 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \ 119 SCTP_DECR_STRMOQ_COUNT(); \ 120 } 121 122 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \ 123 (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \ 124 if ((_strmoq)) { \ 125 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \ 126 SCTP_INCR_STRMOQ_COUNT(); \ 127 (_strmoq)->holds_key_ref = 0; \ 128 } \ 129 } 130 131 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \ 132 if ((_chk)->holds_key_ref) {\ 133 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \ 134 (_chk)->holds_key_ref = 0; \ 135 } \ 136 if (_stcb) { \ 137 SCTP_TCB_LOCK_ASSERT((_stcb)); \ 138 if ((_chk)->whoTo) { \ 139 sctp_free_remote_addr((_chk)->whoTo); \ 140 (_chk)->whoTo = NULL; \ 141 } \ 142 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \ 143 (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \ 144 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 145 SCTP_DECR_CHK_COUNT(); \ 146 } else { \ 147 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 148 (_stcb)->asoc.free_chunk_cnt++; \ 149 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 150 } \ 151 } else { \ 152 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \ 153 SCTP_DECR_CHK_COUNT(); \ 154 } \ 155 } 156 157 #define sctp_alloc_a_chunk(_stcb, _chk) { \ 158 if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \ 159 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \ 160 if ((_chk)) { \ 161 SCTP_INCR_CHK_COUNT(); \ 162 (_chk)->whoTo = NULL; \ 163 (_chk)->holds_key_ref = 0; \ 164 } \ 165 } else { \ 166 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \ 167 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \ 168 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \ 169 (_chk)->holds_key_ref = 0; \ 170 SCTP_STAT_INCR(sctps_cached_chk); \ 171 (_stcb)->asoc.free_chunk_cnt--; \ 172 } \ 173 } 174 175 176 #define sctp_free_remote_addr(__net) { \ 177 if ((__net)) { \ 178 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \ 179 (void)SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \ 180 (void)SCTP_OS_TIMER_STOP(&(__net)->pmtu_timer.timer); \ 181 (void)SCTP_OS_TIMER_STOP(&(__net)->hb_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 void sctp_ctlinput(int, struct sockaddr *, void *); 326 int sctp_ctloutput(struct socket *, struct sockopt *); 327 328 #ifdef INET 329 void sctp_input_with_port(struct mbuf *, int, uint16_t); 330 int sctp_input(struct mbuf **, int *, int); 331 332 #endif 333 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint16_t); 334 void sctp_drain(void); 335 void sctp_init(void); 336 void sctp_finish(void); 337 int sctp_flush(struct socket *, int); 338 int sctp_shutdown(struct socket *); 339 void 340 sctp_notify(struct sctp_inpcb *, struct ip *ip, struct sctphdr *, 341 struct sockaddr *, struct sctp_tcb *, 342 struct sctp_nets *); 343 int 344 sctp_bindx(struct socket *, int, struct sockaddr_storage *, 345 int, int, struct proc *); 346 347 /* can't use sctp_assoc_t here */ 348 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *); 349 int sctp_ingetaddr(struct socket *, struct sockaddr **); 350 int sctp_peeraddr(struct socket *, struct sockaddr **); 351 int sctp_listen(struct socket *, int, struct thread *); 352 int sctp_accept(struct socket *, struct sockaddr **); 353 354 #endif /* _KERNEL */ 355 356 #endif /* !_NETINET_SCTP_VAR_H_ */ 357