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 #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 #ifdef INVARIANTS
103 #define sctp_free_a_readq(_stcb, _readq) { \
104 if ((_readq)->on_strm_q) \
105 panic("On strm q stcb:%p readq:%p", (_stcb), (_readq)); \
106 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
107 SCTP_DECR_READQ_COUNT(); \
108 }
109 #else
110 #define sctp_free_a_readq(_stcb, _readq) { \
111 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
112 SCTP_DECR_READQ_COUNT(); \
113 }
114 #endif
115
116 #define sctp_alloc_a_readq(_stcb, _readq) { \
117 (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \
118 if ((_readq)) { \
119 SCTP_INCR_READQ_COUNT(); \
120 } \
121 }
122
123 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \
124 if ((_strmoq)->holds_key_ref) { \
125 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \
126 (_strmoq)->holds_key_ref = 0; \
127 } \
128 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \
129 SCTP_DECR_STRMOQ_COUNT(); \
130 }
131
132 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \
133 (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \
134 if ((_strmoq)) { \
135 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \
136 SCTP_INCR_STRMOQ_COUNT(); \
137 (_strmoq)->holds_key_ref = 0; \
138 } \
139 }
140
141 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \
142 if ((_chk)->holds_key_ref) {\
143 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \
144 (_chk)->holds_key_ref = 0; \
145 } \
146 if (_stcb) { \
147 SCTP_TCB_LOCK_ASSERT((_stcb)); \
148 if ((_chk)->whoTo) { \
149 sctp_free_remote_addr((_chk)->whoTo); \
150 (_chk)->whoTo = NULL; \
151 } \
152 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \
153 (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \
154 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
155 SCTP_DECR_CHK_COUNT(); \
156 } else { \
157 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
158 (_stcb)->asoc.free_chunk_cnt++; \
159 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
160 } \
161 } else { \
162 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
163 SCTP_DECR_CHK_COUNT(); \
164 } \
165 }
166
167 #define sctp_alloc_a_chunk(_stcb, _chk) { \
168 if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \
169 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \
170 if ((_chk)) { \
171 SCTP_INCR_CHK_COUNT(); \
172 (_chk)->whoTo = NULL; \
173 (_chk)->holds_key_ref = 0; \
174 } \
175 } else { \
176 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \
177 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
178 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
179 (_chk)->holds_key_ref = 0; \
180 SCTP_STAT_INCR(sctps_cached_chk); \
181 (_stcb)->asoc.free_chunk_cnt--; \
182 } \
183 }
184
185
186 #define sctp_free_remote_addr(__net) { \
187 if ((__net)) { \
188 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \
189 if ((__net)->ro.ro_rt) { \
190 RTFREE((__net)->ro.ro_rt); \
191 (__net)->ro.ro_rt = NULL; \
192 } \
193 if ((__net)->src_addr_selected) { \
194 sctp_free_ifa((__net)->ro._s_addr); \
195 (__net)->ro._s_addr = NULL; \
196 } \
197 (__net)->src_addr_selected = 0; \
198 (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \
199 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \
200 SCTP_DECR_RADDR_COUNT(); \
201 } \
202 } \
203 }
204
205 #define sctp_sbfree(ctl, stcb, sb, m) { \
206 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \
207 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \
208 if (((ctl)->do_not_ref_stcb == 0) && stcb) {\
209 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
210 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
211 } \
212 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
213 SCTP_BUF_TYPE(m) != MT_OOBDATA) \
214 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
215 }
216
217 #define sctp_sballoc(stcb, sb, m) { \
218 atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \
219 atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \
220 if (stcb) { \
221 atomic_add_int(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
222 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
223 } \
224 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
225 SCTP_BUF_TYPE(m) != MT_OOBDATA) \
226 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
227 }
228
229
230 #define sctp_ucount_incr(val) { \
231 val++; \
232 }
233
234 #define sctp_ucount_decr(val) { \
235 if (val > 0) { \
236 val--; \
237 } else { \
238 val = 0; \
239 } \
240 }
241
242 #define sctp_mbuf_crush(data) do { \
243 struct mbuf *_m; \
244 _m = (data); \
245 while (_m && (SCTP_BUF_LEN(_m) == 0)) { \
246 (data) = SCTP_BUF_NEXT(_m); \
247 SCTP_BUF_NEXT(_m) = NULL; \
248 sctp_m_free(_m); \
249 _m = (data); \
250 } \
251 } while (0)
252
253 #define sctp_flight_size_decrease(tp1) do { \
254 if (tp1->whoTo->flight_size >= tp1->book_size) \
255 tp1->whoTo->flight_size -= tp1->book_size; \
256 else \
257 tp1->whoTo->flight_size = 0; \
258 } while (0)
259
260 #define sctp_flight_size_increase(tp1) do { \
261 (tp1)->whoTo->flight_size += (tp1)->book_size; \
262 } while (0)
263
264 #ifdef SCTP_FS_SPEC_LOG
265 #define sctp_total_flight_decrease(stcb, tp1) do { \
266 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
267 stcb->asoc.fs_index = 0;\
268 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
269 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \
270 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
271 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
272 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \
273 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \
274 stcb->asoc.fs_index++; \
275 tp1->window_probe = 0; \
276 if (stcb->asoc.total_flight >= tp1->book_size) { \
277 stcb->asoc.total_flight -= tp1->book_size; \
278 if (stcb->asoc.total_flight_count > 0) \
279 stcb->asoc.total_flight_count--; \
280 } else { \
281 stcb->asoc.total_flight = 0; \
282 stcb->asoc.total_flight_count = 0; \
283 } \
284 } while (0)
285
286 #define sctp_total_flight_increase(stcb, tp1) do { \
287 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
288 stcb->asoc.fs_index = 0;\
289 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
290 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \
291 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
292 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
293 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \
294 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \
295 stcb->asoc.fs_index++; \
296 (stcb)->asoc.total_flight_count++; \
297 (stcb)->asoc.total_flight += (tp1)->book_size; \
298 } while (0)
299
300 #else
301
302 #define sctp_total_flight_decrease(stcb, tp1) do { \
303 tp1->window_probe = 0; \
304 if (stcb->asoc.total_flight >= tp1->book_size) { \
305 stcb->asoc.total_flight -= tp1->book_size; \
306 if (stcb->asoc.total_flight_count > 0) \
307 stcb->asoc.total_flight_count--; \
308 } else { \
309 stcb->asoc.total_flight = 0; \
310 stcb->asoc.total_flight_count = 0; \
311 } \
312 } while (0)
313
314 #define sctp_total_flight_increase(stcb, tp1) do { \
315 (stcb)->asoc.total_flight_count++; \
316 (stcb)->asoc.total_flight += (tp1)->book_size; \
317 } while (0)
318
319 #endif
320
321 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold)
322 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count)
323
324 struct sctp_nets;
325 struct sctp_inpcb;
326 struct sctp_tcb;
327 struct sctphdr;
328
329
330 void sctp_close(struct socket *so);
331 int sctp_disconnect(struct socket *so);
332 void sctp_ctlinput(int, struct sockaddr *, void *);
333 int sctp_ctloutput(struct socket *, struct sockopt *);
334 #ifdef INET
335 void sctp_input_with_port(struct mbuf *, int, uint16_t);
336 int sctp_input(struct mbuf **, int *, int);
337 #endif
338 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint16_t);
339 void sctp_drain(void);
340 void sctp_init(void);
341 void
342 sctp_notify(struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *,
343 uint8_t, uint8_t, uint16_t, uint32_t);
344 int sctp_flush(struct socket *, int);
345 int sctp_shutdown(struct socket *);
346 int
347 sctp_bindx(struct socket *, int, struct sockaddr_storage *,
348 int, int, struct proc *);
349
350 /* can't use sctp_assoc_t here */
351 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
352 int sctp_ingetaddr(struct socket *, struct sockaddr **);
353 int sctp_peeraddr(struct socket *, struct sockaddr **);
354 int sctp_listen(struct socket *, int, struct thread *);
355 int sctp_accept(struct socket *, struct sockaddr **);
356
357 #endif /* _KERNEL */
358
359 #endif /* !_NETINET_SCTP_VAR_H_ */
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