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 protosw sctp_seqpacket_protosw, sctp_stream_protosw;
46
47 #define sctp_feature_on(inp, feature) (inp->sctp_features |= feature)
48 #define sctp_feature_off(inp, feature) (inp->sctp_features &= ~feature)
49 #define sctp_is_feature_on(inp, feature) ((inp->sctp_features & feature) == feature)
50 #define sctp_is_feature_off(inp, feature) ((inp->sctp_features & feature) == 0)
51
52 #define sctp_stcb_feature_on(inp, stcb, feature) {\
53 if (stcb) { \
54 stcb->asoc.sctp_features |= feature; \
55 } else if (inp) { \
56 inp->sctp_features |= feature; \
57 } \
58 }
59 #define sctp_stcb_feature_off(inp, stcb, feature) {\
60 if (stcb) { \
61 stcb->asoc.sctp_features &= ~feature; \
62 } else if (inp) { \
63 inp->sctp_features &= ~feature; \
64 } \
65 }
66 #define sctp_stcb_is_feature_on(inp, stcb, feature) \
67 (((stcb != NULL) && \
68 ((stcb->asoc.sctp_features & feature) == feature)) || \
69 ((stcb == NULL) && (inp != NULL) && \
70 ((inp->sctp_features & feature) == feature)))
71 #define sctp_stcb_is_feature_off(inp, stcb, feature) \
72 (((stcb != NULL) && \
73 ((stcb->asoc.sctp_features & feature) == 0)) || \
74 ((stcb == NULL) && (inp != NULL) && \
75 ((inp->sctp_features & feature) == 0)) || \
76 ((stcb == NULL) && (inp == NULL)))
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) > SCTP_SBAVAIL(sb)) ? (sctp_maxspace(sb) - SCTP_SBAVAIL(sb)) : 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 #ifdef INVARIANTS
102 #define sctp_free_a_readq(_stcb, _readq) { \
103 if ((_readq)->on_strm_q) \
104 panic("On strm q stcb:%p readq:%p", (_stcb), (_readq)); \
105 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
106 SCTP_DECR_READQ_COUNT(); \
107 }
108 #else
109 #define sctp_free_a_readq(_stcb, _readq) { \
110 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
111 SCTP_DECR_READQ_COUNT(); \
112 }
113 #endif
114
115 #define sctp_alloc_a_readq(_stcb, _readq) { \
116 (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \
117 if ((_readq)) { \
118 SCTP_INCR_READQ_COUNT(); \
119 } \
120 }
121
122 #define sctp_free_a_strmoq(_stcb, _strmoq, _so_locked) { \
123 if ((_strmoq)->holds_key_ref) { \
124 sctp_auth_key_release(stcb, sp->auth_keyid, _so_locked); \
125 (_strmoq)->holds_key_ref = 0; \
126 } \
127 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \
128 SCTP_DECR_STRMOQ_COUNT(); \
129 }
130
131 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \
132 (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \
133 if ((_strmoq)) { \
134 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \
135 SCTP_INCR_STRMOQ_COUNT(); \
136 (_strmoq)->holds_key_ref = 0; \
137 } \
138 }
139
140 #define sctp_free_a_chunk(_stcb, _chk, _so_locked) { \
141 if ((_chk)->holds_key_ref) {\
142 sctp_auth_key_release((_stcb), (_chk)->auth_keyid, _so_locked); \
143 (_chk)->holds_key_ref = 0; \
144 } \
145 if (_stcb) { \
146 SCTP_TCB_LOCK_ASSERT((_stcb)); \
147 if ((_chk)->whoTo) { \
148 sctp_free_remote_addr((_chk)->whoTo); \
149 (_chk)->whoTo = NULL; \
150 } \
151 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \
152 (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \
153 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
154 SCTP_DECR_CHK_COUNT(); \
155 } else { \
156 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
157 (_stcb)->asoc.free_chunk_cnt++; \
158 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
159 } \
160 } else { \
161 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
162 SCTP_DECR_CHK_COUNT(); \
163 } \
164 }
165
166 #define sctp_alloc_a_chunk(_stcb, _chk) { \
167 if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \
168 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \
169 if ((_chk)) { \
170 SCTP_INCR_CHK_COUNT(); \
171 (_chk)->whoTo = NULL; \
172 (_chk)->holds_key_ref = 0; \
173 } \
174 } else { \
175 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \
176 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
177 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
178 (_chk)->holds_key_ref = 0; \
179 SCTP_STAT_INCR(sctps_cached_chk); \
180 (_stcb)->asoc.free_chunk_cnt--; \
181 } \
182 }
183
184 #define sctp_free_remote_addr(__net) { \
185 if ((__net)) { \
186 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \
187 RO_NHFREE(&(__net)->ro); \
188 if ((__net)->src_addr_selected) { \
189 sctp_free_ifa((__net)->ro._s_addr); \
190 (__net)->ro._s_addr = NULL; \
191 } \
192 (__net)->src_addr_selected = 0; \
193 (__net)->dest_state &= ~SCTP_ADDR_REACHABLE; \
194 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \
195 SCTP_DECR_RADDR_COUNT(); \
196 } \
197 } \
198 }
199
200 #define sctp_sbfree(ctl, stcb, sb, m) { \
201 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \
202 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \
203 if (((ctl)->do_not_ref_stcb == 0) && stcb) {\
204 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
205 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
206 } \
207 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
208 SCTP_BUF_TYPE(m) != MT_OOBDATA) \
209 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
210 }
211
212 #define sctp_sballoc(stcb, sb, m) { \
213 atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \
214 atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \
215 if (stcb) { \
216 atomic_add_int(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
217 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
218 } \
219 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
220 SCTP_BUF_TYPE(m) != MT_OOBDATA) \
221 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
222 }
223
224 #define sctp_ucount_incr(val) { \
225 val++; \
226 }
227
228 #define sctp_ucount_decr(val) { \
229 if (val > 0) { \
230 val--; \
231 } else { \
232 val = 0; \
233 } \
234 }
235
236 #define sctp_mbuf_crush(data) do { \
237 struct mbuf *_m; \
238 _m = (data); \
239 while (_m && (SCTP_BUF_LEN(_m) == 0)) { \
240 (data) = SCTP_BUF_NEXT(_m); \
241 SCTP_BUF_NEXT(_m) = NULL; \
242 sctp_m_free(_m); \
243 _m = (data); \
244 } \
245 } while (0)
246
247 #define sctp_flight_size_decrease(tp1) do { \
248 if (tp1->whoTo->flight_size >= tp1->book_size) \
249 tp1->whoTo->flight_size -= tp1->book_size; \
250 else \
251 tp1->whoTo->flight_size = 0; \
252 } while (0)
253
254 #define sctp_flight_size_increase(tp1) do { \
255 (tp1)->whoTo->flight_size += (tp1)->book_size; \
256 } while (0)
257
258 #ifdef SCTP_FS_SPEC_LOG
259 #define sctp_total_flight_decrease(stcb, tp1) do { \
260 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
261 stcb->asoc.fs_index = 0;\
262 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
263 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \
264 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
265 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
266 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \
267 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \
268 stcb->asoc.fs_index++; \
269 tp1->window_probe = 0; \
270 if (stcb->asoc.total_flight >= tp1->book_size) { \
271 stcb->asoc.total_flight -= tp1->book_size; \
272 if (stcb->asoc.total_flight_count > 0) \
273 stcb->asoc.total_flight_count--; \
274 } else { \
275 stcb->asoc.total_flight = 0; \
276 stcb->asoc.total_flight_count = 0; \
277 } \
278 } while (0)
279
280 #define sctp_total_flight_increase(stcb, tp1) do { \
281 if (stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
282 stcb->asoc.fs_index = 0;\
283 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
284 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.tsn; \
285 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
286 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
287 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \
288 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \
289 stcb->asoc.fs_index++; \
290 (stcb)->asoc.total_flight_count++; \
291 (stcb)->asoc.total_flight += (tp1)->book_size; \
292 } while (0)
293
294 #else
295
296 #define sctp_total_flight_decrease(stcb, tp1) do { \
297 tp1->window_probe = 0; \
298 if (stcb->asoc.total_flight >= tp1->book_size) { \
299 stcb->asoc.total_flight -= tp1->book_size; \
300 if (stcb->asoc.total_flight_count > 0) \
301 stcb->asoc.total_flight_count--; \
302 } else { \
303 stcb->asoc.total_flight = 0; \
304 stcb->asoc.total_flight_count = 0; \
305 } \
306 } while (0)
307
308 #define sctp_total_flight_increase(stcb, tp1) do { \
309 (stcb)->asoc.total_flight_count++; \
310 (stcb)->asoc.total_flight += (tp1)->book_size; \
311 } while (0)
312
313 #endif
314
315 #define SCTP_PF_ENABLED(_net) (_net->pf_threshold < _net->failure_threshold)
316 #define SCTP_NET_IS_PF(_net) (_net->pf_threshold < _net->error_count)
317
318 struct sctp_nets;
319 struct sctp_inpcb;
320 struct sctp_tcb;
321 struct sctphdr;
322
323 void sctp_close(struct socket *so);
324 int sctp_disconnect(struct socket *so);
325 ipproto_ctlinput_t sctp_ctlinput;
326 int sctp_ctloutput(struct socket *, struct sockopt *);
327 #ifdef INET
328 void sctp_input_with_port(struct mbuf *, int, uint16_t);
329 int sctp_input(struct mbuf **, int *, int);
330 #endif
331 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint32_t, bool);
332 void
333 sctp_notify(struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *,
334 uint8_t, uint8_t, uint16_t, uint32_t);
335 int sctp_flush(struct socket *, int);
336 int sctp_shutdown(struct socket *);
337 int
338 sctp_bindx(struct socket *, int, struct sockaddr_storage *,
339 int, int, struct proc *);
340
341 /* can't use sctp_assoc_t here */
342 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
343 int sctp_ingetaddr(struct socket *, struct sockaddr **);
344 int sctp_peeraddr(struct socket *, struct sockaddr **);
345 int sctp_listen(struct socket *, int, struct thread *);
346 int sctp_accept(struct socket *, struct sockaddr **);
347
348 #endif /* _KERNEL */
349
350 #endif /* !_NETINET_SCTP_VAR_H_ */
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