xref: /freebsd/sys/netinet/sctp_var.h (revision 792bbaba989533a1fc93823df1720c8c4aaf0442)
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; \
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; \
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 #ifdef INET
336 void sctp_input_with_port(struct mbuf *, int, uint16_t);
337 int sctp_input(struct mbuf **, int *, int);
338 #endif
339 void sctp_pathmtu_adjustment(struct sctp_tcb *, uint16_t);
340 void sctp_drain(void);
341 void sctp_init(void);
342 void
343 sctp_notify(struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *,
344     uint8_t, uint8_t, uint16_t, uint16_t);
345 int sctp_flush(struct socket *, int);
346 int sctp_shutdown(struct socket *);
347 int
348 sctp_bindx(struct socket *, int, struct sockaddr_storage *,
349     int, int, struct proc *);
350 
351 /* can't use sctp_assoc_t here */
352 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
353 int sctp_ingetaddr(struct socket *, struct sockaddr **);
354 int sctp_peeraddr(struct socket *, struct sockaddr **);
355 int sctp_listen(struct socket *, int, struct thread *);
356 int sctp_accept(struct socket *, struct sockaddr **);
357 
358 #endif				/* _KERNEL */
359 
360 #endif				/* !_NETINET_SCTP_VAR_H_ */
361