1 /*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
13 *
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /* $KAME: sctp_var.h,v 1.24 2005/03/06 16:04:19 itojun Exp $ */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/8.0/sys/netinet/sctp_var.h 189790 2009-03-14 13:42:13Z rrs $");
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
52 /* managing mobility_feature in inpcb (by micchie) */
53 #define sctp_mobility_feature_on(inp, feature) (inp->sctp_mobility_features |= feature)
54 #define sctp_mobility_feature_off(inp, feature) (inp->sctp_mobility_features &= ~feature)
55 #define sctp_is_mobility_feature_on(inp, feature) (inp->sctp_mobility_features & feature)
56 #define sctp_is_mobility_feature_off(inp, feature) ((inp->sctp_mobility_features & feature) == 0)
57
58 #define sctp_maxspace(sb) (max((sb)->sb_hiwat,SCTP_MINIMAL_RWND))
59
60 #define sctp_sbspace(asoc, sb) ((long) ((sctp_maxspace(sb) > (asoc)->sb_cc) ? (sctp_maxspace(sb) - (asoc)->sb_cc) : 0))
61
62 #define sctp_sbspace_failedmsgs(sb) ((long) ((sctp_maxspace(sb) > (sb)->sb_cc) ? (sctp_maxspace(sb) - (sb)->sb_cc) : 0))
63
64 #define sctp_sbspace_sub(a,b) ((a > b) ? (a - b) : 0)
65
66 /*
67 * I tried to cache the readq entries at one point. But the reality
68 * is that it did not add any performance since this meant we had to
69 * lock the STCB on read. And at that point once you have to do an
70 * extra lock, it really does not matter if the lock is in the ZONE
71 * stuff or in our code. Note that this same problem would occur with
72 * an mbuf cache as well so it is not really worth doing, at least
73 * right now :-D
74 */
75
76 #define sctp_free_a_readq(_stcb, _readq) { \
77 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), (_readq)); \
78 SCTP_DECR_READQ_COUNT(); \
79 }
80
81 #define sctp_alloc_a_readq(_stcb, _readq) { \
82 (_readq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_readq), struct sctp_queued_to_read); \
83 if ((_readq)) { \
84 SCTP_INCR_READQ_COUNT(); \
85 } \
86 }
87
88 #define sctp_free_a_strmoq(_stcb, _strmoq) { \
89 if ((_strmoq)->holds_key_ref) { \
90 sctp_auth_key_release(stcb, sp->auth_keyid); \
91 (_strmoq)->holds_key_ref = 0; \
92 } \
93 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), (_strmoq)); \
94 SCTP_DECR_STRMOQ_COUNT(); \
95 }
96
97 #define sctp_alloc_a_strmoq(_stcb, _strmoq) { \
98 (_strmoq) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_strmoq), struct sctp_stream_queue_pending); \
99 if ((_strmoq)) { \
100 memset(_strmoq, 0, sizeof(struct sctp_stream_queue_pending)); \
101 SCTP_INCR_STRMOQ_COUNT(); \
102 (_strmoq)->holds_key_ref = 0; \
103 } \
104 }
105
106 #define sctp_free_a_chunk(_stcb, _chk) { \
107 if ((_chk)->holds_key_ref) {\
108 sctp_auth_key_release((_stcb), (_chk)->auth_keyid); \
109 (_chk)->holds_key_ref = 0; \
110 } \
111 if(_stcb) { \
112 SCTP_TCB_LOCK_ASSERT((_stcb)); \
113 if ((_chk)->whoTo) { \
114 sctp_free_remote_addr((_chk)->whoTo); \
115 (_chk)->whoTo = NULL; \
116 } \
117 if (((_stcb)->asoc.free_chunk_cnt > SCTP_BASE_SYSCTL(sctp_asoc_free_resc_limit)) || \
118 (SCTP_BASE_INFO(ipi_free_chunks) > SCTP_BASE_SYSCTL(sctp_system_free_resc_limit))) { \
119 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
120 SCTP_DECR_CHK_COUNT(); \
121 } else { \
122 TAILQ_INSERT_TAIL(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
123 (_stcb)->asoc.free_chunk_cnt++; \
124 atomic_add_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
125 } \
126 } else { \
127 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), (_chk)); \
128 SCTP_DECR_CHK_COUNT(); \
129 } \
130 }
131
132 #define sctp_alloc_a_chunk(_stcb, _chk) { \
133 if (TAILQ_EMPTY(&(_stcb)->asoc.free_chunks)) { \
134 (_chk) = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_chunk), struct sctp_tmit_chunk); \
135 if ((_chk)) { \
136 SCTP_INCR_CHK_COUNT(); \
137 (_chk)->whoTo = NULL; \
138 (_chk)->holds_key_ref = 0; \
139 } \
140 } else { \
141 (_chk) = TAILQ_FIRST(&(_stcb)->asoc.free_chunks); \
142 TAILQ_REMOVE(&(_stcb)->asoc.free_chunks, (_chk), sctp_next); \
143 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); \
144 (_chk)->holds_key_ref = 0; \
145 SCTP_STAT_INCR(sctps_cached_chk); \
146 (_stcb)->asoc.free_chunk_cnt--; \
147 } \
148 }
149
150
151 #define sctp_free_remote_addr(__net) { \
152 if ((__net)) { \
153 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&(__net)->ref_count)) { \
154 (void)SCTP_OS_TIMER_STOP(&(__net)->rxt_timer.timer); \
155 (void)SCTP_OS_TIMER_STOP(&(__net)->pmtu_timer.timer); \
156 (void)SCTP_OS_TIMER_STOP(&(__net)->fr_timer.timer); \
157 if ((__net)->ro.ro_rt) { \
158 RTFREE((__net)->ro.ro_rt); \
159 (__net)->ro.ro_rt = NULL; \
160 } \
161 if ((__net)->src_addr_selected) { \
162 sctp_free_ifa((__net)->ro._s_addr); \
163 (__net)->ro._s_addr = NULL; \
164 } \
165 (__net)->src_addr_selected = 0; \
166 (__net)->dest_state = SCTP_ADDR_NOT_REACHABLE; \
167 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_net), (__net)); \
168 SCTP_DECR_RADDR_COUNT(); \
169 } \
170 } \
171 }
172
173 #define sctp_sbfree(ctl, stcb, sb, m) { \
174 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_cc, SCTP_BUF_LEN((m))); \
175 SCTP_SAVE_ATOMIC_DECREMENT(&(sb)->sb_mbcnt, MSIZE); \
176 if (((ctl)->do_not_ref_stcb == 0) && stcb) {\
177 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.sb_cc, SCTP_BUF_LEN((m))); \
178 SCTP_SAVE_ATOMIC_DECREMENT(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
179 } \
180 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
181 SCTP_BUF_TYPE(m) != MT_OOBDATA) \
182 atomic_subtract_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
183 }
184
185 #define sctp_sballoc(stcb, sb, m) { \
186 atomic_add_int(&(sb)->sb_cc,SCTP_BUF_LEN((m))); \
187 atomic_add_int(&(sb)->sb_mbcnt, MSIZE); \
188 if (stcb) { \
189 atomic_add_int(&(stcb)->asoc.sb_cc,SCTP_BUF_LEN((m))); \
190 atomic_add_int(&(stcb)->asoc.my_rwnd_control_len, MSIZE); \
191 } \
192 if (SCTP_BUF_TYPE(m) != MT_DATA && SCTP_BUF_TYPE(m) != MT_HEADER && \
193 SCTP_BUF_TYPE(m) != MT_OOBDATA) \
194 atomic_add_int(&(sb)->sb_ctl,SCTP_BUF_LEN((m))); \
195 }
196
197
198 #define sctp_ucount_incr(val) { \
199 val++; \
200 }
201
202 #define sctp_ucount_decr(val) { \
203 if (val > 0) { \
204 val--; \
205 } else { \
206 val = 0; \
207 } \
208 }
209
210 #define sctp_mbuf_crush(data) do { \
211 struct mbuf *_m; \
212 _m = (data); \
213 while(_m && (SCTP_BUF_LEN(_m) == 0)) { \
214 (data) = SCTP_BUF_NEXT(_m); \
215 SCTP_BUF_NEXT(_m) = NULL; \
216 sctp_m_free(_m); \
217 _m = (data); \
218 } \
219 } while (0)
220
221 #define sctp_flight_size_decrease(tp1) do { \
222 if (tp1->whoTo->flight_size >= tp1->book_size) \
223 tp1->whoTo->flight_size -= tp1->book_size; \
224 else \
225 tp1->whoTo->flight_size = 0; \
226 } while (0)
227
228 #define sctp_flight_size_increase(tp1) do { \
229 (tp1)->whoTo->flight_size += (tp1)->book_size; \
230 } while (0)
231
232 #ifdef SCTP_FS_SPEC_LOG
233 #define sctp_total_flight_decrease(stcb, tp1) do { \
234 if(stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
235 stcb->asoc.fs_index = 0;\
236 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
237 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \
238 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
239 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
240 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 0; \
241 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 1; \
242 stcb->asoc.fs_index++; \
243 tp1->window_probe = 0; \
244 if (stcb->asoc.total_flight >= tp1->book_size) { \
245 stcb->asoc.total_flight -= tp1->book_size; \
246 if (stcb->asoc.total_flight_count > 0) \
247 stcb->asoc.total_flight_count--; \
248 } else { \
249 stcb->asoc.total_flight = 0; \
250 stcb->asoc.total_flight_count = 0; \
251 } \
252 } while (0)
253
254 #define sctp_total_flight_increase(stcb, tp1) do { \
255 if(stcb->asoc.fs_index > SCTP_FS_SPEC_LOG_SIZE) \
256 stcb->asoc.fs_index = 0;\
257 stcb->asoc.fslog[stcb->asoc.fs_index].total_flight = stcb->asoc.total_flight; \
258 stcb->asoc.fslog[stcb->asoc.fs_index].tsn = tp1->rec.data.TSN_seq; \
259 stcb->asoc.fslog[stcb->asoc.fs_index].book = tp1->book_size; \
260 stcb->asoc.fslog[stcb->asoc.fs_index].sent = tp1->sent; \
261 stcb->asoc.fslog[stcb->asoc.fs_index].incr = 1; \
262 stcb->asoc.fslog[stcb->asoc.fs_index].decr = 0; \
263 stcb->asoc.fs_index++; \
264 (stcb)->asoc.total_flight_count++; \
265 (stcb)->asoc.total_flight += (tp1)->book_size; \
266 } while (0)
267
268 #else
269
270 #define sctp_total_flight_decrease(stcb, tp1) do { \
271 tp1->window_probe = 0; \
272 if (stcb->asoc.total_flight >= tp1->book_size) { \
273 stcb->asoc.total_flight -= tp1->book_size; \
274 if (stcb->asoc.total_flight_count > 0) \
275 stcb->asoc.total_flight_count--; \
276 } else { \
277 stcb->asoc.total_flight = 0; \
278 stcb->asoc.total_flight_count = 0; \
279 } \
280 } while (0)
281
282 #define sctp_total_flight_increase(stcb, tp1) do { \
283 (stcb)->asoc.total_flight_count++; \
284 (stcb)->asoc.total_flight += (tp1)->book_size; \
285 } while (0)
286
287 #endif
288
289
290 struct sctp_nets;
291 struct sctp_inpcb;
292 struct sctp_tcb;
293 struct sctphdr;
294
295
296 void sctp_close(struct socket *so);
297 int sctp_disconnect(struct socket *so);
298
299 void sctp_ctlinput __P((int, struct sockaddr *, void *));
300 int sctp_ctloutput __P((struct socket *, struct sockopt *));
301 void sctp_input_with_port __P((struct mbuf *, int, uint16_t));
302 void sctp_input __P((struct mbuf *, int));
303 void sctp_pathmtu_adjustment __P((struct sctp_inpcb *, struct sctp_tcb *, struct sctp_nets *, uint16_t));
304 void sctp_drain __P((void));
305 void sctp_init __P((void));
306
307 void sctp_finish(void);
308
309 int sctp_flush(struct socket *, int);
310 int sctp_shutdown __P((struct socket *));
311 void sctp_notify
312 __P((struct sctp_inpcb *, struct ip *ip, struct sctphdr *,
313 struct sockaddr *, struct sctp_tcb *,
314 struct sctp_nets *));
315
316 int sctp_bindx(struct socket *, int, struct sockaddr_storage *,
317 int, int, struct proc *);
318
319 /* can't use sctp_assoc_t here */
320 int sctp_peeloff(struct socket *, struct socket *, int, caddr_t, int *);
321
322 int sctp_ingetaddr(struct socket *,
323 struct sockaddr **
324 );
325
326 int sctp_peeraddr(struct socket *,
327 struct sockaddr **
328 );
329
330 int sctp_listen(struct socket *, int, struct thread *);
331
332 int sctp_accept(struct socket *, struct sockaddr **);
333
334 #endif /* _KERNEL */
335
336 #endif /* !_NETINET_SCTP_VAR_H_ */
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