diff options
Diffstat (limited to 'include/net/sctp/constants.h')
-rw-r--r-- | include/net/sctp/constants.h | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/include/net/sctp/constants.h b/include/net/sctp/constants.h new file mode 100644 index 000000000000..2b76c0f4babc --- /dev/null +++ b/include/net/sctp/constants.h | |||
@@ -0,0 +1,432 @@ | |||
1 | /* SCTP kernel reference Implementation | ||
2 | * (C) Copyright IBM Corp. 2001, 2004 | ||
3 | * Copyright (c) 1999-2000 Cisco, Inc. | ||
4 | * Copyright (c) 1999-2001 Motorola, Inc. | ||
5 | * Copyright (c) 2001 Intel Corp. | ||
6 | * | ||
7 | * This file is part of the SCTP kernel reference Implementation | ||
8 | * | ||
9 | * The SCTP reference implementation is free software; | ||
10 | * you can redistribute it and/or modify it under the terms of | ||
11 | * the GNU General Public License as published by | ||
12 | * the Free Software Foundation; either version 2, or (at your option) | ||
13 | * any later version. | ||
14 | * | ||
15 | * The SCTP reference implementation is distributed in the hope that it | ||
16 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied | ||
17 | * ************************ | ||
18 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | ||
19 | * See the GNU General Public License for more details. | ||
20 | * | ||
21 | * You should have received a copy of the GNU General Public License | ||
22 | * along with GNU CC; see the file COPYING. If not, write to | ||
23 | * the Free Software Foundation, 59 Temple Place - Suite 330, | ||
24 | * Boston, MA 02111-1307, USA. | ||
25 | * | ||
26 | * Please send any bug reports or fixes you make to the | ||
27 | * email address(es): | ||
28 | * lksctp developers <lksctp-developers@lists.sourceforge.net> | ||
29 | * | ||
30 | * Or submit a bug report through the following website: | ||
31 | * http://www.sf.net/projects/lksctp | ||
32 | * | ||
33 | * Written or modified by: | ||
34 | * La Monte H.P. Yarroll <piggy@acm.org> | ||
35 | * Karl Knutson <karl@athena.chicago.il.us> | ||
36 | * Randall Stewart <randall@stewart.chicago.il.us> | ||
37 | * Ken Morneau <kmorneau@cisco.com> | ||
38 | * Qiaobing Xie <qxie1@motorola.com> | ||
39 | * Xingang Guo <xingang.guo@intel.com> | ||
40 | * Sridhar Samudrala <samudrala@us.ibm.com> | ||
41 | * Daisy Chang <daisyc@us.ibm.com> | ||
42 | * | ||
43 | * Any bugs reported given to us we will try to fix... any fixes shared will | ||
44 | * be incorporated into the next SCTP release. | ||
45 | */ | ||
46 | |||
47 | #ifndef __sctp_constants_h__ | ||
48 | #define __sctp_constants_h__ | ||
49 | |||
50 | #include <linux/tcp.h> /* For TCP states used in sctp_sock_state_t */ | ||
51 | #include <linux/sctp.h> | ||
52 | #include <linux/ipv6.h> /* For ipv6hdr. */ | ||
53 | #include <net/sctp/user.h> | ||
54 | |||
55 | /* Value used for stream negotiation. */ | ||
56 | enum { SCTP_MAX_STREAM = 0xffff }; | ||
57 | enum { SCTP_DEFAULT_OUTSTREAMS = 10 }; | ||
58 | enum { SCTP_DEFAULT_INSTREAMS = SCTP_MAX_STREAM }; | ||
59 | |||
60 | /* Since CIDs are sparse, we need all four of the following | ||
61 | * symbols. CIDs are dense through SCTP_CID_BASE_MAX. | ||
62 | */ | ||
63 | #define SCTP_CID_BASE_MAX SCTP_CID_SHUTDOWN_COMPLETE | ||
64 | #define SCTP_CID_MAX SCTP_CID_ASCONF_ACK | ||
65 | |||
66 | #define SCTP_NUM_BASE_CHUNK_TYPES (SCTP_CID_BASE_MAX + 1) | ||
67 | #define SCTP_NUM_CHUNK_TYPES (SCTP_NUM_BASE_CHUNKTYPES + 2) | ||
68 | |||
69 | #define SCTP_NUM_ADDIP_CHUNK_TYPES 2 | ||
70 | |||
71 | #define SCTP_NUM_PRSCTP_CHUNK_TYPES 1 | ||
72 | |||
73 | /* These are the different flavours of event. */ | ||
74 | typedef enum { | ||
75 | |||
76 | SCTP_EVENT_T_CHUNK = 1, | ||
77 | SCTP_EVENT_T_TIMEOUT, | ||
78 | SCTP_EVENT_T_OTHER, | ||
79 | SCTP_EVENT_T_PRIMITIVE | ||
80 | |||
81 | } sctp_event_t; | ||
82 | |||
83 | #define SCTP_EVENT_T_MAX SCTP_EVENT_T_PRIMITIVE | ||
84 | #define SCTP_EVENT_T_NUM (SCTP_EVENT_T_MAX + 1) | ||
85 | |||
86 | /* As a convenience for the state machine, we append SCTP_EVENT_* and | ||
87 | * SCTP_ULP_* to the list of possible chunks. | ||
88 | */ | ||
89 | |||
90 | typedef enum { | ||
91 | SCTP_EVENT_TIMEOUT_NONE = 0, | ||
92 | SCTP_EVENT_TIMEOUT_T1_COOKIE, | ||
93 | SCTP_EVENT_TIMEOUT_T1_INIT, | ||
94 | SCTP_EVENT_TIMEOUT_T2_SHUTDOWN, | ||
95 | SCTP_EVENT_TIMEOUT_T3_RTX, | ||
96 | SCTP_EVENT_TIMEOUT_T4_RTO, | ||
97 | SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD, | ||
98 | SCTP_EVENT_TIMEOUT_HEARTBEAT, | ||
99 | SCTP_EVENT_TIMEOUT_SACK, | ||
100 | SCTP_EVENT_TIMEOUT_AUTOCLOSE, | ||
101 | } sctp_event_timeout_t; | ||
102 | |||
103 | #define SCTP_EVENT_TIMEOUT_MAX SCTP_EVENT_TIMEOUT_AUTOCLOSE | ||
104 | #define SCTP_NUM_TIMEOUT_TYPES (SCTP_EVENT_TIMEOUT_MAX + 1) | ||
105 | |||
106 | typedef enum { | ||
107 | SCTP_EVENT_NO_PENDING_TSN = 0, | ||
108 | SCTP_EVENT_ICMP_PROTO_UNREACH, | ||
109 | } sctp_event_other_t; | ||
110 | |||
111 | #define SCTP_EVENT_OTHER_MAX SCTP_EVENT_ICMP_PROTO_UNREACH | ||
112 | #define SCTP_NUM_OTHER_TYPES (SCTP_EVENT_OTHER_MAX + 1) | ||
113 | |||
114 | /* These are primitive requests from the ULP. */ | ||
115 | typedef enum { | ||
116 | SCTP_PRIMITIVE_ASSOCIATE = 0, | ||
117 | SCTP_PRIMITIVE_SHUTDOWN, | ||
118 | SCTP_PRIMITIVE_ABORT, | ||
119 | SCTP_PRIMITIVE_SEND, | ||
120 | SCTP_PRIMITIVE_REQUESTHEARTBEAT, | ||
121 | SCTP_PRIMITIVE_ASCONF, | ||
122 | } sctp_event_primitive_t; | ||
123 | |||
124 | #define SCTP_EVENT_PRIMITIVE_MAX SCTP_PRIMITIVE_ASCONF | ||
125 | #define SCTP_NUM_PRIMITIVE_TYPES (SCTP_EVENT_PRIMITIVE_MAX + 1) | ||
126 | |||
127 | /* We define here a utility type for manipulating subtypes. | ||
128 | * The subtype constructors all work like this: | ||
129 | * | ||
130 | * sctp_subtype_t foo = SCTP_ST_CHUNK(SCTP_CID_INIT); | ||
131 | */ | ||
132 | |||
133 | typedef union { | ||
134 | sctp_cid_t chunk; | ||
135 | sctp_event_timeout_t timeout; | ||
136 | sctp_event_other_t other; | ||
137 | sctp_event_primitive_t primitive; | ||
138 | } sctp_subtype_t; | ||
139 | |||
140 | #define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \ | ||
141 | static inline sctp_subtype_t \ | ||
142 | SCTP_ST_## _name (_type _arg) \ | ||
143 | { sctp_subtype_t _retval; _retval._elt = _arg; return _retval; } | ||
144 | |||
145 | SCTP_SUBTYPE_CONSTRUCTOR(CHUNK, sctp_cid_t, chunk) | ||
146 | SCTP_SUBTYPE_CONSTRUCTOR(TIMEOUT, sctp_event_timeout_t, timeout) | ||
147 | SCTP_SUBTYPE_CONSTRUCTOR(OTHER, sctp_event_other_t, other) | ||
148 | SCTP_SUBTYPE_CONSTRUCTOR(PRIMITIVE, sctp_event_primitive_t, primitive) | ||
149 | |||
150 | |||
151 | #define sctp_chunk_is_control(a) (a->chunk_hdr->type != SCTP_CID_DATA) | ||
152 | #define sctp_chunk_is_data(a) (a->chunk_hdr->type == SCTP_CID_DATA) | ||
153 | |||
154 | /* Calculate the actual data size in a data chunk */ | ||
155 | #define SCTP_DATA_SNDSIZE(c) ((int)((unsigned long)(c->chunk_end)\ | ||
156 | - (unsigned long)(c->chunk_hdr)\ | ||
157 | - sizeof(sctp_data_chunk_t))) | ||
158 | |||
159 | #define SCTP_MAX_ERROR_CAUSE SCTP_ERROR_NONEXIST_IP | ||
160 | #define SCTP_NUM_ERROR_CAUSE 10 | ||
161 | |||
162 | /* Internal error codes */ | ||
163 | typedef enum { | ||
164 | |||
165 | SCTP_IERROR_NO_ERROR = 0, | ||
166 | SCTP_IERROR_BASE = 1000, | ||
167 | SCTP_IERROR_NO_COOKIE, | ||
168 | SCTP_IERROR_BAD_SIG, | ||
169 | SCTP_IERROR_STALE_COOKIE, | ||
170 | SCTP_IERROR_NOMEM, | ||
171 | SCTP_IERROR_MALFORMED, | ||
172 | SCTP_IERROR_BAD_TAG, | ||
173 | SCTP_IERROR_BIG_GAP, | ||
174 | SCTP_IERROR_DUP_TSN, | ||
175 | SCTP_IERROR_HIGH_TSN, | ||
176 | SCTP_IERROR_IGNORE_TSN, | ||
177 | SCTP_IERROR_NO_DATA, | ||
178 | SCTP_IERROR_BAD_STREAM, | ||
179 | SCTP_IERROR_BAD_PORTS, | ||
180 | |||
181 | } sctp_ierror_t; | ||
182 | |||
183 | |||
184 | |||
185 | /* SCTP state defines for internal state machine */ | ||
186 | typedef enum { | ||
187 | |||
188 | SCTP_STATE_EMPTY = 0, | ||
189 | SCTP_STATE_CLOSED = 1, | ||
190 | SCTP_STATE_COOKIE_WAIT = 2, | ||
191 | SCTP_STATE_COOKIE_ECHOED = 3, | ||
192 | SCTP_STATE_ESTABLISHED = 4, | ||
193 | SCTP_STATE_SHUTDOWN_PENDING = 5, | ||
194 | SCTP_STATE_SHUTDOWN_SENT = 6, | ||
195 | SCTP_STATE_SHUTDOWN_RECEIVED = 7, | ||
196 | SCTP_STATE_SHUTDOWN_ACK_SENT = 8, | ||
197 | |||
198 | } sctp_state_t; | ||
199 | |||
200 | #define SCTP_STATE_MAX SCTP_STATE_SHUTDOWN_ACK_SENT | ||
201 | #define SCTP_STATE_NUM_STATES (SCTP_STATE_MAX + 1) | ||
202 | |||
203 | /* These are values for sk->state. | ||
204 | * For a UDP-style SCTP socket, the states are defined as follows | ||
205 | * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to | ||
206 | * accept new associations, but it can initiate the creation of new ones. | ||
207 | * - A socket in SCTP_SS_LISTENING state indicates that it is willing to | ||
208 | * accept new associations and can initiate the creation of new ones. | ||
209 | * - A socket in SCTP_SS_ESTABLISHED state indicates that it is a peeled off | ||
210 | * socket with one association. | ||
211 | * For a TCP-style SCTP socket, the states are defined as follows | ||
212 | * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to | ||
213 | * accept new associations, but it can initiate the creation of new ones. | ||
214 | * - A socket in SCTP_SS_LISTENING state indicates that it is willing to | ||
215 | * accept new associations, but cannot initiate the creation of new ones. | ||
216 | * - A socket in SCTP_SS_ESTABLISHED state indicates that it has a single | ||
217 | * association. | ||
218 | */ | ||
219 | typedef enum { | ||
220 | SCTP_SS_CLOSED = TCP_CLOSE, | ||
221 | SCTP_SS_LISTENING = TCP_LISTEN, | ||
222 | SCTP_SS_ESTABLISHING = TCP_SYN_SENT, | ||
223 | SCTP_SS_ESTABLISHED = TCP_ESTABLISHED, | ||
224 | SCTP_SS_DISCONNECTING = TCP_CLOSING, | ||
225 | } sctp_sock_state_t; | ||
226 | |||
227 | /* These functions map various type to printable names. */ | ||
228 | const char *sctp_cname(const sctp_subtype_t); /* chunk types */ | ||
229 | const char *sctp_oname(const sctp_subtype_t); /* other events */ | ||
230 | const char *sctp_tname(const sctp_subtype_t); /* timeouts */ | ||
231 | const char *sctp_pname(const sctp_subtype_t); /* primitives */ | ||
232 | |||
233 | /* This is a table of printable names of sctp_state_t's. */ | ||
234 | extern const char *sctp_state_tbl[], *sctp_evttype_tbl[], *sctp_status_tbl[]; | ||
235 | |||
236 | /* Maximum chunk length considering padding requirements. */ | ||
237 | enum { SCTP_MAX_CHUNK_LEN = ((1<<16) - sizeof(__u32)) }; | ||
238 | |||
239 | /* Encourage Cookie-Echo bundling by pre-fragmenting chunks a little | ||
240 | * harder (until reaching ESTABLISHED state). | ||
241 | */ | ||
242 | enum { SCTP_ARBITRARY_COOKIE_ECHO_LEN = 200 }; | ||
243 | |||
244 | /* Guess at how big to make the TSN mapping array. | ||
245 | * We guarantee that we can handle at least this big a gap between the | ||
246 | * cumulative ACK and the highest TSN. In practice, we can often | ||
247 | * handle up to twice this value. | ||
248 | * | ||
249 | * NEVER make this more than 32767 (2^15-1). The Gap Ack Blocks in a | ||
250 | * SACK (see section 3.3.4) are only 16 bits, so 2*SCTP_TSN_MAP_SIZE | ||
251 | * must be less than 65535 (2^16 - 1), or we will have overflow | ||
252 | * problems creating SACK's. | ||
253 | */ | ||
254 | #define SCTP_TSN_MAP_SIZE 2048 | ||
255 | #define SCTP_TSN_MAX_GAP 65535 | ||
256 | |||
257 | /* We will not record more than this many duplicate TSNs between two | ||
258 | * SACKs. The minimum PMTU is 576. Remove all the headers and there | ||
259 | * is enough room for 131 duplicate reports. Round down to the | ||
260 | * nearest power of 2. | ||
261 | */ | ||
262 | enum { SCTP_MIN_PMTU = 576 }; | ||
263 | enum { SCTP_MAX_DUP_TSNS = 16 }; | ||
264 | enum { SCTP_MAX_GABS = 16 }; | ||
265 | |||
266 | typedef enum { | ||
267 | SCTP_COUNTER_INIT_ERROR, | ||
268 | } sctp_counter_t; | ||
269 | |||
270 | /* How many counters does an association need? */ | ||
271 | #define SCTP_NUMBER_COUNTERS 5 | ||
272 | |||
273 | /* Here we define the default timers. */ | ||
274 | |||
275 | /* cookie timer def = ? seconds */ | ||
276 | #define SCTP_DEFAULT_TIMEOUT_T1_COOKIE (3 * HZ) | ||
277 | |||
278 | /* init timer def = 3 seconds */ | ||
279 | #define SCTP_DEFAULT_TIMEOUT_T1_INIT (3 * HZ) | ||
280 | |||
281 | /* shutdown timer def = 300 ms */ | ||
282 | #define SCTP_DEFAULT_TIMEOUT_T2_SHUTDOWN ((300 * HZ) / 1000) | ||
283 | |||
284 | /* 0 seconds + RTO */ | ||
285 | #define SCTP_DEFAULT_TIMEOUT_HEARTBEAT (10 * HZ) | ||
286 | |||
287 | /* recv timer def = 200ms (in usec) */ | ||
288 | #define SCTP_DEFAULT_TIMEOUT_SACK ((200 * HZ) / 1000) | ||
289 | #define SCTP_DEFAULT_TIMEOUT_SACK_MAX ((500 * HZ) / 1000) /* 500 ms */ | ||
290 | |||
291 | /* RTO.Initial - 3 seconds | ||
292 | * RTO.Min - 1 second | ||
293 | * RTO.Max - 60 seconds | ||
294 | * RTO.Alpha - 1/8 | ||
295 | * RTO.Beta - 1/4 | ||
296 | */ | ||
297 | #define SCTP_RTO_INITIAL (3 * HZ) | ||
298 | #define SCTP_RTO_MIN (1 * HZ) | ||
299 | #define SCTP_RTO_MAX (60 * HZ) | ||
300 | |||
301 | #define SCTP_RTO_ALPHA 3 /* 1/8 when converted to right shifts. */ | ||
302 | #define SCTP_RTO_BETA 2 /* 1/4 when converted to right shifts. */ | ||
303 | |||
304 | /* Maximum number of new data packets that can be sent in a burst. */ | ||
305 | #define SCTP_MAX_BURST 4 | ||
306 | |||
307 | #define SCTP_CLOCK_GRANULARITY 1 /* 1 jiffy */ | ||
308 | |||
309 | #define SCTP_DEF_MAX_INIT 6 | ||
310 | #define SCTP_DEF_MAX_SEND 10 | ||
311 | |||
312 | #define SCTP_DEFAULT_COOKIE_LIFE_SEC 60 /* seconds */ | ||
313 | #define SCTP_DEFAULT_COOKIE_LIFE_USEC 0 /* microseconds */ | ||
314 | |||
315 | #define SCTP_DEFAULT_MINWINDOW 1500 /* default minimum rwnd size */ | ||
316 | #define SCTP_DEFAULT_MAXWINDOW 65535 /* default rwnd size */ | ||
317 | #define SCTP_DEFAULT_MAXSEGMENT 1500 /* MTU size, this is the limit | ||
318 | * to which we will raise the P-MTU. | ||
319 | */ | ||
320 | #define SCTP_DEFAULT_MINSEGMENT 512 /* MTU size ... if no mtu disc */ | ||
321 | #define SCTP_HOW_MANY_SECRETS 2 /* How many secrets I keep */ | ||
322 | #define SCTP_HOW_LONG_COOKIE_LIVE 3600 /* How many seconds the current | ||
323 | * secret will live? | ||
324 | */ | ||
325 | #define SCTP_SECRET_SIZE 32 /* Number of octets in a 256 bits. */ | ||
326 | |||
327 | #define SCTP_SIGNATURE_SIZE 20 /* size of a SLA-1 signature */ | ||
328 | |||
329 | #define SCTP_COOKIE_MULTIPLE 32 /* Pad out our cookie to make our hash | ||
330 | * functions simpler to write. | ||
331 | */ | ||
332 | |||
333 | #if defined (CONFIG_SCTP_HMAC_MD5) | ||
334 | #define SCTP_COOKIE_HMAC_ALG "md5" | ||
335 | #elif defined (CONFIG_SCTP_HMAC_SHA1) | ||
336 | #define SCTP_COOKIE_HMAC_ALG "sha1" | ||
337 | #else | ||
338 | #define SCTP_COOKIE_HMAC_ALG NULL | ||
339 | #endif | ||
340 | |||
341 | /* These return values describe the success or failure of a number of | ||
342 | * routines which form the lower interface to SCTP_outqueue. | ||
343 | */ | ||
344 | typedef enum { | ||
345 | SCTP_XMIT_OK, | ||
346 | SCTP_XMIT_PMTU_FULL, | ||
347 | SCTP_XMIT_RWND_FULL, | ||
348 | SCTP_XMIT_NAGLE_DELAY, | ||
349 | } sctp_xmit_t; | ||
350 | |||
351 | /* These are the commands for manipulating transports. */ | ||
352 | typedef enum { | ||
353 | SCTP_TRANSPORT_UP, | ||
354 | SCTP_TRANSPORT_DOWN, | ||
355 | } sctp_transport_cmd_t; | ||
356 | |||
357 | /* These are the address scopes defined mainly for IPv4 addresses | ||
358 | * based on draft of SCTP IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>. | ||
359 | * These scopes are hopefully generic enough to be used on scoping both | ||
360 | * IPv4 and IPv6 addresses in SCTP. | ||
361 | * At this point, the IPv6 scopes will be mapped to these internal scopes | ||
362 | * as much as possible. | ||
363 | */ | ||
364 | typedef enum { | ||
365 | SCTP_SCOPE_GLOBAL, /* IPv4 global addresses */ | ||
366 | SCTP_SCOPE_PRIVATE, /* IPv4 private addresses */ | ||
367 | SCTP_SCOPE_LINK, /* IPv4 link local address */ | ||
368 | SCTP_SCOPE_LOOPBACK, /* IPv4 loopback address */ | ||
369 | SCTP_SCOPE_UNUSABLE, /* IPv4 unusable addresses */ | ||
370 | } sctp_scope_t; | ||
371 | |||
372 | /* Based on IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>, | ||
373 | * SCTP IPv4 unusable addresses: 0.0.0.0/8, 224.0.0.0/4, 198.18.0.0/24, | ||
374 | * 192.88.99.0/24. | ||
375 | * Also, RFC 8.4, non-unicast addresses are not considered valid SCTP | ||
376 | * addresses. | ||
377 | */ | ||
378 | #define IS_IPV4_UNUSABLE_ADDRESS(a) \ | ||
379 | ((INADDR_BROADCAST == *a) || \ | ||
380 | (MULTICAST(*a)) || \ | ||
381 | (((unsigned char *)(a))[0] == 0) || \ | ||
382 | ((((unsigned char *)(a))[0] == 198) && \ | ||
383 | (((unsigned char *)(a))[1] == 18) && \ | ||
384 | (((unsigned char *)(a))[2] == 0)) || \ | ||
385 | ((((unsigned char *)(a))[0] == 192) && \ | ||
386 | (((unsigned char *)(a))[1] == 88) && \ | ||
387 | (((unsigned char *)(a))[2] == 99))) | ||
388 | |||
389 | /* IPv4 Link-local addresses: 169.254.0.0/16. */ | ||
390 | #define IS_IPV4_LINK_ADDRESS(a) \ | ||
391 | ((((unsigned char *)(a))[0] == 169) && \ | ||
392 | (((unsigned char *)(a))[1] == 254)) | ||
393 | |||
394 | /* RFC 1918 "Address Allocation for Private Internets" defines the IPv4 | ||
395 | * private address space as the following: | ||
396 | * | ||
397 | * 10.0.0.0 - 10.255.255.255 (10/8 prefix) | ||
398 | * 172.16.0.0.0 - 172.31.255.255 (172.16/12 prefix) | ||
399 | * 192.168.0.0 - 192.168.255.255 (192.168/16 prefix) | ||
400 | */ | ||
401 | #define IS_IPV4_PRIVATE_ADDRESS(a) \ | ||
402 | ((((unsigned char *)(a))[0] == 10) || \ | ||
403 | ((((unsigned char *)(a))[0] == 172) && \ | ||
404 | (((unsigned char *)(a))[1] >= 16) && \ | ||
405 | (((unsigned char *)(a))[1] < 32)) || \ | ||
406 | ((((unsigned char *)(a))[0] == 192) && \ | ||
407 | (((unsigned char *)(a))[1] == 168))) | ||
408 | |||
409 | /* Flags used for the bind address copy functions. */ | ||
410 | #define SCTP_ADDR6_ALLOWED 0x00000001 /* IPv6 address is allowed by | ||
411 | local sock family */ | ||
412 | #define SCTP_ADDR4_PEERSUPP 0x00000002 /* IPv4 address is supported by | ||
413 | peer */ | ||
414 | #define SCTP_ADDR6_PEERSUPP 0x00000004 /* IPv6 address is supported by | ||
415 | peer */ | ||
416 | |||
417 | /* Reasons to retransmit. */ | ||
418 | typedef enum { | ||
419 | SCTP_RTXR_T3_RTX, | ||
420 | SCTP_RTXR_FAST_RTX, | ||
421 | SCTP_RTXR_PMTUD, | ||
422 | } sctp_retransmit_reason_t; | ||
423 | |||
424 | /* Reasons to lower cwnd. */ | ||
425 | typedef enum { | ||
426 | SCTP_LOWER_CWND_T3_RTX, | ||
427 | SCTP_LOWER_CWND_FAST_RTX, | ||
428 | SCTP_LOWER_CWND_ECNE, | ||
429 | SCTP_LOWER_CWND_INACTIVE, | ||
430 | } sctp_lower_cwnd_t; | ||
431 | |||
432 | #endif /* __sctp_constants_h__ */ | ||