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47#ifndef __sctp_constants_h__
48#define __sctp_constants_h__
49
50#include <linux/sctp.h>
51#include <linux/ipv6.h>
52#include <net/sctp/user.h>
53#include <net/tcp_states.h>
54
55
56enum { SCTP_MAX_STREAM = 0xffff };
57enum { SCTP_DEFAULT_OUTSTREAMS = 10 };
58enum { SCTP_DEFAULT_INSTREAMS = SCTP_MAX_STREAM };
59
60
61
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
68#define SCTP_NUM_ADDIP_CHUNK_TYPES 2
69
70#define SCTP_NUM_PRSCTP_CHUNK_TYPES 1
71
72#define SCTP_NUM_AUTH_CHUNK_TYPES 1
73
74#define SCTP_NUM_CHUNK_TYPES (SCTP_NUM_BASE_CHUNK_TYPES + \
75 SCTP_NUM_ADDIP_CHUNK_TYPES +\
76 SCTP_NUM_PRSCTP_CHUNK_TYPES +\
77 SCTP_NUM_AUTH_CHUNK_TYPES)
78
79
80typedef enum {
81
82 SCTP_EVENT_T_CHUNK = 1,
83 SCTP_EVENT_T_TIMEOUT,
84 SCTP_EVENT_T_OTHER,
85 SCTP_EVENT_T_PRIMITIVE
86
87} sctp_event_t;
88
89#define SCTP_EVENT_T_MAX SCTP_EVENT_T_PRIMITIVE
90#define SCTP_EVENT_T_NUM (SCTP_EVENT_T_MAX + 1)
91
92
93
94
95
96typedef enum {
97 SCTP_EVENT_TIMEOUT_NONE = 0,
98 SCTP_EVENT_TIMEOUT_T1_COOKIE,
99 SCTP_EVENT_TIMEOUT_T1_INIT,
100 SCTP_EVENT_TIMEOUT_T2_SHUTDOWN,
101 SCTP_EVENT_TIMEOUT_T3_RTX,
102 SCTP_EVENT_TIMEOUT_T4_RTO,
103 SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD,
104 SCTP_EVENT_TIMEOUT_HEARTBEAT,
105 SCTP_EVENT_TIMEOUT_SACK,
106 SCTP_EVENT_TIMEOUT_AUTOCLOSE,
107} sctp_event_timeout_t;
108
109#define SCTP_EVENT_TIMEOUT_MAX SCTP_EVENT_TIMEOUT_AUTOCLOSE
110#define SCTP_NUM_TIMEOUT_TYPES (SCTP_EVENT_TIMEOUT_MAX + 1)
111
112typedef enum {
113 SCTP_EVENT_NO_PENDING_TSN = 0,
114 SCTP_EVENT_ICMP_PROTO_UNREACH,
115} sctp_event_other_t;
116
117#define SCTP_EVENT_OTHER_MAX SCTP_EVENT_ICMP_PROTO_UNREACH
118#define SCTP_NUM_OTHER_TYPES (SCTP_EVENT_OTHER_MAX + 1)
119
120
121typedef enum {
122 SCTP_PRIMITIVE_ASSOCIATE = 0,
123 SCTP_PRIMITIVE_SHUTDOWN,
124 SCTP_PRIMITIVE_ABORT,
125 SCTP_PRIMITIVE_SEND,
126 SCTP_PRIMITIVE_REQUESTHEARTBEAT,
127 SCTP_PRIMITIVE_ASCONF,
128} sctp_event_primitive_t;
129
130#define SCTP_EVENT_PRIMITIVE_MAX SCTP_PRIMITIVE_ASCONF
131#define SCTP_NUM_PRIMITIVE_TYPES (SCTP_EVENT_PRIMITIVE_MAX + 1)
132
133
134
135
136
137
138
139typedef union {
140 sctp_cid_t chunk;
141 sctp_event_timeout_t timeout;
142 sctp_event_other_t other;
143 sctp_event_primitive_t primitive;
144} sctp_subtype_t;
145
146#define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \
147static inline sctp_subtype_t \
148SCTP_ST_## _name (_type _arg) \
149{ sctp_subtype_t _retval; _retval._elt = _arg; return _retval; }
150
151SCTP_SUBTYPE_CONSTRUCTOR(CHUNK, sctp_cid_t, chunk)
152SCTP_SUBTYPE_CONSTRUCTOR(TIMEOUT, sctp_event_timeout_t, timeout)
153SCTP_SUBTYPE_CONSTRUCTOR(OTHER, sctp_event_other_t, other)
154SCTP_SUBTYPE_CONSTRUCTOR(PRIMITIVE, sctp_event_primitive_t, primitive)
155
156
157#define sctp_chunk_is_control(a) (a->chunk_hdr->type != SCTP_CID_DATA)
158#define sctp_chunk_is_data(a) (a->chunk_hdr->type == SCTP_CID_DATA)
159
160
161#define SCTP_DATA_SNDSIZE(c) ((int)((unsigned long)(c->chunk_end)\
162 - (unsigned long)(c->chunk_hdr)\
163 - sizeof(sctp_data_chunk_t)))
164
165#define SCTP_MAX_ERROR_CAUSE SCTP_ERROR_NONEXIST_IP
166#define SCTP_NUM_ERROR_CAUSE 10
167
168
169typedef enum {
170
171 SCTP_IERROR_NO_ERROR = 0,
172 SCTP_IERROR_BASE = 1000,
173 SCTP_IERROR_NO_COOKIE,
174 SCTP_IERROR_BAD_SIG,
175 SCTP_IERROR_STALE_COOKIE,
176 SCTP_IERROR_NOMEM,
177 SCTP_IERROR_MALFORMED,
178 SCTP_IERROR_BAD_TAG,
179 SCTP_IERROR_BIG_GAP,
180 SCTP_IERROR_DUP_TSN,
181 SCTP_IERROR_HIGH_TSN,
182 SCTP_IERROR_IGNORE_TSN,
183 SCTP_IERROR_NO_DATA,
184 SCTP_IERROR_BAD_STREAM,
185 SCTP_IERROR_BAD_PORTS,
186 SCTP_IERROR_AUTH_BAD_HMAC,
187 SCTP_IERROR_AUTH_BAD_KEYID,
188 SCTP_IERROR_PROTO_VIOLATION,
189 SCTP_IERROR_ERROR,
190 SCTP_IERROR_ABORT,
191} sctp_ierror_t;
192
193
194
195
196typedef enum {
197
198 SCTP_STATE_EMPTY = 0,
199 SCTP_STATE_CLOSED = 1,
200 SCTP_STATE_COOKIE_WAIT = 2,
201 SCTP_STATE_COOKIE_ECHOED = 3,
202 SCTP_STATE_ESTABLISHED = 4,
203 SCTP_STATE_SHUTDOWN_PENDING = 5,
204 SCTP_STATE_SHUTDOWN_SENT = 6,
205 SCTP_STATE_SHUTDOWN_RECEIVED = 7,
206 SCTP_STATE_SHUTDOWN_ACK_SENT = 8,
207
208} sctp_state_t;
209
210#define SCTP_STATE_MAX SCTP_STATE_SHUTDOWN_ACK_SENT
211#define SCTP_STATE_NUM_STATES (SCTP_STATE_MAX + 1)
212
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227
228
229typedef enum {
230 SCTP_SS_CLOSED = TCP_CLOSE,
231 SCTP_SS_LISTENING = TCP_LISTEN,
232 SCTP_SS_ESTABLISHING = TCP_SYN_SENT,
233 SCTP_SS_ESTABLISHED = TCP_ESTABLISHED,
234 SCTP_SS_CLOSING = TCP_CLOSING,
235} sctp_sock_state_t;
236
237
238const char *sctp_cname(const sctp_subtype_t);
239const char *sctp_oname(const sctp_subtype_t);
240const char *sctp_tname(const sctp_subtype_t);
241const char *sctp_pname(const sctp_subtype_t);
242
243
244extern const char *const sctp_state_tbl[];
245extern const char *const sctp_evttype_tbl[];
246extern const char *const sctp_status_tbl[];
247
248
249enum { SCTP_MAX_CHUNK_LEN = ((1<<16) - sizeof(__u32)) };
250
251
252
253
254enum { SCTP_ARBITRARY_COOKIE_ECHO_LEN = 200 };
255
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264
265
266#define SCTP_TSN_MAP_INITIAL BITS_PER_LONG
267#define SCTP_TSN_MAP_INCREMENT SCTP_TSN_MAP_INITIAL
268#define SCTP_TSN_MAP_SIZE 4096
269#define SCTP_TSN_MAX_GAP 65535
270
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273
274
275
276enum { SCTP_MIN_PMTU = 576 };
277enum { SCTP_MAX_DUP_TSNS = 16 };
278enum { SCTP_MAX_GABS = 16 };
279
280
281#define SCTP_DEFAULT_TIMEOUT_HEARTBEAT (30*1000)
282
283
284#define SCTP_DEFAULT_TIMEOUT_SACK (200)
285
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290
291
292#define SCTP_RTO_INITIAL (3 * 1000)
293#define SCTP_RTO_MIN (1 * 1000)
294#define SCTP_RTO_MAX (60 * 1000)
295
296#define SCTP_RTO_ALPHA 3
297#define SCTP_RTO_BETA 2
298
299
300#define SCTP_DEFAULT_MAX_BURST 4
301
302#define SCTP_CLOCK_GRANULARITY 1
303
304#define SCTP_DEF_MAX_INIT 6
305#define SCTP_DEF_MAX_SEND 10
306
307#define SCTP_DEFAULT_COOKIE_LIFE (60 * 1000)
308
309#define SCTP_DEFAULT_MINWINDOW 1500
310#define SCTP_DEFAULT_MAXWINDOW 65535
311#define SCTP_DEFAULT_MAXSEGMENT 1500
312
313
314#define SCTP_DEFAULT_MINSEGMENT 512
315#define SCTP_HOW_MANY_SECRETS 2
316#define SCTP_HOW_LONG_COOKIE_LIVE 3600
317
318
319#define SCTP_SECRET_SIZE 32
320
321#define SCTP_SIGNATURE_SIZE 20
322
323#define SCTP_COOKIE_MULTIPLE 32
324
325
326
327#if defined (CONFIG_SCTP_HMAC_MD5)
328#define SCTP_COOKIE_HMAC_ALG "hmac(md5)"
329#elif defined (CONFIG_SCTP_HMAC_SHA1)
330#define SCTP_COOKIE_HMAC_ALG "hmac(sha1)"
331#else
332#define SCTP_COOKIE_HMAC_ALG NULL
333#endif
334
335
336
337
338typedef enum {
339 SCTP_XMIT_OK,
340 SCTP_XMIT_PMTU_FULL,
341 SCTP_XMIT_RWND_FULL,
342 SCTP_XMIT_NAGLE_DELAY,
343} sctp_xmit_t;
344
345
346typedef enum {
347 SCTP_TRANSPORT_UP,
348 SCTP_TRANSPORT_DOWN,
349} sctp_transport_cmd_t;
350
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356
357
358typedef enum {
359 SCTP_SCOPE_GLOBAL,
360 SCTP_SCOPE_PRIVATE,
361 SCTP_SCOPE_LINK,
362 SCTP_SCOPE_LOOPBACK,
363 SCTP_SCOPE_UNUSABLE,
364} sctp_scope_t;
365
366typedef enum {
367 SCTP_SCOPE_POLICY_DISABLE,
368 SCTP_SCOPE_POLICY_ENABLE,
369 SCTP_SCOPE_POLICY_PRIVATE,
370 SCTP_SCOPE_POLICY_LINK,
371} sctp_scope_policy_t;
372
373
374
375
376
377
378
379#define IS_IPV4_UNUSABLE_ADDRESS(a) \
380 ((htonl(INADDR_BROADCAST) == a) || \
381 ipv4_is_multicast(a) || \
382 ipv4_is_zeronet(a) || \
383 ipv4_is_test_198(a) || \
384 ipv4_is_anycast_6to4(a))
385
386
387#define SCTP_ADDR6_ALLOWED 0x00000001
388
389#define SCTP_ADDR4_PEERSUPP 0x00000002
390
391#define SCTP_ADDR6_PEERSUPP 0x00000004
392
393
394
395typedef enum {
396 SCTP_RTXR_T3_RTX,
397 SCTP_RTXR_FAST_RTX,
398 SCTP_RTXR_PMTUD,
399 SCTP_RTXR_T1_RTX,
400} sctp_retransmit_reason_t;
401
402
403typedef enum {
404 SCTP_LOWER_CWND_T3_RTX,
405 SCTP_LOWER_CWND_FAST_RTX,
406 SCTP_LOWER_CWND_ECNE,
407 SCTP_LOWER_CWND_INACTIVE,
408} sctp_lower_cwnd_t;
409
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425
426
427enum {
428 SCTP_AUTH_HMAC_ID_RESERVED_0,
429 SCTP_AUTH_HMAC_ID_SHA1,
430 SCTP_AUTH_HMAC_ID_RESERVED_2,
431#if defined (CONFIG_CRYPTO_SHA256) || defined (CONFIG_CRYPTO_SHA256_MODULE)
432 SCTP_AUTH_HMAC_ID_SHA256,
433#endif
434 __SCTP_AUTH_HMAC_MAX
435};
436
437#define SCTP_AUTH_HMAC_ID_MAX __SCTP_AUTH_HMAC_MAX - 1
438#define SCTP_AUTH_NUM_HMACS __SCTP_AUTH_HMAC_MAX
439#define SCTP_SHA1_SIG_SIZE 20
440#define SCTP_SHA256_SIG_SIZE 32
441
442
443
444
445
446#define SCTP_NUM_NOAUTH_CHUNKS 4
447#define SCTP_AUTH_MAX_CHUNKS (SCTP_NUM_CHUNK_TYPES - SCTP_NUM_NOAUTH_CHUNKS)
448
449
450
451
452#define SCTP_AUTH_RANDOM_LENGTH 32
453
454#endif
455