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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
65#define SCTP_NUM_BASE_CHUNK_TYPES (SCTP_CID_BASE_MAX + 1)
66
67#define SCTP_NUM_ADDIP_CHUNK_TYPES 2
68
69#define SCTP_NUM_PRSCTP_CHUNK_TYPES 1
70
71#define SCTP_NUM_AUTH_CHUNK_TYPES 1
72
73#define SCTP_NUM_CHUNK_TYPES (SCTP_NUM_BASE_CHUNK_TYPES + \
74 SCTP_NUM_ADDIP_CHUNK_TYPES +\
75 SCTP_NUM_PRSCTP_CHUNK_TYPES +\
76 SCTP_NUM_AUTH_CHUNK_TYPES)
77
78
79typedef enum {
80
81 SCTP_EVENT_T_CHUNK = 1,
82 SCTP_EVENT_T_TIMEOUT,
83 SCTP_EVENT_T_OTHER,
84 SCTP_EVENT_T_PRIMITIVE
85
86} sctp_event_t;
87
88
89
90
91
92typedef enum {
93 SCTP_EVENT_TIMEOUT_NONE = 0,
94 SCTP_EVENT_TIMEOUT_T1_COOKIE,
95 SCTP_EVENT_TIMEOUT_T1_INIT,
96 SCTP_EVENT_TIMEOUT_T2_SHUTDOWN,
97 SCTP_EVENT_TIMEOUT_T3_RTX,
98 SCTP_EVENT_TIMEOUT_T4_RTO,
99 SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD,
100 SCTP_EVENT_TIMEOUT_HEARTBEAT,
101 SCTP_EVENT_TIMEOUT_SACK,
102 SCTP_EVENT_TIMEOUT_AUTOCLOSE,
103} sctp_event_timeout_t;
104
105#define SCTP_EVENT_TIMEOUT_MAX SCTP_EVENT_TIMEOUT_AUTOCLOSE
106#define SCTP_NUM_TIMEOUT_TYPES (SCTP_EVENT_TIMEOUT_MAX + 1)
107
108typedef enum {
109 SCTP_EVENT_NO_PENDING_TSN = 0,
110 SCTP_EVENT_ICMP_PROTO_UNREACH,
111} sctp_event_other_t;
112
113#define SCTP_EVENT_OTHER_MAX SCTP_EVENT_ICMP_PROTO_UNREACH
114#define SCTP_NUM_OTHER_TYPES (SCTP_EVENT_OTHER_MAX + 1)
115
116
117typedef enum {
118 SCTP_PRIMITIVE_ASSOCIATE = 0,
119 SCTP_PRIMITIVE_SHUTDOWN,
120 SCTP_PRIMITIVE_ABORT,
121 SCTP_PRIMITIVE_SEND,
122 SCTP_PRIMITIVE_REQUESTHEARTBEAT,
123 SCTP_PRIMITIVE_ASCONF,
124} sctp_event_primitive_t;
125
126#define SCTP_EVENT_PRIMITIVE_MAX SCTP_PRIMITIVE_ASCONF
127#define SCTP_NUM_PRIMITIVE_TYPES (SCTP_EVENT_PRIMITIVE_MAX + 1)
128
129
130
131
132
133
134
135typedef union {
136 sctp_cid_t chunk;
137 sctp_event_timeout_t timeout;
138 sctp_event_other_t other;
139 sctp_event_primitive_t primitive;
140} sctp_subtype_t;
141
142#define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \
143static inline sctp_subtype_t \
144SCTP_ST_## _name (_type _arg) \
145{ sctp_subtype_t _retval; _retval._elt = _arg; return _retval; }
146
147SCTP_SUBTYPE_CONSTRUCTOR(CHUNK, sctp_cid_t, chunk)
148SCTP_SUBTYPE_CONSTRUCTOR(TIMEOUT, sctp_event_timeout_t, timeout)
149SCTP_SUBTYPE_CONSTRUCTOR(OTHER, sctp_event_other_t, other)
150SCTP_SUBTYPE_CONSTRUCTOR(PRIMITIVE, sctp_event_primitive_t, primitive)
151
152
153#define sctp_chunk_is_data(a) (a->chunk_hdr->type == SCTP_CID_DATA)
154
155
156#define SCTP_DATA_SNDSIZE(c) ((int)((unsigned long)(c->chunk_end)\
157 - (unsigned long)(c->chunk_hdr)\
158 - sizeof(sctp_data_chunk_t)))
159
160
161typedef enum {
162
163 SCTP_IERROR_NO_ERROR = 0,
164 SCTP_IERROR_BASE = 1000,
165 SCTP_IERROR_NO_COOKIE,
166 SCTP_IERROR_BAD_SIG,
167 SCTP_IERROR_STALE_COOKIE,
168 SCTP_IERROR_NOMEM,
169 SCTP_IERROR_MALFORMED,
170 SCTP_IERROR_BAD_TAG,
171 SCTP_IERROR_BIG_GAP,
172 SCTP_IERROR_DUP_TSN,
173 SCTP_IERROR_HIGH_TSN,
174 SCTP_IERROR_IGNORE_TSN,
175 SCTP_IERROR_NO_DATA,
176 SCTP_IERROR_BAD_STREAM,
177 SCTP_IERROR_BAD_PORTS,
178 SCTP_IERROR_AUTH_BAD_HMAC,
179 SCTP_IERROR_AUTH_BAD_KEYID,
180 SCTP_IERROR_PROTO_VIOLATION,
181 SCTP_IERROR_ERROR,
182 SCTP_IERROR_ABORT,
183} sctp_ierror_t;
184
185
186
187
188typedef enum {
189
190 SCTP_STATE_CLOSED = 0,
191 SCTP_STATE_COOKIE_WAIT = 1,
192 SCTP_STATE_COOKIE_ECHOED = 2,
193 SCTP_STATE_ESTABLISHED = 3,
194 SCTP_STATE_SHUTDOWN_PENDING = 4,
195 SCTP_STATE_SHUTDOWN_SENT = 5,
196 SCTP_STATE_SHUTDOWN_RECEIVED = 6,
197 SCTP_STATE_SHUTDOWN_ACK_SENT = 7,
198
199} sctp_state_t;
200
201#define SCTP_STATE_MAX SCTP_STATE_SHUTDOWN_ACK_SENT
202#define SCTP_STATE_NUM_STATES (SCTP_STATE_MAX + 1)
203
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219
220typedef enum {
221 SCTP_SS_CLOSED = TCP_CLOSE,
222 SCTP_SS_LISTENING = TCP_LISTEN,
223 SCTP_SS_ESTABLISHING = TCP_SYN_SENT,
224 SCTP_SS_ESTABLISHED = TCP_ESTABLISHED,
225 SCTP_SS_CLOSING = TCP_CLOSING,
226} sctp_sock_state_t;
227
228
229const char *sctp_cname(const sctp_subtype_t);
230const char *sctp_oname(const sctp_subtype_t);
231const char *sctp_tname(const sctp_subtype_t);
232const char *sctp_pname(const sctp_subtype_t);
233
234
235extern const char *const sctp_state_tbl[];
236extern const char *const sctp_evttype_tbl[];
237extern const char *const sctp_status_tbl[];
238
239
240enum { SCTP_MAX_CHUNK_LEN = ((1<<16) - sizeof(__u32)) };
241
242
243
244
245enum { SCTP_ARBITRARY_COOKIE_ECHO_LEN = 200 };
246
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256
257#define SCTP_TSN_MAP_INITIAL BITS_PER_LONG
258#define SCTP_TSN_MAP_INCREMENT SCTP_TSN_MAP_INITIAL
259#define SCTP_TSN_MAP_SIZE 4096
260
261
262
263
264
265
266enum { SCTP_MIN_PMTU = 576 };
267enum { SCTP_MAX_DUP_TSNS = 16 };
268enum { SCTP_MAX_GABS = 16 };
269
270
271#define SCTP_DEFAULT_TIMEOUT_HEARTBEAT (30*1000)
272
273
274#define SCTP_DEFAULT_TIMEOUT_SACK (200)
275
276
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279
280
281
282#define SCTP_RTO_INITIAL (3 * 1000)
283#define SCTP_RTO_MIN (1 * 1000)
284#define SCTP_RTO_MAX (60 * 1000)
285
286#define SCTP_RTO_ALPHA 3
287#define SCTP_RTO_BETA 2
288
289
290#define SCTP_DEFAULT_MAX_BURST 4
291
292#define SCTP_CLOCK_GRANULARITY 1
293
294#define SCTP_DEFAULT_COOKIE_LIFE (60 * 1000)
295
296#define SCTP_DEFAULT_MINWINDOW 1500
297#define SCTP_DEFAULT_MAXWINDOW 65535
298#define SCTP_DEFAULT_RWND_SHIFT 4
299
300
301
302#define SCTP_DEFAULT_MAXSEGMENT 1500
303
304
305#define SCTP_DEFAULT_MINSEGMENT 512
306#define SCTP_HOW_MANY_SECRETS 2
307#define SCTP_SECRET_SIZE 32
308
309#define SCTP_SIGNATURE_SIZE 20
310
311#define SCTP_COOKIE_MULTIPLE 32
312
313
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316
317
318typedef enum {
319 SCTP_XMIT_OK,
320 SCTP_XMIT_PMTU_FULL,
321 SCTP_XMIT_RWND_FULL,
322 SCTP_XMIT_NAGLE_DELAY,
323} sctp_xmit_t;
324
325
326typedef enum {
327 SCTP_TRANSPORT_UP,
328 SCTP_TRANSPORT_DOWN,
329 SCTP_TRANSPORT_PF,
330} sctp_transport_cmd_t;
331
332
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336
337
338
339typedef enum {
340 SCTP_SCOPE_GLOBAL,
341 SCTP_SCOPE_PRIVATE,
342 SCTP_SCOPE_LINK,
343 SCTP_SCOPE_LOOPBACK,
344 SCTP_SCOPE_UNUSABLE,
345} sctp_scope_t;
346
347typedef enum {
348 SCTP_SCOPE_POLICY_DISABLE,
349 SCTP_SCOPE_POLICY_ENABLE,
350 SCTP_SCOPE_POLICY_PRIVATE,
351 SCTP_SCOPE_POLICY_LINK,
352} sctp_scope_policy_t;
353
354
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357
358
359
360#define IS_IPV4_UNUSABLE_ADDRESS(a) \
361 ((htonl(INADDR_BROADCAST) == a) || \
362 ipv4_is_multicast(a) || \
363 ipv4_is_zeronet(a) || \
364 ipv4_is_test_198(a) || \
365 ipv4_is_anycast_6to4(a))
366
367
368#define SCTP_ADDR6_ALLOWED 0x00000001
369
370#define SCTP_ADDR4_PEERSUPP 0x00000002
371
372#define SCTP_ADDR6_PEERSUPP 0x00000004
373
374
375
376typedef enum {
377 SCTP_RTXR_T3_RTX,
378 SCTP_RTXR_FAST_RTX,
379 SCTP_RTXR_PMTUD,
380 SCTP_RTXR_T1_RTX,
381} sctp_retransmit_reason_t;
382
383
384typedef enum {
385 SCTP_LOWER_CWND_T3_RTX,
386 SCTP_LOWER_CWND_FAST_RTX,
387 SCTP_LOWER_CWND_ECNE,
388 SCTP_LOWER_CWND_INACTIVE,
389} sctp_lower_cwnd_t;
390
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407
408enum {
409 SCTP_AUTH_HMAC_ID_RESERVED_0,
410 SCTP_AUTH_HMAC_ID_SHA1,
411 SCTP_AUTH_HMAC_ID_RESERVED_2,
412#if defined (CONFIG_CRYPTO_SHA256) || defined (CONFIG_CRYPTO_SHA256_MODULE)
413 SCTP_AUTH_HMAC_ID_SHA256,
414#endif
415 __SCTP_AUTH_HMAC_MAX
416};
417
418#define SCTP_AUTH_HMAC_ID_MAX __SCTP_AUTH_HMAC_MAX - 1
419#define SCTP_AUTH_NUM_HMACS __SCTP_AUTH_HMAC_MAX
420#define SCTP_SHA1_SIG_SIZE 20
421#define SCTP_SHA256_SIG_SIZE 32
422
423
424
425
426
427#define SCTP_NUM_NOAUTH_CHUNKS 4
428#define SCTP_AUTH_MAX_CHUNKS (SCTP_NUM_CHUNK_TYPES - SCTP_NUM_NOAUTH_CHUNKS)
429
430
431
432
433#define SCTP_AUTH_RANDOM_LENGTH 32
434
435#endif
436