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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
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 | * | |
60c778b2 | 7 | * This file is part of the SCTP kernel implementation |
1da177e4 | 8 | * |
60c778b2 | 9 | * This SCTP implementation is free software; |
1da177e4 LT |
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 | * | |
60c778b2 | 15 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
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 | |
a6227e26 JK |
22 | * along with GNU CC; see the file COPYING. If not, see |
23 | * <http://www.gnu.org/licenses/>. | |
1da177e4 LT |
24 | * |
25 | * Please send any bug reports or fixes you make to the | |
26 | * email address(es): | |
91705c61 | 27 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 28 | * |
1da177e4 LT |
29 | * Written or modified by: |
30 | * La Monte H.P. Yarroll <piggy@acm.org> | |
31 | * Karl Knutson <karl@athena.chicago.il.us> | |
32 | * Randall Stewart <randall@stewart.chicago.il.us> | |
33 | * Ken Morneau <kmorneau@cisco.com> | |
34 | * Qiaobing Xie <qxie1@motorola.com> | |
35 | * Xingang Guo <xingang.guo@intel.com> | |
36 | * Sridhar Samudrala <samudrala@us.ibm.com> | |
37 | * Daisy Chang <daisyc@us.ibm.com> | |
1da177e4 LT |
38 | */ |
39 | ||
40 | #ifndef __sctp_constants_h__ | |
41 | #define __sctp_constants_h__ | |
42 | ||
1da177e4 LT |
43 | #include <linux/sctp.h> |
44 | #include <linux/ipv6.h> /* For ipv6hdr. */ | |
84965614 | 45 | #include <net/tcp_states.h> /* For TCP states used in enum sctp_sock_state */ |
1da177e4 LT |
46 | |
47 | /* Value used for stream negotiation. */ | |
48 | enum { SCTP_MAX_STREAM = 0xffff }; | |
49 | enum { SCTP_DEFAULT_OUTSTREAMS = 10 }; | |
50 | enum { SCTP_DEFAULT_INSTREAMS = SCTP_MAX_STREAM }; | |
51 | ||
52 | /* Since CIDs are sparse, we need all four of the following | |
53 | * symbols. CIDs are dense through SCTP_CID_BASE_MAX. | |
54 | */ | |
55 | #define SCTP_CID_BASE_MAX SCTP_CID_SHUTDOWN_COMPLETE | |
1da177e4 LT |
56 | |
57 | #define SCTP_NUM_BASE_CHUNK_TYPES (SCTP_CID_BASE_MAX + 1) | |
1da177e4 LT |
58 | |
59 | #define SCTP_NUM_ADDIP_CHUNK_TYPES 2 | |
60 | ||
61 | #define SCTP_NUM_PRSCTP_CHUNK_TYPES 1 | |
62 | ||
d884aa63 XL |
63 | #define SCTP_NUM_RECONF_CHUNK_TYPES 1 |
64 | ||
1f485649 VY |
65 | #define SCTP_NUM_AUTH_CHUNK_TYPES 1 |
66 | ||
67 | #define SCTP_NUM_CHUNK_TYPES (SCTP_NUM_BASE_CHUNK_TYPES + \ | |
68 | SCTP_NUM_ADDIP_CHUNK_TYPES +\ | |
69 | SCTP_NUM_PRSCTP_CHUNK_TYPES +\ | |
d884aa63 | 70 | SCTP_NUM_RECONF_CHUNK_TYPES +\ |
1f485649 VY |
71 | SCTP_NUM_AUTH_CHUNK_TYPES) |
72 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
83 | /* As a convenience for the state machine, we append SCTP_EVENT_* and |
84 | * SCTP_ULP_* to the list of possible chunks. | |
85 | */ | |
86 | ||
87 | typedef enum { | |
88 | SCTP_EVENT_TIMEOUT_NONE = 0, | |
89 | SCTP_EVENT_TIMEOUT_T1_COOKIE, | |
90 | SCTP_EVENT_TIMEOUT_T1_INIT, | |
91 | SCTP_EVENT_TIMEOUT_T2_SHUTDOWN, | |
92 | SCTP_EVENT_TIMEOUT_T3_RTX, | |
93 | SCTP_EVENT_TIMEOUT_T4_RTO, | |
94 | SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD, | |
95 | SCTP_EVENT_TIMEOUT_HEARTBEAT, | |
7b9438de | 96 | SCTP_EVENT_TIMEOUT_RECONF, |
1da177e4 LT |
97 | SCTP_EVENT_TIMEOUT_SACK, |
98 | SCTP_EVENT_TIMEOUT_AUTOCLOSE, | |
99 | } sctp_event_timeout_t; | |
100 | ||
101 | #define SCTP_EVENT_TIMEOUT_MAX SCTP_EVENT_TIMEOUT_AUTOCLOSE | |
102 | #define SCTP_NUM_TIMEOUT_TYPES (SCTP_EVENT_TIMEOUT_MAX + 1) | |
103 | ||
104 | typedef enum { | |
105 | SCTP_EVENT_NO_PENDING_TSN = 0, | |
106 | SCTP_EVENT_ICMP_PROTO_UNREACH, | |
107 | } sctp_event_other_t; | |
108 | ||
109 | #define SCTP_EVENT_OTHER_MAX SCTP_EVENT_ICMP_PROTO_UNREACH | |
110 | #define SCTP_NUM_OTHER_TYPES (SCTP_EVENT_OTHER_MAX + 1) | |
111 | ||
112 | /* These are primitive requests from the ULP. */ | |
113 | typedef enum { | |
114 | SCTP_PRIMITIVE_ASSOCIATE = 0, | |
115 | SCTP_PRIMITIVE_SHUTDOWN, | |
116 | SCTP_PRIMITIVE_ABORT, | |
117 | SCTP_PRIMITIVE_SEND, | |
118 | SCTP_PRIMITIVE_REQUESTHEARTBEAT, | |
119 | SCTP_PRIMITIVE_ASCONF, | |
7a090b04 | 120 | SCTP_PRIMITIVE_RECONF, |
1da177e4 LT |
121 | } sctp_event_primitive_t; |
122 | ||
7a090b04 | 123 | #define SCTP_EVENT_PRIMITIVE_MAX SCTP_PRIMITIVE_RECONF |
1da177e4 LT |
124 | #define SCTP_NUM_PRIMITIVE_TYPES (SCTP_EVENT_PRIMITIVE_MAX + 1) |
125 | ||
126 | /* We define here a utility type for manipulating subtypes. | |
127 | * The subtype constructors all work like this: | |
128 | * | |
129 | * sctp_subtype_t foo = SCTP_ST_CHUNK(SCTP_CID_INIT); | |
130 | */ | |
131 | ||
132 | typedef union { | |
6d85e68f | 133 | enum sctp_cid chunk; |
1da177e4 LT |
134 | sctp_event_timeout_t timeout; |
135 | sctp_event_other_t other; | |
136 | sctp_event_primitive_t primitive; | |
137 | } sctp_subtype_t; | |
138 | ||
139 | #define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \ | |
140 | static inline sctp_subtype_t \ | |
141 | SCTP_ST_## _name (_type _arg) \ | |
142 | { sctp_subtype_t _retval; _retval._elt = _arg; return _retval; } | |
143 | ||
6d85e68f | 144 | SCTP_SUBTYPE_CONSTRUCTOR(CHUNK, enum sctp_cid, chunk) |
1da177e4 LT |
145 | SCTP_SUBTYPE_CONSTRUCTOR(TIMEOUT, sctp_event_timeout_t, timeout) |
146 | SCTP_SUBTYPE_CONSTRUCTOR(OTHER, sctp_event_other_t, other) | |
147 | SCTP_SUBTYPE_CONSTRUCTOR(PRIMITIVE, sctp_event_primitive_t, primitive) | |
148 | ||
149 | ||
1da177e4 LT |
150 | #define sctp_chunk_is_data(a) (a->chunk_hdr->type == SCTP_CID_DATA) |
151 | ||
152 | /* Calculate the actual data size in a data chunk */ | |
153 | #define SCTP_DATA_SNDSIZE(c) ((int)((unsigned long)(c->chunk_end)\ | |
154 | - (unsigned long)(c->chunk_hdr)\ | |
9f8d3147 | 155 | - sizeof(struct sctp_data_chunk))) |
1da177e4 | 156 | |
1da177e4 | 157 | /* Internal error codes */ |
4785c7ae | 158 | enum sctp_ierror { |
1da177e4 LT |
159 | SCTP_IERROR_NO_ERROR = 0, |
160 | SCTP_IERROR_BASE = 1000, | |
161 | SCTP_IERROR_NO_COOKIE, | |
162 | SCTP_IERROR_BAD_SIG, | |
163 | SCTP_IERROR_STALE_COOKIE, | |
164 | SCTP_IERROR_NOMEM, | |
165 | SCTP_IERROR_MALFORMED, | |
166 | SCTP_IERROR_BAD_TAG, | |
167 | SCTP_IERROR_BIG_GAP, | |
168 | SCTP_IERROR_DUP_TSN, | |
169 | SCTP_IERROR_HIGH_TSN, | |
170 | SCTP_IERROR_IGNORE_TSN, | |
171 | SCTP_IERROR_NO_DATA, | |
172 | SCTP_IERROR_BAD_STREAM, | |
173 | SCTP_IERROR_BAD_PORTS, | |
bbd0d598 VY |
174 | SCTP_IERROR_AUTH_BAD_HMAC, |
175 | SCTP_IERROR_AUTH_BAD_KEYID, | |
176 | SCTP_IERROR_PROTO_VIOLATION, | |
7ab90804 VY |
177 | SCTP_IERROR_ERROR, |
178 | SCTP_IERROR_ABORT, | |
4785c7ae | 179 | }; |
1da177e4 LT |
180 | |
181 | ||
182 | ||
183 | /* SCTP state defines for internal state machine */ | |
184 | typedef enum { | |
185 | ||
0b8f9e25 VY |
186 | SCTP_STATE_CLOSED = 0, |
187 | SCTP_STATE_COOKIE_WAIT = 1, | |
188 | SCTP_STATE_COOKIE_ECHOED = 2, | |
189 | SCTP_STATE_ESTABLISHED = 3, | |
190 | SCTP_STATE_SHUTDOWN_PENDING = 4, | |
191 | SCTP_STATE_SHUTDOWN_SENT = 5, | |
192 | SCTP_STATE_SHUTDOWN_RECEIVED = 6, | |
193 | SCTP_STATE_SHUTDOWN_ACK_SENT = 7, | |
1da177e4 LT |
194 | |
195 | } sctp_state_t; | |
196 | ||
197 | #define SCTP_STATE_MAX SCTP_STATE_SHUTDOWN_ACK_SENT | |
198 | #define SCTP_STATE_NUM_STATES (SCTP_STATE_MAX + 1) | |
199 | ||
200 | /* These are values for sk->state. | |
201 | * For a UDP-style SCTP socket, the states are defined as follows | |
202 | * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to | |
203 | * accept new associations, but it can initiate the creation of new ones. | |
204 | * - A socket in SCTP_SS_LISTENING state indicates that it is willing to | |
205 | * accept new associations and can initiate the creation of new ones. | |
206 | * - A socket in SCTP_SS_ESTABLISHED state indicates that it is a peeled off | |
207 | * socket with one association. | |
208 | * For a TCP-style SCTP socket, the states are defined as follows | |
209 | * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to | |
210 | * accept new associations, but it can initiate the creation of new ones. | |
211 | * - A socket in SCTP_SS_LISTENING state indicates that it is willing to | |
212 | * accept new associations, but cannot initiate the creation of new ones. | |
213 | * - A socket in SCTP_SS_ESTABLISHED state indicates that it has a single | |
214 | * association. | |
215 | */ | |
84965614 | 216 | enum sctp_sock_state { |
1da177e4 LT |
217 | SCTP_SS_CLOSED = TCP_CLOSE, |
218 | SCTP_SS_LISTENING = TCP_LISTEN, | |
219 | SCTP_SS_ESTABLISHING = TCP_SYN_SENT, | |
220 | SCTP_SS_ESTABLISHED = TCP_ESTABLISHED, | |
df7e88f6 | 221 | SCTP_SS_CLOSING = TCP_CLOSE_WAIT, |
84965614 | 222 | }; |
1da177e4 LT |
223 | |
224 | /* These functions map various type to printable names. */ | |
225 | const char *sctp_cname(const sctp_subtype_t); /* chunk types */ | |
226 | const char *sctp_oname(const sctp_subtype_t); /* other events */ | |
227 | const char *sctp_tname(const sctp_subtype_t); /* timeouts */ | |
228 | const char *sctp_pname(const sctp_subtype_t); /* primitives */ | |
229 | ||
230 | /* This is a table of printable names of sctp_state_t's. */ | |
36cbd3dc JE |
231 | extern const char *const sctp_state_tbl[]; |
232 | extern const char *const sctp_evttype_tbl[]; | |
233 | extern const char *const sctp_status_tbl[]; | |
1da177e4 LT |
234 | |
235 | /* Maximum chunk length considering padding requirements. */ | |
236 | enum { SCTP_MAX_CHUNK_LEN = ((1<<16) - sizeof(__u32)) }; | |
237 | ||
238 | /* Encourage Cookie-Echo bundling by pre-fragmenting chunks a little | |
239 | * harder (until reaching ESTABLISHED state). | |
240 | */ | |
241 | enum { SCTP_ARBITRARY_COOKIE_ECHO_LEN = 200 }; | |
242 | ||
243 | /* Guess at how big to make the TSN mapping array. | |
244 | * We guarantee that we can handle at least this big a gap between the | |
245 | * cumulative ACK and the highest TSN. In practice, we can often | |
246 | * handle up to twice this value. | |
247 | * | |
248 | * NEVER make this more than 32767 (2^15-1). The Gap Ack Blocks in a | |
249 | * SACK (see section 3.3.4) are only 16 bits, so 2*SCTP_TSN_MAP_SIZE | |
250 | * must be less than 65535 (2^16 - 1), or we will have overflow | |
251 | * problems creating SACK's. | |
252 | */ | |
8e1ee18c VY |
253 | #define SCTP_TSN_MAP_INITIAL BITS_PER_LONG |
254 | #define SCTP_TSN_MAP_INCREMENT SCTP_TSN_MAP_INITIAL | |
255 | #define SCTP_TSN_MAP_SIZE 4096 | |
1da177e4 LT |
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 | ||
2f85a429 | 266 | /* Heartbeat interval - 30 secs */ |
3fd091e7 | 267 | #define SCTP_DEFAULT_TIMEOUT_HEARTBEAT (30*1000) |
1da177e4 | 268 | |
2f85a429 | 269 | /* Delayed sack timer - 200ms */ |
3fd091e7 | 270 | #define SCTP_DEFAULT_TIMEOUT_SACK (200) |
1da177e4 LT |
271 | |
272 | /* RTO.Initial - 3 seconds | |
273 | * RTO.Min - 1 second | |
274 | * RTO.Max - 60 seconds | |
275 | * RTO.Alpha - 1/8 | |
276 | * RTO.Beta - 1/4 | |
277 | */ | |
3fd091e7 VY |
278 | #define SCTP_RTO_INITIAL (3 * 1000) |
279 | #define SCTP_RTO_MIN (1 * 1000) | |
280 | #define SCTP_RTO_MAX (60 * 1000) | |
1da177e4 LT |
281 | |
282 | #define SCTP_RTO_ALPHA 3 /* 1/8 when converted to right shifts. */ | |
283 | #define SCTP_RTO_BETA 2 /* 1/4 when converted to right shifts. */ | |
284 | ||
285 | /* Maximum number of new data packets that can be sent in a burst. */ | |
70331571 | 286 | #define SCTP_DEFAULT_MAX_BURST 4 |
1da177e4 LT |
287 | |
288 | #define SCTP_CLOCK_GRANULARITY 1 /* 1 jiffy */ | |
289 | ||
3fd091e7 | 290 | #define SCTP_DEFAULT_COOKIE_LIFE (60 * 1000) /* 60 seconds */ |
1da177e4 LT |
291 | |
292 | #define SCTP_DEFAULT_MINWINDOW 1500 /* default minimum rwnd size */ | |
293 | #define SCTP_DEFAULT_MAXWINDOW 65535 /* default rwnd size */ | |
90f2f531 VY |
294 | #define SCTP_DEFAULT_RWND_SHIFT 4 /* by default, update on 1/16 of |
295 | * rcvbuf, which is 1/8 of initial | |
296 | * window | |
297 | */ | |
1da177e4 LT |
298 | #define SCTP_DEFAULT_MAXSEGMENT 1500 /* MTU size, this is the limit |
299 | * to which we will raise the P-MTU. | |
300 | */ | |
301 | #define SCTP_DEFAULT_MINSEGMENT 512 /* MTU size ... if no mtu disc */ | |
570617e7 | 302 | |
1da177e4 LT |
303 | #define SCTP_SECRET_SIZE 32 /* Number of octets in a 256 bits. */ |
304 | ||
305 | #define SCTP_SIGNATURE_SIZE 20 /* size of a SLA-1 signature */ | |
306 | ||
307 | #define SCTP_COOKIE_MULTIPLE 32 /* Pad out our cookie to make our hash | |
308 | * functions simpler to write. | |
309 | */ | |
310 | ||
1da177e4 LT |
311 | /* These return values describe the success or failure of a number of |
312 | * routines which form the lower interface to SCTP_outqueue. | |
313 | */ | |
86b36f2a | 314 | enum sctp_xmit { |
1da177e4 LT |
315 | SCTP_XMIT_OK, |
316 | SCTP_XMIT_PMTU_FULL, | |
317 | SCTP_XMIT_RWND_FULL, | |
526cbef7 | 318 | SCTP_XMIT_DELAY, |
86b36f2a | 319 | }; |
1da177e4 LT |
320 | |
321 | /* These are the commands for manipulating transports. */ | |
0ceaeebe | 322 | enum sctp_transport_cmd { |
1da177e4 LT |
323 | SCTP_TRANSPORT_UP, |
324 | SCTP_TRANSPORT_DOWN, | |
5aa93bcf | 325 | SCTP_TRANSPORT_PF, |
0ceaeebe | 326 | }; |
1da177e4 LT |
327 | |
328 | /* These are the address scopes defined mainly for IPv4 addresses | |
329 | * based on draft of SCTP IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>. | |
330 | * These scopes are hopefully generic enough to be used on scoping both | |
331 | * IPv4 and IPv6 addresses in SCTP. | |
332 | * At this point, the IPv6 scopes will be mapped to these internal scopes | |
333 | * as much as possible. | |
334 | */ | |
1c662018 | 335 | enum sctp_scope { |
1da177e4 LT |
336 | SCTP_SCOPE_GLOBAL, /* IPv4 global addresses */ |
337 | SCTP_SCOPE_PRIVATE, /* IPv4 private addresses */ | |
338 | SCTP_SCOPE_LINK, /* IPv4 link local address */ | |
339 | SCTP_SCOPE_LOOPBACK, /* IPv4 loopback address */ | |
340 | SCTP_SCOPE_UNUSABLE, /* IPv4 unusable addresses */ | |
1c662018 | 341 | }; |
1da177e4 | 342 | |
701ef3e6 | 343 | enum { |
72388433 BD |
344 | SCTP_SCOPE_POLICY_DISABLE, /* Disable IPv4 address scoping */ |
345 | SCTP_SCOPE_POLICY_ENABLE, /* Enable IPv4 address scoping */ | |
346 | SCTP_SCOPE_POLICY_PRIVATE, /* Follow draft but allow IPv4 private addresses */ | |
347 | SCTP_SCOPE_POLICY_LINK, /* Follow draft but allow IPv4 link local addresses */ | |
701ef3e6 XL |
348 | }; |
349 | ||
350 | #define SCTP_SCOPE_POLICY_MAX SCTP_SCOPE_POLICY_LINK | |
72388433 | 351 | |
1da177e4 LT |
352 | /* Based on IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>, |
353 | * SCTP IPv4 unusable addresses: 0.0.0.0/8, 224.0.0.0/4, 198.18.0.0/24, | |
354 | * 192.88.99.0/24. | |
355 | * Also, RFC 8.4, non-unicast addresses are not considered valid SCTP | |
356 | * addresses. | |
357 | */ | |
b5cb2bbc JP |
358 | #define IS_IPV4_UNUSABLE_ADDRESS(a) \ |
359 | ((htonl(INADDR_BROADCAST) == a) || \ | |
360 | ipv4_is_multicast(a) || \ | |
361 | ipv4_is_zeronet(a) || \ | |
362 | ipv4_is_test_198(a) || \ | |
363 | ipv4_is_anycast_6to4(a)) | |
1da177e4 LT |
364 | |
365 | /* Flags used for the bind address copy functions. */ | |
366 | #define SCTP_ADDR6_ALLOWED 0x00000001 /* IPv6 address is allowed by | |
367 | local sock family */ | |
368 | #define SCTP_ADDR4_PEERSUPP 0x00000002 /* IPv4 address is supported by | |
369 | peer */ | |
370 | #define SCTP_ADDR6_PEERSUPP 0x00000004 /* IPv6 address is supported by | |
371 | peer */ | |
372 | ||
373 | /* Reasons to retransmit. */ | |
125c2982 | 374 | enum sctp_retransmit_reason { |
1da177e4 LT |
375 | SCTP_RTXR_T3_RTX, |
376 | SCTP_RTXR_FAST_RTX, | |
377 | SCTP_RTXR_PMTUD, | |
b6157d8e | 378 | SCTP_RTXR_T1_RTX, |
125c2982 | 379 | }; |
1da177e4 LT |
380 | |
381 | /* Reasons to lower cwnd. */ | |
233e7936 | 382 | enum sctp_lower_cwnd { |
1da177e4 LT |
383 | SCTP_LOWER_CWND_T3_RTX, |
384 | SCTP_LOWER_CWND_FAST_RTX, | |
385 | SCTP_LOWER_CWND_ECNE, | |
386 | SCTP_LOWER_CWND_INACTIVE, | |
233e7936 | 387 | }; |
1da177e4 | 388 | |
1f485649 VY |
389 | |
390 | /* SCTP-AUTH Necessary constants */ | |
391 | ||
392 | /* SCTP-AUTH, Section 3.3 | |
393 | * | |
394 | * The following Table 2 shows the currently defined values for HMAC | |
395 | * identifiers. | |
396 | * | |
397 | * +-----------------+--------------------------+ | |
398 | * | HMAC Identifier | Message Digest Algorithm | | |
399 | * +-----------------+--------------------------+ | |
400 | * | 0 | Reserved | | |
401 | * | 1 | SHA-1 defined in [8] | | |
402 | * | 2 | Reserved | | |
403 | * | 3 | SHA-256 defined in [8] | | |
404 | * +-----------------+--------------------------+ | |
405 | */ | |
406 | enum { | |
407 | SCTP_AUTH_HMAC_ID_RESERVED_0, | |
408 | SCTP_AUTH_HMAC_ID_SHA1, | |
409 | SCTP_AUTH_HMAC_ID_RESERVED_2, | |
b7e0fe9f VY |
410 | #if defined (CONFIG_CRYPTO_SHA256) || defined (CONFIG_CRYPTO_SHA256_MODULE) |
411 | SCTP_AUTH_HMAC_ID_SHA256, | |
412 | #endif | |
413 | __SCTP_AUTH_HMAC_MAX | |
1f485649 VY |
414 | }; |
415 | ||
b7e0fe9f VY |
416 | #define SCTP_AUTH_HMAC_ID_MAX __SCTP_AUTH_HMAC_MAX - 1 |
417 | #define SCTP_AUTH_NUM_HMACS __SCTP_AUTH_HMAC_MAX | |
1f485649 VY |
418 | #define SCTP_SHA1_SIG_SIZE 20 |
419 | #define SCTP_SHA256_SIG_SIZE 32 | |
420 | ||
421 | /* SCTP-AUTH, Section 3.2 | |
422 | * The chunk types for INIT, INIT-ACK, SHUTDOWN-COMPLETE and AUTH chunks | |
423 | * MUST NOT be listed in the CHUNKS parameter | |
424 | */ | |
425 | #define SCTP_NUM_NOAUTH_CHUNKS 4 | |
426 | #define SCTP_AUTH_MAX_CHUNKS (SCTP_NUM_CHUNK_TYPES - SCTP_NUM_NOAUTH_CHUNKS) | |
427 | ||
428 | /* SCTP-AUTH Section 6.1 | |
429 | * The RANDOM parameter MUST contain a 32 byte random number. | |
430 | */ | |
431 | #define SCTP_AUTH_RANDOM_LENGTH 32 | |
432 | ||
1da177e4 | 433 | #endif /* __sctp_constants_h__ */ |