147505b8bSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 260c778b2SVlad Yasevich /* SCTP kernel implementation 31da177e4SLinus Torvalds * (C) Copyright IBM Corp. 2001, 2004 41da177e4SLinus Torvalds * Copyright (c) 1999-2000 Cisco, Inc. 51da177e4SLinus Torvalds * Copyright (c) 1999-2001 Motorola, Inc. 61da177e4SLinus Torvalds * Copyright (c) 2001 Intel Corp. 71da177e4SLinus Torvalds * 860c778b2SVlad Yasevich * This file is part of the SCTP kernel implementation 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Please send any bug reports or fixes you make to the 111da177e4SLinus Torvalds * email address(es): 1291705c61SDaniel Borkmann * lksctp developers <linux-sctp@vger.kernel.org> 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * Written or modified by: 151da177e4SLinus Torvalds * La Monte H.P. Yarroll <piggy@acm.org> 161da177e4SLinus Torvalds * Karl Knutson <karl@athena.chicago.il.us> 171da177e4SLinus Torvalds * Randall Stewart <randall@stewart.chicago.il.us> 181da177e4SLinus Torvalds * Ken Morneau <kmorneau@cisco.com> 191da177e4SLinus Torvalds * Qiaobing Xie <qxie1@motorola.com> 201da177e4SLinus Torvalds * Xingang Guo <xingang.guo@intel.com> 211da177e4SLinus Torvalds * Sridhar Samudrala <samudrala@us.ibm.com> 221da177e4SLinus Torvalds * Daisy Chang <daisyc@us.ibm.com> 231da177e4SLinus Torvalds */ 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #ifndef __sctp_constants_h__ 261da177e4SLinus Torvalds #define __sctp_constants_h__ 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #include <linux/sctp.h> 291da177e4SLinus Torvalds #include <linux/ipv6.h> /* For ipv6hdr. */ 3084965614SXin Long #include <net/tcp_states.h> /* For TCP states used in enum sctp_sock_state */ 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds /* Value used for stream negotiation. */ 331da177e4SLinus Torvalds enum { SCTP_MAX_STREAM = 0xffff }; 341da177e4SLinus Torvalds enum { SCTP_DEFAULT_OUTSTREAMS = 10 }; 351da177e4SLinus Torvalds enum { SCTP_DEFAULT_INSTREAMS = SCTP_MAX_STREAM }; 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds /* Since CIDs are sparse, we need all four of the following 381da177e4SLinus Torvalds * symbols. CIDs are dense through SCTP_CID_BASE_MAX. 391da177e4SLinus Torvalds */ 401da177e4SLinus Torvalds #define SCTP_CID_BASE_MAX SCTP_CID_SHUTDOWN_COMPLETE 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds #define SCTP_NUM_BASE_CHUNK_TYPES (SCTP_CID_BASE_MAX + 1) 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define SCTP_NUM_ADDIP_CHUNK_TYPES 2 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #define SCTP_NUM_PRSCTP_CHUNK_TYPES 1 471da177e4SLinus Torvalds 48d884aa63SXin Long #define SCTP_NUM_RECONF_CHUNK_TYPES 1 49d884aa63SXin Long 501f485649SVlad Yasevich #define SCTP_NUM_AUTH_CHUNK_TYPES 1 511f485649SVlad Yasevich 521f485649SVlad Yasevich #define SCTP_NUM_CHUNK_TYPES (SCTP_NUM_BASE_CHUNK_TYPES + \ 531f485649SVlad Yasevich SCTP_NUM_ADDIP_CHUNK_TYPES +\ 541f485649SVlad Yasevich SCTP_NUM_PRSCTP_CHUNK_TYPES +\ 55d884aa63SXin Long SCTP_NUM_RECONF_CHUNK_TYPES +\ 561f485649SVlad Yasevich SCTP_NUM_AUTH_CHUNK_TYPES) 571f485649SVlad Yasevich 581da177e4SLinus Torvalds /* These are the different flavours of event. */ 5988ee48c1SXin Long enum sctp_event_type { 601da177e4SLinus Torvalds SCTP_EVENT_T_CHUNK = 1, 611da177e4SLinus Torvalds SCTP_EVENT_T_TIMEOUT, 621da177e4SLinus Torvalds SCTP_EVENT_T_OTHER, 631da177e4SLinus Torvalds SCTP_EVENT_T_PRIMITIVE 6461f0eb07SXin Long }; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds /* As a convenience for the state machine, we append SCTP_EVENT_* and 671da177e4SLinus Torvalds * SCTP_ULP_* to the list of possible chunks. 681da177e4SLinus Torvalds */ 691da177e4SLinus Torvalds 7019cd1592SXin Long enum sctp_event_timeout { 711da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_NONE = 0, 721da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_T1_COOKIE, 731da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_T1_INIT, 741da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_T2_SHUTDOWN, 751da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_T3_RTX, 761da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_T4_RTO, 771da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD, 781da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_HEARTBEAT, 797b9438deSXin Long SCTP_EVENT_TIMEOUT_RECONF, 801da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_SACK, 811da177e4SLinus Torvalds SCTP_EVENT_TIMEOUT_AUTOCLOSE, 8219cd1592SXin Long }; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds #define SCTP_EVENT_TIMEOUT_MAX SCTP_EVENT_TIMEOUT_AUTOCLOSE 851da177e4SLinus Torvalds #define SCTP_NUM_TIMEOUT_TYPES (SCTP_EVENT_TIMEOUT_MAX + 1) 861da177e4SLinus Torvalds 87a0f098d0SXin Long enum sctp_event_other { 881da177e4SLinus Torvalds SCTP_EVENT_NO_PENDING_TSN = 0, 891da177e4SLinus Torvalds SCTP_EVENT_ICMP_PROTO_UNREACH, 90a0f098d0SXin Long }; 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds #define SCTP_EVENT_OTHER_MAX SCTP_EVENT_ICMP_PROTO_UNREACH 931da177e4SLinus Torvalds #define SCTP_NUM_OTHER_TYPES (SCTP_EVENT_OTHER_MAX + 1) 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds /* These are primitive requests from the ULP. */ 96dc1e0e6eSXin Long enum sctp_event_primitive { 971da177e4SLinus Torvalds SCTP_PRIMITIVE_ASSOCIATE = 0, 981da177e4SLinus Torvalds SCTP_PRIMITIVE_SHUTDOWN, 991da177e4SLinus Torvalds SCTP_PRIMITIVE_ABORT, 1001da177e4SLinus Torvalds SCTP_PRIMITIVE_SEND, 1011da177e4SLinus Torvalds SCTP_PRIMITIVE_REQUESTHEARTBEAT, 1021da177e4SLinus Torvalds SCTP_PRIMITIVE_ASCONF, 1037a090b04SXin Long SCTP_PRIMITIVE_RECONF, 104dc1e0e6eSXin Long }; 1051da177e4SLinus Torvalds 1067a090b04SXin Long #define SCTP_EVENT_PRIMITIVE_MAX SCTP_PRIMITIVE_RECONF 1071da177e4SLinus Torvalds #define SCTP_NUM_PRIMITIVE_TYPES (SCTP_EVENT_PRIMITIVE_MAX + 1) 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds /* We define here a utility type for manipulating subtypes. 1101da177e4SLinus Torvalds * The subtype constructors all work like this: 1111da177e4SLinus Torvalds * 112bfc6f827SXin Long * union sctp_subtype foo = SCTP_ST_CHUNK(SCTP_CID_INIT); 1131da177e4SLinus Torvalds */ 1141da177e4SLinus Torvalds 115bfc6f827SXin Long union sctp_subtype { 1166d85e68fSXin Long enum sctp_cid chunk; 11719cd1592SXin Long enum sctp_event_timeout timeout; 118a0f098d0SXin Long enum sctp_event_other other; 119dc1e0e6eSXin Long enum sctp_event_primitive primitive; 120bfc6f827SXin Long }; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds #define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \ 123bfc6f827SXin Long static inline union sctp_subtype \ 1241da177e4SLinus Torvalds SCTP_ST_## _name (_type _arg) \ 125bfc6f827SXin Long { union sctp_subtype _retval; _retval._elt = _arg; return _retval; } 1261da177e4SLinus Torvalds 1276d85e68fSXin Long SCTP_SUBTYPE_CONSTRUCTOR(CHUNK, enum sctp_cid, chunk) 12819cd1592SXin Long SCTP_SUBTYPE_CONSTRUCTOR(TIMEOUT, enum sctp_event_timeout, timeout) 129a0f098d0SXin Long SCTP_SUBTYPE_CONSTRUCTOR(OTHER, enum sctp_event_other, other) 130dc1e0e6eSXin Long SCTP_SUBTYPE_CONSTRUCTOR(PRIMITIVE, enum sctp_event_primitive, primitive) 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds 133668c9bebSXin Long #define sctp_chunk_is_data(a) (a->chunk_hdr->type == SCTP_CID_DATA || \ 134668c9bebSXin Long a->chunk_hdr->type == SCTP_CID_I_DATA) 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds /* Internal error codes */ 1374785c7aeSXin Long enum sctp_ierror { 1381da177e4SLinus Torvalds SCTP_IERROR_NO_ERROR = 0, 1391da177e4SLinus Torvalds SCTP_IERROR_BASE = 1000, 1401da177e4SLinus Torvalds SCTP_IERROR_NO_COOKIE, 1411da177e4SLinus Torvalds SCTP_IERROR_BAD_SIG, 1421da177e4SLinus Torvalds SCTP_IERROR_STALE_COOKIE, 1431da177e4SLinus Torvalds SCTP_IERROR_NOMEM, 1441da177e4SLinus Torvalds SCTP_IERROR_MALFORMED, 1451da177e4SLinus Torvalds SCTP_IERROR_BAD_TAG, 1461da177e4SLinus Torvalds SCTP_IERROR_BIG_GAP, 1471da177e4SLinus Torvalds SCTP_IERROR_DUP_TSN, 1481da177e4SLinus Torvalds SCTP_IERROR_HIGH_TSN, 1491da177e4SLinus Torvalds SCTP_IERROR_IGNORE_TSN, 1501da177e4SLinus Torvalds SCTP_IERROR_NO_DATA, 1511da177e4SLinus Torvalds SCTP_IERROR_BAD_STREAM, 1521da177e4SLinus Torvalds SCTP_IERROR_BAD_PORTS, 153bbd0d598SVlad Yasevich SCTP_IERROR_AUTH_BAD_HMAC, 154bbd0d598SVlad Yasevich SCTP_IERROR_AUTH_BAD_KEYID, 155bbd0d598SVlad Yasevich SCTP_IERROR_PROTO_VIOLATION, 1567ab90804SVlad Yasevich SCTP_IERROR_ERROR, 1577ab90804SVlad Yasevich SCTP_IERROR_ABORT, 1584785c7aeSXin Long }; 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds /* SCTP state defines for internal state machine */ 16352106019SXin Long enum sctp_state { 1641da177e4SLinus Torvalds 1650b8f9e25SVlad Yasevich SCTP_STATE_CLOSED = 0, 1660b8f9e25SVlad Yasevich SCTP_STATE_COOKIE_WAIT = 1, 1670b8f9e25SVlad Yasevich SCTP_STATE_COOKIE_ECHOED = 2, 1680b8f9e25SVlad Yasevich SCTP_STATE_ESTABLISHED = 3, 1690b8f9e25SVlad Yasevich SCTP_STATE_SHUTDOWN_PENDING = 4, 1700b8f9e25SVlad Yasevich SCTP_STATE_SHUTDOWN_SENT = 5, 1710b8f9e25SVlad Yasevich SCTP_STATE_SHUTDOWN_RECEIVED = 6, 1720b8f9e25SVlad Yasevich SCTP_STATE_SHUTDOWN_ACK_SENT = 7, 1731da177e4SLinus Torvalds 17452106019SXin Long }; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds #define SCTP_STATE_MAX SCTP_STATE_SHUTDOWN_ACK_SENT 1771da177e4SLinus Torvalds #define SCTP_STATE_NUM_STATES (SCTP_STATE_MAX + 1) 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds /* These are values for sk->state. 1801da177e4SLinus Torvalds * For a UDP-style SCTP socket, the states are defined as follows 1811da177e4SLinus Torvalds * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to 1821da177e4SLinus Torvalds * accept new associations, but it can initiate the creation of new ones. 1831da177e4SLinus Torvalds * - A socket in SCTP_SS_LISTENING state indicates that it is willing to 1841da177e4SLinus Torvalds * accept new associations and can initiate the creation of new ones. 1851da177e4SLinus Torvalds * - A socket in SCTP_SS_ESTABLISHED state indicates that it is a peeled off 1861da177e4SLinus Torvalds * socket with one association. 1871da177e4SLinus Torvalds * For a TCP-style SCTP socket, the states are defined as follows 1881da177e4SLinus Torvalds * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to 1891da177e4SLinus Torvalds * accept new associations, but it can initiate the creation of new ones. 1901da177e4SLinus Torvalds * - A socket in SCTP_SS_LISTENING state indicates that it is willing to 1911da177e4SLinus Torvalds * accept new associations, but cannot initiate the creation of new ones. 1921da177e4SLinus Torvalds * - A socket in SCTP_SS_ESTABLISHED state indicates that it has a single 1931da177e4SLinus Torvalds * association. 1941da177e4SLinus Torvalds */ 19584965614SXin Long enum sctp_sock_state { 1961da177e4SLinus Torvalds SCTP_SS_CLOSED = TCP_CLOSE, 1971da177e4SLinus Torvalds SCTP_SS_LISTENING = TCP_LISTEN, 1981da177e4SLinus Torvalds SCTP_SS_ESTABLISHING = TCP_SYN_SENT, 1991da177e4SLinus Torvalds SCTP_SS_ESTABLISHED = TCP_ESTABLISHED, 200df7e88f6SXin Long SCTP_SS_CLOSING = TCP_CLOSE_WAIT, 20184965614SXin Long }; 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds /* These functions map various type to printable names. */ 204bfc6f827SXin Long const char *sctp_cname(const union sctp_subtype id); /* chunk types */ 205bfc6f827SXin Long const char *sctp_oname(const union sctp_subtype id); /* other events */ 206bfc6f827SXin Long const char *sctp_tname(const union sctp_subtype id); /* timeouts */ 207bfc6f827SXin Long const char *sctp_pname(const union sctp_subtype id); /* primitives */ 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds /* This is a table of printable names of sctp_state_t's. */ 21036cbd3dcSJan Engelhardt extern const char *const sctp_state_tbl[]; 21136cbd3dcSJan Engelhardt extern const char *const sctp_evttype_tbl[]; 21236cbd3dcSJan Engelhardt extern const char *const sctp_status_tbl[]; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds /* Maximum chunk length considering padding requirements. */ 2151da177e4SLinus Torvalds enum { SCTP_MAX_CHUNK_LEN = ((1<<16) - sizeof(__u32)) }; 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds /* Encourage Cookie-Echo bundling by pre-fragmenting chunks a little 2181da177e4SLinus Torvalds * harder (until reaching ESTABLISHED state). 2191da177e4SLinus Torvalds */ 2201da177e4SLinus Torvalds enum { SCTP_ARBITRARY_COOKIE_ECHO_LEN = 200 }; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds /* Guess at how big to make the TSN mapping array. 2231da177e4SLinus Torvalds * We guarantee that we can handle at least this big a gap between the 2241da177e4SLinus Torvalds * cumulative ACK and the highest TSN. In practice, we can often 2251da177e4SLinus Torvalds * handle up to twice this value. 2261da177e4SLinus Torvalds * 2271da177e4SLinus Torvalds * NEVER make this more than 32767 (2^15-1). The Gap Ack Blocks in a 2281da177e4SLinus Torvalds * SACK (see section 3.3.4) are only 16 bits, so 2*SCTP_TSN_MAP_SIZE 2291da177e4SLinus Torvalds * must be less than 65535 (2^16 - 1), or we will have overflow 2301da177e4SLinus Torvalds * problems creating SACK's. 2311da177e4SLinus Torvalds */ 2328e1ee18cSVlad Yasevich #define SCTP_TSN_MAP_INITIAL BITS_PER_LONG 2338e1ee18cSVlad Yasevich #define SCTP_TSN_MAP_INCREMENT SCTP_TSN_MAP_INITIAL 2348e1ee18cSVlad Yasevich #define SCTP_TSN_MAP_SIZE 4096 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds /* We will not record more than this many duplicate TSNs between two 237c45698f8SMarcelo Ricardo Leitner * SACKs. The minimum PMTU is 512. Remove all the headers and there 238c45698f8SMarcelo Ricardo Leitner * is enough room for 117 duplicate reports. Round down to the 2391da177e4SLinus Torvalds * nearest power of 2. 2401da177e4SLinus Torvalds */ 2411da177e4SLinus Torvalds enum { SCTP_MAX_DUP_TSNS = 16 }; 2421da177e4SLinus Torvalds enum { SCTP_MAX_GABS = 16 }; 2431da177e4SLinus Torvalds 2442f85a429SVlad Yasevich /* Heartbeat interval - 30 secs */ 2453fd091e7SVladislav Yasevich #define SCTP_DEFAULT_TIMEOUT_HEARTBEAT (30*1000) 2461da177e4SLinus Torvalds 2472f85a429SVlad Yasevich /* Delayed sack timer - 200ms */ 2483fd091e7SVladislav Yasevich #define SCTP_DEFAULT_TIMEOUT_SACK (200) 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds /* RTO.Initial - 3 seconds 2511da177e4SLinus Torvalds * RTO.Min - 1 second 2521da177e4SLinus Torvalds * RTO.Max - 60 seconds 2531da177e4SLinus Torvalds * RTO.Alpha - 1/8 2541da177e4SLinus Torvalds * RTO.Beta - 1/4 2551da177e4SLinus Torvalds */ 2563fd091e7SVladislav Yasevich #define SCTP_RTO_INITIAL (3 * 1000) 2573fd091e7SVladislav Yasevich #define SCTP_RTO_MIN (1 * 1000) 2583fd091e7SVladislav Yasevich #define SCTP_RTO_MAX (60 * 1000) 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds #define SCTP_RTO_ALPHA 3 /* 1/8 when converted to right shifts. */ 2611da177e4SLinus Torvalds #define SCTP_RTO_BETA 2 /* 1/4 when converted to right shifts. */ 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds /* Maximum number of new data packets that can be sent in a burst. */ 26470331571SVlad Yasevich #define SCTP_DEFAULT_MAX_BURST 4 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds #define SCTP_CLOCK_GRANULARITY 1 /* 1 jiffy */ 2671da177e4SLinus Torvalds 2683fd091e7SVladislav Yasevich #define SCTP_DEFAULT_COOKIE_LIFE (60 * 1000) /* 60 seconds */ 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds #define SCTP_DEFAULT_MINWINDOW 1500 /* default minimum rwnd size */ 2711da177e4SLinus Torvalds #define SCTP_DEFAULT_MAXWINDOW 65535 /* default rwnd size */ 27290f2f531SVlad Yasevich #define SCTP_DEFAULT_RWND_SHIFT 4 /* by default, update on 1/16 of 27390f2f531SVlad Yasevich * rcvbuf, which is 1/8 of initial 27490f2f531SVlad Yasevich * window 27590f2f531SVlad Yasevich */ 2761da177e4SLinus Torvalds #define SCTP_DEFAULT_MAXSEGMENT 1500 /* MTU size, this is the limit 2771da177e4SLinus Torvalds * to which we will raise the P-MTU. 2781da177e4SLinus Torvalds */ 2791da177e4SLinus Torvalds #define SCTP_DEFAULT_MINSEGMENT 512 /* MTU size ... if no mtu disc */ 280570617e7SDaniel Borkmann 2811da177e4SLinus Torvalds #define SCTP_SECRET_SIZE 32 /* Number of octets in a 256 bits. */ 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds #define SCTP_SIGNATURE_SIZE 20 /* size of a SLA-1 signature */ 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds #define SCTP_COOKIE_MULTIPLE 32 /* Pad out our cookie to make our hash 2861da177e4SLinus Torvalds * functions simpler to write. 2871da177e4SLinus Torvalds */ 2881da177e4SLinus Torvalds 289965ae444SXin Long #define SCTP_DEFAULT_UDP_PORT 9899 /* default UDP tunneling port */ 290965ae444SXin Long 291aef587beSXin Long /* These are the values for pf exposure, UNUSED is to keep compatible with old 292aef587beSXin Long * applications by default. 293aef587beSXin Long */ 294aef587beSXin Long enum { 295aef587beSXin Long SCTP_PF_EXPOSE_UNSET, 296aef587beSXin Long SCTP_PF_EXPOSE_DISABLE, 297aef587beSXin Long SCTP_PF_EXPOSE_ENABLE, 298aef587beSXin Long }; 299aef587beSXin Long #define SCTP_PF_EXPOSE_MAX SCTP_PF_EXPOSE_ENABLE 300aef587beSXin Long 30134515e94SXin Long #define SCTP_PS_RETRANS_MAX 0xffff 30234515e94SXin Long 3031da177e4SLinus Torvalds /* These return values describe the success or failure of a number of 3041da177e4SLinus Torvalds * routines which form the lower interface to SCTP_outqueue. 3051da177e4SLinus Torvalds */ 30686b36f2aSXin Long enum sctp_xmit { 3071da177e4SLinus Torvalds SCTP_XMIT_OK, 3081da177e4SLinus Torvalds SCTP_XMIT_PMTU_FULL, 3091da177e4SLinus Torvalds SCTP_XMIT_RWND_FULL, 310526cbef7SDavid Laight SCTP_XMIT_DELAY, 31186b36f2aSXin Long }; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds /* These are the commands for manipulating transports. */ 3140ceaeebeSXin Long enum sctp_transport_cmd { 3151da177e4SLinus Torvalds SCTP_TRANSPORT_UP, 3161da177e4SLinus Torvalds SCTP_TRANSPORT_DOWN, 3175aa93bcfSNeil Horman SCTP_TRANSPORT_PF, 3180ceaeebeSXin Long }; 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds /* These are the address scopes defined mainly for IPv4 addresses 3211da177e4SLinus Torvalds * based on draft of SCTP IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>. 3221da177e4SLinus Torvalds * These scopes are hopefully generic enough to be used on scoping both 3231da177e4SLinus Torvalds * IPv4 and IPv6 addresses in SCTP. 3241da177e4SLinus Torvalds * At this point, the IPv6 scopes will be mapped to these internal scopes 3251da177e4SLinus Torvalds * as much as possible. 3261da177e4SLinus Torvalds */ 3271c662018SXin Long enum sctp_scope { 3281da177e4SLinus Torvalds SCTP_SCOPE_GLOBAL, /* IPv4 global addresses */ 3291da177e4SLinus Torvalds SCTP_SCOPE_PRIVATE, /* IPv4 private addresses */ 3301da177e4SLinus Torvalds SCTP_SCOPE_LINK, /* IPv4 link local address */ 3311da177e4SLinus Torvalds SCTP_SCOPE_LOOPBACK, /* IPv4 loopback address */ 3321da177e4SLinus Torvalds SCTP_SCOPE_UNUSABLE, /* IPv4 unusable addresses */ 3331c662018SXin Long }; 3341da177e4SLinus Torvalds 335701ef3e6SXin Long enum { 33672388433SBhaskar Dutta SCTP_SCOPE_POLICY_DISABLE, /* Disable IPv4 address scoping */ 33772388433SBhaskar Dutta SCTP_SCOPE_POLICY_ENABLE, /* Enable IPv4 address scoping */ 33872388433SBhaskar Dutta SCTP_SCOPE_POLICY_PRIVATE, /* Follow draft but allow IPv4 private addresses */ 33972388433SBhaskar Dutta SCTP_SCOPE_POLICY_LINK, /* Follow draft but allow IPv4 link local addresses */ 340701ef3e6SXin Long }; 341701ef3e6SXin Long 342701ef3e6SXin Long #define SCTP_SCOPE_POLICY_MAX SCTP_SCOPE_POLICY_LINK 34372388433SBhaskar Dutta 3441da177e4SLinus Torvalds /* Based on IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>, 3451da177e4SLinus Torvalds * SCTP IPv4 unusable addresses: 0.0.0.0/8, 224.0.0.0/4, 198.18.0.0/24, 3461da177e4SLinus Torvalds * 192.88.99.0/24. 3471da177e4SLinus Torvalds * Also, RFC 8.4, non-unicast addresses are not considered valid SCTP 3481da177e4SLinus Torvalds * addresses. 3491da177e4SLinus Torvalds */ 3501da177e4SLinus Torvalds #define IS_IPV4_UNUSABLE_ADDRESS(a) \ 351b5cb2bbcSJoe Perches ((htonl(INADDR_BROADCAST) == a) || \ 352b5cb2bbcSJoe Perches ipv4_is_multicast(a) || \ 353b5cb2bbcSJoe Perches ipv4_is_zeronet(a) || \ 354b5cb2bbcSJoe Perches ipv4_is_test_198(a) || \ 355b5cb2bbcSJoe Perches ipv4_is_anycast_6to4(a)) 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds /* Flags used for the bind address copy functions. */ 358471e39dfSMarcelo Ricardo Leitner #define SCTP_ADDR4_ALLOWED 0x00000001 /* IPv4 address is allowed by 3591da177e4SLinus Torvalds local sock family */ 360471e39dfSMarcelo Ricardo Leitner #define SCTP_ADDR6_ALLOWED 0x00000002 /* IPv6 address is allowed by 361471e39dfSMarcelo Ricardo Leitner local sock family */ 362471e39dfSMarcelo Ricardo Leitner #define SCTP_ADDR4_PEERSUPP 0x00000004 /* IPv4 address is supported by 3631da177e4SLinus Torvalds peer */ 364471e39dfSMarcelo Ricardo Leitner #define SCTP_ADDR6_PEERSUPP 0x00000008 /* IPv6 address is supported by 3651da177e4SLinus Torvalds peer */ 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds /* Reasons to retransmit. */ 368125c2982SXin Long enum sctp_retransmit_reason { 3691da177e4SLinus Torvalds SCTP_RTXR_T3_RTX, 3701da177e4SLinus Torvalds SCTP_RTXR_FAST_RTX, 3711da177e4SLinus Torvalds SCTP_RTXR_PMTUD, 372b6157d8eSVlad Yasevich SCTP_RTXR_T1_RTX, 373125c2982SXin Long }; 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds /* Reasons to lower cwnd. */ 376233e7936SXin Long enum sctp_lower_cwnd { 3771da177e4SLinus Torvalds SCTP_LOWER_CWND_T3_RTX, 3781da177e4SLinus Torvalds SCTP_LOWER_CWND_FAST_RTX, 3791da177e4SLinus Torvalds SCTP_LOWER_CWND_ECNE, 3801da177e4SLinus Torvalds SCTP_LOWER_CWND_INACTIVE, 381233e7936SXin Long }; 3821da177e4SLinus Torvalds 3831f485649SVlad Yasevich 3841f485649SVlad Yasevich /* SCTP-AUTH Necessary constants */ 3851f485649SVlad Yasevich 3861f485649SVlad Yasevich /* SCTP-AUTH, Section 3.3 3871f485649SVlad Yasevich * 3881f485649SVlad Yasevich * The following Table 2 shows the currently defined values for HMAC 3891f485649SVlad Yasevich * identifiers. 3901f485649SVlad Yasevich * 3911f485649SVlad Yasevich * +-----------------+--------------------------+ 3921f485649SVlad Yasevich * | HMAC Identifier | Message Digest Algorithm | 3931f485649SVlad Yasevich * +-----------------+--------------------------+ 3941f485649SVlad Yasevich * | 0 | Reserved | 3951f485649SVlad Yasevich * | 1 | SHA-1 defined in [8] | 3961f485649SVlad Yasevich * | 2 | Reserved | 3971f485649SVlad Yasevich * | 3 | SHA-256 defined in [8] | 3981f485649SVlad Yasevich * +-----------------+--------------------------+ 3991f485649SVlad Yasevich */ 4001f485649SVlad Yasevich enum { 4011f485649SVlad Yasevich SCTP_AUTH_HMAC_ID_RESERVED_0, 4021f485649SVlad Yasevich SCTP_AUTH_HMAC_ID_SHA1, 4031f485649SVlad Yasevich SCTP_AUTH_HMAC_ID_RESERVED_2, 404b7e0fe9fSVlad Yasevich #if defined (CONFIG_CRYPTO_SHA256) || defined (CONFIG_CRYPTO_SHA256_MODULE) 405b7e0fe9fSVlad Yasevich SCTP_AUTH_HMAC_ID_SHA256, 406b7e0fe9fSVlad Yasevich #endif 407b7e0fe9fSVlad Yasevich __SCTP_AUTH_HMAC_MAX 4081f485649SVlad Yasevich }; 4091f485649SVlad Yasevich 410b7e0fe9fSVlad Yasevich #define SCTP_AUTH_HMAC_ID_MAX __SCTP_AUTH_HMAC_MAX - 1 411b7e0fe9fSVlad Yasevich #define SCTP_AUTH_NUM_HMACS __SCTP_AUTH_HMAC_MAX 4121f485649SVlad Yasevich #define SCTP_SHA1_SIG_SIZE 20 4131f485649SVlad Yasevich #define SCTP_SHA256_SIG_SIZE 32 4141f485649SVlad Yasevich 4151f485649SVlad Yasevich /* SCTP-AUTH, Section 3.2 4161f485649SVlad Yasevich * The chunk types for INIT, INIT-ACK, SHUTDOWN-COMPLETE and AUTH chunks 4171f485649SVlad Yasevich * MUST NOT be listed in the CHUNKS parameter 4181f485649SVlad Yasevich */ 4191f485649SVlad Yasevich #define SCTP_NUM_NOAUTH_CHUNKS 4 4201f485649SVlad Yasevich #define SCTP_AUTH_MAX_CHUNKS (SCTP_NUM_CHUNK_TYPES - SCTP_NUM_NOAUTH_CHUNKS) 4211f485649SVlad Yasevich 4221f485649SVlad Yasevich /* SCTP-AUTH Section 6.1 4231f485649SVlad Yasevich * The RANDOM parameter MUST contain a 32 byte random number. 4241f485649SVlad Yasevich */ 4251f485649SVlad Yasevich #define SCTP_AUTH_RANDOM_LENGTH 32 4261f485649SVlad Yasevich 427*d1e462a7SXin Long #define SCTP_PROBE_TIMER_MIN 5000 428*d1e462a7SXin Long 4291da177e4SLinus Torvalds #endif /* __sctp_constants_h__ */ 430