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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/net/sctp
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/net/sctp')
-rw-r--r--include/net/sctp/command.h211
-rw-r--r--include/net/sctp/constants.h432
-rw-r--r--include/net/sctp/sctp.h620
-rw-r--r--include/net/sctp/sm.h442
-rw-r--r--include/net/sctp/structs.h1752
-rw-r--r--include/net/sctp/tsnmap.h207
-rw-r--r--include/net/sctp/ulpevent.h162
-rw-r--r--include/net/sctp/ulpqueue.h92
-rw-r--r--include/net/sctp/user.h589
9 files changed, 4507 insertions, 0 deletions
diff --git a/include/net/sctp/command.h b/include/net/sctp/command.h
new file mode 100644
index 00000000000..ebc5282e6d5
--- /dev/null
+++ b/include/net/sctp/command.h
@@ -0,0 +1,211 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (C) 1999-2001 Cisco, Motorola
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * These are the definitions needed for the command object.
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * the SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to one of the
+ * following email addresses:
+ *
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Ardelle Fan <ardelle.fan@intel.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+
+#ifndef __net_sctp_command_h__
+#define __net_sctp_command_h__
+
+#include <net/sctp/constants.h>
+#include <net/sctp/structs.h>
+
+
+typedef enum {
+ SCTP_CMD_NOP = 0, /* Do nothing. */
+ SCTP_CMD_NEW_ASOC, /* Register a new association. */
+ SCTP_CMD_DELETE_TCB, /* Delete the current association. */
+ SCTP_CMD_NEW_STATE, /* Enter a new state. */
+ SCTP_CMD_REPORT_TSN, /* Record the arrival of a TSN. */
+ SCTP_CMD_GEN_SACK, /* Send a Selective ACK (maybe). */
+ SCTP_CMD_PROCESS_SACK, /* Process an inbound SACK. */
+ SCTP_CMD_GEN_INIT_ACK, /* Generate an INIT ACK chunk. */
+ SCTP_CMD_PEER_INIT, /* Process a INIT from the peer. */
+ SCTP_CMD_GEN_COOKIE_ECHO, /* Generate a COOKIE ECHO chunk. */
+ SCTP_CMD_CHUNK_ULP, /* Send a chunk to the sockets layer. */
+ SCTP_CMD_EVENT_ULP, /* Send a notification to the sockets layer. */
+ SCTP_CMD_REPLY, /* Send a chunk to our peer. */
+ SCTP_CMD_SEND_PKT, /* Send a full packet to our peer. */
+ SCTP_CMD_RETRAN, /* Mark a transport for retransmission. */
+ SCTP_CMD_ECN_CE, /* Do delayed CE processing. */
+ SCTP_CMD_ECN_ECNE, /* Do delayed ECNE processing. */
+ SCTP_CMD_ECN_CWR, /* Do delayed CWR processing. */
+ SCTP_CMD_TIMER_START, /* Start a timer. */
+ SCTP_CMD_TIMER_RESTART, /* Restart a timer. */
+ SCTP_CMD_TIMER_STOP, /* Stop a timer. */
+ SCTP_CMD_COUNTER_RESET, /* Reset a counter. */
+ SCTP_CMD_COUNTER_INC, /* Increment a counter. */
+ SCTP_CMD_INIT_RESTART, /* High level, do init timer work. */
+ SCTP_CMD_INIT_FAILED, /* High level, do init failure work. */
+ SCTP_CMD_REPORT_DUP, /* Report a duplicate TSN. */
+ SCTP_CMD_STRIKE, /* Mark a strike against a transport. */
+ SCTP_CMD_TRANSMIT, /* Transmit the outqueue. */
+ SCTP_CMD_HB_TIMERS_START, /* Start the heartbeat timers. */
+ SCTP_CMD_HB_TIMER_UPDATE, /* Update a heartbeat timers. */
+ SCTP_CMD_HB_TIMERS_STOP, /* Stop the heartbeat timers. */
+ SCTP_CMD_TRANSPORT_RESET, /* Reset the status of a transport. */
+ SCTP_CMD_TRANSPORT_ON, /* Mark the transport as active. */
+ SCTP_CMD_REPORT_ERROR, /* Pass this error back out of the sm. */
+ SCTP_CMD_REPORT_BAD_TAG, /* Verification tags didn't match. */
+ SCTP_CMD_PROCESS_CTSN, /* Sideeffect from shutdown. */
+ SCTP_CMD_ASSOC_FAILED, /* Handle association failure. */
+ SCTP_CMD_DISCARD_PACKET, /* Discard the whole packet. */
+ SCTP_CMD_GEN_SHUTDOWN, /* Generate a SHUTDOWN chunk. */
+ SCTP_CMD_UPDATE_ASSOC, /* Update association information. */
+ SCTP_CMD_PURGE_OUTQUEUE, /* Purge all data waiting to be sent. */
+ SCTP_CMD_SETUP_T2, /* Hi-level, setup T2-shutdown parms. */
+ SCTP_CMD_RTO_PENDING, /* Set transport's rto_pending. */
+ SCTP_CMD_PART_DELIVER, /* Partial data delivery considerations. */
+ SCTP_CMD_RENEGE, /* Renege data on an association. */
+ SCTP_CMD_SETUP_T4, /* ADDIP, setup T4 RTO timer parms. */
+ SCTP_CMD_PROCESS_OPERR, /* Process an ERROR chunk. */
+ SCTP_CMD_REPORT_FWDTSN, /* Report new cumulative TSN Ack. */
+ SCTP_CMD_PROCESS_FWDTSN, /* Skips were reported, so process further. */
+ SCTP_CMD_CLEAR_INIT_TAG, /* Clears association peer's inittag. */
+ SCTP_CMD_DEL_NON_PRIMARY, /* Removes non-primary peer transports. */
+ SCTP_CMD_T3_RTX_TIMERS_STOP, /* Stops T3-rtx pending timers */
+ SCTP_CMD_FORCE_PRIM_RETRAN, /* Forces retrans. over primary path. */
+ SCTP_CMD_LAST
+} sctp_verb_t;
+
+#define SCTP_CMD_MAX (SCTP_CMD_LAST - 1)
+#define SCTP_CMD_NUM_VERBS (SCTP_CMD_MAX + 1)
+
+/* How many commands can you put in an sctp_cmd_seq_t?
+ * This is a rather arbitrary number, ideally derived from a careful
+ * analysis of the state functions, but in reality just taken from
+ * thin air in the hopes othat we don't trigger a kernel panic.
+ */
+#define SCTP_MAX_NUM_COMMANDS 14
+
+typedef union {
+ __s32 i32;
+ __u32 u32;
+ __u16 u16;
+ __u8 u8;
+ int error;
+ sctp_state_t state;
+ sctp_event_timeout_t to;
+ sctp_counter_t counter;
+ void *ptr;
+ struct sctp_chunk *chunk;
+ struct sctp_association *asoc;
+ struct sctp_transport *transport;
+ struct sctp_bind_addr *bp;
+ sctp_init_chunk_t *init;
+ struct sctp_ulpevent *ulpevent;
+ struct sctp_packet *packet;
+ sctp_sackhdr_t *sackh;
+} sctp_arg_t;
+
+/* We are simulating ML type constructors here.
+ *
+ * SCTP_ARG_CONSTRUCTOR(NAME, TYPE, ELT) builds a function called
+ * SCTP_NAME() which takes an argument of type TYPE and returns an
+ * sctp_arg_t. It does this by inserting the sole argument into the
+ * ELT union element of a local sctp_arg_t.
+ *
+ * E.g., SCTP_ARG_CONSTRUCTOR(I32, __s32, i32) builds SCTP_I32(arg),
+ * which takes an __s32 and returns a sctp_arg_t containing the
+ * __s32. So, after foo = SCTP_I32(arg), foo.i32 == arg.
+ */
+static inline sctp_arg_t SCTP_NULL(void)
+{
+ sctp_arg_t retval; retval.ptr = NULL; return retval;
+}
+static inline sctp_arg_t SCTP_NOFORCE(void)
+{
+ sctp_arg_t retval; retval.i32 = 0; return retval;
+}
+static inline sctp_arg_t SCTP_FORCE(void)
+{
+ sctp_arg_t retval; retval.i32 = 1; return retval;
+}
+
+#define SCTP_ARG_CONSTRUCTOR(name, type, elt) \
+static inline sctp_arg_t \
+SCTP_## name (type arg) \
+{ sctp_arg_t retval; retval.elt = arg; return retval; }
+
+SCTP_ARG_CONSTRUCTOR(I32, __s32, i32)
+SCTP_ARG_CONSTRUCTOR(U32, __u32, u32)
+SCTP_ARG_CONSTRUCTOR(U16, __u16, u16)
+SCTP_ARG_CONSTRUCTOR(U8, __u8, u8)
+SCTP_ARG_CONSTRUCTOR(ERROR, int, error)
+SCTP_ARG_CONSTRUCTOR(STATE, sctp_state_t, state)
+SCTP_ARG_CONSTRUCTOR(COUNTER, sctp_counter_t, counter)
+SCTP_ARG_CONSTRUCTOR(TO, sctp_event_timeout_t, to)
+SCTP_ARG_CONSTRUCTOR(PTR, void *, ptr)
+SCTP_ARG_CONSTRUCTOR(CHUNK, struct sctp_chunk *, chunk)
+SCTP_ARG_CONSTRUCTOR(ASOC, struct sctp_association *, asoc)
+SCTP_ARG_CONSTRUCTOR(TRANSPORT, struct sctp_transport *, transport)
+SCTP_ARG_CONSTRUCTOR(BA, struct sctp_bind_addr *, bp)
+SCTP_ARG_CONSTRUCTOR(PEER_INIT, sctp_init_chunk_t *, init)
+SCTP_ARG_CONSTRUCTOR(ULPEVENT, struct sctp_ulpevent *, ulpevent)
+SCTP_ARG_CONSTRUCTOR(PACKET, struct sctp_packet *, packet)
+SCTP_ARG_CONSTRUCTOR(SACKH, sctp_sackhdr_t *, sackh)
+
+typedef struct {
+ sctp_arg_t obj;
+ sctp_verb_t verb;
+} sctp_cmd_t;
+
+typedef struct {
+ sctp_cmd_t cmds[SCTP_MAX_NUM_COMMANDS];
+ __u8 next_free_slot;
+ __u8 next_cmd;
+} sctp_cmd_seq_t;
+
+
+/* Initialize a block of memory as a command sequence.
+ * Return 0 if the initialization fails.
+ */
+int sctp_init_cmd_seq(sctp_cmd_seq_t *seq);
+
+/* Add a command to an sctp_cmd_seq_t.
+ * Return 0 if the command sequence is full.
+ *
+ * Use the SCTP_* constructors defined by SCTP_ARG_CONSTRUCTOR() above
+ * to wrap data which goes in the obj argument.
+ */
+int sctp_add_cmd(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj);
+
+/* Return the next command structure in an sctp_cmd_seq.
+ * Return NULL at the end of the sequence.
+ */
+sctp_cmd_t *sctp_next_cmd(sctp_cmd_seq_t *seq);
+
+#endif /* __net_sctp_command_h__ */
+
diff --git a/include/net/sctp/constants.h b/include/net/sctp/constants.h
new file mode 100644
index 00000000000..2b76c0f4bab
--- /dev/null
+++ b/include/net/sctp/constants.h
@@ -0,0 +1,432 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Randall Stewart <randall@stewart.chicago.il.us>
+ * Ken Morneau <kmorneau@cisco.com>
+ * Qiaobing Xie <qxie1@motorola.com>
+ * Xingang Guo <xingang.guo@intel.com>
+ * Sridhar Samudrala <samudrala@us.ibm.com>
+ * Daisy Chang <daisyc@us.ibm.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#ifndef __sctp_constants_h__
+#define __sctp_constants_h__
+
+#include <linux/tcp.h> /* For TCP states used in sctp_sock_state_t */
+#include <linux/sctp.h>
+#include <linux/ipv6.h> /* For ipv6hdr. */
+#include <net/sctp/user.h>
+
+/* Value used for stream negotiation. */
+enum { SCTP_MAX_STREAM = 0xffff };
+enum { SCTP_DEFAULT_OUTSTREAMS = 10 };
+enum { SCTP_DEFAULT_INSTREAMS = SCTP_MAX_STREAM };
+
+/* Since CIDs are sparse, we need all four of the following
+ * symbols. CIDs are dense through SCTP_CID_BASE_MAX.
+ */
+#define SCTP_CID_BASE_MAX SCTP_CID_SHUTDOWN_COMPLETE
+#define SCTP_CID_MAX SCTP_CID_ASCONF_ACK
+
+#define SCTP_NUM_BASE_CHUNK_TYPES (SCTP_CID_BASE_MAX + 1)
+#define SCTP_NUM_CHUNK_TYPES (SCTP_NUM_BASE_CHUNKTYPES + 2)
+
+#define SCTP_NUM_ADDIP_CHUNK_TYPES 2
+
+#define SCTP_NUM_PRSCTP_CHUNK_TYPES 1
+
+/* These are the different flavours of event. */
+typedef enum {
+
+ SCTP_EVENT_T_CHUNK = 1,
+ SCTP_EVENT_T_TIMEOUT,
+ SCTP_EVENT_T_OTHER,
+ SCTP_EVENT_T_PRIMITIVE
+
+} sctp_event_t;
+
+#define SCTP_EVENT_T_MAX SCTP_EVENT_T_PRIMITIVE
+#define SCTP_EVENT_T_NUM (SCTP_EVENT_T_MAX + 1)
+
+/* As a convenience for the state machine, we append SCTP_EVENT_* and
+ * SCTP_ULP_* to the list of possible chunks.
+ */
+
+typedef enum {
+ SCTP_EVENT_TIMEOUT_NONE = 0,
+ SCTP_EVENT_TIMEOUT_T1_COOKIE,
+ SCTP_EVENT_TIMEOUT_T1_INIT,
+ SCTP_EVENT_TIMEOUT_T2_SHUTDOWN,
+ SCTP_EVENT_TIMEOUT_T3_RTX,
+ SCTP_EVENT_TIMEOUT_T4_RTO,
+ SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD,
+ SCTP_EVENT_TIMEOUT_HEARTBEAT,
+ SCTP_EVENT_TIMEOUT_SACK,
+ SCTP_EVENT_TIMEOUT_AUTOCLOSE,
+} sctp_event_timeout_t;
+
+#define SCTP_EVENT_TIMEOUT_MAX SCTP_EVENT_TIMEOUT_AUTOCLOSE
+#define SCTP_NUM_TIMEOUT_TYPES (SCTP_EVENT_TIMEOUT_MAX + 1)
+
+typedef enum {
+ SCTP_EVENT_NO_PENDING_TSN = 0,
+ SCTP_EVENT_ICMP_PROTO_UNREACH,
+} sctp_event_other_t;
+
+#define SCTP_EVENT_OTHER_MAX SCTP_EVENT_ICMP_PROTO_UNREACH
+#define SCTP_NUM_OTHER_TYPES (SCTP_EVENT_OTHER_MAX + 1)
+
+/* These are primitive requests from the ULP. */
+typedef enum {
+ SCTP_PRIMITIVE_ASSOCIATE = 0,
+ SCTP_PRIMITIVE_SHUTDOWN,
+ SCTP_PRIMITIVE_ABORT,
+ SCTP_PRIMITIVE_SEND,
+ SCTP_PRIMITIVE_REQUESTHEARTBEAT,
+ SCTP_PRIMITIVE_ASCONF,
+} sctp_event_primitive_t;
+
+#define SCTP_EVENT_PRIMITIVE_MAX SCTP_PRIMITIVE_ASCONF
+#define SCTP_NUM_PRIMITIVE_TYPES (SCTP_EVENT_PRIMITIVE_MAX + 1)
+
+/* We define here a utility type for manipulating subtypes.
+ * The subtype constructors all work like this:
+ *
+ * sctp_subtype_t foo = SCTP_ST_CHUNK(SCTP_CID_INIT);
+ */
+
+typedef union {
+ sctp_cid_t chunk;
+ sctp_event_timeout_t timeout;
+ sctp_event_other_t other;
+ sctp_event_primitive_t primitive;
+} sctp_subtype_t;
+
+#define SCTP_SUBTYPE_CONSTRUCTOR(_name, _type, _elt) \
+static inline sctp_subtype_t \
+SCTP_ST_## _name (_type _arg) \
+{ sctp_subtype_t _retval; _retval._elt = _arg; return _retval; }
+
+SCTP_SUBTYPE_CONSTRUCTOR(CHUNK, sctp_cid_t, chunk)
+SCTP_SUBTYPE_CONSTRUCTOR(TIMEOUT, sctp_event_timeout_t, timeout)
+SCTP_SUBTYPE_CONSTRUCTOR(OTHER, sctp_event_other_t, other)
+SCTP_SUBTYPE_CONSTRUCTOR(PRIMITIVE, sctp_event_primitive_t, primitive)
+
+
+#define sctp_chunk_is_control(a) (a->chunk_hdr->type != SCTP_CID_DATA)
+#define sctp_chunk_is_data(a) (a->chunk_hdr->type == SCTP_CID_DATA)
+
+/* Calculate the actual data size in a data chunk */
+#define SCTP_DATA_SNDSIZE(c) ((int)((unsigned long)(c->chunk_end)\
+ - (unsigned long)(c->chunk_hdr)\
+ - sizeof(sctp_data_chunk_t)))
+
+#define SCTP_MAX_ERROR_CAUSE SCTP_ERROR_NONEXIST_IP
+#define SCTP_NUM_ERROR_CAUSE 10
+
+/* Internal error codes */
+typedef enum {
+
+ SCTP_IERROR_NO_ERROR = 0,
+ SCTP_IERROR_BASE = 1000,
+ SCTP_IERROR_NO_COOKIE,
+ SCTP_IERROR_BAD_SIG,
+ SCTP_IERROR_STALE_COOKIE,
+ SCTP_IERROR_NOMEM,
+ SCTP_IERROR_MALFORMED,
+ SCTP_IERROR_BAD_TAG,
+ SCTP_IERROR_BIG_GAP,
+ SCTP_IERROR_DUP_TSN,
+ SCTP_IERROR_HIGH_TSN,
+ SCTP_IERROR_IGNORE_TSN,
+ SCTP_IERROR_NO_DATA,
+ SCTP_IERROR_BAD_STREAM,
+ SCTP_IERROR_BAD_PORTS,
+
+} sctp_ierror_t;
+
+
+
+/* SCTP state defines for internal state machine */
+typedef enum {
+
+ SCTP_STATE_EMPTY = 0,
+ SCTP_STATE_CLOSED = 1,
+ SCTP_STATE_COOKIE_WAIT = 2,
+ SCTP_STATE_COOKIE_ECHOED = 3,
+ SCTP_STATE_ESTABLISHED = 4,
+ SCTP_STATE_SHUTDOWN_PENDING = 5,
+ SCTP_STATE_SHUTDOWN_SENT = 6,
+ SCTP_STATE_SHUTDOWN_RECEIVED = 7,
+ SCTP_STATE_SHUTDOWN_ACK_SENT = 8,
+
+} sctp_state_t;
+
+#define SCTP_STATE_MAX SCTP_STATE_SHUTDOWN_ACK_SENT
+#define SCTP_STATE_NUM_STATES (SCTP_STATE_MAX + 1)
+
+/* These are values for sk->state.
+ * For a UDP-style SCTP socket, the states are defined as follows
+ * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to
+ * accept new associations, but it can initiate the creation of new ones.
+ * - A socket in SCTP_SS_LISTENING state indicates that it is willing to
+ * accept new associations and can initiate the creation of new ones.
+ * - A socket in SCTP_SS_ESTABLISHED state indicates that it is a peeled off
+ * socket with one association.
+ * For a TCP-style SCTP socket, the states are defined as follows
+ * - A socket in SCTP_SS_CLOSED state indicates that it is not willing to
+ * accept new associations, but it can initiate the creation of new ones.
+ * - A socket in SCTP_SS_LISTENING state indicates that it is willing to
+ * accept new associations, but cannot initiate the creation of new ones.
+ * - A socket in SCTP_SS_ESTABLISHED state indicates that it has a single
+ * association.
+ */
+typedef enum {
+ SCTP_SS_CLOSED = TCP_CLOSE,
+ SCTP_SS_LISTENING = TCP_LISTEN,
+ SCTP_SS_ESTABLISHING = TCP_SYN_SENT,
+ SCTP_SS_ESTABLISHED = TCP_ESTABLISHED,
+ SCTP_SS_DISCONNECTING = TCP_CLOSING,
+} sctp_sock_state_t;
+
+/* These functions map various type to printable names. */
+const char *sctp_cname(const sctp_subtype_t); /* chunk types */
+const char *sctp_oname(const sctp_subtype_t); /* other events */
+const char *sctp_tname(const sctp_subtype_t); /* timeouts */
+const char *sctp_pname(const sctp_subtype_t); /* primitives */
+
+/* This is a table of printable names of sctp_state_t's. */
+extern const char *sctp_state_tbl[], *sctp_evttype_tbl[], *sctp_status_tbl[];
+
+/* Maximum chunk length considering padding requirements. */
+enum { SCTP_MAX_CHUNK_LEN = ((1<<16) - sizeof(__u32)) };
+
+/* Encourage Cookie-Echo bundling by pre-fragmenting chunks a little
+ * harder (until reaching ESTABLISHED state).
+ */
+enum { SCTP_ARBITRARY_COOKIE_ECHO_LEN = 200 };
+
+/* Guess at how big to make the TSN mapping array.
+ * We guarantee that we can handle at least this big a gap between the
+ * cumulative ACK and the highest TSN. In practice, we can often
+ * handle up to twice this value.
+ *
+ * NEVER make this more than 32767 (2^15-1). The Gap Ack Blocks in a
+ * SACK (see section 3.3.4) are only 16 bits, so 2*SCTP_TSN_MAP_SIZE
+ * must be less than 65535 (2^16 - 1), or we will have overflow
+ * problems creating SACK's.
+ */
+#define SCTP_TSN_MAP_SIZE 2048
+#define SCTP_TSN_MAX_GAP 65535
+
+/* We will not record more than this many duplicate TSNs between two
+ * SACKs. The minimum PMTU is 576. Remove all the headers and there
+ * is enough room for 131 duplicate reports. Round down to the
+ * nearest power of 2.
+ */
+enum { SCTP_MIN_PMTU = 576 };
+enum { SCTP_MAX_DUP_TSNS = 16 };
+enum { SCTP_MAX_GABS = 16 };
+
+typedef enum {
+ SCTP_COUNTER_INIT_ERROR,
+} sctp_counter_t;
+
+/* How many counters does an association need? */
+#define SCTP_NUMBER_COUNTERS 5
+
+/* Here we define the default timers. */
+
+/* cookie timer def = ? seconds */
+#define SCTP_DEFAULT_TIMEOUT_T1_COOKIE (3 * HZ)
+
+/* init timer def = 3 seconds */
+#define SCTP_DEFAULT_TIMEOUT_T1_INIT (3 * HZ)
+
+/* shutdown timer def = 300 ms */
+#define SCTP_DEFAULT_TIMEOUT_T2_SHUTDOWN ((300 * HZ) / 1000)
+
+/* 0 seconds + RTO */
+#define SCTP_DEFAULT_TIMEOUT_HEARTBEAT (10 * HZ)
+
+/* recv timer def = 200ms (in usec) */
+#define SCTP_DEFAULT_TIMEOUT_SACK ((200 * HZ) / 1000)
+#define SCTP_DEFAULT_TIMEOUT_SACK_MAX ((500 * HZ) / 1000) /* 500 ms */
+
+/* RTO.Initial - 3 seconds
+ * RTO.Min - 1 second
+ * RTO.Max - 60 seconds
+ * RTO.Alpha - 1/8
+ * RTO.Beta - 1/4
+ */
+#define SCTP_RTO_INITIAL (3 * HZ)
+#define SCTP_RTO_MIN (1 * HZ)
+#define SCTP_RTO_MAX (60 * HZ)
+
+#define SCTP_RTO_ALPHA 3 /* 1/8 when converted to right shifts. */
+#define SCTP_RTO_BETA 2 /* 1/4 when converted to right shifts. */
+
+/* Maximum number of new data packets that can be sent in a burst. */
+#define SCTP_MAX_BURST 4
+
+#define SCTP_CLOCK_GRANULARITY 1 /* 1 jiffy */
+
+#define SCTP_DEF_MAX_INIT 6
+#define SCTP_DEF_MAX_SEND 10
+
+#define SCTP_DEFAULT_COOKIE_LIFE_SEC 60 /* seconds */
+#define SCTP_DEFAULT_COOKIE_LIFE_USEC 0 /* microseconds */
+
+#define SCTP_DEFAULT_MINWINDOW 1500 /* default minimum rwnd size */
+#define SCTP_DEFAULT_MAXWINDOW 65535 /* default rwnd size */
+#define SCTP_DEFAULT_MAXSEGMENT 1500 /* MTU size, this is the limit
+ * to which we will raise the P-MTU.
+ */
+#define SCTP_DEFAULT_MINSEGMENT 512 /* MTU size ... if no mtu disc */
+#define SCTP_HOW_MANY_SECRETS 2 /* How many secrets I keep */
+#define SCTP_HOW_LONG_COOKIE_LIVE 3600 /* How many seconds the current
+ * secret will live?
+ */
+#define SCTP_SECRET_SIZE 32 /* Number of octets in a 256 bits. */
+
+#define SCTP_SIGNATURE_SIZE 20 /* size of a SLA-1 signature */
+
+#define SCTP_COOKIE_MULTIPLE 32 /* Pad out our cookie to make our hash
+ * functions simpler to write.
+ */
+
+#if defined (CONFIG_SCTP_HMAC_MD5)
+#define SCTP_COOKIE_HMAC_ALG "md5"
+#elif defined (CONFIG_SCTP_HMAC_SHA1)
+#define SCTP_COOKIE_HMAC_ALG "sha1"
+#else
+#define SCTP_COOKIE_HMAC_ALG NULL
+#endif
+
+/* These return values describe the success or failure of a number of
+ * routines which form the lower interface to SCTP_outqueue.
+ */
+typedef enum {
+ SCTP_XMIT_OK,
+ SCTP_XMIT_PMTU_FULL,
+ SCTP_XMIT_RWND_FULL,
+ SCTP_XMIT_NAGLE_DELAY,
+} sctp_xmit_t;
+
+/* These are the commands for manipulating transports. */
+typedef enum {
+ SCTP_TRANSPORT_UP,
+ SCTP_TRANSPORT_DOWN,
+} sctp_transport_cmd_t;
+
+/* These are the address scopes defined mainly for IPv4 addresses
+ * based on draft of SCTP IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>.
+ * These scopes are hopefully generic enough to be used on scoping both
+ * IPv4 and IPv6 addresses in SCTP.
+ * At this point, the IPv6 scopes will be mapped to these internal scopes
+ * as much as possible.
+ */
+typedef enum {
+ SCTP_SCOPE_GLOBAL, /* IPv4 global addresses */
+ SCTP_SCOPE_PRIVATE, /* IPv4 private addresses */
+ SCTP_SCOPE_LINK, /* IPv4 link local address */
+ SCTP_SCOPE_LOOPBACK, /* IPv4 loopback address */
+ SCTP_SCOPE_UNUSABLE, /* IPv4 unusable addresses */
+} sctp_scope_t;
+
+/* Based on IPv4 scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>,
+ * SCTP IPv4 unusable addresses: 0.0.0.0/8, 224.0.0.0/4, 198.18.0.0/24,
+ * 192.88.99.0/24.
+ * Also, RFC 8.4, non-unicast addresses are not considered valid SCTP
+ * addresses.
+ */
+#define IS_IPV4_UNUSABLE_ADDRESS(a) \
+ ((INADDR_BROADCAST == *a) || \
+ (MULTICAST(*a)) || \
+ (((unsigned char *)(a))[0] == 0) || \
+ ((((unsigned char *)(a))[0] == 198) && \
+ (((unsigned char *)(a))[1] == 18) && \
+ (((unsigned char *)(a))[2] == 0)) || \
+ ((((unsigned char *)(a))[0] == 192) && \
+ (((unsigned char *)(a))[1] == 88) && \
+ (((unsigned char *)(a))[2] == 99)))
+
+/* IPv4 Link-local addresses: 169.254.0.0/16. */
+#define IS_IPV4_LINK_ADDRESS(a) \
+ ((((unsigned char *)(a))[0] == 169) && \
+ (((unsigned char *)(a))[1] == 254))
+
+/* RFC 1918 "Address Allocation for Private Internets" defines the IPv4
+ * private address space as the following:
+ *
+ * 10.0.0.0 - 10.255.255.255 (10/8 prefix)
+ * 172.16.0.0.0 - 172.31.255.255 (172.16/12 prefix)
+ * 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
+ */
+#define IS_IPV4_PRIVATE_ADDRESS(a) \
+ ((((unsigned char *)(a))[0] == 10) || \
+ ((((unsigned char *)(a))[0] == 172) && \
+ (((unsigned char *)(a))[1] >= 16) && \
+ (((unsigned char *)(a))[1] < 32)) || \
+ ((((unsigned char *)(a))[0] == 192) && \
+ (((unsigned char *)(a))[1] == 168)))
+
+/* Flags used for the bind address copy functions. */
+#define SCTP_ADDR6_ALLOWED 0x00000001 /* IPv6 address is allowed by
+ local sock family */
+#define SCTP_ADDR4_PEERSUPP 0x00000002 /* IPv4 address is supported by
+ peer */
+#define SCTP_ADDR6_PEERSUPP 0x00000004 /* IPv6 address is supported by
+ peer */
+
+/* Reasons to retransmit. */
+typedef enum {
+ SCTP_RTXR_T3_RTX,
+ SCTP_RTXR_FAST_RTX,
+ SCTP_RTXR_PMTUD,
+} sctp_retransmit_reason_t;
+
+/* Reasons to lower cwnd. */
+typedef enum {
+ SCTP_LOWER_CWND_T3_RTX,
+ SCTP_LOWER_CWND_FAST_RTX,
+ SCTP_LOWER_CWND_ECNE,
+ SCTP_LOWER_CWND_INACTIVE,
+} sctp_lower_cwnd_t;
+
+#endif /* __sctp_constants_h__ */
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
new file mode 100644
index 00000000000..960abfa48d6
--- /dev/null
+++ b/include/net/sctp/sctp.h
@@ -0,0 +1,620 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001-2003 Intel Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * The base lksctp header.
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Xingang Guo <xingang.guo@intel.com>
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * Daisy Chang <daisyc@us.ibm.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ * Ardelle Fan <ardelle.fan@intel.com>
+ * Ryan Layer <rmlayer@us.ibm.com>
+ * Kevin Gao <kevin.gao@intel.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#ifndef __net_sctp_h__
+#define __net_sctp_h__
+
+/* Header Strategy.
+ * Start getting some control over the header file depencies:
+ * includes
+ * constants
+ * structs
+ * prototypes
+ * macros, externs, and inlines
+ *
+ * Move test_frame specific items out of the kernel headers
+ * and into the test frame headers. This is not perfect in any sense
+ * and will continue to evolve.
+ */
+
+
+#include <linux/config.h>
+
+#ifdef TEST_FRAME
+#undef CONFIG_PROC_FS
+#undef CONFIG_SCTP_DBG_OBJCNT
+#undef CONFIG_SYSCTL
+#endif /* TEST_FRAME */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <linux/tty.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/jiffies.h>
+#include <linux/idr.h>
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#endif
+
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <net/sock.h>
+#include <net/snmp.h>
+#include <net/sctp/structs.h>
+#include <net/sctp/constants.h>
+
+
+/* Set SCTP_DEBUG flag via config if not already set. */
+#ifndef SCTP_DEBUG
+#ifdef CONFIG_SCTP_DBG_MSG
+#define SCTP_DEBUG 1
+#else
+#define SCTP_DEBUG 0
+#endif /* CONFIG_SCTP_DBG */
+#endif /* SCTP_DEBUG */
+
+#ifdef CONFIG_IP_SCTP_MODULE
+#define SCTP_PROTOSW_FLAG 0
+#else /* static! */
+#define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
+#endif
+
+
+/* Certain internal static functions need to be exported when
+ * compiled into the test frame.
+ */
+#ifndef SCTP_STATIC
+#define SCTP_STATIC static
+#endif
+
+/*
+ * Function declarations.
+ */
+
+/*
+ * sctp/protocol.c
+ */
+extern struct sock *sctp_get_ctl_sock(void);
+extern int sctp_copy_local_addr_list(struct sctp_bind_addr *,
+ sctp_scope_t, int gfp, int flags);
+extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family);
+extern int sctp_register_pf(struct sctp_pf *, sa_family_t);
+
+/*
+ * sctp/socket.c
+ */
+int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
+int sctp_inet_listen(struct socket *sock, int backlog);
+void sctp_write_space(struct sock *sk);
+unsigned int sctp_poll(struct file *file, struct socket *sock,
+ poll_table *wait);
+
+/*
+ * sctp/primitive.c
+ */
+int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg);
+int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg);
+int sctp_primitive_ABORT(struct sctp_association *, void *arg);
+int sctp_primitive_SEND(struct sctp_association *, void *arg);
+int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg);
+int sctp_primitive_ASCONF(struct sctp_association *, void *arg);
+
+/*
+ * sctp/crc32c.c
+ */
+__u32 sctp_start_cksum(__u8 *ptr, __u16 count);
+__u32 sctp_update_cksum(__u8 *ptr, __u16 count, __u32 cksum);
+__u32 sctp_end_cksum(__u32 cksum);
+__u32 sctp_update_copy_cksum(__u8 *, __u8 *, __u16 count, __u32 cksum);
+
+/*
+ * sctp/input.c
+ */
+int sctp_rcv(struct sk_buff *skb);
+void sctp_v4_err(struct sk_buff *skb, u32 info);
+void sctp_hash_established(struct sctp_association *);
+void sctp_unhash_established(struct sctp_association *);
+void sctp_hash_endpoint(struct sctp_endpoint *);
+void sctp_unhash_endpoint(struct sctp_endpoint *);
+struct sock *sctp_err_lookup(int family, struct sk_buff *,
+ struct sctphdr *, struct sctp_endpoint **,
+ struct sctp_association **,
+ struct sctp_transport **);
+void sctp_err_finish(struct sock *, struct sctp_endpoint *,
+ struct sctp_association *);
+void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
+ struct sctp_transport *t, __u32 pmtu);
+void sctp_icmp_proto_unreachable(struct sock *sk,
+ struct sctp_endpoint *ep,
+ struct sctp_association *asoc,
+ struct sctp_transport *t);
+
+/*
+ * Section: Macros, externs, and inlines
+ */
+
+
+#ifdef TEST_FRAME
+#include <test_frame.h>
+#else
+
+/* spin lock wrappers. */
+#define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags)
+#define sctp_spin_unlock_irqrestore(lock, flags) \
+ spin_unlock_irqrestore(lock, flags)
+#define sctp_local_bh_disable() local_bh_disable()
+#define sctp_local_bh_enable() local_bh_enable()
+#define sctp_spin_lock(lock) spin_lock(lock)
+#define sctp_spin_unlock(lock) spin_unlock(lock)
+#define sctp_write_lock(lock) write_lock(lock)
+#define sctp_write_unlock(lock) write_unlock(lock)
+#define sctp_read_lock(lock) read_lock(lock)
+#define sctp_read_unlock(lock) read_unlock(lock)
+
+/* sock lock wrappers. */
+#define sctp_lock_sock(sk) lock_sock(sk)
+#define sctp_release_sock(sk) release_sock(sk)
+#define sctp_bh_lock_sock(sk) bh_lock_sock(sk)
+#define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk)
+#define SCTP_SOCK_SLEEP_PRE(sk) SOCK_SLEEP_PRE(sk)
+#define SCTP_SOCK_SLEEP_POST(sk) SOCK_SLEEP_POST(sk)
+
+/* SCTP SNMP MIB stats handlers */
+DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics);
+#define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field)
+#define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field)
+#define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field)
+#define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field)
+
+#endif /* !TEST_FRAME */
+
+
+/* Print debugging messages. */
+#if SCTP_DEBUG
+extern int sctp_debug_flag;
+#define SCTP_DEBUG_PRINTK(whatever...) \
+ ((void) (sctp_debug_flag && printk(KERN_DEBUG whatever)))
+#define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
+#define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
+
+#define SCTP_ASSERT(expr, str, func) \
+ if (!(expr)) { \
+ SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \
+ str, (#expr), __FILE__, __FUNCTION__, __LINE__); \
+ func; \
+ }
+
+#else /* SCTP_DEBUG */
+
+#define SCTP_DEBUG_PRINTK(whatever...)
+#define SCTP_ENABLE_DEBUG
+#define SCTP_DISABLE_DEBUG
+#define SCTP_ASSERT(expr, str, func)
+
+#endif /* SCTP_DEBUG */
+
+
+/*
+ * Macros for keeping a global reference of object allocations.
+ */
+#ifdef CONFIG_SCTP_DBG_OBJCNT
+
+extern atomic_t sctp_dbg_objcnt_sock;
+extern atomic_t sctp_dbg_objcnt_ep;
+extern atomic_t sctp_dbg_objcnt_assoc;
+extern atomic_t sctp_dbg_objcnt_transport;
+extern atomic_t sctp_dbg_objcnt_chunk;
+extern atomic_t sctp_dbg_objcnt_bind_addr;
+extern atomic_t sctp_dbg_objcnt_bind_bucket;
+extern atomic_t sctp_dbg_objcnt_addr;
+extern atomic_t sctp_dbg_objcnt_ssnmap;
+extern atomic_t sctp_dbg_objcnt_datamsg;
+
+/* Macros to atomically increment/decrement objcnt counters. */
+#define SCTP_DBG_OBJCNT_INC(name) \
+atomic_inc(&sctp_dbg_objcnt_## name)
+#define SCTP_DBG_OBJCNT_DEC(name) \
+atomic_dec(&sctp_dbg_objcnt_## name)
+#define SCTP_DBG_OBJCNT(name) \
+atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
+
+/* Macro to help create new entries in in the global array of
+ * objcnt counters.
+ */
+#define SCTP_DBG_OBJCNT_ENTRY(name) \
+{.label= #name, .counter= &sctp_dbg_objcnt_## name}
+
+void sctp_dbg_objcnt_init(void);
+void sctp_dbg_objcnt_exit(void);
+
+#else
+
+#define SCTP_DBG_OBJCNT_INC(name)
+#define SCTP_DBG_OBJCNT_DEC(name)
+
+static inline void sctp_dbg_objcnt_init(void) { return; }
+static inline void sctp_dbg_objcnt_exit(void) { return; }
+
+#endif /* CONFIG_SCTP_DBG_OBJCOUNT */
+
+#if defined CONFIG_SYSCTL
+void sctp_sysctl_register(void);
+void sctp_sysctl_unregister(void);
+#else
+static inline void sctp_sysctl_register(void) { return; }
+static inline void sctp_sysctl_unregister(void) { return; }
+static inline int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context) {
+ return -ENOSYS;
+}
+#endif
+
+/* Size of Supported Address Parameter for 'x' address types. */
+#define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+int sctp_v6_init(void);
+void sctp_v6_exit(void);
+
+#else /* #ifdef defined(CONFIG_IPV6) */
+
+static inline int sctp_v6_init(void) { return 0; }
+static inline void sctp_v6_exit(void) { return; }
+
+#endif /* #if defined(CONFIG_IPV6) */
+
+/* Some wrappers, in case crypto not available. */
+#if defined (CONFIG_CRYPTO_HMAC)
+#define sctp_crypto_alloc_tfm crypto_alloc_tfm
+#define sctp_crypto_free_tfm crypto_free_tfm
+#define sctp_crypto_hmac crypto_hmac
+#else
+#define sctp_crypto_alloc_tfm(x...) NULL
+#define sctp_crypto_free_tfm(x...)
+#define sctp_crypto_hmac(x...)
+#endif
+
+
+/* Map an association to an assoc_id. */
+static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
+{
+ return (asoc?asoc->assoc_id:0);
+}
+
+/* Look up the association by its id. */
+struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
+
+
+/* A macro to walk a list of skbs. */
+#define sctp_skb_for_each(pos, head, tmp) \
+for (pos = (head)->next;\
+ tmp = (pos)->next, pos != ((struct sk_buff *)(head));\
+ pos = tmp)
+
+
+/* A helper to append an entire skb list (list) to another (head). */
+static inline void sctp_skb_list_tail(struct sk_buff_head *list,
+ struct sk_buff_head *head)
+{
+ unsigned long flags;
+
+ sctp_spin_lock_irqsave(&head->lock, flags);
+ sctp_spin_lock(&list->lock);
+
+ list_splice((struct list_head *)list, (struct list_head *)head->prev);
+
+ head->qlen += list->qlen;
+ list->qlen = 0;
+
+ sctp_spin_unlock(&list->lock);
+ sctp_spin_unlock_irqrestore(&head->lock, flags);
+}
+
+/**
+ * sctp_list_dequeue - remove from the head of the queue
+ * @list: list to dequeue from
+ *
+ * Remove the head of the list. The head item is
+ * returned or %NULL if the list is empty.
+ */
+
+static inline struct list_head *sctp_list_dequeue(struct list_head *list)
+{
+ struct list_head *result = NULL;
+
+ if (list->next != list) {
+ result = list->next;
+ list->next = result->next;
+ list->next->prev = list;
+ INIT_LIST_HEAD(result);
+ }
+ return result;
+}
+
+/* Tests if the list has one and only one entry. */
+static inline int sctp_list_single_entry(struct list_head *head)
+{
+ return ((head->next != head) && (head->next == head->prev));
+}
+
+/* Calculate the size (in bytes) occupied by the data of an iovec. */
+static inline size_t get_user_iov_size(struct iovec *iov, int iovlen)
+{
+ size_t retval = 0;
+
+ for (; iovlen > 0; --iovlen) {
+ retval += iov->iov_len;
+ iov++;
+ }
+
+ return retval;
+}
+
+/* Generate a random jitter in the range of -50% ~ +50% of input RTO. */
+static inline __s32 sctp_jitter(__u32 rto)
+{
+ static __u32 sctp_rand;
+ __s32 ret;
+
+ /* Avoid divide by zero. */
+ if (!rto)
+ rto = 1;
+
+ sctp_rand += jiffies;
+ sctp_rand ^= (sctp_rand << 12);
+ sctp_rand ^= (sctp_rand >> 20);
+
+ /* Choose random number from 0 to rto, then move to -50% ~ +50%
+ * of rto.
+ */
+ ret = sctp_rand % rto - (rto >> 1);
+ return ret;
+}
+
+/* Break down data chunks at this point. */
+static inline int sctp_frag_point(const struct sctp_sock *sp, int pmtu)
+{
+ int frag = pmtu;
+
+ frag -= sp->pf->af->net_header_len;
+ frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk);
+
+ if (sp->user_frag)
+ frag = min_t(int, frag, sp->user_frag);
+
+ frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN);
+
+ return frag;
+}
+
+/* Walk through a list of TLV parameters. Don't trust the
+ * individual parameter lengths and instead depend on
+ * the chunk length to indicate when to stop. Make sure
+ * there is room for a param header too.
+ */
+#define sctp_walk_params(pos, chunk, member)\
+_sctp_walk_params((pos), (chunk), WORD_ROUND(ntohs((chunk)->chunk_hdr.length)), member)
+
+#define _sctp_walk_params(pos, chunk, end, member)\
+for (pos.v = chunk->member;\
+ pos.v <= (void *)chunk + end - sizeof(sctp_paramhdr_t) &&\
+ pos.v <= (void *)chunk + end - WORD_ROUND(ntohs(pos.p->length)) &&\
+ ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\
+ pos.v += WORD_ROUND(ntohs(pos.p->length)))
+
+#define sctp_walk_errors(err, chunk_hdr)\
+_sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
+
+#define _sctp_walk_errors(err, chunk_hdr, end)\
+for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
+ sizeof(sctp_chunkhdr_t));\
+ (void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\
+ (void *)err <= (void *)chunk_hdr + end - WORD_ROUND(ntohs(err->length)) &&\
+ ntohs(err->length) >= sizeof(sctp_errhdr_t); \
+ err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length))))
+
+#define sctp_walk_fwdtsn(pos, chunk)\
+_sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
+
+#define _sctp_walk_fwdtsn(pos, chunk, end)\
+for (pos = chunk->subh.fwdtsn_hdr->skip;\
+ (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
+ pos++)
+
+/* Round an int up to the next multiple of 4. */
+#define WORD_ROUND(s) (((s)+3)&~3)
+
+/* Make a new instance of type. */
+#define t_new(type, flags) (type *)kmalloc(sizeof(type), flags)
+
+/* Compare two timevals. */
+#define tv_lt(s, t) \
+ (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
+
+/* Add tv1 to tv2. */
+#define TIMEVAL_ADD(tv1, tv2) \
+({ \
+ suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
+ time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
+\
+ if (usecs >= 1000000) { \
+ usecs -= 1000000; \
+ secs++; \
+ } \
+ (tv2).tv_sec = secs; \
+ (tv2).tv_usec = usecs; \
+})
+
+/* External references. */
+
+extern struct proto sctp_prot;
+extern struct proto sctpv6_prot;
+extern struct proc_dir_entry *proc_net_sctp;
+void sctp_put_port(struct sock *sk);
+
+extern struct idr sctp_assocs_id;
+extern spinlock_t sctp_assocs_id_lock;
+
+/* Static inline functions. */
+
+/* Convert from an IP version number to an Address Family symbol. */
+static inline int ipver2af(__u8 ipver)
+{
+ switch (ipver) {
+ case 4:
+ return AF_INET;
+ case 6:
+ return AF_INET6;
+ default:
+ return 0;
+ };
+}
+
+/* Convert from an address parameter type to an address family. */
+static inline int param_type2af(__u16 type)
+{
+ switch (type) {
+ case SCTP_PARAM_IPV4_ADDRESS:
+ return AF_INET;
+ case SCTP_PARAM_IPV6_ADDRESS:
+ return AF_INET6;
+ default:
+ return 0;
+ };
+}
+
+/* Perform some sanity checks. */
+static inline int sctp_sanity_check(void)
+{
+ SCTP_ASSERT(sizeof(struct sctp_ulpevent) <=
+ sizeof(((struct sk_buff *)0)->cb),
+ "SCTP: ulpevent does not fit in skb!\n", return 0);
+
+ return 1;
+}
+
+/* Warning: The following hash functions assume a power of two 'size'. */
+/* This is the hash function for the SCTP port hash table. */
+static inline int sctp_phashfn(__u16 lport)
+{
+ return (lport & (sctp_port_hashsize - 1));
+}
+
+/* This is the hash function for the endpoint hash table. */
+static inline int sctp_ep_hashfn(__u16 lport)
+{
+ return (lport & (sctp_ep_hashsize - 1));
+}
+
+/* This is the hash function for the association hash table. */
+static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
+{
+ int h = (lport << 16) + rport;
+ h ^= h>>8;
+ return (h & (sctp_assoc_hashsize - 1));
+}
+
+/* This is the hash function for the association hash table. This is
+ * not used yet, but could be used as a better hash function when
+ * we have a vtag.
+ */
+static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag)
+{
+ int h = (lport << 16) + rport;
+ h ^= vtag;
+ return (h & (sctp_assoc_hashsize-1));
+}
+
+/* Is a socket of this style? */
+#define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
+static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style)
+{
+ return sctp_sk(sk)->type == style;
+}
+
+/* Is the association in this state? */
+#define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
+static inline int __sctp_state(const struct sctp_association *asoc,
+ sctp_state_t state)
+{
+ return asoc->state == state;
+}
+
+/* Is the socket in this state? */
+#define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
+static inline int __sctp_sstate(const struct sock *sk, sctp_sock_state_t state)
+{
+ return sk->sk_state == state;
+}
+
+/* Map v4-mapped v6 address back to v4 address */
+static inline void sctp_v6_map_v4(union sctp_addr *addr)
+{
+ addr->v4.sin_family = AF_INET;
+ addr->v4.sin_port = addr->v6.sin6_port;
+ addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3];
+}
+
+/* Map v4 address to v4-mapped v6 address */
+static inline void sctp_v4_map_v6(union sctp_addr *addr)
+{
+ addr->v6.sin6_family = AF_INET6;
+ addr->v6.sin6_port = addr->v4.sin_port;
+ addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
+ addr->v6.sin6_addr.s6_addr32[0] = 0;
+ addr->v6.sin6_addr.s6_addr32[1] = 0;
+ addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff);
+}
+
+#endif /* __net_sctp_h__ */
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
new file mode 100644
index 00000000000..5576db56324
--- /dev/null
+++ b/include/net/sctp/sm.h
@@ -0,0 +1,442 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * These are definitions needed by the state machine.
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email addresses:
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Xingang Guo <xingang.guo@intel.com>
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * Dajiang Zhang <dajiang.zhang@nokia.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ * Daisy Chang <daisyc@us.ibm.com>
+ * Ardelle Fan <ardelle.fan@intel.com>
+ * Kevin Gao <kevin.gao@intel.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <net/sctp/command.h>
+#include <net/sctp/sctp.h>
+
+#ifndef __sctp_sm_h__
+#define __sctp_sm_h__
+
+/*
+ * Possible values for the disposition are:
+ */
+typedef enum {
+ SCTP_DISPOSITION_DISCARD, /* No further processing. */
+ SCTP_DISPOSITION_CONSUME, /* Process return values normally. */
+ SCTP_DISPOSITION_NOMEM, /* We ran out of memory--recover. */
+ SCTP_DISPOSITION_DELETE_TCB, /* Close the association. */
+ SCTP_DISPOSITION_ABORT, /* Close the association NOW. */
+ SCTP_DISPOSITION_VIOLATION, /* The peer is misbehaving. */
+ SCTP_DISPOSITION_NOT_IMPL, /* This entry is not implemented. */
+ SCTP_DISPOSITION_ERROR, /* This is plain old user error. */
+ SCTP_DISPOSITION_BUG, /* This is a bug. */
+} sctp_disposition_t;
+
+typedef struct {
+ int name;
+ int action;
+} sctp_sm_command_t;
+
+typedef sctp_disposition_t (sctp_state_fn_t) (const struct sctp_endpoint *,
+ const struct sctp_association *,
+ const sctp_subtype_t type,
+ void *arg,
+ sctp_cmd_seq_t *);
+typedef void (sctp_timer_event_t) (unsigned long);
+typedef struct {
+ sctp_state_fn_t *fn;
+ const char *name;
+} sctp_sm_table_entry_t;
+
+/* A naming convention of "sctp_sf_xxx" applies to all the state functions
+ * currently in use.
+ */
+
+/* Prototypes for generic state functions. */
+sctp_state_fn_t sctp_sf_not_impl;
+sctp_state_fn_t sctp_sf_bug;
+
+/* Prototypes for gener timer state functions. */
+sctp_state_fn_t sctp_sf_timer_ignore;
+
+/* Prototypes for chunk state functions. */
+sctp_state_fn_t sctp_sf_do_9_1_abort;
+sctp_state_fn_t sctp_sf_cookie_wait_abort;
+sctp_state_fn_t sctp_sf_cookie_echoed_abort;
+sctp_state_fn_t sctp_sf_shutdown_pending_abort;
+sctp_state_fn_t sctp_sf_shutdown_sent_abort;
+sctp_state_fn_t sctp_sf_shutdown_ack_sent_abort;
+sctp_state_fn_t sctp_sf_do_5_1B_init;
+sctp_state_fn_t sctp_sf_do_5_1C_ack;
+sctp_state_fn_t sctp_sf_do_5_1D_ce;
+sctp_state_fn_t sctp_sf_do_5_1E_ca;
+sctp_state_fn_t sctp_sf_do_4_C;
+sctp_state_fn_t sctp_sf_eat_data_6_2;
+sctp_state_fn_t sctp_sf_eat_data_fast_4_4;
+sctp_state_fn_t sctp_sf_eat_sack_6_2;
+sctp_state_fn_t sctp_sf_tabort_8_4_8;
+sctp_state_fn_t sctp_sf_operr_notify;
+sctp_state_fn_t sctp_sf_t1_timer_expire;
+sctp_state_fn_t sctp_sf_t2_timer_expire;
+sctp_state_fn_t sctp_sf_t4_timer_expire;
+sctp_state_fn_t sctp_sf_t5_timer_expire;
+sctp_state_fn_t sctp_sf_sendbeat_8_3;
+sctp_state_fn_t sctp_sf_beat_8_3;
+sctp_state_fn_t sctp_sf_backbeat_8_3;
+sctp_state_fn_t sctp_sf_do_9_2_final;
+sctp_state_fn_t sctp_sf_do_9_2_shutdown;
+sctp_state_fn_t sctp_sf_do_ecn_cwr;
+sctp_state_fn_t sctp_sf_do_ecne;
+sctp_state_fn_t sctp_sf_ootb;
+sctp_state_fn_t sctp_sf_pdiscard;
+sctp_state_fn_t sctp_sf_violation;
+sctp_state_fn_t sctp_sf_violation_chunklen;
+sctp_state_fn_t sctp_sf_discard_chunk;
+sctp_state_fn_t sctp_sf_do_5_2_1_siminit;
+sctp_state_fn_t sctp_sf_do_5_2_2_dupinit;
+sctp_state_fn_t sctp_sf_do_5_2_4_dupcook;
+sctp_state_fn_t sctp_sf_unk_chunk;
+sctp_state_fn_t sctp_sf_do_8_5_1_E_sa;
+sctp_state_fn_t sctp_sf_cookie_echoed_err;
+sctp_state_fn_t sctp_sf_do_asconf;
+sctp_state_fn_t sctp_sf_do_asconf_ack;
+sctp_state_fn_t sctp_sf_do_9_2_reshutack;
+sctp_state_fn_t sctp_sf_eat_fwd_tsn;
+sctp_state_fn_t sctp_sf_eat_fwd_tsn_fast;
+
+/* Prototypes for primitive event state functions. */
+sctp_state_fn_t sctp_sf_do_prm_asoc;
+sctp_state_fn_t sctp_sf_do_prm_send;
+sctp_state_fn_t sctp_sf_do_9_2_prm_shutdown;
+sctp_state_fn_t sctp_sf_cookie_wait_prm_shutdown;
+sctp_state_fn_t sctp_sf_cookie_echoed_prm_shutdown;
+sctp_state_fn_t sctp_sf_do_9_1_prm_abort;
+sctp_state_fn_t sctp_sf_cookie_wait_prm_abort;
+sctp_state_fn_t sctp_sf_cookie_echoed_prm_abort;
+sctp_state_fn_t sctp_sf_shutdown_pending_prm_abort;
+sctp_state_fn_t sctp_sf_shutdown_sent_prm_abort;
+sctp_state_fn_t sctp_sf_shutdown_ack_sent_prm_abort;
+sctp_state_fn_t sctp_sf_error_closed;
+sctp_state_fn_t sctp_sf_error_shutdown;
+sctp_state_fn_t sctp_sf_ignore_primitive;
+sctp_state_fn_t sctp_sf_do_prm_requestheartbeat;
+sctp_state_fn_t sctp_sf_do_prm_asconf;
+
+/* Prototypes for other event state functions. */
+sctp_state_fn_t sctp_sf_do_9_2_start_shutdown;
+sctp_state_fn_t sctp_sf_do_9_2_shutdown_ack;
+sctp_state_fn_t sctp_sf_ignore_other;
+sctp_state_fn_t sctp_sf_cookie_wait_icmp_abort;
+
+/* Prototypes for timeout event state functions. */
+sctp_state_fn_t sctp_sf_do_6_3_3_rtx;
+sctp_state_fn_t sctp_sf_do_6_2_sack;
+sctp_state_fn_t sctp_sf_autoclose_timer_expire;
+
+/* Prototypes for utility support functions. */
+__u8 sctp_get_chunk_type(struct sctp_chunk *chunk);
+const sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t,
+ sctp_state_t,
+ sctp_subtype_t);
+int sctp_chunk_iif(const struct sctp_chunk *);
+struct sctp_association *sctp_make_temp_asoc(const struct sctp_endpoint *,
+ struct sctp_chunk *,
+ int gfp);
+__u32 sctp_generate_verification_tag(void);
+void sctp_populate_tie_tags(__u8 *cookie, __u32 curTag, __u32 hisTag);
+
+/* Prototypes for chunk-building functions. */
+struct sctp_chunk *sctp_make_init(const struct sctp_association *,
+ const struct sctp_bind_addr *,
+ int gfp, int vparam_len);
+struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *,
+ const struct sctp_chunk *,
+ const int gfp,
+ const int unkparam_len);
+struct sctp_chunk *sctp_make_cookie_echo(const struct sctp_association *,
+ const struct sctp_chunk *);
+struct sctp_chunk *sctp_make_cookie_ack(const struct sctp_association *,
+ const struct sctp_chunk *);
+struct sctp_chunk *sctp_make_cwr(const struct sctp_association *,
+ const __u32 lowest_tsn,
+ const struct sctp_chunk *);
+struct sctp_chunk * sctp_make_datafrag_empty(struct sctp_association *,
+ const struct sctp_sndrcvinfo *sinfo,
+ int len, const __u8 flags,
+ __u16 ssn);
+struct sctp_chunk *sctp_make_ecne(const struct sctp_association *,
+ const __u32);
+struct sctp_chunk *sctp_make_sack(const struct sctp_association *);
+struct sctp_chunk *sctp_make_shutdown(const struct sctp_association *asoc,
+ const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_shutdown_ack(const struct sctp_association *asoc,
+ const struct sctp_chunk *);
+struct sctp_chunk *sctp_make_shutdown_complete(const struct sctp_association *,
+ const struct sctp_chunk *);
+void sctp_init_cause(struct sctp_chunk *, __u16 cause, const void *, size_t);
+struct sctp_chunk *sctp_make_abort(const struct sctp_association *,
+ const struct sctp_chunk *,
+ const size_t hint);
+struct sctp_chunk *sctp_make_abort_no_data(const struct sctp_association *,
+ const struct sctp_chunk *,
+ __u32 tsn);
+struct sctp_chunk *sctp_make_abort_user(const struct sctp_association *,
+ const struct sctp_chunk *,
+ const struct msghdr *);
+struct sctp_chunk *sctp_make_abort_violation(const struct sctp_association *,
+ const struct sctp_chunk *,
+ const __u8 *,
+ const size_t );
+struct sctp_chunk *sctp_make_heartbeat(const struct sctp_association *,
+ const struct sctp_transport *,
+ const void *payload,
+ const size_t paylen);
+struct sctp_chunk *sctp_make_heartbeat_ack(const struct sctp_association *,
+ const struct sctp_chunk *,
+ const void *payload,
+ const size_t paylen);
+struct sctp_chunk *sctp_make_op_error(const struct sctp_association *,
+ const struct sctp_chunk *chunk,
+ __u16 cause_code,
+ const void *payload,
+ size_t paylen);
+
+struct sctp_chunk *sctp_make_asconf_update_ip(struct sctp_association *,
+ union sctp_addr *,
+ struct sockaddr *,
+ int, __u16);
+struct sctp_chunk *sctp_make_asconf_set_prim(struct sctp_association *asoc,
+ union sctp_addr *addr);
+struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
+ struct sctp_chunk *asconf);
+int sctp_process_asconf_ack(struct sctp_association *asoc,
+ struct sctp_chunk *asconf_ack);
+struct sctp_chunk *sctp_make_fwdtsn(const struct sctp_association *asoc,
+ __u32 new_cum_tsn, size_t nstreams,
+ struct sctp_fwdtsn_skip *skiplist);
+
+void sctp_chunk_assign_tsn(struct sctp_chunk *);
+void sctp_chunk_assign_ssn(struct sctp_chunk *);
+
+void sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, __u16 error);
+
+/* Prototypes for statetable processing. */
+
+int sctp_do_sm(sctp_event_t event_type, sctp_subtype_t subtype,
+ sctp_state_t state,
+ struct sctp_endpoint *,
+ struct sctp_association *asoc,
+ void *event_arg,
+ int gfp);
+
+/* 2nd level prototypes */
+void sctp_generate_t3_rtx_event(unsigned long peer);
+void sctp_generate_heartbeat_event(unsigned long peer);
+
+void sctp_ootb_pkt_free(struct sctp_packet *);
+
+struct sctp_association *sctp_unpack_cookie(const struct sctp_endpoint *,
+ const struct sctp_association *,
+ struct sctp_chunk *, int gfp, int *err,
+ struct sctp_chunk **err_chk_p);
+int sctp_addip_addr_config(struct sctp_association *, sctp_param_t,
+ struct sockaddr_storage*, int);
+
+/* 3rd level prototypes */
+__u32 sctp_generate_tag(const struct sctp_endpoint *);
+__u32 sctp_generate_tsn(const struct sctp_endpoint *);
+
+/* Extern declarations for major data structures. */
+extern sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES];
+
+
+/* Get the size of a DATA chunk payload. */
+static inline __u16 sctp_data_size(struct sctp_chunk *chunk)
+{
+ __u16 size;
+
+ size = ntohs(chunk->chunk_hdr->length);
+ size -= sizeof(sctp_data_chunk_t);
+
+ return size;
+}
+
+/* Compare two TSNs */
+
+/* RFC 1982 - Serial Number Arithmetic
+ *
+ * 2. Comparison
+ * Then, s1 is said to be equal to s2 if and only if i1 is equal to i2,
+ * in all other cases, s1 is not equal to s2.
+ *
+ * s1 is said to be less than s2 if, and only if, s1 is not equal to s2,
+ * and
+ *
+ * (i1 < i2 and i2 - i1 < 2^(SERIAL_BITS - 1)) or
+ * (i1 > i2 and i1 - i2 > 2^(SERIAL_BITS - 1))
+ *
+ * s1 is said to be greater than s2 if, and only if, s1 is not equal to
+ * s2, and
+ *
+ * (i1 < i2 and i2 - i1 > 2^(SERIAL_BITS - 1)) or
+ * (i1 > i2 and i1 - i2 < 2^(SERIAL_BITS - 1))
+ */
+
+/*
+ * RFC 2960
+ * 1.6 Serial Number Arithmetic
+ *
+ * Comparisons and arithmetic on TSNs in this document SHOULD use Serial
+ * Number Arithmetic as defined in [RFC1982] where SERIAL_BITS = 32.
+ */
+
+enum {
+ TSN_SIGN_BIT = (1<<31)
+};
+
+static inline int TSN_lt(__u32 s, __u32 t)
+{
+ return (((s) - (t)) & TSN_SIGN_BIT);
+}
+
+static inline int TSN_lte(__u32 s, __u32 t)
+{
+ return (((s) == (t)) || (((s) - (t)) & TSN_SIGN_BIT));
+}
+
+/* Compare two SSNs */
+
+/*
+ * RFC 2960
+ * 1.6 Serial Number Arithmetic
+ *
+ * Comparisons and arithmetic on Stream Sequence Numbers in this document
+ * SHOULD use Serial Number Arithmetic as defined in [RFC1982] where
+ * SERIAL_BITS = 16.
+ */
+enum {
+ SSN_SIGN_BIT = (1<<15)
+};
+
+static inline int SSN_lt(__u16 s, __u16 t)
+{
+ return (((s) - (t)) & SSN_SIGN_BIT);
+}
+
+static inline int SSN_lte(__u16 s, __u16 t)
+{
+ return (((s) == (t)) || (((s) - (t)) & SSN_SIGN_BIT));
+}
+
+/*
+ * ADDIP 3.1.1
+ * The valid range of Serial Number is from 0 to 4294967295 (2**32 - 1). Serial
+ * Numbers wrap back to 0 after reaching 4294967295.
+ */
+enum {
+ ADDIP_SERIAL_SIGN_BIT = (1<<31)
+};
+
+static inline int ADDIP_SERIAL_gte(__u16 s, __u16 t)
+{
+ return (((s) == (t)) || (((t) - (s)) & ADDIP_SERIAL_SIGN_BIT));
+}
+
+
+/* Run sctp_add_cmd() generating a BUG() if there is a failure. */
+static inline void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj)
+{
+ if (unlikely(!sctp_add_cmd(seq, verb, obj)))
+ BUG();
+}
+
+/* Check VTAG of the packet matches the sender's own tag. */
+static inline int
+sctp_vtag_verify(const struct sctp_chunk *chunk,
+ const struct sctp_association *asoc)
+{
+ /* RFC 2960 Sec 8.5 When receiving an SCTP packet, the endpoint
+ * MUST ensure that the value in the Verification Tag field of
+ * the received SCTP packet matches its own Tag. If the received
+ * Verification Tag value does not match the receiver's own
+ * tag value, the receiver shall silently discard the packet...
+ */
+ if (ntohl(chunk->sctp_hdr->vtag) == asoc->c.my_vtag)
+ return 1;
+
+ return 0;
+}
+
+/* Check VTAG of the packet matches the sender's own tag OR its peer's
+ * tag and the T bit is set in the Chunk Flags.
+ */
+static inline int
+sctp_vtag_verify_either(const struct sctp_chunk *chunk,
+ const struct sctp_association *asoc)
+{
+ /* RFC 2960 Section 8.5.1, sctpimpguide-06 Section 2.13.2
+ *
+ * B) The receiver of a ABORT shall accept the packet if the
+ * Verification Tag field of the packet matches its own tag OR it
+ * is set to its peer's tag and the T bit is set in the Chunk
+ * Flags. Otherwise, the receiver MUST silently discard the packet
+ * and take no further action.
+ *
+ * (C) The receiver of a SHUTDOWN COMPLETE shall accept the
+ * packet if the Verification Tag field of the packet
+ * matches its own tag OR it is set to its peer's tag and
+ * the T bit is set in the Chunk Flags. Otherwise, the
+ * receiver MUST silently discard the packet and take no
+ * further action....
+ *
+ */
+ if ((ntohl(chunk->sctp_hdr->vtag) == asoc->c.my_vtag) ||
+ (sctp_test_T_bit(chunk) && (ntohl(chunk->sctp_hdr->vtag)
+ == asoc->c.peer_vtag))) {
+ return 1;
+ }
+
+ return 0;
+}
+
+#endif /* __sctp_sm_h__ */
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
new file mode 100644
index 00000000000..7e64cf6bda1
--- /dev/null
+++ b/include/net/sctp/structs.h
@@ -0,0 +1,1752 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email addresses:
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * Randall Stewart <randall@sctp.chicago.il.us>
+ * Ken Morneau <kmorneau@cisco.com>
+ * Qiaobing Xie <qxie1@email.mot.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * Xingang Guo <xingang.guo@intel.com>
+ * Hui Huang <hui.huang@nokia.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ * Daisy Chang <daisyc@us.ibm.com>
+ * Dajiang Zhang <dajiang.zhang@nokia.com>
+ * Ardelle Fan <ardelle.fan@intel.com>
+ * Ryan Layer <rmlayer@us.ibm.com>
+ * Anup Pemmaiah <pemmaiah@cc.usu.edu>
+ * Kevin Gao <kevin.gao@intel.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#ifndef __sctp_structs_h__
+#define __sctp_structs_h__
+
+#include <linux/time.h> /* We get struct timespec. */
+#include <linux/socket.h> /* linux/in.h needs this!! */
+#include <linux/in.h> /* We get struct sockaddr_in. */
+#include <linux/in6.h> /* We get struct in6_addr */
+#include <linux/ipv6.h>
+#include <asm/param.h> /* We get MAXHOSTNAMELEN. */
+#include <asm/atomic.h> /* This gets us atomic counters. */
+#include <linux/skbuff.h> /* We need sk_buff_head. */
+#include <linux/workqueue.h> /* We need tq_struct. */
+#include <linux/sctp.h> /* We need sctp* header structs. */
+
+/* A convenience structure for handling sockaddr structures.
+ * We should wean ourselves off this.
+ */
+union sctp_addr {
+ struct sockaddr_in v4;
+ struct sockaddr_in6 v6;
+ struct sockaddr sa;
+};
+
+/* Forward declarations for data structures. */
+struct sctp_globals;
+struct sctp_endpoint;
+struct sctp_association;
+struct sctp_transport;
+struct sctp_packet;
+struct sctp_chunk;
+struct sctp_inq;
+struct sctp_outq;
+struct sctp_bind_addr;
+struct sctp_ulpq;
+struct sctp_ep_common;
+struct sctp_ssnmap;
+
+
+#include <net/sctp/tsnmap.h>
+#include <net/sctp/ulpevent.h>
+#include <net/sctp/ulpqueue.h>
+
+/* Structures useful for managing bind/connect. */
+
+struct sctp_bind_bucket {
+ unsigned short port;
+ unsigned short fastreuse;
+ struct sctp_bind_bucket *next;
+ struct sctp_bind_bucket **pprev;
+ struct hlist_head owner;
+};
+
+struct sctp_bind_hashbucket {
+ spinlock_t lock;
+ struct sctp_bind_bucket *chain;
+};
+
+/* Used for hashing all associations. */
+struct sctp_hashbucket {
+ rwlock_t lock;
+ struct sctp_ep_common *chain;
+} __attribute__((__aligned__(8)));
+
+
+/* The SCTP globals structure. */
+extern struct sctp_globals {
+ /* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
+ *
+ * The following protocol parameters are RECOMMENDED:
+ *
+ * RTO.Initial - 3 seconds
+ * RTO.Min - 1 second
+ * RTO.Max - 60 seconds
+ * RTO.Alpha - 1/8 (3 when converted to right shifts.)
+ * RTO.Beta - 1/4 (2 when converted to right shifts.)
+ */
+ __u32 rto_initial;
+ __u32 rto_min;
+ __u32 rto_max;
+
+ /* Note: rto_alpha and rto_beta are really defined as inverse
+ * powers of two to facilitate integer operations.
+ */
+ int rto_alpha;
+ int rto_beta;
+
+ /* Max.Burst - 4 */
+ int max_burst;
+
+ /* Valid.Cookie.Life - 60 seconds */
+ int valid_cookie_life;
+
+ /* Whether Cookie Preservative is enabled(1) or not(0) */
+ int cookie_preserve_enable;
+
+ /* Association.Max.Retrans - 10 attempts
+ * Path.Max.Retrans - 5 attempts (per destination address)
+ * Max.Init.Retransmits - 8 attempts
+ */
+ int max_retrans_association;
+ int max_retrans_path;
+ int max_retrans_init;
+
+ /* HB.interval - 30 seconds */
+ int hb_interval;
+
+ /* The following variables are implementation specific. */
+
+ /* Default initialization values to be applied to new associations. */
+ __u16 max_instreams;
+ __u16 max_outstreams;
+
+ /* This is a list of groups of functions for each address
+ * family that we support.
+ */
+ struct list_head address_families;
+
+ /* This is the hash of all endpoints. */
+ int ep_hashsize;
+ struct sctp_hashbucket *ep_hashtable;
+
+ /* This is the hash of all associations. */
+ int assoc_hashsize;
+ struct sctp_hashbucket *assoc_hashtable;
+
+ /* This is the sctp port control hash. */
+ int port_hashsize;
+ int port_rover;
+ spinlock_t port_alloc_lock; /* Protects port_rover. */
+ struct sctp_bind_hashbucket *port_hashtable;
+
+ /* This is the global local address list.
+ * We actively maintain this complete list of interfaces on
+ * the system by catching routing events.
+ *
+ * It is a list of sctp_sockaddr_entry.
+ */
+ struct list_head local_addr_list;
+ spinlock_t local_addr_lock;
+
+ /* Flag to indicate if addip is enabled. */
+ int addip_enable;
+
+ /* Flag to indicate if PR-SCTP is enabled. */
+ int prsctp_enable;
+} sctp_globals;
+
+#define sctp_rto_initial (sctp_globals.rto_initial)
+#define sctp_rto_min (sctp_globals.rto_min)
+#define sctp_rto_max (sctp_globals.rto_max)
+#define sctp_rto_alpha (sctp_globals.rto_alpha)
+#define sctp_rto_beta (sctp_globals.rto_beta)
+#define sctp_max_burst (sctp_globals.max_burst)
+#define sctp_valid_cookie_life (sctp_globals.valid_cookie_life)
+#define sctp_cookie_preserve_enable (sctp_globals.cookie_preserve_enable)
+#define sctp_max_retrans_association (sctp_globals.max_retrans_association)
+#define sctp_max_retrans_path (sctp_globals.max_retrans_path)
+#define sctp_max_retrans_init (sctp_globals.max_retrans_init)
+#define sctp_hb_interval (sctp_globals.hb_interval)
+#define sctp_max_instreams (sctp_globals.max_instreams)
+#define sctp_max_outstreams (sctp_globals.max_outstreams)
+#define sctp_address_families (sctp_globals.address_families)
+#define sctp_ep_hashsize (sctp_globals.ep_hashsize)
+#define sctp_ep_hashtable (sctp_globals.ep_hashtable)
+#define sctp_assoc_hashsize (sctp_globals.assoc_hashsize)
+#define sctp_assoc_hashtable (sctp_globals.assoc_hashtable)
+#define sctp_port_hashsize (sctp_globals.port_hashsize)
+#define sctp_port_rover (sctp_globals.port_rover)
+#define sctp_port_alloc_lock (sctp_globals.port_alloc_lock)
+#define sctp_port_hashtable (sctp_globals.port_hashtable)
+#define sctp_local_addr_list (sctp_globals.local_addr_list)
+#define sctp_local_addr_lock (sctp_globals.local_addr_lock)
+#define sctp_addip_enable (sctp_globals.addip_enable)
+#define sctp_prsctp_enable (sctp_globals.prsctp_enable)
+
+/* SCTP Socket type: UDP or TCP style. */
+typedef enum {
+ SCTP_SOCKET_UDP = 0,
+ SCTP_SOCKET_UDP_HIGH_BANDWIDTH,
+ SCTP_SOCKET_TCP
+} sctp_socket_type_t;
+
+/* Per socket SCTP information. */
+struct sctp_sock {
+ /* inet_sock has to be the first member of sctp_sock */
+ struct inet_sock inet;
+ /* What kind of a socket is this? */
+ sctp_socket_type_t type;
+
+ /* PF_ family specific functions. */
+ struct sctp_pf *pf;
+
+ /* Access to HMAC transform. */
+ struct crypto_tfm *hmac;
+
+ /* What is our base endpointer? */
+ struct sctp_endpoint *ep;
+
+ struct sctp_bind_bucket *bind_hash;
+ /* Various Socket Options. */
+ __u16 default_stream;
+ __u32 default_ppid;
+ __u16 default_flags;
+ __u32 default_context;
+ __u32 default_timetolive;
+
+ struct sctp_initmsg initmsg;
+ struct sctp_rtoinfo rtoinfo;
+ struct sctp_paddrparams paddrparam;
+ struct sctp_event_subscribe subscribe;
+ struct sctp_assocparams assocparams;
+ int user_frag;
+ __u32 autoclose;
+ __u8 nodelay;
+ __u8 disable_fragments;
+ __u8 pd_mode;
+ __u8 v4mapped;
+ __u32 adaption_ind;
+
+ /* Receive to here while partial delivery is in effect. */
+ struct sk_buff_head pd_lobby;
+};
+
+static inline struct sctp_sock *sctp_sk(const struct sock *sk)
+{
+ return (struct sctp_sock *)sk;
+}
+
+static inline struct sock *sctp_opt2sk(const struct sctp_sock *sp)
+{
+ return (struct sock *)sp;
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+struct sctp6_sock {
+ struct sctp_sock sctp;
+ struct ipv6_pinfo inet6;
+};
+#endif /* CONFIG_IPV6 */
+
+
+/* This is our APPLICATION-SPECIFIC state cookie.
+ * THIS IS NOT DICTATED BY THE SPECIFICATION.
+ */
+/* These are the parts of an association which we send in the cookie.
+ * Most of these are straight out of:
+ * RFC2960 12.2 Parameters necessary per association (i.e. the TCB)
+ *
+ */
+
+struct sctp_cookie {
+
+ /* My : Tag expected in every inbound packet and sent
+ * Verification: in the INIT or INIT ACK chunk.
+ * Tag :
+ */
+ __u32 my_vtag;
+
+ /* Peer's : Tag expected in every outbound packet except
+ * Verification: in the INIT chunk.
+ * Tag :
+ */
+ __u32 peer_vtag;
+
+ /* The rest of these are not from the spec, but really need to
+ * be in the cookie.
+ */
+
+ /* My Tie Tag : Assist in discovering a restarting association. */
+ __u32 my_ttag;
+
+ /* Peer's Tie Tag: Assist in discovering a restarting association. */
+ __u32 peer_ttag;
+
+ /* When does this cookie expire? */
+ struct timeval expiration;
+
+ /* Number of inbound/outbound streams which are set
+ * and negotiated during the INIT process.
+ */
+ __u16 sinit_num_ostreams;
+ __u16 sinit_max_instreams;
+
+ /* This is the first sequence number I used. */
+ __u32 initial_tsn;
+
+ /* This holds the originating address of the INIT packet. */
+ union sctp_addr peer_addr;
+
+ /* IG Section 2.35.3
+ * Include the source port of the INIT-ACK
+ */
+ __u16 my_port;
+
+ __u8 prsctp_capable;
+
+ /* Padding for future use */
+ __u8 padding;
+
+ __u32 adaption_ind;
+
+
+ /* This is a shim for my peer's INIT packet, followed by
+ * a copy of the raw address list of the association.
+ * The length of the raw address list is saved in the
+ * raw_addr_list_len field, which will be used at the time when
+ * the association TCB is re-constructed from the cookie.
+ */
+ __u32 raw_addr_list_len;
+ struct sctp_init_chunk peer_init[0];
+};
+
+
+/* The format of our cookie that we send to our peer. */
+struct sctp_signed_cookie {
+ __u8 signature[SCTP_SECRET_SIZE];
+ struct sctp_cookie c;
+};
+
+/* This is another convenience type to allocate memory for address
+ * params for the maximum size and pass such structures around
+ * internally.
+ */
+union sctp_addr_param {
+ struct sctp_ipv4addr_param v4;
+ struct sctp_ipv6addr_param v6;
+};
+
+/* A convenience type to allow walking through the various
+ * parameters and avoid casting all over the place.
+ */
+union sctp_params {
+ void *v;
+ struct sctp_paramhdr *p;
+ struct sctp_cookie_preserve_param *life;
+ struct sctp_hostname_param *dns;
+ struct sctp_cookie_param *cookie;
+ struct sctp_supported_addrs_param *sat;
+ struct sctp_ipv4addr_param *v4;
+ struct sctp_ipv6addr_param *v6;
+ union sctp_addr_param *addr;
+ struct sctp_adaption_ind_param *aind;
+};
+
+/* RFC 2960. Section 3.3.5 Heartbeat.
+ * Heartbeat Information: variable length
+ * The Sender-specific Heartbeat Info field should normally include
+ * information about the sender's current time when this HEARTBEAT
+ * chunk is sent and the destination transport address to which this
+ * HEARTBEAT is sent (see Section 8.3).
+ */
+typedef struct sctp_sender_hb_info {
+ struct sctp_paramhdr param_hdr;
+ union sctp_addr daddr;
+ unsigned long sent_at;
+} __attribute__((packed)) sctp_sender_hb_info_t;
+
+/*
+ * RFC 2960 1.3.2 Sequenced Delivery within Streams
+ *
+ * The term "stream" is used in SCTP to refer to a sequence of user
+ * messages that are to be delivered to the upper-layer protocol in
+ * order with respect to other messages within the same stream. This is
+ * in contrast to its usage in TCP, where it refers to a sequence of
+ * bytes (in this document a byte is assumed to be eight bits).
+ * ...
+ *
+ * This is the structure we use to track both our outbound and inbound
+ * SSN, or Stream Sequence Numbers.
+ */
+
+struct sctp_stream {
+ __u16 *ssn;
+ unsigned int len;
+};
+
+struct sctp_ssnmap {
+ struct sctp_stream in;
+ struct sctp_stream out;
+ int malloced;
+};
+
+struct sctp_ssnmap *sctp_ssnmap_new(__u16 in, __u16 out, int gfp);
+void sctp_ssnmap_free(struct sctp_ssnmap *map);
+void sctp_ssnmap_clear(struct sctp_ssnmap *map);
+
+/* What is the current SSN number for this stream? */
+static inline __u16 sctp_ssn_peek(struct sctp_stream *stream, __u16 id)
+{
+ return stream->ssn[id];
+}
+
+/* Return the next SSN number for this stream. */
+static inline __u16 sctp_ssn_next(struct sctp_stream *stream, __u16 id)
+{
+ return stream->ssn[id]++;
+}
+
+/* Skip over this ssn and all below. */
+static inline void sctp_ssn_skip(struct sctp_stream *stream, __u16 id,
+ __u16 ssn)
+{
+ stream->ssn[id] = ssn+1;
+}
+
+/*
+ * Pointers to address related SCTP functions.
+ * (i.e. things that depend on the address family.)
+ */
+struct sctp_af {
+ int (*sctp_xmit) (struct sk_buff *skb,
+ struct sctp_transport *,
+ int ipfragok);
+ int (*setsockopt) (struct sock *sk,
+ int level,
+ int optname,
+ char __user *optval,
+ int optlen);
+ int (*getsockopt) (struct sock *sk,
+ int level,
+ int optname,
+ char __user *optval,
+ int __user *optlen);
+ struct dst_entry *(*get_dst) (struct sctp_association *asoc,
+ union sctp_addr *daddr,
+ union sctp_addr *saddr);
+ void (*get_saddr) (struct sctp_association *asoc,
+ struct dst_entry *dst,
+ union sctp_addr *daddr,
+ union sctp_addr *saddr);
+ void (*copy_addrlist) (struct list_head *,
+ struct net_device *);
+ void (*dst_saddr) (union sctp_addr *saddr,
+ struct dst_entry *dst,
+ unsigned short port);
+ int (*cmp_addr) (const union sctp_addr *addr1,
+ const union sctp_addr *addr2);
+ void (*addr_copy) (union sctp_addr *dst,
+ union sctp_addr *src);
+ void (*from_skb) (union sctp_addr *,
+ struct sk_buff *skb,
+ int saddr);
+ void (*from_sk) (union sctp_addr *,
+ struct sock *sk);
+ void (*to_sk_saddr) (union sctp_addr *,
+ struct sock *sk);
+ void (*to_sk_daddr) (union sctp_addr *,
+ struct sock *sk);
+ void (*from_addr_param) (union sctp_addr *,
+ union sctp_addr_param *,
+ __u16 port, int iif);
+ int (*to_addr_param) (const union sctp_addr *,
+ union sctp_addr_param *);
+ int (*addr_valid) (union sctp_addr *,
+ struct sctp_sock *);
+ sctp_scope_t (*scope) (union sctp_addr *);
+ void (*inaddr_any) (union sctp_addr *, unsigned short);
+ int (*is_any) (const union sctp_addr *);
+ int (*available) (union sctp_addr *,
+ struct sctp_sock *);
+ int (*skb_iif) (const struct sk_buff *sk);
+ int (*is_ce) (const struct sk_buff *sk);
+ void (*seq_dump_addr)(struct seq_file *seq,
+ union sctp_addr *addr);
+ __u16 net_header_len;
+ int sockaddr_len;
+ sa_family_t sa_family;
+ struct list_head list;
+};
+
+struct sctp_af *sctp_get_af_specific(sa_family_t);
+int sctp_register_af(struct sctp_af *);
+
+/* Protocol family functions. */
+struct sctp_pf {
+ void (*event_msgname)(struct sctp_ulpevent *, char *, int *);
+ void (*skb_msgname) (struct sk_buff *, char *, int *);
+ int (*af_supported) (sa_family_t, struct sctp_sock *);
+ int (*cmp_addr) (const union sctp_addr *,
+ const union sctp_addr *,
+ struct sctp_sock *);
+ int (*bind_verify) (struct sctp_sock *, union sctp_addr *);
+ int (*send_verify) (struct sctp_sock *, union sctp_addr *);
+ int (*supported_addrs)(const struct sctp_sock *, __u16 *);
+ struct sock *(*create_accept_sk) (struct sock *sk,
+ struct sctp_association *asoc);
+ void (*addr_v4map) (struct sctp_sock *, union sctp_addr *);
+ struct sctp_af *af;
+};
+
+
+/* Structure to track chunk fragments that have been acked, but peer
+ * fragments of the same message have not.
+ */
+struct sctp_datamsg {
+ /* Chunks waiting to be submitted to lower layer. */
+ struct list_head chunks;
+ /* Chunks that have been transmitted. */
+ struct list_head track;
+ /* Reference counting. */
+ atomic_t refcnt;
+ /* When is this message no longer interesting to the peer? */
+ unsigned long expires_at;
+ /* Did the messenge fail to send? */
+ int send_error;
+ char send_failed;
+ /* Control whether chunks from this message can be abandoned. */
+ char can_abandon;
+};
+
+struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *,
+ struct sctp_sndrcvinfo *,
+ struct msghdr *, int len);
+void sctp_datamsg_put(struct sctp_datamsg *);
+void sctp_datamsg_free(struct sctp_datamsg *);
+void sctp_datamsg_track(struct sctp_chunk *);
+void sctp_chunk_fail(struct sctp_chunk *, int error);
+int sctp_chunk_abandoned(struct sctp_chunk *);
+
+
+/* RFC2960 1.4 Key Terms
+ *
+ * o Chunk: A unit of information within an SCTP packet, consisting of
+ * a chunk header and chunk-specific content.
+ *
+ * As a matter of convenience, we remember the SCTP common header for
+ * each chunk as well as a few other header pointers...
+ */
+struct sctp_chunk {
+ /* These first three elements MUST PRECISELY match the first
+ * three elements of struct sk_buff. This allows us to reuse
+ * all the skb_* queue management functions.
+ */
+ struct sctp_chunk *next;
+ struct sctp_chunk *prev;
+ struct sk_buff_head *list;
+ atomic_t refcnt;
+
+ /* This is our link to the per-transport transmitted list. */
+ struct list_head transmitted_list;
+
+ /* This field is used by chunks that hold fragmented data.
+ * For the first fragment this is the list that holds the rest of
+ * fragments. For the remaining fragments, this is the link to the
+ * frag_list maintained in the first fragment.
+ */
+ struct list_head frag_list;
+
+ /* This points to the sk_buff containing the actual data. */
+ struct sk_buff *skb;
+
+ /* These are the SCTP headers by reverse order in a packet.
+ * Note that some of these may happen more than once. In that
+ * case, we point at the "current" one, whatever that means
+ * for that level of header.
+ */
+
+ /* We point this at the FIRST TLV parameter to chunk_hdr. */
+ union sctp_params param_hdr;
+ union {
+ __u8 *v;
+ struct sctp_datahdr *data_hdr;
+ struct sctp_inithdr *init_hdr;
+ struct sctp_sackhdr *sack_hdr;
+ struct sctp_heartbeathdr *hb_hdr;
+ struct sctp_sender_hb_info *hbs_hdr;
+ struct sctp_shutdownhdr *shutdown_hdr;
+ struct sctp_signed_cookie *cookie_hdr;
+ struct sctp_ecnehdr *ecne_hdr;
+ struct sctp_cwrhdr *ecn_cwr_hdr;
+ struct sctp_errhdr *err_hdr;
+ struct sctp_addiphdr *addip_hdr;
+ struct sctp_fwdtsn_hdr *fwdtsn_hdr;
+ } subh;
+
+ __u8 *chunk_end;
+
+ struct sctp_chunkhdr *chunk_hdr;
+ struct sctphdr *sctp_hdr;
+
+ /* This needs to be recoverable for SCTP_SEND_FAILED events. */
+ struct sctp_sndrcvinfo sinfo;
+
+ /* Which association does this belong to? */
+ struct sctp_association *asoc;
+
+ /* What endpoint received this chunk? */
+ struct sctp_ep_common *rcvr;
+
+ /* We fill this in if we are calculating RTT. */
+ unsigned long sent_at;
+
+ /* What is the origin IP address for this chunk? */
+ union sctp_addr source;
+ /* Destination address for this chunk. */
+ union sctp_addr dest;
+
+ /* For outbound message, track all fragments for SEND_FAILED. */
+ struct sctp_datamsg *msg;
+
+ /* For an inbound chunk, this tells us where it came from.
+ * For an outbound chunk, it tells us where we'd like it to
+ * go. It is NULL if we have no preference.
+ */
+ struct sctp_transport *transport;
+
+ __u8 rtt_in_progress; /* Is this chunk used for RTT calculation? */
+ __u8 resent; /* Has this chunk ever been retransmitted. */
+ __u8 has_tsn; /* Does this chunk have a TSN yet? */
+ __u8 has_ssn; /* Does this chunk have a SSN yet? */
+ __u8 singleton; /* Was this the only chunk in the packet? */
+ __u8 end_of_packet; /* Was this the last chunk in the packet? */
+ __u8 ecn_ce_done; /* Have we processed the ECN CE bit? */
+ __u8 pdiscard; /* Discard the whole packet now? */
+ __u8 tsn_gap_acked; /* Is this chunk acked by a GAP ACK? */
+ __u8 fast_retransmit; /* Is this chunk fast retransmitted? */
+ __u8 tsn_missing_report; /* Data chunk missing counter. */
+};
+
+void sctp_chunk_hold(struct sctp_chunk *);
+void sctp_chunk_put(struct sctp_chunk *);
+int sctp_user_addto_chunk(struct sctp_chunk *chunk, int off, int len,
+ struct iovec *data);
+void sctp_chunk_free(struct sctp_chunk *);
+void *sctp_addto_chunk(struct sctp_chunk *, int len, const void *data);
+struct sctp_chunk *sctp_chunkify(struct sk_buff *,
+ const struct sctp_association *,
+ struct sock *);
+void sctp_init_addrs(struct sctp_chunk *, union sctp_addr *,
+ union sctp_addr *);
+const union sctp_addr *sctp_source(const struct sctp_chunk *chunk);
+
+/* This is a structure for holding either an IPv6 or an IPv4 address. */
+/* sin_family -- AF_INET or AF_INET6
+ * sin_port -- ordinary port number
+ * sin_addr -- cast to either (struct in_addr) or (struct in6_addr)
+ */
+struct sctp_sockaddr_entry {
+ struct list_head list;
+ union sctp_addr a;
+};
+
+typedef struct sctp_chunk *(sctp_packet_phandler_t)(struct sctp_association *);
+
+/* This structure holds lists of chunks as we are assembling for
+ * transmission.
+ */
+struct sctp_packet {
+ /* These are the SCTP header values (host order) for the packet. */
+ __u16 source_port;
+ __u16 destination_port;
+ __u32 vtag;
+
+ /* This contains the payload chunks. */
+ struct sk_buff_head chunks;
+
+ /* This is the overhead of the sctp and ip headers. */
+ size_t overhead;
+ /* This is the total size of all chunks INCLUDING padding. */
+ size_t size;
+
+ /* The packet is destined for this transport address.
+ * The function we finally use to pass down to the next lower
+ * layer lives in the transport structure.
+ */
+ struct sctp_transport *transport;
+
+ /* This packet contains a COOKIE-ECHO chunk. */
+ char has_cookie_echo;
+
+ /* This packet containsa SACK chunk. */
+ char has_sack;
+
+ /* SCTP cannot fragment this packet. So let ip fragment it. */
+ char ipfragok;
+
+ int malloced;
+};
+
+struct sctp_packet *sctp_packet_init(struct sctp_packet *,
+ struct sctp_transport *,
+ __u16 sport, __u16 dport);
+struct sctp_packet *sctp_packet_config(struct sctp_packet *, __u32 vtag, int);
+sctp_xmit_t sctp_packet_transmit_chunk(struct sctp_packet *,
+ struct sctp_chunk *);
+sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *,
+ struct sctp_chunk *);
+int sctp_packet_transmit(struct sctp_packet *);
+void sctp_packet_free(struct sctp_packet *);
+
+static inline int sctp_packet_empty(struct sctp_packet *packet)
+{
+ return (packet->size == packet->overhead);
+}
+
+/* This represents a remote transport address.
+ * For local transport addresses, we just use union sctp_addr.
+ *
+ * RFC2960 Section 1.4 Key Terms
+ *
+ * o Transport address: A Transport Address is traditionally defined
+ * by Network Layer address, Transport Layer protocol and Transport
+ * Layer port number. In the case of SCTP running over IP, a
+ * transport address is defined by the combination of an IP address
+ * and an SCTP port number (where SCTP is the Transport protocol).
+ *
+ * RFC2960 Section 7.1 SCTP Differences from TCP Congestion control
+ *
+ * o The sender keeps a separate congestion control parameter set for
+ * each of the destination addresses it can send to (not each
+ * source-destination pair but for each destination). The parameters
+ * should decay if the address is not used for a long enough time
+ * period.
+ *
+ */
+struct sctp_transport {
+ /* A list of transports. */
+ struct list_head transports;
+
+ /* Reference counting. */
+ atomic_t refcnt;
+ int dead;
+
+ /* This is the peer's IP address and port. */
+ union sctp_addr ipaddr;
+
+ /* These are the functions we call to handle LLP stuff. */
+ struct sctp_af *af_specific;
+
+ /* Which association do we belong to? */
+ struct sctp_association *asoc;
+
+ /* RFC2960
+ *
+ * 12.3 Per Transport Address Data
+ *
+ * For each destination transport address in the peer's
+ * address list derived from the INIT or INIT ACK chunk, a
+ * number of data elements needs to be maintained including:
+ */
+ __u32 rtt; /* This is the most recent RTT. */
+
+ /* RTO : The current retransmission timeout value. */
+ __u32 rto;
+
+ /* RTTVAR : The current RTT variation. */
+ __u32 rttvar;
+
+ /* SRTT : The current smoothed round trip time. */
+ __u32 srtt;
+
+ /* RTO-Pending : A flag used to track if one of the DATA
+ * chunks sent to this address is currently being
+ * used to compute a RTT. If this flag is 0,
+ * the next DATA chunk sent to this destination
+ * should be used to compute a RTT and this flag
+ * should be set. Every time the RTT
+ * calculation completes (i.e. the DATA chunk
+ * is SACK'd) clear this flag.
+ */
+ int rto_pending;
+
+ /*
+ * These are the congestion stats.
+ */
+ /* cwnd : The current congestion window. */
+ __u32 cwnd; /* This is the actual cwnd. */
+
+ /* ssthresh : The current slow start threshold value. */
+ __u32 ssthresh;
+
+ /* partial : The tracking method for increase of cwnd when in
+ * bytes acked : congestion avoidance mode (see Section 6.2.2)
+ */
+ __u32 partial_bytes_acked;
+
+ /* Data that has been sent, but not acknowledged. */
+ __u32 flight_size;
+
+ /* PMTU : The current known path MTU. */
+ __u32 pmtu;
+
+ /* Destination */
+ struct dst_entry *dst;
+ /* Source address. */
+ union sctp_addr saddr;
+
+ /* When was the last time(in jiffies) that a data packet was sent on
+ * this transport? This is used to adjust the cwnd when the transport
+ * becomes inactive.
+ */
+ unsigned long last_time_used;
+
+ /* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
+ * the destination address every heartbeat interval.
+ */
+ int hb_interval;
+
+ /* When was the last time (in jiffies) that we heard from this
+ * transport? We use this to pick new active and retran paths.
+ */
+ unsigned long last_time_heard;
+
+ /* Last time(in jiffies) when cwnd is reduced due to the congestion
+ * indication based on ECNE chunk.
+ */
+ unsigned long last_time_ecne_reduced;
+
+ /* active : The current active state of this destination,
+ * : i.e. DOWN, UP, etc.
+ */
+ int active;
+
+ /* hb_allowed : The current heartbeat state of this destination,
+ * : i.e. ALLOW-HB, NO-HEARTBEAT, etc.
+ */
+ int hb_allowed;
+
+ /* These are the error stats for this destination. */
+
+ /* Error count : The current error count for this destination. */
+ unsigned short error_count;
+
+ /* This is the max_retrans value for the transport and will
+ * be initialized to proto.max_retrans.path. This can be changed
+ * using SCTP_SET_PEER_ADDR_PARAMS socket option.
+ */
+ int max_retrans;
+
+ /* Per : A timer used by each destination.
+ * Destination :
+ * Timer :
+ *
+ * [Everywhere else in the text this is called T3-rtx. -ed]
+ */
+ struct timer_list T3_rtx_timer;
+
+ /* Heartbeat timer is per destination. */
+ struct timer_list hb_timer;
+
+ /* Since we're using per-destination retransmission timers
+ * (see above), we're also using per-destination "transmitted"
+ * queues. This probably ought to be a private struct
+ * accessible only within the outqueue, but it's not, yet.
+ */
+ struct list_head transmitted;
+
+ /* We build bundle-able packets for this transport here. */
+ struct sctp_packet packet;
+
+ /* This is the list of transports that have chunks to send. */
+ struct list_head send_ready;
+
+ int malloced; /* Is this structure kfree()able? */
+
+ /* State information saved for SFR_CACC algorithm. The key
+ * idea in SFR_CACC is to maintain state at the sender on a
+ * per-destination basis when a changeover happens.
+ * char changeover_active;
+ * char cycling_changeover;
+ * __u32 next_tsn_at_change;
+ * char cacc_saw_newack;
+ */
+ struct {
+ /* An unsigned integer, which stores the next TSN to be
+ * used by the sender, at the moment of changeover.
+ */
+ __u32 next_tsn_at_change;
+
+ /* A flag which indicates the occurrence of a changeover */
+ char changeover_active;
+
+ /* A flag which indicates whether the change of primary is
+ * the first switch to this destination address during an
+ * active switch.
+ */
+ char cycling_changeover;
+
+ /* A temporary flag, which is used during the processing of
+ * a SACK to estimate the causative TSN(s)'s group.
+ */
+ char cacc_saw_newack;
+ } cacc;
+};
+
+struct sctp_transport *sctp_transport_new(const union sctp_addr *, int);
+void sctp_transport_set_owner(struct sctp_transport *,
+ struct sctp_association *);
+void sctp_transport_route(struct sctp_transport *, union sctp_addr *,
+ struct sctp_sock *);
+void sctp_transport_pmtu(struct sctp_transport *);
+void sctp_transport_free(struct sctp_transport *);
+void sctp_transport_reset_timers(struct sctp_transport *);
+void sctp_transport_hold(struct sctp_transport *);
+void sctp_transport_put(struct sctp_transport *);
+void sctp_transport_update_rto(struct sctp_transport *, __u32);
+void sctp_transport_raise_cwnd(struct sctp_transport *, __u32, __u32);
+void sctp_transport_lower_cwnd(struct sctp_transport *, sctp_lower_cwnd_t);
+unsigned long sctp_transport_timeout(struct sctp_transport *);
+
+
+/* This is the structure we use to queue packets as they come into
+ * SCTP. We write packets to it and read chunks from it.
+ */
+struct sctp_inq {
+ /* This is actually a queue of sctp_chunk each
+ * containing a partially decoded packet.
+ */
+ struct sk_buff_head in;
+ /* This is the packet which is currently off the in queue and is
+ * being worked on through the inbound chunk processing.
+ */
+ struct sctp_chunk *in_progress;
+
+ /* This is the delayed task to finish delivering inbound
+ * messages.
+ */
+ struct work_struct immediate;
+
+ int malloced; /* Is this structure kfree()able? */
+};
+
+void sctp_inq_init(struct sctp_inq *);
+void sctp_inq_free(struct sctp_inq *);
+void sctp_inq_push(struct sctp_inq *, struct sctp_chunk *packet);
+struct sctp_chunk *sctp_inq_pop(struct sctp_inq *);
+void sctp_inq_set_th_handler(struct sctp_inq *, void (*)(void *), void *);
+
+/* This is the structure we use to hold outbound chunks. You push
+ * chunks in and they automatically pop out the other end as bundled
+ * packets (it calls (*output_handler)()).
+ *
+ * This structure covers sections 6.3, 6.4, 6.7, 6.8, 6.10, 7., 8.1,
+ * and 8.2 of the v13 draft.
+ *
+ * It handles retransmissions. The connection to the timeout portion
+ * of the state machine is through sctp_..._timeout() and timeout_handler.
+ *
+ * If you feed it SACKs, it will eat them.
+ *
+ * If you give it big chunks, it will fragment them.
+ *
+ * It assigns TSN's to data chunks. This happens at the last possible
+ * instant before transmission.
+ *
+ * When free()'d, it empties itself out via output_handler().
+ */
+struct sctp_outq {
+ struct sctp_association *asoc;
+
+ /* Data pending that has never been transmitted. */
+ struct sk_buff_head out;
+
+ unsigned out_qlen; /* Total length of queued data chunks. */
+
+ /* Error of send failed, may used in SCTP_SEND_FAILED event. */
+ unsigned error;
+
+ /* These are control chunks we want to send. */
+ struct sk_buff_head control;
+
+ /* These are chunks that have been sacked but are above the
+ * CTSN, or cumulative tsn ack point.
+ */
+ struct list_head sacked;
+
+ /* Put chunks on this list to schedule them for
+ * retransmission.
+ */
+ struct list_head retransmit;
+
+ /* Put chunks on this list to save them for FWD TSN processing as
+ * they were abandoned.
+ */
+ struct list_head abandoned;
+
+ /* How many unackd bytes do we have in-flight? */
+ __u32 outstanding_bytes;
+
+ /* Corked? */
+ char cork;
+
+ /* Is this structure empty? */
+ char empty;
+
+ /* Are we kfree()able? */
+ char malloced;
+};
+
+void sctp_outq_init(struct sctp_association *, struct sctp_outq *);
+void sctp_outq_teardown(struct sctp_outq *);
+void sctp_outq_free(struct sctp_outq*);
+int sctp_outq_tail(struct sctp_outq *, struct sctp_chunk *chunk);
+int sctp_outq_flush(struct sctp_outq *, int);
+int sctp_outq_sack(struct sctp_outq *, struct sctp_sackhdr *);
+int sctp_outq_is_empty(const struct sctp_outq *);
+void sctp_outq_restart(struct sctp_outq *);
+
+void sctp_retransmit(struct sctp_outq *, struct sctp_transport *,
+ sctp_retransmit_reason_t);
+void sctp_retransmit_mark(struct sctp_outq *, struct sctp_transport *, __u8);
+int sctp_outq_uncork(struct sctp_outq *);
+/* Uncork and flush an outqueue. */
+static inline void sctp_outq_cork(struct sctp_outq *q)
+{
+ q->cork = 1;
+}
+
+/* These bind address data fields common between endpoints and associations */
+struct sctp_bind_addr {
+
+ /* RFC 2960 12.1 Parameters necessary for the SCTP instance
+ *
+ * SCTP Port: The local SCTP port number the endpoint is
+ * bound to.
+ */
+ __u16 port;
+
+ /* RFC 2960 12.1 Parameters necessary for the SCTP instance
+ *
+ * Address List: The list of IP addresses that this instance
+ * has bound. This information is passed to one's
+ * peer(s) in INIT and INIT ACK chunks.
+ */
+ struct list_head address_list;
+
+ int malloced; /* Are we kfree()able? */
+};
+
+void sctp_bind_addr_init(struct sctp_bind_addr *, __u16 port);
+void sctp_bind_addr_free(struct sctp_bind_addr *);
+int sctp_bind_addr_copy(struct sctp_bind_addr *dest,
+ const struct sctp_bind_addr *src,
+ sctp_scope_t scope, int gfp,int flags);
+int sctp_add_bind_addr(struct sctp_bind_addr *, union sctp_addr *,
+ int gfp);
+int sctp_del_bind_addr(struct sctp_bind_addr *, union sctp_addr *);
+int sctp_bind_addr_match(struct sctp_bind_addr *, const union sctp_addr *,
+ struct sctp_sock *);
+union sctp_addr *sctp_find_unmatch_addr(struct sctp_bind_addr *bp,
+ const union sctp_addr *addrs,
+ int addrcnt,
+ struct sctp_sock *opt);
+union sctp_params sctp_bind_addrs_to_raw(const struct sctp_bind_addr *bp,
+ int *addrs_len, int gfp);
+int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw, int len,
+ __u16 port, int gfp);
+
+sctp_scope_t sctp_scope(const union sctp_addr *);
+int sctp_in_scope(const union sctp_addr *addr, const sctp_scope_t scope);
+int sctp_is_any(const union sctp_addr *addr);
+int sctp_addr_is_valid(const union sctp_addr *addr);
+
+
+/* What type of endpoint? */
+typedef enum {
+ SCTP_EP_TYPE_SOCKET,
+ SCTP_EP_TYPE_ASSOCIATION,
+} sctp_endpoint_type_t;
+
+/*
+ * A common base class to bridge the implmentation view of a
+ * socket (usually listening) endpoint versus an association's
+ * local endpoint.
+ * This common structure is useful for several purposes:
+ * 1) Common interface for lookup routines.
+ * a) Subfunctions work for either endpoint or association
+ * b) Single interface to lookup allows hiding the lookup lock rather
+ * than acquiring it externally.
+ * 2) Common interface for the inbound chunk handling/state machine.
+ * 3) Common object handling routines for reference counting, etc.
+ * 4) Disentangle association lookup from endpoint lookup, where we
+ * do not have to find our endpoint to find our association.
+ *
+ */
+
+struct sctp_ep_common {
+ /* Fields to help us manage our entries in the hash tables. */
+ struct sctp_ep_common *next;
+ struct sctp_ep_common **pprev;
+ int hashent;
+
+ /* Runtime type information. What kind of endpoint is this? */
+ sctp_endpoint_type_t type;
+
+ /* Some fields to help us manage this object.
+ * refcnt - Reference count access to this object.
+ * dead - Do not attempt to use this object.
+ * malloced - Do we need to kfree this object?
+ */
+ atomic_t refcnt;
+ char dead;
+ char malloced;
+
+ /* What socket does this endpoint belong to? */
+ struct sock *sk;
+
+ /* This is where we receive inbound chunks. */
+ struct sctp_inq inqueue;
+
+ /* This substructure includes the defining parameters of the
+ * endpoint:
+ * bind_addr.port is our shared port number.
+ * bind_addr.address_list is our set of local IP addresses.
+ */
+ struct sctp_bind_addr bind_addr;
+
+ /* Protection during address list comparisons. */
+ rwlock_t addr_lock;
+};
+
+
+/* RFC Section 1.4 Key Terms
+ *
+ * o SCTP endpoint: The logical sender/receiver of SCTP packets. On a
+ * multi-homed host, an SCTP endpoint is represented to its peers as a
+ * combination of a set of eligible destination transport addresses to
+ * which SCTP packets can be sent and a set of eligible source
+ * transport addresses from which SCTP packets can be received.
+ * All transport addresses used by an SCTP endpoint must use the
+ * same port number, but can use multiple IP addresses. A transport
+ * address used by an SCTP endpoint must not be used by another
+ * SCTP endpoint. In other words, a transport address is unique
+ * to an SCTP endpoint.
+ *
+ * From an implementation perspective, each socket has one of these.
+ * A TCP-style socket will have exactly one association on one of
+ * these. An UDP-style socket will have multiple associations hanging
+ * off one of these.
+ */
+
+struct sctp_endpoint {
+ /* Common substructure for endpoint and association. */
+ struct sctp_ep_common base;
+
+ /* Associations: A list of current associations and mappings
+ * to the data consumers for each association. This
+ * may be in the form of a hash table or other
+ * implementation dependent structure. The data
+ * consumers may be process identification
+ * information such as file descriptors, named pipe
+ * pointer, or table pointers dependent on how SCTP
+ * is implemented.
+ */
+ /* This is really a list of struct sctp_association entries. */
+ struct list_head asocs;
+
+ /* Secret Key: A secret key used by this endpoint to compute
+ * the MAC. This SHOULD be a cryptographic quality
+ * random number with a sufficient length.
+ * Discussion in [RFC1750] can be helpful in
+ * selection of the key.
+ */
+ __u8 secret_key[SCTP_HOW_MANY_SECRETS][SCTP_SECRET_SIZE];
+ int current_key;
+ int last_key;
+ int key_changed_at;
+
+ /* Default timeouts. */
+ int timeouts[SCTP_NUM_TIMEOUT_TYPES];
+
+ /* Various thresholds. */
+
+ /* Name for debugging output... */
+ char *debug_name;
+};
+
+/* Recover the outter endpoint structure. */
+static inline struct sctp_endpoint *sctp_ep(struct sctp_ep_common *base)
+{
+ struct sctp_endpoint *ep;
+
+ ep = container_of(base, struct sctp_endpoint, base);
+ return ep;
+}
+
+/* These are function signatures for manipulating endpoints. */
+struct sctp_endpoint *sctp_endpoint_new(struct sock *, int);
+void sctp_endpoint_free(struct sctp_endpoint *);
+void sctp_endpoint_put(struct sctp_endpoint *);
+void sctp_endpoint_hold(struct sctp_endpoint *);
+void sctp_endpoint_add_asoc(struct sctp_endpoint *, struct sctp_association *);
+struct sctp_association *sctp_endpoint_lookup_assoc(
+ const struct sctp_endpoint *ep,
+ const union sctp_addr *paddr,
+ struct sctp_transport **);
+int sctp_endpoint_is_peeled_off(struct sctp_endpoint *,
+ const union sctp_addr *);
+struct sctp_endpoint *sctp_endpoint_is_match(struct sctp_endpoint *,
+ const union sctp_addr *);
+int sctp_has_association(const union sctp_addr *laddr,
+ const union sctp_addr *paddr);
+
+int sctp_verify_init(const struct sctp_association *asoc, sctp_cid_t,
+ sctp_init_chunk_t *peer_init, struct sctp_chunk *chunk,
+ struct sctp_chunk **err_chunk);
+int sctp_process_init(struct sctp_association *, sctp_cid_t cid,
+ const union sctp_addr *peer,
+ sctp_init_chunk_t *init, int gfp);
+__u32 sctp_generate_tag(const struct sctp_endpoint *);
+__u32 sctp_generate_tsn(const struct sctp_endpoint *);
+
+
+/* RFC2960
+ *
+ * 12. Recommended Transmission Control Block (TCB) Parameters
+ *
+ * This section details a recommended set of parameters that should
+ * be contained within the TCB for an implementation. This section is
+ * for illustrative purposes and should not be deemed as requirements
+ * on an implementation or as an exhaustive list of all parameters
+ * inside an SCTP TCB. Each implementation may need its own additional
+ * parameters for optimization.
+ */
+
+
+/* Here we have information about each individual association. */
+struct sctp_association {
+
+ /* A base structure common to endpoint and association.
+ * In this context, it represents the associations's view
+ * of the local endpoint of the association.
+ */
+ struct sctp_ep_common base;
+
+ /* Associations on the same socket. */
+ struct list_head asocs;
+
+ /* association id. */
+ sctp_assoc_t assoc_id;
+
+ /* This is our parent endpoint. */
+ struct sctp_endpoint *ep;
+
+ /* These are those association elements needed in the cookie. */
+ struct sctp_cookie c;
+
+ /* This is all information about our peer. */
+ struct {
+ /* rwnd
+ *
+ * Peer Rwnd : Current calculated value of the peer's rwnd.
+ */
+ __u32 rwnd;
+
+ /* transport_addr_list
+ *
+ * Peer : A list of SCTP transport addresses that the
+ * Transport : peer is bound to. This information is derived
+ * Address : from the INIT or INIT ACK and is used to
+ * List : associate an inbound packet with a given
+ * : association. Normally this information is
+ * : hashed or keyed for quick lookup and access
+ * : of the TCB.
+ *
+ * It is a list of SCTP_transport's.
+ */
+ struct list_head transport_addr_list;
+
+ /* port
+ * The transport layer port number.
+ */
+ __u16 port;
+
+ /* primary_path
+ *
+ * Primary : This is the current primary destination
+ * Path : transport address of the peer endpoint. It
+ * : may also specify a source transport address
+ * : on this endpoint.
+ *
+ * All of these paths live on transport_addr_list.
+ *
+ * At the bakeoffs, we discovered that the intent of
+ * primaryPath is that it only changes when the ULP
+ * asks to have it changed. We add the activePath to
+ * designate the connection we are currently using to
+ * transmit new data and most control chunks.
+ */
+ struct sctp_transport *primary_path;
+
+ /* Cache the primary path address here, when we
+ * need a an address for msg_name.
+ */
+ union sctp_addr primary_addr;
+
+ /* active_path
+ * The path that we are currently using to
+ * transmit new data and most control chunks.
+ */
+ struct sctp_transport *active_path;
+
+ /* retran_path
+ *
+ * RFC2960 6.4 Multi-homed SCTP Endpoints
+ * ...
+ * Furthermore, when its peer is multi-homed, an
+ * endpoint SHOULD try to retransmit a chunk to an
+ * active destination transport address that is
+ * different from the last destination address to
+ * which the DATA chunk was sent.
+ */
+ struct sctp_transport *retran_path;
+
+ /* Pointer to last transport I have sent on. */
+ struct sctp_transport *last_sent_to;
+
+ /* This is the last transport I have received DATA on. */
+ struct sctp_transport *last_data_from;
+
+ /*
+ * Mapping An array of bits or bytes indicating which out of
+ * Array order TSN's have been received (relative to the
+ * Last Rcvd TSN). If no gaps exist, i.e. no out of
+ * order packets have been received, this array
+ * will be set to all zero. This structure may be
+ * in the form of a circular buffer or bit array.
+ *
+ * Last Rcvd : This is the last TSN received in
+ * TSN : sequence. This value is set initially by
+ * : taking the peer's Initial TSN, received in
+ * : the INIT or INIT ACK chunk, and subtracting
+ * : one from it.
+ *
+ * Throughout most of the specification this is called the
+ * "Cumulative TSN ACK Point". In this case, we
+ * ignore the advice in 12.2 in favour of the term
+ * used in the bulk of the text. This value is hidden
+ * in tsn_map--we get it by calling sctp_tsnmap_get_ctsn().
+ */
+ struct sctp_tsnmap tsn_map;
+ __u8 _map[sctp_tsnmap_storage_size(SCTP_TSN_MAP_SIZE)];
+
+ /* Ack State : This flag indicates if the next received
+ * : packet is to be responded to with a
+ * : SACK. This is initializedto 0. When a packet
+ * : is received it is incremented. If this value
+ * : reaches 2 or more, a SACK is sent and the
+ * : value is reset to 0. Note: This is used only
+ * : when no DATA chunks are received out of
+ * : order. When DATA chunks are out of order,
+ * : SACK's are not delayed (see Section 6).
+ */
+ __u8 sack_needed; /* Do we need to sack the peer? */
+
+ /* These are capabilities which our peer advertised. */
+ __u8 ecn_capable; /* Can peer do ECN? */
+ __u8 ipv4_address; /* Peer understands IPv4 addresses? */
+ __u8 ipv6_address; /* Peer understands IPv6 addresses? */
+ __u8 hostname_address;/* Peer understands DNS addresses? */
+ __u8 asconf_capable; /* Does peer support ADDIP? */
+ __u8 prsctp_capable; /* Can peer do PR-SCTP? */
+
+ __u32 adaption_ind; /* Adaption Code point. */
+
+ /* This mask is used to disable sending the ASCONF chunk
+ * with specified parameter to peer.
+ */
+ __u16 addip_disabled_mask;
+
+ struct sctp_inithdr i;
+ int cookie_len;
+ void *cookie;
+
+ /* ADDIP Section 4.2 Upon reception of an ASCONF Chunk.
+ * C1) ... "Peer-Serial-Number'. This value MUST be initialized to the
+ * Initial TSN Value minus 1
+ */
+ __u32 addip_serial;
+ } peer;
+
+ /* State : A state variable indicating what state the
+ * : association is in, i.e. COOKIE-WAIT,
+ * : COOKIE-ECHOED, ESTABLISHED, SHUTDOWN-PENDING,
+ * : SHUTDOWN-SENT, SHUTDOWN-RECEIVED, SHUTDOWN-ACK-SENT.
+ *
+ * Note: No "CLOSED" state is illustrated since if a
+ * association is "CLOSED" its TCB SHOULD be removed.
+ *
+ * In this implementation we DO have a CLOSED
+ * state which is used during initiation and shutdown.
+ *
+ * State takes values from SCTP_STATE_*.
+ */
+ sctp_state_t state;
+
+ /* The cookie life I award for any cookie. */
+ struct timeval cookie_life;
+
+ /* Overall : The overall association error count.
+ * Error Count : [Clear this any time I get something.]
+ */
+ int overall_error_count;
+
+ /* These are the association's initial, max, and min RTO values.
+ * These values will be initialized by system defaults, but can
+ * be modified via the SCTP_RTOINFO socket option.
+ */
+ __u32 rto_initial;
+ __u32 rto_max;
+ __u32 rto_min;
+
+ /* Maximum number of new data packets that can be sent in a burst. */
+ int max_burst;
+
+ /* This is the max_retrans value for the association. This value will
+ * be initialized initialized from system defaults, but can be
+ * modified by the SCTP_ASSOCINFO socket option.
+ */
+ int max_retrans;
+
+ /* Maximum number of times the endpoint will retransmit INIT */
+ __u16 max_init_attempts;
+
+ /* How many times have we resent an INIT? */
+ __u16 init_retries;
+
+ /* The largest timeout or RTO value to use in attempting an INIT */
+ __u16 max_init_timeo;
+
+ int timeouts[SCTP_NUM_TIMEOUT_TYPES];
+ struct timer_list timers[SCTP_NUM_TIMEOUT_TYPES];
+
+ /* Transport to which SHUTDOWN chunk was last sent. */
+ struct sctp_transport *shutdown_last_sent_to;
+
+ /* Next TSN : The next TSN number to be assigned to a new
+ * : DATA chunk. This is sent in the INIT or INIT
+ * : ACK chunk to the peer and incremented each
+ * : time a DATA chunk is assigned a TSN
+ * : (normally just prior to transmit or during
+ * : fragmentation).
+ */
+ __u32 next_tsn;
+
+ /*
+ * Last Rcvd : This is the last TSN received in sequence. This value
+ * TSN : is set initially by taking the peer's Initial TSN,
+ * : received in the INIT or INIT ACK chunk, and
+ * : subtracting one from it.
+ *
+ * Most of RFC 2960 refers to this as the Cumulative TSN Ack Point.
+ */
+
+ __u32 ctsn_ack_point;
+
+ /* PR-SCTP Advanced.Peer.Ack.Point */
+ __u32 adv_peer_ack_point;
+
+ /* Highest TSN that is acknowledged by incoming SACKs. */
+ __u32 highest_sacked;
+
+ /* The number of unacknowledged data chunks. Reported through
+ * the SCTP_STATUS sockopt.
+ */
+ __u16 unack_data;
+
+ /* This is the association's receive buffer space. This value is used
+ * to set a_rwnd field in an INIT or a SACK chunk.
+ */
+ __u32 rwnd;
+
+ /* This is the last advertised value of rwnd over a SACK chunk. */
+ __u32 a_rwnd;
+
+ /* Number of bytes by which the rwnd has slopped. The rwnd is allowed
+ * to slop over a maximum of the association's frag_point.
+ */
+ __u32 rwnd_over;
+
+ /* This is the sndbuf size in use for the association.
+ * This corresponds to the sndbuf size for the association,
+ * as specified in the sk->sndbuf.
+ */
+ int sndbuf_used;
+
+ /* This is the wait queue head for send requests waiting on
+ * the association sndbuf space.
+ */
+ wait_queue_head_t wait;
+
+ /* Association : The smallest PMTU discovered for all of the
+ * PMTU : peer's transport addresses.
+ */
+ __u32 pmtu;
+
+ /* The message size at which SCTP fragmentation will occur. */
+ __u32 frag_point;
+
+ /* Currently only one counter is used to count INIT errors. */
+ int counters[SCTP_NUMBER_COUNTERS];
+
+ /* Default send parameters. */
+ __u16 default_stream;
+ __u16 default_flags;
+ __u32 default_ppid;
+ __u32 default_context;
+ __u32 default_timetolive;
+
+ /* This tracks outbound ssn for a given stream. */
+ struct sctp_ssnmap *ssnmap;
+
+ /* All outbound chunks go through this structure. */
+ struct sctp_outq outqueue;
+
+ /* A smart pipe that will handle reordering and fragmentation,
+ * as well as handle passing events up to the ULP.
+ */
+ struct sctp_ulpq ulpq;
+
+ /* Last TSN that caused an ECNE Chunk to be sent. */
+ __u32 last_ecne_tsn;
+
+ /* Last TSN that caused a CWR Chunk to be sent. */
+ __u32 last_cwr_tsn;
+
+ /* How many duplicated TSNs have we seen? */
+ int numduptsns;
+
+ /* Number of seconds of idle time before an association is closed. */
+ __u32 autoclose;
+
+ /* These are to support
+ * "SCTP Extensions for Dynamic Reconfiguration of IP Addresses
+ * and Enforcement of Flow and Message Limits"
+ * <draft-ietf-tsvwg-addip-sctp-02.txt>
+ * or "ADDIP" for short.
+ */
+
+
+
+ /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
+ *
+ * R1) One and only one ASCONF Chunk MAY be in transit and
+ * unacknowledged at any one time. If a sender, after sending
+ * an ASCONF chunk, decides it needs to transfer another
+ * ASCONF Chunk, it MUST wait until the ASCONF-ACK Chunk
+ * returns from the previous ASCONF Chunk before sending a
+ * subsequent ASCONF. Note this restriction binds each side,
+ * so at any time two ASCONF may be in-transit on any given
+ * association (one sent from each endpoint).
+ *
+ * [This is our one-and-only-one ASCONF in flight. If we do
+ * not have an ASCONF in flight, this is NULL.]
+ */
+ struct sctp_chunk *addip_last_asconf;
+
+ /* ADDIP Section 4.2 Upon reception of an ASCONF Chunk.
+ *
+ * IMPLEMENTATION NOTE: As an optimization a receiver may wish
+ * to save the last ASCONF-ACK for some predetermined period
+ * of time and instead of re-processing the ASCONF (with the
+ * same serial number) it may just re-transmit the
+ * ASCONF-ACK. It may wish to use the arrival of a new serial
+ * number to discard the previously saved ASCONF-ACK or any
+ * other means it may choose to expire the saved ASCONF-ACK.
+ *
+ * [This is our saved ASCONF-ACK. We invalidate it when a new
+ * ASCONF serial number arrives.]
+ */
+ struct sctp_chunk *addip_last_asconf_ack;
+
+ /* These ASCONF chunks are waiting to be sent.
+ *
+ * These chunaks can't be pushed to outqueue until receiving
+ * ASCONF_ACK for the previous ASCONF indicated by
+ * addip_last_asconf, so as to guarantee that only one ASCONF
+ * is in flight at any time.
+ *
+ * ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
+ *
+ * In defining the ASCONF Chunk transfer procedures, it is
+ * essential that these transfers MUST NOT cause congestion
+ * within the network. To achieve this, we place these
+ * restrictions on the transfer of ASCONF Chunks:
+ *
+ * R1) One and only one ASCONF Chunk MAY be in transit and
+ * unacknowledged at any one time. If a sender, after sending
+ * an ASCONF chunk, decides it needs to transfer another
+ * ASCONF Chunk, it MUST wait until the ASCONF-ACK Chunk
+ * returns from the previous ASCONF Chunk before sending a
+ * subsequent ASCONF. Note this restriction binds each side,
+ * so at any time two ASCONF may be in-transit on any given
+ * association (one sent from each endpoint).
+ *
+ *
+ * [I really think this is EXACTLY the sort of intelligence
+ * which already resides in sctp_outq. Please move this
+ * queue and its supporting logic down there. --piggy]
+ */
+ struct sk_buff_head addip_chunks;
+
+ /* ADDIP Section 4.1 ASCONF Chunk Procedures
+ *
+ * A2) A serial number should be assigned to the Chunk. The
+ * serial number SHOULD be a monotonically increasing
+ * number. The serial number SHOULD be initialized at
+ * the start of the association to the same value as the
+ * Initial TSN and every time a new ASCONF chunk is created
+ * it is incremented by one after assigning the serial number
+ * to the newly created chunk.
+ *
+ * ADDIP
+ * 3.1.1 Address/Stream Configuration Change Chunk (ASCONF)
+ *
+ * Serial Number : 32 bits (unsigned integer)
+ *
+ * This value represents a Serial Number for the ASCONF
+ * Chunk. The valid range of Serial Number is from 0 to
+ * 4294967295 (2^32 - 1). Serial Numbers wrap back to 0
+ * after reaching 4294967295.
+ */
+ __u32 addip_serial;
+
+ /* Need to send an ECNE Chunk? */
+ char need_ecne;
+
+ /* Is it a temporary association? */
+ char temp;
+};
+
+
+/* An eyecatcher for determining if we are really looking at an
+ * association data structure.
+ */
+enum {
+ SCTP_ASSOC_EYECATCHER = 0xa550c123,
+};
+
+/* Recover the outter association structure. */
+static inline struct sctp_association *sctp_assoc(struct sctp_ep_common *base)
+{
+ struct sctp_association *asoc;
+
+ asoc = container_of(base, struct sctp_association, base);
+ return asoc;
+}
+
+/* These are function signatures for manipulating associations. */
+
+
+struct sctp_association *
+sctp_association_new(const struct sctp_endpoint *, const struct sock *,
+ sctp_scope_t scope, int gfp);
+void sctp_association_free(struct sctp_association *);
+void sctp_association_put(struct sctp_association *);
+void sctp_association_hold(struct sctp_association *);
+
+struct sctp_transport *sctp_assoc_choose_shutdown_transport(
+ struct sctp_association *);
+void sctp_assoc_update_retran_path(struct sctp_association *);
+struct sctp_transport *sctp_assoc_lookup_paddr(const struct sctp_association *,
+ const union sctp_addr *);
+int sctp_assoc_lookup_laddr(struct sctp_association *asoc,
+ const union sctp_addr *laddr);
+struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *,
+ const union sctp_addr *address,
+ const int gfp);
+void sctp_assoc_del_peer(struct sctp_association *asoc,
+ const union sctp_addr *addr);
+void sctp_assoc_control_transport(struct sctp_association *,
+ struct sctp_transport *,
+ sctp_transport_cmd_t, sctp_sn_error_t);
+struct sctp_transport *sctp_assoc_lookup_tsn(struct sctp_association *, __u32);
+struct sctp_transport *sctp_assoc_is_match(struct sctp_association *,
+ const union sctp_addr *,
+ const union sctp_addr *);
+void sctp_assoc_migrate(struct sctp_association *, struct sock *);
+void sctp_assoc_update(struct sctp_association *old,
+ struct sctp_association *new);
+
+__u32 sctp_association_get_next_tsn(struct sctp_association *);
+
+void sctp_assoc_sync_pmtu(struct sctp_association *);
+void sctp_assoc_rwnd_increase(struct sctp_association *, unsigned);
+void sctp_assoc_rwnd_decrease(struct sctp_association *, unsigned);
+void sctp_assoc_set_primary(struct sctp_association *,
+ struct sctp_transport *);
+int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *, int);
+int sctp_assoc_set_bind_addr_from_cookie(struct sctp_association *,
+ struct sctp_cookie*, int gfp);
+
+int sctp_cmp_addr_exact(const union sctp_addr *ss1,
+ const union sctp_addr *ss2);
+struct sctp_chunk *sctp_get_ecne_prepend(struct sctp_association *asoc);
+
+/* A convenience structure to parse out SCTP specific CMSGs. */
+typedef struct sctp_cmsgs {
+ struct sctp_initmsg *init;
+ struct sctp_sndrcvinfo *info;
+} sctp_cmsgs_t;
+
+/* Structure for tracking memory objects */
+typedef struct {
+ char *label;
+ atomic_t *counter;
+} sctp_dbg_objcnt_entry_t;
+
+#endif /* __sctp_structs_h__ */
diff --git a/include/net/sctp/tsnmap.h b/include/net/sctp/tsnmap.h
new file mode 100644
index 00000000000..021947da70e
--- /dev/null
+++ b/include/net/sctp/tsnmap.h
@@ -0,0 +1,207 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * These are the definitions needed for the tsnmap type. The tsnmap is used
+ * to track out of order TSNs received.
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+#include <net/sctp/constants.h>
+
+#ifndef __sctp_tsnmap_h__
+#define __sctp_tsnmap_h__
+
+/* RFC 2960 12.2 Parameters necessary per association (i.e. the TCB)
+ * Mapping An array of bits or bytes indicating which out of
+ * Array order TSN's have been received (relative to the
+ * Last Rcvd TSN). If no gaps exist, i.e. no out of
+ * order packets have been received, this array
+ * will be set to all zero. This structure may be
+ * in the form of a circular buffer or bit array.
+ */
+struct sctp_tsnmap {
+ /* This array counts the number of chunks with each TSN.
+ * It points at one of the two buffers with which we will
+ * ping-pong between.
+ */
+ __u8 *tsn_map;
+
+ /* This marks the tsn which overflows the tsn_map, when the
+ * cumulative ack point reaches this point we know we can switch
+ * maps (tsn_map and overflow_map swap).
+ */
+ __u32 overflow_tsn;
+
+ /* This is the overflow array for tsn_map.
+ * It points at one of the other ping-pong buffers.
+ */
+ __u8 *overflow_map;
+
+ /* This is the TSN at tsn_map[0]. */
+ __u32 base_tsn;
+
+ /* Last Rcvd : This is the last TSN received in
+ * TSN : sequence. This value is set initially by
+ * : taking the peer's Initial TSN, received in
+ * : the INIT or INIT ACK chunk, and subtracting
+ * : one from it.
+ *
+ * Throughout most of the specification this is called the
+ * "Cumulative TSN ACK Point". In this case, we
+ * ignore the advice in 12.2 in favour of the term
+ * used in the bulk of the text.
+ */
+ __u32 cumulative_tsn_ack_point;
+
+ /* This is the minimum number of TSNs we can track. This corresponds
+ * to the size of tsn_map. Note: the overflow_map allows us to
+ * potentially track more than this quantity.
+ */
+ __u16 len;
+
+ /* This is the highest TSN we've marked. */
+ __u32 max_tsn_seen;
+
+ /* Data chunks pending receipt. used by SCTP_STATUS sockopt */
+ __u16 pending_data;
+
+ /* Record duplicate TSNs here. We clear this after
+ * every SACK. Store up to SCTP_MAX_DUP_TSNS worth of
+ * information.
+ */
+ __u32 dup_tsns[SCTP_MAX_DUP_TSNS];
+ __u16 num_dup_tsns;
+
+ /* Record gap ack block information here. */
+ struct sctp_gap_ack_block gabs[SCTP_MAX_GABS];
+
+ int malloced;
+
+ __u8 raw_map[0];
+};
+
+struct sctp_tsnmap_iter {
+ __u32 start;
+};
+
+/* This macro assists in creation of external storage for variable length
+ * internal buffers. We double allocate so the overflow map works.
+ */
+#define sctp_tsnmap_storage_size(count) (sizeof(__u8) * (count) * 2)
+
+/* Initialize a block of memory as a tsnmap. */
+struct sctp_tsnmap *sctp_tsnmap_init(struct sctp_tsnmap *, __u16 len,
+ __u32 initial_tsn);
+
+/* Test the tracking state of this TSN.
+ * Returns:
+ * 0 if the TSN has not yet been seen
+ * >0 if the TSN has been seen (duplicate)
+ * <0 if the TSN is invalid (too large to track)
+ */
+int sctp_tsnmap_check(const struct sctp_tsnmap *, __u32 tsn);
+
+/* Mark this TSN as seen. */
+void sctp_tsnmap_mark(struct sctp_tsnmap *, __u32 tsn);
+
+/* Mark this TSN and all lower as seen. */
+void sctp_tsnmap_skip(struct sctp_tsnmap *map, __u32 tsn);
+
+/* Retrieve the Cumulative TSN ACK Point. */
+static inline __u32 sctp_tsnmap_get_ctsn(const struct sctp_tsnmap *map)
+{
+ return map->cumulative_tsn_ack_point;
+}
+
+/* Retrieve the highest TSN we've seen. */
+static inline __u32 sctp_tsnmap_get_max_tsn_seen(const struct sctp_tsnmap *map)
+{
+ return map->max_tsn_seen;
+}
+
+/* How many duplicate TSNs are stored? */
+static inline __u16 sctp_tsnmap_num_dups(struct sctp_tsnmap *map)
+{
+ return map->num_dup_tsns;
+}
+
+/* Return pointer to duplicate tsn array as needed by SACK. */
+static inline __u32 *sctp_tsnmap_get_dups(struct sctp_tsnmap *map)
+{
+ map->num_dup_tsns = 0;
+ return map->dup_tsns;
+}
+
+/* How many gap ack blocks do we have recorded? */
+__u16 sctp_tsnmap_num_gabs(struct sctp_tsnmap *map);
+
+/* Refresh the count on pending data. */
+__u16 sctp_tsnmap_pending(struct sctp_tsnmap *map);
+
+/* Return pointer to gap ack blocks as needed by SACK. */
+static inline struct sctp_gap_ack_block *sctp_tsnmap_get_gabs(struct sctp_tsnmap *map)
+{
+ return map->gabs;
+}
+
+/* Is there a gap in the TSN map? */
+static inline int sctp_tsnmap_has_gap(const struct sctp_tsnmap *map)
+{
+ int has_gap;
+
+ has_gap = (map->cumulative_tsn_ack_point != map->max_tsn_seen);
+ return has_gap;
+}
+
+/* Mark a duplicate TSN. Note: limit the storage of duplicate TSN
+ * information.
+ */
+static inline void sctp_tsnmap_mark_dup(struct sctp_tsnmap *map, __u32 tsn)
+{
+ if (map->num_dup_tsns < SCTP_MAX_DUP_TSNS)
+ map->dup_tsns[map->num_dup_tsns++] = htonl(tsn);
+}
+
+/* Renege a TSN that was seen. */
+void sctp_tsnmap_renege(struct sctp_tsnmap *, __u32 tsn);
+
+/* Is there a gap in the TSN map? */
+int sctp_tsnmap_has_gap(const struct sctp_tsnmap *);
+
+#endif /* __sctp_tsnmap_h__ */
diff --git a/include/net/sctp/ulpevent.h b/include/net/sctp/ulpevent.h
new file mode 100644
index 00000000000..1019d83a580
--- /dev/null
+++ b/include/net/sctp/ulpevent.h
@@ -0,0 +1,162 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001 Nokia, Inc.
+ * Copyright (c) 2001 La Monte H.P. Yarroll
+ *
+ * These are the definitions needed for the sctp_ulpevent type. The
+ * sctp_ulpevent type is used to carry information from the state machine
+ * upwards to the ULP.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#ifndef __sctp_ulpevent_h__
+#define __sctp_ulpevent_h__
+
+/* A structure to carry information to the ULP (e.g. Sockets API) */
+/* Warning: This sits inside an skb.cb[] area. Be very careful of
+ * growing this structure as it is at the maximum limit now.
+ */
+struct sctp_ulpevent {
+ struct sctp_association *asoc;
+ __u16 stream;
+ __u16 ssn;
+ __u16 flags;
+ __u32 ppid;
+ __u32 tsn;
+ __u32 cumtsn;
+ int msg_flags;
+ int iif;
+};
+
+/* Retrieve the skb this event sits inside of. */
+static inline struct sk_buff *sctp_event2skb(struct sctp_ulpevent *ev)
+{
+ return container_of((void *)ev, struct sk_buff, cb);
+}
+
+/* Retrieve & cast the event sitting inside the skb. */
+static inline struct sctp_ulpevent *sctp_skb2event(struct sk_buff *skb)
+{
+ return (struct sctp_ulpevent *)skb->cb;
+}
+
+void sctp_ulpevent_free(struct sctp_ulpevent *);
+int sctp_ulpevent_is_notification(const struct sctp_ulpevent *);
+void sctp_queue_purge_ulpevents(struct sk_buff_head *list);
+
+struct sctp_ulpevent *sctp_ulpevent_make_assoc_change(
+ const struct sctp_association *asoc,
+ __u16 flags,
+ __u16 state,
+ __u16 error,
+ __u16 outbound,
+ __u16 inbound,
+ int gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_peer_addr_change(
+ const struct sctp_association *asoc,
+ const struct sockaddr_storage *aaddr,
+ int flags,
+ int state,
+ int error,
+ int gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
+ const struct sctp_association *asoc,
+ struct sctp_chunk *chunk,
+ __u16 flags,
+ int gfp);
+struct sctp_ulpevent *sctp_ulpevent_make_send_failed(
+ const struct sctp_association *asoc,
+ struct sctp_chunk *chunk,
+ __u16 flags,
+ __u32 error,
+ int gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_shutdown_event(
+ const struct sctp_association *asoc,
+ __u16 flags,
+ int gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_pdapi(
+ const struct sctp_association *asoc,
+ __u32 indication, int gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_adaption_indication(
+ const struct sctp_association *asoc, int gfp);
+
+struct sctp_ulpevent *sctp_ulpevent_make_rcvmsg(struct sctp_association *asoc,
+ struct sctp_chunk *chunk,
+ int gfp);
+
+void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
+ struct msghdr *);
+__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);
+
+/* Is this event type enabled? */
+static inline int sctp_ulpevent_type_enabled(__u16 sn_type,
+ struct sctp_event_subscribe *mask)
+{
+ char *amask = (char *) mask;
+ return amask[sn_type - SCTP_SN_TYPE_BASE];
+}
+
+/* Given an event subscription, is this event enabled? */
+static inline int sctp_ulpevent_is_enabled(const struct sctp_ulpevent *event,
+ struct sctp_event_subscribe *mask)
+{
+ __u16 sn_type;
+ int enabled = 1;
+
+ if (sctp_ulpevent_is_notification(event)) {
+ sn_type = sctp_ulpevent_get_notification_type(event);
+ enabled = sctp_ulpevent_type_enabled(sn_type, mask);
+ }
+ return enabled;
+}
+
+#endif /* __sctp_ulpevent_h__ */
+
+
+
+
+
+
+
diff --git a/include/net/sctp/ulpqueue.h b/include/net/sctp/ulpqueue.h
new file mode 100644
index 00000000000..961736d29d2
--- /dev/null
+++ b/include/net/sctp/ulpqueue.h
@@ -0,0 +1,92 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001 Nokia, Inc.
+ * Copyright (c) 2001 La Monte H.P. Yarroll
+ *
+ * These are the definitions needed for the sctp_ulpq type. The
+ * sctp_ulpq is the interface between the Upper Layer Protocol, or ULP,
+ * and the core SCTP state machine. This is the component which handles
+ * reassembly and ordering.
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * the SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email addresses:
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#ifndef __sctp_ulpqueue_h__
+#define __sctp_ulpqueue_h__
+
+/* A structure to carry information to the ULP (e.g. Sockets API) */
+struct sctp_ulpq {
+ char malloced;
+ char pd_mode;
+ struct sctp_association *asoc;
+ struct sk_buff_head reasm;
+ struct sk_buff_head lobby;
+};
+
+/* Prototypes. */
+struct sctp_ulpq *sctp_ulpq_init(struct sctp_ulpq *,
+ struct sctp_association *);
+void sctp_ulpq_free(struct sctp_ulpq *);
+
+/* Add a new DATA chunk for processing. */
+int sctp_ulpq_tail_data(struct sctp_ulpq *, struct sctp_chunk *, int);
+
+/* Add a new event for propagation to the ULP. */
+int sctp_ulpq_tail_event(struct sctp_ulpq *, struct sctp_ulpevent *ev);
+
+/* Renege previously received chunks. */
+void sctp_ulpq_renege(struct sctp_ulpq *, struct sctp_chunk *, int);
+
+/* Perform partial delivery. */
+void sctp_ulpq_partial_delivery(struct sctp_ulpq *, struct sctp_chunk *, int);
+
+/* Abort the partial delivery. */
+void sctp_ulpq_abort_pd(struct sctp_ulpq *, int);
+
+/* Clear the partial data delivery condition on this socket. */
+int sctp_clear_pd(struct sock *sk);
+
+/* Skip over an SSN. */
+void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
+
+#endif /* __sctp_ulpqueue_h__ */
+
+
+
+
+
+
+
diff --git a/include/net/sctp/user.h b/include/net/sctp/user.h
new file mode 100644
index 00000000000..2758e8ce4f2
--- /dev/null
+++ b/include/net/sctp/user.h
@@ -0,0 +1,589 @@
+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2002 Intel Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * This header represents the structures and constants needed to support
+ * the SCTP Extension to the Sockets API.
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * R. Stewart <randall@sctp.chicago.il.us>
+ * K. Morneau <kmorneau@cisco.com>
+ * Q. Xie <qxie1@email.mot.com>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * Daisy Chang <daisyc@us.ibm.com>
+ * Ryan Layer <rmlayer@us.ibm.com>
+ * Ardelle Fan <ardelle.fan@intel.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ *
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+
+#ifndef __net_sctp_user_h__
+#define __net_sctp_user_h__
+
+#include <linux/types.h>
+#include <linux/socket.h>
+
+typedef __s32 sctp_assoc_t;
+
+/* The following symbols come from the Sockets API Extensions for
+ * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
+ */
+enum sctp_optname {
+ SCTP_RTOINFO,
+#define SCTP_RTOINFO SCTP_RTOINFO
+ SCTP_ASSOCINFO,
+#define SCTP_ASSOCINFO SCTP_ASSOCINFO
+ SCTP_INITMSG,
+#define SCTP_INITMSG SCTP_INITMSG
+ SCTP_NODELAY, /* Get/set nodelay option. */
+#define SCTP_NODELAY SCTP_NODELAY
+ SCTP_AUTOCLOSE,
+#define SCTP_AUTOCLOSE SCTP_AUTOCLOSE
+ SCTP_SET_PEER_PRIMARY_ADDR,
+#define SCTP_SET_PEER_PRIMARY_ADDR SCTP_SET_PEER_PRIMARY_ADDR
+ SCTP_PRIMARY_ADDR,
+#define SCTP_PRIMARY_ADDR SCTP_PRIMARY_ADDR
+ SCTP_ADAPTION_LAYER,
+#define SCTP_ADAPTION_LAYER SCTP_ADAPTION_LAYER
+ SCTP_DISABLE_FRAGMENTS,
+#define SCTP_DISABLE_FRAGMENTS SCTP_DISABLE_FRAGMENTS
+ SCTP_PEER_ADDR_PARAMS,
+#define SCTP_PEER_ADDR_PARAMS SCTP_PEER_ADDR_PARAMS
+ SCTP_DEFAULT_SEND_PARAM,
+#define SCTP_DEFAULT_SEND_PARAM SCTP_DEFAULT_SEND_PARAM
+ SCTP_EVENTS,
+#define SCTP_EVENTS SCTP_EVENTS
+ SCTP_I_WANT_MAPPED_V4_ADDR, /* Turn on/off mapped v4 addresses */
+#define SCTP_I_WANT_MAPPED_V4_ADDR SCTP_I_WANT_MAPPED_V4_ADDR
+ SCTP_MAXSEG, /* Get/set maximum fragment. */
+#define SCTP_MAXSEG SCTP_MAXSEG
+ SCTP_STATUS,
+#define SCTP_STATUS SCTP_STATUS
+ SCTP_GET_PEER_ADDR_INFO,
+#define SCTP_GET_PEER_ADDR_INFO SCTP_GET_PEER_ADDR_INFO
+
+ /* Internal Socket Options. Some of the sctp library functions are
+ * implemented using these socket options.
+ */
+ SCTP_SOCKOPT_BINDX_ADD = 100,/* BINDX requests for adding addresses. */
+#define SCTP_SOCKOPT_BINDX_ADD SCTP_SOCKOPT_BINDX_ADD
+ SCTP_SOCKOPT_BINDX_REM, /* BINDX requests for removing addresses. */
+#define SCTP_SOCKOPT_BINDX_REM SCTP_SOCKOPT_BINDX_REM
+ SCTP_SOCKOPT_PEELOFF, /* peel off association. */
+#define SCTP_SOCKOPT_PEELOFF SCTP_SOCKOPT_PEELOFF
+ SCTP_GET_PEER_ADDRS_NUM, /* Get number of peer addresss. */
+#define SCTP_GET_PEER_ADDRS_NUM SCTP_GET_PEER_ADDRS_NUM
+ SCTP_GET_PEER_ADDRS, /* Get all peer addresss. */
+#define SCTP_GET_PEER_ADDRS SCTP_GET_PEER_ADDRS
+ SCTP_GET_LOCAL_ADDRS_NUM, /* Get number of local addresss. */
+#define SCTP_GET_LOCAL_ADDRS_NUM SCTP_GET_LOCAL_ADDRS_NUM
+ SCTP_GET_LOCAL_ADDRS, /* Get all local addresss. */
+#define SCTP_GET_LOCAL_ADDRS SCTP_GET_LOCAL_ADDRS
+};
+
+/*
+ * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
+ *
+ * This cmsghdr structure provides information for initializing new
+ * SCTP associations with sendmsg(). The SCTP_INITMSG socket option
+ * uses this same data structure. This structure is not used for
+ * recvmsg().
+ *
+ * cmsg_level cmsg_type cmsg_data[]
+ * ------------ ------------ ----------------------
+ * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
+ *
+ */
+struct sctp_initmsg {
+ __u16 sinit_num_ostreams;
+ __u16 sinit_max_instreams;
+ __u16 sinit_max_attempts;
+ __u16 sinit_max_init_timeo;
+};
+
+/*
+ * 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
+ *
+ * This cmsghdr structure specifies SCTP options for sendmsg() and
+ * describes SCTP header information about a received message through
+ * recvmsg().
+ *
+ * cmsg_level cmsg_type cmsg_data[]
+ * ------------ ------------ ----------------------
+ * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
+ *
+ */
+struct sctp_sndrcvinfo {
+ __u16 sinfo_stream;
+ __u16 sinfo_ssn;
+ __u16 sinfo_flags;
+ __u32 sinfo_ppid;
+ __u32 sinfo_context;
+ __u32 sinfo_timetolive;
+ __u32 sinfo_tsn;
+ __u32 sinfo_cumtsn;
+ sctp_assoc_t sinfo_assoc_id;
+};
+
+/*
+ * sinfo_flags: 16 bits (unsigned integer)
+ *
+ * This field may contain any of the following flags and is composed of
+ * a bitwise OR of these values.
+ */
+
+enum sctp_sinfo_flags {
+ MSG_UNORDERED = 1, /* Send/receive message unordered. */
+ MSG_ADDR_OVER = 2, /* Override the primary destination. */
+ MSG_ABORT=4, /* Send an ABORT message to the peer. */
+ /* MSG_EOF is already defined per socket.h */
+};
+
+
+typedef union {
+ __u8 raw;
+ struct sctp_initmsg init;
+ struct sctp_sndrcvinfo sndrcv;
+} sctp_cmsg_data_t;
+
+/* These are cmsg_types. */
+typedef enum sctp_cmsg_type {
+ SCTP_INIT, /* 5.2.1 SCTP Initiation Structure */
+ SCTP_SNDRCV, /* 5.2.2 SCTP Header Information Structure */
+} sctp_cmsg_t;
+
+
+/*
+ * 5.3.1.1 SCTP_ASSOC_CHANGE
+ *
+ * Communication notifications inform the ULP that an SCTP association
+ * has either begun or ended. The identifier for a new association is
+ * provided by this notificaion. The notification information has the
+ * following format:
+ *
+ */
+struct sctp_assoc_change {
+ __u16 sac_type;
+ __u16 sac_flags;
+ __u32 sac_length;
+ __u16 sac_state;
+ __u16 sac_error;
+ __u16 sac_outbound_streams;
+ __u16 sac_inbound_streams;
+ sctp_assoc_t sac_assoc_id;
+};
+
+/*
+ * sac_state: 32 bits (signed integer)
+ *
+ * This field holds one of a number of values that communicate the
+ * event that happened to the association. They include:
+ *
+ * Note: The following state names deviate from the API draft as
+ * the names clash too easily with other kernel symbols.
+ */
+enum sctp_sac_state {
+ SCTP_COMM_UP,
+ SCTP_COMM_LOST,
+ SCTP_RESTART,
+ SCTP_SHUTDOWN_COMP,
+ SCTP_CANT_STR_ASSOC,
+};
+
+/*
+ * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
+ *
+ * When a destination address on a multi-homed peer encounters a change
+ * an interface details event is sent. The information has the
+ * following structure:
+ */
+struct sctp_paddr_change {
+ __u16 spc_type;
+ __u16 spc_flags;
+ __u32 spc_length;
+ struct sockaddr_storage spc_aaddr;
+ int spc_state;
+ int spc_error;
+ sctp_assoc_t spc_assoc_id;
+};
+
+/*
+ * spc_state: 32 bits (signed integer)
+ *
+ * This field holds one of a number of values that communicate the
+ * event that happened to the address. They include:
+ */
+enum sctp_spc_state {
+ SCTP_ADDR_AVAILABLE,
+ SCTP_ADDR_UNREACHABLE,
+ SCTP_ADDR_REMOVED,
+ SCTP_ADDR_ADDED,
+ SCTP_ADDR_MADE_PRIM,
+};
+
+
+/*
+ * 5.3.1.3 SCTP_REMOTE_ERROR
+ *
+ * A remote peer may send an Operational Error message to its peer.
+ * This message indicates a variety of error conditions on an
+ * association. The entire error TLV as it appears on the wire is
+ * included in a SCTP_REMOTE_ERROR event. Please refer to the SCTP
+ * specification [SCTP] and any extensions for a list of possible
+ * error formats. SCTP error TLVs have the format:
+ */
+struct sctp_remote_error {
+ __u16 sre_type;
+ __u16 sre_flags;
+ __u32 sre_length;
+ __u16 sre_error;
+ sctp_assoc_t sre_assoc_id;
+ __u8 sre_data[0];
+};
+
+
+/*
+ * 5.3.1.4 SCTP_SEND_FAILED
+ *
+ * If SCTP cannot deliver a message it may return the message as a
+ * notification.
+ */
+struct sctp_send_failed {
+ __u16 ssf_type;
+ __u16 ssf_flags;
+ __u32 ssf_length;
+ __u32 ssf_error;
+ struct sctp_sndrcvinfo ssf_info;
+ sctp_assoc_t ssf_assoc_id;
+ __u8 ssf_data[0];
+};
+
+/*
+ * ssf_flags: 16 bits (unsigned integer)
+ *
+ * The flag value will take one of the following values
+ *
+ * SCTP_DATA_UNSENT - Indicates that the data was never put on
+ * the wire.
+ *
+ * SCTP_DATA_SENT - Indicates that the data was put on the wire.
+ * Note that this does not necessarily mean that the
+ * data was (or was not) successfully delivered.
+ */
+enum sctp_ssf_flags {
+ SCTP_DATA_UNSENT,
+ SCTP_DATA_SENT,
+};
+
+/*
+ * 5.3.1.5 SCTP_SHUTDOWN_EVENT
+ *
+ * When a peer sends a SHUTDOWN, SCTP delivers this notification to
+ * inform the application that it should cease sending data.
+ */
+struct sctp_shutdown_event {
+ __u16 sse_type;
+ __u16 sse_flags;
+ __u32 sse_length;
+ sctp_assoc_t sse_assoc_id;
+};
+
+/*
+ * 5.3.1.6 SCTP_ADAPTION_INDICATION
+ *
+ * When a peer sends a Adaption Layer Indication parameter , SCTP
+ * delivers this notification to inform the application
+ * that of the peers requested adaption layer.
+ */
+struct sctp_adaption_event {
+ __u16 sai_type;
+ __u16 sai_flags;
+ __u32 sai_length;
+ __u32 sai_adaption_ind;
+ sctp_assoc_t sai_assoc_id;
+};
+
+/*
+ * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
+ *
+ * When a receiver is engaged in a partial delivery of a
+ * message this notification will be used to indicate
+ * various events.
+ */
+struct sctp_pdapi_event {
+ __u16 pdapi_type;
+ __u16 pdapi_flags;
+ __u32 pdapi_length;
+ __u32 pdapi_indication;
+ sctp_assoc_t pdapi_assoc_id;
+};
+
+enum { SCTP_PARTIAL_DELIVERY_ABORTED=0, };
+
+/*
+ * Described in Section 7.3
+ * Ancillary Data and Notification Interest Options
+ */
+struct sctp_event_subscribe {
+ __u8 sctp_data_io_event;
+ __u8 sctp_association_event;
+ __u8 sctp_address_event;
+ __u8 sctp_send_failure_event;
+ __u8 sctp_peer_error_event;
+ __u8 sctp_shutdown_event;
+ __u8 sctp_partial_delivery_event;
+ __u8 sctp_adaption_layer_event;
+};
+
+/*
+ * 5.3.1 SCTP Notification Structure
+ *
+ * The notification structure is defined as the union of all
+ * notification types.
+ *
+ */
+union sctp_notification {
+ struct {
+ __u16 sn_type; /* Notification type. */
+ __u16 sn_flags;
+ __u32 sn_length;
+ } sn_header;
+ struct sctp_assoc_change sn_assoc_change;
+ struct sctp_paddr_change sn_paddr_change;
+ struct sctp_remote_error sn_remote_error;
+ struct sctp_send_failed sn_send_failed;
+ struct sctp_shutdown_event sn_shutdown_event;
+ struct sctp_adaption_event sn_adaption_event;
+ struct sctp_pdapi_event sn_pdapi_event;
+};
+
+/* Section 5.3.1
+ * All standard values for sn_type flags are greater than 2^15.
+ * Values from 2^15 and down are reserved.
+ */
+
+enum sctp_sn_type {
+ SCTP_SN_TYPE_BASE = (1<<15),
+ SCTP_ASSOC_CHANGE,
+ SCTP_PEER_ADDR_CHANGE,
+ SCTP_SEND_FAILED,
+ SCTP_REMOTE_ERROR,
+ SCTP_SHUTDOWN_EVENT,
+ SCTP_PARTIAL_DELIVERY_EVENT,
+ SCTP_ADAPTION_INDICATION,
+};
+
+/* Notification error codes used to fill up the error fields in some
+ * notifications.
+ * SCTP_PEER_ADDRESS_CHAGE : spc_error
+ * SCTP_ASSOC_CHANGE : sac_error
+ * These names should be potentially included in the draft 04 of the SCTP
+ * sockets API specification.
+ */
+typedef enum sctp_sn_error {
+ SCTP_FAILED_THRESHOLD,
+ SCTP_RECEIVED_SACK,
+ SCTP_HEARTBEAT_SUCCESS,
+ SCTP_RESPONSE_TO_USER_REQ,
+ SCTP_INTERNAL_ERROR,
+ SCTP_SHUTDOWN_GUARD_EXPIRES,
+ SCTP_PEER_FAULTY,
+} sctp_sn_error_t;
+
+/*
+ * 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
+ *
+ * The protocol parameters used to initialize and bound retransmission
+ * timeout (RTO) are tunable. See [SCTP] for more information on how
+ * these parameters are used in RTO calculation.
+ */
+struct sctp_rtoinfo {
+ sctp_assoc_t srto_assoc_id;
+ __u32 srto_initial;
+ __u32 srto_max;
+ __u32 srto_min;
+};
+
+/*
+ * 7.1.2 Association Parameters (SCTP_ASSOCINFO)
+ *
+ * This option is used to both examine and set various association and
+ * endpoint parameters.
+ */
+struct sctp_assocparams {
+ sctp_assoc_t sasoc_assoc_id;
+ __u16 sasoc_asocmaxrxt;
+ __u16 sasoc_number_peer_destinations;
+ __u32 sasoc_peer_rwnd;
+ __u32 sasoc_local_rwnd;
+ __u32 sasoc_cookie_life;
+};
+
+/*
+ * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
+ *
+ * Requests that the peer mark the enclosed address as the association
+ * primary. The enclosed address must be one of the association's
+ * locally bound addresses. The following structure is used to make a
+ * set primary request:
+ */
+struct sctp_setpeerprim {
+ sctp_assoc_t sspp_assoc_id;
+ struct sockaddr_storage sspp_addr;
+};
+
+/*
+ * 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
+ *
+ * Requests that the local SCTP stack use the enclosed peer address as
+ * the association primary. The enclosed address must be one of the
+ * association peer's addresses. The following structure is used to
+ * make a set peer primary request:
+ */
+struct sctp_prim {
+ sctp_assoc_t ssp_assoc_id;
+ struct sockaddr_storage ssp_addr;
+};
+
+/*
+ * 7.1.11 Set Adaption Layer Indicator (SCTP_ADAPTION_LAYER)
+ *
+ * Requests that the local endpoint set the specified Adaption Layer
+ * Indication parameter for all future INIT and INIT-ACK exchanges.
+ */
+struct sctp_setadaption {
+ __u32 ssb_adaption_ind;
+};
+
+/*
+ * 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
+ *
+ * Applications can enable or disable heartbeats for any peer address
+ * of an association, modify an address's heartbeat interval, force a
+ * heartbeat to be sent immediately, and adjust the address's maximum
+ * number of retransmissions sent before an address is considered
+ * unreachable. The following structure is used to access and modify an
+ * address's parameters:
+ */
+struct sctp_paddrparams {
+ sctp_assoc_t spp_assoc_id;
+ struct sockaddr_storage spp_address;
+ __u32 spp_hbinterval;
+ __u16 spp_pathmaxrxt;
+};
+
+/*
+ * 7.2.2 Peer Address Information
+ *
+ * Applications can retrieve information about a specific peer address
+ * of an association, including its reachability state, congestion
+ * window, and retransmission timer values. This information is
+ * read-only. The following structure is used to access this
+ * information:
+ */
+struct sctp_paddrinfo {
+ sctp_assoc_t spinfo_assoc_id;
+ struct sockaddr_storage spinfo_address;
+ __s32 spinfo_state;
+ __u32 spinfo_cwnd;
+ __u32 spinfo_srtt;
+ __u32 spinfo_rto;
+ __u32 spinfo_mtu;
+};
+
+/* Peer addresses's state. */
+enum sctp_spinfo_state {
+ SCTP_INACTIVE,
+ SCTP_ACTIVE,
+};
+
+/*
+ * 7.2.1 Association Status (SCTP_STATUS)
+ *
+ * Applications can retrieve current status information about an
+ * association, including association state, peer receiver window size,
+ * number of unacked data chunks, and number of data chunks pending
+ * receipt. This information is read-only. The following structure is
+ * used to access this information:
+ */
+struct sctp_status {
+ sctp_assoc_t sstat_assoc_id;
+ __s32 sstat_state;
+ __u32 sstat_rwnd;
+ __u16 sstat_unackdata;
+ __u16 sstat_penddata;
+ __u16 sstat_instrms;
+ __u16 sstat_outstrms;
+ __u32 sstat_fragmentation_point;
+ struct sctp_paddrinfo sstat_primary;
+};
+
+/*
+ * 8.3, 8.5 get all peer/local addresses in an association.
+ * This parameter struct is used by SCTP_GET_PEER_ADDRS and
+ * SCTP_GET_LOCAL_ADDRS socket options used internally to implement
+ * sctp_getpaddrs() and sctp_getladdrs() API.
+ */
+struct sctp_getaddrs {
+ sctp_assoc_t assoc_id;
+ int addr_num;
+ struct sockaddr __user *addrs;
+};
+
+/* These are bit fields for msghdr->msg_flags. See section 5.1. */
+/* On user space Linux, these live in <bits/socket.h> as an enum. */
+enum sctp_msg_flags {
+ MSG_NOTIFICATION = 0x8000,
+#define MSG_NOTIFICATION MSG_NOTIFICATION
+};
+
+/*
+ * 8.1 sctp_bindx()
+ *
+ * The flags parameter is formed from the bitwise OR of zero or more of the
+ * following currently defined flags:
+ */
+#define SCTP_BINDX_ADD_ADDR 0x01
+#define SCTP_BINDX_REM_ADDR 0x02
+
+/* This is the structure that is passed as an argument(optval) to
+ * getsockopt(SCTP_SOCKOPT_PEELOFF).
+ */
+typedef struct {
+ sctp_assoc_t associd;
+ int sd;
+} sctp_peeloff_arg_t;
+
+#endif /* __net_sctp_user_h__ */