Merge master.kernel.org:/home/davem/BK/sctp-2.5

into home.transmeta.com:/home/torvalds/v2.5/linux

17 files changed, 4848 insertions, 3 deletions

diff --git a/include/linux/in.h b/include/linux/in.h
index f41a61dce932..eebfb0306d1b 100644
--- a/include/linux/in.h
+++ b/include/linux/in.h
@@ -37,11 +37,12 @@ enum {
 
   IPPROTO_IPV6	 = 41,		/* IPv6-in-IPv4 tunnelling		*/
 
-  IPPROTO_PIM    = 103,		/* Protocol Independent Multicast	*/
-
   IPPROTO_ESP = 50,            /* Encapsulation Security Payload protocol */
   IPPROTO_AH = 51,             /* Authentication Header protocol       */
+  IPPROTO_PIM    = 103,		/* Protocol Independent Multicast	*/
+
   IPPROTO_COMP   = 108,                /* Compression Header protocol */
+  IPPROTO_SCTP   = 132,		/* Stream Control Transport Protocol	*/
 
   IPPROTO_RAW	 = 255,		/* Raw IP packets			*/
   IPPROTO_MAX
diff --git a/include/linux/net.h b/include/linux/net.h
index 8cd440ce36d6..c84c7033fed1 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -137,6 +137,7 @@ extern int   	sock_sendmsg(struct socket *, struct msghdr *m, int len);
 extern int	sock_recvmsg(struct socket *, struct msghdr *m, int len, int flags);
 extern int	sock_readv_writev(int type, struct inode * inode, struct file * file,
 				  const struct iovec * iov, long count, long size);
+extern int 	sock_map_fd(struct socket *sock);
 
 extern int	net_ratelimit(void);
 extern unsigned long net_random(void);
diff --git a/include/linux/sctp.h b/include/linux/sctp.h
new file mode 100644
index 000000000000..b070fc1220e5
--- /dev/null
+++ b/include/linux/sctp.h
@@ -0,0 +1,590 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 International Business Machines, Corp.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001 Nokia, Inc.
+ * Copyright (c) 2001 La Monte H.P. Yarroll
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/linux/sctp.h,v 1.7 2002/07/17 16:13:50 jgrimm Exp $
+ * 
+ * Various protocol defined structures.  
+ * 
+ * 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 <sctp-developers-list@cig.mot.com>
+ * 
+ * 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>
+ *    Jon Grimm <jgrimm@us.ibm.com>
+ *    Xingang Guo <xingang.guo@intel.com>
+ *    randall@sctp.chicago.il.us
+ *    kmorneau@cisco.com
+ *    qxie1@email.mot.com
+ * 
+ * Any bugs reported given to us we will try to fix... any fixes shared will
+ * be incorporated into the next SCTP release.
+ */
+#ifndef __LINUX_SCTP_H__
+#define __LINUX_SCTP_H__
+
+#include <linux/in.h>		/* We need in_addr.  */
+#include <linux/in6.h>		/* We need in6_addr.  */
+
+
+/* Section 3.1.  SCTP Common Header Format */
+typedef struct sctphdr {
+	__u16 source;
+	__u16 dest;
+	__u32 vtag;
+	__u32 checksum;
+} sctp_sctphdr_t __attribute__((packed));
+
+/* Section 3.2.  Chunk Field Descriptions. */
+typedef struct sctp_chunkhdr {
+	__u8 type;
+	__u8 flags;
+	__u16 length;
+} sctp_chunkhdr_t __attribute__((packed));
+
+
+/* Section 3.2.  Chunk Type Values.
+ * [Chunk Type] identifies the type of information contained in the Chunk 
+ * Value field. It takes a value from 0 to 254. The value of 255 is 
+ * reserved for future use as an extension field. 
+ */
+typedef enum {
+	SCTP_CID_DATA			= 0,
+        SCTP_CID_INIT			= 1,
+        SCTP_CID_INIT_ACK		= 2,
+        SCTP_CID_SACK			= 3,
+        SCTP_CID_HEARTBEAT		= 4,
+        SCTP_CID_HEARTBEAT_ACK		= 5,
+        SCTP_CID_ABORT			= 6,
+        SCTP_CID_SHUTDOWN		= 7,
+        SCTP_CID_SHUTDOWN_ACK		= 8,
+        SCTP_CID_ERROR			= 9,
+        SCTP_CID_COOKIE_ECHO		= 10,
+        SCTP_CID_COOKIE_ACK	        = 11,
+        SCTP_CID_ECN_ECNE		= 12,
+        SCTP_CID_ECN_CWR		= 13,
+        SCTP_CID_SHUTDOWN_COMPLETE	= 14,
+
+	/* Use hex, as defined in ADDIP sec. 3.1 */
+	SCTP_CID_ASCONF			= 0xC1,
+	SCTP_CID_ASCONF_ACK		= 0x80,
+} sctp_cid_t; /* enum */
+
+
+/* Section 3.2  
+ *  Chunk Types are encoded such that the highest-order two bits specify
+ *  the action that must be taken if the processing endpoint does not
+ *  recognize the Chunk Type.
+ */
+typedef enum {
+	SCTP_CID_ACTION_DISCARD     = 0x00,
+	SCTP_CID_ACTION_DISCARD_ERR = 0x40,
+	SCTP_CID_ACTION_SKIP        = 0x80,
+	SCTP_CID_ACTION_SKIP_ERR    = 0xc0,
+} sctp_cid_action_t; 
+
+enum { SCTP_CID_ACTION_MASK = 0xc0, };
+
+/* This flag is used in Chunk Flags for ABORT and SHUTDOWN COMPLETE.
+ *
+ * 3.3.7 Abort Association (ABORT) (6):
+ *    The T bit is set to 0 if the sender had a TCB that it destroyed.
+ *    If the sender did not have a TCB it should set this bit to 1.
+ */
+enum { SCTP_CHUNK_FLAG_T = 0x01 };
+
+/*
+ *  Set the T bit
+ *
+ *      0                   1                   2                   3
+ *      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |   Type = 14   |Reserved     |T|      Length = 4               |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * 
+ * Chunk Flags: 8 bits
+ *   
+ *   Reserved:  7 bits
+ *     Set to 0 on transmit and ignored on receipt.
+ * 
+ *   T bit:  1 bit
+ *     The T bit is set to 0 if the sender had a TCB that it destroyed. If
+ *     the sender did NOT have a TCB it should set this bit to 1.
+ * 
+ * Note: Special rules apply to this chunk for verification, please 
+ * see Section 8.5.1 for details.
+ */
+
+#define sctp_test_T_bit(c)    ((c)->chunk_hdr->flags & SCTP_CHUNK_FLAG_T)
+
+/* RFC 2960 
+ * Section 3.2.1 Optional/Variable-length Parmaeter Format.
+ */
+
+typedef struct sctp_paramhdr {
+	__u16 type;
+	__u16 length;
+} sctp_paramhdr_t __attribute((packed));
+
+typedef enum {
+
+	/* RFC 2960 Section 3.3.5 */
+	SCTP_PARAM_HEATBEAT_INFO		= __constant_htons(1),  
+	/* RFC 2960 Section 3.3.2.1 */
+	SCTP_PARAM_IPV4_ADDRESS			= __constant_htons(5), 
+	SCTP_PARAM_IPV6_ADDRESS			= __constant_htons(6), 
+	SCTP_PARAM_STATE_COOKIE			= __constant_htons(7),  
+	SCTP_PARAM_UNRECOGNIZED_PARAMETERS	= __constant_htons(8),  
+	SCTP_PARAM_COOKIE_PRESERVATIVE		= __constant_htons(9),  
+	SCTP_PARAM_HOST_NAME_ADDRESS		= __constant_htons(11), 
+	SCTP_PARAM_SUPPORTED_ADDRESS_TYPES	= __constant_htons(12), 
+	SCTP_PARAM_ECN_CAPABLE			= __constant_htons(0x8000),
+
+	/* Add-IP Extension. Section 3.2 */
+	SCTP_PARAM_ADD_IP		= __constant_htons(0xc001),  
+	SCTP_PARAM_DEL_IP		= __constant_htons(0xc002),  
+	SCTP_PARAM_ERR_CAUSE		= __constant_htons(0xc003),  
+	SCTP_PARAM_SET_PRIMARY		= __constant_htons(0xc004),  
+	SCTP_PARAM_SUCCESS_REPORT	= __constant_htons(0xc005),  
+	SCTP_PARAM_ADAPTION_LAYER_IND   = __constant_htons(0xc006),
+
+} sctp_param_t; /* enum */
+
+
+/* RFC 2960 Section 3.2.1
+ *  The Parameter Types are encoded such that the highest-order two bits
+ *  specify the action that must be taken if the processing endpoint does
+ *  not recognize the Parameter Type.
+ *
+ */
+typedef enum {
+	SCTP_PARAM_ACTION_DISCARD     = __constant_htons(0x0000),
+	SCTP_PARAM_ACTION_DISCARD_ERR = __constant_htons(0x4000),
+	SCTP_PARAM_ACTION_SKIP        = __constant_htons(0x8000),
+	SCTP_PARAM_ACTION_SKIP_ERR    = __constant_htons(0xc000),
+} sctp_param_action_t; 
+
+
+/* RFC 2960 Section 3.3.1 Payload Data (DATA) (0) */
+
+typedef struct sctp_datahdr {
+	__u32 tsn;
+	__u16 stream;
+	__u16 ssn;
+	__u32 ppid;
+	__u8  payload[0];
+} sctp_datahdr_t __attribute__((packed));
+
+typedef struct sctp_data_chunk {
+        sctp_chunkhdr_t chunk_hdr;
+        sctp_datahdr_t  data_hdr;
+} sctp_data_chunk_t __attribute__((packed));
+
+/* DATA Chuck Specific Flags */
+enum {
+	SCTP_DATA_MIDDLE_FRAG	= 0x00,
+	SCTP_DATA_LAST_FRAG	= 0x01,
+	SCTP_DATA_FIRST_FRAG	= 0x02,
+	SCTP_DATA_NOT_FRAG	= 0x03,
+	SCTP_DATA_UNORDERED	= 0x04,
+};
+enum { SCTP_DATA_FRAG_MASK = 0x03, }; 
+
+
+/* RFC 2960 Section 3.3.2 Initiation (INIT) (1)
+ *
+ *  This chunk is used to initiate a SCTP association between two
+ *  endpoints.
+ */  
+typedef struct sctp_inithdr {
+	__u32 init_tag;
+	__u32 a_rwnd;
+	__u16 num_outbound_streams;
+	__u16 num_inbound_streams;
+	__u32 initial_tsn;
+	__u8  params[0];
+} sctp_inithdr_t __attribute__((packed));
+
+typedef struct sctp_init_chunk {
+	sctp_chunkhdr_t chunk_hdr;
+	sctp_inithdr_t init_hdr;
+} sctp_init_chunk_t __attribute__((packed));
+
+
+/* Section 3.3.2.1. IPv4 Address Parameter (5) */
+typedef struct sctp_ipv4addr_param {
+	sctp_paramhdr_t param_hdr;
+	struct in_addr  addr;
+} sctp_ipv4addr_param_t __attribute__((packed));
+
+/* Section 3.3.2.1. IPv6 Address Parameter (6) */
+typedef struct sctp_ipv6addr_param {
+	sctp_paramhdr_t param_hdr;
+	struct in6_addr addr;
+} sctp_ipv6addr_param_t __attribute__((packed));
+	
+/* Section 3.3.2.1 Cookie Preservative (9) */
+typedef struct sctp_cookie_preserve_param {
+	sctp_paramhdr_t param_hdr;
+	uint32_t        lifespan_increment;
+} sctp_cookie_preserve_param_t __attribute__((packed));
+
+/* Section 3.3.2.1 Host Name Address (11) */
+typedef struct sctp_hostname_param {
+	sctp_paramhdr_t param_hdr;
+	uint8_t hostname[0];
+} sctp_hostname_param_t __attribute__((packed));
+
+/* Section 3.3.2.1 Supported Address Types (12) */
+typedef struct sctp_supported_addrs_param {
+	sctp_paramhdr_t param_hdr;
+	uint16_t types[0];
+} sctp_supported_addrs_param_t __attribute__((packed));
+
+/* Appendix A. ECN Capable (32768) */
+typedef struct sctp_ecn_capable_param {
+	sctp_paramhdr_t param_hdr;
+} sctp_ecn_capable_param_t __attribute__((packed));
+
+
+
+/* RFC 2960.  Section 3.3.3 Initiation Acknowledgement (INIT ACK) (2):
+ *   The INIT ACK chunk is used to acknowledge the initiation of an SCTP
+ *   association.
+ */
+typedef sctp_init_chunk_t sctp_initack_chunk_t;
+
+/* Section 3.3.3.1 State Cookie (7) */
+typedef struct sctp_cookie_param {
+	sctp_paramhdr_t p;
+	__u8 body[0];
+} sctp_cookie_param_t __attribute__((packed));
+
+/* Section 3.3.3.1 Unrecognized Parameters (8) */
+typedef struct sctp_unrecognized_param {
+	sctp_paramhdr_t param_hdr;
+	sctp_paramhdr_t unrecognized;
+} sctp_unrecognized_param_t __attribute__((packed));
+
+
+
+/*
+ * 3.3.4 Selective Acknowledgement (SACK) (3):
+ *
+ *  This chunk is sent to the peer endpoint to acknowledge received DATA
+ *  chunks and to inform the peer endpoint of gaps in the received
+ *  subsequences of DATA chunks as represented by their TSNs.
+ */
+
+typedef struct sctp_gap_ack_block {
+	__u16 start;
+	__u16 end;
+} sctp_gap_ack_block_t __attribute__((packed));
+
+typedef uint32_t sctp_dup_tsn_t;
+
+typedef union {
+	sctp_gap_ack_block_t	gab;
+        sctp_dup_tsn_t		dup;
+} sctp_sack_variable_t;
+
+typedef struct sctp_sackhdr {
+	__u32 cum_tsn_ack;
+	__u32 a_rwnd;
+	__u16 num_gap_ack_blocks;
+	__u16 num_dup_tsns;
+	sctp_sack_variable_t variable[0];
+} sctp_sackhdr_t __attribute__((packed));
+
+typedef struct sctp_sack_chunk {
+	sctp_chunkhdr_t chunk_hdr;
+	sctp_sackhdr_t sack_hdr;
+} sctp_sack_chunk_t __attribute__((packed));
+
+
+/* RFC 2960.  Section 3.3.5 Heartbeat Request (HEARTBEAT) (4):
+ *
+ *  An endpoint should send this chunk to its peer endpoint to probe the
+ *  reachability of a particular destination transport address defined in
+ *  the present association.
+ */
+
+typedef struct sctp_heartbeathdr {
+	sctp_paramhdr_t info;
+} sctp_heartbeathdr_t __attribute__((packed));
+
+typedef struct sctp_heartbeat_chunk {
+	sctp_chunkhdr_t chunk_hdr;
+	sctp_heartbeathdr_t hb_hdr;
+} sctp_heartbeat_chunk_t __attribute__((packed));
+	
+  
+/* For the abort and shutdown ACK we must carry the init tag in the
+ * common header. Just the common header is all that is needed with a
+ * chunk descriptor.
+ */
+typedef struct sctp_abort_chunk {
+        sctp_chunkhdr_t uh;
+} sctp_abort_chunkt_t __attribute__((packed));
+
+
+/* For the graceful shutdown we must carry the tag (in common header)
+ * and the highest consecutive acking value.
+ */
+typedef struct sctp_shutdownhdr {
+	__u32 cum_tsn_ack;
+} sctp_shutdownhdr_t __attribute__((packed));
+
+struct sctp_shutdown_chunk_t {
+        sctp_chunkhdr_t    chunk_hdr;
+        sctp_shutdownhdr_t shutdown_hdr;
+} __attribute__((packed));
+        
+
+
+/* RFC 2960.  Section 3.3.10 Operation Error (ERROR) (9) */
+
+typedef struct sctp_errhdr {
+	__u16 cause;
+	__u16 length;
+	__u8  variable[0];
+} sctp_errhdr_t __attribute__((packed));
+
+typedef struct sctp_operr_chunk {
+        sctp_chunkhdr_t chunk_hdr;
+	sctp_errhdr_t   err_hdr;
+} sctp_operr_chunk_t __attribute__((packed));
+
+/* RFC 2960 3.3.10 - Operation Error
+ *
+ * Cause Code: 16 bits (unsigned integer)
+ *
+ *     Defines the type of error conditions being reported.
+ *    Cause Code
+ *     Value           Cause Code
+ *     ---------      ----------------
+ *      1              Invalid Stream Identifier
+ *      2              Missing Mandatory Parameter
+ *      3              Stale Cookie Error
+ *      4              Out of Resource
+ *      5              Unresolvable Address
+ *      6              Unrecognized Chunk Type
+ *      7              Invalid Mandatory Parameter
+ *      8              Unrecognized Parameters
+ *      9              No User Data
+ *     10              Cookie Received While Shutting Down
+ */
+typedef enum {
+
+	SCTP_ERROR_NO_ERROR	   = __constant_htons(0x00), 
+	SCTP_ERROR_INV_STRM	   = __constant_htons(0x01), 
+	SCTP_ERROR_MISS_PARAM 	   = __constant_htons(0x02), 
+	SCTP_ERROR_STALE_COOKIE	   = __constant_htons(0x03),
+	SCTP_ERROR_NO_RESOURCE 	   = __constant_htons(0x04),
+	SCTP_ERROR_DNS_FAILED      = __constant_htons(0x05),
+	SCTP_ERROR_UNKNOWN_CHUNK   = __constant_htons(0x06),
+	SCTP_ERROR_INV_PARAM       = __constant_htons(0x07),
+	SCTP_ERROR_UNKNOWN_PARAM   = __constant_htons(0x08),
+	SCTP_ERROR_NO_DATA         = __constant_htons(0x09),
+	SCTP_ERROR_COOKIE_IN_SHUTDOWN = __constant_htons(0x0a),
+
+
+	/* SCTP Implementation Guide: 
+	 *  11              Restart of an association with new addresses
+	 *  12              User Initiated Abort
+	 */
+
+	SCTP_ERROR_RESTART         = __constant_htons(0x0b),
+	SCTP_ERROR_USER_ABORT      = __constant_htons(0x0c),
+
+	/* ADDIP Section 3.3  New Error Causes
+	 *
+	 * Four new Error Causes are added to the SCTP Operational Errors,
+	 * primarily for use in the ASCONF-ACK chunk.
+	 *
+	 * Value          Cause Code
+	 * ---------      ----------------
+	 * 0x0100          Request to Delete Last Remaining IP Address.
+	 * 0x0101          Operation Refused Due to Resource Shortage.
+	 * 0x0102          Request to Delete Source IP Address.
+	 * 0x0103          Association Aborted due to illegal ASCONF-ACK
+	 */
+	SCTP_ERROR_DEL_LAST_IP	= __constant_htons(0x0100),	
+	SCTP_ERROR_RSRC_LOW	= __constant_htons(0x0101),	
+	SCTP_ERROR_DEL_SRC_IP	= __constant_htons(0x0102),	
+	SCTP_ERROR_ASCONF_ACK   = __constant_htons(0x0103),
+
+} sctp_error_t;
+
+
+
+/* RFC 2960.  Appendix A.  Explicit Congestion Notification. 
+ *   Explicit Congestion Notification Echo (ECNE) (12)
+ */
+typedef struct sctp_ecnehdr {
+	__u32 lowest_tsn;
+} sctp_ecnehdr_t;
+
+typedef struct sctp_ecne_chunk {
+	sctp_chunkhdr_t chunk_hdr;
+	sctp_ecnehdr_t ence_hdr;
+} sctp_ecne_chunk_t __attribute__((packed));
+
+/* RFC 2960.  Appendix A.  Explicit Congestion Notification. 
+ *   Congestion Window Reduced (CWR) (13)
+ */
+typedef struct sctp_cwrhdr {
+	__u32 lowest_tsn;
+} sctp_cwrhdr_t;
+
+typedef struct sctp_cwr_chunk {
+	sctp_chunkhdr_t chunk_hdr;
+	sctp_cwrhdr_t cwr_hdr;
+} sctp_cwr_chunk_t __attribute__((packed));
+
+
+/* FIXME:  Cleanup needs to continue below this line. */
+
+/*
+ * ADDIP Section 3.1 New Chunk Types
+ */
+
+
+/* ADDIP Section 3.1.1
+ * 
+ * ASCONF-Request Correlation ID: 32 bits (unsigned integer)
+ * 
+ * This is an opaque integer assigned by the sender to identify each
+ * request parameter. It is in host byte order and is only meaningful
+ * to the sender. The receiver of the ASCONF Chunk will copy this 32
+ * bit value into the ASCONF Correlation ID field of the
+ * ASCONF-ACK. The sender of the ASCONF can use this same value in the
+ * ASCONF-ACK to find which request the response is for.
+ * 
+ * ASCONF Parameter: TLV format
+ * 
+ * Each Address configuration change is represented by a TLV parameter
+ * as defined in Section 3.2. One or more requests may be present in
+ * an ASCONF Chunk.
+ */
+typedef struct {
+	__u32	correlation;
+	sctp_paramhdr_t p;
+	__u8		payload[0];
+} sctpAsconfReq_t;
+
+/* ADDIP
+ * 3.1.1  Address/Stream Configuration Change Chunk (ASCONF)
+ * 
+ * This chunk is used to communicate to the remote endpoint one of the
+ * configuration change requests that MUST be acknowledged.  The
+ * information carried in the ASCONF Chunk uses the form of a
+ * Tag-Length-Value (TLV), as described in "3.2.1
+ * Optional/Variable-length Parameter Format" in [RFC2960], for all
+ * variable parameters.
+ */
+typedef struct {
+	__u32	serial;
+	__u8	reserved[3];
+	__u8	addr_type;
+	__u32	addr[4];
+	sctpAsconfReq_t requests[0];
+} sctpAsconf_t;
+  
+/* ADDIP
+ * 3.1.2 Address/Stream Configuration Acknowledgment Chunk (ASCONF-ACK)
+ * 
+ * ASCONF-Request Correlation ID: 32 bits (unsigned integer)
+ * 
+ * This value is copied from the ASCONF Correlation ID received in the
+ * ASCONF Chunk. It is used by the receiver of the ASCONF-ACK to identify
+ * which ASCONF parameter this response is associated with.
+ * 
+ * ASCONF Parameter Response : TLV format
+ * 
+ * The ASCONF Parameter Response is used in the ASCONF-ACK to report
+ * status of ASCONF processing. By default, if a responding endpoint
+ * does not include any Error Cause, a success is indicated. Thus a
+ * sender of an ASCONF-ACK MAY indicate complete success of all TLVs in
+ * an ASCONF by returning only the Chunk Type, Chunk Flags, Chunk Length
+ * (set to 8) and the Serial Number.
+ */
+typedef union {
+	struct {
+		__u32		correlation;
+		sctp_paramhdr_t header;	/* success report */
+	} success;
+	struct {
+		__u32		correlation;
+		sctp_paramhdr_t header;	/* error cause indication */
+		sctp_paramhdr_t errcause;
+		uint8_t request[0];	/* original request from ASCONF */
+	} error;
+#define __correlation	success.correlation
+#define __header	success.header
+#define __cause		error.errcause
+#define __request	error.request
+}  sctpAsconfAckRsp_t;
+
+/* ADDIP
+ * 3.1.2 Address/Stream Configuration Acknowledgment Chunk (ASCONF-ACK)
+ * 
+ * This chunk is used by the receiver of an ASCONF Chunk to
+ * acknowledge the reception. It carries zero or more results for any
+ * ASCONF Parameters that were processed by the receiver.
+ */
+typedef struct {
+	__u32	serial;
+	sctpAsconfAckRsp_t responses[0];
+} sctpAsconfAck_t;
+
+/*********************************************************************
+ * Internal structures
+ *
+ * These are data structures which never go out on the wire.
+ *********************************************************************/
+
+/* What is this data structure for?  The TLV isn't one--it is just a
+ * value.  Perhaps this data structure ought to have a type--otherwise
+ * it is not unambigiously parseable.  --piggy
+ */
+typedef struct {
+	struct list_head hook;
+	int length;	/* length of the TLV */
+
+	/* the actually TLV to be copied into ASCONF_ACK */ 
+	sctpAsconfAckRsp_t TLV;
+} sctpAsconfAckRspNode_t;
+
+
+
+
+#endif /* __LINUX_SCTP_H__ */
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 74303f129fdd..f8e90303576d 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -227,6 +227,7 @@ struct ucred {
 #define SOL_UDP		17
 #define SOL_IPV6	41
 #define SOL_ICMPV6	58
+#define SOL_SCTP	132
 #define SOL_RAW		255
 #define SOL_IPX		256
 #define SOL_AX25	257
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 07eed48ea3f8..4c598d745e2e 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -172,6 +172,7 @@ enum
 	NET_TR=14,
 	NET_DECNET=15,
 	NET_ECONET=16,
+	NET_SCTP=17, 
 };
 
 /* /proc/sys/kernel/random */
@@ -516,6 +517,21 @@ enum {
 	NET_DECNET_CONF_DEV_STATE = 7
 };
 
+/* /proc/sys/net/sctp */
+enum {
+	NET_SCTP_RTO_INITIAL = 1,
+	NET_SCTP_RTO_MIN     = 2,
+	NET_SCTP_RTO_MAX     = 3,
+	NET_SCTP_RTO_ALPHA   = 4,
+	NET_SCTP_RTO_BETA    = 5,
+	NET_SCTP_VALID_COOKIE_LIFE       =  6,
+	NET_SCTP_ASSOCIATION_MAX_RETRANS =  7,
+	NET_SCTP_PATH_MAX_RETRANS        =  8,
+	NET_SCTP_MAX_INIT_RETRANSMITS    =  9,
+	NET_SCTP_HB_INTERVAL             = 10,
+	NET_SCTP_MAX_BURST               = 11,
+};
+
 /* CTL_PROC names: */
 
 /* CTL_FS names: */
diff --git a/include/net/inet_common.h b/include/net/inet_common.h
index 87b3fd324347..bbb1fa70099e 100644
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -43,6 +43,14 @@ extern void			inet_sock_release(struct sock *sk);
 extern void			inet_sock_destruct(struct sock *sk);
 extern atomic_t			inet_sock_nr;
 
+extern int			inet_bind(struct socket *sock, 
+					  struct sockaddr *uaddr, int addr_len);
+extern int			inet_getname(struct socket *sock, 
+					     struct sockaddr *uaddr, 
+					     int *uaddr_len, int peer);
+extern int			inet_ioctl(struct socket *sock, 
+					   unsigned int cmd, unsigned long arg);
+
 #endif
 
 
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 55ca37370540..1c7a736a2796 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -4,7 +4,7 @@
  *	Authors:
  *	Pedro Roque		<roque@di.fc.ul.pt>
  *
- *	$Id: ipv6.h,v 1.23 2000/12/13 18:31:48 davem Exp $
+ *	$Id: ipv6.h,v 1.1 2002/05/20 15:13:07 jgrimm Exp $
  *
  *	This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
@@ -336,6 +336,14 @@ extern void			ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, u16
 						u32 info, u8 *payload);
 extern void			ipv6_local_error(struct sock *sk, int err, struct flowi *fl, u32 info);
 
+extern int inet6_release(struct socket *sock);
+extern int inet6_bind(struct socket *sock, struct sockaddr *uaddr, 
+		      int addr_len);
+extern int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
+			 int *uaddr_len, int peer);
+extern int inet6_ioctl(struct socket *sock, unsigned int cmd, 
+		       unsigned long arg);
+
 #endif /* __KERNEL__ */
 #endif /* _NET_IPV6_H */
 
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
new file mode 100644
index 000000000000..185e39ee064c
--- /dev/null
+++ b/include/net/sctp/sctp.h
@@ -0,0 +1,509 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 International Business Machines, Corp.
+ * Copyright (c) 2001 Intel Corp.
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * $Id: sctp.h,v 1.40 2002/08/21 18:34:03 jgrimm Exp $
+ * 
+ * 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>
+ * 
+ * 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>
+
+#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/sctp/sctp_structs.h>
+#include <net/sctp/sctp_constants.h>
+#include <net/sctp/sctp_sm.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
+
+/* 
+ * Function declarations. 
+ */
+
+/*
+ * sctp_protocol.c 
+ */
+extern sctp_protocol_t sctp_proto;
+extern struct sock *sctp_get_ctl_sock(void);
+extern int sctp_copy_local_addr_list(sctp_protocol_t *, sctp_bind_addr_t *,
+				     sctp_scope_t, int priority, int flags);
+
+
+/*
+ * sctp_socket.c
+ */
+extern int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
+extern int sctp_inet_listen(struct socket *sock, int backlog);
+extern void sctp_write_space(struct sock *sk);
+extern unsigned int sctp_poll(struct file *file, struct socket *sock,
+		poll_table *wait);
+
+/*
+ * sctp_primitive.c
+ */
+extern int sctp_primitive_ASSOCIATE(sctp_association_t *, void *arg);
+extern int sctp_primitive_SHUTDOWN(sctp_association_t *, void *arg);
+extern int sctp_primitive_ABORT(sctp_association_t *, void *arg);
+extern int sctp_primitive_SEND(sctp_association_t *, void *arg);
+
+
+/*
+ * sctp_crc32c.c
+ */
+extern __u32 count_crc(__u8 *ptr, __u16 count);
+
+/*
+ * sctp_input.c
+ */
+extern int sctp_rcv(struct sk_buff *skb);
+extern void sctp_v4_err(struct sk_buff *skb, u32 info);
+extern void sctp_hash_established(sctp_association_t *);
+extern void __sctp_hash_established(sctp_association_t *);
+extern void sctp_unhash_established(sctp_association_t *);
+extern void __sctp_unhash_established(sctp_association_t *);
+extern void sctp_hash_endpoint(sctp_endpoint_t *);
+extern void __sctp_hash_endpoint(sctp_endpoint_t *);
+extern void sctp_unhash_endpoint(sctp_endpoint_t *);
+extern void __sctp_unhash_endpoint(sctp_endpoint_t *);
+
+/*
+ * sctp_hashdriver.c
+ */
+extern void sctp_hash_digest(const char *secret, const int secret_len,
+			     const char *text, const int text_len,
+			     __u8 *digest);
+
+/*
+ *  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_busy(sk) ((sk)->lock.users)
+#define SCTP_SOCK_SLEEP_PRE(sk) SOCK_SLEEP_PRE(sk)
+#define SCTP_SOCK_SLEEP_POST(sk) SOCK_SLEEP_POST(sk)
+
+
+/* Determine if this is a valid kernel address.  */
+static inline int sctp_is_valid_kaddr(unsigned long addr)
+{
+	struct page *page;
+
+	/* Make sure the address is not in the user address space. */
+	if (addr < PAGE_OFFSET)
+		return 0;
+
+	page = virt_to_page(addr);
+
+	/* Is this page valid? */
+	if (!virt_addr_valid(addr) || PageReserved(page))
+		return 0;
+
+	return 1;
+}
+
+#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_addr;
+
+/* 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}
+
+extern void sctp_dbg_objcnt_init(void);
+extern 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
+extern void sctp_sysctl_register(void);
+extern void sctp_sysctl_unregister(void);
+#else
+static inline void sctp_sysctl_register(void) { return; }
+static inline void sctp_sysctl_unregister(void) { return; }
+#endif
+
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+extern int sctp_v6_init(void);
+extern void sctp_v6_exit(void);
+
+static inline int sctp_ipv6_addr_type(const struct in6_addr *addr)
+{
+	return ipv6_addr_type((struct in6_addr*) addr);
+}
+
+#define SCTP_SAT_LEN (sizeof(sctp_paramhdr_t) + 2 * sizeof(__u16))
+
+/* Note: These V6 macros are obsolescent.  */
+/* Use this macro to enclose code fragments which are V6-dependent. */
+#define SCTP_V6(m...)	m
+#define SCTP_V6_SUPPORT 1
+
+#else /* #ifdef defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
+
+#define sctp_ipv6_addr_type(a) 0
+#define SCTP_SAT_LEN (sizeof(sctp_paramhdr_t) + 1 * sizeof(__u16))
+#define SCTP_V6(m...) /* Do nothing. */
+#undef SCTP_V6_SUPPORT
+
+static inline int sctp_v6_init(void) { return 0; }
+static inline void sctp_v6_exit(void) { return; }
+
+#endif /* #ifdef defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
+
+
+/* Map an association to an assoc_id. */
+static inline sctp_assoc_t sctp_assoc2id(const sctp_association_t *asoc)
+{
+	return (sctp_assoc_t) asoc;
+}
+
+/* Look up the association by its id.  */
+static inline sctp_association_t *sctp_id2assoc(const struct sock *sk, sctp_assoc_t id)
+{
+	sctp_association_t *asoc = NULL;
+
+	/* First, verify that this is a kernel address. */
+	if (sctp_is_valid_kaddr((unsigned long) id)) {
+		sctp_association_t *temp = (sctp_association_t *) id;
+
+		/* Verify that this _is_ an sctp_association_t
+		 * data structure and if so, that the socket matches.
+		 */
+		if ((SCTP_ASSOC_EYECATCHER == temp->eyecatcher) &&
+		    (temp->base.sk == sk))
+			asoc = temp;
+	}
+
+	return asoc;
+}
+
+/* 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)
+{
+	int flags __attribute__ ((unused));
+
+	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;
+}
+
+/* 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;
+}
+
+
+/* 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))
+
+/* Stolen from net/profile.h.  Using it from there is more grief than
+ * it is worth.
+ */
+static inline void tv_add(const struct timeval *entered, struct timeval *leaved)
+{
+	time_t usecs = leaved->tv_usec + entered->tv_usec;
+	time_t secs = leaved->tv_sec + entered->tv_sec;
+
+	if (usecs >= 1000000) {
+		usecs -= 1000000;
+		secs++;
+	}
+	leaved->tv_sec = secs;
+	leaved->tv_usec = usecs;
+}
+
+
+/* External references. */
+
+extern struct proto sctp_prot;
+extern struct proc_dir_entry *proc_net_sctp;
+extern void sctp_put_port(struct sock *sk);
+
+/* Static inline functions. */
+
+/* Return the SCTP protocol structure. */
+static inline sctp_protocol_t *sctp_get_protocol(void)
+{
+	return &sctp_proto;
+}
+
+/* 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)
+{
+	sctp_protocol_t *sctp_proto = sctp_get_protocol();
+	return (lport & (sctp_proto->port_hashsize - 1));
+}
+
+/* This is the hash function for the endpoint hash table. */
+static inline int sctp_ep_hashfn(__u16 lport)
+{
+	sctp_protocol_t *sctp_proto = sctp_get_protocol();
+	return (lport & (sctp_proto->ep_hashsize - 1));
+}
+
+/* This is the hash function for the association hash table. */
+static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
+{
+	sctp_protocol_t *sctp_proto = sctp_get_protocol();
+	int h = (lport << 16) + rport;
+	h ^= h>>8;
+	return (h & (sctp_proto->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)
+{
+	sctp_protocol_t *sctp_proto = sctp_get_protocol();
+	int h = (lport << 16) + rport;
+	h ^= vtag;
+	return (h & (sctp_proto->assoc_hashsize-1));
+}
+
+/* WARNING: Do not change the layout of the members in sctp_sock! */
+struct sctp_sock {
+	struct sock	  sk;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	struct ipv6_pinfo *pinet6;
+#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */
+	struct inet_opt	  inet;
+	struct sctp_opt	  sctp;
+};
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+struct sctp6_sock {
+	struct sock	  sk;
+	struct ipv6_pinfo *pinet6;
+	struct inet_opt	  inet;
+	struct sctp_opt	  sctp;
+	struct ipv6_pinfo inet6;
+};
+#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */
+
+#define sctp_sk(__sk) (&((struct sctp_sock *)__sk)->sctp)
+
+#endif /* __net_sctp_h__ */
diff --git a/include/net/sctp/sctp_command.h b/include/net/sctp/sctp_command.h
new file mode 100644
index 000000000000..4fd50d56fefb
--- /dev/null
+++ b/include/net/sctp/sctp_command.h
@@ -0,0 +1,213 @@
+/* SCTP kernel reference Implementation Copyright (C) 1999-2001
+ * Cisco, Motorola, and IBM
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_command.h,v 1.19 2002/08/16 19:30:49 jgrimm Exp $
+ * 
+ * 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>
+ * 
+ * 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/sctp_constants.h>
+#include <net/sctp/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_REPORT_BIGGAP, /* Narc on a TSN (it was too high).  */
+	SCTP_CMD_SET_BIND_ADDR, /* Set the association bind_addr.  */
+	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_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_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;
+	sctp_chunk_t *chunk;
+	sctp_association_t *asoc;
+	sctp_transport_t *transport;
+	sctp_bind_addr_t  *bp;
+	sctp_init_chunk_t *init;
+	sctp_ulpevent_t *ulpevent;
+	sctp_packet_t *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,	sctp_chunk_t *, chunk)
+SCTP_ARG_CONSTRUCTOR(ASOC,	sctp_association_t *, asoc)
+SCTP_ARG_CONSTRUCTOR(TRANSPORT,	sctp_transport_t *, transport)
+SCTP_ARG_CONSTRUCTOR(BA,	sctp_bind_addr_t *, bp)
+SCTP_ARG_CONSTRUCTOR(PEER_INIT,	sctp_init_chunk_t *, init)
+SCTP_ARG_CONSTRUCTOR(ULPEVENT,  sctp_ulpevent_t *, ulpevent)
+SCTP_ARG_CONSTRUCTOR(PACKET,	sctp_packet_t *, 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;
+
+
+/* Create a new sctp_command_sequence.
+ * Return NULL if creating a new sequence fails.
+ */
+sctp_cmd_seq_t *sctp_new_cmd_seq(int priority);
+
+/* 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);
+
+/* Rewind an sctp_cmd_seq_t to iterate from the start.
+ * Return 0 if the rewind fails.
+ */
+int sctp_rewind_sequence(sctp_cmd_seq_t *seq);
+
+/* 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);
+
+/* Dispose of a command sequence.  */
+void sctp_free_cmd_seq(sctp_cmd_seq_t *seq);
+
+#endif /* __net_sctp_command_h__ */
+
diff --git a/include/net/sctp/sctp_constants.h b/include/net/sctp/sctp_constants.h
new file mode 100644
index 000000000000..58e910dd87da
--- /dev/null
+++ b/include/net/sctp/sctp_constants.h
@@ -0,0 +1,453 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001-2002 International Business Machines Corp.
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * This file is part of the implementation of the add-IP extension,
+ * based on <draft-ietf-tsvwg-addip-sctp-02.txt> June 29, 2001,
+ * for the SCTP kernel reference Implementation.
+ * 
+ * 
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_constants.h,v 1.11 2002/07/26 22:52:32 jgrimm Exp $
+ * 
+ * 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>
+ * 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.
+ * 
+ * There are still LOTS of bugs in this code... I always run on the motto
+ * "it is a wonder any code ever works :)"
+ * 
+ * 
+ */
+
+#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/sctp_user.h>
+
+/* What a hack!  Jiminy Cricket!  */
+enum { SCTP_MAX_STREAM = 10 };
+
+/* Define the amount of space to reserve for SCTP, IP, LL.
+ * There is a little bit of waste that we are always allocating
+ * for ipv6 headers, but this seems worth the simplicity.
+ */
+
+#define SCTP_IP_OVERHEAD ((sizeof(struct sctphdr)\
+                          + sizeof(struct ipv6hdr)\
+                          + MAX_HEADER))
+
+/* Define the amount of space to reserve for SCTP, IP, LL.
+ * There is a little bit of waste that we are always allocating
+ * for ipv6 headers, but this seems worth the simplicity.
+ */
+
+#define SCTP_IP_OVERHEAD ((sizeof(struct sctphdr)\
+                          + sizeof(struct ipv6hdr)\
+                          + MAX_HEADER))
+
+/* 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)
+
+
+/* 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_HEARTBEAT,
+	SCTP_EVENT_TIMEOUT_SACK,
+	SCTP_EVENT_TIMEOUT_AUTOCLOSE,
+	SCTP_EVENT_TIMEOUT_PMTU_RAISE,
+
+} sctp_event_timeout_t;
+
+#define SCTP_EVENT_TIMEOUT_MAX		SCTP_EVENT_TIMEOUT_PMTU_RAISE
+#define SCTP_NUM_TIMEOUT_TYPES		(SCTP_EVENT_TIMEOUT_MAX + 1)
+
+typedef enum {
+
+	SCTP_EVENT_NO_PENDING_TSN = 0,
+	SCTP_EVENT_ICMP_UNREACHFRAG,
+
+} sctp_event_other_t;
+
+#define SCTP_EVENT_OTHER_MAX		SCTP_EVENT_ICMP_UNREACHFRAG
+#define SCTP_NUM_OTHER_TYPES		(SCTP_EVENT_OTHER_MAX + 1)
+
+/* These are primitive requests from the ULP.  */
+typedef enum {
+
+	SCTP_PRIMITIVE_INITIALIZE = 0,
+	SCTP_PRIMITIVE_ASSOCIATE,
+	SCTP_PRIMITIVE_SHUTDOWN,
+	SCTP_PRIMITIVE_ABORT,
+	SCTP_PRIMITIVE_SEND,
+	SCTP_PRIMITIVE_SETPRIMARY,
+	SCTP_PRIMITIVE_RECEIVE,
+	SCTP_PRIMITIVE_STATUS,
+	SCTP_PRIMITIVE_CHANGEHEARTBEAT,
+	SCTP_PRIMITIVE_REQUESTHEARTBEAT,
+	SCTP_PRIMITIVE_GETSRTTREPORT,
+	SCTP_PRIMITIVE_SETFAILURETHRESHOLD,
+	SCTP_PRIMITIVE_SETPROTOPARAMETERS,
+	SCTP_PRIMITIVE_RECEIVE_UNSENT,
+	SCTP_PRIMITIVE_RECEIVE_UNACKED,
+	SCTP_PRIMITIVE_DESTROY,
+
+} sctp_event_primitive_t;
+
+#define SCTP_EVENT_PRIMITIVE_MAX	SCTP_PRIMITIVE_DESTROY
+#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)))
+
+/* This is a table of printable names of sctp_param_t's.  */
+extern const char *sctp_param_tbl[];
+
+
+#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_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
+ *   (at this point of time, may change later after more discussions: FIXME)
+ * A socket in SCTP_SS_UNCONNECTED 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.
+ */
+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[];
+
+/* SCTP reachability state for each address */
+#define SCTP_ADDR_NOHB			4
+#define SCTP_ADDR_REACHABLE		2
+#define SCTP_ADDR_NOT_REACHABLE		1
+
+
+
+
+/* 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.
+ */
+#define SCTP_MAX_DUP_TSNS 128
+
+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 */
+
+/* How long do we wait before attempting to raise the PMTU?  */
+#define SCTP_DEFAULT_TIMEOUT_PMTU_RAISE (10 * 60 * HZ) /* 10 Minutes */
+#define SCTP_DEFAULT_TIMEOUT_PMTU_RAISE_MIN (10 * 60 * HZ) /* 10 Minutes */
+
+/* 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	32768	/* 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 64 /* Pad out our cookie to make our hash
+				 * functions simpler to write.
+				 */
+
+/* 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_MUST_FRAG,
+} 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 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_sla1.h b/include/net/sctp/sctp_sla1.h
new file mode 100644
index 000000000000..9e88f6748334
--- /dev/null
+++ b/include/net/sctp/sctp_sla1.h
@@ -0,0 +1,80 @@
+/* SCTP reference Implementation 
+ * Copyright (C) 1999 Cisco, Inc. 
+ * Copyright (C) 1999 Motorola, Inc.
+ *
+ * This file originates from Randy Stewart's SCTP reference Implementation.
+ * 
+ * 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: 
+ *    Randy Stewart <rstewar1@email.mot.com>
+ *    Ken Morneau   <kmorneau@cisco.com> 
+ *    Qiaobing Xie  <qxie1@email.mot.com>
+ */
+
+#ifndef __SLA1_h__
+#define __SLA1_h__
+
+struct SLA_1_Context {
+	unsigned int A;
+	unsigned int B;
+	unsigned int C;
+	unsigned int D;
+	unsigned int E;
+	unsigned int H0;
+	unsigned int H1;
+	unsigned int H2;
+	unsigned int H3;
+	unsigned int H4;
+	unsigned int words[80];
+	unsigned int TEMP;
+
+	/* block I am collecting to process */
+	char SLAblock[64];
+
+	/* collected so far */
+	int howManyInBlock;
+	unsigned int runningTotal;
+};
+
+
+#define F1(B,C,D) (((B & C) | ((~B) & D)))       /* 0  <= t <= 19 */
+#define F2(B,C,D) (B ^ C ^ D)                   /* 20 <= t <= 39 */
+#define F3(B,C,D) ((B & C) | (B & D) | (C & D)) /* 40 <= t <= 59 */
+#define F4(B,C,D) (B ^ C ^ D)                   /*600 <= t <= 79 */
+/* circular shift */
+
+#define CSHIFT(A,B) ((B << A) | (B >> (32-A)))
+
+#define K1 0x5a827999       /* 0  <= t <= 19 */
+#define K2 0x6ed9eba1       /* 20 <= t <= 39 */
+#define K3 0x8f1bbcdc       /* 40 <= t <= 59 */
+#define K4 0xca62c1d6       /* 60 <= t <= 79 */
+
+#define H0INIT 0x67452301
+#define H1INIT 0xefcdab89
+#define H2INIT 0x98badcfe
+#define H3INIT 0x10325476
+#define H4INIT 0xc3d2e1f0
+
+extern void SLA1_Init(struct SLA_1_Context *);
+extern void SLA1_Process(struct SLA_1_Context *, const unsigned char *, int);
+extern void SLA1_Final(struct SLA_1_Context *, unsigned char *);
+
+#endif
diff --git a/include/net/sctp/sctp_sm.h b/include/net/sctp/sctp_sm.h
new file mode 100644
index 000000000000..2d1ac5826c89
--- /dev/null
+++ b/include/net/sctp/sctp_sm.h
@@ -0,0 +1,420 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001-2002 International Business Machines Corp.
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * This file is part of the implementation of the add-IP extension,
+ * based on <draft-ietf-tsvwg-addip-sctp-02.txt> June 29, 2001,
+ * for the SCTP kernel reference Implementation.
+ * 
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_sm.h,v 1.34 2002/08/21 18:34:04 jgrimm Exp $
+ * 
+ * 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>
+ *
+ * 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/sched.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <net/sctp/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 sctp_endpoint_t *,
+					      const sctp_association_t *,
+					      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;
+	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_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_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_shut_8_4_5;
+sctp_state_fn_t sctp_sf_pdiscard;
+sctp_state_fn_t sctp_sf_violation;
+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;
+
+/* 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_error_closed;
+sctp_state_fn_t sctp_sf_error_shutdown;
+sctp_state_fn_t sctp_sf_ignore_primitive;
+
+/* 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;
+
+/* 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;
+
+
+/* These are state functions which are either obsolete or not in use yet.
+ * If any of these functions needs to be revived, it should be renamed with
+ * the "sctp_sf_xxx" prefix, and be moved to the above prototype groups.
+ */
+
+/* Prototypes for chunk state functions.  Not in use. */
+sctp_state_fn_t sctp_sf_do_5_2_6_stale;
+sctp_state_fn_t sctp_sf_do_9_2_reshutack;
+sctp_state_fn_t sctp_sf_do_9_2_reshut;
+sctp_state_fn_t sctp_sf_do_9_2_shutack;
+
+sctp_state_fn_t lucky;
+sctp_state_fn_t other_stupid;
+
+/* Prototypes for timeout event state functions.  Not in use. */
+sctp_state_fn_t sctp_do_4_2_reinit;
+sctp_state_fn_t sctp_do_4_3_reecho;
+sctp_state_fn_t sctp_do_9_2_reshut;
+sctp_state_fn_t sctp_do_9_2_reshutack;
+sctp_state_fn_t sctp_do_8_3_hb_err;
+sctp_state_fn_t sctp_heartoff;
+
+/* Prototypes for addip related state functions.  Not in use. */
+sctp_state_fn_t sctp_addip_do_asconf;
+sctp_state_fn_t sctp_addip_do_asconf_ack;
+
+/* Prototypes for utility support functions.  */
+__u8 sctp_get_chunk_type(sctp_chunk_t *chunk);
+sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t event_type,
+					    sctp_state_t state,
+					    sctp_subtype_t event_subtype);
+
+time_t timeval_sub(struct timeval *, struct timeval *);
+sctp_association_t *sctp_make_temp_asoc(const sctp_endpoint_t *,
+					sctp_chunk_t *,
+					const int priority);
+__u32 sctp_generate_verification_tag(void);
+sctpParam_t sctp_get_my_addrs_raw(const sctp_association_t *,
+				  const int priority, int *addrs_len);
+
+void sctp_populate_tie_tags(__u8 *cookie, __u32 curTag, __u32 hisTag);
+
+/* Prototypes for chunk-building functions.  */
+sctp_chunk_t *sctp_make_init(const sctp_association_t *,
+			     const sctp_bind_addr_t *,
+			     int priority);
+sctp_chunk_t *sctp_make_init_ack(const sctp_association_t *,
+				 const sctp_chunk_t *,
+				 const int priority);
+sctp_chunk_t *sctp_make_cookie_echo(const sctp_association_t *,
+				    const sctp_chunk_t *);
+sctp_chunk_t *sctp_make_cookie_ack(const sctp_association_t *,
+				   const sctp_chunk_t *);
+sctp_chunk_t *sctp_make_cwr(const sctp_association_t *,
+				 const __u32 lowest_tsn,
+				 const sctp_chunk_t *);
+sctp_chunk_t *sctp_make_datafrag(sctp_association_t *,
+				 const struct sctp_sndrcvinfo *sinfo,
+				 int len, const __u8 *data,
+				 __u8 flags, __u16 ssn);
+sctp_chunk_t * sctp_make_datafrag_empty(sctp_association_t *,
+					const struct sctp_sndrcvinfo *sinfo,
+					int len, const __u8 flags,
+					__u16 ssn);
+sctp_chunk_t *sctp_make_data(sctp_association_t *,
+			     const struct sctp_sndrcvinfo *sinfo,
+			     int len, const __u8 *data);
+sctp_chunk_t *sctp_make_data_empty(sctp_association_t *,
+				   const struct sctp_sndrcvinfo *, int len);
+sctp_chunk_t *sctp_make_ecne(const sctp_association_t *,
+				  const __u32);
+sctp_chunk_t *sctp_make_sack(const sctp_association_t *);
+sctp_chunk_t *sctp_make_shutdown(const sctp_association_t *asoc);
+sctp_chunk_t *sctp_make_shutdown_ack(const sctp_association_t *asoc,
+					  const sctp_chunk_t *);
+sctp_chunk_t *sctp_make_shutdown_complete(const sctp_association_t *,
+					  const sctp_chunk_t *);
+void sctp_init_cause(sctp_chunk_t *, __u16 cause, const void *, size_t);
+sctp_chunk_t *sctp_make_abort(const sctp_association_t *,
+			      const sctp_chunk_t *,
+			      const size_t hint);
+sctp_chunk_t *sctp_make_abort_no_data(const sctp_association_t *,
+				      const sctp_chunk_t *,
+				      __u32 tsn);
+sctp_chunk_t *sctp_make_heartbeat(const sctp_association_t *,
+				  const sctp_transport_t *,
+				  const void *payload,
+				  const size_t paylen);
+sctp_chunk_t *sctp_make_heartbeat_ack(const sctp_association_t *,
+				      const sctp_chunk_t *,
+				      const void *payload,
+				      const size_t paylen);
+sctp_chunk_t *sctp_make_op_error(const sctp_association_t *,
+				 const sctp_chunk_t *chunk,
+				 __u16 cause_code,
+				 const void *payload,
+				 size_t paylen);
+void sctp_chunk_assign_tsn(sctp_chunk_t *);
+
+
+/* Prototypes for statetable processing. */
+
+int sctp_do_sm(sctp_event_t event_type, sctp_subtype_t subtype,
+	       sctp_state_t state,
+               sctp_endpoint_t *,
+               sctp_association_t *asoc,
+               void *event_arg,
+               int priority);
+
+int sctp_side_effects(sctp_event_t event_type, sctp_subtype_t subtype,
+		      sctp_state_t state,
+                      sctp_endpoint_t *,
+                      sctp_association_t *asoc,
+                      void *event_arg,
+                      sctp_disposition_t status,
+		      sctp_cmd_seq_t *commands,
+                      int priority);
+
+/* 2nd level prototypes */
+int
+sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
+		     sctp_state_t state,
+		     sctp_endpoint_t *ep,
+		     sctp_association_t *asoc,
+		     void *event_arg,
+		     sctp_disposition_t status,
+		     sctp_cmd_seq_t *retval,
+		     int priority);
+
+
+int sctp_gen_sack(sctp_association_t *, int force, sctp_cmd_seq_t *);
+void sctp_do_TSNdup(sctp_association_t *, sctp_chunk_t *, long gap);
+
+void sctp_generate_t3_rtx_event(unsigned long peer);
+void sctp_generate_heartbeat_event(unsigned long peer);
+
+sctp_sackhdr_t *sctp_sm_pull_sack(sctp_chunk_t *);
+
+sctp_cookie_param_t *
+sctp_pack_cookie(const sctp_endpoint_t *, const sctp_association_t *,
+		 const sctp_chunk_t *, int *cookie_len,
+		 const __u8 *, int addrs_len);
+sctp_association_t *sctp_unpack_cookie(const sctp_endpoint_t *,
+				       const sctp_association_t *,
+				       sctp_chunk_t *, int priority, int *err);
+int sctp_addip_addr_config(sctp_association_t *, sctp_param_t,
+			   struct sockaddr_storage*, int);
+
+/* 3rd level prototypes */
+__u32 sctp_generate_tag(const sctp_endpoint_t *);
+__u32 sctp_generate_tsn(const sctp_endpoint_t *);
+
+/* 4th level prototypes */
+void sctp_param2sockaddr(sockaddr_storage_t *addr, const sctpParam_t param,
+			 __u16 port);
+int sctp_addr2sockaddr(const sctpParam_t, sockaddr_storage_t *);
+int sockaddr2sctp_addr(const sockaddr_storage_t *, sctpParam_t);
+
+/* Extern declarations for major data structures.  */
+sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t, sctp_state_t);
+extern sctp_sm_table_entry_t
+primitive_event_table[SCTP_NUM_PRIMITIVE_TYPES][SCTP_STATE_NUM_STATES];
+extern sctp_sm_table_entry_t
+other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_STATE_NUM_STATES];
+extern sctp_sm_table_entry_t
+timeout_event_table[SCTP_NUM_TIMEOUT_TYPES][SCTP_STATE_NUM_STATES];
+extern sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES];
+
+/* These are some handy utility macros... */
+
+
+/* Get the size of a DATA chunk payload. */
+static inline __u16 sctp_data_size(sctp_chunk_t *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));
+}
+
+/* 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();
+}
+
+#endif /* __sctp_sm_h__ */
diff --git a/include/net/sctp/sctp_structs.h b/include/net/sctp/sctp_structs.h
new file mode 100644
index 000000000000..bb7715795c81
--- /dev/null
+++ b/include/net/sctp/sctp_structs.h
@@ -0,0 +1,1543 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001 International Business Machines Corp.
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_structs.h,v 1.21 2002/08/16 19:30:49 jgrimm Exp $
+ * 
+ * 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> 
+ * 
+ * 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 <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/tqueue.h>	/* We need tq_struct.    */
+#include <linux/sctp.h>         /* We need sctp* header structs.  */
+
+/*
+ * This is (almost) a direct quote from RFC 2553.
+ */
+
+/*
+ * Desired design of maximum size and alignment
+ */
+#define _SS_MAXSIZE    128		/* Implementation specific max size */
+#define _SS_ALIGNSIZE  (sizeof (__s64))
+				/* Implementation specific desired alignment */
+/*
+ * Definitions used for sockaddr_storage structure paddings design.
+ */
+#define _SS_PAD1SIZE   (_SS_ALIGNSIZE - sizeof (sa_family_t))
+#define _SS_PAD2SIZE   (_SS_MAXSIZE - (sizeof (sa_family_t)+ \
+                              _SS_PAD1SIZE + _SS_ALIGNSIZE))
+
+struct sockaddr_storage {
+	sa_family_t  __ss_family;		/* address family */
+	/* Following fields are implementation specific */
+	char      __ss_pad1[_SS_PAD1SIZE];
+				/* 6 byte pad, to make implementation */
+				/* specific pad up to alignment field that */
+				/* follows explicit in the data structure */
+	__s64   __ss_align;	/* field to force desired structure */
+				/* storage alignment */
+	char      __ss_pad2[_SS_PAD2SIZE];
+				/* 112 byte pad to achieve desired size, */
+				/* _SS_MAXSIZE value minus size of ss_family */
+				/* __ss_pad1, __ss_align fields is 112 */
+};
+
+/* A convenience structure for handling sockaddr structures.
+ * We should wean ourselves off this.
+ */
+typedef union {
+	struct sockaddr_in v4;
+	struct sockaddr_in6 v6;
+	struct sockaddr sa;
+} sockaddr_storage_t;
+
+
+/* Forward declarations for data structures. */
+struct SCTP_protocol;
+struct SCTP_endpoint;
+struct SCTP_association;
+struct SCTP_transport;
+struct SCTP_packet;
+struct SCTP_chunk;
+struct SCTP_inqueue;
+struct SCTP_outqueue;
+struct SCTP_bind_addr;
+struct sctp_opt;
+struct sctp_endpoint_common;
+
+
+typedef struct SCTP_protocol sctp_protocol_t;
+typedef struct SCTP_endpoint sctp_endpoint_t;
+typedef struct SCTP_association sctp_association_t;
+typedef struct SCTP_transport sctp_transport_t;
+typedef struct SCTP_packet sctp_packet_t;
+typedef struct SCTP_chunk sctp_chunk_t;
+typedef struct SCTP_inqueue sctp_inqueue_t;
+typedef struct SCTP_outqueue sctp_outqueue_t;
+typedef struct SCTP_bind_addr sctp_bind_addr_t;
+typedef struct sctp_opt sctp_opt_t;
+typedef struct sctp_endpoint_common sctp_endpoint_common_t;
+
+#include <net/sctp/sctp_tsnmap.h>
+#include <net/sctp/sctp_ulpevent.h>
+#include <net/sctp/sctp_ulpqueue.h>
+
+
+/* Structures useful for managing bind/connect. */
+
+typedef struct sctp_bind_bucket {
+	unsigned short 	port;
+	unsigned short	fastreuse;
+	struct sctp_bind_bucket *next;
+	struct sctp_bind_bucket **pprev;
+	struct sock	        *sk;
+} sctp_bind_bucket_t;
+
+typedef struct sctp_bind_hashbucket {
+	spinlock_t	lock;
+	struct sctp_bind_bucket	*chain;
+} sctp_bind_hashbucket_t;
+
+/* Used for hashing all associations.  */
+typedef struct sctp_hashbucket {
+	rwlock_t	lock;
+	sctp_endpoint_common_t  *chain;
+} sctp_hashbucket_t __attribute__((__aligned__(8)));
+
+
+/* The SCTP protocol structure. */
+struct SCTP_protocol {
+	/* 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;
+
+	/* 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.
+	 */
+	list_t address_families;
+
+	/* This is the hash of all endpoints. */
+	int ep_hashsize;
+	sctp_hashbucket_t *ep_hashbucket;
+
+	/* This is the hash of all associations. */
+	int assoc_hashsize;
+	sctp_hashbucket_t *assoc_hashbucket;
+
+	/* This is the sctp port control hash.  */
+	int port_hashsize;
+	int port_rover;
+	spinlock_t port_alloc_lock;  /* Protects port_rover. */
+	sctp_bind_hashbucket_t *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 struct sockaddr_storage_list.
+	 */
+	list_t local_addr_list;
+	spinlock_t local_addr_lock;
+};
+
+
+/*
+ * Pointers to address related SCTP functions.
+ * (i.e. things that depend on the address family.)
+ */
+typedef struct sctp_func {
+	int		(*queue_xmit)	(struct sk_buff *skb);
+	int 		(*setsockopt)	(struct sock *sk,
+					 int level,
+					 int optname,
+					 char *optval,
+					 int optlen);
+	int 		(*getsockopt)	(struct sock *sk,
+					 int level,
+					 int optname,
+					 char *optval,
+					 int *optlen);
+	int		(*get_dst_mtu)	(const sockaddr_storage_t *address);
+	__u16		net_header_len;	
+	int		sockaddr_len;
+	sa_family_t	sa_family;
+	list_t          list;
+} sctp_func_t;
+
+sctp_func_t *sctp_get_af_specific(const sockaddr_storage_t *address);
+
+/* 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_opt {
+	/* What kind of a socket is this? */
+	sctp_socket_type_t type;
+
+	/* What is our base endpointer? */
+	sctp_endpoint_t *ep;
+
+	/* Various Socket Options.  */
+	__u16 default_stream;
+	__u32 default_ppid;
+	struct sctp_initmsg initmsg;
+	struct sctp_rtoinfo rtoinfo;
+	struct sctp_paddrparams paddrparam;
+	struct sctp_event_subscribe subscribe;
+	__u32 autoclose;
+	__u8 nodelay;
+	__u8 disable_fragments;
+};
+
+
+
+/* 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)
+ *
+ */
+
+typedef 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.  */
+	sockaddr_storage_t peer_addr;
+
+	/* 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;
+	sctp_init_chunk_t peer_init[0];
+} sctp_cookie_t;
+
+
+/* The format of our cookie that we send to our peer. */
+typedef struct sctp_signed_cookie {
+	__u8 signature[SCTP_SECRET_SIZE];
+	sctp_cookie_t c;
+} sctp_signed_cookie_t;
+
+
+/* This convenience type allows us to avoid casting when walking
+ * through a parameter list.
+ */
+typedef union {
+	__u8 *v;
+	sctp_paramhdr_t *p;
+
+	sctp_cookie_preserve_param_t *bht;
+	sctp_hostname_param_t *dns;
+	sctp_cookie_param_t *cookie;
+	sctp_supported_addrs_param_t *sat;
+	sctp_ipv4addr_param_t *v4;
+	sctp_ipv6addr_param_t *v6;
+} sctpParam_t;
+
+/* This is another convenience type to allocate memory for address
+ * params for the maximum size and pass such structures around
+ * internally.
+ */
+typedef union {
+	sctp_ipv4addr_param_t v4;
+	sctp_ipv6addr_param_t v6;
+} sctpIpAddress_t;
+
+/* 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 {
+	sctp_paramhdr_t param_hdr;
+	sockaddr_storage_t daddr;
+	unsigned long sent_at;
+} sctp_sender_hb_info_t __attribute__((packed));
+
+/* 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.
+	 */
+	sctp_chunk_t *next;
+	sctp_chunk_t *prev;
+	struct sk_buff_head *list;
+
+	/* 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.  */
+	sctpParam_t param_hdr;
+	union {
+		__u8 *v;
+		sctp_datahdr_t *data_hdr;
+		sctp_inithdr_t *init_hdr;
+		sctp_sackhdr_t *sack_hdr;
+		sctp_heartbeathdr_t *hb_hdr;
+		sctp_sender_hb_info_t *hbs_hdr;
+		sctp_shutdownhdr_t *shutdown_hdr;
+		sctp_signed_cookie_t *cookie_hdr;
+		sctp_ecnehdr_t *ecne_hdr;
+		sctp_cwrhdr_t *ecn_cwr_hdr;
+		sctp_errhdr_t *err_hdr;
+	} subh;
+
+	__u8 *chunk_end;
+
+	sctp_chunkhdr_t *chunk_hdr;
+
+	sctp_sctphdr_t  *sctp_hdr;
+
+	/* This needs to be recoverable for SCTP_SEND_FAILED events. */
+	struct sctp_sndrcvinfo sinfo;
+
+	/* Which association does this belong to?  */
+	sctp_association_t *asoc;
+
+	/* What endpoint received this chunk? */
+	sctp_endpoint_common_t *rcvr;
+
+	/* We fill this in if we are calculating RTT. */
+	unsigned long sent_at;
+
+	__u8 rtt_in_progress;  /* Is this chunk used for RTT calculation? */
+	__u8 num_times_sent;   /* How man times did we send this? */
+	__u8 has_tsn;          /* Does this chunk have a TSN 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. */
+
+	/* What is the origin IP address for this chunk?  */
+	sockaddr_storage_t source;
+
+	/* 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.
+	 */
+	sctp_transport_t *transport;
+};
+
+sctp_chunk_t *sctp_make_chunk(const sctp_association_t *, __u8 type,
+			      __u8 flags, int size);
+void sctp_free_chunk(sctp_chunk_t *);
+sctp_chunk_t *sctp_copy_chunk(sctp_chunk_t *, int flags);
+void  *sctp_addto_chunk(sctp_chunk_t *chunk, int len, const void *data);
+int sctp_user_addto_chunk(sctp_chunk_t *chunk, int len, struct iovec *data);
+sctp_chunk_t *sctp_chunkify(struct sk_buff *, const sctp_association_t *,
+			    struct sock *);
+void sctp_init_source(sctp_chunk_t *chunk);
+const sockaddr_storage_t *sctp_source(const sctp_chunk_t *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 sockaddr_storage_list {
+	list_t list;
+	sockaddr_storage_t a;
+};
+
+typedef sctp_chunk_t *(sctp_packet_phandler_t)(sctp_association_t *);
+
+/* 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 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.
+	 */
+	sctp_transport_t *transport;
+
+	/* Allow a callback for getting a high priority chunk
+	 * bundled early into the packet (This is used for ECNE).
+	 */
+	sctp_packet_phandler_t *get_prepend_chunk;
+
+	/* This packet should advertise ECN capability to the network
+	 * via the ECT bit.
+	 */
+	int ecn_capable;
+
+	/* This packet contains a COOKIE-ECHO chunk. */
+	int has_cookie_echo;
+
+	int malloced;
+};
+
+typedef int (sctp_outqueue_thandler_t)(sctp_outqueue_t *, void *);
+typedef int (sctp_outqueue_ehandler_t)(sctp_outqueue_t *);
+typedef sctp_packet_t *(sctp_outqueue_ohandler_init_t)
+	(sctp_packet_t *,
+         sctp_transport_t *,
+         __u16 sport,
+         __u16 dport);
+typedef sctp_packet_t *(sctp_outqueue_ohandler_config_t)
+        (sctp_packet_t *,
+	 __u32 vtag,
+	 int ecn_capable,
+	 sctp_packet_phandler_t *get_prepend_chunk);
+typedef sctp_xmit_t (sctp_outqueue_ohandler_t)(sctp_packet_t *,
+                                               sctp_chunk_t *);
+typedef int (sctp_outqueue_ohandler_force_t)(sctp_packet_t *);
+
+sctp_outqueue_ohandler_init_t    sctp_packet_init;
+sctp_outqueue_ohandler_config_t  sctp_packet_config;
+sctp_outqueue_ohandler_t         sctp_packet_append_chunk;
+sctp_outqueue_ohandler_t         sctp_packet_transmit_chunk;
+sctp_outqueue_ohandler_force_t   sctp_packet_transmit;
+void sctp_packet_free(sctp_packet_t *);
+
+
+/* This represents a remote transport address.
+ * For local transport addresses, we just use sockaddr_storage_t.
+ *
+ * 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. */
+	list_t transports;
+
+	/* Reference counting. */
+	atomic_t refcnt;
+	int      dead;
+
+	/* This is the peer's IP address and port. */
+	sockaddr_storage_t ipaddr;
+
+	/* These are the functions we call to handle LLP stuff.  */
+	sctp_func_t *af_specific;
+
+	/* Which association do we belong to?  */
+	sctp_association_t *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;
+
+	/* 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;
+
+	/* state       : The current state of this destination,
+	 *             :  i.e. DOWN, UP, ALLOW-HB, NO-HEARTBEAT, etc.
+	 */
+	struct {
+		int active;
+		int hb_allowed;
+	} state;
+
+	/* These are the error stats for this destination.  */
+
+	/* Error count : The current error count for this destination.  */
+	unsigned short error_count;
+
+	/* Error       : Current error threshold for this destination
+	 * Threshold   : i.e. what value marks the destination down if
+	 *             : errorCount reaches this value.
+	 */
+	unsigned short error_threshold;
+
+	/* 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;
+
+	/* We use this name for debugging output... */
+	char *debug_name;
+
+	/* 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.  */
+	sctp_packet_t packet;
+
+	/* This is the list of transports that have chunks to send.  */
+	struct list_head send_ready;
+
+	int malloced; /* Is this structure kfree()able? */
+};
+
+extern sctp_transport_t *sctp_transport_new(const sockaddr_storage_t *, int);
+extern sctp_transport_t *sctp_transport_init(sctp_transport_t *,
+					     const sockaddr_storage_t *, int);
+extern void sctp_transport_set_owner(sctp_transport_t *, sctp_association_t *);
+extern void sctp_transport_free(sctp_transport_t *);
+extern void sctp_transport_destroy(sctp_transport_t *);
+extern void sctp_transport_reset_timers(sctp_transport_t *);
+extern void sctp_transport_hold(sctp_transport_t *);
+extern void sctp_transport_put(sctp_transport_t *);
+extern void sctp_transport_update_rto(sctp_transport_t *, __u32);
+extern void sctp_transport_raise_cwnd(sctp_transport_t *, __u32, __u32);
+extern void sctp_transport_lower_cwnd(sctp_transport_t *, sctp_lower_cwnd_t);
+
+/* This is the structure we use to queue packets as they come into
+ * SCTP.  We write packets to it and read chunks from it.  It handles
+ * fragment reassembly and chunk unbundling.
+ */
+struct SCTP_inqueue {
+	/* This is actually a queue of sctp_chunk_t 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.
+	 */
+	sctp_chunk_t *in_progress;
+
+	/* This is the delayed task to finish delivering inbound
+	 * messages.
+	 */
+	struct tq_struct immediate;
+
+	int malloced;        /* Is this structure kfree()able?  */
+};
+
+sctp_inqueue_t *sctp_inqueue_new(void);
+void sctp_inqueue_init(sctp_inqueue_t *);
+void sctp_inqueue_free(sctp_inqueue_t *);
+void sctp_push_inqueue(sctp_inqueue_t *, sctp_chunk_t *packet);
+sctp_chunk_t *sctp_pop_inqueue(sctp_inqueue_t *);
+void sctp_inqueue_set_th_handler(sctp_inqueue_t *,
+                                 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_outqueue {
+	sctp_association_t *asoc;
+
+	/* BUG: This really should be an array of streams.
+	 * This really holds a list of chunks (one stream).
+	 * FIXME: If true, why so?
+	 */
+	struct sk_buff_head out;
+
+	/* 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;
+
+	/* Call these functions to send chunks down to the next lower
+	 * layer.  This is always SCTP_packet, but we separate the two
+	 * structures to make testing simpler.
+	 */
+	sctp_outqueue_ohandler_init_t	*init_output;
+	sctp_outqueue_ohandler_config_t	*config_output;
+	sctp_outqueue_ohandler_t	*append_output;
+	sctp_outqueue_ohandler_t	*build_output;
+	sctp_outqueue_ohandler_force_t	*force_output;
+
+	/* How many unackd bytes do we have in-flight?  */
+	__u32 outstanding_bytes;
+
+	/* Is this structure empty?  */
+	int empty;
+
+	/* Are we kfree()able? */
+	int malloced;
+};
+
+sctp_outqueue_t *sctp_outqueue_new(sctp_association_t *);
+void sctp_outqueue_init(sctp_association_t *, sctp_outqueue_t *);
+void sctp_outqueue_teardown(sctp_outqueue_t *);
+void sctp_outqueue_free(sctp_outqueue_t*);
+void sctp_force_outqueue(sctp_outqueue_t *);
+int sctp_push_outqueue(sctp_outqueue_t *, sctp_chunk_t *chunk);
+int sctp_flush_outqueue(sctp_outqueue_t *, int);
+int sctp_sack_outqueue(sctp_outqueue_t *, sctp_sackhdr_t *);
+int sctp_outqueue_is_empty(const sctp_outqueue_t *);
+int sctp_outqueue_set_output_handlers(sctp_outqueue_t *,
+                                      sctp_outqueue_ohandler_init_t init,
+                                      sctp_outqueue_ohandler_config_t config,
+                                      sctp_outqueue_ohandler_t append,
+                                      sctp_outqueue_ohandler_t build,
+                                      sctp_outqueue_ohandler_force_t force);
+void sctp_outqueue_restart(sctp_outqueue_t *);
+void sctp_retransmit(sctp_outqueue_t *, sctp_transport_t *, __u8);
+
+
+/* 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.
+	 */
+	list_t address_list;
+
+	int malloced;        /* Are we kfree()able?  */
+};
+
+sctp_bind_addr_t *sctp_bind_addr_new(int gfp_mask);
+void sctp_bind_addr_init(sctp_bind_addr_t *, __u16 port);
+void sctp_bind_addr_free(sctp_bind_addr_t *);
+int sctp_bind_addr_copy(sctp_bind_addr_t *dest, const sctp_bind_addr_t *src,
+			sctp_scope_t scope, int priority,int flags);
+int sctp_add_bind_addr(sctp_bind_addr_t *, sockaddr_storage_t *,
+		       int priority);
+int sctp_del_bind_addr(sctp_bind_addr_t *, sockaddr_storage_t *);
+int sctp_bind_addr_has_addr(sctp_bind_addr_t *, const sockaddr_storage_t *);
+sctpParam_t sctp_bind_addrs_to_raw(const sctp_bind_addr_t *bp,
+				   int *addrs_len,
+				   int priority);
+int sctp_raw_to_bind_addrs(sctp_bind_addr_t *bp,
+			   __u8 *raw_addr_list,
+			   int addrs_len,
+			   unsigned short port,
+			   int priority);
+
+sctp_scope_t sctp_scope(const sockaddr_storage_t *);
+int sctp_in_scope(const sockaddr_storage_t *addr, const sctp_scope_t scope);
+int sctp_is_any(const sockaddr_storage_t *addr);
+int sctp_addr_is_valid(const sockaddr_storage_t *addr);
+
+
+/* What type of sctp_endpoint_common?  */
+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_endpoint_common {
+	/* Fields to help us manage our entries in the hash tables. */
+	sctp_endpoint_common_t *next;
+	sctp_endpoint_common_t **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.  */
+	sctp_inqueue_t   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.
+	 */
+	sctp_bind_addr_t 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. */
+	sctp_endpoint_common_t base;
+
+	/* These are the system-wide defaults and other stuff which is
+	 * endpoint-independent.
+	 */
+	sctp_protocol_t *proto;
+
+	/* 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 sctp_association_t entries. */
+	list_t 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 sctp_endpoint_t *sctp_ep(sctp_endpoint_common_t *base)
+{
+	sctp_endpoint_t *ep;
+
+	/* We are not really a list, but the list_entry() macro is
+	 * really quite generic to find the address of an outter struct.
+	 */
+	ep = list_entry(base, sctp_endpoint_t, base);
+	return ep;
+}
+
+/* These are function signatures for manipulating endpoints.  */
+sctp_endpoint_t *sctp_endpoint_new(sctp_protocol_t *, struct sock *, int);
+sctp_endpoint_t *sctp_endpoint_init(sctp_endpoint_t *, sctp_protocol_t *,
+				    struct sock *, int priority);
+void sctp_endpoint_free(sctp_endpoint_t *);
+void sctp_endpoint_put(sctp_endpoint_t *);
+void sctp_endpoint_hold(sctp_endpoint_t *);
+void sctp_endpoint_add_asoc(sctp_endpoint_t *, sctp_association_t *asoc);
+sctp_association_t *sctp_endpoint_lookup_assoc(const sctp_endpoint_t *ep,
+					       const sockaddr_storage_t *paddr,
+					       sctp_transport_t **);
+sctp_endpoint_t *sctp_endpoint_is_match(sctp_endpoint_t *,
+					const sockaddr_storage_t *);
+
+void sctp_process_init(sctp_association_t *asoc, sctp_cid_t cid,
+		       const sockaddr_storage_t *peer_addr,
+		       sctp_init_chunk_t  *peer_init, int priority);
+int sctp_process_param(sctp_association_t *asoc,
+		       sctpParam_t param,
+		       const sockaddr_storage_t *peer_addr,
+		       sctp_cid_t cid, int priority);
+__u32 sctp_generate_tag(const sctp_endpoint_t *ep);
+__u32 sctp_generate_tsn(const sctp_endpoint_t *ep);
+
+
+/* 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.
+	 */
+	sctp_endpoint_common_t base;
+
+	/* Associations on the same socket. */
+	list_t asocs;
+
+	/* This is a signature that lets us know that this is a
+	 * sctp_association_t data structure.  Used for mapping an
+	 * association id to an association.
+	 */
+	__u32 eyecatcher;
+
+	/* This is our parent endpoint.  */
+	sctp_endpoint_t *ep;
+
+	/* These are those association elements needed in the cookie.  */
+	sctp_cookie_t 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.
+		 */
+		list_t 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.
+		 */
+		sctp_transport_t *primary_path;
+
+		/* active_path
+		 *   The path that we are currently using to
+		 *   transmit new data and most control chunks.
+		 */
+		sctp_transport_t *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.
+		 */
+		sctp_transport_t *retran_path;
+
+		/* Pointer to last transport I have sent on.  */
+		sctp_transport_t *last_sent_to;
+
+		/* This is the last transport I have recieved DATA on.  */
+		sctp_transport_t *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().
+		 */
+		sctp_tsnmap_t tsn_map;
+		__u8 _map[sctp_tsnmap_storage_size(SCTP_TSN_MAP_SIZE)];
+
+		/* We record duplicate TSNs here.  We clear this after
+		 * every SACK.
+		 * FIXME: We should move this into the tsnmap? --jgrimm
+		 */
+		sctp_dup_tsn_t dup_tsns[SCTP_MAX_DUP_TSNS];
+		int next_dup_tsn;
+
+		/* Do we need to sack the peer? */
+		int sack_needed;
+
+		/* 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? */
+		sctp_inithdr_t i;
+		int cookie_len;
+		void *cookie;
+
+		/* ADDIP Extention (ADDIP)		--xguo */
+		/* <expected peer-serial-number> minus 1 (ADDIP sec. 4.2 C1) */
+		__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;
+
+	/* When did we enter this state?  */
+	int state_timestamp;
+
+	/* The cookie life I award for any cookie.  */
+	struct timeval cookie_life;
+	__u32 cookie_preserve;
+
+	/* Overall     : The overall association error count.
+	 * Error Count : [Clear this any time I get something.]
+	 */
+	int overall_error_count;
+
+	/* Overall     : The threshold for this association that if
+	 * Error       : the Overall Error Count reaches will cause
+	 * Threshold   : this association to be torn down. 
+	 */
+	int overall_error_threshold;
+
+	/* 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.  */
+	sctp_transport_t *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;
+
+	/* 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;
+
+	/* 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;
+
+	/* 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).
+	 */
+	/* Do we need to send an ack?
+	 * When counters[SctpCounterAckState] is above 1 we do!
+	 */
+	int counters[SCTP_NUMBER_COUNTERS];
+
+	struct {
+		__u16 stream;
+		__u32 ppid;
+	} defaults;
+
+	/* This tracks outbound ssn for a given stream.  */
+	__u16 ssn[SCTP_MAX_STREAM];
+
+	/* All outbound chunks go through this structure.  */
+	sctp_outqueue_t outqueue;
+
+	/* A smart pipe that will handle reordering and fragmentation,
+	 * as well as handle passing events up to the ULP.
+	 * In the future, we should make this at least dynamic, if
+	 * not also some sparse structure.
+	 */
+	sctp_ulpqueue_t ulpq;
+	__u8 _ssnmap[sctp_ulpqueue_storage_size(SCTP_MAX_STREAM)];
+
+	/* Need to send an ECNE Chunk? */
+	int need_ecne;
+
+	/* 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;
+
+	/* Name for debugging output... */
+	char *debug_name;
+
+	/* 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.
+	 */
+
+	/* Is the ADDIP extension enabled for this association? */
+	int addip_enable;
+
+	/* 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.]
+	 */
+	sctp_chunk_t *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.]
+	 */
+	sctp_chunk_t *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_outqueue.  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. All serial numbers are defined to be initialized at
+	 * the start of the association to the same value as the
+	 * Initial TSN.
+	 *
+	 * [and]
+	 *
+	 * 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;
+};
+
+
+/* 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 sctp_association_t *sctp_assoc(sctp_endpoint_common_t *base)
+{
+	sctp_association_t *asoc;
+
+	/* We are not really a list, but the list_entry() macro is
+	 * really quite generic find the address of an outter struct.
+	 */
+	asoc = list_entry(base, sctp_association_t, base);
+	return asoc;
+}
+
+/* These are function signatures for manipulating associations.  */
+
+
+sctp_association_t *
+sctp_association_new(const sctp_endpoint_t *, const struct sock *,
+		     sctp_scope_t scope, int priority);
+sctp_association_t *
+sctp_association_init(sctp_association_t *, const sctp_endpoint_t *,
+		      const struct sock *, sctp_scope_t scope,
+		      int priority);
+void sctp_association_free(sctp_association_t *);
+void sctp_association_put(sctp_association_t *);
+void sctp_association_hold(sctp_association_t *);
+
+sctp_transport_t *sctp_assoc_choose_shutdown_transport(sctp_association_t *);
+sctp_transport_t *sctp_assoc_lookup_paddr(const sctp_association_t *,
+					  const sockaddr_storage_t *);
+sctp_transport_t *sctp_assoc_add_peer(sctp_association_t *,
+				     const sockaddr_storage_t *address,
+				     const int priority);
+void sctp_assoc_control_transport(sctp_association_t *, sctp_transport_t *,
+				  sctp_transport_cmd_t, sctp_sn_error_t);
+sctp_transport_t *sctp_assoc_lookup_tsn(sctp_association_t *, __u32);
+sctp_transport_t *sctp_assoc_is_match(sctp_association_t *,
+				      const sockaddr_storage_t *,
+				      const sockaddr_storage_t *);
+void sctp_assoc_migrate(sctp_association_t *, struct sock *);
+void sctp_assoc_update(sctp_association_t *dst, sctp_association_t *src);
+
+__u32 __sctp_association_get_next_tsn(sctp_association_t *);
+__u32 __sctp_association_get_tsn_block(sctp_association_t *, int);
+__u16 __sctp_association_get_next_ssn(sctp_association_t *, __u16 sid);
+
+int sctp_cmp_addr(const sockaddr_storage_t *ss1,
+		  const sockaddr_storage_t *ss2);
+int sctp_cmp_addr_exact(const sockaddr_storage_t *ss1,
+		        const sockaddr_storage_t *ss2);
+sctp_chunk_t *sctp_get_ecne_prepend(sctp_association_t *asoc);
+sctp_chunk_t *sctp_get_no_prepend(sctp_association_t *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/sctp_tsnmap.h b/include/net/sctp/sctp_tsnmap.h
new file mode 100644
index 000000000000..2d75c3fc4d61
--- /dev/null
+++ b/include/net/sctp/sctp_tsnmap.h
@@ -0,0 +1,161 @@
+/* SCTP kernel reference Implementation Copyright (C) 1999-2001
+ * Cisco, Motorola, Intel, and International Business Machines Corp.
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_tsnmap.h,v 1.8 2002/07/16 14:51:58 jgrimm Exp $
+ * 
+ * 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 one of the
+ * following email addresses:
+ * 
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * 
+ * 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/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.
+ */
+typedef 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;
+
+	/* No. of data chunks pending receipt. used by SCTP_STATUS sockopt */
+	__u16 pending_data;
+
+	int malloced;
+
+	__u8 raw_map[0];
+} sctp_tsnmap_t;
+
+typedef struct sctp_tsnmap_iter {
+	__u32 start;
+} sctp_tsnmap_iter_t;
+
+
+/* Create a new tsnmap.  */
+sctp_tsnmap_t *sctp_tsnmap_new(__u16 len, __u32 initial_tsn,
+			       int priority);
+
+/* Dispose of a tsnmap.  */
+void sctp_tsnmap_free(sctp_tsnmap_t *map);
+
+/* 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.  */
+sctp_tsnmap_t *sctp_tsnmap_init(sctp_tsnmap_t *map, __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 sctp_tsnmap_t *map, __u32 tsn);
+
+/* Mark this TSN as seen.  */
+void sctp_tsnmap_mark(sctp_tsnmap_t *map, __u32 tsn);
+
+/* Retrieve the Cumulative TSN ACK Point.  */
+__u32 sctp_tsnmap_get_ctsn(const sctp_tsnmap_t *map);
+
+/* Retrieve the highest TSN we've seen.  */
+__u32 sctp_tsnmap_get_max_tsn_seen(const sctp_tsnmap_t *map);
+
+/* Is there a gap in the TSN map? */
+int sctp_tsnmap_has_gap(const sctp_tsnmap_t *map);
+
+/* Initialize a gap ack block interator from user-provided memory.  */
+void sctp_tsnmap_iter_init(const sctp_tsnmap_t *map, sctp_tsnmap_iter_t *iter);
+
+/* Get the next gap ack blocks.  We return 0 if there are no more
+ * gap ack blocks.
+ */
+int sctp_tsnmap_next_gap_ack(const sctp_tsnmap_t *map, sctp_tsnmap_iter_t *iter,
+			     __u16 *start, __u16 *end);
+
+
+#endif /* __sctp_tsnmap_h__ */
+
+
+
diff --git a/include/net/sctp/sctp_ulpevent.h b/include/net/sctp/sctp_ulpevent.h
new file mode 100644
index 000000000000..75e8ba9efc05
--- /dev/null
+++ b/include/net/sctp/sctp_ulpevent.h
@@ -0,0 +1,137 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 International Business Machines, Corp.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001 Nokia, Inc.
+ * Copyright (c) 2001 La Monte H.P. Yarroll
+ *
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_ulpevent.h,v 1.5 2002/07/12 14:50:25 jgrimm Exp $
+ * 
+ * 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. 
+ * 
+ * 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:
+ * 
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Karl Knutson <karl@athena.chicago.il.us>
+ * 
+ * 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.
+ */
+typedef struct sctp_ulpevent {
+	int malloced;
+	sctp_association_t *asoc;
+	struct sk_buff *parent;
+	struct sctp_sndrcvinfo sndrcvinfo;
+	int chunk_flags; /* Temp. until we get a new chunk_t */
+	int msg_flags;
+} sctp_ulpevent_t;
+
+
+sctp_ulpevent_t *sctp_ulpevent_new(int size, int msg_flags, int priority);
+
+sctp_ulpevent_t *sctp_ulpevent_init(sctp_ulpevent_t *event, struct sk_buff *skb, int msg_flags);
+
+void sctp_ulpevent_free(sctp_ulpevent_t *event);
+
+int sctp_ulpevent_is_notification(const sctp_ulpevent_t *event);
+
+sctp_ulpevent_t *sctp_ulpevent_make_assoc_change(
+				const struct SCTP_association *asoc,
+				__u16 flags,
+				__u16 state,
+				__u16 error,
+				__u16 outbound,
+				__u16 inbound,
+				int priority);
+
+sctp_ulpevent_t *sctp_ulpevent_make_peer_addr_change(
+				const struct SCTP_association *asoc,
+				const struct sockaddr_storage *aaddr,
+				int flags,
+				int state,
+				int error,
+				int priority);
+
+sctp_ulpevent_t *sctp_ulpevent_make_remote_error(
+				const struct SCTP_association *asoc,
+				struct SCTP_chunk *chunk,
+				__u16 flags,
+				int priority);
+sctp_ulpevent_t *sctp_ulpevent_make_send_failed(
+				const struct SCTP_association *asoc,
+				struct SCTP_chunk *chunk,
+				__u16 flags,
+				__u32 error,
+				int priority);
+
+sctp_ulpevent_t *sctp_ulpevent_make_shutdown_event(
+				const struct SCTP_association *asoc,
+				__u16 flags,
+				int priority);
+
+sctp_ulpevent_t *sctp_ulpevent_make_rcvmsg(struct SCTP_association *asoc,
+					   struct SCTP_chunk *chunk,
+					   int priority);
+
+void sctp_ulpevent_read_sndrcvinfo(const sctp_ulpevent_t *event,
+				   struct msghdr *msghdr);
+
+__u16 sctp_ulpevent_get_notification_type(const sctp_ulpevent_t *event);
+
+
+
+/* Given an event subscription, is this event enabled? */
+static inline int sctp_ulpevent_is_enabled(const sctp_ulpevent_t *event,
+					   const struct sctp_event_subscribe *mask)
+{
+	const char *amask = (const char *) mask;
+	__u16 sn_type;
+	int enabled = 1;
+
+	if (sctp_ulpevent_is_notification(event)) {
+		sn_type = sctp_ulpevent_get_notification_type(event);
+		enabled = amask[sn_type - SCTP_SN_TYPE_BASE];
+	}
+	return enabled;
+}
+
+
+#endif /* __sctp_ulpevent_h__ */
+
+
+
+
+
+
+
diff --git a/include/net/sctp/sctp_ulpqueue.h b/include/net/sctp/sctp_ulpqueue.h
new file mode 100644
index 000000000000..83c1b9749659
--- /dev/null
+++ b/include/net/sctp/sctp_ulpqueue.h
@@ -0,0 +1,95 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 International Business Machines, Corp.
+ * Copyright (c) 2001 Intel Corp.
+ * Copyright (c) 2001 Nokia, Inc.
+ * Copyright (c) 2001 La Monte H.P. Yarroll
+ *
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_ulpqueue.h,v 1.2 2002/07/12 14:50:25 jgrimm Exp $
+ * 
+ * These are the definitions needed for the sctp_ulpqueue type.  The 
+ * sctp_ulpqueue 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 one of the
+ * following email addresses:
+ * 
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * 
+ * 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) */
+typedef struct sctp_ulpqueue {
+	int malloced;
+	spinlock_t lock;
+	sctp_association_t *asoc;
+	struct sk_buff_head reasm;
+	struct sk_buff_head lobby;
+	__u16 ssn[0];
+} sctp_ulpqueue_t;
+
+/* This macro assists in creation of external storage for variable length
+ * internal buffers.
+ */
+#define sctp_ulpqueue_storage_size(inbound) (sizeof(__u16) * (inbound))
+
+sctp_ulpqueue_t *sctp_ulpqueue_new(sctp_association_t *asoc,
+				   __u16 inbound,
+				   int priority);
+
+sctp_ulpqueue_t *sctp_ulpqueue_init(sctp_ulpqueue_t *ulpq,
+				    sctp_association_t *asoc,
+				    __u16 inbound);
+
+void sctp_ulpqueue_free(sctp_ulpqueue_t *);
+
+
+/* Add a new DATA chunk for processing. */
+int sctp_ulpqueue_tail_data(sctp_ulpqueue_t *,
+			    sctp_chunk_t *chunk,
+			    int priority);
+
+
+/* Add a new event for propogation to the ULP. */
+int sctp_ulpqueue_tail_event(sctp_ulpqueue_t *, 
+			     sctp_ulpevent_t *event);
+
+
+/* Is the ulpqueue empty. */
+int sctp_ulpqueue_is_empty(sctp_ulpqueue_t *);
+
+int sctp_ulpqueue_is_data_empty(sctp_ulpqueue_t *);
+
+#endif /* __sctp_ulpqueue_h__ */
+
+
+
+
+
+
+ 
diff --git a/include/net/sctp/sctp_user.h b/include/net/sctp/sctp_user.h
new file mode 100644
index 000000000000..54eaadd802e2
--- /dev/null
+++ b/include/net/sctp/sctp_user.h
@@ -0,0 +1,609 @@
+/* SCTP kernel reference Implementation
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001 International Business Machines, Corp.
+ * 
+ * This file is part of the SCTP kernel reference Implementation
+ * 
+ * $Header: /cvsroot/lksctp/lksctp/sctp_cvs/include/net/sctp/sctp_user.h,v 1.17 2002/07/29 21:04:23 jgrimm Exp $
+ * 
+ * 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>
+ * 
+ * 
+ * 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/socket.h>
+
+#ifndef __net_sctp_user_h__
+#define __net_sctp_user_h__
+
+
+typedef void * sctp_assoc_t;
+
+/* The following symbols come from the Sockets API Extensions for
+ * SCTP <draft-ietf-tsvwg-sctpsocket-04.txt>.
+ */
+enum sctp_optname {
+	SCTP_RTOINFO,
+#define SCTP_RTOINFO SCTP_RTOINFO
+	SCTP_ASSOCRTXINFO,
+#define SCTP_ASSOCRTXINFO SCTP_ASSOCRTXINFO
+	SCTP_INITMSG,
+#define SCTP_INITMSG SCTP_INITMSG
+	SCTP_AUTO_CLOSE,
+#define SCTP_AUTO_CLOSE SCTP_AUTO_CLOSE
+	SCTP_SET_PRIMARY_ADDR,
+#define SCTP_SET_PRIMARY_ADDR SCTP_SET_PRIMARY_ADDR
+	SCTP_SET_PEER_PRIMARY_ADDR, 
+#define SCTP_SET_PEER_PRIMARY_ADDR SCTP_SET_PEER_PRIMARY_ADDR
+	SCTP_SET_ADAPTATION_LAYER,      
+#define SCTP_SET_ADAPTATION_LAYER SCTP_SET_ADAPTATION_LAYER
+	SCTP_SET_STREAM_TIMEOUTS,
+#define SCTP_SET_STREAM_TIMEOUTS SCTP_SET_STREAM_TIMEOUTS
+	SCTP_DISABLE_FRAGMENTS,
+#define SCTP_DISABLE_FRAGMENTS SCTP_DISABLE_FRAGMENTS
+	SCTP_SET_PEER_ADDR_PARAMS,
+#define SCTP_SET_PEER_ADDR_PARAMS SCTP_SET_PEER_ADDR_PARAMS
+	SCTP_GET_PEER_ADDR_PARAMS,
+#define SCTP_GET_PEER_ADDR_PARAMS SCTP_GET_PEER_ADDR_PARAMS
+	SCTP_STATUS,
+#define SCTP_STATUS SCTP_STATUS
+	SCTP_GET_PEER_ADDR_INFO,
+#define SCTP_GET_PEER_ADDR_INFO SCTP_GET_PEER_ADDR_INFO
+	SCTP_SET_EVENTS,
+#define SCTP_SET_EVENTS SCTP_SET_EVENTS
+	SCTP_AUTOCLOSE,
+#define SCTP_AUTOCLOSE SCTP_AUTOCLOSE
+	SCTP_SET_DEFAULT_SEND_PARAM,
+#define SCTP_SET_DEFAULT_SEND_PARAM SCTP_SET_DEFAULT_SEND_PARAM
+
+	SCTP_SOCKOPT_DEBUG_NAME = 42, /* FIXME */
+#define SCTP_SOCKOPT_DEBUG_NAME	SCTP_SOCKOPT_DEBUG_NAME
+
+	SCTP_SOCKOPT_BINDX_ADD, /* 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
+};
+
+
+/*
+ * 5.2 SCTP msg_control Structures
+ *
+ * A key element of all SCTP-specific socket extensions is the use of
+ * ancillary data to specify and access SCTP-specific data via the
+ * struct msghdr's msg_control member used in sendmsg() and recvmsg().
+ * Fine-grained control over initialization and sending parameters are
+ * handled with ancillary data.
+ *
+ * Each ancillary data item is preceeded by a struct cmsghdr (see
+ * Section 5.1), which defines the function and purpose of the data
+ * contained in in the cmsg_data[] member.
+ */
+
+/*
+ * 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;
+	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/recieve 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 {
+	ADDRESS_AVAILABLE,
+	ADDRESS_UNREACHABLE,
+	ADDRESS_REMOVED,
+	ADDRESS_ADDED,
+	ADDRESS_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;
+	__u16 sre_len;
+	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_adaptation_bits;
+	sctp_assoc_t sse_assoc_id;
+};
+
+/*
+ * 5.3.1.7 SCTP_PARTIAL_DELIVERY_EVENT
+ *
+ *   When a reciever is engaged in a partial delivery of a
+ *   message this notification will be used to inidicate
+ *   various events.
+ */
+
+struct sctp_rcv_pdapi_event {
+	__u16 pdapi_type;
+	__u16 pdapi_flags;
+	__u32 pdapi_length;
+	__u32 pdapi_indication;
+	sctp_assoc_t pdapi_assoc_id;
+};
+
+
+/*
+ * 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;
+	} h;
+	struct sctp_assoc_change sn_assoc_change;
+	struct sctp_paddr_change sn_padr_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_rcv_pdapi_event sn_rcv_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_REMOTE_ERROR,
+	SCTP_SEND_FAILED,
+	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;
+
+/*
+ *
+ * 7.1.14 Peer Address Parameters
+ *
+ *   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 {
+	struct sockaddr_storage	spp_address;
+	__u32			spp_hbinterval;
+	__u16			spp_pathmaxrxt;
+	sctp_assoc_t		spp_assoc_id;
+};
+
+/*
+ * 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;
+};
+
+
+/*
+ * 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.  The peer address
+ *   parameter is ignored for TCP style socket.
+ */
+
+struct sctp_rtoinfo {
+	__u32		srto_initial;
+	__u32		srto_max;
+	__u32		srto_min;
+	sctp_assoc_t	srto_assoc_id;
+};
+
+/*
+ * 7.1.2 Association Retransmission Parameter (SCTP_ASSOCRTXINFO)
+ *
+ *   The protocol parameter used to set the number of retransmissions
+ *   sent before an association is considered unreachable.
+ *   See [SCTP] for more information on how this parameter is used.  The
+ *   peer address parameter is ignored for TCP style socket.
+ */
+
+struct sctp_assocparams {
+	__u16		sasoc_asocmaxrxt;
+	sctp_assoc_t	sasoc_assoc_id;
+};
+
+
+/*
+ * 7.1.9 Set Primary Address (SCTP_SET_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_setprim {
+	struct sockaddr_storage ssp_addr;
+	sctp_assoc_t            ssp_assoc_id;
+};
+
+/*
+ * 7.1.10 Set Peer Primary Address (SCTP_SET_PEER_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_setpeerprim {
+	struct sockaddr_storage sspp_addr;
+	sctp_assoc_t            sspp_assoc_id;
+};
+
+/*
+ * 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;
+};
+
+
+/*
+ * 7.1.12 Set Adaption Layer Indicator
+ *
+ * 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;
+};
+
+/*
+ * 7.1.12 Set default message time outs (SCTP_SET_STREAM_TIMEOUTS)
+ *
+ * This option requests that the requested stream apply a
+ *  default time-out for messages in queue.
+ */
+struct sctp_setstrm_timeout   {
+	sctp_assoc_t	ssto_assoc_id;
+	__u32		ssto_timeout;
+	__u16		ssto_streamid_start;
+	__u16		ssto_streamid_end;
+};
+
+
+/* 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 BINDX_ADD_ADDR 0x01
+#define 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__ */
+
+
+