user.h

linux-2.4.29操作系统的源码

/* SCTP kernel reference Implementation
 * (C) Copyright IBM Corp. 2001, 2004
 * Copyright (c) 1999-2000 Cisco, Inc.
 * Copyright (c) 1999-2001 Motorola, Inc.
 * Copyright (c) 2002 Intel Corp.
 *
 * This file is part of the SCTP kernel reference Implementation
 *
 * This header represents the structures and constants needed to support
 * the SCTP Extension to the Sockets API.
 *
 * The SCTP reference implementation is free software;
 * you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * The SCTP reference implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <[e-mail]>
 *
 * Or submit a bug report through the following website:
 *    http://www.sf.net/projects/lksctp
 *
 * Written or modified by:
 *    La Monte H.P. Yarroll    <[e-mail]>
 *    R. Stewart               <[e-mail]>
 *    K. Morneau               <[e-mail]>
 *    Q. Xie                   <[e-mail]>
 *    Karl Knutson             <[e-mail]>
 *    Jon Grimm                <[e-mail]>
 *    Daisy Chang              <[e-mail]>
 *    Ryan Layer               <[e-mail]>
 *    Ardelle Fan	       <[e-mail]>
 *    Sridhar Samudrala        <[e-mail]>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */

#ifndef __net_sctp_user_h__
#define __net_sctp_user_h__

#include <linux/types.h>
#include <linux/socket.h>

typedef void * sctp_assoc_t;

/* The following symbols come from the Sockets API Extensions for
 * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
 */
enum sctp_optname {
	SCTP_RTOINFO,
#define SCTP_RTOINFO SCTP_RTOINFO
	SCTP_ASSOCINFO,
#define SCTP_ASSOCINFO SCTP_ASSOCINFO
	SCTP_INITMSG,
#define SCTP_INITMSG SCTP_INITMSG
	SCTP_NODELAY, 	/* Get/set nodelay option. */
#define SCTP_NODELAY	SCTP_NODELAY
	SCTP_AUTOCLOSE,
#define SCTP_AUTOCLOSE SCTP_AUTOCLOSE
	SCTP_SET_PEER_PRIMARY_ADDR, 
#define SCTP_SET_PEER_PRIMARY_ADDR SCTP_SET_PEER_PRIMARY_ADDR
	SCTP_PRIMARY_ADDR,
#define SCTP_PRIMARY_ADDR SCTP_PRIMARY_ADDR
	SCTP_ADAPTION_LAYER,      
#define SCTP_ADAPTION_LAYER SCTP_ADAPTION_LAYER
	SCTP_DISABLE_FRAGMENTS,
#define SCTP_DISABLE_FRAGMENTS SCTP_DISABLE_FRAGMENTS
	SCTP_PEER_ADDR_PARAMS,
#define SCTP_PEER_ADDR_PARAMS SCTP_PEER_ADDR_PARAMS
	SCTP_DEFAULT_SEND_PARAM,
#define SCTP_DEFAULT_SEND_PARAM SCTP_DEFAULT_SEND_PARAM
	SCTP_EVENTS,
#define SCTP_EVENTS SCTP_EVENTS
	SCTP_I_WANT_MAPPED_V4_ADDR,  /* Turn on/off mapped v4 addresses  */
#define SCTP_I_WANT_MAPPED_V4_ADDR SCTP_I_WANT_MAPPED_V4_ADDR
	SCTP_MAXSEG, 	/* Get/set maximum fragment. */
#define SCTP_MAXSEG 	SCTP_MAXSEG
	SCTP_STATUS,
#define SCTP_STATUS SCTP_STATUS
	SCTP_GET_PEER_ADDR_INFO,
#define SCTP_GET_PEER_ADDR_INFO SCTP_GET_PEER_ADDR_INFO

	/* Internal Socket Options. Some of the sctp library functions are 
	 * implemented using these socket options.
	 */
	SCTP_SOCKOPT_BINDX_ADD = 100,/* BINDX requests for adding addresses. */
#define SCTP_SOCKOPT_BINDX_ADD	SCTP_SOCKOPT_BINDX_ADD
	SCTP_SOCKOPT_BINDX_REM, /* BINDX requests for removing addresses. */
#define SCTP_SOCKOPT_BINDX_REM	SCTP_SOCKOPT_BINDX_REM
	SCTP_SOCKOPT_PEELOFF, 	/* peel off association. */
#define SCTP_SOCKOPT_PEELOFF	SCTP_SOCKOPT_PEELOFF
	SCTP_GET_PEER_ADDRS_NUM, 	/* Get number of peer addresss. */
#define SCTP_GET_PEER_ADDRS_NUM	SCTP_GET_PEER_ADDRS_NUM
	SCTP_GET_PEER_ADDRS, 	/* Get all peer addresss. */
#define SCTP_GET_PEER_ADDRS	SCTP_GET_PEER_ADDRS
	SCTP_GET_LOCAL_ADDRS_NUM, 	/* Get number of local addresss. */
#define SCTP_GET_LOCAL_ADDRS_NUM	SCTP_GET_LOCAL_ADDRS_NUM
	SCTP_GET_LOCAL_ADDRS, 	/* Get all local addresss. */
#define SCTP_GET_LOCAL_ADDRS	SCTP_GET_LOCAL_ADDRS
};

/*
 * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
 *
 *   This cmsghdr structure provides information for initializing new
 *   SCTP associations with sendmsg().  The SCTP_INITMSG socket option
 *   uses this same data structure.  This structure is not used for
 *   recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   ----------------------
 *   IPPROTO_SCTP  SCTP_INIT      struct sctp_initmsg
 *
 */
struct sctp_initmsg {
	__u16 sinit_num_ostreams;
	__u16 sinit_max_instreams;
	__u16 sinit_max_attempts;
	__u16 sinit_max_init_timeo;
};

/*
 * 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
 *
 *   This cmsghdr structure specifies SCTP options for sendmsg() and
 *   describes SCTP header information about a received message through
 *   recvmsg().
 *
 *   cmsg_level    cmsg_type      cmsg_data[]
 *   ------------  ------------   ----------------------
 *   IPPROTO_SCTP  SCTP_SNDRCV    struct sctp_sndrcvinfo
 *
 */
struct sctp_sndrcvinfo {
	__u16 sinfo_stream;
	__u16 sinfo_ssn;
	__u16 sinfo_flags;
	__u32 sinfo_ppid;
	__u32 sinfo_context;
	__u32 sinfo_timetolive;
	__u32 sinfo_tsn;
	__u32 sinfo_cumtsn;
	sctp_assoc_t sinfo_assoc_id;
};

/*
 *  sinfo_flags: 16 bits (unsigned integer)
 *
 *   This field may contain any of the following flags and is composed of
 *   a bitwise OR of these values.
 */

enum sctp_sinfo_flags {
	MSG_UNORDERED = 1,  /* Send/receive message unordered. */
	MSG_ADDR_OVER = 2,  /* Override the primary destination. */
	MSG_ABORT=4,        /* Send an ABORT message to the peer. */
	/* MSG_EOF is already defined per socket.h */
};


typedef union {
	__u8   			raw;
	struct sctp_initmsg	init;
	struct sctp_sndrcvinfo	sndrcv;
} sctp_cmsg_data_t;

/* These are cmsg_types.  */
typedef enum sctp_cmsg_type {
	SCTP_INIT,              /* 5.2.1 SCTP Initiation Structure */
	SCTP_SNDRCV,            /* 5.2.2 SCTP Header Information Structure */
} sctp_cmsg_t;


/*
 * 5.3.1.1 SCTP_ASSOC_CHANGE
 *
 *   Communication notifications inform the ULP that an SCTP association
 *   has either begun or ended. The identifier for a new association is
 *   provided by this notificaion. The notification information has the
 *   following format:
 *
 */
struct sctp_assoc_change {
	__u16 sac_type;
	__u16 sac_flags;
	__u32 sac_length;
	__u16 sac_state;
	__u16 sac_error;
	__u16 sac_outbound_streams;
	__u16 sac_inbound_streams;
	sctp_assoc_t sac_assoc_id;
};

/*
 *   sac_state: 32 bits (signed integer)
 *
 *   This field holds one of a number of values that communicate the
 *   event that happened to the association.  They include:
 *
 *   Note:  The following state names deviate from the API draft as
 *   the names clash too easily with other kernel symbols.
 */
enum sctp_sac_state {
	SCTP_COMM_UP,
	SCTP_COMM_LOST,
	SCTP_RESTART,
	SCTP_SHUTDOWN_COMP,
	SCTP_CANT_STR_ASSOC,
};

/*
 * 5.3.1.2 SCTP_PEER_ADDR_CHANGE
 *
 *   When a destination address on a multi-homed peer encounters a change
 *   an interface details event is sent.  The information has the
 *   following structure:
 */
struct sctp_paddr_change {
	__u16 spc_type;
	__u16 spc_flags;
	__u32 spc_length;
	struct sockaddr_storage spc_aaddr;
	int spc_state;
	int spc_error;
	sctp_assoc_t spc_assoc_id;
};

/*
 *    spc_state:  32 bits (signed integer)
 *
 *   This field holds one of a number of values that communicate the
 *   event that happened to the address.  They include:
 */
enum sctp_spc_state {
	SCTP_ADDR_AVAILABLE,
	SCTP_ADDR_UNREACHABLE,
	SCTP_ADDR_REMOVED,
	SCTP_ADDR_ADDED,
	SCTP_ADDR_MADE_PRIM,
};


/*
 * 5.3.1.3 SCTP_REMOTE_ERROR
 *
 *   A remote peer may send an Operational Error message to its peer.
 *   This message indicates a variety of error conditions on an
 *   association. The entire error TLV as it appears on the wire is
 *   included in a SCTP_REMOTE_ERROR event.  Please refer to the SCTP
 *   specification [SCTP] and any extensions for a list of possible
 *   error formats. SCTP error TLVs have the format:
 */
struct sctp_remote_error {
	__u16 sre_type;
	__u16 sre_flags;
	__u32 sre_length;
	__u16 sre_error;
	sctp_assoc_t sre_assoc_id;
	__u8 sre_data[0];
};


/*
 * 5.3.1.4 SCTP_SEND_FAILED
 *
 *   If SCTP cannot deliver a message it may return the message as a
 *   notification.
 */
struct sctp_send_failed {
	__u16 ssf_type;
	__u16 ssf_flags;
	__u32 ssf_length;
	__u32 ssf_error;
	struct sctp_sndrcvinfo ssf_info;
	sctp_assoc_t ssf_assoc_id;
	__u8 ssf_data[0];
};

/*
 *   ssf_flags: 16 bits (unsigned integer)
 *