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//==========================================================================

//

//      include/sys/socket.h

//

//==========================================================================

// ####BSDCOPYRIGHTBEGIN####                                    

// -------------------------------------------                  

// This file is part of eCos, the Embedded Configurable Operating System.

//

// Portions of this software may have been derived from FreeBSD 

// or other sources, and if so are covered by the appropriate copyright

// and license included herein.                                 

//

// Portions created by the Free Software Foundation are         

// Copyright (C) 2002 Free Software Foundation, Inc.            

// -------------------------------------------                  

// ####BSDCOPYRIGHTEND####                                      

//==========================================================================

/*

 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994

 *      The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *      @(#)socket.h    8.4 (Berkeley) 2/21/94

 * $FreeBSD: src/sys/sys/socket.h,v 1.39.2.7 2001/07/03 11:02:01 ume Exp $

 */

#ifndef _SYS_SOCKET_H_

#define _SYS_SOCKET_H_

/*

 * Definitions related to sockets: types, address families, options.

 */

/*

 * Data types.

 */

#include <sys/types.h>

/*

 * Types

 */

#define SOCK_STREAM     1               /* stream socket */

#define SOCK_DGRAM      2               /* datagram socket */

#define SOCK_RAW        3               /* raw-protocol interface */

#define SOCK_RDM        4               /* reliably-delivered message */

#define SOCK_SEQPACKET  5               /* sequenced packet stream */

/*

 * Option flags per-socket.

 */

#define SO_DEBUG        0x0001          /* turn on debugging info recording */

#define SO_ACCEPTCONN   0x0002          /* socket has had listen() */

#define SO_REUSEADDR    0x0004          /* allow local address reuse */

#define SO_KEEPALIVE    0x0008          /* keep connections alive */

#define SO_DONTROUTE    0x0010          /* just use interface addresses */

#define SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */

#define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */

#define SO_LINGER       0x0080          /* linger on close if data present */

#define SO_OOBINLINE    0x0100          /* leave received OOB data in line */

#define SO_REUSEPORT    0x0200          /* allow local address & port reuse */

#define SO_TIMESTAMP    0x0400          /* timestamp received dgram traffic */

#define SO_ACCEPTFILTER 0x1000          /* there is an accept filter */

/*

 * Additional options, not kept in so_options.

 */

#define SO_SNDBUF       0x1001          /* send buffer size */

#define SO_RCVBUF       0x1002          /* receive buffer size */

#define SO_SNDLOWAT     0x1003          /* send low-water mark */

#define SO_RCVLOWAT     0x1004          /* receive low-water mark */

#define SO_SNDTIMEO     0x1005          /* send timeout */

#define SO_RCVTIMEO     0x1006          /* receive timeout */

#define SO_ERROR        0x1007          /* get error status and clear */

#define SO_TYPE         0x1008          /* get socket type */

/*efine SO_PRIVSTATE    0x1009             get/deny privileged state */

/*

 * Structure used for manipulating linger option.

 */

struct  linger {

        int     l_onoff;                /* option on/off */

        int     l_linger;               /* linger time */

};

struct  accept_filter_arg {

        char    af_name[16];

        char    af_arg[256-16];

};

/*

 * Level number for (get/set)sockopt() to apply to socket itself.

 */

#define SOL_SOCKET      0xffff          /* options for socket level */

/*

 * Address families.

 */

#define AF_UNSPEC       0                /* unspecified */

#define AF_LOCAL        1               /* local to host (pipes, portals) */

#define AF_UNIX         AF_LOCAL        /* backward compatibility */

#define AF_INET         2               /* internetwork: UDP, TCP, etc. */

#define AF_IMPLINK      3               /* arpanet imp addresses */

#define AF_PUP          4               /* pup protocols: e.g. BSP */

#define AF_CHAOS        5               /* mit CHAOS protocols */

#define AF_NS           6               /* XEROX NS protocols */

#define AF_ISO          7               /* ISO protocols */

#define AF_OSI          AF_ISO

#define AF_ECMA         8               /* European computer manufacturers */

#define AF_DATAKIT      9               /* datakit protocols */

#define AF_CCITT        10              /* CCITT protocols, X.25 etc */

#define AF_SNA          11              /* IBM SNA */

#define AF_DECnet       12              /* DECnet */

#define AF_DLI          13              /* DEC Direct data link interface */

#define AF_LAT          14              /* LAT */

#define AF_HYLINK       15              /* NSC Hyperchannel */

#define AF_APPLETALK    16              /* Apple Talk */

#define AF_ROUTE        17              /* Internal Routing Protocol */

#define AF_LINK         18              /* Link layer interface */

#define pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */

#define AF_COIP         20              /* connection-oriented IP, aka ST II */

#define AF_CNT          21              /* Computer Network Technology */

#define pseudo_AF_RTIP  22              /* Help Identify RTIP packets */

#define AF_IPX          23              /* Novell Internet Protocol */

#define AF_SIP          24              /* Simple Internet Protocol */

#define pseudo_AF_PIP   25              /* Help Identify PIP packets */

#define AF_ISDN         26              /* Integrated Services Digital Network*/

#define AF_E164         AF_ISDN         /* CCITT E.164 recommendation */

#define pseudo_AF_KEY   27              /* Internal key-management function */

#define AF_INET6        28              /* IPv6 */

#define AF_NATM         29              /* native ATM access */

#define AF_ATM          30              /* ATM */

#define pseudo_AF_HDRCMPLT 31           /* Used by BPF to not rewrite headers

                                         * in interface output routine

                                         */

#define AF_NETGRAPH     32              /* Netgraph sockets */

#define AF_MAX          33

/*

 * Structure used by kernel to store most

 * addresses.

 */

struct sockaddr {

        u_char          sa_len;         /* total length */

        sa_family_t     sa_family;      /* address family */

        char            sa_data[30];    /* actually longer; address value */

};

#define SOCK_MAXADDRLEN 255             /* longest possible addresses */

/*

 * Structure used by kernel to pass protocol

 * information in raw sockets.

 */

struct sockproto {

        u_short sp_family;              /* address family */

        u_short sp_protocol;            /* protocol */

};

/*

 * RFC 2553: protocol-independent placeholder for socket addresses

 */

#define _SS_MAXSIZE     128

#define _SS_ALIGNSIZE   (sizeof(int64_t))

#define _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(u_char) - sizeof(sa_family_t))

#define _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(u_char) - sizeof(sa_family_t) - \

                                _SS_PAD1SIZE - _SS_ALIGNSIZE)

struct sockaddr_storage {

        u_char          ss_len;         /* address length */

        sa_family_t     ss_family;      /* address family */

        char            __ss_pad1[_SS_PAD1SIZE];

        int64_t         __ss_align;     /* force desired structure storage alignment */

        char            __ss_pad2[_SS_PAD2SIZE];

};

/*

 * Protocol families, same as address families for now.

 */

#define PF_UNSPEC       AF_UNSPEC

#define PF_LOCAL        AF_LOCAL

#define PF_UNIX         PF_LOCAL        /* backward compatibility */

#define PF_INET         AF_INET

#define PF_IMPLINK      AF_IMPLINK

#define PF_PUP          AF_PUP

#define PF_CHAOS        AF_CHAOS

#define PF_NS           AF_NS

#define PF_ISO          AF_ISO

#define PF_OSI          AF_ISO

#define PF_ECMA         AF_ECMA

#define PF_DATAKIT      AF_DATAKIT

#define PF_CCITT        AF_CCITT

#define PF_SNA          AF_SNA

#define PF_DECnet       AF_DECnet

#define PF_DLI          AF_DLI

#define PF_LAT          AF_LAT

#define PF_HYLINK       AF_HYLINK

#define PF_APPLETALK    AF_APPLETALK

#define PF_ROUTE        AF_ROUTE

#define PF_LINK         AF_LINK

#define PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */

#define PF_COIP         AF_COIP

#define PF_CNT          AF_CNT

#define PF_SIP          AF_SIP

#define PF_IPX          AF_IPX          /* same format as AF_NS */

#define PF_RTIP         pseudo_AF_RTIP  /* same format as AF_INET */

#define PF_PIP          pseudo_AF_PIP

#define PF_ISDN         AF_ISDN

#define PF_KEY          pseudo_AF_KEY

#define PF_INET6        AF_INET6

#define PF_NATM         AF_NATM

#define PF_ATM          AF_ATM

#define PF_NETGRAPH     AF_NETGRAPH

#define PF_MAX          AF_MAX

/*

 * Definitions for network related sysctl, CTL_NET.

 *

 * Second level is protocol family.

 * Third level is protocol number.

 *

 * Further levels are defined by the individual families below.

 */

#define NET_MAXID       AF_MAX

#define CTL_NET_NAMES { \

        { 0, 0 }, \

        { "unix", CTLTYPE_NODE }, \

        { "inet", CTLTYPE_NODE }, \

        { "implink", CTLTYPE_NODE }, \

        { "pup", CTLTYPE_NODE }, \

        { "chaos", CTLTYPE_NODE }, \

        { "xerox_ns", CTLTYPE_NODE }, \

        { "iso", CTLTYPE_NODE }, \

        { "emca", CTLTYPE_NODE }, \

        { "datakit", CTLTYPE_NODE }, \

        { "ccitt", CTLTYPE_NODE }, \

        { "ibm_sna", CTLTYPE_NODE }, \

        { "decnet", CTLTYPE_NODE }, \

        { "dec_dli", CTLTYPE_NODE }, \

        { "lat", CTLTYPE_NODE }, \

        { "hylink", CTLTYPE_NODE }, \

        { "appletalk", CTLTYPE_NODE }, \

        { "route", CTLTYPE_NODE }, \

        { "link_layer", CTLTYPE_NODE }, \

        { "xtp", CTLTYPE_NODE }, \

        { "coip", CTLTYPE_NODE }, \

        { "cnt", CTLTYPE_NODE }, \

        { "rtip", CTLTYPE_NODE }, \

        { "ipx", CTLTYPE_NODE }, \

        { "sip", CTLTYPE_NODE }, \

        { "pip", CTLTYPE_NODE }, \

        { "isdn", CTLTYPE_NODE }, \

        { "key", CTLTYPE_NODE }, \

        { "inet6", CTLTYPE_NODE }, \

        { "natm", CTLTYPE_NODE }, \

        { "atm", CTLTYPE_NODE }, \

        { "hdrcomplete", CTLTYPE_NODE }, \

        { "netgraph", CTLTYPE_NODE }, \

}

/*

 * PF_ROUTE - Routing table

 *

 * Three additional levels are defined:

 *      Fourth: address family, 0 is wildcard

 *      Fifth: type of info, defined below

 *      Sixth: flag(s) to mask with for NET_RT_FLAGS

 */

#define NET_RT_DUMP     1               /* dump; may limit to a.f. */

#define NET_RT_FLAGS    2               /* by flags, e.g. RESOLVING */

#define NET_RT_IFLIST   3               /* survey interface list */

#define NET_RT_MAXID    4

#define CTL_NET_RT_NAMES { \

        { 0, 0 }, \

        { "dump", CTLTYPE_STRUCT }, \

        { "flags", CTLTYPE_STRUCT }, \

        { "iflist", CTLTYPE_STRUCT }, \

}

/*

 * Maximum queue length specifiable by listen.

 */

#define SOMAXCONN       128

/*

 * Message header for recvmsg and sendmsg calls.

 * Used value-result for recvmsg, value only for sendmsg.

 */

struct msghdr {

        void            *msg_name;              /* optional address */

        socklen_t        msg_namelen;           /* size of address */

        struct iovec    *msg_iov;               /* scatter/gather array */

        int              msg_iovlen;            /* # elements in msg_iov */

        void            *msg_control;           /* ancillary data, see below */

        socklen_t        msg_controllen;        /* ancillary data buffer len */

        int              msg_flags;             /* flags on received message */

};

#define MSG_OOB         0x1             /* process out-of-band data */

#define MSG_PEEK        0x2             /* peek at incoming message */

#define MSG_DONTROUTE   0x4             /* send without using routing tables */

#define MSG_EOR         0x8             /* data completes record */

#define MSG_TRUNC       0x10            /* data discarded before delivery */

#define MSG_CTRUNC      0x20            /* control data lost before delivery */

#define MSG_WAITALL     0x40            /* wait for full request or error */

#define MSG_DONTWAIT    0x80            /* this message should be nonblocking */

#define MSG_EOF         0x100           /* data completes connection */

#define MSG_COMPAT      0x8000          /* used in sendit() */

/*

 * Header for ancillary data objects in msg_control buffer.

 * Used for additional information with/about a datagram

 * not expressible by flags.  The format is a sequence

 * of message elements headed by cmsghdr structures.

 */

struct cmsghdr {

        socklen_t       cmsg_len;               /* data byte count, including hdr */

        int             cmsg_level;             /* originating protocol */

        int             cmsg_type;              /* protocol-specific type */

/* followed by  u_char  cmsg_data[]; */

};

/*

 * While we may have more groups than this, the cmsgcred struct must

 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow

 * this.

*/

#define CMGROUP_MAX 16

/*

 * Credentials structure, used to verify the identity of a peer

 * process that has sent us a message. This is allocated by the

 * peer process but filled in by the kernel. This prevents the

 * peer from lying about its identity. (Note that cmcred_groups[0]

 * is the effective GID.)

 */

struct cmsgcred {

        pid_t   cmcred_pid;             /* PID of sending process */

        uid_t   cmcred_uid;             /* real UID of sending process */

        uid_t   cmcred_euid;            /* effective UID of sending process */

        gid_t   cmcred_gid;             /* real GID of sending process */

        short   cmcred_ngroups;         /* number or groups */

        gid_t   cmcred_groups[CMGROUP_MAX];     /* groups */

};

/* given pointer to struct cmsghdr, return pointer to data */

#define CMSG_DATA(cmsg)         ((u_char *)(cmsg) + \

                                 _ALIGN(sizeof(struct cmsghdr)))

/* given pointer to struct cmsghdr, return pointer to next cmsghdr */

#define CMSG_NXTHDR(mhdr, cmsg) \

        (((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \

          _ALIGN(sizeof(struct cmsghdr)) > \

            (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \

            (struct cmsghdr *)NULL : \

            (struct cmsghdr *)((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len)))

/*

 * RFC 2292 requires to check msg_controllen, in case that the kernel returns

 * an empty list for some reasons.

 */

#define CMSG_FIRSTHDR(mhdr) \

        ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \

         (struct cmsghdr *)(mhdr)->msg_control : \

         (struct cmsghdr *)NULL)

/* RFC 2292 additions */

#define CMSG_SPACE(l)           (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))

#define CMSG_LEN(l)             (_ALIGN(sizeof(struct cmsghdr)) + (l))

#ifdef _KERNEL

#define CMSG_ALIGN(n)   _ALIGN(n)

#endif

/* "Socket"-level control message types: */

#define SCM_RIGHTS      0x01            /* access rights (array of int) */

#define SCM_TIMESTAMP   0x02            /* timestamp (struct timeval) */

#define SCM_CREDS       0x03            /* process creds (struct cmsgcred) */

/*

 * 4.3 compat sockaddr, move to compat file later

 */

struct osockaddr {

        u_short sa_family;              /* address family */

        char    sa_data[14];            /* up to 14 bytes of direct address */

};

/*

 * 4.3-compat message header (move to compat file later).

 */

struct omsghdr {

        caddr_t msg_name;               /* optional address */

        int     msg_namelen;            /* size of address */

        struct  iovec *msg_iov;         /* scatter/gather array */

        int     msg_iovlen;             /* # elements in msg_iov */

        caddr_t msg_accrights;          /* access rights sent/received */

        int     msg_accrightslen;

};

/*

 * howto arguments for shutdown(2), specified by Posix.1g.

 */

#define SHUT_RD         0                /* shut down the reading side */

#define SHUT_WR         1               /* shut down the writing side */

#define SHUT_RDWR       2               /* shut down both sides */

/*

 * sendfile(2) header/trailer struct

 */

struct sf_hdtr {

        struct iovec *headers;  /* pointer to an array of header struct iovec's */

        int hdr_cnt;            /* number of header iovec's */

        struct iovec *trailers; /* pointer to an array of trailer struct iovec's */

        int trl_cnt;            /* number of trailer iovec's */

};

#ifndef _KERNEL

#include <sys/param.h>

__BEGIN_DECLS

int     accept __P((int, struct sockaddr *, socklen_t *));

int     bind __P((int, const struct sockaddr *, socklen_t));

int     connect __P((int, const struct sockaddr *, socklen_t));

int     getpeername __P((int, struct sockaddr *, socklen_t *));

int     getsockname __P((int, struct sockaddr *, socklen_t *));

int     getsockopt __P((int, int, int, void *, socklen_t *));

int     listen __P((int, int));

ssize_t recv __P((int, void *, size_t, int));

ssize_t recvfrom __P((int, void *, size_t, int, struct sockaddr *, socklen_t *));

ssize_t recvmsg __P((int, struct msghdr *, int));

ssize_t send __P((int, const void *, size_t, int));

ssize_t sendto __P((int, const void *,

            size_t, int, const struct sockaddr *, socklen_t));

ssize_t sendmsg __P((int, const struct msghdr *, int));

int     sendfile __P((int, int, off_t, size_t, struct sf_hdtr *, off_t *, int));

int     setsockopt __P((int, int, int, const void *, socklen_t));

int     shutdown __P((int, int));

int     socket __P((int, int, int));

int     socketpair __P((int, int, int, int *));

void    pfctlinput __P((int, struct sockaddr *));

__END_DECLS

#endif /* !_KERNEL */

#endif /* !_SYS_SOCKET_H_ */