socket.h

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/*
 * 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.
 * 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 1.88 2005/04/13 00:01:46 mdodd Exp $
 */


#ifndef _SYS_SOCKET_H_
#define _SYS_SOCKET_H_

#include <sys/cdefs.h>
#include <rtems/bsdnet/_types.h>
#include <sys/types.h>

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

/*
 * Data types.
 */

#ifndef _SA_FAMILY_T_DECLARED
typedef __sa_family_t   sa_family_t;
#define _SA_FAMILY_T_DECLARED
#endif

#ifndef _SOCKLEN_T_DECLARED
typedef __socklen_t     socklen_t;
#define _SOCKLEN_T_DECLARED
#endif

/*
 * Types
 */
#define SOCK_STREAM     1               /* stream socket */
#define SOCK_DGRAM      2               /* datagram socket */
#define SOCK_RAW        3               /* raw-protocol interface */
#if __BSD_VISIBLE
#define SOCK_RDM        4               /* reliably-delivered message */
#endif
#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 */
#if __BSD_VISIBLE
#define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
#endif
#define SO_LINGER       0x0080          /* linger on close if data present */
#define SO_OOBINLINE    0x0100          /* leave received OOB data in line */
#if __BSD_VISIBLE
#define SO_REUSEPORT    0x0200          /* allow local address & port reuse */
#define SO_TIMESTAMP    0x0400          /* timestamp received dgram traffic */
#define SO_NOSIGPIPE    0x0800          /* no SIGPIPE from EPIPE */
#define SO_ACCEPTFILTER 0x1000          /* there is an accept filter */
#define SO_BINTIME      0x2000          /* timestamp received dgram traffic */
#endif

/*
 * 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 */
#define SO_PRIVSTATE    0x1009          /* get/deny privileged state */

/*
 * RTEMS addition: get and set wakeup functions.
 */
#define SO_SNDWAKEUP    0x1020          /* wakeup when ready to send */
#define SO_RCVWAKEUP    0x1021          /* wakeup when ready to receive */

/*
 * Structure used for manipulating linger option.
 */
struct  linger {
        int     l_onoff;                /* option on/off */
        int     l_linger;               /* linger time */
};

/*
 * RTEMS addition: structure used to get and set wakeup function.
 */
struct socket;
struct  sockwakeup {
        void    (*sw_pfn)(struct socket *, void *);
        void    *sw_arg;
};

/*
 * 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 */
#if __BSD_VISIBLE
#define AF_LOCAL        AF_UNIX         /* local to host (pipes, portals) */
#endif
#define AF_UNIX         1               /* standardized name for AF_LOCAL */
#define AF_INET         2               /* internetwork: UDP, TCP, etc. */
#if __BSD_VISIBLE
#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_NETBIOS      6               /* SMB 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 */
#endif
#define AF_INET6        28              /* IPv6 */

#define AF_MAX          29

/*
 * Structure used by kernel to store most
 * addresses.
 */
struct sockaddr {
        unsigned char   sa_len;                 /* total length */
        sa_family_t     sa_family;              /* address family */
        char    sa_data[14];            /* actually longer; address value */
};

/*
 * Structure used by kernel to pass protocol
 * information in raw sockets.
 */
struct sockproto {
        unsigned short  sp_family;              /* address family */
        unsigned short  sp_protocol;            /* protocol */
};

/*
 * 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_NETBIOS      AF_NETBIOS
#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
#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_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 }, \
}

/*
 * 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 */
#if __BSD_VISIBLE
#define MSG_DONTWAIT    0x80            /* this message should be nonblocking */
#define MSG_EOF         0x100           /* data completes connection */
#define MSG_COMPAT      0x8000          /* used in sendit() */
#endif

/*
 * 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[]; */
};

/* given pointer to struct cmsghdr, return pointer to data */
#define CMSG_DATA(cmsg)         ((u_char *)((cmsg) + 1))

/* given pointer to struct cmsghdr, return pointer to next cmsghdr */
#define CMSG_NXTHDR(mhdr, cmsg) \
        (((caddr_t)(cmsg) + (cmsg)->cmsg_len + sizeof(struct cmsghdr) > \
            (mhdr)->msg_control + (mhdr)->msg_controllen) ? \
            (struct cmsghdr *)NULL : \
            (struct cmsghdr *)((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len)))

#define CMSG_FIRSTHDR(mhdr)     ((struct cmsghdr *)(mhdr)->msg_control)

/* "Socket"-level control message types: */
#define SCM_RIGHTS      0x01            /* access rights (array of int) */
#define SCM_TIMESTAMP   0x02            /* timestamp (struct timeval) */

/*
 * 4.3 compat sockaddr, move to compat file later
 */
struct osockaddr {
        unsigned 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 {
        char    *msg_name;              /* optional address */
        int     msg_namelen;            /* size of address */
        struct  iovec *msg_iov;         /* scatter/gather array */
        int     msg_iovlen;             /* # elements in msg_iov */
        char    *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 */

#ifndef _KERNEL

__BEGIN_DECLS
int     accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
int     bind(int, const struct sockaddr *, socklen_t);
int     connect(int, const struct sockaddr *, socklen_t);
int     getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
int     getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
int     getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);
int     listen(int, int);
ssize_t recv(int, void *, size_t, int);
ssize_t recvfrom(int, void *, size_t, int, struct sockaddr * __restrict, socklen_t * __restrict);
ssize_t recvmsg(int, struct msghdr *, int);
ssize_t send(int, const void *, size_t, int);
ssize_t sendto(int, const void *,
            size_t, int, const struct sockaddr *, socklen_t);
ssize_t sendmsg(int, const struct msghdr *, int);
int     setsockopt(int, int, int, const void *, socklen_t);
int     shutdown(int, int);
int     socket(int, int, int);
int     socketpair(int, int, int, int *);
__END_DECLS

#endif /* !_KERNEL */

#endif /* !_SYS_SOCKET_H_ */