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Annotation of src/sys/sys/socket.h, Revision 1.5

1.1       cgd         1: /*
                      2:  * Copyright (c) 1982,1985,1986,1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This product includes software developed by the University of
                     16:  *     California, Berkeley and its contributors.
                     17:  * 4. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  *
1.4       cgd        33:  *     from: @(#)socket.h      7.13 (Berkeley) 4/20/91
1.5     ! andrew     34:  *     $Id: socket.h,v 1.4 1993/05/20 16:23:09 cgd Exp $
1.1       cgd        35:  */
                     36:
1.2       mycroft    37: #ifndef _SYS_SOCKET_H_
                     38: #define _SYS_SOCKET_H_
                     39:
1.1       cgd        40: /*
                     41:  * Definitions related to sockets: types, address families, options.
                     42:  */
                     43:
                     44: /*
                     45:  * Types
                     46:  */
                     47: #define        SOCK_STREAM     1               /* stream socket */
                     48: #define        SOCK_DGRAM      2               /* datagram socket */
                     49: #define        SOCK_RAW        3               /* raw-protocol interface */
                     50: #define        SOCK_RDM        4               /* reliably-delivered message */
                     51: #define        SOCK_SEQPACKET  5               /* sequenced packet stream */
                     52:
                     53: /*
                     54:  * Option flags per-socket.
                     55:  */
                     56: #define        SO_DEBUG        0x0001          /* turn on debugging info recording */
                     57: #define        SO_ACCEPTCONN   0x0002          /* socket has had listen() */
                     58: #define        SO_REUSEADDR    0x0004          /* allow local address reuse */
                     59: #define        SO_KEEPALIVE    0x0008          /* keep connections alive */
                     60: #define        SO_DONTROUTE    0x0010          /* just use interface addresses */
                     61: #define        SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
                     62: #define        SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
                     63: #define        SO_LINGER       0x0080          /* linger on close if data present */
                     64: #define        SO_OOBINLINE    0x0100          /* leave received OOB data in line */
                     65:
                     66: /*
                     67:  * Additional options, not kept in so_options.
                     68:  */
                     69: #define SO_SNDBUF      0x1001          /* send buffer size */
                     70: #define SO_RCVBUF      0x1002          /* receive buffer size */
                     71: #define SO_SNDLOWAT    0x1003          /* send low-water mark */
                     72: #define SO_RCVLOWAT    0x1004          /* receive low-water mark */
                     73: #define SO_SNDTIMEO    0x1005          /* send timeout */
                     74: #define SO_RCVTIMEO    0x1006          /* receive timeout */
                     75: #define        SO_ERROR        0x1007          /* get error status and clear */
                     76: #define        SO_TYPE         0x1008          /* get socket type */
                     77:
                     78: /*
                     79:  * Structure used for manipulating linger option.
                     80:  */
                     81: struct linger {
                     82:        int     l_onoff;                /* option on/off */
                     83:        int     l_linger;               /* linger time */
                     84: };
                     85:
                     86: /*
                     87:  * Level number for (get/set)sockopt() to apply to socket itself.
                     88:  */
                     89: #define        SOL_SOCKET      0xffff          /* options for socket level */
                     90:
                     91: /*
                     92:  * Address families.
                     93:  */
                     94: #define        AF_UNSPEC       0               /* unspecified */
                     95: #define        AF_UNIX         1               /* local to host (pipes, portals) */
                     96: #define        AF_INET         2               /* internetwork: UDP, TCP, etc. */
                     97: #define        AF_IMPLINK      3               /* arpanet imp addresses */
                     98: #define        AF_PUP          4               /* pup protocols: e.g. BSP */
                     99: #define        AF_CHAOS        5               /* mit CHAOS protocols */
                    100: #define        AF_NS           6               /* XEROX NS protocols */
                    101: #define        AF_ISO          7               /* ISO protocols */
                    102: #define        AF_OSI          AF_ISO
                    103: #define        AF_ECMA         8               /* european computer manufacturers */
                    104: #define        AF_DATAKIT      9               /* datakit protocols */
                    105: #define        AF_CCITT        10              /* CCITT protocols, X.25 etc */
                    106: #define        AF_SNA          11              /* IBM SNA */
                    107: #define AF_DECnet      12              /* DECnet */
                    108: #define AF_DLI         13              /* DEC Direct data link interface */
                    109: #define AF_LAT         14              /* LAT */
                    110: #define        AF_HYLINK       15              /* NSC Hyperchannel */
                    111: #define        AF_APPLETALK    16              /* Apple Talk */
                    112: #define        AF_ROUTE        17              /* Internal Routing Protocol */
                    113: #define        AF_LINK         18              /* Link layer interface */
                    114: #define        pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */
                    115:
                    116: #define        AF_MAX          20
                    117:
                    118: /*
                    119:  * Structure used by kernel to store most
                    120:  * addresses.
                    121:  */
                    122: struct sockaddr {
                    123:        u_char  sa_len;                 /* total length */
                    124:        u_char  sa_family;              /* address family */
                    125:        char    sa_data[14];            /* actually longer; address value */
                    126: };
                    127:
                    128: /*
                    129:  * Structure used by kernel to pass protocol
                    130:  * information in raw sockets.
                    131:  */
                    132: struct sockproto {
                    133:        u_short sp_family;              /* address family */
                    134:        u_short sp_protocol;            /* protocol */
                    135: };
                    136:
                    137: /*
                    138:  * Protocol families, same as address families for now.
                    139:  */
                    140: #define        PF_UNSPEC       AF_UNSPEC
                    141: #define        PF_UNIX         AF_UNIX
                    142: #define        PF_INET         AF_INET
                    143: #define        PF_IMPLINK      AF_IMPLINK
                    144: #define        PF_PUP          AF_PUP
                    145: #define        PF_CHAOS        AF_CHAOS
                    146: #define        PF_NS           AF_NS
                    147: #define        PF_ISO          AF_ISO
                    148: #define        PF_OSI          AF_ISO
                    149: #define        PF_ECMA         AF_ECMA
                    150: #define        PF_DATAKIT      AF_DATAKIT
                    151: #define        PF_CCITT        AF_CCITT
                    152: #define        PF_SNA          AF_SNA
                    153: #define PF_DECnet      AF_DECnet
                    154: #define PF_DLI         AF_DLI
                    155: #define PF_LAT         AF_LAT
                    156: #define        PF_HYLINK       AF_HYLINK
                    157: #define        PF_APPLETALK    AF_APPLETALK
                    158: #define        PF_ROUTE        AF_ROUTE
                    159: #define        PF_LINK         AF_LINK
                    160: #define        PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */
                    161:
                    162: #define        PF_MAX          AF_MAX
                    163:
                    164: /*
                    165:  * Maximum queue length specifiable by listen.
                    166:  */
                    167: #define        SOMAXCONN       5
                    168:
                    169: /*
                    170:  * Message header for recvmsg and sendmsg calls.
                    171:  * Used value-result for recvmsg, value only for sendmsg.
                    172:  */
                    173: struct msghdr {
                    174:        caddr_t msg_name;               /* optional address */
                    175:        u_int   msg_namelen;            /* size of address */
                    176:        struct  iovec *msg_iov;         /* scatter/gather array */
                    177:        u_int   msg_iovlen;             /* # elements in msg_iov */
                    178:        caddr_t msg_control;            /* ancillary data, see below */
                    179:        u_int   msg_controllen;         /* ancillary data buffer len */
                    180:        int     msg_flags;              /* flags on received message */
                    181: };
                    182:
                    183: #define        MSG_OOB         0x1             /* process out-of-band data */
                    184: #define        MSG_PEEK        0x2             /* peek at incoming message */
                    185: #define        MSG_DONTROUTE   0x4             /* send without using routing tables */
                    186: #define        MSG_EOR         0x8             /* data completes record */
                    187: #define        MSG_TRUNC       0x10            /* data discarded before delivery */
                    188: #define        MSG_CTRUNC      0x20            /* control data lost before delivery */
                    189: #define        MSG_WAITALL     0x40            /* wait for full request or error */
                    190:
                    191: /*
                    192:  * Header for ancillary data objects in msg_control buffer.
                    193:  * Used for additional information with/about a datagram
                    194:  * not expressible by flags.  The format is a sequence
                    195:  * of message elements headed by cmsghdr structures.
                    196:  */
                    197: struct cmsghdr {
                    198:        u_int   cmsg_len;               /* data byte count, including hdr */
                    199:        int     cmsg_level;             /* originating protocol */
                    200:        int     cmsg_type;              /* protocol-specific type */
                    201: /* followed by u_char  cmsg_data[]; */
                    202: };
                    203:
                    204: /* given pointer to struct adatahdr, return pointer to data */
                    205: #define        CMSG_DATA(cmsg)         ((u_char *)((cmsg) + 1))
                    206:
                    207: /* given pointer to struct adatahdr, return pointer to next adatahdr */
                    208: #define        CMSG_NXTHDR(mhdr, cmsg) \
                    209:        (((caddr_t)(cmsg) + (cmsg)->cmsg_len + sizeof(struct cmsghdr) > \
                    210:            (mhdr)->msg_control + (mhdr)->msg_controllen) ? \
                    211:            (struct cmsghdr *)NULL : \
                    212:            (struct cmsghdr *)((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len)))
                    213:
                    214: #define        CMSG_FIRSTHDR(mhdr)     ((struct cmsghdr *)(mhdr)->msg_control)
                    215:
                    216: /* "Socket"-level control message types: */
                    217: #define        SCM_RIGHTS      0x01            /* access rights (array of int) */
                    218:
                    219: /*
                    220:  * 4.3 compat sockaddr, move to compat file later
                    221:  */
                    222: struct osockaddr {
                    223:        u_short sa_family;              /* address family */
                    224:        char    sa_data[14];            /* up to 14 bytes of direct address */
                    225: };
                    226:
                    227: /*
                    228:  * 4.3-compat message header (move to compat file later).
                    229:  */
                    230: struct omsghdr {
                    231:        caddr_t msg_name;               /* optional address */
                    232:        int     msg_namelen;            /* size of address */
                    233:        struct  iovec *msg_iov;         /* scatter/gather array */
                    234:        int     msg_iovlen;             /* # elements in msg_iov */
                    235:        caddr_t msg_accrights;          /* access rights sent/received */
                    236:        int     msg_accrightslen;
                    237: };
                    238:
1.5     ! andrew    239: #ifdef KERNEL
        !           240:
        !           241: /* structure prototypes */
        !           242: struct socket;
        !           243: struct mbuf;
        !           244:
        !           245: /* function prototypes */
        !           246: int    socreate __P((int dom, struct socket **aso, int type, int proto));
        !           247: int    sobind __P((struct socket *so, struct mbuf *nam));
        !           248: int    solisten __P((struct socket *so, int backlog));
        !           249: int    sofree __P((struct socket *so));
        !           250: int    soclose __P((struct socket *so));
        !           251: int    soabort __P((struct socket *so));
        !           252: int    soaccept __P((struct socket *so, struct mbuf *nam));
        !           253: int    soconnect __P((struct socket *so, struct mbuf *nam));
        !           254: int    soconnect2 __P((struct socket *so1, struct socket *so2));
        !           255: int    sodisconnect __P((struct socket *so));
        !           256: int    sosend __P((struct socket *so, struct mbuf *addr, struct uio *uio,
        !           257:                struct mbuf *top, struct mbuf *control, int flags));
        !           258: int    soreceive __P((struct socket *so, struct mbuf **paddr, struct uio *uio,
        !           259:                struct mbuf **mp0, struct mbuf **controlp, int *flagsp));
        !           260:
        !           261: void   socantsendmore __P((struct socket *so));
        !           262: void   socantrcvmore __P((struct socket *so));
        !           263:
        !           264: #else  /* !KERNEL */
1.1       cgd       265:
                    266: #include <sys/cdefs.h>
                    267:
                    268: __BEGIN_DECLS
                    269: int    accept __P((int, struct sockaddr *, int *));
                    270: int    bind __P((int, const struct sockaddr *, int));
                    271: int    connect __P((int, const struct sockaddr *, int));
                    272: int    getpeername __P((int, struct sockaddr *, int *));
                    273: int    getsockname __P((int, struct sockaddr *, int *));
                    274: int    getsockopt __P((int, int, int, void *, int *));
                    275: int    listen __P((int, int));
                    276: int    recv __P((int, void *, int, int));
                    277: int    recvfrom __P((int, void *, int, int,
                    278:                struct sockaddr *, int *));
                    279: int    recvmsg __P((int, struct msghdr *, int));
                    280: int    send __P((int, const void *, int, int));
                    281: int    sendto __P((int, const void *, int, int, const struct sockaddr *, int));
                    282: int    sendmsg __P((int, const struct msghdr *, int));
                    283: int    setsockopt __P((int, int, int, const void *, int));
                    284: int    shutdown __P((int, int));
                    285: int    socket __P((int, int, int));
                    286: int    socketpair __P((int, int, int, int *));
                    287: __END_DECLS
                    288:
1.3       mycroft   289: #endif /* !KERNEL */
1.2       mycroft   290:
                    291: #endif /* !_SYS_SOCKET_H_ */

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