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Annotation of Net2/sys/socket.h, revision 1.1

1.1     ! root        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:  *
        !            33:  *     @(#)socket.h    7.13 (Berkeley) 4/20/91
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * Definitions related to sockets: types, address families, options.
        !            38:  */
        !            39: 
        !            40: /*
        !            41:  * Types
        !            42:  */
        !            43: #define        SOCK_STREAM     1               /* stream socket */
        !            44: #define        SOCK_DGRAM      2               /* datagram socket */
        !            45: #define        SOCK_RAW        3               /* raw-protocol interface */
        !            46: #define        SOCK_RDM        4               /* reliably-delivered message */
        !            47: #define        SOCK_SEQPACKET  5               /* sequenced packet stream */
        !            48: 
        !            49: /*
        !            50:  * Option flags per-socket.
        !            51:  */
        !            52: #define        SO_DEBUG        0x0001          /* turn on debugging info recording */
        !            53: #define        SO_ACCEPTCONN   0x0002          /* socket has had listen() */
        !            54: #define        SO_REUSEADDR    0x0004          /* allow local address reuse */
        !            55: #define        SO_KEEPALIVE    0x0008          /* keep connections alive */
        !            56: #define        SO_DONTROUTE    0x0010          /* just use interface addresses */
        !            57: #define        SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
        !            58: #define        SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
        !            59: #define        SO_LINGER       0x0080          /* linger on close if data present */
        !            60: #define        SO_OOBINLINE    0x0100          /* leave received OOB data in line */
        !            61: 
        !            62: /*
        !            63:  * Additional options, not kept in so_options.
        !            64:  */
        !            65: #define SO_SNDBUF      0x1001          /* send buffer size */
        !            66: #define SO_RCVBUF      0x1002          /* receive buffer size */
        !            67: #define SO_SNDLOWAT    0x1003          /* send low-water mark */
        !            68: #define SO_RCVLOWAT    0x1004          /* receive low-water mark */
        !            69: #define SO_SNDTIMEO    0x1005          /* send timeout */
        !            70: #define SO_RCVTIMEO    0x1006          /* receive timeout */
        !            71: #define        SO_ERROR        0x1007          /* get error status and clear */
        !            72: #define        SO_TYPE         0x1008          /* get socket type */
        !            73: 
        !            74: /*
        !            75:  * Structure used for manipulating linger option.
        !            76:  */
        !            77: struct linger {
        !            78:        int     l_onoff;                /* option on/off */
        !            79:        int     l_linger;               /* linger time */
        !            80: };
        !            81: 
        !            82: /*
        !            83:  * Level number for (get/set)sockopt() to apply to socket itself.
        !            84:  */
        !            85: #define        SOL_SOCKET      0xffff          /* options for socket level */
        !            86: 
        !            87: /*
        !            88:  * Address families.
        !            89:  */
        !            90: #define        AF_UNSPEC       0               /* unspecified */
        !            91: #define        AF_UNIX         1               /* local to host (pipes, portals) */
        !            92: #define        AF_INET         2               /* internetwork: UDP, TCP, etc. */
        !            93: #define        AF_IMPLINK      3               /* arpanet imp addresses */
        !            94: #define        AF_PUP          4               /* pup protocols: e.g. BSP */
        !            95: #define        AF_CHAOS        5               /* mit CHAOS protocols */
        !            96: #define        AF_NS           6               /* XEROX NS protocols */
        !            97: #define        AF_ISO          7               /* ISO protocols */
        !            98: #define        AF_OSI          AF_ISO
        !            99: #define        AF_ECMA         8               /* european computer manufacturers */
        !           100: #define        AF_DATAKIT      9               /* datakit protocols */
        !           101: #define        AF_CCITT        10              /* CCITT protocols, X.25 etc */
        !           102: #define        AF_SNA          11              /* IBM SNA */
        !           103: #define AF_DECnet      12              /* DECnet */
        !           104: #define AF_DLI         13              /* DEC Direct data link interface */
        !           105: #define AF_LAT         14              /* LAT */
        !           106: #define        AF_HYLINK       15              /* NSC Hyperchannel */
        !           107: #define        AF_APPLETALK    16              /* Apple Talk */
        !           108: #define        AF_ROUTE        17              /* Internal Routing Protocol */
        !           109: #define        AF_LINK         18              /* Link layer interface */
        !           110: #define        pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */
        !           111: 
        !           112: #define        AF_MAX          20
        !           113: 
        !           114: /*
        !           115:  * Structure used by kernel to store most
        !           116:  * addresses.
        !           117:  */
        !           118: struct sockaddr {
        !           119:        u_char  sa_len;                 /* total length */
        !           120:        u_char  sa_family;              /* address family */
        !           121:        char    sa_data[14];            /* actually longer; address value */
        !           122: };
        !           123: 
        !           124: /*
        !           125:  * Structure used by kernel to pass protocol
        !           126:  * information in raw sockets.
        !           127:  */
        !           128: struct sockproto {
        !           129:        u_short sp_family;              /* address family */
        !           130:        u_short sp_protocol;            /* protocol */
        !           131: };
        !           132: 
        !           133: /*
        !           134:  * Protocol families, same as address families for now.
        !           135:  */
        !           136: #define        PF_UNSPEC       AF_UNSPEC
        !           137: #define        PF_UNIX         AF_UNIX
        !           138: #define        PF_INET         AF_INET
        !           139: #define        PF_IMPLINK      AF_IMPLINK
        !           140: #define        PF_PUP          AF_PUP
        !           141: #define        PF_CHAOS        AF_CHAOS
        !           142: #define        PF_NS           AF_NS
        !           143: #define        PF_ISO          AF_ISO
        !           144: #define        PF_OSI          AF_ISO
        !           145: #define        PF_ECMA         AF_ECMA
        !           146: #define        PF_DATAKIT      AF_DATAKIT
        !           147: #define        PF_CCITT        AF_CCITT
        !           148: #define        PF_SNA          AF_SNA
        !           149: #define PF_DECnet      AF_DECnet
        !           150: #define PF_DLI         AF_DLI
        !           151: #define PF_LAT         AF_LAT
        !           152: #define        PF_HYLINK       AF_HYLINK
        !           153: #define        PF_APPLETALK    AF_APPLETALK
        !           154: #define        PF_ROUTE        AF_ROUTE
        !           155: #define        PF_LINK         AF_LINK
        !           156: #define        PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */
        !           157: 
        !           158: #define        PF_MAX          AF_MAX
        !           159: 
        !           160: /*
        !           161:  * Maximum queue length specifiable by listen.
        !           162:  */
        !           163: #define        SOMAXCONN       5
        !           164: 
        !           165: /*
        !           166:  * Message header for recvmsg and sendmsg calls.
        !           167:  * Used value-result for recvmsg, value only for sendmsg.
        !           168:  */
        !           169: struct msghdr {
        !           170:        caddr_t msg_name;               /* optional address */
        !           171:        u_int   msg_namelen;            /* size of address */
        !           172:        struct  iovec *msg_iov;         /* scatter/gather array */
        !           173:        u_int   msg_iovlen;             /* # elements in msg_iov */
        !           174:        caddr_t msg_control;            /* ancillary data, see below */
        !           175:        u_int   msg_controllen;         /* ancillary data buffer len */
        !           176:        int     msg_flags;              /* flags on received message */
        !           177: };
        !           178: 
        !           179: #define        MSG_OOB         0x1             /* process out-of-band data */
        !           180: #define        MSG_PEEK        0x2             /* peek at incoming message */
        !           181: #define        MSG_DONTROUTE   0x4             /* send without using routing tables */
        !           182: #define        MSG_EOR         0x8             /* data completes record */
        !           183: #define        MSG_TRUNC       0x10            /* data discarded before delivery */
        !           184: #define        MSG_CTRUNC      0x20            /* control data lost before delivery */
        !           185: #define        MSG_WAITALL     0x40            /* wait for full request or error */
        !           186: 
        !           187: /*
        !           188:  * Header for ancillary data objects in msg_control buffer.
        !           189:  * Used for additional information with/about a datagram
        !           190:  * not expressible by flags.  The format is a sequence
        !           191:  * of message elements headed by cmsghdr structures.
        !           192:  */
        !           193: struct cmsghdr {
        !           194:        u_int   cmsg_len;               /* data byte count, including hdr */
        !           195:        int     cmsg_level;             /* originating protocol */
        !           196:        int     cmsg_type;              /* protocol-specific type */
        !           197: /* followed by u_char  cmsg_data[]; */
        !           198: };
        !           199: 
        !           200: /* given pointer to struct adatahdr, return pointer to data */
        !           201: #define        CMSG_DATA(cmsg)         ((u_char *)((cmsg) + 1))
        !           202: 
        !           203: /* given pointer to struct adatahdr, return pointer to next adatahdr */
        !           204: #define        CMSG_NXTHDR(mhdr, cmsg) \
        !           205:        (((caddr_t)(cmsg) + (cmsg)->cmsg_len + sizeof(struct cmsghdr) > \
        !           206:            (mhdr)->msg_control + (mhdr)->msg_controllen) ? \
        !           207:            (struct cmsghdr *)NULL : \
        !           208:            (struct cmsghdr *)((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len)))
        !           209: 
        !           210: #define        CMSG_FIRSTHDR(mhdr)     ((struct cmsghdr *)(mhdr)->msg_control)
        !           211: 
        !           212: /* "Socket"-level control message types: */
        !           213: #define        SCM_RIGHTS      0x01            /* access rights (array of int) */
        !           214: 
        !           215: /*
        !           216:  * 4.3 compat sockaddr, move to compat file later
        !           217:  */
        !           218: struct osockaddr {
        !           219:        u_short sa_family;              /* address family */
        !           220:        char    sa_data[14];            /* up to 14 bytes of direct address */
        !           221: };
        !           222: 
        !           223: /*
        !           224:  * 4.3-compat message header (move to compat file later).
        !           225:  */
        !           226: struct omsghdr {
        !           227:        caddr_t msg_name;               /* optional address */
        !           228:        int     msg_namelen;            /* size of address */
        !           229:        struct  iovec *msg_iov;         /* scatter/gather array */
        !           230:        int     msg_iovlen;             /* # elements in msg_iov */
        !           231:        caddr_t msg_accrights;          /* access rights sent/received */
        !           232:        int     msg_accrightslen;
        !           233: };
        !           234: 
        !           235: #ifndef        KERNEL
        !           236: 
        !           237: #include <sys/cdefs.h>
        !           238: 
        !           239: __BEGIN_DECLS
        !           240: int    accept __P((int, struct sockaddr *, int *));
        !           241: int    bind __P((int, const struct sockaddr *, int));
        !           242: int    connect __P((int, const struct sockaddr *, int));
        !           243: int    getpeername __P((int, struct sockaddr *, int *));
        !           244: int    getsockname __P((int, struct sockaddr *, int *));
        !           245: int    getsockopt __P((int, int, int, void *, int *));
        !           246: int    listen __P((int, int));
        !           247: int    recv __P((int, void *, int, int));
        !           248: int    recvfrom __P((int, void *, int, int,
        !           249:                struct sockaddr *, int *));
        !           250: int    recvmsg __P((int, struct msghdr *, int));
        !           251: int    send __P((int, const void *, int, int));
        !           252: int    sendto __P((int, const void *, int, int, const struct sockaddr *, int));
        !           253: int    sendmsg __P((int, const struct msghdr *, int));
        !           254: int    setsockopt __P((int, int, int, const void *, int));
        !           255: int    shutdown __P((int, int));
        !           256: int    socket __P((int, int, int));
        !           257: int    socketpair __P((int, int, int, int *));
        !           258: __END_DECLS
        !           259: 
        !           260: #endif /* !KERNEL */

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