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Annotation of src/sys/sys/socket.h, Revision 1.1.1.1

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:  *
                     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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