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Annotation of src/sys/sys/socket.h, Revision 1.63

1.63    ! kleink      1: /*     $NetBSD: socket.h,v 1.62 2001/09/07 08:13:01 itojun Exp $       */
1.44      itojun      2:
                      3: /*
                      4:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  * 3. Neither the name of the project nor the names of its contributors
                     16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
1.10      cgd        31:
1.1       cgd        32: /*
1.8       mycroft    33:  * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
                     34:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd        35:  *
                     36:  * Redistribution and use in source and binary forms, with or without
                     37:  * modification, are permitted provided that the following conditions
                     38:  * are met:
                     39:  * 1. Redistributions of source code must retain the above copyright
                     40:  *    notice, this list of conditions and the following disclaimer.
                     41:  * 2. Redistributions in binary form must reproduce the above copyright
                     42:  *    notice, this list of conditions and the following disclaimer in the
                     43:  *    documentation and/or other materials provided with the distribution.
                     44:  * 3. All advertising materials mentioning features or use of this software
                     45:  *    must display the following acknowledgement:
                     46:  *     This product includes software developed by the University of
                     47:  *     California, Berkeley and its contributors.
                     48:  * 4. Neither the name of the University nor the names of its contributors
                     49:  *    may be used to endorse or promote products derived from this software
                     50:  *    without specific prior written permission.
                     51:  *
                     52:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     53:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     54:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     55:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     56:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     57:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     58:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     59:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     60:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     61:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     62:  * SUCH DAMAGE.
                     63:  *
1.28      fvdl       64:  *     @(#)socket.h    8.6 (Berkeley) 5/3/95
1.1       cgd        65:  */
                     66:
1.2       mycroft    67: #ifndef _SYS_SOCKET_H_
1.8       mycroft    68: #define        _SYS_SOCKET_H_
1.2       mycroft    69:
1.1       cgd        70: /*
                     71:  * Definitions related to sockets: types, address families, options.
                     72:  */
                     73:
                     74: /*
1.42      kleink     75:  * Data types.
                     76:  */
1.55      itojun     77: #include <sys/ansi.h>
1.56      kleink     78:
                     79: #ifndef sa_family_t
                     80: typedef __sa_family_t  sa_family_t;
1.58      kleink     81: #define sa_family_t    __sa_family_t
1.56      kleink     82: #endif
                     83:
1.55      itojun     84: #ifndef socklen_t
                     85: typedef __socklen_t    socklen_t;
1.58      kleink     86: #define socklen_t      __socklen_t
1.55      itojun     87: #endif
1.42      kleink     88:
1.63    ! kleink     89: #include <machine/ansi.h>
        !            90:
        !            91: #ifdef _BSD_SIZE_T_
        !            92: typedef        _BSD_SIZE_T_    size_t;
        !            93: #undef _BSD_SIZE_T_
        !            94: #endif
        !            95:
        !            96: #ifdef _BSD_SSIZE_T_
        !            97: typedef        _BSD_SSIZE_T_   ssize_t;
        !            98: #undef _BSD_SSIZE_T_
        !            99: #endif
        !           100:
        !           101: #include <sys/uio.h>
        !           102:
1.42      kleink    103: /*
                    104:  * Socket types.
1.1       cgd       105:  */
                    106: #define        SOCK_STREAM     1               /* stream socket */
                    107: #define        SOCK_DGRAM      2               /* datagram socket */
                    108: #define        SOCK_RAW        3               /* raw-protocol interface */
                    109: #define        SOCK_RDM        4               /* reliably-delivered message */
                    110: #define        SOCK_SEQPACKET  5               /* sequenced packet stream */
                    111:
                    112: /*
                    113:  * Option flags per-socket.
                    114:  */
                    115: #define        SO_DEBUG        0x0001          /* turn on debugging info recording */
                    116: #define        SO_ACCEPTCONN   0x0002          /* socket has had listen() */
                    117: #define        SO_REUSEADDR    0x0004          /* allow local address reuse */
                    118: #define        SO_KEEPALIVE    0x0008          /* keep connections alive */
                    119: #define        SO_DONTROUTE    0x0010          /* just use interface addresses */
                    120: #define        SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
                    121: #define        SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
                    122: #define        SO_LINGER       0x0080          /* linger on close if data present */
                    123: #define        SO_OOBINLINE    0x0100          /* leave received OOB data in line */
1.8       mycroft   124: #define        SO_REUSEPORT    0x0200          /* allow local address & port reuse */
1.18      thorpej   125: #define        SO_TIMESTAMP    0x0400          /* timestamp received dgram traffic */
1.1       cgd       126:
                    127: /*
                    128:  * Additional options, not kept in so_options.
                    129:  */
                    130: #define SO_SNDBUF      0x1001          /* send buffer size */
                    131: #define SO_RCVBUF      0x1002          /* receive buffer size */
                    132: #define SO_SNDLOWAT    0x1003          /* send low-water mark */
                    133: #define SO_RCVLOWAT    0x1004          /* receive low-water mark */
                    134: #define SO_SNDTIMEO    0x1005          /* send timeout */
                    135: #define SO_RCVTIMEO    0x1006          /* receive timeout */
                    136: #define        SO_ERROR        0x1007          /* get error status and clear */
                    137: #define        SO_TYPE         0x1008          /* get socket type */
                    138:
                    139: /*
                    140:  * Structure used for manipulating linger option.
                    141:  */
                    142: struct linger {
                    143:        int     l_onoff;                /* option on/off */
1.28      fvdl      144:        int     l_linger;               /* linger time in seconds */
1.1       cgd       145: };
                    146:
                    147: /*
                    148:  * Level number for (get/set)sockopt() to apply to socket itself.
                    149:  */
                    150: #define        SOL_SOCKET      0xffff          /* options for socket level */
                    151:
                    152: /*
                    153:  * Address families.
                    154:  */
                    155: #define        AF_UNSPEC       0               /* unspecified */
1.8       mycroft   156: #define        AF_LOCAL        1               /* local to host (pipes, portals) */
                    157: #define        AF_UNIX         AF_LOCAL        /* backward compatibility */
1.1       cgd       158: #define        AF_INET         2               /* internetwork: UDP, TCP, etc. */
                    159: #define        AF_IMPLINK      3               /* arpanet imp addresses */
                    160: #define        AF_PUP          4               /* pup protocols: e.g. BSP */
                    161: #define        AF_CHAOS        5               /* mit CHAOS protocols */
                    162: #define        AF_NS           6               /* XEROX NS protocols */
                    163: #define        AF_ISO          7               /* ISO protocols */
                    164: #define        AF_OSI          AF_ISO
                    165: #define        AF_ECMA         8               /* european computer manufacturers */
                    166: #define        AF_DATAKIT      9               /* datakit protocols */
                    167: #define        AF_CCITT        10              /* CCITT protocols, X.25 etc */
                    168: #define        AF_SNA          11              /* IBM SNA */
                    169: #define AF_DECnet      12              /* DECnet */
                    170: #define AF_DLI         13              /* DEC Direct data link interface */
                    171: #define AF_LAT         14              /* LAT */
                    172: #define        AF_HYLINK       15              /* NSC Hyperchannel */
                    173: #define        AF_APPLETALK    16              /* Apple Talk */
                    174: #define        AF_ROUTE        17              /* Internal Routing Protocol */
                    175: #define        AF_LINK         18              /* Link layer interface */
1.42      kleink    176: #if !defined(_XOPEN_SOURCE)
1.1       cgd       177: #define        pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */
1.42      kleink    178: #endif
1.8       mycroft   179: #define        AF_COIP         20              /* connection-oriented IP, aka ST II */
                    180: #define        AF_CNT          21              /* Computer Network Technology */
1.42      kleink    181: #if !defined(_XOPEN_SOURCE)
1.8       mycroft   182: #define pseudo_AF_RTIP 22              /* Help Identify RTIP packets */
1.42      kleink    183: #endif
1.8       mycroft   184: #define        AF_IPX          23              /* Novell Internet Protocol */
1.21      sommerfe  185: #define        AF_INET6        24              /* IP version 6 */
1.42      kleink    186: #if !defined(_XOPEN_SOURCE)
1.8       mycroft   187: #define pseudo_AF_PIP  25              /* Help Identify PIP packets */
1.42      kleink    188: #endif
1.17      chuck     189: #define AF_ISDN                26              /* Integrated Services Digital Network*/
                    190: #define AF_E164                AF_ISDN         /* CCITT E.164 recommendation */
                    191: #define AF_NATM                27              /* native ATM access */
1.19      is        192: #define AF_ARP         28              /* (rev.) addr. res. prot. (RFC 826) */
1.42      kleink    193: #if !defined(_XOPEN_SOURCE)
1.21      sommerfe  194: #define pseudo_AF_KEY  29              /* Internal key management protocol  */
1.31      thorpej   195: #define        pseudo_AF_HDRCMPLT 30           /* Used by BPF to not rewrite hdrs
                    196:                                           in interface output routine */
1.42      kleink    197: #endif
1.1       cgd       198:
1.31      thorpej   199: #define        AF_MAX          31
1.1       cgd       200:
                    201: /*
1.26      thorpej   202:  * Structure used by kernel to store most
                    203:  * addresses.
1.1       cgd       204:  */
                    205: struct sockaddr {
1.63    ! kleink    206:        __uint8_t       sa_len;         /* total length */
1.56      kleink    207:        sa_family_t     sa_family;      /* address family */
                    208:        char            sa_data[14];    /* actually longer; address value */
1.26      thorpej   209: };
1.1       cgd       210:
1.42      kleink    211: #if defined(_KERNEL)
1.1       cgd       212: /*
                    213:  * Structure used by kernel to pass protocol
                    214:  * information in raw sockets.
                    215:  */
                    216: struct sockproto {
                    217:        u_short sp_family;              /* address family */
                    218:        u_short sp_protocol;            /* protocol */
                    219: };
1.42      kleink    220: #endif /* _KERNEL */
1.1       cgd       221:
1.44      itojun    222: #if 1
                    223: /*
                    224:  * RFC 2553: protocol-independent placeholder for socket addresses
                    225:  */
                    226: #define _SS_MAXSIZE    128
1.63    ! kleink    227: #define _SS_ALIGNSIZE  (sizeof(__int64_t))
1.60      kleink    228: #define _SS_PAD1SIZE   (_SS_ALIGNSIZE - 2)
                    229: #define _SS_PAD2SIZE   (_SS_MAXSIZE - 2 - \
1.44      itojun    230:                                _SS_PAD1SIZE - _SS_ALIGNSIZE)
                    231:
1.46      kleink    232: #if !defined(_XOPEN_SOURCE) || (_XOPEN_SOURCE - 0) >= 500
1.44      itojun    233: struct sockaddr_storage {
1.63    ! kleink    234:        __uint8_t       ss_len;         /* address length */
1.56      kleink    235:        sa_family_t     ss_family;      /* address family */
                    236:        char            __ss_pad1[_SS_PAD1SIZE];
1.63    ! kleink    237:        __int64_t     __ss_align;/* force desired structure storage alignment */
1.56      kleink    238:        char            __ss_pad2[_SS_PAD2SIZE];
1.44      itojun    239: };
1.46      kleink    240: #endif /* !_XOPEN_SOURCE || ... */
                    241: #endif /* 1 */
1.44      itojun    242:
1.1       cgd       243: /*
                    244:  * Protocol families, same as address families for now.
                    245:  */
                    246: #define        PF_UNSPEC       AF_UNSPEC
1.8       mycroft   247: #define        PF_LOCAL        AF_LOCAL
                    248: #define        PF_UNIX         PF_LOCAL        /* backward compatibility */
1.1       cgd       249: #define        PF_INET         AF_INET
                    250: #define        PF_IMPLINK      AF_IMPLINK
                    251: #define        PF_PUP          AF_PUP
                    252: #define        PF_CHAOS        AF_CHAOS
                    253: #define        PF_NS           AF_NS
                    254: #define        PF_ISO          AF_ISO
                    255: #define        PF_OSI          AF_ISO
                    256: #define        PF_ECMA         AF_ECMA
                    257: #define        PF_DATAKIT      AF_DATAKIT
                    258: #define        PF_CCITT        AF_CCITT
                    259: #define        PF_SNA          AF_SNA
                    260: #define PF_DECnet      AF_DECnet
                    261: #define PF_DLI         AF_DLI
                    262: #define PF_LAT         AF_LAT
                    263: #define        PF_HYLINK       AF_HYLINK
                    264: #define        PF_APPLETALK    AF_APPLETALK
                    265: #define        PF_ROUTE        AF_ROUTE
                    266: #define        PF_LINK         AF_LINK
1.42      kleink    267: #if !defined(_XOPEN_SOURCE)
1.1       cgd       268: #define        PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */
1.42      kleink    269: #endif
1.8       mycroft   270: #define        PF_COIP         AF_COIP
                    271: #define        PF_CNT          AF_CNT
1.21      sommerfe  272: #define        PF_INET6        AF_INET6
1.8       mycroft   273: #define        PF_IPX          AF_IPX          /* same format as AF_NS */
1.42      kleink    274: #if !defined(_XOPEN_SOURCE)
1.8       mycroft   275: #define PF_RTIP                pseudo_AF_FTIP  /* same format as AF_INET */
                    276: #define PF_PIP         pseudo_AF_PIP
1.42      kleink    277: #endif
1.20      is        278: #define PF_ISDN                AF_ISDN         /* same as E164 */
                    279: #define PF_E164                AF_E164
1.17      chuck     280: #define PF_NATM                AF_NATM
1.19      is        281: #define PF_ARP         AF_ARP
1.42      kleink    282: #if !defined(_XOPEN_SOURCE)
1.21      sommerfe  283: #define PF_KEY                 pseudo_AF_KEY   /* like PF_ROUTE, only for key mgmt */
1.42      kleink    284: #endif
1.1       cgd       285:
                    286: #define        PF_MAX          AF_MAX
                    287:
1.42      kleink    288: #if !defined(_XOPEN_SOURCE)
1.63    ! kleink    289:
        !           290: #ifndef        gid_t
        !           291: typedef        __gid_t         gid_t;          /* group id */
        !           292: #define        gid_t           __gid_t
        !           293: #endif
        !           294:
        !           295: #ifndef        uid_t
        !           296: typedef        __uid_t         uid_t;          /* user id */
        !           297: #define        uid_t           __uid_t
        !           298: #endif
        !           299:
1.1       cgd       300: /*
1.27      thorpej   301:  * Socket credentials.
                    302:  */
                    303: struct sockcred {
                    304:        uid_t   sc_uid;                 /* real user id */
                    305:        uid_t   sc_euid;                /* effective user id */
                    306:        gid_t   sc_gid;                 /* real group id */
                    307:        gid_t   sc_egid;                /* effective group id */
                    308:        int     sc_ngroups;             /* number of supplemental groups */
                    309:        gid_t   sc_groups[1];           /* variable length */
                    310: };
                    311:
                    312: /*
                    313:  * Compute size of a sockcred structure with groups.
                    314:  */
                    315: #define        SOCKCREDSIZE(ngrps) \
                    316:        (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
1.42      kleink    317: #endif /* !_XOPEN_SOURCE */
1.27      thorpej   318:
1.38      kleink    319:
                    320: #if !defined(_XOPEN_SOURCE)
1.27      thorpej   321: /*
1.8       mycroft   322:  * Definitions for network related sysctl, CTL_NET.
                    323:  *
                    324:  * Second level is protocol family.
                    325:  * Third level is protocol number.
                    326:  *
                    327:  * Further levels are defined by the individual families below.
                    328:  */
                    329: #define NET_MAXID      AF_MAX
                    330:
                    331: #define CTL_NET_NAMES { \
                    332:        { 0, 0 }, \
1.28      fvdl      333:        { "local", CTLTYPE_NODE }, \
1.8       mycroft   334:        { "inet", CTLTYPE_NODE }, \
                    335:        { "implink", CTLTYPE_NODE }, \
                    336:        { "pup", CTLTYPE_NODE }, \
                    337:        { "chaos", CTLTYPE_NODE }, \
                    338:        { "xerox_ns", CTLTYPE_NODE }, \
                    339:        { "iso", CTLTYPE_NODE }, \
                    340:        { "emca", CTLTYPE_NODE }, \
                    341:        { "datakit", CTLTYPE_NODE }, \
                    342:        { "ccitt", CTLTYPE_NODE }, \
                    343:        { "ibm_sna", CTLTYPE_NODE }, \
                    344:        { "decnet", CTLTYPE_NODE }, \
                    345:        { "dec_dli", CTLTYPE_NODE }, \
                    346:        { "lat", CTLTYPE_NODE }, \
                    347:        { "hylink", CTLTYPE_NODE }, \
                    348:        { "appletalk", CTLTYPE_NODE }, \
                    349:        { "route", CTLTYPE_NODE }, \
                    350:        { "link_layer", CTLTYPE_NODE }, \
                    351:        { "xtp", CTLTYPE_NODE }, \
                    352:        { "coip", CTLTYPE_NODE }, \
                    353:        { "cnt", CTLTYPE_NODE }, \
                    354:        { "rtip", CTLTYPE_NODE }, \
                    355:        { "ipx", CTLTYPE_NODE }, \
1.21      sommerfe  356:        { "inet6", CTLTYPE_NODE }, \
1.8       mycroft   357:        { "pip", CTLTYPE_NODE }, \
1.20      is        358:        { "isdn", CTLTYPE_NODE }, \
1.17      chuck     359:        { "natm", CTLTYPE_NODE }, \
1.20      is        360:        { "arp", CTLTYPE_NODE }, \
1.21      sommerfe  361:        { "key", CTLTYPE_NODE }, \
1.8       mycroft   362: }
1.38      kleink    363: #endif /* !_XOPEN_SOURCE */
1.8       mycroft   364:
1.38      kleink    365: #if !defined(_XOPEN_SOURCE)
1.8       mycroft   366: /*
                    367:  * PF_ROUTE - Routing table
                    368:  *
                    369:  * Three additional levels are defined:
                    370:  *     Fourth: address family, 0 is wildcard
                    371:  *     Fifth: type of info, defined below
                    372:  *     Sixth: flag(s) to mask with for NET_RT_FLAGS
                    373:  */
                    374: #define NET_RT_DUMP    1               /* dump; may limit to a.f. */
                    375: #define NET_RT_FLAGS   2               /* by flags, e.g. RESOLVING */
1.47      bouyer    376: #define NET_RT_OIFLIST 3               /* old NET_RT_IFLIST (pre 1.5) */
                    377: #define NET_RT_IFLIST  4               /* survey interface list */
                    378: #define        NET_RT_MAXID    5
1.8       mycroft   379:
                    380: #define CTL_NET_RT_NAMES { \
                    381:        { 0, 0 }, \
                    382:        { "dump", CTLTYPE_STRUCT }, \
                    383:        { "flags", CTLTYPE_STRUCT }, \
1.47      bouyer    384:        { 0, 0 }, \
1.8       mycroft   385:        { "iflist", CTLTYPE_STRUCT }, \
                    386: }
1.38      kleink    387: #endif /* !_XOPEN_SOURCE */
1.8       mycroft   388:
                    389: /*
1.13      mycroft   390:  * Maximum queue length specifiable by listen(2).
1.1       cgd       391:  */
1.16      neil      392:
1.13      mycroft   393: #define        SOMAXCONN       128
1.16      neil      394:
1.1       cgd       395: /*
                    396:  * Message header for recvmsg and sendmsg calls.
                    397:  * Used value-result for recvmsg, value only for sendmsg.
                    398:  */
                    399: struct msghdr {
1.42      kleink    400:        void            *msg_name;      /* optional address */
                    401:        socklen_t       msg_namelen;    /* size of address */
                    402:        struct iovec    *msg_iov;       /* scatter/gather array */
                    403:        int             msg_iovlen;     /* # elements in msg_iov */
                    404:        void            *msg_control;   /* ancillary data, see below */
                    405:        socklen_t       msg_controllen; /* ancillary data buffer len */
                    406:        int             msg_flags;      /* flags on received message */
1.1       cgd       407: };
                    408:
                    409: #define        MSG_OOB         0x1             /* process out-of-band data */
                    410: #define        MSG_PEEK        0x2             /* peek at incoming message */
                    411: #define        MSG_DONTROUTE   0x4             /* send without using routing tables */
                    412: #define        MSG_EOR         0x8             /* data completes record */
                    413: #define        MSG_TRUNC       0x10            /* data discarded before delivery */
                    414: #define        MSG_CTRUNC      0x20            /* control data lost before delivery */
                    415: #define        MSG_WAITALL     0x40            /* wait for full request or error */
1.8       mycroft   416: #define        MSG_DONTWAIT    0x80            /* this message should be nonblocking */
1.30      matt      417: #define        MSG_BCAST       0x100           /* this message was rcvd using link-level brdcst */
                    418: #define        MSG_MCAST       0x200           /* this message was rcvd using link-level mcast */
1.1       cgd       419:
                    420: /*
                    421:  * Header for ancillary data objects in msg_control buffer.
                    422:  * Used for additional information with/about a datagram
                    423:  * not expressible by flags.  The format is a sequence
                    424:  * of message elements headed by cmsghdr structures.
                    425:  */
                    426: struct cmsghdr {
1.42      kleink    427:        socklen_t       cmsg_len;       /* data byte count, including hdr */
                    428:        int             cmsg_level;     /* originating protocol */
                    429:        int             cmsg_type;      /* protocol-specific type */
1.1       cgd       430: /* followed by u_char  cmsg_data[]; */
                    431: };
                    432:
1.8       mycroft   433: /* given pointer to struct cmsghdr, return pointer to data */
1.50      itojun    434: #define        CMSG_DATA(cmsg) \
1.57      christos  435:        ((u_char *)(void *)(cmsg) + __CMSG_ALIGN(sizeof(struct cmsghdr)))
1.1       cgd       436:
1.44      itojun    437: /*
                    438:  * Alignment requirement for CMSG struct manipulation.
1.51      itojun    439:  * This basically behaves the same as ALIGN() ARCH/include/param.h.
                    440:  * We declare it separately for two reasons:
                    441:  * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
                    442:  * idea of ALIGNBYTES at runtime.
                    443:  * without (2), we can't guarantee binary compatibility in case of future
                    444:  * changes in ALIGNBYTES.
1.44      itojun    445:  */
1.53      itojun    446: #define __CMSG_ALIGN(n)        (((n) + __cmsg_alignbytes()) & ~__cmsg_alignbytes())
                    447: #ifdef _KERNEL
1.54      augustss  448: #define CMSG_ALIGN(n)  __CMSG_ALIGN(n)
1.53      itojun    449: #endif
1.44      itojun    450:
1.8       mycroft   451: /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
1.1       cgd       452: #define        CMSG_NXTHDR(mhdr, cmsg) \
1.63    ! kleink    453:        (((__caddr_t)(cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len) + \
1.53      itojun    454:                            __CMSG_ALIGN(sizeof(struct cmsghdr)) > \
1.63    ! kleink    455:            (((__caddr_t)(mhdr)->msg_control) + (mhdr)->msg_controllen)) ? \
1.1       cgd       456:            (struct cmsghdr *)NULL : \
1.63    ! kleink    457:            (struct cmsghdr *)((__caddr_t)(cmsg) + \
        !           458:                __CMSG_ALIGN((cmsg)->cmsg_len)))
1.1       cgd       459:
1.62      itojun    460: /*
                    461:  * RFC 2292 requires to check msg_controllen, in case that the kernel returns
                    462:  * an empty list for some reasons.
                    463:  */
                    464: #define        CMSG_FIRSTHDR(mhdr) \
                    465:        ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
                    466:         (struct cmsghdr *)(mhdr)->msg_control : \
                    467:         (struct cmsghdr *)NULL)
1.1       cgd       468:
1.53      itojun    469: #define CMSG_SPACE(l)  (__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(l))
                    470: #define CMSG_LEN(l)    (__CMSG_ALIGN(sizeof(struct cmsghdr)) + (l))
1.44      itojun    471:
1.1       cgd       472: /* "Socket"-level control message types: */
                    473: #define        SCM_RIGHTS      0x01            /* access rights (array of int) */
1.42      kleink    474: #if !defined(_XOPEN_SOURCE)
1.18      thorpej   475: #define        SCM_TIMESTAMP   0x02            /* timestamp (struct timeval) */
1.42      kleink    476: #define        SCM_CREDS       0x04            /* credentials (struct sockcred) */
                    477: #endif
1.29      kleink    478:
                    479: /*
                    480:  * Types of socket shutdown(2).
                    481:  */
                    482: #define        SHUT_RD         0               /* Disallow further receives. */
                    483: #define        SHUT_WR         1               /* Disallow further sends. */
                    484: #define        SHUT_RDWR       2               /* Disallow further sends/receives. */
1.1       cgd       485:
1.42      kleink    486: #if !defined(_XOPEN_SOURCE)
1.1       cgd       487: /*
                    488:  * 4.3 compat sockaddr, move to compat file later
                    489:  */
                    490: struct osockaddr {
1.63    ! kleink    491:        __uint16_t      sa_family;      /* address family */
1.60      kleink    492:        char            sa_data[14];    /* up to 14 bytes of direct address */
1.1       cgd       493: };
                    494:
                    495: /*
                    496:  * 4.3-compat message header (move to compat file later).
                    497:  */
                    498: struct omsghdr {
1.63    ! kleink    499:        __caddr_t       msg_name;       /* optional address */
        !           500:        int             msg_namelen;    /* size of address */
        !           501:        struct iovec    *msg_iov;       /* scatter/gather array */
        !           502:        int             msg_iovlen;     /* # elements in msg_iov */
        !           503:        __caddr_t       msg_accrights;  /* access rights sent/received */
        !           504:        int             msg_accrightslen;
1.1       cgd       505: };
1.42      kleink    506: #endif
1.51      itojun    507:
1.59      toshii    508: #include <sys/cdefs.h>
                    509:
                    510: __BEGIN_DECLS
1.51      itojun    511: int    __cmsg_alignbytes __P((void));
1.59      toshii    512: __END_DECLS
1.1       cgd       513:
1.12      briggs    514: #ifndef        _KERNEL
1.1       cgd       515:
                    516: __BEGIN_DECLS
1.42      kleink    517: int    accept __P((int, struct sockaddr *, socklen_t *));
                    518: int    bind __P((int, const struct sockaddr *, socklen_t));
                    519: int    connect __P((int, const struct sockaddr *, socklen_t));
                    520: int    getpeername __P((int, struct sockaddr *, socklen_t *));
                    521: int    getsockname __P((int, struct sockaddr *, socklen_t *));
                    522: int    getsockopt __P((int, int, int, void *, socklen_t *));
1.1       cgd       523: int    listen __P((int, int));
1.8       mycroft   524: ssize_t        recv __P((int, void *, size_t, int));
1.42      kleink    525: ssize_t        recvfrom __P((int, void *, size_t, int, struct sockaddr *,
                    526:            socklen_t *));
1.8       mycroft   527: ssize_t        recvmsg __P((int, struct msghdr *, int));
                    528: ssize_t        send __P((int, const void *, size_t, int));
                    529: ssize_t        sendto __P((int, const void *,
1.42      kleink    530:            size_t, int, const struct sockaddr *, socklen_t));
1.8       mycroft   531: ssize_t        sendmsg __P((int, const struct msghdr *, int));
1.42      kleink    532: int    setsockopt __P((int, int, int, const void *, socklen_t));
1.1       cgd       533: int    shutdown __P((int, int));
                    534: int    socket __P((int, int, int));
                    535: int    socketpair __P((int, int, int, int *));
                    536: __END_DECLS
1.14      christos  537: #endif /* !_KERNEL */
1.1       cgd       538:
1.2       mycroft   539: #endif /* !_SYS_SOCKET_H_ */

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