FreeBSD/Linux Kernel Cross Reference
sys/sys/un.h

     /*      $NetBSD: un.h,v 1.44.4.1 2009/03/18 05:33:23 snj Exp $  */
     
     /*
      * Copyright (c) 1982, 1986, 1993
      *      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.
     * 3. 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.
     *
     *      @(#)un.h        8.3 (Berkeley) 2/19/95
     */
    
    #ifndef _SYS_UN_H_
    #define _SYS_UN_H_
    
    #include <sys/ansi.h>
    #include <sys/featuretest.h>
    #include <sys/types.h>
    
    #ifndef sa_family_t
    typedef __sa_family_t   sa_family_t;
    #define sa_family_t     __sa_family_t
    #endif
    
    /*
     * Definitions for UNIX IPC domain.
     */
    struct  sockaddr_un {
            uint8_t         sun_len;        /* total sockaddr length */
            sa_family_t     sun_family;     /* AF_LOCAL */
            char            sun_path[104];  /* path name (gag) */
    };
    
    /*
     * Socket options for UNIX IPC domain.
     */
    #if defined(_NETBSD_SOURCE)
    #define LOCAL_CREDS     0x0001          /* pass credentials to receiver */
    #define LOCAL_CONNWAIT  0x0002          /* connects block until accepted */
    #define LOCAL_PEEREID   0x0003          /* get peer identification */
    #endif
    
    /*
     * Data automatically stored inside connect() for use by LOCAL_PEEREID
     */
    struct unpcbid {
            pid_t unp_pid;          /* process id */
            uid_t unp_euid;         /* effective user id */
            gid_t unp_egid;         /* effective group id */
    };
    
    #ifdef _KERNEL
    struct unpcb;
    struct socket;
    struct sockopt;
    
    int     uipc_usrreq(struct socket *, int, struct mbuf *,
                struct mbuf *, struct mbuf *, struct lwp *);
    int     uipc_ctloutput(int, struct socket *, struct sockopt *);
    void    uipc_init (void);
    kmutex_t *uipc_dgramlock (void);
    kmutex_t *uipc_streamlock (void);
    kmutex_t *uipc_rawlock (void);
    
    int     unp_attach (struct socket *);
    int     unp_bind (struct socket *, struct mbuf *, struct lwp *);
    int     unp_connect (struct socket *, struct mbuf *, struct lwp *);
    int     unp_connect2 (struct socket *, struct socket *, int);
    void    unp_detach (struct unpcb *);
    void    unp_discard (struct file *);
    void    unp_disconnect (struct unpcb *);
    bool    unp_drop (struct unpcb *, int);
    void    unp_shutdown (struct unpcb *);
    int     unp_externalize (struct mbuf *, struct lwp *);
    int     unp_internalize (struct mbuf **);
    void    unp_dispose (struct mbuf *);
    int     unp_output (struct mbuf *, struct mbuf *, struct unpcb *,
                struct lwp *);
   void    unp_setaddr (struct socket *, struct mbuf *, bool);
   #else /* !_KERNEL */
   
   /* actual length of an initialized sockaddr_un */
   #if defined(_NETBSD_SOURCE)
   #define SUN_LEN(su) \
           (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
   #endif /* !_NetBSD_SOURCE */
   #endif /* _KERNEL */
   
   #endif /* !_SYS_UN_H_ */

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