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

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1982, 1986, 1990, 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.
     *
     *      @(#)socketvar.h 8.3 (Berkeley) 2/19/95
     *
     * $FreeBSD: releng/12.0/sys/sys/sockopt.h 336692 2018-07-25 00:18:21Z emaste $
     */
    #ifndef _SYS_SOCKOPT_H_
    #define _SYS_SOCKOPT_H_
    
    #ifndef _KERNEL
    #error "no user-serviceable parts inside"
    #endif
    
    
    struct thread;
    struct socket;
    
    /*
     * Argument structure for sosetopt et seq.  This is in the KERNEL
     * section because it will never be visible to user code.
     */
    enum sopt_dir { SOPT_GET, SOPT_SET };
    
    struct  sockopt {
            enum    sopt_dir sopt_dir; /* is this a get or a set? */
            int     sopt_level;     /* second arg of [gs]etsockopt */
            int     sopt_name;      /* third arg of [gs]etsockopt */
            void   *sopt_val;       /* fourth arg of [gs]etsockopt */
            size_t  sopt_valsize;   /* (almost) fifth arg of [gs]etsockopt */
            struct  thread *sopt_td; /* calling thread or null if kernel */
    };
    
    int     sosetopt(struct socket *so, struct sockopt *sopt);
    int     sogetopt(struct socket *so, struct sockopt *sopt);
    int     sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen);
    int     sooptcopyout(struct sockopt *sopt, const void *buf, size_t len);
    int     soopt_getm(struct sockopt *sopt, struct mbuf **mp);
    int     soopt_mcopyin(struct sockopt *sopt, struct mbuf *m);
    int     soopt_mcopyout(struct sockopt *sopt, struct mbuf *m);
    int     accept_filt_getopt(struct socket *, struct sockopt *);
    int     accept_filt_setopt(struct socket *, struct sockopt *);
    int     so_setsockopt(struct socket *so, int level, int optname,
                void *optval, size_t optlen);
    
    #endif /* _SYS_SOCKOPT_H_ */

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