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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2010 Lawrence Stewart <lstewart@freebsd.org>
      * Copyright (c) 2010 The FreeBSD Foundation
      * All rights reserved.
      *
      * This software was developed by Lawrence Stewart while studying at the Centre
      * for Advanced Internet Architectures, Swinburne University of Technology, made
     * possible in part by grants from the FreeBSD Foundation and Cisco University
     * Research Program Fund at Community Foundation Silicon Valley.
     *
     * Portions of this software were developed at the Centre for Advanced
     * Internet Architectures, Swinburne University of Technology, Melbourne,
     * Australia by Lawrence Stewart under sponsorship from the FreeBSD Foundation.
     *
     * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    
    /*
     * A KPI for managing kernel helper modules which perform useful functionality
     * within the kernel. Originally released as part of the NewTCP research project
     * at Swinburne University of Technology's Centre for Advanced Internet
     * Architectures, Melbourne, Australia, which was made possible in part by a
     * grant from the Cisco University Research Program Fund at Community Foundation
     * Silicon Valley. More details are available at:
     *   http://caia.swin.edu.au/urp/newtcp/
     */
    
    #ifndef _SYS_KHELP_H_
    #define _SYS_KHELP_H_
    
    struct helper;
    struct hookinfo;
    struct osd;
    
    /* Helper classes. */
    #define HELPER_CLASS_TCP        0x00000001
    #define HELPER_CLASS_SOCKET     0x00000002
    
    /* Public KPI functions. */
    int     khelp_register_helper(struct helper *h);
    
    int     khelp_deregister_helper(struct helper *h);
    
    int     khelp_init_osd(uint32_t classes, struct osd *hosd);
    
    int     khelp_destroy_osd(struct osd *hosd);
    
    void *  khelp_get_osd(struct osd *hosd, int32_t id);
    
    int32_t khelp_get_id(char *hname);
    
    int     khelp_add_hhook(struct hookinfo *hki, uint32_t flags);
    
    int     khelp_remove_hhook(struct hookinfo *hki);
    
    #endif /* _SYS_KHELP_H_ */

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