The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2010 Lawrence Stewart <lstewart@freebsd.org>
    5  * Copyright (c) 2010 The FreeBSD Foundation
    6  * All rights reserved.
    7  *
    8  * This software was developed by Lawrence Stewart while studying at the Centre
    9  * for Advanced Internet Architectures, Swinburne University of Technology, made
   10  * possible in part by grants from the FreeBSD Foundation and Cisco University
   11  * Research Program Fund at Community Foundation Silicon Valley.
   12  *
   13  * Portions of this software were developed at the Centre for Advanced
   14  * Internet Architectures, Swinburne University of Technology, Melbourne,
   15  * Australia by Lawrence Stewart under sponsorship from the FreeBSD Foundation.
   16  *
   17  * Redistribution and use in source and binary forms, with or without
   18  * modification, are permitted provided that the following conditions
   19  * are met:
   20  * 1. Redistributions of source code must retain the above copyright
   21  *    notice, this list of conditions and the following disclaimer.
   22  * 2. Redistributions in binary form must reproduce the above copyright
   23  *    notice, this list of conditions and the following disclaimer in the
   24  *    documentation and/or other materials provided with the distribution.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   29  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   36  * SUCH DAMAGE.
   37  *
   38  * $FreeBSD: stable/12/sys/sys/khelp.h 326256 2017-11-27 15:01:59Z pfg $
   39  */
   40 
   41 /*
   42  * A KPI for managing kernel helper modules which perform useful functionality
   43  * within the kernel. Originally released as part of the NewTCP research project
   44  * at Swinburne University of Technology's Centre for Advanced Internet
   45  * Architectures, Melbourne, Australia, which was made possible in part by a
   46  * grant from the Cisco University Research Program Fund at Community Foundation
   47  * Silicon Valley. More details are available at:
   48  *   http://caia.swin.edu.au/urp/newtcp/
   49  */
   50 
   51 #ifndef _SYS_KHELP_H_
   52 #define _SYS_KHELP_H_
   53 
   54 struct helper;
   55 struct hookinfo;
   56 struct osd;
   57 
   58 /* Helper classes. */
   59 #define HELPER_CLASS_TCP        0x00000001
   60 #define HELPER_CLASS_SOCKET     0x00000002
   61 
   62 /* Public KPI functions. */
   63 int     khelp_register_helper(struct helper *h);
   64 
   65 int     khelp_deregister_helper(struct helper *h);
   66 
   67 int     khelp_init_osd(uint32_t classes, struct osd *hosd);
   68 
   69 int     khelp_destroy_osd(struct osd *hosd);
   70 
   71 void *  khelp_get_osd(struct osd *hosd, int32_t id);
   72 
   73 int32_t khelp_get_id(char *hname);
   74 
   75 int     khelp_add_hhook(struct hookinfo *hki, uint32_t flags);
   76 
   77 int     khelp_remove_hhook(struct hookinfo *hki);
   78 
   79 #endif /* _SYS_KHELP_H_ */

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