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/netinet/ip_divert.h

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    1 /*-
    2  * Copyright (c) 2003 Sam Leffler, Errno Consulting
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer,
   10  *    without modification.
   11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
   12  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
   13  *    redistribution must be conditioned upon including a substantially
   14  *    similar Disclaimer requirement for further binary redistribution.
   15  * 3. Neither the names of the above-listed copyright holders nor the names
   16  *    of any contributors may be used to endorse or promote products derived
   17  *    from this software without specific prior written permission.
   18  *
   19  * NO WARRANTY
   20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   22  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
   23  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   24  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
   25  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   28  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGES.
   31  *
   32  * $FreeBSD: releng/5.4/sys/netinet/ip_divert.h 145335 2005-04-20 19:11:07Z cvs2svn $
   33  */
   34 
   35 #ifndef _NETINET_IP_DIVERT_H_
   36 #define _NETINET_IP_DIVERT_H_
   37 
   38 /*
   39  * Divert socket definitions.
   40  */
   41 
   42 struct divert_tag {
   43         u_int32_t       info;           /* port & flags */
   44         u_int16_t       cookie;         /* ipfw rule number */
   45 };
   46 
   47 /*
   48  * Return the divert cookie associated with the mbuf; if any.
   49  */
   50 static __inline u_int16_t
   51 divert_cookie(struct m_tag *mtag)
   52 {
   53         return ((struct divert_tag *)(mtag+1))->cookie;
   54 }
   55 static __inline u_int16_t
   56 divert_find_cookie(struct mbuf *m)
   57 {
   58         struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL);
   59         return mtag ? divert_cookie(mtag) : 0;
   60 }
   61 
   62 /*
   63  * Return the divert info associated with the mbuf; if any.
   64  */
   65 static __inline u_int32_t
   66 divert_info(struct m_tag *mtag)
   67 {
   68         return ((struct divert_tag *)(mtag+1))->info;
   69 }
   70 static __inline u_int32_t
   71 divert_find_info(struct mbuf *m)
   72 {
   73         struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL);
   74         return mtag ? divert_info(mtag) : 0;
   75 }
   76 
   77 extern  void div_init(void);
   78 extern  void div_input(struct mbuf *, int);
   79 extern  void div_ctlinput(int, struct sockaddr *, void *);
   80 extern  void divert_packet(struct mbuf *m, int incoming);
   81 extern  struct mbuf *divert_clone(struct mbuf *);
   82 extern struct pr_usrreqs div_usrreqs;
   83 #endif /* _NETINET_IP_DIVERT_H_ */

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