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/6.1/sys/netinet/ip_divert.h 136714 2004-10-19 21:14:57Z andre $
   33  */
   34 
   35 #ifndef _NETINET_IP_DIVERT_H_
   36 #define _NETINET_IP_DIVERT_H_
   37 
   38 /*
   39  * Sysctl declaration.
   40  */
   41 #ifdef SYSCTL_DECL
   42 SYSCTL_DECL(_net_inet_divert);
   43 #endif
   44 
   45 /*
   46  * Divert socket definitions.
   47  */
   48 struct divert_tag {
   49         u_int32_t       info;           /* port & flags */
   50         u_int16_t       cookie;         /* ipfw rule number */
   51 };
   52 
   53 /*
   54  * Return the divert cookie associated with the mbuf; if any.
   55  */
   56 static __inline u_int16_t
   57 divert_cookie(struct m_tag *mtag)
   58 {
   59         return ((struct divert_tag *)(mtag+1))->cookie;
   60 }
   61 static __inline u_int16_t
   62 divert_find_cookie(struct mbuf *m)
   63 {
   64         struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL);
   65         return mtag ? divert_cookie(mtag) : 0;
   66 }
   67 
   68 /*
   69  * Return the divert info associated with the mbuf; if any.
   70  */
   71 static __inline u_int32_t
   72 divert_info(struct m_tag *mtag)
   73 {
   74         return ((struct divert_tag *)(mtag+1))->info;
   75 }
   76 static __inline u_int32_t
   77 divert_find_info(struct mbuf *m)
   78 {
   79         struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL);
   80         return mtag ? divert_info(mtag) : 0;
   81 }
   82 
   83 typedef void ip_divert_packet_t(struct mbuf *m, int incoming);
   84 extern  ip_divert_packet_t *ip_divert_ptr;
   85 
   86 extern  void div_init(void);
   87 extern  void div_input(struct mbuf *, int);
   88 extern  void div_ctlinput(int, struct sockaddr *, void *);
   89 #endif /* _NETINET_IP_DIVERT_H_ */

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