bsd/netinet/ip_divert.h

   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: src/sys/netinet/ip_divert.h,v 1.3 2004/02/25 19:55:28 mlaier Exp $
  33  */
  34
  35 #ifndef _NETINET_IP_DIVERT_H_
  36 #define _NETINET_IP_DIVERT_H_
  37
  38 #if IPDIVERT
  39 /*
  40  * Divert socket definitions.
  41  */
  42
  43 /* 32-bit unique unsigned value used to identify a module */
  44
  45 struct divert_tag {
  46         u_int32_t       info;           /* port & flags */
  47         u_int16_t       cookie;         /* ipfw rule number */
  48 };
  49
  50 /*
  51  * Return the divert cookie associated with the mbuf; if any.
  52  */
  53 static __inline u_int16_t
  54 divert_cookie(struct m_tag *mtag)
  55 {
  56         return ((struct divert_tag *)(mtag+1))->cookie;
  57 }
  58 static __inline u_int16_t
  59 divert_find_cookie(struct mbuf *m)
  60 {
  61         struct m_tag *mtag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
  62                                                                           KERNEL_TAG_TYPE_DIVERT, NULL);
  63         return mtag ? divert_cookie(mtag) : 0;
  64 }
  65
  66 /*
  67  * Return the divert info associated with the mbuf; if any.
  68  */
  69 static __inline u_int32_t
  70 divert_info(struct m_tag *mtag)
  71 {
  72         return ((struct divert_tag *)(mtag+1))->info;
  73 }
  74 static __inline u_int32_t
  75 divert_find_info(struct mbuf *m)
  76 {
  77         struct m_tag *mtag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
  78                                                                           KERNEL_TAG_TYPE_DIVERT, NULL);
  79         return mtag ? divert_info(mtag) : 0;
  80 }
  81
  82 extern  void div_init(void) __attribute__((section("__TEXT, initcode")));
  83 extern  void div_input(struct mbuf *, int);
  84 lck_mtx_t *
  85         div_getlock(struct socket *,  int );
  86 int     div_unlock(struct socket *, int, int);
  87 int     div_lock(struct socket *, int , int );
  88 extern  void divert_packet(struct mbuf *m, int incoming, int port, int rule);
  89 extern struct pr_usrreqs div_usrreqs;
  90
  91 #endif /* IPDIVERT */
  92 #endif /* _NETINET_IP_DIVERT_H_ */