bsd/netinet/ip_divert.h

   1 /*
   2  * Copyright (c) 2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*-
  30  * Copyright (c) 2003 Sam Leffler, Errno Consulting
  31  * All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer,
  38  *    without modification.
  39  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  40  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
  41  *    redistribution must be conditioned upon including a substantially
  42  *    similar Disclaimer requirement for further binary redistribution.
  43  * 3. Neither the names of the above-listed copyright holders nor the names
  44  *    of any contributors may be used to endorse or promote products derived
  45  *    from this software without specific prior written permission.
  46  *
  47  * NO WARRANTY
  48  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  49  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  50  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
  51  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  52  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
  53  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  54  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  55  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  56  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  57  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  58  * THE POSSIBILITY OF SUCH DAMAGES.
  59  *
  60  * $FreeBSD: src/sys/netinet/ip_divert.h,v 1.3 2004/02/25 19:55:28 mlaier Exp $
  61  */
  62
  63 #ifndef _NETINET_IP_DIVERT_H_
  64 #define _NETINET_IP_DIVERT_H_
  65
  66 #if IPDIVERT
  67 /*
  68  * Divert socket definitions.
  69  */
  70
  71 /* 32-bit unique unsigned value used to identify a module */
  72
  73 struct divert_tag {
  74         u_int32_t       info;           /* port & flags */
  75         u_int16_t       cookie;         /* ipfw rule number */
  76 };
  77
  78 /*
  79  * Return the divert cookie associated with the mbuf; if any.
  80  */
  81 static __inline u_int16_t
  82 divert_cookie(struct m_tag *mtag)
  83 {
  84         return ((struct divert_tag *)(mtag+1))->cookie;
  85 }
  86 static __inline u_int16_t
  87 divert_find_cookie(struct mbuf *m)
  88 {
  89         struct m_tag *mtag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
  90                                                                           KERNEL_TAG_TYPE_DIVERT, NULL);
  91         return mtag ? divert_cookie(mtag) : 0;
  92 }
  93
  94 /*
  95  * Return the divert info associated with the mbuf; if any.
  96  */
  97 static __inline u_int32_t
  98 divert_info(struct m_tag *mtag)
  99 {
 100         return ((struct divert_tag *)(mtag+1))->info;
 101 }
 102 static __inline u_int32_t
 103 divert_find_info(struct mbuf *m)
 104 {
 105         struct m_tag *mtag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
 106                                                                           KERNEL_TAG_TYPE_DIVERT, NULL);
 107         return mtag ? divert_info(mtag) : 0;
 108 }
 109
 110 extern  void div_init(void) __attribute__((section("__TEXT, initcode")));
 111 extern  void div_input(struct mbuf *, int);
 112 lck_mtx_t *
 113         div_getlock(struct socket *,  int );
 114 int     div_unlock(struct socket *, int, void *);
 115 int     div_lock(struct socket *, int , void *);
 116 extern  void divert_packet(struct mbuf *m, int incoming, int port, int rule);
 117 extern struct pr_usrreqs div_usrreqs;
 118
 119 #endif /* IPDIVERT */
 120 #endif /* _NETINET_IP_DIVERT_H_ */