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/netinet6/ah.h

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    1 /*      $NetBSD: ah.h,v 1.21 2003/08/05 12:20:35 itojun Exp $   */
    2 /*      $KAME: ah.h,v 1.16 2001/09/04 08:43:19 itojun Exp $     */
    3 
    4 /*
    5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. Neither the name of the project nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 /*
   34  * RFC1826/2402 authentication header.
   35  */
   36 
   37 #ifndef _NETINET6_AH_H_
   38 #define _NETINET6_AH_H_
   39 
   40 #if defined(_KERNEL_OPT)
   41 #include "opt_inet.h"
   42 #endif
   43 
   44 struct ah {
   45         u_int8_t        ah_nxt;         /* Next Header */
   46         u_int8_t        ah_len;         /* Length of data, in 32bit */
   47         u_int16_t       ah_reserve;     /* Reserved for future use */
   48         u_int32_t       ah_spi;         /* Security parameter index */
   49         /* variable size, 32bit bound*/ /* Authentication data */
   50 };
   51 
   52 struct newah {
   53         u_int8_t        ah_nxt;         /* Next Header */
   54         u_int8_t        ah_len;         /* Length of data + 1, in 32bit */
   55         u_int16_t       ah_reserve;     /* Reserved for future use */
   56         u_int32_t       ah_spi;         /* Security parameter index */
   57         u_int32_t       ah_seq;         /* Sequence number field */
   58         /* variable size, 32bit bound*/ /* Authentication data */
   59 };
   60 
   61 #ifdef _KERNEL
   62 struct secasvar;
   63 
   64 struct ah_algorithm_state {
   65         struct secasvar *sav;
   66         void* foo;      /* per algorithm data - maybe */
   67 };
   68 
   69 struct ah_algorithm {
   70         int (*sumsiz) __P((struct secasvar *));
   71         int (*mature) __P((struct secasvar *));
   72         int keymin;     /* in bits */
   73         int keymax;     /* in bits */
   74         const char *name;
   75         int (*init) __P((struct ah_algorithm_state *, struct secasvar *));
   76         void (*update) __P((struct ah_algorithm_state *, u_int8_t *, size_t));
   77         void (*result) __P((struct ah_algorithm_state *, u_int8_t *, size_t));
   78 };
   79 
   80 #define AH_MAXSUMSIZE   (512 / 8)
   81 
   82 extern const struct ah_algorithm *ah_algorithm_lookup __P((int));
   83 
   84 /* cksum routines */
   85 extern int ah_hdrlen __P((struct secasvar *));
   86 
   87 extern size_t ah_hdrsiz __P((struct ipsecrequest *));
   88 extern void ah4_input __P((struct mbuf *, ...));
   89 extern int ah4_output __P((struct mbuf *, struct ipsecrequest *));
   90 extern int ah4_calccksum __P((struct mbuf *, u_int8_t *, size_t,
   91         const struct ah_algorithm *, struct secasvar *));
   92 
   93 extern void *ah4_ctlinput __P((int, struct sockaddr *, void *));
   94 
   95 #ifdef INET6
   96 extern int ah6_input __P((struct mbuf **, int *, int));
   97 extern int ah6_output __P((struct mbuf *, u_char *, struct mbuf *,
   98         struct ipsecrequest *));
   99 extern int ah6_calccksum __P((struct mbuf *, u_int8_t *, size_t,
  100         const struct ah_algorithm *, struct secasvar *));
  101 
  102 extern void ah6_ctlinput __P((int, struct sockaddr *, void *));
  103 #endif /* INET6 */
  104 
  105 #endif /* _KERNEL */
  106 
  107 #endif /* _NETINET6_AH_H_ */

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