scope6_var.h

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    1 /*      $FreeBSD: src/sys/netinet6/scope6_var.h,v 1.4 2005/01/07 02:30:35 imp Exp $     */
    2 /*      $KAME: scope6_var.h,v 1.4 2000/05/18 15:03:27 jinmei Exp $      */
    3 
    4 /*-
    5  * Copyright (C) 2000 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 #ifndef _NETINET6_SCOPE6_VAR_H_
   34 #define _NETINET6_SCOPE6_VAR_H_
   35 
   36 #ifdef _KERNEL
   37 
   38 /*
   39  * IPv6 Core Protocols Implementation
   40  * By Qing Li, Tatuya Jinmei, Keiichi Shima
   41  *
   42  * Some information from Chapter 2.9 (Handling Scope Zones) Figure 2.12, p.56
   43  *
   44  * User Space
   45  *
   46  *             Normal App         Statistics/Mgmt App        Routing App
   47  *          /---------------\    /-------------------\   /------------------\
   48  *          | sin6_scope_id |    |   embedded form   |   |  embedded form   |
   49  *          |      only     |    | (+ sin6_scope_id) |   | or sin6_scope_id |
   50  *          \---------------/    \-------------------/   \------------------/
   51  *                  ^                      ^                ^          |
   52  *                  |                      |                |          |
   53  *            no conversion              parse            parse      embed
   54  *                  |                   embedded        embbeded      ID
   55  *                  |                      ID              ID    (if necessary)
   56  *                  |                      |                |          |
   57  *                  v                      |                |          v
   58  *          /---------------\    /-------------------\   /------------------\
   59  * ------   |    AF_INET6   |    |        kvm        |   |     Routing      |
   60  * Kernel   |     socket    |    |     interface     |   |     socket       |
   61  *          \---------------/    \-------------------/   \------------------/
   62  *             ^       |                  ^                        ^
   63  *             |       |                  |                        |
   64  *           clear   embed           no conversion                 |
   65  *          embedded  ID                  |                   no conversion
   66  *            ID       |  ----------------------------------       |
   67  *             |       V  |                                |       v
   68  *          /---------------\                            /--------------------\
   69  *          |               |---- clear sin_scope_id --->| embedded form only |
   70  *          |               |<---  set sin_scope_id  ----|                    |
   71  *          |               |                            \--------------------/
   72  *          | embedded form |                                      ^
   73  *          |       +       |                                      |
   74  *          | sin_scope_id  |                                no conversion
   75  *          |               |                                      |
   76  *          |               |                                      V
   77  *          |               |                            /--------------------\
   78  *          |               |---- clear sin_scope_id --->| embedded form only |
   79  *          |               |<---  set sin_scope_id  ----|                    |
   80  *          \---------------/                            \--------------------/
   81  * --------   ^           |
   82  * Physical   |         clear 
   83  * Network  embed ID,  embedded
   84  *           set         ID
   85  *        sin_scope_id    |
   86  *            |           v
   87  *          /---------------\
   88  *          | 128-bit IPv6  |
   89  *          | address       |
   90  *          | (ID not       |
   91  *          |  included)    |
   92  *          \---------------/
   93  */
   94 
   95 
   96 struct scope6_id {
   97         /*
   98          * 16 is correspondent to 4bit multicast scope field.
   99          * i.e. from interface-local to global with some
  100          * reserved/unassigned types.
  101          */
  102         uint32_t s6id_list[16];
  103 };
  104 
  105 void    scope6_init(void);
  106 struct scope6_id *scope6_ifattach(struct ifnet *);
  107 void    scope6_ifdetach(struct scope6_id *);
  108 uint32_t scope6_in6_addrscope(struct in6_addr *);
  109 uint32_t scope6_addr2default(const struct in6_addr *);
  110 int     sa6_embedscope(struct sockaddr_in6 *, int);
  111 int     sa6_recoverscope(struct sockaddr_in6 *);
  112 int     in6_setzoneid(struct in6_addr *, uint32_t);
  113 int     in6_setscope(struct in6_addr *, const struct ifnet *, u_int32_t *);
  114 int     in6_clearscope(struct in6_addr *);
  115 const char *in6_getscopename(const struct in6_addr *);
  116 #endif /* _KERNEL */
  117 
  118 #endif /* _NETINET6_SCOPE6_VAR_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/netinet6/scope6_var.h

FreeBSD/Linux Kernel Cross Reference
sys/netinet6/scope6_var.h