sys/netproto/mpls/mpls.h

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *    the documentation and/or other materials provided with the
  13  *    distribution.
  14  * 3. Neither the name of The DragonFly Project nor the names of its
  15  *    contributors may be used to endorse or promote products derived
  16  *    from this software without specific, prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  21  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  22  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  28  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $DragonFly: src/sys/netproto/mpls/mpls.h,v 1.2 2008/07/07 23:11:54 nant Exp $
  32  */
  33
  34 #ifndef _NETMPLS_MPLS_H_
  35 #define _NETMPLS_MPLS_H_
  36
  37 #include <arpa/inet.h>
  38
  39 #include <sys/types.h>
  40
  41 typedef u_int32_t       mpls_label_t;
  42 typedef u_int8_t        mpls_exp_t;
  43 typedef u_int8_t        mpls_s_t;
  44 typedef u_int8_t        mpls_ttl_t;
  45
  46 struct mpls {
  47         u_int32_t       mpls_shim;
  48 };
  49 #define MPLS_LABEL_MASK         0xfffff000
  50 #define MPLS_EXP_MASK           0x00000e00
  51 #define MPLS_STACK_MASK         0x00000100
  52 #define MPLS_TTL_MASK           0x000000ff
  53 #define MPLS_LABEL(shim)        (((shim) & MPLS_LABEL_MASK) >> 12)
  54 #define MPLS_EXP(shim)          (((shim) & MPLS_EXP_MASK) >> 9)
  55 #define MPLS_STACK(shim)        (((shim) & MPLS_STACK_MASK) >> 8)
  56 #define MPLS_TTL(shim)          ((shim) & MPLS_TTL_MASK)
  57 #define MPLS_SET_LABEL(shim, x)                                 \
  58                 do {                                            \
  59                         shim &= ~MPLS_LABEL_MASK;               \
  60                         shim |= ((x) << 12) & MPLS_LABEL_MASK;  \
  61                 } while(0)
  62 #define MPLS_SET_EXP(shim, x)                                   \
  63                 do {                                            \
  64                         shim &= ~MPLS_EXP_MASK;                 \
  65                         shim |= ((x) << 9) & MPLS_EXP_MASK;     \
  66                 } while(0)
  67 #define MPLS_SET_STACK(shim, x)                                 \
  68                 do {                                            \
  69                         shim &= ~MPLS_STACK_MASK;                       \
  70                         shim |= ((x) << 8) & MPLS_STACK_MASK;   \
  71                 } while(0)
  72 #define MPLS_SET_TTL(shim, x)                                   \
  73                 do {                                            \
  74                         shim &= ~MPLS_TTL_MASK;                 \
  75                         shim |= (x) & MPLS_TTL_MASK;            \
  76                 } while(0)
  77
  78 struct  mpls_addr {
  79         mpls_label_t    ma_label;
  80 };
  81
  82 struct  sockaddr_mpls {
  83         u_int8_t                smpls_len;
  84         u_int8_t                smpls_family;
  85         u_int8_t                smpls_op;       /* label op. push, pop, swap */
  86         mpls_exp_t              smpls_exp;
  87         struct mpls_addr        smpls_addr;
  88 };
  89 #define smpls_label     smpls_addr.ma_label
  90
  91 #define MPLSLOP_PUSH    1
  92 #define MPLSLOP_POP     2
  93 #define MPLSLOP_SWAP    3
  94 #define MPLSLOP_POPALL  4
  95
  96 #define MPLS_MAXLOPS    3
  97
  98 /*
  99  * Definitions for mpls sysctl operations.
 100  */
 101 #define CTL_MPLSPROTO_NAMES {           \
 102         { "mpls", CTLTYPE_NODE },       \
 103         {0, 0}                          \
 104 }
 105
 106 /*
 107  * Names for MPLS sysctl objects.
 108  */
 109 #define MPLSCTL_FORWARDING      1
 110
 111 #endif /* _NETMPLS_MPLS_H_ */
 112