mdw@git.distorted.org.uk Git - secnet/blob - magic.h

   1 /* Magic numbers used within secnet */
   2 /*
   3  * This file is part of secnet.
   4  * See README for full list of copyright holders.
   5  *
   6  * secnet is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * secnet is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 3 along with secnet; if not, see
  18  * https://www.gnu.org/licenses/gpl.html.
  19  */
  20
  21 #ifndef magic_h
  22 #define magic_h
  23
  24 #define LABEL_NAK     0x00000000
  25 #define LABEL_MSG0    0x00020200
  26 #define LABEL_MSG1    0x01010101
  27 #define LABEL_MSG2    0x02020202
  28 #define LABEL_MSG3    0x03030303
  29 #define LABEL_MSG3BIS 0x13030313
  30 #define LABEL_MSG4    0x04040404
  31 #define LABEL_MSG5    0x05050505
  32 #define LABEL_MSG6    0x06060606
  33 #define LABEL_MSG7    0x07070707
  34 #define LABEL_MSG8    0x08080808
  35 #define LABEL_MSG9    0x09090909
  36 #define LABEL_PROD    0x0a0a0a0a
  37
  38 /* uses of the 32-bit capability bitmap */
  39 #define CAPAB_EARLY           CAPAB_PRIORITY_MOBILE
  40 #define CAPAB_TRANSFORM_MASK  0x0000ffff
  41 #define CAPAB_PRIORITY_MOBILE 0x80000000 /* mobile site has MSG1 priority */
  42 /* remaining bits are unused */
  43
  44 /*
  45  * The transform capability mask is a set of bits, one for each
  46  * transform supported.  The transform capability numbers are set in
  47  * the configuration (and should correspond between the two sites),
  48  * although there are sensible defaults.
  49  *
  50  * Advertising a nonzero transform capability mask promises that
  51  * the receiver understands LABEL_MSG3BIS messages, which
  52  * contain an additional byte specifying the transform capability
  53  * number actually chosen by the MSG3 sender.
  54  *
  55  * Aside from that, an empty bitmask is treated the same as
  56  *  1u<<CAPAB_TRANSFORMNUM_ANCIENT
  57  */
  58
  59 /* bit indices, 0 is ls bit */
  60 #define CAPAB_TRANSFORMNUM_USER_MIN              0
  61 #define CAPAB_TRANSFORMNUM_USER_MAX              7
  62 #define CAPAB_TRANSFORMNUM_SERPENT256CBC         8
  63 #define CAPAB_TRANSFORMNUM_EAXSERPENT            9
  64 #define CAPAB_TRANSFORMNUM_MAX                  15
  65
  66 #define CAPAB_TRANSFORMNUM_ANCIENT CAPAB_TRANSFORMNUM_SERPENT256CBC
  67
  68 #endif /* magic_h */