package/siit/src/siit.h

   1 /*
   2  * siit.h -- definitions for the SIIT module
   3  *
   4  *
   5  */
   6
   7 /*
   8  * Constants
   9  */
  10
  11 /* SIIT_ETH control the name of SIIT interface:
  12  * 0 - interface name is siit0,
  13  * 1 - interface name is ethX.
  14  */
  15 #define SIIT_ETH 0
  16
  17 #define BUFF_SIZE 4096
  18 #define FRAG_BUFF_SIZE 1232     /* IPv6 max fragment size without IPv6 header
  19                                  * to fragmanet IPv4 if result IPv6 packet will be > 1280
  20                                  */
  21
  22 #define TRANSLATED_PREFIX 0x0000ffff /* third byte in IPv4-translated addr prefix */
  23 #define MAPPED_PREFIX 0x0000ffff     /* third byte in IPv4-mapped addr prefix */
  24
  25 #define IP4_IP6_HDR_DIFF 20     /* diffirence between IPv4 and IPv6 headers */
  26 #define IP6_FRAGMENT_SIZE 8     /* size of Fragment Header */
  27
  28 /* IPv6 header fields masks */
  29 #define IP6F_OFF_MASK       0xfff8  /* mask out offset from frag_off */
  30 #define IP6F_RESERVED_MASK  0x0006  /* reserved bits in frag_off */
  31 #define IP6F_MORE_FRAG      0x0001  /* more-fragments flag */
  32
  33
  34
  35 /*
  36  * Macros to help debugging
  37  */
  38
  39 #undef PDEBUG             /* undef it, just in case */
  40 #ifdef SIIT_DEBUG
  41 #  ifdef __KERNEL__
  42      /* This one if debugging is on, and kernel space */
  43 #    define PDEBUG(fmt, args...) printk(KERN_DEBUG "siit: " fmt, ## args)
  44 #  else
  45      /* This one for user space */
  46 #    define PDEBUG(fmt, args...) fprintf(stderr, fmt, ## args)
  47 #  endif
  48 #else
  49 #  define PDEBUG(fmt, args...) /* not debugging: nothing */
  50 #endif
  51
  52 #undef PDEBUGG
  53 #define PDEBUGG(fmt, args...)
  54
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