text: 
  
  #ifndef _alta_enet_h_
  #define _alta_enet_h_
  
  #include <stdint.h>
  
  /**
   * Alta APMP packet header.  Data will all be big endian.
   */
  typedef struct
  {
    uint32_t	mode;		// Should always be 1 for APMP mode.
    uint32_t	seqNum;
    uint32_t	status;		// Value of zero is success.
    uint32_t	alta;		// Fixed string "ALTA" - 0x414C5441
    uint32_t	reserved1;
    uint32_t	reserved2;
    uint32_t	reserved3;
    uint32_t	payloadSize;	// in bytes; 4-1376
  
  // These are not really part of the header, but are standard first part of the
  // payload for the APMP UDP feed
    uint32_t	PEtimeHigh;
    uint32_t	PEtimeLow;
    uint32_t	IRIGtimeHigh;
    uint32_t	IRIGtimeLow;
  } APMP_hdr;
  
  
  // Alta receive packet for each arinc word.
  typedef struct
  {
    uint32_t	control;	// 0x80000000 is error bit (0=ok, 1=err)
    uint32_t	timeHigh;
    uint32_t	timeLow;
    uint32_t	data;
  } rxp;
  
  
  #endif
  