/* GTUdpReceiver.h */

/*
   Basic packet info. Datagrams are SEG_SIZE long and the first 32-bit word
   contains a sequence number.  UDP guarentees datagrams are received 
   intact or not at all and the sequence number is therefore sufficient for
   checking. SEG_SIZE must be less than or equal to max datagram size

   Events are of variable length and therefore EVT_LEN is deprecated. The 
   first word of the buffer following the sequence number will be the SEP 
   word.  The next SEP will be the beginning of the next event.  The actual
   event length (including SEP) is the address of the second SEP minus the 
   address of the first SEP. The number of events in the datagram is 
   BUF_SIZE / <event length> and the number of unused bytes at the end of the
   packet is BUF_SIZE % <event length>.

   Events are in the raw data format from the digitizers, in big-endian
   (network) byte order.

   Note that there is no continuation of partial events between buffers.
*/

#define RECV_PORT	1101

#ifdef ACQ_10CH
#define SEG_SIZE 	(7*1024)
#endif // ACQ_10CH
#ifdef ACQ_8CH
#define SEG_SIZE 	1024
#endif // ACQ_8CH
#define BUF_SIZE 	(SEG_SIZE - 4)
#define EVT_LEN 	25		/* deprecated */
#define SEP		0xAAAAAAAA

/* prototypes  from GSudpUtil_r.c */

int             SetupUdpReceiver(int);
int 		UdpReceiveBuf(char *buf, size_t * nbread, int maxlen);
int 		CloseUdpReceiver();