csu3_am335x/EVSE/GPL/plc-utils.LNX.2.1.20/source/slac/slac_connect.c

/*====================================================================*
*
*   Copyright (c) 2013 Qualcomm Atheros, Inc.
*
*   All rights reserved.
*
*====================================================================*/

/*====================================================================*
 *
 *   void slac_connect (struct session * session);
 *   
 *   slac.h
 *
 *   compute the arithmetic mean of session attenuation values and
 *   compare to the session limit; average attenuation greater than
 *   the session limit is considered a bad connection;
 *
 *--------------------------------------------------------------------*/

#ifndef SLAC_AVERAGE_SOURCE
#define SLAC_AVERAGE_SOURCE

#include "../tools/error.h"
#include "../tools/flags.h"
#include "../tools/memory.h"
#include "../slac/slac.h"

signed slac_connect (struct session * session) 

{ 
	unsigned group = 0; 
	unsigned total = 0; 
	if (session->NumGroups > SIZEOF (session->AAG)) 
	{ 
		return (debug (session->exit, __func__, "Too much data to analyse!")); 
	} 
	if (session->NumGroups > 0) 
	{ 
		char string [512]; 
		while (group < session->NumGroups) 
		{ 
			total += session->AAG [group]; 
			group++; 
		} 
		total /= group; 
		if (total > session->limit) 
		{ 
			char string [512]; 
			debug (0, __func__, "Average attenuation (%u) more than limit (%u) frow %d groups", total, session->limit, group); 
			debug (0, __func__, "%s", HEXSTRING (string, session->AAG)); 
			return (- 1); 
		} 
		if (total > 0) 
		{ 
			debug (0, __func__, "Average attenuation (%u) less than limit (%u) from %d groups", total, session->limit, group); 
			debug (0, __func__, "%s", HEXSTRING (string, session->AAG)); 
			return (0); 
		} 
	} 
	return (debug (session->exit, __func__, "Nothing to analyse")); 
} 

#endif