/*comparing received RAT Type from ip packet with numeric value */
if(pDefBearer.data.recv.ratType == 1)
{
        avp.my_ccr.rattype = GERAN; /* setting RAT as GERAN(enumerated value) i.e 2G */
        /* further processing of packet */
}
else
{
        avp.my_ccr.rattype = UTRAN;
}

if(pDefBearer.data.recv.ratType == DB_RAT_GERAN) /* DB_RAT_GERAN is a macro defined somewhere in header file */
{
        avp.my_ccr.rattype = GERAN; /* setting RAT as GERAN i.e 2G */
        /* further processing of packet */
}
else
{
        avp.my_ccr.rattype = UTRAN;
}

if(pDefBearer.data.recv.ratType = 1) { /* always set RAT as 2G */ }

if(DB_RAT_GERAN == pDefaultBearer.data.recv.ratType)

if(pDefaultBearer.data.recv.ratType == DB_RAT_GERAN)

if(DB_RAT_GERAN = pDefaultBearer.data.recv.ratType){ }

if(pDefaultBearer.data.recv.ratType = DB_RAT_GERAN) { }