Concatenation of incoming SMS

as it is better to merge catenated incoming messages at the kannel level, so the app needs only deal with a message,
I have written code to do this,  but then as i am only concerned with SMPP,  not sure how other protocols would
have the same issue ?
I wrote the code at the bb_smscconn.c level,  but i'm only worried about SMPP as i said.