NG_L2CAP_FIRST_IDENT
con->ident = NG_L2CAP_FIRST_IDENT - 1;
if (ident < NG_L2CAP_FIRST_IDENT)
ident = NG_L2CAP_FIRST_IDENT;
if (ident < NG_L2CAP_FIRST_IDENT)
ident = NG_L2CAP_FIRST_IDENT;