NG_L2CAP_PSM_RFCOMM
case NG_L2CAP_PSM_RFCOMM:
l2sa.l2cap_psm = (dst == NULL)? htole16(NG_L2CAP_PSM_RFCOMM) : 0;
l2sa.l2cap_psm = htole16(NG_L2CAP_PSM_RFCOMM);