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//! Local AtomicReadFile request-count and logical service-ACK limits.
use super::*;
/// Positive local limits, independent of peer APDU size and segmentation.
///
/// Raw request counts are checked after existing handler validation, before the
/// storage read. ACK bytes include every service field but exclude APDU/NPDU.
/// This does not bound opaque storage work or its single owned read result;
/// notably, a record-count limit is not a total storage-byte limit.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct AtomicReadFileBudget {
/// Maximum raw requested stream octets (default 16384).
pub max_requested_stream_octets: usize,
/// Maximum raw requested records (default 256); the legacy read window remains.
pub max_requested_records: usize,
/// Maximum complete encoded service ACK bytes (default 16384).
pub max_service_ack_bytes: usize,
}
impl Default for AtomicReadFileBudget {
fn default() -> Self {
Self {
max_requested_stream_octets: 16384,
max_requested_records: 256,
max_service_ack_bytes: 16384,
}
}
}
impl AtomicReadFileBudget {
/// Reject zero configuration values before startup. Request counts may be zero.
pub fn validate(&self) -> Result<(), Error> {
for (name, value) in [
(
"atomic_read_file_max_requested_stream_octets",
self.max_requested_stream_octets,
),
(
"atomic_read_file_max_requested_records",
self.max_requested_records,
),
(
"atomic_read_file_max_service_ack_bytes",
self.max_service_ack_bytes,
),
] {
if value == 0 {
return Err(Error::Encoding(format!("{name} must be positive")));
}
}
Ok(())
}
}
impl<T: TransportPort + 'static> ServerBuilder<T> {
/// Set AtomicReadFile limits validated before transport startup.
pub fn atomic_read_file_budget(mut self, budget: AtomicReadFileBudget) -> Self {
self.config.atomic_read_file_budget = budget;
self
}
}
impl BipServerBuilder {
/// Set AtomicReadFile limits validated before transport startup.
pub fn atomic_read_file_budget(mut self, budget: AtomicReadFileBudget) -> Self {
self.config.atomic_read_file_budget = budget;
self
}
}
#[cfg(feature = "sc-tls")]
impl ScServerBuilder {
/// Set AtomicReadFile limits validated before SC dialing.
pub fn atomic_read_file_budget(mut self, budget: AtomicReadFileBudget) -> Self {
self.config.atomic_read_file_budget = budget;
self
}
}