138 lines
4.4 KiB
Rust
138 lines
4.4 KiB
Rust
/*
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* Copyright (c) 2023 Stalwart Labs Ltd.
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*
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* This file is part of Stalwart Mail Server.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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* in the LICENSE file at the top-level directory of this distribution.
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* You can be released from the requirements of the AGPLv3 license by
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* purchasing a commercial license. Please contact licensing@stalw.art
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* for more details.
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*/
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use super::*;
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use utils::config::{
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utils::{AsKey, NoConstants},
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Config,
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};
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pub trait ConfigThrottle {
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fn parse_throttle(
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&self,
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prefix: impl AsKey,
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available_envelope_keys: &[u32],
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available_throttle_keys: u16,
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) -> super::Result<Vec<Throttle>>;
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fn parse_throttle_item(
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&self,
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prefix: impl AsKey,
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available_envelope_keys: &[u32],
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available_throttle_keys: u16,
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) -> super::Result<Throttle>;
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}
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impl ConfigThrottle for Config {
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fn parse_throttle(
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&self,
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prefix: impl AsKey,
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available_envelope_keys: &[u32],
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available_throttle_keys: u16,
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) -> super::Result<Vec<Throttle>> {
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let prefix_ = prefix.as_key();
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let mut throttles = Vec::new();
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for array_pos in self.sub_keys(prefix, "") {
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throttles.push(self.parse_throttle_item(
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(&prefix_, array_pos),
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available_envelope_keys,
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available_throttle_keys,
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)?);
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}
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Ok(throttles)
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}
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fn parse_throttle_item(
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&self,
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prefix: impl AsKey,
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available_envelope_keys: &[u32],
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available_throttle_keys: u16,
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) -> super::Result<Throttle> {
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let prefix = prefix.as_key();
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let mut keys = 0;
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for (key_, value) in self.values((&prefix, "key")) {
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let key = value.parse_throttle_key(key_)?;
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if (key & available_throttle_keys) != 0 {
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keys |= key;
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} else {
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return Err(format!(
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"Throttle key {value:?} is not available in this context for property {key_:?}"
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));
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}
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}
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let throttle = Throttle {
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expr: if let Some(expr) = self.value((&prefix, "match")) {
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Expression::parse((&prefix, "match"), expr, |name| {
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map_expr_token::<NoConstants>(name, available_envelope_keys)
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})?
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} else {
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Expression::default()
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},
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keys,
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concurrency: self
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.property::<u64>((prefix.as_str(), "concurrency"))?
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.filter(|&v| v > 0),
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rate: self
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.property::<Rate>((prefix.as_str(), "rate"))?
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.filter(|v| v.requests > 0),
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};
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// Validate
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if throttle.rate.is_none() && throttle.concurrency.is_none() {
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Err(format!(
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concat!(
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"Throttle {:?} needs to define a ",
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"valid 'rate' and/or 'concurrency' property."
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),
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prefix
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))
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} else {
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Ok(throttle)
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}
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}
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}
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pub trait ParseTrottleKey {
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fn parse_throttle_key(&self, key: &str) -> super::Result<u16>;
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}
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impl ParseTrottleKey for &str {
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fn parse_throttle_key(&self, key: &str) -> super::Result<u16> {
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match *self {
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"rcpt" => Ok(THROTTLE_RCPT),
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"rcpt_domain" => Ok(THROTTLE_RCPT_DOMAIN),
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"sender" => Ok(THROTTLE_SENDER),
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"sender_domain" => Ok(THROTTLE_SENDER_DOMAIN),
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"authenticated_as" => Ok(THROTTLE_AUTH_AS),
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"listener" => Ok(THROTTLE_LISTENER),
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"mx" => Ok(THROTTLE_MX),
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"remote_ip" => Ok(THROTTLE_REMOTE_IP),
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"local_ip" => Ok(THROTTLE_LOCAL_IP),
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"helo_domain" => Ok(THROTTLE_HELO_DOMAIN),
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_ => Err(format!("Invalid throttle key {self:?} found in {key:?}")),
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}
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}
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}
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