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/*
* SPDX-FileCopyrightText: 2020 Stalwart Labs Ltd <hello@stalw.art>
*
* SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
*/
use std::borrow::Cow;
use directory::Directory;
use utils::config::{utils::AsKey, Config};
use crate::{
config::smtp::session::AddressMapping,
expr::{
functions::ResolveVariable, if_block::IfBlock, tokenizer::TokenMap, Variable, V_RECIPIENT,
},
Server,
};
impl Server {
pub async fn email_to_ids(
&self,
directory: &Directory,
email: &str,
session_id: u64,
) -> trc::Result<Vec<u32>> {
let mut address = self
.core
.smtp
.session
.rcpt
.subaddressing
.to_subaddress(self, email, session_id)
.await;
for _ in 0..2 {
let result = directory.email_to_ids(address.as_ref()).await?;
if !result.is_empty() {
return Ok(result);
} else if let Some(catch_all) = self
.core
.smtp
.session
.rcpt
.catch_all
.to_catch_all(self, email, session_id)
.await
{
address = catch_all;
} else {
break;
}
}
Ok(vec![])
}
pub async fn rcpt(
&self,
directory: &Directory,
email: &str,
session_id: u64,
) -> trc::Result<bool> {
// Expand subaddress
let mut address = self
.core
.smtp
.session
.rcpt
.subaddressing
.to_subaddress(self, email, session_id)
.await;
for _ in 0..2 {
if directory.rcpt(address.as_ref()).await? {
return Ok(true);
} else if let Some(catch_all) = self
.core
.smtp
.session
.rcpt
.catch_all
.to_catch_all(self, email, session_id)
.await
{
address = catch_all;
} else {
break;
}
}
Ok(false)
}
pub async fn vrfy(
&self,
directory: &Directory,
address: &str,
session_id: u64,
) -> trc::Result<Vec<String>> {
directory
.vrfy(
self.core
.smtp
.session
.rcpt
.subaddressing
.to_subaddress(self, address, session_id)
.await
.as_ref(),
)
.await
}
pub async fn expn(
&self,
directory: &Directory,
address: &str,
session_id: u64,
) -> trc::Result<Vec<String>> {
directory
.expn(
self.core
.smtp
.session
.rcpt
.subaddressing
.to_subaddress(self, address, session_id)
.await
.as_ref(),
)
.await
}
}
impl AddressMapping {
pub fn parse(config: &mut Config, key: impl AsKey) -> Self {
let key = key.as_key();
if let Some(value) = config.value(key.as_str()) {
match value {
"true" => AddressMapping::Enable,
"false" => AddressMapping::Disable,
_ => {
config.new_parse_error(
key,
format!("Invalid value for address mapping {value:?}",),
);
AddressMapping::Disable
}
}
} else if let Some(if_block) = IfBlock::try_parse(
config,
key,
&TokenMap::default().with_variables_map([
("address", V_RECIPIENT),
("email", V_RECIPIENT),
("rcpt", V_RECIPIENT),
]),
) {
AddressMapping::Custom(if_block)
} else {
AddressMapping::Enable
}
}
}
struct Address<'x>(&'x str);
impl ResolveVariable for Address<'_> {
fn resolve_variable(&self, _: u32) -> crate::expr::Variable {
Variable::from(self.0)
}
}
impl AddressMapping {
pub async fn to_subaddress<'x, 'y: 'x>(
&'x self,
core: &Server,
address: &'y str,
session_id: u64,
) -> Cow<'x, str> {
match self {
AddressMapping::Enable => {
if let Some((local_part, domain_part)) = address.rsplit_once('@') {
if let Some((local_part, _)) = local_part.split_once('+') {
return format!("{}@{}", local_part, domain_part).into();
}
}
}
AddressMapping::Custom(if_block) => {
if let Some(result) = core
.eval_if::<String, _>(if_block, &Address(address), session_id)
.await
{
return result.into();
}
}
AddressMapping::Disable => (),
}
address.into()
}
pub async fn to_catch_all<'x, 'y: 'x>(
&'x self,
core: &Server,
address: &'y str,
session_id: u64,
) -> Option<Cow<'x, str>> {
match self {
AddressMapping::Enable => address
.rsplit_once('@')
.map(|(_, domain_part)| format!("@{}", domain_part))
.map(Cow::Owned),
AddressMapping::Custom(if_block) => core
.eval_if::<String, _>(if_block, &Address(address), session_id)
.await
.map(Cow::Owned),
AddressMapping::Disable => None,
}
}
}
|
