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mod auth;
mod callbacks;
mod config;
mod header;
mod resolver;
mod verifier;
pub use crate::config::{
cli_opts::{CliOptions, CliOptionsBuilder},
model::{
LogDestination, LogLevel, ParseLogDestinationError, ParseLogLevelError,
ParseSyslogFacilityError, SyslogFacility,
},
};
use crate::{
callbacks::*,
config::{cli_opts, read},
resolver::MockResolver,
};
use log::{error, info, LevelFilter, Log, Metadata, Record, SetLoggerError};
use milter::Milter;
use signal_hook::flag;
use std::sync::Arc;
use viaspf::Lookup;
pub const MILTER_NAME: &str = "SPF Milter";
pub const VERSION: &str = "0.0.4";
pub fn run(opts: CliOptions) -> milter::Result<()> {
init_and_run(opts, None)
}
pub fn run_with_lookup(
opts: CliOptions,
lookup: impl Lookup + Send + Sync + 'static,
) -> milter::Result<()> {
init_and_run(opts, Some(MockResolver::new(lookup)))
}
fn init_and_run(opts: CliOptions, mock_resolver: Option<MockResolver>) -> milter::Result<()> {
init_static_config(opts, mock_resolver)?;
let socket = {
let config = config::current();
config.socket().to_owned()
};
let reload_flag = config::get_reload_flag();
flag::register(signal_hook::SIGUSR1, Arc::clone(reload_flag))
.map_err(|e| format!("failed to register signal handler: {}", e))?;
info!("{} {} starting", MILTER_NAME, VERSION);
let result = Milter::new(&socket)
.name(MILTER_NAME)
.on_negotiate(negotiate_callback)
.on_connect(connect_callback)
.on_helo(helo_callback)
.on_mail(mail_callback)
.on_header(header_callback)
.on_eom(eom_callback)
.on_abort(abort_callback)
.on_close(close_callback)
.remove_socket(true)
.run();
match &result {
Ok(_) => info!("{} {} shut down", MILTER_NAME, VERSION),
Err(e) => error!("{} {} terminated with error: {}", MILTER_NAME, VERSION, e),
}
result
}
fn init_static_config(opts: CliOptions, mock_resolver: Option<MockResolver>) -> milter::Result<()> {
cli_opts::init(opts);
resolver::init_mock(mock_resolver);
let opts = cli_opts::get();
let config = read::read_config(opts).map_err(|e| {
format!(
"failed to load configuration from {}: {}",
opts.config_file().display(),
read::focus_error(&e)
)
})?;
match config.log_destination() {
LogDestination::Syslog => {
syslog::init_unix(config.syslog_facility().into(), config.log_level().into())
.map_err(|e| format!("could not initialize syslog: {}", e))?;
}
LogDestination::Stderr => {
StderrLog::init(config.log_level())
.map_err(|e| format!("could not initialize stderr log: {}", e))?;
}
}
config::init(config);
Ok(())
}
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
struct StderrLog {
level: LevelFilter,
}
impl StderrLog {
fn init<L: Into<LevelFilter>>(level: L) -> Result<(), SetLoggerError> {
let level = level.into();
log::set_boxed_logger(Box::new(Self { level }))
.map(|_| log::set_max_level(level))
}
}
impl Log for StderrLog {
fn enabled(&self, metadata: &Metadata) -> bool {
metadata.level() <= self.level
}
fn log(&self, record: &Record) {
if self.enabled(record.metadata()) {
eprintln!("{}", record.args());
}
}
fn flush(&self) {}
}
pub fn reload_config() {
config::set_reload();
}