Add the opensmtpd_derive crate

opensmtpd/examples/counter.rs

@@ -0,0 +1,55 @@
+use log;
+use opensmtpd::{run_filter, Address, Filter, ReportEntry};
+use opensmtpd_derive::register;
+use simplelog::{Config, LevelFilter, WriteLogger};
+use std::fs::File;
+
+pub const DEFAULT_LOG_FILE: &str = "/tmp/counter.log";
+
+#[derive(Default)]
+struct MyCounter {
+    nb_connected: u64,
+    nb_total: u64,
+}
+
+impl Filter for MyCounter {
+    #[register]
+    fn on_report_link_connect(
+        &mut self,
+        _entry: &ReportEntry,
+        _rdns: &str,
+        _fcrdns: &str,
+        _src: &Address,
+        _dest: &Address,
+    ) {
+        self.nb_connected += 1;
+        self.nb_total += 1;
+        log::info!(
+            "New client (connected: {}, total: {})",
+            self.nb_connected,
+            self.nb_total
+        );
+    }
+
+    #[register]
+    fn on_report_link_disconnect(&mut self, _entry: &ReportEntry) {
+        self.nb_connected -= 1;
+        log::info!(
+            "Client left (connected: {}, total: {})",
+            self.nb_connected,
+            self.nb_total
+        );
+    }
+}
+
+fn main() {
+    let log_file = std::env::var("LOG_FILE").unwrap_or(String::from(DEFAULT_LOG_FILE));
+    WriteLogger::init(
+        LevelFilter::Info,
+        Config::default(),
+        File::create(&log_file).unwrap(),
+    )
+    .unwrap();
+    let mut my_counter: MyCounter = Default::default();
+    run_filter(&mut my_counter);
+}

opensmtpd/examples/samples/empty.log

@@ -0,0 +1,4 @@
+config|smtpd-version|6.6.1
+config|smtp-session-timeout|300
+config|subsystem|smtp-in
+config|ready

opensmtpd/examples/samples/single_session.log

@@ -0,0 +1,6 @@
+config|smtpd-version|6.6.1
+config|smtp-session-timeout|300
+config|subsystem|smtp-in
+config|ready
+report|0.5|1576146008.006099|smtp-in|link-connect|7641df9771b4ed00|mail.openbsd.org|pass|199.185.178.25:33174|45.77.67.80:25
+report|0.5|1576147242.200225|smtp-in|link-disconnect|7641dfb3798eb5bf