From 04a47e18e4c23f1478658a98bd4d2afe3e06471d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rodolphe=20Br=C3=A9ard?= <rodolphe@what.tf>
Date: Sun, 19 Mar 2023 17:13:49 +0100
Subject: [PATCH] Implement the initial handshake

---
 src/handshake.rs | 23 +++++++++++++++++++++++
 src/main.rs      |  5 ++++-
 2 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 src/handshake.rs

diff --git a/src/handshake.rs b/src/handshake.rs
new file mode 100644
index 0000000..c293387
--- /dev/null
+++ b/src/handshake.rs
@@ -0,0 +1,23 @@
+pub const CONFIG_END: &str = "config|ready";
+pub const CONFIG_TAG: &str = "config|";
+
+pub fn read_config() {
+	let mut buffer = String::new();
+	let stdin = std::io::stdin();
+	loop {
+		buffer.clear();
+		stdin.read_line(&mut buffer).unwrap();
+		let entry = buffer.trim_end();
+		if entry == CONFIG_END {
+			return;
+		}
+		if !entry.starts_with(CONFIG_TAG) {
+			eprintln!("invalid config line: {entry}");
+		}
+	}
+}
+
+pub fn register_filter() {
+	println!("register|filter|smtp-in|data-line");
+	println!("register|ready");
+}
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..b0e76f1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,6 @@
+mod handshake;
+
 fn main() {
-    println!("Hello, world!");
+	handshake::read_config();
+	handshake::register_filter();
 }