From 97b2783672ec5661007ac7c9e3d1c14e9e813788 Mon Sep 17 00:00:00 2001
From: Paul <paul@paulbsd.com>
Date: Sun, 15 Dec 2024 20:54:56 +0100
Subject: [PATCH] initial commit

---
 .gitignore  |   1 +
 Cargo.lock  | 339 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |   7 ++
 src/main.rs | 108 +++++++++++++++++
 4 files changed, 455 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..670b9e3
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,339 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..e966b21
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "micodus_server"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+tokio = { version = "1.42", features = ["full", "sync"] }
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..8426c10
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,108 @@
+use std::io;
+use std::sync::Arc;
+use tokio::io::AsyncWriteExt;
+use tokio::net::TcpListener;
+use tokio::sync::RwLock;
+
+const FLAG: u8 = 0x7e;
+
+#[tokio::main]
+async fn main() {
+    apiserver().await.unwrap();
+    loop {
+        std::thread::sleep(std::time::Duration::from_secs(1));
+    }
+}
+
+pub async fn apiserver() -> io::Result<()> {
+    let addr = "0.0.0.0:7700";
+    let listener = match TcpListener::bind(addr).await {
+        Ok(o) => o,
+        Err(e) => {
+            println!("error: {e}");
+            std::process::exit(1);
+        }
+    };
+
+    tokio::spawn(async move {
+        loop {
+            match listener.accept().await {
+                Ok((mut socket, _addr)) => {
+                    let mut buf = vec![0; 256];
+
+                    match socket.readable().await {
+                        Ok(_) => {
+                            match socket.try_read(&mut buf) {
+                                Ok(_) => {}
+                                Err(e) => {
+                                    println!("error: {e}");
+                                    continue;
+                                }
+                            };
+                        }
+                        Err(e) => {
+                            println!("error: {e}");
+                            continue;
+                        }
+                    }
+
+                    let data = buf.to_vec();
+                    let msg = parse_msg(data);
+                    println!("{:X?}", msg);
+                }
+                Err(err) => {
+                    println!("error: {err}");
+                }
+            }
+        }
+    });
+    Ok(())
+}
+
+fn parse_msg(data: Vec<u8>) -> Message {
+    if data[0] == FLAG {
+        println!("first flag ok");
+    };
+
+    let mut msg: Message = Message::default();
+
+    msg.Header.Id = msg.Header.Id + (data[1] << 1) as u16 + data[2] as u16;
+    msg.Header.Properties = msg.Header.Properties + (data[3] << 1) as u16 + data[4] as u16;
+    for (i, v) in data[5..11].iter().enumerate() {
+        msg.Header.TerminalId[i] = *v;
+    }
+    msg.Header.SerialNumber = msg.Header.SerialNumber + (data[11] << 1) as u16 + data[12] as u16;
+
+    let endbody = 13 + msg.Header.Properties as usize;
+    let range: std::ops::Range<usize> = 13..(endbody);
+    let check_idx = 13 + msg.Header.Properties as usize;
+    let endflag: u8 = check_idx as u8 + 1;
+
+    for i in data[range].iter() {
+        msg.Body.push(*i);
+    }
+
+    msg.Check = data[check_idx];
+
+    if data[endflag as usize] == FLAG {
+        println!("end flag ok");
+    } else {
+        println!("error with endflag");
+    }
+    msg
+}
+
+#[derive(Default, Debug)]
+pub struct Message {
+    pub Header: MessageHeader,
+    pub Body: Vec<u8>,
+    pub Check: u8,
+}
+
+#[derive(Default, Debug)]
+pub struct MessageHeader {
+    pub Id: u16,
+    pub Properties: u16,
+    pub TerminalId: [u8; 6],
+    pub SerialNumber: u16,
+}