commit 5134589f6e637bc1f7f2277fd3459692f73929d4
Author: clerie <git@clerie.de>
Date:   Tue Oct 15 23:48:06 2024 +0200

    Init repo

diff --git a/.gitignore b/.gitignore
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diff --git a/Cargo.lock b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..3a3bcf6
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "improv-setup"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+anyhow = "1.0.86"
+clap = { version = "4.5.16", features = ["derive"] }
+env_logger = "0.11.5"
+hex = "0.4.3"
+log = "0.4.22"
+tokio = { version = "1.39.3", features = ["macros", "net", "rt-multi-thread"] }
+tokio-serial = "5.4.4"
diff --git a/src/improv.rs b/src/improv.rs
new file mode 100644
index 0000000..a896cee
--- /dev/null
+++ b/src/improv.rs
@@ -0,0 +1,105 @@
+pub const IMPROV_HEADER: [u8; 6] = [
+    'I' as u8,
+    'M' as u8,
+    'P' as u8,
+    'R' as u8,
+    'O' as u8,
+    'V' as u8,
+];
+
+pub const IMPROV_VERSION: u8 = 0x01;
+
+#[derive(Clone, PartialEq)]
+#[repr(u8)]
+pub enum PacketType {
+    CurrentState = 0x01,
+    ErrorState = 0x02,
+    RPCCommand = 0x03,
+    RPCResult = 0x04,
+}
+
+impl TryFrom<&u8> for PacketType {
+    type Error= &'static str;
+
+    fn try_from(b: &u8) -> Result<Self, Self::Error> {
+        match b {
+            0x01 => Ok(Self::CurrentState),
+            0x02 => Ok(Self::ErrorState),
+            0x03 => Ok(Self::RPCCommand),
+            0x04 => Ok(Self::RPCResult),
+            _ => Err("Cannot convert to packet type"),
+        }
+    }
+}
+
+impl std::fmt::Display for PacketType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::CurrentState => write!(f, "Current State"),
+            Self::ErrorState => write!(f, "Error State"),
+            Self::RPCCommand => write!(f, "RPC Command"),
+            Self::RPCResult => write!(f, "RPC Result"),
+        }
+    }
+}
+
+#[derive(Clone)]
+#[repr(u8)]
+pub enum CurrentState {
+    Ready = 0x02,
+    Provisioning = 0x03,
+    Provisioned = 0x04,
+}
+
+
+impl TryFrom<&u8> for CurrentState {
+    type Error= &'static str;
+
+    fn try_from(b: &u8) -> Result<Self, Self::Error> {
+        match b {
+            0x02 => Ok(Self::Ready),
+            0x03 => Ok(Self::Provisioning),
+            0x04 => Ok(Self::Provisioned),
+            _ => Err("Cannot convert to current state"),
+        }
+    }
+}
+
+impl std::fmt::Display for CurrentState {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Ready => write!(f, "Ready"),
+            Self::Provisioning => write!(f, "Provisioning"),
+            Self::Provisioned => write!(f, "Provisioned"),
+        }
+    }
+}
+
+#[derive(Clone)]
+#[repr(u8)]
+pub enum ErrorState {
+    NoError = 0x00,
+    InvalidRPCPacket = 0x01,
+    UnknownRPCCommand = 0x02,
+    UnableToConnect = 0x03,
+    UnknownError = 0xFF,
+}
+
+#[derive(Clone)]
+#[repr(u8)]
+pub enum RPCCommand {
+    SendWifiSettings = 0x01,
+    RequestCurrentState = 0x02,
+}
+
+pub fn calculate_checksum(data: &Vec<u8>) -> u8 {
+    // Pass data as full packet, with header, but without checksum byte
+
+    let mut checksum: u8 = 0x00;
+
+    for e in data {
+        checksum = checksum.wrapping_add(e.clone());
+    }
+
+    return checksum;
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..8db7725
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1 @@
+pub mod improv;
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..d297e7b
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,179 @@
+use anyhow::{
+    Context,
+    Result,
+};
+use clap::{
+    Parser,
+    Subcommand,
+};
+use env_logger;
+use hex;
+use improv_setup::improv::{
+    IMPROV_HEADER,
+    IMPROV_VERSION,
+    PacketType,
+    RPCCommand,
+    CurrentState,
+    calculate_checksum,
+};
+use log::{
+    debug,
+    log_enabled,
+    info,
+    Level,
+};
+use tokio_serial;
+
+#[derive(Subcommand, Clone)]
+enum DeviceCommands {
+    /// Set wifi credentials
+    SetWifi {
+        /// SSID of the network
+        ssid: String,
+        /// Password for the SSID
+        password: String,
+    },
+}
+
+#[derive(Subcommand, Clone)]
+enum Commands {
+    /// List available serial devices
+    ListDevices,
+    /// Device
+    Device {
+        /// Path to the serial device
+        path: String,
+        /// Baud rate used for connecting to the serial device
+        #[arg(long, default_value_t = 115200)]
+        baud_rate: u32,
+        #[command(subcommand)]
+        device_command: Option<DeviceCommands>,
+    },
+}
+
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+struct Cli {
+    #[command(subcommand)]
+    command: Option<Commands>,
+}
+
+fn to_ascii_debug(bytes: &Vec<u8>) -> String {
+    let mut out = String::new();
+
+    for b in bytes {
+        if b.is_ascii_graphic() {
+            out += &b.escape_ascii().to_string();
+        }
+        else {
+            out.push_str(".");
+        }
+    }
+
+    return out;
+}
+
+fn find_begin_of_improv_packet(buffer: &Vec<u8>) -> Result<usize, String> {
+
+    let mut improv_header_char: usize = 0;
+
+    for (i, b) in buffer.iter().enumerate() {
+        if b == &IMPROV_HEADER[improv_header_char] {
+            improv_header_char += 1;
+
+            if improv_header_char >= IMPROV_HEADER.len() {
+                return Ok(i - (IMPROV_HEADER.len() - 1));
+            }
+        }
+        else {
+            improv_header_char = 0;
+            if b == &IMPROV_HEADER[improv_header_char] {
+                improv_header_char += 1;
+            }
+        }
+    }
+
+    return Err(String::from("Improv header not found"));
+}
+
+#[tokio::main]
+async fn main() -> Result<()>{
+    env_logger::init();
+
+    let cli = Cli::parse();
+
+    let command: Commands = match &cli.command {
+        Some(command) => command.clone(),
+        None => Commands::ListDevices,
+    };
+
+    match &command {
+        Commands::ListDevices => {
+            println!("{}", tokio_serial::available_ports()
+                .unwrap()
+                .iter()
+                .map(|serialport| serialport.port_name.clone())
+                .fold(String::new(), |a, b| a + &b + &String::from("\n")));
+        },
+        Commands::Device {path, baud_rate, device_command} => {
+            let mut rpc_command_request_current_state: Vec<u8> = Vec::new();
+            rpc_command_request_current_state.extend(IMPROV_HEADER);
+            rpc_command_request_current_state.push(IMPROV_VERSION);
+            rpc_command_request_current_state.push(PacketType::RPCCommand as u8);
+
+            let mut data: Vec<u8> = Vec::new();
+            data.push(RPCCommand::RequestCurrentState as u8); // command
+            data.push(0x00); // command data length
+
+            rpc_command_request_current_state.push(data.len().try_into().unwrap()); // length
+            rpc_command_request_current_state.extend(data.clone()); // data
+
+            let checksum: u8 = calculate_checksum(&rpc_command_request_current_state);
+            println!("{}", hex::encode([checksum.clone()]));
+            rpc_command_request_current_state.push(checksum);
+
+            println!("{}", hex::encode(&rpc_command_request_current_state));
+            println!("{}", to_ascii_debug(&rpc_command_request_current_state));
+
+            let mut serial_interface = tokio_serial::new(path, *baud_rate).open().unwrap();
+
+            serial_interface.write(&rpc_command_request_current_state).unwrap();
+
+            let mut buffer: Vec<u8> = Vec::new();
+            serial_interface.read_to_end(&mut buffer);
+
+            println!("{}", hex::encode(&buffer));
+            println!("{}", to_ascii_debug(&buffer));
+            println!("{}", std::str::from_utf8(&buffer).unwrap_or(""));
+
+            let improv_packet_offset = find_begin_of_improv_packet(&buffer).unwrap();
+            println!("{}", improv_packet_offset);
+
+            let mut packet_index = improv_packet_offset;
+
+            // skip header
+            packet_index += 6;
+
+            // version
+            println!("Version: {}", &buffer[packet_index]);
+            packet_index += 1;
+
+            // type
+            let packet_type = PacketType::try_from(&buffer[packet_index]).unwrap();
+            println!("Type: {}", &packet_type);
+            packet_index += 1;
+
+            if packet_type == PacketType::CurrentState {
+                // skip length
+                packet_index +=1;
+
+                let current_state = CurrentState::try_from(&buffer[packet_index]).unwrap();
+                println!("Current state: {}", &current_state);
+                packet_index += 1;
+            }
+
+        },
+    };
+
+    Ok(())
+}