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use std::io::{BufRead, BufReader, Write, stdin, stdout};
use std::net::TcpStream;
use std::time::Instant;
#[cfg(windows)]
mod win {
use std::io;
use std::os::windows::io::AsRawHandle;
use winapi::um::consoleapi::GetConsoleMode;
use winapi::um::consoleapi::SetConsoleMode;
use winapi::um::wincon::ENABLE_VIRTUAL_TERMINAL_PROCESSING;
use winapi::um::winbase::STD_OUTPUT_HANDLE;
use winapi::um::processenv::GetStdHandle;
use winapi::shared::minwindef::DWORD;
pub fn enable_vt() -> io::Result<()> {
unsafe {
let h = GetStdHandle(STD_OUTPUT_HANDLE);
if h.is_null() { return Err(io::Error::last_os_error()); }
let mut mode: DWORD = 0;
if GetConsoleMode(h, &mut mode) == 0 {
return Err(io::Error::last_os_error());
}
let new = mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if SetConsoleMode(h, new) == 0 {
return Err(io::Error::last_os_error());
}
Ok(())
}
}
}
fn main() {
#[cfg(windows)]
win::enable_vt().unwrap();
let mut addr: Option<String>;
let mut stream: Option<TcpStream> = None;
loop {
print!("Command: ");
stdout().flush().unwrap();
let mut line = String::new();
stdin().read_line(&mut line).unwrap();
let line = line.trim();
if line.is_empty() {
continue;
}
let parts: Vec<&str> = line.splitn(2, ' ').collect();
match parts[0] {
"connect" => {
if parts.len() < 2 {
println!("Usage: connect <addr>");
continue;
}
addr = Some(parts[1].to_string());
match TcpStream::connect(addr.as_ref().unwrap()) {
Ok(s) => {
let mut ping_writer = s.try_clone().unwrap();
let mut ping_reader = BufReader::new(s.try_clone().unwrap());
let start = Instant::now();
writeln!(ping_writer, "PING").unwrap();
let mut response = String::new();
ping_reader.read_line(&mut response).unwrap();
let elapsed = start.elapsed();
println!("Connected to {} with ping delay: {:?}", addr.as_ref().unwrap(), elapsed);
stream = Some(s);
}
Err(e) => {
println!("Failed to connect: {}", e);
}
}
}
"send" => {
if stream.is_none() {
println!("Not connected. Use 'connect <addr>' first.");
continue;
}
if parts.len() < 2 {
println!("Usage: send <message>");
continue;
}
let msg = parts[1];
let s = stream.as_mut().unwrap();
let writer_stream = s.try_clone().unwrap();
let mut writer = writer_stream;
let response_reader_stream = s.try_clone().unwrap();
let mut response_reader = BufReader::new(response_reader_stream);
writeln!(writer, "{}", msg).unwrap();
let mut response = String::new();
response_reader.read_line(&mut response).unwrap();
println!("Echo: {}", response.trim());
}
"quit" => break,
_ => println!("Unknown command. Available: connect, send, quit"),
}
}
}
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