Added connect timeout based on W5100 RTR value for Uthernet2

a2stream/a2stream.md

@@ -3,10 +3,13 @@ To prepare an .a2stream file for streaming:
  Create a header-less .raw file with 22050Hz mono 32-bit-float PCM data (e.g. with Audacity)
  Generate an .a2stream file from the .raw file with gena2stream (source code)
   Put a standard 16kB .dhgr file beside the .raw file for custom cover art (optional)
+  Use b2d <24-bit bmp> -d9
   Use the option to -p switch the visualization from level meter to progress bar
  Put the .a2stream file onto any HTTP (not HTTPS) server
   Run a simple local HTTP server on Windows
   Run the HTTP File Server and drop the file you want to stream in its Virtual File System
   Run a simple local HTTP server on Linux
   cd to the directory containing the file you want to stream and enter python -m SimpleHTTPServer or python3 -m http.server depending on the Python version you want to use
 
+Extract audio 
+ffmpeg -i Sample.avi -vn -ar 44100 -ac 2 -ab 192k -f mp3 Sample.mp3

emulator/src/network.rs

@@ -4,6 +4,7 @@ use crate::video::Video;
 use std::io::ErrorKind;
 use std::io::{Read, Write};
 use std::net::{IpAddr, Ipv4Addr, Shutdown, SocketAddr, TcpListener, TcpStream, ToSocketAddrs};
+use std::time::Duration;
 
 #[cfg(feature = "serde_support")]
 use crate::marshal::{as_hex, from_hex_32k};
@@ -760,9 +761,16 @@ impl Uthernet2 {
  IpAddr::V4(Ipv4Addr::new(dest[0], dest[1], dest[2], dest[3])),
  port,
  );
- u2_debug!("Connect Socket on #{i} to {sock_addr:?} ...");
+ let rtr_bytes = [self.mem[W5100_RTR0], self.mem[W5100_RTR1]];
+ let rtr = u16::from_be_bytes(rtr_bytes) as u64;
 
- if let Ok(stream) = TcpStream::connect(sock_addr) {
+ u2_debug!(
+ "Connect Socket on #{i} to {sock_addr:?} with timeout = {} µs ...",
+ rtr * 100
+ );
+
+ if let Ok(stream) = TcpStream::connect_timeout(&sock_addr, Duration::from_micros(rtr * 100))
+ {
  u2_debug!("Connect Socket on #{i} to {sock_addr:?} - OK");
  stream
  .set_nonblocking(true)