git repo for rust version of asciifarm

5 files changed, 289 insertions, 0 deletions

diff --git a/src/server/gameserver.rs b/src/server/gameserver.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/server/gameserver.rs
@@ -0,0 +1 @@
+
diff --git a/src/server/mod.rs b/src/server/mod.rs
new file mode 100644
index 0000000..131eb19
--- /dev/null
+++ b/src/server/mod.rs
@@ -0,0 +1,22 @@
+use std::io;
+
+pub mod tcpserver;
+pub mod unixserver;
+
+mod streamconnection;
+
+
+pub trait Server {
+	
+	fn accept_pending_connections(&mut self) -> Vec<usize>;
+	
+	fn recv_pending_messages(&mut self) -> (Vec<(usize, String)>, Vec<usize>);
+	
+	fn send(&mut self, id: usize, text: &str) -> Result<(), io::Error>;
+	
+	fn broadcast(&mut self, text: &str);
+	
+	fn get_name(&self, _id: usize) -> Option<String> {
+		None
+	}
+}
diff --git a/src/server/streamconnection.rs b/src/server/streamconnection.rs
new file mode 100644
index 0000000..2bb111a
--- /dev/null
+++ b/src/server/streamconnection.rs
@@ -0,0 +1,68 @@
+
+
+use std::io;
+use std::io::{Read, Write};
+use std::mem::transmute;
+
+
+pub struct StreamConnection<T: Read+Write> {
+	pub stream: T,
+	buffer: Vec<u8>
+}
+
+impl <T: Read+Write> StreamConnection<T> {
+	
+	pub fn new(stream: T) -> StreamConnection<T> {
+		StreamConnection {
+			stream,
+			buffer: Vec::new()
+		}
+	}
+	
+	pub fn read(&mut self) -> Result<(Vec<String>, bool), io::Error> {
+		let mut buf = [0; 2048];
+		let mut closed = false;
+		loop {
+			match self.stream.read(&mut buf) {
+				Err(e) => {
+					if e.kind() == io::ErrorKind::WouldBlock {
+						break;
+					} else {
+						return Err(e);
+					}
+				}
+				Ok(0) => {
+					closed = true;
+					break;
+				}
+				Ok(i) => {
+					self.buffer.extend_from_slice(&buf[..i]);
+// 					messages.push(String::from_utf8_lossy(&buf[..i]).to_string());
+				}
+			}
+		}
+		let mut messages = Vec::new();
+		while self.buffer.len() >= 4 {
+			let mut header: [u8; 4] = [0;4];
+			header.copy_from_slice(&self.buffer[..4]);
+			let mlen: usize = u32::from_be(unsafe { transmute(header) }) as usize;
+			if self.buffer.len() - 4 < mlen {
+				break;
+			}
+			let rest = self.buffer.split_off(4+mlen);
+			let message = String::from_utf8_lossy(&self.buffer[4..]).to_string();
+			messages.push(message);
+			self.buffer = rest;
+		}
+		return Ok((messages, closed));
+	}
+	
+	pub fn send(&mut self, text: &str) -> Result<(), io::Error> {
+		let bytes: &[u8] = text.as_bytes();
+		let len: u32 = bytes.len() as u32;
+		let header: [u8; 4] = unsafe { transmute(len.to_be()) };
+		self.stream.write_all(&header)?;
+		self.stream.write_all(bytes)
+	}
+	
+}
diff --git a/src/server/tcpserver.rs b/src/server/tcpserver.rs
new file mode 100644
index 0000000..b411634
--- /dev/null
+++ b/src/server/tcpserver.rs
@@ -0,0 +1,89 @@
+
+
+use std::io;
+use std::net::SocketAddr;
+use mio::net::{TcpListener, TcpStream};
+use slab::Slab;
+
+use self::super::streamconnection::StreamConnection;
+
+
+pub struct TcpServer {
+	listener: TcpListener,
+	connections: Slab<StreamConnection<TcpStream>>
+}
+
+impl TcpServer {
+
+	pub fn new(addr: &SocketAddr) -> Result<TcpServer, io::Error> {
+		let listener = TcpListener::bind(addr)?;
+		Ok( TcpServer {
+			listener,
+			connections: Slab::new()
+		})
+	}
+}
+
+impl super::Server for TcpServer {
+
+	fn accept_pending_connections(&mut self) -> Vec<usize> {
+		let mut new_connections = Vec::new();
+		loop {
+			match self.listener.accept() {
+				Err(_e) => {
+					break;
+				}
+				Ok((stream, _address)) => {
+					let con = StreamConnection::new(stream);
+					let id = self.connections.insert(con);
+					new_connections.push(id);
+				}
+			}
+		}
+		new_connections
+	}
+
+
+	fn recv_pending_messages(&mut self) -> (Vec<(usize, String)>, Vec<usize>){
+	// 	let mut buf = [0; 2048];
+		let mut messages: Vec<(usize, String)> = Vec::new();
+		let mut to_remove = Vec::new();
+		for (key, connection) in self.connections.iter_mut(){
+			match connection.read() {
+				Err(_e) => {
+					to_remove.push(key);
+				}
+				Ok((con_messages, closed)) => {
+					for message in con_messages {
+						messages.push((key, message));
+					}
+					if closed {
+						to_remove.push(key);
+					}
+				}
+			}
+		}
+		for key in to_remove.iter() {
+			self.connections.remove(*key);
+		}
+		(messages, to_remove)
+	}
+
+	fn broadcast(&mut self, text: &str) {
+		for (_id, conn) in self.connections.iter_mut() {
+			conn.send(text).expect("BroadCast Failed");
+		}
+	}
+	
+	fn send(&mut self, id: usize, text: &str) -> Result<(), io::Error> {
+		match self.connections.get_mut(id){
+			Some(conn) => {
+				conn.send(text)
+			}
+			None => Err(io::Error::new(io::ErrorKind::Other, "index is empty"))
+		}
+	}
+	
+
+}
+
diff --git a/src/server/unixserver.rs b/src/server/unixserver.rs
new file mode 100644
index 0000000..dc9feab
--- /dev/null
+++ b/src/server/unixserver.rs
@@ -0,0 +1,109 @@
+
+
+use std::io;
+use std::path::Path;
+use std::os::unix::io::AsRawFd;
+use mio_uds::{UnixListener, UnixStream};
+use slab::Slab;
+use nix::sys::socket::getsockopt;
+use nix::sys::socket::sockopt;
+use users;
+
+use self::super::streamconnection::StreamConnection;
+
+
+pub struct UnixServer {
+	listener: UnixListener,
+	connections: Slab<StreamConnection<UnixStream>>
+}
+
+impl UnixServer {
+
+	pub fn new(addr: &Path) -> Result<UnixServer, io::Error> {
+		let listener = UnixListener::bind(addr)?;
+		Ok( UnixServer {
+			listener,
+			connections: Slab::new()
+		})
+	}
+	
+	
+}
+
+impl super::Server for UnixServer {
+
+	fn accept_pending_connections(&mut self) -> Vec<usize> {
+		let mut new_connections = Vec::new();
+		loop {
+			match self.listener.accept() {
+				Ok(Some((stream, _address))) => {
+					let con = StreamConnection::new(stream);
+					let id = self.connections.insert(con);
+					new_connections.push(id);
+				}
+				Ok(None) => {
+					break;
+				}
+				Err(_e) => {
+					break;
+				}
+			}
+		}
+		new_connections
+	}
+
+
+	fn recv_pending_messages(&mut self) -> (Vec<(usize, String)>, Vec<usize>){
+	// 	let mut buf = [0; 2048];
+		let mut messages: Vec<(usize, String)> = Vec::new();
+		let mut to_remove = Vec::new();
+		for (key, connection) in self.connections.iter_mut(){
+			match connection.read() {
+				Err(_e) => {
+					to_remove.push(key);
+				}
+				Ok((con_messages, closed)) => {
+					for message in con_messages {
+						messages.push((key, message));
+					}
+					if closed {
+						to_remove.push(key);
+					}
+				}
+			}
+		}
+		for key in to_remove.iter() {
+			self.connections.remove(*key);
+		}
+		(messages, to_remove)
+	}
+
+	fn broadcast(&mut self, text: &str) {
+		for (_id, conn) in self.connections.iter_mut() {
+			let _ = conn.send(text);
+		}
+	}
+	
+	fn send(&mut self, id: usize, text: &str) -> Result<(), io::Error> {
+		match self.connections.get_mut(id){
+			Some(conn) => {
+				conn.send(text)
+			}
+			None => Err(io::Error::new(io::ErrorKind::Other, "index is empty"))
+		}
+	}
+	
+	
+	fn get_name(&self, id: usize) -> Option<String> {
+		let connection = self.connections.get(id)?;
+		let fd = connection.stream.as_raw_fd();
+		if let Ok(peercred) = getsockopt(fd, sockopt::PeerCredentials) {
+			let uid = peercred.uid();
+			let user = users::get_user_by_uid(uid)?;
+			let name = user.name();
+			Some(name.to_string_lossy().to_string())
+		} else { None }
+	}
+
+}
+