     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81

    use std::io;
    use std::time::Duration;
    use std::net::SocketAddr;
    use futures::{Future, Poll, Async};
    use tokio_core::reactor::Handle;
    use tokio_core::net::{TcpStream, TcpStreamNew};
    use network::Magic;
    use message::Error;
    use message::types::Version;
    use io::{handshake, Handshake, Deadline, deadline};
    use net::{Config, Connection};

    pub fn connect(address: &SocketAddr, handle: &Handle, config: &Config) -> Deadline<Connect> {
    	let connect = Connect {
    		state: ConnectState::TcpConnect {
    			future: TcpStream::connect(address, handle),
    			version: Some(config.version(address)),
    		},
    		magic: config.magic,
    		address: *address,
    		protocol_minimum: config.protocol_minimum,
    	};

    	deadline(Duration::new(5, 0), handle, connect).expect("Failed to create timeout")
    }

    enum ConnectState {
    	TcpConnect {
    		future: TcpStreamNew,
    		version: Option<Version>,
    	},
    	Handshake(Handshake<TcpStream>),
    	Connected,
    }

    pub struct Connect {
    	state: ConnectState,
    	magic: Magic,
    	address: SocketAddr,
    	protocol_minimum: u32,
    }

    impl Future for Connect {
    	type Item = Result<Connection, Error>;
    	type Error = io::Error;

    	fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
    		let (next, result) = match self.state {
    			ConnectState::TcpConnect { ref mut future, ref mut version } => {
    				let stream = try_ready!(future.poll());
    				let version = version.take().expect("state TcpConnect must have version");
    				let handshake = handshake(stream, self.magic, version, self.protocol_minimum);
    				(ConnectState::Handshake(handshake), Async::NotReady)
    			},
    			ConnectState::Handshake(ref mut future) => {
    				let (stream, result) = try_ready!(future.poll());
    				let result = match result {
    					Ok(result) => result,
    					Err(err) => return Ok(Async::Ready(Err(err))),
    				};
    				let connection = Connection {
    					stream: stream.into(),
    					services: result.version.services(),
    					version: result.negotiated_version,
    					version_message: result.version,
    					magic: self.magic,
    					address: self.address,
    				};
    				(ConnectState::Connected, Async::Ready(Ok(connection)))
    			},
    			ConnectState::Connected => panic!("poll Connect after it's done"),
    		};

    		self.state = next;
    		match result {
    			// by polling again, we register new future
    			Async::NotReady => self.poll(),
    			result => Ok(result)
    		}
    	}
    }

# Help

## Keyboard Shortcuts

`?`
  Show this help dialog
`S`
  Focus the search field
`↑`
  Move up in search results
`↓`
  Move down in search results
`↹`
  Switch tab
`⏎`
  Go to active search result
`+`
  Expand all sections
`-`
  Collapse all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)

Search multiple things at once by splitting your query with comma (e.g. `str,u8` or `String,struct:Vec,test`)