openethereum/parity/whisper.rs

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use std::sync::Arc;
use std::io;
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use sync::{AttachedProtocol, ManageNetwork};
use parity_rpc::Metadata;
use parity_whisper::message::Message;
use parity_whisper::net::{self as whisper_net, Network as WhisperNetwork};
use parity_whisper::rpc::{WhisperClient, PoolHandle, FilterManager};
/// Whisper config.
#[derive(Debug, PartialEq, Eq)]
pub struct Config {
pub enabled: bool,
pub target_message_pool_size: usize,
}
impl Default for Config {
fn default() -> Self {
Config {
enabled: false,
target_message_pool_size: 10 * 1024 * 1024,
}
}
}
/// Standard pool handle.
pub struct NetPoolHandle {
/// Pool handle.
handle: Arc<WhisperNetwork<Arc<FilterManager>>>,
/// Network manager.
net: Arc<ManageNetwork>,
}
impl PoolHandle for NetPoolHandle {
fn relay(&self, message: Message) -> bool {
let mut res = false;
let mut message = Some(message);
self.net.with_proto_context(whisper_net::PROTOCOL_ID, &mut |ctx| {
if let Some(message) = message.take() {
res = self.handle.post_message(message, ctx);
}
});
res
}
fn pool_status(&self) -> whisper_net::PoolStatus {
self.handle.pool_status()
}
}
/// Factory for standard whisper RPC.
pub struct RpcFactory {
net: Arc<WhisperNetwork<Arc<FilterManager>>>,
manager: Arc<FilterManager>,
}
impl RpcFactory {
pub fn make_handler(&self, net: Arc<ManageNetwork>) -> WhisperClient<NetPoolHandle, Metadata> {
let handle = NetPoolHandle { handle: self.net.clone(), net: net };
WhisperClient::new(handle, self.manager.clone())
}
}
/// Sets up whisper protocol and RPC handler.
///
/// Will target the given pool size.
#[cfg(not(feature = "ipc"))]
pub fn setup(target_pool_size: usize, protos: &mut Vec<AttachedProtocol>)
-> io::Result<Option<RpcFactory>>
{
let manager = Arc::new(FilterManager::new()?);
let net = Arc::new(WhisperNetwork::new(target_pool_size, manager.clone()));
protos.push(AttachedProtocol {
handler: net.clone() as Arc<_>,
versions: whisper_net::SUPPORTED_VERSIONS,
protocol_id: whisper_net::PROTOCOL_ID,
});
// parity-only extensions to whisper.
protos.push(AttachedProtocol {
handler: Arc::new(whisper_net::ParityExtensions),
versions: whisper_net::SUPPORTED_VERSIONS,
protocol_id: whisper_net::PARITY_PROTOCOL_ID,
});
let factory = RpcFactory { net: net, manager: manager };
Ok(Some(factory))
}
// TODO: make it possible to attach generic protocols in IPC.
#[cfg(feature = "ipc")]
pub fn setup(_target_pool_size: usize, _protos: &mut Vec<AttachedProtocol>)
-> io::Result<Option<RpcFactory>>
{
Ok(None)
}