nim-libp2p/libp2p/tcptransport.nim

67 lines
2.2 KiB
Nim

## Nim-LibP2P
## Copyright (c) 2018 Status Research & Development GmbH
## Licensed under either of
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
## at your option.
## This file may not be copied, modified, or distributed except according to
## those terms.
import chronos
import transport, wire, connection,
multiaddress, connection,
multicodec, stream/chronosstream
type TcpTransport* = ref object of Transport
server*: StreamServer
proc connHandler*(t: Transport,
server: StreamServer,
client: StreamTransport):
Future[Connection] {.async, gcsafe.} =
let conn: Connection = newConnection(newChronosStream(server, client))
let handlerFut = if t.handler == nil: nil else: t.handler(conn)
let connHolder: ConnHolder = ConnHolder(connection: conn,
connFuture: handlerFut)
t.connections.add(connHolder)
result = conn
proc connCb(server: StreamServer,
client: StreamTransport) {.async, gcsafe.} =
let t: Transport = cast[Transport](server.udata)
discard t.connHandler(server, client)
method init*(t: TcpTransport) =
t.multicodec = multiCodec("tcp")
method close*(t: TcpTransport): Future[void] {.async, gcsafe.} =
## start the transport
await procCall Transport(t).close() # call base
t.server.stop()
await t.server.closeWait()
method listen*(t: TcpTransport,
ma: MultiAddress,
handler: ConnHandler):
Future[void] {.async, gcsafe.} =
await procCall Transport(t).listen(ma, handler) # call base
## listen on the transport
let listenFuture: Future[void] = newFuture[void]()
result = listenFuture
let server = createStreamServer(t.ma, connCb, {}, t)
t.server = server
server.start()
listenFuture.complete()
method dial*(t: TcpTransport,
address: MultiAddress):
Future[Connection] {.async, gcsafe.} =
## dial a peer
let client: StreamTransport = await connect(address)
result = await t.connHandler(t.server, client)
method handles*(t: TcpTransport, address: MultiAddress): bool {.gcsafe.} = true