93 lines
2.9 KiB
Nim
93 lines
2.9 KiB
Nim
## Nim-LibP2P
|
|
## Copyright (c) 2019 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, chronicles, sequtils
|
|
import transport,
|
|
../wire,
|
|
../connection,
|
|
../multiaddress,
|
|
../multicodec,
|
|
../stream/chronosstream
|
|
|
|
logScope:
|
|
topic = "TcpTransport"
|
|
|
|
type TcpTransport* = ref object of Transport
|
|
server*: StreamServer
|
|
|
|
proc cleanup(t: Transport, conn: Connection) {.async.} =
|
|
await conn.closeEvent.wait()
|
|
t.connections.keepItIf(it != conn)
|
|
|
|
proc connHandler*(t: Transport,
|
|
server: StreamServer,
|
|
client: StreamTransport,
|
|
initiator: bool = false):
|
|
Future[Connection] {.async, gcsafe.} =
|
|
trace "handling connection for", address = $client.remoteAddress
|
|
let conn: Connection = newConnection(newChronosStream(server, client))
|
|
conn.observedAddrs = MultiAddress.init(client.remoteAddress)
|
|
if not initiator:
|
|
if not isNil(t.handler):
|
|
asyncCheck t.handler(conn)
|
|
|
|
t.connections.add(conn)
|
|
asyncCheck t.cleanup(conn)
|
|
|
|
result = conn
|
|
|
|
proc connCb(server: StreamServer,
|
|
client: StreamTransport) {.async, gcsafe.} =
|
|
trace "incomming connection for", address = $client.remoteAddress
|
|
let t: Transport = cast[Transport](server.udata)
|
|
asyncCheck t.connHandler(server, client)
|
|
|
|
method init*(t: TcpTransport) =
|
|
t.multicodec = multiCodec("tcp")
|
|
|
|
method close*(t: TcpTransport): Future[void] {.async, gcsafe.} =
|
|
## start the transport
|
|
trace "stopping transport"
|
|
await procCall Transport(t).close() # call base
|
|
|
|
# server can be nil
|
|
if not isNil(t.server):
|
|
t.server.stop()
|
|
t.server.close()
|
|
await t.server.join()
|
|
|
|
trace "transport stopped"
|
|
|
|
method listen*(t: TcpTransport,
|
|
ma: MultiAddress,
|
|
handler: ConnHandler):
|
|
Future[Future[void]] {.async, gcsafe.} =
|
|
discard await procCall Transport(t).listen(ma, handler) # call base
|
|
|
|
## listen on the transport
|
|
t.server = createStreamServer(t.ma, connCb, {}, t)
|
|
t.server.start()
|
|
|
|
# always get the resolved address in case we're bound to 0.0.0.0:0
|
|
t.ma = MultiAddress.init(t.server.sock.getLocalAddress())
|
|
result = t.server.join()
|
|
trace "started node on", address = t.ma
|
|
|
|
method dial*(t: TcpTransport,
|
|
address: MultiAddress):
|
|
Future[Connection] {.async, gcsafe.} =
|
|
trace "dialing remote peer", address = $address
|
|
## dial a peer
|
|
let client: StreamTransport = await connect(address)
|
|
result = await t.connHandler(t.server, client, true)
|
|
|
|
method handles*(t: TcpTransport, address: MultiAddress): bool {.gcsafe.} =
|
|
if procCall Transport(t).handles(address):
|
|
result = address.protocols.filterIt( it == multiCodec("tcp") ).len > 0
|