nim-libp2p/libp2p/switch.nim

50 lines
1.6 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 tables
import chronos
import connection, transport, stream,
multistreamselect, protocol,
peerinfo, multiaddress
type
Switch* = ref object of RootObj
peerInfo*: PeerInfo
connections*: TableRef[string, Connection]
transports*: seq[Transport]
protocols*: seq[LPProtocol]
ms*: MultisteamSelect
proc newSwitch*(peerInfo: PeerInfo, transports: seq[Transport]): Switch =
new result
result.peerInfo = peerInfo
result.ms = newMultistream()
result.transports = transports
result.protocols = newSeq[LPProtocol]()
result.connections = newTable[string, Connection]()
proc dial*(s: Switch, peer: PeerInfo, proto: string = ""): Future[Connection] {.async.} = discard
proc mount*(s: Switch, protocol: LPProtocol) = discard
proc start*(s: Switch) {.async.} =
# TODO: how bad is it that this is a closure?
proc handle(conn: Connection): Future[void] {.closure, gcsafe.} =
s.ms.handle(conn)
for t in s.transports: # for each transport
for a in s.peerInfo.addrs:
if t.handles(a): # check if it handles the multiaddr
await t.listen(a, handle) # listen for incoming connections
break
proc stop*(s: Switch) {.async.} =
for c in s.connections.values:
await c.close()