nim-libp2p/libp2p/transport.nim

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## 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.
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import sequtils
import chronos
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import peerinfo, connection, multiaddress, multicodec
type
ConnHandler* = proc (conn: Connection): Future[void] {.gcsafe.}
ConnHolder* = object
connection*: Connection
connFuture*: Future[void]
Transport* = ref object of RootObj
ma*: Multiaddress
connections*: seq[ConnHolder]
handler*: ConnHandler
multicodec*: MultiCodec
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method init*(t: Transport) {.base, gcsafe.} =
## perform protocol initialization
discard
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proc newTransport*(t: typedesc[Transport]): t {.gcsafe.} =
new result
result.init()
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method close*(t: Transport) {.base, async, gcsafe.} =
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## stop and cleanup the transport
## including all outstanding connections
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await allFutures(t.connections.mapIt(it.connection.close()))
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method listen*(t: Transport,
ma: MultiAddress,
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handler: ConnHandler) {.base, async, gcsafe.} =
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## listen for incoming connections
t.ma = ma
t.handler = handler
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method dial*(t: Transport,
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address: MultiAddress):
Future[Connection] {.base, async, gcsafe.} =
## dial a peer
discard
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method upgrade*(t: Transport) {.base, async, gcsafe.} =
## base upgrade method that the transport uses to perform
## transport specific upgrades
discard
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method handles*(t: Transport, address: MultiAddress): bool {.base, gcsafe.} =
## check if transport supportes the multiaddress
# TODO: this should implement generic logic that would use the multicodec
# declared in the multicodec field and set by each individual transport
discard