## 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 sequtils import chronos, chronicles import ../stream/connection, ../multiaddress, ../multicodec type TransportClosedError* = object of CatchableError Transport* = ref object of RootObj ma*: Multiaddress multicodec*: MultiCodec running*: bool proc newTransportClosedError*(parent: ref Exception = nil): ref CatchableError = newException(TransportClosedError, "Transport closed, no more connections!", parent) method initTransport*(t: Transport) {.base, gcsafe, locks: "unknown".} = ## perform protocol initialization ## discard method start*(t: Transport, ma: MultiAddress) {.base, async.} = ## start the transport ## t.ma = ma trace "starting transport", address = $ma method stop*(t: Transport) {.base, async.} = ## stop and cleanup the transport ## including all outstanding connections ## discard method accept*(t: Transport): Future[Connection] {.base, async, gcsafe.} = ## accept incoming connections ## discard method dial*(t: Transport, address: MultiAddress): Future[Connection] {.base, async, gcsafe.} = ## dial a peer ## discard method upgrade*(t: Transport) {.base, async, gcsafe.} = ## base upgrade method that the transport uses to perform ## transport specific upgrades ## discard method handles*(t: Transport, address: MultiAddress): bool {.base, gcsafe.} = ## check if transport supports the multiaddress ## # by default we skip circuit addresses to avoid # having to repeat the check in every transport address.protocols.tryGet().filterIt( it == multiCodec("p2p-circuit") ).len == 0 method localAddress*(t: Transport): MultiAddress {.base, gcsafe.} = ## get the local address of the transport in case started with 0.0.0.0:0 ## discard