81 lines
2.6 KiB
Nim
81 lines
2.6 KiB
Nim
## Nim-LibP2P
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## Copyright (c) 2021 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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import std/[options, sequtils]
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import pkg/[chronos, chronicles, metrics]
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import ../stream/connection,
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../protocols/secure/secure,
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../protocols/identify,
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../multistream,
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../connmanager
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export connmanager, connection, identify, secure, multistream
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declarePublicCounter(libp2p_failed_upgrade, "peers failed upgrade")
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type
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UpgradeFailedError* = object of CatchableError
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Upgrade* = ref object of RootObj
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ms*: MultistreamSelect
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identity*: Identify
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connManager*: ConnManager
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secureManagers*: seq[Secure]
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method upgradeIncoming*(u: Upgrade, conn: Connection): Future[void] {.base.} =
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doAssert(false, "Not implemented!")
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method upgradeOutgoing*(u: Upgrade, conn: Connection): Future[Connection] {.base.} =
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doAssert(false, "Not implemented!")
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proc secure*(u: Upgrade, conn: Connection): Future[Connection] {.async, gcsafe.} =
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if u.secureManagers.len <= 0:
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raise newException(UpgradeFailedError, "No secure managers registered!")
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let codec = await u.ms.select(conn, u.secureManagers.mapIt(it.codec))
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if codec.len == 0:
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raise newException(UpgradeFailedError, "Unable to negotiate a secure channel!")
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trace "Securing connection", conn, codec
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let secureProtocol = u.secureManagers.filterIt(it.codec == codec)
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# ms.select should deal with the correctness of this
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# let's avoid duplicating checks but detect if it fails to do it properly
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doAssert(secureProtocol.len > 0)
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return await secureProtocol[0].secure(conn, true)
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proc identify*(u: Upgrade, conn: Connection) {.async, gcsafe.} =
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## identify the connection
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if (await u.ms.select(conn, u.identity.codec)):
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let info = await u.identity.identify(conn, conn.peerInfo)
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if info.pubKey.isNone and isNil(conn):
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raise newException(UpgradeFailedError,
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"no public key provided and no existing peer identity found")
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if isNil(conn.peerInfo):
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conn.peerInfo = PeerInfo.init(info.pubKey.get())
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if info.addrs.len > 0:
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conn.peerInfo.addrs = info.addrs
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if info.agentVersion.isSome:
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conn.peerInfo.agentVersion = info.agentVersion.get()
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if info.protoVersion.isSome:
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conn.peerInfo.protoVersion = info.protoVersion.get()
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if info.protos.len > 0:
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conn.peerInfo.protocols = info.protos
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trace "identified remote peer", conn, peerInfo = shortLog(conn.peerInfo)
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