97 lines
2.9 KiB
Nim
97 lines
2.9 KiB
Nim
# Nim-LibP2P
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# Copyright (c) 2022 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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when (NimMajor, NimMinor) < (1, 4):
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{.push raises: [Defect].}
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else:
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{.push raises: [].}
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import std/[options, sequtils, strutils]
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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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../peerstore,
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../connmanager,
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../errors,
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../utility
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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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logScope:
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topics = "libp2p upgrade"
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type
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UpgradeFailedError* = object of LPError
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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*(
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self: Upgrade,
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conn: Connection): Future[void] {.base.} =
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doAssert(false, "Not implemented!")
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method upgradeOutgoing*(
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self: Upgrade,
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conn: Connection): Future[Connection] {.base.} =
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doAssert(false, "Not implemented!")
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proc secure*(
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self: Upgrade,
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conn: Connection): Future[Connection] {.async, gcsafe.} =
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if self.secureManagers.len <= 0:
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raise newException(UpgradeFailedError, "No secure managers registered!")
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let codec = await self.ms.select(conn, self.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 = self.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*(
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self: Upgrade,
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conn: Connection) {.async, gcsafe.} =
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## identify the connection
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if (await self.ms.select(conn, self.identity.codec)):
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let
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info = await self.identity.identify(conn, conn.peerId)
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peerStore = self.connManager.peerStore
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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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conn.peerId = info.peerId
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when defined(libp2p_agents_metrics):
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conn.shortAgent = "unknown"
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if info.agentVersion.isSome and info.agentVersion.get().len > 0:
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let shortAgent = info.agentVersion.get().split("/")[0].safeToLowerAscii()
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if shortAgent.isOk() and KnownLibP2PAgentsSeq.contains(shortAgent.get()):
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conn.shortAgent = shortAgent.get()
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peerStore.updatePeerInfo(info)
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trace "identified remote peer", conn, peerId = shortLog(conn.peerId)
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