104 lines
3.3 KiB
Nim
104 lines
3.3 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 chronos
|
|
import protobuf/minprotobuf, peerinfo,
|
|
switchtypes, protocol, connection,
|
|
peer, crypto/crypto, multiaddress
|
|
|
|
const IdentifyCodec = "/ipfs/id/1.0.0"
|
|
const IdentifyPushCodec = "/ipfs/id/push/1.0.0"
|
|
const ProtoVersion = "ipfs/0.1.0"
|
|
const AgentVersion = "nim-libp2p/0.0.1"
|
|
|
|
type
|
|
# TODO: we're doing protobuf manualy, this is only temporary
|
|
ProtoField[T] = object
|
|
index: int
|
|
field: T
|
|
|
|
IdentifyInfo = object
|
|
peerInfo: PeerInfo
|
|
observedAddr: MultiAddress
|
|
protoVersion: string
|
|
agentVersion: string
|
|
|
|
Identify = ref object of switchtypes.Protocol
|
|
|
|
proc encodeIdentifyMsg(p: Identify, observedAddrs: Multiaddress): ProtoBuffer =
|
|
result = initProtoBuffer({WithVarintLength})
|
|
var pubKey: PublicKey
|
|
if p.peerInfo.peerId.extractPublicKey(pubkey) != true:
|
|
raise newException(CatchableError, "unable to extract public key")
|
|
|
|
result.write(initProtoField(1, pubKey))
|
|
for ma in p.peerInfo.addrs:
|
|
result.write(initProtoField(2, ma.data.buffer))
|
|
|
|
for item in p.peerInfo.protocols:
|
|
result.write(initProtoField(3, item))
|
|
|
|
result.write(initProtoField(4, observedAddrs.data.buffer))
|
|
|
|
let protoVersion = ProtoVersion
|
|
result.write(initProtoField(5, protoVersion))
|
|
|
|
let agentVersion = AgentVersion
|
|
result.write(initProtoField(6, agentVersion))
|
|
|
|
result.finish()
|
|
|
|
proc getPeerInfo(pb: var ProtoBuffer): PeerInfo =
|
|
## Get PeerInfo object from ``pb``.
|
|
result.addrs = newSeq[MultiAddress]()
|
|
if pb.getValue(1, result.peerId) == -1:
|
|
raise newException(CatchableError, "Missing required field `publicKey`!")
|
|
var address = newSeq[byte]()
|
|
while pb.getBytes(2, address) != -1:
|
|
if len(address) != 0:
|
|
var copyaddr = address
|
|
result.addrs.add(MultiAddress.init(copyaddr))
|
|
address.setLen(0)
|
|
|
|
proc decodeIdentifyMsg(p: Identify, buf: seq[byte]): IdentifyInfo =
|
|
var pb = initProtoBuffer(buf)
|
|
result.peerInfo = pb.getPeerInfo()
|
|
|
|
var proto = ""
|
|
var protos: seq[string] = newSeq[string]()
|
|
while pb.getString(3, proto) > 0:
|
|
protos.add(proto)
|
|
proto = "" # TODO: do i need to clear it up?
|
|
|
|
var observableAddr = newSeq[byte]()
|
|
if pb.getBytes(4, observableAddr) > 0: # attempt to read the observed addr
|
|
result.observedAddr = MultiAddress.init(observableAddr)
|
|
|
|
result.protoVersion = ""
|
|
if pb.getString(5, result.protoVersion) <= 0:
|
|
raise newException(CatchableError, "Unable to read protocol version")
|
|
|
|
var agentVersion = ""
|
|
if pb.getString(5, agentVersion) <= 0:
|
|
raise newException(CatchableError, "Unable to read agent version")
|
|
|
|
proc identify*(p: Identify,
|
|
conn: Connection,
|
|
observedAddres: MultiAddress): Future[IdentifyInfo] {.async.} =
|
|
var pb = p.encodeIdentifyMsg(observedAddres)
|
|
let length = pb.getLen()
|
|
await conn.write(pb.getPtr(), length)
|
|
var message = await conn.readLp()
|
|
if len(message) == 0:
|
|
raise newException(CatchableError, "Incorrect or empty message received!")
|
|
result = p.decodeIdentifyMsg(message)
|
|
|
|
|
|
method handle*(p: Identify, peerInfo: PeerInfo, handler: ProtoHandler) {.async.} = discard
|