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wip: interop testing

This commit is contained in:
Dmitriy Ryajov 2019-09-06 01:13:47 -06:00
parent 8cd1b71781
commit ba843f4091
2 changed files with 104 additions and 69 deletions
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135
libp2p/switch.nim
View File

@ -9,11 +9,16 @@
import tables, sequtils, options, strformat
import chronos
import connection, transport,
import connection,
transports/transport,
stream/lpstream,
multistream, protocol,
peerinfo, multiaddress,
identify, muxers/muxer,
multistream,
protocols/protocol,
protocols/secure,
peerinfo,
multiaddress,
protocols/identify,
muxers/muxer,
peer
type
@ -26,63 +31,55 @@ type
muxers*: Table[string, MuxerProvider]
ms*: MultisteamSelect
identity*: Identify
streamHandler*: StreamHandler
secureManager*: Secure
proc handleConn(s: Switch, conn: Connection): Future[Connection] {.async, gcsafe.}
proc newSwitch*(peerInfo: PeerInfo,
transports: seq[Transport],
identity: Identify,
muxers: Table[string, MuxerProvider]): Switch =
new result
result.peerInfo = peerInfo
result.ms = newMultistream()
result.transports = transports
result.connections = newTable[string, Connection]()
result.muxed = newTable[string, Muxer]()
result.identity = identity
result.muxers = muxers
result.ms.addHandler(IdentifyCodec, identity)
proc secure(s: Switch, conn: Connection) {.async, gcsafe.} =
proc secure(s: Switch, conn: Connection): Future[Connection] {.async, gcsafe.} =
## secure the incoming connection
discard
# plaintext for now, doesn't do anything
if not (await s.ms.select(conn, s.secureManager.codec)):
raise newException(CatchableError, "Unable to negotiate a secure channel!")
result = conn
proc identify(s: Switch, conn: Connection) {.async, gcsafe.} =
## identify the connection
s.peerInfo.protocols = await s.ms.list(conn) # update protos before engagin in identify
# s.peerInfo.protocols = await s.ms.list(conn) # update protos before engagin in identify
try:
if (await s.ms.select(conn, s.identity.codec)):
let info = await s.identity.identify(conn, conn.peerInfo)
let id = if conn.peerInfo.isSome: conn.peerInfo.get().peerId.pretty else: ""
if s.connections.contains(id):
let id = if conn.peerInfo.isSome:
conn.peerInfo.get().peerId.pretty
else:
""
if id.len > 0 and s.connections.contains(id):
let connection = s.connections[id]
var peerInfo = conn.peerInfo.get()
peerInfo.peerId = PeerID.init(info.pubKey) # we might not have a peerId at all
peerInfo.addrs = info.addrs
peerInfo.protocols = info.protos
except IdentityInvalidMsgError as exc:
echo exc.msg # TODO: Loging
except IdentityNoMatchError as exc:
echo exc.msg # TODO: Loging
proc mux(s: Switch, conn: Connection): Future[void] {.async, gcsafe.} =
proc mux(s: Switch, conn: Connection): Future[Connection] {.async, gcsafe.} =
## mux incoming connection
let muxers = toSeq(s.muxers.keys)
let muxerName = await s.ms.select(conn, muxers)
if muxerName.len == 0:
if muxerName.len == 0 or muxerName == "na":
return
let muxer = s.muxers[muxerName].newMuxer(conn)
# install stream handler
muxer.streamHandler = proc (stream: Connection) {.async, gcsafe.} =
try:
# TODO: figure out proper way of handling this.
# Perhaps it's ok to discard this Future and handle
# errors elsewere?
asyncCheck s.ms.handle(stream) # handle incoming connection
finally:
await stream.close()
muxer.streamHandler = s.streamHandler
# do identify first, so that we have a
# PeerInfo in case we didn't before
let stream = await muxer.newStream()
await s.identify(stream)
result = await muxer.newStream()
# await s.identify(result)
# store it in muxed connections if we have a peer for it
# TODO: We should make sure that this are cleaned up properly
@ -93,20 +90,20 @@ proc mux(s: Switch, conn: Connection): Future[void] {.async, gcsafe.} =
s.muxed[conn.peerInfo.get().peerId.pretty] = muxer
proc handleConn(s: Switch, conn: Connection): Future[Connection] {.async, gcsafe.} =
result = conn
## perform upgrade flow
if conn.peerInfo.isSome:
let id = conn.peerInfo.get().peerId.pretty
if result.peerInfo.isSome:
let id = result.peerInfo.get().peerId.pretty
if s.connections.contains(id):
# if we already have a connection for this peer,
# close the incoming connection and return the
# existing one
await conn.close()
await result.close()
return s.connections[id]
s.connections[id] = conn
s.connections[id] = result
await s.secure(conn) # secure the connection
# await s.mux(conn) # mux it if possible
result = conn
result = await s.secure(conn) # secure the connection
result = await s.mux(result) # mux it if possible
proc cleanupConn(s: Switch, conn: Connection) {.async, gcsafe.} =
let id = if conn.peerInfo.isSome: conn.peerInfo.get().peerId.pretty else: ""
@ -124,21 +121,21 @@ proc dial*(s: Switch,
for t in s.transports: # for each transport
for a in peer.addrs: # for each address
if t.handles(a): # check if it can dial it
var conn = await t.dial(a)
conn = await s.handleConn(conn)
result = await t.dial(a)
result.peerInfo = some(peer)
result = await s.handleConn(result)
if s.muxed.contains(peer.peerId.pretty):
conn = await s.muxed[peer.peerId.pretty].newStream()
if (await s.ms.select(conn, proto)).len == 0:
result = await s.muxed[peer.peerId.pretty].newStream()
if (await s.ms.select(result, proto)):
raise newException(CatchableError,
&"Unable to select protocol: {proto}")
result = conn
proc mount*[T: LPProtocol](s: Switch, proto: T) =
proc mount*[T: LPProtocol](s: Switch, proto: T) {.gcsafe.} =
if isNil(proto.handler):
raise newException(CatchableError,
"Protocol has to define a handle method or proc")
if len(proto.codec) <= 0:
if proto.codec.len == 0:
raise newException(CatchableError,
"Protocol has to define a codec string")
@ -147,10 +144,8 @@ proc mount*[T: LPProtocol](s: Switch, proto: T) =
proc start*(s: Switch) {.async.} =
proc handle(conn: Connection): Future[void] {.async, closure, gcsafe.} =
try:
# TODO: figure out proper way of handling this.
# Perhaps it's ok to discard this Future and handle
# errors elsewere?
asyncCheck s.ms.handle(conn) # handle incoming connection
if (await s.ms.select(conn)):
await s.ms.handle(conn) # handle incoming connection
except:
await s.cleanupConn(conn)
@ -161,3 +156,31 @@ proc start*(s: Switch) {.async.} =
proc stop*(s: Switch) {.async.} =
await allFutures(s.transports.mapIt(it.close()))
proc newSwitch*(peerInfo: PeerInfo,
transports: seq[Transport],
identity: Identify,
muxers: Table[string, MuxerProvider]): Switch =
new result
result.peerInfo = peerInfo
result.ms = newMultistream()
result.transports = transports
result.connections = newTable[string, Connection]()
result.muxed = newTable[string, Muxer]()
result.identity = identity
result.muxers = muxers
let s = result # can't capture result
result.streamHandler = proc(stream: Connection) {.async, gcsafe.} =
# TODO: figure out proper way of handling this.
# Perhaps it's ok to discard this Future and handle
# errors elsewere?
await s.ms.handle(stream) # handle incoming connection
result.mount(identity)
for key, val in muxers:
val.streamHandler = result.streamHandler
result.mount(val)
result.secureManager = Secure(newPlainText())
result.mount(result.secureManager)

26
tests/testswitch.nim
View File

@ -1,11 +1,16 @@
import unittest, tables
import chronos
import ../libp2p/switch, ../libp2p/multistream,
../libp2p/identify, ../libp2p/connection,
../libp2p/transport, ../libp2p/tcptransport,
../libp2p/multiaddress, ../libp2p/peerinfo,
../libp2p/crypto/crypto, ../libp2p/peer,
../libp2p/protocol, ../libp2p/muxers/muxer,
import ../libp2p/switch,
../libp2p/multistream,
../libp2p/protocols/identify,
../libp2p/connection,
../libp2p/transports/[transport, tcptransport],
../libp2p/multiaddress,
../libp2p/peerinfo,
../libp2p/crypto/crypto,
../libp2p/peer,
../libp2p/protocols/protocol,
../libp2p/muxers/muxer,
../libp2p/muxers/mplex/mplex,
../libp2p/muxers/mplex/types
@ -17,6 +22,7 @@ type
method init(p: TestProto) {.gcsafe.} =
proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
let msg = cast[string](await conn.readLp())
echo msg
check "Hello!" == msg
await conn.writeLp("Hello!")
@ -43,7 +49,7 @@ suite "Switch":
proc testSwitch(): Future[bool] {.async, gcsafe.} =
let ma1: MultiAddress = Multiaddress.init("/ip4/127.0.0.1/tcp/53370")
let ma2: MultiAddress = Multiaddress.init("/ip4/127.0.0.1/tcp/53381")
let ma2: MultiAddress = Multiaddress.init("/ip4/127.0.0.1/tcp/53371")
var peerInfo1, peerInfo2: PeerInfo
var switch1, switch2: Switch
@ -58,11 +64,17 @@ suite "Switch":
(switch2, peerInfo2) = createSwitch(ma2)
await switch2.start()
let conn = await switch2.dial(peerInfo1, TestCodec)
echo "DIALED???"
echo conn.repr
await conn.writeLp("Hello!")
echo "WROTE FROM TEST"
echo conn.repr
let msg = cast[string](await conn.readLp())
echo msg
check "Hello!" == msg
result = true
await allFutures(switch1.stop(), switch2.stop())
check:
waitFor(testSwitch()) == true