nim-eth/tests/utp/test_utils.nim

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import
chronos,
../../eth/utp/utp_socket,
../../eth/utp/packets,
../../eth/keys
type AssertionCallback = proc(): bool {.gcsafe, raises: [Defect].}
let testBufferSize = 1024'u32
let defaultRcvOutgoingId = 314'u16
proc waitUntil*(f: AssertionCallback): Future[void] {.async.} =
while true:
let res = f()
if res:
break
else:
await sleepAsync(milliseconds(50))
template connectOutGoingSocket*(
initialRemoteSeq: uint16,
q: AsyncQueue[Packet],
remoteReceiveBuffer: uint32 = testBufferSize,
cfg: SocketConfig = SocketConfig.init()): (UtpSocket[TransportAddress], Packet) =
let sock1 = newOutgoingSocket[TransportAddress](testAddress, initTestSnd(q), cfg, defaultRcvOutgoingId, rng[])
asyncSpawn sock1.startOutgoingSocket()
let initialPacket = await q.get()
check:
initialPacket.header.pType == ST_SYN
let responseAck =
ackPacket(
initialRemoteSeq,
initialPacket.header.connectionId,
initialPacket.header.seqNr,
remoteReceiveBuffer,
0
)
await sock1.processPacket(responseAck)
await waitUntil(proc (): bool = sock1.isConnected())
check:
sock1.isConnected()
(sock1, initialPacket)
template connectOutGoingSocketWithIncoming*(
initialRemoteSeq: uint16,
outgoingQueue: AsyncQueue[Packet],
incomingQueue: AsyncQueue[Packet],
remoteReceiveBuffer: uint32 = testBufferSize,
cfg: SocketConfig = SocketConfig.init()): (UtpSocket[TransportAddress], UtpSocket[TransportAddress]) =
let outgoingSocket = newOutgoingSocket[TransportAddress](testAddress, initTestSnd(outgoingQueue), cfg, defaultRcvOutgoingId, rng[])
asyncSpawn outgoingSocket.startOutgoingSocket()
let initialPacket = await outgoingQueue.get()
check:
initialPacket.header.pType == ST_SYN
let incomingSocket = newIncomingSocket[TransportAddress](
testAddress,
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initTestSnd(incomingQueue),
cfg,
initialPacket.header.connectionId,
initialPacket.header.seqNr,
rng[]
)
incomingSocket.startIncomingSocket()
let responseAck = await incomingQueue.get()
await outgoingSocket.processPacket(responseAck)
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await waitUntil(proc (): bool = outgoingSocket.isConnected())
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check:
outgoingSocket.isConnected()
(outgoingSocket, incomingSocket)
proc generateDataPackets*(
numberOfPackets: uint16,
initialSeqNr: uint16,
connectionId: uint16,
ackNr: uint16,
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rng: var HmacDrbgContext): seq[Packet] =
let packetSize = 100
var packets = newSeq[Packet]()
var i = 0'u16
while i < numberOfPackets:
let packet = dataPacket(
initialSeqNr + i,
connectionId,
ackNr,
testBufferSize,
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rng.generateBytes(packetSize),
0
)
packets.add(packet)
inc i
packets
proc initTestSnd*(q: AsyncQueue[Packet]): SendCallback[TransportAddress]=
return (
proc (to: TransportAddress, bytes: seq[byte]): Future[void] =
let p = decodePacket(bytes).get()
q.addLast(p)
)