nim-libp2p/tests/testmultistream.nim

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import strutils, strformat, stew/byteutils
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import chronos
import ../libp2p/errors,
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../libp2p/multistream,
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../libp2p/stream/bufferstream,
../libp2p/stream/connection,
../libp2p/multiaddress,
../libp2p/transports/transport,
../libp2p/transports/tcptransport,
../libp2p/protocols/protocol,
../libp2p/upgrademngrs/upgrade
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import ./helpers
when defined(nimHasUsed): {.used.}
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## Mock stream for select test
type
TestSelectStream = ref object of Connection
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step*: int
method readOnce*(s: TestSelectStream,
pbytes: pointer,
nbytes: int): Future[int] {.async, gcsafe.} =
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case s.step:
of 1:
var buf = newSeq[byte](1)
buf[0] = 19
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 2
return buf.len
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of 2:
var buf = "/multistream/1.0.0\n"
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 3
return buf.len
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of 3:
var buf = newSeq[byte](1)
buf[0] = 18
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 4
return buf.len
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of 4:
var buf = "/test/proto/1.0.0\n"
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copyMem(pbytes, addr buf[0], buf.len())
return buf.len
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else:
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copyMem(pbytes,
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cstring("\0x3na\n"),
"\0x3na\n".len())
return "\0x3na\n".len()
method write*(s: TestSelectStream, msg: seq[byte]) {.async, gcsafe.} = discard
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method close(s: TestSelectStream) {.async, gcsafe.} =
s.isClosed = true
s.isEof = true
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proc newTestSelectStream(): TestSelectStream =
new result
result.step = 1
## Mock stream for handles `ls` test
type
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LsHandler = proc(procs: seq[byte]): Future[void] {.gcsafe.}
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TestLsStream = ref object of Connection
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step*: int
ls*: LsHandler
method readOnce*(s: TestLsStream,
pbytes: pointer,
nbytes: int):
Future[int] {.async.} =
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case s.step:
of 1:
var buf = newSeq[byte](1)
buf[0] = 19
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 2
return buf.len()
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of 2:
var buf = "/multistream/1.0.0\n"
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 3
return buf.len()
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of 3:
var buf = newSeq[byte](1)
buf[0] = 3
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 4
return buf.len()
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of 4:
var buf = "ls\n"
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copyMem(pbytes, addr buf[0], buf.len())
return buf.len()
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else:
var buf = "na\n"
copyMem(pbytes, addr buf[0], buf.len())
return buf.len()
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method write*(s: TestLsStream, msg: seq[byte]) {.async, gcsafe.} =
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if s.step == 4:
await s.ls(msg)
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method close(s: TestLsStream) {.async, gcsafe.} =
s.isClosed = true
s.isEof = true
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proc newTestLsStream(ls: LsHandler): TestLsStream {.gcsafe.} =
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new result
result.ls = ls
result.step = 1
## Mock stream for handles `na` test
type
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NaHandler = proc(procs: string): Future[void] {.gcsafe.}
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TestNaStream = ref object of Connection
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step*: int
na*: NaHandler
method readOnce*(s: TestNaStream,
pbytes: pointer,
nbytes: int):
Future[int] {.async, gcsafe.} =
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case s.step:
of 1:
var buf = newSeq[byte](1)
buf[0] = 19
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 2
return buf.len()
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of 2:
var buf = "/multistream/1.0.0\n"
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 3
return buf.len()
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of 3:
var buf = newSeq[byte](1)
buf[0] = 18
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copyMem(pbytes, addr buf[0], buf.len())
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s.step = 4
return buf.len()
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of 4:
var buf = "/test/proto/1.0.0\n"
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copyMem(pbytes, addr buf[0], buf.len())
return buf.len()
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else:
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copyMem(pbytes,
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cstring("\0x3na\n"),
"\0x3na\n".len())
return "\0x3na\n".len()
method write*(s: TestNaStream, msg: seq[byte]) {.async, gcsafe.} =
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if s.step == 4:
await s.na(string.fromBytes(msg))
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method close(s: TestNaStream) {.async, gcsafe.} =
s.isClosed = true
s.isEof = true
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proc newTestNaStream(na: NaHandler): TestNaStream =
new result
result.na = na
result.step = 1
suite "Multistream select":
teardown:
checkTrackers()
asyncTest "test select custom proto":
let ms = MultistreamSelect.new()
let conn = newTestSelectStream()
check (await ms.select(conn, @["/test/proto/1.0.0"])) == "/test/proto/1.0.0"
await conn.close()
asyncTest "test handle custom proto":
let ms = MultistreamSelect.new()
let conn = newTestSelectStream()
var protocol: LPProtocol = new LPProtocol
proc testHandler(conn: Connection,
proto: string):
Future[void] {.async, gcsafe.} =
check proto == "/test/proto/1.0.0"
await conn.close()
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protocol.handler = testHandler
ms.addHandler("/test/proto/1.0.0", protocol)
await ms.handle(conn)
asyncTest "test handle `ls`":
let ms = MultistreamSelect.new()
proc testLsHandler(proto: seq[byte]) {.async, gcsafe.} # forward declaration
let conn = Connection(newTestLsStream(testLsHandler))
let done = newFuture[void]()
proc testLsHandler(proto: seq[byte]) {.async, gcsafe.} =
var strProto: string = string.fromBytes(proto)
check strProto == "\x26/test/proto1/1.0.0\n/test/proto2/1.0.0\n"
await conn.close()
done.complete()
proc testHandler(conn: Connection, proto: string): Future[void]
{.async, gcsafe.} = discard
var protocol: LPProtocol = new LPProtocol
protocol.handler = testHandler
ms.addHandler("/test/proto1/1.0.0", protocol)
ms.addHandler("/test/proto2/1.0.0", protocol)
await ms.handle(conn)
await done.wait(5.seconds)
asyncTest "test handle `na`":
let ms = MultistreamSelect.new()
proc testNaHandler(msg: string): Future[void] {.async, gcsafe.}
let conn = newTestNaStream(testNaHandler)
proc testNaHandler(msg: string): Future[void] {.async, gcsafe.} =
echo msg
check msg == Na
await conn.close()
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var protocol: LPProtocol = new LPProtocol
proc testHandler(conn: Connection,
proto: string):
Future[void] {.async, gcsafe.} = discard
protocol.handler = testHandler
ms.addHandler("/unabvailable/proto/1.0.0", protocol)
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await ms.handle(conn)
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asyncTest "e2e - handle":
let ma: MultiAddress = Multiaddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
var protocol: LPProtocol = new LPProtocol
proc testHandler(conn: Connection,
proto: string):
Future[void] {.async, gcsafe.} =
check proto == "/test/proto/1.0.0"
await conn.writeLp("Hello!")
await conn.close()
protocol.handler = testHandler
let msListen = MultistreamSelect.new()
msListen.addHandler("/test/proto/1.0.0", protocol)
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let transport1 = TcpTransport.init(upgrade = Upgrade())
asyncCheck transport1.start(ma)
proc acceptHandler(): Future[void] {.async, gcsafe.} =
let conn = await transport1.accept()
await msListen.handle(conn)
await conn.close()
let handlerWait = acceptHandler()
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let msDial = MultistreamSelect.new()
let transport2 = TcpTransport.init(upgrade = Upgrade())
let conn = await transport2.dial(transport1.ma)
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check (await msDial.select(conn, "/test/proto/1.0.0")) == true
let hello = string.fromBytes(await conn.readLp(1024))
check hello == "Hello!"
await conn.close()
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await transport2.stop()
await transport1.stop()
await handlerWait.wait(30.seconds)
asyncTest "e2e - ls":
let ma: MultiAddress = Multiaddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
let
handlerWait = newFuture[void]()
let msListen = MultistreamSelect.new()
var protocol: LPProtocol = new LPProtocol
protocol.handler = proc(conn: Connection, proto: string) {.async, gcsafe.} =
# never reached
discard
proc testHandler(conn: Connection,
proto: string):
Future[void] {.async.} =
# never reached
discard
protocol.handler = testHandler
msListen.addHandler("/test/proto1/1.0.0", protocol)
msListen.addHandler("/test/proto2/1.0.0", protocol)
let transport1: TcpTransport = TcpTransport.init(upgrade = Upgrade())
let listenFut = transport1.start(ma)
proc acceptHandler(): Future[void] {.async, gcsafe.} =
let conn = await transport1.accept()
try:
await msListen.handle(conn)
except LPStreamEOFError:
discard
except LPStreamClosedError:
discard
finally:
await conn.close()
let acceptFut = acceptHandler()
let msDial = MultistreamSelect.new()
let transport2: TcpTransport = TcpTransport.init(upgrade = Upgrade())
let conn = await transport2.dial(transport1.ma)
let ls = await msDial.list(conn)
let protos: seq[string] = @["/test/proto1/1.0.0", "/test/proto2/1.0.0"]
check ls == protos
await conn.close()
await acceptFut
await transport2.stop()
await transport1.stop()
await listenFut.wait(5.seconds)
asyncTest "e2e - select one from a list with unsupported protos":
let ma: MultiAddress = Multiaddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
var protocol: LPProtocol = new LPProtocol
proc testHandler(conn: Connection,
proto: string):
Future[void] {.async, gcsafe.} =
check proto == "/test/proto/1.0.0"
await conn.writeLp("Hello!")
await conn.close()
protocol.handler = testHandler
let msListen = MultistreamSelect.new()
msListen.addHandler("/test/proto/1.0.0", protocol)
let transport1: TcpTransport = TcpTransport.init(upgrade = Upgrade())
asyncCheck transport1.start(ma)
proc acceptHandler(): Future[void] {.async, gcsafe.} =
let conn = await transport1.accept()
await msListen.handle(conn)
let acceptFut = acceptHandler()
let msDial = MultistreamSelect.new()
let transport2: TcpTransport = TcpTransport.init(upgrade = Upgrade())
let conn = await transport2.dial(transport1.ma)
check (await msDial.select(conn,
@["/test/proto/1.0.0", "/test/no/proto/1.0.0"])) == "/test/proto/1.0.0"
let hello = string.fromBytes(await conn.readLp(1024))
check hello == "Hello!"
await conn.close()
await acceptFut
await transport2.stop()
await transport1.stop()
asyncTest "e2e - select one with both valid":
let ma: MultiAddress = Multiaddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
var protocol: LPProtocol = new LPProtocol
proc testHandler(conn: Connection,
proto: string):
Future[void] {.async, gcsafe.} =
await conn.writeLp(&"Hello from {proto}!")
await conn.close()
protocol.handler = testHandler
let msListen = MultistreamSelect.new()
msListen.addHandler("/test/proto1/1.0.0", protocol)
msListen.addHandler("/test/proto2/1.0.0", protocol)
let transport1: TcpTransport = TcpTransport.init(upgrade = Upgrade())
asyncCheck transport1.start(ma)
proc acceptHandler(): Future[void] {.async, gcsafe.} =
let conn = await transport1.accept()
await msListen.handle(conn)
let acceptFut = acceptHandler()
let msDial = MultistreamSelect.new()
let transport2: TcpTransport = TcpTransport.init(upgrade = Upgrade())
let conn = await transport2.dial(transport1.ma)
check (await msDial.select(conn,
@[
"/test/proto2/1.0.0",
"/test/proto1/1.0.0"
])) == "/test/proto2/1.0.0"
check string.fromBytes(await conn.readLp(1024)) == "Hello from /test/proto2/1.0.0!"
await conn.close()
await acceptFut
await transport2.stop()
await transport1.stop()