248 lines
11 KiB
Nim
248 lines
11 KiB
Nim
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{.used.}
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import std/[streams, strutils, sets, sequtils, tables, algorithm]
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import chronos, stew/byteutils
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import ../libp2p/[stream/connection,
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transports/transport,
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transports/tcptransport,
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upgrademngrs/upgrade,
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multiaddress,
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errors,
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nameresolving/nameresolver,
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nameresolving/dnsresolver,
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nameresolving/mockresolver,
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wire]
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import ./helpers
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#
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#Cloudflare
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const fallbackDnsServers = @[
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initTAddress("1.1.1.1:53"),
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initTAddress("1.0.0.1:53"),
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initTAddress("[2606:4700:4700::1111]:53")
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]
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const unixPlatform = defined(linux) or defined(solaris) or
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defined(macosx) or defined(freebsd) or
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defined(netbsd) or defined(openbsd) or
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defined(dragonfly)
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proc guessOsNameServers(): seq[TransportAddress] =
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when unixPlatform:
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var resultSeq = newSeqOfCap[TransportAddress](3)
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try:
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for l in lines("/etc/resolv.conf"):
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let lineParsed = l.strip().split(seps = Whitespace + {'%'}, maxsplit = 2)
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if lineParsed.len < 2: continue
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if lineParsed[0].startsWith('#'): continue
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if lineParsed[0] == "nameserver":
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resultSeq.add(initTAddress(lineParsed[1], Port(53)))
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if resultSeq.len > 2: break #3 nameserver max on linux
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except Exception as e:
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echo "Failed to get unix nameservers ", e.msg
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finally:
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if resultSeq.len > 0:
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return resultSeq
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return fallbackDnsServers
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elif defined(windows):
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#TODO
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return fallbackDnsServers
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else:
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return fallbackDnsServers
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suite "Name resolving":
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suite "Generic Resolving":
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var resolver {.threadvar.}: MockResolver
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proc testOne(input: string, output: seq[Multiaddress]): bool =
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let resolved = waitFor resolver.resolveMAddresses(@[Multiaddress.init(input).tryGet()])
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if resolved != output:
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echo "Expected ", output
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echo "Got ", resolved
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return false
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return true
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proc testOne(input: string, output: seq[string]): bool =
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testOne(input, output.mapIt(Multiaddress.init(it).tryGet()))
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proc testOne(input, output: string): bool =
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testOne(input, @[Multiaddress.init(output).tryGet()])
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asyncSetup:
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resolver = MockResolver.new()
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asyncTest "test multi address dns resolve":
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resolver.ipResponses[("localhost", false)] = @["127.0.0.1"]
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resolver.ipResponses[("localhost", true)] = @["::1"]
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check testOne("/dns/localhost/udp/0", @["/ip4/127.0.0.1/udp/0", "/ip6/::1/udp/0"])
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check testOne("/dns4/localhost/tcp/0", "/ip4/127.0.0.1/tcp/0")
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check testOne("/dns6/localhost/tcp/0", "/ip6/::1/tcp/0")
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check testOne("/dns6/localhost/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN", "/ip6/::1/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN")
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asyncTest "test non dns resolve":
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resolver.ipResponses[("localhost", false)] = @["127.0.0.1"]
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resolver.ipResponses[("localhost", true)] = @["::1"]
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check testOne("/ip6/::1/tcp/0", "/ip6/::1/tcp/0")
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asyncTest "test multiple resolve":
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resolver.ipResponses[("localhost", false)] = @["127.0.0.1"]
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resolver.ipResponses[("localhost", true)] = @["::1"]
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let resolved = waitFor resolver.resolveMAddresses(@[
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Multiaddress.init("/dns/localhost/udp/0").tryGet(),
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Multiaddress.init("/dns4/localhost/udp/0").tryGet(),
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Multiaddress.init("/dns6/localhost/udp/0").tryGet(),
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])
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check resolved == @[Multiaddress.init("/ip4/127.0.0.1/udp/0").tryGet(), Multiaddress.init("/ip6/::1/udp/0").tryGet()]
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asyncTest "dnsaddr recursive test":
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resolver.txtResponses["_dnsaddr.bootstrap.libp2p.io"] = @[
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"dnsaddr=/dnsaddr/sjc-1.bootstrap.libp2p.io/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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"dnsaddr=/dnsaddr/ams-2.bootstrap.libp2p.io/tcp/4001/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb"
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]
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resolver.txtResponses["_dnsaddr.sjc-1.bootstrap.libp2p.io"] = @[
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"dnsaddr=/ip6/2604:1380:1000:6000::1/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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"dnsaddr=/ip4/147.75.69.143/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN"
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]
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resolver.txtResponses["_dnsaddr.ams-2.bootstrap.libp2p.io"] = @[
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"dnsaddr=/ip4/147.75.83.83/tcp/4001/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb",
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"dnsaddr=/ip6/2604:1380:2000:7a00::1/tcp/4001/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb"
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]
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check testOne("/dnsaddr/bootstrap.libp2p.io/", @[
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"/ip6/2604:1380:1000:6000::1/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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"/ip4/147.75.69.143/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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"/ip4/147.75.83.83/tcp/4001/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb",
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"/ip6/2604:1380:2000:7a00::1/tcp/4001/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb",
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])
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asyncTest "dnsaddr suffix matching test":
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resolver.txtResponses["_dnsaddr.bootstrap.libp2p.io"] = @[
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"dnsaddr=/dnsaddr/ams-2.bootstrap.libp2p.io/tcp/4001/p2p/QmbLHAnMoJPWSCR5Zhtx6BHJX9KiKNN6tpvbUcqanj75Nb",
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"dnsaddr=/dnsaddr/sjc-1.bootstrap.libp2p.io/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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"dnsaddr=/dnsaddr/nrt-1.bootstrap.libp2p.io/tcp/4001/p2p/QmcZf59bWwK5XFi76CZX8cbJ4BhTzzA3gU1ZjYZcYW3dwt",
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"dnsaddr=/dnsaddr/ewr-1.bootstrap.libp2p.io/tcp/4001/p2p/QmQCU2EcMqAqQPR2i9bChDtGNJchTbq5TbXJJ16u19uLTa",
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]
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resolver.txtResponses["_dnsaddr.sjc-1.bootstrap.libp2p.io"] = @[
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"dnsaddr=/ip4/147.75.69.143/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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"dnsaddr=/ip6/2604:1380:1000:6000::1/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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]
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resolver.txtResponses["_dnsaddr.ams-1.bootstrap.libp2p.io"] = @[
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"dnsaddr=/ip4/147.75.69.143/tcp/4001/p2p/shouldbefiltered",
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"dnsaddr=/ip6/2604:1380:1000:6000::1/tcp/4001/p2p/shouldbefiltered",
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]
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check testOne("/dnsaddr/bootstrap.libp2p.io/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN", @[
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"/ip4/147.75.69.143/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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"/ip6/2604:1380:1000:6000::1/tcp/4001/p2p/QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
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])
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asyncTest "dnsaddr infinite recursion":
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resolver.txtResponses["_dnsaddr.bootstrap.libp2p.io"] = @["dnsaddr=/dnsaddr/bootstrap.libp2p.io"]
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check testOne("/dnsaddr/bootstrap.libp2p.io/", "/dnsaddr/bootstrap.libp2p.io/")
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suite "DNS Resolving":
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teardown:
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checkTrackers()
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asyncTest "test manual dns ip resolve":
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## DNS mock server
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proc clientMark1(transp: DatagramTransport,
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raddr: TransportAddress): Future[void] {.async.} =
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var msg = transp.getMessage()
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let
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resp = if msg[24] == 1: #AAAA or A
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"\xae\xbf\x81\x80\x00\x01\x00\x03\x00\x00\x00\x00\x06\x73\x74\x61" &
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"\x74\x75\x73\x02\x69\x6d\x00\x00\x01\x00\x01\xc0\x0c\x00\x01\x00" &
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"\x01\x00\x00\x00\x4f\x00\x04\x68\x16\x18\xb5\xc0\x0c\x00\x01\x00" &
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"\x01\x00\x00\x00\x4f\x00\x04\xac\x43\x0a\xa1\xc0\x0c\x00\x01\x00" &
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"\x01\x00\x00\x00\x4f\x00\x04\x68\x16\x19\xb5"
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else:
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"\xe8\xc5\x81\x80\x00\x01\x00\x03\x00\x00\x00\x00\x06\x73\x74\x61" &
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"\x74\x75\x73\x02\x69\x6d\x00\x00\x1c\x00\x01\xc0\x0c\x00\x1c\x00" &
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"\x01\x00\x00\x00\x4f\x00\x10\x26\x06\x47\x00\x00\x10\x00\x00\x00" &
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"\x00\x00\x00\x68\x16\x19\xb5\xc0\x0c\x00\x1c\x00\x01\x00\x00\x00" &
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"\x4f\x00\x10\x26\x06\x47\x00\x00\x10\x00\x00\x00\x00\x00\x00\x68" &
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"\x16\x18\xb5\xc0\x0c\x00\x1c\x00\x01\x00\x00\x00\x4f\x00\x10\x26" &
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"\x06\x47\x00\x00\x10\x00\x00\x00\x00\x00\x00\xac\x43\x0a\xa1"
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await transp.sendTo(raddr, resp)
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let server = newDatagramTransport(clientMark1)
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# The test
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var dnsresolver = DnsResolver.new(@[server.localAddress])
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check await(dnsresolver.resolveIp("status.im", 0.Port, Domain.AF_UNSPEC)) ==
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mapIt(
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@["104.22.24.181:0", "172.67.10.161:0", "104.22.25.181:0",
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"[2606:4700:10::6816:19b5]:0", "[2606:4700:10::6816:18b5]:0", "[2606:4700:10::ac43:aa1]:0"
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], initTAddress(it))
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check await(dnsresolver.resolveIp("status.im", 0.Port, Domain.AF_INET)) ==
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mapIt(@["104.22.24.181:0", "172.67.10.161:0", "104.22.25.181:0"], initTAddress(it))
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check await(dnsresolver.resolveIp("status.im", 0.Port, Domain.AF_INET6)) ==
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mapIt(@["[2606:4700:10::6816:19b5]:0", "[2606:4700:10::6816:18b5]:0", "[2606:4700:10::ac43:aa1]:0"], initTAddress(it))
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await server.closeWait()
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asyncTest "test unresponsive dns server":
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var unresponsiveTentatives = 0
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## DNS mock server
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proc clientMark1(transp: DatagramTransport,
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raddr: TransportAddress): Future[void] {.async.} =
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unresponsiveTentatives.inc()
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check unresponsiveTentatives == 1
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proc clientMark2(transp: DatagramTransport,
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raddr: TransportAddress): Future[void] {.async.} =
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var msg = transp.getMessage()
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let resp =
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"\xae\xbf\x81\x80\x00\x01\x00\x03\x00\x00\x00\x00\x06\x73\x74\x61" &
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"\x74\x75\x73\x02\x69\x6d\x00\x00\x01\x00\x01\xc0\x0c\x00\x01\x00" &
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"\x01\x00\x00\x00\x4f\x00\x04\x68\x16\x18\xb5\xc0\x0c\x00\x01\x00" &
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"\x01\x00\x00\x00\x4f\x00\x04\xac\x43\x0a\xa1\xc0\x0c\x00\x01\x00" &
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"\x01\x00\x00\x00\x4f\x00\x04\x68\x16\x19\xb5"
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await transp.sendTo(raddr, resp)
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let
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unresponsiveServer = newDatagramTransport(clientMark1)
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server = newDatagramTransport(clientMark2)
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# The test
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var dnsresolver = DnsResolver.new(@[unresponsiveServer.localAddress, server.localAddress])
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check await(dnsresolver.resolveIp("status.im", 0.Port, Domain.AF_INET)) ==
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mapIt(@["104.22.24.181:0", "172.67.10.161:0", "104.22.25.181:0"], initTAddress(it))
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check await(dnsresolver.resolveIp("status.im", 0.Port, Domain.AF_INET)) ==
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mapIt(@["104.22.24.181:0", "172.67.10.161:0", "104.22.25.181:0"], initTAddress(it))
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await server.closeWait()
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await unresponsiveServer.closeWait()
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asyncTest "inexisting domain resolving":
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var dnsresolver = DnsResolver.new(guessOsNameServers())
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let invalid = await dnsresolver.resolveIp("thisdomain.doesnot.exist", 0.Port)
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check invalid.len == 0
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asyncTest "wrong domain resolving":
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var dnsresolver = DnsResolver.new(guessOsNameServers())
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let invalid = await dnsresolver.resolveIp("", 0.Port)
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check invalid.len == 0
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asyncTest "unreachable dns server":
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var dnsresolver = DnsResolver.new(@[initTAddress("172.67.10.161:53")])
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let invalid = await dnsresolver.resolveIp("google.fr", 0.Port)
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check invalid.len == 0
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