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