diff --git a/README.md b/README.md index c44b9d6..46dc77d 100644 --- a/README.md +++ b/README.md @@ -107,17 +107,21 @@ dnseval is a bulk ping utility that sends an arbitrary DNS query to a give list of DNS servers. This script is meant for comparing response time of multiple DNS servers at once: ``` -% ./dnseval.py -f public-v4.txt -c3 ripe.net -server avg(ms) min(ms) max(ms) stddev(ms) lost(%) flags ----------------------------------------------------------------------------------- -8.8.8.8 210.225 109.864 407.420 170.785 %0 QR RD RA -8.8.4.4 107.850 93.134 120.578 13.830 %0 QR RD RA -ns.ripe.net 118.911 114.874 123.389 4.275 %0 QR AA RD -4.2.2.1 104.380 102.449 106.588 2.083 %0 QR RD RA -4.2.2.2 131.056 99.143 193.711 54.264 %0 QR RD RA -4.2.2.3 98.956 97.463 100.310 1.429 %0 QR RD RA -4.2.2.4 223.173 97.418 463.728 208.398 %0 QR RD RA -4.2.2.5 104.290 97.264 117.878 11.770 %0 QR RD RA +% ./dnseval.py -e -t AAAA -f public-v4.txt -c10 fg.weberdns.de +server avg(ms) min(ms) max(ms) stddev(ms) lost(%) flags +──────────────────────────────────────────────────────────────────────────────────────────────── +8.8.8.8 94.556 90.488 112.209 6.322 %0 QR -- -- RD RA AD -- +8.8.4.4 92.599 90.265 94.338 1.086 %0 QR -- -- RD RA AD -- +ns.ripe.net 92.754 91.632 93.980 0.900 %0 QR -- -- RD RA AD -- +4.2.2.1 92.703 91.869 93.298 0.482 %0 QR -- -- RD RA AD -- +4.2.2.2 93.195 91.667 94.919 1.065 %0 QR -- -- RD RA AD -- +4.2.2.3 93.118 92.076 94.835 0.835 %0 QR -- -- RD RA AD -- +4.2.2.4 94.308 92.175 103.318 3.261 %0 QR -- -- RD RA AD -- +4.2.2.5 92.650 91.643 94.460 1.002 %0 QR -- -- RD RA AD -- +209.244.0.3 92.810 89.961 94.807 1.266 %0 QR -- -- RD RA AD -- +209.244.0.4 93.127 91.962 95.970 1.227 %0 QR -- -- RD RA AD -- +195.46.39.39 92.770 90.777 93.656 0.914 %0 QR -- -- RD RA AD -- +195.46.39.40 92.903 91.280 94.914 1.147 %0 QR -- -- RD RA AD -- ``` ### Author diff --git a/dnseval.py b/dnseval.py index e061126..6119459 100755 --- a/dnseval.py +++ b/dnseval.py @@ -54,6 +54,7 @@ usage: %s [-h] [-f server-list] [-c count] [-t type] [-w wait] hostname -w --wait maximum wait time for a reply (default: 5) -t --type DNS request record type (default: A) -T --tcp Use TCP instead of UDP + -e --edns Use EDNS0 """ % (__PROGNAME__, __VERSION__, __PROGNAME__)) sys.exit() @@ -115,7 +116,7 @@ def flags_to_text(flags): return ' '.join(text_flags) -def dnsping(host, server, dnsrecord, timeout, count, use_tcp=False): +def dnsping(host, server, dnsrecord, timeout, count, use_tcp=False, use_edns=False): resolver = dns.resolver.Resolver() resolver.nameservers = [server] resolver.timeout = timeout @@ -123,7 +124,8 @@ def dnsping(host, server, dnsrecord, timeout, count, use_tcp=False): resolver.retry_servfail = 0 flags = 0 answers = None - resolver.use_edns(edns=0, payload=4096, ednsflags=dns.flags.edns_from_text('DO')) + if use_edns: + resolver.use_edns(edns=0, payload=8192, ednsflags=dns.flags.edns_from_text('DO')) response_times = [] i = 0 @@ -133,7 +135,8 @@ def dnsping(host, server, dnsrecord, timeout, count, use_tcp=False): break try: stime = time.time() - answers = resolver.query(host, dnsrecord, tcp=use_tcp, raise_on_no_answer=False) # todo: response validation in future + answers = resolver.query(host, dnsrecord, tcp=use_tcp, + raise_on_no_answer=False) # todo: response validation in future etime = time.time() except (dns.resolver.NoNameservers, dns.resolver.NoAnswer): break @@ -184,11 +187,12 @@ def main(): inputfilename = None fromfile = False use_tcp = False + use_edns = False hostname = 'wikipedia.org' try: - opts, args = getopt.getopt(sys.argv[1:], "hf:c:t:w:T", - ["help", "file=", "count=", "type=", "wait=", "tcp"]) + opts, args = getopt.getopt(sys.argv[1:], "hf:c:t:w:Te", + ["help", "file=", "count=", "type=", "wait=", "tcp", "edns"]) except getopt.GetoptError as err: print(err) usage() @@ -212,6 +216,8 @@ def main(): dnsrecord = a elif o in ("-T", "--tcp"): use_tcp = True + elif o in ("-e", "--edns"): + use_edns = True else: print("Invalid option: %s" % o) usage() @@ -251,7 +257,8 @@ def main(): if not s: continue (s, r_avg, r_min, r_max, r_stddev, r_lost_percent, flags) = dnsping(hostname, s, dnsrecord, waittime, - count, use_tcp=use_tcp) + count, use_tcp=use_tcp, + use_edns=use_edns) s = server.ljust(width + 1) text_flags = flags_to_text(flags) diff --git a/requirements.txt b/requirements.txt index e69de29..a5d6526 100644 --- a/requirements.txt +++ b/requirements.txt @@ -0,0 +1 @@ +dnspython==1.15.0