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add option to use arbitrary DNS port number (default 53)

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Babak Farrokhi 2016-04-12 12:57:26 +04:30
parent 3ac3a1e843
commit 4ac4abf20b
Signed by: farrokhi
GPG Key ID: 6B267AD85D632E9A
1 changed files with 16 additions and 10 deletions
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dnsping.py
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@ -45,12 +45,13 @@ should_stop = False
def usage(): def usage():
print('%s version %1.1f\n' % (__PROGNAME__, __VERSION__)) print('%s version %1.1f\n' % (__PROGNAME__, __VERSION__))
print('syntax: %s [-h] [-q] [-v] [-s server] [-c count] [-t type] [-w wait] hostname' % __PROGNAME__) print('syntax: %s [-h] [-q] [-v] [-s server] [-c count] [-t type] [-w wait] hostname' % __PROGNAME__)
print(' -h --help show this help') print(' -h --help Show this help')
print(' -q --quiet quiet') print(' -q --quiet Quiet')
print(' -v --verbose print actual dns response') print(' -v --verbose Print actual dns response')
print(' -s --server dns server to use (default: 8.8.8.8)') print(' -s --server DNS server to use (default: 8.8.8.8)')
print(' -c --count number of requests to send (default: 10)') print(' -p --port DNS server port number (default: 53)')
print(' -w --wait maximum wait time for a reply (default: 5)') print(' -c --count Number of requests to send (default: 10)')
print(' -w --wait Maximum wait time for a reply (default: 5)')
print(' -t --type DNS request record type (default: A)') print(' -t --type DNS request record type (default: A)')
print(' ') print(' ')
exit() exit()
@ -70,17 +71,19 @@ def main():
if len(sys.argv) == 1: if len(sys.argv) == 1:
usage() usage()
# defaults
dnsrecord = 'A' dnsrecord = 'A'
count = 10 count = 10
timeout = 5 timeout = 5
quiet = False quiet = False
verbose = False verbose = False
dnsserver = '8.8.8.8' dnsserver = '8.8.8.8'
dest_port = 53
hostname = 'wikipedia.org' hostname = 'wikipedia.org'
try: try:
opts, args = getopt.getopt(sys.argv[1:], "qhc:s:t:w:v", opts, args = getopt.getopt(sys.argv[1:], "qhc:s:t:w:vp:",
["help", "output=", "count=", "server=", "quiet", "type=", "wait=", "verbose"]) ["help", "output=", "count=", "server=", "quiet", "type=", "wait=", "verbose", "port"])
except getopt.GetoptError as err: except getopt.GetoptError as err:
# print help information and exit: # print help information and exit:
print(err) # will print something like "option -a not recognized" print(err) # will print something like "option -a not recognized"
@ -100,7 +103,8 @@ def main():
verbose = True verbose = True
elif o in ("-s", "--server"): elif o in ("-s", "--server"):
dnsserver = a dnsserver = a
elif o in ("-p", "--port"):
dest_port = int(a)
elif o in ("-q", "--quiet"): elif o in ("-q", "--quiet"):
quiet = True quiet = True
verbose = False verbose = False
@ -125,12 +129,14 @@ def main():
resolver.nameservers = [dnsserver] resolver.nameservers = [dnsserver]
resolver.timeout = timeout resolver.timeout = timeout
resolver.lifetime = timeout resolver.lifetime = timeout
resolver.port = dest_port
resolver.retry_servfail = 0 resolver.retry_servfail = 0
response_time = [] response_time = []
i = 0 i = 0
print("%s %s: hostname=%s rdatatype=%s" % (__PROGNAME__, dnsserver, hostname, dnsrecord)) print("%s DNS: %s:%d, hostname: %s, rdatatype: %s" % (__PROGNAME__, dnsserver, dest_port, hostname, dnsrecord))
for i in range(count): for i in range(count):
if should_stop: if should_stop: