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Add timeout to DNS queries #53

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Add timeout to DNS queries #53

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7 changes: 5 additions & 2 deletions subbrute.py
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@
import socket
import struct

# Maximum time to wait for a DNS query to complete
QUERY_TIMEOUT = 4

#Python 2.x and 3.x compatiablity
#We need the Queue library for exception handling
try:
Expand Down Expand Up @@ -63,7 +66,7 @@ def query(self, hostname, query_type = 'ANY', name_server = False, use_tcp = Tru
self.last_resolver = name_server
query = dnslib.DNSRecord.question(hostname, query_type.upper().strip())
try:
response_q = query.send(name_server, 53, use_tcp)
response_q = query.send(name_server, 53, use_tcp, QUERY_TIMEOUT)
if response_q:
response = dnslib.DNSRecord.parse(response_q)
else:
Expand Down Expand Up @@ -856,4 +859,4 @@ def signal_init():
target = target.strip()
if target:
trace(target, record_type, options.subs, options.resolvers, options.process_count, options.print_data, output, json_output)
print_target(target, record_type, options.subs, options.resolvers, options.process_count, options.print_data, output, json_output)
print_target(target, record_type, options.subs, options.resolvers, options.process_count, options.print_data, output, json_output)