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Add CSUBNET address logging #35

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Add CSUBNET address logging #35

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b53f74c
Dirty imp for CSUBNET field logging
J-Run Jun 27, 2022
fd5adba
add --csubnet param
J-Run Jun 28, 2022
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18 changes: 18 additions & 0 deletions dnschef.py
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Original file line number Diff line number Diff line change
Expand Up @@ -124,8 +124,25 @@ def parse(self, data):
# Create a custom response to the query
response = DNSRecord(DNSHeader(id=d.header.id, bitmap=d.header.bitmap, qr=1, aa=1, ra=1), q=d.q)

if options.csubnet:
if len(d.ar):
for rdata in d.ar[0].rdata:
if rdata.code == 8:
netmask = rdata.data[2]
client_subnet = ""
for i in range(4, len(rdata.data)):
client_subnet += str(rdata.data[i])
if i < len(rdata.data) - 1:
client_subnet += "."
for m in range(i, 7):
client_subnet += ".0"
log.info(f"{self.client_address[0]} [{client_subnet}/{netmask}]: cooking the response of type '{qtype}' for {qname} to {fake_record}")

log.info(f"{self.client_address[0]}: cooking the response of type '{qtype}' for {qname} to {fake_record}")




# IPv6 needs additional work before inclusion:
if qtype == "AAAA":
ipv6_hex_tuple = list(map(int, ip_address(fake_record).packed))
Expand Down Expand Up @@ -473,6 +490,7 @@ def start_cooking(interface, nametodns, nameservers, tcp=False, ipv6=False, port
rungroup.add_argument("-6","--ipv6", action="store_true", default=False, help="Run in IPv6 mode.")
rungroup.add_argument("-p","--port", metavar="53", default="53", help='Port number to listen for DNS requests.')
rungroup.add_argument("-q", "--quiet", action="store_false", dest="verbose", default=True, help="Don't show headers.")
rungroup.add_argument("--csubnet", action="store_true", default=False, help="Log CSUBNET addr.")

options = parser.parse_args()

Expand Down