meow-watermelon / dns-flow Goto Github PK

Sat, 19 Nov 2022 16:01:11 +0000	UDP	RESPONSE	50022	ServFail
###[ Ethernet ]### 
  dst       = <masked>
  src       = <masked>
  type      = IPv4
###[ IP ]### 
     version   = 4
     ihl       = 5
     tos       = 0xc0
     len       = 105
     id        = 8510
     flags     = 
     frag      = 0
     ttl       = 64
     proto     = icmp
     chksum    = 0xd47b
     src       = 192.168.1.102
     dst       = 192.168.1.100
     \options   \
###[ ICMP ]### 
        type      = dest-unreach
        code      = port-unreachable
        chksum    = 0x8162
        reserved  = 0
        length    = 0
        nexthopmtu= 0
        unused    = ''
###[ IP in ICMP ]### 
           version   = 4
           ihl       = 5
           tos       = 0x0
           len       = 77
           id        = 63282
           flags     = 
           frag      = 0
           ttl       = 64
           proto     = udp
           chksum    = 0xff52
           src       = 192.168.1.100
           dst       = 192.168.1.102
           \options   \
###[ UDP in ICMP ]### 
              sport     = domain
              dport     = 46760
              len       = 57
              chksum    = 0x362f
###[ DNS ]### 
                 id        = 50022
                 qr        = 1
                 opcode    = QUERY
                 aa        = 0
                 tc        = 0
                 rd        = 1
                 ra        = 1
                 z         = 0
                 ad        = 0
                 cd        = 0
                 rcode     = server-failure
                 qdcount   = 1
                 ancount   = 0
                 nscount   = 0
                 arcount   = 0
                 \qd        \
                  |###[ DNS Question Record ]### 
                  |  qname     = 'copr-be.cloud.fedoraproject.org.'
                  |  qtype     = AAAA
                  |  qclass    = IN
                 an        = None
                 ns        = None
                 ar        = None

None
Traceback (most recent call last):
  File "/home/ericlee/Projects/git/dns-flow/./dns-flow.py", line 122, in process_payload
    print(f'{timestamp}\t{dns_upper_layer}\tRESPONSE\t{dns_id}\t{dns_rcode_text}')
UnboundLocalError: local variable 'dns_upper_layer' referenced before assignment

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/ericlee/Projects/git/dns-flow/./dns-flow.py", line 164, in <module>
    sniff(iface=args.interface, lfilter=lambda p: process_payload(p))
  File "/usr/lib/python3.10/site-packages/scapy/sendrecv.py", line 1263, in sniff
    sniffer._run(*args, **kwargs)
  File "/usr/lib/python3.10/site-packages/scapy/sendrecv.py", line 1206, in _run
    if lfilter and not lfilter(p):
  File "/home/ericlee/Projects/git/dns-flow/./dns-flow.py", line 164, in <lambda>
    sniff(iface=args.interface, lfilter=lambda p: process_payload(p))
  File "/home/ericlee/Projects/git/dns-flow/./dns-flow.py", line 125, in process_payload
    raise Exception
Exception