DNS Lookup with cache

A Java implementation of DNS lookup with cache usage.

Setup

1. Clone directory
2. In root folder, compile code with javac -d out src/ca/ubc/cs/cs317/dnslookup/*.java
3. Create jar file jar cfe dnslookup.jar ca.ubc.cs.cs317.dnslookup.DNSLookupCUI -C out .
4. Run jar file java -jar dnslookup.jar

How to use

Description is listed directly in terminal, but here is a reference.

Commands:

Command	Example	Description
lookup	lookup github.com	Returns dns information of url
verbose <on/off>	verbose on	Shows all steps of the dns tracing
dump	dump	dumps all resources used
reset	reset	resets cache and program
quit	quit	exits program

Example

With verbose on: lookup google.com

Query ID     41388 google.com  A --> 192.33.14.30
Response ID: 41388 Authoritative = false Error = 0 (No error)
  Answers (0)
  Nameservers (4)
       google.com                     172800     NS    IN    ns2.google.com
       google.com                     172800     NS    IN    ns1.google.com
       google.com                     172800     NS    IN    ns3.google.com
       google.com                     172800     NS    IN    ns4.google.com
  Additional Information (8)
       ns2.google.com                 172800     AAAA  IN    2001:4860:4802:34:0:0:0:a
       ns2.google.com                 172800     A     IN    216.239.34.10
       ns1.google.com                 172800     AAAA  IN    2001:4860:4802:32:0:0:0:a
       ns1.google.com                 172800     A     IN    216.239.32.10
       ns3.google.com                 172800     AAAA  IN    2001:4860:4802:36:0:0:0:a
       ns3.google.com                 172800     A     IN    216.239.36.10
       ns4.google.com                 172800     AAAA  IN    2001:4860:4802:38:0:0:0:a
       ns4.google.com                 172800     A     IN    216.239.38.10


Query ID     59076 google.com  A --> 216.239.38.10
Response ID: 59076 Authoritative = true Error = 0 (No error)
  Answers (1)
       google.com                     300        A     IN    142.251.41.78
  Nameservers (0)
  Additional Information (0)

========== FINAL RESULT ==========
       google.com                     300        A     IN    142.251.41.78