DNS name parser

Name

DNS name parser - Java utility library for parsing dns names, ip and hw addresses.

Synopsis

import su.netdb.parser.*;

Parser parser = new Parser();

Hashtable result = parser.parse(str);

System.out.println("string:  "+result.get("string"));
System.out.println("hw:      "+result.get("hw"));
System.out.println("name:    "+result.get("name"));
System.out.println("domain:  "+result.get("domain"));
System.out.println("ip_low:  "+result.get("ip_low"));
System.out.println("ip_high: "+result.get("ip_high"));


Description

"DNS name parser" is an utility library created to be used in a search application. Given a single input field its function is to differentiate between several types of possible input strings. Namely if it a dns name, IP address (exact, ip range or ip with wildcards) or hardware address. The result of the parsing is a Hashtable with possible keys "string", "hw", "name", "domain", "ip_low" and "ip_high". Here are few examples:

input	string	name	doman	hw	ip_low	ip_high
161.64.12-4	NULL	NULL	NULL	NULL	161.64.12.0	161.64.20.14
171.64.20.1[01][1-9]	NULL	NULL	NULL	NULL	171.64.20.1[01][1-9]	NULL
171.66.120.40/29	NULL	NULL	NULL	NULL	171.66.120.40	171.66.120.47
171.64.20.19	NULL	NULL	NULL	NULL	171.64.20.19	171.64.20.19
a.and.b.com	NULL	a	and.b.com	NULL	NULL	NULL
asdj^da4.foo.com	asdj^da4.foo.com	NULL	NULL	NULL	NULL	NULL
FF:0F:EE:0E:DD:0D	NULL	NULL	NULL	FF:0F:EE:0E:DD:0D	NULL	NULL

Complete regression test is provided in distributed package (see file test.java). Compile everything and run script 'test' in top level directory to see all possible inputs.

Requirements

Java 1.5 or higher.
Jakarta ORO.
Note that once unpacked you will probably need to modify SETTINGS file, which describes location of JDK and other settings

Download

dns_name_parser v1.2.1 [HTTP]

See also

Java DOC [HTTP]

P.S.

If you have any questions please contact me at priimak@stanford.edu

Last updated 07/23/2007