How to know wheter a certain IP address belongs to given network segments?

[Facco Eloelo]

I have a network segment list in a text file called IPsegment.txt,it looks like
this:

IPsegment.txt
219.111.192.0/18
68.132.0.0/17
67.146.0.0/16
192.162.0.0/16
152.172.0.0/16
34.132.0.0/14
97.208.0.0/13


And I have some IP addresses in another text file called IPlist.txt.It looks
like this:

IPlist.txt
www.yahoo.com,66.94.230.51
www.baidu.com,202.108.250.249
www.sina.com.cn,61.135.152.77
www.sohu.com,61.135.150.75
....

Now,I want to know whether the IP addresses in the IPlist.txt belongs the
network segment writen in the IPsegment.txt.
The mathing IP list is output in a new text file called matchinglist.txt.
It looks like this:

matchinglist.txt
www.baidu.com,202.108.250.249
www.sina.com.cn,61.135.152.77
....


How can I do that? Thank you in advance.

 

[Matt Garrish]

I have a network segment list in a text file called IPsegment.txt,it looks like

this:

[snip]

And I have some IP addresses in another text file called IPlist.txt.It looks
like this:
[snip]

Now,I want to know whether the IP addresses in the IPlist.txt belongs the
network segment writen in the IPsegment.txt.
The mathing IP list is output in a new text file called matchinglist.txt.
It looks like this:
[snip]

How can I do that? Thank you in advance.

By splitting the fqdn and IPs into key/value pairs in a hash and then
checking the existence of the address against the hash. In the future,
please make an effort to solve your own problems before postng, and then if
you run into a specific problem you can always ask here.

Matt