IP tools helps to work with IP addresses

Header only library of IP utilities. Uses features of C++11

cidr_v4

IPv4 address storage. If the address represent network address, you can iterate over every address in this network.

Longest Prefix First Search Tree (LPFST)

Data structure allows to add some CIDR networks and check if the given address belongs to any of them.

Example

```C++
#include <iostream>
#include <iptools/cidr.hpp>
#include <iptools/lpfst.hpp>

using namespace iptools;

int main(int argc, char* argv[])
{
	cidr_v4 local("192.168.1.0/24");
	if (local.is_net())
		std::cout << "Network address: " << local << std::endl;
	for (auto i : local)
	{
		if (i == cidr_v4("192.168.1.100/24"))
		{
			if (!i.is_net())
				std::cout << "Host address: " << i << std::endl;
			if (i.in(local))
				std::cout << "Adress " << i << " is in " << local << std::endl;
		}
	}

	lpfst blacklist;
	blacklist.insert({"192.168.1.0/30"});
	blacklist.insert({"192.168.1.100/32"});
	blacklist.insert({"10.2.0.0/16"});
	if (blacklist.check(cidr_v4("192.168.1.2")))
		std::cout << "192.168.1.2 blacklisted" << std::endl;
	if (!blacklist.check(cidr_v4("192.168.1.5")))
		std::cout << "192.168.1.5 is not blacklisted" << std::endl;
	if (blacklist.check(cidr_v4("10.2.0.100")))
		std::cout << "10.2.0.100 is blacklisted" << std::endl;

	return 0;
}
```

Compilation:

g++ --std=c++11 -I /path/to/iptools/include cidr_example.cpp

Output:

Network address: 192.168.1.0/24
Host address: 192.168.1.100/24
Adress 192.168.1.100/24 is in 192.168.1.0/24
192.168.1.2 blacklisted
192.168.1.5 is not blacklisted
10.2.0.100 is blacklisted