Update the ipam code to support geofeed.

Makefile

@@ -5,7 +5,9 @@ CPPFLAGS+= -I . -g -O0
 
 all: test ipam
 
-test: ipam
+test:
+
+run: ipam
 	./ipam
 
 clean:

ipam.cc

@@ -229,6 +229,51 @@ try
 		}
 	);
 
+
+	add_command
+	(
+		{
+			"geofeed",
+			"Describe a network's various physical locations.",
+			[]( const std::vector< std::string > &args )
+			{
+				if( args.empty() ) throw std::runtime_error{ "Requires one argument." };
+				if( args.size() != 1 ) throw std::runtime_error{ "Too many arguments." };
+
+				const auto &network= boost::lexical_cast< IP_Address >( args.at( 0 ) );
+				std::cout << "Parsed: `" << network << "` -- it has a " << network.prefix_length()
+						<< " bit mask." << std::endl;
+
+				const Allocation *p= nullptr;
+
+				std::optional< IP_Address > found;
+				auto better= [&]( const auto &where )
+				{
+					return not found.has_value() or where.is_subnet_of( found.value() );
+				};
+
+				for( const auto &space: spaces )
+				{
+					const auto &[ where, owner, name, purpose, country, state, city, postal ]= space;
+					if( network.is_subnet_of( where ) and better( where ) )
+					{
+						found= where;
+						p = &space;
+					}
+				}
+
+				const auto &[ _, owner, name, purpose, country, state, city, postal ]= *p;
+
+				for( const auto &sub: p->subAllocations() )
+				{
+					std::cout << sub.network << "," << sub.country << "," << sub.region
+							<< "," << sub.city << "," << sub.postal
+							<< std::endl;
+				}
+			}
+		}
+	);
+
 				
 
 	while( not std::cin.eof() )