Monthly Archives: March 2011

Poco::Net::DNS

Posted by on March 13, 2011 No comments

Poco::Net::DNS を紹介します。

DNSTest.cpp

・Poco::Net::DNS::hostName() で自身のホスト名を取得し表示。
・Poco::Net::DNS::flushCache() でキャッシュをクリアした後、
　- Poco::Net::DNS::hostByName()
　- Poco::Net::DNS::hostByAddress()
　- Poco::Net::DNS::resolve(hostname)
　- Poco::Net::DNS::resolve(hostaddress)
　で取得した Poco::Net::HostEntry の要素を列挙。

#include <Poco/Logger.h>
#include <Poco/PatternFormatter.h>
#include <Poco/FormattingChannel.h>
#include <Poco/ConsoleChannel.h>
#include <Poco/Net/DNS.h>
#include <Poco/Net/IPAddress.h>
#include <Poco/Net/NetException.h>
 
#include <string>
 
#include "ScopedLogMessage.h"
 
void PrepareConsoleLogger(const std::string& name, int level=Poco::Message::PRIO_INFORMATION)
{
	Poco::FormattingChannel* pFCConsole = new Poco::FormattingChannel(new Poco::PatternFormatter("%t"));
	pFCConsole->setChannel(new Poco::ConsoleChannel);
	pFCConsole->open();
 
	Poco::Logger::create(name, pFCConsole, level);
}
 
void ShowHostEntryItems(const Poco::Net::HostEntry& he, const ScopedLogMessage& msg)
{
	msg.Message(Poco::format("       name: %s", he.name()));
	for(Poco::Net::HostEntry::AddressList::const_iterator itr=he.addresses().begin(); itr!=he.addresses().end(); ++itr)
	{
		msg.Message(Poco::format("  address#%d: %s",
						static_cast<int>(itr-he.addresses().begin()),
						itr->toString()));
	}
	for(Poco::Net::HostEntry::AliasList::const_iterator itr=he.aliases().begin(); itr!=he.aliases().end(); ++itr)
	{
		msg.Message(Poco::format("    alias#%d: %s",
						static_cast<int>(itr-he.aliases().begin()),
						*itr));
	}
}
 
int main(int /*argc*/, char** /*argv*/)
{
	PrepareConsoleLogger(Poco::Logger::ROOT, Poco::Message::PRIO_INFORMATION);
 
	ScopedLogMessage msg("DNSTest ", "start", "end");
 
	msg.Message("Poco::Net::DNS::hostName()");
	msg.Message(Poco::format("  %s", Poco::Net::DNS::hostName()));
 
	const std::string hostname("www.google.com");
	const std::string hostaddress("66.249.89.104");
	const Poco::Net::IPAddress ipaddress(hostaddress);
 
	Poco::Net::DNS::flushCache();
 
	try
	{
		msg.Message(Poco::format("Poco::Net::DNS::hostByName(\"%s\")", hostname));
		ShowHostEntryItems(Poco::Net::DNS::hostByName(hostname), msg);
 
		msg.Message(Poco::format("Poco::Net::DNS::hostByAddress(Poco::Net::IPAddress(\"%s\"))", ipaddress.toString()));
		ShowHostEntryItems(Poco::Net::DNS::hostByAddress(ipaddress), msg);
 
		msg.Message(Poco::format("Poco::Net::DNS::resolve(\"%s\")", hostname));
		ShowHostEntryItems(Poco::Net::DNS::resolve(hostname), msg);
 
		msg.Message(Poco::format("Poco::Net::DNS::resolve(\"%s\")", hostaddress));
		ShowHostEntryItems(Poco::Net::DNS::resolve(hostaddress), msg);
	}
	catch(Poco::Net::HostNotFoundException&)
	{
	}
	catch(Poco::Net::NoAddressFoundException&)
	{
	}
	catch(Poco::Net::DNSException&)
	{
	}
	catch(Poco::IOException&)
	{
	}
 
	return 0;
}

Results of execution

・On Linux

[0] DNSTest start
[0] Poco::Net::DNS::hostName()
[0]   debian
[0] Poco::Net::DNS::hostByName("www.google.com")
[0]        name: www.l.google.com
[0]   address#0: 66.249.89.104
[0]   address#1: 66.249.89.99
[0]     alias#0: www.google.com
[0] Poco::Net::DNS::hostByAddress(Poco::Net::IPAddress("66.249.89.104"))
[0]        name: www.l.google.com
[0]   address#0: 66.249.89.104
[0]   address#1: 66.249.89.99
[0]     alias#0: www.google.com
[0] Poco::Net::DNS::resolve("www.google.com")
[0]        name: www.l.google.com
[0]   address#0: 66.249.89.104
[0]   address#1: 66.249.89.99
[0]     alias#0: www.google.com
[0] Poco::Net::DNS::resolve("66.249.89.104")
[0]        name: www.l.google.com
[0]   address#0: 66.249.89.104
[0]   address#1: 66.249.89.99
[0]     alias#0: www.google.com
[0] DNSTest end

・On Macintosh OSX 10.6.6

[0] DNSTest start
[0] Poco::Net::DNS::hostName()
[0]   Mac-mini.local
[0] Poco::Net::DNS::hostByName("www.google.com")
[0]        name: www.l.google.com
[0]   address#0: 66.249.89.99
[0]   address#1: 66.249.89.104
[0]     alias#0: www.google.com
[0] Poco::Net::DNS::hostByAddress(Poco::Net::IPAddress("66.249.89.104"))
[0]        name: nrt04s01-in-f104.1e100.net
[0]   address#0: 66.249.89.104
[0]     alias#0: 104.89.249.66.in-addr.arpa
[0] Poco::Net::DNS::resolve("www.google.com")
[0]        name: www.l.google.com
[0]   address#0: 66.249.89.99
[0]   address#1: 66.249.89.104
[0]     alias#0: www.google.com
[0] Poco::Net::DNS::resolve("66.249.89.104")
[0]        name: nrt04s01-in-f104.1e100.net
[0]   address#0: 66.249.89.104
[0]     alias#0: 104.89.249.66.in-addr.arpa
[0] DNSTest end

・On Windows XP sp3

[0] DNSTest start
[0] Poco::Net::DNS::hostName()
[0]   setsu-shy3m0tg8
[0] Poco::Net::DNS::hostByName("www.google.com")
[0]        name: www.google.com
[0]   address#0: 66.249.89.99
[0] Poco::Net::DNS::hostByAddress(Poco::Net::IPAddress("66.249.89.104"))
[0]        name: nrt04s01-in-f104.1e100.net
[0]   address#0: 66.249.89.104
[0] Poco::Net::DNS::resolve("www.google.com")
[0]        name: www.google.com
[0]   address#0: 66.249.89.99
[0] Poco::Net::DNS::resolve("66.249.89.104")
[0]        name: nrt04s01-in-f104.1e100.net
[0]   address#0: 66.249.89.104
[0] DNSTest end

Downloads

・ここをクリックすると、makefile や VC++ プロジェクトなど一式がダウンロードできます。
・2011年3月13日からのダウンロード数：135

Subversion

・フリーの Subversion ホスティングサービス Assemblaで、ソースコードを管理しています。

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