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// NameLookup.cpp
// Implements a DNS name lookup using the LibEvent-based cNetwork API
#include "Globals.h"
#include <thread>
#include "OSSupport/Event.h"
#include "OSSupport/Network.h"
class cFinishLookupCallbacks:
public cNetwork::cResolveNameCallbacks
{
cEvent & m_Event;
virtual void OnNameResolved(const AString & a_Name, const AString & a_IP) override
{
LOGD("%s resolves to IP %s", a_Name.c_str(), a_IP.c_str());
}
virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override
{
LOGD("Error %d (%s) while performing lookup!", a_ErrorCode, a_ErrorMsg.c_str());
exit(a_ErrorCode);
}
virtual void OnFinished(void) override
{
LOGD("Resolving finished.");
m_Event.Set();
}
public:
cFinishLookupCallbacks(cEvent & a_Event):
m_Event(a_Event)
{
}
};
int main()
{
cEvent evtFinish;
// Look up google.com (has multiple IP addresses):
LOGD("Network test: Looking up google.com");
if (!cNetwork::HostnameToIP("google.com", std::make_shared<cFinishLookupCallbacks>(evtFinish)))
{
LOGWARNING("Cannot resolve google.com to IP");
abort();
}
LOGD("Name lookup has been successfully queued");
evtFinish.Wait();
LOGD("Lookup finished.");
// Look up 8.8.8.8 (Google free DNS):
LOGD("Network test: Looking up IP 8.8.8.8");
if (!cNetwork::IPToHostName("8.8.8.8", std::make_shared<cFinishLookupCallbacks>(evtFinish)))
{
LOGWARNING("Cannot resolve 8.8.8.8 to name");
abort();
}
LOGD("IP lookup has been successfully queued");
evtFinish.Wait();
LOGD("IP lookup finished.");
LOGD("Network test finished");
return 0;
}
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