[C++/CLI] UDPプログラミング

UDP送信プログラムのメモ書きです。下記のサンプルは、サーバー側でテキストボックスの内容を送信しています。

送信側（サーバ）

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1. int groupPort = 11000;  
2. IPEndPoint ^groupEP = gcnew IPEndPoint(IPAddress::Parse("255.255.255.255"), groupPort);  
3. //ブロードキャストの場合  
4. //groupEP = gcnew IPEndPoint(IPAddress::Broadcast, groupPort);  
5. groupEP = gcnew IPEndPoint(IPAddress::Parse("192.168.1.28"), groupPort);  
6.   
7. Socket ^socket = gcnew Socket(AddressFamily::InterNetwork, SocketType::Dgram, ProtocolType::Udp);  
8. socket->SetSocketOption(SocketOptionLevel::Socket, SocketOptionName::Broadcast, 1);  
9. socket->SendTo(System::Text::ASCIIEncoding::ASCII->GetBytes(textBox1->Text), groupEP);  

int groupPort = 11000;
IPEndPoint ^groupEP = gcnew IPEndPoint(IPAddress::Parse("255.255.255.255"), groupPort);
//ブロードキャストの場合
//groupEP = gcnew IPEndPoint(IPAddress::Broadcast, groupPort);
groupEP = gcnew IPEndPoint(IPAddress::Parse("192.168.1.28"), groupPort);

Socket ^socket = gcnew Socket(AddressFamily::InterNetwork, SocketType::Dgram, ProtocolType::Udp);
socket->SetSocketOption(SocketOptionLevel::Socket, SocketOptionName::Broadcast, 1);
socket->SendTo(System::Text::ASCIIEncoding::ASCII->GetBytes(textBox1->Text), groupEP);

受信側（クライアント）

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1. Socket ^listener = gcnew Socket(AddressFamily::InterNetwork, SocketType::Dgram,ProtocolType::Udp);  
2. IPEndPoint ^localEndPoint = gcnew IPEndPoint(IPAddress::Any, 11000);  
3. listener->Bind(localEndPoint);  
4.   
5. EndPoint ^ep = gcnew IPEndPoint(0,0);  
6. System::Diagnostics::Debug::WriteLine("Ready to receive…");  
7.   
8.   
9. array＜Byte＞ ^data = gcnew array＜Byte＞(1024);  
10. int recv = listener->ReceiveFrom(data, ep);  
11. String ^stringData = Encoding::ASCII->GetString(data, 0, recv);  
12. System::Diagnostics::Debug::WriteLine(stringData);  
13. listener->Close();  

Socket ^listener = gcnew Socket(AddressFamily::InterNetwork, SocketType::Dgram,ProtocolType::Udp);
IPEndPoint ^localEndPoint = gcnew IPEndPoint(IPAddress::Any, 11000);
listener->Bind(localEndPoint);

EndPoint ^ep = gcnew IPEndPoint(0,0);
System::Diagnostics::Debug::WriteLine("Ready to receive…");


array＜Byte＞ ^data = gcnew array＜Byte＞(1024);
int recv = listener->ReceiveFrom(data, ep);
String ^stringData = Encoding::ASCII->GetString(data, 0, recv);
System::Diagnostics::Debug::WriteLine(stringData);
listener->Close();