Add UDP broadcast socket.

common/TracySocket.cpp

@@ -345,4 +345,82 @@ void ListenSocket::Close()
     m_sock = -1;
 }
 
+UdpBroadcast::UdpBroadcast()
+    : m_sock( -1 )
+{
+#ifdef _WIN32
+    InitWinSock();
+#endif
+}
+
+UdpBroadcast::~UdpBroadcast()
+{
+    if( m_sock != -1 ) Close();
+}
+
+bool UdpBroadcast::Open( const char* addr, const char* port )
+{
+    assert( m_sock == -1 );
+
+    struct addrinfo hints;
+    struct addrinfo *res, *ptr;
+
+    memset( &hints, 0, sizeof( hints ) );
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_DGRAM;
+
+    if( getaddrinfo( addr, port, &hints, &res ) != 0 ) return false;
+    int sock = 0;
+    for( ptr = res; ptr; ptr = ptr->ai_next )
+    {
+        if( ( sock = socket( ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol ) ) == -1 ) continue;
+#if defined __APPLE__
+        int val = 1;
+        setsockopt( sock, SOL_SOCKET, SO_NOSIGPIPE, &val, sizeof( val ) );
+#endif
+#if defined _WIN32 || defined __CYGWIN__
+        unsigned long broadcast = 1;
+        if( setsockopt( sock, SOL_SOCKET, SO_BROADCAST, (const char*)&broadcast, sizeof( broadcast ) ) == -1 )
+#else
+        int broadcast = 1;
+        if( setsockopt( sock, SOL_SOCKET, SO_BROADCAST, &broadcast, sizeof( broadcast ) ) == -1 )
+#endif
+        {
+#ifdef _WIN32
+            closesocket( sock );
+#else
+            close( sock );
+#endif
+            continue;
+        }
+        break;
+    }
+    freeaddrinfo( res );
+    if( !ptr ) return false;
+
+    m_sock = sock;
+    return true;
+}
+
+void UdpBroadcast::Close()
+{
+    assert( m_sock != -1 );
+#ifdef _WIN32
+    closesocket( m_sock );
+#else
+    close( m_sock );
+#endif
+    m_sock = -1;
+}
+
+int UdpBroadcast::Send( const void* data, int len )
+{
+    assert( m_sock != -1 );
+    struct sockaddr_in addr;
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons( 8087 );
+    addr.sin_addr.s_addr = INADDR_BROADCAST;
+    return sendto( m_sock, (const char*)data, len, MSG_NOSIGNAL, (sockaddr*)&addr, sizeof( addr ) );
+}
+
 }

common/TracySocket.hpp

@@ -63,6 +63,26 @@ private:
     int m_sock;
 };
 
+class UdpBroadcast
+{
+public:
+    UdpBroadcast();
+    ~UdpBroadcast();
+
+    bool Open( const char* addr, const char* port );
+    void Close();
+
+    int Send( const void* data, int len );
+
+    UdpBroadcast( const UdpBroadcast& ) = delete;
+    UdpBroadcast( UdpBroadcast&& ) = delete;
+    UdpBroadcast& operator=( const UdpBroadcast& ) = delete;
+    UdpBroadcast& operator=( UdpBroadcast&& ) = delete;
+
+private:
+    int m_sock;
+};
+
 }
 
 #endif