blocking socket implementation

PiperOrigin-RevId: 715617508

internal/platform/implementation/windows/nearby_client_socket.h

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+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_NEARBY_CLIENT_SOCKET_H_
+#define THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_NEARBY_CLIENT_SOCKET_H_
+
+#include <winsock2.h>
+
+#include <cstddef>
+#include <cstdint>
+#include <string>
+
+#include "internal/platform/byte_array.h"
+#include "internal/platform/exception.h"
+
+namespace nearby::windows {
+
+class NearbyClientSocket {
+ public:
+  NearbyClientSocket();
+  explicit NearbyClientSocket(SOCKET socket);
+  ~NearbyClientSocket();
+
+  bool Connect(const std::string& ip_address, int port);
+  ExceptionOr<ByteArray> Read(std::int64_t size);
+  ExceptionOr<size_t> Skip(size_t offset);
+  Exception Write(const ByteArray& data);
+  Exception Flush();
+  Exception Close();
+
+ private:
+  bool is_socket_initiated_ = false;
+  SOCKET socket_ = INVALID_SOCKET;
+};
+
+}  // namespace nearby::windows
+
+#endif  // THIRD_PARTY_NEARBY_INTERNAL_PLATFORM_IMPLEMENTATION_WINDOWS_NEARBY_CLIENT_SOCKET_H_