diff --git a/Client/src/asteroid/main.cpp b/Client/src/asteroid/main.cpp
index 3afaaa4..75f8d7f 100644
--- a/Client/src/asteroid/main.cpp
+++ b/Client/src/asteroid/main.cpp
@@ -18,7 +18,7 @@
  #endif
    utils::ThreadPool tp(0);
    Network::IOCP iocp;
-   iocp.init(&tp, SessionProtocol::TLS);
+   iocp.init(&tp, SessionProtocol::TCP);
 
    Network::Address addr;
    in6_addr in6addr;
@@ -41,9 +41,15 @@
    data->event = Network::IOCPEVENT::WRITE;
    data->wsabuf.buf[0] = 'a';
    data->wsabuf.buf[1] = 'b';
-   data->wsabuf.buf[2] = '\0';
+   data->wsabuf.buf[2] = ' ';
    data->wsabuf.len = 3;
    send_data.push_back(data);
+   Network::IOCPPASSINDATA* data2 = new Network::IOCPPASSINDATA(16 * 1024);
+   data2->wsabuf.buf[0] = 'b';
+   data2->wsabuf.buf[1] = 'a';
+   data2->wsabuf.buf[2] = '\0';
+   data2->wsabuf.len = 3;
+   send_data.push_back(data2);
    iocp.send(sock.sock, &send_data);
 
    Network::IOCPPASSINDATA* recv_data = new Network::IOCPPASSINDATA(16 * 1024);
@@ -53,6 +59,29 @@
 
    spdlog::info("recv_data: {}", recv_data->wsabuf.buf);
 
+   std::vector<Network::IOCPPASSINDATA*> send_data2;
+   data->event = Network::IOCPEVENT::WRITE;
+   data->wsabuf.buf[0] = 'c';
+   data->wsabuf.buf[1] = 'd';
+   data->wsabuf.buf[2] = ' ';
+   data->wsabuf.len = 3;
+   send_data2.push_back(data);
+   data2 = new Network::IOCPPASSINDATA(16 * 1024);
+   data2->wsabuf.buf[0] = 'd';
+   data2->wsabuf.buf[1] = 'c';
+   data2->wsabuf.buf[2] = '\0';
+   data2->wsabuf.len = 3;
+   send_data2.push_back(data2);
+   iocp.send(sock.sock, &send_data2);
+
+   recv_data = new Network::IOCPPASSINDATA(16 * 1024);
+   recv_data->socket = std::make_shared<Network::TCPSocket>(sock);
+   recv_data->IOCPInstance = &iocp;
+   while (!iocp.recv(recv_data));  // 어떤 데이터를 읽는걸 보장받고 싶다면 그냥
+                                   // 스린락 걸어버리기.
+
+   spdlog::info("recv_data: {}", recv_data->wsabuf.buf);
+
    const veng::GlfwInitialization _glfw;
 
    veng::Window window("Vulkan Engine", {800, 600});
diff --git a/impl/socket/iocp.cpp b/impl/socket/iocp.cpp
index b627e3a..6a63e70 100644
--- a/impl/socket/iocp.cpp
+++ b/impl/socket/iocp.cpp
@@ -11,6 +11,29 @@ IOCP::IOCP() {
 
 IOCP::~IOCP() { destruct(); }
 
+void IOCP::init(utils::ThreadPool* __IOCPThread, SessionProtocol proto) {
+  IOCPThread_ = __IOCPThread;
+  proto_ = proto;
+
+#ifdef _WIN32
+  completionPort_ = ::CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
+  if (completionPort_ == NULL) {
+    spdlog::critical("CreateIoCompletionPort()");
+    std::exit(EXIT_FAILURE);
+  }
+  int tCount = __IOCPThread->threadCount;
+
+  spdlog::info("Resizing threadpool size to: {}", tCount * 2);
+
+  __IOCPThread->respawnWorker(tCount * 2);
+
+  for (int i = 0; i < tCount; i++)
+    IOCPThread_->enqueueJob(
+        [this](utils::ThreadPool* th, std::uint8_t __) { iocpWatcher_(th); },
+        0);
+#endif
+}
+
 void IOCP::destruct() {
 #ifdef __linux__
 
@@ -40,7 +63,7 @@ void IOCP::registerSocket(IOCPPASSINDATA* data) {
 #endif
 }
 
-int IOCP::recv(IOCPPASSINDATA* data) {
+int IOCP::recv(IOCPPASSINDATA* data) { //읽은 바이트수가 무조건 100임? 왜..?
   SOCKET sock = data->socket->sock;
   std::lock_guard lock(*GetRecvQueueMutex_(sock));
   auto queue = GetRecvQueue_(sock);
@@ -88,6 +111,73 @@ int IOCP::send(SOCKET sock, std::vector<IOCPPASSINDATA*>* data) {
   return 0;
 }
 
+int IOCP::GetRecvedPacketCount(SOCKET sock) {
+  std::lock_guard lock(socket_mod_mutex_);
+  auto queue = GetRecvQueue_(sock);
+  return queue->size();
+}
+
+void IOCP::iocpWatcher_(utils::ThreadPool* IOCPThread) {
+  IOCPPASSINDATA* data;
+  SOCKET sock;
+  DWORD cbTransfrred;
+  int jitter = jitterDist_(gen_);
+  int retVal = GetQueuedCompletionStatus(completionPort_, &cbTransfrred,
+                                         (PULONG_PTR)&sock,
+                                         (LPOVERLAPPED*)&data, 1000 + jitter);
+
+  if (retVal == 0 || cbTransfrred == 0) {
+    DWORD lasterror = GetLastError();
+    if (lasterror == WAIT_TIMEOUT) {
+      IOCPThread->enqueueJob(
+          [this](utils::ThreadPool* th, std::uint8_t __) { iocpWatcher_(th); },
+          0);
+      return;
+    }
+    data->event = IOCPEVENT::QUIT;
+    spdlog::debug("Disconnected. [{}]",
+                  (std::string)(data->socket->remoteAddr));
+    delete data;
+  } else {
+    data->transferredbytes = cbTransfrred;
+  }
+
+  std::vector<char> buf(16384);  // SSL_read최대 반환 크기
+  int red_data = 0;
+  std::lock_guard lock(*GetRecvQueueMutex_(sock));
+  auto queue_list = GetRecvQueue_(data->socket->sock);
+  if (data->event == IOCPEVENT::READ) {
+    if (proto_ == SessionProtocol::TLS || proto_ == SessionProtocol::QUIC) {
+      ::BIO_write(::SSL_get_rbio(data->ssl.get()), data->wsabuf.buf,
+                  cbTransfrred);
+
+      while ((red_data = ::SSL_read(data->ssl.get(), buf.data(), buf.size())) >
+             0) {
+        queue_list->emplace_back(std::make_pair(
+            std::vector<char>(buf.begin(), buf.begin() + red_data), 0));
+      }
+    } else {
+      ::memcpy(buf.data(), data->wsabuf.buf, data->transferredbytes);
+      queue_list->emplace_back(std::make_pair(
+          std::vector<char>(buf.begin(), buf.begin() + data->transferredbytes),
+          0));
+    }
+    DWORD recvbytes = 0, flags = 0;
+
+    IOCPPASSINDATA* recv_data = new IOCPPASSINDATA(data->bufsize);
+    recv_data->event = IOCPEVENT::READ;
+    recv_data->socket = data->socket;
+
+    delete data;
+    ::WSARecv(recv_data->socket->sock, &recv_data->wsabuf, 1, &recvbytes,
+              &flags, &recv_data->overlapped, NULL);
+  } else {  // WRITE 시, 무시한다.
+    delete data;
+  }
+  IOCPThread->enqueueJob(
+      [this](utils::ThreadPool* th, std::uint8_t __) { iocpWatcher_(th); }, 0);
+}
+
 std::shared_ptr<std::list<IOCPPASSINDATA*>> IOCP::GetSendQueue_(SOCKET sock) {
   std::lock_guard lock(socket_mod_mutex_);
   if (send_queue_.find(sock) == send_queue_.end()) {
diff --git a/include/socket/iocp.h b/include/socket/iocp.h
index 8ca34fa..4c7ab88 100644
--- a/include/socket/iocp.h
+++ b/include/socket/iocp.h
@@ -60,7 +60,7 @@ struct IOCPPASSINDATA {
     std::memset(&overlapped, 0, sizeof(overlapped));
     event = IOCPEVENT::QUIT;
     socket = nullptr;
-    ssl = std::make_shared<SSL>(::SSL_new(ctx), ::SSL_free);
+    ssl = std::shared_ptr<SSL>(::SSL_new(ctx), ::SSL_free);
     ::SSL_set_bio(ssl.get(), ::BIO_new(::BIO_s_mem()),
                   ::BIO_new(::BIO_s_mem()));
     transferredbytes = 0;
@@ -118,100 +118,21 @@ class IOCP {
   IOCP();
   ~IOCP();
 
-  void init(utils::ThreadPool* __IOCPThread, SessionProtocol proto) {
-    IOCPThread_ = __IOCPThread;
-    proto_ = proto;
-
-#ifdef _WIN32
-    completionPort_ =
-        ::CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
-    if (completionPort_ == NULL) {
-      spdlog::critical("CreateIoCompletionPort()");
-      std::exit(EXIT_FAILURE);
-    }
-    int tCount = __IOCPThread->threadCount;
-
-    spdlog::info("Resizing threadpool size to: {}", tCount * 2);
-
-    __IOCPThread->respawnWorker(tCount * 2);
-
-    for (int i = 0; i < tCount; i++)
-      IOCPThread_->enqueueJob(
-          [this](utils::ThreadPool* th, std::uint8_t __) { iocpWatcher_(th); },
-          0);
-#endif
-  }
+  void init(utils::ThreadPool* __IOCPThread, SessionProtocol proto);
 
   void destruct();
 
   void registerSocket(IOCPPASSINDATA* data);
 
+  int recv(IOCPPASSINDATA* data);
   // data는 한 가지 소켓에 보내는 패킷만 담아야 합니다
   int send(SOCKET sock, std::vector<IOCPPASSINDATA*>* data);
-  int recv(IOCPPASSINDATA* data);
+
+  int GetRecvedPacketCount(SOCKET sock);
 
  private:
 #ifdef _WIN32
-  void iocpWatcher_(utils::ThreadPool* IOCPThread) {
-    IOCPPASSINDATA* data;
-    SOCKET sock;
-    DWORD cbTransfrred;
-    int jitter = jitterDist_(gen_);
-    int retVal = GetQueuedCompletionStatus(completionPort_, &cbTransfrred,
-                                           (PULONG_PTR)&sock,
-                                           (LPOVERLAPPED*)&data, 1000 + jitter);
-
-    if (retVal == 0 || cbTransfrred == 0) {
-      DWORD lasterror = GetLastError();
-      if (lasterror == WAIT_TIMEOUT) {
-        IOCPThread->enqueueJob([this](utils::ThreadPool* th,
-                                      std::uint8_t __) { iocpWatcher_(th); },
-                               0);
-        return;
-      }
-      data->event = IOCPEVENT::QUIT;
-      spdlog::debug("Disconnected. [{}]",
-                    (std::string)(data->socket->remoteAddr));
-      delete data;
-    } else {
-      data->transferredbytes = cbTransfrred;
-    }
-
-    std::vector<char> buf(16384);  // SSL_read최대 반환 크기
-    int red_data = 0;
-    auto queue_list = GetRecvQueue_(data->socket->sock);
-    if (data->event == IOCPEVENT::READ) {
-      if (proto_ == SessionProtocol::TLS || proto_ == SessionProtocol::QUIC) {
-        ::BIO_write(::SSL_get_rbio(data->ssl.get()), data->wsabuf.buf,
-                    cbTransfrred);
-
-        while ((red_data =
-                    ::SSL_read(data->ssl.get(), buf.data(), buf.size())) > 0) {
-          queue_list->emplace_back(std::make_pair(
-              std::vector<char>(buf.begin(), buf.begin() + red_data), 0));
-        }
-      } else {
-        ::memcpy(buf.data(), data->wsabuf.buf, data->transferredbytes);
-        queue_list->emplace_back(std::make_pair(
-            std::vector<char>(buf.begin(),
-                              buf.begin() + data->transferredbytes),
-            0));
-      }
-      DWORD recvbytes = 0, flags = 0;
-
-      IOCPPASSINDATA* recv_data = new IOCPPASSINDATA(data->bufsize);
-      recv_data->socket = data->socket;
-
-      delete data;
-      ::WSARecv(recv_data->socket->sock, &recv_data->wsabuf, 1, &recvbytes,
-                &flags, &recv_data->overlapped, NULL);
-    } else {  // WRITE 시, 무시한다.
-      delete data;
-    }
-    IOCPThread->enqueueJob(
-        [this](utils::ThreadPool* th, std::uint8_t __) { iocpWatcher_(th); },
-        0);
-  }
+  void iocpWatcher_(utils::ThreadPool* IOCPThread);
 #elif __linux__
 
 #endif