diff --git a/CMakeLists.txt b/CMakeLists.txt
index c325006..50251c1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@ add_library(tinyrpc
         ${ASM_FILES} 
 )
 
-aux_source_directory(${CMAKE_SOURCE_DIR}/test/cor_reactortest TEST_SRC_LIST)
+aux_source_directory(${CMAKE_SOURCE_DIR}/test/returntest TEST_SRC_LIST)
 
 
 add_executable(test_tinyrpc 
diff --git a/includes/coroutine/coroutine.hpp b/includes/coroutine/coroutine.hpp
index d043636..474359f 100644
--- a/includes/coroutine/coroutine.hpp
+++ b/includes/coroutine/coroutine.hpp
@@ -10,7 +10,9 @@ namespace tinyrpc {
         Coroutine();
     public:
         // Coroutine(std::size_t stack_size, char* stack_sp);
-        Coroutine(std::size_t stack_size/* , char* stack_sp */, std::function<void()> cb);
+
+        Coroutine(std::function<void()> cb, std::size_t stack_size = 1 * 1024 * 1024/* , char* stack_sp */);
+
         // int getCorID() const {return m_cor_id;}
 
         void operator()() const {  // 调用 这个协程的回调
diff --git a/includes/net/fd_event.hpp b/includes/net/fd_event.hpp
index 3a81815..86b4d6a 100644
--- a/includes/net/fd_event.hpp
+++ b/includes/net/fd_event.hpp
@@ -17,6 +17,7 @@ namespace tinyrpc {
         
     public:
         FdEvent() = default;
+        ~FdEvent();
         FdEvent(int fd);
         FdEvent(int fd, Reactor* reactor);
         int getFd() const{return m_fd;}
@@ -41,7 +42,7 @@ namespace tinyrpc {
         Reactor* m_reactor{nullptr};  // 这个fd 所属的 reactor
         int m_listen_events {0};  // 这个fd 关心的事件
 
-        static Reactor::Task  m_default_callback;
+        static Reactor::Task m_default_callback;
     };
 
 
diff --git a/includes/net/reactor.hpp b/includes/net/reactor.hpp
index c639ef5..fc4a581 100644
--- a/includes/net/reactor.hpp
+++ b/includes/net/reactor.hpp
@@ -1,5 +1,5 @@
 #pragma once
-#include "logger.hpp"
+// #include "logger.hpp"
 #include <functional>
 #include <unordered_map>
 #include <vector>
@@ -28,6 +28,7 @@ namespace tinyrpc {
         void modFdEvent(FdEvent* fdEvent);
         void stop();
         void rouse();
+        void addTask(Task task, bool needRouse = false);
         static Reactor* getReactor();
         ~Reactor();
         // void addEvent()
diff --git a/includes/net/tcp/io_thread.hpp b/includes/net/tcp/io_thread.hpp
index b1d8d95..0976653 100644
--- a/includes/net/tcp/io_thread.hpp
+++ b/includes/net/tcp/io_thread.hpp
@@ -1,4 +1,5 @@
 #pragma once
+#include "reactor.hpp"
 #include "tcp_connection.hpp"
 #include <thread>
 #include <unordered_map>
@@ -10,12 +11,16 @@ namespace tinyrpc {
     public:
         IOThread();
         ~IOThread();
-        bool addClient(int fd);
+        void addClient(int fd);
+        static IOThread* getThisIoThread();
+        // void removeFd(int fd);
+        Reactor* getReactor() {return m_reactor;}
     private:
         void mainFunc();     
     private:
         std::unordered_map<int, TcpConnection*> m_clients;
         std::thread m_thread;
+        Reactor* m_reactor{nullptr};
     };
 
 }
\ No newline at end of file
diff --git a/includes/net/tcp/tcp_buffer.hpp b/includes/net/tcp/tcp_buffer.hpp
index 7a68142..bab4911 100644
--- a/includes/net/tcp/tcp_buffer.hpp
+++ b/includes/net/tcp/tcp_buffer.hpp
@@ -7,7 +7,7 @@
 namespace tinyrpc {
     class TcpBuffer {
     public:
-        TcpBuffer(std::size_t size) : m_buffer(size) {
+        TcpBuffer(std::size_t size = 128) : m_buffer(size) {
 
         }
 
@@ -15,7 +15,9 @@ namespace tinyrpc {
             
         }
 
-
+        void dilatation() {
+            resize(m_buffer.size() * 2);
+        }
 
         std::size_t getReadable() const {
             return m_write_index - m_read_index;
@@ -35,8 +37,8 @@ namespace tinyrpc {
 
         void adjustBuffer();
 
-        bool readOffset(std::size_t offset) ;
-        bool writeOffset(std::size_t offset) ;
+        void readOffset(std::size_t offset) ;
+        void writeOffset(std::size_t offset) ;
 
         void clear();
 
diff --git a/includes/net/tcp/tcp_connection.hpp b/includes/net/tcp/tcp_connection.hpp
index 9575aa3..173ea8b 100644
--- a/includes/net/tcp/tcp_connection.hpp
+++ b/includes/net/tcp/tcp_connection.hpp
@@ -1,19 +1,40 @@
 #pragma once
 
-
-
+#include "coroutine.hpp"
 #include "fd_event.hpp"
+#include "reactor.hpp"
+#include "tcp_buffer.hpp"
+
 namespace tinyrpc {
 
     class TcpConnection {
+    public:
+        enum class State{
+            Disconnected,
+            Connected
+        };
+
 
     public:
-        
-        TcpConnection(int fd) : m_fdEvent(fd){};
+        TcpConnection(int fd, Reactor* reactor);
+
+        void mainLoopFun();
 
         ~TcpConnection();
+        
+    private:
+        void input();
+        void output();
+        void process();
+
+        
     private:
         FdEvent m_fdEvent;
+        Coroutine m_mainCoroutine;
+        State m_state{State::Connected};
+        TcpBuffer m_writeBuffer{};
+        TcpBuffer m_readBuffer{};
+        Reactor* m_reactor{};
         // TODO .... 完善 TcpConnection 类
     };
 
diff --git a/includes/net/tcp/tcp_server.hpp b/includes/net/tcp/tcp_server.hpp
index 7db0ef1..64dc4dc 100644
--- a/includes/net/tcp/tcp_server.hpp
+++ b/includes/net/tcp/tcp_server.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include "coroutine.hpp"
+#include "io_thread.hpp"
 #include "net_address.hpp"
 // #include "reactor.hpp"
 
@@ -29,7 +30,7 @@ namespace tinyrpc {
         TcpAcceptor m_acceptor;
         bool m_stop_accept{false};
         // int m_conn_cnt{0};
-
+        IOThread m_ioThread{};
     };
 
 }
\ No newline at end of file
diff --git a/includes/net/timer.hpp b/includes/net/timer.hpp
index b5f6330..6216ec2 100644
--- a/includes/net/timer.hpp
+++ b/includes/net/timer.hpp
@@ -1,7 +1,7 @@
 #pragma once
 #include "fd_event.hpp"
 #include "reactor.hpp"
-
+#include <chrono>
 
 namespace tinyrpc {
 
@@ -10,6 +10,11 @@ namespace tinyrpc {
     public:
         
         Timer(Reactor::Task cb = FdEvent::m_default_callback);
+
+        // TODO 完善
+        // template<typename Rep, typename Period = std::ratio<1>>
+        // void setInterval(std::chrono::duration<Rep, Period> duar);
+
         ~Timer();
     private:
         // TODO .... 完善 Timer 类
diff --git a/src/coroutine/coroutine.cc b/src/coroutine/coroutine.cc
index 159f98f..6eae3da 100644
--- a/src/coroutine/coroutine.cc
+++ b/src/coroutine/coroutine.cc
@@ -41,7 +41,7 @@ namespace tinyrpc {
         logger() << "main coroutine has built";
     }
 
-    Coroutine::Coroutine(std::size_t stack_size/* , char* stack_sp */, std::function<void()> cb) : 
+    Coroutine::Coroutine( std::function<void()> cb, std::size_t stack_size /* = 1 * 1024 * 1024 *//* , char* stack_sp */): 
             m_stack_sp(static_cast<char*>(malloc(stack_size))), 
             m_stack_size(stack_size), 
             m_callback(cb) 
diff --git a/src/net/fd_event.cc b/src/net/fd_event.cc
index 3efdfa1..0a21c66 100644
--- a/src/net/fd_event.cc
+++ b/src/net/fd_event.cc
@@ -20,6 +20,10 @@ namespace tinyrpc {
     FdEvent::FdEvent(int fd, Reactor* reactor) : m_fd(fd), m_reactor(reactor) {
 
     }
+    FdEvent:: ~FdEvent() {
+        // if(m_fd != -1)
+        //     close(m_fd);
+    }
 
     bool FdEvent::setNonblock() {
         if (m_fd < 0) {
diff --git a/src/net/reactor.cc b/src/net/reactor.cc
index e97582d..61b0767 100644
--- a/src/net/reactor.cc
+++ b/src/net/reactor.cc
@@ -27,7 +27,7 @@ namespace tinyrpc {
     }
 
 
-    Reactor::Reactor(ReactorType type)
+    Reactor::Reactor(ReactorType type) : m_type(type)
     {
         if(t_reactor != nullptr) {
             logger() << "this thread has already create a reactor";
@@ -124,9 +124,9 @@ namespace tinyrpc {
   
             processAllTasks();
 
-            logger() << "before epoll_wait";
+            logger() << (m_type == Sub ? "sub " : "main ") <<"before epoll_wait";
             int num = epoll_wait(m_epfd,  events, EPOLL_EVENT_MAX_LEN, -1);
-            logger() << "wakeup";
+            logger() << (m_type == Sub ? "sub " : "main ") << "wakeup";
             
             if(num < 0) {
                 logger() << "epoll_wait ret -1 err:" << strerror(errno);
@@ -153,19 +153,13 @@ namespace tinyrpc {
 
                 if(events[i].events & EPOLLIN) {
                     Task cb = m_listen_fd_events[curFd]->getHandler(IOEvent::READ);
-                    {
-                        std::lock_guard<std::mutex> lock(m_tasks_mtx);
-                        m_tasks.push_back(cb);
-                    }
+                    addTask(cb);
                     
                 }
 
                 if(events[i].events & EPOLLOUT) {
                     Task cb = m_listen_fd_events[curFd]->getHandler(IOEvent::WRITE);
-                    {
-                        std::lock_guard<std::mutex> lock(m_tasks_mtx);
-                        m_tasks.push_back(cb);
-                    }
+                    addTask(cb);
                     
                 }
 
@@ -208,8 +202,7 @@ namespace tinyrpc {
             task();
         } else {
             
-            std::lock_guard<std::mutex> lock(m_tasks_mtx);
-            m_tasks.push_back(task);
+            addTask(task);
             
         }
         rouse();
@@ -230,8 +223,7 @@ namespace tinyrpc {
             task();
         } else {
             
-            std::lock_guard<std::mutex> lock(m_tasks_mtx);
-            m_tasks.push_back(task);
+            addTask(task);
                
         }
         rouse();
@@ -257,14 +249,22 @@ namespace tinyrpc {
             task();
         } else {
             
-            std::lock_guard<std::mutex> lock(m_tasks_mtx);
-            m_tasks.push_back(task);
+            addTask(task);
             
         }
         rouse();
 
     }
 
+    void Reactor::addTask(Task task, bool needRouse/*  = false */) {
+        {
+            std::lock_guard<std::mutex> lock(m_tasks_mtx);
+            m_tasks.push_back(task);
+        }
+        if(needRouse)
+            rouse();
+    }
+
     Reactor::~Reactor()
     {
         m_is_stop = true;
diff --git a/src/net/tcp/io_thread.cc b/src/net/tcp/io_thread.cc
index 6c3813a..6c2ef90 100644
--- a/src/net/tcp/io_thread.cc
+++ b/src/net/tcp/io_thread.cc
@@ -9,25 +9,28 @@
 namespace tinyrpc {
     static thread_local Reactor* t_reactor = nullptr;
     static thread_local IOThread* t_ioThread = nullptr;
-    IOThread::IOThread() : m_thread(&IOThread::mainFunc, this) {
-        
-    }   
 
-    IOThread::~IOThread() {
-        if(m_thread.joinable()) {
-            m_thread.join();
-        }
-        for(auto& conn : m_clients) {
-            delete conn.second;
-        }
-        m_clients.clear();
+
+    // static IOThread* getThisIoThread() {
+    //     return t_ioThread;
+    // }
+
+    IOThread::IOThread() : m_thread(&IOThread::mainFunc, this) {
+        logger() << "IO Thread is built";
     }
 
-    bool IOThread::addClient(int fd) {
-        if(m_clients.count(fd)) 
-            return false;
-        m_clients.insert({fd, new TcpConnection(fd)});
-        return true;
+    // void IOThread::removeFd(int fd) { // TODO 加锁 ?
+    //     auto it = m_clients.find(fd);
+    //     if(it == m_clients.end()) return;
+    //     delete it->second;
+    //     m_clients.erase(it);
+    // }
+
+    void IOThread::addClient(int fd) {
+        if(m_clients.count(fd)) {
+            delete m_clients[fd];
+        }
+        m_clients.insert({fd, new TcpConnection(fd, m_reactor)});
     }
 
     void IOThread::mainFunc() {
@@ -42,8 +45,20 @@ namespace tinyrpc {
         }
         
         t_ioThread = this;
-        t_reactor = new Reactor(Reactor::ReactorType::Sub);
+        m_reactor = t_reactor = new Reactor(Reactor::ReactorType::Sub);
         Coroutine::getMainCoroutine(); // 创建协程
-        t_reactor->loop();
+        m_reactor->loop();
+    }
+
+    IOThread::~IOThread() {
+        m_reactor->stop();
+        if(m_thread.joinable()) {
+            m_thread.join();
+        }
+        delete m_reactor;
+        for(auto& conn : m_clients) {
+            delete conn.second;
+        }
+        m_clients.clear();
     }
 }
\ No newline at end of file
diff --git a/src/net/tcp/tcp_buffer.cc b/src/net/tcp/tcp_buffer.cc
index d6a2e65..765b7bb 100644
--- a/src/net/tcp/tcp_buffer.cc
+++ b/src/net/tcp/tcp_buffer.cc
@@ -19,25 +19,25 @@ namespace tinyrpc {
     }
 
 
-    bool TcpBuffer::readOffset(std::size_t offset)  {
-        int newReadIdx = m_read_index + offset;
+    void TcpBuffer::readOffset(std::size_t offset)  {
+        std::size_t newReadIdx = m_read_index + offset;
         if(newReadIdx > m_write_index) {
             logger() << "read index overflow write index"; 
-            return false;
+            return;
         }
         m_read_index = newReadIdx;
         if(getWriteable() < m_read_index) {
             adjustBuffer();
         }
-        return true;
+
     }
 
-    bool TcpBuffer::writeOffset(std::size_t offset)  {
-        int newWriteIdx = m_write_index + offset;
+    void TcpBuffer::writeOffset(std::size_t offset)  {
+        std::size_t newWriteIdx = m_write_index + offset;
 
         if(newWriteIdx > m_buffer.size()) {
             logger() << "newReadIdx overflow buffer size"; 
-            return false;
+     
         }
 
         m_write_index = newWriteIdx;
@@ -46,7 +46,6 @@ namespace tinyrpc {
             adjustBuffer();
         }
 
-        return true;
     }
 
     void TcpBuffer::clear() {
diff --git a/src/net/tcp/tcp_connection.cc b/src/net/tcp/tcp_connection.cc
index e69de29..e9e185c 100644
--- a/src/net/tcp/tcp_connection.cc
+++ b/src/net/tcp/tcp_connection.cc
@@ -0,0 +1,121 @@
+#include "tcp_connection.hpp"
+// #include "io_thread.hpp"
+#include "coroutine_hook.hpp"
+#include "fd_event.hpp"
+#include "io_thread.hpp"
+#include "logger.hpp"
+#include "reactor.hpp"
+#include <cerrno>
+#include <cstring>
+#include <pthread.h>
+
+
+namespace tinyrpc {
+    TcpConnection::TcpConnection(int fd, Reactor* reactor)  : 
+        m_fdEvent(fd), 
+        m_mainCoroutine(std::bind(&TcpConnection::mainLoopFun, this)),
+        m_reactor(reactor)
+    {
+        logger();
+        Reactor::Task task = [this] {
+            logger() << "conn coroutine is resume";
+            m_mainCoroutine.resume();
+        };
+
+        reactor->addTask(task, true);
+
+    }
+
+    void TcpConnection::mainLoopFun() {
+        while(m_state == State::Connected) {
+            // TODO
+            input();
+            process();
+            output();
+        }
+        logger() << "this conn loop has already break";
+    }
+
+    void TcpConnection::input() { // 调用 read_hook 读数据到应用层缓冲区
+        logger() << "input";
+        if(m_state == State::Disconnected) {
+            logger() << "input: this conn has already break";
+            return;
+        }
+
+
+        while(true) {
+            if(m_readBuffer.getWriteable() == 0) {
+                m_readBuffer.dilatation();
+            }
+            
+
+            int ret = read_hook(m_fdEvent.getFd(), m_readBuffer.getWriteAddress(), m_readBuffer.getWriteable());
+            if(ret == -1) {
+                logger() << "read_hook ret -1 err:" << strerror(errno); 
+                if(errno != EAGAIN) {
+                    break;
+                }
+            } else if(ret == 0) { // 对端关闭了连接
+                m_state = State::Disconnected;
+                m_reactor->delFdEvent(&m_fdEvent);
+                close(m_fdEvent.getFd());
+                // IOThread::getThisIoThread()->removeFd(m_fdEvent.getFd());
+                break;
+            } else {
+                int writeable = m_readBuffer.getWriteable();
+                m_readBuffer.writeOffset(ret);
+                logger() << "input_hook ret: " << ret;
+
+                if(ret < writeable) { // 读完了结束循环
+                    break;
+                }
+
+            }
+
+        }
+
+
+    }
+    void TcpConnection::output() {
+        logger() << "output";
+        if(m_state == State::Disconnected) {
+            return;
+        }
+
+        while(true) {
+            if(m_writeBuffer.getReadable() == 0) {
+                logger() << "no data need send";
+                break;
+            }
+
+            int ret = write_hook(m_fdEvent.getFd(), m_writeBuffer.getReadAddress(), m_writeBuffer.getReadable());
+            if(ret == -1) {
+                logger() << "read_hook ret -1 err:" << strerror(errno); 
+                break;
+                
+            } else if(ret == 0) { 
+                logger() << "write_hook ret 0"; 
+                break;
+            } else {
+                m_writeBuffer.readOffset(ret);
+            }
+            logger() << "write_hook ret: " << ret;
+        }
+
+
+    }
+    void TcpConnection::process() {
+        
+        std::memcpy(m_writeBuffer.getWriteAddress(), m_readBuffer.getReadAddress(), m_readBuffer.getReadable());
+        m_writeBuffer.writeOffset(m_readBuffer.getReadable());
+        m_readBuffer.readOffset(m_readBuffer.getReadable());
+        
+        logger() << "write data " << m_writeBuffer.getReadable()  << " byte";
+    }
+    TcpConnection::~TcpConnection() {
+        m_state = State::Disconnected;
+        
+    }
+
+}
\ No newline at end of file
diff --git a/src/net/tcp/tcp_server.cc b/src/net/tcp/tcp_server.cc
index 1fc4410..ac7328c 100644
--- a/src/net/tcp/tcp_server.cc
+++ b/src/net/tcp/tcp_server.cc
@@ -58,13 +58,13 @@ namespace tinyrpc {
 
 
     TcpServer::TcpServer() : 
-        m_accept_cor(1 * 1024 * 1024, std::bind(&TcpServer::mainAcceptCorFun, this)),
+        m_accept_cor(std::bind(&TcpServer::mainAcceptCorFun, this)),
         m_acceptor(NetAddress())
     {
 
     }
     TcpServer::TcpServer(const NetAddress& addr) : 
-        m_accept_cor(1 * 1024 * 1024, std::bind(&TcpServer::mainAcceptCorFun, this)),
+        m_accept_cor(std::bind(&TcpServer::mainAcceptCorFun, this)),
         m_acceptor(addr)
     {
         m_acceptor.init();
@@ -78,6 +78,7 @@ namespace tinyrpc {
 
     void TcpServer::mainAcceptCorFun() {
         while(!m_stop_accept) {
+            logger();
             int fd = m_acceptor.accept();
             if(fd == -1) {
                 logger() << "m_acceptor.accept() ret -1 yeild this coroutine";
@@ -89,7 +90,8 @@ namespace tinyrpc {
             // close(fd);
             // TODO ...
             // 添加 fd 到子 reactor 中
-
+            logger() << " 添加 fd 到子 reactor 中";
+            m_ioThread.addClient(fd);
         }
         
     }
diff --git a/test/returntest/main.cc b/test/returntest/main.cc
new file mode 100644
index 0000000..545e563
--- /dev/null
+++ b/test/returntest/main.cc
@@ -0,0 +1,13 @@
+#include "tcp_server.hpp"
+#include <iostream>
+
+using namespace std;
+using namespace tinyrpc;
+
+int main() {
+
+
+    TcpServer server(NetAddress(9001));
+    server.start();
+    return 0;
+}
\ No newline at end of file