examples: Asio tests consolidation to use loopback interface

Closes IDF-3072


* Original commit: espressif/esp-idf@a06357ab62

examples/protocols/asio/asio_chat/CMakeLists.txt

@@ -7,4 +7,4 @@ cmake_minimum_required(VERSION 3.5)
 set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/protocol_examples_common)
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
-project(asio_chat_client)
+project(asio_chat)

examples/protocols/asio/asio_chat/Makefile

@@ -2,7 +2,7 @@
 # This is a project Makefile. It is assumed the directory this Makefile resides in is a
 # project subdirectory.
 #
-PROJECT_NAME := asio_chat_server
+PROJECT_NAME := asio_chat
 
 EXTRA_COMPONENT_DIRS = $(IDF_PATH)/examples/common_components/protocol_examples_common
 

examples/protocols/asio/asio_chat/README.md

@@ -0,0 +1,62 @@
+
+# Asio chat client and server examples
+
+(See the README.md file in the upper level 'examples' directory for more information about examples.)
+
+The application aims to demonstrate a simple use of Asio library in different modes.
+In project settings it could be configured to run either a Asio chat server, a Asio chat client, or both.
+
+## How to use example
+
+The example is configured by default as an Asio chat client.
+
+Note that the example uses string representation of IP addresses and ports.
+
+You can find the upstream asio chat implementation [here] https://github.com/chriskohlhoff/asio/tree/master/asio/src/examples/cpp11/chat
+
+### Asio Client
+
+In the client mode, the example connects to the configured address, sends the message, which was inserted as an input in the terminal, and receives a response.
+
+### Asio Server
+
+In the server mode, Asio chat server with a specified port number is created and being polled till a connection request from the client arrives.
+Chat server echoes a message (received from any client) to all connected clients.
+
+## Configure the project
+
+```
+idf.py menuconfig
+```
+
+Set following parameters under Example Configuration Options:
+
+* Set `EXAMPLE_CHAT_SERVER` to use the example as an ASIO chat server
+    * Configure `EXAMPLE_CHAT_SERVER_BIND_PORT` to the port number.
+
+* Set `EXAMPLE_CHAT_CLIENT` to use the example as an ASIO chat client
+    * Configure `EXAMPLE_CHAT_CLIENT_CONNECT_ADDRESS` to a string representation of the address to connect the client to.
+    * Configure `EXAMPLE_CHAT_CLIENT_CONNECT_PORT` to the port number.
+
+* Configure Wi-Fi or Ethernet under "Example Connection Configuration" menu. See "Establishing Wi-Fi or Ethernet Connection" section in [examples/protocols/README.md](../../README.md) for more d    etails.
+
+## Running the example in server mode
+
+- Configure the example according "Configure the project" section.
+- Run `idf.py -p PORT flash monitor` to build and upload the example to your board and connect to it's serial terminal.
+- Wait for the board to connect to WiFi or Ethernet (note the IP address).
+- Connect to the server using multiple clients, for example using any option below.
+    - build and run asio chat client on your host machine
+    - run chat_client asio example on ESP platform
+    - since chat messages consists of ASCII size and message, it is possible to 
+        netcat `nc IP PORT` and type for example ` 4ABC<CR>` to transmit 'ABC\n'
+
+## Running the example in client mode
+
+- Configure the example according "Configure the project" section.
+- Start chat server either on host machine or as another ESP device running chat_server example.
+- Run `idf.py -p PORT flash monitor` to build and upload the example to your board and connect to it's serial terminal.
+- Wait for the board to connect to WiFi or Ethernet.
+- Receive and send messages to/from other clients on stdin/stdout via serial terminal.
+
+See the README.md file in the upper level 'examples' directory for more information about examples.

examples/protocols/asio/asio_chat/example_test.py

@@ -0,0 +1,29 @@
+# This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+# Unless required by applicable law or agreed to in writing, this
+# software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied.
+
+# -*- coding: utf-8 -*-
+
+from __future__ import print_function, unicode_literals
+
+import re
+
+import ttfw_idf
+
+
+@ttfw_idf.idf_example_test(env_tag='Example_GENERIC')
+def test_examples_asio_chat(env, _):  # type: (ttfw_idf.TinyFW.Env, None) -> None
+    msg = 'asio-chat: received hi'
+    dut = env.get_dut('asio_chat', 'examples/protocols/asio/asio_chat')
+    # start the test and expect the client to receive back it's original data
+    dut.start_app()
+    dut.expect(re.compile(r'{}'.format('Waiting for input')), timeout=30)
+    dut.write(msg)
+    dut.write('exit')
+    dut.expect(re.compile(r'{}'.format(msg)), timeout=30)
+
+
+if __name__ == '__main__':
+    test_examples_asio_chat()

examples/protocols/asio/asio_chat/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRCS "asio_chat.cpp"
+                    INCLUDE_DIRS ".")

examples/protocols/asio/asio_chat/main/Kconfig.projbuild

@@ -0,0 +1,39 @@
+menu "Example Configuration"
+
+    config EXAMPLE_CHAT_SERVER
+        bool "Asio example chat server"
+        default n
+        help
+            This example will setup a chat server, binds it to the specified address
+            and starts listening.
+
+    if EXAMPLE_CHAT_SERVER
+        config EXAMPLE_CHAT_SERVER_BIND_PORT
+            string "Asio example server bind port"
+            default "3344"
+            help
+                Server listener's socket would be bound to this port.
+    endif
+
+    config EXAMPLE_CHAT_CLIENT
+        bool "Asio example chat client"
+        default y
+        help
+            This example will setup an asio chat client.
+            and sends the data.
+
+    if EXAMPLE_CHAT_CLIENT
+        config EXAMPLE_CHAT_CLIENT_CONNECT_ADDRESS
+            string "Client connection address"
+            default "192.168.0.1"
+            help
+                Client's socket would connect to this address/host.
+
+        config EXAMPLE_CHAT_CLIENT_CONNECT_PORT
+            string "Client connection port"
+            default "3344"
+            help
+                Client's connection port.
+    endif
+
+endmenu

examples/protocols/asio/asio_chat/main/asio_chat.cpp

@@ -0,0 +1,119 @@
+/* ASIO chat server client example
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#include "protocol_examples_common.h"
+#include "esp_log.h"
+#include "esp_event.h"
+#include "nvs_flash.h"
+#include "server.hpp"
+#include "client.hpp"
+#include <thread>
+#include <pthread.h>
+
+using asio::ip::tcp;
+
+static const char *TAG = "asio-chat";
+
+// This variable is necessary for `python test` execution, it provides synchronisation between server/client(as server should be started before client)
+std::mutex server_ready;
+
+#ifdef CONFIG_EXAMPLE_CHAT_CLIENT
+static void get_string(char *line, size_t size)
+{
+    int count = 0;
+    while (count < size) {
+        int c = fgetc(stdin);
+        if (c == '\n') {
+            line[count] = '\0';
+            break;
+        } else if (c > 0 && c < 127) {
+            line[count] = c;
+            ++count;
+        }
+        vTaskDelay(10 / portTICK_PERIOD_MS);
+    }
+}
+
+void start_client(void)
+{
+    const std::string port(CONFIG_EXAMPLE_CHAT_CLIENT_CONNECT_PORT);
+    const std::string name(CONFIG_EXAMPLE_CHAT_CLIENT_CONNECT_ADDRESS);
+    asio::io_context io_context;
+    char line[128];
+
+    tcp::resolver resolver(io_context);
+    auto endpoints = resolver.resolve(name, port);
+    chat_client c(io_context, endpoints);
+#ifdef CONFIG_EXAMPLE_CHAT_SERVER
+    std::lock_guard<std::mutex> guard(server_ready);
+#endif
+    std::thread t([&io_context]() { try {
+                                        io_context.run();
+                                  } catch (const std::exception &e) {
+                                        ESP_LOGE(TAG, "Exception occured during client thread execution %s", e.what());
+                                  }
+                                    catch (...) {
+                                         ESP_LOGE(TAG, "Unknown exception");
+                                   }});
+    do {
+        ESP_LOGI(TAG, "CLIENT: Waiting for input");
+        get_string(line, sizeof(line));
+
+        chat_message msg;
+        msg.body_length(std::strlen(line));
+        std::memcpy(msg.body(), line, msg.body_length());
+        msg.encode_header();
+        c.write(msg);
+        sleep(1);
+    } while (strcmp(line, "exit") != 0);
+
+    c.close();
+    t.join();
+}
+#endif // CONFIG_EXAMPLE_CHAT_CLIENT
+
+extern "C" void app_main(void)
+{
+    ESP_ERROR_CHECK(nvs_flash_init());
+    esp_netif_init();
+    ESP_ERROR_CHECK(esp_event_loop_create_default());
+
+    /* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
+     * Read "Establishing Wi-Fi or Ethernet Connection" section in
+     * examples/protocols/README.md for more information about this function.
+     */
+    ESP_ERROR_CHECK(example_connect());
+
+    try {
+#ifdef CONFIG_EXAMPLE_CHAT_SERVER
+        asio::io_context io_context;
+        chat_server server(io_context, tcp::endpoint(tcp::v4(), std::atoi(CONFIG_EXAMPLE_CHAT_SERVER_BIND_PORT)));
+        std::thread t =  std::thread([&io_context]() { // Chat server starting here
+                                     try {
+                                           io_context.run();
+                                     } catch (const std::exception &e) {
+                                           ESP_LOGE(TAG, "Exception occured during server thread execution %s", e.what());
+                                     }
+                                       catch (...) {
+                                           ESP_LOGE(TAG, "Unknown exception");
+                                     }});;
+#endif
+#ifdef CONFIG_EXAMPLE_CHAT_CLIENT
+        start_client();
+#endif
+#ifdef CONFIG_EXAMPLE_CHAT_SERVER
+        t.join();
+#endif
+    } catch (const std::exception &e) {
+        ESP_LOGE(TAG, "Exception occured during run %s", e.what());
+    } catch (...) {
+        ESP_LOGE(TAG, "Unknown exception");
+    }
+    ESP_ERROR_CHECK(example_disconnect());
+}

examples/protocols/asio/asio_chat/main/client.hpp

@@ -0,0 +1,126 @@
+//
+// client.hpp
+// ~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef CHAT_CLIENT_HPP
+#define CHAT_CLIENT_HPP
+
+#include <deque>
+#include "asio.hpp"
+#include "chat_message.hpp"
+
+typedef std::deque<chat_message> chat_message_queue;
+
+class chat_client
+{
+public:
+  chat_client(asio::io_context& io_context,
+      const asio::ip::tcp::resolver::results_type& endpoints)
+    : io_context_(io_context),
+      socket_(io_context)
+  {
+    do_connect(endpoints);
+  }
+
+  void write(const chat_message& msg)
+  {
+    asio::post(io_context_,
+        [this, msg]()
+        {
+          bool write_in_progress = !write_msgs_.empty();
+          write_msgs_.push_back(msg);
+          if (!write_in_progress)
+          {
+            do_write();
+          }
+        });
+  }
+
+  void close()
+  {
+    asio::post(io_context_, [this]() { socket_.close(); });
+  }
+
+private:
+void do_connect(const asio::ip::tcp::resolver::results_type& endpoints)
+    {
+      asio::async_connect(socket_, endpoints,
+          [this](std::error_code ec, asio::ip::tcp::endpoint)
+          {
+            if (!ec)
+            {
+              do_read_header();
+            }
+          });
+    }
+
+    void do_read_header()
+    {
+      asio::async_read(socket_,
+          asio::buffer(read_msg_.data(), chat_message::header_length),
+          [this](std::error_code ec, std::size_t /*length*/)
+          {
+            if (!ec && read_msg_.decode_header())
+            {
+              do_read_body();
+            }
+            else
+            {
+              socket_.close();
+            }
+          });
+    }
+
+    void do_read_body()
+    {
+      asio::async_read(socket_,
+          asio::buffer(read_msg_.body(), read_msg_.body_length()),
+          [this](std::error_code ec, std::size_t /*length*/)
+          {
+            if (!ec)
+            {
+              do_read_header();
+            }
+            else
+            {
+              socket_.close();
+            }
+          });
+    }
+
+     void do_write()
+     {
+      asio::async_write(socket_,
+          asio::buffer(write_msgs_.front().data(),
+            write_msgs_.front().length()),
+          [this](std::error_code ec, std::size_t /*length*/)
+          {
+            if (!ec)
+            {
+              write_msgs_.pop_front();
+              if (!write_msgs_.empty())
+              {
+                do_write();
+              }
+            }
+            else
+            {
+              socket_.close();
+            }
+          });
+      }
+
+private:
+    asio::io_context& io_context_;
+    asio::ip::tcp::socket socket_;
+    chat_message read_msg_;
+    chat_message_queue write_msgs_;
+};
+
+#endif // CHAT_CLIENT_HPP

examples/protocols/asio/asio_chat/main/server.hpp

@@ -1,5 +1,5 @@
 //
-// chat_server.cpp
+// server.hpp
 // ~~~~~~~~~~~~~~~
 //
 // Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
@@ -8,28 +8,25 @@
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#include <cstdlib>
+#ifndef CHAT_SERVER_HPP
-#include <deque>
+#define CHAT_SERVER_HPP
-#include <iostream>
+
 #include <list>
-#include <memory>
 #include <set>
+#include <deque>
 #include <utility>
 #include "asio.hpp"
 #include "chat_message.hpp"
-#include "protocol_examples_common.h"
-#include "esp_event.h"
-#include "nvs_flash.h"
-
-
-using asio::ip::tcp;
 
 //----------------------------------------------------------------------
 
 typedef std::deque<chat_message> chat_message_queue;
 
+extern std::mutex server_ready;
+
 //----------------------------------------------------------------------
 
+
 class chat_participant
 {
 public:
@@ -74,12 +71,13 @@ private:
 
 //----------------------------------------------------------------------
 
+
 class chat_session
   : public chat_participant,
     public std::enable_shared_from_this<chat_session>
 {
 public:
-  chat_session(tcp::socket socket, chat_room& room)
+  chat_session(asio::ip::tcp::socket socket, chat_room& room)
     : socket_(std::move(socket)),
       room_(room)
   {
@@ -129,6 +127,7 @@ private:
          {
            if (!ec)
            {
+             ESP_LOGD("asio-chat:", "%s", read_msg_.body());
              room_.deliver(read_msg_);
              do_read_header();
            }
@@ -162,11 +161,11 @@ private:
          });
    }
 
-  tcp::socket socket_;
+   asio::ip::tcp::socket socket_;
    chat_room& room_;
    chat_message read_msg_;
    chat_message_queue write_msgs_;
-};
+ };
 
 //----------------------------------------------------------------------
 
@@ -174,7 +173,7 @@ class chat_server
 {
 public:
   chat_server(asio::io_context& io_context,
-      const tcp::endpoint& endpoint)
+      const asio::ip::tcp::endpoint& endpoint)
     : acceptor_(io_context, endpoint)
   {
     do_accept();
@@ -183,8 +182,9 @@ public:
 private:
   void do_accept()
   {
+    std::lock_guard<std::mutex> guard(server_ready);
     acceptor_.async_accept(
-        [this](std::error_code ec, tcp::socket socket)
+       [this](std::error_code ec, asio::ip::tcp::socket socket)
        {
          if (!ec)
          {
@@ -195,37 +195,8 @@ private:
        });
   }
 
-  tcp::acceptor acceptor_;
+  asio::ip::tcp::acceptor acceptor_;
   chat_room room_;
 };
 
-//----------------------------------------------------------------------
+#endif // CHAT_SERVER_HPP
-
-extern "C" void app_main(void)
-{
-    ESP_ERROR_CHECK(nvs_flash_init());
-    esp_netif_init();
-    ESP_ERROR_CHECK(esp_event_loop_create_default());
-
-    /* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
-     * Read "Establishing Wi-Fi or Ethernet Connection" section in
-     * examples/protocols/README.md for more information about this function.
-     */
-    ESP_ERROR_CHECK(example_connect());
-
-    /* This helper function configures blocking UART I/O */
-    ESP_ERROR_CHECK(example_configure_stdin_stdout());
-
-    asio::io_context io_context;
-
-    std::list<chat_server> servers;
-
-    {
-      tcp::endpoint endpoint(tcp::v4(), std::atoi(CONFIG_EXAMPLE_PORT));
-      servers.emplace_back(io_context, endpoint);
-    }
-
-    std::cout << "ASIO engine is up and running" << std::endl;
-
-    io_context.run();
-}

examples/protocols/asio/asio_chat/sdkconfig.ci

@@ -0,0 +1,6 @@
+CONFIG_EXAMPLE_CONNECT_WIFI=n
+CONFIG_EXAMPLE_CONNECT_ETHERNET=n
+CONFIG_EXAMPLE_CHAT_CLIENT=y
+CONFIG_EXAMPLE_CHAT_SERVER=y
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y
+CONFIG_EXAMPLE_CHAT_CLIENT_CONNECT_ADDRESS="localhost"

examples/protocols/asio/asio_chat/sdkconfig.defaults

@@ -0,0 +1,2 @@
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
+CONFIG_COMPILER_CXX_EXCEPTIONS=y

examples/protocols/asio/chat_client/Makefile

@@ -1,9 +0,0 @@
-#
-# This is a project Makefile. It is assumed the directory this Makefile resides in is a
-# project subdirectory.
-#
-PROJECT_NAME := asio_chat_client
-
-EXTRA_COMPONENT_DIRS = $(IDF_PATH)/examples/common_components/protocol_examples_common
-
-include $(IDF_PATH)/make/project.mk

examples/protocols/asio/chat_client/README.md

@@ -1,20 +0,0 @@
-# Asio chat client example
-
-Simple Asio chat client using WiFi STA or Ethernet.
-
-## Example workflow
-
-- Wi-Fi or Ethernet connection is established, and IP address is obtained.
-- Asio chat client connects to the corresponding server whose port number and IP are defined through the project configuration menu.
-- Chat client receives all messages from other chat clients, also it sends message received from stdin using `idf.py -p PORT monitor`.
-
-## Running the example
-
-- Open the project configuration menu (`idf.py menuconfig`) to configure Wi-Fi or Ethernet. See "Establishing Wi-Fi or Ethernet Connection" section in [examples/protocols/README.md](../../README.md) for more details.
-- Set server IP address and port number in menuconfig, "Example configuration".
-- Start chat server either on host machine or as another ESP device running chat_server example.
-- Run `idf.py -p PORT flash monitor` to build and upload the example to your board and connect to it's serial terminal.
-- Wait for the board to connect to WiFi or Ethernet.
-- Receive and send messages to/from other clients on stdin/stdout via serial terminal.
-
-See the README.md file in the upper level 'examples' directory for more information about examples.

examples/protocols/asio/chat_client/asio_chat_client_test.py

@@ -1,94 +0,0 @@
-import os
-import re
-import socket
-import time
-from threading import Thread
-
-import ttfw_idf
-
-global g_client_response
-global g_msg_to_client
-
-g_client_response = b''
-g_msg_to_client = b'   3XYZ'
-
-
-def get_my_ip():
-    s1 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    s1.connect(('8.8.8.8', 80))
-    my_ip = s1.getsockname()[0]
-    s1.close()
-    return my_ip
-
-
-def chat_server_sketch(my_ip):
-    global g_client_response
-    print('Starting the server on {}'.format(my_ip))
-    port = 2222
-    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    s.settimeout(600)
-    s.bind((my_ip, port))
-    s.listen(1)
-    q,addr = s.accept()
-    print('connection accepted')
-    q.settimeout(30)
-    q.send(g_msg_to_client)
-    data = q.recv(1024)
-    # check if received initial empty message
-    if (len(data) > 4):
-        g_client_response = data
-    else:
-        g_client_response = q.recv(1024)
-        print('received from client {}'.format(g_client_response))
-    s.close()
-    print('server closed')
-
-
-@ttfw_idf.idf_example_test(env_tag='Example_WIFI_Protocols')
-def test_examples_protocol_asio_chat_client(env, extra_data):
-    """
-    steps: |
-      1. Test to start simple tcp server
-      2. `dut1` joins AP
-      3. Test injects server IP to `dut1`via stdin
-      4. Test evaluates `dut1` receives a message server placed
-      5. Test injects a message to `dut1` to be sent as chat_client message
-      6. Test evaluates received test message in host server
-    """
-    global g_client_response
-    global g_msg_to_client
-    test_msg = 'ABC'
-    dut1 = env.get_dut('chat_client', 'examples/protocols/asio/chat_client', dut_class=ttfw_idf.ESP32DUT)
-    # check and log bin size
-    binary_file = os.path.join(dut1.app.binary_path, 'asio_chat_client.bin')
-    bin_size = os.path.getsize(binary_file)
-    ttfw_idf.log_performance('asio_chat_client_size', '{}KB'.format(bin_size // 1024))
-    # 1. start a tcp server on the host
-    host_ip = get_my_ip()
-    thread1 = Thread(target=chat_server_sketch, args=(host_ip,))
-    thread1.start()
-    # 2. start the dut test and wait till client gets IP address
-    dut1.start_app()
-    dut1.expect(re.compile(r' IPv4 address: ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)'), timeout=30)
-    # 3. send host's IP to the client i.e. the `dut1`
-    dut1.write(host_ip)
-    # 4. client `dut1` should receive a message
-    dut1.expect(g_msg_to_client[4:].decode())  # Strip out the front 4 bytes of message len (see chat_message protocol)
-    # 5. write test message from `dut1` chat_client to the server
-    dut1.write(test_msg)
-    while len(g_client_response) == 0:
-        time.sleep(1)
-    g_client_response = g_client_response.decode()
-    print(g_client_response)
-    # 6. evaluate host_server received this message
-    if (g_client_response[4:7] == test_msg):
-        print('PASS: Received correct message')
-        pass
-    else:
-        print('Failure!')
-        raise ValueError('Wrong data received from asi tcp server: {} (expected:{})'.format(g_client_response[4:7], test_msg))
-    thread1.join()
-
-
-if __name__ == '__main__':
-    test_examples_protocol_asio_chat_client()

examples/protocols/asio/chat_client/main/CMakeLists.txt

@@ -1,2 +0,0 @@
-idf_component_register(SRCS "chat_client.cpp"
-                    INCLUDE_DIRS ".")

examples/protocols/asio/chat_client/main/Kconfig.projbuild

@@ -1,16 +0,0 @@
-menu "Example Configuration"
-
-    config EXAMPLE_PORT
-        string "Asio example server port number"
-        default "2222"
-        help
-            Port number used by Asio example.
-
-    config EXAMPLE_SERVER_IP
-        string "Asio example server ip"
-        default "FROM_STDIN"
-        help
-            Asio example server ip for this client to connect to.
-            Leave default "FROM_STDIN" to enter the server address via serial terminal.
-
-endmenu

examples/protocols/asio/chat_client/main/chat_client.cpp

@@ -1,183 +0,0 @@
-//
-// chat_client.cpp
-// ~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-#include <cstdlib>
-#include <deque>
-#include <iostream>
-#include <thread>
-#include "asio.hpp"
-#include "chat_message.hpp"
-#include "protocol_examples_common.h"
-#include "esp_event.h"
-#include "nvs_flash.h"
-
-using asio::ip::tcp;
-
-typedef std::deque<chat_message> chat_message_queue;
-
-class chat_client
-{
-public:
-  chat_client(asio::io_context& io_context,
-      const tcp::resolver::results_type& endpoints)
-    : io_context_(io_context),
-      socket_(io_context)
-  {
-    do_connect(endpoints);
-  }
-
-  void write(const chat_message& msg)
-  {
-    asio::post(io_context_,
-        [this, msg]()
-        {
-          bool write_in_progress = !write_msgs_.empty();
-          write_msgs_.push_back(msg);
-          if (!write_in_progress)
-          {
-            do_write();
-          }
-        });
-  }
-
-  void close()
-  {
-    asio::post(io_context_, [this]() { socket_.close(); });
-  }
-
-private:
-  void do_connect(const tcp::resolver::results_type& endpoints)
-  {
-    asio::async_connect(socket_, endpoints,
-        [this](std::error_code ec, tcp::endpoint)
-        {
-          if (!ec)
-          {
-            do_read_header();
-          }
-        });
-  }
-
-  void do_read_header()
-  {
-    asio::async_read(socket_,
-        asio::buffer(read_msg_.data(), chat_message::header_length),
-        [this](std::error_code ec, std::size_t /*length*/)
-        {
-          if (!ec && read_msg_.decode_header())
-          {
-            do_read_body();
-          }
-          else
-          {
-            socket_.close();
-          }
-        });
-  }
-
-  void do_read_body()
-  {
-    asio::async_read(socket_,
-        asio::buffer(read_msg_.body(), read_msg_.body_length()),
-        [this](std::error_code ec, std::size_t /*length*/)
-        {
-          if (!ec)
-          {
-            std::cout.write(read_msg_.body(), read_msg_.body_length());
-            std::cout << "\n";
-            do_read_header();
-          }
-          else
-          {
-            socket_.close();
-          }
-        });
-  }
-
-  void do_write()
-  {
-    asio::async_write(socket_,
-        asio::buffer(write_msgs_.front().data(),
-          write_msgs_.front().length()),
-        [this](std::error_code ec, std::size_t /*length*/)
-        {
-          if (!ec)
-          {
-            write_msgs_.pop_front();
-            if (!write_msgs_.empty())
-            {
-              do_write();
-            }
-          }
-          else
-          {
-            socket_.close();
-          }
-        });
-  }
-
-private:
-  asio::io_context& io_context_;
-  tcp::socket socket_;
-  chat_message read_msg_;
-  chat_message_queue write_msgs_;
-};
-
-void read_line(char * line, int max_chars);
-
-
-extern "C" void app_main(void)
-{
-    ESP_ERROR_CHECK(nvs_flash_init());
-    esp_netif_init();
-    ESP_ERROR_CHECK(esp_event_loop_create_default());
-
-    /* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
-     * Read "Establishing Wi-Fi or Ethernet Connection" section in
-     * examples/protocols/README.md for more information about this function.
-     */
-    ESP_ERROR_CHECK(example_connect());
-
-    /* This helper function configures blocking UART I/O */
-    ESP_ERROR_CHECK(example_configure_stdin_stdout());
-
-    std::string name(CONFIG_EXAMPLE_SERVER_IP);
-    std::string port(CONFIG_EXAMPLE_PORT);
-    char line[chat_message::max_body_length + 1] = { 0 };
-
-    if (name == "FROM_STDIN") {
-      std::cout << "Please enter ip address of chat server" << std::endl;
-      if (std::cin.getline(line, chat_message::max_body_length + 1)) {
-        name = line;
-        std::cout << "Chat server IP:" << name << std::endl;
-      }
-    }
-
-    asio::io_context io_context;
-    tcp::resolver resolver(io_context);
-    auto endpoints = resolver.resolve(name, port);
-
-    chat_client c(io_context, endpoints);
-
-    std::thread t([&io_context](){ io_context.run(); });
-
-    while (std::cin.getline(line, chat_message::max_body_length + 1) && std::string(line) != "exit") {
-      chat_message msg;
-      msg.body_length(std::strlen(line));
-      std::memcpy(msg.body(), line, msg.body_length());
-      msg.encode_header();
-      c.write(msg);
-    }
-
-    c.close();
-    t.join();
-
-    ESP_ERROR_CHECK(example_disconnect());
-}

examples/protocols/asio/chat_client/sdkconfig.defaults

@@ -1,7 +0,0 @@
-CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
-
-#
-# Partition Table
-#
-# Leave some room for larger apps without needing to reduce other features
-CONFIG_PARTITION_TABLE_SINGLE_APP_LARGE=y

examples/protocols/asio/chat_server/CMakeLists.txt

@@ -1,10 +0,0 @@
-# The following lines of boilerplate have to be in your project's CMakeLists
-# in this exact order for cmake to work correctly
-cmake_minimum_required(VERSION 3.5)
-
-# (Not part of the boilerplate)
-# This example uses an extra component for common functions such as Wi-Fi and Ethernet connection.
-set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/protocol_examples_common)
-
-include($ENV{IDF_PATH}/tools/cmake/project.cmake)
-project(asio_chat_server)

examples/protocols/asio/chat_server/README.md

@@ -1,23 +0,0 @@
-# Asio chat server example
-
-Simple Asio chat server using WiFi STA or Ethernet.
-
-## Example workflow
-
-- Wi-Fi or Ethernet connection is established, and IP address is obtained.
-- Asio chat server is started on port number defined through the project configuration.
-- Chat server echoes a message (received from any client) to all connected clients.
-
-## Running the example
-
-- Open project configuration menu (`idf.py menuconfig`) to configure Wi-Fi or Ethernet. See "Establishing Wi-Fi or Ethernet Connection" section in [examples/protocols/README.md](../../README.md) for more details.
-- Set server port number in menuconfig, "Example configuration".
-- Run `idf.py -p PORT flash monitor` to build and upload the example to your board and connect to it's serial terminal.
-- Wait for the board to connect to WiFi or Ethernet (note the IP address).
-- Connect to the server using multiple clients, for example using any option below.
-    - build and run asi chat client on your host machine
-    - run chat_client asio example on ESP platform
-    - since chat message consist of ascii size and message, it is possible to 
-        netcat `nc IP PORT` and type for example `   4ABC<CR>` to transmit 'ABC\n'
-
-See the README.md file in the upper level 'examples' directory for more information about examples.

examples/protocols/asio/chat_server/asio_chat_server_test.py

@@ -1,44 +0,0 @@
-import os
-import re
-import socket
-
-import ttfw_idf
-
-
-@ttfw_idf.idf_example_test(env_tag='Example_WIFI_Protocols')
-def test_examples_protocol_asio_chat_server(env, extra_data):
-    """
-    steps: |
-      1. join AP
-      2. Start server
-      3. Test connects to server and sends a test message
-      4. Test evaluates received test message from server
-    """
-    test_msg = b'   4ABC\n'
-    dut1 = env.get_dut('chat_server', 'examples/protocols/asio/chat_server', dut_class=ttfw_idf.ESP32DUT)
-    # check and log bin size
-    binary_file = os.path.join(dut1.app.binary_path, 'asio_chat_server.bin')
-    bin_size = os.path.getsize(binary_file)
-    ttfw_idf.log_performance('asio_chat_server_bin_size', '{}KB'.format(bin_size // 1024))
-    # 1. start test
-    dut1.start_app()
-    # 2. get the server IP address
-    data = dut1.expect(re.compile(r' IPv4 address: ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)'), timeout=30)
-    # 3. create tcp client and connect to server
-    dut1.expect('ASIO engine is up and running', timeout=1)
-    cli = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    cli.settimeout(30)
-    cli.connect((data[0], 2222))
-    cli.send(test_msg)
-    data = cli.recv(1024)
-    # 4. check the message received back from the server
-    if (data == test_msg):
-        print('PASS: Received correct message {}'.format(data))
-        pass
-    else:
-        print('Failure!')
-        raise ValueError('Wrong data received from asi tcp server: {} (expoected:{})'.format(data, test_msg))
-
-
-if __name__ == '__main__':
-    test_examples_protocol_asio_chat_server()

examples/protocols/asio/chat_server/main/CMakeLists.txt

@@ -1,2 +0,0 @@
-idf_component_register(SRCS "chat_server.cpp"
-                    INCLUDE_DIRS ".")

examples/protocols/asio/chat_server/main/Kconfig.projbuild

@@ -1,9 +0,0 @@
-menu "Example Configuration"
-
-    config EXAMPLE_PORT
-        string "Asio example server port number"
-        default "2222"
-        help
-            Port number used by Asio example
-
-endmenu

examples/protocols/asio/chat_server/main/chat_message.hpp

@@ -1,91 +0,0 @@
-//
-// chat_message.hpp
-// ~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-#ifndef CHAT_MESSAGE_HPP
-#define CHAT_MESSAGE_HPP
-
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-
-class chat_message
-{
-public:
-  enum { header_length = 4 };
-  enum { max_body_length = 512 };
-
-  chat_message()
-    : body_length_(0)
-  {
-  }
-
-  const char* data() const
-  {
-    return data_;
-  }
-
-  char* data()
-  {
-    return data_;
-  }
-
-  std::size_t length() const
-  {
-    return header_length + body_length_;
-  }
-
-  const char* body() const
-  {
-    return data_ + header_length;
-  }
-
-  char* body()
-  {
-    return data_ + header_length;
-  }
-
-  std::size_t body_length() const
-  {
-    return body_length_;
-  }
-
-  void body_length(std::size_t new_length)
-  {
-    body_length_ = new_length;
-    if (body_length_ > max_body_length)
-      body_length_ = max_body_length;
-  }
-
-  bool decode_header()
-  {
-    char header[header_length + 1] = "";
-    std::strncat(header, data_, header_length);
-    body_length_ = std::atoi(header);
-    if (body_length_ > max_body_length)
-    {
-      body_length_ = 0;
-      return false;
-    }
-    return true;
-  }
-
-  void encode_header()
-  {
-    char header[header_length + 1] = "";
-    std::sprintf(header, "%4d", static_cast<int>(body_length_));
-    std::memcpy(data_, header, header_length);
-  }
-
-private:
-  char data_[header_length + max_body_length];
-  std::size_t body_length_;
-};
-
-#endif // CHAT_MESSAGE_HPP

examples/protocols/asio/chat_server/main/component.mk

@@ -1,8 +0,0 @@
-#
-# Main component makefile.
-#
-# This Makefile can be left empty. By default, it will take the sources in the
-# src/ directory, compile them and link them into lib(subdirectory_name).a
-# in the build directory. This behaviour is entirely configurable,
-# please read the ESP-IDF documents if you need to do this.
-#

examples/protocols/asio/chat_server/sdkconfig.defaults

@@ -1,7 +0,0 @@
-CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
-
-#
-# Partition Table
-#
-# Leave some room for larger apps without needing to reduce other features
-CONFIG_PARTITION_TABLE_SINGLE_APP_LARGE=y