Added component: Console for runtime network interface configuration …

…and monitoring.

components/console_cmd_ifconfig/CMakeLists.txt

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+idf_component_register(SRCS "console_connect.c" "console_ifconfig.c"
+                    INCLUDE_DIRS "include"
+                    REQUIRES "ethernet_init"
+                    PRIV_REQUIRES esp_netif console nvs_flash esp_eth)
+

components/console_cmd_ifconfig/Kconfig.projbuild

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+menu "Enable console commands"
+
+    orsource "$IDF_PATH/examples/common_components/env_caps/$IDF_TARGET/Kconfig.env_caps"
+
+    config EXAMPLE_CMD_QUIT
+        bool
+        prompt "quit"
+        default y
+    config EXAMPLE_CMD_IFCONFIG
+        bool
+        prompt "ifconfig"
+        default y
+    config EXAMPLE_CMD_PING
+        bool
+        prompt "ping"
+        default n
+
+endmenu

components/console_cmd_ifconfig/LICENSE

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+console_cmd_ifconfig/LICENSE

components/console_cmd_ifconfig/README.md

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+# Console command ifconfig
+The component offers a console that enables runtime network interface configuration and monitoring for any example project.
+
+## API
+
+### Steps to enable console in an example code:
+1. Add this component to your project using the command:
+    ```bash
+    idf.py add-dependency
+    ```
+2. In the main file of the example, add the following line:
+    ```c
+    #include "console_connect.h"
+    ```
+3. Ensure esp-netif is initialized and default event loop is created in your app_main():
+    ```c
+    ESP_ERROR_CHECK(esp_netif_init());
+    ESP_ERROR_CHECK(esp_event_loop_create_default());
+    ```
+4. In your app_main() function, add the following line as the last line:
+    ```c
+    example_start_networking_console(NULL, NULL);
+    ```
+5. Optionally, you can add a user-defined command:
+    ```c
+    example_start_networking_console("user_cmd", usr_cmd_hndl);
+    ```
+    In the above line, "user_cmd" is a string representing the user-defined command name, and usr_cmd_hndl is the command callback function with the prototype.
+    ```c
+    int usr_cmd_hndl(int argc, char **argv)
+    ```
+
+
+## Suported commands:
+
+### Ifconfig:
+* **ifconfig help:** Prints the help text for all ifconfig commands
+* **ifconfig netif create/destroy \<ethernet handle id\>/\<iface\>:** Create or destroy a network interface with the specified ethernet handle or interface name
+* **ifconfig eth show:** Display a list of available ethernet handle
+* **ifconfig:** Display a list of all esp_netif interfaces along with their information.
+* **ifconfig \<iface>:** Provide the details of the named interface.
+* **ifconfig \<iface> default:** Set the specified interface as the default interface.
+* **ifconfig \<iface> ip6:** Enable IPv6 on the specified interface.
+* **ifconfig <iface> up:** Enable the specified interface.
+* **ifconfig <iface> down:** Disable the specified interface.
+* **ifconfig \<iface> link \<up/down>:** Enable or disable the link of the specified interface.
+* **ifconfig \<iface> ip \<ipv4 address>:** Set the IPv4 address of the specified interface.
+* **ifconfig \<iface> mask \<ipv4 address>:** Set the subnet mask of the specified interface.
+* **ifconfig \<iface> gw \<ipv4 address>:** Set the default gateway of the specified interface.
+* **ifconfig \<iface> napt \<enable/disable>:** Enable or disable Network Address and Port Translation (NAPT) on the specified interface.
+* **ifconfig \<iface> dhcp server \<enable/disable>:** Enable or disable the DHCP server on the specified interface. (Note: DHCP server is not supported yet)
+* **ifconfig \<iface> dhcp client \<enable/disable>:** Enable or disable the DHCP client on the specified interface.
+
+Note: Disabling the DHCP server and client enables the use of static IP configuration.
+
+### Quit:
+**quit:** Quits the Console application.
+

components/console_cmd_ifconfig/console_connect.c

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+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Unlicense OR CC0-1.0
+ */
+#include <stdio.h>
+#include <string.h>
+#include "sdkconfig.h"
+#include "lwip/inet.h"
+#include "lwip/netdb.h"
+#include "lwip/sockets.h"
+#include "esp_netif.h"
+#include "esp_console.h"
+#include "esp_event.h"
+#include "nvs_flash.h"
+#include "argtable3/argtable3.h"
+#include "esp_log.h"
+#include "esp_netif_net_stack.h"
+#include "lwip/ip6.h"
+#include "lwip/opt.h"
+#if IP_NAPT
+#include "lwip/lwip_napt.h"
+#endif
+#include "console_connect.h"
+#include "console_ifconfig.h"
+
+static const char *TAG = "console_connect";
+
+static esp_console_repl_t *s_repl = NULL;
+
+/* handle 'quit' command */
+static int do_cmd_quit(int argc, char **argv)
+{
+    printf("Bye Bye\n\r\n");
+    s_repl->del(s_repl);
+    return 0;
+}
+
+static esp_console_cmd_t register_quit(void)
+{
+    esp_console_cmd_t command = {
+        .command = "quit",
+        .help = "Quit REPL environment",
+        .func = &do_cmd_quit
+    };
+    return command;
+}
+
+
+esp_err_t example_start_networking_console(char *usr_cmd, int (*usr_cmd_hndl)(int argc, char **argv))
+{
+    esp_console_repl_config_t repl_config = ESP_CONSOLE_REPL_CONFIG_DEFAULT();
+    esp_console_cmd_t command;
+
+    // Initialize TCP/IP network interface aka the esp-netif (should be called only once in application)
+    //ESP_ERROR_CHECK(esp_netif_init());
+    // Create default event loop that running in background
+    //ESP_ERROR_CHECK(esp_event_loop_create_default());
+
+    // install console REPL environment
+#if CONFIG_ESP_CONSOLE_UART
+    esp_console_dev_uart_config_t uart_config = ESP_CONSOLE_DEV_UART_CONFIG_DEFAULT();
+    ESP_ERROR_CHECK(esp_console_new_repl_uart(&uart_config, &repl_config, &s_repl));
+#endif
+
+#if CONFIG_EXAMPLE_CMD_IFCONFIG
+    /* register command `ifconfig` */
+    command = register_ifconfig();
+    if (esp_console_cmd_register(&command)) {
+        ESP_LOGE(TAG, "Unable to register ifconfig");
+    }
+#endif
+
+#if CONFIG_EXAMPLE_CMD_QUIT
+    /* register command `quit` */
+    command = register_quit();
+    if (esp_console_cmd_register(&command)) {
+        ESP_LOGE(TAG, "Unable to register quit");
+    }
+#endif
+
+    /* Register command from caller */
+    if ((usr_cmd_hndl != NULL) && (usr_cmd != NULL)) {
+        esp_console_cmd_t command = {
+            .command = usr_cmd,
+            .help = "user command",
+            .func = usr_cmd_hndl
+        };
+        if (esp_console_cmd_register(&command) != ESP_OK) {
+            ESP_LOGE(TAG, "Unable to register user command");
+        }
+    }
+
+    // start console REPL
+    return esp_console_start_repl(s_repl);
+}