esp-idf/components/esp_netif/loopback/esp_netif_loopback.c

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/*
* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include "esp_netif_lwip_internal.h"
#include "esp_netif.h"
#include "esp_netif_private.h"
#if CONFIG_ESP_NETIF_LOOPBACK
#include "esp_log.h"
//
// Purpose of this module is to implement minimal loopback netif to facilitate
// low level driver testing
//
#define ESP_NETIF_HOSTNAME_MAX_SIZE 32
static const char *TAG = "esp_netif_loopback";
static bool s_netif_initialized = false;
static bool s_netif_started = false;
static bool s_netif_up = false;
/**
* @brief Main esp-netif container with interface related information
*
*
*/
struct esp_netif_obj {
// default interface addresses
uint8_t mac[NETIF_MAX_HWADDR_LEN];
esp_netif_ip_info_t* ip_info;
esp_netif_ip_info_t* ip_info_old;
// io driver related
void* driver_handle;
esp_err_t (*driver_transmit)(void *h, void *buffer, size_t len);
void (*driver_free_rx_buffer)(void *h, void* buffer);
// misc flags, types, keys, priority
esp_netif_flags_t flags;
char * hostname;
char * if_key;
char * if_desc;
int route_prio;
};
void esp_netif_set_ip4_addr(esp_ip4_addr_t *addr, uint8_t a, uint8_t b, uint8_t c, uint8_t d)
{
memset(addr, 0, sizeof(esp_ip4_addr_t));
addr->addr = esp_netif_htonl(esp_netif_ip4_makeu32(a,b,c,d));
}
char * esp_ip4addr_ntoa(const esp_ip4_addr_t *addr, char *buf, int buflen)
{
return NULL;
}
esp_netif_iodriver_handle esp_netif_get_io_driver(esp_netif_t *esp_netif)
{
return esp_netif->driver_handle;
}
esp_netif_t* esp_netif_get_handle_from_netif_impl(void *dev)
{
return NULL;
}
void* esp_netif_get_netif_impl(esp_netif_t *esp_netif)
{
return NULL;
}
esp_err_t esp_netif_init(void)
{
ESP_LOGI(TAG, "loopback initialization");
if (s_netif_initialized) {
ESP_LOGE(TAG, "esp-netif has already been initialized");
return ESP_ERR_INVALID_SIZE;
}
s_netif_initialized = true;
ESP_LOGD(TAG, "esp-netif has been successfully initialized");
return ESP_OK;
}
esp_err_t esp_netif_deinit(void)
{
ESP_LOGI(TAG, "loopback initialization");
if (!s_netif_initialized) {
ESP_LOGE(TAG, "esp-netif has not been initialized yet");
return ESP_ERR_INVALID_SIZE;
}
s_netif_initialized = false;
ESP_LOGD(TAG, "esp-netif has been successfully deinitialized");
return ESP_OK;
}
static esp_err_t esp_netif_init_configuration(esp_netif_t *esp_netif, const esp_netif_config_t *cfg)
{
// Basic esp_netif and lwip is a mandatory configuration and cannot be updated after esp_netif_new()
if (cfg == NULL || cfg->base == NULL || cfg->stack == NULL) {
return ESP_ERR_ESP_NETIF_INVALID_PARAMS;
}
// Configure general esp-netif properties
memcpy(esp_netif->mac, cfg->base->mac, NETIF_MAX_HWADDR_LEN);
if (cfg->base->ip_info == NULL) {
ip4_addr_set_zero(&esp_netif->ip_info->ip);
ip4_addr_set_zero(&esp_netif->ip_info->gw);
ip4_addr_set_zero(&esp_netif->ip_info->netmask);
} else {
memcpy(esp_netif->ip_info, cfg->base->ip_info, sizeof(esp_netif_ip_info_t));
}
memcpy(esp_netif->ip_info_old, esp_netif->ip_info, sizeof(esp_netif_ip_info_t));
// Setup main config parameters
esp_netif->flags = cfg->base->flags;
if (cfg->base->if_key) {
esp_netif->if_key = strdup(cfg->base->if_key);
}
if (cfg->base->if_desc) {
esp_netif->if_desc = strdup(cfg->base->if_desc);
}
if (cfg->base->route_prio) {
esp_netif->route_prio = cfg->base->route_prio;
}
// Network stack is bypassed in loopback interface
// Install IO functions only if provided -- connects driver and netif
// this configuration could be updated after esp_netif_new(), typically in post_attach callback
if (cfg->driver) {
const esp_netif_driver_ifconfig_t *esp_netif_driver_config = cfg->driver;
if (esp_netif_driver_config->handle) {
esp_netif->driver_handle = esp_netif_driver_config->handle;
}
if (esp_netif_driver_config->transmit) {
esp_netif->driver_transmit = esp_netif_driver_config->transmit;
}
if (esp_netif_driver_config->driver_free_rx_buffer) {
esp_netif->driver_free_rx_buffer = esp_netif_driver_config->driver_free_rx_buffer;
}
}
return ESP_OK;
}
esp_netif_t *esp_netif_new(const esp_netif_config_t *esp_netif_config)
{
// mandatory configuration must be provided when creating esp_netif object
if (esp_netif_config == NULL) {
return NULL;
}
// Create parent esp-netif object
esp_netif_t *esp_netif = calloc(1, sizeof(struct esp_netif_obj));
if (!esp_netif) {
return NULL;
}
// Create ip info
esp_netif_ip_info_t *ip_info = calloc(1, sizeof(esp_netif_ip_info_t));
if (!ip_info) {
free(esp_netif);
return NULL;
}
esp_netif->ip_info = ip_info;
// creating another ip info (to store old ip)
ip_info = calloc(1, sizeof(esp_netif_ip_info_t));
if (!ip_info) {
free(esp_netif->ip_info);
free(esp_netif);
return NULL;
}
esp_netif->ip_info_old = ip_info;
esp_netif_add_to_list(esp_netif);
// Configure the created object with provided configuration
esp_err_t ret = esp_netif_init_configuration(esp_netif, esp_netif_config);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Initial configuration of esp_netif failed with %d", ret);
esp_netif_destroy(esp_netif);
return NULL;
}
return esp_netif;
}
void esp_netif_destroy(esp_netif_t *esp_netif)
{
if (esp_netif) {
esp_netif_remove_from_list(esp_netif);
free(esp_netif->ip_info);
free(esp_netif->ip_info_old);
free(esp_netif->if_key);
free(esp_netif->if_desc);
free(esp_netif);
}
}
esp_err_t esp_netif_attach(esp_netif_t *esp_netif, esp_netif_iodriver_handle driver_handle)
{
esp_netif_driver_base_t *base_driver = driver_handle;
esp_netif->driver_handle = driver_handle;
if (base_driver->post_attach) {
esp_err_t ret = base_driver->post_attach(esp_netif, driver_handle);
if (ret != ESP_OK) {
ESP_LOGE(TAG, "Post-attach callback of driver(%p) failed with %d", driver_handle, ret);
return ESP_ERR_ESP_NETIF_DRIVER_ATTACH_FAILED;
}
}
return ESP_OK;
}
esp_err_t esp_netif_set_driver_config(esp_netif_t *esp_netif,
const esp_netif_driver_ifconfig_t *driver_config)
{
if (esp_netif == NULL || driver_config == NULL) {
return ESP_ERR_ESP_NETIF_INVALID_PARAMS;
}
esp_netif->driver_handle = driver_config->handle;
esp_netif->driver_transmit = driver_config->transmit;
esp_netif->driver_free_rx_buffer = driver_config->driver_free_rx_buffer;
return ESP_OK;
}
esp_err_t esp_netif_set_mac(esp_netif_t *esp_netif, uint8_t mac[])
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_start(esp_netif_t *esp_netif)
{
ESP_LOGI(TAG, "Netif started");
s_netif_started = true;
return ESP_OK;
}
esp_err_t esp_netif_stop(esp_netif_t *esp_netif)
{
ESP_LOGI(TAG, "Netif stopped");
s_netif_started = false;
return ESP_OK;
}
//
// IO translate functions
//
void esp_netif_free_rx_buffer(void *h, void* buffer)
{
esp_netif_t *esp_netif = h;
esp_netif->driver_free_rx_buffer(esp_netif->driver_handle, buffer);
}
esp_err_t esp_netif_transmit(esp_netif_t *esp_netif, void* data, size_t len)
{
ESP_LOGV(TAG, "Transmitting data: ptr:%p, size:%d", data, len);
return (esp_netif->driver_transmit)(esp_netif->driver_handle, data, len);
}
esp_err_t esp_netif_receive(esp_netif_t *esp_netif, void *buffer, size_t len, void *eb)
{
ESP_LOGV(TAG, "Received data: ptr:%p, size:%d", buffer, len);
esp_netif_transmit(esp_netif, buffer, len);
if (eb) {
esp_netif_free_rx_buffer(esp_netif, eb);
}
return ESP_OK;
}
esp_err_t esp_netif_dhcpc_stop(esp_netif_t *esp_netif)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_dhcpc_start(esp_netif_t *esp_netif)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_dhcps_get_status(esp_netif_t *esp_netif, esp_netif_dhcp_status_t *status)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_dhcpc_get_status(esp_netif_t *esp_netif, esp_netif_dhcp_status_t *status)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_dhcps_start(esp_netif_t *esp_netif)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_dhcps_stop(esp_netif_t *esp_netif)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_set_hostname(esp_netif_t *esp_netif, const char *hostname)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_get_hostname(esp_netif_t *esp_netif, const char **hostname)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_up(esp_netif_t *esp_netif)
{
ESP_LOGI(TAG, "Netif going up");
s_netif_up = true;
return ESP_OK;
}
esp_err_t esp_netif_down(esp_netif_t *esp_netif)
{
ESP_LOGI(TAG, "Netif going down");
s_netif_up = false;
return ESP_OK;
}
bool esp_netif_is_netif_up(esp_netif_t *esp_netif)
{
return s_netif_up;
}
esp_err_t esp_netif_get_old_ip_info(esp_netif_t *esp_netif, esp_netif_ip_info_t *ip_info)
{
ESP_LOGD(TAG, "%s esp_netif:%p", __func__, esp_netif);
if (esp_netif == NULL || ip_info == NULL) {
return ESP_ERR_INVALID_ARG;
}
memcpy(ip_info, esp_netif->ip_info_old, sizeof(esp_netif_ip_info_t));
return ESP_OK;
}
esp_err_t esp_netif_get_ip_info(esp_netif_t *esp_netif, esp_netif_ip_info_t *ip_info)
{
ESP_LOGD(TAG, "%s esp_netif:%p", __func__, esp_netif);
if (esp_netif == NULL || ip_info == NULL) {
return ESP_ERR_INVALID_ARG;
}
memcpy(ip_info, esp_netif->ip_info, sizeof(esp_netif_ip_info_t));
return ESP_OK;
}
bool esp_netif_is_valid_static_ip(esp_netif_ip_info_t *ip_info)
{
return true;
}
esp_err_t esp_netif_set_old_ip_info(esp_netif_t *esp_netif, const esp_netif_ip_info_t *ip_info)
{
ESP_LOGD(TAG, "%s esp_netif:%p", __func__, esp_netif);
if (esp_netif == NULL || ip_info == NULL) {
return ESP_ERR_INVALID_ARG;
}
memcpy(esp_netif->ip_info_old, ip_info, sizeof(esp_netif_ip_info_t));
return ESP_OK;
}
esp_err_t esp_netif_set_dns_info(esp_netif_t *esp_netif, esp_netif_dns_type_t type, esp_netif_dns_info_t *dns)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_get_dns_info(esp_netif_t *esp_netif, esp_netif_dns_type_t type, esp_netif_dns_info_t *dns)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_create_ip6_linklocal(esp_netif_t *esp_netif)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_get_ip6_linklocal(esp_netif_t *esp_netif, esp_ip6_addr_t *if_ip6)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_get_ip6_global(esp_netif_t *esp_netif, esp_ip6_addr_t *if_ip6)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_netif_flags_t esp_netif_get_flags(esp_netif_t *esp_netif)
{
return esp_netif->flags;
}
const char *esp_netif_get_ifkey(esp_netif_t *esp_netif)
{
return esp_netif->if_key;
}
const char *esp_netif_get_desc(esp_netif_t *esp_netif)
{
return esp_netif->if_desc;
}
int32_t esp_netif_get_event_id(esp_netif_t *esp_netif, esp_netif_ip_event_type_t event_type)
{
return 0;
}
esp_err_t esp_netif_dhcps_option(esp_netif_t *esp_netif, esp_netif_dhcp_option_mode_t opt_op, esp_netif_dhcp_option_id_t opt_id, void *opt_val,
uint32_t opt_len)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_dhcpc_option(esp_netif_t *esp_netif, esp_netif_dhcp_option_mode_t opt_op, esp_netif_dhcp_option_id_t opt_id, void *opt_val,
uint32_t opt_len)
{
return ESP_ERR_NOT_SUPPORTED;
}
int esp_netif_get_netif_impl_index(esp_netif_t *esp_netif)
{
return 0;
}
esp_err_t esp_netif_join_ip6_multicast_group(esp_netif_t *esp_netif, const esp_ip6_addr_t *addr)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_leave_ip6_multicast_group(esp_netif_t *esp_netif, const esp_ip6_addr_t *addr)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_add_ip6_address(esp_netif_t *esp_netif, const esp_ip6_addr_t *addr, uint8_t preference)
{
return ESP_ERR_NOT_SUPPORTED;
}
esp_err_t esp_netif_remove_ip6_address(esp_netif_t *esp_netif, const esp_ip6_addr_t *addr)
{
return ESP_ERR_NOT_SUPPORTED;
}
#endif /* CONFIG_ESP_NETIF_LOOPBACK */