// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _TCPIP_ADAPTER_H_
#define _TCPIP_ADAPTER_H_
/**
* @brief TCPIP adapter library
*
* The aim of this adapter is to provide an abstract layer upon TCPIP stack.
* With this layer, switch to other TCPIP stack is possible and easy in esp-idf.
*
* If users want to use other TCPIP stack, all those functions should be implemented
* by using the specific APIs of that stack. The macros in CONFIG_TCPIP_LWIP should be
* re-defined.
*
* tcpip_adapter_init should be called in the start of app_main for only once.
*
* Currently most adapter APIs are called in event_default_handlers.c.
*
* We recommend users only use set/get IP APIs, DHCP server/client APIs,
* get free station list APIs in application side. Other APIs are used in esp-idf internal,
* otherwise the state maybe wrong.
*
* TODO: ipv6 support will be added, use menuconfig to disable CONFIG_TCPIP_LWIP
*/
#include <stdint.h>
#include "rom/queue.h"
#include "esp_wifi_types.h"
#define CONFIG_TCPIP_LWIP 1
#define CONFIG_DHCP_STA_LIST 1
#if CONFIG_TCPIP_LWIP
#include "lwip/ip_addr.h"
#include "apps/dhcpserver.h"
#ifdef __cplusplus
extern "C" {
#endif
#define IP2STR(ipaddr) ip4_addr1_16(ipaddr), \
ip4_addr2_16(ipaddr), \
ip4_addr3_16(ipaddr), \
ip4_addr4_16(ipaddr)
#define IPSTR "%d.%d.%d.%d"
#define IPV62STR(ipaddr) IP6_ADDR_BLOCK1(&(ipaddr)), \
IP6_ADDR_BLOCK2(&(ipaddr)), \
IP6_ADDR_BLOCK3(&(ipaddr)), \
IP6_ADDR_BLOCK4(&(ipaddr)), \
IP6_ADDR_BLOCK5(&(ipaddr)), \
IP6_ADDR_BLOCK6(&(ipaddr)), \
IP6_ADDR_BLOCK7(&(ipaddr)), \
IP6_ADDR_BLOCK8(&(ipaddr))
#define IPV6STR "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x"
typedef struct {
ip4_addr_t ip;
ip4_addr_t netmask;
ip4_addr_t gw;
} tcpip_adapter_ip_info_t;
typedef struct {
ip6_addr_t ip;
} tcpip_adapter_ip6_info_t;
typedef dhcps_lease_t tcpip_adapter_dhcps_lease_t;
#if CONFIG_DHCP_STA_LIST
typedef struct {
uint8_t mac[6];
ip4_addr_t ip;
} tcpip_adapter_sta_info_t;
typedef struct {
tcpip_adapter_sta_info_t sta[ESP_WIFI_MAX_CONN_NUM];
int num;
} tcpip_adapter_sta_list_t;
#endif
#endif
#define ESP_ERR_TCPIP_ADAPTER_BASE 0x5000 // TODO: move base address to esp_err.h
#define ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS ESP_ERR_TCPIP_ADAPTER_BASE + 0x01
#define ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY ESP_ERR_TCPIP_ADAPTER_BASE + 0x02
#define ESP_ERR_TCPIP_ADAPTER_DHCPC_START_FAILED ESP_ERR_TCPIP_ADAPTER_BASE + 0x03
#define ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STARTED ESP_ERR_TCPIP_ADAPTER_BASE + 0x04
#define ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STOPPED ESP_ERR_TCPIP_ADAPTER_BASE + 0x05
#define ESP_ERR_TCPIP_ADAPTER_NO_MEM ESP_ERR_TCPIP_ADAPTER_BASE + 0x06
#define ESP_ERR_TCPIP_ADAPTER_DHCP_NOT_STOPPED ESP_ERR_TCPIP_ADAPTER_BASE + 0x07
/* TODO: add Ethernet interface */
typedef enum {
TCPIP_ADAPTER_IF_STA = 0, /**< ESP32 station interface */
TCPIP_ADAPTER_IF_AP, /**< ESP32 soft-AP interface */
TCPIP_ADAPTER_IF_ETH, /**< ESP32 ethernet interface */
TCPIP_ADAPTER_IF_MAX
} tcpip_adapter_if_t;
/*type of DNS server*/
typedef enum {
TCPIP_ADAPTER_DNS_MAIN= 0, /**DNS main server address*/
TCPIP_ADAPTER_DNS_BACKUP, /**DNS backup server address,for STA only,support soft-AP in future*/
TCPIP_ADAPTER_DNS_FALLBACK, /**DNS fallback server address,for STA only*/
TCPIP_ADAPTER_DNS_MAX /**Max DNS */
} tcpip_adapter_dns_type_t;
/*info of DNS server*/
typedef struct {
ip_addr_t ip;
} tcpip_adapter_dns_info_t;
/* status of DHCP client or DHCP server */
typedef enum {
TCPIP_ADAPTER_DHCP_INIT = 0, /**< DHCP client/server in initial state */
TCPIP_ADAPTER_DHCP_STARTED, /**< DHCP client/server already been started */
TCPIP_ADAPTER_DHCP_STOPPED, /**< DHCP client/server already been stopped */
TCPIP_ADAPTER_DHCP_STATUS_MAX
} tcpip_adapter_dhcp_status_t;
/* set the option mode for DHCP client or DHCP server */
typedef enum{
TCPIP_ADAPTER_OP_START = 0,
TCPIP_ADAPTER_OP_SET, /**< set option mode */
TCPIP_ADAPTER_OP_GET, /**< get option mode */
TCPIP_ADAPTER_OP_MAX
} tcpip_adapter_option_mode_t;
typedef enum{
TCPIP_ADAPTER_DOMAIN_NAME_SERVER = 6, /**< domain name server */
TCPIP_ADAPTER_ROUTER_SOLICITATION_ADDRESS = 32, /**< solicitation router address */
TCPIP_ADAPTER_REQUESTED_IP_ADDRESS = 50, /**< request IP address pool */
TCPIP_ADAPTER_IP_ADDRESS_LEASE_TIME = 51, /**< request IP address lease time */
TCPIP_ADAPTER_IP_REQUEST_RETRY_TIME = 52, /**< request IP address retry counter */
} tcpip_adapter_option_id_t;
struct tcpip_adapter_api_msg_s;
typedef int (*tcpip_adapter_api_fn)(struct tcpip_adapter_api_msg_s *msg);
typedef struct tcpip_adapter_api_msg_s {
int type; /**< The first field MUST be int */
int ret;
tcpip_adapter_api_fn api_fn;
tcpip_adapter_if_t tcpip_if;
tcpip_adapter_ip_info_t *ip_info;
uint8_t *mac;
void *data;
} tcpip_adapter_api_msg_t;
typedef struct tcpip_adapter_dns_param_s {
tcpip_adapter_dns_type_t dns_type;
tcpip_adapter_dns_info_t *dns_info;
} tcpip_adapter_dns_param_t;
#define TCPIP_ADAPTER_TRHEAD_SAFE 1
#define TCPIP_ADAPTER_IPC_LOCAL 0
#define TCPIP_ADAPTER_IPC_REMOTE 1
#define TCPIP_ADAPTER_IPC_CALL(_if, _mac, _ip, _data, _fn) do {\
tcpip_adapter_api_msg_t msg;\
if (tcpip_inited == false) {\
ESP_LOGE(TAG, "tcpip_adapter is not initialized!");\
abort();\
}\
memset(&msg, 0, sizeof(msg));\
msg.tcpip_if = (_if);\
msg.mac = (uint8_t*)(_mac);\
msg.ip_info = (tcpip_adapter_ip_info_t*)(_ip);\
msg.data = (void*)(_data);\
msg.api_fn = (_fn);\
if (TCPIP_ADAPTER_IPC_REMOTE == tcpip_adapter_ipc_check(&msg)) {\
ESP_LOGV(TAG, "check: remote, if=%d fn=%p\n", (_if), (_fn));\
return msg.ret;\
} else {\
ESP_LOGV(TAG, "check: local, if=%d fn=%p\n", (_if), (_fn));\
}\
}while(0)
typedef struct tcpip_adatper_ip_lost_timer_s {
bool timer_running;
} tcpip_adapter_ip_lost_timer_t;
/**
* @brief Initialize tcpip adapter
*
* This will initialize TCPIP stack inside.
*/
void tcpip_adapter_init(void);
/**
* @brief Start the ethernet interface with specific MAC and IP
*
* @param[in] mac: set MAC address of this interface
* @param[in] ip_info: set IP address of this interface
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_NO_MEM
*/
esp_err_t tcpip_adapter_eth_start(uint8_t *mac, tcpip_adapter_ip_info_t *ip_info);
/**
* @brief Start the Wi-Fi station interface with specific MAC and IP
*
* Station interface will be initialized, connect WiFi stack with TCPIP stack.
*
* @param[in] mac: set MAC address of this interface
* @param[in] ip_info: set IP address of this interface
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_NO_MEM
*/
esp_err_t tcpip_adapter_sta_start(uint8_t *mac, tcpip_adapter_ip_info_t *ip_info);
/**
* @brief Start the Wi-Fi AP interface with specific MAC and IP
*
* softAP interface will be initialized, connect WiFi stack with TCPIP stack.
*
* DHCP server will be started automatically.
*
* @param[in] mac: set MAC address of this interface
* @param[in] ip_info: set IP address of this interface
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_NO_MEM
*/
esp_err_t tcpip_adapter_ap_start(uint8_t *mac, tcpip_adapter_ip_info_t *ip_info);
/**
* @brief Stop an interface
*
* The interface will be cleanup in this API, if DHCP server/client are started, will be stopped.
*
* @param[in] tcpip_if: the interface which will be started
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY
*/
esp_err_t tcpip_adapter_stop(tcpip_adapter_if_t tcpip_if);
/**
* @brief Bring up an interface
*
* Only station interface need to be brought up, since station interface will be shut down when disconnect.
*
* @param[in] tcpip_if: the interface which will be up
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY
*/
esp_err_t tcpip_adapter_up(tcpip_adapter_if_t tcpip_if);
/**
* @brief Shut down an interface
*
* Only station interface need to be shut down, since station interface will be brought up when connect.
*
* @param[in] tcpip_if: the interface which will be down
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY
*/
esp_err_t tcpip_adapter_down(tcpip_adapter_if_t tcpip_if);
/**
* @brief Get interface's IP information
*
* There has an IP information copy in adapter library, if interface is up, get IP information from
* interface, otherwise get from copy.
*
* @param[in] tcpip_if: the interface which we want to get IP information
* @param[out] ip_info: If successful, IP information will be returned in this argument.
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
*/
esp_err_t tcpip_adapter_get_ip_info(tcpip_adapter_if_t tcpip_if, tcpip_adapter_ip_info_t *ip_info);
/**
* @brief Set interface's IP information
*
* There has an IP information copy in adapter library, if interface is up, also set interface's IP.
* DHCP client/server should be stopped before set new IP information.
*
* This function is mainly used for setting static IP.
*
* @param[in] tcpip_if: the interface which we want to set IP information
* @param[in] ip_info: store the IP information which needs to be set to specified interface
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
*/
esp_err_t tcpip_adapter_set_ip_info(tcpip_adapter_if_t tcpip_if, tcpip_adapter_ip_info_t *ip_info);
/**
* @brief Set DNS Server's information
*
* There has an DNS Server information copy in adapter library, set DNS Server for appointed interface and type.
*
* 1.In station mode, if dhcp client is enabled, then only the fallback DNS server can be set(TCPIP_ADAPTER_DNS_FALLBACK).
* Fallback DNS server is only used if no DNS servers are set via DHCP.
* If dhcp client is disabled, then need to set main/backup dns server(TCPIP_ADAPTER_DNS_MAIN, TCPIP_ADAPTER_DNS_BACKUP).
*
* 2.In soft-AP mode, the DNS Server's main dns server offered to the station is the IP address of soft-AP,
* if the application don't want to use the IP address of soft-AP, they can set the main dns server.
*
* This function is mainly used for setting static or Fallback DNS Server.
*
* @param[in] tcpip_if: the interface which we want to set DNS Server information
* @param[in] type: the type of DNS Server,including TCPIP_ADAPTER_DNS_MAIN, TCPIP_ADAPTER_DNS_BACKUP, TCPIP_ADAPTER_DNS_FALLBACK
* @param[in] dns: the DNS Server address to be set
*
* @return
* - ESP_OK on success
* - ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS invalid params
*/
esp_err_t tcpip_adapter_set_dns_info(tcpip_adapter_if_t tcpip_if, tcpip_adapter_dns_type_t type, tcpip_adapter_dns_info_t *dns);
/**
* @brief Get DNS Server's information
*
* When set the DNS Server information successfully, can get the DNS Server's information via the appointed tcpip_if and type
*
* This function is mainly used for getting DNS Server information.
*
* @param[in] tcpip_if: the interface which we want to get DNS Server information
* @param[in] type: the type of DNS Server,including TCPIP_ADAPTER_DNS_MAIN, TCPIP_ADAPTER_DNS_BACKUP, TCPIP_ADAPTER_DNS_FALLBACK
* @param[in] dns: the DNS Server address to be get
*
* @return
* - ESP_OK on success
* - ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS invalid params
*/
esp_err_t tcpip_adapter_get_dns_info(tcpip_adapter_if_t tcpip_if, tcpip_adapter_dns_type_t type, tcpip_adapter_dns_info_t *dns);
/**
* @brief Get interface's old IP information
*
* When the interface successfully gets a valid IP from DHCP server or static configured, a copy of
* the IP information is set to the old IP information. When IP lost timer expires, the old IP
* information is reset to 0.
*
* @param[in] tcpip_if: the interface which we want to get old IP information
* @param[out] ip_info: If successful, IP information will be returned in this argument.
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
*/
esp_err_t tcpip_adapter_get_old_ip_info(tcpip_adapter_if_t tcpip_if, tcpip_adapter_ip_info_t *ip_info);
/**
* @brief Set interface's old IP information
*
* When the interface successfully gets a valid IP from DHCP server or static configured, a copy of
* the IP information is set to the old IP information. When IP lost timer expires, the old IP
* information is reset to 0.
*
* @param[in] tcpip_if: the interface which we want to set old IP information
* @param[in] ip_info: store the IP information which needs to be set to specified interface
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
*/
esp_err_t tcpip_adapter_set_old_ip_info(tcpip_adapter_if_t tcpip_if, tcpip_adapter_ip_info_t *ip_info);
/**
* @brief create interface's linklocal IPv6 information
*
* @note this function will create a linklocal IPv6 address about input interface,
* if this address status changed to preferred, will call event call back ,
* notify user linklocal IPv6 address has been verified
*
* @param[in] tcpip_if: the interface which we want to set IP information
*
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
*/
esp_err_t tcpip_adapter_create_ip6_linklocal(tcpip_adapter_if_t tcpip_if);
/**
* @brief get interface's linkloacl IPv6 information
*
* There has an IPv6 information copy in adapter library, if interface is up,and IPv6 info
* is preferred,it will get IPv6 linklocal IP successfully
*
* @param[in] tcpip_if: the interface which we want to set IP information
* @param[in] if_ip6: If successful, IPv6 information will be returned in this argument.
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
*/
esp_err_t tcpip_adapter_get_ip6_linklocal(tcpip_adapter_if_t tcpip_if, ip6_addr_t *if_ip6);
#if 0
esp_err_t tcpip_adapter_get_mac(tcpip_adapter_if_t tcpip_if, uint8_t *mac);
esp_err_t tcpip_adapter_set_mac(tcpip_adapter_if_t tcpip_if, uint8_t *mac);
#endif
/**
* @brief Get DHCP server's status
*
* @param[in] tcpip_if: the interface which we will get status of DHCP server
* @param[out] status: If successful, the status of DHCP server will be return in this argument.
*
* @return ESP_OK
*/
esp_err_t tcpip_adapter_dhcps_get_status(tcpip_adapter_if_t tcpip_if, tcpip_adapter_dhcp_status_t *status);
/**
* @brief Set or Get DHCP server's option
*
* @param[in] opt_op: option operate type, 1 for SET, 2 for GET.
* @param[in] opt_id: option index, 32 for ROUTER, 50 for IP POLL, 51 for LEASE TIME, 52 for REQUEST TIME
* @param[in] opt_val: option parameter
* @param[in] opt_len: option length
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STOPPED
* ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STARTED
*/
esp_err_t tcpip_adapter_dhcps_option(tcpip_adapter_option_mode_t opt_op, tcpip_adapter_option_id_t opt_id, void *opt_val, uint32_t opt_len);
/**
* @brief Start DHCP server
*
* @note Currently DHCP server is bind to softAP interface.
*
* @param[in] tcpip_if: the interface which we will start DHCP server
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STARTED
*/
esp_err_t tcpip_adapter_dhcps_start(tcpip_adapter_if_t tcpip_if);
/**
* @brief Stop DHCP server
*
* @note Currently DHCP server is bind to softAP interface.
*
* @param[in] tcpip_if: the interface which we will stop DHCP server
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STOPED
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY
*/
esp_err_t tcpip_adapter_dhcps_stop(tcpip_adapter_if_t tcpip_if);
/**
* @brief Get DHCP client status
*
* @param[in] tcpip_if: the interface which we will get status of DHCP client
* @param[out] status: If successful, the status of DHCP client will be return in this argument.
*
* @return ESP_OK
*/
esp_err_t tcpip_adapter_dhcpc_get_status(tcpip_adapter_if_t tcpip_if, tcpip_adapter_dhcp_status_t *status);
/**
* @brief Set or Get DHCP client's option
*
* @note This function is not implement now.
*
* @param[in] opt_op: option operate type, 1 for SET, 2 for GET.
* @param[in] opt_id: option index, 32 for ROUTER, 50 for IP POLL, 51 for LEASE TIME, 52 for REQUEST TIME
* @param[in] opt_val: option parameter
* @param[in] opt_len: option length
*
* @return ESP_OK
*/
esp_err_t tcpip_adapter_dhcpc_option(tcpip_adapter_option_mode_t opt_op, tcpip_adapter_option_id_t opt_id, void *opt_val, uint32_t opt_len);
/**
* @brief Start DHCP client
*
* @note Currently DHCP client is bind to station interface.
*
* @param[in] tcpip_if: the interface which we will start DHCP client
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STARTED
* ESP_ERR_TCPIP_ADAPTER_DHCPC_START_FAILED
*/
esp_err_t tcpip_adapter_dhcpc_start(tcpip_adapter_if_t tcpip_if);
/**
* @brief Stop DHCP client
*
* @note Currently DHCP client is bind to station interface.
*
* @param[in] tcpip_if: the interface which we will stop DHCP client
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
* ESP_ERR_TCPIP_ADAPTER_DHCP_ALREADY_STOPED
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY
*/
esp_err_t tcpip_adapter_dhcpc_stop(tcpip_adapter_if_t tcpip_if);
esp_err_t tcpip_adapter_eth_input(void *buffer, uint16_t len, void *eb);
/**
* @brief Get data from station interface
*
* This function should be installed by esp_wifi_reg_rxcb, so WiFi packets will be forward to TCPIP stack.
*
* @param[in] void *buffer: the received data point
* @param[in] uint16_t len: the received data length
* @param[in] void *eb: parameter
*
* @return ESP_OK
*/
esp_err_t tcpip_adapter_sta_input(void *buffer, uint16_t len, void *eb);
/**
* @brief Get data from softAP interface
*
* This function should be installed by esp_wifi_reg_rxcb, so WiFi packets will be forward to TCPIP stack.
*
* @param[in] void *buffer: the received data point
* @param[in] uint16_t len: the received data length
* @param[in] void *eb: parameter
*
* @return ESP_OK
*/
esp_err_t tcpip_adapter_ap_input(void *buffer, uint16_t len, void *eb);
/**
* @brief Get WiFi interface index
*
* Get WiFi interface from TCPIP interface struct pointer.
*
* @param[in] void *dev: adapter interface
*
* @return ESP_IF_WIFI_STA
* ESP_IF_WIFI_AP
ESP_IF_ETH
* ESP_IF_MAX
*/
esp_interface_t tcpip_adapter_get_esp_if(void *dev);
/**
* @brief Get the station information list
*
* @param[in] wifi_sta_list_t *wifi_sta_list: station list info
* @param[out] tcpip_adapter_sta_list_t *tcpip_sta_list: station list info
*
* @return ESP_OK
* ESP_ERR_TCPIP_ADAPTER_NO_MEM
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS
*/
esp_err_t tcpip_adapter_get_sta_list(wifi_sta_list_t *wifi_sta_list, tcpip_adapter_sta_list_t *tcpip_sta_list);
#define TCPIP_HOSTNAME_MAX_SIZE 32
/**
* @brief Set the hostname to the interface
*
* @param[in] tcpip_if: the interface which we will set the hostname
* @param[in] hostname: the host name for set the interface, the max length of hostname is 32 bytes
*
* @return ESP_OK:success
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY:interface status error
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS:parameter error
*/
esp_err_t tcpip_adapter_set_hostname(tcpip_adapter_if_t tcpip_if, const char *hostname);
/**
* @brief Get the hostname from the interface
*
* @param[in] tcpip_if: the interface which we will get the hostname
* @param[in] hostname: the host name from the interface
*
* @return ESP_OK:success
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY:interface status error
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS:parameter error
*/
esp_err_t tcpip_adapter_get_hostname(tcpip_adapter_if_t tcpip_if, const char **hostname);
/**
* @brief Get the LwIP netif* that is assigned to the interface
*
* @param[in] tcpip_if: the interface which we will get the hostname
* @param[out] void ** netif: pointer to fill the resulting interface
*
* @return ESP_OK:success
* ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY:interface status error
* ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS:parameter error
*/
esp_err_t tcpip_adapter_get_netif(tcpip_adapter_if_t tcpip_if, void ** netif);
#ifdef __cplusplus
}
#endif
#endif /* _TCPIP_ADAPTER_H_ */