// 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 ESP_MDNS_H_
#define ESP_MDNS_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifndef MDNS_TEST_MODE
#include <tcpip_adapter.h>
#else
#include "esp32_compat.h"
#endif
struct mdns_server_s;
typedef struct mdns_server_s mdns_server_t;
/**
* @brief mDNS query result structure
*
*/
typedef struct mdns_result_s {
const char * host; /*!< hostname */
const char * instance; /*!< instance */
const char * txt; /*!< txt data */
uint16_t priority; /*!< service priority */
uint16_t weight; /*!< service weight */
uint16_t port; /*!< service port */
struct ip4_addr addr; /*!< ip4 address */
struct ip6_addr addrv6; /*!< ip6 address */
const struct mdns_result_s * next; /*!< next result, or NULL for the last result in the list */
} mdns_result_t;
/**
* @brief Initialize mDNS on given interface
*
* @param tcpip_if Interface that the server will listen on
* @param server Server pointer to populate on success
*
* @return
* - ESP_OK on success
* - ESP_ERR_INVALID_ARG when bad tcpip_if is given
* - ESP_ERR_INVALID_STATE when the network returned error
* - ESP_ERR_NO_MEM on memory error
* - ESP_ERR_WIFI_NOT_INIT when WiFi is not initialized by eps_wifi_init
*/
esp_err_t mdns_init(tcpip_adapter_if_t tcpip_if, mdns_server_t ** server);
/**
* @brief Stop and free mDNS server
*
* @param server mDNS Server to free
*
*/
void mdns_free(mdns_server_t * server);
/**
* @brief Set the hostname for mDNS server
*
* @param server mDNS Server
* @param hostname Hostname to set
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_ERR_NO_MEM memory error
*/
esp_err_t mdns_set_hostname(mdns_server_t * server, const char * hostname);
/**
* @brief Set the default instance name for mDNS server
*
* @param server mDNS Server
* @param instance Instance name to set
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_ERR_NO_MEM memory error
*/
esp_err_t mdns_set_instance(mdns_server_t * server, const char * instance);
/**
* @brief Add service to mDNS server
*
* @param server mDNS Server
* @param service service type (_http, _ftp, etc)
* @param proto service protocol (_tcp, _udp)
* @param port service port
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_ERR_NO_MEM memory error
*/
esp_err_t mdns_service_add(mdns_server_t * server, const char * service, const char * proto, uint16_t port);
/**
* @brief Remove service from mDNS server
*
* @param server mDNS Server
* @param service service type (_http, _ftp, etc)
* @param proto service protocol (_tcp, _udp)
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_ERR_NOT_FOUND Service not found
* - ESP_FAIL unknown error
*/
esp_err_t mdns_service_remove(mdns_server_t * server, const char * service, const char * proto);
/**
* @brief Set instance name for service
*
* @param server mDNS Server
* @param service service type (_http, _ftp, etc)
* @param proto service protocol (_tcp, _udp)
* @param instance instance name to set
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_ERR_NOT_FOUND Service not found
* - ESP_ERR_NO_MEM memory error
*/
esp_err_t mdns_service_instance_set(mdns_server_t * server, const char * service, const char * proto, const char * instance);
/**
* @brief Set TXT data for service
*
* @param server mDNS Server
* @param service service type (_http, _ftp, etc)
* @param proto service protocol (_tcp, _udp)
* @param num_items number of items in TXT data
* @param txt string array of TXT data (eg. {"var=val","other=2"})
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_ERR_NOT_FOUND Service not found
* - ESP_ERR_NO_MEM memory error
*/
esp_err_t mdns_service_txt_set(mdns_server_t * server, const char * service, const char * proto, uint8_t num_items, const char ** txt);
/**
* @brief Set service port
*
* @param server mDNS Server
* @param service service type (_http, _ftp, etc)
* @param proto service protocol (_tcp, _udp)
* @param port service port
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
* - ESP_ERR_NOT_FOUND Service not found
*/
esp_err_t mdns_service_port_set(mdns_server_t * server, const char * service, const char * proto, uint16_t port);
/**
* @brief Remove and free all services from mDNS server
*
* @param server mDNS Server
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
*/
esp_err_t mdns_service_remove_all(mdns_server_t * server);
/**
* @brief Query mDNS for host or service
*
* @param server mDNS Server
* @param service service type or host name
* @param proto service protocol or NULL if searching for host
* @param timeout time to wait for answers. If 0, mdns_query_end MUST be called to end the search
*
* @return the number of results found
*/
size_t mdns_query(mdns_server_t * server, const char * service, const char * proto, uint32_t timeout);
/**
* @brief Stop mDNS Query started with timeout = 0
*
* @param server mDNS Server
*
* @return the number of results found
*/
size_t mdns_query_end(mdns_server_t * server);
/**
* @brief get the number of results currently in memoty
*
* @param server mDNS Server
*
* @return the number of results
*/
size_t mdns_result_get_count(mdns_server_t * server);
/**
* @brief Get mDNS Search result with given index
*
* @param server mDNS Server
* @param num the index of the result
*
* @return the result or NULL if error
*/
const mdns_result_t * mdns_result_get(mdns_server_t * server, size_t num);
/**
* @brief Remove and free all search results from mDNS server
*
* @param server mDNS Server
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG Parameter error
*/
esp_err_t mdns_result_free(mdns_server_t * server);
#ifdef __cplusplus
}
#endif
#endif /* ESP_MDNS_H_ */