235 lines
6.9 KiB
C
235 lines
6.9 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ESP_MDNS_H_
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#define ESP_MDNS_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <tcpip_adapter.h>
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struct mdns_server_s;
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typedef struct mdns_server_s mdns_server_t;
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/**
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* @brief mDNS query result structure
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*
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*/
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typedef struct mdns_result_s {
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const char * host; /*!< hostname */
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const char * instance; /*!< instance */
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const char * txt; /*!< txt data */
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uint16_t priority; /*!< service priority */
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uint16_t weight; /*!< service weight */
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uint16_t port; /*!< service port */
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struct ip4_addr addr; /*!< ip4 address */
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struct ip6_addr addrv6; /*!< ip6 address */
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const struct mdns_result_s * next; /*!< next result, or NULL for the last result in the list */
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} mdns_result_t;
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/**
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* @brief Initialize mDNS on given interface
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*
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* @param tcpip_if Interface that the server will listen on
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* @param server Server pointer to populate on success
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*
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_ARG when bad tcpip_if is given
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* - ESP_ERR_INVALID_STATE when the network returned error
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* - ESP_ERR_NO_MEM on memory error
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* - ESP_ERR_WIFI_NOT_INIT when WiFi is not initialized by eps_wifi_init
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*/
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esp_err_t mdns_init(tcpip_adapter_if_t tcpip_if, mdns_server_t ** server);
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/**
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* @brief Stop and free mDNS server
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*
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* @param server mDNS Server to free
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*
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*/
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void mdns_free(mdns_server_t * server);
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/**
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* @brief Set the hostname for mDNS server
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*
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* @param server mDNS Server
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* @param hostname Hostname to set
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_ERR_NO_MEM memory error
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*/
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esp_err_t mdns_set_hostname(mdns_server_t * server, const char * hostname);
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/**
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* @brief Set the default instance name for mDNS server
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*
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* @param server mDNS Server
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* @param instance Instance name to set
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_ERR_NO_MEM memory error
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*/
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esp_err_t mdns_set_instance(mdns_server_t * server, const char * instance);
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/**
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* @brief Add service to mDNS server
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*
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* @param server mDNS Server
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* @param service service type (_http, _ftp, etc)
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* @param proto service protocol (_tcp, _udp)
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* @param port service port
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_ERR_NO_MEM memory error
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*/
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esp_err_t mdns_service_add(mdns_server_t * server, const char * service, const char * proto, uint16_t port);
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/**
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* @brief Remove service from mDNS server
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*
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* @param server mDNS Server
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* @param service service type (_http, _ftp, etc)
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* @param proto service protocol (_tcp, _udp)
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_ERR_NOT_FOUND Service not found
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* - ESP_FAIL unknown error
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*/
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esp_err_t mdns_service_remove(mdns_server_t * server, const char * service, const char * proto);
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/**
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* @brief Set instance name for service
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*
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* @param server mDNS Server
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* @param service service type (_http, _ftp, etc)
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* @param proto service protocol (_tcp, _udp)
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* @param instance instance name to set
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_ERR_NOT_FOUND Service not found
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* - ESP_ERR_NO_MEM memory error
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*/
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esp_err_t mdns_service_instance_set(mdns_server_t * server, const char * service, const char * proto, const char * instance);
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/**
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* @brief Set TXT data for service
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*
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* @param server mDNS Server
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* @param service service type (_http, _ftp, etc)
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* @param proto service protocol (_tcp, _udp)
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* @param num_items number of items in TXT data
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* @param txt string array of TXT data (eg. {"var=val","other=2"})
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_ERR_NOT_FOUND Service not found
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* - ESP_ERR_NO_MEM memory error
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*/
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esp_err_t mdns_service_txt_set(mdns_server_t * server, const char * service, const char * proto, uint8_t num_items, const char ** txt);
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/**
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* @brief Set service port
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*
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* @param server mDNS Server
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* @param service service type (_http, _ftp, etc)
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* @param proto service protocol (_tcp, _udp)
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* @param port service port
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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* - ESP_ERR_NOT_FOUND Service not found
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*/
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esp_err_t mdns_service_port_set(mdns_server_t * server, const char * service, const char * proto, uint16_t port);
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/**
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* @brief Remove and free all services from mDNS server
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*
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* @param server mDNS Server
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t mdns_service_remove_all(mdns_server_t * server);
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/**
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* @brief Query mDNS for host or service
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*
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* @param server mDNS Server
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* @param service service type or host name
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* @param proto service protocol or NULL if searching for host
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* @param timeout time to wait for answers. If 0, mdns_query_end MUST be called to end the search
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*
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* @return the number of results found
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*/
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size_t mdns_query(mdns_server_t * server, const char * service, const char * proto, uint32_t timeout);
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/**
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* @brief Stop mDNS Query started with timeout = 0
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*
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* @param server mDNS Server
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*
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* @return the number of results found
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*/
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size_t mdns_query_end(mdns_server_t * server);
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/**
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* @brief get the number of results currently in memoty
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*
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* @param server mDNS Server
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*
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* @return the number of results
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*/
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size_t mdns_result_get_count(mdns_server_t * server);
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/**
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* @brief Get mDNS Search result with given index
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*
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* @param server mDNS Server
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* @param num the index of the result
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*
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* @return the result or NULL if error
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*/
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const mdns_result_t * mdns_result_get(mdns_server_t * server, size_t num);
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/**
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* @brief Remove and free all search results from mDNS server
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*
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* @param server mDNS Server
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*
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* @return
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* - ESP_OK success
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* - ESP_ERR_INVALID_ARG Parameter error
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*/
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esp_err_t mdns_result_free(mdns_server_t * server);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ESP_MDNS_H_ */
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