465 lines
14 KiB
C
465 lines
14 KiB
C
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/*
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* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef MDNS_PRIVATE_H_
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#define MDNS_PRIVATE_H_
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#include "sdkconfig.h"
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#include "mdns.h"
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#include "esp_task.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/queue.h"
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#include "freertos/semphr.h"
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#include "esp_timer.h"
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#include "esp_system.h"
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#ifdef CONFIG_MDNS_ENABLE_DEBUG_PRINTS
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#define MDNS_ENABLE_DEBUG
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#define _mdns_dbg_printf(...) printf(__VA_ARGS__)
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#endif
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/** Number of predefined interfaces */
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#ifndef CONFIG_MDNS_PREDEF_NETIF_STA
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#define CONFIG_MDNS_PREDEF_NETIF_STA 0
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#endif
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#ifndef CONFIG_MDNS_PREDEF_NETIF_AP
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#define CONFIG_MDNS_PREDEF_NETIF_AP 0
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#endif
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#ifndef CONFIG_MDNS_PREDEF_NETIF_ETH
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#define CONFIG_MDNS_PREDEF_NETIF_ETH 0
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#endif
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#define MDNS_MAX_PREDEF_INTERFACES (CONFIG_MDNS_PREDEF_NETIF_STA + CONFIG_MDNS_PREDEF_NETIF_AP + CONFIG_MDNS_PREDEF_NETIF_ETH)
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/** Number of configured interfaces */
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#if MDNS_MAX_PREDEF_INTERFACES > CONFIG_MDNS_MAX_INTERFACES
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#warning Number of configured interfaces is less then number of predefined interfaces. Please update CONFIG_MDNS_MAX_INTERFACES.
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#define MDNS_MAX_INTERFACES (MDNS_MAX_PREDEF_INTERFACES)
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#else
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#define MDNS_MAX_INTERFACES (CONFIG_MDNS_MAX_INTERFACES)
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#endif
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/** The maximum number of services */
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#define MDNS_MAX_SERVICES CONFIG_MDNS_MAX_SERVICES
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#define MDNS_ANSWER_PTR_TTL 4500
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#define MDNS_ANSWER_TXT_TTL 4500
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#define MDNS_ANSWER_SRV_TTL 120
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#define MDNS_ANSWER_A_TTL 120
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#define MDNS_ANSWER_AAAA_TTL 120
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#define MDNS_FLAGS_QUERY_REPSONSE 0x8000
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#define MDNS_FLAGS_AUTHORITATIVE 0x0400
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#define MDNS_FLAGS_QR_AUTHORITATIVE (MDNS_FLAGS_QUERY_REPSONSE | MDNS_FLAGS_AUTHORITATIVE)
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#define MDNS_FLAGS_DISTRIBUTED 0x0200
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#define MDNS_NAME_REF 0xC000
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//custom type! only used by this implementation
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//to help manage service discovery handling
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#define MDNS_TYPE_SDPTR 0x0032
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#define MDNS_CLASS_IN 0x0001
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#define MDNS_CLASS_ANY 0x00FF
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#define MDNS_CLASS_IN_FLUSH_CACHE 0x8001
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#define MDNS_ANSWER_ALL 0x3F
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#define MDNS_ANSWER_PTR 0x08
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#define MDNS_ANSWER_TXT 0x04
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#define MDNS_ANSWER_SRV 0x02
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#define MDNS_ANSWER_A 0x01
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#define MDNS_ANSWER_AAAA 0x10
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#define MDNS_ANSWER_NSEC 0x20
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#define MDNS_ANSWER_SDPTR 0x80
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#define MDNS_ANSWER_AAAA_SIZE 16
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#define MDNS_SERVICE_PORT 5353 // UDP port that the server runs on
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#define MDNS_SERVICE_STACK_DEPTH CONFIG_MDNS_TASK_STACK_SIZE
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#define MDNS_TASK_PRIORITY CONFIG_MDNS_TASK_PRIORITY
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#if (MDNS_TASK_PRIORITY > ESP_TASK_PRIO_MAX)
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#error "mDNS task priority is higher than ESP_TASK_PRIO_MAX"
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#elif (MDNS_TASK_PRIORITY > ESP_TASKD_EVENT_PRIO)
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#warning "mDNS task priority is higher than ESP_TASKD_EVENT_PRIO, mDNS library might not work correctly"
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#endif
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#define MDNS_TASK_AFFINITY CONFIG_MDNS_TASK_AFFINITY
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#define MDNS_SERVICE_ADD_TIMEOUT_MS CONFIG_MDNS_SERVICE_ADD_TIMEOUT_MS
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#define MDNS_PACKET_QUEUE_LEN 16 // Maximum packets that can be queued for parsing
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#define MDNS_ACTION_QUEUE_LEN 16 // Maximum actions pending to the server
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#define MDNS_TXT_MAX_LEN 1024 // Maximum string length of text data in TXT record
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#if defined(CONFIG_LWIP_IPV6) && defined(CONFIG_MDNS_RESPOND_REVERSE_QUERIES)
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#define MDNS_NAME_MAX_LEN (64+4) // Need to account for IPv6 reverse queries (64 char address + ".ip6" )
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#else
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#define MDNS_NAME_MAX_LEN 64 // Maximum string length of hostname, instance, service and proto
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#endif
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#define MDNS_NAME_BUF_LEN (MDNS_NAME_MAX_LEN+1) // Maximum char buffer size to hold hostname, instance, service or proto
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#define MDNS_MAX_PACKET_SIZE 1460 // Maximum size of mDNS outgoing packet
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#define MDNS_HEAD_LEN 12
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#define MDNS_HEAD_ID_OFFSET 0
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#define MDNS_HEAD_FLAGS_OFFSET 2
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#define MDNS_HEAD_QUESTIONS_OFFSET 4
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#define MDNS_HEAD_ANSWERS_OFFSET 6
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#define MDNS_HEAD_SERVERS_OFFSET 8
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#define MDNS_HEAD_ADDITIONAL_OFFSET 10
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#define MDNS_TYPE_OFFSET 0
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#define MDNS_CLASS_OFFSET 2
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#define MDNS_TTL_OFFSET 4
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#define MDNS_LEN_OFFSET 8
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#define MDNS_DATA_OFFSET 10
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#define MDNS_SRV_PRIORITY_OFFSET 0
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#define MDNS_SRV_WEIGHT_OFFSET 2
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#define MDNS_SRV_PORT_OFFSET 4
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#define MDNS_SRV_FQDN_OFFSET 6
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#define MDNS_TIMER_PERIOD_US (CONFIG_MDNS_TIMER_PERIOD_MS*1000)
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#define MDNS_SERVICE_LOCK() xSemaphoreTake(_mdns_service_semaphore, portMAX_DELAY)
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#define MDNS_SERVICE_UNLOCK() xSemaphoreGive(_mdns_service_semaphore)
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#define queueToEnd(type, queue, item) \
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if (!queue) { \
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queue = item; \
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} else { \
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type * _q = queue; \
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while (_q->next) { _q = _q->next; } \
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_q->next = item; \
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}
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#define queueDetach(type, queue, item) \
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if (queue) { \
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if (queue == item) { \
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queue = queue->next; \
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} else { \
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type * _q = queue; \
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while (_q->next && _q->next != item) { \
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_q = _q->next; \
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} \
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if (_q->next == item) { \
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_q->next = item->next; \
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item->next = NULL; \
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} \
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} \
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}
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#define queueFree(type, queue) while (queue) { type * _q = queue; queue = queue->next; free(_q); }
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#define PCB_STATE_IS_PROBING(s) (s->state > PCB_OFF && s->state < PCB_ANNOUNCE_1)
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#define PCB_STATE_IS_ANNOUNCING(s) (s->state > PCB_PROBE_3 && s->state < PCB_RUNNING)
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#define PCB_STATE_IS_RUNNING(s) (s->state == PCB_RUNNING)
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#ifndef HOOK_MALLOC_FAILED
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#define HOOK_MALLOC_FAILED ESP_LOGE(TAG, "Cannot allocate memory (line: %d, free heap: %d bytes)", __LINE__, esp_get_free_heap_size());
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#endif
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typedef size_t mdns_if_t;
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typedef enum {
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PCB_OFF, PCB_DUP, PCB_INIT,
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PCB_PROBE_1, PCB_PROBE_2, PCB_PROBE_3,
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PCB_ANNOUNCE_1, PCB_ANNOUNCE_2, PCB_ANNOUNCE_3,
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PCB_RUNNING
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} mdns_pcb_state_t;
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typedef enum {
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MDNS_ANSWER, MDNS_NS, MDNS_EXTRA
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} mdns_parsed_record_type_t;
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typedef enum {
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ACTION_SYSTEM_EVENT,
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ACTION_HOSTNAME_SET,
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ACTION_INSTANCE_SET,
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ACTION_SERVICE_ADD,
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ACTION_SERVICE_DEL,
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ACTION_SERVICE_INSTANCE_SET,
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ACTION_SERVICE_PORT_SET,
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ACTION_SERVICE_TXT_REPLACE,
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ACTION_SERVICE_TXT_SET,
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ACTION_SERVICE_TXT_DEL,
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ACTION_SERVICE_SUBTYPE_ADD,
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ACTION_SERVICES_CLEAR,
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ACTION_SEARCH_ADD,
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ACTION_SEARCH_SEND,
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ACTION_SEARCH_END,
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ACTION_TX_HANDLE,
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ACTION_RX_HANDLE,
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ACTION_TASK_STOP,
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ACTION_DELEGATE_HOSTNAME_ADD,
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ACTION_DELEGATE_HOSTNAME_REMOVE,
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ACTION_MAX
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} mdns_action_type_t;
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typedef struct {
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uint16_t id;
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uint16_t flags;
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uint16_t questions; //QDCOUNT
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uint16_t answers; //ANCOUNT
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uint16_t servers; //NSCOUNT
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uint16_t additional;//ARCOUNT
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} mdns_header_t;
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typedef struct {
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char host[MDNS_NAME_BUF_LEN]; // hostname for A/AAAA records, instance name for SRV records
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char service[MDNS_NAME_BUF_LEN];
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char proto[MDNS_NAME_BUF_LEN];
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char domain[MDNS_NAME_BUF_LEN];
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uint8_t parts;
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uint8_t sub;
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bool invalid;
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} mdns_name_t;
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typedef struct mdns_parsed_question_s {
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struct mdns_parsed_question_s *next;
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uint16_t type;
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bool sub;
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bool unicast;
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char *host;
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char *service;
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char *proto;
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char *domain;
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} mdns_parsed_question_t;
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typedef struct mdns_parsed_record_s {
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struct mdns_parsed_record_s *next;
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mdns_parsed_record_type_t record_type;
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uint16_t type;
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uint16_t clas;
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uint8_t flush;
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uint32_t ttl;
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char *host;
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char *service;
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char *proto;
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char *domain;
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uint16_t data_len;
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uint8_t *data;
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} mdns_parsed_record_t;
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typedef struct {
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mdns_if_t tcpip_if;
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mdns_ip_protocol_t ip_protocol;
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esp_ip_addr_t src;
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uint16_t src_port;
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uint8_t multicast;
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uint8_t authoritative;
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uint8_t probe;
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uint8_t discovery;
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uint8_t distributed;
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mdns_parsed_question_t *questions;
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mdns_parsed_record_t *records;
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uint16_t id;
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} mdns_parsed_packet_t;
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typedef struct {
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mdns_if_t tcpip_if;
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mdns_ip_protocol_t ip_protocol;
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struct pbuf *pb;
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esp_ip_addr_t src;
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esp_ip_addr_t dest;
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uint16_t src_port;
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uint8_t multicast;
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} mdns_rx_packet_t;
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typedef struct mdns_txt_linked_item_s {
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const char *key; /*!< item key name */
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char *value; /*!< item value string */
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uint8_t value_len; /*!< item value length */
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struct mdns_txt_linked_item_s *next; /*!< next result, or NULL for the last result in the list */
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} mdns_txt_linked_item_t;
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typedef struct mdns_subtype_s {
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const char *subtype; /*!< subtype */
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struct mdns_subtype_s *next; /*!< next result, or NULL for the last result in the list */
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} mdns_subtype_t;
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typedef struct {
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const char *instance;
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const char *service;
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const char *proto;
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const char *hostname;
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uint16_t priority;
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uint16_t weight;
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uint16_t port;
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mdns_txt_linked_item_t *txt;
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mdns_subtype_t *subtype;
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} mdns_service_t;
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typedef struct mdns_srv_item_s {
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struct mdns_srv_item_s *next;
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mdns_service_t *service;
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} mdns_srv_item_t;
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typedef struct mdns_out_question_s {
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struct mdns_out_question_s *next;
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uint16_t type;
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bool unicast;
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const char *host;
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const char *service;
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const char *proto;
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const char *domain;
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bool own_dynamic_memory;
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} mdns_out_question_t;
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typedef struct mdns_host_item_t {
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const char *hostname;
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mdns_ip_addr_t *address_list;
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struct mdns_host_item_t *next;
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} mdns_host_item_t;
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typedef struct mdns_out_answer_s {
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struct mdns_out_answer_s *next;
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uint16_t type;
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uint8_t bye;
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uint8_t flush;
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mdns_service_t *service;
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mdns_host_item_t *host;
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const char *custom_instance;
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const char *custom_service;
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const char *custom_proto;
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} mdns_out_answer_t;
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typedef struct mdns_tx_packet_s {
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struct mdns_tx_packet_s *next;
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uint32_t send_at;
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mdns_if_t tcpip_if;
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mdns_ip_protocol_t ip_protocol;
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esp_ip_addr_t dst;
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uint16_t port;
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uint16_t flags;
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uint8_t distributed;
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mdns_out_question_t *questions;
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mdns_out_answer_t *answers;
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mdns_out_answer_t *servers;
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mdns_out_answer_t *additional;
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bool queued;
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uint16_t id;
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} mdns_tx_packet_t;
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typedef struct {
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mdns_pcb_state_t state;
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struct udp_pcb *pcb;
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mdns_srv_item_t **probe_services;
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uint8_t probe_services_len;
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|
uint8_t probe_ip;
|
||
|
|
uint8_t probe_running;
|
||
|
|
uint16_t failed_probes;
|
||
|
|
} mdns_pcb_t;
|
||
|
|
|
||
|
|
typedef enum {
|
||
|
|
SEARCH_OFF,
|
||
|
|
SEARCH_INIT,
|
||
|
|
SEARCH_RUNNING,
|
||
|
|
SEARCH_MAX
|
||
|
|
} mdns_search_once_state_t;
|
||
|
|
|
||
|
|
typedef struct mdns_search_once_s {
|
||
|
|
struct mdns_search_once_s *next;
|
||
|
|
|
||
|
|
mdns_search_once_state_t state;
|
||
|
|
uint32_t started_at;
|
||
|
|
uint32_t sent_at;
|
||
|
|
uint32_t timeout;
|
||
|
|
mdns_query_notify_t notifier;
|
||
|
|
SemaphoreHandle_t done_semaphore;
|
||
|
|
uint16_t type;
|
||
|
|
bool unicast;
|
||
|
|
uint8_t max_results;
|
||
|
|
uint8_t num_results;
|
||
|
|
char *instance;
|
||
|
|
char *service;
|
||
|
|
char *proto;
|
||
|
|
mdns_result_t *result;
|
||
|
|
} mdns_search_once_t;
|
||
|
|
|
||
|
|
typedef struct mdns_server_s {
|
||
|
|
struct {
|
||
|
|
mdns_pcb_t pcbs[MDNS_IP_PROTOCOL_MAX];
|
||
|
|
} interfaces[MDNS_MAX_INTERFACES];
|
||
|
|
const char *hostname;
|
||
|
|
const char *instance;
|
||
|
|
mdns_srv_item_t *services;
|
||
|
|
SemaphoreHandle_t lock;
|
||
|
|
QueueHandle_t action_queue;
|
||
|
|
SemaphoreHandle_t action_sema;
|
||
|
|
mdns_tx_packet_t *tx_queue_head;
|
||
|
|
mdns_search_once_t *search_once;
|
||
|
|
esp_timer_handle_t timer_handle;
|
||
|
|
} mdns_server_t;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
mdns_action_type_t type;
|
||
|
|
union {
|
||
|
|
struct {
|
||
|
|
char *hostname;
|
||
|
|
} hostname_set;
|
||
|
|
char *instance;
|
||
|
|
struct {
|
||
|
|
mdns_if_t interface;
|
||
|
|
mdns_event_actions_t event_action;
|
||
|
|
} sys_event;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
} srv_add;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
} srv_del;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
char *instance;
|
||
|
|
} srv_instance;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
uint16_t port;
|
||
|
|
} srv_port;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
mdns_txt_linked_item_t *txt;
|
||
|
|
} srv_txt_replace;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
char *key;
|
||
|
|
char *value;
|
||
|
|
uint8_t value_len;
|
||
|
|
} srv_txt_set;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
char *key;
|
||
|
|
} srv_txt_del;
|
||
|
|
struct {
|
||
|
|
mdns_srv_item_t *service;
|
||
|
|
char *subtype;
|
||
|
|
} srv_subtype_add;
|
||
|
|
struct {
|
||
|
|
mdns_search_once_t *search;
|
||
|
|
} search_add;
|
||
|
|
struct {
|
||
|
|
mdns_tx_packet_t *packet;
|
||
|
|
} tx_handle;
|
||
|
|
struct {
|
||
|
|
mdns_rx_packet_t *packet;
|
||
|
|
} rx_handle;
|
||
|
|
struct {
|
||
|
|
const char *hostname;
|
||
|
|
mdns_ip_addr_t *address_list;
|
||
|
|
} delegate_hostname;
|
||
|
|
} data;
|
||
|
|
} mdns_action_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* @brief Convert mnds if to esp-netif handle
|
||
|
|
*
|
||
|
|
* @param tcpip_if mdns supported interface as internal enum
|
||
|
|
*
|
||
|
|
* @return
|
||
|
|
* - ptr to esp-netif on success
|
||
|
|
* - NULL if no available netif for current interface index
|
||
|
|
*/
|
||
|
|
esp_netif_t *_mdns_get_esp_netif(mdns_if_t tcpip_if);
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* MDNS_PRIVATE_H_ */
|