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/* ... */
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "freertos/semphr.h"
#include "esp_log.h"
#include "esp_event.h"
#include "esp_random.h"
#include "esp_check.h"
#include "mdns.h"
#include "mdns_private.h"
#include "mdns_networking.h"
#include "mdns_mem_caps.h"13 includes
static void _mdns_browse_item_free(mdns_browse_t *browse);
static esp_err_t _mdns_send_browse_action(mdns_action_type_t type, mdns_browse_t *browse);
static esp_err_t _mdns_sync_browse_action(mdns_action_type_t type, mdns_browse_sync_t *browse_sync);
static void _mdns_browse_sync(mdns_browse_sync_t *browse_sync);
static void _mdns_browse_finish(mdns_browse_t *browse);
static void _mdns_browse_add(mdns_browse_t *browse);
static void _mdns_browse_send(mdns_browse_t *browse, mdns_if_t interface);
#if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH
#include "esp_eth.h"
#endif
#if ESP_IDF_VERSION <= ESP_IDF_VERSION_VAL(5, 1, 0)
#define MDNS_ESP_WIFI_ENABLED CONFIG_SOC_WIFI_SUPPORTED
#else
#define MDNS_ESP_WIFI_ENABLED CONFIG_ESP_WIFI_ENABLED
#endif
#if MDNS_ESP_WIFI_ENABLED && (CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP)
#include "esp_wifi.h"
#endif
#ifdef MDNS_ENABLE_DEBUG
void mdns_debug_packet(const uint8_t *data, size_t len);
#endif
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
#endif
#define _MDNS_SIZEOF_IP6_ADDR (MDNS_ANSWER_AAAA_SIZE)
static const char *MDNS_DEFAULT_DOMAIN = "local";
static const char *MDNS_SUB_STR = "_sub";
mdns_server_t *_mdns_server = NULL;
static mdns_host_item_t *_mdns_host_list = NULL;
static mdns_host_item_t _mdns_self_host;
static const char *TAG = "mdns";
static volatile TaskHandle_t _mdns_service_task_handle = NULL;
static SemaphoreHandle_t _mdns_service_semaphore = NULL;
static StackType_t *_mdns_stack_buffer;
static void _mdns_search_finish_done(void);
static mdns_search_once_t *_mdns_search_find_from(mdns_search_once_t *search, mdns_name_t *name, uint16_t type, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol);
static mdns_browse_t *_mdns_browse_find_from(mdns_browse_t *b, mdns_name_t *name, uint16_t type, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol);
static void _mdns_browse_result_add_srv(mdns_browse_t *browse, const char *hostname, const char *instance, const char *service, const char *proto,
uint16_t port, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl, mdns_browse_sync_t *out_sync_browse);
static void _mdns_browse_result_add_ip(mdns_browse_t *browse, const char *hostname, esp_ip_addr_t *ip,
mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl, mdns_browse_sync_t *out_sync_browse);
static void _mdns_browse_result_add_txt(mdns_browse_t *browse, const char *instance, const char *service, const char *proto,
mdns_txt_item_t *txt, uint8_t *txt_value_len, size_t txt_count, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol,
uint32_t ttl, mdns_browse_sync_t *out_sync_browse);
#ifdef MDNS_ENABLE_DEBUG
static void debug_printf_browse_result(mdns_result_t *r_t, mdns_browse_t *b_t);
static void debug_printf_browse_result_all(mdns_result_t *r_t);/* ... */
#endif
static void _mdns_search_result_add_ip(mdns_search_once_t *search, const char *hostname, esp_ip_addr_t *ip,
mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl);
static void _mdns_search_result_add_srv(mdns_search_once_t *search, const char *hostname, uint16_t port,
mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl);
static void _mdns_search_result_add_txt(mdns_search_once_t *search, mdns_txt_item_t *txt, uint8_t *txt_value_len,
size_t txt_count, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol,
uint32_t ttl);
static mdns_result_t *_mdns_search_result_add_ptr(mdns_search_once_t *search, const char *instance,
const char *service_type, const char *proto, mdns_if_t tcpip_if,
mdns_ip_protocol_t ip_protocol, uint32_t ttl);
static bool _mdns_append_host_list_in_services(mdns_out_answer_t **destination, mdns_srv_item_t *services[], size_t services_len, bool flush, bool bye);
static bool _mdns_append_host_list(mdns_out_answer_t **destination, bool flush, bool bye);
static void _mdns_remap_self_service_hostname(const char *old_hostname, const char *new_hostname);
static esp_err_t mdns_post_custom_action_tcpip_if(mdns_if_t mdns_if, mdns_event_actions_t event_action);
static void _mdns_query_results_free(mdns_result_t *results);
typedef enum {
MDNS_IF_STA = 0,
MDNS_IF_AP = 1,
MDNS_IF_ETH = 2,
}{ ... } mdns_predef_if_t;
typedef struct mdns_interfaces mdns_interfaces_t;
struct mdns_interfaces {
const bool predefined;
esp_netif_t *netif;
const mdns_predef_if_t predef_if;
mdns_if_t duplicate;
}{ ... };
/* ... */
static mdns_interfaces_t s_esp_netifs[MDNS_MAX_INTERFACES] = {
#if CONFIG_MDNS_PREDEF_NETIF_STA
{ .predefined = true, .netif = NULL, .predef_if = MDNS_IF_STA, .duplicate = MDNS_MAX_INTERFACES },
#endif
#if CONFIG_MDNS_PREDEF_NETIF_AP
{ .predefined = true, .netif = NULL, .predef_if = MDNS_IF_AP, .duplicate = MDNS_MAX_INTERFACES },
#endif
#if CONFIG_MDNS_PREDEF_NETIF_ETH
{ .predefined = true, .netif = NULL, .predef_if = MDNS_IF_ETH, .duplicate = MDNS_MAX_INTERFACES },
#endif
}{...};
/* ... */
static mdns_if_t mdns_if_from_preset_if(mdns_predef_if_t predef_if)
{
for (int i = 0; i < MDNS_MAX_INTERFACES; ++i) {
if (s_esp_netifs[i].predefined && s_esp_netifs[i].predef_if == predef_if) {
return i;
}{...}
}{...}
return MDNS_MAX_INTERFACES;
}{ ... }
/* ... */
static inline esp_netif_t *esp_netif_from_preset_if(mdns_predef_if_t predef_if)
{
switch (predef_if) {
case MDNS_IF_STA:
return esp_netif_get_handle_from_ifkey("WIFI_STA_DEF");...
case MDNS_IF_AP:
return esp_netif_get_handle_from_ifkey("WIFI_AP_DEF");
#if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH...
case MDNS_IF_ETH:
return esp_netif_get_handle_from_ifkey("ETH_DEF");/* ... */
#endif
default:
return NULL;...
}{...}
}{ ... }
/* ... */
esp_netif_t *_mdns_get_esp_netif(mdns_if_t tcpip_if)
{
if (tcpip_if < MDNS_MAX_INTERFACES) {
if (s_esp_netifs[tcpip_if].netif == NULL && s_esp_netifs[tcpip_if].predefined) {
s_esp_netifs[tcpip_if].netif = esp_netif_from_preset_if(s_esp_netifs[tcpip_if].predef_if);
}{...}
return s_esp_netifs[tcpip_if].netif;
}{...}
return NULL;
}{ ... }
/* ... */
static inline void _mdns_clean_netif_ptr(mdns_if_t tcpip_if)
{
if (tcpip_if < MDNS_MAX_INTERFACES) {
s_esp_netifs[tcpip_if].netif = NULL;
}{...}
}{ ... }
/* ... */
static mdns_if_t _mdns_get_if_from_esp_netif(esp_netif_t *esp_netif)
{
for (int i = 0; i < MDNS_MAX_INTERFACES; ++i) {
if (s_esp_netifs[i].netif == NULL && s_esp_netifs[i].predefined) {
s_esp_netifs[i].netif = esp_netif_from_preset_if(s_esp_netifs[i].predef_if);
}{...}
if (esp_netif == s_esp_netifs[i].netif) {
return i;
}{...}
}{...}
return MDNS_MAX_INTERFACES;
}{ ... }
static inline bool _str_null_or_empty(const char *str)
{
return (str == NULL || *str == 0);
}{ ... }
/* ... */
static char *_mdns_mangle_name(char *in)
{
char *p = strrchr(in, '-');
int suffix = 0;
if (p == NULL) {
suffix = 2;
}{...} else {
char *endp = NULL;
suffix = strtol(p + 1, &endp, 10);
if (*endp != 0) {
suffix = 2;
p = NULL;
}{...}
}{...}
char *ret;
if (p == NULL) {
ret = mdns_mem_malloc(strlen(in) + 3);
if (ret == NULL) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
sprintf(ret, "%s-2", in);
}{...} else {
size_t in_len = strlen(in);
ret = mdns_mem_malloc(in_len + 2);
if (ret == NULL) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
memcpy(ret, in, in_len);
int baseLen = p - in;
sprintf(ret + baseLen, "-%d", suffix + 1);
}{...}
return ret;
}{ ... }
static bool _mdns_service_match(const mdns_service_t *srv, const char *service, const char *proto,
const char *hostname)
{
if (!service || !proto || !srv->hostname) {
return false;
}{...}
return !strcasecmp(srv->service, service) && !strcasecmp(srv->proto, proto) &&
(_str_null_or_empty(hostname) || !strcasecmp(srv->hostname, hostname));
}{ ... }
/* ... */
static mdns_srv_item_t *_mdns_get_service_item(const char *service, const char *proto, const char *hostname)
{
mdns_srv_item_t *s = _mdns_server->services;
while (s) {
if (_mdns_service_match(s->service, service, proto, hostname)) {
return s;
}{...}
s = s->next;
}{...}
return NULL;
}{ ... }
static mdns_srv_item_t *_mdns_get_service_item_subtype(const char *subtype, const char *service, const char *proto)
{
mdns_srv_item_t *s = _mdns_server->services;
while (s) {
if (_mdns_service_match(s->service, service, proto, NULL)) {
mdns_subtype_t *subtype_item = s->service->subtype;
while (subtype_item) {
if (!strcasecmp(subtype_item->subtype, subtype)) {
return s;
}{...}
subtype_item = subtype_item->next;
}{...}
}{...}
s = s->next;
}{...}
return NULL;
}{ ... }
static mdns_host_item_t *mdns_get_host_item(const char *hostname)
{
if (hostname == NULL || strcasecmp(hostname, _mdns_server->hostname) == 0) {
return &_mdns_self_host;
}{...}
mdns_host_item_t *host = _mdns_host_list;
while (host != NULL) {
if (strcasecmp(host->hostname, hostname) == 0) {
return host;
}{...}
host = host->next;
}{...}
return NULL;
}{ ... }
static bool _mdns_can_add_more_services(void)
{
#if MDNS_MAX_SERVICES == 0
return false;
#else
mdns_srv_item_t *s = _mdns_server->services;
uint16_t service_num = 0;
while (s) {
service_num ++;
s = s->next;
if (service_num >= MDNS_MAX_SERVICES) {
return false;
}{...}
}{...}
return true;/* ... */
#endif
}{ ... }
esp_err_t _mdns_send_rx_action(mdns_rx_packet_t *packet)
{
mdns_action_t *action = NULL;
action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
return ESP_ERR_NO_MEM;
}{...}
action->type = ACTION_RX_HANDLE;
action->data.rx_handle.packet = packet;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
static const char *_mdns_get_default_instance_name(void)
{
if (_mdns_server && !_str_null_or_empty(_mdns_server->instance)) {
return _mdns_server->instance;
}{...}
if (_mdns_server && !_str_null_or_empty(_mdns_server->hostname)) {
return _mdns_server->hostname;
}{...}
return NULL;
}{ ... }
/* ... */
static const char *_mdns_get_service_instance_name(const mdns_service_t *service)
{
if (service && !_str_null_or_empty(service->instance)) {
return service->instance;
}{...}
return _mdns_get_default_instance_name();
}{ ... }
static bool _mdns_instance_name_match(const char *lhs, const char *rhs)
{
if (lhs == NULL) {
lhs = _mdns_get_default_instance_name();
}{...}
if (rhs == NULL) {
rhs = _mdns_get_default_instance_name();
}{...}
return !strcasecmp(lhs, rhs);
}{ ... }
static bool _mdns_service_match_instance(const mdns_service_t *srv, const char *instance, const char *service,
const char *proto, const char *hostname)
{
if (!service || !proto) {
return false;
}{...}
return !strcasecmp(srv->service, service) && _mdns_instance_name_match(srv->instance, instance) &&
!strcasecmp(srv->proto, proto) && (_str_null_or_empty(hostname) || !strcasecmp(srv->hostname, hostname));
}{ ... }
static mdns_srv_item_t *_mdns_get_service_item_instance(const char *instance, const char *service, const char *proto,
const char *hostname)
{
mdns_srv_item_t *s = _mdns_server->services;
while (s) {
if (instance) {
if (_mdns_service_match_instance(s->service, instance, service, proto, hostname)) {
return s;
}{...}
}{...} else {
if (_mdns_service_match(s->service, service, proto, hostname)) {
return s;
}{...}
}{...}
s = s->next;
}{...}
return NULL;
}{ ... }
/* ... */
static const uint8_t *_mdns_read_fqdn(const uint8_t *packet, const uint8_t *start, mdns_name_t *name, char *buf, size_t packet_len)
{
size_t index = 0;
const uint8_t *packet_end = packet + packet_len;
while (start + index < packet_end && start[index]) {
if (name->parts == 4) {
name->invalid = true;
}{...}
uint8_t len = start[index++];
if (len < 0xC0) {
if (len > 63) {
return NULL;
}{...}
uint8_t i;
for (i = 0; i < len; i++) {
if (start + index >= packet_end) {
return NULL;
}{...}
buf[i] = start[index++];
}{...}
buf[len] = '\0';
if (name->parts == 1 && buf[0] != '_'
&& (strcasecmp(buf, MDNS_DEFAULT_DOMAIN) != 0)
&& (strcasecmp(buf, "arpa") != 0)
#ifndef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
&& (strcasecmp(buf, "ip6") != 0)
&& (strcasecmp(buf, "in-addr") != 0)/* ... */
#endif
) {
strlcat(name->host, ".", sizeof(name->host));
strlcat(name->host, buf, sizeof(name->host));
}{...} else if (strcasecmp(buf, MDNS_SUB_STR) == 0) {
name->sub = 1;
}{...} else if (!name->invalid) {
char *mdns_name_ptrs[] = {name->host, name->service, name->proto, name->domain};
memcpy(mdns_name_ptrs[name->parts++], buf, len + 1);
}{...}
}{...} else {
size_t address = (((uint16_t)len & 0x3F) << 8) | start[index++];
if ((packet + address) >= start) {
return NULL;
}{...}
if (_mdns_read_fqdn(packet, packet + address, name, buf, packet_len)) {
return start + index;
}{...}
return NULL;
}{...}
}{...}
return start + index + 1;
}{ ... }
/* ... */
static inline void _mdns_set_u16(uint8_t *packet, uint16_t index, uint16_t value)
{
if ((index + 1) >= MDNS_MAX_PACKET_SIZE) {
return;
}{...}
packet[index] = (value >> 8) & 0xFF;
packet[index + 1] = value & 0xFF;
}{ ... }
/* ... */
static inline uint8_t _mdns_append_u8(uint8_t *packet, uint16_t *index, uint8_t value)
{
if (*index >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
packet[*index] = value;
*index += 1;
return 1;
}{ ... }
/* ... */
static inline uint8_t _mdns_append_u16(uint8_t *packet, uint16_t *index, uint16_t value)
{
if ((*index + 1) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
_mdns_append_u8(packet, index, (value >> 8) & 0xFF);
_mdns_append_u8(packet, index, value & 0xFF);
return 2;
}{ ... }
/* ... */
static inline uint8_t _mdns_append_u32(uint8_t *packet, uint16_t *index, uint32_t value)
{
if ((*index + 3) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
_mdns_append_u8(packet, index, (value >> 24) & 0xFF);
_mdns_append_u8(packet, index, (value >> 16) & 0xFF);
_mdns_append_u8(packet, index, (value >> 8) & 0xFF);
_mdns_append_u8(packet, index, value & 0xFF);
return 4;
}{ ... }
/* ... */
static inline uint8_t _mdns_append_type(uint8_t *packet, uint16_t *index, uint8_t type, bool flush, uint32_t ttl)
{
if ((*index + 10) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
uint16_t mdns_class = MDNS_CLASS_IN;
if (flush) {
mdns_class = MDNS_CLASS_IN_FLUSH_CACHE;
}{...}
if (type == MDNS_ANSWER_PTR) {
_mdns_append_u16(packet, index, MDNS_TYPE_PTR);
_mdns_append_u16(packet, index, mdns_class);
}{...} else if (type == MDNS_ANSWER_TXT) {
_mdns_append_u16(packet, index, MDNS_TYPE_TXT);
_mdns_append_u16(packet, index, mdns_class);
}{...} else if (type == MDNS_ANSWER_SRV) {
_mdns_append_u16(packet, index, MDNS_TYPE_SRV);
_mdns_append_u16(packet, index, mdns_class);
}{...} else if (type == MDNS_ANSWER_A) {
_mdns_append_u16(packet, index, MDNS_TYPE_A);
_mdns_append_u16(packet, index, mdns_class);
}{...} else if (type == MDNS_ANSWER_AAAA) {
_mdns_append_u16(packet, index, MDNS_TYPE_AAAA);
_mdns_append_u16(packet, index, mdns_class);
}{...} else {
return 0;
}{...}
_mdns_append_u32(packet, index, ttl);
_mdns_append_u16(packet, index, 0);
return 10;
}{ ... }
static inline uint8_t _mdns_append_string_with_len(uint8_t *packet, uint16_t *index, const char *string, uint8_t len)
{
if ((*index + len + 1) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
_mdns_append_u8(packet, index, len);
memcpy(packet + *index, string, len);
*index += len;
return len + 1;
}{ ... }
/* ... */
static inline uint8_t _mdns_append_string(uint8_t *packet, uint16_t *index, const char *string)
{
uint8_t len = strlen(string);
if ((*index + len + 1) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
_mdns_append_u8(packet, index, len);
memcpy(packet + *index, string, len);
*index += len;
return len + 1;
}{ ... }
/* ... */
static inline int append_one_txt_record_entry(uint8_t *packet, uint16_t *index, mdns_txt_linked_item_t *txt)
{
if (txt == NULL || txt->key == NULL) {
return -1;
}{...}
size_t key_len = strlen(txt->key);
size_t len = key_len + txt->value_len + (txt->value ? 1 : 0);
if ((*index + len + 1) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
_mdns_append_u8(packet, index, len);
memcpy(packet + *index, txt->key, key_len);
if (txt->value) {
packet[*index + key_len] = '=';
memcpy(packet + *index + key_len + 1, txt->value, txt->value_len);
}{...}
*index += len;
return len + 1;
}{ ... }
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
static inline int append_single_str(uint8_t *packet, uint16_t *index, const char *str, int len)
{
if ((*index + len + 1) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
if (!_mdns_append_u8(packet, index, len)) {
return 0;
}{...}
memcpy(packet + *index, str, len);
*index += len;
return *index;
}{...}
/* ... */
static uint16_t append_fqdn_dots(uint8_t *packet, uint16_t *index, const char *name, bool last)
{
int len = strlen(name);
char *host = (char *)name;
char *end = host;
char *start = host;
do {
end = memchr(start, '.', host + len - start);
end = end ? end : host + len;
int part_len = end - start;
if (!append_single_str(packet, index, start, part_len)) {
return 0;
}{...}
start = ++end;
}{...} while (end < name + len);
if (!append_single_str(packet, index, "arpa", sizeof("arpa") - 1)) {
return 0;
}{...}
if (!_mdns_append_u8(packet, index, 0)) {
return 0;
}{...}
return *index;
}{...}
/* ... */#endif
/* ... */
static uint16_t _mdns_append_fqdn(uint8_t *packet, uint16_t *index, const char *strings[], uint8_t count, size_t packet_len)
{
if (!count) {
return _mdns_append_u8(packet, index, 0);
}{...}
static char buf[MDNS_NAME_BUF_LEN];
uint8_t len = strlen(strings[0]);
uint8_t *len_location = (uint8_t *)memchr(packet, (char)len, *index);
while (len_location) {
mdns_name_t name;
if (memcmp(len_location + 1, strings[0], len)) {
search_next:
len_location = (uint8_t *)memchr(len_location + 1, (char)len, *index - (len_location + 1 - packet));
continue;
}{...}
name.parts = 0;
name.sub = 0;
name.invalid = false;
name.host[0] = 0;
name.service[0] = 0;
name.proto[0] = 0;
name.domain[0] = 0;
const uint8_t *content = _mdns_read_fqdn(packet, len_location, &name, buf, packet_len);
if (!content) {
goto search_next;
}{...}
if (name.parts == count) {
uint8_t i;
for (i = 0; i < count; i++) {
if (strcasecmp(strings[i], (const char *)&name + (i * (MDNS_NAME_BUF_LEN)))) {
goto search_next;
}{...}
}{...}
break;
}{...} else {
goto search_next;
}{...}
}{...}
if (!len_location) {
uint8_t written = _mdns_append_string(packet, index, strings[0]);
if (!written) {
return 0;
}{...}
return written + _mdns_append_fqdn(packet, index, &strings[1], count - 1, packet_len);
}{...}
uint16_t offset = len_location - packet;
offset |= MDNS_NAME_REF;
return _mdns_append_u16(packet, index, offset);
}{ ... }
/* ... */
static uint16_t _mdns_append_ptr_record(uint8_t *packet, uint16_t *index, const char *instance, const char *service, const char *proto, bool flush, bool bye)
{
const char *str[4];
uint16_t record_length = 0;
uint8_t part_length;
if (service == NULL) {
return 0;
}{...}
str[0] = instance;
str[1] = service;
str[2] = proto;
str[3] = MDNS_DEFAULT_DOMAIN;
part_length = _mdns_append_fqdn(packet, index, str + 1, 3, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
part_length = _mdns_append_type(packet, index, MDNS_ANSWER_PTR, false, bye ? 0 : MDNS_ANSWER_PTR_TTL);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
uint16_t data_len_location = *index - 2;
part_length = _mdns_append_fqdn(packet, index, str, 4, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
_mdns_set_u16(packet, data_len_location, part_length);
record_length += part_length;
return record_length;
}{ ... }
/* ... */
static uint16_t _mdns_append_subtype_ptr_record(uint8_t *packet, uint16_t *index, const char *instance,
const char *subtype, const char *service, const char *proto, bool flush,
bool bye)
{
const char *subtype_str[5] = {subtype, MDNS_SUB_STR, service, proto, MDNS_DEFAULT_DOMAIN};
const char *instance_str[4] = {instance, service, proto, MDNS_DEFAULT_DOMAIN};
uint16_t record_length = 0;
uint8_t part_length;
if (service == NULL) {
return 0;
}{...}
part_length = _mdns_append_fqdn(packet, index, subtype_str, ARRAY_SIZE(subtype_str), MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
part_length = _mdns_append_type(packet, index, MDNS_ANSWER_PTR, false, bye ? 0 : MDNS_ANSWER_PTR_TTL);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
uint16_t data_len_location = *index - 2;
part_length = _mdns_append_fqdn(packet, index, instance_str, ARRAY_SIZE(instance_str), MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
_mdns_set_u16(packet, data_len_location, part_length);
record_length += part_length;
return record_length;
}{ ... }
/* ... */
static uint16_t _mdns_append_sdptr_record(uint8_t *packet, uint16_t *index, mdns_service_t *service, bool flush, bool bye)
{
const char *str[3];
const char *sd_str[4];
uint16_t record_length = 0;
uint8_t part_length;
if (service == NULL) {
return 0;
}{...}
sd_str[0] = (char *)"_services";
sd_str[1] = (char *)"_dns-sd";
sd_str[2] = (char *)"_udp";
sd_str[3] = MDNS_DEFAULT_DOMAIN;
str[0] = service->service;
str[1] = service->proto;
str[2] = MDNS_DEFAULT_DOMAIN;
part_length = _mdns_append_fqdn(packet, index, sd_str, 4, MDNS_MAX_PACKET_SIZE);
record_length += part_length;
part_length = _mdns_append_type(packet, index, MDNS_ANSWER_PTR, flush, MDNS_ANSWER_PTR_TTL);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
uint16_t data_len_location = *index - 2;
part_length = _mdns_append_fqdn(packet, index, str, 3, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
_mdns_set_u16(packet, data_len_location, part_length);
record_length += part_length;
return record_length;
}{ ... }
/* ... */
static uint16_t _mdns_append_txt_record(uint8_t *packet, uint16_t *index, mdns_service_t *service, bool flush, bool bye)
{
const char *str[4];
uint16_t record_length = 0;
uint8_t part_length;
if (service == NULL) {
return 0;
}{...}
str[0] = _mdns_get_service_instance_name(service);
str[1] = service->service;
str[2] = service->proto;
str[3] = MDNS_DEFAULT_DOMAIN;
if (!str[0]) {
return 0;
}{...}
part_length = _mdns_append_fqdn(packet, index, str, 4, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
part_length = _mdns_append_type(packet, index, MDNS_ANSWER_TXT, flush, bye ? 0 : MDNS_ANSWER_TXT_TTL);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
uint16_t data_len_location = *index - 2;
uint16_t data_len = 0;
mdns_txt_linked_item_t *txt = service->txt;
while (txt) {
int l = append_one_txt_record_entry(packet, index, txt);
if (l > 0) {
data_len += l;
}{...} else if (l == 0) {
return 0;
}{...}
txt = txt->next;
}{...}
if (!data_len) {
data_len = 1;
packet[*index] = 0;
*index = *index + 1;
}{...}
_mdns_set_u16(packet, data_len_location, data_len);
record_length += data_len;
return record_length;
}{ ... }
/* ... */
static uint16_t _mdns_append_srv_record(uint8_t *packet, uint16_t *index, mdns_service_t *service, bool flush, bool bye)
{
const char *str[4];
uint16_t record_length = 0;
uint8_t part_length;
if (service == NULL) {
return 0;
}{...}
str[0] = _mdns_get_service_instance_name(service);
str[1] = service->service;
str[2] = service->proto;
str[3] = MDNS_DEFAULT_DOMAIN;
if (!str[0]) {
return 0;
}{...}
part_length = _mdns_append_fqdn(packet, index, str, 4, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
part_length = _mdns_append_type(packet, index, MDNS_ANSWER_SRV, flush, bye ? 0 : MDNS_ANSWER_SRV_TTL);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
uint16_t data_len_location = *index - 2;
part_length = 0;
part_length += _mdns_append_u16(packet, index, service->priority);
part_length += _mdns_append_u16(packet, index, service->weight);
part_length += _mdns_append_u16(packet, index, service->port);
if (part_length != 6) {
return 0;
}{...}
if (service->hostname) {
str[0] = service->hostname;
}{...} else {
str[0] = _mdns_server->hostname;
}{...}
str[1] = MDNS_DEFAULT_DOMAIN;
if (_str_null_or_empty(str[0])) {
return 0;
}{...}
part_length = _mdns_append_fqdn(packet, index, str, 2, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
_mdns_set_u16(packet, data_len_location, part_length + 6);
record_length += part_length + 6;
return record_length;
}{ ... }
#ifdef CONFIG_LWIP_IPV4
/* ... */
static uint16_t _mdns_append_a_record(uint8_t *packet, uint16_t *index, const char *hostname, uint32_t ip, bool flush, bool bye)
{
const char *str[2];
uint16_t record_length = 0;
uint8_t part_length;
str[0] = hostname;
str[1] = MDNS_DEFAULT_DOMAIN;
if (_str_null_or_empty(str[0])) {
return 0;
}{...}
part_length = _mdns_append_fqdn(packet, index, str, 2, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
part_length = _mdns_append_type(packet, index, MDNS_ANSWER_A, flush, bye ? 0 : MDNS_ANSWER_A_TTL);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
uint16_t data_len_location = *index - 2;
if ((*index + 3) >= MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
_mdns_append_u8(packet, index, ip & 0xFF);
_mdns_append_u8(packet, index, (ip >> 8) & 0xFF);
_mdns_append_u8(packet, index, (ip >> 16) & 0xFF);
_mdns_append_u8(packet, index, (ip >> 24) & 0xFF);
_mdns_set_u16(packet, data_len_location, 4);
record_length += 4;
return record_length;
}{ ... }
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
/* ... */
static uint16_t _mdns_append_aaaa_record(uint8_t *packet, uint16_t *index, const char *hostname, uint8_t *ipv6, bool flush, bool bye)
{
const char *str[2];
uint16_t record_length = 0;
uint8_t part_length;
str[0] = hostname;
str[1] = MDNS_DEFAULT_DOMAIN;
if (_str_null_or_empty(str[0])) {
return 0;
}{...}
part_length = _mdns_append_fqdn(packet, index, str, 2, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
part_length = _mdns_append_type(packet, index, MDNS_ANSWER_AAAA, flush, bye ? 0 : MDNS_ANSWER_AAAA_TTL);
if (!part_length) {
return 0;
}{...}
record_length += part_length;
uint16_t data_len_location = *index - 2;
if ((*index + MDNS_ANSWER_AAAA_SIZE) > MDNS_MAX_PACKET_SIZE) {
return 0;
}{...}
part_length = MDNS_ANSWER_AAAA_SIZE;
memcpy(packet + *index, ipv6, part_length);
*index += part_length;
_mdns_set_u16(packet, data_len_location, part_length);
record_length += part_length;
return record_length;
}{ ... }
#endif/* ... */
/* ... */
static uint16_t _mdns_append_question(uint8_t *packet, uint16_t *index, mdns_out_question_t *q)
{
uint8_t part_length;
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
if (q->host && (strstr(q->host, "in-addr") || strstr(q->host, "ip6"))) {
part_length = append_fqdn_dots(packet, index, q->host, false);
if (!part_length) {
return 0;
}{...}
}{...} else
#endif
{
const char *str[4];
uint8_t str_index = 0;
if (q->host) {
str[str_index++] = q->host;
}{...}
if (q->service) {
str[str_index++] = q->service;
}{...}
if (q->proto) {
str[str_index++] = q->proto;
}{...}
if (q->domain) {
str[str_index++] = q->domain;
}{...}
part_length = _mdns_append_fqdn(packet, index, str, str_index, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
}{...}
part_length += _mdns_append_u16(packet, index, q->type);
part_length += _mdns_append_u16(packet, index, q->unicast ? 0x8001 : 0x0001);
return part_length;
}{ ... }
/* ... */
static mdns_if_t _mdns_get_other_if(mdns_if_t tcpip_if)
{
if (tcpip_if < MDNS_MAX_INTERFACES) {
return s_esp_netifs[tcpip_if].duplicate;
}{...}
return MDNS_MAX_INTERFACES;
}{ ... }
/* ... */
static bool _mdns_if_is_dup(mdns_if_t tcpip_if)
{
mdns_if_t other_if = _mdns_get_other_if(tcpip_if);
if (other_if == MDNS_MAX_INTERFACES) {
return false;
}{...}
if (_mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V4].state == PCB_DUP
|| _mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V6].state == PCB_DUP
|| _mdns_server->interfaces[other_if].pcbs[MDNS_IP_PROTOCOL_V4].state == PCB_DUP
|| _mdns_server->interfaces[other_if].pcbs[MDNS_IP_PROTOCOL_V6].state == PCB_DUP
) {
return true;
}{...}
return false;
}{ ... }
#ifdef CONFIG_LWIP_IPV6
/* ... */
static bool _ipv6_address_is_zero(esp_ip6_addr_t ip6)
{
uint8_t i;
uint8_t *data = (uint8_t *)ip6.addr;
for (i = 0; i < _MDNS_SIZEOF_IP6_ADDR; i++) {
if (data[i]) {
return false;
}{...}
}{...}
return true;
}{ ... }
#endif/* ... */
static uint8_t _mdns_append_host_answer(uint8_t *packet, uint16_t *index, mdns_host_item_t *host,
uint8_t address_type, bool flush, bool bye)
{
mdns_ip_addr_t *addr = host->address_list;
uint8_t num_records = 0;
while (addr != NULL) {
if (addr->addr.type == address_type) {
#ifdef CONFIG_LWIP_IPV4
if (address_type == ESP_IPADDR_TYPE_V4 &&
_mdns_append_a_record(packet, index, host->hostname, addr->addr.u_addr.ip4.addr, flush, bye) <= 0) {
break;
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (address_type == ESP_IPADDR_TYPE_V6 &&
_mdns_append_aaaa_record(packet, index, host->hostname, (uint8_t *)addr->addr.u_addr.ip6.addr, flush,
bye) <= 0) {
break;
}{...}
#endif/* ... */
num_records++;
}{...}
addr = addr->next;
}{...}
return num_records;
}{ ... }
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
/* ... */
static uint8_t _mdns_append_reverse_ptr_record(uint8_t *packet, uint16_t *index, const char *name)
{
if (strstr(name, "in-addr") == NULL && strstr(name, "ip6") == NULL) {
return 0;
}{...}
if (!append_fqdn_dots(packet, index, name, false)) {
return 0;
}{...}
if (!_mdns_append_type(packet, index, MDNS_ANSWER_PTR, false, 10 )) {
return 0;
}{...}
uint16_t data_len_location = *index - 2;
const char *str[2] = { _mdns_self_host.hostname, MDNS_DEFAULT_DOMAIN };
int part_length = _mdns_append_fqdn(packet, index, str, 2, MDNS_MAX_PACKET_SIZE);
if (!part_length) {
return 0;
}{...}
_mdns_set_u16(packet, data_len_location, part_length);
return 1;
}{...}
/* ... */#endif
/* ... */
static uint8_t _mdns_append_service_ptr_answers(uint8_t *packet, uint16_t *index, mdns_service_t *service, bool flush,
bool bye)
{
uint8_t appended_answers = 0;
if (_mdns_append_ptr_record(packet, index, _mdns_get_service_instance_name(service), service->service,
service->proto, flush, bye) <= 0) {
return appended_answers;
}{...}
appended_answers++;
mdns_subtype_t *subtype = service->subtype;
while (subtype) {
appended_answers +=
(_mdns_append_subtype_ptr_record(packet, index, _mdns_get_service_instance_name(service), subtype->subtype,
service->service, service->proto, flush, bye) > 0);
subtype = subtype->next;
}{...}
return appended_answers;
}{ ... }
/* ... */
static uint8_t _mdns_append_answer(uint8_t *packet, uint16_t *index, mdns_out_answer_t *answer, mdns_if_t tcpip_if)
{
if (answer->host) {
bool is_host_valid = (&_mdns_self_host == answer->host);
mdns_host_item_t *target_host = _mdns_host_list;
while (target_host && !is_host_valid) {
if (target_host == answer->host) {
is_host_valid = true;
}{...}
target_host = target_host->next;
}{...}
if (!is_host_valid) {
return 0;
}{...}
}{...}
if (answer->type == MDNS_TYPE_PTR) {
if (answer->service) {
return _mdns_append_service_ptr_answers(packet, index, answer->service, answer->flush, answer->bye);
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
}{...} else if (answer->host && answer->host->hostname &&
(strstr(answer->host->hostname, "in-addr") || strstr(answer->host->hostname, "ip6"))) {
return _mdns_append_reverse_ptr_record(packet, index, answer->host->hostname) > 0;
#endif
}{...} else {
return _mdns_append_ptr_record(packet, index,
answer->custom_instance, answer->custom_service, answer->custom_proto,
answer->flush, answer->bye) > 0;
}{...}
}{...} else if (answer->type == MDNS_TYPE_SRV) {
return _mdns_append_srv_record(packet, index, answer->service, answer->flush, answer->bye) > 0;
}{...} else if (answer->type == MDNS_TYPE_TXT) {
return _mdns_append_txt_record(packet, index, answer->service, answer->flush, answer->bye) > 0;
}{...} else if (answer->type == MDNS_TYPE_SDPTR) {
return _mdns_append_sdptr_record(packet, index, answer->service, answer->flush, answer->bye) > 0;
}{...}
#ifdef CONFIG_LWIP_IPV4
else if (answer->type == MDNS_TYPE_A) {
if (answer->host == &_mdns_self_host) {
esp_netif_ip_info_t if_ip_info;
if (!mdns_is_netif_ready(tcpip_if, MDNS_IP_PROTOCOL_V4) && _mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V4].state != PCB_DUP) {
return 0;
}{...}
if (esp_netif_get_ip_info(_mdns_get_esp_netif(tcpip_if), &if_ip_info)) {
return 0;
}{...}
if (_mdns_append_a_record(packet, index, _mdns_server->hostname, if_ip_info.ip.addr, answer->flush, answer->bye) <= 0) {
return 0;
}{...}
if (!_mdns_if_is_dup(tcpip_if)) {
return 1;
}{...}
mdns_if_t other_if = _mdns_get_other_if(tcpip_if);
if (esp_netif_get_ip_info(_mdns_get_esp_netif(other_if), &if_ip_info)) {
return 1;
}{...}
if (_mdns_append_a_record(packet, index, _mdns_server->hostname, if_ip_info.ip.addr, answer->flush, answer->bye) > 0) {
return 2;
}{...}
return 1;
}{...} else if (answer->host != NULL) {
return _mdns_append_host_answer(packet, index, answer->host, ESP_IPADDR_TYPE_V4, answer->flush, answer->bye);
}{...}
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
else if (answer->type == MDNS_TYPE_AAAA) {
if (answer->host == &_mdns_self_host) {
struct esp_ip6_addr if_ip6s[NETIF_IPV6_MAX_NUMS];
uint8_t count = 0;
if (!mdns_is_netif_ready(tcpip_if, MDNS_IP_PROTOCOL_V6) && _mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V6].state != PCB_DUP) {
return 0;
}{...}
count = esp_netif_get_all_ip6(_mdns_get_esp_netif(tcpip_if), if_ip6s);
assert(count <= NETIF_IPV6_MAX_NUMS);
for (int i = 0; i < count; i++) {
if (_ipv6_address_is_zero(if_ip6s[i])) {
return 0;
}{...}
if (_mdns_append_aaaa_record(packet, index, _mdns_server->hostname, (uint8_t *)if_ip6s[i].addr,
answer->flush, answer->bye) <= 0) {
return 0;
}{...}
}{...}
if (!_mdns_if_is_dup(tcpip_if)) {
return count;
}{...}
mdns_if_t other_if = _mdns_get_other_if(tcpip_if);
struct esp_ip6_addr other_ip6;
if (esp_netif_get_ip6_linklocal(_mdns_get_esp_netif(other_if), &other_ip6)) {
return count;
}{...}
if (_mdns_append_aaaa_record(packet, index, _mdns_server->hostname, (uint8_t *)other_ip6.addr,
answer->flush, answer->bye) > 0) {
return 1 + count;
}{...}
return count;
}{...} else if (answer->host != NULL) {
return _mdns_append_host_answer(packet, index, answer->host, ESP_IPADDR_TYPE_V6, answer->flush,
answer->bye);
}{...}
}{...}
#endif/* ... */
return 0;
}{ ... }
/* ... */
static void _mdns_dispatch_tx_packet(mdns_tx_packet_t *p)
{
static uint8_t packet[MDNS_MAX_PACKET_SIZE];
uint16_t index = MDNS_HEAD_LEN;
memset(packet, 0, MDNS_HEAD_LEN);
mdns_out_question_t *q;
mdns_out_answer_t *a;
uint8_t count;
_mdns_set_u16(packet, MDNS_HEAD_FLAGS_OFFSET, p->flags);
_mdns_set_u16(packet, MDNS_HEAD_ID_OFFSET, p->id);
count = 0;
q = p->questions;
while (q) {
if (_mdns_append_question(packet, &index, q)) {
count++;
}{...}
q = q->next;
}{...}
_mdns_set_u16(packet, MDNS_HEAD_QUESTIONS_OFFSET, count);
count = 0;
a = p->answers;
while (a) {
count += _mdns_append_answer(packet, &index, a, p->tcpip_if);
a = a->next;
}{...}
_mdns_set_u16(packet, MDNS_HEAD_ANSWERS_OFFSET, count);
count = 0;
a = p->servers;
while (a) {
count += _mdns_append_answer(packet, &index, a, p->tcpip_if);
a = a->next;
}{...}
_mdns_set_u16(packet, MDNS_HEAD_SERVERS_OFFSET, count);
count = 0;
a = p->additional;
while (a) {
count += _mdns_append_answer(packet, &index, a, p->tcpip_if);
a = a->next;
}{...}
_mdns_set_u16(packet, MDNS_HEAD_ADDITIONAL_OFFSET, count);
#ifdef MDNS_ENABLE_DEBUG
_mdns_dbg_printf("\nTX[%lu][%lu]: ", (unsigned long)p->tcpip_if, (unsigned long)p->ip_protocol);
#ifdef CONFIG_LWIP_IPV4
if (p->dst.type == ESP_IPADDR_TYPE_V4) {
_mdns_dbg_printf("To: " IPSTR ":%u, ", IP2STR(&p->dst.u_addr.ip4), p->port);
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (p->dst.type == ESP_IPADDR_TYPE_V6) {
_mdns_dbg_printf("To: " IPV6STR ":%u, ", IPV62STR(p->dst.u_addr.ip6), p->port);
}{...}
#endif/* ... */
mdns_debug_packet(packet, index);/* ... */
#endif
_mdns_udp_pcb_write(p->tcpip_if, p->ip_protocol, &p->dst, p->port, packet, index);
}{ ... }
/* ... */
static void _mdns_free_tx_packet(mdns_tx_packet_t *packet)
{
if (!packet) {
return;
}{...}
mdns_out_question_t *q = packet->questions;
while (q) {
mdns_out_question_t *next = q->next;
if (q->own_dynamic_memory) {
mdns_mem_free((char *)q->host);
mdns_mem_free((char *)q->service);
mdns_mem_free((char *)q->proto);
mdns_mem_free((char *)q->domain);
}{...}
mdns_mem_free(q);
q = next;
}{...}
queueFree(mdns_out_answer_t, packet->answers);
queueFree(mdns_out_answer_t, packet->servers);
queueFree(mdns_out_answer_t, packet->additional);
mdns_mem_free(packet);
}{ ... }
/* ... */
static void _mdns_schedule_tx_packet(mdns_tx_packet_t *packet, uint32_t ms_after)
{
if (!packet) {
return;
}{...}
packet->send_at = (xTaskGetTickCount() * portTICK_PERIOD_MS) + ms_after;
packet->next = NULL;
if (!_mdns_server->tx_queue_head || _mdns_server->tx_queue_head->send_at > packet->send_at) {
packet->next = _mdns_server->tx_queue_head;
_mdns_server->tx_queue_head = packet;
return;
}{...}
mdns_tx_packet_t *q = _mdns_server->tx_queue_head;
while (q->next && q->next->send_at <= packet->send_at) {
q = q->next;
}{...}
packet->next = q->next;
q->next = packet;
}{ ... }
/* ... */
static void _mdns_clear_tx_queue_head(void)
{
mdns_tx_packet_t *q;
while (_mdns_server->tx_queue_head) {
q = _mdns_server->tx_queue_head;
_mdns_server->tx_queue_head = _mdns_server->tx_queue_head->next;
_mdns_free_tx_packet(q);
}{...}
}{ ... }
/* ... */
static void _mdns_clear_pcb_tx_queue_head(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
mdns_tx_packet_t *q, * p;
while (_mdns_server->tx_queue_head && _mdns_server->tx_queue_head->tcpip_if == tcpip_if && _mdns_server->tx_queue_head->ip_protocol == ip_protocol) {
q = _mdns_server->tx_queue_head;
_mdns_server->tx_queue_head = _mdns_server->tx_queue_head->next;
_mdns_free_tx_packet(q);
}{...}
if (_mdns_server->tx_queue_head) {
q = _mdns_server->tx_queue_head;
while (q->next) {
if (q->next->tcpip_if == tcpip_if && q->next->ip_protocol == ip_protocol) {
p = q->next;
q->next = p->next;
_mdns_free_tx_packet(p);
}{...} else {
q = q->next;
}{...}
}{...}
}{...}
}{ ... }
/* ... */
static mdns_tx_packet_t *_mdns_get_next_pcb_packet(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
mdns_tx_packet_t *q = _mdns_server->tx_queue_head;
while (q) {
if (q->tcpip_if == tcpip_if && q->ip_protocol == ip_protocol) {
return q;
}{...}
q = q->next;
}{...}
return NULL;
}{ ... }
/* ... */
static void _mdns_remove_scheduled_answer(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint16_t type, mdns_srv_item_t *service)
{
mdns_srv_item_t s = {NULL, NULL};
if (!service) {
service = &s;
}{...}
mdns_tx_packet_t *q = _mdns_server->tx_queue_head;
while (q) {
if (q->tcpip_if == tcpip_if && q->ip_protocol == ip_protocol && q->distributed) {
mdns_out_answer_t *a = q->answers;
if (a) {
if (a->type == type && a->service == service->service) {
q->answers = q->answers->next;
mdns_mem_free(a);
}{...} else {
while (a->next) {
if (a->next->type == type && a->next->service == service->service) {
mdns_out_answer_t *b = a->next;
a->next = b->next;
mdns_mem_free(b);
break;
}{...}
a = a->next;
}{...}
}{...}
}{...}
}{...}
q = q->next;
}{...}
}{ ... }
/* ... */
static void _mdns_dealloc_answer(mdns_out_answer_t **destination, uint16_t type, mdns_srv_item_t *service)
{
mdns_out_answer_t *d = *destination;
if (!d) {
return;
}{...}
mdns_srv_item_t s = {NULL, NULL};
if (!service) {
service = &s;
}{...}
if (d->type == type && d->service == service->service) {
*destination = d->next;
mdns_mem_free(d);
return;
}{...}
while (d->next) {
mdns_out_answer_t *a = d->next;
if (a->type == type && a->service == service->service) {
d->next = a->next;
mdns_mem_free(a);
return;
}{...}
d = d->next;
}{...}
}{ ... }
/* ... */
static bool _mdns_alloc_answer(mdns_out_answer_t **destination, uint16_t type, mdns_service_t *service,
mdns_host_item_t *host, bool flush, bool bye)
{
mdns_out_answer_t *d = *destination;
while (d) {
if (d->type == type && d->service == service && d->host == host) {
return true;
}{...}
d = d->next;
}{...}
mdns_out_answer_t *a = (mdns_out_answer_t *)mdns_mem_malloc(sizeof(mdns_out_answer_t));
if (!a) {
HOOK_MALLOC_FAILED;
return false;
}{...}
a->type = type;
a->service = service;
a->host = host;
a->custom_service = NULL;
a->bye = bye;
a->flush = flush;
a->next = NULL;
queueToEnd(mdns_out_answer_t, *destination, a);
return true;
}{ ... }
/* ... */
static mdns_tx_packet_t *_mdns_alloc_packet_default(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
mdns_tx_packet_t *packet = (mdns_tx_packet_t *)mdns_mem_malloc(sizeof(mdns_tx_packet_t));
if (!packet) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
memset((uint8_t *)packet, 0, sizeof(mdns_tx_packet_t));
packet->tcpip_if = tcpip_if;
packet->ip_protocol = ip_protocol;
packet->port = MDNS_SERVICE_PORT;
#ifdef CONFIG_LWIP_IPV4
if (ip_protocol == MDNS_IP_PROTOCOL_V4) {
esp_ip_addr_t addr = ESP_IP4ADDR_INIT(224, 0, 0, 251);
memcpy(&packet->dst, &addr, sizeof(esp_ip_addr_t));
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (ip_protocol == MDNS_IP_PROTOCOL_V6) {
esp_ip_addr_t addr = ESP_IP6ADDR_INIT(0x000002ff, 0, 0, 0xfb000000);
memcpy(&packet->dst, &addr, sizeof(esp_ip_addr_t));
}{...}
#endif/* ... */
return packet;
}{ ... }
static bool _mdns_create_answer_from_service(mdns_tx_packet_t *packet, mdns_service_t *service,
mdns_parsed_question_t *question, bool shared, bool send_flush)
{
mdns_host_item_t *host = mdns_get_host_item(service->hostname);
bool is_delegated = (host != &_mdns_self_host);
if (question->type == MDNS_TYPE_PTR || question->type == MDNS_TYPE_ANY) {
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_PTR, service, NULL, false, false) ||
!_mdns_alloc_answer(is_delegated ? &packet->additional : &packet->answers, MDNS_TYPE_SRV, service, NULL, send_flush, false) ||
!_mdns_alloc_answer(is_delegated ? &packet->additional : &packet->answers, MDNS_TYPE_TXT, service, NULL, send_flush, false) ||
!_mdns_alloc_answer((shared || is_delegated) ? &packet->additional : &packet->answers, MDNS_TYPE_A, service, host, send_flush,
false) ||
!_mdns_alloc_answer((shared || is_delegated) ? &packet->additional : &packet->answers, MDNS_TYPE_AAAA, service, host,
send_flush, false)) {
return false;
}{...}
}{...} else if (question->type == MDNS_TYPE_SRV) {
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_SRV, service, NULL, send_flush, false) ||
!_mdns_alloc_answer(&packet->additional, MDNS_TYPE_A, service, host, send_flush, false) ||
!_mdns_alloc_answer(&packet->additional, MDNS_TYPE_AAAA, service, host, send_flush, false)) {
return false;
}{...}
}{...} else if (question->type == MDNS_TYPE_TXT) {
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_TXT, service, NULL, send_flush, false)) {
return false;
}{...}
}{...} else if (question->type == MDNS_TYPE_SDPTR) {
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_SDPTR, service, NULL, false, false)) {
return false;
}{...}
}{...}
return true;
}{ ... }
static bool _mdns_create_answer_from_hostname(mdns_tx_packet_t *packet, const char *hostname, bool send_flush)
{
mdns_host_item_t *host = mdns_get_host_item(hostname);
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_A, NULL, host, send_flush, false) ||
!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_AAAA, NULL, host, send_flush, false)) {
return false;
}{...}
return true;
}{ ... }
static bool _mdns_service_match_ptr_question(const mdns_service_t *service, const mdns_parsed_question_t *question)
{
if (!_mdns_service_match(service, question->service, question->proto, NULL)) {
return false;
}{...}
if (question->sub) {
mdns_subtype_t *subtype = service->subtype;
while (subtype) {
if (!strcasecmp(subtype->subtype, question->host)) {
return true;
}{...}
subtype = subtype->next;
}{...}
return false;
}{...}
if (question->host) {
if (strcasecmp(_mdns_get_service_instance_name(service), question->host) != 0) {
return false;
}{...}
}{...}
return true;
}{ ... }
/* ... */
static void _mdns_create_answer_from_parsed_packet(mdns_parsed_packet_t *parsed_packet)
{
if (!parsed_packet->questions) {
return;
}{...}
bool send_flush = parsed_packet->src_port == MDNS_SERVICE_PORT;
bool unicast = false;
bool shared = false;
mdns_tx_packet_t *packet = _mdns_alloc_packet_default(parsed_packet->tcpip_if, parsed_packet->ip_protocol);
if (!packet) {
return;
}{...}
packet->flags = MDNS_FLAGS_QR_AUTHORITATIVE;
packet->distributed = parsed_packet->distributed;
packet->id = parsed_packet->id;
mdns_parsed_question_t *q = parsed_packet->questions;
uint32_t out_record_nums = 0;
while (q) {
shared = q->type == MDNS_TYPE_PTR || q->type == MDNS_TYPE_SDPTR || !parsed_packet->probe;
if (q->type == MDNS_TYPE_SRV || q->type == MDNS_TYPE_TXT) {
mdns_srv_item_t *service = _mdns_get_service_item_instance(q->host, q->service, q->proto, NULL);
if (service == NULL) {
q = q->next;
continue;
}{...}
if (!_mdns_create_answer_from_service(packet, service->service, q, shared, send_flush)) {
_mdns_free_tx_packet(packet);
return;
}{...} else {
out_record_nums++;
}{...}
}{...} else if (q->service && q->proto) {
mdns_srv_item_t *service = _mdns_server->services;
while (service) {
if (_mdns_service_match_ptr_question(service->service, q)) {
mdns_parsed_record_t *r = parsed_packet->records;
bool is_record_exist = false;
while (r) {
if (service->service->instance && r->host) {
if (_mdns_service_match_instance(service->service, r->host, r->service, r->proto, NULL) && r->ttl > (MDNS_ANSWER_PTR_TTL / 2)) {
is_record_exist = true;
break;
}{...}
}{...} else if (!service->service->instance && !r->host) {
if (_mdns_service_match(service->service, r->service, r->proto, NULL) && r->ttl > (MDNS_ANSWER_PTR_TTL / 2)) {
is_record_exist = true;
break;
}{...}
}{...}
r = r->next;
}{...}
if (!is_record_exist) {
if (!_mdns_create_answer_from_service(packet, service->service, q, shared, send_flush)) {
_mdns_free_tx_packet(packet);
return;
}{...} else {
out_record_nums++;
}{...}
}{...}
}{...}
service = service->next;
}{...}
}{...} else if (q->type == MDNS_TYPE_A || q->type == MDNS_TYPE_AAAA) {
if (!_mdns_create_answer_from_hostname(packet, q->host, send_flush)) {
_mdns_free_tx_packet(packet);
return;
}{...} else {
out_record_nums++;
}{...}
}{...} else if (q->type == MDNS_TYPE_ANY) {
if (!_mdns_append_host_list(&packet->answers, send_flush, false)) {
_mdns_free_tx_packet(packet);
return;
}{...} else {
out_record_nums++;
}{...}
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
}{...} else if (q->type == MDNS_TYPE_PTR) {
mdns_host_item_t *host = mdns_get_host_item(q->host);
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_PTR, NULL, host, send_flush, false)) {
_mdns_free_tx_packet(packet);
return;
}{...} else {
out_record_nums++;
}{...}
#endif
}{...} else if (!_mdns_alloc_answer(&packet->answers, q->type, NULL, NULL, send_flush, false)) {
_mdns_free_tx_packet(packet);
return;
}{...} else {
out_record_nums++;
}{...}
if (parsed_packet->src_port != MDNS_SERVICE_PORT &&
(q->type == MDNS_TYPE_ANY || q->type == MDNS_TYPE_A || q->type == MDNS_TYPE_AAAA
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
|| q->type == MDNS_TYPE_PTR
#endif
)) {
mdns_out_question_t *out_question = mdns_mem_malloc(sizeof(mdns_out_question_t));
if (out_question == NULL) {
HOOK_MALLOC_FAILED;
_mdns_free_tx_packet(packet);
return;
}{...}
out_question->type = q->type;
out_question->unicast = q->unicast;
out_question->host = q->host;
q->host = NULL;
out_question->service = q->service;
q->service = NULL;
out_question->proto = q->proto;
q->proto = NULL;
out_question->domain = q->domain;
q->domain = NULL;
out_question->next = NULL;
out_question->own_dynamic_memory = true;
queueToEnd(mdns_out_question_t, packet->questions, out_question);
}{...}
if (q->unicast) {
unicast = true;
}{...}
q = q->next;
}{...}
if (out_record_nums == 0) {
_mdns_free_tx_packet(packet);
return;
}{...}
if (unicast || !send_flush) {
memcpy(&packet->dst, &parsed_packet->src, sizeof(esp_ip_addr_t));
packet->port = parsed_packet->src_port;
}{...}
static uint8_t share_step = 0;
if (shared) {
_mdns_schedule_tx_packet(packet, 25 + (share_step * 25));
share_step = (share_step + 1) & 0x03;
}{...} else {
_mdns_dispatch_tx_packet(packet);
_mdns_free_tx_packet(packet);
}{...}
}{ ... }
/* ... */
static bool _mdns_question_exists(mdns_out_question_t *needle, mdns_out_question_t *haystack)
{
while (haystack) {
if (haystack->type == needle->type
&& haystack->host == needle->host
&& haystack->service == needle->service
&& haystack->proto == needle->proto) {
return true;
}{...}
haystack = haystack->next;
}{...}
return false;
}{ ... }
static bool _mdns_append_host(mdns_out_answer_t **destination, mdns_host_item_t *host, bool flush, bool bye)
{
if (!_mdns_alloc_answer(destination, MDNS_TYPE_A, NULL, host, flush, bye)) {
return false;
}{...}
if (!_mdns_alloc_answer(destination, MDNS_TYPE_AAAA, NULL, host, flush, bye)) {
return false;
}{...}
return true;
}{ ... }
static bool _mdns_append_host_list_in_services(mdns_out_answer_t **destination, mdns_srv_item_t *services[],
size_t services_len, bool flush, bool bye)
{
if (services == NULL) {
mdns_host_item_t *host = mdns_get_host_item(_mdns_server->hostname);
if (host != NULL) {
return _mdns_append_host(destination, host, flush, bye);
}{...}
return true;
}{...}
for (size_t i = 0; i < services_len; i++) {
mdns_host_item_t *host = mdns_get_host_item(services[i]->service->hostname);
if (!_mdns_append_host(destination, host, flush, bye)) {
return false;
}{...}
}{...}
return true;
}{ ... }
static bool _mdns_append_host_list(mdns_out_answer_t **destination, bool flush, bool bye)
{
if (!_str_null_or_empty(_mdns_server->hostname)) {
mdns_host_item_t *self_host = mdns_get_host_item(_mdns_server->hostname);
if (!_mdns_append_host(destination, self_host, flush, bye)) {
return false;
}{...}
}{...}
mdns_host_item_t *host = _mdns_host_list;
while (host != NULL) {
host = host->next;
if (!_mdns_append_host(destination, host, flush, bye)) {
return false;
}{...}
}{...}
return true;
}{ ... }
static bool _mdns_append_host_question(mdns_out_question_t **questions, const char *hostname, bool unicast)
{
mdns_out_question_t *q = (mdns_out_question_t *)mdns_mem_malloc(sizeof(mdns_out_question_t));
if (!q) {
HOOK_MALLOC_FAILED;
return false;
}{...}
q->next = NULL;
q->unicast = unicast;
q->type = MDNS_TYPE_ANY;
q->host = hostname;
q->service = NULL;
q->proto = NULL;
q->domain = MDNS_DEFAULT_DOMAIN;
q->own_dynamic_memory = false;
if (_mdns_question_exists(q, *questions)) {
mdns_mem_free(q);
}{...} else {
queueToEnd(mdns_out_question_t, *questions, q);
}{...}
return true;
}{ ... }
static bool _mdns_append_host_questions_for_services(mdns_out_question_t **questions, mdns_srv_item_t *services[],
size_t len, bool unicast)
{
if (!_str_null_or_empty(_mdns_server->hostname) &&
!_mdns_append_host_question(questions, _mdns_server->hostname, unicast)) {
return false;
}{...}
for (size_t i = 0; i < len; i++) {
if (!_mdns_append_host_question(questions, services[i]->service->hostname, unicast)) {
return false;
}{...}
}{...}
return true;
}{ ... }
/* ... */
static mdns_tx_packet_t *_mdns_create_probe_packet(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, mdns_srv_item_t *services[], size_t len, bool first, bool include_ip)
{
mdns_tx_packet_t *packet = _mdns_alloc_packet_default(tcpip_if, ip_protocol);
if (!packet) {
return NULL;
}{...}
size_t i;
for (i = 0; i < len; i++) {
mdns_out_question_t *q = (mdns_out_question_t *)mdns_mem_malloc(sizeof(mdns_out_question_t));
if (!q) {
HOOK_MALLOC_FAILED;
_mdns_free_tx_packet(packet);
return NULL;
}{...}
q->next = NULL;
q->unicast = first;
q->type = MDNS_TYPE_ANY;
q->host = _mdns_get_service_instance_name(services[i]->service);
q->service = services[i]->service->service;
q->proto = services[i]->service->proto;
q->domain = MDNS_DEFAULT_DOMAIN;
q->own_dynamic_memory = false;
if (!q->host || _mdns_question_exists(q, packet->questions)) {
mdns_mem_free(q);
continue;
}{...} else {
queueToEnd(mdns_out_question_t, packet->questions, q);
}{...}
if (!q->host || !_mdns_alloc_answer(&packet->servers, MDNS_TYPE_SRV, services[i]->service, NULL, false, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
}{...}
if (include_ip) {
if (!_mdns_append_host_questions_for_services(&packet->questions, services, len, first)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
if (!_mdns_append_host_list_in_services(&packet->servers, services, len, false, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
}{...}
return packet;
}{ ... }
/* ... */
static mdns_tx_packet_t *_mdns_create_announce_packet(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, mdns_srv_item_t *services[], size_t len, bool include_ip)
{
mdns_tx_packet_t *packet = _mdns_alloc_packet_default(tcpip_if, ip_protocol);
if (!packet) {
return NULL;
}{...}
packet->flags = MDNS_FLAGS_QR_AUTHORITATIVE;
uint8_t i;
for (i = 0; i < len; i++) {
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_SDPTR, services[i]->service, NULL, false, false)
|| !_mdns_alloc_answer(&packet->answers, MDNS_TYPE_PTR, services[i]->service, NULL, false, false)
|| !_mdns_alloc_answer(&packet->answers, MDNS_TYPE_SRV, services[i]->service, NULL, true, false)
|| !_mdns_alloc_answer(&packet->answers, MDNS_TYPE_TXT, services[i]->service, NULL, true, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
}{...}
if (include_ip) {
if (!_mdns_append_host_list_in_services(&packet->servers, services, len, true, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
}{...}
return packet;
}{ ... }
/* ... */
static mdns_tx_packet_t *_mdns_create_announce_from_probe(mdns_tx_packet_t *probe)
{
mdns_tx_packet_t *packet = _mdns_alloc_packet_default(probe->tcpip_if, probe->ip_protocol);
if (!packet) {
return NULL;
}{...}
packet->flags = MDNS_FLAGS_QR_AUTHORITATIVE;
mdns_out_answer_t *s = probe->servers;
while (s) {
if (s->type == MDNS_TYPE_SRV) {
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_SDPTR, s->service, NULL, false, false)
|| !_mdns_alloc_answer(&packet->answers, MDNS_TYPE_PTR, s->service, NULL, false, false)
|| !_mdns_alloc_answer(&packet->answers, MDNS_TYPE_SRV, s->service, NULL, true, false)
|| !_mdns_alloc_answer(&packet->answers, MDNS_TYPE_TXT, s->service, NULL, true, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
mdns_host_item_t *host = mdns_get_host_item(s->service->hostname);
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_A, NULL, host, true, false)
|| !_mdns_alloc_answer(&packet->answers, MDNS_TYPE_AAAA, NULL, host, true, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
}{...} else if (s->type == MDNS_TYPE_A || s->type == MDNS_TYPE_AAAA) {
if (!_mdns_alloc_answer(&packet->answers, s->type, NULL, s->host, true, false)) {
_mdns_free_tx_packet(packet);
return NULL;
}{...}
}{...}
s = s->next;
}{...}
return packet;
}{ ... }
/* ... */
static void _mdns_pcb_send_bye(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, mdns_srv_item_t **services, size_t len, bool include_ip)
{
mdns_tx_packet_t *packet = _mdns_alloc_packet_default(tcpip_if, ip_protocol);
if (!packet) {
return;
}{...}
packet->flags = MDNS_FLAGS_QR_AUTHORITATIVE;
size_t i;
for (i = 0; i < len; i++) {
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_PTR, services[i]->service, NULL, true, true)) {
_mdns_free_tx_packet(packet);
return;
}{...}
}{...}
if (include_ip) {
_mdns_append_host_list_in_services(&packet->answers, services, len, true, true);
}{...}
_mdns_dispatch_tx_packet(packet);
_mdns_free_tx_packet(packet);
}{ ... }
/* ... */
static void _mdns_init_pcb_probe_new_service(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, mdns_srv_item_t **services, size_t len, bool probe_ip)
{
mdns_pcb_t *pcb = &_mdns_server->interfaces[tcpip_if].pcbs[ip_protocol];
size_t services_final_len = len;
if (PCB_STATE_IS_PROBING(pcb)) {
services_final_len += pcb->probe_services_len;
}{...}
mdns_srv_item_t **_services = NULL;
if (services_final_len) {
_services = (mdns_srv_item_t **)mdns_mem_malloc(sizeof(mdns_srv_item_t *) * services_final_len);
if (!_services) {
HOOK_MALLOC_FAILED;
return;
}{...}
size_t i;
for (i = 0; i < len; i++) {
_services[i] = services[i];
}{...}
if (pcb->probe_services) {
for (i = 0; i < pcb->probe_services_len; i++) {
_services[len + i] = pcb->probe_services[i];
}{...}
mdns_mem_free(pcb->probe_services);
}{...}
}{...}
probe_ip = pcb->probe_ip || probe_ip;
pcb->probe_ip = false;
pcb->probe_services = NULL;
pcb->probe_services_len = 0;
pcb->probe_running = false;
mdns_tx_packet_t *packet = _mdns_create_probe_packet(tcpip_if, ip_protocol, _services, services_final_len, true, probe_ip);
if (!packet) {
mdns_mem_free(_services);
return;
}{...}
pcb->probe_ip = probe_ip;
pcb->probe_services = _services;
pcb->probe_services_len = services_final_len;
pcb->probe_running = true;
_mdns_schedule_tx_packet(packet, ((pcb->failed_probes > 5) ? 1000 : 120) + (esp_random() & 0x7F));
pcb->state = PCB_PROBE_1;
}{ ... }
/* ... */
static void _mdns_init_pcb_probe(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, mdns_srv_item_t **services, size_t len, bool probe_ip)
{
mdns_pcb_t *pcb = &_mdns_server->interfaces[tcpip_if].pcbs[ip_protocol];
_mdns_clear_pcb_tx_queue_head(tcpip_if, ip_protocol);
if (_str_null_or_empty(_mdns_server->hostname)) {
pcb->state = PCB_RUNNING;
return;
}{...}
if (PCB_STATE_IS_PROBING(pcb)) {
mdns_srv_item_t *new_probe_services[len];
int new_probe_service_len = 0;
bool found;
for (size_t j = 0; j < len; ++j) {
found = false;
for (int i = 0; i < pcb->probe_services_len; ++i) {
if (pcb->probe_services[i] == services[j]) {
found = true;
break;
}{...}
}{...}
if (!found) {
new_probe_services[new_probe_service_len++] = services[j];
}{...}
}{...}
_mdns_init_pcb_probe_new_service(tcpip_if, ip_protocol,
new_probe_service_len ? new_probe_services : NULL, new_probe_service_len, probe_ip);
}{...} else {
_mdns_init_pcb_probe_new_service(tcpip_if, ip_protocol, services, len, probe_ip);
}{...}
}{ ... }
/* ... */
static void _mdns_restart_pcb(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
size_t srv_count = 0;
mdns_srv_item_t *a = _mdns_server->services;
while (a) {
srv_count++;
a = a->next;
}{...}
if (srv_count == 0) {
_mdns_init_pcb_probe(tcpip_if, ip_protocol, NULL, 0, true);
return;
}{...}
mdns_srv_item_t *services[srv_count];
size_t i = 0;
a = _mdns_server->services;
while (a) {
services[i++] = a;
a = a->next;
}{...}
_mdns_init_pcb_probe(tcpip_if, ip_protocol, services, srv_count, true);
}{ ... }
/* ... */
static void _mdns_send_bye(mdns_srv_item_t **services, size_t len, bool include_ip)
{
uint8_t i, j;
if (_str_null_or_empty(_mdns_server->hostname)) {
return;
}{...}
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
for (j = 0; j < MDNS_IP_PROTOCOL_MAX; j++) {
if (mdns_is_netif_ready(i, j) && _mdns_server->interfaces[i].pcbs[j].state == PCB_RUNNING) {
_mdns_pcb_send_bye((mdns_if_t)i, (mdns_ip_protocol_t)j, services, len, include_ip);
}{...}
}{...}
}{...}
}{ ... }
/* ... */
static void _mdns_send_bye_subtype(mdns_srv_item_t *service, const char *instance_name, mdns_subtype_t *remove_subtypes)
{
uint8_t i, j;
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
for (j = 0; j < MDNS_IP_PROTOCOL_MAX; j++) {
if (mdns_is_netif_ready(i, j)) {
mdns_tx_packet_t *packet = _mdns_alloc_packet_default((mdns_if_t)i, (mdns_ip_protocol_t)j);
if (packet == NULL) {
return;
}{...}
packet->flags = MDNS_FLAGS_QR_AUTHORITATIVE;
if (!_mdns_alloc_answer(&packet->answers, MDNS_TYPE_PTR, service->service, NULL, true, true)) {
_mdns_free_tx_packet(packet);
return;
}{...}
static uint8_t pkt[MDNS_MAX_PACKET_SIZE];
uint16_t index = MDNS_HEAD_LEN;
memset(pkt, 0, MDNS_HEAD_LEN);
mdns_out_answer_t *a;
uint8_t count;
_mdns_set_u16(pkt, MDNS_HEAD_FLAGS_OFFSET, packet->flags);
_mdns_set_u16(pkt, MDNS_HEAD_ID_OFFSET, packet->id);
count = 0;
a = packet->answers;
while (a) {
if (a->type == MDNS_TYPE_PTR && a->service) {
const mdns_subtype_t *current_subtype = remove_subtypes;
while (current_subtype) {
count += (_mdns_append_subtype_ptr_record(pkt, &index, instance_name, current_subtype->subtype, a->service->service, a->service->proto, a->flush, a->bye) > 0);
current_subtype = current_subtype->next;
}{...}
}{...}
a = a->next;
}{...}
_mdns_set_u16(pkt, MDNS_HEAD_ANSWERS_OFFSET, count);
_mdns_udp_pcb_write(packet->tcpip_if, packet->ip_protocol, &packet->dst, packet->port, pkt, index);
_mdns_free_tx_packet(packet);
}{...}
}{...}
}{...}
}{ ... }
/* ... */
static void _mdns_announce_pcb(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, mdns_srv_item_t **services, size_t len, bool include_ip)
{
mdns_pcb_t *_pcb = &_mdns_server->interfaces[tcpip_if].pcbs[ip_protocol];
size_t i;
if (mdns_is_netif_ready(tcpip_if, ip_protocol)) {
if (PCB_STATE_IS_PROBING(_pcb)) {
_mdns_init_pcb_probe(tcpip_if, ip_protocol, services, len, include_ip);
}{...} else if (PCB_STATE_IS_ANNOUNCING(_pcb)) {
mdns_tx_packet_t *p = _mdns_get_next_pcb_packet(tcpip_if, ip_protocol);
if (p) {
for (i = 0; i < len; i++) {
if (!_mdns_alloc_answer(&p->answers, MDNS_TYPE_SDPTR, services[i]->service, NULL, false, false)
|| !_mdns_alloc_answer(&p->answers, MDNS_TYPE_PTR, services[i]->service, NULL, false, false)
|| !_mdns_alloc_answer(&p->answers, MDNS_TYPE_SRV, services[i]->service, NULL, true, false)
|| !_mdns_alloc_answer(&p->answers, MDNS_TYPE_TXT, services[i]->service, NULL, true, false)) {
break;
}{...}
}{...}
if (include_ip) {
_mdns_dealloc_answer(&p->additional, MDNS_TYPE_A, NULL);
_mdns_dealloc_answer(&p->additional, MDNS_TYPE_AAAA, NULL);
_mdns_append_host_list_in_services(&p->answers, services, len, true, false);
}{...}
_pcb->state = PCB_ANNOUNCE_1;
}{...}
}{...} else if (_pcb->state == PCB_RUNNING) {
if (_str_null_or_empty(_mdns_server->hostname)) {
return;
}{...}
_pcb->state = PCB_ANNOUNCE_1;
mdns_tx_packet_t *p = _mdns_create_announce_packet(tcpip_if, ip_protocol, services, len, include_ip);
if (p) {
_mdns_schedule_tx_packet(p, 0);
}{...}
}{...}
}{...}
}{ ... }
/* ... */
static void _mdns_probe_all_pcbs(mdns_srv_item_t **services, size_t len, bool probe_ip, bool clear_old_probe)
{
uint8_t i, j;
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
for (j = 0; j < MDNS_IP_PROTOCOL_MAX; j++) {
if (mdns_is_netif_ready(i, j)) {
mdns_pcb_t *_pcb = &_mdns_server->interfaces[i].pcbs[j];
if (clear_old_probe) {
mdns_mem_free(_pcb->probe_services);
_pcb->probe_services = NULL;
_pcb->probe_services_len = 0;
_pcb->probe_running = false;
}{...}
_mdns_init_pcb_probe((mdns_if_t)i, (mdns_ip_protocol_t)j, services, len, probe_ip);
}{...}
}{...}
}{...}
}{ ... }
/* ... */
static void _mdns_announce_all_pcbs(mdns_srv_item_t **services, size_t len, bool include_ip)
{
uint8_t i, j;
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
for (j = 0; j < MDNS_IP_PROTOCOL_MAX; j++) {
_mdns_announce_pcb((mdns_if_t)i, (mdns_ip_protocol_t)j, services, len, include_ip);
}{...}
}{...}
}{ ... }
/* ... */
static void _mdns_send_final_bye(bool include_ip)
{
size_t srv_count = 0;
mdns_srv_item_t *a = _mdns_server->services;
while (a) {
srv_count++;
a = a->next;
}{...}
if (!srv_count) {
return;
}{...}
mdns_srv_item_t *services[srv_count];
size_t i = 0;
a = _mdns_server->services;
while (a) {
services[i++] = a;
a = a->next;
}{...}
_mdns_send_bye(services, srv_count, include_ip);
}{ ... }
/* ... */
static void _mdns_send_bye_all_pcbs_no_instance(bool include_ip)
{
size_t srv_count = 0;
mdns_srv_item_t *a = _mdns_server->services;
while (a) {
if (!a->service->instance) {
srv_count++;
}{...}
a = a->next;
}{...}
if (!srv_count) {
return;
}{...}
mdns_srv_item_t *services[srv_count];
size_t i = 0;
a = _mdns_server->services;
while (a) {
if (!a->service->instance) {
services[i++] = a;
}{...}
a = a->next;
}{...}
_mdns_send_bye(services, srv_count, include_ip);
}{ ... }
/* ... */
static void _mdns_restart_all_pcbs_no_instance(void)
{
size_t srv_count = 0;
mdns_srv_item_t *a = _mdns_server->services;
while (a) {
if (!a->service->instance) {
srv_count++;
}{...}
a = a->next;
}{...}
if (!srv_count) {
return;
}{...}
mdns_srv_item_t *services[srv_count];
size_t i = 0;
a = _mdns_server->services;
while (a) {
if (!a->service->instance) {
services[i++] = a;
}{...}
a = a->next;
}{...}
_mdns_probe_all_pcbs(services, srv_count, false, true);
}{ ... }
/* ... */
static void _mdns_restart_all_pcbs(void)
{
_mdns_clear_tx_queue_head();
size_t srv_count = 0;
mdns_srv_item_t *a = _mdns_server->services;
while (a) {
srv_count++;
a = a->next;
}{...}
if (srv_count == 0) {
_mdns_probe_all_pcbs(NULL, 0, true, true);
return;
}{...}
mdns_srv_item_t *services[srv_count];
size_t l = 0;
a = _mdns_server->services;
while (a) {
services[l++] = a;
a = a->next;
}{...}
_mdns_probe_all_pcbs(services, srv_count, true, true);
}{ ... }
/* ... */
static mdns_txt_linked_item_t *_mdns_allocate_txt(size_t num_items, mdns_txt_item_t txt[])
{
mdns_txt_linked_item_t *new_txt = NULL;
size_t i = 0;
if (num_items) {
for (i = 0; i < num_items; i++) {
mdns_txt_linked_item_t *new_item = (mdns_txt_linked_item_t *)mdns_mem_malloc(sizeof(mdns_txt_linked_item_t));
if (!new_item) {
HOOK_MALLOC_FAILED;
break;
}{...}
new_item->key = mdns_mem_strdup(txt[i].key);
if (!new_item->key) {
mdns_mem_free(new_item);
break;
}{...}
new_item->value = mdns_mem_strdup(txt[i].value);
if (!new_item->value) {
mdns_mem_free((char *)new_item->key);
mdns_mem_free(new_item);
break;
}{...}
new_item->value_len = strlen(new_item->value);
new_item->next = new_txt;
new_txt = new_item;
}{...}
}{...}
return new_txt;
}{ ... }
/* ... */
static void _mdns_free_linked_txt(mdns_txt_linked_item_t *txt)
{
mdns_txt_linked_item_t *t;
while (txt) {
t = txt;
txt = txt->next;
mdns_mem_free((char *)t->value);
mdns_mem_free((char *)t->key);
mdns_mem_free(t);
}{...}
}{ ... }
/* ... */
static mdns_service_t *_mdns_create_service(const char *service, const char *proto, const char *hostname,
uint16_t port, const char *instance, size_t num_items,
mdns_txt_item_t txt[])
{
mdns_service_t *s = (mdns_service_t *)mdns_mem_calloc(1, sizeof(mdns_service_t));
if (!s) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
mdns_txt_linked_item_t *new_txt = _mdns_allocate_txt(num_items, txt);
if (num_items && new_txt == NULL) {
goto fail;
}{...}
s->priority = 0;
s->weight = 0;
s->instance = instance ? mdns_mem_strndup(instance, MDNS_NAME_BUF_LEN - 1) : NULL;
s->txt = new_txt;
s->port = port;
s->subtype = NULL;
if (hostname) {
s->hostname = mdns_mem_strndup(hostname, MDNS_NAME_BUF_LEN - 1);
if (!s->hostname) {
goto fail;
}{...}
}{...} else {
s->hostname = NULL;
}{...}
s->service = mdns_mem_strndup(service, MDNS_NAME_BUF_LEN - 1);
if (!s->service) {
goto fail;
}{...}
s->proto = mdns_mem_strndup(proto, MDNS_NAME_BUF_LEN - 1);
if (!s->proto) {
goto fail;
}{...}
return s;
fail:
_mdns_free_linked_txt(s->txt);
mdns_mem_free((char *)s->instance);
mdns_mem_free((char *)s->service);
mdns_mem_free((char *)s->proto);
mdns_mem_free((char *)s->hostname);
mdns_mem_free(s);
return NULL;
}{ ... }
/* ... */
static void _mdns_dealloc_scheduled_service_answers(mdns_out_answer_t **destination, mdns_service_t *service)
{
mdns_out_answer_t *d = *destination;
if (!d) {
return;
}{...}
while (d && d->service == service) {
*destination = d->next;
mdns_mem_free(d);
d = *destination;
}{...}
while (d && d->next) {
mdns_out_answer_t *a = d->next;
if (a->service == service) {
d->next = a->next;
mdns_mem_free(a);
}{...} else {
d = d->next;
}{...}
}{...}
}{ ... }
/* ... */
static void _mdns_remove_scheduled_service_packets(mdns_service_t *service)
{
if (!service) {
return;
}{...}
mdns_tx_packet_t *p = NULL;
mdns_tx_packet_t *q = _mdns_server->tx_queue_head;
while (q) {
bool had_answers = (q->answers != NULL);
_mdns_dealloc_scheduled_service_answers(&(q->answers), service);
_mdns_dealloc_scheduled_service_answers(&(q->additional), service);
_mdns_dealloc_scheduled_service_answers(&(q->servers), service);
mdns_pcb_t *_pcb = &_mdns_server->interfaces[q->tcpip_if].pcbs[q->ip_protocol];
if (mdns_is_netif_ready(q->tcpip_if, q->ip_protocol)) {
if (PCB_STATE_IS_PROBING(_pcb)) {
uint8_t i;
for (i = 0; i < _pcb->probe_services_len; i++) {
mdns_srv_item_t *s = _pcb->probe_services[i];
if (s->service == service) {
break;
}{...}
}{...}
if (i < _pcb->probe_services_len) {
if (_pcb->probe_services_len > 1) {
uint8_t n;
for (n = (i + 1); n < _pcb->probe_services_len; n++) {
_pcb->probe_services[n - 1] = _pcb->probe_services[n];
}{...}
_pcb->probe_services_len--;
}{...} else {
_pcb->probe_services_len = 0;
mdns_mem_free(_pcb->probe_services);
_pcb->probe_services = NULL;
if (!_pcb->probe_ip) {
_pcb->probe_running = false;
_pcb->state = PCB_RUNNING;
}{...}
}{...}
if (q->questions) {
mdns_out_question_t *qsn = NULL;
mdns_out_question_t *qs = q->questions;
if (qs->type == MDNS_TYPE_ANY
&& qs->service && strcmp(qs->service, service->service) == 0
&& qs->proto && strcmp(qs->proto, service->proto) == 0) {
q->questions = q->questions->next;
mdns_mem_free(qs);
}{...} else while (qs->next) {
qsn = qs->next;
if (qsn->type == MDNS_TYPE_ANY
&& qsn->service && strcmp(qsn->service, service->service) == 0
&& qsn->proto && strcmp(qsn->proto, service->proto) == 0) {
qs->next = qsn->next;
mdns_mem_free(qsn);
break;
}{...}
qs = qs->next;
}{...}
}{...}
}{...}
}{...} else if (PCB_STATE_IS_ANNOUNCING(_pcb)) {
if (had_answers && q->answers == NULL) {
_pcb->state = PCB_RUNNING;
}{...}
}{...}
}{...}
p = q;
q = q->next;
if (!p->questions && !p->answers && !p->additional && !p->servers) {
queueDetach(mdns_tx_packet_t, _mdns_server->tx_queue_head, p);
_mdns_free_tx_packet(p);
}{...}
}{...}
}{ ... }
static void _mdns_free_subtype(mdns_subtype_t *subtype)
{
while (subtype) {
mdns_subtype_t *next = subtype->next;
mdns_mem_free((char *)subtype->subtype);
mdns_mem_free(subtype);
subtype = next;
}{...}
}{ ... }
static void _mdns_free_service_subtype(mdns_service_t *service)
{
_mdns_free_subtype(service->subtype);
service->subtype = NULL;
}{ ... }
/* ... */
static void _mdns_free_service(mdns_service_t *service)
{
if (!service) {
return;
}{...}
mdns_mem_free((char *)service->instance);
mdns_mem_free((char *)service->service);
mdns_mem_free((char *)service->proto);
mdns_mem_free((char *)service->hostname);
while (service->txt) {
mdns_txt_linked_item_t *s = service->txt;
service->txt = service->txt->next;
mdns_mem_free((char *)s->key);
mdns_mem_free((char *)s->value);
mdns_mem_free(s);
}{...}
_mdns_free_service_subtype(service);
mdns_mem_free(service);
}{ ... }
/* ... */
/* ... */
static int _mdns_check_srv_collision(mdns_service_t *service, uint16_t priority, uint16_t weight, uint16_t port, const char *host, const char *domain)
{
if (_str_null_or_empty(_mdns_server->hostname)) {
return 0;
}{...}
size_t our_host_len = strlen(_mdns_server->hostname);
size_t our_len = 14 + our_host_len;
size_t their_host_len = strlen(host);
size_t their_domain_len = strlen(domain);
size_t their_len = 9 + their_host_len + their_domain_len;
if (their_len > our_len) {
return 1;
}{...} else if (their_len < our_len) {
return -1;
}{...}
uint16_t our_index = 0;
uint8_t our_data[our_len];
_mdns_append_u16(our_data, &our_index, service->priority);
_mdns_append_u16(our_data, &our_index, service->weight);
_mdns_append_u16(our_data, &our_index, service->port);
our_data[our_index++] = our_host_len;
memcpy(our_data + our_index, _mdns_server->hostname, our_host_len);
our_index += our_host_len;
our_data[our_index++] = 5;
memcpy(our_data + our_index, MDNS_DEFAULT_DOMAIN, 5);
our_index += 5;
our_data[our_index++] = 0;
uint16_t their_index = 0;
uint8_t their_data[their_len];
_mdns_append_u16(their_data, &their_index, priority);
_mdns_append_u16(their_data, &their_index, weight);
_mdns_append_u16(their_data, &their_index, port);
their_data[their_index++] = their_host_len;
memcpy(their_data + their_index, host, their_host_len);
their_index += their_host_len;
their_data[their_index++] = their_domain_len;
memcpy(their_data + their_index, domain, their_domain_len);
their_index += their_domain_len;
their_data[their_index++] = 0;
int ret = memcmp(our_data, their_data, our_len);
if (ret > 0) {
return -1;
}{...} else if (ret < 0) {
return 1;
}{...}
return 0;
}{ ... }
/* ... */
static int _mdns_check_txt_collision(mdns_service_t *service, const uint8_t *data, size_t len)
{
size_t data_len = 0;
if (len <= 1 && service->txt) {
return -1;
}{...} else if (len > 1 && !service->txt) {
return 1;
}{...} else if (len <= 1 && !service->txt) {
return 0;
}{...}
mdns_txt_linked_item_t *txt = service->txt;
while (txt) {
data_len += 1 + strlen(txt->key) + txt->value_len + (txt->value ? 1 : 0 );
txt = txt->next;
}{...}
if (len > data_len) {
return 1;
}{...} else if (len < data_len) {
return -1;
}{...}
uint8_t ours[len];
uint16_t index = 0;
txt = service->txt;
while (txt) {
append_one_txt_record_entry(ours, &index, txt);
txt = txt->next;
}{...}
int ret = memcmp(ours, data, len);
if (ret > 0) {
return -1;
}{...} else if (ret < 0) {
return 1;
}{...}
return 0;
}{ ... }
static esp_err_t mdns_pcb_deinit_local(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_proto)
{
esp_err_t err = _mdns_pcb_deinit(tcpip_if, ip_proto);
mdns_pcb_t *_pcb = &_mdns_server->interfaces[tcpip_if].pcbs[ip_proto];
if (_pcb == NULL || err != ESP_OK) {
return err;
}{...}
mdns_mem_free(_pcb->probe_services);
_pcb->state = PCB_OFF;
_pcb->probe_ip = false;
_pcb->probe_services = NULL;
_pcb->probe_services_len = 0;
_pcb->probe_running = false;
_pcb->failed_probes = 0;
return ESP_OK;
}{ ... }
/* ... */
static void _mdns_dup_interface(mdns_if_t tcpip_if)
{
uint8_t i;
mdns_if_t other_if = _mdns_get_other_if(tcpip_if);
if (other_if == MDNS_MAX_INTERFACES) {
return;
}{...}
for (i = 0; i < MDNS_IP_PROTOCOL_MAX; i++) {
if (mdns_is_netif_ready(other_if, i)) {
if (mdns_is_netif_ready(tcpip_if, i)) {
_mdns_clear_pcb_tx_queue_head(tcpip_if, i);
mdns_pcb_deinit_local(tcpip_if, i);
}{...}
_mdns_server->interfaces[tcpip_if].pcbs[i].state = PCB_DUP;
_mdns_announce_pcb(other_if, i, NULL, 0, true);
}{...}
}{...}
}{ ... }
#ifdef CONFIG_LWIP_IPV4
/* ... */
static int _mdns_check_a_collision(esp_ip4_addr_t *ip, mdns_if_t tcpip_if)
{
esp_netif_ip_info_t if_ip_info;
esp_netif_ip_info_t other_ip_info;
if (!ip->addr) {
return 1;
}{...}
if (esp_netif_get_ip_info(_mdns_get_esp_netif(tcpip_if), &if_ip_info)) {
return 1;
}{...}
int ret = memcmp((uint8_t *)&if_ip_info.ip.addr, (uint8_t *)&ip->addr, sizeof(esp_ip4_addr_t));
if (ret > 0) {
return -1;
}{...} else if (ret < 0) {
mdns_if_t other_if = _mdns_get_other_if(tcpip_if);
if (other_if == MDNS_MAX_INTERFACES) {
return 1;
}{...}
if (esp_netif_get_ip_info(_mdns_get_esp_netif(other_if), &other_ip_info)) {
return 1;
}{...}
if (ip->addr != other_ip_info.ip.addr) {
return 1;
}{...}
_mdns_dup_interface(tcpip_if);
return 2;
}{...}
return 0;
}{ ... }
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
/* ... */
static int _mdns_check_aaaa_collision(esp_ip6_addr_t *ip, mdns_if_t tcpip_if)
{
struct esp_ip6_addr if_ip6;
struct esp_ip6_addr other_ip6;
if (_ipv6_address_is_zero(*ip)) {
return 1;
}{...}
if (esp_netif_get_ip6_linklocal(_mdns_get_esp_netif(tcpip_if), &if_ip6)) {
return 1;
}{...}
int ret = memcmp((uint8_t *)&if_ip6.addr, (uint8_t *)ip->addr, _MDNS_SIZEOF_IP6_ADDR);
if (ret > 0) {
return -1;
}{...} else if (ret < 0) {
mdns_if_t other_if = _mdns_get_other_if(tcpip_if);
if (other_if == MDNS_MAX_INTERFACES) {
return 1;
}{...}
if (esp_netif_get_ip6_linklocal(_mdns_get_esp_netif(other_if), &other_ip6)) {
return 1;
}{...}
if (memcmp((uint8_t *)&other_ip6.addr, (uint8_t *)ip->addr, _MDNS_SIZEOF_IP6_ADDR)) {
return 1;
}{...}
_mdns_dup_interface(tcpip_if);
return 2;
}{...}
return 0;
}{ ... }
#endif/* ... */
static bool _hostname_is_ours(const char *hostname)
{
if (!_str_null_or_empty(_mdns_server->hostname) &&
strcasecmp(hostname, _mdns_server->hostname) == 0) {
return true;
}{...}
mdns_host_item_t *host = _mdns_host_list;
while (host != NULL) {
if (strcasecmp(hostname, host->hostname) == 0) {
return true;
}{...}
host = host->next;
}{...}
return false;
}{ ... }
/* ... */
static bool _mdns_delegate_hostname_add(const char *hostname, mdns_ip_addr_t *address_list)
{
if (_hostname_is_ours(hostname)) {
return false;
}{...}
mdns_host_item_t *host = (mdns_host_item_t *)mdns_mem_malloc(sizeof(mdns_host_item_t));
if (host == NULL) {
return false;
}{...}
host->address_list = address_list;
host->hostname = hostname;
host->next = _mdns_host_list;
_mdns_host_list = host;
return true;
}{ ... }
static void free_address_list(mdns_ip_addr_t *address_list)
{
while (address_list != NULL) {
mdns_ip_addr_t *next = address_list->next;
mdns_mem_free(address_list);
address_list = next;
}{...}
}{ ... }
static bool _mdns_delegate_hostname_set_address(const char *hostname, mdns_ip_addr_t *address_list)
{
if (!_str_null_or_empty(_mdns_server->hostname) &&
strcasecmp(hostname, _mdns_server->hostname) == 0) {
return false;
}{...}
mdns_host_item_t *host = _mdns_host_list;
while (host != NULL) {
if (strcasecmp(hostname, host->hostname) == 0) {
free_address_list(host->address_list);
host->address_list = address_list;
return true;
}{...}
host = host->next;
}{...}
return false;
}{ ... }
static mdns_ip_addr_t *copy_address_list(const mdns_ip_addr_t *address_list)
{
mdns_ip_addr_t *head = NULL;
mdns_ip_addr_t *tail = NULL;
while (address_list != NULL) {
mdns_ip_addr_t *addr = (mdns_ip_addr_t *)mdns_mem_malloc(sizeof(mdns_ip_addr_t));
if (addr == NULL) {
free_address_list(head);
return NULL;
}{...}
addr->addr = address_list->addr;
addr->next = NULL;
if (head == NULL) {
head = addr;
tail = addr;
}{...} else {
tail->next = addr;
tail = tail->next;
}{...}
address_list = address_list->next;
}{...}
return head;
}{ ... }
static void free_delegated_hostnames(void)
{
mdns_host_item_t *host = _mdns_host_list;
while (host != NULL) {
free_address_list(host->address_list);
mdns_mem_free((char *)host->hostname);
mdns_host_item_t *item = host;
host = host->next;
mdns_mem_free(item);
}{...}
_mdns_host_list = NULL;
}{ ... }
static bool _mdns_delegate_hostname_remove(const char *hostname)
{
mdns_srv_item_t *srv = _mdns_server->services;
mdns_srv_item_t *prev_srv = NULL;
while (srv) {
if (strcasecmp(srv->service->hostname, hostname) == 0) {
mdns_srv_item_t *to_free = srv;
_mdns_send_bye(&srv, 1, false);
_mdns_remove_scheduled_service_packets(srv->service);
if (prev_srv == NULL) {
_mdns_server->services = srv->next;
srv = srv->next;
}{...} else {
prev_srv->next = srv->next;
srv = srv->next;
}{...}
_mdns_free_service(to_free->service);
mdns_mem_free(to_free);
}{...} else {
prev_srv = srv;
srv = srv->next;
}{...}
}{...}
mdns_host_item_t *host = _mdns_host_list;
mdns_host_item_t *prev_host = NULL;
while (host != NULL) {
if (strcasecmp(hostname, host->hostname) == 0) {
if (prev_host == NULL) {
_mdns_host_list = host->next;
}{...} else {
prev_host->next = host->next;
}{...}
free_address_list(host->address_list);
mdns_mem_free((char *)host->hostname);
mdns_mem_free(host);
break;
}{...} else {
prev_host = host;
host = host->next;
}{...}
}{...}
return true;
}{ ... }
/* ... */
static bool _mdns_name_is_discovery(mdns_name_t *name, uint16_t type)
{
return (
(name->host[0] && !strcasecmp(name->host, "_services"))
&& (name->service[0] && !strcasecmp(name->service, "_dns-sd"))
&& (name->proto[0] && !strcasecmp(name->proto, "_udp"))
&& (name->domain[0] && !strcasecmp(name->domain, MDNS_DEFAULT_DOMAIN))
&& type == MDNS_TYPE_PTR
);
}{ ... }
/* ... */
static bool _mdns_name_is_selfhosted(mdns_name_t *name)
{
if (_str_null_or_empty(_mdns_server->hostname)) {
return false;
}{...}
if (_str_null_or_empty(name->service) && _str_null_or_empty(name->proto) &&
strcasecmp(name->host, _mdns_server->hostname) == 0) {
return true;
}{...}
mdns_srv_item_t *srv = _mdns_get_service_item(name->service, name->proto, NULL);
if (srv && strcasecmp(_mdns_server->hostname, srv->service->hostname) == 0) {
return true;
}{...}
return false;
}{ ... }
/* ... */
static bool _mdns_name_is_ours(mdns_name_t *name)
{
if (_str_null_or_empty(name->domain) || (strcasecmp(name->domain, MDNS_DEFAULT_DOMAIN)
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
&& strcasecmp(name->domain, "arpa")
#endif
)) {
return false;
}{...}
if (_str_null_or_empty(name->service) && _str_null_or_empty(name->proto)) {
if (!_str_null_or_empty(name->host)
&& !_str_null_or_empty(_mdns_server->hostname)
&& _hostname_is_ours(name->host)) {
return true;
}{...}
return false;
}{...}
if (_str_null_or_empty(name->service) || _str_null_or_empty(name->proto)) {
return false;
}{...}
mdns_srv_item_t *service;
if (name->sub) {
service = _mdns_get_service_item_subtype(name->host, name->service, name->proto);
}{...} else if (_str_null_or_empty(name->host)) {
service = _mdns_get_service_item(name->service, name->proto, NULL);
}{...} else {
service = _mdns_get_service_item_instance(name->host, name->service, name->proto, NULL);
}{...}
if (!service) {
return false;
}{...}
if (name->sub || _str_null_or_empty(name->host)) {
return true;
}{...}
const char *instance = _mdns_get_service_instance_name(service->service);
if (instance == NULL) {
return false;
}{...}
if (strcasecmp(name->host, instance) == 0) {
return true;
}{...}
return false;
}{ ... }
/* ... */
static inline uint16_t _mdns_read_u16(const uint8_t *packet, uint16_t index)
{
return (uint16_t)(packet[index]) << 8 | packet[index + 1];
}{ ... }
/* ... */
static inline uint32_t _mdns_read_u32(const uint8_t *packet, uint16_t index)
{
return (uint32_t)(packet[index]) << 24 | (uint32_t)(packet[index + 1]) << 16 | (uint32_t)(packet[index + 2]) << 8 | packet[index + 3];
}{ ... }
/* ... */
static const uint8_t *_mdns_parse_fqdn(const uint8_t *packet, const uint8_t *start, mdns_name_t *name, size_t packet_len)
{
name->parts = 0;
name->sub = 0;
name->host[0] = 0;
name->service[0] = 0;
name->proto[0] = 0;
name->domain[0] = 0;
name->invalid = false;
static char buf[MDNS_NAME_BUF_LEN];
const uint8_t *next_data = (uint8_t *)_mdns_read_fqdn(packet, start, name, buf, packet_len);
if (!next_data) {
return 0;
}{...}
if (!name->parts || name->invalid) {
return next_data;
}{...}
if (name->parts == 3) {
memmove((uint8_t *)name + (MDNS_NAME_BUF_LEN), (uint8_t *)name, 3 * (MDNS_NAME_BUF_LEN));
name->host[0] = 0;
}{...} else if (name->parts == 2) {
memmove((uint8_t *)(name->domain), (uint8_t *)(name->service), (MDNS_NAME_BUF_LEN));
name->service[0] = 0;
name->proto[0] = 0;
}{...}
if (strcasecmp(name->domain, MDNS_DEFAULT_DOMAIN) == 0 || strcasecmp(name->domain, "arpa") == 0) {
return next_data;
}{...}
name->invalid = true;
return next_data;
}{ ... }
/* ... */
static bool _mdns_question_matches(mdns_parsed_question_t *question, uint16_t type, mdns_srv_item_t *service)
{
if (question->type != type) {
return false;
}{...}
if (type == MDNS_TYPE_A || type == MDNS_TYPE_AAAA) {
return true;
}{...} else if (type == MDNS_TYPE_PTR || type == MDNS_TYPE_SDPTR) {
if (question->service && question->proto && question->domain
&& !strcasecmp(service->service->service, question->service)
&& !strcasecmp(service->service->proto, question->proto)
&& !strcasecmp(MDNS_DEFAULT_DOMAIN, question->domain)) {
if (!service->service->instance) {
return true;
}{...} else if (service->service->instance && question->host && !strcasecmp(service->service->instance, question->host)) {
return true;
}{...}
}{...}
}{...} else if (service && (type == MDNS_TYPE_SRV || type == MDNS_TYPE_TXT)) {
const char *name = _mdns_get_service_instance_name(service->service);
if (name && question->host && question->service && question->proto && question->domain
&& !strcasecmp(name, question->host)
&& !strcasecmp(service->service->service, question->service)
&& !strcasecmp(service->service->proto, question->proto)
&& !strcasecmp(MDNS_DEFAULT_DOMAIN, question->domain)) {
return true;
}{...}
}{...}
return false;
}{ ... }
/* ... */
static void _mdns_remove_parsed_question(mdns_parsed_packet_t *parsed_packet, uint16_t type, mdns_srv_item_t *service)
{
mdns_parsed_question_t *q = parsed_packet->questions;
if (_mdns_question_matches(q, type, service)) {
parsed_packet->questions = q->next;
mdns_mem_free(q->host);
mdns_mem_free(q->service);
mdns_mem_free(q->proto);
mdns_mem_free(q->domain);
mdns_mem_free(q);
return;
}{...}
while (q->next) {
mdns_parsed_question_t *p = q->next;
if (_mdns_question_matches(p, type, service)) {
q->next = p->next;
mdns_mem_free(p->host);
mdns_mem_free(p->service);
mdns_mem_free(p->proto);
mdns_mem_free(p->domain);
mdns_mem_free(p);
return;
}{...}
q = q->next;
}{...}
}{ ... }
/* ... */
static int _mdns_txt_items_count_get(const uint8_t *data, size_t len)
{
if (len == 1) {
return 0;
}{...}
int num_items = 0;
uint16_t i = 0;
size_t partLen = 0;
while (i < len) {
partLen = data[i++];
if (!partLen) {
break;
}{...}
if ((i + partLen) > len) {
return -1;
}{...}
i += partLen;
num_items++;
}{...}
return num_items;
}{ ... }
/* ... */
static int _mdns_txt_item_name_get_len(const uint8_t *data, size_t len)
{
if (*data == '=') {
return -1;
}{...}
for (size_t i = 0; i < len; i++) {
if (data[i] == '=') {
return i;
}{...}
}{...}
return len;
}{ ... }
/* ... */
static void _mdns_result_txt_create(const uint8_t *data, size_t len, mdns_txt_item_t **out_txt, uint8_t **out_value_len,
size_t *out_count)
{
*out_txt = NULL;
*out_count = 0;
uint16_t i = 0, y;
size_t partLen = 0;
int num_items = _mdns_txt_items_count_get(data, len);
if (num_items < 0 || num_items > SIZE_MAX / sizeof(mdns_txt_item_t)) {
return;
}{...}
if (!num_items) {
return;
}{...}
mdns_txt_item_t *txt = (mdns_txt_item_t *)mdns_mem_malloc(sizeof(mdns_txt_item_t) * num_items);
if (!txt) {
HOOK_MALLOC_FAILED;
return;
}{...}
uint8_t *txt_value_len = (uint8_t *)mdns_mem_malloc(num_items);
if (!txt_value_len) {
mdns_mem_free(txt);
HOOK_MALLOC_FAILED;
return;
}{...}
memset(txt, 0, sizeof(mdns_txt_item_t) * num_items);
memset(txt_value_len, 0, num_items);
size_t txt_num = 0;
while (i < len) {
partLen = data[i++];
if (!partLen) {
break;
}{...}
if ((i + partLen) > len) {
goto handle_error;
}{...}
int name_len = _mdns_txt_item_name_get_len(data + i, partLen);
if (name_len < 0) {
i += partLen;
continue;
}{...}
char *key = (char *)mdns_mem_malloc(name_len + 1);
if (!key) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
mdns_txt_item_t *t = &txt[txt_num];
uint8_t *value_len = &txt_value_len[txt_num];
txt_num++;
memcpy(key, data + i, name_len);
key[name_len] = 0;
i += name_len + 1;
t->key = key;
int new_value_len = partLen - name_len - 1;
if (new_value_len > 0) {
char *value = (char *)mdns_mem_malloc(new_value_len + 1);
if (!value) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
memcpy(value, data + i, new_value_len);
value[new_value_len] = 0;
*value_len = new_value_len;
i += new_value_len;
t->value = value;
}{...}
}{...}
*out_txt = txt;
*out_count = txt_num;
*out_value_len = txt_value_len;
return;
handle_error :
for (y = 0; y < txt_num; y++) {
mdns_txt_item_t *t = &txt[y];
mdns_mem_free((char *)t->key);
mdns_mem_free((char *)t->value);
}{...}
mdns_mem_free(txt_value_len);
mdns_mem_free(txt);
}{ ... }
/* ... */
static esp_err_t _mdns_strdup_check(char **out, char *in)
{
if (in && in[0]) {
*out = mdns_mem_strdup(in);
if (!*out) {
return ESP_FAIL;
}{...}
return ESP_OK;
}{...}
*out = NULL;
return ESP_OK;
}{ ... }
/* ... */
void mdns_parse_packet(mdns_rx_packet_t *packet)
{
static mdns_name_t n;
mdns_header_t header;
const uint8_t *data = _mdns_get_packet_data(packet);
size_t len = _mdns_get_packet_len(packet);
const uint8_t *content = data + MDNS_HEAD_LEN;
bool do_not_reply = false;
mdns_search_once_t *search_result = NULL;
mdns_browse_t *browse_result = NULL;
char *browse_result_instance = NULL;
char *browse_result_service = NULL;
char *browse_result_proto = NULL;
mdns_browse_sync_t *out_sync_browse = NULL;
#ifdef MDNS_ENABLE_DEBUG
_mdns_dbg_printf("\nRX[%lu][%lu]: ", (unsigned long)packet->tcpip_if, (unsigned long)packet->ip_protocol);
#ifdef CONFIG_LWIP_IPV4
if (packet->src.type == ESP_IPADDR_TYPE_V4) {
_mdns_dbg_printf("From: " IPSTR ":%u, To: " IPSTR ", ", IP2STR(&packet->src.u_addr.ip4), packet->src_port, IP2STR(&packet->dest.u_addr.ip4));
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (packet->src.type == ESP_IPADDR_TYPE_V6) {
_mdns_dbg_printf("From: " IPV6STR ":%u, To: " IPV6STR ", ", IPV62STR(packet->src.u_addr.ip6), packet->src_port, IPV62STR(packet->dest.u_addr.ip6));
}{...}
#endif/* ... */
mdns_debug_packet(data, len);/* ... */
#endif
#ifndef CONFIG_MDNS_SKIP_SUPPRESSING_OWN_QUERIES
#ifdef CONFIG_LWIP_IPV4
if (packet->ip_protocol == MDNS_IP_PROTOCOL_V4) {
esp_netif_ip_info_t if_ip_info;
if (esp_netif_get_ip_info(_mdns_get_esp_netif(packet->tcpip_if), &if_ip_info) == ESP_OK &&
memcmp(&if_ip_info.ip.addr, &packet->src.u_addr.ip4.addr, sizeof(esp_ip4_addr_t)) == 0) {
return;
}{...}
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (packet->ip_protocol == MDNS_IP_PROTOCOL_V6) {
struct esp_ip6_addr if_ip6;
if (esp_netif_get_ip6_linklocal(_mdns_get_esp_netif(packet->tcpip_if), &if_ip6) == ESP_OK &&
memcmp(&if_ip6, &packet->src.u_addr.ip6, sizeof(esp_ip6_addr_t)) == 0) {
return;
}{...}
}{...}
#endif/* ... */ /* ... */
#endif
if (len <= MDNS_HEAD_ADDITIONAL_OFFSET) {
return;
}{...}
mdns_parsed_packet_t *parsed_packet = (mdns_parsed_packet_t *)mdns_mem_malloc(sizeof(mdns_parsed_packet_t));
if (!parsed_packet) {
HOOK_MALLOC_FAILED;
return;
}{...}
memset(parsed_packet, 0, sizeof(mdns_parsed_packet_t));
mdns_name_t *name = &n;
memset(name, 0, sizeof(mdns_name_t));
header.id = _mdns_read_u16(data, MDNS_HEAD_ID_OFFSET);
header.flags = _mdns_read_u16(data, MDNS_HEAD_FLAGS_OFFSET);
header.questions = _mdns_read_u16(data, MDNS_HEAD_QUESTIONS_OFFSET);
header.answers = _mdns_read_u16(data, MDNS_HEAD_ANSWERS_OFFSET);
header.servers = _mdns_read_u16(data, MDNS_HEAD_SERVERS_OFFSET);
header.additional = _mdns_read_u16(data, MDNS_HEAD_ADDITIONAL_OFFSET);
if (header.flags == MDNS_FLAGS_QR_AUTHORITATIVE && packet->src_port != MDNS_SERVICE_PORT) {
mdns_mem_free(parsed_packet);
return;
}{...}
if (header.questions && !header.answers && _str_null_or_empty(_mdns_server->hostname)) {
mdns_mem_free(parsed_packet);
return;
}{...}
parsed_packet->tcpip_if = packet->tcpip_if;
parsed_packet->ip_protocol = packet->ip_protocol;
parsed_packet->multicast = packet->multicast;
parsed_packet->authoritative = (header.flags == MDNS_FLAGS_QR_AUTHORITATIVE);
parsed_packet->distributed = header.flags == MDNS_FLAGS_DISTRIBUTED;
parsed_packet->id = header.id;
esp_netif_ip_addr_copy(&parsed_packet->src, &packet->src);
parsed_packet->src_port = packet->src_port;
parsed_packet->records = NULL;
if (header.questions) {
uint8_t qs = header.questions;
while (qs--) {
content = _mdns_parse_fqdn(data, content, name, len);
if (!content) {
header.answers = 0;
header.additional = 0;
header.servers = 0;
goto clear_rx_packet;
}{...}
if (content + MDNS_CLASS_OFFSET + 1 >= data + len) {
goto clear_rx_packet;
}{...}
uint16_t type = _mdns_read_u16(content, MDNS_TYPE_OFFSET);
uint16_t mdns_class = _mdns_read_u16(content, MDNS_CLASS_OFFSET);
bool unicast = !!(mdns_class & 0x8000);
mdns_class &= 0x7FFF;
content = content + 4;
if (mdns_class != 0x0001 || name->invalid) {
continue;
}{...}
if (_mdns_name_is_discovery(name, type)) {
parsed_packet->discovery = true;
mdns_srv_item_t *a = _mdns_server->services;
while (a) {
mdns_parsed_question_t *question = (mdns_parsed_question_t *)mdns_mem_calloc(1, sizeof(mdns_parsed_question_t));
if (!question) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
question->next = parsed_packet->questions;
parsed_packet->questions = question;
question->unicast = unicast;
question->type = MDNS_TYPE_SDPTR;
question->host = NULL;
question->service = mdns_mem_strdup(a->service->service);
question->proto = mdns_mem_strdup(a->service->proto);
question->domain = mdns_mem_strdup(MDNS_DEFAULT_DOMAIN);
if (!question->service || !question->proto || !question->domain) {
goto clear_rx_packet;
}{...}
a = a->next;
}{...}
continue;
}{...}
if (!_mdns_name_is_ours(name)) {
continue;
}{...}
if (type == MDNS_TYPE_ANY && !_str_null_or_empty(name->host)) {
parsed_packet->probe = true;
}{...}
mdns_parsed_question_t *question = (mdns_parsed_question_t *)mdns_mem_calloc(1, sizeof(mdns_parsed_question_t));
if (!question) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
question->next = parsed_packet->questions;
parsed_packet->questions = question;
question->unicast = unicast;
question->type = type;
question->sub = name->sub;
if (_mdns_strdup_check(&(question->host), name->host)
|| _mdns_strdup_check(&(question->service), name->service)
|| _mdns_strdup_check(&(question->proto), name->proto)
|| _mdns_strdup_check(&(question->domain), name->domain)) {
goto clear_rx_packet;
}{...}
}{...}
}{...}
if (header.questions && !parsed_packet->questions && !parsed_packet->discovery && !header.answers) {
goto clear_rx_packet;
}{...} else if (header.answers || header.servers || header.additional) {
uint16_t recordIndex = 0;
while (content < (data + len)) {
content = _mdns_parse_fqdn(data, content, name, len);
if (!content) {
goto clear_rx_packet;
}{...}
if (content + MDNS_LEN_OFFSET + 1 >= data + len) {
goto clear_rx_packet;
}{...}
uint16_t type = _mdns_read_u16(content, MDNS_TYPE_OFFSET);
uint16_t mdns_class = _mdns_read_u16(content, MDNS_CLASS_OFFSET);
uint32_t ttl = _mdns_read_u32(content, MDNS_TTL_OFFSET);
uint16_t data_len = _mdns_read_u16(content, MDNS_LEN_OFFSET);
const uint8_t *data_ptr = content + MDNS_DATA_OFFSET;
mdns_class &= 0x7FFF;
content = data_ptr + data_len;
if (content > (data + len) || data_len == 0) {
goto clear_rx_packet;
}{...}
bool discovery = false;
bool ours = false;
mdns_srv_item_t *service = NULL;
mdns_parsed_record_type_t record_type = MDNS_ANSWER;
if (recordIndex >= (header.answers + header.servers)) {
record_type = MDNS_EXTRA;
}{...} else if (recordIndex >= (header.answers)) {
record_type = MDNS_NS;
}{...}
recordIndex++;
if (type == MDNS_TYPE_NSEC || type == MDNS_TYPE_OPT) {
continue;
}{...}
if (parsed_packet->discovery && _mdns_name_is_discovery(name, type)) {
discovery = true;
}{...} else if (!name->sub && _mdns_name_is_ours(name)) {
ours = true;
if (name->service[0] && name->proto[0]) {
service = _mdns_get_service_item(name->service, name->proto, NULL);
}{...}
}{...} else {
if ((header.flags & MDNS_FLAGS_QUERY_REPSONSE) == 0 || record_type == MDNS_NS) {
continue;
}{...}
search_result = _mdns_search_find_from(_mdns_server->search_once, name, type, packet->tcpip_if, packet->ip_protocol);
browse_result = _mdns_browse_find_from(_mdns_server->browse, name, type, packet->tcpip_if, packet->ip_protocol);
if (browse_result) {
if (!out_sync_browse) {
out_sync_browse = (mdns_browse_sync_t *)mdns_mem_malloc(sizeof(mdns_browse_sync_t));
if (!out_sync_browse) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
out_sync_browse->browse = browse_result;
out_sync_browse->sync_result = NULL;
}{...}
if (!browse_result_service) {
browse_result_service = (char *)mdns_mem_malloc(MDNS_NAME_BUF_LEN);
if (!browse_result_service) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
}{...}
memcpy(browse_result_service, browse_result->service, MDNS_NAME_BUF_LEN);
if (!browse_result_proto) {
browse_result_proto = (char *)mdns_mem_malloc(MDNS_NAME_BUF_LEN);
if (!browse_result_proto) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
}{...}
memcpy(browse_result_proto, browse_result->proto, MDNS_NAME_BUF_LEN);
if (type == MDNS_TYPE_SRV || type == MDNS_TYPE_TXT) {
if (!browse_result_instance) {
browse_result_instance = (char *)mdns_mem_malloc(MDNS_NAME_BUF_LEN);
if (!browse_result_instance) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
}{...}
memcpy(browse_result_instance, name->host, MDNS_NAME_BUF_LEN);
}{...}
}{...}
}{...}
if (type == MDNS_TYPE_PTR) {
if (!_mdns_parse_fqdn(data, data_ptr, name, len)) {
continue;
}{...}
if (search_result) {
_mdns_search_result_add_ptr(search_result, name->host, name->service, name->proto,
packet->tcpip_if, packet->ip_protocol, ttl);
}{...} else if ((discovery || ours) && !name->sub && _mdns_name_is_ours(name)) {
if (name->host[0]) {
service = _mdns_get_service_item_instance(name->host, name->service, name->proto, NULL);
}{...} else {
service = _mdns_get_service_item(name->service, name->proto, NULL);
}{...}
if (discovery && service) {
_mdns_remove_parsed_question(parsed_packet, MDNS_TYPE_SDPTR, service);
}{...} else if (service && parsed_packet->questions && !parsed_packet->probe) {
_mdns_remove_parsed_question(parsed_packet, type, service);
}{...} else if (service) {
if (ttl > (MDNS_ANSWER_PTR_TTL / 2)) {
_mdns_remove_scheduled_answer(packet->tcpip_if, packet->ip_protocol, type, service);
}{...}
}{...}
if (service) {
mdns_parsed_record_t *record = mdns_mem_malloc(sizeof(mdns_parsed_record_t));
if (!record) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
record->next = parsed_packet->records;
parsed_packet->records = record;
record->type = MDNS_TYPE_PTR;
record->record_type = MDNS_ANSWER;
record->ttl = ttl;
record->host = NULL;
record->service = NULL;
record->proto = NULL;
if (name->host[0]) {
record->host = mdns_mem_malloc(MDNS_NAME_BUF_LEN);
if (!record->host) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
memcpy(record->host, name->host, MDNS_NAME_BUF_LEN);
}{...}
if (name->service[0]) {
record->service = mdns_mem_malloc(MDNS_NAME_BUF_LEN);
if (!record->service) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
memcpy(record->service, name->service, MDNS_NAME_BUF_LEN);
}{...}
if (name->proto[0]) {
record->proto = mdns_mem_malloc(MDNS_NAME_BUF_LEN);
if (!record->proto) {
HOOK_MALLOC_FAILED;
goto clear_rx_packet;
}{...}
memcpy(record->proto, name->proto, MDNS_NAME_BUF_LEN);
}{...}
}{...}
}{...}
}{...} else if (type == MDNS_TYPE_SRV) {
mdns_result_t *result = NULL;
if (search_result && search_result->type == MDNS_TYPE_PTR) {
result = search_result->result;
while (result) {
if (_mdns_get_esp_netif(packet->tcpip_if) == result->esp_netif
&& packet->ip_protocol == result->ip_protocol
&& result->instance_name && !strcmp(name->host, result->instance_name)) {
break;
}{...}
result = result->next;
}{...}
if (!result) {
result = _mdns_search_result_add_ptr(search_result, name->host, name->service, name->proto,
packet->tcpip_if, packet->ip_protocol, ttl);
if (!result) {
continue;
}{...}
}{...}
}{...}
bool is_selfhosted = _mdns_name_is_selfhosted(name);
if (!_mdns_parse_fqdn(data, data_ptr + MDNS_SRV_FQDN_OFFSET, name, len)) {
continue;
}{...}
if (data_ptr + MDNS_SRV_PORT_OFFSET + 1 >= data + len) {
goto clear_rx_packet;
}{...}
uint16_t priority = _mdns_read_u16(data_ptr, MDNS_SRV_PRIORITY_OFFSET);
uint16_t weight = _mdns_read_u16(data_ptr, MDNS_SRV_WEIGHT_OFFSET);
uint16_t port = _mdns_read_u16(data_ptr, MDNS_SRV_PORT_OFFSET);
if (browse_result) {
_mdns_browse_result_add_srv(browse_result, name->host, browse_result_instance, browse_result_service,
browse_result_proto, port, packet->tcpip_if, packet->ip_protocol, ttl, out_sync_browse);
}{...}
if (search_result) {
if (search_result->type == MDNS_TYPE_PTR) {
if (!result->hostname) {
result->port = port;
result->hostname = mdns_mem_strdup(name->host);
}{...}
}{...} else {
_mdns_search_result_add_srv(search_result, name->host, port, packet->tcpip_if, packet->ip_protocol, ttl);
}{...}
}{...} else if (ours) {
if (parsed_packet->questions && !parsed_packet->probe) {
_mdns_remove_parsed_question(parsed_packet, type, service);
continue;
}{...} else if (parsed_packet->distributed) {
_mdns_remove_scheduled_answer(packet->tcpip_if, packet->ip_protocol, type, service);
continue;
}{...}
if (!is_selfhosted) {
continue;
}{...}
int col = 0;
if (mdns_class > 1) {
col = 1;
}{...} else if (!mdns_class) {
col = -1;
}{...} else if (service) {
col = _mdns_check_srv_collision(service->service, priority, weight, port, name->host, name->domain);
}{...}
if (service && col && (parsed_packet->probe || parsed_packet->authoritative)) {
if (col > 0 || !port) {
do_not_reply = true;
if (_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].probe_running) {
_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].failed_probes++;
if (!_str_null_or_empty(service->service->instance)) {
char *new_instance = _mdns_mangle_name((char *)service->service->instance);
if (new_instance) {
mdns_mem_free((char *)service->service->instance);
service->service->instance = new_instance;
}{...}
_mdns_probe_all_pcbs(&service, 1, false, false);
}{...} else if (!_str_null_or_empty(_mdns_server->instance)) {
char *new_instance = _mdns_mangle_name((char *)_mdns_server->instance);
if (new_instance) {
mdns_mem_free((char *)_mdns_server->instance);
_mdns_server->instance = new_instance;
}{...}
_mdns_restart_all_pcbs_no_instance();
}{...} else {
char *new_host = _mdns_mangle_name((char *)_mdns_server->hostname);
if (new_host) {
_mdns_remap_self_service_hostname(_mdns_server->hostname, new_host);
mdns_mem_free((char *)_mdns_server->hostname);
_mdns_server->hostname = new_host;
_mdns_self_host.hostname = new_host;
}{...}
_mdns_restart_all_pcbs();
}{...}
}{...} else if (service) {
_mdns_pcb_send_bye(packet->tcpip_if, packet->ip_protocol, &service, 1, false);
_mdns_init_pcb_probe(packet->tcpip_if, packet->ip_protocol, &service, 1, false);
}{...}
}{...}
}{...} else if (ttl > 60 && !col && !parsed_packet->authoritative && !parsed_packet->probe && !parsed_packet->questions) {
_mdns_remove_scheduled_answer(packet->tcpip_if, packet->ip_protocol, type, service);
}{...}
}{...}
}{...} else if (type == MDNS_TYPE_TXT) {
mdns_txt_item_t *txt = NULL;
uint8_t *txt_value_len = NULL;
size_t txt_count = 0;
mdns_result_t *result = NULL;
if (browse_result) {
_mdns_result_txt_create(data_ptr, data_len, &txt, &txt_value_len, &txt_count);
_mdns_browse_result_add_txt(browse_result, browse_result_instance, browse_result_service, browse_result_proto,
txt, txt_value_len, txt_count, packet->tcpip_if, packet->ip_protocol, ttl, out_sync_browse);
}{...}
if (search_result) {
if (search_result->type == MDNS_TYPE_PTR) {
result = search_result->result;
while (result) {
if (_mdns_get_esp_netif(packet->tcpip_if) == result->esp_netif
&& packet->ip_protocol == result->ip_protocol
&& result->instance_name && !strcmp(name->host, result->instance_name)) {
break;
}{...}
result = result->next;
}{...}
if (!result) {
result = _mdns_search_result_add_ptr(search_result, name->host, name->service, name->proto,
packet->tcpip_if, packet->ip_protocol, ttl);
if (!result) {
continue;
}{...}
}{...}
if (!result->txt) {
_mdns_result_txt_create(data_ptr, data_len, &txt, &txt_value_len, &txt_count);
if (txt_count) {
result->txt = txt;
result->txt_count = txt_count;
result->txt_value_len = txt_value_len;
}{...}
}{...}
}{...} else {
_mdns_result_txt_create(data_ptr, data_len, &txt, &txt_value_len, &txt_count);
if (txt_count) {
_mdns_search_result_add_txt(search_result, txt, txt_value_len, txt_count, packet->tcpip_if, packet->ip_protocol, ttl);
}{...}
}{...}
}{...} else if (ours) {
if (parsed_packet->questions && !parsed_packet->probe && service) {
_mdns_remove_parsed_question(parsed_packet, type, service);
continue;
}{...}
if (!_mdns_name_is_selfhosted(name)) {
continue;
}{...}
int col = 0;
if (mdns_class > 1) {
col = 1;
}{...} else if (!mdns_class) {
col = -1;
}{...} else if (service) {
col = _mdns_check_txt_collision(service->service, data_ptr, data_len);
}{...}
if (col && !_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].probe_running && service) {
do_not_reply = true;
_mdns_init_pcb_probe(packet->tcpip_if, packet->ip_protocol, &service, 1, true);
}{...} else if (ttl > (MDNS_ANSWER_TXT_TTL / 2) && !col && !parsed_packet->authoritative && !parsed_packet->probe && !parsed_packet->questions && !_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].probe_running) {
_mdns_remove_scheduled_answer(packet->tcpip_if, packet->ip_protocol, type, service);
}{...}
}{...}
}{...}
#ifdef CONFIG_LWIP_IPV6
else if (type == MDNS_TYPE_AAAA) {
esp_ip_addr_t ip6;
ip6.type = ESP_IPADDR_TYPE_V6;
memcpy(ip6.u_addr.ip6.addr, data_ptr, MDNS_ANSWER_AAAA_SIZE);
if (browse_result) {
_mdns_browse_result_add_ip(browse_result, name->host, &ip6, packet->tcpip_if, packet->ip_protocol, ttl, out_sync_browse);
}{...}
if (search_result) {
while (search_result) {
_mdns_search_result_add_ip(search_result, name->host, &ip6, packet->tcpip_if, packet->ip_protocol, ttl);
search_result = _mdns_search_find_from(search_result->next, name, type, packet->tcpip_if, packet->ip_protocol);
}{...}
}{...} else if (ours) {
if (parsed_packet->questions && !parsed_packet->probe) {
_mdns_remove_parsed_question(parsed_packet, type, NULL);
continue;
}{...}
if (!_mdns_name_is_selfhosted(name)) {
continue;
}{...}
int col = 0;
if (mdns_class > 1) {
col = 1;
}{...} else if (!mdns_class) {
col = -1;
}{...} else {
col = _mdns_check_aaaa_collision(&(ip6.u_addr.ip6), packet->tcpip_if);
}{...}
if (col == 2) {
goto clear_rx_packet;
}{...} else if (col == 1) {
do_not_reply = true;
if (_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].probe_running) {
if (col && (parsed_packet->probe || parsed_packet->authoritative)) {
_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].failed_probes++;
char *new_host = _mdns_mangle_name((char *)_mdns_server->hostname);
if (new_host) {
_mdns_remap_self_service_hostname(_mdns_server->hostname, new_host);
mdns_mem_free((char *)_mdns_server->hostname);
_mdns_server->hostname = new_host;
_mdns_self_host.hostname = new_host;
}{...}
_mdns_restart_all_pcbs();
}{...}
}{...} else {
_mdns_init_pcb_probe(packet->tcpip_if, packet->ip_protocol, NULL, 0, true);
}{...}
}{...} else if (ttl > 60 && !col && !parsed_packet->authoritative && !parsed_packet->probe && !parsed_packet->questions && !_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].probe_running) {
_mdns_remove_scheduled_answer(packet->tcpip_if, packet->ip_protocol, type, NULL);
}{...}
}{...}
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV4
else if (type == MDNS_TYPE_A) {
esp_ip_addr_t ip;
ip.type = ESP_IPADDR_TYPE_V4;
memcpy(&(ip.u_addr.ip4.addr), data_ptr, 4);
if (browse_result) {
_mdns_browse_result_add_ip(browse_result, name->host, &ip, packet->tcpip_if, packet->ip_protocol, ttl, out_sync_browse);
}{...}
if (search_result) {
while (search_result) {
_mdns_search_result_add_ip(search_result, name->host, &ip, packet->tcpip_if, packet->ip_protocol, ttl);
search_result = _mdns_search_find_from(search_result->next, name, type, packet->tcpip_if, packet->ip_protocol);
}{...}
}{...} else if (ours) {
if (parsed_packet->questions && !parsed_packet->probe) {
_mdns_remove_parsed_question(parsed_packet, type, NULL);
continue;
}{...}
if (!_mdns_name_is_selfhosted(name)) {
continue;
}{...}
int col = 0;
if (mdns_class > 1) {
col = 1;
}{...} else if (!mdns_class) {
col = -1;
}{...} else {
col = _mdns_check_a_collision(&(ip.u_addr.ip4), packet->tcpip_if);
}{...}
if (col == 2) {
goto clear_rx_packet;
}{...} else if (col == 1) {
do_not_reply = true;
if (_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].probe_running) {
if (col && (parsed_packet->probe || parsed_packet->authoritative)) {
_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].failed_probes++;
char *new_host = _mdns_mangle_name((char *)_mdns_server->hostname);
if (new_host) {
_mdns_remap_self_service_hostname(_mdns_server->hostname, new_host);
mdns_mem_free((char *)_mdns_server->hostname);
_mdns_server->hostname = new_host;
_mdns_self_host.hostname = new_host;
}{...}
_mdns_restart_all_pcbs();
}{...}
}{...} else {
_mdns_init_pcb_probe(packet->tcpip_if, packet->ip_protocol, NULL, 0, true);
}{...}
}{...} else if (ttl > 60 && !col && !parsed_packet->authoritative && !parsed_packet->probe && !parsed_packet->questions && !_mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].probe_running) {
_mdns_remove_scheduled_answer(packet->tcpip_if, packet->ip_protocol, type, NULL);
}{...}
}{...}
}{...}
#endif/* ... */
}{...}
if (parsed_packet->authoritative) {
_mdns_search_finish_done();
}{...}
}{...}
if (!do_not_reply && _mdns_server->interfaces[packet->tcpip_if].pcbs[packet->ip_protocol].state > PCB_PROBE_3 && (parsed_packet->questions || parsed_packet->discovery)) {
_mdns_create_answer_from_parsed_packet(parsed_packet);
}{...}
if (out_sync_browse) {
#ifdef MDNS_ENABLE_DEBUG
_mdns_dbg_printf("Browse %s%s total result:", out_sync_browse->browse->service, out_sync_browse->browse->proto);
debug_printf_browse_result_all(out_sync_browse->browse->result);/* ... */
#endif
if (out_sync_browse->sync_result) {
#ifdef MDNS_ENABLE_DEBUG
_mdns_dbg_printf("Changed result:");
debug_printf_browse_result_all(out_sync_browse->sync_result->result);/* ... */
#endif
_mdns_sync_browse_action(ACTION_BROWSE_SYNC, out_sync_browse);
}{...} else {
mdns_mem_free(out_sync_browse);
}{...}
out_sync_browse = NULL;
}{...}
clear_rx_packet:
while (parsed_packet->questions) {
mdns_parsed_question_t *question = parsed_packet->questions;
parsed_packet->questions = parsed_packet->questions->next;
if (question->host) {
mdns_mem_free(question->host);
}{...}
if (question->service) {
mdns_mem_free(question->service);
}{...}
if (question->proto) {
mdns_mem_free(question->proto);
}{...}
if (question->domain) {
mdns_mem_free(question->domain);
}{...}
mdns_mem_free(question);
}{...}
while (parsed_packet->records) {
mdns_parsed_record_t *record = parsed_packet->records;
parsed_packet->records = parsed_packet->records->next;
if (record->host) {
mdns_mem_free(record->host);
}{...}
if (record->service) {
mdns_mem_free(record->service);
}{...}
if (record->proto) {
mdns_mem_free(record->proto);
}{...}
record->next = NULL;
mdns_mem_free(record);
}{...}
mdns_mem_free(parsed_packet);
mdns_mem_free(browse_result_instance);
mdns_mem_free(browse_result_service);
mdns_mem_free(browse_result_proto);
mdns_mem_free(out_sync_browse);
}{ ... }
/* ... */
void _mdns_enable_pcb(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
if (!mdns_is_netif_ready(tcpip_if, ip_protocol)) {
if (_mdns_pcb_init(tcpip_if, ip_protocol)) {
_mdns_server->interfaces[tcpip_if].pcbs[ip_protocol].failed_probes = 0;
return;
}{...}
}{...}
_mdns_restart_pcb(tcpip_if, ip_protocol);
}{ ... }
/* ... */
void _mdns_disable_pcb(mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
_mdns_clean_netif_ptr(tcpip_if);
if (mdns_is_netif_ready(tcpip_if, ip_protocol)) {
_mdns_clear_pcb_tx_queue_head(tcpip_if, ip_protocol);
mdns_pcb_deinit_local(tcpip_if, ip_protocol);
mdns_if_t other_if = _mdns_get_other_if(tcpip_if);
if (other_if != MDNS_MAX_INTERFACES && _mdns_server->interfaces[other_if].pcbs[ip_protocol].state == PCB_DUP) {
_mdns_server->interfaces[other_if].pcbs[ip_protocol].state = PCB_OFF;
_mdns_enable_pcb(other_if, ip_protocol);
}{...}
}{...}
_mdns_server->interfaces[tcpip_if].pcbs[ip_protocol].state = PCB_OFF;
}{ ... }
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
static inline char nibble_to_hex(int var)
{
return var > 9 ? var - 10 + 'a' : var + '0';
}{...}
/* ... */#endif
/* ... */
static void perform_event_action(mdns_if_t mdns_if, mdns_event_actions_t action)
{
if (!_mdns_server || mdns_if >= MDNS_MAX_INTERFACES) {
return;
}{...}
if (action & MDNS_EVENT_ENABLE_IP4) {
_mdns_enable_pcb(mdns_if, MDNS_IP_PROTOCOL_V4);
}{...}
if (action & MDNS_EVENT_ENABLE_IP6) {
_mdns_enable_pcb(mdns_if, MDNS_IP_PROTOCOL_V6);
}{...}
if (action & MDNS_EVENT_DISABLE_IP4) {
_mdns_disable_pcb(mdns_if, MDNS_IP_PROTOCOL_V4);
}{...}
if (action & MDNS_EVENT_DISABLE_IP6) {
_mdns_disable_pcb(mdns_if, MDNS_IP_PROTOCOL_V6);
}{...}
if (action & MDNS_EVENT_ANNOUNCE_IP4) {
_mdns_announce_pcb(mdns_if, MDNS_IP_PROTOCOL_V4, NULL, 0, true);
}{...}
if (action & MDNS_EVENT_ANNOUNCE_IP6) {
_mdns_announce_pcb(mdns_if, MDNS_IP_PROTOCOL_V6, NULL, 0, true);
}{...}
#ifdef CONFIG_MDNS_RESPOND_REVERSE_QUERIES
#ifdef CONFIG_LWIP_IPV4
if (action & MDNS_EVENT_IP4_REVERSE_LOOKUP) {
esp_netif_ip_info_t if_ip_info;
if (esp_netif_get_ip_info(_mdns_get_esp_netif(mdns_if), &if_ip_info) == ESP_OK) {
esp_ip4_addr_t *ip = &if_ip_info.ip;
char *reverse_query_name = NULL;
if (asprintf(&reverse_query_name, "%d.%d.%d.%d.in-addr",
esp_ip4_addr4_16(ip), esp_ip4_addr3_16(ip),
esp_ip4_addr2_16(ip), esp_ip4_addr1_16(ip)) > 0 && reverse_query_name) {
ESP_LOGD(TAG, "Registered reverse query: %s.arpa", reverse_query_name);
_mdns_delegate_hostname_add(reverse_query_name, NULL);
}{...}
}{...}
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (action & MDNS_EVENT_IP6_REVERSE_LOOKUP) {
esp_ip6_addr_t addr6;
if (!esp_netif_get_ip6_linklocal(_mdns_get_esp_netif(mdns_if), &addr6) && !_ipv6_address_is_zero(addr6)) {
uint8_t *paddr = (uint8_t *)&addr6.addr;
const char sub[] = "ip6";
const size_t query_name_size = 4 * sizeof(addr6.addr) + sizeof(sub);
char *reverse_query_name = mdns_mem_malloc(query_name_size);
if (reverse_query_name) {
char *ptr = &reverse_query_name[query_name_size];
memcpy(ptr - sizeof(sub), sub, sizeof(sub));
ptr -= sizeof(sub) + 1;
while (reverse_query_name < ptr) {
*ptr-- = '.';
*ptr-- = nibble_to_hex(((*paddr) >> 4) & 0x0F);
*ptr-- = '.';
*ptr-- = nibble_to_hex((*paddr) & 0x0F);
paddr++;
}{...}
ESP_LOGD(TAG, "Registered reverse query: %s.arpa", reverse_query_name);
_mdns_delegate_hostname_add(reverse_query_name, NULL);
}{...}
}{...}
}{...}
#endif/* ... */ /* ... */
#endif
}{ ... }
/* ... */
static inline void post_mdns_disable_pcb(mdns_predef_if_t preset_if, mdns_ip_protocol_t protocol)
{
mdns_post_custom_action_tcpip_if(mdns_if_from_preset_if(preset_if), protocol == MDNS_IP_PROTOCOL_V4 ? MDNS_EVENT_DISABLE_IP4 : MDNS_EVENT_DISABLE_IP6);
}{ ... }
static inline void post_mdns_enable_pcb(mdns_predef_if_t preset_if, mdns_ip_protocol_t protocol)
{
mdns_post_custom_action_tcpip_if(mdns_if_from_preset_if(preset_if), protocol == MDNS_IP_PROTOCOL_V4 ? MDNS_EVENT_ENABLE_IP4 : MDNS_EVENT_ENABLE_IP6);
}{ ... }
static inline void post_mdns_announce_pcb(mdns_predef_if_t preset_if, mdns_ip_protocol_t protocol)
{
mdns_post_custom_action_tcpip_if(mdns_if_from_preset_if(preset_if), protocol == MDNS_IP_PROTOCOL_V4 ? MDNS_EVENT_ANNOUNCE_IP4 : MDNS_EVENT_ANNOUNCE_IP6);
}{ ... }
#if CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP || CONFIG_MDNS_PREDEF_NETIF_ETH
void mdns_preset_if_handle_system_event(void *arg, esp_event_base_t event_base,
int32_t event_id, void *event_data)
{
if (!_mdns_server) {
return;
}{...}
esp_netif_dhcp_status_t dcst;
#if MDNS_ESP_WIFI_ENABLED && (CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP)
if (event_base == WIFI_EVENT) {
switch (event_id) {
case WIFI_EVENT_STA_CONNECTED:
if (!esp_netif_dhcpc_get_status(esp_netif_from_preset_if(MDNS_IF_STA), &dcst)) {
if (dcst == ESP_NETIF_DHCP_STOPPED) {
post_mdns_enable_pcb(MDNS_IF_STA, MDNS_IP_PROTOCOL_V4);
}{...}
}{...}
break;...
case WIFI_EVENT_STA_DISCONNECTED:
post_mdns_disable_pcb(MDNS_IF_STA, MDNS_IP_PROTOCOL_V4);
post_mdns_disable_pcb(MDNS_IF_STA, MDNS_IP_PROTOCOL_V6);
break;...
case WIFI_EVENT_AP_START:
post_mdns_enable_pcb(MDNS_IF_AP, MDNS_IP_PROTOCOL_V4);
break;...
case WIFI_EVENT_AP_STOP:
post_mdns_disable_pcb(MDNS_IF_AP, MDNS_IP_PROTOCOL_V4);
post_mdns_disable_pcb(MDNS_IF_AP, MDNS_IP_PROTOCOL_V6);
break;...
default:
break;...
}{...}
}{...} else/* ... */
#endif
#if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH
if (event_base == ETH_EVENT) {
switch (event_id) {
case ETHERNET_EVENT_CONNECTED:
if (!esp_netif_dhcpc_get_status(esp_netif_from_preset_if(MDNS_IF_ETH), &dcst)) {
if (dcst == ESP_NETIF_DHCP_STOPPED) {
post_mdns_enable_pcb(MDNS_IF_ETH, MDNS_IP_PROTOCOL_V4);
}{...}
}{...}
break;...
case ETHERNET_EVENT_DISCONNECTED:
post_mdns_disable_pcb(MDNS_IF_ETH, MDNS_IP_PROTOCOL_V4);
post_mdns_disable_pcb(MDNS_IF_ETH, MDNS_IP_PROTOCOL_V6);
break;...
default:
break;...
}{...}
}{...} else/* ... */
#endif
if (event_base == IP_EVENT) {
switch (event_id) {
case IP_EVENT_STA_GOT_IP:
post_mdns_enable_pcb(MDNS_IF_STA, MDNS_IP_PROTOCOL_V4);
post_mdns_announce_pcb(MDNS_IF_STA, MDNS_IP_PROTOCOL_V6);
break;
#if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH...
case IP_EVENT_ETH_GOT_IP:
post_mdns_enable_pcb(MDNS_IF_ETH, MDNS_IP_PROTOCOL_V4);
break;/* ... */
#endif
case IP_EVENT_GOT_IP6: {
ip_event_got_ip6_t *event = (ip_event_got_ip6_t *) event_data;
mdns_if_t mdns_if = _mdns_get_if_from_esp_netif(event->esp_netif);
if (mdns_if >= MDNS_MAX_INTERFACES) {
return;
}{...}
post_mdns_enable_pcb(mdns_if, MDNS_IP_PROTOCOL_V6);
post_mdns_announce_pcb(mdns_if, MDNS_IP_PROTOCOL_V4);
mdns_browse_t *browse = _mdns_server->browse;
while (browse) {
_mdns_browse_send(browse, mdns_if);
browse = browse->next;
}{...}
}{...}
break;...
default:
break;...
}{...}
}{...}
}{ ... }
/* ... */#endif
/* ... */
/* ... */
static void _mdns_search_free(mdns_search_once_t *search)
{
mdns_mem_free(search->instance);
mdns_mem_free(search->service);
mdns_mem_free(search->proto);
vSemaphoreDelete(search->done_semaphore);
mdns_mem_free(search);
}{ ... }
/* ... */
static mdns_search_once_t *_mdns_search_init(const char *name, const char *service, const char *proto, uint16_t type, bool unicast,
uint32_t timeout, uint8_t max_results, mdns_query_notify_t notifier)
{
mdns_search_once_t *search = (mdns_search_once_t *)mdns_mem_malloc(sizeof(mdns_search_once_t));
if (!search) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
memset(search, 0, sizeof(mdns_search_once_t));
search->done_semaphore = xSemaphoreCreateBinary();
if (!search->done_semaphore) {
mdns_mem_free(search);
return NULL;
}{...}
if (!_str_null_or_empty(name)) {
search->instance = mdns_mem_strndup(name, MDNS_NAME_BUF_LEN - 1);
if (!search->instance) {
_mdns_search_free(search);
return NULL;
}{...}
}{...}
if (!_str_null_or_empty(service)) {
search->service = mdns_mem_strndup(service, MDNS_NAME_BUF_LEN - 1);
if (!search->service) {
_mdns_search_free(search);
return NULL;
}{...}
}{...}
if (!_str_null_or_empty(proto)) {
search->proto = mdns_mem_strndup(proto, MDNS_NAME_BUF_LEN - 1);
if (!search->proto) {
_mdns_search_free(search);
return NULL;
}{...}
}{...}
search->type = type;
search->unicast = unicast;
search->timeout = timeout;
search->num_results = 0;
search->max_results = max_results;
search->result = NULL;
search->state = SEARCH_INIT;
search->sent_at = 0;
search->started_at = xTaskGetTickCount() * portTICK_PERIOD_MS;
search->notifier = notifier;
search->next = NULL;
return search;
}{ ... }
/* ... */
static void _mdns_search_finish(mdns_search_once_t *search)
{
search->state = SEARCH_OFF;
queueDetach(mdns_search_once_t, _mdns_server->search_once, search);
if (search->notifier) {
search->notifier(search);
}{...}
xSemaphoreGive(search->done_semaphore);
}{ ... }
/* ... */
static void _mdns_search_add(mdns_search_once_t *search)
{
search->next = _mdns_server->search_once;
_mdns_server->search_once = search;
}{ ... }
/* ... */
static void _mdns_search_finish_done(void)
{
mdns_search_once_t *search = _mdns_server->search_once;
mdns_search_once_t *s = NULL;
while (search) {
s = search;
search = search->next;
if (s->max_results && s->num_results >= s->max_results) {
_mdns_search_finish(s);
}{...}
}{...}
}{ ... }
/* ... */
static mdns_ip_addr_t *_mdns_result_addr_create_ip(esp_ip_addr_t *ip)
{
mdns_ip_addr_t *a = (mdns_ip_addr_t *)mdns_mem_malloc(sizeof(mdns_ip_addr_t));
if (!a) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
memset(a, 0, sizeof(mdns_ip_addr_t));
a->addr.type = ip->type;
if (ip->type == ESP_IPADDR_TYPE_V6) {
memcpy(a->addr.u_addr.ip6.addr, ip->u_addr.ip6.addr, 16);
}{...} else {
a->addr.u_addr.ip4.addr = ip->u_addr.ip4.addr;
}{...}
return a;
}{ ... }
static inline void _mdns_result_update_ttl(mdns_result_t *r, uint32_t ttl)
{
r->ttl = r->ttl < ttl ? r->ttl : ttl;
}{ ... }
/* ... */
static void _mdns_result_add_ip(mdns_result_t *r, esp_ip_addr_t *ip)
{
mdns_ip_addr_t *a = r->addr;
while (a) {
if (a->addr.type == ip->type) {
#ifdef CONFIG_LWIP_IPV4
if (a->addr.type == ESP_IPADDR_TYPE_V4 && a->addr.u_addr.ip4.addr == ip->u_addr.ip4.addr) {
return;
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (a->addr.type == ESP_IPADDR_TYPE_V6 && !memcmp(a->addr.u_addr.ip6.addr, ip->u_addr.ip6.addr, 16)) {
return;
}{...}
#endif/* ... */
}{...}
a = a->next;
}{...}
a = _mdns_result_addr_create_ip(ip);
if (!a) {
return;
}{...}
a->next = r->addr;
r->addr = a;
}{ ... }
/* ... */
static void _mdns_search_result_add_ip(mdns_search_once_t *search, const char *hostname, esp_ip_addr_t *ip,
mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl)
{
mdns_result_t *r = NULL;
mdns_ip_addr_t *a = NULL;
if ((search->type == MDNS_TYPE_A && ip->type == ESP_IPADDR_TYPE_V4)
|| (search->type == MDNS_TYPE_AAAA && ip->type == ESP_IPADDR_TYPE_V6)
|| search->type == MDNS_TYPE_ANY) {
r = search->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol) {
_mdns_result_add_ip(r, ip);
_mdns_result_update_ttl(r, ttl);
return;
}{...}
r = r->next;
}{...}
if (!search->max_results || search->num_results < search->max_results) {
r = (mdns_result_t *)mdns_mem_malloc(sizeof(mdns_result_t));
if (!r) {
HOOK_MALLOC_FAILED;
return;
}{...}
memset(r, 0, sizeof(mdns_result_t));
a = _mdns_result_addr_create_ip(ip);
if (!a) {
mdns_mem_free(r);
return;
}{...}
a->next = r->addr;
r->hostname = mdns_mem_strdup(hostname);
r->addr = a;
r->esp_netif = _mdns_get_esp_netif(tcpip_if);
r->ip_protocol = ip_protocol;
r->next = search->result;
r->ttl = ttl;
search->result = r;
search->num_results++;
}{...}
}{...} else if (search->type == MDNS_TYPE_PTR || search->type == MDNS_TYPE_SRV) {
r = search->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol && !_str_null_or_empty(r->hostname) && !strcasecmp(hostname, r->hostname)) {
_mdns_result_add_ip(r, ip);
_mdns_result_update_ttl(r, ttl);
break;
}{...}
r = r->next;
}{...}
}{...}
}{ ... }
/* ... */
static mdns_result_t *_mdns_search_result_add_ptr(mdns_search_once_t *search, const char *instance,
const char *service_type, const char *proto, mdns_if_t tcpip_if,
mdns_ip_protocol_t ip_protocol, uint32_t ttl)
{
mdns_result_t *r = search->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol && !_str_null_or_empty(r->instance_name) && !strcasecmp(instance, r->instance_name)) {
_mdns_result_update_ttl(r, ttl);
return r;
}{...}
r = r->next;
}{...}
if (!search->max_results || search->num_results < search->max_results) {
r = (mdns_result_t *)mdns_mem_malloc(sizeof(mdns_result_t));
if (!r) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
memset(r, 0, sizeof(mdns_result_t));
r->instance_name = mdns_mem_strdup(instance);
r->service_type = mdns_mem_strdup(service_type);
r->proto = mdns_mem_strdup(proto);
if (!r->instance_name) {
mdns_mem_free(r);
return NULL;
}{...}
r->esp_netif = _mdns_get_esp_netif(tcpip_if);
r->ip_protocol = ip_protocol;
r->ttl = ttl;
r->next = search->result;
search->result = r;
search->num_results++;
return r;
}{...}
return NULL;
}{ ... }
/* ... */
static void _mdns_search_result_add_srv(mdns_search_once_t *search, const char *hostname, uint16_t port,
mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl)
{
mdns_result_t *r = search->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol && !_str_null_or_empty(r->hostname) && !strcasecmp(hostname, r->hostname)) {
_mdns_result_update_ttl(r, ttl);
return;
}{...}
r = r->next;
}{...}
if (!search->max_results || search->num_results < search->max_results) {
r = (mdns_result_t *)mdns_mem_malloc(sizeof(mdns_result_t));
if (!r) {
HOOK_MALLOC_FAILED;
return;
}{...}
memset(r, 0, sizeof(mdns_result_t));
r->hostname = mdns_mem_strdup(hostname);
if (!r->hostname) {
mdns_mem_free(r);
return;
}{...}
if (search->instance) {
r->instance_name = mdns_mem_strdup(search->instance);
}{...}
r->service_type = mdns_mem_strdup(search->service);
r->proto = mdns_mem_strdup(search->proto);
r->port = port;
r->esp_netif = _mdns_get_esp_netif(tcpip_if);
r->ip_protocol = ip_protocol;
r->ttl = ttl;
r->next = search->result;
search->result = r;
search->num_results++;
}{...}
}{ ... }
/* ... */
static void _mdns_search_result_add_txt(mdns_search_once_t *search, mdns_txt_item_t *txt, uint8_t *txt_value_len,
size_t txt_count, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol,
uint32_t ttl)
{
mdns_result_t *r = search->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol) {
if (r->txt) {
goto free_txt;
}{...}
r->txt = txt;
r->txt_value_len = txt_value_len;
r->txt_count = txt_count;
_mdns_result_update_ttl(r, ttl);
return;
}{...}
r = r->next;
}{...}
if (!search->max_results || search->num_results < search->max_results) {
r = (mdns_result_t *)mdns_mem_malloc(sizeof(mdns_result_t));
if (!r) {
HOOK_MALLOC_FAILED;
goto free_txt;
}{...}
memset(r, 0, sizeof(mdns_result_t));
r->txt = txt;
r->txt_value_len = txt_value_len;
r->txt_count = txt_count;
r->esp_netif = _mdns_get_esp_netif(tcpip_if);
r->ip_protocol = ip_protocol;
r->ttl = ttl;
r->next = search->result;
search->result = r;
search->num_results++;
}{...}
return;
free_txt:
for (size_t i = 0; i < txt_count; i++) {
mdns_mem_free((char *)(txt[i].key));
mdns_mem_free((char *)(txt[i].value));
}{...}
mdns_mem_free(txt);
mdns_mem_free(txt_value_len);
}{ ... }
/* ... */
static mdns_search_once_t *_mdns_search_find_from(mdns_search_once_t *s, mdns_name_t *name, uint16_t type, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
mdns_result_t *r = NULL;
while (s) {
if (s->state == SEARCH_OFF) {
s = s->next;
continue;
}{...}
if (type == MDNS_TYPE_A || type == MDNS_TYPE_AAAA) {
if ((s->type == MDNS_TYPE_ANY && s->service != NULL)
|| (s->type != MDNS_TYPE_ANY && s->type != type && s->type != MDNS_TYPE_PTR && s->type != MDNS_TYPE_SRV)) {
s = s->next;
continue;
}{...}
if (s->type != MDNS_TYPE_PTR && s->type != MDNS_TYPE_SRV) {
if (!strcasecmp(name->host, s->instance)) {
return s;
}{...}
s = s->next;
continue;
}{...}
r = s->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol && !_str_null_or_empty(r->hostname) && !strcasecmp(name->host, r->hostname)) {
return s;
}{...}
r = r->next;
}{...}
s = s->next;
continue;
}{...}
if (type == MDNS_TYPE_SRV || type == MDNS_TYPE_TXT) {
if ((s->type == MDNS_TYPE_ANY && s->service == NULL)
|| (s->type != MDNS_TYPE_ANY && s->type != type && s->type != MDNS_TYPE_PTR)) {
s = s->next;
continue;
}{...}
if (strcasecmp(name->service, s->service)
|| strcasecmp(name->proto, s->proto)) {
s = s->next;
continue;
}{...}
if (s->type != MDNS_TYPE_PTR) {
if (s->instance && strcasecmp(name->host, s->instance) == 0) {
return s;
}{...}
s = s->next;
continue;
}{...}
return s;
}{...}
if (type == MDNS_TYPE_PTR && type == s->type && !strcasecmp(name->service, s->service) && !strcasecmp(name->proto, s->proto)) {
return s;
}{...}
s = s->next;
}{...}
return NULL;
}{ ... }
/* ... */
static mdns_tx_packet_t *_mdns_create_search_packet(mdns_search_once_t *search, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
mdns_result_t *r = NULL;
mdns_tx_packet_t *packet = _mdns_alloc_packet_default(tcpip_if, ip_protocol);
if (!packet) {
return NULL;
}{...}
mdns_out_question_t *q = (mdns_out_question_t *)mdns_mem_malloc(sizeof(mdns_out_question_t));
if (!q) {
HOOK_MALLOC_FAILED;
_mdns_free_tx_packet(packet);
return NULL;
}{...}
q->next = NULL;
q->unicast = search->unicast;
q->type = search->type;
q->host = search->instance;
q->service = search->service;
q->proto = search->proto;
q->domain = MDNS_DEFAULT_DOMAIN;
q->own_dynamic_memory = false;
queueToEnd(mdns_out_question_t, packet->questions, q);
if (search->type == MDNS_TYPE_PTR) {
r = search->result;
while (r) {
if (r->esp_netif != _mdns_get_esp_netif(tcpip_if) || r->ip_protocol != ip_protocol || r->instance_name == NULL || r->hostname == NULL || r->addr == NULL) {
r = r->next;
continue;
}{...}
mdns_out_answer_t *a = (mdns_out_answer_t *)mdns_mem_malloc(sizeof(mdns_out_answer_t));
if (!a) {
HOOK_MALLOC_FAILED;
_mdns_free_tx_packet(packet);
return NULL;
}{...}
a->type = MDNS_TYPE_PTR;
a->service = NULL;
a->custom_instance = r->instance_name;
a->custom_service = search->service;
a->custom_proto = search->proto;
a->bye = false;
a->flush = false;
a->next = NULL;
queueToEnd(mdns_out_answer_t, packet->answers, a);
r = r->next;
}{...}
}{...}
return packet;
}{ ... }
/* ... */
static void _mdns_search_send_pcb(mdns_search_once_t *search, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
mdns_tx_packet_t *packet = NULL;
if (mdns_is_netif_ready(tcpip_if, ip_protocol) && _mdns_server->interfaces[tcpip_if].pcbs[ip_protocol].state > PCB_INIT) {
packet = _mdns_create_search_packet(search, tcpip_if, ip_protocol);
if (!packet) {
return;
}{...}
_mdns_dispatch_tx_packet(packet);
_mdns_free_tx_packet(packet);
}{...}
}{ ... }
/* ... */
static void _mdns_search_send(mdns_search_once_t *search)
{
mdns_search_once_t *queue = _mdns_server->search_once;
bool found = false;
while (queue) {
if (queue == search) {
found = true;
break;
}{...}
queue = queue->next;
}{...}
if (!found) {
return;
}{...}
uint8_t i, j;
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
for (j = 0; j < MDNS_IP_PROTOCOL_MAX; j++) {
_mdns_search_send_pcb(search, (mdns_if_t)i, (mdns_ip_protocol_t)j);
}{...}
}{...}
}{ ... }
static void _mdns_tx_handle_packet(mdns_tx_packet_t *p)
{
mdns_tx_packet_t *a = NULL;
mdns_out_question_t *q = NULL;
mdns_pcb_t *pcb = &_mdns_server->interfaces[p->tcpip_if].pcbs[p->ip_protocol];
uint32_t send_after = 1000;
if (pcb->state == PCB_OFF) {
_mdns_free_tx_packet(p);
return;
}{...}
_mdns_dispatch_tx_packet(p);
switch (pcb->state) {
case PCB_PROBE_1:
q = p->questions;
while (q) {
q->unicast = false;
q = q->next;
}{...}
...
case PCB_PROBE_2:
_mdns_schedule_tx_packet(p, 250);
pcb->state = (mdns_pcb_state_t)((uint8_t)(pcb->state) + 1);
break;...
case PCB_PROBE_3:
a = _mdns_create_announce_from_probe(p);
if (!a) {
_mdns_schedule_tx_packet(p, 250);
break;
}{...}
pcb->probe_running = false;
pcb->probe_ip = false;
pcb->probe_services_len = 0;
pcb->failed_probes = 0;
mdns_mem_free(pcb->probe_services);
pcb->probe_services = NULL;
_mdns_free_tx_packet(p);
p = a;
send_after = 250;
...
case PCB_ANNOUNCE_1:
...
case PCB_ANNOUNCE_2:
_mdns_schedule_tx_packet(p, send_after);
pcb->state = (mdns_pcb_state_t)((uint8_t)(pcb->state) + 1);
break;...
case PCB_ANNOUNCE_3:
pcb->state = PCB_RUNNING;
_mdns_free_tx_packet(p);
break;...
default:
_mdns_free_tx_packet(p);
break;...
}{...}
}{ ... }
static void _mdns_remap_self_service_hostname(const char *old_hostname, const char *new_hostname)
{
mdns_srv_item_t *service = _mdns_server->services;
while (service) {
if (service->service->hostname &&
strcmp(service->service->hostname, old_hostname) == 0) {
mdns_mem_free((char *)service->service->hostname);
service->service->hostname = mdns_mem_strdup(new_hostname);
}{...}
service = service->next;
}{...}
}{ ... }
static void _mdns_sync_browse_result_link_free(mdns_browse_sync_t *browse_sync)
{
mdns_browse_result_sync_t *current = browse_sync->sync_result;
mdns_browse_result_sync_t *need_free;
while (current) {
need_free = current;
current = current->next;
mdns_mem_free(need_free);
}{...}
mdns_mem_free(browse_sync);
}{ ... }
/* ... */
static void _mdns_free_action(mdns_action_t *action)
{
switch (action->type) {
case ACTION_HOSTNAME_SET:
mdns_mem_free(action->data.hostname_set.hostname);
break;...
case ACTION_INSTANCE_SET:
mdns_mem_free(action->data.instance);
break;...
case ACTION_SEARCH_ADD:
...
case ACTION_SEARCH_SEND:
...
case ACTION_SEARCH_END:
_mdns_search_free(action->data.search_add.search);
break;...
case ACTION_BROWSE_ADD:
...
case ACTION_BROWSE_END:
_mdns_browse_item_free(action->data.browse_add.browse);
break;...
case ACTION_BROWSE_SYNC:
_mdns_sync_browse_result_link_free(action->data.browse_sync.browse_sync);
break;...
case ACTION_TX_HANDLE:
_mdns_free_tx_packet(action->data.tx_handle.packet);
break;...
case ACTION_RX_HANDLE:
_mdns_packet_free(action->data.rx_handle.packet);
break;...
case ACTION_DELEGATE_HOSTNAME_SET_ADDR:
case ACTION_DELEGATE_HOSTNAME_ADD:
mdns_mem_free((char *)action->data.delegate_hostname.hostname);
free_address_list(action->data.delegate_hostname.address_list);
break;...
case ACTION_DELEGATE_HOSTNAME_REMOVE:
mdns_mem_free((char *)action->data.delegate_hostname.hostname);
break;...
default:
break;...
}{...}
mdns_mem_free(action);
}{ ... }
/* ... */
static void _mdns_execute_action(mdns_action_t *action)
{
switch (action->type) {
case ACTION_SYSTEM_EVENT:
perform_event_action(action->data.sys_event.interface, action->data.sys_event.event_action);
break;...
case ACTION_HOSTNAME_SET:
_mdns_send_bye_all_pcbs_no_instance(true);
_mdns_remap_self_service_hostname(_mdns_server->hostname, action->data.hostname_set.hostname);
mdns_mem_free((char *)_mdns_server->hostname);
_mdns_server->hostname = action->data.hostname_set.hostname;
_mdns_self_host.hostname = action->data.hostname_set.hostname;
_mdns_restart_all_pcbs();
xSemaphoreGive(_mdns_server->action_sema);
break;...
case ACTION_INSTANCE_SET:
_mdns_send_bye_all_pcbs_no_instance(false);
mdns_mem_free((char *)_mdns_server->instance);
_mdns_server->instance = action->data.instance;
_mdns_restart_all_pcbs_no_instance();
break;...
case ACTION_SEARCH_ADD:
_mdns_search_add(action->data.search_add.search);
break;...
case ACTION_SEARCH_SEND:
_mdns_search_send(action->data.search_add.search);
break;...
case ACTION_SEARCH_END:
_mdns_search_finish(action->data.search_add.search);
break;
...
case ACTION_BROWSE_ADD:
_mdns_browse_add(action->data.browse_add.browse);
break;...
case ACTION_BROWSE_SYNC:
_mdns_browse_sync(action->data.browse_sync.browse_sync);
_mdns_sync_browse_result_link_free(action->data.browse_sync.browse_sync);
break;...
case ACTION_BROWSE_END:
_mdns_browse_finish(action->data.browse_add.browse);
break;
...
case ACTION_TX_HANDLE: {
mdns_tx_packet_t *p = _mdns_server->tx_queue_head;
if (p && p == action->data.tx_handle.packet && p->queued) {
p->queued = false;
_mdns_server->tx_queue_head = p->next;
_mdns_tx_handle_packet(p);
}{...} else {
ESP_LOGD(TAG, "Skipping transmit of an unexpected packet!");
}{...}
}{...}
break;...
case ACTION_RX_HANDLE:
mdns_parse_packet(action->data.rx_handle.packet);
_mdns_packet_free(action->data.rx_handle.packet);
break;...
case ACTION_DELEGATE_HOSTNAME_ADD:
if (!_mdns_delegate_hostname_add(action->data.delegate_hostname.hostname,
action->data.delegate_hostname.address_list)) {
mdns_mem_free((char *)action->data.delegate_hostname.hostname);
free_address_list(action->data.delegate_hostname.address_list);
}{...}
xSemaphoreGive(_mdns_server->action_sema);
break;...
case ACTION_DELEGATE_HOSTNAME_SET_ADDR:
if (!_mdns_delegate_hostname_set_address(action->data.delegate_hostname.hostname,
action->data.delegate_hostname.address_list)) {
free_address_list(action->data.delegate_hostname.address_list);
}{...}
mdns_mem_free((char *)action->data.delegate_hostname.hostname);
break;...
case ACTION_DELEGATE_HOSTNAME_REMOVE:
_mdns_delegate_hostname_remove(action->data.delegate_hostname.hostname);
mdns_mem_free((char *)action->data.delegate_hostname.hostname);
break;...
default:
break;...
}{...}
mdns_mem_free(action);
}{ ... }
/* ... */
static esp_err_t _mdns_send_search_action(mdns_action_type_t type, mdns_search_once_t *search)
{
mdns_action_t *action = NULL;
action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
return ESP_ERR_NO_MEM;
}{...}
action->type = type;
action->data.search_add.search = search;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
/* ... */
static void _mdns_scheduler_run(void)
{
MDNS_SERVICE_LOCK();
mdns_tx_packet_t *p = _mdns_server->tx_queue_head;
mdns_action_t *action = NULL;
while (p && p->queued) {
p = p->next;
}{...}
if (!p) {
MDNS_SERVICE_UNLOCK();
return;
}{...}
while (p && (int32_t)(p->send_at - (xTaskGetTickCount() * portTICK_PERIOD_MS)) < 0) {
action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (action) {
action->type = ACTION_TX_HANDLE;
action->data.tx_handle.packet = p;
p->queued = true;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(action);
p->queued = false;
}{...}
}{...} else {
HOOK_MALLOC_FAILED;
break;
}{...}
p = p->next;
}{...}
MDNS_SERVICE_UNLOCK();
}{ ... }
/* ... */
static void _mdns_search_run(void)
{
MDNS_SERVICE_LOCK();
mdns_search_once_t *s = _mdns_server->search_once;
uint32_t now = xTaskGetTickCount() * portTICK_PERIOD_MS;
if (!s) {
MDNS_SERVICE_UNLOCK();
return;
}{...}
while (s) {
if (s->state != SEARCH_OFF) {
if (now > (s->started_at + s->timeout)) {
s->state = SEARCH_OFF;
if (_mdns_send_search_action(ACTION_SEARCH_END, s) != ESP_OK) {
s->state = SEARCH_RUNNING;
}{...}
}{...} else if (s->state == SEARCH_INIT || (now - s->sent_at) > 1000) {
s->state = SEARCH_RUNNING;
s->sent_at = now;
if (_mdns_send_search_action(ACTION_SEARCH_SEND, s) != ESP_OK) {
s->sent_at -= 1000;
}{...}
}{...}
}{...}
s = s->next;
}{...}
MDNS_SERVICE_UNLOCK();
}{ ... }
/* ... */
static void _mdns_service_task(void *pvParameters)
{
mdns_action_t *a = NULL;
for (;;) {
if (_mdns_server && _mdns_server->action_queue) {
if (xQueueReceive(_mdns_server->action_queue, &a, portMAX_DELAY) == pdTRUE) {
assert(a);
if (a->type == ACTION_TASK_STOP) {
break;
}{...}
MDNS_SERVICE_LOCK();
_mdns_execute_action(a);
MDNS_SERVICE_UNLOCK();
}{...}
}{...} else {
vTaskDelay(500 * portTICK_PERIOD_MS);
}{...}
}{...}
_mdns_service_task_handle = NULL;
vTaskDelete(NULL);
}{ ... }
static void _mdns_timer_cb(void *arg)
{
_mdns_scheduler_run();
_mdns_search_run();
}{ ... }
static esp_err_t _mdns_start_timer(void)
{
esp_timer_create_args_t timer_conf = {
.callback = _mdns_timer_cb,
.arg = NULL,
.dispatch_method = ESP_TIMER_TASK,
.name = "mdns_timer"
}{...};
esp_err_t err = esp_timer_create(&timer_conf, &(_mdns_server->timer_handle));
if (err) {
return err;
}{...}
return esp_timer_start_periodic(_mdns_server->timer_handle, MDNS_TIMER_PERIOD_US);
}{ ... }
static esp_err_t _mdns_stop_timer(void)
{
esp_err_t err = ESP_OK;
if (_mdns_server->timer_handle) {
err = esp_timer_stop(_mdns_server->timer_handle);
if (err) {
return err;
}{...}
err = esp_timer_delete(_mdns_server->timer_handle);
}{...}
return err;
}{ ... }
static esp_err_t _mdns_task_create_with_caps(void)
{
esp_err_t ret = ESP_OK;
static StaticTask_t mdns_task_buffer;
_mdns_stack_buffer = mdns_mem_task_malloc(MDNS_SERVICE_STACK_DEPTH);
ESP_GOTO_ON_FALSE(_mdns_stack_buffer != NULL, ESP_FAIL, err, TAG, "failed to allocate memory for the mDNS task's stack");
_mdns_service_task_handle = xTaskCreateStaticPinnedToCore(_mdns_service_task, "mdns", MDNS_SERVICE_STACK_DEPTH, NULL, MDNS_TASK_PRIORITY, _mdns_stack_buffer, &mdns_task_buffer, MDNS_TASK_AFFINITY);
ESP_GOTO_ON_FALSE(_mdns_service_task_handle != NULL, ESP_FAIL, err, TAG, "failed to create task for the mDNS");
return ret;
err:
mdns_mem_task_free(_mdns_stack_buffer);
return ret;
}{ ... }
/* ... */
static esp_err_t _mdns_service_task_start(void)
{
esp_err_t ret = ESP_OK;
if (!_mdns_service_semaphore) {
_mdns_service_semaphore = xSemaphoreCreateMutex();
ESP_RETURN_ON_FALSE(_mdns_service_semaphore != NULL, ESP_FAIL, TAG, "Failed to create the mDNS service lock");
}{...}
MDNS_SERVICE_LOCK();
ESP_GOTO_ON_ERROR(_mdns_start_timer(), err, TAG, "Failed to start the mDNS service timer");
if (!_mdns_service_task_handle) {
ESP_GOTO_ON_ERROR(_mdns_task_create_with_caps(), err_stop_timer, TAG, "Failed to start the mDNS service task");
#ifdef MDNS_ENABLE_DEBUG
#if !CONFIG_IDF_TARGET_LINUX
StackType_t *mdns_debug_stack_buffer;
StaticTask_t *mdns_debug_task_buffer;
xTaskGetStaticBuffers(_mdns_service_task_handle, &mdns_debug_stack_buffer, &mdns_debug_task_buffer);
_mdns_dbg_printf("mdns_debug_stack_buffer:%p mdns_debug_task_buffer:%p\n", mdns_debug_stack_buffer, mdns_debug_task_buffer);/* ... */
#endif /* ... */
#endif
}{...}
MDNS_SERVICE_UNLOCK();
return ret;
err_stop_timer:
_mdns_stop_timer();
err:
MDNS_SERVICE_UNLOCK();
vSemaphoreDelete(_mdns_service_semaphore);
_mdns_service_semaphore = NULL;
return ret;
}{ ... }
/* ... */
static esp_err_t _mdns_service_task_stop(void)
{
_mdns_stop_timer();
if (_mdns_service_task_handle) {
mdns_action_t action;
mdns_action_t *a = &action;
action.type = ACTION_TASK_STOP;
if (xQueueSend(_mdns_server->action_queue, &a, (TickType_t)0) != pdPASS) {
vTaskDelete(_mdns_service_task_handle);
_mdns_service_task_handle = NULL;
}{...}
while (_mdns_service_task_handle) {
vTaskDelay(10 / portTICK_PERIOD_MS);
}{...}
}{...}
vSemaphoreDelete(_mdns_service_semaphore);
_mdns_service_semaphore = NULL;
return ESP_OK;
}{ ... }
static esp_err_t mdns_post_custom_action_tcpip_if(mdns_if_t mdns_if, mdns_event_actions_t event_action)
{
if (!_mdns_server || mdns_if >= MDNS_MAX_INTERFACES) {
return ESP_ERR_INVALID_STATE;
}{...}
mdns_action_t *action = (mdns_action_t *)mdns_mem_calloc(1, sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
return ESP_ERR_NO_MEM;
}{...}
action->type = ACTION_SYSTEM_EVENT;
action->data.sys_event.event_action = event_action;
action->data.sys_event.interface = mdns_if;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(action);
}{...}
return ESP_OK;
}{ ... }
static inline void set_default_duplicated_interfaces(void)
{
mdns_if_t wifi_sta_if = MDNS_MAX_INTERFACES;
mdns_if_t eth_if = MDNS_MAX_INTERFACES;
for (mdns_if_t i = 0; i < MDNS_MAX_INTERFACES; i++) {
if (s_esp_netifs[i].predefined && s_esp_netifs[i].predef_if == MDNS_IF_STA) {
wifi_sta_if = i;
}{...}
if (s_esp_netifs[i].predefined && s_esp_netifs[i].predef_if == MDNS_IF_ETH) {
eth_if = i;
}{...}
}{...}
if (wifi_sta_if != MDNS_MAX_INTERFACES && eth_if != MDNS_MAX_INTERFACES) {
s_esp_netifs[wifi_sta_if].duplicate = eth_if;
s_esp_netifs[eth_if].duplicate = wifi_sta_if;
}{...}
}{ ... }
static inline void unregister_predefined_handlers(void)
{
#if MDNS_ESP_WIFI_ENABLED && (CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP)
esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, mdns_preset_if_handle_system_event);
#endif
#if CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP || CONFIG_MDNS_PREDEF_NETIF_ETH
esp_event_handler_unregister(IP_EVENT, ESP_EVENT_ANY_ID, mdns_preset_if_handle_system_event);
#endif
#if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH
esp_event_handler_unregister(ETH_EVENT, ESP_EVENT_ANY_ID, mdns_preset_if_handle_system_event);
#endif
}{ ... }
/* ... */
esp_err_t mdns_netif_action(esp_netif_t *esp_netif, mdns_event_actions_t event_action)
{
return mdns_post_custom_action_tcpip_if(_mdns_get_if_from_esp_netif(esp_netif), event_action);
}{ ... }
esp_err_t mdns_register_netif(esp_netif_t *esp_netif)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
esp_err_t err = ESP_ERR_NO_MEM;
MDNS_SERVICE_LOCK();
for (mdns_if_t i = 0; i < MDNS_MAX_INTERFACES; ++i) {
if (s_esp_netifs[i].netif == esp_netif) {
MDNS_SERVICE_UNLOCK();
return ESP_ERR_INVALID_STATE;
}{...}
}{...}
for (mdns_if_t i = 0; i < MDNS_MAX_INTERFACES; ++i) {
if (!s_esp_netifs[i].predefined && s_esp_netifs[i].netif == NULL) {
s_esp_netifs[i].netif = esp_netif;
err = ESP_OK;
break;
}{...}
}{...}
MDNS_SERVICE_UNLOCK();
return err;
}{ ... }
esp_err_t mdns_unregister_netif(esp_netif_t *esp_netif)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
esp_err_t err = ESP_ERR_NOT_FOUND;
MDNS_SERVICE_LOCK();
for (mdns_if_t i = 0; i < MDNS_MAX_INTERFACES; ++i) {
if (!s_esp_netifs[i].predefined && s_esp_netifs[i].netif == esp_netif) {
s_esp_netifs[i].netif = NULL;
err = ESP_OK;
break;
}{...}
}{...}
MDNS_SERVICE_UNLOCK();
return err;
}{ ... }
esp_err_t mdns_init(void)
{
esp_err_t err = ESP_OK;
if (_mdns_server) {
return err;
}{...}
_mdns_server = (mdns_server_t *)mdns_mem_malloc(sizeof(mdns_server_t));
if (!_mdns_server) {
HOOK_MALLOC_FAILED;
return ESP_ERR_NO_MEM;
}{...}
memset((uint8_t *)_mdns_server, 0, sizeof(mdns_server_t));
for (mdns_if_t i = 0; i < MDNS_MAX_INTERFACES; ++i) {
s_esp_netifs[i].netif = NULL;
}{...}
_mdns_server->action_queue = xQueueCreate(MDNS_ACTION_QUEUE_LEN, sizeof(mdns_action_t *));
if (!_mdns_server->action_queue) {
err = ESP_ERR_NO_MEM;
goto free_server;
}{...}
_mdns_server->action_sema = xSemaphoreCreateBinary();
if (!_mdns_server->action_sema) {
err = ESP_ERR_NO_MEM;
goto free_queue;
}{...}
#if MDNS_ESP_WIFI_ENABLED && (CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP)
if ((err = esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, mdns_preset_if_handle_system_event, NULL)) != ESP_OK) {
goto free_event_handlers;
}{...}
#endif/* ... */
#if CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP || CONFIG_MDNS_PREDEF_NETIF_ETH
if ((err = esp_event_handler_register(IP_EVENT, ESP_EVENT_ANY_ID, mdns_preset_if_handle_system_event, NULL)) != ESP_OK) {
goto free_event_handlers;
}{...}
#endif/* ... */
#if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH
if ((err = esp_event_handler_register(ETH_EVENT, ESP_EVENT_ANY_ID, mdns_preset_if_handle_system_event, NULL)) != ESP_OK) {
goto free_event_handlers;
}{...}
#endif/* ... */
#if CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP || CONFIG_MDNS_PREDEF_NETIF_ETH
set_default_duplicated_interfaces();
#endif
uint8_t i;
#ifdef CONFIG_LWIP_IPV6
esp_ip6_addr_t tmp_addr6;
#endif
#ifdef CONFIG_LWIP_IPV4
esp_netif_ip_info_t if_ip_info;
#endif
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
#ifdef CONFIG_LWIP_IPV6
if (!esp_netif_get_ip6_linklocal(_mdns_get_esp_netif(i), &tmp_addr6) && !_ipv6_address_is_zero(tmp_addr6)) {
_mdns_enable_pcb(i, MDNS_IP_PROTOCOL_V6);
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV4
if (!esp_netif_get_ip_info(_mdns_get_esp_netif(i), &if_ip_info) && if_ip_info.ip.addr) {
_mdns_enable_pcb(i, MDNS_IP_PROTOCOL_V4);
}{...}
#endif/* ... */
}{...}
if (_mdns_service_task_start()) {
err = ESP_FAIL;
goto free_all_and_disable_pcbs;
}{...}
return ESP_OK;
free_all_and_disable_pcbs:
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
_mdns_disable_pcb(i, MDNS_IP_PROTOCOL_V6);
_mdns_disable_pcb(i, MDNS_IP_PROTOCOL_V4);
s_esp_netifs[i].duplicate = MDNS_MAX_INTERFACES;
}{...}
#if CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP || CONFIG_MDNS_PREDEF_NETIF_ETH
free_event_handlers:
unregister_predefined_handlers();/* ... */
#endif
vSemaphoreDelete(_mdns_server->action_sema);
free_queue:
vQueueDelete(_mdns_server->action_queue);
free_server:
mdns_mem_free(_mdns_server);
_mdns_server = NULL;
return err;
}{ ... }
void mdns_free(void)
{
uint8_t i, j;
if (!_mdns_server) {
return;
}{...}
unregister_predefined_handlers();
mdns_service_remove_all();
free_delegated_hostnames();
_mdns_service_task_stop();
mdns_mem_task_free(_mdns_stack_buffer);
for (i = 0; i < MDNS_MAX_INTERFACES; i++) {
for (j = 0; j < MDNS_IP_PROTOCOL_MAX; j++) {
mdns_pcb_deinit_local(i, j);
}{...}
}{...}
mdns_mem_free((char *)_mdns_server->hostname);
mdns_mem_free((char *)_mdns_server->instance);
if (_mdns_server->action_queue) {
mdns_action_t *c;
while (xQueueReceive(_mdns_server->action_queue, &c, 0) == pdTRUE) {
_mdns_free_action(c);
}{...}
vQueueDelete(_mdns_server->action_queue);
}{...}
_mdns_clear_tx_queue_head();
while (_mdns_server->search_once) {
mdns_search_once_t *h = _mdns_server->search_once;
_mdns_server->search_once = h->next;
mdns_mem_free(h->instance);
mdns_mem_free(h->service);
mdns_mem_free(h->proto);
vSemaphoreDelete(h->done_semaphore);
if (h->result) {
_mdns_query_results_free(h->result);
}{...}
mdns_mem_free(h);
}{...}
while (_mdns_server->browse) {
mdns_browse_t *b = _mdns_server->browse;
_mdns_server->browse = _mdns_server->browse->next;
_mdns_browse_item_free(b);
}{...}
vSemaphoreDelete(_mdns_server->action_sema);
mdns_mem_free(_mdns_server);
_mdns_server = NULL;
}{ ... }
esp_err_t mdns_hostname_set(const char *hostname)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_ARG;
}{...}
if (_str_null_or_empty(hostname) || strlen(hostname) > (MDNS_NAME_BUF_LEN - 1)) {
return ESP_ERR_INVALID_ARG;
}{...}
char *new_hostname = mdns_mem_strndup(hostname, MDNS_NAME_BUF_LEN - 1);
if (!new_hostname) {
return ESP_ERR_NO_MEM;
}{...}
mdns_action_t *action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
mdns_mem_free(new_hostname);
return ESP_ERR_NO_MEM;
}{...}
action->type = ACTION_HOSTNAME_SET;
action->data.hostname_set.hostname = new_hostname;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(new_hostname);
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
xSemaphoreTake(_mdns_server->action_sema, portMAX_DELAY);
return ESP_OK;
}{ ... }
esp_err_t mdns_hostname_get(char *hostname)
{
if (!hostname) {
return ESP_ERR_INVALID_ARG;
}{...}
if (!_mdns_server || !_mdns_server->hostname) {
return ESP_ERR_INVALID_STATE;
}{...}
MDNS_SERVICE_LOCK();
size_t len = strnlen(_mdns_server->hostname, MDNS_NAME_BUF_LEN - 1);
strncpy(hostname, _mdns_server->hostname, len);
hostname[len] = 0;
MDNS_SERVICE_UNLOCK();
return ESP_OK;
}{ ... }
esp_err_t mdns_delegate_hostname_add(const char *hostname, const mdns_ip_addr_t *address_list)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
if (_str_null_or_empty(hostname) || strlen(hostname) > (MDNS_NAME_BUF_LEN - 1)) {
return ESP_ERR_INVALID_ARG;
}{...}
char *new_hostname = mdns_mem_strndup(hostname, MDNS_NAME_BUF_LEN - 1);
if (!new_hostname) {
return ESP_ERR_NO_MEM;
}{...}
mdns_action_t *action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
mdns_mem_free(new_hostname);
return ESP_ERR_NO_MEM;
}{...}
action->type = ACTION_DELEGATE_HOSTNAME_ADD;
action->data.delegate_hostname.hostname = new_hostname;
action->data.delegate_hostname.address_list = copy_address_list(address_list);
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(new_hostname);
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
xSemaphoreTake(_mdns_server->action_sema, portMAX_DELAY);
return ESP_OK;
}{ ... }
esp_err_t mdns_delegate_hostname_remove(const char *hostname)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
if (_str_null_or_empty(hostname) || strlen(hostname) > (MDNS_NAME_BUF_LEN - 1)) {
return ESP_ERR_INVALID_ARG;
}{...}
char *new_hostname = mdns_mem_strndup(hostname, MDNS_NAME_BUF_LEN - 1);
if (!new_hostname) {
return ESP_ERR_NO_MEM;
}{...}
mdns_action_t *action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
mdns_mem_free(new_hostname);
return ESP_ERR_NO_MEM;
}{...}
action->type = ACTION_DELEGATE_HOSTNAME_REMOVE;
action->data.delegate_hostname.hostname = new_hostname;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(new_hostname);
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
esp_err_t mdns_delegate_hostname_set_address(const char *hostname, const mdns_ip_addr_t *address_list)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
if (_str_null_or_empty(hostname) || strlen(hostname) > (MDNS_NAME_BUF_LEN - 1)) {
return ESP_ERR_INVALID_ARG;
}{...}
char *new_hostname = mdns_mem_strndup(hostname, MDNS_NAME_BUF_LEN - 1);
if (!new_hostname) {
return ESP_ERR_NO_MEM;
}{...}
mdns_action_t *action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
mdns_mem_free(new_hostname);
return ESP_ERR_NO_MEM;
}{...}
action->type = ACTION_DELEGATE_HOSTNAME_SET_ADDR;
action->data.delegate_hostname.hostname = new_hostname;
action->data.delegate_hostname.address_list = copy_address_list(address_list);
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(new_hostname);
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
bool mdns_hostname_exists(const char *hostname)
{
bool ret = false;
MDNS_SERVICE_LOCK();
ret = _hostname_is_ours(hostname);
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
esp_err_t mdns_instance_name_set(const char *instance)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
if (_str_null_or_empty(instance) || _mdns_server->hostname == NULL || strlen(instance) > (MDNS_NAME_BUF_LEN - 1)) {
return ESP_ERR_INVALID_ARG;
}{...}
char *new_instance = mdns_mem_strndup(instance, MDNS_NAME_BUF_LEN - 1);
if (!new_instance) {
return ESP_ERR_NO_MEM;
}{...}
mdns_action_t *action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
mdns_mem_free(new_instance);
return ESP_ERR_NO_MEM;
}{...}
action->type = ACTION_INSTANCE_SET;
action->data.instance = new_instance;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(new_instance);
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
/* ... */
esp_err_t mdns_service_add_for_host(const char *instance, const char *service, const char *proto, const char *host,
uint16_t port, mdns_txt_item_t txt[], size_t num_items)
{
if (!_mdns_server || _str_null_or_empty(service) || _str_null_or_empty(proto) || !_mdns_server->hostname) {
return ESP_ERR_INVALID_ARG;
}{...}
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
const char *hostname = host ? host : _mdns_server->hostname;
mdns_service_t *s = NULL;
ESP_GOTO_ON_FALSE(_mdns_can_add_more_services(), ESP_ERR_NO_MEM, err, TAG,
"Cannot add more services, please increase CONFIG_MDNS_MAX_SERVICES (%d)", CONFIG_MDNS_MAX_SERVICES);
mdns_srv_item_t *item = _mdns_get_service_item_instance(instance, service, proto, hostname);
ESP_GOTO_ON_FALSE(!item, ESP_ERR_INVALID_ARG, err, TAG, "Service already exists");
s = _mdns_create_service(service, proto, hostname, port, instance, num_items, txt);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NO_MEM, err, TAG, "Cannot create service: Out of memory");
item = (mdns_srv_item_t *)mdns_mem_malloc(sizeof(mdns_srv_item_t));
ESP_GOTO_ON_FALSE(item, ESP_ERR_NO_MEM, err, TAG, "Cannot create service: Out of memory");
item->service = s;
item->next = NULL;
item->next = _mdns_server->services;
_mdns_server->services = item;
_mdns_probe_all_pcbs(&item, 1, false, false);
MDNS_SERVICE_UNLOCK();
return ESP_OK;
err:
MDNS_SERVICE_UNLOCK();
_mdns_free_service(s);
if (ret == ESP_ERR_NO_MEM) {
HOOK_MALLOC_FAILED;
}{...}
return ret;
}{ ... }
esp_err_t mdns_service_add(const char *instance, const char *service, const char *proto, uint16_t port,
mdns_txt_item_t txt[], size_t num_items)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_add_for_host(instance, service, proto, NULL, port, txt, num_items);
}{ ... }
bool mdns_service_exists(const char *service_type, const char *proto, const char *hostname)
{
bool ret = false;
MDNS_SERVICE_LOCK();
ret = _mdns_get_service_item(service_type, proto, hostname) != NULL;
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
bool mdns_service_exists_with_instance(const char *instance, const char *service_type, const char *proto,
const char *hostname)
{
bool ret = false;
MDNS_SERVICE_LOCK();
ret = _mdns_get_service_item_instance(instance, service_type, proto, hostname) != NULL;
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
static mdns_txt_item_t *_copy_mdns_txt_items(mdns_txt_linked_item_t *items, uint8_t **txt_value_len, size_t *txt_count)
{
mdns_txt_item_t *ret = NULL;
size_t ret_index = 0;
for (mdns_txt_linked_item_t *tmp = items; tmp != NULL; tmp = tmp->next) {
ret_index++;
}{...}
*txt_count = ret_index;
if (ret_index == 0) {
*txt_value_len = NULL;
return NULL;
}{...}
ret = (mdns_txt_item_t *)mdns_mem_calloc(ret_index, sizeof(mdns_txt_item_t));
*txt_value_len = (uint8_t *)mdns_mem_calloc(ret_index, sizeof(uint8_t));
if (!ret || !(*txt_value_len)) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
ret_index = 0;
for (mdns_txt_linked_item_t *tmp = items; tmp != NULL; tmp = tmp->next) {
size_t key_len = strlen(tmp->key);
char *key = (char *)mdns_mem_malloc(key_len + 1);
if (!key) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
memcpy(key, tmp->key, key_len);
key[key_len] = 0;
ret[ret_index].key = key;
char *value = (char *)mdns_mem_malloc(tmp->value_len + 1);
if (!value) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
memcpy(value, tmp->value, tmp->value_len);
value[tmp->value_len] = 0;
ret[ret_index].value = value;
(*txt_value_len)[ret_index] = tmp->value_len;
ret_index++;
}{...}
return ret;
handle_error:
for (size_t y = 0; y < ret_index + 1 && ret != NULL; y++) {
mdns_txt_item_t *t = &ret[y];
mdns_mem_free((char *)t->key);
mdns_mem_free((char *)t->value);
}{...}
mdns_mem_free(*txt_value_len);
mdns_mem_free(ret);
return NULL;
}{ ... }
static mdns_ip_addr_t *_copy_delegated_host_address_list(char *hostname)
{
mdns_host_item_t *host = _mdns_host_list;
while (host) {
if (strcasecmp(host->hostname, hostname) == 0) {
return copy_address_list(host->address_list);
}{...}
host = host->next;
}{...}
return NULL;
}{ ... }
static mdns_result_t *_mdns_lookup_service(const char *instance, const char *service, const char *proto, size_t max_results, bool selfhost)
{
if (_str_null_or_empty(service) || _str_null_or_empty(proto)) {
return NULL;
}{...}
mdns_result_t *results = NULL;
size_t num_results = 0;
mdns_srv_item_t *s = _mdns_server->services;
while (s) {
mdns_service_t *srv = s->service;
if (!srv || !srv->hostname) {
s = s->next;
continue;
}{...}
bool is_service_selfhosted = !_str_null_or_empty(_mdns_server->hostname) && !strcasecmp(_mdns_server->hostname, srv->hostname);
bool is_service_delegated = _str_null_or_empty(_mdns_server->hostname) || strcasecmp(_mdns_server->hostname, srv->hostname);
if ((selfhost && is_service_selfhosted) || (!selfhost && is_service_delegated)) {
if (!strcasecmp(srv->service, service) && !strcasecmp(srv->proto, proto) &&
(_str_null_or_empty(instance) || _mdns_instance_name_match(srv->instance, instance))) {
mdns_result_t *item = (mdns_result_t *)mdns_mem_malloc(sizeof(mdns_result_t));
if (!item) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
item->next = results;
results = item;
item->esp_netif = NULL;
item->ttl = _str_null_or_empty(instance) ? MDNS_ANSWER_PTR_TTL : MDNS_ANSWER_SRV_TTL;
item->ip_protocol = MDNS_IP_PROTOCOL_MAX;
if (srv->instance) {
item->instance_name = mdns_mem_strndup(srv->instance, MDNS_NAME_BUF_LEN - 1);
if (!item->instance_name) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
}{...} else {
item->instance_name = NULL;
}{...}
item->service_type = mdns_mem_strndup(srv->service, MDNS_NAME_BUF_LEN - 1);
if (!item->service_type) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
item->proto = mdns_mem_strndup(srv->proto, MDNS_NAME_BUF_LEN - 1);
if (!item->proto) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
item->hostname = mdns_mem_strndup(srv->hostname, MDNS_NAME_BUF_LEN - 1);
if (!item->hostname) {
HOOK_MALLOC_FAILED;
goto handle_error;
}{...}
item->port = srv->port;
item->txt = _copy_mdns_txt_items(srv->txt, &(item->txt_value_len), &(item->txt_count));
if (selfhost) {
item->addr = NULL;
}{...} else {
item->addr = _copy_delegated_host_address_list(item->hostname);
if (!item->addr) {
goto handle_error;
}{...}
}{...}
if (num_results < max_results) {
num_results++;
}{...}
if (num_results >= max_results) {
break;
}{...}
}{...}
}{...}
s = s->next;
}{...}
return results;
handle_error:
_mdns_query_results_free(results);
return NULL;
}{ ... }
esp_err_t mdns_service_port_set_for_host(const char *instance, const char *service, const char *proto, const char *host, uint16_t port)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
const char *hostname = host ? host : _mdns_server->hostname;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto) && port,
ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
s->service->port = port;
_mdns_announce_all_pcbs(&s, 1, true);
err:
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
esp_err_t mdns_service_port_set(const char *service, const char *proto, uint16_t port)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_port_set_for_host(NULL, service, proto, NULL, port);
}{ ... }
esp_err_t mdns_service_txt_set_for_host(const char *instance, const char *service, const char *proto, const char *host,
mdns_txt_item_t txt_items[], uint8_t num_items)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
const char *hostname = host ? host : _mdns_server->hostname;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto) && !(num_items && txt_items == NULL),
ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
mdns_txt_linked_item_t *new_txt = NULL;
if (num_items) {
new_txt = _mdns_allocate_txt(num_items, txt_items);
if (!new_txt) {
return ESP_ERR_NO_MEM;
}{...}
}{...}
mdns_service_t *srv = s->service;
mdns_txt_linked_item_t *txt = srv->txt;
srv->txt = NULL;
_mdns_free_linked_txt(txt);
srv->txt = new_txt;
_mdns_announce_all_pcbs(&s, 1, false);
err:
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
esp_err_t mdns_service_txt_set(const char *service, const char *proto, mdns_txt_item_t txt[], uint8_t num_items)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_txt_set_for_host(NULL, service, proto, NULL, txt, num_items);
}{ ... }
esp_err_t mdns_service_txt_item_set_for_host_with_explicit_value_len(const char *instance, const char *service, const char *proto,
const char *host, const char *key, const char *value_arg, uint8_t value_len)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
char *value = NULL;
mdns_txt_linked_item_t *new_txt = NULL;
const char *hostname = host ? host : _mdns_server->hostname;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto) && !_str_null_or_empty(key) &&
!((!value_arg && value_len)), ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
mdns_service_t *srv = s->service;
if (value_len > 0) {
value = (char *) mdns_mem_malloc(value_len);
ESP_GOTO_ON_FALSE(value, ESP_ERR_NO_MEM, out_of_mem, TAG, "Out of memory");
memcpy(value, value_arg, value_len);
}{...} else {
value_len = 0;
}{...}
mdns_txt_linked_item_t *txt = srv->txt;
while (txt) {
if (strcmp(txt->key, key) == 0) {
mdns_mem_free((char *)txt->value);
txt->value = value;
txt->value_len = value_len;
break;
}{...}
txt = txt->next;
}{...}
if (!txt) {
new_txt = (mdns_txt_linked_item_t *)mdns_mem_malloc(sizeof(mdns_txt_linked_item_t));
ESP_GOTO_ON_FALSE(new_txt, ESP_ERR_NO_MEM, out_of_mem, TAG, "Out of memory");
new_txt->key = mdns_mem_strdup(key);
ESP_GOTO_ON_FALSE(new_txt->key, ESP_ERR_NO_MEM, out_of_mem, TAG, "Out of memory");
new_txt->value = value;
new_txt->value_len = value_len;
new_txt->next = srv->txt;
srv->txt = new_txt;
}{...}
_mdns_announce_all_pcbs(&s, 1, false);
err:
MDNS_SERVICE_UNLOCK();
return ret;
out_of_mem:
MDNS_SERVICE_UNLOCK();
HOOK_MALLOC_FAILED;
mdns_mem_free(value);
mdns_mem_free(new_txt);
return ret;
}{ ... }
esp_err_t mdns_service_txt_item_set_for_host(const char *instance, const char *service, const char *proto, const char *hostname,
const char *key, const char *value)
{
return mdns_service_txt_item_set_for_host_with_explicit_value_len(instance, service, proto, hostname, key, value,
strlen(value));
}{ ... }
esp_err_t mdns_service_txt_item_set(const char *service, const char *proto, const char *key, const char *value)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_txt_item_set_for_host_with_explicit_value_len(NULL, service, proto, NULL, key,
value, strlen(value));
}{ ... }
esp_err_t mdns_service_txt_item_set_with_explicit_value_len(const char *service, const char *proto, const char *key,
const char *value, uint8_t value_len)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_txt_item_set_for_host_with_explicit_value_len(NULL, service, proto, NULL, key, value, value_len);
}{ ... }
esp_err_t mdns_service_txt_item_remove_for_host(const char *instance, const char *service, const char *proto, const char *host,
const char *key)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
const char *hostname = host ? host : _mdns_server->hostname;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto) && !_str_null_or_empty(key),
ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
mdns_service_t *srv = s->service;
mdns_txt_linked_item_t *txt = srv->txt;
if (!txt) {
goto err;
}{...}
if (strcmp(txt->key, key) == 0) {
srv->txt = txt->next;
mdns_mem_free((char *)txt->key);
mdns_mem_free((char *)txt->value);
mdns_mem_free(txt);
}{...} else {
while (txt->next) {
if (strcmp(txt->next->key, key) == 0) {
mdns_txt_linked_item_t *t = txt->next;
txt->next = t->next;
mdns_mem_free((char *)t->key);
mdns_mem_free((char *)t->value);
mdns_mem_free(t);
break;
}{...} else {
txt = txt->next;
}{...}
}{...}
}{...}
_mdns_announce_all_pcbs(&s, 1, false);
err:
MDNS_SERVICE_UNLOCK();
if (ret == ESP_ERR_NO_MEM) {
HOOK_MALLOC_FAILED;
}{...}
return ret;
}{ ... }
esp_err_t mdns_service_txt_item_remove(const char *service, const char *proto, const char *key)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_txt_item_remove_for_host(NULL, service, proto, NULL, key);
}{ ... }
static esp_err_t _mdns_service_subtype_remove_for_host(mdns_srv_item_t *service, const char *subtype)
{
esp_err_t ret = ESP_ERR_NOT_FOUND;
mdns_subtype_t *srv_subtype = service->service->subtype;
mdns_subtype_t *pre = service->service->subtype;
while (srv_subtype) {
if (strcmp(srv_subtype->subtype, subtype) == 0) {
if (srv_subtype == service->service->subtype) {
service->service->subtype = service->service->subtype->next;
}{...} else {
pre->next = srv_subtype->next;
}{...}
mdns_mem_free((char *)srv_subtype->subtype);
mdns_mem_free(srv_subtype);
ret = ESP_OK;
break;
}{...}
pre = srv_subtype;
srv_subtype = srv_subtype->next;
}{...}
if (ret == ESP_ERR_NOT_FOUND) {
ESP_LOGE(TAG, "Subtype : %s doesn't exist", subtype);
}{...}
return ret;
}{ ... }
esp_err_t mdns_service_subtype_remove_for_host(const char *instance_name, const char *service, const char *proto,
const char *hostname, const char *subtype)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto) &&
!_str_null_or_empty(subtype), ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance_name, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
ret = _mdns_service_subtype_remove_for_host(s, subtype);
ESP_GOTO_ON_ERROR(ret, err, TAG, "Failed to remove the subtype: %s", subtype);
mdns_subtype_t *remove_subtypes = (mdns_subtype_t *)mdns_mem_malloc(sizeof(mdns_subtype_t));
ESP_GOTO_ON_FALSE(remove_subtypes, ESP_ERR_NO_MEM, out_of_mem, TAG, "Out of memory");
remove_subtypes->subtype = mdns_mem_strdup(subtype);
ESP_GOTO_ON_FALSE(remove_subtypes->subtype, ESP_ERR_NO_MEM, out_of_mem, TAG, "Out of memory");
remove_subtypes->next = NULL;
_mdns_send_bye_subtype(s, instance_name, remove_subtypes);
_mdns_free_subtype(remove_subtypes);
err:
MDNS_SERVICE_UNLOCK();
return ret;
out_of_mem:
HOOK_MALLOC_FAILED;
mdns_mem_free(remove_subtypes);
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
static esp_err_t _mdns_service_subtype_add_for_host(mdns_srv_item_t *service, const char *subtype)
{
esp_err_t ret = ESP_OK;
mdns_subtype_t *srv_subtype = service->service->subtype;
while (srv_subtype) {
ESP_GOTO_ON_FALSE(strcmp(srv_subtype->subtype, subtype) != 0, ESP_ERR_INVALID_ARG, err, TAG, "Subtype: %s has already been added", subtype);
srv_subtype = srv_subtype->next;
}{...}
mdns_subtype_t *subtype_item = (mdns_subtype_t *)mdns_mem_malloc(sizeof(mdns_subtype_t));
ESP_GOTO_ON_FALSE(subtype_item, ESP_ERR_NO_MEM, out_of_mem, TAG, "Out of memory");
subtype_item->subtype = mdns_mem_strdup(subtype);
ESP_GOTO_ON_FALSE(subtype_item->subtype, ESP_ERR_NO_MEM, out_of_mem, TAG, "Out of memory");
subtype_item->next = service->service->subtype;
service->service->subtype = subtype_item;
err:
return ret;
out_of_mem:
HOOK_MALLOC_FAILED;
mdns_mem_free(subtype_item);
return ret;
}{ ... }
esp_err_t mdns_service_subtype_add_multiple_items_for_host(const char *instance_name, const char *service, const char *proto,
const char *hostname, mdns_subtype_item_t subtype[], uint8_t num_items)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
int cur_index = 0;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto) &&
(num_items > 0), ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance_name, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
for (; cur_index < num_items; cur_index++) {
ret = _mdns_service_subtype_add_for_host(s, subtype[cur_index].subtype);
if (ret == ESP_OK) {
continue;
}{...} else if (ret == ESP_ERR_NO_MEM) {
ESP_LOGE(TAG, "Out of memory");
goto err;
}{...} else {
ESP_LOGE(TAG, "Failed to add subtype: %s", subtype[cur_index].subtype);
goto exit;
}{...}
}{...}
_mdns_announce_all_pcbs(&s, 1, false);
err:
if (ret == ESP_ERR_NO_MEM) {
for (int idx = 0; idx < cur_index; idx++) {
_mdns_service_subtype_remove_for_host(s, subtype[idx].subtype);
}{...}
}{...}
exit:
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
esp_err_t mdns_service_subtype_add_for_host(const char *instance_name, const char *service_type, const char *proto,
const char *hostname, const char *subtype)
{
mdns_subtype_item_t _subtype[1];
_subtype[0].subtype = subtype;
return mdns_service_subtype_add_multiple_items_for_host(instance_name, service_type, proto, hostname, _subtype, 1);
}{ ... }
static mdns_subtype_t *_mdns_service_find_subtype_needed_sendbye(mdns_service_t *service, mdns_subtype_item_t subtype[],
uint8_t num_items)
{
if (!service) {
return NULL;
}{...}
mdns_subtype_t *current = service->subtype;
mdns_subtype_t *prev = NULL;
mdns_subtype_t *prev_goodbye = NULL;
mdns_subtype_t *out_goodbye_subtype = NULL;
while (current) {
bool subtype_in_update = false;
for (int i = 0; i < num_items; i++) {
if (strcmp(subtype[i].subtype, current->subtype) == 0) {
subtype_in_update = true;
break;
}{...}
}{...}
if (!subtype_in_update) {
if (prev) {
prev->next = current->next;
}{...} else {
service->subtype = current->next;
}{...}
mdns_subtype_t *to_move = current;
current = current->next;
to_move->next = NULL;
if (prev_goodbye) {
prev_goodbye->next = to_move;
}{...} else {
out_goodbye_subtype = to_move;
}{...}
prev_goodbye = to_move;
}{...} else {
prev = current;
current = current->next;
}{...}
}{...}
return out_goodbye_subtype;
}{ ... }
esp_err_t mdns_service_subtype_update_multiple_items_for_host(const char *instance_name, const char *service_type, const char *proto,
const char *hostname, mdns_subtype_item_t subtype[], uint8_t num_items)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
int cur_index = 0;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service_type) && !_str_null_or_empty(proto),
ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance_name, service_type, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
mdns_subtype_t *goodbye_subtype = _mdns_service_find_subtype_needed_sendbye(s->service, subtype, num_items);
if (goodbye_subtype) {
_mdns_send_bye_subtype(s, instance_name, goodbye_subtype);
}{...}
_mdns_free_subtype(goodbye_subtype);
_mdns_free_service_subtype(s->service);
for (; cur_index < num_items; cur_index++) {
ret = _mdns_service_subtype_add_for_host(s, subtype[cur_index].subtype);
if (ret == ESP_OK) {
continue;
}{...} else if (ret == ESP_ERR_NO_MEM) {
ESP_LOGE(TAG, "Out of memory");
goto err;
}{...} else {
ESP_LOGE(TAG, "Failed to add subtype: %s", subtype[cur_index].subtype);
goto exit;
}{...}
}{...}
if (num_items) {
_mdns_announce_all_pcbs(&s, 1, false);
}{...}
err:
if (ret == ESP_ERR_NO_MEM) {
for (int idx = 0; idx < cur_index; idx++) {
_mdns_service_subtype_remove_for_host(s, subtype[idx].subtype);
}{...}
}{...}
exit:
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
esp_err_t mdns_service_instance_name_set_for_host(const char *instance_old, const char *service, const char *proto, const char *host,
const char *instance)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
const char *hostname = host ? host : _mdns_server->hostname;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto) &&
!_str_null_or_empty(instance) && strlen(instance) <= (MDNS_NAME_BUF_LEN - 1), ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance_old, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
if (s->service->instance) {
_mdns_send_bye(&s, 1, false);
mdns_mem_free((char *)s->service->instance);
}{...}
s->service->instance = mdns_mem_strndup(instance, MDNS_NAME_BUF_LEN - 1);
ESP_GOTO_ON_FALSE(s->service->instance, ESP_ERR_NO_MEM, err, TAG, "Out of memory");
_mdns_probe_all_pcbs(&s, 1, false, false);
err:
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
esp_err_t mdns_service_instance_name_set(const char *service, const char *proto, const char *instance)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_instance_name_set_for_host(NULL, service, proto, NULL, instance);
}{ ... }
esp_err_t mdns_service_remove_for_host(const char *instance, const char *service, const char *proto, const char *host)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
const char *hostname = host ? host : _mdns_server->hostname;
ESP_GOTO_ON_FALSE(_mdns_server && _mdns_server->services && !_str_null_or_empty(service) && !_str_null_or_empty(proto),
ESP_ERR_INVALID_ARG, err, TAG, "Invalid state or arguments");
mdns_srv_item_t *s = _mdns_get_service_item_instance(instance, service, proto, hostname);
ESP_GOTO_ON_FALSE(s, ESP_ERR_NOT_FOUND, err, TAG, "Service doesn't exist");
mdns_srv_item_t *a = _mdns_server->services;
mdns_srv_item_t *b = a;
if (instance) {
while (a) {
if (_mdns_service_match_instance(a->service, instance, service, proto, hostname)) {
if (_mdns_server->services != a) {
b->next = a->next;
}{...} else {
_mdns_server->services = a->next;
}{...}
_mdns_send_bye(&a, 1, false);
_mdns_remove_scheduled_service_packets(a->service);
_mdns_free_service(a->service);
mdns_mem_free(a);
break;
}{...}
b = a;
a = a->next;
}{...}
}{...} else {
while (a) {
if (_mdns_service_match(a->service, service, proto, hostname)) {
if (_mdns_server->services != a) {
b->next = a->next;
}{...} else {
_mdns_server->services = a->next;
}{...}
_mdns_send_bye(&a, 1, false);
_mdns_remove_scheduled_service_packets(a->service);
_mdns_free_service(a->service);
mdns_mem_free(a);
break;
}{...}
b = a;
a = a->next;
}{...}
}{...}
err:
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
esp_err_t mdns_service_remove(const char *service_type, const char *proto)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
return mdns_service_remove_for_host(NULL, service_type, proto, NULL);
}{ ... }
esp_err_t mdns_service_remove_all(void)
{
MDNS_SERVICE_LOCK();
esp_err_t ret = ESP_OK;
ESP_GOTO_ON_FALSE(_mdns_server, ESP_ERR_INVALID_ARG, done, TAG, "Invalid state");
if (!_mdns_server->services) {
goto done;
}{...}
_mdns_send_final_bye(false);
mdns_srv_item_t *services = _mdns_server->services;
_mdns_server->services = NULL;
while (services) {
mdns_srv_item_t *s = services;
services = services->next;
_mdns_remove_scheduled_service_packets(s->service);
_mdns_free_service(s->service);
mdns_mem_free(s);
}{...}
done:
MDNS_SERVICE_UNLOCK();
return ret;
}{ ... }
/* ... */
void mdns_query_results_free(mdns_result_t *results)
{
MDNS_SERVICE_LOCK();
_mdns_query_results_free(results);
MDNS_SERVICE_UNLOCK();
}{ ... }
static void _mdns_query_results_free(mdns_result_t *results)
{
mdns_result_t *r;
mdns_ip_addr_t *a;
while (results) {
r = results;
mdns_mem_free((char *)(r->hostname));
mdns_mem_free((char *)(r->instance_name));
mdns_mem_free((char *)(r->service_type));
mdns_mem_free((char *)(r->proto));
for (size_t i = 0; i < r->txt_count; i++) {
mdns_mem_free((char *)(r->txt[i].key));
mdns_mem_free((char *)(r->txt[i].value));
}{...}
mdns_mem_free(r->txt);
mdns_mem_free(r->txt_value_len);
while (r->addr) {
a = r->addr;
r->addr = r->addr->next;
mdns_mem_free(a);
}{...}
results = results->next;
mdns_mem_free(r);
}{...}
}{ ... }
esp_err_t mdns_query_async_delete(mdns_search_once_t *search)
{
if (!search) {
return ESP_ERR_INVALID_ARG;
}{...}
if (search->state != SEARCH_OFF) {
return ESP_ERR_INVALID_STATE;
}{...}
MDNS_SERVICE_LOCK();
_mdns_search_free(search);
MDNS_SERVICE_UNLOCK();
return ESP_OK;
}{ ... }
bool mdns_query_async_get_results(mdns_search_once_t *search, uint32_t timeout, mdns_result_t **results, uint8_t *num_results)
{
if (xSemaphoreTake(search->done_semaphore, pdMS_TO_TICKS(timeout)) == pdTRUE) {
if (results) {
*results = search->result;
}{...}
if (num_results) {
*num_results = search->num_results;
}{...}
return true;
}{...}
return false;
}{ ... }
mdns_search_once_t *mdns_query_async_new(const char *name, const char *service, const char *proto, uint16_t type,
uint32_t timeout, size_t max_results, mdns_query_notify_t notifier)
{
mdns_search_once_t *search = NULL;
if (!_mdns_server || !timeout || _str_null_or_empty(service) != _str_null_or_empty(proto)) {
return NULL;
}{...}
search = _mdns_search_init(name, service, proto, type, type != MDNS_TYPE_PTR, timeout, max_results, notifier);
if (!search) {
return NULL;
}{...}
if (_mdns_send_search_action(ACTION_SEARCH_ADD, search)) {
_mdns_search_free(search);
return NULL;
}{...}
return search;
}{ ... }
esp_err_t mdns_query_generic(const char *name, const char *service, const char *proto, uint16_t type, mdns_query_transmission_type_t transmission_type, uint32_t timeout, size_t max_results, mdns_result_t **results)
{
mdns_search_once_t *search = NULL;
*results = NULL;
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
if (!timeout || _str_null_or_empty(service) != _str_null_or_empty(proto)) {
return ESP_ERR_INVALID_ARG;
}{...}
search = _mdns_search_init(name, service, proto, type, transmission_type == MDNS_QUERY_UNICAST, timeout, max_results, NULL);
if (!search) {
return ESP_ERR_NO_MEM;
}{...}
if (_mdns_send_search_action(ACTION_SEARCH_ADD, search)) {
_mdns_search_free(search);
return ESP_ERR_NO_MEM;
}{...}
xSemaphoreTake(search->done_semaphore, portMAX_DELAY);
*results = search->result;
_mdns_search_free(search);
return ESP_OK;
}{ ... }
esp_err_t mdns_query(const char *name, const char *service_type, const char *proto, uint16_t type, uint32_t timeout, size_t max_results, mdns_result_t **results)
{
return mdns_query_generic(name, service_type, proto, type, type != MDNS_TYPE_PTR, timeout, max_results, results);
}{ ... }
esp_err_t mdns_query_ptr(const char *service, const char *proto, uint32_t timeout, size_t max_results, mdns_result_t **results)
{
if (_str_null_or_empty(service) || _str_null_or_empty(proto)) {
return ESP_ERR_INVALID_ARG;
}{...}
return mdns_query(NULL, service, proto, MDNS_TYPE_PTR, timeout, max_results, results);
}{ ... }
esp_err_t mdns_query_srv(const char *instance, const char *service, const char *proto, uint32_t timeout, mdns_result_t **result)
{
if (_str_null_or_empty(instance) || _str_null_or_empty(service) || _str_null_or_empty(proto)) {
return ESP_ERR_INVALID_ARG;
}{...}
return mdns_query(instance, service, proto, MDNS_TYPE_SRV, timeout, 1, result);
}{ ... }
esp_err_t mdns_query_txt(const char *instance, const char *service, const char *proto, uint32_t timeout, mdns_result_t **result)
{
if (_str_null_or_empty(instance) || _str_null_or_empty(service) || _str_null_or_empty(proto)) {
return ESP_ERR_INVALID_ARG;
}{...}
return mdns_query(instance, service, proto, MDNS_TYPE_TXT, timeout, 1, result);
}{ ... }
esp_err_t mdns_lookup_delegated_service(const char *instance, const char *service, const char *proto, size_t max_results,
mdns_result_t **result)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
if (!result || _str_null_or_empty(service) || _str_null_or_empty(proto)) {
return ESP_ERR_INVALID_ARG;
}{...}
MDNS_SERVICE_LOCK();
*result = _mdns_lookup_service(instance, service, proto, max_results, false);
MDNS_SERVICE_UNLOCK();
return ESP_OK;
}{ ... }
esp_err_t mdns_lookup_selfhosted_service(const char *instance, const char *service, const char *proto, size_t max_results,
mdns_result_t **result)
{
if (!_mdns_server) {
return ESP_ERR_INVALID_STATE;
}{...}
if (!result || _str_null_or_empty(service) || _str_null_or_empty(proto)) {
return ESP_ERR_INVALID_ARG;
}{...}
MDNS_SERVICE_LOCK();
*result = _mdns_lookup_service(instance, service, proto, max_results, true);
MDNS_SERVICE_UNLOCK();
return ESP_OK;
}{ ... }
#ifdef CONFIG_LWIP_IPV4
esp_err_t mdns_query_a(const char *name, uint32_t timeout, esp_ip4_addr_t *addr)
{
mdns_result_t *result = NULL;
esp_err_t err;
if (_str_null_or_empty(name)) {
return ESP_ERR_INVALID_ARG;
}{...}
if (strstr(name, ".local")) {
ESP_LOGW(TAG, "Please note that hostname must not contain domain name, as mDNS uses '.local' domain");
}{...}
err = mdns_query(name, NULL, NULL, MDNS_TYPE_A, timeout, 1, &result);
if (err) {
return err;
}{...}
if (!result) {
return ESP_ERR_NOT_FOUND;
}{...}
mdns_ip_addr_t *a = result->addr;
while (a) {
if (a->addr.type == ESP_IPADDR_TYPE_V4) {
addr->addr = a->addr.u_addr.ip4.addr;
mdns_query_results_free(result);
return ESP_OK;
}{...}
a = a->next;
}{...}
mdns_query_results_free(result);
return ESP_ERR_NOT_FOUND;
}{ ... }
/* ... */#endif
#ifdef CONFIG_LWIP_IPV6
esp_err_t mdns_query_aaaa(const char *name, uint32_t timeout, esp_ip6_addr_t *addr)
{
mdns_result_t *result = NULL;
esp_err_t err;
if (_str_null_or_empty(name)) {
return ESP_ERR_INVALID_ARG;
}{...}
if (strstr(name, ".local")) {
ESP_LOGW(TAG, "Please note that hostname must not contain domain name, as mDNS uses '.local' domain");
}{...}
err = mdns_query(name, NULL, NULL, MDNS_TYPE_AAAA, timeout, 1, &result);
if (err) {
return err;
}{...}
if (!result) {
return ESP_ERR_NOT_FOUND;
}{...}
mdns_ip_addr_t *a = result->addr;
while (a) {
if (a->addr.type == ESP_IPADDR_TYPE_V6) {
memcpy(addr->addr, a->addr.u_addr.ip6.addr, 16);
mdns_query_results_free(result);
return ESP_OK;
}{...}
a = a->next;
}{...}
mdns_query_results_free(result);
return ESP_ERR_NOT_FOUND;
}{ ... }
/* ... */#endif
#ifdef MDNS_ENABLE_DEBUG
void mdns_debug_packet(const uint8_t *data, size_t len)
{
static mdns_name_t n;
mdns_header_t header;
const uint8_t *content = data + MDNS_HEAD_LEN;
uint32_t t = xTaskGetTickCount() * portTICK_PERIOD_MS;
mdns_name_t *name = &n;
memset(name, 0, sizeof(mdns_name_t));
_mdns_dbg_printf("Packet[%" PRIu32 "]: ", t);
header.id = _mdns_read_u16(data, MDNS_HEAD_ID_OFFSET);
header.flags = _mdns_read_u16(data, MDNS_HEAD_FLAGS_OFFSET);
header.questions = _mdns_read_u16(data, MDNS_HEAD_QUESTIONS_OFFSET);
header.answers = _mdns_read_u16(data, MDNS_HEAD_ANSWERS_OFFSET);
header.servers = _mdns_read_u16(data, MDNS_HEAD_SERVERS_OFFSET);
header.additional = _mdns_read_u16(data, MDNS_HEAD_ADDITIONAL_OFFSET);
_mdns_dbg_printf("%s",
(header.flags == MDNS_FLAGS_QR_AUTHORITATIVE) ? "AUTHORITATIVE\n" :
(header.flags == MDNS_FLAGS_DISTRIBUTED) ? "DISTRIBUTED\n" :
(header.flags == 0) ? "\n" : " "
);
if (header.flags && header.flags != MDNS_FLAGS_QR_AUTHORITATIVE) {
_mdns_dbg_printf("0x%04X\n", header.flags);
}{...}
if (header.questions) {
uint8_t qs = header.questions;
while (qs--) {
content = _mdns_parse_fqdn(data, content, name, len);
if (!content || content + MDNS_CLASS_OFFSET + 1 >= data + len) {
header.answers = 0;
header.additional = 0;
header.servers = 0;
_mdns_dbg_printf("ERROR: parse header questions\n");
break;
}{...}
uint16_t type = _mdns_read_u16(content, MDNS_TYPE_OFFSET);
uint16_t mdns_class = _mdns_read_u16(content, MDNS_CLASS_OFFSET);
bool unicast = !!(mdns_class & 0x8000);
mdns_class &= 0x7FFF;
content = content + 4;
_mdns_dbg_printf(" Q: ");
if (unicast) {
_mdns_dbg_printf("*U* ");
}{...}
if (type == MDNS_TYPE_PTR) {
_mdns_dbg_printf("%s.%s%s.%s.%s. PTR ", name->host, name->sub ? "_sub." : "", name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_SRV) {
_mdns_dbg_printf("%s.%s%s.%s.%s. SRV ", name->host, name->sub ? "_sub." : "", name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_TXT) {
_mdns_dbg_printf("%s.%s%s.%s.%s. TXT ", name->host, name->sub ? "_sub." : "", name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_A) {
_mdns_dbg_printf("%s.%s. A ", name->host, name->domain);
}{...} else if (type == MDNS_TYPE_AAAA) {
_mdns_dbg_printf("%s.%s. AAAA ", name->host, name->domain);
}{...} else if (type == MDNS_TYPE_NSEC) {
_mdns_dbg_printf("%s.%s%s.%s.%s. NSEC ", name->host, name->sub ? "_sub." : "", name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_ANY) {
_mdns_dbg_printf("%s.%s%s.%s.%s. ANY ", name->host, name->sub ? "_sub." : "", name->service, name->proto, name->domain);
}{...} else {
_mdns_dbg_printf("%s.%s%s.%s.%s. %04X ", name->host, name->sub ? "_sub." : "", name->service, name->proto, name->domain, type);
}{...}
if (mdns_class == 0x0001) {
_mdns_dbg_printf("IN");
}{...} else {
_mdns_dbg_printf("%04X", mdns_class);
}{...}
_mdns_dbg_printf("\n");
}{...}
}{...}
if (header.answers || header.servers || header.additional) {
uint16_t recordIndex = 0;
while (content < (data + len)) {
content = _mdns_parse_fqdn(data, content, name, len);
if (!content) {
_mdns_dbg_printf("ERROR: parse mdns records\n");
break;
}{...}
uint16_t type = _mdns_read_u16(content, MDNS_TYPE_OFFSET);
uint16_t mdns_class = _mdns_read_u16(content, MDNS_CLASS_OFFSET);
uint32_t ttl = _mdns_read_u32(content, MDNS_TTL_OFFSET);
uint16_t data_len = _mdns_read_u16(content, MDNS_LEN_OFFSET);
const uint8_t *data_ptr = content + MDNS_DATA_OFFSET;
bool flush = !!(mdns_class & 0x8000);
mdns_class &= 0x7FFF;
content = data_ptr + data_len;
if (content > (data + len)) {
_mdns_dbg_printf("ERROR: content length overflow\n");
break;
}{...}
mdns_parsed_record_type_t record_type = MDNS_ANSWER;
if (recordIndex >= (header.answers + header.servers)) {
record_type = MDNS_EXTRA;
}{...} else if (recordIndex >= (header.answers)) {
record_type = MDNS_NS;
}{...}
recordIndex++;
if (record_type == MDNS_EXTRA) {
_mdns_dbg_printf(" X");
}{...} else if (record_type == MDNS_NS) {
_mdns_dbg_printf(" S");
}{...} else {
_mdns_dbg_printf(" A");
}{...}
if (type == MDNS_TYPE_PTR) {
_mdns_dbg_printf(": %s%s%s.%s.%s. PTR ", name->host, name->host[0] ? "." : "", name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_SRV) {
_mdns_dbg_printf(": %s.%s.%s.%s. SRV ", name->host, name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_TXT) {
_mdns_dbg_printf(": %s.%s.%s.%s. TXT ", name->host, name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_A) {
_mdns_dbg_printf(": %s.%s. A ", name->host, name->domain);
}{...} else if (type == MDNS_TYPE_AAAA) {
_mdns_dbg_printf(": %s.%s. AAAA ", name->host, name->domain);
}{...} else if (type == MDNS_TYPE_NSEC) {
_mdns_dbg_printf(": %s.%s.%s.%s. NSEC ", name->host, name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_ANY) {
_mdns_dbg_printf(": %s.%s.%s.%s. ANY ", name->host, name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_OPT) {
_mdns_dbg_printf(": . OPT ");
}{...} else {
_mdns_dbg_printf(": %s.%s.%s.%s. %04X ", name->host, name->service, name->proto, name->domain, type);
}{...}
if (mdns_class == 0x0001) {
_mdns_dbg_printf("IN ");
}{...} else {
_mdns_dbg_printf("%04X ", mdns_class);
}{...}
if (flush) {
_mdns_dbg_printf("FLUSH ");
}{...}
_mdns_dbg_printf("%" PRIu32, ttl);
_mdns_dbg_printf("[%u] ", data_len);
if (type == MDNS_TYPE_PTR) {
if (!_mdns_parse_fqdn(data, data_ptr, name, len)) {
_mdns_dbg_printf("ERROR: parse PTR\n");
continue;
}{...}
_mdns_dbg_printf("%s.%s.%s.%s.\n", name->host, name->service, name->proto, name->domain);
}{...} else if (type == MDNS_TYPE_SRV) {
if (!_mdns_parse_fqdn(data, data_ptr + MDNS_SRV_FQDN_OFFSET, name, len)) {
_mdns_dbg_printf("ERROR: parse SRV\n");
continue;
}{...}
uint16_t priority = _mdns_read_u16(data_ptr, MDNS_SRV_PRIORITY_OFFSET);
uint16_t weight = _mdns_read_u16(data_ptr, MDNS_SRV_WEIGHT_OFFSET);
uint16_t port = _mdns_read_u16(data_ptr, MDNS_SRV_PORT_OFFSET);
_mdns_dbg_printf("%u %u %u %s.%s.\n", priority, weight, port, name->host, name->domain);
}{...} else if (type == MDNS_TYPE_TXT) {
uint16_t i = 0, y;
while (i < data_len) {
uint8_t partLen = data_ptr[i++];
if ((i + partLen) > data_len) {
_mdns_dbg_printf("ERROR: parse TXT\n");
break;
}{...}
char txt[partLen + 1];
for (y = 0; y < partLen; y++) {
char d = data_ptr[i++];
txt[y] = d;
}{...}
txt[partLen] = 0;
_mdns_dbg_printf("%s", txt);
if (i < data_len) {
_mdns_dbg_printf("; ");
}{...}
}{...}
_mdns_dbg_printf("\n");
}{...} else if (type == MDNS_TYPE_AAAA) {
esp_ip6_addr_t ip6;
memcpy(&ip6, data_ptr, sizeof(esp_ip6_addr_t));
_mdns_dbg_printf(IPV6STR "\n", IPV62STR(ip6));
}{...} else if (type == MDNS_TYPE_A) {
esp_ip4_addr_t ip;
memcpy(&ip, data_ptr, sizeof(esp_ip4_addr_t));
_mdns_dbg_printf(IPSTR "\n", IP2STR(&ip));
}{...} else if (type == MDNS_TYPE_NSEC) {
const uint8_t *old_ptr = data_ptr;
const uint8_t *new_ptr = _mdns_parse_fqdn(data, data_ptr, name, len);
if (new_ptr) {
_mdns_dbg_printf("%s.%s.%s.%s. ", name->host, name->service, name->proto, name->domain);
size_t diff = new_ptr - old_ptr;
data_len -= diff;
data_ptr = new_ptr;
}{...}
size_t i;
for (i = 0; i < data_len; i++) {
_mdns_dbg_printf(" %02x", data_ptr[i]);
}{...}
_mdns_dbg_printf("\n");
}{...} else if (type == MDNS_TYPE_OPT) {
uint16_t opCode = _mdns_read_u16(data_ptr, 0);
uint16_t opLen = _mdns_read_u16(data_ptr, 2);
_mdns_dbg_printf(" Code: %04x Data[%u]:", opCode, opLen);
size_t i;
for (i = 4; i < data_len; i++) {
_mdns_dbg_printf(" %02x", data_ptr[i]);
}{...}
_mdns_dbg_printf("\n");
}{...} else {
size_t i;
for (i = 0; i < data_len; i++) {
_mdns_dbg_printf(" %02x", data_ptr[i]);
}{...}
_mdns_dbg_printf("\n");
}{...}
}{...}
}{...}
}{...}
/* ... */#endif
/* ... */
static esp_err_t _mdns_sync_browse_action(mdns_action_type_t type, mdns_browse_sync_t *browse_sync)
{
mdns_action_t *action = NULL;
action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
return ESP_ERR_NO_MEM;
}{...}
action->type = type;
action->data.browse_sync.browse_sync = browse_sync;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
/* ... */
static esp_err_t _mdns_send_browse_action(mdns_action_type_t type, mdns_browse_t *browse)
{
mdns_action_t *action = NULL;
action = (mdns_action_t *)mdns_mem_malloc(sizeof(mdns_action_t));
if (!action) {
HOOK_MALLOC_FAILED;
return ESP_ERR_NO_MEM;
}{...}
action->type = type;
action->data.browse_add.browse = browse;
if (xQueueSend(_mdns_server->action_queue, &action, (TickType_t)0) != pdPASS) {
mdns_mem_free(action);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
/* ... */
static void _mdns_browse_item_free(mdns_browse_t *browse)
{
mdns_mem_free(browse->service);
mdns_mem_free(browse->proto);
if (browse->result) {
_mdns_query_results_free(browse->result);
}{...}
mdns_mem_free(browse);
}{ ... }
/* ... */
static mdns_browse_t *_mdns_browse_init(const char *service, const char *proto, mdns_browse_notify_t notifier)
{
mdns_browse_t *browse = (mdns_browse_t *)mdns_mem_malloc(sizeof(mdns_browse_t));
if (!browse) {
HOOK_MALLOC_FAILED;
return NULL;
}{...}
memset(browse, 0, sizeof(mdns_browse_t));
browse->state = BROWSE_INIT;
if (!_str_null_or_empty(service)) {
browse->service = mdns_mem_strndup(service, MDNS_NAME_BUF_LEN - 1);
if (!browse->service) {
_mdns_browse_item_free(browse);
return NULL;
}{...}
}{...}
if (!_str_null_or_empty(proto)) {
browse->proto = mdns_mem_strndup(proto, MDNS_NAME_BUF_LEN - 1);
if (!browse->proto) {
_mdns_browse_item_free(browse);
return NULL;
}{...}
}{...}
browse->notifier = notifier;
return browse;
}{ ... }
mdns_browse_t *mdns_browse_new(const char *service, const char *proto, mdns_browse_notify_t notifier)
{
mdns_browse_t *browse = NULL;
if (!_mdns_server || _str_null_or_empty(service) || _str_null_or_empty(proto)) {
return NULL;
}{...}
browse = _mdns_browse_init(service, proto, notifier);
if (!browse) {
return NULL;
}{...}
if (_mdns_send_browse_action(ACTION_BROWSE_ADD, browse)) {
_mdns_browse_item_free(browse);
return NULL;
}{...}
return browse;
}{ ... }
esp_err_t mdns_browse_delete(const char *service, const char *proto)
{
mdns_browse_t *browse = NULL;
if (!_mdns_server || _str_null_or_empty(service) || _str_null_or_empty(proto)) {
return ESP_FAIL;
}{...}
browse = _mdns_browse_init(service, proto, NULL);
if (!browse) {
return ESP_ERR_NO_MEM;
}{...}
if (_mdns_send_browse_action(ACTION_BROWSE_END, browse)) {
_mdns_browse_item_free(browse);
return ESP_ERR_NO_MEM;
}{...}
return ESP_OK;
}{ ... }
/* ... */
static void _mdns_browse_finish(mdns_browse_t *browse)
{
browse->state = BROWSE_OFF;
mdns_browse_t *b = _mdns_server->browse;
mdns_browse_t *target_free = NULL;
while (b) {
if (strlen(b->service) == strlen(browse->service) && memcmp(b->service, browse->service, strlen(b->service)) == 0 &&
strlen(b->proto) == strlen(browse->proto) && memcmp(b->proto, browse->proto, strlen(b->proto)) == 0) {
target_free = b;
b = b->next;
queueDetach(mdns_browse_t, _mdns_server->browse, target_free);
_mdns_browse_item_free(target_free);
}{...} else {
b = b->next;
}{...}
}{...}
_mdns_browse_item_free(browse);
}{ ... }
/* ... */
static void _mdns_browse_add(mdns_browse_t *browse)
{
browse->state = BROWSE_RUNNING;
mdns_browse_t *queue = _mdns_server->browse;
bool found = false;
while (queue) {
if (strlen(queue->service) == strlen(browse->service) && memcmp(queue->service, browse->service, strlen(queue->service)) == 0 &&
strlen(queue->proto) == strlen(browse->proto) && memcmp(queue->proto, browse->proto, strlen(queue->proto)) == 0) {
found = true;
break;
}{...}
queue = queue->next;
}{...}
if (!found) {
browse->next = _mdns_server->browse;
_mdns_server->browse = browse;
}{...}
for (uint8_t interface_idx = 0; interface_idx < MDNS_MAX_INTERFACES; interface_idx++) {
_mdns_browse_send(browse, (mdns_if_t)interface_idx);
}{...}
if (found) {
_mdns_browse_item_free(browse);
}{...}
}{ ... }
/* ... */
static void _mdns_browse_send(mdns_browse_t *browse, mdns_if_t interface)
{
mdns_search_once_t search = {0};
search.instance = NULL;
search.service = browse->service;
search.proto = browse->proto;
search.type = MDNS_TYPE_PTR;
search.unicast = false;
search.result = NULL;
search.next = NULL;
for (uint8_t protocol_idx = 0; protocol_idx < MDNS_IP_PROTOCOL_MAX; protocol_idx++) {
_mdns_search_send_pcb(&search, interface, (mdns_ip_protocol_t)protocol_idx);
}{...}
}{ ... }
/* ... */
static esp_err_t _mdns_add_browse_result(mdns_browse_sync_t *sync_browse, mdns_result_t *r)
{
mdns_browse_result_sync_t *sync_r = sync_browse->sync_result;
while (sync_r) {
if (sync_r->result == r) {
break;
}{...}
sync_r = sync_r->next;
}{...}
if (!sync_r) {
mdns_browse_result_sync_t *new = (mdns_browse_result_sync_t *)mdns_mem_malloc(sizeof(mdns_browse_result_sync_t));
if (!new) {
HOOK_MALLOC_FAILED;
return ESP_ERR_NO_MEM;
}{...}
new->result = r;
new->next = sync_browse->sync_result;
sync_browse->sync_result = new;
}{...}
return ESP_OK;
}{ ... }
/* ... */
static void _mdns_browse_result_add_ip(mdns_browse_t *browse, const char *hostname, esp_ip_addr_t *ip,
mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl, mdns_browse_sync_t *out_sync_browse)
{
if (out_sync_browse->browse == NULL) {
return;
}{...} else {
if (out_sync_browse->browse != browse) {
return;
}{...}
}{...}
mdns_result_t *r = NULL;
mdns_ip_addr_t *r_a = NULL;
if (browse) {
r = browse->result;
while (r) {
if (r->ip_protocol == ip_protocol) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && !_str_null_or_empty(r->hostname) && !strcasecmp(hostname, r->hostname)) {
r_a = r->addr;
while (r_a) {
#ifdef CONFIG_LWIP_IPV4
if (r_a->addr.type == ip->type && r_a->addr.type == ESP_IPADDR_TYPE_V4 && r_a->addr.u_addr.ip4.addr == ip->u_addr.ip4.addr) {
break;
}{...}
#endif/* ... */
#ifdef CONFIG_LWIP_IPV6
if (r_a->addr.type == ip->type && r_a->addr.type == ESP_IPADDR_TYPE_V6 && !memcmp(r_a->addr.u_addr.ip6.addr, ip->u_addr.ip6.addr, 16)) {
break;
}{...}
#endif/* ... */
r_a = r_a->next;
}{...}
if (!r_a) {
mdns_ip_addr_t *a = NULL;
a = _mdns_result_addr_create_ip(ip);
if (!a) {
return;
}{...}
a->next = r->addr;
r->addr = a;
if (r->ttl != ttl) {
if (r->ttl == 0) {
r->ttl = ttl;
}{...} else {
_mdns_result_update_ttl(r, ttl);
}{...}
}{...}
if (_mdns_add_browse_result(out_sync_browse, r) != ESP_OK) {
return;
}{...}
break;
}{...}
}{...}
}{...}
r = r->next;
}{...}
}{...}
return;
}{ ... }
/* ... */
static mdns_browse_t *_mdns_browse_find_from(mdns_browse_t *b, mdns_name_t *name, uint16_t type, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
{
if (type != MDNS_TYPE_SRV && type != MDNS_TYPE_A && type != MDNS_TYPE_AAAA && type != MDNS_TYPE_TXT) {
return NULL;
}{...}
mdns_result_t *r = NULL;
while (b) {
if (type == MDNS_TYPE_SRV || type == MDNS_TYPE_TXT) {
if (strcasecmp(name->service, b->service)
|| strcasecmp(name->proto, b->proto)) {
b = b->next;
continue;
}{...}
return b;
}{...} else if (type == MDNS_TYPE_A || type == MDNS_TYPE_AAAA) {
r = b->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol && !_str_null_or_empty(r->hostname) && !strcasecmp(name->host, r->hostname)) {
return b;
}{...}
r = r->next;
}{...}
b = b->next;
continue;
}{...}
}{...}
return b;
}{ ... }
static bool is_txt_item_in_list(mdns_txt_item_t txt, uint8_t txt_value_len, mdns_txt_item_t *txt_list, uint8_t *txt_value_len_list, size_t txt_count)
{
for (size_t i = 0; i < txt_count; i++) {
if (strcmp(txt.key, txt_list[i].key) == 0) {
if (txt_value_len == txt_value_len_list[i] && memcmp(txt.value, txt_list[i].value, txt_value_len) == 0) {
return true;
}{...} else {
return false;
}{...}
}{...}
}{...}
return false;
}{ ... }
/* ... */
static void _mdns_browse_result_add_txt(mdns_browse_t *browse, const char *instance, const char *service, const char *proto,
mdns_txt_item_t *txt, uint8_t *txt_value_len, size_t txt_count, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol,
uint32_t ttl, mdns_browse_sync_t *out_sync_browse)
{
if (out_sync_browse->browse == NULL) {
return;
}{...} else {
if (out_sync_browse->browse != browse) {
return;
}{...}
}{...}
mdns_result_t *r = browse->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol &&
!_str_null_or_empty(r->instance_name) && !strcasecmp(instance, r->instance_name) &&
!_str_null_or_empty(r->service_type) && !strcasecmp(service, r->service_type) &&
!_str_null_or_empty(r->proto) && !strcasecmp(proto, r->proto)) {
bool should_update = false;
if (r->txt) {
if (txt_count != r->txt_count) {
should_update = true;
}{...} else {
for (size_t txt_index = 0; txt_index < txt_count; txt_index++) {
if (!is_txt_item_in_list(txt[txt_index], txt_value_len[txt_index], r->txt, r->txt_value_len, r->txt_count)) {
should_update = true;
break;
}{...}
}{...}
}{...}
for (size_t i = 0; i < r->txt_count; i++) {
mdns_mem_free((char *)(r->txt[i].key));
mdns_mem_free((char *)(r->txt[i].value));
}{...}
mdns_mem_free(r->txt);
mdns_mem_free(r->txt_value_len);
}{...}
r->txt = txt;
r->txt_value_len = txt_value_len;
r->txt_count = txt_count;
if (r->ttl != ttl) {
uint32_t previous_ttl = r->ttl;
if (r->ttl == 0) {
r->ttl = ttl;
}{...} else {
_mdns_result_update_ttl(r, ttl);
}{...}
if (previous_ttl != r->ttl) {
should_update = true;
}{...}
}{...}
if (should_update) {
if (_mdns_add_browse_result(out_sync_browse, r) != ESP_OK) {
return;
}{...}
}{...}
return;
}{...}
r = r->next;
}{...}
r = (mdns_result_t *)mdns_mem_malloc(sizeof(mdns_result_t));
if (!r) {
HOOK_MALLOC_FAILED;
goto free_txt;
}{...}
memset(r, 0, sizeof(mdns_result_t));
r->instance_name = mdns_mem_strdup(instance);
r->service_type = mdns_mem_strdup(service);
r->proto = mdns_mem_strdup(proto);
if (!r->instance_name || !r->service_type || !r->proto) {
mdns_mem_free(r->instance_name);
mdns_mem_free(r->service_type);
mdns_mem_free(r->proto);
mdns_mem_free(r);
return;
}{...}
r->txt = txt;
r->txt_value_len = txt_value_len;
r->txt_count = txt_count;
r->esp_netif = _mdns_get_esp_netif(tcpip_if);
r->ip_protocol = ip_protocol;
r->ttl = ttl;
r->next = browse->result;
browse->result = r;
_mdns_add_browse_result(out_sync_browse, r);
return;
free_txt:
for (size_t i = 0; i < txt_count; i++) {
mdns_mem_free((char *)(txt[i].key));
mdns_mem_free((char *)(txt[i].value));
}{...}
mdns_mem_free(txt);
mdns_mem_free(txt_value_len);
return;
}{ ... }
static esp_err_t _mdns_copy_address_in_previous_result(mdns_result_t *result_list, mdns_result_t *r)
{
while (result_list) {
if (!_str_null_or_empty(result_list->hostname) && !_str_null_or_empty(r->hostname) && !strcasecmp(result_list->hostname, r->hostname) &&
result_list->ip_protocol == r->ip_protocol && result_list->addr && !r->addr) {
r->addr = copy_address_list(result_list->addr);
if (!r->addr) {
return ESP_ERR_NO_MEM;
}{...}
break;
}{...} else {
result_list = result_list->next;
}{...}
}{...}
return ESP_OK;
}{ ... }
/* ... */
static void _mdns_browse_result_add_srv(mdns_browse_t *browse, const char *hostname, const char *instance, const char *service, const char *proto,
uint16_t port, mdns_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, uint32_t ttl, mdns_browse_sync_t *out_sync_browse)
{
if (out_sync_browse->browse == NULL) {
return;
}{...} else {
if (out_sync_browse->browse != browse) {
return;
}{...}
}{...}
mdns_result_t *r = browse->result;
while (r) {
if (r->esp_netif == _mdns_get_esp_netif(tcpip_if) && r->ip_protocol == ip_protocol &&
!_str_null_or_empty(r->instance_name) && !strcasecmp(instance, r->instance_name) &&
!_str_null_or_empty(r->service_type) && !strcasecmp(service, r->service_type) &&
!_str_null_or_empty(r->proto) && !strcasecmp(proto, r->proto)) {
if (_str_null_or_empty(r->hostname) || strcasecmp(hostname, r->hostname)) {
r->hostname = mdns_mem_strdup(hostname);
r->port = port;
if (!r->hostname) {
HOOK_MALLOC_FAILED;
return;
}{...}
if (!r->addr) {
esp_err_t err = _mdns_copy_address_in_previous_result(browse->result, r);
if (err == ESP_ERR_NO_MEM) {
return;
}{...}
}{...}
if (_mdns_add_browse_result(out_sync_browse, r) != ESP_OK) {
return;
}{...}
}{...}
if (r->ttl != ttl) {
uint32_t previous_ttl = r->ttl;
if (r->ttl == 0) {
r->ttl = ttl;
}{...} else {
_mdns_result_update_ttl(r, ttl);
}{...}
if (previous_ttl != r->ttl) {
if (_mdns_add_browse_result(out_sync_browse, r) != ESP_OK) {
return;
}{...}
}{...}
}{...}
return;
}{...}
r = r->next;
}{...}
r = (mdns_result_t *)mdns_mem_malloc(sizeof(mdns_result_t));
if (!r) {
HOOK_MALLOC_FAILED;
return;
}{...}
memset(r, 0, sizeof(mdns_result_t));
r->hostname = mdns_mem_strdup(hostname);
r->instance_name = mdns_mem_strdup(instance);
r->service_type = mdns_mem_strdup(service);
r->proto = mdns_mem_strdup(proto);
if (!r->hostname || !r->instance_name || !r->service_type || !r->proto) {
HOOK_MALLOC_FAILED;
mdns_mem_free(r->hostname);
mdns_mem_free(r->instance_name);
mdns_mem_free(r->service_type);
mdns_mem_free(r->proto);
mdns_mem_free(r);
return;
}{...}
r->port = port;
r->esp_netif = _mdns_get_esp_netif(tcpip_if);
r->ip_protocol = ip_protocol;
r->ttl = ttl;
r->next = browse->result;
browse->result = r;
_mdns_add_browse_result(out_sync_browse, r);
return;
}{ ... }
static void _mdns_browse_sync(mdns_browse_sync_t *browse_sync)
{
mdns_browse_t *browse = browse_sync->browse;
mdns_browse_result_sync_t *sync_result = browse_sync->sync_result;
while (sync_result) {
mdns_result_t *result = sync_result->result;
#ifdef MDNS_ENABLE_DEBUG
debug_printf_browse_result(result, browse_sync->browse);
#endif
browse->notifier(result);
if (result->ttl == 0) {
queueDetach(mdns_result_t, browse->result, result);
result->next = NULL;
mdns_query_results_free(result);
}{...}
sync_result = sync_result->next;
}{...}
}{ ... }
#ifdef MDNS_ENABLE_DEBUG
void _debug_printf_result(mdns_result_t *r_t)
{
mdns_ip_addr_t *r_a = NULL;
int addr_count = 0;
_mdns_dbg_printf("result esp_netif: %p\n", r_t->esp_netif);
_mdns_dbg_printf("result ip_protocol: %d\n", r_t->ip_protocol);
_mdns_dbg_printf("result hostname: %s\n", _str_null_or_empty(r_t->hostname) ? "NULL" : r_t->hostname);
_mdns_dbg_printf("result instance_name: %s\n", _str_null_or_empty(r_t->instance_name) ? "NULL" : r_t->instance_name);
_mdns_dbg_printf("result service_type: %s\n", _str_null_or_empty(r_t->service_type) ? "NULL" : r_t->service_type);
_mdns_dbg_printf("result proto: %s\n", _str_null_or_empty(r_t->proto) ? "NULL" : r_t->proto);
_mdns_dbg_printf("result port: %d\n", r_t->port);
_mdns_dbg_printf("result ttl: %" PRIu32 "\n", r_t->ttl);
for (int i = 0; i < r_t->txt_count; i++) {
_mdns_dbg_printf("result txt item%d, key: %s, value: %s\n", i, r_t->txt[i].key, r_t->txt[i].value);
}{...}
r_a = r_t->addr;
while (r_a) {
#ifdef CONFIG_LWIP_IPV4
if (r_a->addr.type == ESP_IPADDR_TYPE_V4) {
_mdns_dbg_printf("Addr%d: " IPSTR "\n", addr_count++, IP2STR(&r_a->addr.u_addr.ip4));
}{...}
/* ... */#endif
#ifdef CONFIG_LWIP_IPV6
if (r_a->addr.type == ESP_IPADDR_TYPE_V6) {
_mdns_dbg_printf("Addr%d: " IPV6STR "\n", addr_count++, IPV62STR(r_a->addr.u_addr.ip6));
}{...}
/* ... */#endif
r_a = r_a->next;
}{...}
}{...}
static void debug_printf_browse_result(mdns_result_t *r_t, mdns_browse_t *b_t)
{
_mdns_dbg_printf("----------------sync browse %s.%s result---------------\n", b_t->service, b_t->proto);
_mdns_dbg_printf("browse pointer: %p\n", b_t);
_debug_printf_result(r_t);
}{...}
static void debug_printf_browse_result_all(mdns_result_t *r_t)
{
int count = 0;
while (r_t) {
_mdns_dbg_printf("----------------result %d---------------\n", count++);
_debug_printf_result(r_t);
r_t = r_t->next;
}{...}
}{...}
/* ... */#endif