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esp-who/components/modules/web/app_mdns.c

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/*
* ESPRESSIF MIT License
*
* Copyright (c) 2020 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
*
* Permission is hereby granted for use on ESPRESSIF SYSTEMS products only, in which case,
* it is free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <string.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_log.h"
#include "esp_wifi.h"
#include "esp_camera.h"
#include "mdns.h"
#include "who_camera.h"
static const char *TAG = "camera mdns";
static const char * service_name = "_esp-cam";
static const char * proto = "_tcp";
static mdns_result_t * found_cams = NULL;
static SemaphoreHandle_t query_lock = NULL;
static char iname[64];
static char hname[64];
static char framesize[4];
static char pixformat[4];
static const char * model = NULL;
static void mdns_query_for_cams()
{
mdns_result_t * new_cams = NULL;
esp_err_t err = mdns_query_ptr(service_name, proto, 5000, 4, &new_cams);
if(err){
ESP_LOGE(TAG, "MDNS Query Failed: %s", esp_err_to_name(err));
return;
}
xSemaphoreTake(query_lock, portMAX_DELAY);
if (found_cams != NULL) {
mdns_query_results_free(found_cams);
}
found_cams = new_cams;
xSemaphoreGive(query_lock);
}
static void mdns_task(void * arg)
{
for (;;) {
mdns_query_for_cams();
//delay 55 seconds
vTaskDelay((55 * 1000) / portTICK_PERIOD_MS);
}
vTaskDelete(NULL);
}
/*
* Public Functions
*/
const char * app_mdns_query(size_t * out_len)
{
//build JSON
static char json_response[2048];
char *p = json_response;
*p++ = '[';
//add own data first
tcpip_adapter_ip_info_t ip;
if (strlen(CONFIG_ESP_WIFI_SSID)) {
tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ip);
} else {
tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_AP, &ip);
}
*p++ = '{';
p += sprintf(p, "\"instance\":\"%s\",", iname);
p += sprintf(p, "\"host\":\"%s.local\",", hname);
p += sprintf(p, "\"port\":80,");
p += sprintf(p, "\"txt\":{");
p += sprintf(p, "\"pixformat\":\"%s\",", pixformat);
p += sprintf(p, "\"framesize\":\"%s\",", framesize);
p += sprintf(p, "\"stream_port\":\"81\",");
p += sprintf(p, "\"board\":\"%s\",", CAMERA_MODULE_NAME);
p += sprintf(p, "\"model\":\"%s\"", model);
*p++ = '}';
*p++ = ',';
p += sprintf(p, "\"ip\":\"" IPSTR "\",", IP2STR(&(ip.ip)));
p += sprintf(p, "\"id\":\"" IPSTR ":80\",", IP2STR(&(ip.ip)));
p += sprintf(p, "\"service\":\"%s\",", service_name);
p += sprintf(p, "\"proto\":\"%s\"", proto);
*p++ = '}';
xSemaphoreTake(query_lock, portMAX_DELAY);
if (found_cams) {
*p++ = ',';
}
mdns_result_t * r = found_cams;
mdns_ip_addr_t * a = NULL;
int t;
while(r){
*p++ = '{';
if(r->instance_name){
p += sprintf(p, "\"instance\":\"%s\",", r->instance_name);
}
if(r->hostname){
p += sprintf(p, "\"host\":\"%s.local\",", r->hostname);
p += sprintf(p, "\"port\":%u,", r->port);
}
if(r->txt_count){
p += sprintf(p, "\"txt\":{");
for(t=0; t<r->txt_count; t++){
if (t > 0) {
*p++ = ',';
}
p += sprintf(p, "\"%s\":\"%s\"", r->txt[t].key, r->txt[t].value?r->txt[t].value:"NULL");
}
*p++ = '}';
*p++ = ',';
}
a = r->addr;
while(a){
if(a->addr.type != IPADDR_TYPE_V6){
p += sprintf(p, "\"ip\":\"" IPSTR "\",", IP2STR(&(a->addr.u_addr.ip4)));
p += sprintf(p, "\"id\":\"" IPSTR ":%u\",", IP2STR(&(a->addr.u_addr.ip4)), r->port);
break;
}
a = a->next;
}
p += sprintf(p, "\"service\":\"%s\",", service_name);
p += sprintf(p, "\"proto\":\"%s\"", proto);
*p++ = '}';
r = r->next;
if (r) {
*p++ = ',';
}
}
xSemaphoreGive(query_lock);
*p++ = ']';
*out_len = (uint32_t)p - (uint32_t)json_response;
*p++ = '\0';
ESP_LOGI(TAG, "JSON: %uB", *out_len);
return (const char *)json_response;
}
void app_mdns_update_framesize(int size)
{
snprintf(framesize, 4, "%d", size);
if(mdns_service_txt_item_set(service_name, proto, "framesize", (char*)framesize)){
ESP_LOGE(TAG, "mdns_service_txt_item_set() framesize Failed");
}
}
void app_mdns_main()
{
uint8_t mac[6];
query_lock = xSemaphoreCreateBinary();
if (query_lock == NULL) {
ESP_LOGE(TAG, "xSemaphoreCreateMutex() Failed");
return;
}
xSemaphoreGive(query_lock);
sensor_t * s = esp_camera_sensor_get();
if(s == NULL){
return;
}
switch(s->id.PID){
case OV2640_PID: model = "OV2640"; break;
case OV3660_PID: model = "OV3660"; break;
case OV5640_PID: model = "OV5640"; break;
case OV7725_PID: model = "OV7725"; break;
default: model = "UNKNOWN"; break;
}
if (strlen(CONFIG_ESP_HOST_NAME) > 0) {
snprintf(iname, 64, "%s", CONFIG_ESP_HOST_NAME);
} else {
if (esp_read_mac(mac, ESP_MAC_WIFI_STA) != ESP_OK) {
ESP_LOGE(TAG, "esp_read_mac() Failed");
return;
}
snprintf(iname, 64, "%s-%s-%02X%02X%02X", CAMERA_MODULE_NAME, model, mac[3], mac[4], mac[5]);
}
snprintf(framesize, 4, "%d", s->status.framesize);
snprintf(pixformat, 4, "%d", s->pixformat);
char * src = iname, * dst = hname, c;
while (*src) {
c = *src++;
if (c >= 'A' && c <= 'Z') {
c -= 'A' - 'a';
}
*dst++ = c;
}
*dst++ = '\0';
if(mdns_init() != ESP_OK){
ESP_LOGE(TAG, "mdns_init() Failed");
return;
}
if(mdns_hostname_set(hname) != ESP_OK){
ESP_LOGE(TAG, "mdns_hostname_set(\"%s\") Failed", hname);
return;
}
if(mdns_instance_name_set(iname) != ESP_OK){
ESP_LOGE(TAG, "mdns_instance_name_set(\"%s\") Failed", iname);
return;
}
if(mdns_service_add(NULL, "_http", "_tcp", 80, NULL, 0) != ESP_OK){
ESP_LOGE(TAG, "mdns_service_add() HTTP Failed");
return;
}
mdns_txt_item_t camera_txt_data[] = {
{(char*)"board" ,(char*)CAMERA_MODULE_NAME},
{(char*)"model" ,(char*)model},
{(char*)"stream_port" ,(char*)"81"},
{(char*)"framesize" ,(char*)framesize},
{(char*)"pixformat" ,(char*)pixformat}
};
if(mdns_service_add(NULL, service_name, proto, 80, camera_txt_data, 5)) {
ESP_LOGE(TAG, "mdns_service_add() ESP-CAM Failed");
return;
}
xTaskCreate(mdns_task, "mdns-cam", 2048, NULL, 2, NULL);
}
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