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#include "mdns_service.h"
#include <stdio.h>
#include <string.h>
#include "esp_check.h"
#include "esp_log.h"
#include "mdns.h"
#include "viewport_state.h"
static const char *TAG = "mdns";
static const char *SERVICE = "_scrypted-viewport";
static const char *PROTO = "_tcp";
static const uint16_t PORT = 80;
// Pull the current hostname + TXT values from viewport_state under the lock.
static void snapshot_state(char *hostname, size_t host_cap,
const char **resolution,
const char **orientation,
char *name, size_t name_cap)
{
viewport_state_lock();
viewport_state_t *st = viewport_state_get();
if (st->viewport_name[0]) {
snprintf(hostname, host_cap, "viewport-%s", st->viewport_name);
} else {
snprintf(hostname, host_cap, "viewport");
}
*resolution = viewport_state_resolution_str();
*orientation = (st->orientation == VIEWPORT_ORIENTATION_PORTRAIT)
? "portrait" : "landscape";
snprintf(name, name_cap, "%s", st->viewport_name[0] ? st->viewport_name : "");
viewport_state_unlock();
}
static esp_err_t apply_hostname(void)
{
char hostname[80];
const char *resolution, *orientation;
char name[64];
snapshot_state(hostname, sizeof(hostname),
&resolution, &orientation,
name, sizeof(name));
return mdns_hostname_set(hostname);
}
static esp_err_t apply_txt(void)
{
char hostname[80];
const char *resolution, *orientation;
char name[64];
snapshot_state(hostname, sizeof(hostname),
&resolution, &orientation,
name, sizeof(name));
mdns_txt_item_t txt[] = {
{ "version", VIEWPORT_VERSION },
{ "resolution", resolution },
{ "orientation", orientation },
{ "name", name },
};
return mdns_service_txt_set(SERVICE, PROTO, txt,
sizeof(txt) / sizeof(txt[0]));
}
esp_err_t mdns_service_start(void)
{
// Order matters: mdns_service_add() rejects with INVALID_ARG if the
// hostname isn't set yet. So: init -> hostname -> service_add -> TXT.
ESP_RETURN_ON_ERROR(mdns_init(), TAG, "mdns_init");
ESP_RETURN_ON_ERROR(apply_hostname(), TAG, "hostname_set");
ESP_RETURN_ON_ERROR(
mdns_service_add(NULL, SERVICE, PROTO, PORT, NULL, 0),
TAG, "service_add");
ESP_RETURN_ON_ERROR(apply_txt(), TAG, "txt_set");
char hostname[80];
const char *resolution, *orientation;
char name[64];
snapshot_state(hostname, sizeof(hostname),
&resolution, &orientation,
name, sizeof(name));
ESP_LOGI(TAG, "mDNS up — %s.local advertising %s.%s.local on :%u",
hostname, SERVICE, PROTO, PORT);
return ESP_OK;
}
esp_err_t mdns_service_refresh(void)
{
ESP_RETURN_ON_ERROR(apply_hostname(), TAG, "hostname_set");
return apply_txt();
}
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