// is called periodically to check for next version
LOCAL void ICACHE_FLASH_ATTR
fota_ticktock(fota_client_t *fota_client)
{
// connection
fota_client->conn = (struct espconn *)os_zalloc(sizeof(struct espconn));
fota_client->conn->reverse = (void*)fota_client;
fota_client->conn->type = ESPCONN_TCP;
fota_client->conn->state = ESPCONN_NONE;
// new tcp connection
fota_client->conn->proto.tcp = (esp_tcp *)os_zalloc(sizeof(esp_tcp));
fota_client->conn->proto.tcp->local_port = espconn_port();
fota_client->conn->proto.tcp->remote_port = fota_client->port;
// if ip address is provided, go ahead
if (UTILS_StrToIP(fota_client->host, &fota_client->conn->proto.tcp->remote_ip)) {
INFO("FOTA client: Connect to ip %s:%d\r\n", fota_client->host, fota_client->port);
// check for new version
start_esp_connect(fota_client->conn, FOTA_SECURE, get_version_connect_cb, get_version_disconnect_cb);
}
// else, use dns query to get ip address
else {
INFO("FOTA client: Connect to domain %s:%d\r\n", fota_client->host, fota_client->port);
espconn_gethostbyname(fota_client->conn,
fota_client->host,
(ip_addr_t *)(fota_client->conn->proto.tcp->remote_ip),
fota_dns_found);
}
}
LOCAL void ICACHE_FLASH_ATTR
fota_dns_found(const char *name, ip_addr_t *ipaddr, void *arg)
{
struct espconn *pespconn = (struct espconn *)arg;
if(ipaddr == NULL) {
INFO("DNS: Found, but got no ip\n");
((fota_client_t*)pespconn->reverse)->status = FOTA_IDLE;
return;
}
INFO("DNS: found ip %d.%d.%d.%d\n",
*((uint8 *) &ipaddr->addr),
*((uint8 *) &ipaddr->addr + 1),
*((uint8 *) &ipaddr->addr + 2),
*((uint8 *) &ipaddr->addr + 3));
if(ipaddr->addr != 0) {
os_memcpy(pespconn->proto.tcp->remote_ip, &ipaddr->addr, 4);
}
// check for new version
start_esp_connect(pespconn,
FOTA_SECURE,
get_version_connect_cb,
get_version_disconnect_cb,
get_version_recon_cb);
}
