How to test: I go to my modem interface and I disconnect the adsl client for some seconds and then re-connect it again, after some seconds the google socket fails to send/reopen resulting on an internet connectivity failed event. Thus the network controller fully destroys the mbedtls, waits for the internet (google socket) and then re-connects the mbedtls again, so between each internet disconnection/re-connection I see a memory leak of about 400 bytes. NOTE: When I disconnect the wifi interface and reconnect it again, most of the memory leak is gone. The leak is related to the mbedtls or lwip.
I'm using the mbedtls-rtos-example code:
https://github.com/espressif/esp8266-rt ... edtls_demo
This is the code used for the internet connection test:
Code: Select all
#define SOCKET_HOST ( ( const char * ) "google.com" )
#define SOCKET_PORT ( ( uint8 ) 80 )
static int socket_fd = -1;
static bool internetStatus = false;
LOCAL bool host2addr(const char *hostname , struct in_addr *in) {
struct addrinfo hints, *servinfo, *p;
struct sockaddr_in *h;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
if (lwip_getaddrinfo(hostname, 0 , &hints , &servinfo) != 0)
{
return false;
}
//loop through all the results and get the first resolve
for (p = servinfo; p != 0; p = p->ai_next)
{
h = (struct sockaddr_in *)p->ai_addr;
in->s_addr = h->sin_addr.s_addr;
}
lwip_freeaddrinfo(servinfo);
return true;
}
LOCAL bool openGoogleSocket() {
//create lwip TCP socket
socket_fd = lwip_socket(AF_INET, SOCK_STREAM, 0);
if( socket_fd != 0 )
{
IOT_ERROR("lwip_socket failed");
lwip_close(socket_fd);
internetStatus = false;
return false;
}
//set socket force close
lwip_force_close_set(1);
//set TCP socket keepAlive
uint32 opt = 0;
opt = 1;
if(lwip_setsockopt(socket_fd, SOL_SOCKET, SO_KEEPALIVE, &opt, sizeof(opt)) != 0) {
IOT_ERROR("lwip_setsockop SO_KEEPALIVE failed");
lwip_close(socket_fd);
internetStatus = false;
return false;
}
//set socket timeout
opt = 10000;
if(lwip_setsockopt(socket_fd, SOL_SOCKET, SO_RCVTIMEO, &opt, sizeof(opt)) != 0) {
IOT_ERROR("lwip_setsockop SO_RCVTIMEO failed");
lwip_close(socket_fd);
internetStatus = false;
return false;
}
//try to connect to google.com:80
struct sockaddr_in addr;
if (!host2addr(SOCKET_HOST, &(addr.sin_addr)))
{
IOT_ERROR("Invalid SOCKET_HOST: %s", SOCKET_HOST);
lwip_close(socket_fd);
internetStatus = false;
return false;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(SOCKET_PORT);
if( lwip_connect(socket_fd, (struct sockaddr*)&addr, sizeof(addr)) != 0 )
{
IOT_ERROR("lwip_connect failed");
lwip_close(socket_fd);
internetStatus = false;
return false;
}
internetStatus = true;
return true;
}
LOCAL void closeGoogleSocket() {
lwip_force_close_set(1);
lwip_close(socket_fd);
}
bool isInternetConnected() {
if(!physicalStatus) {
internetStatus = false;
return false;
}
int error = 0;
socklen_t len = sizeof (error);
int retval = lwip_getsockopt (socket_fd, SOL_SOCKET, SO_ERROR, &error, &len);
if (retval != 0) {
/* there was a problem getting the error code */
IOT_ERROR("lwip_getsockopt SO_ERROR failed");
internetStatus = false;
return false;
}
if (error != 0) {
/* socket has a non zero error status */
IOT_ERROR("%d", error);
internetStatus = false;
return false;
}
/* write p */
if(lwip_write(socket_fd, "p", 1) != 1) {
internetStatus = false;
return false;
}
internetStatus = true;
return true;
}OBS: The RTOS_SDK mbedtls library "net" is using the original net.c file from ESP8266_RTOS_SDK\third_party\mbedtls\library, while the NON_OS is using the "espconn_mebdtls.c" wrapper that uses lwip behind. The RTOS_SDK mbedtls shouldn't be using the "espconn" wrapper instead of the original net file?
Thank you
Regards
