TCP server crash when calling tcp_output or tcp_nagle_disable

[MisterBot]

Hi,

My ESP32 crashs when i call tcp_output() to flush after calling write.
I tried using tcp_nagle_disable() but it also crashs.
What i want to achieve is to send small data from tcp server on ESP32 to PC without the 200ms delay.
any help ?

This is my test code:

Code: Select all

void TcpServerTask(void *pvParam)
{
	int64_t tmr = esp_timer_get_time();
	char DataBuffer[1];
	struct sockaddr_in tcpServerAddr, remote_addr;
   	 unsigned int socklen = sizeof(remote_addr);
    	tcpServerAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    	tcpServerAddr.sin_family = AF_INET;
    	tcpServerAddr.sin_port = htons(3000);
	int s = socket(AF_INET, SOCK_STREAM, 0);
	if (s < 0) {/*error allocating socket */}
	int i = 1;
	lwip_ioctl(s, FIONBIO, &i);
	if (bind(s, (struct sockaddr *)&tcpServerAddr, sizeof(tcpServerAddr)) != 0)	close(s);
	if (listen (s, 2) != 0) close(s);
    	int CurrentSocket = -1;
	while (CurrentSocket < 0) CurrentSocket = accept(s,(struct sockaddr *)&remote_addr, &socklen);
	fcntl(CurrentSocket,F_SETFL,O_NONBLOCK);
	//tcp_nagle_disable((tcp_pcb*)CurrentSocket);
	while (true)
	{
		if ((esp_timer_get_time() - tmr) > 25000) // send every 25ms
		{
			tmr = esp_timer_get_time();
			write(CurrentSocket, DataBuffer, 1);
			//tcp_output((tcp_pcb*)CurrentSocket);
		}
		vTaskDelay(1);
	}
}