Network netconn_recv() hangs after multiple requests

[mparnis23]

I have the following FreeRTOS task that processes TCP connection requests. It is hanging randomly. After debugging I found that the netconn_recv function is no longer receiving the requests and blocks, even when there is data to be processed.

Does anyone have any idea what could be causing the issue.

Code: Select all

#define TCP_BUF_LEN 1024

void networkTask(void)
{
    uint16_t receivebuf_len = 0;
    char receivebuf[TCP_BUF_LEN] = {0};
    char transmitbuf[TCP_BUF_LEN] = {0};

    struct netconn* conn = globalScope.conn;
    struct netbuf *inbuf;
    err_t err = ERR_OK;

    while(err == ERR_OK)
    {
        // read request
        err = netconn_recv(conn, &inbuf);
        if(err != ERR_OK)
        {
            ESP_LOGE(TAG, "error");
            break;
        }
        receivebuf_len = netbuf_copy(inbuf, receivebuf, TCP_BUF_LEN);
        processRequest(receivebuf, receivebuf_len);

        // write response
        processResponse(transmitbuf);
        netconn_write(conn, transmitbuf, strlen(transmitbuf), NETCONN_COPY);

        netbuf_free(inbuf);
        netbuf_delete(inbuf);

        vTaskDelay(10);
    }

    netconn_close(conn);
	netconn_delete(conn);
}