ESP32 Forum

Posted: **Fri Nov 01, 2019 7:04 am**

hi, i am using TCP socket for multiple connection,
i want to use non blocking recv call, i tried using

fcntl(connect_socket, F_SETFL, O_NONBLOCK); /* Change the socket into non-blocking state	*/

function after

Code: Select all

connect_socket = accept(server_socket, (struct sockaddr *)&client_addr, &socklen);

but i dont see any change in recv call, it blocks the function and i receive both continuous data from 2 socket instance/client.
how to receive data from tcp socket without blocking the call ? incase i have multiple socket connection i need to be non blocking.

need help in this

regards
Sushant

Posted: **Fri Nov 01, 2019 9:05 am**

Not an answer to your question, but the canonical way to handle multiple sockets is to use one select() call on all of them, then handle whichever becomes active.

Posted: **Sat Nov 02, 2019 11:23 am**

ESP_Sprite wrote: ↑
Fri Nov 01, 2019 9:05 am
Not an answer to your question, but the canonical way to handle multiple sockets is to use one select() call on all of them, then handle whichever becomes active.

thanks for your input i have read and tried implementing select ,
it works

ESP32 Forum

is there code for non blocking TCP recv call ?

is there code for non blocking TCP recv call ?

Re: is there code for non blocking TCP recv call ?

Re: is there code for non blocking TCP recv call ?