sendto : Resource temporarily unavailable (errno 11)

Question

I am having a problem with sendto.

I have a receiver who receives UPD packets with recvfrom and then replies to the sender using sendto.

Unfortunately, I am

Answer 1

If you have to set the socket to non-blocking, you can do it safely (and only?) using select:

select() and pselect() allow a program to monitor multiple file descriptors, waiting until one or more of the file descriptors become "ready" for some class of I/O operation (e.g., input possible). A file descriptor is considered ready if it is possible to perform the corresponding I/O operation (e.g., read(2)) without blocking.