I am trying to send an integer value from a server written in Python to a client written in C and when I convert the int value to htonl to send to the C like this:
size = bytes(socket.htonl(len(input)))
it returns this error: Protocol wrong type for socket for this line:
recv = connection.send(size)
How can I send an integer value over to the client in C in this way or is there an easier way?
In the future please provide all relevant information: python version, OS, backtrace, and, in this instance, the code that created the socket.
This article probably explains what is happening:
http://erickt.github.io/blog/2014/11/19/adventures-in-debugging-a-potential-osx-kernel-bug/
Which means you probably have a bug in your server and/or client code that causes the connection to be torn down at an inopportune moment.
send(). I was more or less parroting another stackoverflow answer that seemed relevant. However, digging deeper I think the real issue is a quirk of macOS. I've updated my answer.errno values originate inside the kernel, not in user space, and this is indeed a bug, not a 'poorly documented edge case.' It should have given EPIPE.errno.