Sometimes I seem to get 0, which means that all I got was a header, does that mean I should assume that I received a FIN and close that socket?
Thanks in advance!
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Sometimes I seem to get 0, which means that all I got was a header, does that mean I should assume that I received a FIN and close that socket?
Thanks in advance!
Yes. Zero means, generically, end-of-file. What “end of file” means depends on what kind of file descriptor you are using.
In the context of a TCP socket, the only way that I know of that you can read zero is if a FIN is received. By contrast, if a RST is received
read()would return-1witherrno == ECONNRESET.