On Wed, Sep 21, 2016 at 05:20:30PM -0700, Daniel Ellis wrote:
I've changed the underlying code to correctly call recv until all the data has been received, but I am curious as to what's going on under the hood that made this so sporadic (and a bit of a headache to track down). Any help would be appreciated!
Splitting and merging of chunks may happen anywhere in the pipeline between sending and receiving _applications_. Networking stacks of operation systems of endpoints, as well as of intermediate nodes, are free to do whatever they decide with these chunk boundaries, because these boundaries are not part of TCP connection user interface. Again, it is by design that you cannot rely on these boundaries. Just always read up to complete message if you are using TCP, or use something other than TCP - for example, UDP seems to preserve boundaries (however there is even more headache with UDP).