UDP buffer size configuration

[dpkoch]

Creating from comment by @RonaldEnsing on #1:

In addition, it is not clear to me why the buffer size is set to (effectively) 1024*1024 for UDP [2]. Why not set [1] to 1024*1024 (1048576) and [2] to socket_.set_option(udp::socket::receive_buffer_size(READ_BUFFER_SIZE)?

[1] https://github.com/dpkoch/async_comm/blob/master/include/async_comm/comm.h#L143
[2] https://github.com/dpkoch/async_comm/blob/master/src/udp.cpp#L88

[dpkoch]

Hi @RonaldEnsing, this is a really good question, and to be honest I'm not really sure why it's like that. I think the answer is that some of the example code I used as a starting point for this project did it that way, and I just kind of copied it over. I'm guessing the original reasoning is that UDP packets are bigger than serial packets due to the overhead, so this was a way of compensating for that fact while still using a single configuration variable?

I agree this can definitely be improved; I'll take a look at it. Thanks for bringing it to my attention!