rio_experimentation

Experimentation with Win32 Registered I/O for UDP communication

All projects are tested and worked on Windows 11 (Version 10.0.22000.2057) with Visual studio 2022 (17.4.2).

Projects

Socket i/o	RIO with Events	Brief description
recv	recv_rio	Receive packets on UDP port 0x4321 from any IPv4 host
send	send_rio	Send packets UDP packets to loalhost:0x4321

Results

send_rio and recv_rio running

Tipps and Tricks

Common error numbers

Windows Sockets Error Codes

Code	Value	Description
WSAEINVAL	10022	An invalid argument was supplied.
WSAENOBUFS	10055	No buffer space available.

Lookup error number from WSAGetLastError()

There is a powerful windows on-board method available to look up windows error messages from numbers: net helpmsg <number>.

Usage

C:\> net helpmsg 10022
An invalid argument was supplied.

Links

• SAC-593T: New Techniques to Develop Low Latency Network Apps
• SAC-433T: Network acceleration and other NIC technologies for the data center