Is CRC needed in sockets communications?

[colttaylor]

I'm coding a remote reporting tool which collects several hundred lines of text and then periodically sends them through a winsock connection to another "collecting" application. My question is...

Should I implement a CRC checksum on each line to assure that it gets to the collecting application without being mangled? Or is checksum-like data protection something which is built in to ip communications?

Thanks for your future assistance,
Peace,
Colt. If it's stupid but it works, it isn't stupid

 

[pansophic]

A CRC is generated automatically by TCP, but it is for the entire payload. Generating a CRC for each line of a multi-line payload would be a waste of bandwidth, because if the packet has an error, the entire packet will be rejected and a resend requested.
pansophic