[Asterisk-Dev] RTP not sending UDP checksums?

[Roy Sigurd Karlsbakk]

>> This is a possibility, there are a decent number of hardware 
>> supported offload engines built into ethernet cards 
>> nowadays....though I don't know how many support UDP...but if yours 
>> does then you could end up without UDP checksums until it actually 
>> goes out on the wire.
>
> Very true... nearly every decent Ethernet card nowadays does IP 
> checksums on its own, many of them probably do UDP checksums as well.

In linux, the only way to have the kernel offload IP/TCP checksumming 
to the NIC is to use the sendfile() call. AFAIK there's no possibility 
to have the kernel offload any UDP checksumming to the NIC

roy