[Bug] tcprewrite alters the Source and Destination MAC addresses when not required.

[goolje]

I have a large number of PCAPs which I use for automated testing. For security reasons, the Source and Destination IP addresses are changed (with a seed) before sending with tcpreplay. The seed is the same every time so that the output addresses are the same each time.
This was working fine up until recently. Now, when the PCAP is fuzzed with tcprewrite, the Source and Destination MAC addresses also sometimes change (but not always):
Input: "SourceMACAddress":"66:77:88:99:aa:bb","DestinationMACAddress":"00:11:22:33:44:55"
Output: "SourceMACAddress":"01:00:5e:99:aa:bb","DestinationMACAddress":"01:00:5e:33:44:55"

It means hundreds of tests fail because the Output no longer matches the Expected Output.

I'd attach an example PCAP, but I can't see where I can do that.

Oracle Linux Server 9.1
tcpreplay version 4.4.3

[fklassen]

You can attach a cap file by dragging it into the dialog, however it cannot have a .cap or .pcap extention. Many remove the extention, or gzip to get a .gz extension, or zip it to give it .zip extention. Then GitHub will accept it.

I may not be able to get it into 4.4.4 unless you get the sample to me. Please write up a full bug report so I know version, OS, exact command-line etc.