Commits on Oct 28, 2024

1. Implement ECS address override feature …

   This commit implements an EDNS Client Subnet address
   override feature. It is controlled by two newly introduced
   config options `client-subnet-address-override-ipv4` and
   `client-subnet-address-override-ipv6`. If set, when a query is initiated
   by Unbound using the ECS option, the override address value specified
   in the config will be substituted and used instead of the original value
   calculated from the client's actual source address.
   
   This can be useful in certain situations where the original ECS address
   value doesn't make sense. E.g., it's generally not useful to send ECS
   queries to nameservers on the Internet using RFC 1918 subnet address
   values. Or it may be helpful to spoof the ECS address value to a nearby
   subnet if an ECS-enabled nameserver has incorrect geolocation data for
   the real subnet value.
   
   This commit does not include the re-generated flex/bison output files
   due to the changes to the .lex/.y files. Those changes should be added
   as a followup if this patch is merged.

   

   edmonds committed Oct 28, 2024
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