41b5af9b16
## Issue Addressed #3103 ## Proposed Changes Parse `http-address` and `metrics-address` as `IpAddr` for both the beacon node and validator client to support IPv6 addresses. Also adjusts parsing of CORS origins to allow for IPv6 addresses. ## Usage You can now set `http-address` and/or `metrics-address` flags to IPv6 addresses. For example, the following: `lighthouse bn --http --http-address :: --metrics --metrics-address ::1` will expose the beacon node HTTP server on `[::]` (equivalent of `0.0.0.0` in IPv4) and the metrics HTTP server on `localhost` (the equivalent of `127.0.0.1` in IPv4) The beacon node API can then be accessed by: `curl "http://[server-ipv6-address]:5052/eth/v1/some_endpoint"` And the metrics server api can be accessed by: `curl "http://localhost:5054/metrics"` or by `curl "http://[::1]:5054/metrics"` ## Additional Info On most Linux distributions the `v6only` flag is set to `false` by default (see the section for the `IPV6_V6ONLY` flag in https://www.man7.org/linux/man-pages/man7/ipv6.7.html) which means IPv4 connections will continue to function on a IPv6 address (providing it is appropriately mapped). This means that even if the Lighthouse API is running on `::` it is also possible to accept IPv4 connections. However on Windows, this is not the case. The `v6only` flag is set to `true` so binding to `::` will only allow IPv6 connections. |
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