Description

Adds support for running diffusion on multiple network interfaces at once, rather than at most one IPv4 and one IPv6 address.

• Diffusion.Configuration.dcAddresses :: Either (NonEmpty ntnFd) (NonEmpty ntnAddr) replaces the separate dcIPv4Address/dcIPv6Address fields. A server socket is opened on every configured address (or systemd socket); outbound connections pick a random configured interface matching the peer's address family. The readIPAndPort command-line parser moved from cardano-ping into ouroboros-network so it can be reused for parsing these addresses.

• Simplified Snocket.AddressFamily to a plain AFInet | AFInet6 | AFLocal enum, dropping the TestFamily/TestAddress GADT indexing. ConnectionManager.Arguments's addressType field is removed in favour of Snocket.addrFamily.

  • Why: addrFamily and addressType were two separate, redundant classifications of the same address that could silently disagree — addrFamily reflects an address's real family, while addressType was supplied independently (and in test code, often hardcoded to a constant). That divergence is exactly the kind of bug this closes off; a single source of truth removes the failure class outright.

• Simulation.Network.Snocket is now monomorphic over a concrete NetworkAddress type (ported from the diffusion testnet), simplifying the simulated-network test code.

  • Why: the previous TestAddress addr + GlobalAddressScheme addr typeclass indirection gave each test module its own ad-hoc family classification
    (e.g. even/odd on an Int) unrelated to the address's real shape. A concrete type with genuine EphIPv4Addr/EphIPv6Addr/IPAddr/LocalAddr constructors lets tests exercise real, distinguishable address-family behaviour — which is what multiple-interface support actually needs to be tested against.

• Updates framework-sim-tests to generate consistent AFInet/AFInet6 multi-node scripts, now that addrFamily reflects real address families instead of a constant.

Breaking changes

• Diffusion.Configuration: dcIPv4Address/dcIPv6Address → dcAddresses.
• ConnectionManager.Arguments: ipv4Address/ipv6Address are now [peerAddr] lists; addressType removed (use Snocket.addrFamily).
• Snocket.AddressFamily is no longer indexed by address type; TestAddress removed.

Checklist

Quality

• Commit sequence makes sense and have useful messages, see ref.
• New tests are added and existing tests are updated.
• Self-reviewed the PR.

Maintenance

• Linked an issue or added the PR to the current sprint of ouroboros-network project.
• Added labels.
• Updated changelog files.
• The documentation has been properly updated, see ref.