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feat: support allocating public IPv6 addresses from a provider (#2162)

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* feat: support allocating public IPv6 addresses from a provider

Add a provider/leaser architecture for public IPv6 address allocation
between nodes in the same network:

- A node with `--ipv6-public-addr-provider` advertises a delegable
  public IPv6 prefix (auto-detected from kernel routes or manually
  configured via `--ipv6-public-addr-prefix`).
- Other nodes with `--ipv6-public-addr-auto` request a /128 lease from
  the selected provider via a new RPC service (PublicIpv6AddrRpc).
- Leases have a 30s TTL, renewed every 10s by the client routine.
- The provider allocates addresses deterministically from its prefix
  using instance-UUID-based hashing to prefer stable assignments.
- Routes to peer leases are installed on the TUN device, and each
  client's own /128 is assigned as its IPv6 address.

Also includes netlink IPv6 route table inspection, integration tests,
and event-driven route/address reconciliation.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
KKRainbow
2026-04-26 21:37:34 +08:00
committed by GitHub
parent b20075e3dc
commit 8f862997eb
30 changed files with 3973 additions and 69 deletions
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easytier/locales/app.yml
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@@ -39,6 +39,15 @@ core_clap:
ipv6:
en: "ipv6 address of this vpn node, can be used together with ipv4 for dual-stack operation"
zh-CN: "此VPN节点的IPv6地址，可与IPv4一起使用以进行双栈操作"
ipv6_public_addr_provider:
en: "share this node's public IPv6 subnet with other peers so they can obtain public IPv6 addresses (Linux only)"
zh-CN: "将此节点的公网 IPv6 子网共享给其他节点，使它们也能获得公网 IPv6 地址（仅 Linux 支持）"
ipv6_public_addr_auto:
en: "auto-obtain a public IPv6 address from a peer that shares its IPv6 subnet"
zh-CN: "自动从共享了 IPv6 子网的对等节点获取一个公网 IPv6 地址"
ipv6_public_addr_prefix:
en: "manually specify the public IPv6 subnet to share, instead of auto-detecting from system routes"
zh-CN: "手动指定要共享的公网 IPv6 子网，不自动从系统路由检测"
dhcp:
en: "automatically determine and set IP address by Easytier, and the IP address starts from 10.0.0.1 by default. Warning, if there is an IP conflict in the network when using DHCP, the IP will be automatically changed."
zh-CN: "由Easytier自动确定并设置IP地址，默认从10.0.0.1开始。警告：在使用DHCP时，如果网络中出现IP冲突，IP将自动更改。"