Convert a sing-box outbound dict to Clash proxy dict.

Extract proxy links from arbitrary text (HTML, Markdown, etc.)

Convert a list of sing-box nodes to Clash proxies with unique names.

Parse content that might be base64 encoded or plain text list

构造 DNS A 记录查询包

Perform the actual geo lookup (no caching).

获取当前机器的真实IP（不经过代理）

让 OS 分配一个空闲端口，避免与 ephemeral 端口范围冲突

解析 DNS 响应获取第一个 A 记录 IP

Poll until sing-box SOCKS5 port accepts connections (replaces sleep).

Calculates a hash for the node based on AutoMergePublicNodes logic. Uses SHA256 for stability across runs.

通过 SOCKS5 代理的 TCP DNS 检查域名解析

通过 SOCKS5 UDP ASSOCIATE 测试 UDP 转发 构造 DNS 查询包测试 8.8.8.8:53

Get geo information for a host, with in-memory caching. Thread-safe: safe to call from multiple threads simultaneously. Retur

Checks if the node is a duplicate based on a complex hash (type, server, port, path/uuid). Returns True if duplicate, False otherwise

Checks if the server:port has already been seen. Returns True if redundant, False otherwise.

P1: 快速 TCP 连通性预筛选（仅对 TCP 协议节点） 在 sing-box 验证前快速排除不通的节点，大幅缩短总验证时间 注意：UDP 协议节点（hysteria2/tuic）跳过 TCP 预筛选，直接进入完整验证

Extract HTTP/HTTPS links that might be subscription sources

Ensure 'hy2' type alias maps to hysteria2 converter.