OpenVPN client with an authenticated SOCKS5 front door

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A userspace VPN gateway: builds an OpenVPN tunnel to a VPNGate node with
the OpenVPN 3 core, terminates it in-process with lwIP, and serves SOCKS5
(RFC 1928/1929, CONNECT and UDP ASSOCIATE) over it. No root, no tun
device, no routing table changes.

Layout follows the module boundaries in docs/ARCHITECTURE.md:

  vpngate/   directory fetch + CSV parse (lines run to ~13.5 KB, so the
             parser streams rather than splitting on newlines)
  selector/  two-phase pick: cheap prior over the whole list, then real
             TCP handshake timing of the top K
  ovpn/      openvpn3 driven through TunBuilder, packets over a socketpair
  netstack/  lwIP: the TCP/IP stack that makes "no root" possible
  egress/    the swappable way out, and make-before-break switching
  socks5/    the front door
  health/    per-window scoring, and the decision to move
  app/       wiring, admin HTTP, signals

docs/FEASIBILITY.md is the analysis this was built from, including the
one requirement that is not physically possible -- carrying established
TCP connections across a node switch -- and what is done instead
(zero-progress redial, UDP re-homing, grace-period drain).

Tests: 155 without the tunnel egress, 172 with it. The seam is the egress
factory; selection, scoring, history and probing all run for real.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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iceBear67

2026-07-28 04:38:39 +00:00

co-authored by Claude Opus 5

commit b2ba45c9f8

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