sagar/softether-go
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12 commits

Author SHA1 Message Date
Git Sagar
47e06b525c tunnel: replace write mutex with channel-based single writer 
All writes (frames, keepalive, DHCP renewal) are queued to a buffered
channel and drained by a single writer goroutine. Eliminates mutex
contention on the data path entirely.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 23:16:27 +05:30
Git Sagar
14ec4a02dd tunnel: buffer WriteFrames into single TLS write 
Assemble numBlocks + frame sizes + frame data into one buffer before
writing. Reduces TLS records and syscalls from 3 per frame to 1.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 23:07:55 +05:30
Git Sagar
fc07ac507d dhcp: generate fresh xid per exchange 
New random transaction ID for each DHCP exchange (initial and renewal)
to avoid matching stale responses from previous transactions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 22:58:00 +05:30
Git Sagar
b3f4c5f42b tunnel: add write mutex for concurrent safety 
WriteFrames and keepalive both write multi-part messages to the TLS
connection. Without synchronization, their writes could interleave
and corrupt the framing. Add writeMu to serialize all tunnel writes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 22:53:06 +05:30
Git Sagar
6416159164 add DHCP lease renewal at T/2 
- Add Renew() to dhcp.Client: sends REQUEST with ciaddr (RENEWING state)
- Start renewal goroutine in session at lease_time/2
- On IP change: flush TAP, reconfigure address/routes/DNS/policy routes
- On renewal failure: retry at T/4 (min 60s)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 22:05:34 +05:30
Git Sagar
bbeeb8c41b tunnel: document TAP goroutine lifecycle on disconnect 
The TAP→Server goroutine can't be interrupted (TAP fd doesn't support
deadlines). It exits on next TAP frame when WriteFrames fails on the
closed connection. Document this rather than add complexity.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 17:29:47 +05:30
Git Sagar
b2ef8bc1bf tunnel: reduce per-frame allocations in hot path 
- TAP→server: write buf[:n] directly instead of copy to new slice
- Keepalive: reuse fixed buffer instead of allocating every 3s

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 17:20:24 +05:30
Git Sagar
3feb93e679 client: fix version display and rename client string 
- Rename client to "Softether Go Client"
- Fix node info int fields to use LittleEndian32 encoding matching
  the C client's OutRpcNodeInfo (Admin.c:14693)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 17:15:35 +05:30
Git Sagar
ed672e7311 client: rename client string to Softether Go Client 
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 17:11:32 +05:30
Git Sagar
995504d761 netcfg: add verbose logging for TAP configuration 
Log each step: address assignment, static routes, default route,
DNS changes, and cleanup flush.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 17:08:28 +05:30
Git Sagar
17c1063e1f refactor: extract session/netcfg/tunnel, add mac/dhcp/policy-route flags 
- Split cmd/softether-go into main.go (flags, reconnect loop) and
  session.go (session lifecycle, DHCP orchestration)
- Extract network config to pkg/netcfg (TAP config, routing, DNS, policy routes)
- Move frame bridging to pkg/client/tunnel.go as Bridge() method
- Add -mac, -dhcp, -policy-route-table CLI flags
- Add SetMAC() to pkg/tap for deterministic DHCP assignments
- Update all docs to reflect new structure and flags

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-06-06 16:43:12 +05:30
Git Sagar
829ca73b1b initial commit: standalone SoftEther VPN client in Go 
Built-in DHCP (raw Ethernet frames through tunnel), automatic reconnection,
host route management, classless static routes (option 121/249), DNS config.
Single static binary, Linux only.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-06-06 16:13:51 +05:30