infra: Add RCP proxy binary and client library #449
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Pull request overview
This PR adds infrastructure for a reverse-connect proxy (RCP) system that enables secure communication between a proxy and client over TLS. The proxy component connects to a client listener, then forwards traffic between the client and a Unix socket server.
Key changes:
- Implements TLS certificate generation and embedding for mutual TLS authentication
- Adds
rcp-proxybinary that connects to an RCP client and forwards traffic to a Unix socket - Provides a client library for accepting reverse connections from the proxy
Reviewed changes
Copilot reviewed 10 out of 10 changed files in this pull request and generated 10 comments.
Show a summary per file
| File | Description |
|---|---|
tools/pkg/rcp/tlscerts/generate.go |
Standalone tool to generate self-signed TLS certificates for testing |
tools/pkg/rcp/tlscerts/certs.go |
Common functions to access embedded certificate data |
tools/pkg/rcp/tlscerts/keyserver.go |
Server-side certificate loading (build tag: tls_server) |
tools/pkg/rcp/tlscerts/keyclient.go |
Client-side certificate loading (build tag: tls_client) |
tools/pkg/rcp/tlscerts/.gitignore |
Excludes generated certificate files from git |
tools/pkg/rcp/proxy/proxy.go |
Implements reverse-connect proxy logic with TLS and bidirectional traffic forwarding |
tools/pkg/rcp/client/listen.go |
Client library for accepting TLS connections from the proxy |
tools/pkg/rcp/harpoon.go |
Defines default Unix socket path constant |
tools/cmd/rcp-proxy/main.go |
CLI entry point for the rcp-proxy binary |
.vscode/settings.json |
Adds build tags for Go tooling support |
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
…to user/frhuelsz/grpc/rcp-proxy
bfjelds
reviewed
Jan 12, 2026
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
bfjelds
approved these changes
Jan 21, 2026
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🔍 Description
Closes #403
bin/rcp-proxy, the proxy component of a reverse-connect proxy setup.