From 81bc43aa96f0059cecb28d1bd88338b7d84667f9 Mon Sep 17 00:00:00 2001 From: Stefan Boberg Date: Thu, 12 Mar 2026 15:03:03 +0100 Subject: Transparent proxy mode (#823) Adds a **transparent TCP proxy mode** to zenserver (activated via `zenserver proxy`), allowing it to sit between clients and upstream Zen servers to inspect and monitor HTTP/1.x traffic in real time. Primarily useful during development, to be able to observe multi-server/client interactions in one place. - **Dedicated proxy port** -- Proxy mode defaults to port 8118 with its own data directory to avoid collisions with a normal zenserver instance. - **TCP proxy core** (`src/zenserver/proxy/`) -- A new transparent TCP proxy that forwards connections to upstream targets, with support for both TCP/IP and Unix socket listeners. Multi-threaded I/O for connection handling. Supports Unix domain sockets for both upstream/downstream. - **HTTP traffic inspection** -- Parses HTTP/1.x request/response streams inline to extract method, path, status, content length, and WebSocket upgrades without breaking the proxied data. - **Proxy dashboard** -- A web UI showing live connection stats, per-target request counts, active connections, bytes transferred, and client IP/session ID rollups. - **Server mode display** -- Dashboard banner now shows the running server mode (Zen Proxy, Zen Compute, etc.). Supporting changes included in this branch: - **Wildcard log level matching** -- Log levels can now be set per-category using wildcard patterns (e.g. `proxy.*=debug`). - **`zen down --all`** -- New flag to shut down all running zenserver instances; also used by the new `xmake kill` task. - Minor test stability fixes (flaky hash collisions, per-thread RNG seeds). - Support ZEN_MALLOC environment variable for default allocator selection and switch default to rpmalloc - Fixed sentry-native build to allow LTO on Windows --- src/zenserver/main.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'src/zenserver/main.cpp') diff --git a/src/zenserver/main.cpp b/src/zenserver/main.cpp index 09ecc48e5..26ae85ae1 100644 --- a/src/zenserver/main.cpp +++ b/src/zenserver/main.cpp @@ -31,6 +31,8 @@ #include "hub/zenhubserver.h" +#include "proxy/zenproxyserver.h" + #if ZEN_PLATFORM_WINDOWS # include # include @@ -291,6 +293,7 @@ main(int argc, char* argv[]) kHub, kStore, kCompute, + kProxy, kTest } ServerMode = kStore; @@ -308,6 +311,10 @@ main(int argc, char* argv[]) { ServerMode = kCompute; } + else if (argv[1] == "proxy"sv) + { + ServerMode = kProxy; + } else if (argv[1] == "test"sv) { ServerMode = kTest; @@ -333,6 +340,8 @@ main(int argc, char* argv[]) fprintf(stderr, "compute services are not compiled in!\n"); exit(5); #endif + case kProxy: + return AppMain(argc, argv); default: case kStore: return AppMain(argc, argv); -- cgit v1.2.3