build

default.nix

@@ -0,0 +1,10 @@
+{ pkgs ? import <nixpkgs> { }, ... }: pkgs.rustPlatform.buildRustPackage {
+  src = pkgs.lib.cleanSource ./.;
+  pname = "fakessh";
+  version = "0.1.0";
+  cargoLock.lockFile = ./Cargo.lock;
+
+  meta = {
+    mainProgram = "fakessh";
+  };
+}

src/main.rs

@@ -22,7 +22,11 @@ async fn main() -> eyre::Result<()> {
         )
         .init();
 
-    let addr = "0.0.0.0:2222".parse::<SocketAddr>().unwrap();
+    let addr = std::env::var("FAKESSH_LISTEN_ADDR").unwrap_or_else(|_| "0.0.0.0:2222".to_owned());
+
+    let addr = addr
+        .parse::<SocketAddr>()
+        .wrap_err_with(|| format!("failed to parse listen addr '{addr}'"))?;
 
     info!(?addr, "Starting server");
 

test-openssh/default.nix

@@ -1,19 +0,0 @@
-{ pkgs ? import <nixpkgs> { }, ... }:
-let
-  optimizeWithFlags = pkg: flags:
-    pkgs.lib.overrideDerivation pkg (old:
-      let
-        newflags = pkgs.lib.foldl' (acc: x: "${acc} ${x}") "" flags;
-        oldflags =
-          if (pkgs.lib.hasAttr "NIX_CFLAGS_COMPILE" old)
-          then "${old.NIX_CFLAGS_COMPILE}"
-          else "";
-      in
-      {
-        CFLAGS = "-DDEBUG_KEXDH -DDEBUG_KEX -DDEBUG_KEXECDH";
-        NIX_CFLAGS_COMPILE = "${oldflags} ${newflags}";
-        checkPhase = "";
-        doCheck = false;
-      });
-in
-optimizeWithFlags pkgs.openssh [ "-DDEBUG_KEXDH" ]