M1 probe: GoOnline passes, gate is downstream (token/status)

Add a read-only detour on anadius's GoOnline handler (anadius64.dll+0x2BB90).
Result: the game calls GoOnline during the "connecting" attempt and anadius
returns success, yet no Blaze connection follows. The gate is therefore
downstream of GoOnline -- the auth-token (GetAuthCode) and/or the "online
established" status callback. Recorded in connection-gate-findings.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/connection-gate-findings.md

@@ -119,7 +119,26 @@ only — no EA source.
 - `TODO/CONFIRM` the exact abort point (no-token vs state-says-offline vs both) —
   needs Ghidra-level control-flow tracing.
 
-### Recommendation
-Load `FIFA23.exe` into **Ghidra** to (a) name the connection-state getter
-precisely and (b) confirm the gate mechanism, then return to `protossl-scan` +
-the hook to map those addresses onto the live process and install the M2 hook.
+### Dynamic probe result (read-only) — `GoOnline` is NOT the gate
+A read-only detour on anadius's `GoOnline` handler (`anadius64.dll+0x2BB90`)
+shows the game **does** call `GoOnline` during the "connecting" attempt (incl.
+on the Ultimate Team click) and anadius returns success — **yet no Blaze
+connection follows** (still zero external `CONNECT`/DNS).
+
+Therefore the gate is **downstream of `GoOnline`**: the game decides to go
+online and the request is accepted, then it aborts at the **auth-token step
+(`GetAuthCode`) and/or while waiting for the "online established" status
+callback** (`ONLINE_STATUS_EVENT`), and times out into offline.
+
+This sharpens the two-gate picture: `GoOnline` passes; the real blocker is the
+**token / online-status step**. `TODO/CONFIRM` which (token-missing vs
+status-never-fires) — via a `GetAuthCode` probe and/or Ghidra.
+
+### Recommendation / next
+Name the downstream gate. Two complementary routes:
+- **Dynamic:** probe anadius's `GetAuthCode` handler (does it return a token or
+  fail?) — distinguishes token-gate from status-callback.
+- **Static (Ghidra):** xref the `GoOnline` / `GetAuthCode` / `ONLINE_STATUS_EVENT`
+  strings in `FIFA23.exe` to find the FUT online-flow code that issues `GoOnline`
+  then waits for the token/status, and decompile it. FIFA isn't ASLR'd, so Ghidra
+  addresses (image base `0x140000000`) map 1:1 to our recorded offsets.

openfut-hook/src/lib.rs

@@ -191,15 +191,31 @@ unsafe extern "system" fn init_thread(_: *mut c_void) -> u32 {
     hook_winsock_data();
     hook_connect();
 
-    // Then the plaintext-capture detour on _ProtoSSLSendPacket.
+    // Then the plaintext-capture detour on _ProtoSSLSendPacket, plus the
+    // read-only anadius GoOnline probe (M1). Retry until both are installed.
+    let mut send_done = false;
+    let mut anadius_done = false;
     for _ in 0..60 {
-        if let Some(addr) = find_send_packet() {
-            install_hook(addr);
+        if !send_done {
+            if let Some(addr) = find_send_packet() {
+                install_hook(addr);
+                send_done = true;
+            }
+        }
+        if !anadius_done && hook_anadius_probes() {
+            anadius_done = true;
+        }
+        if send_done && anadius_done {
             return 0;
         }
         Sleep(1000);
     }
-    log("ERROR: _ProtoSSLSendPacket pattern not found after 60s");
+    if !send_done {
+        log("ERROR: _ProtoSSLSendPacket pattern not found after 60s");
+    }
+    if !anadius_done {
+        log("ERROR: anadius64.dll not loaded after 60s; GoOnline probe not installed");
+    }
     0
 }
 
@@ -377,6 +393,12 @@ unsafe fn install_detour(
             return;
         }
     };
+    install_detour_at(addr, detour, slot, label);
+}
+
+/// Install an inline detour at a raw address (for non-exported targets such as
+/// internal anadius handlers located by module+offset).
+unsafe fn install_detour_at(addr: usize, detour: *const (), slot: &AtomicUsize, label: &str) {
     let d = match RawDetour::new(addr as *const (), detour) {
         Ok(d) => d,
         Err(e) => {
@@ -393,6 +415,43 @@ unsafe fn install_detour(
     log(&format!("{label} hook installed"));
 }
 
+// --- M1 read-only probe: anadius GoOnline handler -------------------------
+
+static ORIG_GOONLINE: AtomicUsize = AtomicUsize::new(0);
+
+/// Read-only detour on anadius's GoOnline handler (anadius64.dll+0x2BB90): log
+/// that it was reached, then call the original unchanged. Tells us whether the
+/// game even asks to go online during the "connecting" attempt.
+unsafe extern "system" fn hooked_goonline(a: usize, b: usize, c: usize, d: usize) -> usize {
+    log(&format!("PROBE anadius GoOnline CALLED (rcx=0x{a:X} rdx=0x{b:X})"));
+    let orig = ORIG_GOONLINE.load(Ordering::SeqCst);
+    if orig != 0 {
+        let f: unsafe extern "system" fn(usize, usize, usize, usize) -> usize =
+            core::mem::transmute(orig);
+        f(a, b, c, d)
+    } else {
+        0
+    }
+}
+
+/// Resolve anadius64.dll's runtime base and detour the GoOnline handler.
+/// Returns true once installed (or if anadius isn't present and we should stop
+/// retrying is decided by the caller). Returns false if anadius isn't loaded yet.
+unsafe fn hook_anadius_probes() -> bool {
+    let base = match GetModuleHandleW(PCWSTR(wide("anadius64.dll").as_ptr())) {
+        Ok(m) => m.0 as usize,
+        Err(_) => return false, // not loaded yet
+    };
+    log(&format!("anadius64.dll base = 0x{base:X}"));
+    install_detour_at(
+        base + 0x2BB90,
+        hooked_goonline as *const (),
+        &ORIG_GOONLINE,
+        "PROBE anadius GoOnline @ +0x2BB90",
+    );
+    true
+}
+
 /// Detour the DNS resolvers so we see every hostname lookup.
 unsafe fn hook_dns() {
     let ws2 = match LoadLibraryW(PCWSTR(wide("ws2_32.dll").as_ptr())) {