libbinder: fix trusty cpp fd transport modes

This moves the call to set allowed file descriptor transport modes to a
common method that is invoked on both cpp and rust construction of
RpcServerTrusty objects.

Test: atest -c frameworks/native/libs/binder/tests/
Bug: 393346719
Change-Id: I0ec04676ff36879ce2b40f5070214b1cbe21f2b0

2 files changed, 9 insertions, 9 deletions

diff --git a/libs/binder/trusty/include/binder/RpcServerTrusty.h b/libs/binder/trusty/include/binder/RpcServerTrusty.h
index 127676bf9a..1ac00ca13f 100644
--- a/libs/binder/trusty/include/binder/RpcServerTrusty.h
+++ b/libs/binder/trusty/include/binder/RpcServerTrusty.h
@@ -97,6 +97,15 @@ private:
         // By default we use the latest stable version.
         LOG_ALWAYS_FATAL_IF(!rpcServer->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION));
 
+        // The default behavior in trusty is to allow handles to be passed with tipc IPC.
+        // We add mode NONE so that servers do not reject connections from clients who do
+        // not change their default transport mode.
+        static const std::vector<RpcSession::FileDescriptorTransportMode>
+                TRUSTY_SERVER_SUPPORTED_FD_MODES = {RpcSession::FileDescriptorTransportMode::TRUSTY,
+                                                    RpcSession::FileDescriptorTransportMode::NONE};
+
+        rpcServer->setSupportedFileDescriptorTransportModes(TRUSTY_SERVER_SUPPORTED_FD_MODES);
+
         return rpcServer;
     }
 
diff --git a/libs/binder/trusty/rust/binder_rpc_server_bindgen/cpp/ARpcServerTrusty.cpp b/libs/binder/trusty/rust/binder_rpc_server_bindgen/cpp/ARpcServerTrusty.cpp
index 12e347e4f3..451383a90a 100644
--- a/libs/binder/trusty/rust/binder_rpc_server_bindgen/cpp/ARpcServerTrusty.cpp
+++ b/libs/binder/trusty/rust/binder_rpc_server_bindgen/cpp/ARpcServerTrusty.cpp
@@ -27,13 +27,6 @@ using android::RpcTransportCtxFactoryTipcTrusty;
 using android::sp;
 using android::wp;
 
-// The default behavior in trusty is to allow handles to be passed with tipc IPC.
-// We add mode NONE so that servers do not reject connections from clients who do
-// not change their default transport mode.
-static const std::vector<RpcSession::FileDescriptorTransportMode> TRUSTY_SERVER_SUPPORTED_FD_MODES =
-        {RpcSession::FileDescriptorTransportMode::TRUSTY,
-         RpcSession::FileDescriptorTransportMode::NONE};
-
 struct ARpcServerTrusty {
     sp<RpcServer> mRpcServer;
 
@@ -60,8 +53,6 @@ ARpcServerTrusty* ARpcServerTrusty_newPerSession(AIBinder* (*cb)(const void*, si
         return nullptr;
     }
 
-    rpcServer->setSupportedFileDescriptorTransportModes(TRUSTY_SERVER_SUPPORTED_FD_MODES);
-
     rpcServer->setPerSessionRootObject(
             [cb, cbArgSp](wp<RpcSession> /*session*/, const void* addrPtr, size_t len) {
                 auto* aib = (*cb)(addrPtr, len, cbArgSp.get());