require methods to request AuxRequest capability at startup

Allowing a method to request work from other methods is a powerful
capability which could be misused or exploited, so to slightly limited
the surface let method opt-in into this capability on startup.

1 files changed, 6 insertions, 2 deletions

diff --git a/apt-pkg/acquire.h b/apt-pkg/acquire.h
index e58aeef65..1cf4da5bf 100644
--- a/apt-pkg/acquire.h
+++ b/apt-pkg/acquire.h
@@ -636,9 +636,10 @@ class pkgAcquire::UriIterator
 /** \brief Information about the properties of a single acquire method.	{{{*/
 struct pkgAcquire::MethodConfig
 {
+   class Private;
    /** \brief dpointer placeholder (for later in case we need it) */
-   void * const d;
-   
+   Private *const d;
+
    /** \brief The next link on the acquire method list.
     *
     *  \todo Why not an STL container?
@@ -688,6 +689,9 @@ struct pkgAcquire::MethodConfig
     */
    MethodConfig();
 
+   APT_HIDDEN bool GetAuxRequests() const;
+   APT_HIDDEN void SetAuxRequests(bool const value);
+
    virtual ~MethodConfig();
 };
 									/*}}}*/