Make REQUEST_AGPL messages configurable and add handler by default

This makes two changes:

* Add a field to `struct GNUNET_OS_ProjectData' containing a URL (as a string)
pointing to the source code of the application.

* If the field is not NULL, add a handler for the REQUEST_AGPL messages
sending the specified URL to the client.

The handler is added both in client-service communications (i.e. local
services that don't make requests to other peers in the network) and in
peer-peer communications (CADET.)  This way, any client (local or remote with
CADET) can request the source code location using a standardized mechanism
instead of writing ad-hoc solutions (unless the service/peer explicitly
specifies a NULL pointer.)

Signed-off-by: Christian Grothoff <christian@grothoff.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/include/gnunet_os_lib.h b/src/include/gnunet_os_lib.h
index a6188c1ca..b583cc493 100644
--- a/src/include/gnunet_os_lib.h
+++ b/src/include/gnunet_os_lib.h
@@ -287,6 +287,14 @@ struct GNUNET_OS_ProjectData
    * If this field is NULL, the path is automatically inferred.
    */
   char *gettext_path;
+
+  /**
+   * URL pointing to the source code of the application.  Required for AGPL.
+   * Setting this to NULL disables the built-in mechanism, but you must
+   * provide it in some other way.  If non-NULL, message type 1 and 2 are
+   * reserved.
+   */
+  char *agpl_url;
 };