with reference to the post http://community.qnx.com/sf/discussion/do/listPosts/projects.networking/discussion.technology.topc6252 We are considering modifying ip_input.c on our own as a temporary fix to handle the router alert option. Since nothing is passed back from ip_dooptions, we set a global variable inside it if router alert option is spotted. In ip_input(), we use the global variable to decide whether to treat the packet as one directed to us. This seems to be working, but we are not sure whether it is safe to use a global variable. So we would like to know whether ip_input() is a re-entrant ?
On Tue, Mar 03, 2009 at 02:48:34AM -0500, Rosen Rosen wrote: > with reference to the post > > http://community.qnx.com/sf/discussion/do/listPosts/projects.networking/discussion.technology.topc6252 > > We are considering modifying ip_input.c on our own as a temporary fix to handle the router alert option. Since nothing is passed back from ip_dooptions, we set a global variable inside it if router alert option is spotted. In ip_input(), we use the global variable to decide whether to treat the packet as one directed to us. > > This seems to be working, but we are not sure whether it is safe to use a global variable. So we would like to know whether ip_input() is a re-entrant ? A global is OK currently. ip_input is not currently re-entrant. -seanb
Thanks for the quick response.
