Commits on Sep 24, 2024

1. INKVConnInternal::do_io_*: handle null buffer …

   It's common for users of VC's to cancel io via a 0 byte, nullptr read or
   write on the VC. INKVConnInternal::do_io_read and
   INKVConnInternal::do_io_write were not prepared to handle such
   cancellations. This updates them to handle this gracefully rather than
   crashing on a nullptr dereference. This change is was found to be needed
   for the multiplexer plugin for handling HttpTunnel aborts.
   
   For reference, see, for example, UnixNetVConnection::do_io_read which
   handles a nullptr MIOBuffer. This basically copies that logic into
   INKVConnInternal so it handles cancellation gracefully.

   

   bneradt committed Sep 24, 2024
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