• David Howells's avatar
    rxrpc: Permit multiple service binding · 28036f44
    David Howells authored
    Permit bind() to be called on an AF_RXRPC socket more than once (currently
    maximum twice) to bind multiple listening services to it.  There are some
    restrictions:
    
     (1) All bind() calls involved must have a non-zero service ID.
    
     (2) The service IDs must all be different.
    
     (3) The rest of the address (notably the transport part) must be the same
         in all (a single UDP socket is shared).
    
     (4) This must be done before listen() or sendmsg() is called.
    
    This allows someone to connect to the service socket with different service
    IDs and lays the foundation for service upgrading.
    
    The service ID used by an incoming call can be extracted from the msg_name
    returned by recvmsg().
    Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
    28036f44
ar-internal.h 37.8 KB