A Connection represents the c= field associated with a SessionDescription or with an individual
MediaDescription and is used to identify a network address on which media can be received.
Constructs a new SdpException when the Codelet needs to throw an
exception and include a message about another exception that interfered
with its normal operation.
A SessionDescription represents the data defined by the Session Description
Protocol (see
IETF RFC 2327) and holds information about the originitor of a session,
the media types that a
client can support and the host and port on which the client will listen
for that media.