Abstract: A socket service may be used to link a peer socket to another peer socket. The peer socket is for communicating data to and from a client device and the other peer socket is for communicating data to and from another client device. If a socket opens and the corresponding peer socket is not yet open then the socket waits for the corresponding peer socket to open. When a client device requests a socket to be opened, the client device requests a particular client-defined function mapping to be associated with the socket. When the socket is opened, the endpoint specified in the client-defined function mapping is invoked. An identifier associated with the client device is sent to the endpoint. If the endpoint returns a socket identifier for another socket, then the socket service links the peer socket to the other peer socket, linking the client device to another client device.

Abstract: A socket service may be used to implement client-defined function mappings (e.g., custom protocols) for sockets hosted by the socket service so that when a particular socket is opened for a particular client device, the socket operates according to a particular client-defined function mapping requested by the particular client device. To establish a particular client-defined function mapping, a socket manager may receive request from a user that specifies a particular endpoint (e.g., a client-registered function). When a client device requests a socket to be opened, the client device requests the particular client-defined function mapping to be associated with the socket. When the socket is opened, the endpoint is invoked. The particular client-defined function mapping may also specify one or more receive criteria for data received at the socket. If the one or more receive criteria is met, the endpoint is invoked by sending the data to the endpoint.

Abstract: A bougie having the dimensions of a standard bougie used widely by first responders is further configured to emit tight with an intensity that transilmminates a patient's neck; thus the position of the bougie is visible to the first responder when placed in the patient's airway. The bougie includes a light source, which may be a luminescent chemical combination contained in a chamber of the bougie. The luminescent chemical may have a high intensity and a short duration. The light source may be a light-emitting diode powered by an onboard battery and emitting light into a fiber-optic cable that emits light from the distal end and/or from interruptions in a reflecting coating that allows transverse exit of some of the light. The light source may be a chemilmninescent material or compound. All components of the bougie are sized to pass through an endotracheal tube without removing any of the components.