---

CODEX_Quorum Namespace Reference

This namespace holds the class definitions for the CODEX Quorum package. More...

Compounds
class	AsynchronousRemoteServer
	This is an asynchronous implementation of the synchronous base class. More...
class	ByzantineQuorumSystem
	ByzantineQuorumSystem is an abstract base class derived from QuorumSystem. More...
class	ConcreteResponseTracker
	ConcreteResponseTracker is a templated class that correlates responses with requests. More...
class	EchoServer
	Sample server that echoes messages to the terminal and back to the sender. More...
class	LocalServer
	Encapsulation of a local service. More...
class	LoopbackSocket
	This class implements a loopback socket. More...
class	LoopbackSocketBuilder
	This class implements a SocketBuilder for LoopbackSockets. More...
struct	memless
	memless is a memcmp-based sorting function for STL sorting algorithms. More...
class	Message
	Message is a simple data buffer that can grow arbitrarily. More...
class	MessageDispatcher
	Virtual base class for handling new requests. More...
class	QSERemoteServer
	Base class for exceptions relating to RemoteServers. More...
class	QSERemoteServerGethostbynameFailed
	Exception thrown when gethostbyname(3) fails. More...
class	QSESBQSReturnsBad
	Exception thrown when a vector of RemoteServerReturns is too small. More...
class	QSESocketBase
	Base class for exceptions relating to SocketBase and its inheritors. More...
class	QSESocketBaseAcceptFailed
	Exception thrown for failure accepting a connection. More...
class	QSESocketBaseBadSocket
	Exception thrown for failure during construction of SocketBase. More...
class	QSESocketBaseCannotBind
	Exception thrown for failure to bind a socket. More...
class	QSESocketBaseCannotConnect
	Exception thrown for failure to connect to a remote server. More...
class	QSESocketBaseListenFailed
	Exception thrown for failure listening on a socket. More...
class	QSESocketBaseMessageTooLong
	Exception thrown for a message that's too large (greater than 4GB). More...
class	QSESocketBaseMessageTooShort
	Exception thrown for a message that's too short. More...
class	QSESocketBaseReadFailed
	Exception thrown for failure reading from a socket. More...
class	QSESocketBaseSocketClosed
	Exception thrown for an attempt to access a closed socket. More...
class	QSESocketBaseWriteFailed
	Exception thrown for failure writing to a socket. More...
class	QSExceptionBase
	Base class for all exceptions thrown by classes in the Quorum package. More...
class	QuorumDispatcher
	Virtual base class for handling responses from a quorum. More...
class	QuorumSystem
	QuorumSystem is an abstract base class designed to present the basic interface for all quorum systems. More...
class	RemoteServer
	This holds the information necessary in order to contact a server. More...
class	RemoteServerReturn
	Return values from server communications. More...
class	ResponseCallback
	Abstract functional class to process incoming responses. More...
class	ResponseInfo
	This class holds response-tracking information for a single request. More...
class	ResponseTracker
	ResponseTracker is an abstract helper class that provides a mechanism for matching a response to the original request. More...
class	SimpleStaticByzantineQuorumSystem
	Smallest possible T-fault-tolerant StaticByzantineQuorumSystem. More...
class	SocketBase
	This class handles basic socket operations. More...
class	SocketBuilder
	Functional base class for constructing SocketBase objects based on predefined arguments. More...
class	StaticByzantineQuorumSystem
	A compile-time configured Byzantine quorum system. More...
Typedefs
typedef Message	Response
	Convenient typedef to distinguish responses from requests.
typedef vector< Message >	MessageVector
	Convenient typedef.
typedef vector< RemoteServerReturn >	ReturnVector
	Convenient typedef.

---

Detailed Description

This namespace holds the class definitions for the CODEX Quorum package.

This package provides C++ classes to implement a quorum system. The focus is on dissemination Byzantine quorum systems, but the code is designed around a more general structure. Architectures supported include a static quorum configuration supporting arbitrary fault-tolerance at compile time, configurations fixed at run-time, and dynamic configurations where the number of servers and faults may change during the lifetime of program invocation. Classes to manage communications are also included.

The classes forming the bases of their respective hierarchies are:

• CODEX_Quorum::QuorumSystem for arbitrary quorum systems
• CODEX_Quorum::RemoteServer for servers comprising a quorum system (viewed from a client)
• CODEX_Quorum::LocalServer for services provided by a host (viewed from providing server)
• CODEX_Quorum::SocketBase for communications

See also:

Dahlia Malkhi and Michael Reiter. Byzantine Quorum Systems. Distributed Computing, 11(4):203--213, 1998.

This package is part of the Cornell Online Data EXchange (CODEX) project. The primary goal of CODEX is to provide a secure distributed service for disseminating symmetric keys using cryptography-based access control. A secondary goal is the creation of a flexible toolkit for designing other systems implementing fault tolerance and strong security guarantees.

Author:

Michael Marsh, Cornell University

Date:

Last modified

Date:

2004/05/19 15:56:55

Date:

Created July 23, 2002

---