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Transcript of BEEP (en)
A TCP/IP protocol construction kit
OSI 1-2 Hardware Interface
OSI 3 IP
OSI 4 TCP/UDP
OSI 5-7 Application
Fast, secure, simple and everywhere available.
Telefon: +49 (0) 431/38 21 65 00
No matching protocol found ? What now ?
Use an existing protocol even if it does not match the requirements completly.
Peer to Peer z.B. via http
one connection per request
many implementations available
not all requirements matched
The socket trap !
Existing protocols are not flexible enough and do not match the requirements.
TCP Sockets are flexible and everywhere (language/platform) available.
The protocol requirements are not completly known.
Develop a new custom protocol "unwittingly".
The protocol will be a vulnerability of the system.
Project periods will be exceeded because of frequent protocol problems.
The protocol will be difficult to maintain for new requirements.
peer to peer
progress and status
calling remote functions
parameter and result
monitor command calls
showing processing status (progress)
equally privileged communication
push data to client applications
Peer to Peer
Client/Server is a subset
BEEP - Blocks Extensible Exchange Protocol
Carl Malamud and Marshall T. Rose
describing BXXP the predecessor of BEEP.
The IETF working group publishes RFC3080/RFC3081 which describes BEEP and BEEP on TCP.
IETF = Internet Engineering Task Force
Protocol construction kit
Forgot something ?
Tells how the beginning and ending of each message is delimited.
Tells how a message is represented.
Tells how errors are described.
Tells how independent exchanges are handled.
Tells how the peers at each end of the connection are identified and verified.
Tells how the exchanges are protected against third-party interception (TLS/SASL).
Robust protocol vs. Quick Hack
Properties of a good protocol.
Sooner or later, someone would have to write something like BEEP/Vortex if you only have TCP
Francis Brosnan Blázquez, ASPL's CTO and Vortex Library's project leader
General requirements for application protocols.
Tells how multiple outstanding requests are handled.
Tells how multiple asynchronous requests are handled.
Standard function of a protocol don't need to be developed.
The development is focused on the real task.
A construction kit for everything ?
allow asychronous message exchange
Not supported ?
connectionless protocols (UDP)
Profiles and Channels
Profile, Profile, Profile ...
More information about BEEP
XML-RPC via Vortex
Channel 0 is reserved for control.
Functions and services of a peer are implemented as profile.
One connection can provide multiple profiles.
A channel is assigned to a particular profile.
preferred diagnostic language
<greeting localize='en-US fr-CA'>
<profile uri='http://iana.org/beep/syslog' />
<profile uri='http://iana.org/beep/TLS' />
Profiles are uniquely identified with URLs.
Profile IDs are NOT internet addresses.
reliable syslog RFC3195
SOAP over BEEP RFC4227
TUNNEL Profile RFC3620
To use BEEP, a profile needs to implemented on top of the BEEP core.
Developing a profile is faster and more reliable than developing a protocol.
Already specified profiles
Official BEEP page
BEEP: The Definitive Guide (Definitive Guides) (Englisch)
1. April 2002 by Marshall T. Rose
Open Source BEEP C implementation.
Free Pascal compponents based on Vortex libraries.
BEEP core Java implementation based on Apache MINA (Multipurpose Infrastructure for Network Applications)
Vortex BEEP core
C API for RPC (Remote Procedure Calls) with Vortex.
Vortex includes an implementation of RFC3529.
Create interfaces with a protocol compiler (IDL, XDL)
The Missing Link
A BEEP profile construction kit
full UTF-8 support
Internet of Things - IOT
Internet Applications RIA
no HOL Blocking
HOL = Head-of-line blocking
A common problem related to data load.
BEEP avoids HOL blocking through its framing design (SEQ frames and sliding windows for flow control)
Vortex needs AXL, an XML 1.0 implementation optimized for performance and low memory usage.
Vortex contains the XML-RPC Profile and tools.
Create RPC interface
Add two values
Create the interface with IDL
IDL = Interface Definition Language
Supported data types
Integer defintion, 4 byte signed integer (-21)
boolean definition (1/axl_true, 0/axl_false)
double precision signed floating point number (-412.12)
date/time (currently not supported)
base64 coded string
combined named values of different types (Members)
a container for values of different types (including arrays)
Use generated RPC library
TLS/SASL can be used to secure the
include automatically generated library.
Open BEEP connection.
Close BEEP connection
Create interface and RPC server
Use client library
Install Vortex and AXL on Linux (Debian).
Describe interface and generate code with XML-RPC-GEN automatically.
Use automatically created client library and test the result.
The solution for cross platform, fast and reliable peer to peer networks.
no framing support
Head of Line problem (HOL)
one request blocks the rest
no Quality of Service support (QoS)
no bandwidth management
Existing profiles are not enough .... !
custom load calculation