Efficient, scalable, and flexible Java implementation of the Short Messaging Peer to Peer Protocol (SMPP). This library supports the following SMPP protocol versions:

• 3.3
• 3.4
• most of 5.0

This library's implementation takes advantage of non-blocking (NIO) sockets to support thousands of binds using minimal resources. It can be used to implement either the server, client, or both sides of the SMPP protocol. We use it internally at Twitter for both. Both synchronous or asynchronous request modes can be supported on an SMPP session. Clients and servers can use TLS/SSL to provide communication transport security.

The library has been tested and certified with hundreds of mobile operators and suppliers around the world. It's effective at being flexible with SMPP specifications that aren't truly compliant.

SMPP is notorious for having slight differences depending on the vendor. This library attempts to ensure that the internal PDU parser never breaks regardless of vendor.

This library was originally developed by Cloudhopper, Inc. in 2008. Cloudhopper was acquired by Twitter in April 2010. The main author of this library, Joe Lauer, left Twitter in April 2013. While folks at Twitter still contribute and maintain this library, Joe is now with Mfizz, Inc. Mfizz actively sponsors this project in conjunction with Twitter. If you have any commercial questions/ideas pertaining to this library, feel free to reach out to Mfizz.

• Joe Lauer (Twitter: @jjlauer)
• Garth Patil (Twitter: @trg)

Library versions >= 5.0.0 are now published to the Maven Central Repository. Just add the following dependency to your project maven pom.xml:

<dependency>
  <groupId>com.cloudhopper</groupId>
  <artifactId>ch-smpp</artifactId>
  <version>[5.0.0,)</version>
</dependency>

There are numerous examples of how to use various parts of this library:

src/test/java/com/cloudhopper/commons/util/demo

To run some of the samples, there is a Makefile to simplify the syntax required by Maven:

make client
make server
make performance-client
make simulator
make rebind
make parser
make dlr
make ssl-client
make ssl-server

On Windows, the examples can run with nmake instead of make.

The easiest way to get started is to try out our server and client or ssl-server and ssl-client examples. Open up two shells. In the first shell, run:

make server

In the second shell, run:

make client

You'll see the client bind to the server and a few different type of requests exchanged back and forth.

Copyright (C) 2010-2013 Twitter, Inc.

This work is licensed under the Apache License, Version 2.0. See LICENSE for details.