SNMP-IB is a minimalist non-blocking asynchronous SNMP V1, V2c and V3 client implementation. It implements enough to be able to query information from things and receive traps from things.

I started writing SNMP-IB as a way to get to understand SNMP better, I thought: it calls its self simple it can't be that hard. To an extent getting version 2c implemented was simple, I had a working implementation after an evenings work. Version 3 took a little longer, mainly getting my head around the bat shit crazy design by committee which is version 3. I'll post a bit more on this some time.

I wanted the library to be clean and simple to use. It makes use of Java NIO at the network level and is non-blocking, asynchronous, callback based. One instance (and thread) is capable of efficiently communicating with many devices.

What does it support

SNMP-IB currently supports: Get, GetNext, GetBulk and Set requests for both V1, V2c and V3. It also supports receiving Traps for V1, V2c and V3.

Only the user security model of V3 is supported. MD5 and SHA1 are supported for authentication and DES (56bit) and AES (128bit) are supported for privacy.

The core code is fairly stable, however it's real world exposure to devices is somewhat limited. Mainly being tested against 3COM switches, Aerohive access points and Cisco switches, basically what ever devices I have / have access to.

Using SNMP-IB

A key design goal was creating a simple, clean API which is easy to use, the following will fetch the system description and uptime from two devices: 

// Create the transport which will be used to send our SNMP messages
SNMPTransport transport = SNMPTransport.open();

// A context represents an Agent we are going to contact, or which is going to contact us
SNMPV2Context lcAgent  = transport.openV2Context("127.0.0.1").setCommunity("public");
SNMPV2Context swAgent  = transport.openV2Context("172.30.12.1").setCommunity("public");

// Use the context to send messages
// The callback will be executed when a response to a request is received
lcAgent.get(new OnResponse.LoggingAdapter(), new OnError.LoggingAdapter(), 
            "1.3.6.1.2.1.1.1.0", "1.3.6.1.2.1.1.3.0");
swAgent.get(new OnResponse.LoggingAdapter(), new OnError.LoggingAdapter(), 
            "1.3.6.1.2.1.1.1.0", "1.3.6.1.2.1.1.3.0");

// Run our transport to send and receive messages
transport.run();

The SNMPContext is the key abstraction, use it to send requests to a device and recieve a callback when the response has been received. The callback classes are designed to be useable from Java 8, without taking a dependency on Java 8.

Where can I get it

You can find the code on GitHub it is licensed under the LGPL V3.