pushers: add rabbitmq

[CapacitorSet]

Fixes #254.

Pushes JSON messages to a configurable RabbitMQ queue.

Example config:

[channel.rabbitmq]
type="rabbitmq"
address="amqp://guest:guest@localhost:5672/"
queue="honeytrap"

[nl5887]

Seems to be missing github.com/streadway/amqp package. But why is travis not complaining about that?

[CapacitorSet]

https://travis-ci.org/honeytrap/honeytrap/jobs/365278898#L790

I think it's because go get automatically finds the import and downloads the dependency, so it doesn't need to be specified explicitly (unlike eg. with godep).

[nl5887]

We're using vendorized packages using dep. Could you run dep ensure to keep the vendorized packages up-to-date?

[CapacitorSet]

I ran dep ensure, but now it doesn't compile because of an error in the canary code:

$ go build -v
github.com/honeytrap/honeytrap/event
github.com/honeytrap/honeytrap/vendor/github.com/glycerine/rbuf
github.com/honeytrap/honeytrap/listener/canary/arp
github.com/honeytrap/honeytrap/listener/canary/ethernet
github.com/honeytrap/honeytrap/listener/canary/icmp
github.com/honeytrap/honeytrap/listener/canary/tcp
github.com/honeytrap/honeytrap/pushers
github.com/honeytrap/honeytrap/director/lxc
github.com/honeytrap/honeytrap/director
github.com/honeytrap/honeytrap/listener
github.com/honeytrap/honeytrap/director/forward
github.com/honeytrap/honeytrap/listener/agent
github.com/honeytrap/honeytrap/listener/canary
github.com/honeytrap/honeytrap/listener/socket
github.com/honeytrap/honeytrap/listener/netstack
# github.com/honeytrap/honeytrap/listener/canary
listener/canary/canary_linux.go:984:23: c.buffer.ReadUint32 undefined (type *rbuf.FixedSizeRingBuf has no field or method ReadUint32)

I'll look into that later.

[CapacitorSet]

Fixed.

[nl5887]

Looked up the ReadUint32 code, this is the original code:

func (b *FixedSizeRingBuf) ReadUint32() (uint32, error) {
        buff := [2]byte{}

        _, err := b.ReadAndMaybeAdvance(buff[:], true)
        if err != nil {
                return 0, err
        }

        return uint32(buff[0])<<8 + uint32(buff[1]), nil
}

Looks like that the ReadUint32 reads a Uint16 and casts it to a Uint32.

[CapacitorSet]

Whoops, I'll fix that.

[CapacitorSet]

Fixed.

[nl5887]

merged