Hi,
I am learning zeroMQ and have implemented simple XSUB/XPUB proxy as outlined in
the guide.
I have a SUB client that consumes 10 messages and exits. When that happens,
there is a crash in XSUB/XPUB zmq_proxy function on the line highlighted below.
Has anybody else seen this and is this a bug that should be fixed? The data is
NULL and size_ is 0.
void zmq::xpub_t::send_unsubscription (unsigned char *data_, size_t size_,
void *arg_)
{
xpub_t *self = (xpub_t*) arg_;
if (self->options.type != ZMQ_PUB) {
// Place the unsubscription to the queue of pending
(un)sunscriptions
// to be retrived by the user later on.
blob_t unsub (size_ + 1, 0);
unsub [0] = 0;
if (size_ > 0) <<---- Added check to prevent crash
memcpy (&unsub [1], data_, size_); <<-----------------
self->pending.push_back (unsub);
}
}
Thanks,
Katerina
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