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XSUB accepts (un)subscriptions in form of messages.

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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
This commit is contained in:
Martin Sustrik
2010-12-05 09:48:52 +01:00
parent c80e7b80cc
commit 2daa0bb49d
4 changed files with 62 additions and 16 deletions
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31
src/sub.cpp
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@@ -17,6 +17,8 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "../include/zmq.h"
#include "sub.hpp"
zmq::sub_t::sub_t (class ctx_t *parent_, uint32_t tid_) :
@@ -27,3 +29,32 @@ zmq::sub_t::sub_t (class ctx_t *parent_, uint32_t tid_) :
zmq::sub_t::~sub_t ()
{
}
int zmq::sub_t::xsetsockopt (int option_, const void *optval_,
size_t optvallen_)
{
if (option_ != ZMQ_SUBSCRIBE && option_ != ZMQ_UNSUBSCRIBE) {
errno = EINVAL;
return -1;
}
// Create the subscription message.
zmq_msg_t msg;
zmq_msg_init_size (&msg, optvallen_ + 1);
unsigned char *data = (unsigned char*) zmq_msg_data (&msg);
if (option_ == ZMQ_SUBSCRIBE)
*data = 1;
else if (option_ == ZMQ_UNSUBSCRIBE)
*data = 0;
memcpy (data + 1, optval_, optvallen_);
// Pass it further on in the stack.
int err;
int rc = xsend (&msg, 0);
if (rc != 0)
err = errno;
zmq_msg_close (&msg);
if (rc != 0)
errno = err;
return rc;
}