[zeromq-dev] Router-Dealer Example not working in C on 4.0.4 ZMQ release

[Pieter Hintjens]

You're not reading the man pages, nor documentation, nor example
output properly.

The ROUTER gives you a two-frame message. The first is a routing id
frame for replies. The second is the content the DEALER sent.

On Wed, Jul 23, 2014 at 9:50 PM, Badhrinath Manoharan <badhrim at gmail.com> wrote:
> Hi Peter,
>
> Thanks  a lot for your response. I was able to try the same as what you had
> mentioned. I used the raw Zeromq APIs instead of the C binds. Below is my
> code and the result that I get when. I still don't see them working. Please
> let me know where I am going wrong here.
>
> #include </usr/local/include/zmq.h>
> #include <stdio.h>
> #include <unistd.h>
> #include <string.h>
> #include <assert.h>
>
> int main (void)
> {
>     char buffer[15];
>     void *context = zmq_ctx_new ();
>     void *router = zmq_socket (context, ZMQ_ROUTER);
>     void *dealer = zmq_socket (context, ZMQ_DEALER);
>
>     memset(buffer, 0, 15);
>     zmq_bind(router, "tcp://127.0.0.1:9990");
>     zmq_connect(dealer, "tcp://127.0.0.1:9990");
>
>     printf("Sending Message from Dealer\n");
>     zmq_send(dealer, "Hello World", 11, 0);
>     printf("Waiting to receive message from Dealer\n");
>     zmq_recv(router, buffer, 15, 0);
>     printf("Received message from Dealer: %s\n", buffer);
>
>     zmq_close(dealer);
>     zmq_close(router);
>     zmq_ctx_destroy(context);
>     return 0;
> }
>
> bash-3.2$ ./zmq_router_dealer
> Sending Message from Dealer
> Waiting to receive message from Dealer
> Received message from Dealer:
> bash-3.2$
>
> Thanks
> Badhri
>
>
> On Wed, Jul 23, 2014 at 11:19 AM, Pieter Hintjens <ph at imatix.com> wrote:
>>
>> There are no known issues, so it's presumably something in your
>> example. The best way to debug such uncertainties is to write a single
>> program that does all the work in one thread, e.g.
>>
>> #include <czmq.h>
>>
>> int main (void)
>> {
>>     zsock_t *router = zsock_new_router ("tcp://127.0.0.1:9990");
>>     zsock_t *dealer = zsock_new_dealer ("tcp://127.0.0.1:9990");
>>
>>     zstr_send (dealer, "Hello World");
>>     zmsg_t *msg = zmsg_recv (router);
>>     zmsg_print (msg);
>>     zmsg_send (&msg, router);
>>     msg = zmsg_recv (dealer);
>>     zmsg_print (msg);
>>
>>     zmsg_destroy (&msg);
>>     zsock_destroy (&router);
>>     zsock_destroy (&dealer);
>>     return 0;
>> }
>>
>> (using CZMQ master with latest API calls)
>>
>> On Wed, Jul 23, 2014 at 8:04 PM, Badhrinath Manoharan <badhrim at gmail.com>
>> wrote:
>> > Hi Zero MQ Team,
>> >
>> > Zero MQ was introduced to me by one of my friends and was trying to get
>> > some
>> > hands on to it. I have been using C for my development. I have been
>> > trying
>> > to execute the examples provided by zeromq.
>> >
>> > Was able to get the REQ - REP, PUB - SUB and PUSH - PULL sockets
>> > working.
>> > However I was not able to get the
>> > REQ - ROUTER - DEALER - REP socket working. I just copy pasted the
>> > examples
>> > provided online
>> >
>> > rrclient: Request-reply client in C
>> > rrworker: Request-reply worker in C
>> > rrbroker: Request-reply broker in C
>> >
>> > I could see the REQ - ROUTER working. However a simple DEALER - REP
>> > socket
>> > does not seem to be working. I don't see the messages received by the
>> > REP
>> > socket. Are there any known issues regarding the ROUTER - DEALER socket.
>> > Could someone help me here?
>> >
>> > Thanks
>> > Badhri
>> >
>> > _______________________________________________
>> > zeromq-dev mailing list
>> > zeromq-dev at lists.zeromq.org
>> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>> >
>> _______________________________________________
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>> zeromq-dev at lists.zeromq.org
>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>
>
>
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