[zeromq-dev] zmq_setsockopt() returning invalid argument

Whitney Jackson whjackson at gmail.com
Sun Feb 17 20:35:17 CET 2013


void *sub = zmq_socket(context,ZMQ_SUB)

not

void *sub = zmq_socket(context,ZMQ_SUBSCRIBE)


On Sat, Feb 16, 2013 at 10:33 PM, Min <miniway at gmail.com> wrote:

> Hi
>
> You need to set socket options before connect.
>
> Thanks
> Min
>
> 2013년 2월 17일 일요일에 suraj nellikar님이 작성:
>
> Hi,
>> I am using zmq 3.2 library on Ubuntu (32 bit machine). I am trying to run
>> a test PUB-SUB model but the client is failing to set the sockopt to
>> ZMQ_SUBSCRIBE. Any idea what am I doing wrong here?
>>
>> Here's the snippet of the code.
>> main() {
>>     void *context = zmq_ctx_new();
>>     void *req = zmq_socket(context,ZMQ_REQ);
>>     void *sub = zmq_socket(context,ZMQ_SUBSCRIBE);
>>
>>     int rc = zmq_connect(req,"tcp://127.0.0.1:5555");
>>     printf("req connect, rc = %d\n",rc);
>>     rc = zmq_connect(sub,"tcp://192.168.72.130:6666");
>>     printf("sub connect, rc = %d\n",rc);
>>     uint64_t affinity = 1;
>>     rc = zmq_setsockopt (sub, ZMQ_AFFINITY, &affinity, sizeof affinity);
>>       //This works only when I use uint64_t for affinity. It fails for int.
>>     printf("setsockopt, rc = %d, errno = %s\n",rc,strerror(errno));
>>     rc = zmq_setsockopt(sub,ZMQ_SUBSCRIBE,"",0);
>>              //This always fails! rc is always -1
>>     printf("setsockopt, ZMQ_SUBSCRIBE = %d,rc = %d, errno =
>> %s\n",ZMQ_SUBSCRIBE,rc,strerror(errno));
>>
>> Thanks.
>>
>
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