[zeromq-dev] tcp protocol not supported on socket of type ZMQ_REQ

Jake jake.cobb at gmail.com
Thu Aug 29 17:41:10 CEST 2019

You have an extra colon in your protocol, "tcp:://" should be "tcp://".

On Thu, Aug 29, 2019 at 8:24 AM Tomasz Michalski <tmichalski23 at gmail.com>

> of course here is sock.bind("tcp://*:5555"), not udp
> czw., 29 sie 2019 o 14:19 Tomasz Michalski <tmichalski23 at gmail.com>
> napisał(a):
>> Hi
>> I have problem with usage of zeromq.
>> I am able to create server socket over tcp:
>>     zmq::context_t context(1);
>>     zmq::socket_t sock(context, ZMQ_REP);
>>     try
>>     {
>>         sock.bind("udp://*:5555"); //BTW: ip address of this server is
>>         setDefaultSocketOptions(sock, INFINITY_WAIT_TIME);
>>         ...
>> but I am not able to create tcp socket on the same machine in order to
>> send data:
>> // Socket to talk to server
>>     zmq::context_t context(1);
>>     zmq::socket_t sock (context, ZMQ_REQ);
>>     try
>>     {
>>         sock.connect("tcp:://"); //even if I changed
>> 5555 to 5556 this doesn't work as well
>>         ....
>>     }
>> I get output:
>> Protocol not supported.
>> Both server and client apps are created on machine in
>> different processes. One process is daemon server listener and waits for
>> incoming messages,
>> the other one is invoked from shell by user and tries to send some data
>> to machine But i got this output when creating client
>> socket: protocol not supported and I have no idea how to fix this.
>> I tried also use udp. Here is even worse situation. After I change string
>> "tcp" with "udp" I am not able even to create server socket - get output:
>> The protocol is not compatible with the socket type. I have also no idea
>> how to fix this one.
>> If somebody can help I would be gratefull.
>> Processes are running/started in altera linux environment. Maybe I should
>> check some linux configuration but I am not specialist in it. Nevertheless
>> THERE IS ping between machine and so network is
>> working at all.
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