Hi,everyone!
I am a new learner for zmq,I am totally confused with the different kinds of
messages and the methods of receiving or sending message.In the guide book,the
methods changed with every several examples.I can not fully understand the
difference between these methods.Here is one test example:
void *context = zmq_ctx_new ();
void *server = zmq_socket (context, ZMQ_ROUTER);
zmq_bind (server, "tcp://192.168.199.152:5671");
void *client = zmq_socket (context, ZMQ_DEALER);
zmq_connect (client, "tcp://192.168.199.152:5671");
s_send(client,"hello");
s_dump(server);
I did not call s_set_id() method ,But why did i receive an identity from
s_dump()????
Here is another test example.
void *context = zmq_ctx_new ();
void *server = zmq_socket (context, ZMQ_ROUTER);
zmq_bind (server, "tcp://192.168.199.152:5671");
void *client = zmq_socket (context, ZMQ_DEALER);
zmq_connect (client, "tcp://192.168.199.152:5671");
s_send(client,"hello");
s_recv(server);
s_recv(server);
Yes, I call s_recv() for two times.For the first time,there is a null
string,for the second time,I get "hello".So how the null string can
come???According to the Guide book, The REQ/REP socket will insert a null
delimiter into message before data by default.But here i am using ROUTER/DEALER
and i did not add a null delimiter.So where did the null delimiter come
from??Actually,I thought i should receive an identity randomly generated by
ROUTER socket for the specific connection for the first receive.But it turns
out to be a NULL string.What makes the result so different between the above
two examples???Who can explain all these weird things for me ???Thanks so
much.Cause this reallly drives me creazy especially when i learn
CZMQ!!!!!(Another binding for zmq again!Oh god!)
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