Sending and receiving structure message in ZeroMQ - c++

Question

I've been trying to send and receive structured messages using the push-pull pattern in ZeroMQ since two days, but no luck.
when I tried to print the received message content, it is printing garbage values. Kindly help me with the code.
here is the push code (server)
struct ab{
int a;
char arr[10];
};
void startPublisher()
{
// Prepare our context and publisher
zmq::context_t context (1);
zmq::socket_t publisher (context, zmq::socket_type::push);
publisher.bind("ipc://localsock");
while(1)
{
struct ab *messageB =new struct ab;
messageB->a=0;
strcpy(messageB->arr,"aaaaa");
const int length = sizeof(int)+ strlen("aaaaa") ;
zmq::message_t msg (length);
memcpy (msg.data (), &messageB, sizeof(messageB));
publisher.send(msg, zmq::send_flags::none);
}
}
int main ()
{
std::thread t_push(startPublisher);
t_push.join();
return 0;
}
and here is the pull code (client)
struct ab{
int a;
char arr[10];
};
void pull()
{
zmq::context_t context (1);
zmq::socket_t pull1 (context, zmq::socket_type::pull);
pull1.connect("ipc://localsock");
struct ab *messageB = (struct ab*)malloc(sizeof(struct ab));
const int length = sizeof(int)+ strlen("aaaaa");
while(1)
{
// zmq::message_t message(10);
zmq::message_t msg(length);
pull1.recv(msg);
memcpy ( messageB, msg.data (), sizeof(msg.data()));
std::cout << messageB->a << " " <<(char*)messageB->arr << std::endl;
}
}
int main () {
std::thread t1(pull);
t1.join();
return 0;
}