Problem with sending structures over a socket

I've a problem with sending a structure of the type pkt over my
connected socket. I've not too much experience in programming C/C++.
Thus, I've no clue what the problem could be. I've spent quite a lot of
time in this but didn't got the problem. I'm using sendmsg() and
recvmsg(). Both seems to work. But when I try to access the received
data, I recognize that the results are completely wrong (probably
initial values instead of received data). Can anybody tell me my
mistake? Would be great!

CLIENT:

int main ( int argc, int argv[] )
{
    struct msghdr msg;
    struct iovec iov[1];
    struct pkt {
        int a;
        int b;
    } p ;
    p.a = 123;
    p.b = 234;

    iov[0].iov_base = &p;
    iov[0].iov_len = sizeof(p);

    try
    {
        ClientSocket client_socket ( "localhost", 30000 );

        std::string reply;
        std::string message;

        try
        {
            msg.msg_iov = iov ;
            msg.msg_iovlen = 1 ;
            msg.msg_name = NULL ;
            msg.msg_namelen = 0 ;
            msg.msg_control = (caddr_t) &p ;
   msg.msg_controllen = sizeof (struct pkt) ;
   msg.msg_flags = 0 ;

            client_socket << msg ;
        }
....

SERVER:

int main ( int argc, int argv[] )
{
    struct iovec iov[1];
    struct msghdr inmessage;
    char * buffer_rcv;

    struct pkt {
        int a;
        int b;
    } inp ;

    try
    {
        // Create the socket
        ServerSocket server ( 30000 ) ;

        while ( true )
        {
            ServerSocket new_sock ;
            server.accept ( new_sock ) ;

            try
            {
                while ( true )
                {
                    buffer_rcv = (char*)memset(&inmessage, 0, sizeof(inmessage));

                    iov[0].iov_base = buffer_rcv;
                    iov[0].iov_len = sizeof(inmessage);

                    inmessage.msg_iov = iov;
                    inmessage.msg_iovlen = 1;
                    inmessage.msg_name = NULL;
                    inmessage.msg_namelen = 0;
                    inmessage.msg_control = (caddr_t) &inp;
                    inmessage.msg_controllen = sizeof (struct pkt);
                    inmessage.msg_flags = 0;

                    new_sock >> inmessage;

                    std::cout << "inp.a: '" << inp.a << "'" << endl; // returns
134522371
                    std::cout << "inp.b: '" << inp.b << "'" << endl; // 134522371 too

.....