[reSIProcate-users] How to code this simple SIP session?

[Vijay Mathew <vijay.the.schemer@xxxxxxxxx>]

Hi all,

I want to create a simple SIP client that will do the following
interactions with an existing SIP server:

client                                    server

INVITE   ============>
             <===========      200 OK
ACK      ============>
             <============   SUBSCRIBE
200 OK  =============>
NOTIFY  =============>
            <=============   200 OK
BYE     ==============>
           <==============  200 OK

I tried the following code to start with the INVITE and the ACK. I get
"200 OK" for the INVITE but for the ACK, I am again getting the same
"200 OK" that I got for the INVITE. What did I do wrong?

static SipMessage* receive(SipStack& tu)
{               
        while (true)
        {
                Sleep(100);
                SipMessage *msg = stack.receive();
                if (msg)
                {                               
                        std::cout << *msg << '\n';
                        return msg;
                }               
        }
        return 0;
}

int
main ()
{       
    NameAddr target;
    target.uri().scheme() = "sip";
    target.uri().host() = "192.168.114.211";
    target.uri().port() = 5060;
    target.uri().param(p_transport) = "tcp";

    NameAddr from = target;     
    from.uri().user() = "me";
    from.uri().port() = 5070;           
        
    std::auto_ptr<SipMessage> reg(Helper::makeInvite(target, from));

    reg->header(h_Contacts).clear();
    reg->header(h_Contacts).push_back(from);
    reg->header(h_Vias).front().transport() = Data("tcp");
    reg->header(h_Vias).front().sentHost() = "192.168.114.211";
    reg->header(h_Vias).front().sentPort() = 5070;
        Tokens tokens;
        tokens.push_back(Token(Data("x-com-nice-imm-call-state")));
        reg->header(h_AllowEvents) = tokens;

        std::cout << *reg << '\n';

        SipStack stack;
        stack.addTransport(TCP, 5070);
        StackThread stackThread(stack);
        stackThread.run();
        stack.send(*reg);

        SipMessage* msg = receive(stack);
        if (msg)
        {
                if (msg->isResponse())
                {
                        std::cout << "REASON=" << msg->getReason() << "\n";     
                                                        
                        std::auto_ptr<SipMessage> 
reg(Helper::makeRequest(target, from, ACK));                  
                        reg->header(h_Contacts).clear();
                        reg->header(h_Contacts).push_back(from);
                        reg->header(h_Vias).front().transport() = Data("tcp");
                        reg->header(h_Vias).front().sentHost() = 
"192.168.114.211";
                        reg->header(h_Vias).front().sentPort() = 5070;          
                        
                        reg->header(h_CallID) = msg->header(h_CallId);
                        std::cout << *reg << '\n';
                        delete msg;
                        msg = 0;
                        stack.send(*reg);
                }
                else
                {
                        std::cout << "MSG is not a response\n";
                }
        }

        msg = receive(stack);
        if (msg)
        {
                if (msg->isResponse())
                {
                        std::cout << "REASON=" << msg->getReason() << "\n";     
        
                        delete msg;
                        // std::auto_ptr<SipMessage> 
reg(Helper::makeRequest(target, from, ACK));
                }
                else
                {
                        std::cout << "MSG is not a response\n";
                }
        }

        return 0;
}

Thanks in advance,

-- Vijay