Pjlib Implementation Question

[peterapiit@xxxxxxxxx (Wong Peter)]

Hello to all, i have created a sample program from documentation.

My error is
pjsua_acc.c
1. Unable to create/send Register : Object is busy [PJSIP_BUSY]
2. SIP Registratation failed status = 503, service unavailable

My SIP account is PeterAPIIT at iptel.org and password is
wlx_4046.


Question:
1. What the cb structure does ?
2. What is Media State ?
3. What to do when my application make VOIP call behind a router or proxy ?
University network.
4. What else i need to do in order to complete a simple VOIP application ?
5. How to redirect console output to file ?
6. What is credit count ?
7. What is realm and digest ?
8. What pjsua_acc_config does ?
It is use to configure the SIP account in case i have several accounts.
9. Where pjsua_acc_add add the account to ?
10. What 200 represent in pjsua_call_answer(callID, 200, NULL, NULL);
11. What this function does ?
void ResponseMediaState(pjsua_call_id callID)
{
 pjsua_call_info callInfo;

 pjsua_call_get_info(callID, &callInfo);

 if (callInfo.media_status == PJSUA_CALL_MEDIA_ACTIVE)
 {
  // When media is active, connect call to sound device.
  pjsua_conf_connect(callInfo.conf_slot, 0);
  pjsua_conf_connect(0, callInfo.conf_slot);
 }

}

[code]
#include <iostream>

#include <pjsua-lib/pjsua.h>



using namespace std;


// Extra Include
#include <pjlib.h>
#include <pjlib-util.h>
#include <pjnath.h>
#include <pjsip.h>
#include <pjsip_ua.h>
#include <pjsip_simple.h>
#include <pjmedia.h>
#include <pjmedia-codec.h>

#define LOGFILE "D:\\C++\\Test\\Log.txt"


// What to do when Incoming Call
void ResponseIncomingCall(pjsua_acc_id, pjsua_call_id,
                   pjsip_rx_data*);

// What to do when Media State change
void ResponseMediaState(pjsua_call_id);

// What to do when Call State change
void ResponseCallState(pjsua_call_id, pjsip_event*);

// =============================================
int main()
{
 pjsua_acc_id accID = 0;
 pj_status_t status;

 // Initialize pjlib library
 status = pjsua_create();
 if (status != PJ_SUCCESS)
 {
  cout << "Error Creating Pjsua socket";
 }

 pjsua_config cfg;
 pjsua_logging_config logCfg;

 // Init pjsua config and pjsua Logging
 pjsua_config_default(&cfg);
 pjsua_logging_config_default(&logCfg);

 // cfg.stun_srv;
 cfg.cb.on_incoming_call = &ResponseIncomingCall;
 cfg.cb.on_call_media_state = &ResponseMediaState;
 cfg.cb.on_call_state = &ResponseCallState;
 cfg.hangup_forked_call = PJ_TRUE;

 logCfg.console_level = 2;
 logCfg.decor;

 // Initialize pjsua
 status = pjsua_init(&cfg, &logCfg, NULL);
 if (status != PJ_SUCCESS)
 {
  cout << "\nError Initialize pjsua";
 }

 // To set VOIP transport Mode -UDP/TCP/TLS/SCTP
 pjsua_transport_config transportCfg;

 pjsua_transport_config_default(&transportCfg);
 transportCfg.port = 5060;
 status = pjsua_transport_create(PJSIP_TRANSPORT_UDP, &transportCfg, 0);

 if (status != PJ_SUCCESS)
 {
  cout << "Error Creating Pjsua transport mode";
 }

 // Start Pjsua
 status = pjsua_start();
 if (status != PJ_SUCCESS)
 {
  cout << "\nError start pjsua\n\n";
 }

 // Register SIP Account
 pjsua_acc_config accountCfg;
 pjsua_acc_config_default(&accountCfg);

 accountCfg.id = pj_str("sip:PeterAPIIT at iptel.org<sip%3APeterAPIIT at iptel.org>
");
 accountCfg.reg_uri = pj_str("sip:iptel.org");
 accountCfg.cred_count = 1;
 accountCfg.cred_info[0].realm = pj_str("iptel.org");
 accountCfg.cred_info[0].scheme = pj_str("digest");
 accountCfg.cred_info[0].username = pj_str("Peter_APIIT");
 accountCfg.cred_info[0].data_type = PJSIP_CRED_DATA_PLAIN_PASSWD;
 accountCfg.cred_info[0].data = pj_str("wlx_4046");

 // Add Account
 status = pjsua_acc_add(&accountCfg, PJ_TRUE, &accID);
 if (status != PJ_SUCCESS)
 {
  cout << "\nError Adding VOIP Account";
 }


 // Make Call
 pj_str_t SIPURL = pj_str("sip:*061600 at ekiga.net");
 status = ::pjsua_call_make_call(accID, &SIPURL, 0, NULL, NULL, NULL);
 if (status != PJ_SUCCESS)
 {
  cout << "Error VOIP Call";
 }

 // Destroy pjlib library
 // Unregister SIP account, Hang up call, Terminate presence subscription
 status = pjsua_destroy();
 if (status != PJ_SUCCESS)
 {
  cout << "Error destroy application library";
 }

 return 0;
}
// =============================================
void ResponseIncomingCall(pjsua_acc_id accID,
    pjsua_call_id callID, pjsip_rx_data* rxData)
{
 pjsua_call_info callInfo;

 PJ_UNUSED_ARG(accID);
 PJ_UNUSED_ARG(rxData);

 pjsua_call_get_info(callID, &callInfo);

 PJ_LOG(3,(LOGFILE, "Incoming call from %.*s!!",
          (int)callInfo.remote_info.slen,
          callInfo.remote_info.ptr));

 pjsua_call_answer(callID, 200, NULL, NULL);

}
// =============================================
void ResponseMediaState(pjsua_call_id callID)
{
 pjsua_call_info callInfo;

 pjsua_call_get_info(callID, &callInfo);

 if (callInfo.media_status == PJSUA_CALL_MEDIA_ACTIVE)
 {
  // When media is active, connect call to sound device.
  pjsua_conf_connect(callInfo.conf_slot, 0);
  pjsua_conf_connect(0, callInfo.conf_slot);
 }

}
// =============================================
void ResponseCallState(pjsua_call_id callID,
             pjsip_event* myEvent)
{
 pjsua_call_info callInfo;

 PJ_UNUSED_ARG(myEvent);

 pjsua_call_get_info(callID, &callInfo);
 PJ_LOG(3,(LOGFILE, "Call %d state=%.*s", callID,
           (int)callInfo.state_text.slen,
           callInfo.state_text.ptr));

}


[/code]


Please help.

Thanks.




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