void OpenTxSimulator::stop()
{
StopMainThread();
#if defined(CPUARM)
StopAudioThread();
#endif
StopEepromThread();
}
//////////////////////////////////////////////////////
//This fucntion implements the state transitions for
//SIP messages coming from the network.
int ProcessSipMsg(UCHAR* rxStr, char* result)
{
if (!(rxStr && result)) return -1;
memset(result, 0, MAX_STR_LEN);
int msgType = 0;
char* msg = (char*)rxStr;
char msgExtra[MAX_STR_LEN]={0};
msgType = GetSockMsgType(msg, msgExtra);
if (msgType < 0)
{
//Some non SIP message arrived here. Ignore.
return -1;
}
/* change the mode only if it is none; otherwise leave it as it is */
if (g_sip_mode==SIP_NONE && msgType==MSG_INVITE)
g_sip_mode =SIP_SERVER;
/* client */
if (g_sip_mode == SIP_CLIENT)
{
if (g_sip_state==SIP_IDLE)
{
printf("Invalid condition in the state machine!\n");
return -1;
/*
if (msgType==MSG_INVITE)
{
}
else if (msgType==MSG_BYE)
{
}
else if (msgType==MSG_ACK)
{
}
else if (msgType==MSG_RESPONSE)
{
}
*/
}
else if (g_sip_state==SIP_CONX_PENDING)
{
if (msgType==MSG_INVITE)
{
//486 busy
sprintf((char*)g_txBuffer, RESPONSE_MSG, 486, "Busy", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
}
else if (msgType==MSG_BYE)
{
printf("Invalid condition in the state machine!\n");
return -1;
}
else if (msgType==MSG_ACK)
{
printf("Invalid condition in the state machine!\n");
return -1;
}
else if (msgType==MSG_RESPONSE)
{
int code = atoi(msgExtra);
switch (code/100)
{
case 1://1xx message
strcpy(result, msgExtra);
return 0;
case 2:
{
sprintf((char*)g_txBuffer, ACK_HDR, g_SessionData.ToAdrs, g_SessionData.MyHost, SIP_PORT,
g_SessionData.From, g_SessionData.FromAdrs, g_SessionData.To, g_SessionData.ToAdrs,
g_SessionData.CallID, ++g_sip_seq);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
g_sip_state = SIP_CONNECTED;
if (oSocRTP.Initialize(g_SessionData.RemoteHost, RTP_PORT, RTP_PORT) < 0)
{
strcpy(result, "Error initializing RTP socket..");
g_sip_done = true;
return -1;
}
//g_run_rtp = true;
StartAudioThread();
strcpy(result, "Remote user has accepted your invite. Starting voice session....");
}
break;
case 3:
strcpy(result, msgExtra);
return 0;
case 4:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
case 5:
strcpy(result, msgExtra);
return 0;
case 6:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
default:
break;
}
}
}
else if (g_sip_state==SIP_CONNECTED)
{
if (msgType==MSG_INVITE)
{
sprintf((char*)g_txBuffer, RESPONSE_MSG, 486, "Busy", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
}
else if (msgType==MSG_BYE)
{
//g_run_rtp = false;
sprintf((char*)g_txBuffer, RESPONSE_MSG, 200, "OK", g_SessionData.remoteRestHdr, g_SessionData.remoteRestBdy);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
StopAudioThread();
oSocSIP.ClearRemoteInfo();
ClearSessionData();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
strcpy(result, "Remote party says BYE. Closing connection..");
}
else if (msgType==MSG_ACK)
{
printf("Invalid state\n"); return -1;
}
else if (msgType==MSG_RESPONSE)
{
int code = atoi(msgExtra);
switch (code/100)
{
case 1://1xx message
strcpy(result, msgExtra);
return 0;
case 2:
{
//Nothing..
}
break;
case 3:
strcpy(result, msgExtra);
return 0;
case 4:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
case 5:
strcpy(result, msgExtra);
return 0;
case 6:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
default:
break;
}
}
}
else if (g_sip_state==SIP_DISCONX_PENDING)
{
if (msgType==MSG_INVITE)
{
sprintf((char*)g_txBuffer, RESPONSE_MSG, 486, "Busy", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
}
else if (msgType==MSG_BYE)
{
//g_run_rtp = false;
//g_au_started= true;
sprintf((char*)g_txBuffer, RESPONSE_MSG, 200, "OK", g_SessionData.remoteRestHdr, g_SessionData.remoteRestBdy);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
StopAudioThread();
oSocSIP.ClearRemoteInfo();
ClearSessionData();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
strcpy(result, "Remote party says BYE. Closing connection..");
}
else if (msgType==MSG_ACK)
{
printf("Invalid state\n"); return -1;
}
else if (msgType==MSG_RESPONSE)
{
int code = atoi(msgExtra);
switch (code/100)
{
case 1://1xx message
strcpy(result, msgExtra);
return 0;
case 2:
{
oSocSIP.ClearRemoteInfo();
ClearSessionData();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
}
break;
case 3:
strcpy(result, msgExtra);
return 0;
case 4:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
case 5:
strcpy(result, msgExtra);
return 0;
case 6:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
default:
break;
}
}
}
}
else
/* server */
if (g_sip_mode == SIP_SERVER)
{
if (g_sip_state==SIP_IDLE)
{
if (msgType==MSG_INVITE)
{
CopySessionData(rxStr);
oSocSIP.SetRemoteInfo(g_SessionData.RemoteHost, SIP_PORT );
sprintf((char*)g_txBuffer, RESPONSE_MSG, 180, "Ringing", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
printf("You have got an incoming call from %s. Do you want to accept? [accept/reject]", g_SessionData.RemoteHost);fflush(stdout);
g_sip_state = SIP_CONX_PENDING;
return 0;
}
else if (msgType==MSG_BYE)
{
//invalid...
}
else if (msgType==MSG_ACK)
{
//invalid..
}
else if (msgType==MSG_RESPONSE)
{
//invalid..
}
}
else if (g_sip_state==SIP_CONX_PENDING)
{
if (msgType==MSG_INVITE)
{
sprintf((char*)g_txBuffer, RESPONSE_MSG, 486, "Busy", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
}
else if (msgType==MSG_BYE)
{
printf("Invalid state\n"); return -1;
}
else if (msgType==MSG_ACK)
{
sprintf(result, "Remote user at [%s] confirmed your acceptance. Starting audio communication...", g_SessionData.RemoteHost);
if (oSocRTP.Initialize(g_SessionData.RemoteHost, RTP_PORT, RTP_PORT) < 0)
{
strcpy(result, "Error initializing RTP socket..");
g_sip_done = true;
return -1;
}
//g_run_rtp = true;
StartAudioThread();
g_sip_state = SIP_CONNECTED;
}
else if (msgType==MSG_RESPONSE)
{
int code = atoi(msgExtra);
switch (code/100)
{
case 1://1xx message
//invalid
return 0;
case 2:
{
//invalid
}
break;
case 3:
//invalid
return 0;
case 4:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
case 5:
strcpy(result, msgExtra);
return 0;
case 6:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
default:
break;
}
}
}
else if (g_sip_state==SIP_CONNECTED)
{
if (msgType==MSG_INVITE)
{
sprintf((char*)g_txBuffer, RESPONSE_MSG, 486, "Busy", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
}
else if (msgType==MSG_BYE)
{
//g_run_rtp = false;
StopAudioThread();
//g_au_started= true;
sprintf((char*)g_txBuffer, RESPONSE_MSG, 200, "OK", g_SessionData.remoteRestHdr, g_SessionData.remoteRestBdy);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
oSocSIP.ClearRemoteInfo();
ClearSessionData();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
strcpy(result, "Remote party says BYE. Closing connection..");
}
else if (msgType==MSG_ACK)
{
//invalid..
}
else if (msgType==MSG_RESPONSE)
{
int code = atoi(msgExtra);
switch (code/100)
{
case 1://1xx message
//invalid
return 0;
case 2:
{
//invalid
}
break;
case 3:
strcpy(result, msgExtra);
return 0;
case 4:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
case 5:
strcpy(result, msgExtra);
return 0;
case 6:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
default:
break;
}
}
}
else if (g_sip_state==SIP_DISCONX_PENDING)
{
if (msgType==MSG_INVITE)
{
sprintf((char*)g_txBuffer, RESPONSE_MSG, 486, "Busy", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
}
else if (msgType==MSG_BYE)
{
//g_run_rtp = false;
//g_au_started= true;
sprintf((char*)g_txBuffer, RESPONSE_MSG, 200, "OK", g_SessionData.remoteRestHdr, g_SessionData.remoteRestBdy);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
StopAudioThread();
oSocSIP.ClearRemoteInfo();
ClearSessionData();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
strcpy(result, "Remote party says BYE. Closing connection..");
}
else if (msgType==MSG_ACK)
{
//invalid..
}
else if (msgType==MSG_RESPONSE)
{
int code = atoi(msgExtra);
switch (code/100)
{
case 1://1xx message
strcpy(result, msgExtra);
return 0;
case 2:
{
oSocSIP.ClearRemoteInfo();
ClearSessionData();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
}
break;
case 3:
strcpy(result, msgExtra);
return 0;
case 4:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
case 5:
strcpy(result, msgExtra);
return 0;
case 6:
strcpy(result, msgExtra);
ClearSessionData();
oSocSIP.ClearRemoteInfo();
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
return -1;
default:
break;
}
}
}
}
return 0;
}
///////////////////////////////////////////////////
//This function implements the state diagram for
//user inputs
int ProcessUserCommand(char* command, char* result)
{
if (!(command && result)) return -1;
memset(result, 0, MAX_STR_LEN);
int cmdType = 0;
char msgExtra[MAX_STR_LEN];
cmdType = GetCommandType(command, msgExtra);
if (cmdType < 0)
{
strcpy(result,"Please use one of the following commands:\n"
" invite user@host : To initiate a session with host\n"
" accept : To accept a request from remote host\n"
" reject : To reject a request from remote host\n"
" bye : To terminate an open session\n"
" exit : To terminate the program\n");
return -1;
}
/* change the mode only if it is none; otherwise leave it as it is */
if (g_sip_mode==SIP_NONE && cmdType==CMD_INVITE)
g_sip_mode =SIP_CLIENT;
/* client */
if (g_sip_mode == SIP_CLIENT)
{
if (g_sip_state==SIP_IDLE)
{
if (cmdType==CMD_INVITE)
{ //Client at idle receives invite user@host: createSession;SetRemote sockaddr in oSocSIP, cook buffer and send.
CreateSessionData(msgExtra);
if (oSocSIP.SetRemoteInfo(g_SessionData.RemoteHost, SIP_PORT)<0)
{
strcpy(result, "Invalid host entered");
return -1;
}
sprintf((char*)g___Buffer, INVITE_MSG, g_SessionData.From, (DWORD)lrand48(), (DWORD)lrand48(), g_SessionData.MyHost, g_SessionData.MyHost, SIP_PORT);
int c_len = strlen((char*)g___Buffer);
sprintf((char*)g_txBuffer, INVITE_HDR, g_SessionData.ToAdrs, g_SessionData.MyHost, SIP_PORT, g_SessionData.From, g_SessionData.FromAdrs, g_SessionData.To, g_SessionData.ToAdrs, g_SessionData.CallID, ++g_sip_seq, c_len);
strcat((char*)g_txBuffer, (char*)g___Buffer);
c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
g_sip_state = SIP_CONX_PENDING;
}
else if (cmdType==CMD_ACCEPT)
{
strcpy(result, "Nothing to accept");
return -1;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "Nothing to reject");
return -1;
}
else if (cmdType==CMD_BYE)
{
strcpy(result, "No active session to close");
return -1;
}
else if (cmdType==CMD_EXIT)
{
g_sip_done = true;
//g_run_rtp = false;
StopAudioThread();
return 0;
}
}
else if (g_sip_state==SIP_CONX_PENDING)
{
if (cmdType==CMD_INVITE)
{
strcpy(result, "Connection already in progress. Cannot invite now.");
return -1;
}
else if (cmdType==CMD_ACCEPT)
{
strcpy(result, "Nothing to accept");
return -1;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "Nothing to reject");
return -1;
}
else if (cmdType==CMD_BYE)
{
strcpy(result, "Connection in progress. Please try again");
return -1;
}
else if (cmdType==CMD_EXIT)
{
strcpy(result, "Connection in progress. Please try again");
return -1;
}
}
else if (g_sip_state==SIP_CONNECTED)
{
if (cmdType==CMD_INVITE)
{
strcpy(result, "You are already connected. Please close this session (with bye) first before initiating a new session.");
return -1;
}
else if (cmdType==CMD_ACCEPT)
{
strcpy(result, "You are already connected. Nothing to accept");
return -1;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "You are already connected. Nothing to reject");
return -1;
}
else if (cmdType==CMD_BYE)
{
sprintf((char*)g_txBuffer, BYE_HDR, g_SessionData.ToAdrs, g_SessionData.MyHost, SIP_PORT, g_SessionData.From, g_SessionData.FromAdrs,
g_SessionData.To, g_SessionData.ToAdrs, g_SessionData.CallID, ++g_sip_seq);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
//g_run_rtp = false;
StopAudioThread();
//g_au_started = true;
g_sip_state = SIP_DISCONX_PENDING;
}
else if (cmdType==CMD_EXIT)
{
strcpy(result, "You are currently connected. Please close this session (with bye) first, and then exit.");
return -1;
}
}
else if (g_sip_state==SIP_DISCONX_PENDING)
{
if (cmdType==CMD_INVITE)
{
strcpy(result, "Disconnection in progress. Please try again.");
return -1;
}
else if (cmdType==CMD_ACCEPT)
{
strcpy(result, "Disconnection in progress. Nothing to accept.");
return -1;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "Disconnection in progress. Nothing to reject.");
return -1;
}
else if (cmdType==CMD_BYE)
{
strcpy(result, "Disconnection in progress. Please try again.");
return -1;
}
else if (cmdType==CMD_EXIT)
{
strcpy(result, "Disconnection in progress. Please try again.");
return -1;
}
}
}
else
/* server mode */
if (g_sip_mode == SIP_SERVER)
{
if (g_sip_state==SIP_IDLE)
{
if (cmdType==CMD_INVITE)
{
printf("Invalid condition in the state machine!\n");
return -1;
}
else if (cmdType==CMD_ACCEPT)
{
strcpy(result, "Nothing to accept");
return -1;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "Nothing to reject");
return -1;
}
else if (cmdType==CMD_BYE)
{
strcpy(result, "No active session to close");
return -1;
}
else if (cmdType==CMD_EXIT)
{
g_sip_done = true;
//g_run_rtp = false;
StopAudioThread();
return 0;
}
}
else if (g_sip_state==SIP_CONX_PENDING)
{
if (cmdType==CMD_INVITE)
{
strcpy(result, "Connection already in progress. Cannot invite now.");
return -1;
}
else if (cmdType==CMD_ACCEPT)
{
sprintf((char*)g_txBuffer, RESPONSE_MSG, 200, "OK", g_SessionData.remoteRestHdr, g_SessionData.remoteRestBdy);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
}
else if (cmdType==CMD_REJECT)
{
sprintf((char*)g_txBuffer, RESPONSE_MSG, 603, "Decline", g_SessionData.remoteRestHdr, "\0");
int c_len = strlen((char*)g_txBuffer);
c_len--;
oSocSIP.SendTo(g_txBuffer, &c_len);
g_sip_state = SIP_IDLE;
g_sip_mode = SIP_NONE;
}
else if (cmdType==CMD_BYE)
{
printf("Invalid condition in the state machine!\n");
return -1;
}
else if (cmdType==CMD_EXIT)
{
strcpy(result, "Connection in progress. Please try again");
return -1;
}
}
else if (g_sip_state==SIP_CONNECTED)
{
if (cmdType==CMD_INVITE)
{
strcpy(result, "You are already connected. Please close this session (with bye) first before initiating a new session.");
return -1;
}
else if (cmdType==CMD_ACCEPT)
{
strcpy(result, "You are already connected. Nothing to accept");
return -1;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "You are already connected. Nothing to reject");
return -1;
}
else if (cmdType==CMD_BYE)
{
/*
This is what i actually need to do. but resorting to short cut @@@@
sprintf(g_txBuffer, BYE_HDR, g_SessionData.ToAdrs, g_SessionData.MyHost, g_SessionData.From, g_SessionData.FromAdrs,
g_SessionData.To, g_SessionData.ToAdrs, g_SessionData.CallID, ++g_sip_seq);
*/
sprintf((char*)g_txBuffer, "BYE %s SIP/2.0\n%s\n", g_SessionData.uri, g_SessionData.remoteRestHdr);
int c_len = strlen((char*)g_txBuffer);
oSocSIP.SendTo(g_txBuffer, &c_len);
// g_run_rtp = false;
StopAudioThread();
//g_au_started= true;
g_sip_state = SIP_DISCONX_PENDING;
}
else if (cmdType==CMD_EXIT)
{
strcpy(result, "You are currently connected. Please close this session (with bye) first, and then exit.");
return -1;
}
}
else if (g_sip_state==SIP_DISCONX_PENDING)
{
if (cmdType==CMD_INVITE)
{
strcpy(result, "Disconnection in progress. Please try again.");
return -1;
}
else if (cmdType==CMD_ACCEPT)
{
strcpy(result, "Disconnection in progress. Nothing to accept.");
return -1;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "Disconnection in progress. Nothing to reject.");
return -1;
}
else if (cmdType==CMD_BYE)
{
strcpy(result, "Disconnection in progress. Please try again.");
return -1;
}
else if (cmdType==CMD_EXIT)
{
strcpy(result, "Disconnection in progress. Please try again.");
return -1;
}
}
}
else
if (g_sip_mode == SIP_NONE)
{
if( g_sip_state == SIP_IDLE)
{
if (cmdType==CMD_ACCEPT)
{
strcpy(result, "Nothing to accept");
return 0;
}
else if (cmdType==CMD_REJECT)
{
strcpy(result, "Nothing to accept");
return 0;
}
else if (cmdType==CMD_EXIT)
{
g_sip_done = true;
//g_run_rtp = false;
StopAudioThread();
return 0;
}
}
}
return 0;
}
