網際網路電話系統作業一程式說明文件資工四 B 徐瑞澤程式架構與寫法介紹 :

Size: px

Start display at page:

Download "網際網路電話系統作業一程式說明文件資工四 B 徐瑞澤程式架構與寫法介紹 :"

Ethelbert Newman
6 years ago
Views:

1 網際網路電話系統作業一程式說明文件資工四 B 徐瑞澤程式架構與寫法介紹 : 助教您好, 這次的作業我按照投影片上的說明在 SimpRTPDlg.cpp 中的 CSimRTPDlg 程序加入 cclrtpstartup(2) 以初始化 RTP 的物件並設定最大 channel 數為 2, 接著由於我有做使用者可以指定 port 的功能, 所以 RTPOpenPort() 這邊先不做, 等到設定 peeraddress 的時候會再執行接著在 OnOK 程序中利用以下程式碼 : m_waveioobj->wavinclose(); m_waveioobj->wavoutclose(); 把 WavIO 關閉, 然後我加入以下的程式碼處理使用者自訂的 port: for (i=0; i<10; i++) assign_port[i] = '\0'; i = 0; while(ip[i]!= ':' && i < 100) i += 1; if (i == 100) flag = 1; newport = 9000; if (flag == 0) m = i; j = 0; i += 1; while(ip[i]!= '\0') assign_port[j] = IP[i]; i += 1; j += 1; newport = atoi(assign_port); for(i=m; i<100; i++) IP[i] = '\0';

2 其中 newport 是我在 SimRTPDlg.cpp 檔案開頭自訂的一個 Global Variable, 目的是儲存使用者自訂的 Port, 接著執行 RTPPeerConnect(IP, newport) 另外為了達到使用者自訂 Port 的功能, 我修改了 cclrtp.c 檔案, 其中 cclrtpopen 修改如下 : RETCODE cclrtpopen(int channel, int rtppacketsiz, int port) if( channel<0 channel>=max_rtp_chans ) return -1; if( rtp[channel] ) RTP_PACKET_SIZ[channel] = rtppacketsiz; return 1; rtp[channel] = rtp_open(port,0); if(!rtp[channel] ) return -1; rtcp[channel] = rtcp_open(port+1,0); if(!rtcp[channel] ) return -1; return 0; 我在這個函數的參數列尾端新增了一個 port 的變數, 以記錄使用者自訂的 Port Number, 另外在執行 rtp_open() 與 rtcp_open() 的地方, 將第一個參數換成 port 與 port+1, 這樣 Local 端的 port 才可以設成使用者自訂的 Port 程式功能與操作方法 : 如上, 使用者輸入對方電腦的 IP 位址, 對方也輸入自己電腦的 IP 位址, 就會使用預設的 Port9000 連線, 如果輸入對方電腦的 IP 位址之後加一個冒號, 後面接上欲使用的 Port 號碼, 對方也輸入自己電腦的 IP 位址加上 Port 號碼, 就可以使用指定的 Port 傳輸資料, 如下是使用 port9500 做傳輸, 圖示如下 :

3 SimRTPDlg.cpp Source Code: // SimRTPDlg.cpp : implementation file // #include "stdafx.h" #include "SimRTP.h" #include "SimRTPDlg.h" #include "cclrtp.c" //#include "WavInOut.cpp" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = FILE ; #endif char IP[100]; int newport = 9000; /////////////////////////////////////////////////////////////////////////// // // CAboutDlg dialog used for App About class CAboutDlg : public CDialog public: CAboutDlg(); // Dialog Data //AFX_DATA(CAboutDlg) enum IDD = IDD_ABOUTBOX ;

4 //AFX_DATA // ClassWizard generated virtual function overrides //AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pdx); //AFX_VIRTUAL // DDX/DDV support // Implementation protected: //AFX_MSG(CAboutDlg) //AFX_MSG DECLARE_MESSAGE_MAP() ; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) //AFX_DATA_INIT(CAboutDlg) //AFX_DATA_INIT void CAboutDlg::DoDataExchange(CDataExchange* pdx) CDialog::DoDataExchange(pDX); //AFX_DATA_MAP(CAboutDlg) //AFX_DATA_MAP BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //AFX_MSG_MAP(CAboutDlg) // No message handlers //AFX_MSG_MAP END_MESSAGE_MAP() /////////////////////////////////////////////////////////////////////////// // // CSimRTPDlg dialog

5 static CSimRTPDlg* csimrtpdlg = NULL; CSimRTPDlg::CSimRTPDlg(CWnd* pparent /*=NULL*/) : CDialog(CSimRTPDlg::IDD, pparent) //AFX_DATA_INIT(CSimRTPDlg) csimrtpdlg = this; //AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hicon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); // //cclrtpstartup add here cclrtpstartup(2); // m_rtpchan=0; m_bufrtp2io=adtbuffernew(4096); m_bufio2rtp=adtbuffernew(4096); m_waveioobj = WavInOut::instance(); m_waveioobj->init(wav2rtp,rtp2wav); // //RTPOpenPort add here //RTPOpenPort(); // m_budp=true; m_btcp=false; m_bcallauto=true; m_flag = TRUE; void CSimRTPDlg::DoDataExchange(CDataExchange* pdx) CDialog::DoDataExchange(pDX); //AFX_DATA_MAP(CSimRTPDlg) DDX_Control(pDX, IDOK, m_ok);

6 DDX_Control(pDX, IDC_EDIT1, m_ip_ctl); //AFX_DATA_MAP BEGIN_MESSAGE_MAP(CSimRTPDlg, CDialog) //AFX_MSG_MAP(CSimRTPDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_EN_CHANGE(IDC_EDIT1, OnChangeEdit1) //AFX_MSG_MAP END_MESSAGE_MAP() /////////////////////////////////////////////////////////////////////////// // // CSimRTPDlg message handlers BOOL CSimRTPDlg::OnInitDialog() CDialog::OnInitDialog(); // Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range. ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* psysmenu = GetSystemMenu(FALSE); if (psysmenu!= NULL) CString straboutmenu; straboutmenu.loadstring(ids_aboutbox); if (!straboutmenu.isempty()) psysmenu->appendmenu(mf_separator); psysmenu->appendmenu(mf_string, IDM_ABOUTBOX, straboutmenu);

7 // Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialog SetIcon(m_hIcon, TRUE); // Set big icon SetIcon(m_hIcon, FALSE); // Set small icon // TODO: Add extra initialization here m_ip_ctl.setfocus(); return TRUE; // return TRUE unless you set the focus to a control void CSimRTPDlg::OnSysCommand(UINT nid, LPARAM lparam) if ((nid & 0xFFF0) == IDM_ABOUTBOX) CAboutDlg dlgabout; dlgabout.domodal(); else CDialog::OnSysCommand(nID, lparam); // If you add a minimize button to your dialog, you will need the code below // to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework. void CSimRTPDlg::OnPaint() if (IsIconic()) CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.getsafehdc(), 0); // Center icon in client rectangle

8 int cxicon = GetSystemMetrics(SM_CXICON); int cyicon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.width() - cxicon + 1) / 2; int y = (rect.height() - cyicon + 1) / 2; // Draw the icon dc.drawicon(x, y, m_hicon); else CDialog::OnPaint(); // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CSimRTPDlg::OnQueryDragIcon() return (HCURSOR) m_hicon; void CSimRTPDlg::OnCancel() // TODO: Add extra cleanup here m_waveioobj->stopplaying(); m_waveioobj->stoprecording(); if(m_waveioobj->iswavinopen) m_waveioobj->wavinclose(); if(m_waveioobj->iswavoutopen) m_waveioobj->wavoutclose(); CDialog::OnCancel(); void CSimRTPDlg::OnChangeEdit1() // TODO: If this is a RICHEDIT control, the control will not

9 // send this notification unless you override the CDialog::OnInitDialog() // function and call CRichEditCtrl().SetEventMask() // with the ENM_CHANGE flag ORed into the mask. // TODO: Add your control notification handler code here void CSimRTPDlg::OnOK() //User specified port stored here char assign_port[10]; int i, j; int flag = 0; int m; // // TODO: Add extra validation here m_waveioobj->wavinclose(); m_waveioobj->wavoutclose(); // //CDialog::OnOK(); int t; t = m_ip_ctl.getwindowtext(ip, 100); for (i=0; i<10; i++) assign_port[i] = '\0'; i = 0; while(ip[i]!= ':' && i < 100) i += 1; if (i == 100) flag = 1; newport = 9000; if (flag == 0)

10 m = i; j = 0; i += 1; while(ip[i]!= '\0') assign_port[j] = IP[i]; i += 1; j += 1; newport = atoi(assign_port); for(i=m; i<100; i++) IP[i] = '\0'; //int mediatype=m_sdpobj.sdpgetaudiotype(); //int format=checkmediasupport(mediatype); //UA_WAV_PCMU = 0x0001, //UA_WAV_PCMA = 0x0010, //UA_WAV_GSM = 0x0100 //typedef enum //WAV_PCMU = 0x0, //WAV_PCMA = 0x8, //WAV_GSM = 0x3 // WAV_FORMATE; WAV_FORMATE wavetype= WAV_PCMU; m_waveioobj->stopplaying(); m_waveioobj->stoprecording(); if(m_waveioobj->iswavinopen) m_waveioobj->wavinclose(); if(m_waveioobj->iswavoutopen) m_waveioobj->wavoutclose(); if( TRUE == m_flag ) m_flag = FALSE; m_ok.setwindowtext(" 掛斷 "); // //RTPPeerConnect add here, assign target ip and port here. RTPPeerConnect(IP, newport);

11 // adtbufferclear(m_bufrtp2io); adtbufferclear(m_bufio2rtp); if(m_waveioobj->wavinopen(wavetype,8,8000,1,30)!=0) m_ip_ctl.setwindowtext("open WaveIO Error!"); else if ( m_waveioobj->startrecording()!=0 ) m_ip_ctl.setwindowtext("record Error!"); if(m_waveioobj->wavoutopen(wavetype,8,8000,1,30)!=0) m_ip_ctl.setwindowtext("open WaveOut Error!"); else if ( m_waveioobj->startplaying()!=0 ) m_ip_ctl.setwindowtext("playing Error!"); else m_flag = TRUE; m_ok.setwindowtext(" 連線 "); int CSimRTPDlg::RTPEventHandler(int channel,const char* buffer,int buflen) return adtbufferwrite(csimrtpdlg->m_bufrtp2io,((char *) buffer),buflen); int CSimRTPDlg::Wav2RTP(char* buff, int len) char buffer[1024]; int xlen=0; memcpy(buffer,buff,len); xlen = cclrtpwrite(csimrtpdlg->m_rtpchan,buffer,len); return (xlen>=len)?len:xlen; int CSimRTPDlg::RTP2Wav(char* buff, int len) return adtbufferread(csimrtpdlg->m_bufrtp2io,buff,len);

12 int CSimRTPDlg::MediaConnection() return 0; int CSimRTPDlg::MediaPlayTone() return 0; int CSimRTPDlg::Media_RTP_Stop() m_waveioobj->stopplaying(); m_waveioobj->stoprecording(); adtbufferclear(m_bufrtp2io); adtbufferclear(m_bufio2rtp); if(m_waveioobj->iswavinopen) m_waveioobj->wavinclose(); if(m_waveioobj->iswavoutopen) m_waveioobj->wavoutclose(); cclrtpclose(m_rtpchan); adtbufferclear(m_bufrtp2io); adtbufferclear(m_bufio2rtp); return 0; int CSimRTPDlg::RTPOpenPort() int result=0; result=cclrtpopen(m_rtpchan, 240, newport); /*240 = packet size */ return result;

13 int CSimRTPDlg::RTPPeerConnect(CString ip,int port) CString buf; buf.format("[rtp] Open Peer RTP: IP(%s),Port(%d)\n",ip,port); RTPOpenPort(); cclrtpsetpeeraddr(m_rtpchan,(lpstr)(lpcstr)ip,port); buf.format("[rtp] Get had open RTP listen Port (%d)\n",cclrtpgetport(m_rtpchan)); cclrtpseteventhandler(rtpeventhandler); /*set event handler */ return 0; RTP 封包 :

14 RTCP 封包 : 查看程式碼 (rtcp.c) 的內容與 Ethereal 實際擷取的結果, 此程式似乎並無傳送 RTCP 封包, 所以只有附上 RTCP 的規格圖如下

Додаток А Текст програми CorrelationCode

74 Додаток А Текст програми CorrelationCode #include "stdafx.h" #include "C2.h" #include "C2Dlg.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = FILE ; #endif /////////////////////////////////////////////////////////////////////////////