计算机网络-课件e3.实验三sendudp源程序

1、 PAGE 7/ SendUDP.cpp : Defines the entry point for the application./#include stdafx.h#include resource.h#include #include #pragma comment(lib, ws2_32)#include TCPIP.h#define MAX_LOADSTRING 100int SendUdp(char *, int , char *, int);void ShowWsaErrorString(char *);void GetHostAddress(SOCKADDR_IN *);vo

2、id CreateAddrPortEditRect(HWND, char *, int);void GetAddrPortEditInt(HWND, char *, int *);void CreateTextEditRect(HWND);void SendTextEdit(HWND);void ExitTextEdit(HWND);SOCKADDR_IN addr_in, addr_out;int SrcPort = 64321;int DstPort = 61234;char DstAddr16 = 192.168.0.103;char PacketText256 = UDP;BOOL S

3、endPacketText = FALSE;/ Global Variables:：LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam):switch (message) case WM_COMMAND:wmId = LOWORD(wParam); wmEvent = HIWORD(wParam); / Parse the menu selections:switch (wmId)case IDM_SENDUDP:SendUdp(DstAddr, DstPort, PacketText,

4、strlen(PacketText);break;case IDM_SETDSTADDRPORT:EnableMenuItem(GetMenu(hWnd), IDM_SETPACKETTEXT, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);EnableMenuItem(GetMenu(hWnd), IDM_SENDUDP, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);CreateAddrPortEditRect(hWnd, DstAddr, DstPort);break; case IDM_GETDSTADDRPORT:G

5、etAddrPortEditInt(hWnd, DstAddr, &DstPort);EnableMenuItem(GetMenu(hWnd), IDM_SETPACKETTEXT, MF_BYCOMMAND | MF_ENABLED);EnableMenuItem(GetMenu(hWnd), IDM_SENDUDP, MF_BYCOMMAND | MF_ENABLED);break;case IDM_SETPACKETTEXT:EnableMenuItem(GetMenu(hWnd), IDM_SETDSTADDRPORT, MF_BYCOMMAND | MF_DISABLED | MF_

6、GRAYED);EnableMenuItem(GetMenu(hWnd), IDM_SENDUDP, MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);CreateTextEditRect(hWnd);break; case IDM_SENDPACKETTEXT:SendTextEdit(hWnd);SendUdp(DstAddr, DstPort, PacketText, strlen(PacketText);break;case IDM_EXITPACKETTEXT:ExitTextEdit(hWnd);EnableMenuItem(GetMenu(hWnd)

7、, IDM_SETDSTADDRPORT, MF_BYCOMMAND | MF_ENABLED);EnableMenuItem(GetMenu(hWnd), IDM_SENDUDP, MF_BYCOMMAND | MF_ENABLED);break;: return 0;:int InitIpHeader(char *ipBuffer, char *SrcAddr, char *DstAddr, int PayLoadLen)/ IP 头初始化 IP *ip=NULL; ip = (IP *)ipBuffer; ip-Version = (4 ServiceType = 0; ip-Total

8、Len= htons(sizeof(IP) + PayLoadLen); ip-ID= 0; ip-FragOff = 0; ip-TimeToLive= 6; ip-Protocol= 0 x11; ip-HdrChksum = 0; ip-SrcAddr= inet_addr(SrcAddr); ip-DstAddr= inet_addr(DstAddr);/ ip-HdrChksum; return sizeof(IP);int InitUdpHeader(char *Buffer, int SrcPort, int DstPort, int PayLoadLen) UDP *udp =

9、 NULL; udp = (UDP *)Buffer; udp-SrcPort = htons(SrcPort); udp-DstPort = htons(DstPort); udp-TotalLen= htons(sizeof(UDP) + PayLoadLen);/udp-Chksum return sizeof(UDP);char snString1024;int SendUdp(char *DstAddr, int DstPort, char *UdpBuffer, int UdpBufferSize) WSADATA wsaData; SOCKET SendSocket; charS

10、endBuffer65535=0;intIpHdrLen, UdpHdrLen, TotalSize;int flag; intret; TotalSize = sizeof(IP) + sizeof(UDP) + UdpBufferSize;/ 检查 Winsock 版本号，WSAData为WSADATA结构对象 if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) ShowWsaErrorString(Send WSAStartup); return -1; / 创建原始套接字SendSocket = socket(AF_INET, SOCK_RAW,

11、 IPPROTO_UDP);if (SendSocket = INVALID_SOCKET) ShowWsaErrorString(Send Socket);goto retSend; / 设置IP头， 包括optionflag = 1; if (setsockopt(SendSocket, IPPROTO_IP, IP_HDRINCL, (char *)&flag, sizeof(flag) = SOCKET_ERROR) ShowWsaErrorString(Send opt);goto retSend; GetHostAddress(&addr_in); if (bind(SendSoc

12、ket, (PSOCKADDR)&addr_in, sizeof(addr_in) = SOCKET_ERROR) ShowWsaErrorString(Send bind);goto retSend; / 初始化IP头IpHdrLen = InitIpHeader(SendBuffer, inet_ntoa(addr_in.sin_addr), DstAddr, UdpBufferSize);/ 发给指定主机/IpHdrLen = InitIpHeader(SendBuffer, inet_ntoa(addr_in.sin_addr), inet_ntoa(addr_in.sin_addr)

13、, UdpBufferSize);/ 发给本机 / 初始化UDP头 UdpHdrLen = InitUdpHeader(&SendBufferIpHdrLen, SrcPort, DstPort, UdpBufferSize); / Copy the payload to the end of the header memcpy(&SendBufferIpHdrLen + UdpHdrLen, UdpBuffer, UdpBufferSize); addr_out.sin_family = AF_INET; addr_out.sin_port = htons(DstPort); addr_ou

14、t.sin_addr.s_addr = inet_addr(DstAddr); ret = sendto(SendSocket, SendBuffer, TotalSize, 0, (const struct sockaddr*)&addr_out, sizeof(addr_out); if (ret = SOCKET_ERROR) ShowWsaErrorString(Send to);goto retSend; else wsprintf(snString, sourAddr=%s, inet_ntoa(addr_in.sin_addr);wsprintf(snString, %s, ds

15、tAddr=%s, snString, inet_ntoa(addr_out.sin_addr);wsprintf(snString, %s, sourPort=%d, dstPort=%d, sendsize=%d, snString, ntohs(addr_in.sin_port), ntohs(addr_out.sin_port), ret); if (!SendPacketText) MessageBox(NULL, snString, sent OK, MB_OK); retSend: closesocket(SendSocket) ; WSACleanup() ; return 0

16、;void ShowWsaErrorString(char *ErrorType)int i, WSAErrorID;char WSAErrorType128;WSAErrorID = WSAGetLastError();wsprintf(WSAErrorType, 错误代码：%d, WSAErrorID);for (i=0; isin_addr = *(in_addr *)pHost-h_addr_list0; /IPaddrin-sin_family = AF_INET;addrin-sin_port = htons(SrcPort);HWND hAddrEdit, hPortEdit,

17、hButton; RECT hAddrPortEditRect = 170, 100, 300, 130;void CreateAddrPortEditRect(HWND hWnd, char *SetDstAddr, int SetDstPort)char hEditString16;HDC hDC;hDC = GetDC(hWnd);TextOut(hDC, hAddrPortEditRect.left-120, hAddrPortEditRect.top+4, 目的主机IP地址：, 16);TextOut(hDC, hAddrPortEditRect.left-120, hAddrPor

18、tEditRect.top+44, 目的端口号： , 16);ReleaseDC(hWnd, hDC);hAddrEdit = CreateWindow(EDIT, NULL, WS_CHILD|WS_VISIBLE|ES_LEFT|WS_THICKFRAME, hAddrPortEditRect.left, hAddrPortEditRect.top, hAddrPortEditRect.right-hAddrPortEditRect.left, hAddrPortEditRect.bottom-hAddrPortEditRect.top, hWnd, NULL, hInst, NULL);

19、 hPortEdit = CreateWindow(EDIT, NULL, WS_CHILD|WS_VISIBLE|ES_LEFT|WS_THICKFRAME, hAddrPortEditRect.left, hAddrPortEditRect.top+40, hAddrPortEditRect.right-hAddrPortEditRect.left, hAddrPortEditRect.bottom-hAddrPortEditRect.top, hWnd, NULL, hInst, NULL); SetWindowText(hAddrEdit, SetDstAddr);itoa(SetDs

20、tPort, hEditString, 10);SetWindowText(hPortEdit, hEditString);hButton = CreateWindow(BUTTON, 确定, WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON, hAddrPortEditRect.left-50, hAddrPortEditRect.top+100, hAddrPortEditRect.right-hAddrPortEditRect.left-40, hAddrPortEditRect.bottom-hAddrPortEditRect.top, hWnd, (HMENU)ID

21、M_GETDSTADDRPORT, hInst, NULL); void GetAddrPortEditInt(HWND hWnd, char *GetDstAddr, int *GetDstPort)char hEditString16;HDC hDC; GetWindowText(hAddrEdit, hEditString, 15); if (strlen(hEditString) 4) return;strcpy(GetDstAddr, hEditString); GetWindowText(hPortEdit, hEditString, 15); if (strlen(hEditSt

22、ring) 1) return;*GetDstPort = atoi(hEditString);DestroyWindow(hAddrEdit);DestroyWindow(hPortEdit);DestroyWindow(hButton);hDC = GetDC(hWnd);TextOut(hDC, hAddrPortEditRect.left-120, hAddrPortEditRect.top+4, , 16);TextOut(hDC, hAddrPortEditRect.left-120, hAddrPortEditRect.top+44, , 16);ReleaseDC(hWnd,

23、hDC);HWND hTextEdit, hTextButton, hTextExitButton; RECT hTextEditRect = 100, 100, 1000, 130;void CreateTextEditRect(HWND hWnd)HDC hDC;hDC = GetDC(hWnd);TextOut(hDC, hTextEditRect.left, hTextEditRect.top+10, 请输入要传送的报文：, 20);ReleaseDC(hWnd, hDC);hTextEdit = CreateWindow(EDIT, NULL, WS_CHILD|WS_VISIBLE|ES_LEFT|WS_THICKFRAME, hTextEditRect.left, hTextEditRect.top+40, 1000, 30, hWnd, NULL, hInst, NULL); hTextButton = CreateWindow(BUTTON, 发送, WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON, (hTextEditRect.left+hTextEditRect.right)/2-