作者：
CSDN? VC/MFC 網(wǎng)絡(luò)編程
PiggyXP ?^_^
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? 目錄：
二。發(fā)送數(shù)據(jù)包的編程實(shí)現(xiàn)
?? 1.? 填充數(shù)據(jù)包
?? 2.? 發(fā)送數(shù)據(jù)包
三。一些附加步驟及說(shuō)明
?? 1.? 如果在VC中使用winpcap
?? 2.? 獲得網(wǎng)卡信息列表
?? 3.? 獲得系統(tǒng)ARP信息列表
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?????????................緊接上
文................
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1.???????
填充數(shù)據(jù)包
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下面我舉個(gè)填充包頭的例子，我首先定義個(gè)了一個(gè)轉(zhuǎn)換字符的函數(shù)，如下
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/****************************************************************************
?*?? Name & Params::
?*???????????? formatStrToMAC
?*???????????? (
?*???????????????? const LPSTR lpHWAddrStr : 用戶輸入的MAC地址字符串
?*???????????????? unsigned char *HWAddr :?? 返回的MAC地址字符串(賦給數(shù)據(jù)包結(jié)構(gòu)體)
?*???????????? )
?*?? Purpose:
?*???????????? 將用戶輸入的MAC地址字符轉(zhuǎn)成數(shù)據(jù)包結(jié)構(gòu)體需要的格式
?****************************************************************************/
void formatStrToMAC(const LPSTR lpHWAddrStr, unsigned char *HWAddr)
{
?????? unsigned int i, index = 0, value, temp;
????? unsigned char c;
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????? _strlwr(lpHWAddrStr);???????????????????????????????????????????????? ? // 轉(zhuǎn)換成小寫
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????? for (i = 0; i < strlen(lpHWAddrStr); i++)
???? {
?????????? c = *(lpHWAddrStr + i);
????????? ? if (( c>='0' && c<='9' ) || ( c>='a' && c<='f' ))
?????????? {
??????????? ?? if (c>='0' && c<='9')? temp = c - '0';??????????????????????? ?// 數(shù)字
???????????? ? if (c>='a' && c<='f')? temp = c - 'a' + 0xa;????????????? ?// 字母
????????????? ?if ( (index % 2) == 1 )
????????????? {
?????????????????? value = value*0x10 + temp;
?????????????????? HWAddr[index/2] = value;
????????????? }
????????????? else value = temp;
????????????? index++;
???????? }
???????????? ? if (index == 12) break;
???? ?? }
}
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// 開(kāi)始填充各個(gè)字段
ARPPACKET ARPPacket;?????????????????????? ???????????????????????? ??// 定義ARPPACKET結(jié)構(gòu)體變量
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??? memset(&ARPPacket, 0, sizeof(ARPPACKET));??????????? ??????????// 數(shù)據(jù)包初始化
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???? formatStrToMAC(“DLC源MAC字符串”,ARPPacket.dlcHeader.SrcMAC);?????? // DLC幀頭
???? formatStrToMAC(“DLC目的MAC字符串”,ARPPacket.dlcHeader.DesMAC);
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???? formatStrToMAC(“ARP源MAC字符串”,ARPPacket.arpFrame.Send_HW_Addr);? // 源MAC
???? ARPPacket.arpFrame.Send_Prot_Addr = inet_addr(srcIP);???????????? ?// 源IP
???? formatStrToMAC(“ARP目的MAC字符串”,ARPPacket.arpFrame.Targ_HW_Addr); // 目的MAC
???? ARPPacket.arpFrame.Targ_Prot_Addr = inet_addr(desIP);???????????? ??// 目的IP
????
???? ARPPacket.arpFrame.Opcode = htons((unsigned short)arpType);??????? // arp包類型
????
???? // 自動(dòng)填充的常量
???? ARPPacket.dlcHeader.Ethertype = htons((unsigned short)0x0806); // DLC Header的以太網(wǎng)類型
???? ARPPacket.arpFrame.HW_Type = htons((unsigned short)1);???????????// 硬件類型
???? ARPPacket.arpFrame.Prot_Type = htons((unsigned short)0x0800);??? // 上層協(xié)議類型
???? ARPPacket.arpFrame.HW_Addr_Len = (unsigned char)6;???????????????? // MAC地址長(zhǎng)度
???? ARPPacket.arpFrame.Prot_Addr_Len = (unsigned char)4;?????????????? // IP地址長(zhǎng)度
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That’s all ! ^_^
填充完畢之后，我們需要做的就是把我們的ARPPACKET結(jié)構(gòu)體發(fā)送出去
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2.發(fā)送ARP數(shù)據(jù)包：
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我們發(fā)送ARP包就要用到winpcap的api了，具體步驟及函數(shù)是這樣的，為了簡(jiǎn)單易懂，我把錯(cuò)誤處理的地方都去掉了，詳見(jiàn)代碼
/**********************************************************************
*??? Name & Params::
*???????????? SendARPPacket()
*??? Purpose:
*???????????? 發(fā)送ARP數(shù)據(jù)包
*??? Remarks:
*???????????? 用的是winpcap的api函數(shù)
***********************************************************************/
void SendARPPacket()
{
???? char *AdapterDeviceName =GetCurAdapterName(); ????// 首先獲得獲得網(wǎng)卡名字
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???? lpAdapter = PacketOpenAdapter(AdapterDeviceName);???? // 根據(jù)網(wǎng)卡名字打開(kāi)網(wǎng)卡
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???? lpPacket = PacketAllocatePacket();????????? ?????// 給PACKET結(jié)構(gòu)指針?lè)峙鋬?nèi)存
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???? PacketInitPacket(lpPacket, &ARPPacket, sizeof(ARPPacket));?//初始化PACKET結(jié)構(gòu)指針
?????????????????????? ??????????????????????// 其中的ARPPacket就是我們先前填充的ARP包
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???? PacketSetNumWrites(lpAdapter, 1);????? ?????????// 每次只發(fā)送一個(gè)包
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???? PacketSendPacket(lpAdapter, lpPacket, true)????? ?// Send !!!!! ^_^
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???? PacketFreePacket(lpPacket);???????????????????? // 釋放資源
???? PacketCloseAdapter(lpAdapter);
}
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呵呵，至此，關(guān)于ARP包最關(guān)鍵的部分就講完了，你現(xiàn)在就可以來(lái)隨心所欲的發(fā)送自己的ARP包了
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既然作為一篇“科普文章”，接下來(lái)我再講一講與整個(gè)項(xiàng)目有關(guān)的附加步驟以及說(shuō)明
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三．附加步驟以及說(shuō)明
1. 如何在VC中使用winpcap驅(qū)動(dòng)
?????? 雖然winpcap開(kāi)發(fā)包使用起來(lái)非常簡(jiǎn)便，但是前期準(zhǔn)備工作還是要費(fèi)一番功夫的，缺一不可。^_^
?????? 首先就是要安裝它的驅(qū)動(dòng)程序了，可以到它的主頁(yè)下載，更新很快的
???? 下載WinPcap auto-installer (driver +DLLs)，直接安裝就好了，或者我提供的代碼包里面也有。
???? 希望以后用winpcap作開(kāi)發(fā)的朋友，還需要下載 Developer's pack，解壓即可。
????
??????? 然后，需要設(shè)置我們工程的附加包含目錄為我們下載Developer's pack開(kāi)發(fā)包的Inclulde目錄，連接器的附加依賴庫(kù)設(shè)置為Developer's pack的lib目錄。
?????? 當(dāng)然，因?yàn)槲覀兊墓ぷ鞅容^簡(jiǎn)單，就是借用winpcap發(fā)送數(shù)據(jù)包而已，所以只用從
winpcap開(kāi)發(fā)包的include文件夾中，拷貝Packet32.h，到我們的工程來(lái)，并且包含它就可
以，
但是要注意，Packet32.h本身還要包含一個(gè)Devioctl.h，也要一并拷貝進(jìn)來(lái)，當(dāng)然還有運(yùn)
行庫(kù)Packet.lib，一共就是需要拷貝3個(gè)文件了，如果加入庫(kù)不用我多說(shuō)了吧，在工程里面設(shè)
置，或者是在需要它的地方加入#pragma comment(lib, "Packet.lib")了。
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??????? 整個(gè)項(xiàng)目其實(shí)可以分為四個(gè)部分，填充數(shù)據(jù)包、發(fā)送數(shù)據(jù)包、枚舉系統(tǒng)網(wǎng)卡列表和
相關(guān)信息以及枚舉系統(tǒng)ARP緩存列表，下面我再講一下如何獲得系統(tǒng)的網(wǎng)卡以及ARP列
表，這兩個(gè)部分都要用到IP Helper的api，所以要包含<Iphlpapi.h>以及庫(kù)文件Iphlpapi.lib，
其實(shí)都是很簡(jiǎn)單的，只用寥寥幾行就OK了
2.???? 枚舉系統(tǒng)網(wǎng)卡以及信息
最好是先定義關(guān)于網(wǎng)卡信息的一個(gè)結(jié)構(gòu)體，這樣顯得結(jié)構(gòu)比較清晰
// 網(wǎng)卡信息
typedef struct tagAdapterInfo?????????
{
???? ???????? char szDeviceName[128];?????????? // 名字
???? ???????? char szIPAddrStr[16];???????????? // IP
???? ???????? char szHWAddrStr[18];???????????? // MAC
???? ???????? DWORD dwIndex;??????????????????? // 編號(hào)?????????
}INFO_ADAPTER, *PINFO_ADAPTER;
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/*********************************************************************
*??? Name & Params::
*???????????? AddAdapInfoToList
*???????????? (
*????????????????? CListCtrl& list :? CARPPlayerDlg傳入的list句柄
*???????????? )
*??? Purpose:
*???????????? 獲得系統(tǒng)的網(wǎng)卡信息，并將其添加到list控件中
*??? Remarks:
*???????????? 獲得網(wǎng)卡IP及MAC用到了IpHelper api GetAdaptersInfo
******************************************************************/
void AddAdapInfoToList(CListCtrl& list)
{
???? char tempChar;
???? ULONG uListSize=1;
???? PIP_ADAPTER_INFO pAdapter;?????????? // 定義PIP_ADAPTER_INFO結(jié)構(gòu)存儲(chǔ)網(wǎng)卡信息
???? int nAdapterIndex = 0;
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???? DWORD dwRet = GetAdaptersInfo((PIP_ADAPTER_INFO)&tempChar, &uListSize);//關(guān)鍵函數(shù)
?
???? if (dwRet == ERROR_BUFFER_OVERFLOW)
???? {
? PIP_ADAPTER_INFO pAdapterListBuffer = (PIP_ADAPTER_INFO)new(char[uListSize]);
? dwRet = GetAdaptersInfo(pAdapterListBuffer, &uListSize);
? if (dwRet == ERROR_SUCCESS)
? {
???? pAdapter = pAdapterListBuffer;
???? while (pAdapter)????????????????????????????????????????? ??? // 枚舉網(wǎng)卡然后將相關(guān)條目添加到List中
???? {
??????? // 網(wǎng)卡名字
????????? CString strTemp = pAdapter->AdapterName;????????????????????
????????? strTemp = "\\Device\\NPF_" + strTemp;?????????????????????? ?// 加上前綴
????????? list.InsertItem(nAdapterIndex,strTemp);?????????????????
????????? strcpy(AdapterList[nAdapterIndex].szDeviceName,strTemp);
????????? // IP
????????? strcpy(AdapterList[nAdapterIndex].szIPAddrStr,
???????????????????????????????????????????????? pAdapter->IpAddressList.IpAddress.String );
????????? list.SetItemText(nAdapterIndex,1,AdapterList[nAdapterIndex].szIPAddrStr);
????????? // MAC
????????? formatMACToStr( AdapterList[nAdapterIndex].szHWAddrStr, pAdapter->Address );
????????? list.SetItemText(nAdapterIndex,2,AdapterLis[nAdapterIndex].szHWAddrStr);
????????? // 網(wǎng)卡編號(hào)
????????? AdapterList[nAdapterIndex].dwIndex = pAdapter->Index;?????????
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????????? pAdapter = pAdapter->Next;
????????? nAdapterIndex ++;
????????? }
???? delete pAdapterListBuffer;
???? }
}
}
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2)獲取ARP條目列表
// ARP條目信息
typedef struct tagARPInfo????????????
{
???? char szIPAddrStr[16];??????????? ? // IP
???? char szHWAddrStr[18];???????????? // MAC
???? DWORD dwType;???????????????????? // 類型
}INFO_ARP, *PINFO_ARP;
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/**********************************************************************
*??? Name & Params::
*???????????? AddARPInfoToList
*???????????? (
*????????????????? CListCtrl& list :?????????? ? CARPPlayerDlg傳入的list句柄
*????????????????? const short nAdapterIndex :?? 用戶選中的網(wǎng)卡編號(hào)
*???????????? )
*??? Purpose:
*???????????? 讀入系統(tǒng)的ARP緩存列表,.并添加到對(duì)話框中
*??? Remarks:
*???????????? 用到了IpHelper api GetIpNetTable
*???????????? 而且用到了WinSock的api，所以要包含<WinSock2.h>
*****************************************************************/
void AddARPInfoToList(CListCtrl& list,const short nAdapterIndex)
{
???? char tempChar;
???? DWORD dwListSize = 1;
???? DWORD dwRet;
???? in_addr inaddr;
???? list.DeleteAllItems();
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???? dwRet = GetIpNetTable((PMIB_IPNETTABLE)&tempChar, &dwListSize, TRUE);? // 關(guān)鍵函數(shù)
???? if (dwRet == ERROR_INSUFFICIENT_BUFFER)
???? {
???????? PMIB_IPNETTABLE pIpNetTable = (PMIB_IPNETTABLE)new(char[dwListSize]);
???????? dwRet = GetIpNetTable(pIpNetTable, &dwListSize, TRUE);
???????? if (dwRet == ERROR_SUCCESS)
???????? {
????????????? for (int i=0; i<(int)pIpNetTable->dwNumEntries; i++)
????????????? {
????????????????? // IP
?????????????????? inaddr.S_un.S_addr = pIpNetTable->table[i].dwAddr;
?????????????????? strcpy( ARPList[i].szIPAddrStr, inet_ntoa(inaddr) );??
?????????????????? // MAC
?????????????????? formatMACToStr( ARPList[i].szHWAddrStr, pIpNetTable->table[i].bPhysAddr );
?????????????????? // Type
?????????????????? ARPList[i].dwType = pIpNetTable->table[i].dwType;????????
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?????????????????? if (AdapterList[nAdapterIndex].dwIndex != pIpNetTable->table[i].dwIndex)???????????????????? ????????????????????????????????? continue;
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?????????????????? list.InsertItem(i,ARPList[i].szIPAddrStr);
?????????????????? list.SetItemText(i,1,ARPList[i].szHWAddrStr);
?????????????????? switch(ARPList[i].dwType) {?????????? // 根據(jù)type的值來(lái)轉(zhuǎn)換成字符顯示
?????????????????? case 3:
?????????????????????? list.SetItemText(i,2,"Dynamic");
?????????????????????? break;
?????????????????? case 4:
?????????????????????? list.SetItemText(i,2,"Static");
?????????????????????? break;
?????????????????? case 1:
?????????????????????? list.SetItemText(i,2,"Invalid");
?????????????????? default:
?????????????????????? list.SetItemText(i,2,"Other");
?????????????????? }
????????????? }
???????? }
???????? delete pIpNetTable;
???? }
}
??????? 這樣一來(lái)，我們基本上大功告成了，其他還有一些東西在這里就不講了，大家可以下載我的代碼看看就好了。
??????? 下面我們來(lái)用ARP包玩一些小把戲 ^_^。