网络编程--IP帮助函数

来源：互联网发布：html5做的软件编辑：程序博客网时间：2024/06/04 22:21

一.GetNetworkParams获取本地电脑的网络参数

获取一个FIXED_INFO的结构体

typedef struct {    char HostName[MAX_HOSTNAME_LEN + 4] ;    char DomainName[MAX_DOMAIN_NAME_LEN + 4];    PIP_ADDR_STRING CurrentDnsServer;    IP_ADDR_STRING DnsServerList;    UINT NodeType;    char ScopeId[MAX_SCOPE_ID_LEN + 4];    UINT EnableRouting;    UINT EnableProxy;    UINT EnableDns;} FIXED_INFO_W2KSP1, *PFIXED_INFO_W2KSP1;#if (NTDDI_VERSION >= NTDDI_WIN2KSP1)typedef  FIXED_INFO_W2KSP1 FIXED_INFO;typedef  FIXED_INFO_W2KSP1 *PFIXED_INFO;#endif

二.网络接口管理

1.GetNumberOfInterfaces获取接口数量

DWORD GetNumberOfInterfaces(
__out PDWORD pdwNumIf
);

2.GetAdaptersInfo返回本地网络适配器列表

DWORD GetAdaptersInfo(
__out PIP_ADAPTER_INFO pAdapterInfo,
__inout PULONG pOutBufLen
);

int main(){    PIP_INTERFACE_INFO pInfo =             (PIP_INTERFACE_INFO)::GlobalAlloc(GPTR, sizeof(IP_INTERFACE_INFO));    ULONG ulOutBufLen = sizeof(IP_INTERFACE_INFO);    // 如果上面申请的内存不够的话，再重新申请    if(::GetInterfaceInfo(pInfo, &ulOutBufLen) == ERROR_INSUFFICIENT_BUFFER)    {        ::GlobalFree(pInfo);        pInfo = (PIP_INTERFACE_INFO)::GlobalAlloc(GPTR, ulOutBufLen);    }    // 再次调用GetInterfaceInfo来获取我们实际需要的数据    if(::GetInterfaceInfo(pInfo, &ulOutBufLen) == NO_ERROR)    {        printf(" \tAdapter Name: %ws\n", pInfo->Adapter[0].Name);        printf(" \tAdapter Index: %ld\n", pInfo->Adapter[0].Index);        printf(" \tNum Adapters: %ld\n", pInfo->NumAdapters);    }    else    {        printf(" GetInterfaceInfo() failed \n");    }    ::GlobalFree(pInfo);    return 0;}

三.IP地址管理

获取IP地址列表、添加和删除IP地址
GetIpAddrTable、AddIPAddress、DeleteIPAddress

int main(){        // 首先调用GetIpAddrTable函数获取一个适配器    PMIB_IPADDRTABLE pIPAddrTable;    DWORD dwSize = 0;    pIPAddrTable = (PMIB_IPADDRTABLE)::GlobalAlloc(GPTR, sizeof(MIB_IPADDRTABLE));    // 获取所需的内存    if(::GetIpAddrTable(pIPAddrTable, &dwSize, FALSE) == ERROR_INSUFFICIENT_BUFFER)    {        ::GlobalFree(pIPAddrTable);        pIPAddrTable = (PMIB_IPADDRTABLE)::GlobalAlloc(GPTR, dwSize);    }    // 再次调用GetIpAddrTable获取实际我们想要的数据    if(::GetIpAddrTable(pIPAddrTable, &dwSize, FALSE) == NO_ERROR)    {        // 打印出适配器信息        printf(" Address: %ld\n", pIPAddrTable->table[0].dwAddr);        printf(" Mask:    %ld\n", pIPAddrTable->table[0].dwMask);        printf(" Index:   %ld\n", pIPAddrTable->table[0].dwIndex);        printf(" BCast:   %ld\n", pIPAddrTable->table[0].dwBCastAddr);        printf(" Reasm:   %ld\n", pIPAddrTable->table[0].dwReasmSize);    }        else    {        printf(" GetIpAddrTable() failed \n");    }        ::GlobalFree(pIPAddrTable);        // 我们将要添加的IP和mast    UINT iaIPAddress;    UINT imIPMask;        iaIPAddress = inet_addr("192.168.0.27");    imIPMask = inet_addr("255.255.255.0");        // 返回的句柄    ULONG NTEContext = 0;    ULONG NTEInstance = 0;        // 向第一个适配器添加IP地址    DWORD dwRet;    dwRet = ::AddIPAddress(iaIPAddress, imIPMask,                 pIPAddrTable->table[0].dwIndex, &NTEContext, &NTEInstance);    if(dwRet == NO_ERROR)     {        printf(" IP address added.\n");    }    else     {        printf(" AddIPAddress failed. \n");        LPVOID lpMsgBuf;        // 调用失败，打印出为什么失败        if (::FormatMessage(             FORMAT_MESSAGE_ALLOCATE_BUFFER |             FORMAT_MESSAGE_FROM_SYSTEM |             FORMAT_MESSAGE_IGNORE_INSERTS,            NULL,            dwRet,            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language            (LPTSTR) &lpMsgBuf,            0,            NULL ))         {            printf(" Error: %s ", lpMsgBuf);        }        ::LocalFree(lpMsgBuf);    }        // 删除上面在第一个适配器上添加的IP地址    dwRet = ::DeleteIPAddress(NTEContext);    if(dwRet == NO_ERROR)     {        printf(" IP Address Deleted.\n");    }    else     {                printf(" DeleteIPAddress failed.\n");    }        return 0;}

四.获取网络状态信息

1.获取TCP和UDP连接表(GetTcpTable,GetUdpTable)

PMIB_UDPTABLE MyGetUdpTable(BOOL bOrder){    PMIB_UDPTABLE pUdpTable = NULL;    DWORD dwActualSize = 0;    // 查询所需缓冲区的大小    if(::GetUdpTable(pUdpTable, &dwActualSize, bOrder) == ERROR_INSUFFICIENT_BUFFER)    {        // 为MIB_UDPTABLE结构申请内存        pUdpTable = (PMIB_UDPTABLE)::GlobalAlloc(GPTR, dwActualSize);        // 获取UDP监听表        if(::GetUdpTable(pUdpTable, &dwActualSize, bOrder) == NO_ERROR)            return pUdpTable;        ::GlobalFree(pUdpTable);    }    return NULL;}void MyFreeUdpTable(PMIB_UDPTABLE pUdpTable){    if(pUdpTable != NULL)        ::GlobalFree(pUdpTable);}

// 打印UDP监听表信息PMIB_UDPTABLE pUdpTable = MyGetUdpTable(TRUE);if(pUdpTable != NULL){    struct in_addr inadLocal;    printf("UDP TABLE\n");    printf("%20s %10s\n", "Loc Addr", "Loc Port");    for (UINT i = 0; i < pUdpTable->dwNumEntries; ++i)    {        inadLocal.s_addr = pUdpTable->table[i].dwLocalAddr;        // 打印出此入口的信息        printf("%20s %10u \n",             inet_ntoa(inadLocal), ntohs((unsigned short)(0x0000FFFF & pUdpTable->table[i].dwLocalPort)));    }    MyFreeUdpTable(pUdpTable);}

五.获取相关统计数据

相关的函数GetxxxStatistics(GetIpStatistics,GetIcmpStatistics,GetTcpStatistics,GetUdpStatistics)

// 获取UDP统计数据MIB_UDPSTATS UdpStats;if(::GetUdpStatistics(&UdpStats) == NO_ERROR){    MIB_UDPSTATS *pStats = &UdpStats;    printf("\nUDP Statistics\n");    printf("\              dwInDatagrams      = %lu\n\              dwNoPorts          = %lu\n\              dwInErrors         = %lu\n\              dwOutDatagrams     = %lu\n\              dwNumAddrs         = %lu\n",              pStats->dwInDatagrams,              pStats->dwNoPorts,              pStats->dwInErrors,              pStats->dwOutDatagrams,              pStats->dwNumAddrs);}

六.路由表管理

1.GetIpForwardTable获取路由表

PMIB_IPFORWARDTABLE MyGetIpForwardTable(BOOL bOrder){    PMIB_IPFORWARDTABLE pIpRouteTab = NULL;    DWORD dwActualSize = 0;        // 查询所需缓冲区的大小    if(::GetIpForwardTable(pIpRouteTab, &dwActualSize, bOrder) == ERROR_INSUFFICIENT_BUFFER)    {        // 为MIB_IPFORWARDTABLE结构申请内存        pIpRouteTab = (PMIB_IPFORWARDTABLE)::GlobalAlloc(GPTR, dwActualSize);        // 获取路由表        if(::GetIpForwardTable(pIpRouteTab, &dwActualSize, bOrder) == NO_ERROR)            return pIpRouteTab;        ::GlobalFree(pIpRouteTab);    }    return NULL;}

void PrintIpForwardTable(){    PMIB_IPFORWARDTABLE pIpRouteTable = MyGetIpForwardTable(TRUE);    if(pIpRouteTable != NULL)    {        DWORD i, dwCurrIndex;        struct in_addr inadDest;        struct in_addr inadMask;        struct in_addr inadGateway;          PMIB_IPADDRTABLE pIpAddrTable = NULL;                char szDestIp[128];        char szMaskIp[128];        char szGatewayIp[128];        printf("Active Routes:\n\n");                printf("  Network Address          Netmask  Gateway Address        Interface  Metric\n");        for (i = 0; i < pIpRouteTable->dwNumEntries; i++)        {            dwCurrIndex = pIpRouteTable->table[i].dwForwardIfIndex;                // 目的地址            inadDest.s_addr = pIpRouteTable->table[i].dwForwardDest;            // 子网掩码            inadMask.s_addr = pIpRouteTable->table[i].dwForwardMask;            // 网关地址            inadGateway.s_addr = pIpRouteTable->table[i].dwForwardNextHop;                        strcpy(szDestIp, inet_ntoa(inadDest));            strcpy(szMaskIp, inet_ntoa(inadMask));            strcpy(szGatewayIp, inet_ntoa(inadGateway));            printf("  %15s %16s %16s %16d %7d\n",                 szDestIp,                 szMaskIp,                 szGatewayIp,                 pIpRouteTable->table[i].dwForwardIfIndex,    // 可以在此调用GetIpAddrTable获取索引对应的IP地址                pIpRouteTable->table[i].dwForwardMetric1);        }        MyFreeIpForwardTable(pIpRouteTable);    }}

2.添加、删除、修改路由

CreateIpForwardEntry、DeleteIpForwardEntry、SetIpForwardEntry

七.ARP表管理

1.获取IP地址到适配器的映射关系，即ARP表(GetIpNetTable)

BOOL InterfaceIdxToInterfaceIp(PMIB_IPADDRTABLE pIpAddrTable, DWORD dwIndex, char str[]){    char* szIpAddr;    if(pIpAddrTable == NULL ||  str == NULL)        return FALSE;    str[0] = '\0';    // 遍历IP地址表，查找索引dwIndex对应的IP地址    for(DWORD dwIdx = 0; dwIdx < pIpAddrTable->dwNumEntries; dwIdx++)    {        if(dwIndex == pIpAddrTable->table[dwIdx].dwIndex)        {            // 以字符串的形式返回查询结果            szIpAddr = inet_ntoa(*((in_addr*)&pIpAddrTable->table[dwIdx].dwAddr));            if(szIpAddr)            {                strcpy(str, szIpAddr);                return TRUE;            }            else                return FALSE;        }    }    return FALSE;}

0 0