ip地址的合法性及子網(wǎng)判斷

實(shí)驗(yàn)九:IP地址的合法性及子網(wǎng)判斷#include<iostream.h>#include<string.h>#include<stdlib.h>#include<ctype.h>//類結(jié)構(gòu)classipTest{charip[15];//定義ip數(shù)組，存放ip地址charsubnetPlusMask[18];//定義subnetPlusMask數(shù)組，存放子網(wǎng)號(hào)和子網(wǎng)掩碼中1的個(gè)數(shù)charsubnet[18];//定義subnet數(shù)組，存放子網(wǎng)號(hào)charTempIp[15];//定義TempIp數(shù)組，存放臨時(shí)的ip地址charTempSub[18];//定義TempSub數(shù)組，存放臨時(shí)的子網(wǎng)號(hào)intmask;//定義整型mask，存放子網(wǎng)掩碼中1的個(gè)數(shù)boolmaskIsValid;//定義布爾值maskIsValid，存放判斷mask真值的變量public:ipTest(char*,char*);//定義ipTest函數(shù)ipTest(){};boolNoIllegalChar(char*);//非法字符的判斷boolipIsValid(char*);//判斷IP地址是否合法boolsubnetIsValid(char*);//判斷子網(wǎng)號(hào)是否合法voidbelong();//判斷IP是否為子網(wǎng)成員print();//定義輸出函數(shù)print};//主函數(shù)voidmain(intargc,char*argv[]){if(argc!=3){//判斷參數(shù)格式是否正確cout<<"Pleaseinputcommand:ip_testsubnet/maskip";return;}else{if(strlen(argv[1])>18){//先判斷最簡單的錯(cuò)誤，子網(wǎng)號(hào)及子網(wǎng)掩碼長度和是否超出cout<<"subnet/maskistoolong";return;}if(strlen(argv[2])>15){//ip地址長度是否超出cout<<"ipAddressistoolong";return;}ipTesttest(argv[1],argv[2]);//實(shí)例化ipTest類test.print();//完成相應(yīng)判別并輸出結(jié)果}}//構(gòu)造函數(shù)ipTest::ipTest(char*subnetPlusMask,char*ip){maskIsValid=true;chartemp[2];//把'/'前的字符復(fù)制到subnet字符數(shù)組中intsmLen=strlen(subnetPlusMask);//定義smLen為subnetPlusMask的長度for(inti=0;i<smLen&&subnetPlusMask[i]!='/';i++){this->subnet[i]=subnetPlusMask[i];//對(duì)subnet數(shù)組賦值，值為subnetPlusMask中的數(shù)值this->TempSub[i]=subnetPlusMask[i];//對(duì)TempSub數(shù)組賦值，值為subnetPlusMask中的數(shù)值}subnet[i]='\0';//給數(shù)組加上結(jié)束符TempSub[i]='\0';//給數(shù)組加上結(jié)束符if(i>=smLen-2){//初始化mask和maskIsValidif(i==smLen-2){temp[0]=subnetPlusMask[i+1];if(!isdigit(temp[0]))//判斷temp中的值是否為字符maskIsValid=false;}else{if(i==smLen-3){//判斷IP是否為子網(wǎng)成員，判斷子網(wǎng)號(hào)與掩碼是否匹配，以及子網(wǎng)號(hào)、主機(jī)號(hào)全0全1問題voidipTest::belong(){intsubLen=strlen(subnet);intipLen=strlen(ip);unsignedintiIPA,iSubA,iMask;unsignedcharsubA[4],ipA[4];chartemp[3];inti,j,t=0;for(i=0,j=0;i<subLen;i++){//不用檢錯(cuò)if(subnet[i]!='.')temp[j++]=subnet[i];//temp數(shù)組中放'.'間的串else{subA[3-t]=atoi(temp);//subA數(shù)組中放'.'間的數(shù)據(jù)j=0;t++;temp[0]=temp[1]=temp[2]='\0';}}subA[0]=atoi(temp);temp[0]=temp[1]=temp[2]='\0';iSubA=*(unsignedint*)subA;//iSubA中放subnet中'.'除外的串對(duì)應(yīng)的數(shù)for(i=0,j=0,t=0;i<ipLen;i++){//不用再檢錯(cuò)if(ip[i]!='.')temp[j++]=ip[i];else{ipA[3-t]=atoi(temp);j=0;t++;temp[0]=temp[1]=temp[2]='\0';}}ipA[0]=atoi(temp);iIPA=*(unsignedint*)ipA;//iIPA中放IP中'.'除外的串對(duì)應(yīng)的數(shù)//獲得掩碼iMask=0xffffffff;iMask<<=(32-mask);if((iSubA|iMask)!=iMask){//說明sub與mask不匹配cout<<"subnetandmasknotmatch!";return;}if((iSubA^iMask)==0){//說明子網(wǎng)號(hào)全1cout<<"subnetisall1!";return;}if((iSubA&iMask)==0){//說明子網(wǎng)號(hào)全0cout<<"subnetisall0!";return;}if((iSubA)==(iIPA&iMask)){//IP和掩碼與，結(jié)果和子網(wǎng)號(hào)比較if((iIPA|iMask)==iMask){//說明主機(jī)號(hào)全0cout<<"Ipaddressisall0!";return;}if((iIPA|iMask)==0xffffffff){//說明主機(jī)號(hào)全1cout<<"Ipaddressisall1!";return;}//ip屬于subn