发送ARP

#include<iostream>#include"pcap.h"#pragma comment(lib,"wpcap.lib")#pragma comment(lib,"ws2_32.lib")using namespace std;//物理帧头结构typedef struct PhyFrame{unsigned char DstMAC[6];unsigned char SrcMAC[6];unsigned short FrameType;}PHYFRAME;//ARP帧结构typedef struct ArpFrame{unsigned short HardwareType;unsigned short ProtocolType;unsigned char MACLen;unsigned char IPLen;unsigned short Flag;unsigned char SrcMAC[6];unsigned char SrcIP[4];unsigned char DstMAC[6];unsigned char DstIP[4];unsigned char Padding[18];}ARPFRAME;//ARP包=物理帧头+ARP帧typedef struct ArpPacket{PHYFRAME phyFrame;ARPFRAME arpFrame;}*ARPPACKET;ArpPacket arpPacket;int CheckMAC(char *argv,unsigned char *mac_addr){char mac[18];int i=0,j=0,k=0;strcpy(mac,argv);int m=strlen(argv);//判断mac地址是否正确for(i=0;i<m;i++){if(mac[i]<'-'||(mac[i]>'-'&&mac[i]<'0')||(mac[i]>'9'&&mac[i]<'A')||(mac[i]>'Z'&&mac[i]<'a')||mac[i]>'z'){cout<<"MAC address error"<<endl;return 0;}else{if(mac[i]!='-')j++;else{k++;if(j>2){cout<<"MAC address error!"<<endl;return 0;}elsej=0;if(k>5){cout<<"MAC address error!"<<endl;return 0;}}}}//填充MAC地址for(i=0;i<6;i++){while(*(mac+j)=='-')j++;if(*(mac+j)>='0'&&*(mac+j)<='9')mac_addr[i]=(unsigned char)(*(mac+j)-'0');if(*(mac+j)>='a'&&*(mac+j)<='z')mac_addr[i]=(unsigned char)(*(mac+j)-'a'+10);if(*(mac+j)>='A'&&*(mac+j)<='Z')mac_addr[i]=(unsigned char)(*(mac+j)-'A'+10);j++;mac_addr[i]*=16;if(*(mac+j)>='0'&&*(mac+j)<='9')mac_addr[i]+=(unsigned char)(*(mac+j)-'0');if(*(mac+j)>='a'&&*(mac+j)<='z')mac_addr[i]+=(unsigned char)(*(mac+j)-'a'+10);if(*(mac+j)>='A'&&*(mac+j)<='Z')mac_addr[i]+=(unsigned char)(*(mac+j)-'A'+10);}return 1;}int CheckIP(char *argv,unsigned char *ip_addr){char ip[16];int i=0,j=0,k=0;strcpy(ip,argv);int m=strlen(argv);//判断IP地址是否正确for(i=0;i<m;i++){if(ip[i]<'.'||ip[i]>'.'&&ip[i]<'0'||ip[i]>'9'){cout<<"IP address errror!"<<endl;return 0;}else{if(ip[i]!='.')j++;else{k++;if(j>3){cout<<"IP address errror!"<<endl;        return 0;}elsej=0;if(k>3){cout<<"IP address errror!"<<endl;        return 0;}}}}//填充IP地址for(i=0;i<4;i++){while(*(ip+j)=='.')j++;ip_addr[i]=(unsigned char)atoi(ip+j);}return 1;}void main(int argc,char *argv[]){if(argc!=5){cout<<"Please input command:SendArp source_ip source_mac dest_ip dest_mac"<<endl;return;}//填充物理帧头各字段int i=0;memset(&arpPacket,0,sizeof(arpPacket));if(!CheckMAC(argv[4],arpPacket.phyFrame.DstMAC))return;if(!CheckMAC(argv[2],arpPacket.phyFrame.SrcMAC))return;arpPacket.phyFrame.FrameType=htons((unsigned short)0x0608);//填充ARP帧各字段arpPacket.arpFrame.HardwareType=(unsigned short)0x0100;arpPacket.arpFrame.ProtocolType=(unsigned short)0x0008;arpPacket.arpFrame.MACLen=(unsigned char)6;arpPacket.arpFrame.IPLen=(unsigned char)4;if(!CheckMAC(argv[2],arpPacket.arpFrame.SrcMAC))return;if(!CheckIP(argv[1],arpPacket.arpFrame.SrcIP))return;if(!CheckMAC(argv[2],arpPacket.arpFrame.DstMAC))return;if(!CheckIP(argv[3],arpPacket.arpFrame.DstIP))return;for(i=0;i<18;i++)arpPacket.arpFrame.Padding[i]=0;//初始化网卡相关参数pcap_if_t *alldevs;pcap_if_t *d,*head=NULL;pcap_t *fp;char errbuf[PCAP_ERRBUF_SIZE];//获取网卡列表if(pcap_findalldevs(&alldevs,errbuf)==-1){cout<<"Unable to create adapter list!"<<endl;return;}//列出网卡数目i=0;for(d=alldevs;d;d=d->next){cout<<++i<<":"<<d->name;if(d->description)cout<<"   "<<d->description<<endl;}//没有发现网卡if(i==0){cout<<"No adapter found!"<<endl;return;}//选择要使用的网卡cout<<"Enter the interface number(1-"<<i<<"):";int k;cin>>k;if(k<1||k>i){cout<<"Out of range!"<<endl;return;}for(d=alldevs,i=1;i<k;d=d->next,i++)head=d;//以混杂模式打开网卡if((fp=pcap_open_live(head->name,1000,1,1000,errbuf))==NULL){cout<<"Unable to open the adapter!"<<endl;pcap_freealldevs(alldevs);return;}//通过网卡发送ARP包if(pcap_sendpacket(fp,(unsigned char*)&arpPacket,sizeof((unsigned char*)&arpPacket))==-1){cout<<"ARP packet send error!"<<endl;return;}cout<<"Source MAC: "<<argv[1]<<endl;cout<<"Sourve IP:  "<<argv[2]<<endl;cout<<"Dest MAC: "<<argv[3]<<endl;cout<<"Dest IP: "<<argv[4]<<endl;cout<<"ARP packet send success!"<<endl;}