计算机网络课程设计(第五章)发送ARP数据包(完整程序代码)(共6页).docx
精选优质文档-倾情为你奉上计算机网络课程设计机械工业出版社第5章：发送ARP数据包课程设计目的：ARP协议用于完成IP地址与MAC 地址之间的转换。熟悉ARP协议对于IP数据包的传送过程具有重要意义。本课程设计的主要目的是通过封装与发送ARP帧，了解ARP协议的工作原理与ARP帧的结构。完整程序代码：#include<iostream.h>#include<pcap.h>#pragma comment(lib,"wpcap.lib")#pragma comment(lib,"ws2_32.lib")typedef struct PhyFrame unsigned char DstMAC6;unsigned char SrcMAC6;unsigned short FrameType;PHYFRAME;typedef struct ArpFrameunsigned short HardwareType;unsigned short ProtocolType;unsigned char MACLen;unsigned char IPLen;unsigned short Flag;unsigned char SrcMAC6;unsigned char SrcIP4;unsigned char DstMAC6;unsigned char DstIP4;unsigned char Padding18;ARPFRAME;typedef struct ArpPacket PHYFRAME phyFrame; ARPFRAME arpFrame;*ARPPACKET;ArpPacket arpPacket;int CheckMAC(char *argv,unsigned char *mac_addr)char mac18;int i=0,j=0,k=0;strcpy(mac,argv);int m=strlen(argv);for(i=0;i<m;i+) if(maci<'-'|(maci>'-'&&maci<'0')|(maci>'9'&&maci<'A')|(maci>'Z'&&maci<'a')|maci>'z') cout<<"mac address error"<<endl; return 0; else if(maci!='-') j+; else k+; if(j>2) cout<<"mac address errot"<<endl; return 0; else j=0; if(k>5) cout<<"mac address error"<<endl; return 0; for(i=0;i<6;i+)while(*(mac+j)='-')j+;if(*(mac+j)>='0'&&*(mac+j)<='9')mac_addri=(unsigned char)(*(mac+j)-'0');if(*(mac+j)>='a'&&*(mac+j)<='z')mac_addri=(unsigned char)(*(mac+j)-'a'+10); if(*(mac+j)>='A'&&*(mac+j)<='Z') mac_addri=(unsigned char)(*(mac+j)-'A'+10); j+; mac_addri*=16;if(*(mac+j)>='0'&&*(mac+j)<='9')mac_addri+=(unsigned char)(*(mac+j)-'0');if(*(mac+j)>='a'&&*(mac+j)<='z')mac_addri+=(unsigned char)(*(mac+j)-'a'+10);if(*(mac+j)>='A'&&*(mac+j)<='Z')mac_addri+=(unsigned char)(*(mac+j)-'A'+10);j+;return 1;int CheckIP(char *argv,unsigned char *ip_addr) char ip16;int i=0,j=0,k=0;strcpy(ip,argv);int m=strlen(argv);for(i=0;i<m;i+) if(ipi<'.'|(ipi>'.'&&ipi<'0')|ipi>'9') cout<<"IP address error!"<<endl; return 0; else if(ipi!='.') j+; else k+; if(j>3) cout<<"IP address error!"<<endl; return 0; else j=0; if(k>3) cout<<"IP address error!"<<endl; return 0; for(i=0;i<4;i+) while(*(ip+j)='.') j+; ip_addri=(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;int i=0;memset(&arpPacket,0,sizeof(arpPacket);if(!CheckMAC(argv4,arpPacket.phyFrame.DstMAC)return;if(!CheckMAC(argv2,arpPacket.phyFrame.SrcMAC)return;arpPacket.phyFrame.FrameType=htons(unsigned short)0x0608);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(argv2,arpPacket.arpFrame.SrcMAC)return;if(!CheckIP(argv1,arpPacket.arpFrame.SrcIP)return;if(!CheckMAC(argv4,arpPacket.arpFrame.DstMAC)return;if(!CheckIP(argv3,arpPacket.arpFrame.DstIP)return;for(i=0;i<18;i+)arpPacket.arpFrame.Paddingi=0;pcap_if_t *alldevs;pcap_if_t *d,*head=NULL;pcap_t *fp;char errbufPCAP_ERRBUF_SIZE;if(pcap_findalldevs(&alldevs,errbuf)=-1) cout<<"Unable to create adapter list!"<<endl;return;i=0;for(d=alldevs;d;d=d->next) cout<<+i<<": "<<d->name; if(d->description) cout<<" "<<d->description<<endl;if(i=0) cout<<"No adapter found!"<<endl;return;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; if(fp=pcap_open_live(head->name,1000,1,1000,errbuf)=NULL) cout<<"Unable to open the adapter!"<<endl; pcap_freealldevs(alldevs); return;if(pcap_sendpacket(fp,(unsigned char*)&arpPacket,sizeof(unsigned char*)&arpPacket)=-1) cout<<"ARP packet send error!"<<endl; return;cout<<"Source MAC: "<<argv1<<endl;cout<<"Source IP: "<<argv2<<endl;cout<<"Dest MAC: "<<argv3<<endl;cout<<"Dest MAC: "<<argv4<<endl;cout<<"ARP packet send success!"<<endl;结果截图专心-专注-专业
