网络编程工程实训

1、网络编程工程实训（一）实验名称 网络编程工程实践综合设计实验（二）实验内容（三）实验要求1、基于WinSock或WinPcap技术，使用C+编程语言，MFC或其它C+框架类库，Visual C+ 2005或后续版本作为开发工具，编程实现整个网络应用程序。软件必须能正确运行，并进行简单的测试。2、简要描述软件需求、软件设计（包括功能模块设计，类设计、界面设计，输入输出设计，代码设计等）、软件实现以及软件测试过程和结果。（四）实验步骤1、需求分析，描述软件需求。 整合第九章程序片段，将第九章的五个实验组合成一个可以运行的程序。2、软件开发，编程实现软件需求。开发环境配置：cc+附加包含目录：E:我

2、的文档Visual Studio 2010WpdPackInclude链接器附加库目录：E:我的文档Visual Studio 2010WpdPackLib链接器附加依赖项添加：Packet.lib;wpcap.lib;ws2_32.lib;利用visual studio 10环境，分别整合五个小实验：1）实验一、利用wincpap获取与网络适配器绑定的设备列表：定义类CFindAllDevs，将main函数改掉以方便整合。头文件如下：#include stdafx.h#pragma onceclass CFindAllDevspublic:CFindAllDevs(void);CFindAl

3、lDevs(void);static int findalldevs(void);CFindAllDevs.cpp如下：#include StdAfx.hCFindAllDevs:CFindAllDevs(void)CFindAllDevs:CFindAllDevs(void)int CFindAllDevs:findalldevs()pcap_if_t *alldevs;pcap_if_t *d;int i=0;char errbufPCAP_ERRBUF_SIZE;if (pcap_findalldevs_ex(PCAP_SRC_IF_STRING,NULL,&alldevs,errbuf

4、)= -1)fprintf(stderr,Error in pcap_findalldevs_ex:%sn,errbuf);exit(1); /打印列表for(d=alldevs;d!=NULL;d=d-next)printf(n%d.%sn,+i,d-name);if(d-description)printf(%s)n,d-description);elseprintf(Nodescriotion available)n);if (i =0)printf(nNo interfaces found!Make sure WinPcap is installed.n);return -1;pcap

5、_freealldevs(alldevs);system(pause);return 0;2)实验二、获取网络适配器的高级属性信息：定义CFindAllDevsAdvancedInfo类，头文件如下：#include stdafx.h#pragma onceclass CFindAllDevsAdvancedInfopublic:CFindAllDevsAdvancedInfo(void);CFindAllDevsAdvancedInfo(void); static int findalldevsadvancedinfo(void);CFindAllDevsAdvancedInfo.cpp：#

6、include StdAfx.h#define IPTOSBUFFERS 12CFindAllDevsAdvancedInfo:CFindAllDevsAdvancedInfo(void)CFindAllDevsAdvancedInfo:CFindAllDevsAdvancedInfo(void)char *iptos(u_long in) static char outputIPTOSBUFFERS3*4+3+1; static short which; u_char *p; p=(u_char *)∈ which = (which +1 =IPTOSBUFFERS ?0:which+

7、1); sprintf(outputwhich,%d.%d.%d.%d,p0,p1,p2,p3); return outputwhich; char* ip6tos(struct sockaddr *sockaddr,char *address,int addrlen) socklen_t sockaddrlen; #ifdef WIN32 sockaddrlen = sizeof(struct sockaddr_in6); #else sockaddrlen = sizeof(struct sockaddr_storage); #endif if(getnameinfo(sockaddr,

8、sockaddrlen, address, addrlen, NULL, 0, NI_NUMERICHOST)!= 0) address=NULL; return address;void ifprint(pcap_if_t *d) pcap_addr_t *a; char ip6str128; /打印?名?称? printf(%sn,d-name); /打印?描述?信?息 if (d-description) printf(tDescription:%sn,d-description); printf(tLoopback:%sn,(d-flags &PCAP_IF_LOOPBACK)?YES

9、:NO); /打印?地?址信?息 for(a=d-addresses;a;a=a-next) printf(tAddress Family:#%dn,a-addr-sa_family); switch(a-addr-sa_family) case AF_INET: printf(tAddress Family Name:AF_Inetn); if(a-addr) printf(tAddress:%sn,iptos(struct sockaddr_in*)a-addr)-sin_addr.s_addr); if(a-netmask) printf(tNetmask:%sn,iptos(struc

10、t sockaddr_in*)a-netmask)-sin_addr.s_addr); if(a-broadaddr) printf(tBroadcast Address: %s n,iptos(struct sockaddr_in*)a-broadaddr)-sin_addr.s_addr); if(a-dstaddr) printf(tDestination Address: %sn,iptos(struct sockaddr_in*)a-dstaddr)-sin_addr.s_addr); break; case AF_INET6: printf(tAddress Family Name

11、:AF_INET6n); #ifndef _MINGW32_ if (a-addr) printf(tAddress:%sn,ip6tos(a-addr,ip6str,sizeof(ip6str); #endif break; default: printf(tAddress Family Name:Unknownn); break; printf(n);int CFindAllDevsAdvancedInfo:findalldevsadvancedinfo(void)pcap_if_t *alldevs; pcap_if_t *d; char errbufPCAP_ERRBUF_SIZE+1

12、; if(pcap_findalldevs_ex(PCAP_SRC_IF_STRING,NULL,&alldevs,errbuf)= -1) fprintf(stderr,Error in pcap_findalldevs:%sn,errbuf); exit(1); for(d=alldevs;d;d=d-next) ifprint(d); pcap_freealldevs(alldevs); system(pause);return 0;3)实验三、打开网络适配器并实现抓包功能：定义CPacp_Loop类，头文件如下：#include stdafx.h#pragma onceclass CP

13、acp_Looppublic:CPacp_Loop(void);CPacp_Loop(void);static int pacp_loop(void);CPacp_Loop.cpp：#include StdAfx.hCPacp_Loop:CPacp_Loop(void)CPacp_Loop:CPacp_Loop(void)void packet_dandler(u_char *param,const struct pcap_pkthdr *header,const u_char *pkt_data)struct tm *ltime;char timestr16;time_t local_tv_

14、sec;local_tv_sec= header-ts.tv_sec;ltime=localtime(&local_tv_sec);strftime(timestr,sizeof timestr,%H:%M:%S,ltime);printf(%s,%.6d len:%dn,timestr,header-ts.tv_usec,header-len);int CPacp_Loop:pacp_loop(void)pcap_if_t *alldevs;pcap_t *adhandle; int inum; int i=0; char errbufPCAP_ERRBUF_SIZE; if (pcap_f

15、indalldevs_ex(PCAP_SRC_IF_STRING,NULL,&alldevs,errbuf)=-1) fprintf(stderr,Error in pcap_findalldevs:%sn,errbuf);exit(1); pcap_if_t *d; for(d=alldevs;d;d=d-next) printf(%d.%s,+i,d-name);if(d-description)printf(%s)n,d-description);elseprintf(没有有效的信息描述。)n); if(i=0) printf(n未发现网络接口！n); return -1; printf

16、(请输入要捕获数据包的网络接口编号?(1-%d):,i); scanf(%d,&inum); if(inumi)printf(n接口编号越界n);pcap_freealldevs(alldevs); return -1; for(d=alldevs,i=0;inext,i+); if(adhandle=pcap_open(d-name, 65536, PCAP_OPENFLAG_PROMISCUOUS, 1000, NULL, errbuf )=NULL) fprintf(stderr,n无法打开网络适配器Wincap不支持%sn,d-name);pcap_freealldevs(alldev

17、s); return -1; printf(n在%s上启动监听n,d-description); pcap_freealldevs(alldevs); pcap_loop(adhandle,0,packet_dandler,NULL);return 0;4)实验四、不适用事件处理器进行抓包：定义CPcap_Next_Ex类，头文件如下：#include stdafx.h#pragma onceclass CPcap_Next_Expublic:CPcap_Next_Ex(void);CPcap_Next_Ex(void);static int Pcap_next_ex();CPcap_Next

18、_Ex.cpp：#include StdAfx.hCPcap_Next_Ex:CPcap_Next_Ex(void)CPcap_Next_Ex:CPcap_Next_Ex(void)int CPcap_Next_Ex:Pcap_next_ex()pcap_if_t *alldevs;pcap_if_t *d;pcap_t *adhandle;int inum;int i=0;char errbufPCAP_ERRBUF_SIZE;struct tm *ltime;char timestr16;struct pcap_pkthdr *header;const u_char *pkt_data;i

19、f (pcap_findalldevs_ex(PCAP_SRC_IF_STRING,NULL, &alldevs,errbuf)= -1)fprintf(stderr,Error in pcap_findalldevs:%sn,errbuf);exit(1);for(d=alldevs;d;d=d-next)printf(%d.%s,+i,d-name);if(d-description)printf(%s)n,d-description);elseprintf(No description acailable)n);if(i=0)printf(nNo interfaces found!Mak

20、e sure WinPcap is installed.n);return -1;printf(Enter the interface number(1-%d):,i);scanf(%d,&inum);/如果选择的设备越界，则返回if (inum i)printf(nInterface number out of range.n);pcap_freealldevs(alldevs);return -1;for(d=alldevs,i=0;inext,i+);/打开设备if(adhandle=pcap_open(d-name,/设备名 65536,/要捕捉的数据包的部分/65535保证能捕获到不

21、同数据链路层上的每个数据包的全部内容 PCAP_OPENFLAG_PROMISCUOUS,/混杂模式1000, /读取超时时间NULL,/远程机器验证errbuf/错误缓冲池)=NULL)fprintf(stderr,nUable to open the adapter.%s is not supported by WinPcapn,d-name);/释放设列表pcap_freealldevs(alldevs);return -1;printf(nlistening on %s.n,d-description);/释放设备列表pcap_freealldevs(alldevs);/获取数据包in

22、t res;int outtime = 1;while(res = pcap_next_ex(adhandle,&header,&pkt_data)=0)if(res = 0)outtime += 1;/超时时间到if(outtime10)getchar();char ch;printf(数据包获取超时，是否要继续获取(Y/N):);scanf(%c,&ch);if(ch = N)return 1;elseouttime = 1;continue;time_t local_tv_sec = header-ts.tv_sec;ltime=localtime(&local_tv_sec);strf

23、time(timestr,sizeof timestr,%H:%M:%S,ltime);printf(%s,%.6d len:%dn,timestr,header-ts.tv_usec,header-len);outtime = 1; if(res = -1)printf(Error reading the pcakets:%sn,pcap_geterr(adhandle);return -1;return 0;5)实验五、过滤数据包：定义CUDPDump类，头文件如下：#pragma once#include stdafx.hclass CUDPDumppublic:CUDPDump(voi

24、d);CUDPDump(void);static int UDPdump(void);CUDPDump.cpp：#include StdAfx.hCUDPDump:CUDPDump(void)CUDPDump:CUDPDump(void)typedef struct ip_addressu_char byte1;u_char byte2;u_char byte3;u_char byte4;ip_address;typedef struct ip_headeru_char ver_ihl; /版本（4bits）部首长度（4bits）u_char tos; /服务类型(Type of servic

25、e)u_short stlen; /总长(Total length)u_short identification; /标识(Identification)u_short flags_fo; /标志位u_char ttl; /存活时间(Time to live)u_char proto; /协议(Protocol)u_short crc; /首部检验和(Header checksum)ip_address saddr; /源地址(Source address)ip_address daddr; /目的地址(Destination address) u_int op_pad; /选项与填充?（Op

26、tion+Padding)ip_header;typedef struct udp_headeru_short sport; /源端口(Source port)u_short dport; /目的端口（Destination port)u_short len; /UDP数据包长度（Datagram length）u_short crc; /检验和(Checksum)udp_header;void packet_handler(u_char *param,const struct pcap_pkthdr *header,const u_char *pkt_data)struct tm *ltim

27、e;char timestr16;ip_header *ih;udp_header *uh;u_int ip_len;u_short sport,dport;time_t local_tv_sec;local_tv_sec =header-ts.tv_sec;/将时间戳转换成可识别的格式local_tv_sec =header-ts.tv_sec;ltime=localtime(&local_tv_sec);strftime(timestr,sizeof timestr,%H:%M:%S,ltime);/打印数据包的时间戳和长度printf(%s.%.6d len:%d,timestr,hea

28、der-ts.tv_usec,header-len);/获得IP数据包头布的位置ih=(ip_header *) (pkt_data + 14);/以太网头部长度/获得UDP首部的位置ip_len=(ih-ver_ihl & 0xf)*4;uh=(udp_header *) (u_char*)ih +ip_len);/将网络字节顺序转换成主机的字节顺序sport = ntohs(uh-sport);dport = ntohs(uh-dport);/打印IP地址和UDP端口printf(%d.%d.%d.%d.%d-%d.%d.%d.%d.%dn,ih-saddr.byte1,ih-saddr.

29、byte2,ih-saddr.byte3,ih-saddr.byte4,sport,ih-daddr.byte1,ih-daddr.byte2,ih-daddr.byte3,ih-daddr.byte4,dport);int CUDPDump:UDPdump(void)pcap_if_t *alldevs;pcap_if_t *d;int inum;int i=0;pcap_t *adhandle;char errbufPCAP_ERRBUF_SIZE;u_int netmask;char packet_filter=ip and udp;struct bpf_program fcode;if

30、(pcap_findalldevs_ex(PCAP_SRC_IF_STRING,NULL,&alldevs,errbuf)=-1)fprintf(stderr,Error in pcap_findalldevs:%sn,errbuf);exit(1);/打印列表for(d=alldevs;d;d=d-next)printf(%d.%s,+i,d-name);if(d-description)printf(%s)n,d-description);elseprintf(Nodescriotion available)n);if(i=0)printf(nNo interfaces found!n);

31、return -1;printf(Enter the interface number (1-%d):,i);scanf(%d,&inum);if(inumi)printf(nInterface number out of range.n);pcap_freealldevs(alldevs);return -1;/跳转到已选设备for(d=alldevs,i=0;inext,i+);/打开适配器if(adhandle=pcap_open(d-name,/设备名 65536,/要捕捉的数据包的部分PCAP_OPENFLAG_PROMISCUOUS,/混杂模式1000, /读取超时时间NULL,

32、/远程机器验证errbuf /错误缓冲池)=NULL)fprintf(stderr,nUnable to open the adapter.%s is not supported by Wincpcapn);/释放设备列表pcap_freealldevs(alldevs);return -1;/检查数据链滤层if(pcap_datalink(adhandle)!=DLT_EN10MB)fprintf(stderr,nThis program works only on Ethernet networks.n);/释放设备列表pcap_freealldevs(alldevs);return -1

33、;if(d-addresses!=NULL)/获得接口第一个地址的掩码netmask=(struct sockaddr_in *)(d-addresses-netmask)-sin_addr.S_un.S_addr;else/如果接口没有地址我们假设一个C类的掩码? netmask=0xffffff;/编译过滤器if(pcap_compile(adhandle,&fcode,packet_filter,1,netmask)0)fprintf(stderr,nUnable to compile the pcaket filter,Check the syntax.n);/释放设备列表pcap_f

34、reealldevs(alldevs);return -1;/设置过滤器if(pcap_setfilter(adhandle,&fcode)description);pcap_freealldevs(alldevs);/开始捕捉pcap_loop(adhandle,0,packet_handler,NULL);return 0;6)本程序的主函数：在主函数中利用菜单程序将五个实验整合成一个程序：/ WinPcap_CH9.cpp : 定义?控?制?台应|用?程序的?入?口点?。/#include stdafx.hint menu_select()char s;int cn;printf(=n);printf(| 请选择你想进行的操作： |n);printf(| |n);printf(| 1. 获取网络适配器