网络嗅探器源代码

#include <winsock2.h> /*windows socket的头文件，系统定义的*/ #include <windows.h>#include <ws2tcpip.h>#include <stdio.h>#include <stdlib.h>#pragma comment(lib,"ws2_32.lib") /*链接API相关连的Ws2_32.lib静态库*/#define MAX_HOSTNAME_LAN 255#define SIO_RCVALL _WSAIOW(IOC_VENDOR,1)#define MAX_ADDR_LEN 16struct ipheader {unsigned char ip_hl:4; /*header length(报头长度）*/unsigned char ip_v:4; /*version(版本)*/unsigned char ip_tos; /*type os service服务类型*/unsigned short int ip_len; /*total length (总长度)*/unsigned short int ip_id; /*identification (标识符)*/unsigned short int ip_off; /*fragment offset field(段移位域)*/unsigned char ip_ttl; /*time to live (生存时间)*/unsigned char ip_p; /*protocol(协议)*/unsigned short int ip_sum; /*checksum(校验和)*/unsigned int ip_src; /*source address(源地址)*/unsigned int ip_dst; /*destination address(目的地址)*/}; /* total ip header length: 20 bytes (=160 bits) */typedef struct tcpheader {unsigned short int sport; /*source port (源端口号)*/unsigned short int dport; /*destination port(目的端口号)*/unsigned int th_seq; /*sequence number(包的序列号)*/unsigned int th_ack; /*acknowledgement number(确认应答号)*/ unsigned char th_x:4; /*unused(未使用)*/unsigned char th_off:4; /*data offset(数据偏移量)*/unsigned char Flags; /*标志全*/unsigned short int th_win; /*windows(窗口)*/unsigned short int th_sum; /*checksum(校验和)*/unsigned short int th_urp; /*urgent pointer(紧急指针)*/}TCP_HDR;typedef struct udphdr {unsigned short sport; /*source port(源端口号)*/unsigned short dport; /*destination port(目的端口号)*/unsigned short len; /*udp length(udp长度)*/unsigned short cksum; /*udp checksum(udp校验和)*/}UDP_HDR;void main(){SOCKET sock;WSADATA wsd;DWORD dwBytesRet;unsigned int optval = 1;unsigned char *dataudp,*datatcp;int i,pCount=0,lentcp, lenudp;SOCKADDR_IN sa,saSource, saDest;struct hostent FAR * pHostent;char FAR name[MAX_HOSTNAME_LAN];char szSourceIP[MAX_ADDR_LEN], szDestIP[MAX_ADDR_LEN],RecvBuf[65535] = {0};struct udphdr *pUdpheader;struct ipheader *pIpheader;struct tcpheader *pTcpheader;WSAStartup(MAKEWORD(2,1),&wsd);if ((sock = socket(AF_INET, SOCK_RAW, IPPROTO_IP))==SOCKET_ERROR) exit(1);gethostname(name, MAX_HOSTNAME_LAN);pHostent = gethostbyname(name);sa.sin_family = AF_INET;sa.sin_port = htons(6000);memcpy(&sa.sin_addr.S_un.S_addr, pHostent->h_addr_list[0], pHostent->h_length);bind(sock, (SOCKADDR *)&sa, sizeof(sa)); /*bind()设定自己主机的IP地址和端口号*/if ((WSAGetLastError())==10013)exit(1);WSAIoctl(sock, SIO_RCVALL, &optval, sizeof(optval), NULL, 0, &dwBytesRet, NULL, NULL);pIpheader = (struct ipheader *)RecvBuf;pTcpheader = (struct tcpheader *)(RecvBuf+ sizeof(struct ipheader ));pUdpheader = (struct udphdr *) (RecvBuf+ sizeof(struct ipheader ));while (1){memset(RecvBuf, 0, sizeof(RecvBuf));recv(sock, RecvBuf, sizeof(RecvBuf), 0);saSource.sin_addr.s_addr = pIpheader->ip_src;strncpy(szSourceIP, inet_ntoa(saSource.sin_addr), MAX_ADDR_LEN);saDest.sin_addr.s_addr = pIpheader->ip_dst;strncpy(szDestIP, inet_ntoa(saDest.sin_addr), MAX_ADDR_LEN);lentcp =(ntohs(pIpheader->ip_len)-(sizeof(struct ipheader)+sizeof(struct tcpheader)));lenudp =(ntohs(pIpheader->ip_len)-(sizeof(struct ipheader)+sizeof(struct udphdr)));if((pIpheader->ip_p)==IPPROTO_TCP&&lentcp!=0){printf("*******************************************\n");pCount++;datatcp=(unsigned char *) RecvBuf+sizeof(struct ipheader)+sizeof(struct tcpheader);printf("-TCP-\n");printf("\n目的IP地址：%s\n",szDestIP);printf("\n目的端口：%i\n",ntohs(pTcpheader->dport));printf("datatcp address->%x\n",datatcp);printf("size of ipheader->%i\n",sizeof(struct ipheader));printf("size of tcpheader->%i\n",sizeof(struct tcpheader));printf("size of the hole packet->%i\n",ntohs(pIpheader->ip_len));printf("\nchar Packet%i [%i]=\"",pCount,lentcp-1);for (i=0;i<lentcp;i++){printf("\\x%.2x",*(datatcp+i));if (i%10==0)printf("\"\n\"");}printf("\";\n\n\n");for (i=0;i<lentcp;i++){if( *(datatcp+i)<=127&&*(datatcp+i)>=20)printf("%c",*(datatcp+i));elseprintf(".");}printf("\n\n*******************************************\n");}if((pIpheader->ip_p)==IPPROTO_UDP&&lentcp!=0){pCount++;dataudp=(unsigned char *) RecvBuf+sizeof(struct ipheader)+sizeof(struct udphdr);printf("-UDP-\n");printf("\n目的IP地址：%s\n",szDestIP);printf("\n目的端口：%d\n",ntohs(pTcpheader->dport));printf("UDP数据地址：%x\n",dataudp);printf("IP头部长度：%i\n",sizeof(struct ipheader));printf("UDP头部长度：%i\n",sizeof(struct udphdr));printf("包的大小：%i\n",ntohs(pIpheader->ip_len));printf("\nchar Packet%i [%i]=\"",pCount,lenudp-1);for (i=0;i<lenudp;i++){printf("\\x%.2x",*(dataudp+i));if (i%10==0)printf("\"\n\"");}printf("\";\n\n\n");for (i=0;i<lenudp;i++){if( *(dataudp+i)<=127&&*(dataudp+i)>=20)printf("%c",*(dataudp+i));elseprintf(".");}printf("\n\n*******************************************\n");}}}。