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上传时间: 2014-06-25
详细说明： 关于嗅探器的源代码#include #include #include #include #include #pragma comment(lib,"ws2_32.lib") #define MAX_HOSTNAME_LAN 255 #define SIO_RCVALL _WSAIOW(IOC_VENDOR,1) #define MAX_ADDR_LEN 16 struct ipheader { unsigned char ip_hl:4; unsigned char ip_v:4; unsigned char ip_tos; unsigned short int ip_len; unsigned short int ip_id; unsigned short int ip_off; unsigned char ip_ttl; unsigned char ip_p; un signed short int ip_sum; unsigned int ip_src; unsigned int ip_dst; }; typedef struct tcpheader { unsigned short int sport; unsigned short int dport; unsigned int th_seq; unsigned int th_ack; unsigned char th_x:4; unsigned char th_off:4; unsigned char Flags; unsigned short int th_win; unsigned short int th_sum; unsigned short int th_urp; }TCP_HDR; typedef struct udphdr { unsigned short sport; unsigned short dport; unsigned short len; unsigned short cksum; }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)); 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%s\n",szDestIP); printf("\n%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=20) printf("%c",*(datatcp+i)); else printf("."); } 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%s\n",szDestIP); printf("\n%d\n",ntohs(pTcpheader->dport)); printf("UDP%x\n",dataudp); printf("IP%i\n",sizeof(struct ipheader)); printf("UDP%i\n",sizeof(struct udphdr)); printf("%i\n",ntohs(pIpheader->ip_len)); printf("\nchar Packet%i [%i]=\"",pCount,lenudp-1); for (i=0;i=20) printf("%c",*(dataudp+i)); else printf("."); } printf("\n\n*******************************************\n"); } } } ...展开收缩
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