【文件属性】：
文件名称：嗅探器源代码
文件大小：5KB
文件格式：TXT
更新时间：2017-07-15 10:10:48
文本
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;
unsigned 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");
}
}
}
