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局域网截包程序设计

#define RCVALL_ON 1

#define MAX_ADDR_LEN 16 //点分十进制地址的最大长度

#define MAX_PROTO_TEXT_LEN 16 //子协议名称(如"TCP")最大长度

#define WINSOCK_VERSION MAKEWORD(2, 2)

#pragma comment(lib, "Ws2_32.lib")

#include stdio.h

#include winsock2.h

#include mstcpip.h

#include conio.h

typedef struct iphdr //定义IP首部

{

unsigned char h_lenver; //4位首部长度+4位IP版本号

unsigned char tos; //8位服务类型TOS

unsigned short total_len; //16位总长度(字节)

unsigned short ident; //16位标识

unsigned short frag_and_flags; //3位标志位

unsigned char ttl; //8位生存时间 TTL

unsigned char proto; //8位协议 (TCP, UDP 或其他)

unsigned short checksum; //16位IP首部校验和

unsigned int sourceIP; //32位源IP地址

unsigned int destIP; //32位目的IP地址

}IPHeader;

typedef struct _tcphdr //定义TCP首部

{

USHORT th_sport; //16位源端口

USHORT th_dport; //16位目的端口

unsigned int th_seq; //32位序列号

unsigned int th_ack; //32位确认号

unsigned char th_lenres; //4位首部长度/6位保留字

unsigned char th_flag; //6位标志位

USHORT th_win; //16位窗口大小

USHORT th_sum; //16位校验和

USHORT th_urp; //16位紧急数据偏移量

}TCP_HEADER;

typedef struct _udphdr //定义UDP首部

{

unsigned short uh_sport; //16位源端口

unsigned short uh_dport; //16位目的端口

unsigned short uh_len; //16位长度

unsigned short uh_sum; //16位校验和

}UDP_HEADER;

typedef struct _icmphdr //定义ICMP首部

{

BYTE i_type; //8位类型

BYTE i_code; //8位代码

USHORT i_cksum; //16位校验和

USHORT i_id; //识别号(一般用进程号作为识别号)

USHORT i_seq; //报文序列号

ULONG timestamp; //时间戳

}ICMP_HEADER;

int iTTL,iLEN,iBYTES;

char szSourceIP[MAX_ADDR_LEN], szDestIP[MAX_ADDR_LEN];

int iSourcePort,iDestPort;

int fflag=0;//file flag

#define PACKAGE_SIZE sizeof(IPHeader)+1000

void HandleError(char *func);

//functions

int DecodeTcpPack(char *, int,FILE *); //TCP解包函数

int DecodeUdpPack(char *, int,FILE *); //UDP解包函数

int DecodeIcmpPack(char *, int,FILE *); //ICMP解包函数

//MAIN

int main(int argc, char *argv[])

{

sockaddr_in saSource,saDest;

WSAData wsaData;

char buf[PACKAGE_SIZE];

WSAStartup(WINSOCK_VERSION, wsaData);

SOCKET sock = socket(AF_INET, SOCK_RAW, IPPROTO_IP);

if(sock == SOCKET_ERROR)

{

HandleError("socket");

WSACleanup();

return -1;

}

//获取本机IP地址

struct sockaddr_in addr;

memset(addr, 0, sizeof(addr));

//addr.sin_addr.S_un.S_addr = inet_addr("192.168.1.101");

char name[256];

PHOSTENT hostinfo;

if( gethostname ( name, sizeof(name)) == 0)

{

if((hostinfo = gethostbyname(name)) != NULL)

{

memcpy((addr.sin_addr.S_un.S_addr) , (struct in_addr *)*hostinfo-h_addr_list , sizeof((struct in_addr *)*hostinfo-h_addr_list ));

}

}

addr.sin_family = AF_INET;

if(bind(sock, (struct sockaddr*)addr, sizeof(addr)) == SOCKET_ERROR)//bind

{

HandleError("bind");

}

//设置SOCK_RAW为SIO_RCVALL,以便接收所有的IP包

int on = RCVALL_ON;

DWORD num;

if(WSAIoctl(sock, SIO_RCVALL, on, sizeof(on), NULL, 0, num, NULL, NULL) == SOCKET_ERROR)

{

HandleError("wsaIoctl set");

}

struct sockaddr_in from;

int fromlen;

int size;

FILE *fp;

if((fp=fopen("log.txt","w+"))==NULL)

{

printf("open file errer,can't save list to file");

fflag=1;

}

//侦听IP报文

while(!kbhit())

{

memset(buf, 0, sizeof(num));

memset(from, 0, sizeof(from));

fromlen = sizeof(from);

size=recvfrom(sock, buf, PACKAGE_SIZE, 0, (struct sockaddr*)from, fromlen);

if(size == SOCKET_ERROR)

{

if(WSAGetLastError() == WSAEMSGSIZE)

{

HandleError("recvfrom");

continue;

}

}

IPHeader *iph=(IPHeader *)buf;

/**/

//源地址

saSource.sin_addr.s_addr = iph-sourceIP;

strncpy(szSourceIP, inet_ntoa(saSource.sin_addr), MAX_ADDR_LEN);

//目的地址

saDest.sin_addr.s_addr = iph-destIP;

strncpy(szDestIP, inet_ntoa(saDest.sin_addr), MAX_ADDR_LEN);

iTTL = iph-ttl;

//计算IP首部的长度

int IpHeadLen = 4 * (iph-h_lenver 0xf);

//根据协议类型分别调用相应的函数

switch(iph-proto)

{

case IPPROTO_ICMP:

DecodeIcmpPack(buf+IpHeadLen, size,fp);

break;

case IPPROTO_IGMP:

printf("IGMP ");

printf("%15s: -%15s: ", szSourceIP, szDestIP);

printf("%d",size);

printf("%s/n", buf);

break;

case IPPROTO_TCP:

DecodeTcpPack((buf+IpHeadLen),size,fp);

break;

case IPPROTO_UDP:

DecodeUdpPack(buf+IpHeadLen, size,fp);

break;

default:

printf("unknown datagram from %s/n", inet_ntoa(from.sin_addr));

printf("%s/n", buf);

break;

}//end switch

Sleep(200);

}//end while

fclose(fp);

closesocket(sock);

WSACleanup();

printf("Stopped!/n");

getch();

return 0;

}//end of main

//TCP解包程序

int DecodeTcpPack(char * TcpBuf, int iBufSize,FILE *fp)

{

unsigned char FlagMask;FlagMask = 1;

int i;

TCP_HEADER *tcph;

tcph = (TCP_HEADER*)TcpBuf;

//计算TCP首部长度

int TcpHeadLen = tcph-th_lenres4;

TcpHeadLen *= sizeof(unsigned long);

char *TcpData=TcpBuf+TcpHeadLen;

iSourcePort = ntohs(tcph-th_sport);

iDestPort = ntohs(tcph-th_dport);

//输出

printf("TCP ");

printf("%15s:%5d -%15s:%5d ", szSourceIP, iSourcePort, szDestIP, iDestPort);

printf("TTL=%3d ", iTTL);

if(fflag==1)

//判断TCP标志位

for( i=0; i6; i++ )

{

if((tcph-th_flag) FlagMask)

printf("1");

else printf("0");

FlagMask=FlagMask1;

}

printf(" bytes=%4d", iBufSize);

printf("/n");

if(fflag=1)//写入文件

fprintf(fp,"TCP %15s:%5d -%15s:%5d TTL=%3d ------ bytes=%4d/n"

,szSourceIP, iSourcePort, szDestIP, iDestPort, iTTL,iBufSize);

return 0;

}

//UDP解包程序

int DecodeUdpPack(char * UdpBuf, int iBufSize,FILE *fp)

{

UDP_HEADER *udph;

udph = (UDP_HEADER*)UdpBuf;

iSourcePort = ntohs(udph-uh_sport);

iDestPort = ntohs(udph-uh_dport);

//输出

printf("UDP ");

printf("%15s:%5d -%15s:%5d ", szSourceIP, iSourcePort, szDestIP, iDestPort);

printf("TTL=%3d ", iTTL);

printf("Len=%4d ", ntohs(udph-uh_len));

printf("bytes=%4d", iBufSize);

printf("/n");

if(fflag=1)//写入文件

fprintf(fp,"UDP %15s:%5d -%15s:%5d TTL=%3d Len=%4d bytes=%4d/n"

,szSourceIP, iSourcePort, szDestIP, iDestPort, iTTL, ntohs(udph-uh_len), iBufSize);

return 0;

}

//ICMP解包程序

int DecodeIcmpPack(char * IcmpBuf, int iBufSize,FILE *fp)

{

ICMP_HEADER * icmph;

icmph = (ICMP_HEADER * )IcmpBuf;

int iIcmpType = icmph-i_type;

int iIcmpCode = icmph-i_code;

//输出

printf("ICMP ");

printf("%15s -%15s ", szSourceIP, szDestIP);

printf("TTL=%3d ", iTTL);

printf("Type%2d,%d ",iIcmpType,iIcmpCode);

printf("bytes=%4d", iBufSize);

printf("/n");

if(fflag=1)//写入文件

fprintf(fp,"ICMP %15s -%15s TTL=%3d Type%2d,%d bytes=%4d"

, szSourceIP, szDestIP, iTTL,iIcmpType,iIcmpCode, iBufSize);

return 0;

}

void HandleError(char *func)

{

char info[65]= {0};

_snprintf(info, 64, "%s: %d/n", func, WSAGetLastError());

printf(info);

}

苹果4,联通4.1(8B117)怎么升级?越狱是什么意思?

越狱是指开放用户的操作权限,使得用户可以随意擦写任何区域的运行状态,只有越狱成功后iPhone的文件系统才处于可读写(rw)状态,可以安装和运行未经过官方认证的第三方程序、插件。

iphone越狱操作步骤如下;

1.在电脑下载安装最新版本itunes和盘古越狱工具。

2.请确认iPhone是否有锁屏密码,如果有的话,请从设置列表中进入“密码”选项,然后关闭锁屏密码。

3.如果打开了 iCloud 中的“查找我的 iPhone”选项的话,也是需要先关闭的。

4.接下来请将iPhone与电脑连接起来,并打开越狱工具。

5.越狱工具提示了当前接入的设备以后,此时就可以点击“开始越狱”按钮,

6.接下来请等待越狱工具对手机进行越狱,在此期间iPhone会自动重启。

7.当越狱完成以后,会要求重新激活iPhone,此时根据提示激活即可。

8.激活iPhone并进入主屏以后,看到了“盘古”越狱应用图标,说明此时越狱成功。

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