如何在局域网上编一段程序通过IP知道对方的MAC网卡号？许多软件能显示对方的mac.

BCB 2003-02-11 05:02:34

如果你访问了某一个IP地址，在dos下执行命令 arp -a
马上就显示出对方的网卡号MAC，原来MAC在TCP/IP数据包中就有，
怎样用bcb编出一段程序实现这个功能呢? 200分!!!!!!!!!!
String GetMac(char * ip); // 怎样实现？

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lontran 2003-02-20

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#include "winsock.h"
#include "nb30.h"

pepsi1980 2003-02-19

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不好意思，上次漏贴了：（VC)
#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include "iphlpapi.h"

#pragma comment ( lib, "ws2_32.lib" )
#pragma comment ( lib, "Iphlpapi.lib" )
.......（同上）

BCB 2003-02-18

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少了头文件，编译通不过

RomanticProgrammer 2003-02-17

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学习..呵呵.

BCB 2003-02-17

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等俺试好再发分

lontran 2003-02-14

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strcpy((char *)ncb.ncb_callname, "*" );//这个"*"代表获得本机网卡地址，换成IP地址就可以获得局域网内其他机器的网卡地址。
ncb.ncb_buffer =(unsigned char *) &Adapter;
ncb.ncb_length = sizeof(Adapter);
uRetCode = Netbios(&ncb);
if (uRetCode == 0 )
{
AnsiString (Mac).sprintf("%02X%02X%02X%02X%02X%02X",
Adapter.adapt.adapter_address[0],
Adapter.adapt.adapter_address[1],
Adapter.adapt.adapter_address[2],
Adapter.adapt.adapter_address[3],
Adapter.adapt.adapter_address[4],
Adapter.adapt.adapter_address[5]);
Mac=msg.c_str();
return true;
}
else
{
strcat(Mac,"Unknown.");
return false;
}
}

lontran 2003-02-14

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bool MAC(char *Mac)
{
AnsiString msg;
typedef struct _ASTAT_
{
ADAPTER_STATUS adapt;
NAME_BUFFER NameBuff [30];
}ASTAT, *PASTAT;
ASTAT Adapter;
NCB ncb;
UCHAR uRetCode;
char tmp[40];
Mac[0]='\0';
memset( &ncb, 0, sizeof(ncb) );
ncb.ncb_command = NCBRESET;
ncb.ncb_lana_num = 0;
uRetCode = Netbios( &ncb );
if (uRetCode!=0)
{
strcat(Mac,"Init Error!");
return false;
}
memset(&ncb, 0, sizeof(ncb) );
ncb.ncb_command = NCBASTAT;
ncb.ncb_lana_num = 0;

oishi 2003-02-13

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wildhorse01 2003-02-13

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http://www.chinabcb.com/dispbbs.asp?boardID=4&ID=756
这是我从老侃的网站得到的，谢谢老侃：）

wildhorse01 2003-02-13

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nowcan.chinabcb.com上好像有吧？

Jim3 2003-02-13

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学习

NowCan 2003-02-12

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楼上的代码需要Win2k+才行。

BCB 2003-02-12

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要简单通用，最好是c++builder的代码

pepsi1980 2003-02-11

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#include
#include
#include
#include "iphlpapi.h"

#pragma comment ( lib, "ws2_32.lib" )
#pragma comment ( lib, "Iphlpapi.lib" )

void main( int argc, char ** argv )
{
int numberOfHost = 1;
struct hostent *remoteHostent;

//处理命令行参数
if ( argc == 3 )
numberOfHost = atoi( argv[2] );
if ( ( argc >3 ) || ( argc < 2 ) )
{
printf( "RmtHost v0.2 - Get remote HostName /MacAddress\n" );
printf( "by ShotgunLabs ( Shotgun@xici.net )\n\n" );
printf( "Usage　:\n\tRmtHost.exe [RemoteIP] \n\n" );
printf( "Example:\n\tRmtHost.exe 192.168.0.3\n" );
printf( "\tRmtHost.exe 192.168.0.3 255\n\n" );
exit( 0 );
}

//初始化SOCKET
WSADATA wsaData;
int iRet = WSAStartup(MAKEWORD(2,1), &wsaData);
if ( iRet != 0 )
{
printf( "WSAStartup Error:%d\n", GetLastError() );
exit( 0 );
}
int nRemoteAddr = inet_addr( argv[1] );
remoteHostent= (struct hostent*)malloc( sizeof(struct hostent ));
struct in_addr sa;
for ( int i = 0; i < numberOfHost; i ++ )
{
//获取远程机器名
sa.s_addr = nRemoteAddr;
printf( "\nIpAddress : %s\n", inet_ntoa( sa ) );
remoteHostent = gethostbyaddr( (char*)&nRemoteAddr,4, AF_INET );
if ( remoteHostent )
printf( "HostName　: %s\n",remoteHostent->h_name );
else
printf( "gethostbyaddr Error:%d\n",GetLastError() );
//发送ARP查询包获得远程MAC地址

unsigned char macAddress[6];
ULONG macAddLen = 6;
iRet=SendARP(nRemoteAddr, (unsigned long)NULL,(PULONG)&macAddress, &macAddLen);
if ( iRet == NO_ERROR )
{
printf( "MacAddress: " );
for( int i =0; i<6; i++ )
{
printf( "%.2x", macAddress[i] );
if ( i<5 ) printf( "-" );
}
printf( "\n" );
}
else
printf( "SendARP Error:%d\n", GetLastError());
nRemoteAddr = htonl( ntohl( nRemoteAddr ) + 1 );
}
}

NowCan 2003-02-11