source/namelogon.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    NBT netbios routines and daemon - version 2
   5    Copyright (C) Andrew Tridgell 1994-1995
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21    Revision History:
  22
  23    14 jan 96: lkcl@pires.co.uk
  24    added multiple workgroup domain master support
  25
  26 */
  27
  28 #include "includes.h"
  29
  30 extern int ClientDGRAM;
  31
  32 #define TEST_CODE /* want to debug unknown browse packets */
  33
  34 extern int DEBUGLEVEL;
  35
  36 extern pstring myname;
  37
  38
  39 /****************************************************************************
  40    process a domain logon packet
  41
  42    08aug96 lkcl@pires.co.uk
  43    reply_code == 0xC courtesy of jim@oxfordcc.co.uk forwarded by
  44                                  lewis2@server.uwindsor.ca
  45    **************************************************************************/
  46 void process_logon_packet(struct packet_struct *p,char *buf,int len)
  47 {
  48   struct dgram_packet *dgram = &p->packet.dgram;
  49   struct in_addr ip = dgram->header.source_ip;
  50   struct subnet_record *d = find_subnet(ip);
  51   char *logname,*q;
  52   fstring reply_name;
  53   BOOL add_slashes = False;
  54   pstring outbuf;
  55   int code,reply_code;
  56   struct work_record *work;
  57
  58   if (!d) return;
  59
  60   if (!(work = find_workgroupstruct(d,dgram->dest_name.name, False)))
  61     return;
  62
  63   if (!lp_domain_logons()) {
  64     DEBUG(3,("No domain logons\n"));
  65     return;
  66   }
  67   if (!listening_name(work, &dgram->dest_name))
  68     {
  69       DEBUG(4,("Not listening to that domain\n"));
  70       return;
  71     }
  72
  73   code = SVAL(buf,0);
  74   switch (code) {
  75   case 0:
  76     {
  77       char *machine = buf+2;
  78       char *user = skip_string(machine,1);
  79       logname = skip_string(user,1);
  80       reply_code = 6;
  81       strcpy(reply_name,myname);
  82       strupper(reply_name);
  83       add_slashes = True;
  84       DEBUG(3,("Domain login request from %s(%s) user=%s\n",
  85                machine,inet_ntoa(p->ip),user));
  86     }
  87     break;
  88   case 7:
  89     {
  90       char *machine = buf+2;
  91       logname = skip_string(machine,1);
  92       reply_code = 7;
  93       strcpy(reply_name,lp_domain_controller());
  94       if (!*reply_name) {
  95         strcpy(reply_name,myname);
  96         reply_code = 0xC;
  97       }
  98       strupper(reply_name);
  99       DEBUG(3,("GETDC request from %s(%s), reporting %s 0x%2x\n",
 100                machine,inet_ntoa(p->ip), reply_name, reply_code));
 101     }
 102     break;
 103   default:
 104     DEBUG(3,("Unknown domain request %d\n",code));
 105     return;
 106   }
 107
 108   bzero(outbuf,sizeof(outbuf));
 109   q = outbuf;
 110   SSVAL(q,0,reply_code);
 111   q += 2;
 112   if (add_slashes) {
 113     strcpy(q,"\\\\");
 114     q += 2;
 115   }
 116   StrnCpy(q,reply_name,16);
 117   q = skip_string(q,1);
 118
 119   if (reply_code == 0xC)
 120   {
 121    if ( PTR_DIFF (q,outbuf) & 1 )
 122    {
 123        q++;
 124    }
 125
 126    PutUniCode(q,reply_name);
 127    q += 2*(strlen(reply_name) + 1);
 128
 129    PutUniCode(q,lp_workgroup());
 130    q += 2*(strlen(lp_workgroup()) + 1);
 131
 132    SIVAL(q,0,1);
 133    q += 4;
 134    SSVAL(q,0,0xFFFF);
 135    q += 2;
 136   }
 137
 138   SSVAL(q,0,0xFFFF);
 139   q += 2;
 140
 141   send_mailslot_reply(logname,ClientDGRAM,outbuf,PTR_DIFF(q,outbuf),
 142                       myname,&dgram->source_name.name[0],0x20,0,p->ip,
 143                       *iface_ip(p->ip));
 144 }