source4/nbt_server/dgram/ntlogon.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    NBT datagram ntlogon server
   5
   6    Copyright (C) Andrew Tridgell        2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "nbt_server/nbt_server.h"
  24 #include "lib/socket/socket.h"
  25 #include "librpc/gen_ndr/ndr_nbt.h"
  26 #include "param/param.h"
  27
  28 /*
  29   reply to a SAM LOGON request
  30  */
  31 static void nbtd_ntlogon_sam_logon(struct dgram_mailslot_handler *dgmslot,
  32                                    struct nbtd_interface *iface,
  33                                    struct nbt_dgram_packet *packet,
  34                                    const struct socket_address *src,
  35                                    struct nbt_ntlogon_packet *ntlogon)
  36 {
  37         struct nbt_name *name = &packet->data.msg.dest_name;
  38         struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, False);
  39         struct nbt_ntlogon_packet reply;
  40         struct nbt_ntlogon_sam_logon_reply *logon;
  41
  42         /* only answer sam logon requests on the PDC or LOGON names */
  43         if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
  44                 return;
  45         }
  46
  47         /* setup a SAM LOGON reply */
  48         ZERO_STRUCT(reply);
  49         reply.command = NTLOGON_SAM_LOGON_REPLY;
  50         logon = &reply.req.reply;
  51
  52         logon->server           = talloc_asprintf(packet, "\\\\%s", lp_netbios_name());
  53         logon->user_name        = ntlogon->req.logon.user_name;
  54         logon->domain           = lp_workgroup();
  55         logon->nt_version       = 1;
  56         logon->lmnt_token       = 0xFFFF;
  57         logon->lm20_token       = 0xFFFF;
  58
  59         packet->data.msg.dest_name.type = 0;
  60
  61         dgram_mailslot_ntlogon_reply(reply_iface->dgmsock,
  62                                      packet,
  63                                      ntlogon->req.logon.mailslot_name,
  64                                      &reply);
  65 }
  66
  67 /*
  68   handle incoming ntlogon mailslot requests
  69 */
  70 void nbtd_mailslot_ntlogon_handler(struct dgram_mailslot_handler *dgmslot,
  71                                    struct nbt_dgram_packet *packet,
  72                                    struct socket_address *src)
  73 {
  74         NTSTATUS status = NT_STATUS_NO_MEMORY;
  75         struct nbtd_interface *iface =
  76                 talloc_get_type(dgmslot->private, struct nbtd_interface);
  77         struct nbt_ntlogon_packet *ntlogon =
  78                 talloc(dgmslot, struct nbt_ntlogon_packet);
  79         struct nbtd_iface_name *iname;
  80         struct nbt_name *name = &packet->data.msg.dest_name;
  81
  82         if (ntlogon == NULL) goto failed;
  83
  84         /*
  85           see if the we are listening on the destination netbios name
  86         */
  87         iname = nbtd_find_iname(iface, name, 0);
  88         if (iname == NULL) {
  89                 status = NT_STATUS_BAD_NETWORK_NAME;
  90                 goto failed;
  91         }
  92
  93         DEBUG(2,("ntlogon request to %s from %s:%d\n",
  94                  nbt_name_string(ntlogon, name), src->addr, src->port));
  95         status = dgram_mailslot_ntlogon_parse(dgmslot, ntlogon, packet, ntlogon);
  96         if (!NT_STATUS_IS_OK(status)) goto failed;
  97
  98         NDR_PRINT_DEBUG(nbt_ntlogon_packet, ntlogon);
  99
 100         switch (ntlogon->command) {
 101         case NTLOGON_SAM_LOGON:
 102                 nbtd_ntlogon_sam_logon(dgmslot, iface, packet, src, ntlogon);
 103                 break;
 104         default:
 105                 DEBUG(2,("unknown ntlogon op %d from %s:%d\n",
 106                          ntlogon->command, src->addr, src->port));
 107                 break;
 108         }
 109
 110         talloc_free(ntlogon);
 111         return;
 112
 113 failed:
 114         DEBUG(2,("nbtd ntlogon handler failed from %s:%d to %s - %s\n",
 115                  src->addr, src->port, nbt_name_string(ntlogon, name),
 116                  nt_errstr(status)));
 117         talloc_free(ntlogon);
 118 }