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 "smbd/service_task.h"
  25 #include "lib/socket/socket.h"
  26 #include "librpc/gen_ndr/ndr_nbt.h"
  27 #include "param/param.h"
  28
  29 /*
  30   reply to a SAM LOGON request
  31  */
  32 static void nbtd_ntlogon_sam_logon(struct dgram_mailslot_handler *dgmslot,
  33                                    struct nbtd_interface *iface,
  34                                    struct nbt_dgram_packet *packet,
  35                                    const struct socket_address *src,
  36                                    struct nbt_ntlogon_packet *ntlogon)
  37 {
  38         struct nbt_name *name = &packet->data.msg.dest_name;
  39         struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
  40         struct nbt_ntlogon_packet reply;
  41         struct nbt_ntlogon_sam_logon_reply *logon;
  42
  43         /* only answer sam logon requests on the PDC or LOGON names */
  44         if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
  45                 return;
  46         }
  47
  48         /* setup a SAM LOGON reply */
  49         ZERO_STRUCT(reply);
  50         reply.command = NTLOGON_SAM_LOGON_REPLY;
  51         logon = &reply.req.reply;
  52
  53         logon->server           = talloc_asprintf(packet, "\\\\%s",
  54                                                   lpcfg_netbios_name(iface->nbtsrv->task->lp_ctx));
  55         logon->user_name        = ntlogon->req.logon.user_name;
  56         logon->domain           = lpcfg_workgroup(iface->nbtsrv->task->lp_ctx);
  57         logon->nt_version       = 1;
  58         logon->lmnt_token       = 0xFFFF;
  59         logon->lm20_token       = 0xFFFF;
  60
  61         packet->data.msg.dest_name.type = 0;
  62
  63         dgram_mailslot_ntlogon_reply(reply_iface->dgmsock,
  64                                      packet,
  65                                      lpcfg_netbios_name(iface->nbtsrv->task->lp_ctx),
  66                                      ntlogon->req.logon.mailslot_name,
  67                                      &reply);
  68 }
  69
  70 /*
  71   handle incoming ntlogon mailslot requests
  72 */
  73 void nbtd_mailslot_ntlogon_handler(struct dgram_mailslot_handler *dgmslot,
  74                                    struct nbt_dgram_packet *packet,
  75                                    struct socket_address *src)
  76 {
  77         NTSTATUS status = NT_STATUS_NO_MEMORY;
  78         struct nbtd_interface *iface =
  79                 talloc_get_type(dgmslot->private_data, struct nbtd_interface);
  80         struct nbt_ntlogon_packet *ntlogon =
  81                 talloc(dgmslot, struct nbt_ntlogon_packet);
  82         struct nbtd_iface_name *iname;
  83         struct nbt_name *name = &packet->data.msg.dest_name;
  84
  85         if (ntlogon == NULL) goto failed;
  86
  87         /*
  88           see if the we are listening on the destination netbios name
  89         */
  90         iname = nbtd_find_iname(iface, name, 0);
  91         if (iname == NULL) {
  92                 status = NT_STATUS_BAD_NETWORK_NAME;
  93                 goto failed;
  94         }
  95
  96         DEBUG(2,("ntlogon request to %s from %s:%d\n",
  97                  nbt_name_string(ntlogon, name), src->addr, src->port));
  98         status = dgram_mailslot_ntlogon_parse(dgmslot, ntlogon, packet, ntlogon);
  99         if (!NT_STATUS_IS_OK(status)) goto failed;
 100
 101         NDR_PRINT_DEBUG(nbt_ntlogon_packet, ntlogon);
 102
 103         switch (ntlogon->command) {
 104         case NTLOGON_SAM_LOGON:
 105                 nbtd_ntlogon_sam_logon(dgmslot, iface, packet, src, ntlogon);
 106                 break;
 107         default:
 108                 DEBUG(2,("unknown ntlogon op %d from %s:%d\n",
 109                          ntlogon->command, src->addr, src->port));
 110                 break;
 111         }
 112
 113         talloc_free(ntlogon);
 114         return;
 115
 116 failed:
 117         DEBUG(2,("nbtd ntlogon handler failed from %s:%d to %s - %s\n",
 118                  src->addr, src->port, nbt_name_string(ntlogon, name),
 119                  nt_errstr(status)));
 120         talloc_free(ntlogon);
 121 }