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