source/nbt_server/irpc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    irpc services for the NBT server
   5
   6    Copyright (C) Andrew Tridgell        2005
   7    Copyright (C) Volker Lendecke        2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25 #include "smbd/service_task.h"
  26 #include "smbd/service.h"
  27 #include "nbt_server/nbt_server.h"
  28 #include "nbt_server/wins/winsserver.h"
  29 #include "librpc/gen_ndr/ndr_irpc.h"
  30 #include "lib/socket/socket.h"
  31 #include "libcli/resolve/resolve.h"
  32 #include "librpc/gen_ndr/ndr_nbt.h"
  33
  34 /*
  35   serve out the nbt statistics
  36 */
  37 static NTSTATUS nbtd_information(struct irpc_message *msg,
  38                                  struct nbtd_information *r)
  39 {
  40         struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);
  41
  42         switch (r->in.level) {
  43         case NBTD_INFO_STATISTICS:
  44                 r->out.info.stats = &server->stats;
  45                 break;
  46         }
  47
  48         return NT_STATUS_OK;
  49 }
  50
  51
  52 /*
  53   winbind needs to be able to do a getdc request, but some windows
  54   servers always send the reply to port 138, regardless of the request
  55   port. To cope with this we use a irpc request to the NBT server
  56   which has port 138 open, and thus can receive the replies
  57 */
  58 struct getdc_state {
  59         struct irpc_message *msg;
  60         struct nbtd_getdcname *req;
  61 };
  62
  63 static void getdc_recv_ntlogon_reply(struct dgram_mailslot_handler *dgmslot,
  64                                      struct nbt_dgram_packet *packet,
  65                                      struct socket_address *src)
  66 {
  67         struct getdc_state *s =
  68                 talloc_get_type(dgmslot->private, struct getdc_state);
  69
  70         struct nbt_ntlogon_packet ntlogon;
  71         NTSTATUS status;
  72
  73         status = dgram_mailslot_ntlogon_parse(dgmslot, packet, packet,
  74                                               &ntlogon);
  75         if (!NT_STATUS_IS_OK(status)) {
  76                 DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
  77                           nt_errstr(status)));
  78                 goto done;
  79         }
  80
  81         status = NT_STATUS_NO_LOGON_SERVERS;
  82
  83         DEBUG(10, ("reply: command=%d\n", ntlogon.command));
  84
  85         switch (ntlogon.command) {
  86         case NTLOGON_SAM_LOGON:
  87                 DEBUG(0, ("Huh -- got NTLOGON_SAM_LOGON as reply\n"));
  88                 break;
  89         case NTLOGON_SAM_LOGON_REPLY:
  90         case NTLOGON_SAM_LOGON_REPLY15: {
  91                 const char *p = ntlogon.req.reply.server;
  92
  93                 DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
  94                            "domain: %s\n", p, ntlogon.req.reply.user_name,
  95                            ntlogon.req.reply.domain));
  96
  97                 if (*p == '\\') p += 1;
  98                 if (*p == '\\') p += 1;
  99
 100                 s->req->out.dcname = talloc_strdup(s->req, p);
 101                 if (s->req->out.dcname == NULL) {
 102                         DEBUG(0, ("talloc failed\n"));
 103                         status = NT_STATUS_NO_MEMORY;
 104                         goto done;
 105                 }
 106                 status = NT_STATUS_OK;
 107                 break;
 108         }
 109         default:
 110                 DEBUG(0, ("Got unknown packet: %d\n", ntlogon.command));
 111                 break;
 112         }
 113
 114  done:
 115         irpc_send_reply(s->msg, status);
 116 }
 117
 118 static NTSTATUS nbtd_getdcname(struct irpc_message *msg,
 119                                struct nbtd_getdcname *req)
 120 {
 121         struct nbtd_server *server =
 122                 talloc_get_type(msg->private, struct nbtd_server);
 123         struct nbtd_interface *iface = nbtd_find_request_iface(server, req->in.ip_address, True);
 124         struct getdc_state *s;
 125         struct nbt_ntlogon_packet p;
 126         struct nbt_ntlogon_sam_logon *r;
 127         struct nbt_name src, dst;
 128         struct socket_address *dest;
 129         struct dgram_mailslot_handler *handler;
 130         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 131
 132         DEBUG(0, ("nbtd_getdcname called\n"));
 133
 134         s = talloc(msg, struct getdc_state);
 135         NT_STATUS_HAVE_NO_MEMORY(s);
 136
 137         s->msg = msg;
 138         s->req = req;
 139
 140         handler = dgram_mailslot_temp(iface->dgmsock, NBT_MAILSLOT_GETDC,
 141                                       getdc_recv_ntlogon_reply, s);
 142         NT_STATUS_HAVE_NO_MEMORY(handler);
 143
 144         ZERO_STRUCT(p);
 145         p.command = NTLOGON_SAM_LOGON;
 146         r = &p.req.logon;
 147         r->request_count = 0;
 148         r->computer_name = req->in.my_computername;
 149         r->user_name = req->in.my_accountname;
 150         r->mailslot_name = handler->mailslot_name;
 151         r->acct_control = req->in.account_control;
 152         r->sid = *req->in.domain_sid;
 153         r->nt_version = 1;
 154         r->lmnt_token = 0xffff;
 155         r->lm20_token = 0xffff;
 156
 157         make_nbt_name_client(&src, req->in.my_computername);
 158         make_nbt_name(&dst, req->in.domainname, 0x1c);
 159
 160         dest = socket_address_from_strings(msg, iface->dgmsock->sock->backend_name,
 161                                            req->in.ip_address, 138);
 162         NT_STATUS_HAVE_NO_MEMORY(dest);
 163
 164         status = dgram_mailslot_ntlogon_send(iface->dgmsock, DGRAM_DIRECT_GROUP,
 165                                              &dst, dest,
 166                                              &src, &p);
 167         if (!NT_STATUS_IS_OK(status)) {
 168                 DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
 169                           nt_errstr(status)));
 170                 return status;
 171         }
 172
 173         msg->defer_reply = True;
 174         return NT_STATUS_OK;
 175 }
 176
 177
 178 /*
 179   register the irpc handlers for the nbt server
 180 */
 181 void nbtd_register_irpc(struct nbtd_server *nbtsrv)
 182 {
 183         NTSTATUS status;
 184         struct task_server *task = nbtsrv->task;
 185
 186         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION,
 187                                nbtd_information, nbtsrv);
 188         if (!NT_STATUS_IS_OK(status)) {
 189                 task_server_terminate(task, "nbtd failed to setup monitoring");
 190                 return;
 191         }
 192
 193         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
 194                                nbtd_getdcname, nbtsrv);
 195         if (!NT_STATUS_IS_OK(status)) {
 196                 task_server_terminate(task, "nbtd failed to setup getdcname "
 197                                       "handler");
 198                 return;
 199         }
 200
 201         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_CHALLENGE,
 202                                nbtd_proxy_wins_challenge, nbtsrv);
 203         if (!NT_STATUS_IS_OK(status)) {
 204                 task_server_terminate(task, "nbtd failed to setup wins challenge "
 205                                       "handler");
 206                 return;
 207         }
 208
 209         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
 210                                nbtd_proxy_wins_release_demand, nbtsrv);
 211         if (!NT_STATUS_IS_OK(status)) {
 212                 task_server_terminate(task, "nbtd failed to setup wins release demand "
 213                                       "handler");
 214                 return;
 215         }
 216 }