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 "nbt_server/nbt_server.h"
  27 #include "nbt_server/wins/winsserver.h"
  28 #include "lib/socket/socket.h"
  29 #include "libcli/resolve/resolve.h"
  30
  31 /*
  32   serve out the nbt statistics
  33 */
  34 static NTSTATUS nbtd_information(struct irpc_message *msg,
  35                                  struct nbtd_information *r)
  36 {
  37         struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);
  38
  39         switch (r->in.level) {
  40         case NBTD_INFO_STATISTICS:
  41                 r->out.info.stats = &server->stats;
  42                 break;
  43         }
  44
  45         return NT_STATUS_OK;
  46 }
  47
  48
  49 /*
  50   winbind needs to be able to do a getdc request, but some windows
  51   servers always send the reply to port 138, regardless of the request
  52   port. To cope with this we use a irpc request to the NBT server
  53   which has port 138 open, and thus can receive the replies
  54 */
  55 struct getdc_state {
  56         struct irpc_message *msg;
  57         struct nbtd_getdcname *req;
  58 };
  59
  60 static void getdc_recv_ntlogon_reply(struct dgram_mailslot_handler *dgmslot,
  61                                      struct nbt_dgram_packet *packet,
  62                                      struct socket_address *src)
  63 {
  64         struct getdc_state *s =
  65                 talloc_get_type(dgmslot->private, struct getdc_state);
  66
  67         struct nbt_ntlogon_packet ntlogon;
  68         NTSTATUS status;
  69
  70         status = dgram_mailslot_ntlogon_parse(dgmslot, packet, packet,
  71                                               &ntlogon);
  72         if (!NT_STATUS_IS_OK(status)) {
  73                 DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
  74                           nt_errstr(status)));
  75                 goto done;
  76         }
  77
  78         status = NT_STATUS_NO_LOGON_SERVERS;
  79
  80         DEBUG(10, ("reply: command=%d\n", ntlogon.command));
  81
  82         switch (ntlogon.command) {
  83         case NTLOGON_SAM_LOGON:
  84                 DEBUG(0, ("Huh -- got NTLOGON_SAM_LOGON as reply\n"));
  85                 break;
  86         case NTLOGON_SAM_LOGON_REPLY:
  87         case NTLOGON_SAM_LOGON_REPLY15: {
  88                 const char *p = ntlogon.req.reply.server;
  89
  90                 DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
  91                            "domain: %s\n", p, ntlogon.req.reply.user_name,
  92                            ntlogon.req.reply.domain));
  93
  94                 if (*p == '\\') p += 1;
  95                 if (*p == '\\') p += 1;
  96
  97                 s->req->out.dcname = talloc_strdup(s->req, p);
  98                 if (s->req->out.dcname == NULL) {
  99                         DEBUG(0, ("talloc failed\n"));
 100                         status = NT_STATUS_NO_MEMORY;
 101                         goto done;
 102                 }
 103                 status = NT_STATUS_OK;
 104                 break;
 105         }
 106         default:
 107                 DEBUG(0, ("Got unknown packet: %d\n", ntlogon.command));
 108                 break;
 109         }
 110
 111  done:
 112         irpc_send_reply(s->msg, status);
 113 }
 114
 115 static NTSTATUS nbtd_getdcname(struct irpc_message *msg,
 116                                struct nbtd_getdcname *req)
 117 {
 118         struct nbtd_server *server =
 119                 talloc_get_type(msg->private, struct nbtd_server);
 120         struct nbtd_interface *iface = nbtd_find_interface(server, req->in.ip_address);
 121         struct getdc_state *s;
 122         struct nbt_ntlogon_packet p;
 123         struct nbt_ntlogon_sam_logon *r;
 124         struct nbt_name src, dst;
 125         struct socket_address *dest;
 126         struct dgram_mailslot_handler *handler;
 127         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 128
 129         DEBUG(0, ("nbtd_getdcname called\n"));
 130
 131         s = talloc(msg, struct getdc_state);
 132         NT_STATUS_HAVE_NO_MEMORY(s);
 133
 134         s->msg = msg;
 135         s->req = req;
 136
 137         handler = dgram_mailslot_temp(iface->dgmsock, NBT_MAILSLOT_GETDC,
 138                                       getdc_recv_ntlogon_reply, s);
 139         NT_STATUS_HAVE_NO_MEMORY(handler);
 140
 141         ZERO_STRUCT(p);
 142         p.command = NTLOGON_SAM_LOGON;
 143         r = &p.req.logon;
 144         r->request_count = 0;
 145         r->computer_name = req->in.my_computername;
 146         r->user_name = req->in.my_accountname;
 147         r->mailslot_name = handler->mailslot_name;
 148         r->acct_control = req->in.account_control;
 149         r->sid = *req->in.domain_sid;
 150         r->nt_version = 1;
 151         r->lmnt_token = 0xffff;
 152         r->lm20_token = 0xffff;
 153
 154         make_nbt_name_client(&src, req->in.my_computername);
 155         make_nbt_name(&dst, req->in.domainname, 0x1c);
 156
 157         dest = socket_address_from_strings(msg, iface->dgmsock->sock->backend_name,
 158                                            req->in.ip_address, 138);
 159         NT_STATUS_HAVE_NO_MEMORY(dest);
 160
 161         status = dgram_mailslot_ntlogon_send(iface->dgmsock, DGRAM_DIRECT_GROUP,
 162                                              &dst, dest,
 163                                              &src, &p);
 164         if (!NT_STATUS_IS_OK(status)) {
 165                 DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
 166                           nt_errstr(status)));
 167                 return status;
 168         }
 169
 170         msg->defer_reply = True;
 171         return NT_STATUS_OK;
 172 }
 173
 174
 175 /*
 176   register the irpc handlers for the nbt server
 177 */
 178 void nbtd_register_irpc(struct nbtd_server *nbtsrv)
 179 {
 180         NTSTATUS status;
 181         struct task_server *task = nbtsrv->task;
 182
 183         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION,
 184                                nbtd_information, nbtsrv);
 185         if (!NT_STATUS_IS_OK(status)) {
 186                 task_server_terminate(task, "nbtd failed to setup monitoring");
 187                 return;
 188         }
 189
 190         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
 191                                nbtd_getdcname, nbtsrv);
 192         if (!NT_STATUS_IS_OK(status)) {
 193                 task_server_terminate(task, "nbtd failed to setup getdcname "
 194                                       "handler");
 195                 return;
 196         }
 197
 198         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_CHALLENGE,
 199                                nbtd_proxy_wins_challenge, nbtsrv);
 200         if (!NT_STATUS_IS_OK(status)) {
 201                 task_server_terminate(task, "nbtd failed to setup wins challenge "
 202                                       "handler");
 203                 return;
 204         }
 205
 206         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
 207                                nbtd_proxy_wins_release_demand, nbtsrv);
 208         if (!NT_STATUS_IS_OK(status)) {
 209                 task_server_terminate(task, "nbtd failed to setup wins release demand "
 210                                       "handler");
 211                 return;
 212         }
 213 }