source4/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
  30 /*
  31   serve out the nbt statistics
  32 */
  33 static NTSTATUS nbtd_information(struct irpc_message *msg,
  34                                  struct nbtd_information *r)
  35 {
  36         struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);
  37
  38         switch (r->in.level) {
  39         case NBTD_INFO_STATISTICS:
  40                 r->out.info.stats = &server->stats;
  41                 break;
  42         }
  43
  44         return NT_STATUS_OK;
  45 }
  46
  47
  48 /*
  49   winbind needs to be able to do a getdc request, but some windows
  50   servers always send the reply to port 138, regardless of the request
  51   port. To cope with this we use a irpc request to the NBT server
  52   which has port 138 open, and thus can receive the replies
  53 */
  54 struct getdc_state {
  55         struct irpc_message *msg;
  56         struct nbtd_getdcname *req;
  57 };
  58
  59 static void getdc_recv_ntlogon_reply(struct dgram_mailslot_handler *dgmslot,
  60                                      struct nbt_dgram_packet *packet,
  61                                      struct socket_address *src)
  62 {
  63         struct getdc_state *s =
  64                 talloc_get_type(dgmslot->private, struct getdc_state);
  65
  66         struct nbt_ntlogon_packet ntlogon;
  67         NTSTATUS status;
  68
  69         status = dgram_mailslot_ntlogon_parse(dgmslot, packet, packet,
  70                                               &ntlogon);
  71         if (!NT_STATUS_IS_OK(status)) {
  72                 DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
  73                           nt_errstr(status)));
  74                 goto done;
  75         }
  76
  77         status = NT_STATUS_NO_LOGON_SERVERS;
  78
  79         DEBUG(10, ("reply: command=%d\n", ntlogon.command));
  80
  81         switch (ntlogon.command) {
  82         case NTLOGON_SAM_LOGON:
  83                 DEBUG(0, ("Huh -- got NTLOGON_SAM_LOGON as reply\n"));
  84                 break;
  85         case NTLOGON_SAM_LOGON_REPLY:
  86         case NTLOGON_SAM_LOGON_REPLY15: {
  87                 const char *p = ntlogon.req.reply.server;
  88
  89                 DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
  90                            "domain: %s\n", p, ntlogon.req.reply.user_name,
  91                            ntlogon.req.reply.domain));
  92
  93                 if (*p == '\\') p += 1;
  94                 if (*p == '\\') p += 1;
  95
  96                 s->req->out.dcname = talloc_strdup(s->req, p);
  97                 if (s->req->out.dcname == NULL) {
  98                         DEBUG(0, ("talloc failed\n"));
  99                         status = NT_STATUS_NO_MEMORY;
 100                         goto done;
 101                 }
 102                 status = NT_STATUS_OK;
 103                 break;
 104         }
 105         default:
 106                 DEBUG(0, ("Got unknown packet: %d\n", ntlogon.command));
 107                 break;
 108         }
 109
 110  done:
 111         irpc_send_reply(s->msg, status);
 112 }
 113
 114 static NTSTATUS nbtd_getdcname(struct irpc_message *msg,
 115                                struct nbtd_getdcname *req)
 116 {
 117         struct nbtd_server *server =
 118                 talloc_get_type(msg->private, struct nbtd_server);
 119         struct nbtd_interface *iface = nbtd_find_interface(server, req->in.ip_address);
 120         struct getdc_state *s;
 121         struct nbt_ntlogon_packet p;
 122         struct nbt_ntlogon_sam_logon *r;
 123         struct nbt_name src, dst;
 124         struct socket_address *dest;
 125         struct dgram_mailslot_handler *handler;
 126         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 127
 128         DEBUG(0, ("nbtd_getdcname called\n"));
 129
 130         s = talloc(msg, struct getdc_state);
 131         NT_STATUS_HAVE_NO_MEMORY(s);
 132
 133         s->msg = msg;
 134         s->req = req;
 135
 136         handler = dgram_mailslot_temp(iface->dgmsock, NBT_MAILSLOT_GETDC,
 137                                       getdc_recv_ntlogon_reply, s);
 138         NT_STATUS_HAVE_NO_MEMORY(handler);
 139
 140         ZERO_STRUCT(p);
 141         p.command = NTLOGON_SAM_LOGON;
 142         r = &p.req.logon;
 143         r->request_count = 0;
 144         r->computer_name = req->in.my_computername;
 145         r->user_name = req->in.my_accountname;
 146         r->mailslot_name = handler->mailslot_name;
 147         r->acct_control = req->in.account_control;
 148         r->sid = *req->in.domain_sid;
 149         r->nt_version = 1;
 150         r->lmnt_token = 0xffff;
 151         r->lm20_token = 0xffff;
 152
 153         make_nbt_name_client(&src, req->in.my_computername);
 154         make_nbt_name(&dst, req->in.domainname, 0x1c);
 155
 156         dest = socket_address_from_strings(msg, iface->dgmsock->sock->backend_name,
 157                                            req->in.ip_address, 138);
 158         NT_STATUS_HAVE_NO_MEMORY(dest);
 159
 160         status = dgram_mailslot_ntlogon_send(iface->dgmsock, DGRAM_DIRECT_GROUP,
 161                                              &dst, dest,
 162                                              &src, &p);
 163         if (!NT_STATUS_IS_OK(status)) {
 164                 DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
 165                           nt_errstr(status)));
 166                 return status;
 167         }
 168
 169         msg->defer_reply = True;
 170         return NT_STATUS_OK;
 171 }
 172
 173
 174 /*
 175   register the irpc handlers for the nbt server
 176 */
 177 void nbtd_register_irpc(struct nbtd_server *nbtsrv)
 178 {
 179         NTSTATUS status;
 180         struct task_server *task = nbtsrv->task;
 181
 182         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION,
 183                                nbtd_information, nbtsrv);
 184         if (!NT_STATUS_IS_OK(status)) {
 185                 task_server_terminate(task, "nbtd failed to setup monitoring");
 186                 return;
 187         }
 188
 189         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
 190                                nbtd_getdcname, nbtsrv);
 191         if (!NT_STATUS_IS_OK(status)) {
 192                 task_server_terminate(task, "nbtd failed to setup getdcname "
 193                                       "handler");
 194                 return;
 195         }
 196
 197         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_CHALLENGE,
 198                                nbtd_proxy_wins_challenge, nbtsrv);
 199         if (!NT_STATUS_IS_OK(status)) {
 200                 task_server_terminate(task, "nbtd failed to setup wins challenge "
 201                                       "handler");
 202                 return;
 203         }
 204
 205         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
 206                                nbtd_proxy_wins_release_demand, nbtsrv);
 207         if (!NT_STATUS_IS_OK(status)) {
 208                 task_server_terminate(task, "nbtd failed to setup wins release demand "
 209                                       "handler");
 210                 return;
 211         }
 212 }