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 3 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, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "smbd/service_task.h"
  25 #include "smbd/service.h"
  26 #include "nbt_server/nbt_server.h"
  27 #include "nbt_server/wins/winsserver.h"
  28 #include "librpc/gen_ndr/ndr_irpc.h"
  29 #include "lib/socket/socket.h"
  30 #include "libcli/resolve/resolve.h"
  31 #include "librpc/gen_ndr/ndr_nbt.h"
  32
  33 /*
  34   serve out the nbt statistics
  35 */
  36 static NTSTATUS nbtd_information(struct irpc_message *msg,
  37                                  struct nbtd_information *r)
  38 {
  39         struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);
  40
  41         switch (r->in.level) {
  42         case NBTD_INFO_STATISTICS:
  43                 r->out.info.stats = &server->stats;
  44                 break;
  45         }
  46
  47         return NT_STATUS_OK;
  48 }
  49
  50
  51 /*
  52   winbind needs to be able to do a getdc request, but some windows
  53   servers always send the reply to port 138, regardless of the request
  54   port. To cope with this we use a irpc request to the NBT server
  55   which has port 138 open, and thus can receive the replies
  56 */
  57 struct getdc_state {
  58         struct irpc_message *msg;
  59         struct nbtd_getdcname *req;
  60 };
  61
  62 static void getdc_recv_ntlogon_reply(struct dgram_mailslot_handler *dgmslot,
  63                                      struct nbt_dgram_packet *packet,
  64                                      struct socket_address *src)
  65 {
  66         struct getdc_state *s =
  67                 talloc_get_type(dgmslot->private, struct getdc_state);
  68
  69         struct nbt_ntlogon_packet ntlogon;
  70         NTSTATUS status;
  71
  72         status = dgram_mailslot_ntlogon_parse(dgmslot, packet, packet,
  73                                               &ntlogon);
  74         if (!NT_STATUS_IS_OK(status)) {
  75                 DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
  76                           nt_errstr(status)));
  77                 goto done;
  78         }
  79
  80         status = NT_STATUS_NO_LOGON_SERVERS;
  81
  82         DEBUG(10, ("reply: command=%d\n", ntlogon.command));
  83
  84         switch (ntlogon.command) {
  85         case NTLOGON_SAM_LOGON:
  86                 DEBUG(0, ("Huh -- got NTLOGON_SAM_LOGON as reply\n"));
  87                 break;
  88         case NTLOGON_SAM_LOGON_REPLY:
  89         case NTLOGON_SAM_LOGON_REPLY15: {
  90                 const char *p = ntlogon.req.reply.server;
  91
  92                 DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
  93                            "domain: %s\n", p, ntlogon.req.reply.user_name,
  94                            ntlogon.req.reply.domain));
  95
  96                 if (*p == '\\') p += 1;
  97                 if (*p == '\\') p += 1;
  98
  99                 s->req->out.dcname = talloc_strdup(s->req, p);
 100                 if (s->req->out.dcname == NULL) {
 101                         DEBUG(0, ("talloc failed\n"));
 102                         status = NT_STATUS_NO_MEMORY;
 103                         goto done;
 104                 }
 105                 status = NT_STATUS_OK;
 106                 break;
 107         }
 108         default:
 109                 DEBUG(0, ("Got unknown packet: %d\n", ntlogon.command));
 110                 break;
 111         }
 112
 113  done:
 114         irpc_send_reply(s->msg, status);
 115 }
 116
 117 static NTSTATUS nbtd_getdcname(struct irpc_message *msg,
 118                                struct nbtd_getdcname *req)
 119 {
 120         struct nbtd_server *server =
 121                 talloc_get_type(msg->private, struct nbtd_server);
 122         struct nbtd_interface *iface = nbtd_find_request_iface(server, req->in.ip_address, True);
 123         struct getdc_state *s;
 124         struct nbt_ntlogon_packet p;
 125         struct nbt_ntlogon_sam_logon *r;
 126         struct nbt_name src, dst;
 127         struct socket_address *dest;
 128         struct dgram_mailslot_handler *handler;
 129         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 130
 131         DEBUG(0, ("nbtd_getdcname called\n"));
 132
 133         s = talloc(msg, struct getdc_state);
 134         NT_STATUS_HAVE_NO_MEMORY(s);
 135
 136         s->msg = msg;
 137         s->req = req;
 138
 139         handler = dgram_mailslot_temp(iface->dgmsock, NBT_MAILSLOT_GETDC,
 140                                       getdc_recv_ntlogon_reply, s);
 141         NT_STATUS_HAVE_NO_MEMORY(handler);
 142
 143         ZERO_STRUCT(p);
 144         p.command = NTLOGON_SAM_LOGON;
 145         r = &p.req.logon;
 146         r->request_count = 0;
 147         r->computer_name = req->in.my_computername;
 148         r->user_name = req->in.my_accountname;
 149         r->mailslot_name = handler->mailslot_name;
 150         r->acct_control = req->in.account_control;
 151         r->sid = *req->in.domain_sid;
 152         r->nt_version = 1;
 153         r->lmnt_token = 0xffff;
 154         r->lm20_token = 0xffff;
 155
 156         make_nbt_name_client(&src, req->in.my_computername);
 157         make_nbt_name(&dst, req->in.domainname, 0x1c);
 158
 159         dest = socket_address_from_strings(msg, iface->dgmsock->sock->backend_name,
 160                                            req->in.ip_address, 138);
 161         NT_STATUS_HAVE_NO_MEMORY(dest);
 162
 163         status = dgram_mailslot_ntlogon_send(iface->dgmsock, DGRAM_DIRECT_GROUP,
 164                                              &dst, dest,
 165                                              &src, &p);
 166         if (!NT_STATUS_IS_OK(status)) {
 167                 DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
 168                           nt_errstr(status)));
 169                 return status;
 170         }
 171
 172         msg->defer_reply = True;
 173         return NT_STATUS_OK;
 174 }
 175
 176
 177 /*
 178   register the irpc handlers for the nbt server
 179 */
 180 void nbtd_register_irpc(struct nbtd_server *nbtsrv)
 181 {
 182         NTSTATUS status;
 183         struct task_server *task = nbtsrv->task;
 184
 185         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION,
 186                                nbtd_information, nbtsrv);
 187         if (!NT_STATUS_IS_OK(status)) {
 188                 task_server_terminate(task, "nbtd failed to setup monitoring");
 189                 return;
 190         }
 191
 192         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
 193                                nbtd_getdcname, nbtsrv);
 194         if (!NT_STATUS_IS_OK(status)) {
 195                 task_server_terminate(task, "nbtd failed to setup getdcname "
 196                                       "handler");
 197                 return;
 198         }
 199
 200         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_CHALLENGE,
 201                                nbtd_proxy_wins_challenge, nbtsrv);
 202         if (!NT_STATUS_IS_OK(status)) {
 203                 task_server_terminate(task, "nbtd failed to setup wins challenge "
 204                                       "handler");
 205                 return;
 206         }
 207
 208         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
 209                                nbtd_proxy_wins_release_demand, nbtsrv);
 210         if (!NT_STATUS_IS_OK(status)) {
 211                 task_server_terminate(task, "nbtd failed to setup wins release demand "
 212                                       "handler");
 213                 return;
 214         }
 215 }