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 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 most (all?) 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_netlogon_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         const char *p;
  69         struct nbt_netlogon_response netlogon;
  70         NTSTATUS status;
  71
  72         status = dgram_mailslot_netlogon_parse_response(dgmslot, packet, packet,
  73                                                         &netlogon);
  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         /* We asked for version 1 only */
  81         if (netlogon.response_type == NETLOGON_SAMLOGON
  82             && netlogon.samlogon.ntver != NETLOGON_NT_VERSION_1) {
  83                 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
  84                 goto done;
  85         }
  86
  87         p = netlogon.samlogon.nt4.server;
  88
  89         DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
  90                    "domain: %s\n", p, netlogon.samlogon.nt4.user_name,
  91                    netlogon.samlogon.nt4.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
 103         status = NT_STATUS_OK;
 104
 105  done:
 106         irpc_send_reply(s->msg, status);
 107 }
 108
 109 static NTSTATUS nbtd_getdcname(struct irpc_message *msg,
 110                                struct nbtd_getdcname *req)
 111 {
 112         struct nbtd_server *server =
 113                 talloc_get_type(msg->private, struct nbtd_server);
 114         struct nbtd_interface *iface = nbtd_find_request_iface(server, req->in.ip_address, true);
 115         struct getdc_state *s;
 116         struct nbt_netlogon_packet p;
 117         struct NETLOGON_SAM_LOGON_REQUEST *r;
 118         struct nbt_name src, dst;
 119         struct socket_address *dest;
 120         struct dgram_mailslot_handler *handler;
 121         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 122
 123         DEBUG(0, ("nbtd_getdcname called\n"));
 124
 125         s = talloc(msg, struct getdc_state);
 126         NT_STATUS_HAVE_NO_MEMORY(s);
 127
 128         s->msg = msg;
 129         s->req = req;
 130
 131         handler = dgram_mailslot_temp(iface->dgmsock, NBT_MAILSLOT_GETDC,
 132                                       getdc_recv_netlogon_reply, s);
 133         NT_STATUS_HAVE_NO_MEMORY(handler);
 134
 135         ZERO_STRUCT(p);
 136         p.command = LOGON_SAM_LOGON_REQUEST;
 137         r = &p.req.logon;
 138         r->request_count = 0;
 139         r->computer_name = req->in.my_computername;
 140         r->user_name = req->in.my_accountname;
 141         r->mailslot_name = handler->mailslot_name;
 142         r->acct_control = req->in.account_control;
 143         r->sid = *req->in.domain_sid;
 144         r->nt_version = NETLOGON_NT_VERSION_1;
 145         r->lmnt_token = 0xffff;
 146         r->lm20_token = 0xffff;
 147
 148         make_nbt_name_client(&src, req->in.my_computername);
 149         make_nbt_name(&dst, req->in.domainname, 0x1c);
 150
 151         dest = socket_address_from_strings(msg, iface->dgmsock->sock->backend_name,
 152                                            req->in.ip_address, 138);
 153         NT_STATUS_HAVE_NO_MEMORY(dest);
 154
 155         status = dgram_mailslot_netlogon_send(iface->dgmsock,
 156                                               &dst, dest,
 157                                               NBT_MAILSLOT_NETLOGON,
 158                                               &src, &p);
 159         if (!NT_STATUS_IS_OK(status)) {
 160                 DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
 161                           nt_errstr(status)));
 162                 return status;
 163         }
 164
 165         msg->defer_reply = true;
 166         return NT_STATUS_OK;
 167 }
 168
 169
 170 /*
 171   register the irpc handlers for the nbt server
 172 */
 173 void nbtd_register_irpc(struct nbtd_server *nbtsrv)
 174 {
 175         NTSTATUS status;
 176         struct task_server *task = nbtsrv->task;
 177
 178         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION,
 179                                nbtd_information, nbtsrv);
 180         if (!NT_STATUS_IS_OK(status)) {
 181                 task_server_terminate(task, "nbtd failed to setup monitoring");
 182                 return;
 183         }
 184
 185         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
 186                                nbtd_getdcname, nbtsrv);
 187         if (!NT_STATUS_IS_OK(status)) {
 188                 task_server_terminate(task, "nbtd failed to setup getdcname "
 189                                       "handler");
 190                 return;
 191         }
 192
 193         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_CHALLENGE,
 194                                nbtd_proxy_wins_challenge, nbtsrv);
 195         if (!NT_STATUS_IS_OK(status)) {
 196                 task_server_terminate(task, "nbtd failed to setup wins challenge "
 197                                       "handler");
 198                 return;
 199         }
 200
 201         status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
 202                                nbtd_proxy_wins_release_demand, nbtsrv);
 203         if (!NT_STATUS_IS_OK(status)) {
 204                 task_server_terminate(task, "nbtd failed to setup wins release demand "
 205                                       "handler");
 206                 return;
 207         }
 208 }