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
  28
  29 /*
  30   serve out the nbt statistics
  31 */
  32 static NTSTATUS nbtd_information(struct irpc_message *msg,
  33                                  struct nbtd_information *r)
  34 {
  35         struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);
  36
  37         switch (r->in.level) {
  38         case NBTD_INFO_STATISTICS:
  39                 r->out.info.stats = &server->stats;
  40                 break;
  41         }
  42
  43         return NT_STATUS_OK;
  44 }
  45
  46
  47 /*
  48   winbind needs to be able to do a getdc request, but some windows
  49   servers always send the reply to port 138, regardless of the request
  50   port. To cope with this we use a irpc request to the NBT server
  51   which has port 138 open, and thus can receive the replies
  52 */
  53 struct getdc_state {
  54         struct irpc_message *msg;
  55         struct nbtd_getdcname *req;
  56 };
  57
  58 static void getdc_recv_ntlogon_reply(struct dgram_mailslot_handler *dgmslot,
  59                                      struct nbt_dgram_packet *packet,
  60                                      const char *src_address, int src_port)
  61 {
  62         struct getdc_state *s =
  63                 talloc_get_type(dgmslot->private, struct getdc_state);
  64
  65         struct nbt_ntlogon_packet ntlogon;
  66         NTSTATUS status;
  67
  68         status = dgram_mailslot_ntlogon_parse(dgmslot, packet, packet,
  69                                               &ntlogon);
  70         if (!NT_STATUS_IS_OK(status)) {
  71                 DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
  72                           nt_errstr(status)));
  73                 goto done;
  74         }
  75
  76         status = NT_STATUS_NO_LOGON_SERVERS;
  77
  78         DEBUG(10, ("reply: command=%d\n", ntlogon.command));
  79
  80         switch (ntlogon.command) {
  81         case NTLOGON_SAM_LOGON:
  82                 DEBUG(0, ("Huh -- got NTLOGON_SAM_LOGON as reply\n"));
  83                 break;
  84         case NTLOGON_SAM_LOGON_REPLY: {
  85                 const char *p = ntlogon.req.reply.server;
  86
  87                 DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
  88                            "domain: %s\n", p, ntlogon.req.reply.user_name,
  89                            ntlogon.req.reply.domain));
  90
  91                 if (*p == '\\') p += 1;
  92                 if (*p == '\\') p += 1;
  93
  94                 s->req->out.dcname = talloc_strdup(s->req, p);
  95                 if (s->req->out.dcname == NULL) {
  96                         DEBUG(0, ("talloc failed\n"));
  97                         status = NT_STATUS_NO_MEMORY;
  98                         goto done;
  99                 }
 100                 status = NT_STATUS_OK;
 101                 break;
 102         }
 103         default:
 104                 DEBUG(0, ("Got unknown packet: %d\n", ntlogon.command));
 105                 break;
 106         }
 107
 108  done:
 109         irpc_send_reply(s->msg, status);
 110 }
 111
 112 static NTSTATUS nbtd_getdcname(struct irpc_message *msg,
 113                                struct nbtd_getdcname *req)
 114 {
 115         struct nbtd_server *server =
 116                 talloc_get_type(msg->private, struct nbtd_server);
 117
 118         struct getdc_state *s;
 119         struct nbt_ntlogon_packet p;
 120         struct nbt_ntlogon_sam_logon *r;
 121         struct nbt_dgram_socket *sock;
 122         struct nbt_name src, dst;
 123         struct dgram_mailslot_handler *handler;
 124         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 125
 126         DEBUG(0, ("nbtd_getdcname called\n"));
 127
 128         sock = server->interfaces[0].dgmsock;
 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(sock, 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         status = dgram_mailslot_ntlogon_send(sock, DGRAM_DIRECT_GROUP,
 157                                              &dst, req->in.ip_address, 138,
 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 }