Make sure prototypes are always included, make some functions static and
[ira/wip.git] / source4 / nbt_server / dgram / netlogon.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    NBT datagram netlogon server
5
6    Copyright (C) Andrew Tridgell        2005
7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
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 "nbt_server/nbt_server.h"
25 #include "lib/socket/socket.h"
26 #include "lib/ldb/include/ldb.h"
27 #include "dsdb/samdb/samdb.h"
28 #include "auth/auth.h"
29 #include "../lib/util/util_ldb.h"
30 #include "param/param.h"
31 #include "smbd/service_task.h"
32 #include "cldap_server/cldap_server.h"
33 #include "libcli/security/security.h"
34 #include "nbt_server/dgram/proto.h"
35
36 /*
37   reply to a GETDC request
38  */
39 static void nbtd_netlogon_getdc(struct dgram_mailslot_handler *dgmslot, 
40                                 struct nbtd_interface *iface,
41                                 struct nbt_dgram_packet *packet, 
42                                 const struct socket_address *src,
43                                 struct nbt_netlogon_packet *netlogon)
44 {
45         struct nbt_name *name = &packet->data.msg.dest_name;
46         struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
47         struct nbt_netlogon_response_from_pdc *pdc;
48         const char *ref_attrs[] = {"nETBIOSName", NULL};
49         struct ldb_message **ref_res;
50         struct ldb_context *samctx;
51         struct ldb_dn *partitions_basedn;
52         struct nbt_netlogon_response netlogon_response;
53         int ret;
54
55         /* only answer getdc requests on the PDC or LOGON names */
56         if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
57                 return;
58         }
59
60         samctx = iface->nbtsrv->sam_ctx;
61
62         if (!samdb_is_pdc(samctx)) {
63                 DEBUG(2, ("Not a PDC, so not processing LOGON_PRIMARY_QUERY\n"));
64                 return;         
65         }
66
67         partitions_basedn = samdb_partitions_dn(samctx, packet);
68
69         ret = gendb_search(samctx, packet, partitions_basedn, &ref_res, ref_attrs,
70                            "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))", 
71                            name->name);
72         
73         if (ret != 1) {
74                 DEBUG(2,("Unable to find domain reference '%s' in sam\n", name->name));
75                 return;
76         }
77
78         /* setup a GETDC reply */
79         ZERO_STRUCT(netlogon_response);
80         netlogon_response.response_type = NETLOGON_GET_PDC;
81         pdc = &netlogon_response.data.get_pdc;
82
83         pdc->command = NETLOGON_RESPONSE_FROM_PDC;
84         pdc->pdc_name         = lp_netbios_name(iface->nbtsrv->task->lp_ctx);
85         pdc->unicode_pdc_name = pdc->pdc_name;
86         pdc->domain_name      = samdb_result_string(ref_res[0], "nETBIOSName", name->name);;
87         pdc->nt_version       = 1;
88         pdc->lmnt_token       = 0xFFFF;
89         pdc->lm20_token       = 0xFFFF;
90
91         dgram_mailslot_netlogon_reply(reply_iface->dgmsock, 
92                                       packet, 
93                                       lp_netbios_name(iface->nbtsrv->task->lp_ctx),
94                                       netlogon->req.pdc.mailslot_name,
95                                       &netlogon_response);
96 }
97
98
99 /*
100   reply to a ADS style GETDC request
101  */
102 static void nbtd_netlogon_samlogon(struct dgram_mailslot_handler *dgmslot,
103                                    struct nbtd_interface *iface,
104                                    struct nbt_dgram_packet *packet, 
105                                    const struct socket_address *src,
106                                    struct nbt_netlogon_packet *netlogon)
107 {
108         struct nbt_name *name = &packet->data.msg.dest_name;
109         struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
110         struct ldb_context *samctx;
111         const char *my_ip = reply_iface->ip_address; 
112         struct dom_sid *sid;
113         struct nbt_netlogon_response netlogon_response;
114         NTSTATUS status;
115
116         if (!my_ip) {
117                 DEBUG(0, ("Could not obtain own IP address for datagram socket\n"));
118                 return;
119         }
120
121         /* only answer getdc requests on the PDC or LOGON names */
122         if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
123                 return;
124         }
125
126         samctx = iface->nbtsrv->sam_ctx;
127
128         if (netlogon->req.logon.sid_size) {
129                 sid = &netlogon->req.logon.sid;
130         } else {
131                 sid = NULL;
132         }
133
134         status = fill_netlogon_samlogon_response(samctx, packet, NULL, name->name, sid, NULL, 
135                                                  netlogon->req.logon.user_name, netlogon->req.logon.acct_control, src->addr, 
136                                                  netlogon->req.logon.nt_version, iface->nbtsrv->task->lp_ctx, &netlogon_response.data.samlogon);
137         if (!NT_STATUS_IS_OK(status)) {
138                 DEBUG(2,("NBT netlogon query failed domain=%s sid=%s version=%d - %s\n",
139                          name->name, dom_sid_string(packet, sid), netlogon->req.logon.nt_version, nt_errstr(status)));
140                 return;
141         }
142
143         netlogon_response.response_type = NETLOGON_SAMLOGON;
144
145         packet->data.msg.dest_name.type = 0;
146
147         dgram_mailslot_netlogon_reply(reply_iface->dgmsock, 
148                                       packet, 
149                                       lp_netbios_name(iface->nbtsrv->task->lp_ctx),
150                                       netlogon->req.logon.mailslot_name,
151                                       &netlogon_response);
152 }
153
154
155 /*
156   handle incoming netlogon mailslot requests
157 */
158 void nbtd_mailslot_netlogon_handler(struct dgram_mailslot_handler *dgmslot, 
159                                     struct nbt_dgram_packet *packet, 
160                                     struct socket_address *src)
161 {
162         NTSTATUS status = NT_STATUS_NO_MEMORY;
163         struct nbtd_interface *iface = 
164                 talloc_get_type(dgmslot->private, struct nbtd_interface);
165         struct nbt_netlogon_packet *netlogon = 
166                 talloc(dgmslot, struct nbt_netlogon_packet);
167         struct nbtd_iface_name *iname;
168         struct nbt_name *name = &packet->data.msg.dest_name;
169
170         if (netlogon == NULL) goto failed;
171
172         /*
173           see if the we are listening on the destination netbios name
174         */
175         iname = nbtd_find_iname(iface, name, 0);
176         if (iname == NULL) {
177                 status = NT_STATUS_BAD_NETWORK_NAME;
178                 goto failed;
179         }
180
181         DEBUG(2,("netlogon request to %s from %s:%d\n", 
182                  nbt_name_string(netlogon, name), src->addr, src->port));
183         status = dgram_mailslot_netlogon_parse_request(dgmslot, netlogon, packet, netlogon);
184         if (!NT_STATUS_IS_OK(status)) goto failed;
185
186         switch (netlogon->command) {
187         case LOGON_PRIMARY_QUERY:
188                 nbtd_netlogon_getdc(dgmslot, iface, packet, 
189                                     src, netlogon);
190                 break;
191         case LOGON_SAM_LOGON_REQUEST:
192                 nbtd_netlogon_samlogon(dgmslot, iface, packet, 
193                                        src, netlogon);
194                 break;
195         default:
196                 DEBUG(2,("unknown netlogon op %d from %s:%d\n", 
197                          netlogon->command, src->addr, src->port));
198                 NDR_PRINT_DEBUG(nbt_netlogon_packet, netlogon);
199                 break;
200         }
201
202         talloc_free(netlogon);
203         return;
204
205 failed:
206         DEBUG(2,("nbtd netlogon handler failed from %s:%d to %s - %s\n",
207                  src->addr, src->port, nbt_name_string(netlogon, name),
208                  nt_errstr(status)));
209         talloc_free(netlogon);
210 }