1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
|
/*
Unix SMB/CIFS implementation.
endpoint server for the epmapper pipe
Copyright (C) Andrew Tridgell 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "rpc_server/common/common.h"
typedef uint32_t error_status_t;
/* handle types for this module */
enum handle_types {HTYPE_LOOKUP};
/* a endpoint combined with an interface description */
struct dcesrv_ep_iface {
const char *name;
struct dcesrv_ep_description ep_description;
const char *uuid;
uint32_t if_version;
};
/*
simple routine to compare a GUID string to a GUID structure
*/
static int guid_cmp(TALLOC_CTX *mem_ctx, const struct GUID *guid, const char *uuid_str)
{
const char *s = GUID_string(mem_ctx, guid);
if (!s || strcasecmp(s, uuid_str)) {
return -1;
}
return 0;
}
/*
fill a protocol tower
*/
static BOOL fill_protocol_tower(TALLOC_CTX *mem_ctx, struct epm_towers *twr,
struct dcesrv_ep_iface *e)
{
twr->num_floors = 5;
twr->floors = talloc_array_p(mem_ctx, struct epm_floor, 5);
if (!twr->floors) {
return False;
}
twr->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
GUID_from_string(e->uuid, &twr->floors[0].lhs.info.uuid.uuid);
twr->floors[0].lhs.info.uuid.version = e->if_version;
twr->floors[0].rhs.uuid.unknown = 0;
/* encoded with NDR ... */
twr->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
GUID_from_string(NDR_GUID, &twr->floors[1].lhs.info.uuid.uuid);
twr->floors[1].lhs.info.uuid.version = NDR_GUID_VERSION;
twr->floors[1].rhs.uuid.unknown = 0;
/* on an RPC connection ... */
twr->floors[2].lhs.protocol = EPM_PROTOCOL_NCACN;
twr->floors[2].lhs.info.lhs_data = data_blob(NULL, 0);
twr->floors[2].rhs.ncacn.minor_version = 0;
switch (e->ep_description.type) {
case ENDPOINT_SMB:
/* on a SMB pipe ... */
twr->floors[3].lhs.protocol = EPM_PROTOCOL_SMB;
twr->floors[3].lhs.info.lhs_data = data_blob(NULL, 0);
twr->floors[3].rhs.smb.unc = talloc_strdup(mem_ctx, e->ep_description.info.smb_pipe);
/* on an NetBIOS link ... */
twr->floors[4].lhs.protocol = EPM_PROTOCOL_NETBIOS;
twr->floors[4].lhs.info.lhs_data = data_blob(NULL, 0);
twr->floors[4].rhs.netbios.name = talloc_asprintf(mem_ctx, "\\\\%s",
lp_netbios_name());
break;
case ENDPOINT_TCP:
/* on a TCP connection ... */
twr->floors[3].lhs.protocol = EPM_PROTOCOL_TCP;
twr->floors[3].lhs.info.lhs_data = data_blob(NULL, 0);
twr->floors[3].rhs.tcp.port = e->ep_description.info.tcp_port;
/* on an IP link ... */
twr->floors[4].lhs.protocol = EPM_PROTOCOL_IP;
twr->floors[4].lhs.info.lhs_data = data_blob(NULL, 0);
twr->floors[4].rhs.ip.address = 0;
/* TODO: we should fill in our IP address here as a hint to the
client */
break;
}
return True;
}
/*
build a list of all interfaces handled by all endpoint servers
*/
static uint32_t build_ep_list(TALLOC_CTX *mem_ctx,
struct dcesrv_endpoint *endpoint_list,
struct dcesrv_ep_iface **eps)
{
struct dcesrv_endpoint *d;
uint32_t total = 0;
*eps = NULL;
for (d=endpoint_list; d; d=d->next) {
struct dcesrv_if_list *iface;
for (iface=d->interface_list;iface;iface=iface->next) {
(*eps) = talloc_realloc_p(mem_ctx,
*eps,
struct dcesrv_ep_iface,
total + 1);
if (!*eps) {
return 0;
}
(*eps)[total].name = iface->iface.ndr->name;
(*eps)[total].uuid = iface->iface.ndr->uuid;
(*eps)[total].if_version = iface->iface.ndr->if_version;
(*eps)[total].ep_description = d->ep_description;
total++;
}
}
return total;
}
static error_status_t epm_Insert(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_Insert *r)
{
DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
}
static error_status_t epm_Delete(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_Delete *r)
{
DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
}
/*
implement epm_Lookup. This call is used to enumerate the interfaces
available on a rpc server
*/
static error_status_t epm_Lookup(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_Lookup *r)
{
struct dcesrv_handle *h;
struct rpc_eps {
uint32_t count;
struct dcesrv_ep_iface *e;
} *eps;
uint32_t num_ents;
int i;
h = dcesrv_handle_fetch(dce_call->conn, r->in.entry_handle, HTYPE_LOOKUP);
DCESRV_CHECK_HANDLE(h);
eps = h->data;
if (!eps) {
/* this is the first call - fill the list. Subsequent calls
will feed from this list, stored in the handle */
eps = talloc_p(h, struct rpc_eps);
if (!eps) {
return EPMAPPER_STATUS_NO_MEMORY;
}
h->data = eps;
eps->count = build_ep_list(h, dce_call->conn->dce_ctx->endpoint_list, &eps->e);
}
/* return the next N elements */
num_ents = r->in.max_ents;
if (num_ents > eps->count) {
num_ents = eps->count;
}
*r->out.entry_handle = h->wire_handle;
r->out.num_ents = num_ents;
if (num_ents == 0) {
r->out.entries = NULL;
ZERO_STRUCTP(r->out.entry_handle);
dcesrv_handle_destroy(dce_call->conn, h);
return EPMAPPER_STATUS_NO_MORE_ENTRIES;
}
r->out.entries = talloc_array_p(mem_ctx, struct epm_entry_t, num_ents);
if (!r->out.entries) {
return EPMAPPER_STATUS_NO_MEMORY;
}
for (i=0;i<num_ents;i++) {
ZERO_STRUCT(r->out.entries[i].object);
r->out.entries[i].annotation = eps->e[i].name;
r->out.entries[i].tower = talloc_p(mem_ctx, struct epm_twr_t);
if (!r->out.entries[i].tower) {
return EPMAPPER_STATUS_NO_MEMORY;
}
if (!fill_protocol_tower(mem_ctx, &r->out.entries[i].tower->towers, &eps->e[i])) {
return EPMAPPER_STATUS_NO_MEMORY;
}
}
eps->count -= num_ents;
eps->e += num_ents;
return EPMAPPER_STATUS_OK;
}
/*
implement epm_Map. This is used to find the specific endpoint to talk to given
a generic protocol tower
*/
static error_status_t epm_Map(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_Map *r)
{
uint32_t count;
int i;
struct dcesrv_ep_iface *eps;
struct epm_floor *floors;
count = build_ep_list(mem_ctx, dce_call->conn->dce_ctx->endpoint_list, &eps);
ZERO_STRUCT(*r->out.entry_handle);
r->out.num_towers = 1;
r->out.towers = talloc_p(mem_ctx, struct epm_twr_p_t);
if (!r->out.towers) {
return EPMAPPER_STATUS_NO_MEMORY;
}
r->out.towers->twr = talloc_p(mem_ctx, struct epm_twr_t);
if (!r->out.towers->twr) {
return EPMAPPER_STATUS_NO_MEMORY;
}
if (!r->in.map_tower || r->in.max_towers == 0 ||
r->in.map_tower->towers.num_floors != 5) {
goto failed;
}
floors = r->in.map_tower->towers.floors;
if (floors[0].lhs.protocol != EPM_PROTOCOL_UUID ||
floors[1].lhs.protocol != EPM_PROTOCOL_UUID ||
guid_cmp(mem_ctx, &floors[1].lhs.info.uuid.uuid, NDR_GUID) != 0 ||
floors[1].lhs.info.uuid.version != NDR_GUID_VERSION ||
floors[2].lhs.protocol != EPM_PROTOCOL_NCACN) {
goto failed;
}
for (i=0;i<count;i++) {
if (guid_cmp(mem_ctx, &floors[0].lhs.info.uuid.uuid, eps[i].uuid) != 0 ||
floors[0].lhs.info.uuid.version != eps[i].if_version) {
continue;
}
switch (eps[i].ep_description.type) {
case ENDPOINT_SMB:
if (floors[3].lhs.protocol != EPM_PROTOCOL_SMB ||
floors[4].lhs.protocol != EPM_PROTOCOL_NETBIOS) {
continue;
}
break;
case ENDPOINT_TCP:
if (floors[3].lhs.protocol != EPM_PROTOCOL_TCP ||
floors[4].lhs.protocol != EPM_PROTOCOL_IP) {
continue;
}
break;
}
fill_protocol_tower(mem_ctx, &r->out.towers->twr->towers, &eps[i]);
r->out.towers->twr->tower_length = 0;
return EPMAPPER_STATUS_OK;
}
failed:
r->out.num_towers = 0;
r->out.towers->twr = NULL;
return EPMAPPER_STATUS_NO_MORE_ENTRIES;
}
static error_status_t epm_LookupHandleFree(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_LookupHandleFree *r)
{
DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
}
static error_status_t epm_InqObject(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_InqObject *r)
{
DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
}
static error_status_t epm_MgmtDelete(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_MgmtDelete *r)
{
DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
}
static error_status_t epm_MapAuth(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
struct epm_MapAuth *r)
{
DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
}
/* include the generated boilerplate */
#include "librpc/gen_ndr/ndr_epmapper_s.c"
|