1 /*
2 Unix SMB/CIFS implementation.
3
4 endpoint server for the epmapper pipe
5
6 Copyright (C) Andrew Tridgell 2003
7 Copyright (C) Jelmer Vernooij 2004
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 "librpc/gen_ndr/ndr_epmapper.h"
26 #include "rpc_server/dcerpc_server.h"
27 #include "rpc_server/common/common.h"
28
29 typedef uint32_t error_status_t;
30
31 /* handle types for this module */
32 enum handle_types {HTYPE_LOOKUP};
33
34 /* a endpoint combined with an interface description */
35 struct dcesrv_ep_iface {
36 const char *name;
37 struct epm_tower ep;
38 };
39
40 /*
41 build a list of all interfaces handled by all endpoint servers
42 */
build_ep_list(TALLOC_CTX * mem_ctx,struct dcesrv_endpoint * endpoint_list,struct dcesrv_ep_iface ** eps)43 static uint32_t build_ep_list(TALLOC_CTX *mem_ctx,
44 struct dcesrv_endpoint *endpoint_list,
45 struct dcesrv_ep_iface **eps)
46 {
47 struct dcesrv_endpoint *d;
48 uint32_t total = 0;
49 NTSTATUS status;
50
51 *eps = NULL;
52
53 for (d=endpoint_list; d; d=d->next) {
54 struct dcesrv_if_list *iface;
55 struct dcerpc_binding *description;
56
57 for (iface=d->interface_list;iface;iface=iface->next) {
58 (*eps) = talloc_realloc(mem_ctx,
59 *eps,
60 struct dcesrv_ep_iface,
61 total + 1);
62 if (!*eps) {
63 return 0;
64 }
65 (*eps)[total].name = iface->iface.name;
66
67 description = d->ep_description;
68 description->object = iface->iface.syntax_id;
69
70 status = dcerpc_binding_build_tower(mem_ctx, description, &(*eps)[total].ep);
71 if (NT_STATUS_IS_ERR(status)) {
72 DEBUG(1, ("Unable to build tower for %s\n", iface->iface.name));
73 continue;
74 }
75 total++;
76 }
77 }
78
79 return total;
80 }
81
82
epm_Insert(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_Insert * r)83 static error_status_t epm_Insert(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
84 struct epm_Insert *r)
85 {
86 DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
87 }
88
epm_Delete(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_Delete * r)89 static error_status_t epm_Delete(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
90 struct epm_Delete *r)
91 {
92 DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
93 }
94
95
96 /*
97 implement epm_Lookup. This call is used to enumerate the interfaces
98 available on a rpc server
99 */
epm_Lookup(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_Lookup * r)100 static error_status_t epm_Lookup(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
101 struct epm_Lookup *r)
102 {
103 struct dcesrv_handle *h;
104 struct rpc_eps {
105 uint32_t count;
106 struct dcesrv_ep_iface *e;
107 } *eps;
108 uint32_t num_ents;
109 int i;
110
111 DCESRV_PULL_HANDLE_FAULT(h, r->in.entry_handle, HTYPE_LOOKUP);
112
113 eps = h->data;
114
115 if (!eps) {
116 /* this is the first call - fill the list. Subsequent calls
117 will feed from this list, stored in the handle */
118 eps = talloc(h, struct rpc_eps);
119 if (!eps) {
120 return EPMAPPER_STATUS_NO_MEMORY;
121 }
122 h->data = eps;
123
124 eps->count = build_ep_list(h, dce_call->conn->dce_ctx->endpoint_list, &eps->e);
125 }
126
127 /* return the next N elements */
128 num_ents = r->in.max_ents;
129 if (num_ents > eps->count) {
130 num_ents = eps->count;
131 }
132
133 *r->out.entry_handle = h->wire_handle;
134 r->out.num_ents = talloc(mem_ctx, uint32_t);
135 *r->out.num_ents = num_ents;
136
137 if (num_ents == 0) {
138 r->out.entries = NULL;
139 ZERO_STRUCTP(r->out.entry_handle);
140 talloc_free(h);
141 return EPMAPPER_STATUS_NO_MORE_ENTRIES;
142 }
143
144 r->out.entries = talloc_array(mem_ctx, struct epm_entry_t, num_ents);
145 if (!r->out.entries) {
146 return EPMAPPER_STATUS_NO_MEMORY;
147 }
148
149 for (i=0;i<num_ents;i++) {
150 ZERO_STRUCT(r->out.entries[i].object);
151 r->out.entries[i].annotation = eps->e[i].name;
152 r->out.entries[i].tower = talloc(mem_ctx, struct epm_twr_t);
153 if (!r->out.entries[i].tower) {
154 return EPMAPPER_STATUS_NO_MEMORY;
155 }
156 r->out.entries[i].tower->tower = eps->e[i].ep;
157 }
158
159 eps->count -= num_ents;
160 eps->e += num_ents;
161
162 return EPMAPPER_STATUS_OK;
163 }
164
165
166 /*
167 implement epm_Map. This is used to find the specific endpoint to talk to given
168 a generic protocol tower
169 */
epm_Map(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_Map * r)170 static error_status_t epm_Map(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
171 struct epm_Map *r)
172 {
173 uint32_t count;
174 int i;
175 struct dcesrv_ep_iface *eps;
176 struct epm_floor *floors;
177 enum dcerpc_transport_t transport;
178 struct dcerpc_syntax_id ndr_syntax;
179
180 count = build_ep_list(mem_ctx, dce_call->conn->dce_ctx->endpoint_list, &eps);
181
182 ZERO_STRUCT(*r->out.entry_handle);
183 r->out.num_towers = talloc(mem_ctx, uint32_t);
184 *r->out.num_towers = 1;
185 r->out.towers = talloc(mem_ctx, struct epm_twr_p_t);
186 if (!r->out.towers) {
187 return EPMAPPER_STATUS_NO_MEMORY;
188 }
189 r->out.towers->twr = talloc(mem_ctx, struct epm_twr_t);
190 if (!r->out.towers->twr) {
191 return EPMAPPER_STATUS_NO_MEMORY;
192 }
193
194 if (!r->in.map_tower || r->in.max_towers == 0 ||
195 r->in.map_tower->tower.num_floors < 3) {
196 goto failed;
197 }
198
199 floors = r->in.map_tower->tower.floors;
200
201 dcerpc_floor_get_lhs_data(&r->in.map_tower->tower.floors[1], &ndr_syntax);
202
203 if (floors[1].lhs.protocol != EPM_PROTOCOL_UUID ||
204 !GUID_equal(&ndr_syntax.uuid, &ndr_transfer_syntax.uuid) ||
205 ndr_syntax.if_version != ndr_transfer_syntax.if_version) {
206 goto failed;
207 }
208
209 transport = dcerpc_transport_by_tower(&r->in.map_tower->tower);
210
211 if (transport == -1) {
212 DEBUG(2, ("Client requested unknown transport with levels: "));
213 for (i = 2; i < r->in.map_tower->tower.num_floors; i++) {
214 DEBUG(2, ("%d, ", r->in.map_tower->tower.floors[i].lhs.protocol));
215 }
216 DEBUG(2, ("\n"));
217 goto failed;
218 }
219
220 for (i=0;i<count;i++) {
221 if (
222 !data_blob_equal(&r->in.map_tower->tower.floors[0].lhs.lhs_data,
223 &eps[i].ep.floors[0].lhs.lhs_data)
224 || transport != dcerpc_transport_by_tower(&eps[i].ep)) {
225 continue;
226 }
227
228 r->out.towers->twr->tower = eps[i].ep;
229 r->out.towers->twr->tower_length = 0;
230 return EPMAPPER_STATUS_OK;
231 }
232
233
234 failed:
235 *r->out.num_towers = 0;
236 r->out.towers->twr = NULL;
237
238 return EPMAPPER_STATUS_NO_MORE_ENTRIES;
239 }
240
epm_LookupHandleFree(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_LookupHandleFree * r)241 static error_status_t epm_LookupHandleFree(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
242 struct epm_LookupHandleFree *r)
243 {
244 DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
245 }
246
epm_InqObject(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_InqObject * r)247 static error_status_t epm_InqObject(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
248 struct epm_InqObject *r)
249 {
250 DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
251 }
252
epm_MgmtDelete(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_MgmtDelete * r)253 static error_status_t epm_MgmtDelete(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
254 struct epm_MgmtDelete *r)
255 {
256 DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
257 }
258
epm_MapAuth(struct dcesrv_call_state * dce_call,TALLOC_CTX * mem_ctx,struct epm_MapAuth * r)259 static error_status_t epm_MapAuth(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
260 struct epm_MapAuth *r)
261 {
262 DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
263 }
264
265 /* include the generated boilerplate */
266 #include "librpc/gen_ndr/ndr_epmapper_s.c"
267