source4/rpc_server/epmapper/rpc_epmapper.c

   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 dcerpc_binding ep_description;
  38 };
  39
  40 /*
  41   simple routine to compare a GUID string to a GUID structure
  42 */
  43 static int guid_cmp(TALLOC_CTX *mem_ctx, const struct GUID *guid, const char *uuid_str)
  44 {
  45         const char *s = GUID_string(mem_ctx, guid);
  46         if (!s || strcasecmp(s, uuid_str)) {
  47                 return -1;
  48         }
  49         return 0;
  50 }
  51
  52 /*
  53   build a list of all interfaces handled by all endpoint servers
  54 */
  55 static uint32_t build_ep_list(TALLOC_CTX *mem_ctx,
  56                               struct dcesrv_endpoint *endpoint_list,
  57                               struct dcesrv_ep_iface **eps)
  58 {
  59         struct dcesrv_endpoint *d;
  60         uint32_t total = 0;
  61
  62         *eps = NULL;
  63
  64         for (d=endpoint_list; d; d=d->next) {
  65                 struct dcesrv_if_list *iface;
  66
  67                 for (iface=d->interface_list;iface;iface=iface->next) {
  68                         (*eps) = talloc_realloc_p(mem_ctx,
  69                                                   *eps,
  70                                                   struct dcesrv_ep_iface,
  71                                                   total + 1);
  72                         if (!*eps) {
  73                                 return 0;
  74                         }
  75                         (*eps)[total].name = iface->iface.name;
  76                         (*eps)[total].ep_description = d->ep_description;
  77                         GUID_from_string(iface->iface.uuid, &(*eps)[total].ep_description.object);
  78                         (*eps)[total].ep_description.object_version = iface->iface.if_version;
  79                         total++;
  80                 }
  81         }
  82
  83         return total;
  84 }
  85
  86
  87 static error_status_t epm_Insert(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
  88                                  struct epm_Insert *r)
  89 {
  90         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
  91 }
  92
  93 static error_status_t epm_Delete(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
  94                                  struct epm_Delete *r)
  95 {
  96         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
  97 }
  98
  99
 100 /*
 101   implement epm_Lookup. This call is used to enumerate the interfaces
 102   available on a rpc server
 103 */
 104 static error_status_t epm_Lookup(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 105                                  struct epm_Lookup *r)
 106 {
 107         struct dcesrv_handle *h;
 108         struct rpc_eps {
 109                 uint32_t count;
 110                 struct dcesrv_ep_iface *e;
 111         } *eps;
 112         uint32_t num_ents;
 113         NTSTATUS status;
 114         int i;
 115
 116         h = dcesrv_handle_fetch(dce_call->conn, r->in.entry_handle, HTYPE_LOOKUP);
 117         DCESRV_CHECK_HANDLE(h);
 118
 119         eps = h->data;
 120
 121         if (!eps) {
 122                 /* this is the first call - fill the list. Subsequent calls
 123                    will feed from this list, stored in the handle */
 124                 eps = talloc_p(h, struct rpc_eps);
 125                 if (!eps) {
 126                         return EPMAPPER_STATUS_NO_MEMORY;
 127                 }
 128                 h->data = eps;
 129
 130                 eps->count = build_ep_list(h, dce_call->conn->dce_ctx->endpoint_list, &eps->e);
 131         }
 132
 133         /* return the next N elements */
 134         num_ents = r->in.max_ents;
 135         if (num_ents > eps->count) {
 136                 num_ents = eps->count;
 137         }
 138
 139         *r->out.entry_handle = h->wire_handle;
 140         r->out.num_ents = num_ents;
 141
 142         if (num_ents == 0) {
 143                 r->out.entries = NULL;
 144                 ZERO_STRUCTP(r->out.entry_handle);
 145                 dcesrv_handle_destroy(dce_call->conn, h);
 146                 return EPMAPPER_STATUS_NO_MORE_ENTRIES;
 147         }
 148
 149         r->out.entries = talloc_array_p(mem_ctx, struct epm_entry_t, num_ents);
 150         if (!r->out.entries) {
 151                 return EPMAPPER_STATUS_NO_MEMORY;
 152         }
 153
 154         for (i=0;i<num_ents;i++) {
 155                 ZERO_STRUCT(r->out.entries[i].object);
 156                 r->out.entries[i].annotation = eps->e[i].name;
 157                 r->out.entries[i].tower = talloc_p(mem_ctx, struct epm_twr_t);
 158                 if (!r->out.entries[i].tower) {
 159                         return EPMAPPER_STATUS_NO_MEMORY;
 160                 }
 161
 162                 status = dcerpc_binding_build_tower(mem_ctx, &eps->e[i].ep_description, &r->out.entries[i].tower->tower);
 163                 if (NT_STATUS_IS_ERR(status)) {
 164                         return EPMAPPER_STATUS_NO_MEMORY;
 165                 }
 166         }
 167
 168         eps->count -= num_ents;
 169         eps->e += num_ents;
 170
 171         return EPMAPPER_STATUS_OK;
 172 }
 173
 174
 175 /*
 176   implement epm_Map. This is used to find the specific endpoint to talk to given
 177   a generic protocol tower
 178 */
 179 static error_status_t epm_Map(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 180                               struct epm_Map *r)
 181 {
 182         uint32_t count;
 183         int i;
 184         struct dcesrv_ep_iface *eps;
 185         struct epm_floor *floors;
 186         enum dcerpc_transport_t transport;
 187         NTSTATUS status;
 188
 189         count = build_ep_list(mem_ctx, dce_call->conn->dce_ctx->endpoint_list, &eps);
 190
 191         ZERO_STRUCT(*r->out.entry_handle);
 192         r->out.num_towers = 1;
 193         r->out.towers = talloc_p(mem_ctx, struct epm_twr_p_t);
 194         if (!r->out.towers) {
 195                 return EPMAPPER_STATUS_NO_MEMORY;
 196         }
 197         r->out.towers->twr = talloc_p(mem_ctx, struct epm_twr_t);
 198         if (!r->out.towers->twr) {
 199                 return EPMAPPER_STATUS_NO_MEMORY;
 200         }
 201
 202         if (!r->in.map_tower || r->in.max_towers == 0 ||
 203             r->in.map_tower->tower.num_floors < 3) {
 204                 goto failed;
 205         }
 206
 207         floors = r->in.map_tower->tower.floors;
 208
 209         if (floors[0].lhs.protocol != EPM_PROTOCOL_UUID ||
 210             floors[1].lhs.protocol != EPM_PROTOCOL_UUID ||
 211             guid_cmp(mem_ctx, &floors[1].lhs.info.uuid.uuid, NDR_GUID) != 0 ||
 212             floors[1].lhs.info.uuid.version != NDR_GUID_VERSION) {
 213                 goto failed;
 214         }
 215
 216         transport = dcerpc_transport_by_tower(&r->in.map_tower->tower);
 217
 218         if (transport == -1) {
 219                 DEBUG(1, ("Client requested unknown transport with levels: "));
 220                 for (i = 2; i < r->in.map_tower->tower.num_floors; i++) {
 221                         DEBUG(1, ("%d, ", r->in.map_tower->tower.floors[i].lhs.protocol));
 222                 }
 223                 goto failed;
 224         }
 225
 226         for (i=0;i<count;i++) {
 227                 struct epm_tower t;
 228                 if (!GUID_equal(&floors[0].lhs.info.uuid.uuid, &eps[i].ep_description.object) ||
 229                     floors[0].lhs.info.uuid.version != eps[i].ep_description.object_version) {
 230                         continue;
 231                 }
 232
 233                 if (transport != eps[i].ep_description.transport) {
 234                         continue;
 235                 }
 236
 237                 status = dcerpc_binding_build_tower(mem_ctx,
 238                                                 &eps[i].ep_description,
 239                                                 &t);
 240
 241                 if (NT_STATUS_IS_ERR(status)) {
 242                         return EPMAPPER_STATUS_NO_MEMORY;
 243                 }
 244                 r->out.towers->twr->tower = t;
 245                 r->out.towers->twr->tower_length = 0;
 246                 return EPMAPPER_STATUS_OK;
 247         }
 248
 249
 250 failed:
 251         r->out.num_towers = 0;
 252         r->out.towers->twr = NULL;
 253
 254         return EPMAPPER_STATUS_NO_MORE_ENTRIES;
 255 }
 256
 257 static error_status_t epm_LookupHandleFree(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 258                                            struct epm_LookupHandleFree *r)
 259 {
 260         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 261 }
 262
 263 static error_status_t epm_InqObject(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 264                                     struct epm_InqObject *r)
 265 {
 266         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 267 }
 268
 269 static error_status_t epm_MgmtDelete(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 270                                struct epm_MgmtDelete *r)
 271 {
 272         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 273 }
 274
 275 static error_status_t epm_MapAuth(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 276                             struct epm_MapAuth *r)
 277 {
 278         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 279 }
 280
 281 /* include the generated boilerplate */
 282 #include "librpc/gen_ndr/ndr_epmapper_s.c"