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 epm_tower ep;
  38 };
  39
  40 /*
  41   build a list of all interfaces handled by all endpoint servers
  42 */
  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
  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
  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 */
 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 = num_ents;
 135
 136         if (num_ents == 0) {
 137                 r->out.entries = NULL;
 138                 ZERO_STRUCTP(r->out.entry_handle);
 139                 talloc_free(h);
 140                 return EPMAPPER_STATUS_NO_MORE_ENTRIES;
 141         }
 142
 143         r->out.entries = talloc_array(mem_ctx, struct epm_entry_t, num_ents);
 144         if (!r->out.entries) {
 145                 return EPMAPPER_STATUS_NO_MEMORY;
 146         }
 147
 148         for (i=0;i<num_ents;i++) {
 149                 ZERO_STRUCT(r->out.entries[i].object);
 150                 r->out.entries[i].annotation = eps->e[i].name;
 151                 r->out.entries[i].tower = talloc(mem_ctx, struct epm_twr_t);
 152                 if (!r->out.entries[i].tower) {
 153                         return EPMAPPER_STATUS_NO_MEMORY;
 154                 }
 155                 r->out.entries[i].tower->tower = eps->e[i].ep;
 156         }
 157
 158         eps->count -= num_ents;
 159         eps->e += num_ents;
 160
 161         return EPMAPPER_STATUS_OK;
 162 }
 163
 164
 165 /*
 166   implement epm_Map. This is used to find the specific endpoint to talk to given
 167   a generic protocol tower
 168 */
 169 static error_status_t epm_Map(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 170                               struct epm_Map *r)
 171 {
 172         uint32_t count;
 173         int i;
 174         struct dcesrv_ep_iface *eps;
 175         struct epm_floor *floors;
 176         enum dcerpc_transport_t transport;
 177         struct dcerpc_syntax_id ndr_syntax;
 178
 179         count = build_ep_list(mem_ctx, dce_call->conn->dce_ctx->endpoint_list, &eps);
 180
 181         ZERO_STRUCT(*r->out.entry_handle);
 182         r->out.num_towers = 1;
 183         r->out.towers = talloc(mem_ctx, struct epm_twr_p_t);
 184         if (!r->out.towers) {
 185                 return EPMAPPER_STATUS_NO_MEMORY;
 186         }
 187         r->out.towers->twr = talloc(mem_ctx, struct epm_twr_t);
 188         if (!r->out.towers->twr) {
 189                 return EPMAPPER_STATUS_NO_MEMORY;
 190         }
 191
 192         if (!r->in.map_tower || r->in.max_towers == 0 ||
 193             r->in.map_tower->tower.num_floors < 3) {
 194                 goto failed;
 195         }
 196
 197         floors = r->in.map_tower->tower.floors;
 198
 199         dcerpc_floor_get_lhs_data(&r->in.map_tower->tower.floors[1], &ndr_syntax);
 200
 201         if (floors[1].lhs.protocol != EPM_PROTOCOL_UUID ||
 202                 !GUID_equal(&ndr_syntax.uuid, &ndr_transfer_syntax.uuid) ||
 203             ndr_syntax.if_version != ndr_transfer_syntax.if_version) {
 204                 goto failed;
 205         }
 206
 207         transport = dcerpc_transport_by_tower(&r->in.map_tower->tower);
 208
 209         if (transport == -1) {
 210                 DEBUG(2, ("Client requested unknown transport with levels: "));
 211                 for (i = 2; i < r->in.map_tower->tower.num_floors; i++) {
 212                         DEBUG(2, ("%d, ", r->in.map_tower->tower.floors[i].lhs.protocol));
 213                 }
 214                 DEBUG(2, ("\n"));
 215                 goto failed;
 216         }
 217
 218         for (i=0;i<count;i++) {
 219                 if (
 220                         !data_blob_equal(&r->in.map_tower->tower.floors[0].lhs.lhs_data,
 221                         &eps[i].ep.floors[0].lhs.lhs_data)
 222                         || transport != dcerpc_transport_by_tower(&eps[i].ep)) {
 223                         continue;
 224                 }
 225
 226                 r->out.towers->twr->tower = eps[i].ep;
 227                 r->out.towers->twr->tower_length = 0;
 228                 return EPMAPPER_STATUS_OK;
 229         }
 230
 231
 232 failed:
 233         r->out.num_towers = 0;
 234         r->out.towers->twr = NULL;
 235
 236         return EPMAPPER_STATUS_NO_MORE_ENTRIES;
 237 }
 238
 239 static error_status_t epm_LookupHandleFree(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 240                                            struct epm_LookupHandleFree *r)
 241 {
 242         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 243 }
 244
 245 static error_status_t epm_InqObject(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 246                                     struct epm_InqObject *r)
 247 {
 248         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 249 }
 250
 251 static error_status_t epm_MgmtDelete(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 252                                struct epm_MgmtDelete *r)
 253 {
 254         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 255 }
 256
 257 static error_status_t epm_MapAuth(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 258                             struct epm_MapAuth *r)
 259 {
 260         DCESRV_FAULT(DCERPC_FAULT_OP_RNG_ERROR);
 261 }
 262
 263 /* include the generated boilerplate */
 264 #include "librpc/gen_ndr/ndr_epmapper_s.c"