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