librpc/rpc/binding.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dcerpc utility functions
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Jelmer Vernooij 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   9    Copyright (C) Rafal Szczesniak 2006
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "../../lib/util/util_net.h"
  27 #include "librpc/gen_ndr/ndr_epmapper.h"
  28 #include "librpc/gen_ndr/ndr_misc.h"
  29 #include "librpc/rpc/dcerpc.h"
  30 #undef strcasecmp
  31
  32 #define MAX_PROTSEQ             10
  33
  34 static const struct {
  35         const char *name;
  36         enum dcerpc_transport_t transport;
  37         int num_protocols;
  38         enum epm_protocol protseq[MAX_PROTSEQ];
  39 } transports[] = {
  40         { "ncacn_np",     NCACN_NP, 3,
  41                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }},
  42         { "ncacn_ip_tcp", NCACN_IP_TCP, 3,
  43                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } },
  44         { "ncacn_http", NCACN_HTTP, 3,
  45                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } },
  46         { "ncadg_ip_udp", NCACN_IP_UDP, 3,
  47                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } },
  48         { "ncalrpc", NCALRPC, 2,
  49                 { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_NAMED_PIPE } },
  50         { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2,
  51                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } },
  52         { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2,
  53                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } },
  54         { "ncacn_at_dsp", NCACN_AT_DSP, 3,
  55                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } },
  56         { "ncadg_at_ddp", NCADG_AT_DDP, 3,
  57                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } },
  58         { "ncacn_vns_ssp", NCACN_VNS_SPP, 3,
  59                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } },
  60         { "ncacn_vns_ipc", NCACN_VNS_IPC, 3,
  61                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, },
  62         { "ncadg_ipx", NCADG_IPX, 2,
  63                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX },
  64         },
  65         { "ncacn_spx", NCACN_SPX, 3,
  66                 /* I guess some MS programmer confused the identifier for
  67                  * EPM_PROTOCOL_UUID (0x0D or 13) with the one for
  68                  * EPM_PROTOCOL_SPX (0x13) here. -- jelmer*/
  69                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_UUID },
  70         },
  71 };
  72
  73 static const struct {
  74         const char *name;
  75         uint32_t flag;
  76 } ncacn_options[] = {
  77         {"sign", DCERPC_SIGN},
  78         {"seal", DCERPC_SEAL},
  79         {"connect", DCERPC_CONNECT},
  80         {"spnego", DCERPC_AUTH_SPNEGO},
  81         {"ntlm", DCERPC_AUTH_NTLM},
  82         {"krb5", DCERPC_AUTH_KRB5},
  83         {"validate", DCERPC_DEBUG_VALIDATE_BOTH},
  84         {"print", DCERPC_DEBUG_PRINT_BOTH},
  85         {"padcheck", DCERPC_DEBUG_PAD_CHECK},
  86         {"bigendian", DCERPC_PUSH_BIGENDIAN},
  87         {"smb2", DCERPC_SMB2},
  88         {"hdrsign", DCERPC_HEADER_SIGNING},
  89         {"ndr64", DCERPC_NDR64}
  90 };
  91
  92 const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
  93 {
  94         struct ndr_syntax_id syntax;
  95         NTSTATUS status;
  96
  97         switch(epm_floor->lhs.protocol) {
  98                 case EPM_PROTOCOL_UUID:
  99                         status = dcerpc_floor_get_lhs_data(epm_floor, &syntax);
 100                         if (NT_STATUS_IS_OK(status)) {
 101                                 /* lhs is used: UUID */
 102                                 char *uuidstr;
 103
 104                                 if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax.uuid)) {
 105                                         return "NDR";
 106                                 }
 107
 108                                 if (GUID_equal(&syntax.uuid, &ndr64_transfer_syntax.uuid)) {
 109                                         return "NDR64";
 110                                 }
 111
 112                                 uuidstr = GUID_string(mem_ctx, &syntax.uuid);
 113
 114                                 return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, syntax.if_version);
 115                         } else { /* IPX */
 116                                 return talloc_asprintf(mem_ctx, "IPX:%s",
 117                                                 data_blob_hex_string_upper(mem_ctx, &epm_floor->rhs.uuid.unknown));
 118                         }
 119
 120                 case EPM_PROTOCOL_NCACN:
 121                         return "RPC-C";
 122
 123                 case EPM_PROTOCOL_NCADG:
 124                         return "RPC";
 125
 126                 case EPM_PROTOCOL_NCALRPC:
 127                         return "NCALRPC";
 128
 129                 case EPM_PROTOCOL_DNET_NSP:
 130                         return "DNET/NSP";
 131
 132                 case EPM_PROTOCOL_IP:
 133                         return talloc_asprintf(mem_ctx, "IP:%s", epm_floor->rhs.ip.ipaddr);
 134
 135                 case EPM_PROTOCOL_NAMED_PIPE:
 136                         return talloc_asprintf(mem_ctx, "NAMED-PIPE:%s", epm_floor->rhs.named_pipe.path);
 137
 138                 case EPM_PROTOCOL_SMB:
 139                         return talloc_asprintf(mem_ctx, "SMB:%s", epm_floor->rhs.smb.unc);
 140
 141                 case EPM_PROTOCOL_UNIX_DS:
 142                         return talloc_asprintf(mem_ctx, "Unix:%s", epm_floor->rhs.unix_ds.path);
 143
 144                 case EPM_PROTOCOL_NETBIOS:
 145                         return talloc_asprintf(mem_ctx, "NetBIOS:%s", epm_floor->rhs.netbios.name);
 146
 147                 case EPM_PROTOCOL_NETBEUI:
 148                         return "NETBeui";
 149
 150                 case EPM_PROTOCOL_SPX:
 151                         return "SPX";
 152
 153                 case EPM_PROTOCOL_NB_IPX:
 154                         return "NB_IPX";
 155
 156                 case EPM_PROTOCOL_HTTP:
 157                         return talloc_asprintf(mem_ctx, "HTTP:%d", epm_floor->rhs.http.port);
 158
 159                 case EPM_PROTOCOL_TCP:
 160                         return talloc_asprintf(mem_ctx, "TCP:%d", epm_floor->rhs.tcp.port);
 161
 162                 case EPM_PROTOCOL_UDP:
 163                         return talloc_asprintf(mem_ctx, "UDP:%d", epm_floor->rhs.udp.port);
 164
 165                 default:
 166                         return talloc_asprintf(mem_ctx, "UNK(%02x):", epm_floor->lhs.protocol);
 167         }
 168 }
 169
 170
 171 /*
 172   form a binding string from a binding structure
 173 */
 174 _PUBLIC_ char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b)
 175 {
 176         char *s = talloc_strdup(mem_ctx, "");
 177         int i;
 178         const char *t_name = NULL;
 179
 180         if (b->transport != NCA_UNKNOWN) {
 181                 t_name = derpc_transport_string_by_transport(b->transport);
 182                 if (!t_name) {
 183                         return NULL;
 184                 }
 185         }
 186
 187         if (!GUID_all_zero(&b->object.uuid)) {
 188                 s = talloc_asprintf(s, "%s@",
 189                                     GUID_string(mem_ctx, &b->object.uuid));
 190         }
 191
 192         if (t_name != NULL) {
 193                 s = talloc_asprintf_append_buffer(s, "%s:", t_name);
 194                 if (s == NULL) {
 195                         return NULL;
 196                 }
 197         }
 198
 199         if (b->host) {
 200                 s = talloc_asprintf_append_buffer(s, "%s", b->host);
 201         }
 202
 203         if (!b->endpoint && !b->options && !b->flags) {
 204                 return s;
 205         }
 206
 207         s = talloc_asprintf_append_buffer(s, "[");
 208
 209         if (b->endpoint) {
 210                 s = talloc_asprintf_append_buffer(s, "%s", b->endpoint);
 211         }
 212
 213         /* this is a *really* inefficent way of dealing with strings,
 214            but this is rarely called and the strings are always short,
 215            so I don't care */
 216         for (i=0;b->options && b->options[i];i++) {
 217                 s = talloc_asprintf_append_buffer(s, ",%s", b->options[i]);
 218                 if (!s) return NULL;
 219         }
 220
 221         for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
 222                 if (b->flags & ncacn_options[i].flag) {
 223                         s = talloc_asprintf_append_buffer(s, ",%s", ncacn_options[i].name);
 224                         if (!s) return NULL;
 225                 }
 226         }
 227
 228         s = talloc_asprintf_append_buffer(s, "]");
 229
 230         return s;
 231 }
 232
 233 /*
 234   parse a binding string into a dcerpc_binding structure
 235 */
 236 _PUBLIC_ NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
 237 {
 238         struct dcerpc_binding *b;
 239         char *options;
 240         char *p;
 241         int i, j, comma_count;
 242
 243         b = talloc(mem_ctx, struct dcerpc_binding);
 244         if (!b) {
 245                 return NT_STATUS_NO_MEMORY;
 246         }
 247
 248         p = strchr(s, '@');
 249
 250         if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
 251                 NTSTATUS status;
 252                 DATA_BLOB blob = data_blob(s, 36);
 253                 status = GUID_from_data_blob(&blob, &b->object.uuid);
 254
 255                 if (NT_STATUS_IS_ERR(status)) {
 256                         DEBUG(0, ("Failed parsing UUID\n"));
 257                         return status;
 258                 }
 259
 260                 s = p + 1;
 261         } else {
 262                 ZERO_STRUCT(b->object);
 263         }
 264
 265         b->object.if_version = 0;
 266
 267         p = strchr(s, ':');
 268
 269         if (p == NULL) {
 270                 b->transport = NCA_UNKNOWN;
 271         } else {
 272                 char *type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 273                 if (!type) {
 274                         return NT_STATUS_NO_MEMORY;
 275                 }
 276
 277                 for (i=0;i<ARRAY_SIZE(transports);i++) {
 278                         if (strcasecmp(type, transports[i].name) == 0) {
 279                                 b->transport = transports[i].transport;
 280                                 break;
 281                         }
 282                 }
 283
 284                 if (i==ARRAY_SIZE(transports)) {
 285                         DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
 286                         return NT_STATUS_INVALID_PARAMETER;
 287                 }
 288
 289                 talloc_free(type);
 290
 291                 s = p+1;
 292         }
 293
 294         p = strchr(s, '[');
 295         if (p) {
 296                 b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
 297                 options = talloc_strdup(mem_ctx, p+1);
 298                 if (options[strlen(options)-1] != ']') {
 299                         return NT_STATUS_INVALID_PARAMETER;
 300                 }
 301                 options[strlen(options)-1] = 0;
 302         } else {
 303                 b->host = talloc_strdup(b, s);
 304                 options = NULL;
 305         }
 306         if (!b->host) {
 307                 return NT_STATUS_NO_MEMORY;
 308         }
 309
 310         b->target_hostname = b->host;
 311
 312         b->options = NULL;
 313         b->flags = 0;
 314         b->assoc_group_id = 0;
 315         b->endpoint = NULL;
 316
 317         if (!options) {
 318                 *b_out = b;
 319                 return NT_STATUS_OK;
 320         }
 321
 322         comma_count = count_chars(options, ',');
 323
 324         b->options = talloc_array(b, const char *, comma_count+2);
 325         if (!b->options) {
 326                 return NT_STATUS_NO_MEMORY;
 327         }
 328
 329         for (i=0; (p = strchr(options, ',')); i++) {
 330                 b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options));
 331                 if (!b->options[i]) {
 332                         return NT_STATUS_NO_MEMORY;
 333                 }
 334                 options = p+1;
 335         }
 336         b->options[i] = options;
 337         b->options[i+1] = NULL;
 338
 339         /* some options are pre-parsed for convenience */
 340         for (i=0;b->options[i];i++) {
 341                 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
 342                         if (strcasecmp(ncacn_options[j].name, b->options[i]) == 0) {
 343                                 int k;
 344                                 b->flags |= ncacn_options[j].flag;
 345                                 for (k=i;b->options[k];k++) {
 346                                         b->options[k] = b->options[k+1];
 347                                 }
 348                                 i--;
 349                                 break;
 350                         }
 351                 }
 352         }
 353
 354         if (b->options[0]) {
 355                 /* Endpoint is first option */
 356                 b->endpoint = b->options[0];
 357                 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
 358
 359                 for (i=0;b->options[i];i++) {
 360                         b->options[i] = b->options[i+1];
 361                 }
 362         }
 363
 364         if (b->options[0] == NULL)
 365                 b->options = NULL;
 366
 367         *b_out = b;
 368         return NT_STATUS_OK;
 369 }
 370
 371 _PUBLIC_ NTSTATUS dcerpc_floor_get_lhs_data(const struct epm_floor *epm_floor,
 372                                             struct ndr_syntax_id *syntax)
 373 {
 374         TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data");
 375         struct ndr_pull *ndr;
 376         enum ndr_err_code ndr_err;
 377         uint16_t if_version=0;
 378
 379         ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx);
 380         if (ndr == NULL) {
 381                 talloc_free(mem_ctx);
 382                 return NT_STATUS_NO_MEMORY;
 383         }
 384         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 385
 386         ndr_err = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 387         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 388                 talloc_free(mem_ctx);
 389                 return ndr_map_error2ntstatus(ndr_err);
 390         }
 391
 392         ndr_err = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version);
 393         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 394                 talloc_free(mem_ctx);
 395                 return ndr_map_error2ntstatus(ndr_err);
 396         }
 397
 398         syntax->if_version = if_version;
 399
 400         talloc_free(mem_ctx);
 401
 402         return NT_STATUS_OK;
 403 }
 404
 405 static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax)
 406 {
 407         DATA_BLOB blob;
 408         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 409
 410         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 411
 412         ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 413         ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version);
 414
 415         blob = ndr_push_blob(ndr);
 416         talloc_steal(mem_ctx, blob.data);
 417         talloc_free(ndr);
 418         return blob;
 419 }
 420
 421 static DATA_BLOB dcerpc_floor_pack_rhs_if_version_data(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax)
 422 {
 423         DATA_BLOB blob;
 424         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 425
 426         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 427
 428         ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version >> 16);
 429
 430         blob = ndr_push_blob(ndr);
 431         talloc_steal(mem_ctx, blob.data);
 432         talloc_free(ndr);
 433         return blob;
 434 }
 435
 436 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 437 {
 438         switch (epm_floor->lhs.protocol) {
 439         case EPM_PROTOCOL_TCP:
 440                 if (epm_floor->rhs.tcp.port == 0) return NULL;
 441                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port);
 442
 443         case EPM_PROTOCOL_UDP:
 444                 if (epm_floor->rhs.udp.port == 0) return NULL;
 445                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port);
 446
 447         case EPM_PROTOCOL_HTTP:
 448                 if (epm_floor->rhs.http.port == 0) return NULL;
 449                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port);
 450
 451         case EPM_PROTOCOL_IP:
 452                 return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr);
 453
 454         case EPM_PROTOCOL_NCACN:
 455                 return NULL;
 456
 457         case EPM_PROTOCOL_NCADG:
 458                 return NULL;
 459
 460         case EPM_PROTOCOL_SMB:
 461                 if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL;
 462                 return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc);
 463
 464         case EPM_PROTOCOL_NAMED_PIPE:
 465                 if (strlen(epm_floor->rhs.named_pipe.path) == 0) return NULL;
 466                 return talloc_strdup(mem_ctx, epm_floor->rhs.named_pipe.path);
 467
 468         case EPM_PROTOCOL_NETBIOS:
 469                 if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL;
 470                 return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name);
 471
 472         case EPM_PROTOCOL_NCALRPC:
 473                 return NULL;
 474
 475         case EPM_PROTOCOL_VINES_SPP:
 476                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port);
 477
 478         case EPM_PROTOCOL_VINES_IPC:
 479                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port);
 480
 481         case EPM_PROTOCOL_STREETTALK:
 482                 return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk);
 483
 484         case EPM_PROTOCOL_UNIX_DS:
 485                 if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL;
 486                 return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path);
 487
 488         case EPM_PROTOCOL_NULL:
 489                 return NULL;
 490
 491         default:
 492                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 493                 break;
 494         }
 495
 496         return NULL;
 497 }
 498
 499 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx,
 500                                           struct epm_floor *epm_floor,
 501                                           const char *data)
 502 {
 503         switch (epm_floor->lhs.protocol) {
 504         case EPM_PROTOCOL_TCP:
 505                 epm_floor->rhs.tcp.port = atoi(data);
 506                 return NT_STATUS_OK;
 507
 508         case EPM_PROTOCOL_UDP:
 509                 epm_floor->rhs.udp.port = atoi(data);
 510                 return NT_STATUS_OK;
 511
 512         case EPM_PROTOCOL_HTTP:
 513                 epm_floor->rhs.http.port = atoi(data);
 514                 return NT_STATUS_OK;
 515
 516         case EPM_PROTOCOL_IP:
 517                 epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data);
 518                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr);
 519                 return NT_STATUS_OK;
 520
 521         case EPM_PROTOCOL_NCACN:
 522                 epm_floor->rhs.ncacn.minor_version = 0;
 523                 return NT_STATUS_OK;
 524
 525         case EPM_PROTOCOL_NCADG:
 526                 epm_floor->rhs.ncadg.minor_version = 0;
 527                 return NT_STATUS_OK;
 528
 529         case EPM_PROTOCOL_SMB:
 530                 epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
 531                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc);
 532                 return NT_STATUS_OK;
 533
 534         case EPM_PROTOCOL_NAMED_PIPE:
 535                 epm_floor->rhs.named_pipe.path = talloc_strdup(mem_ctx, data);
 536                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.named_pipe.path);
 537                 return NT_STATUS_OK;
 538
 539         case EPM_PROTOCOL_NETBIOS:
 540                 epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
 541                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name);
 542                 return NT_STATUS_OK;
 543
 544         case EPM_PROTOCOL_NCALRPC:
 545                 return NT_STATUS_OK;
 546
 547         case EPM_PROTOCOL_VINES_SPP:
 548                 epm_floor->rhs.vines_spp.port = atoi(data);
 549                 return NT_STATUS_OK;
 550
 551         case EPM_PROTOCOL_VINES_IPC:
 552                 epm_floor->rhs.vines_ipc.port = atoi(data);
 553                 return NT_STATUS_OK;
 554
 555         case EPM_PROTOCOL_STREETTALK:
 556                 epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
 557                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk);
 558                 return NT_STATUS_OK;
 559
 560         case EPM_PROTOCOL_UNIX_DS:
 561                 epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
 562                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path);
 563                 return NT_STATUS_OK;
 564
 565         case EPM_PROTOCOL_NULL:
 566                 return NT_STATUS_OK;
 567
 568         default:
 569                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 570                 break;
 571         }
 572
 573         return NT_STATUS_NOT_SUPPORTED;
 574 }
 575
 576 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
 577 {
 578         int i;
 579
 580         /* Find a transport that has 'prot' as 4th protocol */
 581         for (i=0;i<ARRAY_SIZE(transports);i++) {
 582                 if (transports[i].num_protocols >= 2 &&
 583                         transports[i].protseq[1] == prot) {
 584                         return transports[i].transport;
 585                 }
 586         }
 587
 588         /* Unknown transport */
 589         return (unsigned int)-1;
 590 }
 591
 592 _PUBLIC_ enum dcerpc_transport_t dcerpc_transport_by_tower(const struct epm_tower *tower)
 593 {
 594         int i;
 595
 596         /* Find a transport that matches this tower */
 597         for (i=0;i<ARRAY_SIZE(transports);i++) {
 598                 int j;
 599                 if (transports[i].num_protocols != tower->num_floors - 2) {
 600                         continue;
 601                 }
 602
 603                 for (j = 0; j < transports[i].num_protocols; j++) {
 604                         if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
 605                                 break;
 606                         }
 607                 }
 608
 609                 if (j == transports[i].num_protocols) {
 610                         return transports[i].transport;
 611                 }
 612         }
 613
 614         /* Unknown transport */
 615         return (unsigned int)-1;
 616 }
 617
 618 _PUBLIC_ const char *derpc_transport_string_by_transport(enum dcerpc_transport_t t)
 619 {
 620         int i;
 621
 622         for (i=0; i<ARRAY_SIZE(transports); i++) {
 623                 if (t == transports[i].transport) {
 624                         return transports[i].name;
 625                 }
 626         }
 627         return NULL;
 628 }
 629
 630 _PUBLIC_ NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx,
 631                                    struct epm_tower *tower,
 632                                    struct dcerpc_binding **b_out)
 633 {
 634         NTSTATUS status;
 635         struct dcerpc_binding *binding;
 636
 637         binding = talloc(mem_ctx, struct dcerpc_binding);
 638         NT_STATUS_HAVE_NO_MEMORY(binding);
 639
 640         ZERO_STRUCT(binding->object);
 641         binding->options = NULL;
 642         binding->host = NULL;
 643         binding->target_hostname = NULL;
 644         binding->flags = 0;
 645         binding->assoc_group_id = 0;
 646
 647         binding->transport = dcerpc_transport_by_tower(tower);
 648
 649         if (binding->transport == (unsigned int)-1) {
 650                 return NT_STATUS_NOT_SUPPORTED;
 651         }
 652
 653         if (tower->num_floors < 1) {
 654                 return NT_STATUS_OK;
 655         }
 656
 657         /* Set object uuid */
 658         status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object);
 659
 660         if (!NT_STATUS_IS_OK(status)) {
 661                 DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status)));
 662                 return status;
 663         }
 664
 665         /* Ignore floor 1, it contains the NDR version info */
 666
 667         binding->options = NULL;
 668
 669         /* Set endpoint */
 670         if (tower->num_floors >= 4) {
 671                 binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]);
 672         } else {
 673                 binding->endpoint = NULL;
 674         }
 675
 676         /* Set network address */
 677         if (tower->num_floors >= 5) {
 678                 binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]);
 679                 NT_STATUS_HAVE_NO_MEMORY(binding->host);
 680                 binding->target_hostname = binding->host;
 681         }
 682         *b_out = binding;
 683         return NT_STATUS_OK;
 684 }
 685
 686 _PUBLIC_ NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx,
 687                                              const struct dcerpc_binding *binding,
 688                                              struct epm_tower *tower)
 689 {
 690         const enum epm_protocol *protseq = NULL;
 691         int num_protocols = -1, i;
 692         NTSTATUS status;
 693
 694         /* Find transport */
 695         for (i=0;i<ARRAY_SIZE(transports);i++) {
 696                 if (transports[i].transport == binding->transport) {
 697                         protseq = transports[i].protseq;
 698                         num_protocols = transports[i].num_protocols;
 699                         break;
 700                 }
 701         }
 702
 703         if (num_protocols == -1) {
 704                 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
 705                 return NT_STATUS_UNSUCCESSFUL;
 706         }
 707
 708         tower->num_floors = 2 + num_protocols;
 709         tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors);
 710
 711         /* Floor 0 */
 712         tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 713
 714         tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(tower->floors, &binding->object);
 715
 716         tower->floors[0].rhs.uuid.unknown = dcerpc_floor_pack_rhs_if_version_data(tower->floors, &binding->object);
 717
 718         /* Floor 1 */
 719         tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 720
 721         tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(tower->floors,
 722                                                                 &ndr_transfer_syntax);
 723
 724         tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(tower->floors, 2);
 725
 726         /* Floor 2 to num_protocols */
 727         for (i = 0; i < num_protocols; i++) {
 728                 tower->floors[2 + i].lhs.protocol = protseq[i];
 729                 tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(tower->floors, NULL, 0);
 730                 ZERO_STRUCT(tower->floors[2 + i].rhs);
 731                 dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[2 + i], "");
 732         }
 733
 734         /* The 4th floor contains the endpoint */
 735         if (num_protocols >= 2 && binding->endpoint) {
 736                 status = dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[3], binding->endpoint);
 737                 if (NT_STATUS_IS_ERR(status)) {
 738                         return status;
 739                 }
 740         }
 741
 742         /* The 5th contains the network address */
 743         if (num_protocols >= 3 && binding->host) {
 744                 if (is_ipaddress(binding->host)) {
 745                         status = dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[4],
 746                                                            binding->host);
 747                 } else {
 748                         /* note that we don't attempt to resolve the
 749                            name here - when we get a hostname here we
 750                            are in the client code, and want to put in
 751                            a wildcard all-zeros IP for the server to
 752                            fill in */
 753                         status = dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[4],
 754                                                            "0.0.0.0");
 755                 }
 756                 if (NT_STATUS_IS_ERR(status)) {
 757                         return status;
 758                 }
 759         }
 760
 761         return NT_STATUS_OK;
 762 }