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