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 #include "rpc_common.h"
  31
  32 #undef strcasecmp
  33 #undef strncasecmp
  34
  35 #define MAX_PROTSEQ             10
  36
  37 static const struct {
  38         const char *name;
  39         enum dcerpc_transport_t transport;
  40         int num_protocols;
  41         enum epm_protocol protseq[MAX_PROTSEQ];
  42 } transports[] = {
  43         { "ncacn_np",     NCACN_NP, 3,
  44                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }},
  45         { "ncacn_ip_tcp", NCACN_IP_TCP, 3,
  46                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } },
  47         { "ncacn_http", NCACN_HTTP, 3,
  48                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } },
  49         { "ncadg_ip_udp", NCACN_IP_UDP, 3,
  50                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } },
  51         { "ncalrpc", NCALRPC, 2,
  52                 { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_NAMED_PIPE } },
  53         { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2,
  54                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } },
  55         { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2,
  56                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } },
  57         { "ncacn_at_dsp", NCACN_AT_DSP, 3,
  58                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } },
  59         { "ncadg_at_ddp", NCADG_AT_DDP, 3,
  60                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } },
  61         { "ncacn_vns_ssp", NCACN_VNS_SPP, 3,
  62                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } },
  63         { "ncacn_vns_ipc", NCACN_VNS_IPC, 3,
  64                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, },
  65         { "ncadg_ipx", NCADG_IPX, 2,
  66                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX },
  67         },
  68         { "ncacn_spx", NCACN_SPX, 3,
  69                 /* I guess some MS programmer confused the identifier for
  70                  * EPM_PROTOCOL_UUID (0x0D or 13) with the one for
  71                  * EPM_PROTOCOL_SPX (0x13) here. -- jelmer*/
  72                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_UUID },
  73         },
  74 };
  75
  76 static const struct {
  77         const char *name;
  78         uint32_t flag;
  79 } ncacn_options[] = {
  80         {"sign", DCERPC_SIGN},
  81         {"seal", DCERPC_SEAL},
  82         {"connect", DCERPC_CONNECT},
  83         {"spnego", DCERPC_AUTH_SPNEGO},
  84         {"ntlm", DCERPC_AUTH_NTLM},
  85         {"krb5", DCERPC_AUTH_KRB5},
  86         {"validate", DCERPC_DEBUG_VALIDATE_BOTH},
  87         {"print", DCERPC_DEBUG_PRINT_BOTH},
  88         {"padcheck", DCERPC_DEBUG_PAD_CHECK},
  89         {"bigendian", DCERPC_PUSH_BIGENDIAN},
  90         {"smb2", DCERPC_SMB2},
  91         {"hdrsign", DCERPC_HEADER_SIGNING},
  92         {"ndr64", DCERPC_NDR64},
  93         {"localaddress", DCERPC_LOCALADDRESS}
  94 };
  95
  96 const char *epm_floor_string(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
  97 {
  98         struct ndr_syntax_id syntax;
  99         NTSTATUS status;
 100
 101         switch(epm_floor->lhs.protocol) {
 102                 case EPM_PROTOCOL_UUID:
 103                         status = dcerpc_floor_get_lhs_data(epm_floor, &syntax);
 104                         if (NT_STATUS_IS_OK(status)) {
 105                                 /* lhs is used: UUID */
 106                                 char *uuidstr;
 107
 108                                 if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax_ndr.uuid)) {
 109                                         return "NDR";
 110                                 }
 111
 112                                 if (GUID_equal(&syntax.uuid, &ndr_transfer_syntax_ndr64.uuid)) {
 113                                         return "NDR64";
 114                                 }
 115
 116                                 uuidstr = GUID_string(mem_ctx, &syntax.uuid);
 117
 118                                 return talloc_asprintf(mem_ctx, " uuid %s/0x%02x", uuidstr, syntax.if_version);
 119                         } else { /* IPX */
 120                                 return talloc_asprintf(mem_ctx, "IPX:%s",
 121                                                 data_blob_hex_string_upper(mem_ctx, &epm_floor->rhs.uuid.unknown));
 122                         }
 123
 124                 case EPM_PROTOCOL_NCACN:
 125                         return "RPC-C";
 126
 127                 case EPM_PROTOCOL_NCADG:
 128                         return "RPC";
 129
 130                 case EPM_PROTOCOL_NCALRPC:
 131                         return "NCALRPC";
 132
 133                 case EPM_PROTOCOL_DNET_NSP:
 134                         return "DNET/NSP";
 135
 136                 case EPM_PROTOCOL_IP:
 137                         return talloc_asprintf(mem_ctx, "IP:%s", epm_floor->rhs.ip.ipaddr);
 138
 139                 case EPM_PROTOCOL_NAMED_PIPE:
 140                         return talloc_asprintf(mem_ctx, "NAMED-PIPE:%s", epm_floor->rhs.named_pipe.path);
 141
 142                 case EPM_PROTOCOL_SMB:
 143                         return talloc_asprintf(mem_ctx, "SMB:%s", epm_floor->rhs.smb.unc);
 144
 145                 case EPM_PROTOCOL_UNIX_DS:
 146                         return talloc_asprintf(mem_ctx, "Unix:%s", epm_floor->rhs.unix_ds.path);
 147
 148                 case EPM_PROTOCOL_NETBIOS:
 149                         return talloc_asprintf(mem_ctx, "NetBIOS:%s", epm_floor->rhs.netbios.name);
 150
 151                 case EPM_PROTOCOL_NETBEUI:
 152                         return "NETBeui";
 153
 154                 case EPM_PROTOCOL_SPX:
 155                         return "SPX";
 156
 157                 case EPM_PROTOCOL_NB_IPX:
 158                         return "NB_IPX";
 159
 160                 case EPM_PROTOCOL_HTTP:
 161                         return talloc_asprintf(mem_ctx, "HTTP:%d", epm_floor->rhs.http.port);
 162
 163                 case EPM_PROTOCOL_TCP:
 164                         return talloc_asprintf(mem_ctx, "TCP:%d", epm_floor->rhs.tcp.port);
 165
 166                 case EPM_PROTOCOL_UDP:
 167                         return talloc_asprintf(mem_ctx, "UDP:%d", epm_floor->rhs.udp.port);
 168
 169                 default:
 170                         return talloc_asprintf(mem_ctx, "UNK(%02x):", epm_floor->lhs.protocol);
 171         }
 172 }
 173
 174
 175 /*
 176   form a binding string from a binding structure
 177 */
 178 _PUBLIC_ char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b)
 179 {
 180         char *s = talloc_strdup(mem_ctx, "");
 181         int i;
 182         const char *t_name = NULL;
 183
 184         if (b->transport != NCA_UNKNOWN) {
 185                 t_name = derpc_transport_string_by_transport(b->transport);
 186                 if (!t_name) {
 187                         return NULL;
 188                 }
 189         }
 190
 191         if (!GUID_all_zero(&b->object.uuid)) {
 192                 s = talloc_asprintf(s, "%s@",
 193                                     GUID_string(mem_ctx, &b->object.uuid));
 194         }
 195
 196         if (t_name != NULL) {
 197                 s = talloc_asprintf_append_buffer(s, "%s:", t_name);
 198                 if (s == NULL) {
 199                         return NULL;
 200                 }
 201         }
 202
 203         if (b->host) {
 204                 s = talloc_asprintf_append_buffer(s, "%s", b->host);
 205         }
 206
 207         if (!b->endpoint && !b->options && !b->flags) {
 208                 return s;
 209         }
 210
 211         s = talloc_asprintf_append_buffer(s, "[");
 212
 213         if (b->endpoint) {
 214                 s = talloc_asprintf_append_buffer(s, "%s", b->endpoint);
 215         }
 216
 217         /* this is a *really* inefficent way of dealing with strings,
 218            but this is rarely called and the strings are always short,
 219            so I don't care */
 220         for (i=0;b->options && b->options[i];i++) {
 221                 s = talloc_asprintf_append_buffer(s, ",%s", b->options[i]);
 222                 if (!s) return NULL;
 223         }
 224
 225         for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
 226                 if (b->flags & ncacn_options[i].flag) {
 227                         if (ncacn_options[i].flag == DCERPC_LOCALADDRESS && b->localaddress) {
 228                                 s = talloc_asprintf_append_buffer(s, ",%s=%s", ncacn_options[i].name,
 229                                                                   b->localaddress);
 230                         } else {
 231                                 s = talloc_asprintf_append_buffer(s, ",%s", ncacn_options[i].name);
 232                         }
 233                         if (!s) return NULL;
 234                 }
 235         }
 236
 237         s = talloc_asprintf_append_buffer(s, "]");
 238
 239         return s;
 240 }
 241
 242 /*
 243   parse a binding string into a dcerpc_binding structure
 244 */
 245 _PUBLIC_ NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
 246 {
 247         struct dcerpc_binding *b;
 248         char *options;
 249         char *p;
 250         int i, j, comma_count;
 251
 252         b = talloc_zero(mem_ctx, struct dcerpc_binding);
 253         if (!b) {
 254                 return NT_STATUS_NO_MEMORY;
 255         }
 256
 257         p = strchr(s, '@');
 258
 259         if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
 260                 NTSTATUS status;
 261                 DATA_BLOB blob = data_blob(s, 36);
 262                 status = GUID_from_data_blob(&blob, &b->object.uuid);
 263
 264                 if (NT_STATUS_IS_ERR(status)) {
 265                         DEBUG(0, ("Failed parsing UUID\n"));
 266                         return status;
 267                 }
 268
 269                 s = p + 1;
 270         } else {
 271                 ZERO_STRUCT(b->object);
 272         }
 273
 274         b->object.if_version = 0;
 275
 276         p = strchr(s, ':');
 277
 278         if (p == NULL) {
 279                 b->transport = NCA_UNKNOWN;
 280         } else {
 281                 char *type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 282                 if (!type) {
 283                         return NT_STATUS_NO_MEMORY;
 284                 }
 285
 286                 for (i=0;i<ARRAY_SIZE(transports);i++) {
 287                         if (strcasecmp(type, transports[i].name) == 0) {
 288                                 b->transport = transports[i].transport;
 289                                 break;
 290                         }
 291                 }
 292
 293                 if (i==ARRAY_SIZE(transports)) {
 294                         DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
 295                         return NT_STATUS_INVALID_PARAMETER;
 296                 }
 297
 298                 talloc_free(type);
 299
 300                 s = p+1;
 301         }
 302
 303         p = strchr(s, '[');
 304         if (p) {
 305                 b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
 306                 options = talloc_strdup(mem_ctx, p+1);
 307                 if (options[strlen(options)-1] != ']') {
 308                         return NT_STATUS_INVALID_PARAMETER;
 309                 }
 310                 options[strlen(options)-1] = 0;
 311         } else {
 312                 b->host = talloc_strdup(b, s);
 313                 options = NULL;
 314         }
 315         if (!b->host) {
 316                 return NT_STATUS_NO_MEMORY;
 317         }
 318
 319         b->target_hostname = b->host;
 320
 321         b->options = NULL;
 322         b->flags = 0;
 323         b->assoc_group_id = 0;
 324         b->endpoint = NULL;
 325         b->localaddress = NULL;
 326
 327         if (!options) {
 328                 *b_out = b;
 329                 return NT_STATUS_OK;
 330         }
 331
 332         comma_count = count_chars(options, ',');
 333
 334         b->options = talloc_array(b, const char *, comma_count+2);
 335         if (!b->options) {
 336                 return NT_STATUS_NO_MEMORY;
 337         }
 338
 339         for (i=0; (p = strchr(options, ',')); i++) {
 340                 b->options[i] = talloc_strndup(b, options, PTR_DIFF(p, options));
 341                 if (!b->options[i]) {
 342                         return NT_STATUS_NO_MEMORY;
 343                 }
 344                 options = p+1;
 345         }
 346         b->options[i] = options;
 347         b->options[i+1] = NULL;
 348
 349         /* some options are pre-parsed for convenience */
 350         for (i=0;b->options[i];i++) {
 351                 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
 352                         size_t opt_len = strlen(ncacn_options[j].name);
 353                         if (strncasecmp(ncacn_options[j].name, b->options[i], opt_len) == 0) {
 354                                 int k;
 355                                 char c = b->options[i][opt_len];
 356
 357                                 if (ncacn_options[j].flag == DCERPC_LOCALADDRESS && c == '=') {
 358                                         b->localaddress = talloc_strdup(b, &b->options[i][opt_len+1]);
 359                                 } else if (c != 0) {
 360                                         continue;
 361                                 }
 362
 363                                 b->flags |= ncacn_options[j].flag;
 364                                 for (k=i;b->options[k];k++) {
 365                                         b->options[k] = b->options[k+1];
 366                                 }
 367                                 i--;
 368                                 break;
 369                         }
 370                 }
 371         }
 372
 373         if (b->options[0]) {
 374                 /* Endpoint is first option */
 375                 b->endpoint = b->options[0];
 376                 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
 377
 378                 for (i=0;b->options[i];i++) {
 379                         b->options[i] = b->options[i+1];
 380                 }
 381         }
 382
 383         if (b->options[0] == NULL)
 384                 b->options = NULL;
 385
 386         *b_out = b;
 387         return NT_STATUS_OK;
 388 }
 389
 390 _PUBLIC_ NTSTATUS dcerpc_floor_get_lhs_data(const struct epm_floor *epm_floor,
 391                                             struct ndr_syntax_id *syntax)
 392 {
 393         TALLOC_CTX *mem_ctx = talloc_init("floor_get_lhs_data");
 394         struct ndr_pull *ndr;
 395         enum ndr_err_code ndr_err;
 396         uint16_t if_version=0;
 397
 398         ndr = ndr_pull_init_blob(&epm_floor->lhs.lhs_data, mem_ctx);
 399         if (ndr == NULL) {
 400                 talloc_free(mem_ctx);
 401                 return NT_STATUS_NO_MEMORY;
 402         }
 403         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 404
 405         ndr_err = ndr_pull_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 406         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 407                 talloc_free(mem_ctx);
 408                 return ndr_map_error2ntstatus(ndr_err);
 409         }
 410
 411         ndr_err = ndr_pull_uint16(ndr, NDR_SCALARS, &if_version);
 412         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 413                 talloc_free(mem_ctx);
 414                 return ndr_map_error2ntstatus(ndr_err);
 415         }
 416
 417         syntax->if_version = if_version;
 418
 419         talloc_free(mem_ctx);
 420
 421         return NT_STATUS_OK;
 422 }
 423
 424 static DATA_BLOB dcerpc_floor_pack_lhs_data(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax)
 425 {
 426         DATA_BLOB blob;
 427         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 428
 429         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 430
 431         ndr_push_GUID(ndr, NDR_SCALARS | NDR_BUFFERS, &syntax->uuid);
 432         ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version);
 433
 434         blob = ndr_push_blob(ndr);
 435         talloc_steal(mem_ctx, blob.data);
 436         talloc_free(ndr);
 437         return blob;
 438 }
 439
 440 static bool dcerpc_floor_pack_rhs_if_version_data(
 441         TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax,
 442         DATA_BLOB *pblob)
 443 {
 444         DATA_BLOB blob;
 445         struct ndr_push *ndr = ndr_push_init_ctx(mem_ctx);
 446         enum ndr_err_code ndr_err;
 447
 448         if (ndr == NULL) {
 449                 return false;
 450         }
 451
 452         ndr->flags |= LIBNDR_FLAG_NOALIGN;
 453
 454         ndr_err = ndr_push_uint16(ndr, NDR_SCALARS, syntax->if_version >> 16);
 455         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 456                 return false;
 457         }
 458
 459         blob = ndr_push_blob(ndr);
 460         talloc_steal(mem_ctx, blob.data);
 461         talloc_free(ndr);
 462         *pblob = blob;
 463         return true;
 464 }
 465
 466 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *epm_floor)
 467 {
 468         switch (epm_floor->lhs.protocol) {
 469         case EPM_PROTOCOL_TCP:
 470                 if (epm_floor->rhs.tcp.port == 0) return NULL;
 471                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.tcp.port);
 472
 473         case EPM_PROTOCOL_UDP:
 474                 if (epm_floor->rhs.udp.port == 0) return NULL;
 475                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.udp.port);
 476
 477         case EPM_PROTOCOL_HTTP:
 478                 if (epm_floor->rhs.http.port == 0) return NULL;
 479                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.http.port);
 480
 481         case EPM_PROTOCOL_IP:
 482                 return talloc_strdup(mem_ctx, epm_floor->rhs.ip.ipaddr);
 483
 484         case EPM_PROTOCOL_NCACN:
 485                 return NULL;
 486
 487         case EPM_PROTOCOL_NCADG:
 488                 return NULL;
 489
 490         case EPM_PROTOCOL_SMB:
 491                 if (strlen(epm_floor->rhs.smb.unc) == 0) return NULL;
 492                 return talloc_strdup(mem_ctx, epm_floor->rhs.smb.unc);
 493
 494         case EPM_PROTOCOL_NAMED_PIPE:
 495                 if (strlen(epm_floor->rhs.named_pipe.path) == 0) return NULL;
 496                 return talloc_strdup(mem_ctx, epm_floor->rhs.named_pipe.path);
 497
 498         case EPM_PROTOCOL_NETBIOS:
 499                 if (strlen(epm_floor->rhs.netbios.name) == 0) return NULL;
 500                 return talloc_strdup(mem_ctx, epm_floor->rhs.netbios.name);
 501
 502         case EPM_PROTOCOL_NCALRPC:
 503                 return NULL;
 504
 505         case EPM_PROTOCOL_VINES_SPP:
 506                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_spp.port);
 507
 508         case EPM_PROTOCOL_VINES_IPC:
 509                 return talloc_asprintf(mem_ctx, "%d", epm_floor->rhs.vines_ipc.port);
 510
 511         case EPM_PROTOCOL_STREETTALK:
 512                 return talloc_strdup(mem_ctx, epm_floor->rhs.streettalk.streettalk);
 513
 514         case EPM_PROTOCOL_UNIX_DS:
 515                 if (strlen(epm_floor->rhs.unix_ds.path) == 0) return NULL;
 516                 return talloc_strdup(mem_ctx, epm_floor->rhs.unix_ds.path);
 517
 518         case EPM_PROTOCOL_NULL:
 519                 return NULL;
 520
 521         default:
 522                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 523                 break;
 524         }
 525
 526         return NULL;
 527 }
 528
 529 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx,
 530                                           struct epm_floor *epm_floor,
 531                                           const char *data)
 532 {
 533         switch (epm_floor->lhs.protocol) {
 534         case EPM_PROTOCOL_TCP:
 535                 epm_floor->rhs.tcp.port = atoi(data);
 536                 return NT_STATUS_OK;
 537
 538         case EPM_PROTOCOL_UDP:
 539                 epm_floor->rhs.udp.port = atoi(data);
 540                 return NT_STATUS_OK;
 541
 542         case EPM_PROTOCOL_HTTP:
 543                 epm_floor->rhs.http.port = atoi(data);
 544                 return NT_STATUS_OK;
 545
 546         case EPM_PROTOCOL_IP:
 547                 epm_floor->rhs.ip.ipaddr = talloc_strdup(mem_ctx, data);
 548                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.ip.ipaddr);
 549                 return NT_STATUS_OK;
 550
 551         case EPM_PROTOCOL_NCACN:
 552                 epm_floor->rhs.ncacn.minor_version = 0;
 553                 return NT_STATUS_OK;
 554
 555         case EPM_PROTOCOL_NCADG:
 556                 epm_floor->rhs.ncadg.minor_version = 0;
 557                 return NT_STATUS_OK;
 558
 559         case EPM_PROTOCOL_SMB:
 560                 epm_floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
 561                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.smb.unc);
 562                 return NT_STATUS_OK;
 563
 564         case EPM_PROTOCOL_NAMED_PIPE:
 565                 epm_floor->rhs.named_pipe.path = talloc_strdup(mem_ctx, data);
 566                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.named_pipe.path);
 567                 return NT_STATUS_OK;
 568
 569         case EPM_PROTOCOL_NETBIOS:
 570                 epm_floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
 571                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.netbios.name);
 572                 return NT_STATUS_OK;
 573
 574         case EPM_PROTOCOL_NCALRPC:
 575                 return NT_STATUS_OK;
 576
 577         case EPM_PROTOCOL_VINES_SPP:
 578                 epm_floor->rhs.vines_spp.port = atoi(data);
 579                 return NT_STATUS_OK;
 580
 581         case EPM_PROTOCOL_VINES_IPC:
 582                 epm_floor->rhs.vines_ipc.port = atoi(data);
 583                 return NT_STATUS_OK;
 584
 585         case EPM_PROTOCOL_STREETTALK:
 586                 epm_floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
 587                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.streettalk.streettalk);
 588                 return NT_STATUS_OK;
 589
 590         case EPM_PROTOCOL_UNIX_DS:
 591                 epm_floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
 592                 NT_STATUS_HAVE_NO_MEMORY(epm_floor->rhs.unix_ds.path);
 593                 return NT_STATUS_OK;
 594
 595         case EPM_PROTOCOL_NULL:
 596                 return NT_STATUS_OK;
 597
 598         default:
 599                 DEBUG(0,("Unsupported lhs protocol %d\n", epm_floor->lhs.protocol));
 600                 break;
 601         }
 602
 603         return NT_STATUS_NOT_SUPPORTED;
 604 }
 605
 606 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
 607 {
 608         int i;
 609
 610         /* Find a transport that has 'prot' as 4th protocol */
 611         for (i=0;i<ARRAY_SIZE(transports);i++) {
 612                 if (transports[i].num_protocols >= 2 &&
 613                         transports[i].protseq[1] == prot) {
 614                         return transports[i].transport;
 615                 }
 616         }
 617
 618         /* Unknown transport */
 619         return (unsigned int)-1;
 620 }
 621
 622 _PUBLIC_ enum dcerpc_transport_t dcerpc_transport_by_tower(const struct epm_tower *tower)
 623 {
 624         int i;
 625
 626         /* Find a transport that matches this tower */
 627         for (i=0;i<ARRAY_SIZE(transports);i++) {
 628                 int j;
 629                 if (transports[i].num_protocols != tower->num_floors - 2) {
 630                         continue;
 631                 }
 632
 633                 for (j = 0; j < transports[i].num_protocols; j++) {
 634                         if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
 635                                 break;
 636                         }
 637                 }
 638
 639                 if (j == transports[i].num_protocols) {
 640                         return transports[i].transport;
 641                 }
 642         }
 643
 644         /* Unknown transport */
 645         return (unsigned int)-1;
 646 }
 647
 648 _PUBLIC_ const char *derpc_transport_string_by_transport(enum dcerpc_transport_t t)
 649 {
 650         int i;
 651
 652         for (i=0; i<ARRAY_SIZE(transports); i++) {
 653                 if (t == transports[i].transport) {
 654                         return transports[i].name;
 655                 }
 656         }
 657         return NULL;
 658 }
 659
 660 _PUBLIC_ NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx,
 661                                             struct epm_tower *tower,
 662                                             struct dcerpc_binding **b_out)
 663 {
 664         NTSTATUS status;
 665         struct dcerpc_binding *binding;
 666
 667         /*
 668          * A tower needs to have at least 4 floors to carry useful
 669          * information. Floor 3 is the transport identifier which defines
 670          * how many floors are required at least.
 671          */
 672         if (tower->num_floors < 4) {
 673                 return NT_STATUS_INVALID_PARAMETER;
 674         }
 675
 676         binding = talloc_zero(mem_ctx, struct dcerpc_binding);
 677         NT_STATUS_HAVE_NO_MEMORY(binding);
 678
 679         ZERO_STRUCT(binding->object);
 680         binding->options = NULL;
 681         binding->host = NULL;
 682         binding->target_hostname = NULL;
 683         binding->flags = 0;
 684         binding->assoc_group_id = 0;
 685
 686         binding->transport = dcerpc_transport_by_tower(tower);
 687
 688         if (binding->transport == (unsigned int)-1) {
 689                 return NT_STATUS_NOT_SUPPORTED;
 690         }
 691
 692         /* Set object uuid */
 693         status = dcerpc_floor_get_lhs_data(&tower->floors[0], &binding->object);
 694
 695         if (!NT_STATUS_IS_OK(status)) {
 696                 DEBUG(1, ("Error pulling object uuid and version: %s", nt_errstr(status)));
 697                 return status;
 698         }
 699
 700         /* Ignore floor 1, it contains the NDR version info */
 701
 702         binding->options = NULL;
 703
 704         /* Set endpoint */
 705         if (tower->num_floors >= 4) {
 706                 binding->endpoint = dcerpc_floor_get_rhs_data(binding, &tower->floors[3]);
 707         } else {
 708                 binding->endpoint = NULL;
 709         }
 710
 711         /* Set network address */
 712         if (tower->num_floors >= 5) {
 713                 binding->host = dcerpc_floor_get_rhs_data(binding, &tower->floors[4]);
 714                 NT_STATUS_HAVE_NO_MEMORY(binding->host);
 715                 binding->target_hostname = binding->host;
 716         }
 717         *b_out = binding;
 718         return NT_STATUS_OK;
 719 }
 720
 721 _PUBLIC_ struct dcerpc_binding *dcerpc_binding_dup(TALLOC_CTX *mem_ctx,
 722                                                    const struct dcerpc_binding *b)
 723 {
 724         struct dcerpc_binding *n;
 725         uint32_t count;
 726
 727         n = talloc_zero(mem_ctx, struct dcerpc_binding);
 728         if (n == NULL) {
 729                 return NULL;
 730         }
 731
 732         n->transport = b->transport;
 733         n->object = b->object;
 734         n->flags = b->flags;
 735         n->assoc_group_id = b->assoc_group_id;
 736
 737         if (b->host != NULL) {
 738                 n->host = talloc_strdup(n, b->host);
 739                 if (n->host == NULL) {
 740                         talloc_free(n);
 741                         return NULL;
 742                 }
 743         }
 744
 745         if (b->target_hostname != NULL) {
 746                 n->target_hostname = talloc_strdup(n, b->target_hostname);
 747                 if (n->target_hostname == NULL) {
 748                         talloc_free(n);
 749                         return NULL;
 750                 }
 751         }
 752
 753         if (b->target_principal != NULL) {
 754                 n->target_principal = talloc_strdup(n, b->target_principal);
 755                 if (n->target_principal == NULL) {
 756                         talloc_free(n);
 757                         return NULL;
 758                 }
 759         }
 760
 761         if (b->localaddress != NULL) {
 762                 n->localaddress = talloc_strdup(n, b->localaddress);
 763                 if (n->localaddress == NULL) {
 764                         talloc_free(n);
 765                         return NULL;
 766                 }
 767         }
 768
 769         if (b->endpoint != NULL) {
 770                 n->endpoint = talloc_strdup(n, b->endpoint);
 771                 if (n->endpoint == NULL) {
 772                         talloc_free(n);
 773                         return NULL;
 774                 }
 775         }
 776
 777         for (count = 0; b->options && b->options[count]; count++);
 778
 779         if (count > 0) {
 780                 uint32_t i;
 781
 782                 n->options = talloc_array(n, const char *, count + 1);
 783                 if (n->options == NULL) {
 784                         talloc_free(n);
 785                         return NULL;
 786                 }
 787
 788                 for (i = 0; i < count; i++) {
 789                         n->options[i] = talloc_strdup(n->options, b->options[i]);
 790                         if (n->options[i] == NULL) {
 791                                 talloc_free(n);
 792                                 return NULL;
 793                         }
 794                 }
 795                 n->options[count] = NULL;
 796         }
 797
 798         return n;
 799 }
 800
 801 _PUBLIC_ NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx,
 802                                              const struct dcerpc_binding *binding,
 803                                              struct epm_tower *tower)
 804 {
 805         const enum epm_protocol *protseq = NULL;
 806         int num_protocols = -1, i;
 807         NTSTATUS status;
 808
 809         /* Find transport */
 810         for (i=0;i<ARRAY_SIZE(transports);i++) {
 811                 if (transports[i].transport == binding->transport) {
 812                         protseq = transports[i].protseq;
 813                         num_protocols = transports[i].num_protocols;
 814                         break;
 815                 }
 816         }
 817
 818         if (num_protocols == -1) {
 819                 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
 820                 return NT_STATUS_UNSUCCESSFUL;
 821         }
 822
 823         tower->num_floors = 2 + num_protocols;
 824         tower->floors = talloc_array(mem_ctx, struct epm_floor, tower->num_floors);
 825
 826         /* Floor 0 */
 827         tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 828
 829         tower->floors[0].lhs.lhs_data = dcerpc_floor_pack_lhs_data(tower->floors, &binding->object);
 830
 831         if (!dcerpc_floor_pack_rhs_if_version_data(
 832                     tower->floors, &binding->object,
 833                     &tower->floors[0].rhs.uuid.unknown)) {
 834                 return NT_STATUS_NO_MEMORY;
 835         }
 836
 837         /* Floor 1 */
 838         tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 839
 840         tower->floors[1].lhs.lhs_data = dcerpc_floor_pack_lhs_data(tower->floors,
 841                                                                 &ndr_transfer_syntax_ndr);
 842
 843         tower->floors[1].rhs.uuid.unknown = data_blob_talloc_zero(tower->floors, 2);
 844
 845         /* Floor 2 to num_protocols */
 846         for (i = 0; i < num_protocols; i++) {
 847                 tower->floors[2 + i].lhs.protocol = protseq[i];
 848                 tower->floors[2 + i].lhs.lhs_data = data_blob_talloc(tower->floors, NULL, 0);
 849                 ZERO_STRUCT(tower->floors[2 + i].rhs);
 850                 dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[2 + i], "");
 851         }
 852
 853         /* The 4th floor contains the endpoint */
 854         if (num_protocols >= 2 && binding->endpoint) {
 855                 status = dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[3], binding->endpoint);
 856                 if (NT_STATUS_IS_ERR(status)) {
 857                         return status;
 858                 }
 859         }
 860
 861         /* The 5th contains the network address */
 862         if (num_protocols >= 3 && binding->host) {
 863                 if (is_ipaddress(binding->host) ||
 864                     (binding->host[0] == '\\' && binding->host[1] == '\\')) {
 865                         status = dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[4],
 866                                                            binding->host);
 867                 } else {
 868                         /* note that we don't attempt to resolve the
 869                            name here - when we get a hostname here we
 870                            are in the client code, and want to put in
 871                            a wildcard all-zeros IP for the server to
 872                            fill in */
 873                         status = dcerpc_floor_set_rhs_data(tower->floors, &tower->floors[4],
 874                                                            "0.0.0.0");
 875                 }
 876                 if (NT_STATUS_IS_ERR(status)) {
 877                         return status;
 878                 }
 879         }
 880
 881         return NT_STATUS_OK;
 882 }