source4/librpc/rpc/dcerpc_util.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
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25 #include "system/network.h"
  26 #include "librpc/gen_ndr/ndr_epmapper.h"
  27
  28 /*
  29   find the pipe name for a local IDL interface
  30 */
  31 const char *idl_pipe_name(const char *uuid, uint32_t if_version)
  32 {
  33         const struct dcerpc_interface_list *l;
  34         for (l=librpc_dcerpc_pipes();l;l=l->next) {
  35                 if (strcasecmp(l->table->uuid, uuid) == 0 &&
  36                     l->table->if_version == if_version) {
  37                         return l->table->name;
  38                 }
  39         }
  40         return "UNKNOWN";
  41 }
  42
  43 /*
  44   find the number of calls defined by local IDL
  45 */
  46 int idl_num_calls(const char *uuid, uint32_t if_version)
  47 {
  48         const struct dcerpc_interface_list *l;
  49         for (l=librpc_dcerpc_pipes();l;l=l->next){
  50                 if (strcasecmp(l->table->uuid, uuid) == 0 &&
  51                     l->table->if_version == if_version) {
  52                         return l->table->num_calls;
  53                 }
  54         }
  55         return -1;
  56 }
  57
  58
  59 /*
  60   find a dcerpc interface by name
  61 */
  62 const struct dcerpc_interface_table *idl_iface_by_name(const char *name)
  63 {
  64         const struct dcerpc_interface_list *l;
  65         for (l=librpc_dcerpc_pipes();l;l=l->next) {
  66                 if (strcasecmp(l->table->name, name) == 0) {
  67                         return l->table;
  68                 }
  69         }
  70         return NULL;
  71 }
  72
  73 /*
  74   find a dcerpc interface by uuid
  75 */
  76 const struct dcerpc_interface_table *idl_iface_by_uuid(const char *uuid)
  77 {
  78         const struct dcerpc_interface_list *l;
  79         for (l=librpc_dcerpc_pipes();l;l=l->next) {
  80                 if (strcasecmp(l->table->uuid, uuid) == 0) {
  81                         return l->table;
  82                 }
  83         }
  84         return NULL;
  85 }
  86
  87
  88 /*
  89    push a dcerpc_packet into a blob, potentially with auth info
  90 */
  91 NTSTATUS dcerpc_push_auth(DATA_BLOB *blob, TALLOC_CTX *mem_ctx,
  92                           struct dcerpc_packet *pkt,
  93                           struct dcerpc_auth *auth_info)
  94 {
  95         NTSTATUS status;
  96         struct ndr_push *ndr;
  97
  98         ndr = ndr_push_init_ctx(mem_ctx);
  99         if (!ndr) {
 100                 return NT_STATUS_NO_MEMORY;
 101         }
 102
 103         if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
 104                 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
 105         }
 106
 107         if (pkt->pfc_flags & DCERPC_PFC_FLAG_ORPC) {
 108                 ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT;
 109         }
 110
 111         if (auth_info) {
 112                 pkt->auth_length = auth_info->credentials.length;
 113         } else {
 114                 pkt->auth_length = 0;
 115         }
 116
 117         status = ndr_push_dcerpc_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
 118         if (!NT_STATUS_IS_OK(status)) {
 119                 return status;
 120         }
 121
 122         if (auth_info) {
 123                 status = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, auth_info);
 124         }
 125
 126         *blob = ndr_push_blob(ndr);
 127
 128         /* fill in the frag length */
 129         dcerpc_set_frag_length(blob, blob->length);
 130
 131         return NT_STATUS_OK;
 132 }
 133
 134 #define MAX_PROTSEQ             10
 135
 136 static const struct {
 137         const char *name;
 138         enum dcerpc_transport_t transport;
 139         int num_protocols;
 140         enum epm_protocol protseq[MAX_PROTSEQ];
 141 } transports[] = {
 142         { "ncacn_np",     NCACN_NP, 3,
 143                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB, EPM_PROTOCOL_NETBIOS }},
 144         { "ncacn_ip_tcp", NCACN_IP_TCP, 3,
 145                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP, EPM_PROTOCOL_IP } },
 146         { "ncacn_http", NCACN_HTTP, 3,
 147                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_HTTP, EPM_PROTOCOL_IP } },
 148         { "ncadg_ip_udp", NCACN_IP_UDP, 3,
 149                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UDP, EPM_PROTOCOL_IP } },
 150         { "ncalrpc", NCALRPC, 2,
 151                 { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE } },
 152         { "ncacn_unix_stream", NCACN_UNIX_STREAM, 2,
 153                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_UNIX_DS } },
 154         { "ncadg_unix_dgram", NCADG_UNIX_DGRAM, 2,
 155                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_UNIX_DS } },
 156         { "ncacn_at_dsp", NCACN_AT_DSP, 3,
 157                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DSP } },
 158         { "ncadg_at_ddp", NCADG_AT_DDP, 3,
 159                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_APPLETALK, EPM_PROTOCOL_DDP } },
 160         { "ncacn_vns_ssp", NCACN_VNS_SPP, 3,
 161                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_SPP } },
 162         { "ncacn_vns_ipc", NCACN_VNS_IPC, 3,
 163                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_STREETTALK, EPM_PROTOCOL_VINES_IPC }, },
 164         { "ncadg_ipx", NCADG_IPX, 2,
 165                 { EPM_PROTOCOL_NCADG, EPM_PROTOCOL_IPX },
 166         },
 167         { "ncacn_spx", NCACN_SPX, 2,
 168                 { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SPX },
 169         },
 170 };
 171
 172 static const struct {
 173         const char *name;
 174         uint32_t flag;
 175 } ncacn_options[] = {
 176         {"sign", DCERPC_SIGN},
 177         {"seal", DCERPC_SEAL},
 178         {"connect", DCERPC_CONNECT},
 179         {"validate", DCERPC_DEBUG_VALIDATE_BOTH},
 180         {"print", DCERPC_DEBUG_PRINT_BOTH},
 181         {"padcheck", DCERPC_DEBUG_PAD_CHECK},
 182         {"bigendian", DCERPC_PUSH_BIGENDIAN}
 183 };
 184
 185
 186
 187 /*
 188   form a binding string from a binding structure
 189 */
 190 const char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_binding *b)
 191 {
 192         char *s = talloc_strdup(mem_ctx, "");
 193         int i;
 194         const char *t_name=NULL;
 195
 196         for (i=0;i<ARRAY_SIZE(transports);i++) {
 197                 if (transports[i].transport == b->transport) {
 198                         t_name = transports[i].name;
 199                 }
 200         }
 201         if (!t_name) {
 202                 return NULL;
 203         }
 204
 205         if (!GUID_all_zero(&b->object)) {
 206                 s = talloc_asprintf(s, "%s@",
 207                                     GUID_string(mem_ctx, &b->object));
 208         }
 209
 210         s = talloc_asprintf_append(s, "%s:", t_name);
 211         if (!s) return NULL;
 212
 213         if (b->host) {
 214                 s = talloc_asprintf_append(s, "%s", b->host);
 215         }
 216
 217         if (!b->endpoint && !b->options && !b->flags) {
 218                 return s;
 219         }
 220
 221         s = talloc_asprintf_append(s, "[");
 222
 223         if (b->endpoint) {
 224                 s = talloc_asprintf_append(s, "%s", b->endpoint);
 225         }
 226
 227         /* this is a *really* inefficent way of dealing with strings,
 228            but this is rarely called and the strings are always short,
 229            so I don't care */
 230         for (i=0;b->options && b->options[i];i++) {
 231                 s = talloc_asprintf_append(s, ",%s", b->options[i]);
 232                 if (!s) return NULL;
 233         }
 234
 235         for (i=0;i<ARRAY_SIZE(ncacn_options);i++) {
 236                 if (b->flags & ncacn_options[i].flag) {
 237                         s = talloc_asprintf_append(s, ",%s", ncacn_options[i].name);
 238                         if (!s) return NULL;
 239                 }
 240         }
 241
 242         s = talloc_asprintf_append(s, "]");
 243
 244         return s;
 245 }
 246
 247 /*
 248   parse a binding string into a dcerpc_binding structure
 249 */
 250 NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding *b)
 251 {
 252         char *options, *type;
 253         char *p;
 254         int i, j, comma_count;
 255
 256         p = strchr(s, '@');
 257
 258         if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
 259                 NTSTATUS status;
 260
 261                 status = GUID_from_string(s, &b->object);
 262
 263                 if (NT_STATUS_IS_ERR(status)) {
 264                         DEBUG(0, ("Failed parsing UUID\n"));
 265                         return status;
 266                 }
 267
 268                 s = p + 1;
 269         } else {
 270                 ZERO_STRUCT(b->object);
 271         }
 272
 273         b->object_version = 0;
 274
 275         p = strchr(s, ':');
 276         if (!p) {
 277                 return NT_STATUS_INVALID_PARAMETER;
 278         }
 279
 280         type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 281         if (!type) {
 282                 return NT_STATUS_NO_MEMORY;
 283         }
 284
 285         for (i=0;i<ARRAY_SIZE(transports);i++) {
 286                 if (strcasecmp(type, transports[i].name) == 0) {
 287                         b->transport = transports[i].transport;
 288                         break;
 289                 }
 290         }
 291         if (i==ARRAY_SIZE(transports)) {
 292                 DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
 293                 return NT_STATUS_INVALID_PARAMETER;
 294         }
 295
 296         s = p+1;
 297
 298         p = strchr(s, '[');
 299         if (p) {
 300                 b->host = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
 301                 options = talloc_strdup(mem_ctx, p+1);
 302                 if (options[strlen(options)-1] != ']') {
 303                         return NT_STATUS_INVALID_PARAMETER;
 304                 }
 305                 options[strlen(options)-1] = 0;
 306         } else {
 307                 b->host = talloc_strdup(mem_ctx, s);
 308                 options = NULL;
 309         }
 310
 311         if (!b->host) {
 312                 return NT_STATUS_NO_MEMORY;
 313         }
 314
 315         b->options = NULL;
 316         b->flags = 0;
 317         b->endpoint = NULL;
 318
 319         if (!options) {
 320                 return NT_STATUS_OK;
 321         }
 322
 323         comma_count = count_chars(options, ',');
 324
 325         b->options = talloc_array_p(mem_ctx, const char *, comma_count+2);
 326         if (!b->options) {
 327                 return NT_STATUS_NO_MEMORY;
 328         }
 329
 330         for (i=0; (p = strchr(options, ',')); i++) {
 331                 b->options[i] = talloc_strndup(mem_ctx, options, PTR_DIFF(p, options));
 332                 if (!b->options[i]) {
 333                         return NT_STATUS_NO_MEMORY;
 334                 }
 335                 options = p+1;
 336         }
 337         b->options[i] = options;
 338         b->options[i+1] = NULL;
 339
 340         /* some options are pre-parsed for convenience */
 341         for (i=0;b->options[i];i++) {
 342                 for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
 343                         if (strcasecmp(ncacn_options[j].name, b->options[i]) == 0) {
 344                                 int k;
 345                                 b->flags |= ncacn_options[j].flag;
 346                                 for (k=i;b->options[k];k++) {
 347                                         b->options[k] = b->options[k+1];
 348                                 }
 349                                 i--;
 350                                 break;
 351                         }
 352                 }
 353         }
 354
 355         if (b->options[0]) {
 356                 /* Endpoint is first option */
 357                 b->endpoint = b->options[0];
 358                 if (strlen(b->endpoint) == 0) b->endpoint = NULL;
 359
 360                 for (i=0;b->options[i];i++) {
 361                         b->options[i] = b->options[i+1];
 362                 }
 363         }
 364
 365         if (b->options[0] == NULL)
 366                 b->options = NULL;
 367
 368         return NT_STATUS_OK;
 369 }
 370
 371 const char *dcerpc_floor_get_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *floor)
 372 {
 373         switch (floor->lhs.protocol) {
 374         case EPM_PROTOCOL_TCP:
 375                 if (floor->rhs.tcp.port == 0) return NULL;
 376                 return talloc_asprintf(mem_ctx, "%d", floor->rhs.tcp.port);
 377
 378         case EPM_PROTOCOL_UDP:
 379                 if (floor->rhs.udp.port == 0) return NULL;
 380                 return talloc_asprintf(mem_ctx, "%d", floor->rhs.udp.port);
 381
 382         case EPM_PROTOCOL_HTTP:
 383                 if (floor->rhs.http.port == 0) return NULL;
 384                 return talloc_asprintf(mem_ctx, "%d", floor->rhs.http.port);
 385
 386         case EPM_PROTOCOL_IP:
 387                 if (floor->rhs.ip.address == 0) {
 388                         return NULL;
 389                 }
 390
 391                 {
 392                         struct ipv4_addr in;
 393                         in.addr = htonl(floor->rhs.ip.address);
 394                         return talloc_strdup(mem_ctx, sys_inet_ntoa(in));
 395                 }
 396
 397         case EPM_PROTOCOL_NCACN:
 398                 return NULL;
 399
 400         case EPM_PROTOCOL_NCADG:
 401                 return NULL;
 402
 403         case EPM_PROTOCOL_SMB:
 404                 if (strlen(floor->rhs.smb.unc) == 0) return NULL;
 405                 return talloc_strdup(mem_ctx, floor->rhs.smb.unc);
 406
 407         case EPM_PROTOCOL_PIPE:
 408                 if (strlen(floor->rhs.pipe.path) == 0) return NULL;
 409                 return talloc_strdup(mem_ctx, floor->rhs.pipe.path);
 410
 411         case EPM_PROTOCOL_NETBIOS:
 412                 if (strlen(floor->rhs.netbios.name) == 0) return NULL;
 413                 return talloc_strdup(mem_ctx, floor->rhs.netbios.name);
 414
 415         case EPM_PROTOCOL_NCALRPC:
 416                 return NULL;
 417
 418         case EPM_PROTOCOL_VINES_SPP:
 419                 return talloc_asprintf(mem_ctx, "%d", floor->rhs.vines_spp.port);
 420
 421         case EPM_PROTOCOL_VINES_IPC:
 422                 return talloc_asprintf(mem_ctx, "%d", floor->rhs.vines_ipc.port);
 423
 424         case EPM_PROTOCOL_STREETTALK:
 425                 return talloc_strdup(mem_ctx, floor->rhs.streettalk.streettalk);
 426
 427         case EPM_PROTOCOL_UNIX_DS:
 428                 if (strlen(floor->rhs.unix_ds.path) == 0) return NULL;
 429                 return talloc_strdup(mem_ctx, floor->rhs.unix_ds.path);
 430
 431         case EPM_PROTOCOL_NULL:
 432                 return NULL;
 433
 434         default:
 435                 DEBUG(0,("Unsupported lhs protocol %d\n", floor->lhs.protocol));
 436                 break;
 437         }
 438
 439         return NULL;
 440 }
 441
 442 static NTSTATUS dcerpc_floor_set_rhs_data(TALLOC_CTX *mem_ctx, struct epm_floor *floor,  const char *data)
 443 {
 444         switch (floor->lhs.protocol) {
 445         case EPM_PROTOCOL_TCP:
 446                 floor->rhs.tcp.port = atoi(data);
 447                 return NT_STATUS_OK;
 448
 449         case EPM_PROTOCOL_UDP:
 450                 floor->rhs.udp.port = atoi(data);
 451                 return NT_STATUS_OK;
 452
 453         case EPM_PROTOCOL_HTTP:
 454                 floor->rhs.http.port = atoi(data);
 455                 return NT_STATUS_OK;
 456
 457         case EPM_PROTOCOL_IP:
 458                 if (strlen(data) > 0) {
 459                         floor->rhs.ip.address = ntohl(interpret_addr(data));
 460                 } else {
 461                         floor->rhs.ip.address = 0;
 462                 }
 463                 return NT_STATUS_OK;
 464
 465         case EPM_PROTOCOL_NCACN:
 466                 floor->rhs.ncacn.minor_version = 0;
 467                 return NT_STATUS_OK;
 468
 469         case EPM_PROTOCOL_NCADG:
 470                 floor->rhs.ncadg.minor_version = 0;
 471                 return NT_STATUS_OK;
 472
 473         case EPM_PROTOCOL_SMB:
 474                 floor->rhs.smb.unc = talloc_strdup(mem_ctx, data);
 475                 if (!floor->rhs.smb.unc) {
 476                         return NT_STATUS_NO_MEMORY;
 477                 }
 478                 return NT_STATUS_OK;
 479
 480         case EPM_PROTOCOL_PIPE:
 481                 floor->rhs.pipe.path = talloc_strdup(mem_ctx, data);
 482                 if (!floor->rhs.pipe.path) {
 483                         return NT_STATUS_NO_MEMORY;
 484                 }
 485                 return NT_STATUS_OK;
 486
 487         case EPM_PROTOCOL_NETBIOS:
 488                 floor->rhs.netbios.name = talloc_strdup(mem_ctx, data);
 489                 if (!floor->rhs.netbios.name) {
 490                         return NT_STATUS_NO_MEMORY;
 491                 }
 492                 return NT_STATUS_OK;
 493
 494         case EPM_PROTOCOL_NCALRPC:
 495                 return NT_STATUS_OK;
 496
 497         case EPM_PROTOCOL_VINES_SPP:
 498                 floor->rhs.vines_spp.port = atoi(data);
 499                 return NT_STATUS_OK;
 500
 501         case EPM_PROTOCOL_VINES_IPC:
 502                 floor->rhs.vines_ipc.port = atoi(data);
 503                 return NT_STATUS_OK;
 504
 505         case EPM_PROTOCOL_STREETTALK:
 506                 floor->rhs.streettalk.streettalk = talloc_strdup(mem_ctx, data);
 507                 if (!floor->rhs.streettalk.streettalk) {
 508                         return NT_STATUS_NO_MEMORY;
 509                 }
 510                 return NT_STATUS_OK;
 511
 512         case EPM_PROTOCOL_UNIX_DS:
 513                 floor->rhs.unix_ds.path = talloc_strdup(mem_ctx, data);
 514                 if (!floor->rhs.unix_ds.path) {
 515                         return NT_STATUS_NO_MEMORY;
 516                 }
 517                 return NT_STATUS_OK;
 518
 519         case EPM_PROTOCOL_NULL:
 520                 return NT_STATUS_OK;
 521
 522         default:
 523                 DEBUG(0,("Unsupported lhs protocol %d\n", floor->lhs.protocol));
 524                 break;
 525         }
 526
 527         return NT_STATUS_NOT_SUPPORTED;
 528 }
 529
 530 enum dcerpc_transport_t dcerpc_transport_by_endpoint_protocol(int prot)
 531 {
 532         int i;
 533
 534         /* Find a transport that has 'prot' as 4th protocol */
 535         for (i=0;i<ARRAY_SIZE(transports);i++) {
 536                 if (transports[i].num_protocols >= 2 &&
 537                         transports[i].protseq[1] == prot) {
 538                         return transports[i].transport;
 539                 }
 540         }
 541
 542         /* Unknown transport */
 543         return -1;
 544 }
 545
 546 enum dcerpc_transport_t dcerpc_transport_by_tower(struct epm_tower *tower)
 547 {
 548         int i;
 549
 550         /* Find a transport that matches this tower */
 551         for (i=0;i<ARRAY_SIZE(transports);i++) {
 552                 int j;
 553                 if (transports[i].num_protocols != tower->num_floors - 2) {
 554                         continue;
 555                 }
 556
 557                 for (j = 0; j < transports[i].num_protocols; j++) {
 558                         if (transports[i].protseq[j] != tower->floors[j+2].lhs.protocol) {
 559                                 break;
 560                         }
 561                 }
 562
 563                 if (j == transports[i].num_protocols) {
 564                         return transports[i].transport;
 565                 }
 566         }
 567
 568         /* Unknown transport */
 569         return -1;
 570 }
 571
 572 NTSTATUS dcerpc_binding_from_tower(TALLOC_CTX *mem_ctx, struct epm_tower *tower, struct dcerpc_binding *binding)
 573 {
 574         ZERO_STRUCT(binding->object);
 575         binding->options = NULL;
 576         binding->host = NULL;
 577         binding->flags = 0;
 578
 579         binding->transport = dcerpc_transport_by_tower(tower);
 580
 581         if (binding->transport == -1) {
 582                 return NT_STATUS_NOT_SUPPORTED;
 583         }
 584
 585         if (tower->num_floors < 1) {
 586                 return NT_STATUS_OK;
 587         }
 588
 589         /* Set object uuid */
 590         binding->object = tower->floors[0].lhs.info.uuid.uuid;
 591         binding->object_version = tower->floors[0].lhs.info.uuid.version;
 592
 593         /* Ignore floor 1, it contains the NDR version info */
 594
 595         binding->options = NULL;
 596
 597         /* Set endpoint */
 598         if (tower->num_floors >= 4) {
 599                 binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[3]);
 600         } else {
 601                 binding->endpoint = NULL;
 602         }
 603
 604         /* Set network address */
 605         if (tower->num_floors >= 5) {
 606                 binding->host = dcerpc_floor_get_rhs_data(mem_ctx, &tower->floors[4]);
 607         }
 608         return NT_STATUS_OK;
 609 }
 610
 611 NTSTATUS dcerpc_binding_build_tower(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding, struct epm_tower *tower)
 612 {
 613         const enum epm_protocol *protseq = NULL;
 614         int num_protocols = -1, i;
 615         NTSTATUS status;
 616
 617         /* Find transport */
 618         for (i=0;i<ARRAY_SIZE(transports);i++) {
 619                 if (transports[i].transport == binding->transport) {
 620                         protseq = transports[i].protseq;
 621                         num_protocols = transports[i].num_protocols;
 622                         break;
 623                 }
 624         }
 625
 626         if (num_protocols == -1) {
 627                 DEBUG(0, ("Unable to find transport with id '%d'\n", binding->transport));
 628                 return NT_STATUS_UNSUCCESSFUL;
 629         }
 630
 631         tower->num_floors = 2 + num_protocols;
 632         tower->floors = talloc_array_p(mem_ctx, struct epm_floor, tower->num_floors);
 633
 634         /* Floor 0 */
 635         tower->floors[0].lhs.protocol = EPM_PROTOCOL_UUID;
 636         tower->floors[0].lhs.info.uuid.uuid = binding->object;
 637         tower->floors[0].lhs.info.uuid.version = binding->object_version;
 638         tower->floors[0].rhs.uuid.unknown = 0;
 639
 640         /* Floor 1 */
 641         tower->floors[1].lhs.protocol = EPM_PROTOCOL_UUID;
 642         tower->floors[1].lhs.info.uuid.version = NDR_GUID_VERSION;
 643         tower->floors[1].rhs.uuid.unknown = 0;
 644         status = GUID_from_string(NDR_GUID, &tower->floors[1].lhs.info.uuid.uuid);
 645         if (NT_STATUS_IS_ERR(status)) {
 646                 return status;
 647         }
 648
 649         /* Floor 2 to num_protocols */
 650         for (i = 0; i < num_protocols; i++) {
 651                 tower->floors[2 + i].lhs.protocol = protseq[i];
 652                 tower->floors[2 + i].lhs.info.lhs_data = data_blob_talloc(mem_ctx, NULL, 0);
 653                 ZERO_STRUCT(tower->floors[2 + i].rhs);
 654                 dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[2 + i], "");
 655         }
 656
 657         /* The 4th floor contains the endpoint */
 658         if (num_protocols >= 2 && binding->endpoint) {
 659                 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[3], binding->endpoint);
 660                 if (NT_STATUS_IS_ERR(status)) {
 661                         return status;
 662                 }
 663         }
 664
 665         /* The 5th contains the network address */
 666         if (num_protocols >= 3 && binding->host) {
 667                 status = dcerpc_floor_set_rhs_data(mem_ctx, &tower->floors[4], binding->host);
 668                 if (NT_STATUS_IS_ERR(status)) {
 669                         return status;
 670                 }
 671         }
 672
 673         return NT_STATUS_OK;
 674 }
 675
 676 NTSTATUS dcerpc_epm_map_binding(TALLOC_CTX *mem_ctx, struct dcerpc_binding *binding,
 677                                  const char *uuid, uint_t version)
 678 {
 679         struct dcerpc_pipe *p;
 680         NTSTATUS status;
 681         struct epm_Map r;
 682         struct policy_handle handle;
 683         struct GUID guid;
 684         struct epm_twr_t twr, *twr_r;
 685         struct dcerpc_binding epmapper_binding;
 686         const struct dcerpc_interface_table *table = idl_iface_by_uuid(uuid);
 687         int i;
 688
 689         /* First, check if there is a default endpoint specified in the IDL */
 690
 691         if (table) {
 692                 struct dcerpc_binding default_binding;
 693
 694                 /* Find one of the default pipes for this interface */
 695                 for (i = 0; i < table->endpoints->count; i++) {
 696                         status = dcerpc_parse_binding(mem_ctx, table->endpoints->names[i], &default_binding);
 697
 698                         if (NT_STATUS_IS_OK(status) && default_binding.transport == binding->transport && default_binding.endpoint) {
 699                                 binding->endpoint = talloc_strdup(mem_ctx, default_binding.endpoint);
 700                                 return NT_STATUS_OK;
 701                         }
 702                 }
 703         }
 704
 705
 706         ZERO_STRUCT(epmapper_binding);
 707         epmapper_binding.transport = binding->transport;
 708         epmapper_binding.host = binding->host;
 709         epmapper_binding.options = NULL;
 710         epmapper_binding.flags = 0;
 711         epmapper_binding.endpoint = NULL;
 712
 713         status = dcerpc_pipe_connect_b(&p,
 714                                         &epmapper_binding,
 715                                    DCERPC_EPMAPPER_UUID,
 716                                    DCERPC_EPMAPPER_VERSION,
 717                                    NULL, NULL, NULL);
 718
 719         if (!NT_STATUS_IS_OK(status)) {
 720                 return status;
 721         }
 722
 723         ZERO_STRUCT(handle);
 724         ZERO_STRUCT(guid);
 725
 726         status = GUID_from_string(uuid, &binding->object);
 727         if (NT_STATUS_IS_ERR(status)) {
 728                 return status;
 729         }
 730
 731         binding->object_version = version;
 732
 733         status = dcerpc_binding_build_tower(p, binding, &twr.tower);
 734         if (NT_STATUS_IS_ERR(status)) {
 735                 return status;
 736         }
 737
 738         /* with some nice pretty paper around it of course */
 739         r.in.object = &guid;
 740         r.in.map_tower = &twr;
 741         r.in.entry_handle = &handle;
 742         r.in.max_towers = 1;
 743         r.out.entry_handle = &handle;
 744
 745         status = dcerpc_epm_Map(p, p, &r);
 746         if (!NT_STATUS_IS_OK(status)) {
 747                 dcerpc_pipe_close(p);
 748                 return status;
 749         }
 750         if (r.out.result != 0 || r.out.num_towers != 1) {
 751                 dcerpc_pipe_close(p);
 752                 return NT_STATUS_PORT_UNREACHABLE;
 753         }
 754
 755         twr_r = r.out.towers[0].twr;
 756         if (!twr_r) {
 757                 dcerpc_pipe_close(p);
 758                 return NT_STATUS_PORT_UNREACHABLE;
 759         }
 760
 761         if (twr_r->tower.num_floors != twr.tower.num_floors ||
 762             twr_r->tower.floors[3].lhs.protocol != twr.tower.floors[3].lhs.protocol) {
 763                 dcerpc_pipe_close(p);
 764                 return NT_STATUS_PORT_UNREACHABLE;
 765         }
 766
 767         binding->endpoint = dcerpc_floor_get_rhs_data(mem_ctx, &twr_r->tower.floors[3]);
 768
 769         dcerpc_pipe_close(p);
 770
 771         return NT_STATUS_OK;
 772 }
 773
 774
 775 /* open a rpc connection to a rpc pipe on SMB using the binding
 776    structure to determine the endpoint and options */
 777 static NTSTATUS dcerpc_pipe_connect_ncacn_np(struct dcerpc_pipe **pp,
 778                                              struct dcerpc_binding *binding,
 779                                              const char *pipe_uuid,
 780                                              uint32_t pipe_version,
 781                                              const char *domain,
 782                                              const char *username,
 783                                              const char *password)
 784 {
 785         struct dcerpc_pipe *p;
 786         NTSTATUS status;
 787         BOOL retry;
 788         struct smbcli_state *cli;
 789         const char *pipe_name = NULL;
 790         TALLOC_CTX *tmp_ctx;
 791
 792         *pp = NULL;
 793
 794         p = dcerpc_pipe_init(NULL);
 795         if (p == NULL) {
 796                 return NT_STATUS_NO_MEMORY;
 797         }
 798         tmp_ctx = talloc_new(p);
 799
 800         /* Look up identifier using the epmapper */
 801         if (!binding->endpoint) {
 802                 status = dcerpc_epm_map_binding(tmp_ctx, binding, pipe_uuid, pipe_version);
 803                 if (!NT_STATUS_IS_OK(status)) {
 804                         DEBUG(0,("Failed to map DCERPC/TCP NCACN_NP pipe for '%s' - %s\n",
 805                                  pipe_uuid, nt_errstr(status)));
 806                         talloc_free(p);
 807                         return status;
 808                 }
 809                 DEBUG(1,("Mapped to DCERPC/NP pipe %s\n", binding->endpoint));
 810         }
 811
 812         pipe_name = binding->endpoint;
 813
 814         if (!strncasecmp(pipe_name, "/pipe/", 6) ||
 815             !strncasecmp(pipe_name, "\\pipe\\", 6)) {
 816                 pipe_name += 6;
 817         }
 818
 819         if (pipe_name[0] != '\\') {
 820                 pipe_name = talloc_asprintf(tmp_ctx, "\\%s", pipe_name);
 821         }
 822
 823         if (!username || !username[0] ||
 824             (binding->flags & DCERPC_SCHANNEL_ANY)) {
 825                 status = smbcli_full_connection(p->conn, &cli, lp_netbios_name(),
 826                                                 binding->host, NULL,
 827                                                 "ipc$", "?????",
 828                                                 "", "", NULL, 0, &retry);
 829         } else {
 830                 status = smbcli_full_connection(p->conn, &cli, lp_netbios_name(),
 831                                                 binding->host, NULL,
 832                                                 "ipc$", "?????",
 833                                                 username, domain,
 834                                                 password, 0, &retry);
 835         }
 836         if (!NT_STATUS_IS_OK(status)) {
 837                 DEBUG(0,("Failed to connect to %s - %s\n", binding->host, nt_errstr(status)));
 838                 talloc_free(p);
 839                 return status;
 840         }
 841
 842         status = dcerpc_pipe_open_smb(p->conn, cli->tree, pipe_name);
 843         if (!NT_STATUS_IS_OK(status)) {
 844                 DEBUG(0,("Failed to open pipe %s - %s\n", pipe_name, nt_errstr(status)));
 845                 talloc_free(p);
 846                 return status;
 847         }
 848
 849         p->conn->flags = binding->flags;
 850
 851         /* remember the binding string for possible secondary connections */
 852         p->conn->binding_string = dcerpc_binding_string(p, binding);
 853
 854         if (username && username[0] && (binding->flags & DCERPC_SCHANNEL_ANY)) {
 855                 status = dcerpc_bind_auth_schannel(p, pipe_uuid, pipe_version,
 856                                                    domain, username, password);
 857         } else if (username && username[0] &&
 858                    (binding->flags & (DCERPC_CONNECT|DCERPC_SIGN|DCERPC_SEAL))) {
 859                 status = dcerpc_bind_auth_ntlm(p, pipe_uuid, pipe_version, domain, username, password);
 860         } else {
 861                 status = dcerpc_bind_auth_none(p, pipe_uuid, pipe_version);
 862
 863         }
 864
 865         if (!NT_STATUS_IS_OK(status)) {
 866                 DEBUG(0,("Failed to bind to uuid %s - %s\n", pipe_uuid, nt_errstr(status)));
 867                 talloc_free(p);
 868                 return status;
 869         }
 870
 871         (*pp) = p;
 872         talloc_free(tmp_ctx);
 873
 874         return NT_STATUS_OK;
 875 }
 876
 877 /* open a rpc connection to a rpc pipe on SMP using the binding
 878    structure to determine the endpoint and options */
 879 static NTSTATUS dcerpc_pipe_connect_ncalrpc(struct dcerpc_pipe **pp,
 880                                             struct dcerpc_binding *binding,
 881                                             const char *pipe_uuid,
 882                                             uint32_t pipe_version,
 883                                             const char *domain,
 884                                             const char *username,
 885                                             const char *password)
 886 {
 887         NTSTATUS status;
 888         struct dcerpc_pipe *p;
 889         TALLOC_CTX *tmp_ctx;
 890
 891         (*pp) = NULL;
 892
 893         p = dcerpc_pipe_init(NULL);
 894         if (p == NULL) {
 895                 return NT_STATUS_NO_MEMORY;
 896         }
 897         tmp_ctx = talloc_new(p);
 898
 899         /* Look up identifier using the epmapper */
 900         if (!binding->endpoint) {
 901                 status = dcerpc_epm_map_binding(tmp_ctx, binding, pipe_uuid, pipe_version);
 902                 if (!NT_STATUS_IS_OK(status)) {
 903                         DEBUG(0,("Failed to map DCERPC/TCP NCALRPC identifier for '%s' - %s\n",
 904                                  pipe_uuid, nt_errstr(status)));
 905                         talloc_free(p);
 906                         return status;
 907                 }
 908                 DEBUG(1,("Mapped to DCERPC/LRPC identifier %s\n", binding->endpoint));
 909         }
 910
 911         status = dcerpc_pipe_open_pipe(p->conn, binding->endpoint);
 912         if (!NT_STATUS_IS_OK(status)) {
 913                 DEBUG(0,("Failed to open ncalrpc pipe '%s' - %s\n",
 914                          binding->endpoint, nt_errstr(status)));
 915                 talloc_free(p);
 916                 return status;
 917         }
 918
 919         p->conn->flags = binding->flags;
 920
 921         /* remember the binding string for possible secondary connections */
 922         p->conn->binding_string = dcerpc_binding_string(p, binding);
 923
 924         if (username && username[0] && (binding->flags & DCERPC_SCHANNEL_ANY)) {
 925                 status = dcerpc_bind_auth_schannel(p, pipe_uuid, pipe_version,
 926                                                    domain, username, password);
 927         } else if (username && username[0]) {
 928                 status = dcerpc_bind_auth_ntlm(p, pipe_uuid, pipe_version, domain, username, password);
 929         } else {
 930                 status = dcerpc_bind_auth_none(p, pipe_uuid, pipe_version);
 931         }
 932
 933         if (!NT_STATUS_IS_OK(status)) {
 934                 DEBUG(0,("Failed to bind to uuid %s - %s\n", pipe_uuid, nt_errstr(status)));
 935                 talloc_free(p);
 936                 return status;
 937         }
 938
 939         (*pp) = p;
 940         talloc_free(tmp_ctx);
 941
 942         return status;
 943 }
 944
 945
 946
 947 /* open a rpc connection to a rpc pipe on SMP using the binding
 948    structure to determine the endpoint and options */
 949 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream(struct dcerpc_pipe **pp,
 950                                                       struct dcerpc_binding *binding,
 951                                                       const char *pipe_uuid,
 952                                                       uint32_t pipe_version,
 953                                                       const char *domain,
 954                                                       const char *username,
 955                                                       const char *password)
 956 {
 957         NTSTATUS status;
 958         struct dcerpc_pipe *p;
 959
 960         (*pp) = NULL;
 961
 962         if (!binding->endpoint) {
 963                 DEBUG(0, ("Path to unix socket not specified\n"));
 964                 return NT_STATUS_INVALID_PARAMETER;
 965         }
 966
 967         p = dcerpc_pipe_init(NULL);
 968         if (p == NULL) {
 969                 return NT_STATUS_NO_MEMORY;
 970         }
 971
 972         status = dcerpc_pipe_open_unix_stream(p->conn, binding->endpoint);
 973         if (!NT_STATUS_IS_OK(status)) {
 974                 DEBUG(0,("Failed to open unix socket %s - %s\n",
 975                          binding->endpoint, nt_errstr(status)));
 976                 talloc_free(p);
 977                 return status;
 978         }
 979
 980         p->conn->flags = binding->flags;
 981
 982         /* remember the binding string for possible secondary connections */
 983         p->conn->binding_string = dcerpc_binding_string(p, binding);
 984
 985         if (username && username[0] && (binding->flags & DCERPC_SCHANNEL_ANY)) {
 986                 status = dcerpc_bind_auth_schannel(p, pipe_uuid, pipe_version,
 987                                                    domain, username, password);
 988         } else if (username && username[0]) {
 989                 status = dcerpc_bind_auth_ntlm(p, pipe_uuid, pipe_version, domain, username, password);
 990         } else {
 991                 status = dcerpc_bind_auth_none(p, pipe_uuid, pipe_version);
 992         }
 993
 994         if (!NT_STATUS_IS_OK(status)) {
 995                 DEBUG(0,("Failed to bind to uuid %s - %s\n", pipe_uuid, nt_errstr(status)));
 996                 talloc_free(p);
 997                 return status;
 998         }
 999
1000         (*pp) = p;
1001
1002         return status;
1003 }
1004
1005 /* open a rpc connection to a rpc pipe on SMP using the binding
1006    structure to determine the endpoint and options */
1007 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp(struct dcerpc_pipe **pp,
1008                                                  struct dcerpc_binding *binding,
1009                                                  const char *pipe_uuid,
1010                                                  uint32_t pipe_version,
1011                                                  const char *domain,
1012                                                  const char *username,
1013                                                  const char *password)
1014 {
1015         NTSTATUS status;
1016         uint32_t port = 0;
1017         struct dcerpc_pipe *p;
1018         TALLOC_CTX *tmp_ctx;
1019
1020         (*pp) = NULL;
1021
1022         p = dcerpc_pipe_init(NULL);
1023         if (p == NULL) {
1024                 return NT_STATUS_NO_MEMORY;
1025         }
1026         tmp_ctx = talloc_new(p);
1027
1028         if (!binding->endpoint) {
1029                 status = dcerpc_epm_map_binding(tmp_ctx, binding,
1030                                                 pipe_uuid, pipe_version);
1031                 if (!NT_STATUS_IS_OK(status)) {
1032                         DEBUG(0,("Failed to map DCERPC/TCP port for '%s' - %s\n",
1033                                  pipe_uuid, nt_errstr(status)));
1034                         talloc_free(p);
1035                         return status;
1036                 }
1037                 DEBUG(1,("Mapped to DCERPC/TCP port %s\n", binding->endpoint));
1038         }
1039
1040         port = atoi(binding->endpoint);
1041
1042         status = dcerpc_pipe_open_tcp(p->conn, binding->host, port);
1043         if (!NT_STATUS_IS_OK(status)) {
1044                 DEBUG(0,("Failed to connect to %s:%d - %s\n",
1045                          binding->host, port, nt_errstr(status)));
1046                 talloc_free(p);
1047                 return status;
1048         }
1049
1050         p->conn->flags = binding->flags;
1051
1052         /* remember the binding string for possible secondary connections */
1053         p->conn->binding_string = dcerpc_binding_string(p, binding);
1054
1055         if (username && username[0] && (binding->flags & DCERPC_SCHANNEL_ANY)) {
1056                 status = dcerpc_bind_auth_schannel(p, pipe_uuid, pipe_version,
1057                                                    domain, username, password);
1058         } else if (username && username[0]) {
1059                 status = dcerpc_bind_auth_ntlm(p, pipe_uuid, pipe_version, domain, username, password);
1060         } else {
1061                 status = dcerpc_bind_auth_none(p, pipe_uuid, pipe_version);
1062         }
1063
1064         if (!NT_STATUS_IS_OK(status)) {
1065                 DEBUG(0,("Failed to bind to uuid %s - %s\n",
1066                          pipe_uuid, nt_errstr(status)));
1067                 talloc_free(p);
1068                 return status;
1069         }
1070
1071         (*pp) = p;
1072         talloc_free(tmp_ctx);
1073
1074         return status;
1075 }
1076
1077
1078 /* open a rpc connection to a rpc pipe, using the specified
1079    binding structure to determine the endpoint and options */
1080 NTSTATUS dcerpc_pipe_connect_b(struct dcerpc_pipe **pp,
1081                                struct dcerpc_binding *binding,
1082                                const char *pipe_uuid,
1083                                uint32_t pipe_version,
1084                                const char *domain,
1085                                const char *username,
1086                                const char *password)
1087 {
1088         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
1089
1090         switch (binding->transport) {
1091         case NCACN_NP:
1092                 status = dcerpc_pipe_connect_ncacn_np(pp, binding, pipe_uuid, pipe_version,
1093                                                       domain, username, password);
1094                 break;
1095         case NCACN_IP_TCP:
1096                 status = dcerpc_pipe_connect_ncacn_ip_tcp(pp, binding, pipe_uuid, pipe_version,
1097                                                           domain, username, password);
1098                 break;
1099         case NCACN_UNIX_STREAM:
1100                 status = dcerpc_pipe_connect_ncacn_unix_stream(pp, binding, pipe_uuid, pipe_version,
1101                                                                domain, username, password);
1102                 break;
1103         case NCALRPC:
1104                 status = dcerpc_pipe_connect_ncalrpc(pp, binding, pipe_uuid, pipe_version,
1105                                                      domain, username, password);
1106                 break;
1107         default:
1108                 return NT_STATUS_NOT_SUPPORTED;
1109         }
1110
1111         return status;
1112 }
1113
1114
1115 /* open a rpc connection to a rpc pipe, using the specified string
1116    binding to determine the endpoint and options */
1117 NTSTATUS dcerpc_pipe_connect(struct dcerpc_pipe **pp,
1118                              const char *binding,
1119                              const char *pipe_uuid,
1120                              uint32_t pipe_version,
1121                              const char *domain,
1122                              const char *username,
1123                              const char *password)
1124 {
1125         struct dcerpc_binding b;
1126         NTSTATUS status;
1127         TALLOC_CTX *tmp_ctx;
1128
1129         tmp_ctx = talloc_new(NULL);
1130
1131         status = dcerpc_parse_binding(tmp_ctx, binding, &b);
1132         if (!NT_STATUS_IS_OK(status)) {
1133                 DEBUG(0,("Failed to parse dcerpc binding '%s'\n", binding));
1134                 talloc_free(tmp_ctx);
1135                 return status;
1136         }
1137
1138         DEBUG(3,("Using binding %s\n", dcerpc_binding_string(tmp_ctx, &b)));
1139
1140         status = dcerpc_pipe_connect_b(pp, &b, pipe_uuid, pipe_version, domain, username, password);
1141
1142         talloc_free(tmp_ctx);
1143
1144         return status;
1145 }
1146
1147
1148 /*
1149   create a secondary dcerpc connection from a primary connection
1150
1151   if the primary is a SMB connection then the secondary connection
1152   will be on the same SMB connection, but use a new fnum
1153 */
1154 NTSTATUS dcerpc_secondary_connection(struct dcerpc_pipe *p, struct dcerpc_pipe **p2,
1155                                      const char *pipe_name,
1156                                      const char *pipe_uuid,
1157                                      uint32_t pipe_version)
1158 {
1159         struct smbcli_tree *tree;
1160         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
1161         struct dcerpc_binding b;
1162
1163         (*p2) = dcerpc_pipe_init(p);
1164         if (*p2 == NULL) {
1165                 return NT_STATUS_NO_MEMORY;
1166         }
1167
1168         switch (p->conn->transport.transport) {
1169         case NCACN_NP:
1170                 tree = dcerpc_smb_tree(p->conn);
1171                 if (!tree) {
1172                         return NT_STATUS_INVALID_PARAMETER;
1173                 }
1174
1175                 status = dcerpc_pipe_open_smb((*p2)->conn, tree, pipe_name);
1176                 break;
1177
1178         case NCACN_IP_TCP:
1179                 status = dcerpc_parse_binding(p, p->conn->binding_string, &b);
1180                 if (!NT_STATUS_IS_OK(status)) {
1181                         return status;
1182                 }
1183                 b.flags &= ~DCERPC_AUTH_OPTIONS;
1184                 status = dcerpc_pipe_open_tcp((*p2)->conn, b.host, atoi(b.endpoint));
1185                 break;
1186
1187         case NCALRPC:
1188                 status = dcerpc_parse_binding(p, p->conn->binding_string, &b);
1189                 if (!NT_STATUS_IS_OK(status)) {
1190                         return status;
1191                 }
1192                 b.flags &= ~DCERPC_AUTH_OPTIONS;
1193                 status = dcerpc_pipe_open_pipe((*p2)->conn, b.endpoint);
1194                 break;
1195
1196         default:
1197                 return NT_STATUS_NOT_SUPPORTED;
1198         }
1199
1200         if (!NT_STATUS_IS_OK(status)) {
1201                 talloc_free(*p2);
1202                 return status;
1203         }
1204
1205         (*p2)->conn->flags = p->conn->flags;
1206
1207         status = dcerpc_bind_auth_none(*p2, pipe_uuid, pipe_version);
1208         if (!NT_STATUS_IS_OK(status)) {
1209                 talloc_free(*p2);
1210                 return status;
1211         }
1212
1213         return NT_STATUS_OK;
1214 }
1215
1216 NTSTATUS dcerpc_generic_session_key(struct dcerpc_connection *c,
1217                                     DATA_BLOB *session_key)
1218 {
1219         /* this took quite a few CPU cycles to find ... */
1220         session_key->data = discard_const_p(unsigned char, "SystemLibraryDTC");
1221         session_key->length = 16;
1222         return NT_STATUS_OK;
1223 }
1224
1225 /*
1226   fetch the user session key - may be default (above) or the SMB session key
1227 */
1228 NTSTATUS dcerpc_fetch_session_key(struct dcerpc_pipe *p,
1229                                   DATA_BLOB *session_key)
1230 {
1231         return p->conn->security_state.session_key(p->conn, session_key);
1232 }
1233
1234
1235 /*
1236   log a rpc packet in a format suitable for ndrdump. This is especially useful
1237   for sealed packets, where ethereal cannot easily see the contents
1238
1239   this triggers on a debug level of >= 10
1240 */
1241 void dcerpc_log_packet(const struct dcerpc_interface_table *ndr,
1242                        uint32_t opnum, uint32_t flags, DATA_BLOB *pkt)
1243 {
1244         const int num_examples = 20;
1245         int i;
1246
1247         if (DEBUGLEVEL < 10) return;
1248
1249         for (i=0;i<num_examples;i++) {
1250                 char *name=NULL;
1251                 asprintf(&name, "%s/rpclog/%s-%u.%d.%s",
1252                          lp_lockdir(), ndr->name, opnum, i,
1253                          (flags&NDR_IN)?"in":"out");
1254                 if (name == NULL) {
1255                         return;
1256                 }
1257                 if (!file_exist(name, NULL)) {
1258                         if (file_save(name, pkt->data, pkt->length)) {
1259                                 DEBUG(10,("Logged rpc packet to %s\n", name));
1260                         }
1261                         free(name);
1262                         break;
1263                 }
1264                 free(name);
1265         }
1266 }
1267