2 Unix SMB/CIFS implementation.
4 server side dcerpc core code
6 Copyright (C) Andrew Tridgell 2003-2005
7 Copyright (C) Stefan (metze) Metzmacher 2004-2005
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.
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.
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.
25 #include "librpc/gen_ndr/ndr_epmapper.h"
26 #include "librpc/gen_ndr/ndr_oxidresolver.h"
27 #include "auth/auth.h"
28 #include "dlinklist.h"
29 #include "rpc_server/dcerpc_server.h"
31 #include "smbd/service_stream.h"
34 see if two endpoints match
36 static BOOL endpoints_match(const struct dcerpc_binding *ep1,
37 const struct dcerpc_binding *ep2)
39 if (ep1->transport != ep2->transport) {
43 if (!ep1->endpoint || !ep2->endpoint) {
44 return ep1->endpoint == ep2->endpoint;
47 if (strcasecmp(ep1->endpoint, ep2->endpoint) != 0)
54 find an endpoint in the dcesrv_context
56 static struct dcesrv_endpoint *find_endpoint(struct dcesrv_context *dce_ctx,
57 const struct dcerpc_binding *ep_description)
59 struct dcesrv_endpoint *ep;
60 for (ep=dce_ctx->endpoint_list; ep; ep=ep->next) {
61 if (endpoints_match(&ep->ep_description, ep_description)) {
69 find a registered context_id from a bind or alter_context
71 static struct dcesrv_connection_context *dcesrv_find_context(struct dcesrv_connection *conn,
74 struct dcesrv_connection_context *c;
75 for (c=conn->contexts;c;c=c->next) {
76 if (c->context_id == context_id) return c;
82 see if a uuid and if_version match to an interface
84 static BOOL interface_match(const struct dcesrv_interface *if1,
85 const struct dcesrv_interface *if2)
87 if (if1->if_version != if2->if_version) {
91 if (strcmp(if1->uuid, if2->uuid)==0) {
99 find the interface operations on an endpoint
101 static const struct dcesrv_interface *find_interface(const struct dcesrv_endpoint *endpoint,
102 const struct dcesrv_interface *iface)
104 struct dcesrv_if_list *ifl;
105 for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) {
106 if (interface_match(&(ifl->iface), iface)) {
107 return &(ifl->iface);
114 see if a uuid and if_version match to an interface
116 static BOOL interface_match_by_uuid(const struct dcesrv_interface *iface,
117 const char *uuid, uint32_t if_version)
119 if (iface->if_version != if_version) {
123 if (strcmp(iface->uuid, uuid)==0) {
131 find the interface operations on an endpoint by uuid
133 static const struct dcesrv_interface *find_interface_by_uuid(const struct dcesrv_endpoint *endpoint,
134 const char *uuid, uint32_t if_version)
136 struct dcesrv_if_list *ifl;
137 for (ifl=endpoint->interface_list; ifl; ifl=ifl->next) {
138 if (interface_match_by_uuid(&(ifl->iface), uuid, if_version)) {
139 return &(ifl->iface);
146 find a call that is pending in our call list
148 static struct dcesrv_call_state *dcesrv_find_call(struct dcesrv_connection *dce_conn, uint16_t call_id)
150 struct dcesrv_call_state *c;
151 for (c=dce_conn->call_list;c;c=c->next) {
152 if (c->pkt.call_id == call_id) {
160 register an interface on an endpoint
162 NTSTATUS dcesrv_interface_register(struct dcesrv_context *dce_ctx,
164 const struct dcesrv_interface *iface,
165 const struct security_descriptor *sd)
167 struct dcesrv_endpoint *ep;
168 struct dcesrv_if_list *ifl;
169 struct dcerpc_binding binding;
173 status = dcerpc_parse_binding(dce_ctx, ep_name, &binding);
175 if (NT_STATUS_IS_ERR(status)) {
176 DEBUG(0, ("Trouble parsing binding string '%s'\n", ep_name));
180 /* check if this endpoint exists
182 if ((ep=find_endpoint(dce_ctx, &binding))==NULL) {
183 ep = talloc(dce_ctx, struct dcesrv_endpoint);
185 return NT_STATUS_NO_MEMORY;
188 ep->ep_description = binding;
192 /* see if the interface is already registered on te endpoint */
193 if (find_interface(ep, iface)!=NULL) {
194 DEBUG(0,("dcesrv_interface_register: interface '%s' already registered on endpoint '%s'\n",
195 iface->name, ep_name));
196 return NT_STATUS_OBJECT_NAME_COLLISION;
199 /* talloc a new interface list element */
200 ifl = talloc(dce_ctx, struct dcesrv_if_list);
202 return NT_STATUS_NO_MEMORY;
205 /* copy the given interface struct to the one on the endpoints interface list */
206 memcpy(&(ifl->iface),iface, sizeof(struct dcesrv_interface));
208 /* if we have a security descriptor given,
209 * we should see if we can set it up on the endpoint
212 /* if there's currently no security descriptor given on the endpoint
215 if (ep->sd == NULL) {
216 ep->sd = security_descriptor_copy(dce_ctx, sd);
219 /* if now there's no security descriptor given on the endpoint
220 * something goes wrong, either we failed to copy the security descriptor
221 * or there was already one on the endpoint
223 if (ep->sd != NULL) {
224 DEBUG(0,("dcesrv_interface_register: interface '%s' failed to setup a security descriptor\n"
225 " on endpoint '%s'\n",
226 iface->name, ep_name));
227 if (add_ep) free(ep);
229 return NT_STATUS_OBJECT_NAME_COLLISION;
233 /* finally add the interface on the endpoint */
234 DLIST_ADD(ep->interface_list, ifl);
236 /* if it's a new endpoint add it to the dcesrv_context */
238 DLIST_ADD(dce_ctx->endpoint_list, ep);
241 DEBUG(4,("dcesrv_interface_register: interface '%s' registered on endpoint '%s'\n",
242 iface->name, ep_name));
247 static NTSTATUS dcesrv_inherited_session_key(struct dcesrv_connection *p,
248 DATA_BLOB *session_key)
250 if (p->auth_state.session_info->session_key.length) {
251 *session_key = p->auth_state.session_info->session_key;
254 return NT_STATUS_NO_USER_SESSION_KEY;
257 NTSTATUS dcesrv_generic_session_key(struct dcesrv_connection *p,
258 DATA_BLOB *session_key)
260 /* this took quite a few CPU cycles to find ... */
261 session_key->data = discard_const_p(uint8_t, "SystemLibraryDTC");
262 session_key->length = 16;
267 fetch the user session key - may be default (above) or the SMB session key
269 NTSTATUS dcesrv_fetch_session_key(struct dcesrv_connection *p,
270 DATA_BLOB *session_key)
272 return p->auth_state.session_key(p, session_key);
277 destroy a link to an endpoint
279 static int dcesrv_endpoint_destructor(void *ptr)
281 struct dcesrv_connection *p = ptr;
283 while (p->contexts) {
284 struct dcesrv_connection_context *c = p->contexts;
286 DLIST_REMOVE(p->contexts, c);
289 c->iface->unbind(c, c->iface);
298 connect to a dcerpc endpoint
300 NTSTATUS dcesrv_endpoint_connect(struct dcesrv_context *dce_ctx,
302 const struct dcesrv_endpoint *ep,
303 struct stream_connection *srv_conn,
304 struct dcesrv_connection **_p)
306 struct dcesrv_connection *p;
308 p = talloc(mem_ctx, struct dcesrv_connection);
309 NT_STATUS_HAVE_NO_MEMORY(p);
311 p->dce_ctx = dce_ctx;
315 p->pending_call_list = NULL;
316 p->cli_max_recv_frag = 0;
317 p->partial_input = data_blob(NULL, 0);
318 p->auth_state.auth_info = NULL;
319 p->auth_state.gensec_security = NULL;
320 p->auth_state.session_info = NULL;
321 p->auth_state.session_key = dcesrv_generic_session_key;
322 p->srv_conn = srv_conn;
324 talloc_set_destructor(p, dcesrv_endpoint_destructor);
331 search and connect to a dcerpc endpoint
333 NTSTATUS dcesrv_endpoint_search_connect(struct dcesrv_context *dce_ctx,
335 const struct dcerpc_binding *ep_description,
336 struct auth_session_info *session_info,
337 struct stream_connection *srv_conn,
338 struct dcesrv_connection **dce_conn_p)
341 const struct dcesrv_endpoint *ep;
343 /* make sure this endpoint exists */
344 ep = find_endpoint(dce_ctx, ep_description);
346 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
349 status = dcesrv_endpoint_connect(dce_ctx, mem_ctx, ep, srv_conn, dce_conn_p);
350 if (!NT_STATUS_IS_OK(status)) {
354 (*dce_conn_p)->auth_state.session_info = talloc_reference((*dce_conn_p), session_info);
355 (*dce_conn_p)->auth_state.session_key = dcesrv_inherited_session_key;
357 /* TODO: check security descriptor of the endpoint here
358 * if it's a smb named pipe
359 * if it's failed free dce_conn_p
366 static void dcesrv_init_hdr(struct dcerpc_packet *pkt)
369 pkt->rpc_vers_minor = 0;
370 if (lp_rpc_big_endian()) {
373 pkt->drep[0] = DCERPC_DREP_LE;
381 return a dcerpc fault
383 static NTSTATUS dcesrv_fault(struct dcesrv_call_state *call, uint32_t fault_code)
385 struct dcerpc_packet pkt;
386 struct dcesrv_call_reply *rep;
389 /* setup a bind_ack */
390 dcesrv_init_hdr(&pkt);
392 pkt.call_id = call->pkt.call_id;
393 pkt.ptype = DCERPC_PKT_FAULT;
394 pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
395 pkt.u.fault.alloc_hint = 0;
396 pkt.u.fault.context_id = 0;
397 pkt.u.fault.cancel_count = 0;
398 pkt.u.fault.status = fault_code;
400 rep = talloc(call, struct dcesrv_call_reply);
402 return NT_STATUS_NO_MEMORY;
405 status = dcerpc_push_auth(&rep->data, call, &pkt, NULL);
406 if (!NT_STATUS_IS_OK(status)) {
410 dcerpc_set_frag_length(&rep->data, rep->data.length);
412 DLIST_ADD_END(call->replies, rep, struct dcesrv_call_reply *);
413 DLIST_ADD_END(call->conn->call_list, call, struct dcesrv_call_state *);
420 return a dcerpc bind_nak
422 static NTSTATUS dcesrv_bind_nak(struct dcesrv_call_state *call, uint32_t reason)
424 struct dcerpc_packet pkt;
425 struct dcesrv_call_reply *rep;
428 /* setup a bind_nak */
429 dcesrv_init_hdr(&pkt);
431 pkt.call_id = call->pkt.call_id;
432 pkt.ptype = DCERPC_PKT_BIND_NAK;
433 pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
434 pkt.u.bind_nak.reject_reason = reason;
435 pkt.u.bind_nak.num_versions = 0;
437 rep = talloc(call, struct dcesrv_call_reply);
439 return NT_STATUS_NO_MEMORY;
442 status = dcerpc_push_auth(&rep->data, call, &pkt, NULL);
443 if (!NT_STATUS_IS_OK(status)) {
447 dcerpc_set_frag_length(&rep->data, rep->data.length);
449 DLIST_ADD_END(call->replies, rep, struct dcesrv_call_reply *);
450 DLIST_ADD_END(call->conn->call_list, call, struct dcesrv_call_state *);
457 handle a bind request
459 static NTSTATUS dcesrv_bind(struct dcesrv_call_state *call)
461 const char *uuid, *transfer_syntax;
462 uint32_t if_version, transfer_syntax_version;
463 struct dcerpc_packet pkt;
464 struct dcesrv_call_reply *rep;
466 uint32_t result=0, reason=0;
468 const struct dcesrv_interface *iface;
470 if (call->pkt.u.bind.num_contexts != 1 ||
471 call->pkt.u.bind.ctx_list[0].num_transfer_syntaxes < 1) {
472 return dcesrv_bind_nak(call, 0);
475 context_id = call->pkt.u.bind.ctx_list[0].context_id;
477 /* you can't bind twice on one context */
478 if (dcesrv_find_context(call->conn, context_id) != NULL) {
479 return dcesrv_bind_nak(call, 0);
482 if_version = call->pkt.u.bind.ctx_list[0].abstract_syntax.if_version;
483 uuid = GUID_string(call, &call->pkt.u.bind.ctx_list[0].abstract_syntax.uuid);
485 return dcesrv_bind_nak(call, 0);
488 transfer_syntax_version = call->pkt.u.bind.ctx_list[0].transfer_syntaxes[0].if_version;
489 transfer_syntax = GUID_string(call,
490 &call->pkt.u.bind.ctx_list[0].transfer_syntaxes[0].uuid);
491 if (!transfer_syntax ||
492 strcasecmp(NDR_GUID, transfer_syntax) != 0 ||
493 NDR_GUID_VERSION != transfer_syntax_version) {
494 /* we only do NDR encoded dcerpc */
495 return dcesrv_bind_nak(call, 0);
498 iface = find_interface_by_uuid(call->conn->endpoint, uuid, if_version);
500 DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid, if_version));
501 /* we don't know about that interface */
502 result = DCERPC_BIND_PROVIDER_REJECT;
503 reason = DCERPC_BIND_REASON_ASYNTAX;
507 /* add this context to the list of available context_ids */
508 struct dcesrv_connection_context *context = talloc(call->conn,
509 struct dcesrv_connection_context);
510 if (context == NULL) {
511 return dcesrv_bind_nak(call, 0);
513 context->conn = call->conn;
514 context->iface = iface;
515 context->context_id = context_id;
516 context->private = NULL;
517 context->handles = NULL;
518 DLIST_ADD(call->conn->contexts, context);
519 call->context = context;
522 if (call->conn->cli_max_recv_frag == 0) {
523 call->conn->cli_max_recv_frag = call->pkt.u.bind.max_recv_frag;
526 /* handle any authentication that is being requested */
527 if (!dcesrv_auth_bind(call)) {
528 /* TODO: work out the right reject code */
529 return dcesrv_bind_nak(call, 0);
532 /* setup a bind_ack */
533 dcesrv_init_hdr(&pkt);
535 pkt.call_id = call->pkt.call_id;
536 pkt.ptype = DCERPC_PKT_BIND_ACK;
537 pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
538 pkt.u.bind_ack.max_xmit_frag = 0x2000;
539 pkt.u.bind_ack.max_recv_frag = 0x2000;
540 pkt.u.bind_ack.assoc_group_id = call->pkt.u.bind.assoc_group_id;
542 /* FIXME: Use pipe name as specified by endpoint instead of interface name */
543 pkt.u.bind_ack.secondary_address = talloc_asprintf(call, "\\PIPE\\%s", iface->name);
545 pkt.u.bind_ack.secondary_address = "";
547 pkt.u.bind_ack.num_results = 1;
548 pkt.u.bind_ack.ctx_list = talloc(call, struct dcerpc_ack_ctx);
549 if (!pkt.u.bind_ack.ctx_list) {
550 return NT_STATUS_NO_MEMORY;
552 pkt.u.bind_ack.ctx_list[0].result = result;
553 pkt.u.bind_ack.ctx_list[0].reason = reason;
554 GUID_from_string(NDR_GUID, &pkt.u.bind_ack.ctx_list[0].syntax.uuid);
555 pkt.u.bind_ack.ctx_list[0].syntax.if_version = NDR_GUID_VERSION;
556 pkt.u.bind_ack.auth_info = data_blob(NULL, 0);
558 if (!dcesrv_auth_bind_ack(call, &pkt)) {
559 return dcesrv_bind_nak(call, 0);
563 status = iface->bind(call, iface);
564 if (!NT_STATUS_IS_OK(status)) {
565 DEBUG(2,("Request for dcerpc interface %s/%d rejected: %s\n",
566 uuid, if_version, nt_errstr(status)));
567 return dcesrv_bind_nak(call, 0);
571 rep = talloc(call, struct dcesrv_call_reply);
573 return NT_STATUS_NO_MEMORY;
576 status = dcerpc_push_auth(&rep->data, call, &pkt,
577 call->conn->auth_state.auth_info);
578 if (!NT_STATUS_IS_OK(status)) {
582 dcerpc_set_frag_length(&rep->data, rep->data.length);
584 DLIST_ADD_END(call->replies, rep, struct dcesrv_call_reply *);
585 DLIST_ADD_END(call->conn->call_list, call, struct dcesrv_call_state *);
592 handle a auth3 request
594 static NTSTATUS dcesrv_auth3(struct dcesrv_call_state *call)
596 /* handle the auth3 in the auth code */
597 if (!dcesrv_auth_auth3(call)) {
598 return dcesrv_fault(call, DCERPC_FAULT_OTHER);
603 /* we don't send a reply to a auth3 request, except by a
610 handle a bind request
612 static NTSTATUS dcesrv_alter_new_context(struct dcesrv_call_state *call, uint32 context_id)
614 uint32_t if_version, transfer_syntax_version;
615 const char *uuid, *transfer_syntax;
616 struct dcesrv_connection_context *context;
617 const struct dcesrv_interface *iface;
619 if_version = call->pkt.u.alter.ctx_list[0].abstract_syntax.if_version;
620 uuid = GUID_string(call, &call->pkt.u.alter.ctx_list[0].abstract_syntax.uuid);
622 return NT_STATUS_NO_MEMORY;
625 transfer_syntax_version = call->pkt.u.alter.ctx_list[0].transfer_syntaxes[0].if_version;
626 transfer_syntax = GUID_string(call,
627 &call->pkt.u.alter.ctx_list[0].transfer_syntaxes[0].uuid);
628 if (!transfer_syntax ||
629 strcasecmp(NDR_GUID, transfer_syntax) != 0 ||
630 NDR_GUID_VERSION != transfer_syntax_version) {
631 /* we only do NDR encoded dcerpc */
632 return NT_STATUS_NO_MEMORY;
635 iface = find_interface_by_uuid(call->conn->endpoint, uuid, if_version);
637 DEBUG(2,("Request for unknown dcerpc interface %s/%d\n", uuid, if_version));
638 return NT_STATUS_RPC_PROTSEQ_NOT_SUPPORTED;
641 /* add this context to the list of available context_ids */
642 context = talloc(call->conn, struct dcesrv_connection_context);
643 if (context == NULL) {
644 return NT_STATUS_NO_MEMORY;
646 context->conn = call->conn;
647 context->iface = iface;
648 context->context_id = context_id;
649 context->private = NULL;
650 context->handles = NULL;
651 DLIST_ADD(call->conn->contexts, context);
652 call->context = context;
659 handle a bind request
661 static NTSTATUS dcesrv_alter(struct dcesrv_call_state *call)
663 struct dcerpc_packet pkt;
664 struct dcesrv_call_reply *rep;
666 uint32_t result=0, reason=0;
669 /* handle any authentication that is being requested */
670 if (!dcesrv_auth_alter(call)) {
671 /* TODO: work out the right reject code */
672 result = DCERPC_BIND_PROVIDER_REJECT;
673 reason = DCERPC_BIND_REASON_ASYNTAX;
676 context_id = call->pkt.u.alter.ctx_list[0].context_id;
678 /* see if they are asking for a new interface */
680 dcesrv_find_context(call->conn, context_id) == NULL) {
681 status = dcesrv_alter_new_context(call, context_id);
682 if (!NT_STATUS_IS_OK(status)) {
683 result = DCERPC_BIND_PROVIDER_REJECT;
684 reason = DCERPC_BIND_REASON_ASYNTAX;
688 /* setup a alter_resp */
689 dcesrv_init_hdr(&pkt);
691 pkt.call_id = call->pkt.call_id;
692 pkt.ptype = DCERPC_PKT_ALTER_RESP;
693 pkt.pfc_flags = DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
694 pkt.u.alter_resp.max_xmit_frag = 0x2000;
695 pkt.u.alter_resp.max_recv_frag = 0x2000;
696 pkt.u.alter_resp.assoc_group_id = call->pkt.u.alter.assoc_group_id;
697 pkt.u.alter_resp.num_results = 1;
698 pkt.u.alter_resp.ctx_list = talloc_array(call, struct dcerpc_ack_ctx, 1);
699 if (!pkt.u.alter_resp.ctx_list) {
700 return NT_STATUS_NO_MEMORY;
702 pkt.u.alter_resp.ctx_list[0].result = result;
703 pkt.u.alter_resp.ctx_list[0].reason = reason;
704 GUID_from_string(NDR_GUID, &pkt.u.alter_resp.ctx_list[0].syntax.uuid);
705 pkt.u.alter_resp.ctx_list[0].syntax.if_version = NDR_GUID_VERSION;
706 pkt.u.alter_resp.auth_info = data_blob(NULL, 0);
707 pkt.u.alter_resp.secondary_address = "";
709 if (!dcesrv_auth_alter_ack(call, &pkt)) {
710 return dcesrv_bind_nak(call, 0);
713 rep = talloc(call, struct dcesrv_call_reply);
715 return NT_STATUS_NO_MEMORY;
718 status = dcerpc_push_auth(&rep->data, call, &pkt,
719 call->conn->auth_state.auth_info);
720 if (!NT_STATUS_IS_OK(status)) {
724 dcerpc_set_frag_length(&rep->data, rep->data.length);
726 DLIST_ADD_END(call->replies, rep, struct dcesrv_call_reply *);
727 DLIST_ADD_END(call->conn->call_list, call, struct dcesrv_call_state *);
733 handle a dcerpc request packet
735 static NTSTATUS dcesrv_request(struct dcesrv_call_state *call)
737 struct ndr_pull *pull;
739 struct dcesrv_connection_context *context;
741 call->fault_code = 0;
742 call->state_flags = call->conn->dce_ctx->state_flags;
743 call->time = timeval_current();
745 context = dcesrv_find_context(call->conn, call->pkt.u.request.context_id);
746 if (context == NULL) {
747 return dcesrv_fault(call, DCERPC_FAULT_UNK_IF);
750 pull = ndr_pull_init_blob(&call->pkt.u.request.stub_and_verifier, call);
751 NT_STATUS_HAVE_NO_MEMORY(pull);
753 call->context = context;
754 call->event_ctx = context->conn->srv_conn->event.ctx;
755 call->ndr_pull = pull;
757 if (call->pkt.pfc_flags & DCERPC_PFC_FLAG_ORPC) {
758 pull->flags |= LIBNDR_FLAG_OBJECT_PRESENT;
761 if (!(call->pkt.drep[0] & DCERPC_DREP_LE)) {
762 pull->flags |= LIBNDR_FLAG_BIGENDIAN;
765 /* unravel the NDR for the packet */
766 status = context->iface->ndr_pull(call, call, pull, &call->r);
767 if (!NT_STATUS_IS_OK(status)) {
768 return dcesrv_fault(call, call->fault_code);
771 if (pull->offset != pull->data_size) {
772 DEBUG(3,("Warning: %d extra bytes in incoming RPC request\n",
773 pull->data_size - pull->offset));
774 dump_data(10, pull->data+pull->offset, pull->data_size - pull->offset);
777 /* call the dispatch function */
778 status = context->iface->dispatch(call, call, call->r);
779 if (!NT_STATUS_IS_OK(status)) {
780 return dcesrv_fault(call, call->fault_code);
783 /* add the call to the pending list */
784 DLIST_ADD_END(call->conn->pending_call_list, call, struct dcesrv_call_state *);
786 if (call->state_flags & DCESRV_CALL_STATE_FLAG_ASYNC) {
790 return dcesrv_reply(call);
793 NTSTATUS dcesrv_reply(struct dcesrv_call_state *call)
795 struct ndr_push *push;
798 uint32_t total_length;
799 struct dcesrv_connection_context *context = call->context;
801 /* call the reply function */
802 status = context->iface->reply(call, call, call->r);
803 if (!NT_STATUS_IS_OK(status)) {
804 return dcesrv_fault(call, call->fault_code);
807 /* form the reply NDR */
808 push = ndr_push_init_ctx(call);
809 NT_STATUS_HAVE_NO_MEMORY(push);
811 /* carry over the pointer count to the reply in case we are
812 using full pointer. See NDR specification for full
814 push->ptr_count = call->ndr_pull->ptr_count;
816 if (lp_rpc_big_endian()) {
817 push->flags |= LIBNDR_FLAG_BIGENDIAN;
820 status = context->iface->ndr_push(call, call, push, call->r);
821 if (!NT_STATUS_IS_OK(status)) {
822 return dcesrv_fault(call, call->fault_code);
825 stub = ndr_push_blob(push);
827 total_length = stub.length;
831 struct dcesrv_call_reply *rep;
832 struct dcerpc_packet pkt;
834 rep = talloc(call, struct dcesrv_call_reply);
835 NT_STATUS_HAVE_NO_MEMORY(rep);
837 length = stub.length;
838 if (length + DCERPC_RESPONSE_LENGTH > call->conn->cli_max_recv_frag) {
839 /* the 32 is to cope with signing data */
840 length = call->conn->cli_max_recv_frag -
841 (DCERPC_MAX_SIGN_SIZE+DCERPC_RESPONSE_LENGTH);
844 /* form the dcerpc response packet */
845 dcesrv_init_hdr(&pkt);
847 pkt.call_id = call->pkt.call_id;
848 pkt.ptype = DCERPC_PKT_RESPONSE;
850 if (stub.length == total_length) {
851 pkt.pfc_flags |= DCERPC_PFC_FLAG_FIRST;
853 if (length == stub.length) {
854 pkt.pfc_flags |= DCERPC_PFC_FLAG_LAST;
856 pkt.u.response.alloc_hint = stub.length;
857 pkt.u.response.context_id = call->pkt.u.request.context_id;
858 pkt.u.response.cancel_count = 0;
859 pkt.u.response.stub_and_verifier.data = stub.data;
860 pkt.u.response.stub_and_verifier.length = length;
862 if (!dcesrv_auth_response(call, &rep->data, &pkt)) {
863 return dcesrv_fault(call, DCERPC_FAULT_OTHER);
866 dcerpc_set_frag_length(&rep->data, rep->data.length);
868 DLIST_ADD_END(call->replies, rep, struct dcesrv_call_reply *);
871 stub.length -= length;
872 } while (stub.length != 0);
874 /* move the call from the pending to the finished calls list */
875 DLIST_REMOVE(call->conn->pending_call_list, call);
876 DLIST_ADD_END(call->conn->call_list, call, struct dcesrv_call_state *);
878 if (call->conn->call_list && call->conn->call_list->replies) {
879 if (call->conn->srv_conn &&
880 call->conn->srv_conn->event.fde) {
881 call->conn->srv_conn->event.fde->flags |= EVENT_FD_WRITE;
890 work out if we have a full packet yet
892 static BOOL dce_full_packet(const DATA_BLOB *data)
894 if (data->length < DCERPC_FRAG_LEN_OFFSET+2) {
897 if (dcerpc_get_frag_length(data) > data->length) {
904 we might have consumed only part of our input - advance past that part
906 static void dce_partial_advance(struct dcesrv_connection *dce_conn, uint32_t offset)
910 if (dce_conn->partial_input.length == offset) {
911 data_blob_free(&dce_conn->partial_input);
915 blob = dce_conn->partial_input;
916 dce_conn->partial_input = data_blob(blob.data + offset,
917 blob.length - offset);
918 data_blob_free(&blob);
922 process some input to a dcerpc endpoint server.
924 NTSTATUS dcesrv_input_process(struct dcesrv_connection *dce_conn)
926 struct ndr_pull *ndr;
928 struct dcesrv_call_state *call;
931 call = talloc(dce_conn, struct dcesrv_call_state);
933 talloc_free(dce_conn->partial_input.data);
934 return NT_STATUS_NO_MEMORY;
936 call->conn = dce_conn;
937 call->replies = NULL;
938 call->context = NULL;
940 blob = dce_conn->partial_input;
941 blob.length = dcerpc_get_frag_length(&blob);
943 ndr = ndr_pull_init_blob(&blob, call);
945 talloc_free(dce_conn->partial_input.data);
947 return NT_STATUS_NO_MEMORY;
950 if (!(CVAL(blob.data, DCERPC_DREP_OFFSET) & DCERPC_DREP_LE)) {
951 ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
954 status = ndr_pull_dcerpc_packet(ndr, NDR_SCALARS|NDR_BUFFERS, &call->pkt);
955 if (!NT_STATUS_IS_OK(status)) {
956 talloc_free(dce_conn->partial_input.data);
961 /* we have to check the signing here, before combining the
963 if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
964 !dcesrv_auth_request(call, &blob)) {
965 dce_partial_advance(dce_conn, blob.length);
966 return dcesrv_fault(call, DCERPC_FAULT_LOGON_FAILURE);
969 dce_partial_advance(dce_conn, blob.length);
971 /* see if this is a continued packet */
972 if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
973 !(call->pkt.pfc_flags & DCERPC_PFC_FLAG_FIRST)) {
974 struct dcesrv_call_state *call2 = call;
977 /* we only allow fragmented requests, no other packet types */
978 if (call->pkt.ptype != DCERPC_PKT_REQUEST) {
979 return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
982 /* this is a continuation of an existing call - find the call then
983 tack it on the end */
984 call = dcesrv_find_call(dce_conn, call2->pkt.call_id);
986 return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
989 if (call->pkt.ptype != call2->pkt.ptype) {
990 /* trying to play silly buggers are we? */
991 return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
994 alloc_size = call->pkt.u.request.stub_and_verifier.length +
995 call2->pkt.u.request.stub_and_verifier.length;
996 if (call->pkt.u.request.alloc_hint > alloc_size) {
997 alloc_size = call->pkt.u.request.alloc_hint;
1000 call->pkt.u.request.stub_and_verifier.data =
1001 talloc_realloc(call,
1002 call->pkt.u.request.stub_and_verifier.data,
1003 uint8_t, alloc_size);
1004 if (!call->pkt.u.request.stub_and_verifier.data) {
1005 return dcesrv_fault(call2, DCERPC_FAULT_OTHER);
1007 memcpy(call->pkt.u.request.stub_and_verifier.data +
1008 call->pkt.u.request.stub_and_verifier.length,
1009 call2->pkt.u.request.stub_and_verifier.data,
1010 call2->pkt.u.request.stub_and_verifier.length);
1011 call->pkt.u.request.stub_and_verifier.length +=
1012 call2->pkt.u.request.stub_and_verifier.length;
1014 call->pkt.pfc_flags |= (call2->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST);
1019 /* this may not be the last pdu in the chain - if its isn't then
1020 just put it on the call_list and wait for the rest */
1021 if (call->pkt.ptype == DCERPC_PKT_REQUEST &&
1022 !(call->pkt.pfc_flags & DCERPC_PFC_FLAG_LAST)) {
1023 DLIST_ADD_END(dce_conn->call_list, call, struct dcesrv_call_state *);
1024 return NT_STATUS_OK;
1027 switch (call->pkt.ptype) {
1028 case DCERPC_PKT_BIND:
1029 status = dcesrv_bind(call);
1031 case DCERPC_PKT_AUTH3:
1032 status = dcesrv_auth3(call);
1034 case DCERPC_PKT_ALTER:
1035 status = dcesrv_alter(call);
1037 case DCERPC_PKT_REQUEST:
1038 status = dcesrv_request(call);
1041 status = NT_STATUS_INVALID_PARAMETER;
1045 /* if we are going to be sending a reply then add
1046 it to the list of pending calls. We add it to the end to keep the call
1047 list in the order we will answer */
1048 if (!NT_STATUS_IS_OK(status)) {
1057 provide some input to a dcerpc endpoint server. This passes data
1058 from a dcerpc client into the server
1060 NTSTATUS dcesrv_input(struct dcesrv_connection *dce_conn, const DATA_BLOB *data)
1064 dce_conn->partial_input.data = talloc_realloc(dce_conn,
1065 dce_conn->partial_input.data,
1067 dce_conn->partial_input.length + data->length);
1068 if (!dce_conn->partial_input.data) {
1069 return NT_STATUS_NO_MEMORY;
1071 memcpy(dce_conn->partial_input.data + dce_conn->partial_input.length,
1072 data->data, data->length);
1073 dce_conn->partial_input.length += data->length;
1075 while (dce_full_packet(&dce_conn->partial_input)) {
1076 status = dcesrv_input_process(dce_conn);
1077 if (!NT_STATUS_IS_OK(status)) {
1082 return NT_STATUS_OK;
1086 retrieve some output from a dcerpc server
1087 The caller supplies a function that will be called to do the
1090 The first argument to write_fn() will be 'private', the second will
1091 be a pointer to a buffer containing the data to be sent and the 3rd
1092 will be the number of bytes to be sent.
1094 write_fn() should return the number of bytes successfully written.
1096 this will return STATUS_BUFFER_OVERFLOW if there is more to be read
1097 from the current fragment
1099 NTSTATUS dcesrv_output(struct dcesrv_connection *dce_conn,
1101 ssize_t (*write_fn)(void *, DATA_BLOB *))
1103 struct dcesrv_call_state *call;
1104 struct dcesrv_call_reply *rep;
1107 call = dce_conn->call_list;
1108 if (!call || !call->replies) {
1109 if (dce_conn->pending_call_list) {
1110 /* TODO: we need to say act async here
1111 * as we know we have pending requests
1112 * which will be finished at a time
1114 return NT_STATUS_FOOBAR;
1116 return NT_STATUS_FOOBAR;
1118 rep = call->replies;
1120 nwritten = write_fn(private, &rep->data);
1121 if (nwritten == -1) {
1122 /* TODO: hmm, how do we cope with this? destroy the
1123 connection perhaps? */
1124 return NT_STATUS_UNSUCCESSFUL;
1127 rep->data.length -= nwritten;
1128 rep->data.data += nwritten;
1130 if (rep->data.length == 0) {
1131 /* we're done with this section of the call */
1132 DLIST_REMOVE(call->replies, rep);
1134 return STATUS_BUFFER_OVERFLOW;
1137 if (call->replies == NULL) {
1138 /* we're done with the whole call */
1139 DLIST_REMOVE(dce_conn->call_list, call);
1143 return NT_STATUS_OK;
1148 write_fn() for dcesrv_output_blob()
1150 static ssize_t dcesrv_output_blob_write_fn(void *private, DATA_BLOB *out)
1152 DATA_BLOB *blob = private;
1153 if (out->length < blob->length) {
1154 blob->length = out->length;
1156 memcpy(blob->data, out->data, blob->length);
1157 return blob->length;
1161 a simple wrapper for dcesrv_output() for when we want to output
1164 NTSTATUS dcesrv_output_blob(struct dcesrv_connection *dce_conn,
1167 return dcesrv_output(dce_conn, blob, dcesrv_output_blob_write_fn);
1170 static NTSTATUS dcesrv_init_context(TALLOC_CTX *mem_ctx, const char **endpoint_servers, uint32_t state_flags, struct dcesrv_context **_dce_ctx)
1173 struct dcesrv_context *dce_ctx;
1176 if (!endpoint_servers) {
1177 DEBUG(0,("dcesrv_init_context: no endpoint servers configured\n"));
1178 return NT_STATUS_INTERNAL_ERROR;
1181 dce_ctx = talloc(mem_ctx, struct dcesrv_context);
1182 NT_STATUS_HAVE_NO_MEMORY(dce_ctx);
1183 dce_ctx->endpoint_list = NULL;
1184 dce_ctx->state_flags = state_flags;
1186 for (i=0;endpoint_servers[i];i++) {
1187 const struct dcesrv_endpoint_server *ep_server;
1189 ep_server = dcesrv_ep_server_byname(endpoint_servers[i]);
1191 DEBUG(0,("dcesrv_init_context: failed to find endpoint server = '%s'\n", endpoint_servers[i]));
1192 return NT_STATUS_INTERNAL_ERROR;
1195 status = ep_server->init_server(dce_ctx, ep_server);
1196 if (!NT_STATUS_IS_OK(status)) {
1197 DEBUG(0,("dcesrv_init_context: failed to init endpoint server = '%s': %s\n", endpoint_servers[i],
1198 nt_errstr(status)));
1203 *_dce_ctx = dce_ctx;
1204 return NT_STATUS_OK;
1208 initialise the dcerpc server context for ncacn_np based services
1210 NTSTATUS dcesrv_init_ipc_context(TALLOC_CTX *mem_ctx, struct dcesrv_context **_dce_ctx)
1213 struct dcesrv_context *dce_ctx;
1215 status = dcesrv_init_context(mem_ctx, lp_dcerpc_endpoint_servers(), 0, &dce_ctx);
1216 NT_STATUS_NOT_OK_RETURN(status);
1218 *_dce_ctx = dce_ctx;
1219 return NT_STATUS_OK;
1222 /* the list of currently registered DCERPC endpoint servers.
1224 static struct ep_server {
1225 struct dcesrv_endpoint_server *ep_server;
1226 } *ep_servers = NULL;
1227 static int num_ep_servers;
1230 register a DCERPC endpoint server.
1232 The 'name' can be later used by other backends to find the operations
1233 structure for this backend.
1235 The 'type' is used to specify whether this is for a disk, printer or IPC$ share
1237 NTSTATUS dcerpc_register_ep_server(const void *_ep_server)
1239 const struct dcesrv_endpoint_server *ep_server = _ep_server;
1241 if (dcesrv_ep_server_byname(ep_server->name) != NULL) {
1242 /* its already registered! */
1243 DEBUG(0,("DCERPC endpoint server '%s' already registered\n",
1245 return NT_STATUS_OBJECT_NAME_COLLISION;
1248 ep_servers = realloc_p(ep_servers, struct ep_server, num_ep_servers+1);
1250 smb_panic("out of memory in dcerpc_register");
1253 ep_servers[num_ep_servers].ep_server = smb_xmemdup(ep_server, sizeof(*ep_server));
1254 ep_servers[num_ep_servers].ep_server->name = smb_xstrdup(ep_server->name);
1258 DEBUG(3,("DCERPC endpoint server '%s' registered\n",
1261 return NT_STATUS_OK;
1265 return the operations structure for a named backend of the specified type
1267 const struct dcesrv_endpoint_server *dcesrv_ep_server_byname(const char *name)
1271 for (i=0;i<num_ep_servers;i++) {
1272 if (strcmp(ep_servers[i].ep_server->name, name) == 0) {
1273 return ep_servers[i].ep_server;
1281 return the DCERPC module version, and the size of some critical types
1282 This can be used by endpoint server modules to either detect compilation errors, or provide
1283 multiple implementations for different smbd compilation options in one module
1285 const struct dcesrv_critical_sizes *dcerpc_module_version(void)
1287 static const struct dcesrv_critical_sizes critical_sizes = {
1288 DCERPC_MODULE_VERSION,
1289 sizeof(struct dcesrv_context),
1290 sizeof(struct dcesrv_endpoint),
1291 sizeof(struct dcesrv_endpoint_server),
1292 sizeof(struct dcesrv_interface),
1293 sizeof(struct dcesrv_if_list),
1294 sizeof(struct dcesrv_connection),
1295 sizeof(struct dcesrv_call_state),
1296 sizeof(struct dcesrv_auth),
1297 sizeof(struct dcesrv_handle)
1300 return &critical_sizes;
1304 initialise the dcerpc server context for socket based services
1306 static NTSTATUS dcesrv_init(struct event_context *event_context, const struct model_ops *model_ops)
1309 struct dcesrv_context *dce_ctx;
1311 status = dcesrv_init_context(event_context,
1312 lp_dcerpc_endpoint_servers(),
1313 DCESRV_CALL_STATE_FLAG_MAY_ASYNC,
1315 NT_STATUS_NOT_OK_RETURN(status);
1317 return dcesrv_sock_init(dce_ctx, event_context, model_ops);
1321 NTSTATUS server_service_rpc_init(void)
1323 return register_server_service("rpc", dcesrv_init);