2 Unix SMB/CIFS implementation.
4 Samba internal messaging functions
6 Copyright (C) Andrew Tridgell 2004
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "lib/events/events.h"
24 #include "system/filesys.h"
25 #include "messaging/messaging.h"
26 #include "../lib/util/dlinklist.h"
27 #include "lib/socket/socket.h"
28 #include "librpc/gen_ndr/ndr_irpc.h"
29 #include "lib/messaging/irpc.h"
30 #include "lib/tdb_wrap/tdb_wrap.h"
31 #include "../lib/util/unix_privs.h"
32 #include "librpc/rpc/dcerpc.h"
33 #include "../lib/tdb_compat/tdb_compat.h"
34 #include "../lib/util/util_tdb.h"
35 #include "cluster/cluster.h"
36 #include "../lib/util/tevent_ntstatus.h"
37 #include "lib/param/param.h"
39 /* change the message version with any incompatible changes in the protocol */
40 #define IMESSAGING_VERSION 1
46 struct imessaging_context *msg_ctx;
49 void (*handler)(struct irpc_request *irpc, struct irpc_message *m);
54 struct imessaging_context {
55 struct server_id server_id;
56 struct socket_context *sock;
57 const char *base_path;
59 struct loadparm_context *lp_ctx;
60 struct dispatch_fn **dispatch;
62 struct idr_context *dispatch_tree;
63 struct imessaging_rec *pending;
64 struct imessaging_rec *retry_queue;
65 struct irpc_list *irpc;
66 struct idr_context *idr;
68 struct timeval start_time;
69 struct tevent_timer *retry_te;
71 struct tevent_context *ev;
72 struct tevent_fd *fde;
76 /* we have a linked list of dispatch handlers for each msg_type that
77 this messaging server can deal with */
79 struct dispatch_fn *next, *prev;
85 /* an individual message */
86 struct imessaging_rec {
87 struct imessaging_rec *next, *prev;
88 struct imessaging_context *msg;
91 struct imessaging_header {
94 struct server_id from;
104 static void irpc_handler(struct imessaging_context *, void *,
105 uint32_t, struct server_id, DATA_BLOB *);
109 A useful function for testing the message system.
111 static void ping_message(struct imessaging_context *msg, void *private_data,
112 uint32_t msg_type, struct server_id src, DATA_BLOB *data)
114 char *task_id = server_id_str(NULL, &src);
115 DEBUG(1,("INFO: Received PING message from server %s [%.*s]\n",
116 task_id, (int)data->length,
117 data->data?(const char *)data->data:""));
118 talloc_free(task_id);
119 imessaging_send(msg, src, MSG_PONG, data);
123 return uptime of messaging server via irpc
125 static NTSTATUS irpc_uptime(struct irpc_message *msg,
126 struct irpc_uptime *r)
128 struct imessaging_context *ctx = talloc_get_type(msg->private_data, struct imessaging_context);
129 *r->out.start_time = timeval_to_nttime(&ctx->start_time);
134 return the path to a messaging socket
136 static char *imessaging_path(struct imessaging_context *msg, struct server_id server_id)
138 TALLOC_CTX *tmp_ctx = talloc_new(msg);
139 const char *id = server_id_str(tmp_ctx, &server_id);
144 s = talloc_asprintf(msg, "%s/msg.%s", msg->base_path, id);
145 talloc_steal(s, tmp_ctx);
150 dispatch a fully received message
152 note that this deliberately can match more than one message handler
153 per message. That allows a single messasging context to register
154 (for example) a debug handler for more than one piece of code
156 static void imessaging_dispatch(struct imessaging_context *msg, struct imessaging_rec *rec)
158 struct dispatch_fn *d, *next;
160 /* temporary IDs use an idtree, the rest use a array of pointers */
161 if (rec->header->msg_type >= MSG_TMP_BASE) {
162 d = (struct dispatch_fn *)idr_find(msg->dispatch_tree,
163 rec->header->msg_type);
164 } else if (rec->header->msg_type < msg->num_types) {
165 d = msg->dispatch[rec->header->msg_type];
170 for (; d; d = next) {
173 data.data = rec->packet.data + sizeof(*rec->header);
174 data.length = rec->header->length;
175 d->fn(msg, d->private_data, d->msg_type, rec->header->from, &data);
177 rec->header->length = 0;
181 handler for messages that arrive from other nodes in the cluster
183 static void cluster_message_handler(struct imessaging_context *msg, DATA_BLOB packet)
185 struct imessaging_rec *rec;
187 rec = talloc(msg, struct imessaging_rec);
189 smb_panic("Unable to allocate imessaging_rec");
193 rec->path = msg->path;
194 rec->header = (struct imessaging_header *)packet.data;
195 rec->packet = packet;
198 if (packet.length != sizeof(*rec->header) + rec->header->length) {
199 DEBUG(0,("messaging: bad message header size %d should be %d\n",
200 rec->header->length, (int)(packet.length - sizeof(*rec->header))));
205 imessaging_dispatch(msg, rec);
212 try to send the message
214 static NTSTATUS try_send(struct imessaging_rec *rec)
216 struct imessaging_context *msg = rec->msg;
220 struct socket_address *path;
222 /* rec->path is the path of the *other* socket, where we want
224 path = socket_address_from_strings(msg, msg->sock->backend_name,
227 return NT_STATUS_NO_MEMORY;
230 /* we send with privileges so messages work from any context */
231 priv = root_privileges();
232 status = socket_sendto(msg->sock, &rec->packet, &nsent, path);
240 retry backed off messages
242 static void msg_retry_timer(struct tevent_context *ev, struct tevent_timer *te,
243 struct timeval t, void *private_data)
245 struct imessaging_context *msg = talloc_get_type(private_data,
246 struct imessaging_context);
247 msg->retry_te = NULL;
249 /* put the messages back on the main queue */
250 while (msg->retry_queue) {
251 struct imessaging_rec *rec = msg->retry_queue;
252 DLIST_REMOVE(msg->retry_queue, rec);
253 DLIST_ADD_END(msg->pending, rec, struct imessaging_rec *);
256 TEVENT_FD_WRITEABLE(msg->event.fde);
260 handle a socket write event
262 static void imessaging_send_handler(struct imessaging_context *msg)
264 while (msg->pending) {
265 struct imessaging_rec *rec = msg->pending;
267 status = try_send(rec);
268 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
270 if (rec->retries > 3) {
271 /* we're getting continuous write errors -
272 backoff this record */
273 DLIST_REMOVE(msg->pending, rec);
274 DLIST_ADD_END(msg->retry_queue, rec,
275 struct imessaging_rec *);
276 if (msg->retry_te == NULL) {
278 tevent_add_timer(msg->event.ev, msg,
279 timeval_current_ofs(1, 0),
280 msg_retry_timer, msg);
286 if (!NT_STATUS_IS_OK(status)) {
287 TALLOC_CTX *tmp_ctx = talloc_new(msg);
288 DEBUG(1,("messaging: Lost message from %s to %s of type %u - %s\n",
289 server_id_str(tmp_ctx, &rec->header->from),
290 server_id_str(tmp_ctx, &rec->header->to),
291 rec->header->msg_type,
293 talloc_free(tmp_ctx);
295 DLIST_REMOVE(msg->pending, rec);
298 if (msg->pending == NULL) {
299 TEVENT_FD_NOT_WRITEABLE(msg->event.fde);
304 handle a new incoming packet
306 static void imessaging_recv_handler(struct imessaging_context *msg)
308 struct imessaging_rec *rec;
313 /* see how many bytes are in the next packet */
314 status = socket_pending(msg->sock, &msize);
315 if (!NT_STATUS_IS_OK(status)) {
316 DEBUG(0,("socket_pending failed in messaging - %s\n",
321 packet = data_blob_talloc(msg, NULL, msize);
322 if (packet.data == NULL) {
323 /* assume this is temporary and retry */
327 status = socket_recv(msg->sock, packet.data, msize, &msize);
328 if (!NT_STATUS_IS_OK(status)) {
329 data_blob_free(&packet);
333 if (msize < sizeof(*rec->header)) {
334 DEBUG(0,("messaging: bad message of size %d\n", (int)msize));
335 data_blob_free(&packet);
339 rec = talloc(msg, struct imessaging_rec);
341 smb_panic("Unable to allocate imessaging_rec");
344 talloc_steal(rec, packet.data);
346 rec->path = msg->path;
347 rec->header = (struct imessaging_header *)packet.data;
348 rec->packet = packet;
351 if (msize != sizeof(*rec->header) + rec->header->length) {
352 DEBUG(0,("messaging: bad message header size %d should be %d\n",
353 rec->header->length, (int)(msize - sizeof(*rec->header))));
358 imessaging_dispatch(msg, rec);
364 handle a socket event
366 static void imessaging_handler(struct tevent_context *ev, struct tevent_fd *fde,
367 uint16_t flags, void *private_data)
369 struct imessaging_context *msg = talloc_get_type(private_data,
370 struct imessaging_context);
371 if (flags & TEVENT_FD_WRITE) {
372 imessaging_send_handler(msg);
374 if (flags & TEVENT_FD_READ) {
375 imessaging_recv_handler(msg);
381 Register a dispatch function for a particular message type.
383 NTSTATUS imessaging_register(struct imessaging_context *msg, void *private_data,
384 uint32_t msg_type, msg_callback_t fn)
386 struct dispatch_fn *d;
388 /* possibly expand dispatch array */
389 if (msg_type >= msg->num_types) {
390 struct dispatch_fn **dp;
392 dp = talloc_realloc(msg, msg->dispatch, struct dispatch_fn *, msg_type+1);
393 NT_STATUS_HAVE_NO_MEMORY(dp);
395 for (i=msg->num_types;i<=msg_type;i++) {
396 msg->dispatch[i] = NULL;
398 msg->num_types = msg_type+1;
401 d = talloc_zero(msg->dispatch, struct dispatch_fn);
402 NT_STATUS_HAVE_NO_MEMORY(d);
403 d->msg_type = msg_type;
404 d->private_data = private_data;
407 DLIST_ADD(msg->dispatch[msg_type], d);
413 register a temporary message handler. The msg_type is allocated
416 NTSTATUS imessaging_register_tmp(struct imessaging_context *msg, void *private_data,
417 msg_callback_t fn, uint32_t *msg_type)
419 struct dispatch_fn *d;
422 d = talloc_zero(msg->dispatch, struct dispatch_fn);
423 NT_STATUS_HAVE_NO_MEMORY(d);
424 d->private_data = private_data;
427 id = idr_get_new_above(msg->dispatch_tree, d, MSG_TMP_BASE, UINT16_MAX);
430 return NT_STATUS_TOO_MANY_CONTEXT_IDS;
433 d->msg_type = (uint32_t)id;
434 (*msg_type) = d->msg_type;
440 De-register the function for a particular message type.
442 void imessaging_deregister(struct imessaging_context *msg, uint32_t msg_type, void *private_data)
444 struct dispatch_fn *d, *next;
446 if (msg_type >= msg->num_types) {
447 d = (struct dispatch_fn *)idr_find(msg->dispatch_tree,
450 idr_remove(msg->dispatch_tree, msg_type);
455 for (d = msg->dispatch[msg_type]; d; d = next) {
457 if (d->private_data == private_data) {
458 DLIST_REMOVE(msg->dispatch[msg_type], d);
465 Send a message to a particular server
467 NTSTATUS imessaging_send(struct imessaging_context *msg, struct server_id server,
468 uint32_t msg_type, const DATA_BLOB *data)
470 struct imessaging_rec *rec;
472 size_t dlength = data?data->length:0;
474 rec = talloc(msg, struct imessaging_rec);
476 return NT_STATUS_NO_MEMORY;
479 rec->packet = data_blob_talloc(rec, NULL, sizeof(*rec->header) + dlength);
480 if (rec->packet.data == NULL) {
482 return NT_STATUS_NO_MEMORY;
487 rec->header = (struct imessaging_header *)rec->packet.data;
489 ZERO_STRUCTP(rec->header);
490 rec->header->version = IMESSAGING_VERSION;
491 rec->header->msg_type = msg_type;
492 rec->header->from = msg->server_id;
493 rec->header->to = server;
494 rec->header->length = dlength;
496 memcpy(rec->packet.data + sizeof(*rec->header),
497 data->data, dlength);
500 if (!cluster_node_equal(&msg->server_id, &server)) {
501 /* the destination is on another node - dispatch via
503 status = cluster_message_send(server, &rec->packet);
508 rec->path = imessaging_path(msg, server);
509 talloc_steal(rec, rec->path);
511 if (msg->pending != NULL) {
512 status = STATUS_MORE_ENTRIES;
514 status = try_send(rec);
517 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
518 if (msg->pending == NULL) {
519 TEVENT_FD_WRITEABLE(msg->event.fde);
521 DLIST_ADD_END(msg->pending, rec, struct imessaging_rec *);
531 Send a message to a particular server, with the message containing a single pointer
533 NTSTATUS imessaging_send_ptr(struct imessaging_context *msg, struct server_id server,
534 uint32_t msg_type, void *ptr)
538 blob.data = (uint8_t *)&ptr;
539 blob.length = sizeof(void *);
541 return imessaging_send(msg, server, msg_type, &blob);
546 remove our messaging socket and database entry
548 int imessaging_cleanup(struct imessaging_context *msg)
554 DEBUG(5,("imessaging: cleaning up %s\n", msg->path));
556 while (msg->names && msg->names[0]) {
557 irpc_remove_name(msg, msg->names[0]);
563 create the listening socket and setup the dispatcher
565 use temporary=true when you want a destructor to remove the
566 associated messaging socket and database entry on talloc free. Don't
567 use this in processes that may fork and a child may talloc free this
570 struct imessaging_context *imessaging_init(TALLOC_CTX *mem_ctx,
571 struct loadparm_context *lp_ctx,
572 struct server_id server_id,
573 struct tevent_context *ev,
576 struct imessaging_context *msg;
578 struct socket_address *path;
585 msg = talloc_zero(mem_ctx, struct imessaging_context);
590 /* setup a handler for messages from other cluster nodes, if appropriate */
591 status = cluster_message_init(msg, server_id, cluster_message_handler);
592 if (!NT_STATUS_IS_OK(status)) {
596 /* create the messaging directory if needed */
598 msg->lp_ctx = talloc_reference(msg, lp_ctx);
603 msg->base_path = lpcfg_imessaging_path(msg, lp_ctx);
604 if (msg->base_path == NULL) {
608 ok = directory_create_or_exist_strict(msg->base_path, geteuid(), 0700);
613 msg->path = imessaging_path(msg, server_id);
614 if (msg->path == NULL) {
618 msg->server_id = server_id;
619 msg->idr = idr_init(msg);
620 if (msg->idr == NULL) {
624 msg->dispatch_tree = idr_init(msg);
625 if (msg->dispatch_tree == NULL) {
629 msg->start_time = timeval_current();
631 status = socket_create("unix", SOCKET_TYPE_DGRAM, &msg->sock, 0);
632 if (!NT_STATUS_IS_OK(status)) {
636 /* by stealing here we ensure that the socket is cleaned up (and even
638 talloc_steal(msg, msg->sock);
640 path = socket_address_from_strings(msg, msg->sock->backend_name,
646 status = socket_listen(msg->sock, path, 50, 0);
647 if (!NT_STATUS_IS_OK(status)) {
648 DEBUG(0,("Unable to setup messaging listener for '%s':%s\n", msg->path, nt_errstr(status)));
652 /* it needs to be non blocking for sends */
653 set_blocking(socket_get_fd(msg->sock), false);
656 msg->event.fde = tevent_add_fd(ev, msg, socket_get_fd(msg->sock),
657 TEVENT_FD_READ, imessaging_handler, msg);
658 tevent_fd_set_auto_close(msg->event.fde);
661 talloc_set_destructor(msg, imessaging_cleanup);
664 imessaging_register(msg, NULL, MSG_PING, ping_message);
665 imessaging_register(msg, NULL, MSG_IRPC, irpc_handler);
666 IRPC_REGISTER(msg, irpc, IRPC_UPTIME, irpc_uptime, msg);
675 A hack, for the short term until we get 'client only' messaging in place
677 struct imessaging_context *imessaging_client_init(TALLOC_CTX *mem_ctx,
678 struct loadparm_context *lp_ctx,
679 struct tevent_context *ev)
684 id.task_id = generate_random();
685 id.vnn = NONCLUSTER_VNN;
687 /* This is because we are not in the s3 serverid database */
688 id.unique_id = SERVERID_UNIQUE_ID_NOT_TO_VERIFY;
690 return imessaging_init(mem_ctx, lp_ctx, id, ev, true);
693 a list of registered irpc server functions
696 struct irpc_list *next, *prev;
698 const struct ndr_interface_table *table;
706 register a irpc server function
708 NTSTATUS irpc_register(struct imessaging_context *msg_ctx,
709 const struct ndr_interface_table *table,
710 int callnum, irpc_function_t fn, void *private_data)
712 struct irpc_list *irpc;
714 /* override an existing handler, if any */
715 for (irpc=msg_ctx->irpc; irpc; irpc=irpc->next) {
716 if (irpc->table == table && irpc->callnum == callnum) {
721 irpc = talloc(msg_ctx, struct irpc_list);
722 NT_STATUS_HAVE_NO_MEMORY(irpc);
723 DLIST_ADD(msg_ctx->irpc, irpc);
727 irpc->callnum = callnum;
729 irpc->private_data = private_data;
730 irpc->uuid = irpc->table->syntax_id.uuid;
737 handle an incoming irpc reply message
739 static void irpc_handler_reply(struct imessaging_context *msg_ctx, struct irpc_message *m)
741 struct irpc_request *irpc;
743 irpc = (struct irpc_request *)idr_find(msg_ctx->idr, m->header.callid);
744 if (irpc == NULL) return;
746 irpc->incoming.handler(irpc, m);
752 NTSTATUS irpc_send_reply(struct irpc_message *m, NTSTATUS status)
754 struct ndr_push *push;
756 enum ndr_err_code ndr_err;
758 m->header.status = status;
760 /* setup the reply */
761 push = ndr_push_init_ctx(m->ndr);
763 status = NT_STATUS_NO_MEMORY;
767 m->header.flags |= IRPC_FLAG_REPLY;
768 m->header.creds.token= NULL;
770 /* construct the packet */
771 ndr_err = ndr_push_irpc_header(push, NDR_SCALARS|NDR_BUFFERS, &m->header);
772 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
773 status = ndr_map_error2ntstatus(ndr_err);
777 ndr_err = m->irpc->table->calls[m->irpc->callnum].ndr_push(push, NDR_OUT, m->data);
778 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
779 status = ndr_map_error2ntstatus(ndr_err);
783 /* send the reply message */
784 packet = ndr_push_blob(push);
785 status = imessaging_send(m->msg_ctx, m->from, MSG_IRPC, &packet);
786 if (!NT_STATUS_IS_OK(status)) goto failed;
794 handle an incoming irpc request message
796 static void irpc_handler_request(struct imessaging_context *msg_ctx,
797 struct irpc_message *m)
801 enum ndr_err_code ndr_err;
803 for (i=msg_ctx->irpc; i; i=i->next) {
804 if (GUID_equal(&i->uuid, &m->header.uuid) &&
805 i->table->syntax_id.if_version == m->header.if_version &&
806 i->callnum == m->header.callnum) {
812 /* no registered handler for this message */
817 /* allocate space for the structure */
818 r = talloc_zero_size(m->ndr, i->table->calls[m->header.callnum].struct_size);
819 if (r == NULL) goto failed;
821 m->ndr->flags |= LIBNDR_FLAG_REF_ALLOC;
823 /* parse the request data */
824 ndr_err = i->table->calls[i->callnum].ndr_pull(m->ndr, NDR_IN, r);
825 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
828 m->private_data= i->private_data;
829 m->defer_reply = false;
831 m->msg_ctx = msg_ctx;
834 m->ev = msg_ctx->event.ev;
836 m->header.status = i->fn(m, r);
839 /* the server function won't ever be replying to this request */
844 if (m->defer_reply) {
845 /* the server function has asked to defer the reply to later */
846 talloc_steal(msg_ctx, m);
850 irpc_send_reply(m, m->header.status);
858 handle an incoming irpc message
860 static void irpc_handler(struct imessaging_context *msg_ctx, void *private_data,
861 uint32_t msg_type, struct server_id src, DATA_BLOB *packet)
863 struct irpc_message *m;
864 enum ndr_err_code ndr_err;
866 m = talloc(msg_ctx, struct irpc_message);
867 if (m == NULL) goto failed;
871 m->ndr = ndr_pull_init_blob(packet, m);
872 if (m->ndr == NULL) goto failed;
874 m->ndr->flags |= LIBNDR_FLAG_REF_ALLOC;
876 ndr_err = ndr_pull_irpc_header(m->ndr, NDR_BUFFERS|NDR_SCALARS, &m->header);
877 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
879 if (m->header.flags & IRPC_FLAG_REPLY) {
880 irpc_handler_reply(msg_ctx, m);
882 irpc_handler_request(msg_ctx, m);
892 destroy a irpc request
894 static int irpc_destructor(struct irpc_request *irpc)
896 if (irpc->callid != -1) {
897 idr_remove(irpc->msg_ctx->idr, irpc->callid);
905 open the naming database
907 static struct tdb_wrap *irpc_namedb_open(struct imessaging_context *msg_ctx)
910 char *path = talloc_asprintf(msg_ctx, "%s/names.tdb", msg_ctx->base_path);
914 t = tdb_wrap_open(msg_ctx, path,
915 lpcfg_tdb_hash_size(msg_ctx->lp_ctx, path),
916 lpcfg_tdb_flags(msg_ctx->lp_ctx, 0),
917 O_RDWR|O_CREAT, 0660);
924 add a string name that this irpc server can be called on
926 NTSTATUS irpc_add_name(struct imessaging_context *msg_ctx, const char *name)
931 NTSTATUS status = NT_STATUS_OK;
933 t = irpc_namedb_open(msg_ctx);
934 NT_STATUS_HAVE_NO_MEMORY(t);
936 if (tdb_lock_bystring(t->tdb, name) != 0) {
938 return NT_STATUS_LOCK_NOT_GRANTED;
940 rec = tdb_fetch_bystring(t->tdb, name);
941 count = rec.dsize / sizeof(struct server_id);
942 rec.dptr = (unsigned char *)realloc_p(rec.dptr, struct server_id, count+1);
943 rec.dsize += sizeof(struct server_id);
944 if (rec.dptr == NULL) {
945 tdb_unlock_bystring(t->tdb, name);
947 return NT_STATUS_NO_MEMORY;
949 ((struct server_id *)rec.dptr)[count] = msg_ctx->server_id;
950 if (tdb_store_bystring(t->tdb, name, rec, 0) != 0) {
951 status = NT_STATUS_INTERNAL_ERROR;
954 tdb_unlock_bystring(t->tdb, name);
957 msg_ctx->names = str_list_add(msg_ctx->names, name);
958 talloc_steal(msg_ctx, msg_ctx->names);
964 return a list of server ids for a server name
966 struct server_id *irpc_servers_byname(struct imessaging_context *msg_ctx,
973 struct server_id *ret;
975 t = irpc_namedb_open(msg_ctx);
980 if (tdb_lock_bystring(t->tdb, name) != 0) {
984 rec = tdb_fetch_bystring(t->tdb, name);
985 if (rec.dptr == NULL) {
986 tdb_unlock_bystring(t->tdb, name);
990 count = rec.dsize / sizeof(struct server_id);
991 ret = talloc_array(mem_ctx, struct server_id, count+1);
993 tdb_unlock_bystring(t->tdb, name);
997 for (i=0;i<count;i++) {
998 ret[i] = ((struct server_id *)rec.dptr)[i];
1000 server_id_set_disconnected(&ret[i]);
1002 tdb_unlock_bystring(t->tdb, name);
1008 static int all_servers_func(struct tdb_context *tdb, TDB_DATA key, TDB_DATA data, void *state)
1010 struct irpc_name_records *name_records = talloc_get_type(state, struct irpc_name_records);
1011 struct irpc_name_record *name_record;
1015 = talloc_realloc(name_records, name_records->names,
1016 struct irpc_name_record *, name_records->num_records+1);
1017 if (!name_records->names) {
1021 name_records->names[name_records->num_records] = name_record
1022 = talloc(name_records->names,
1023 struct irpc_name_record);
1028 name_records->num_records++;
1031 = talloc_strndup(name_record,
1032 (const char *)key.dptr, key.dsize);
1033 if (!name_record->name) {
1037 name_record->count = data.dsize / sizeof(struct server_id);
1038 name_record->ids = talloc_array(name_record,
1040 name_record->count);
1041 if (name_record->ids == NULL) {
1044 for (i=0;i<name_record->count;i++) {
1045 name_record->ids[i] = ((struct server_id *)data.dptr)[i];
1051 return a list of server ids for a server name
1053 struct irpc_name_records *irpc_all_servers(struct imessaging_context *msg_ctx,
1054 TALLOC_CTX *mem_ctx)
1058 struct irpc_name_records *name_records = talloc_zero(mem_ctx, struct irpc_name_records);
1059 if (name_records == NULL) {
1063 t = irpc_namedb_open(msg_ctx);
1068 ret = tdb_traverse_read(t->tdb, all_servers_func, name_records);
1076 return name_records;
1080 remove a name from a messaging context
1082 void irpc_remove_name(struct imessaging_context *msg_ctx, const char *name)
1087 struct server_id *ids;
1089 str_list_remove(msg_ctx->names, name);
1091 t = irpc_namedb_open(msg_ctx);
1096 if (tdb_lock_bystring(t->tdb, name) != 0) {
1100 rec = tdb_fetch_bystring(t->tdb, name);
1101 if (rec.dptr == NULL) {
1102 tdb_unlock_bystring(t->tdb, name);
1106 count = rec.dsize / sizeof(struct server_id);
1109 tdb_unlock_bystring(t->tdb, name);
1113 ids = (struct server_id *)rec.dptr;
1114 for (i=0;i<count;i++) {
1115 if (cluster_id_equal(&ids[i], &msg_ctx->server_id)) {
1117 memmove(ids+i, ids+i+1,
1118 sizeof(struct server_id) * (count-(i+1)));
1120 rec.dsize -= sizeof(struct server_id);
1124 tdb_store_bystring(t->tdb, name, rec, 0);
1126 tdb_unlock_bystring(t->tdb, name);
1130 struct server_id imessaging_get_server_id(struct imessaging_context *msg_ctx)
1132 return msg_ctx->server_id;
1135 struct irpc_bh_state {
1136 struct imessaging_context *msg_ctx;
1137 struct server_id server_id;
1138 const struct ndr_interface_table *table;
1140 struct security_token *token;
1143 static bool irpc_bh_is_connected(struct dcerpc_binding_handle *h)
1145 struct irpc_bh_state *hs = dcerpc_binding_handle_data(h,
1146 struct irpc_bh_state);
1155 static uint32_t irpc_bh_set_timeout(struct dcerpc_binding_handle *h,
1158 struct irpc_bh_state *hs = dcerpc_binding_handle_data(h,
1159 struct irpc_bh_state);
1160 uint32_t old = hs->timeout;
1162 hs->timeout = timeout;
1167 struct irpc_bh_raw_call_state {
1168 struct irpc_request *irpc;
1171 DATA_BLOB in_packet;
1175 static void irpc_bh_raw_call_incoming_handler(struct irpc_request *irpc,
1176 struct irpc_message *m);
1178 static struct tevent_req *irpc_bh_raw_call_send(TALLOC_CTX *mem_ctx,
1179 struct tevent_context *ev,
1180 struct dcerpc_binding_handle *h,
1181 const struct GUID *object,
1184 const uint8_t *in_data,
1187 struct irpc_bh_state *hs =
1188 dcerpc_binding_handle_data(h,
1189 struct irpc_bh_state);
1190 struct tevent_req *req;
1191 struct irpc_bh_raw_call_state *state;
1193 struct irpc_header header;
1194 struct ndr_push *ndr;
1196 enum ndr_err_code ndr_err;
1198 req = tevent_req_create(mem_ctx, &state,
1199 struct irpc_bh_raw_call_state);
1203 state->opnum = opnum;
1204 state->in_data.data = discard_const_p(uint8_t, in_data);
1205 state->in_data.length = in_length;
1207 ok = irpc_bh_is_connected(h);
1209 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
1210 return tevent_req_post(req, ev);
1213 state->irpc = talloc_zero(state, struct irpc_request);
1214 if (tevent_req_nomem(state->irpc, req)) {
1215 return tevent_req_post(req, ev);
1218 state->irpc->msg_ctx = hs->msg_ctx;
1219 state->irpc->callid = idr_get_new(hs->msg_ctx->idr,
1220 state->irpc, UINT16_MAX);
1221 if (state->irpc->callid == -1) {
1222 tevent_req_nterror(req, NT_STATUS_INSUFFICIENT_RESOURCES);
1223 return tevent_req_post(req, ev);
1225 state->irpc->incoming.handler = irpc_bh_raw_call_incoming_handler;
1226 state->irpc->incoming.private_data = req;
1228 talloc_set_destructor(state->irpc, irpc_destructor);
1230 /* setup the header */
1231 header.uuid = hs->table->syntax_id.uuid;
1233 header.if_version = hs->table->syntax_id.if_version;
1234 header.callid = state->irpc->callid;
1235 header.callnum = state->opnum;
1237 header.status = NT_STATUS_OK;
1238 header.creds.token= hs->token;
1240 /* construct the irpc packet */
1241 ndr = ndr_push_init_ctx(state->irpc);
1242 if (tevent_req_nomem(ndr, req)) {
1243 return tevent_req_post(req, ev);
1246 ndr_err = ndr_push_irpc_header(ndr, NDR_SCALARS|NDR_BUFFERS, &header);
1247 status = ndr_map_error2ntstatus(ndr_err);
1248 if (!NT_STATUS_IS_OK(status)) {
1249 tevent_req_nterror(req, status);
1250 return tevent_req_post(req, ev);
1253 ndr_err = ndr_push_bytes(ndr, in_data, in_length);
1254 status = ndr_map_error2ntstatus(ndr_err);
1255 if (!NT_STATUS_IS_OK(status)) {
1256 tevent_req_nterror(req, status);
1257 return tevent_req_post(req, ev);
1261 state->in_packet = ndr_push_blob(ndr);
1262 status = imessaging_send(hs->msg_ctx, hs->server_id,
1263 MSG_IRPC, &state->in_packet);
1264 if (!NT_STATUS_IS_OK(status)) {
1265 tevent_req_nterror(req, status);
1266 return tevent_req_post(req, ev);
1269 if (hs->timeout != IRPC_CALL_TIMEOUT_INF) {
1270 /* set timeout-callback in case caller wants that */
1271 ok = tevent_req_set_endtime(req, ev, timeval_current_ofs(hs->timeout, 0));
1273 return tevent_req_post(req, ev);
1280 static void irpc_bh_raw_call_incoming_handler(struct irpc_request *irpc,
1281 struct irpc_message *m)
1283 struct tevent_req *req =
1284 talloc_get_type_abort(irpc->incoming.private_data,
1286 struct irpc_bh_raw_call_state *state =
1287 tevent_req_data(req,
1288 struct irpc_bh_raw_call_state);
1290 talloc_steal(state, m);
1292 if (!NT_STATUS_IS_OK(m->header.status)) {
1293 tevent_req_nterror(req, m->header.status);
1297 state->out_data = data_blob_talloc(state,
1298 m->ndr->data + m->ndr->offset,
1299 m->ndr->data_size - m->ndr->offset);
1300 if ((m->ndr->data_size - m->ndr->offset) > 0 && !state->out_data.data) {
1301 tevent_req_oom(req);
1305 tevent_req_done(req);
1308 static NTSTATUS irpc_bh_raw_call_recv(struct tevent_req *req,
1309 TALLOC_CTX *mem_ctx,
1312 uint32_t *out_flags)
1314 struct irpc_bh_raw_call_state *state =
1315 tevent_req_data(req,
1316 struct irpc_bh_raw_call_state);
1319 if (tevent_req_is_nterror(req, &status)) {
1320 tevent_req_received(req);
1324 *out_data = talloc_move(mem_ctx, &state->out_data.data);
1325 *out_length = state->out_data.length;
1327 tevent_req_received(req);
1328 return NT_STATUS_OK;
1331 struct irpc_bh_disconnect_state {
1335 static struct tevent_req *irpc_bh_disconnect_send(TALLOC_CTX *mem_ctx,
1336 struct tevent_context *ev,
1337 struct dcerpc_binding_handle *h)
1339 struct irpc_bh_state *hs = dcerpc_binding_handle_data(h,
1340 struct irpc_bh_state);
1341 struct tevent_req *req;
1342 struct irpc_bh_disconnect_state *state;
1345 req = tevent_req_create(mem_ctx, &state,
1346 struct irpc_bh_disconnect_state);
1351 ok = irpc_bh_is_connected(h);
1353 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
1354 return tevent_req_post(req, ev);
1359 tevent_req_done(req);
1360 return tevent_req_post(req, ev);
1363 static NTSTATUS irpc_bh_disconnect_recv(struct tevent_req *req)
1367 if (tevent_req_is_nterror(req, &status)) {
1368 tevent_req_received(req);
1372 tevent_req_received(req);
1373 return NT_STATUS_OK;
1376 static bool irpc_bh_ref_alloc(struct dcerpc_binding_handle *h)
1381 static const struct dcerpc_binding_handle_ops irpc_bh_ops = {
1383 .is_connected = irpc_bh_is_connected,
1384 .set_timeout = irpc_bh_set_timeout,
1385 .raw_call_send = irpc_bh_raw_call_send,
1386 .raw_call_recv = irpc_bh_raw_call_recv,
1387 .disconnect_send = irpc_bh_disconnect_send,
1388 .disconnect_recv = irpc_bh_disconnect_recv,
1390 .ref_alloc = irpc_bh_ref_alloc,
1393 /* initialise a irpc binding handle */
1394 struct dcerpc_binding_handle *irpc_binding_handle(TALLOC_CTX *mem_ctx,
1395 struct imessaging_context *msg_ctx,
1396 struct server_id server_id,
1397 const struct ndr_interface_table *table)
1399 struct dcerpc_binding_handle *h;
1400 struct irpc_bh_state *hs;
1402 h = dcerpc_binding_handle_create(mem_ctx,
1407 struct irpc_bh_state,
1412 hs->msg_ctx = msg_ctx;
1413 hs->server_id = server_id;
1415 hs->timeout = IRPC_CALL_TIMEOUT;
1417 dcerpc_binding_handle_set_sync_ev(h, msg_ctx->event.ev);
1422 struct dcerpc_binding_handle *irpc_binding_handle_by_name(TALLOC_CTX *mem_ctx,
1423 struct imessaging_context *msg_ctx,
1424 const char *dest_task,
1425 const struct ndr_interface_table *table)
1427 struct dcerpc_binding_handle *h;
1428 struct server_id *sids;
1429 struct server_id sid;
1431 /* find the server task */
1432 sids = irpc_servers_byname(msg_ctx, mem_ctx, dest_task);
1434 errno = EADDRNOTAVAIL;
1437 if (server_id_is_disconnected(&sids[0])) {
1439 errno = EADDRNOTAVAIL;
1445 h = irpc_binding_handle(mem_ctx, msg_ctx,
1454 void irpc_binding_handle_add_security_token(struct dcerpc_binding_handle *h,
1455 struct security_token *token)
1457 struct irpc_bh_state *hs =
1458 dcerpc_binding_handle_data(h,
1459 struct irpc_bh_state);