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"
31 #include "../lib/util/unix_privs.h"
32 #include "librpc/rpc/dcerpc.h"
33 #include "../tdb/include/tdb.h"
34 #include "../lib/util/util_tdb.h"
35 #include "cluster/cluster.h"
37 /* change the message version with any incompatible changes in the protocol */
38 #define MESSAGING_VERSION 1
40 struct messaging_context {
41 struct server_id server_id;
42 struct socket_context *sock;
43 const char *base_path;
45 struct dispatch_fn **dispatch;
47 struct idr_context *dispatch_tree;
48 struct messaging_rec *pending;
49 struct messaging_rec *retry_queue;
50 struct smb_iconv_convenience *iconv_convenience;
51 struct irpc_list *irpc;
52 struct idr_context *idr;
54 struct timeval start_time;
55 struct tevent_timer *retry_te;
57 struct tevent_context *ev;
58 struct tevent_fd *fde;
62 /* we have a linked list of dispatch handlers for each msg_type that
63 this messaging server can deal with */
65 struct dispatch_fn *next, *prev;
71 /* an individual message */
72 struct messaging_rec {
73 struct messaging_rec *next, *prev;
74 struct messaging_context *msg;
77 struct messaging_header {
80 struct server_id from;
90 static void irpc_handler(struct messaging_context *, void *,
91 uint32_t, struct server_id, DATA_BLOB *);
95 A useful function for testing the message system.
97 static void ping_message(struct messaging_context *msg, void *private_data,
98 uint32_t msg_type, struct server_id src, DATA_BLOB *data)
100 DEBUG(1,("INFO: Received PING message from server %u.%u [%.*s]\n",
101 (uint_t)src.node, (uint_t)src.id, (int)data->length,
102 data->data?(const char *)data->data:""));
103 messaging_send(msg, src, MSG_PONG, data);
107 return uptime of messaging server via irpc
109 static NTSTATUS irpc_uptime(struct irpc_message *msg,
110 struct irpc_uptime *r)
112 struct messaging_context *ctx = talloc_get_type(msg->private_data, struct messaging_context);
113 *r->out.start_time = timeval_to_nttime(&ctx->start_time);
118 return the path to a messaging socket
120 static char *messaging_path(struct messaging_context *msg, struct server_id server_id)
122 TALLOC_CTX *tmp_ctx = talloc_new(msg);
123 const char *id = cluster_id_string(tmp_ctx, server_id);
128 s = talloc_asprintf(msg, "%s/msg.%s", msg->base_path, id);
129 talloc_steal(s, tmp_ctx);
134 dispatch a fully received message
136 note that this deliberately can match more than one message handler
137 per message. That allows a single messasging context to register
138 (for example) a debug handler for more than one piece of code
140 static void messaging_dispatch(struct messaging_context *msg, struct messaging_rec *rec)
142 struct dispatch_fn *d, *next;
144 /* temporary IDs use an idtree, the rest use a array of pointers */
145 if (rec->header->msg_type >= MSG_TMP_BASE) {
146 d = (struct dispatch_fn *)idr_find(msg->dispatch_tree,
147 rec->header->msg_type);
148 } else if (rec->header->msg_type < msg->num_types) {
149 d = msg->dispatch[rec->header->msg_type];
154 for (; d; d = next) {
157 data.data = rec->packet.data + sizeof(*rec->header);
158 data.length = rec->header->length;
159 d->fn(msg, d->private_data, d->msg_type, rec->header->from, &data);
161 rec->header->length = 0;
165 handler for messages that arrive from other nodes in the cluster
167 static void cluster_message_handler(struct messaging_context *msg, DATA_BLOB packet)
169 struct messaging_rec *rec;
171 rec = talloc(msg, struct messaging_rec);
173 smb_panic("Unable to allocate messaging_rec");
177 rec->path = msg->path;
178 rec->header = (struct messaging_header *)packet.data;
179 rec->packet = packet;
182 if (packet.length != sizeof(*rec->header) + rec->header->length) {
183 DEBUG(0,("messaging: bad message header size %d should be %d\n",
184 rec->header->length, (int)(packet.length - sizeof(*rec->header))));
189 messaging_dispatch(msg, rec);
196 try to send the message
198 static NTSTATUS try_send(struct messaging_rec *rec)
200 struct messaging_context *msg = rec->msg;
204 struct socket_address *path;
206 /* rec->path is the path of the *other* socket, where we want
208 path = socket_address_from_strings(msg, msg->sock->backend_name,
211 return NT_STATUS_NO_MEMORY;
214 /* we send with privileges so messages work from any context */
215 priv = root_privileges();
216 status = socket_sendto(msg->sock, &rec->packet, &nsent, path);
224 retry backed off messages
226 static void msg_retry_timer(struct tevent_context *ev, struct tevent_timer *te,
227 struct timeval t, void *private_data)
229 struct messaging_context *msg = talloc_get_type(private_data,
230 struct messaging_context);
231 msg->retry_te = NULL;
233 /* put the messages back on the main queue */
234 while (msg->retry_queue) {
235 struct messaging_rec *rec = msg->retry_queue;
236 DLIST_REMOVE(msg->retry_queue, rec);
237 DLIST_ADD_END(msg->pending, rec, struct messaging_rec *);
240 EVENT_FD_WRITEABLE(msg->event.fde);
244 handle a socket write event
246 static void messaging_send_handler(struct messaging_context *msg)
248 while (msg->pending) {
249 struct messaging_rec *rec = msg->pending;
251 status = try_send(rec);
252 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
254 if (rec->retries > 3) {
255 /* we're getting continuous write errors -
256 backoff this record */
257 DLIST_REMOVE(msg->pending, rec);
258 DLIST_ADD_END(msg->retry_queue, rec,
259 struct messaging_rec *);
260 if (msg->retry_te == NULL) {
262 event_add_timed(msg->event.ev, msg,
263 timeval_current_ofs(1, 0),
264 msg_retry_timer, msg);
270 if (!NT_STATUS_IS_OK(status)) {
271 TALLOC_CTX *tmp_ctx = talloc_new(msg);
272 DEBUG(1,("messaging: Lost message from %s to %s of type %u - %s\n",
273 cluster_id_string(tmp_ctx, rec->header->from),
274 cluster_id_string(tmp_ctx, rec->header->to),
275 rec->header->msg_type,
277 talloc_free(tmp_ctx);
279 DLIST_REMOVE(msg->pending, rec);
282 if (msg->pending == NULL) {
283 EVENT_FD_NOT_WRITEABLE(msg->event.fde);
288 handle a new incoming packet
290 static void messaging_recv_handler(struct messaging_context *msg)
292 struct messaging_rec *rec;
297 /* see how many bytes are in the next packet */
298 status = socket_pending(msg->sock, &msize);
299 if (!NT_STATUS_IS_OK(status)) {
300 DEBUG(0,("socket_pending failed in messaging - %s\n",
305 packet = data_blob_talloc(msg, NULL, msize);
306 if (packet.data == NULL) {
307 /* assume this is temporary and retry */
311 status = socket_recv(msg->sock, packet.data, msize, &msize);
312 if (!NT_STATUS_IS_OK(status)) {
313 data_blob_free(&packet);
317 if (msize < sizeof(*rec->header)) {
318 DEBUG(0,("messaging: bad message of size %d\n", (int)msize));
319 data_blob_free(&packet);
323 rec = talloc(msg, struct messaging_rec);
325 smb_panic("Unable to allocate messaging_rec");
328 talloc_steal(rec, packet.data);
330 rec->path = msg->path;
331 rec->header = (struct messaging_header *)packet.data;
332 rec->packet = packet;
335 if (msize != sizeof(*rec->header) + rec->header->length) {
336 DEBUG(0,("messaging: bad message header size %d should be %d\n",
337 rec->header->length, (int)(msize - sizeof(*rec->header))));
342 messaging_dispatch(msg, rec);
348 handle a socket event
350 static void messaging_handler(struct tevent_context *ev, struct tevent_fd *fde,
351 uint16_t flags, void *private_data)
353 struct messaging_context *msg = talloc_get_type(private_data,
354 struct messaging_context);
355 if (flags & EVENT_FD_WRITE) {
356 messaging_send_handler(msg);
358 if (flags & EVENT_FD_READ) {
359 messaging_recv_handler(msg);
365 Register a dispatch function for a particular message type.
367 NTSTATUS messaging_register(struct messaging_context *msg, void *private_data,
368 uint32_t msg_type, msg_callback_t fn)
370 struct dispatch_fn *d;
372 /* possibly expand dispatch array */
373 if (msg_type >= msg->num_types) {
374 struct dispatch_fn **dp;
376 dp = talloc_realloc(msg, msg->dispatch, struct dispatch_fn *, msg_type+1);
377 NT_STATUS_HAVE_NO_MEMORY(dp);
379 for (i=msg->num_types;i<=msg_type;i++) {
380 msg->dispatch[i] = NULL;
382 msg->num_types = msg_type+1;
385 d = talloc_zero(msg->dispatch, struct dispatch_fn);
386 NT_STATUS_HAVE_NO_MEMORY(d);
387 d->msg_type = msg_type;
388 d->private_data = private_data;
391 DLIST_ADD(msg->dispatch[msg_type], d);
397 register a temporary message handler. The msg_type is allocated
400 NTSTATUS messaging_register_tmp(struct messaging_context *msg, void *private_data,
401 msg_callback_t fn, uint32_t *msg_type)
403 struct dispatch_fn *d;
406 d = talloc_zero(msg->dispatch, struct dispatch_fn);
407 NT_STATUS_HAVE_NO_MEMORY(d);
408 d->private_data = private_data;
411 id = idr_get_new_above(msg->dispatch_tree, d, MSG_TMP_BASE, UINT16_MAX);
414 return NT_STATUS_TOO_MANY_CONTEXT_IDS;
417 d->msg_type = (uint32_t)id;
418 (*msg_type) = d->msg_type;
424 De-register the function for a particular message type.
426 void messaging_deregister(struct messaging_context *msg, uint32_t msg_type, void *private_data)
428 struct dispatch_fn *d, *next;
430 if (msg_type >= msg->num_types) {
431 d = (struct dispatch_fn *)idr_find(msg->dispatch_tree,
434 idr_remove(msg->dispatch_tree, msg_type);
439 for (d = msg->dispatch[msg_type]; d; d = next) {
441 if (d->private_data == private_data) {
442 DLIST_REMOVE(msg->dispatch[msg_type], d);
449 Send a message to a particular server
451 NTSTATUS messaging_send(struct messaging_context *msg, struct server_id server,
452 uint32_t msg_type, DATA_BLOB *data)
454 struct messaging_rec *rec;
456 size_t dlength = data?data->length:0;
458 rec = talloc(msg, struct messaging_rec);
460 return NT_STATUS_NO_MEMORY;
463 rec->packet = data_blob_talloc(rec, NULL, sizeof(*rec->header) + dlength);
464 if (rec->packet.data == NULL) {
466 return NT_STATUS_NO_MEMORY;
471 rec->header = (struct messaging_header *)rec->packet.data;
473 ZERO_STRUCTP(rec->header);
474 rec->header->version = MESSAGING_VERSION;
475 rec->header->msg_type = msg_type;
476 rec->header->from = msg->server_id;
477 rec->header->to = server;
478 rec->header->length = dlength;
480 memcpy(rec->packet.data + sizeof(*rec->header),
481 data->data, dlength);
484 if (!cluster_node_equal(&msg->server_id, &server)) {
485 /* the destination is on another node - dispatch via
487 status = cluster_message_send(server, &rec->packet);
492 rec->path = messaging_path(msg, server);
493 talloc_steal(rec, rec->path);
495 if (msg->pending != NULL) {
496 status = STATUS_MORE_ENTRIES;
498 status = try_send(rec);
501 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
502 if (msg->pending == NULL) {
503 EVENT_FD_WRITEABLE(msg->event.fde);
505 DLIST_ADD_END(msg->pending, rec, struct messaging_rec *);
515 Send a message to a particular server, with the message containing a single pointer
517 NTSTATUS messaging_send_ptr(struct messaging_context *msg, struct server_id server,
518 uint32_t msg_type, void *ptr)
522 blob.data = (uint8_t *)&ptr;
523 blob.length = sizeof(void *);
525 return messaging_send(msg, server, msg_type, &blob);
530 destroy the messaging context
532 static int messaging_destructor(struct messaging_context *msg)
535 while (msg->names && msg->names[0]) {
536 irpc_remove_name(msg, msg->names[0]);
542 create the listening socket and setup the dispatcher
544 struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
546 struct server_id server_id,
547 struct smb_iconv_convenience *iconv_convenience,
548 struct tevent_context *ev)
550 struct messaging_context *msg;
552 struct socket_address *path;
558 msg = talloc_zero(mem_ctx, struct messaging_context);
563 /* setup a handler for messages from other cluster nodes, if appropriate */
564 status = cluster_message_init(msg, server_id, cluster_message_handler);
565 if (!NT_STATUS_IS_OK(status)) {
570 /* create the messaging directory if needed */
573 msg->base_path = talloc_reference(msg, dir);
574 msg->path = messaging_path(msg, server_id);
575 msg->server_id = server_id;
576 msg->iconv_convenience = iconv_convenience;
577 msg->idr = idr_init(msg);
578 msg->dispatch_tree = idr_init(msg);
579 msg->start_time = timeval_current();
581 status = socket_create("unix", SOCKET_TYPE_DGRAM, &msg->sock, 0);
582 if (!NT_STATUS_IS_OK(status)) {
587 /* by stealing here we ensure that the socket is cleaned up (and even
589 talloc_steal(msg, msg->sock);
591 path = socket_address_from_strings(msg, msg->sock->backend_name,
598 status = socket_listen(msg->sock, path, 50, 0);
599 if (!NT_STATUS_IS_OK(status)) {
600 DEBUG(0,("Unable to setup messaging listener for '%s':%s\n", msg->path, nt_errstr(status)));
605 /* it needs to be non blocking for sends */
606 set_blocking(socket_get_fd(msg->sock), false);
609 msg->event.fde = event_add_fd(ev, msg, socket_get_fd(msg->sock),
610 EVENT_FD_READ, messaging_handler, msg);
612 talloc_set_destructor(msg, messaging_destructor);
614 messaging_register(msg, NULL, MSG_PING, ping_message);
615 messaging_register(msg, NULL, MSG_IRPC, irpc_handler);
616 IRPC_REGISTER(msg, irpc, IRPC_UPTIME, irpc_uptime, msg);
622 A hack, for the short term until we get 'client only' messaging in place
624 struct messaging_context *messaging_client_init(TALLOC_CTX *mem_ctx,
626 struct smb_iconv_convenience *iconv_convenience,
627 struct tevent_context *ev)
631 id.id = random() % 0x10000000;
632 return messaging_init(mem_ctx, dir, id, iconv_convenience, ev);
635 a list of registered irpc server functions
638 struct irpc_list *next, *prev;
640 const struct ndr_interface_table *table;
648 register a irpc server function
650 NTSTATUS irpc_register(struct messaging_context *msg_ctx,
651 const struct ndr_interface_table *table,
652 int callnum, irpc_function_t fn, void *private_data)
654 struct irpc_list *irpc;
656 /* override an existing handler, if any */
657 for (irpc=msg_ctx->irpc; irpc; irpc=irpc->next) {
658 if (irpc->table == table && irpc->callnum == callnum) {
663 irpc = talloc(msg_ctx, struct irpc_list);
664 NT_STATUS_HAVE_NO_MEMORY(irpc);
665 DLIST_ADD(msg_ctx->irpc, irpc);
669 irpc->callnum = callnum;
671 irpc->private_data = private_data;
672 irpc->uuid = irpc->table->syntax_id.uuid;
679 handle an incoming irpc reply message
681 static void irpc_handler_reply(struct messaging_context *msg_ctx, struct irpc_message *m)
683 struct irpc_request *irpc;
684 enum ndr_err_code ndr_err;
686 irpc = (struct irpc_request *)idr_find(msg_ctx->idr, m->header.callid);
687 if (irpc == NULL) return;
689 /* parse the reply data */
690 ndr_err = irpc->table->calls[irpc->callnum].ndr_pull(m->ndr, NDR_OUT, irpc->r);
691 if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
692 irpc->status = m->header.status;
693 talloc_steal(irpc->mem_ctx, m);
695 irpc->status = ndr_map_error2ntstatus(ndr_err);
696 talloc_steal(irpc, m);
699 if (irpc->async.fn) {
700 irpc->async.fn(irpc);
707 NTSTATUS irpc_send_reply(struct irpc_message *m, NTSTATUS status)
709 struct ndr_push *push;
711 enum ndr_err_code ndr_err;
713 m->header.status = status;
715 /* setup the reply */
716 push = ndr_push_init_ctx(m->ndr, m->msg_ctx->iconv_convenience);
718 status = NT_STATUS_NO_MEMORY;
722 m->header.flags |= IRPC_FLAG_REPLY;
724 /* construct the packet */
725 ndr_err = ndr_push_irpc_header(push, NDR_SCALARS|NDR_BUFFERS, &m->header);
726 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
727 status = ndr_map_error2ntstatus(ndr_err);
731 ndr_err = m->irpc->table->calls[m->irpc->callnum].ndr_push(push, NDR_OUT, m->data);
732 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
733 status = ndr_map_error2ntstatus(ndr_err);
737 /* send the reply message */
738 packet = ndr_push_blob(push);
739 status = messaging_send(m->msg_ctx, m->from, MSG_IRPC, &packet);
740 if (!NT_STATUS_IS_OK(status)) goto failed;
748 handle an incoming irpc request message
750 static void irpc_handler_request(struct messaging_context *msg_ctx,
751 struct irpc_message *m)
755 enum ndr_err_code ndr_err;
757 for (i=msg_ctx->irpc; i; i=i->next) {
758 if (GUID_equal(&i->uuid, &m->header.uuid) &&
759 i->table->syntax_id.if_version == m->header.if_version &&
760 i->callnum == m->header.callnum) {
766 /* no registered handler for this message */
771 /* allocate space for the structure */
772 r = talloc_zero_size(m->ndr, i->table->calls[m->header.callnum].struct_size);
773 if (r == NULL) goto failed;
775 /* parse the request data */
776 ndr_err = i->table->calls[i->callnum].ndr_pull(m->ndr, NDR_IN, r);
777 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
780 m->private_data= i->private_data;
781 m->defer_reply = false;
782 m->msg_ctx = msg_ctx;
785 m->ev = msg_ctx->event.ev;
787 m->header.status = i->fn(m, r);
789 if (m->defer_reply) {
790 /* the server function has asked to defer the reply to later */
791 talloc_steal(msg_ctx, m);
795 irpc_send_reply(m, m->header.status);
803 handle an incoming irpc message
805 static void irpc_handler(struct messaging_context *msg_ctx, void *private_data,
806 uint32_t msg_type, struct server_id src, DATA_BLOB *packet)
808 struct irpc_message *m;
809 enum ndr_err_code ndr_err;
811 m = talloc(msg_ctx, struct irpc_message);
812 if (m == NULL) goto failed;
816 m->ndr = ndr_pull_init_blob(packet, m, msg_ctx->iconv_convenience);
817 if (m->ndr == NULL) goto failed;
819 m->ndr->flags |= LIBNDR_FLAG_REF_ALLOC;
821 ndr_err = ndr_pull_irpc_header(m->ndr, NDR_BUFFERS|NDR_SCALARS, &m->header);
822 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
824 if (m->header.flags & IRPC_FLAG_REPLY) {
825 irpc_handler_reply(msg_ctx, m);
827 irpc_handler_request(msg_ctx, m);
837 destroy a irpc request
839 static int irpc_destructor(struct irpc_request *irpc)
841 if (irpc->callid != -1) {
842 idr_remove(irpc->msg_ctx->idr, irpc->callid);
846 if (irpc->reject_free) {
853 timeout a irpc request
855 static void irpc_timeout(struct tevent_context *ev, struct tevent_timer *te,
856 struct timeval t, void *private_data)
858 struct irpc_request *irpc = talloc_get_type(private_data, struct irpc_request);
859 irpc->status = NT_STATUS_IO_TIMEOUT;
861 if (irpc->async.fn) {
862 irpc->async.fn(irpc);
868 make a irpc call - async send
870 struct irpc_request *irpc_call_send(struct messaging_context *msg_ctx,
871 struct server_id server_id,
872 const struct ndr_interface_table *table,
873 int callnum, void *r, TALLOC_CTX *ctx)
875 struct irpc_header header;
876 struct ndr_push *ndr;
879 struct irpc_request *irpc;
880 enum ndr_err_code ndr_err;
882 irpc = talloc(msg_ctx, struct irpc_request);
883 if (irpc == NULL) goto failed;
885 irpc->msg_ctx = msg_ctx;
887 irpc->callnum = callnum;
888 irpc->callid = idr_get_new(msg_ctx->idr, irpc, UINT16_MAX);
889 if (irpc->callid == -1) goto failed;
892 irpc->async.fn = NULL;
894 irpc->reject_free = false;
896 talloc_set_destructor(irpc, irpc_destructor);
898 /* setup the header */
899 header.uuid = table->syntax_id.uuid;
901 header.if_version = table->syntax_id.if_version;
902 header.callid = irpc->callid;
903 header.callnum = callnum;
905 header.status = NT_STATUS_OK;
907 /* construct the irpc packet */
908 ndr = ndr_push_init_ctx(irpc, msg_ctx->iconv_convenience);
909 if (ndr == NULL) goto failed;
911 ndr_err = ndr_push_irpc_header(ndr, NDR_SCALARS|NDR_BUFFERS, &header);
912 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
914 ndr_err = table->calls[callnum].ndr_push(ndr, NDR_IN, r);
915 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
918 packet = ndr_push_blob(ndr);
919 status = messaging_send(msg_ctx, server_id, MSG_IRPC, &packet);
920 if (!NT_STATUS_IS_OK(status)) goto failed;
922 event_add_timed(msg_ctx->event.ev, irpc,
923 timeval_current_ofs(IRPC_CALL_TIMEOUT, 0),
935 wait for a irpc reply
937 NTSTATUS irpc_call_recv(struct irpc_request *irpc)
941 NT_STATUS_HAVE_NO_MEMORY(irpc);
943 irpc->reject_free = true;
945 while (!irpc->done) {
946 if (event_loop_once(irpc->msg_ctx->event.ev) != 0) {
947 return NT_STATUS_CONNECTION_DISCONNECTED;
951 irpc->reject_free = false;
953 status = irpc->status;
959 perform a synchronous irpc request
961 NTSTATUS irpc_call(struct messaging_context *msg_ctx,
962 struct server_id server_id,
963 const struct ndr_interface_table *table,
964 int callnum, void *r,
967 struct irpc_request *irpc = irpc_call_send(msg_ctx, server_id,
968 table, callnum, r, mem_ctx);
969 return irpc_call_recv(irpc);
973 open the naming database
975 static struct tdb_wrap *irpc_namedb_open(struct messaging_context *msg_ctx)
978 char *path = talloc_asprintf(msg_ctx, "%s/names.tdb", msg_ctx->base_path);
982 t = tdb_wrap_open(msg_ctx, path, 0, 0, O_RDWR|O_CREAT, 0660);
989 add a string name that this irpc server can be called on
991 NTSTATUS irpc_add_name(struct messaging_context *msg_ctx, const char *name)
996 NTSTATUS status = NT_STATUS_OK;
998 t = irpc_namedb_open(msg_ctx);
999 NT_STATUS_HAVE_NO_MEMORY(t);
1001 if (tdb_lock_bystring(t->tdb, name) != 0) {
1003 return NT_STATUS_LOCK_NOT_GRANTED;
1005 rec = tdb_fetch_bystring(t->tdb, name);
1006 count = rec.dsize / sizeof(struct server_id);
1007 rec.dptr = (unsigned char *)realloc_p(rec.dptr, struct server_id, count+1);
1008 rec.dsize += sizeof(struct server_id);
1009 if (rec.dptr == NULL) {
1010 tdb_unlock_bystring(t->tdb, name);
1012 return NT_STATUS_NO_MEMORY;
1014 ((struct server_id *)rec.dptr)[count] = msg_ctx->server_id;
1015 if (tdb_store_bystring(t->tdb, name, rec, 0) != 0) {
1016 status = NT_STATUS_INTERNAL_ERROR;
1019 tdb_unlock_bystring(t->tdb, name);
1022 msg_ctx->names = str_list_add(msg_ctx->names, name);
1023 talloc_steal(msg_ctx, msg_ctx->names);
1029 return a list of server ids for a server name
1031 struct server_id *irpc_servers_byname(struct messaging_context *msg_ctx,
1032 TALLOC_CTX *mem_ctx,
1038 struct server_id *ret;
1040 t = irpc_namedb_open(msg_ctx);
1045 if (tdb_lock_bystring(t->tdb, name) != 0) {
1049 rec = tdb_fetch_bystring(t->tdb, name);
1050 if (rec.dptr == NULL) {
1051 tdb_unlock_bystring(t->tdb, name);
1055 count = rec.dsize / sizeof(struct server_id);
1056 ret = talloc_array(mem_ctx, struct server_id, count+1);
1058 tdb_unlock_bystring(t->tdb, name);
1062 for (i=0;i<count;i++) {
1063 ret[i] = ((struct server_id *)rec.dptr)[i];
1065 ret[i] = cluster_id(0, 0);
1067 tdb_unlock_bystring(t->tdb, name);
1074 remove a name from a messaging context
1076 void irpc_remove_name(struct messaging_context *msg_ctx, const char *name)
1081 struct server_id *ids;
1083 str_list_remove(msg_ctx->names, name);
1085 t = irpc_namedb_open(msg_ctx);
1090 if (tdb_lock_bystring(t->tdb, name) != 0) {
1094 rec = tdb_fetch_bystring(t->tdb, name);
1095 if (rec.dptr == NULL) {
1096 tdb_unlock_bystring(t->tdb, name);
1100 count = rec.dsize / sizeof(struct server_id);
1103 tdb_unlock_bystring(t->tdb, name);
1107 ids = (struct server_id *)rec.dptr;
1108 for (i=0;i<count;i++) {
1109 if (cluster_id_equal(&ids[i], &msg_ctx->server_id)) {
1111 memmove(ids+i, ids+i+1,
1112 sizeof(struct server_id) * (count-(i+1)));
1114 rec.dsize -= sizeof(struct server_id);
1118 tdb_store_bystring(t->tdb, name, rec, 0);
1120 tdb_unlock_bystring(t->tdb, name);
1124 struct server_id messaging_get_server_id(struct messaging_context *msg_ctx)
1126 return msg_ctx->server_id;