/*
- Unix SMB/Netbios implementation.
- Version 3.0
+ Unix SMB/CIFS implementation.
messages.c header
Copyright (C) Andrew Tridgell 2000
-
+ Copyright (C) 2001, 2002 by Martin Pool
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _MESSAGES_H_
#define _MESSAGES_H_
-/* general messages */
-#define MSG_DEBUG 1
-#define MSG_PING 2
+/* change the message version with any incompatible changes in the protocol */
+#define MESSAGE_VERSION 2
+
+/*
+ * Special flags passed to message_send. Allocated from the top, lets see when
+ * it collides with the message types in the lower 16 bits :-)
+ */
+
+/*
+ * Under high load, this message can be dropped. Use for notify-style
+ * messages that are not critical for correct operation.
+ */
+#define MSG_FLAG_LOWPRIORITY 0x80000000
+
+
+/* Flags to classify messages - used in message_send_all() */
+/* Sender will filter by flag. */
+
+#define FLAG_MSG_GENERAL 0x0001
+#define FLAG_MSG_SMBD 0x0002
+#define FLAG_MSG_NMBD 0x0004
+#define FLAG_MSG_WINBIND 0x0008
+#define FLAG_MSG_PRINT_GENERAL 0x0010
+/* dbwrap messages 4001-4999 */
+#define FLAG_MSG_DBWRAP 0x0020
+
+/*
+ * ctdb gives us 64-bit server ids for messaging_send. This is done to avoid
+ * pid clashes and to be able to register for special messages like "all
+ * smbds".
+ *
+ * Normal individual server id's have the upper 32 bits to 0, I picked "1" for
+ * Samba, other subsystems might use something else.
+ */
+
+#define MSG_SRVID_SAMBA 0x0000000100000000LL
+
+#include "librpc/gen_ndr/server_id.h"
+
+#ifdef CLUSTER_SUPPORT
+#define MSG_BROADCAST_PID_STR "0:0"
+#else
+#define MSG_BROADCAST_PID_STR "0"
+#endif
+
+struct messaging_context;
+struct messaging_rec;
+
+/*
+ * struct messaging_context belongs to messages.c, but because we still have
+ * messaging_dispatch, we need it here. Once we get rid of signals for
+ * notifying processes, this will go.
+ */
+
+struct messaging_context {
+ struct server_id id;
+ struct event_context *event_ctx;
+ struct messaging_callback *callbacks;
+
+ struct messaging_backend *local;
+ struct messaging_backend *remote;
+};
+
+struct messaging_backend {
+ NTSTATUS (*send_fn)(struct messaging_context *msg_ctx,
+ struct server_id pid, int msg_type,
+ const DATA_BLOB *data,
+ struct messaging_backend *backend);
+ void *private_data;
+};
+
+NTSTATUS messaging_tdb_init(struct messaging_context *msg_ctx,
+ TALLOC_CTX *mem_ctx,
+ struct messaging_backend **presult);
+
+bool messaging_tdb_parent_init(TALLOC_CTX *mem_ctx);
+
+void *messaging_tdb_event(TALLOC_CTX *mem_ctx, struct messaging_context *msg,
+ struct tevent_context *ev);
+
+NTSTATUS messaging_ctdbd_init(struct messaging_context *msg_ctx,
+ TALLOC_CTX *mem_ctx,
+ struct messaging_backend **presult);
+struct ctdbd_connection *messaging_ctdbd_connection(void);
+
+bool message_send_all(struct messaging_context *msg_ctx,
+ int msg_type,
+ const void *buf, size_t len,
+ int *n_sent);
+struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx,
+ struct event_context *ev);
+
+struct server_id messaging_server_id(const struct messaging_context *msg_ctx);
+
+/*
+ * re-init after a fork
+ */
+NTSTATUS messaging_reinit(struct messaging_context *msg_ctx);
+
+NTSTATUS messaging_register(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ void (*fn)(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data));
+void messaging_deregister(struct messaging_context *ctx, uint32_t msg_type,
+ void *private_data);
+NTSTATUS messaging_send(struct messaging_context *msg_ctx,
+ struct server_id server,
+ uint32_t msg_type, const DATA_BLOB *data);
+
+NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx,
+ struct server_id server, uint32_t msg_type,
+ const uint8 *buf, size_t len);
+void messaging_dispatch_rec(struct messaging_context *msg_ctx,
+ struct messaging_rec *rec);
-/* nmbd messages */
-#define MSG_FORCE_ELECTION 1001
+#include "librpc/gen_ndr/ndr_messaging.h"
#endif
git.samba.org / kai / samba.git / blobdiff