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-rw-r--r--source4/lib/messaging/config.mk3
-rw-r--r--source4/lib/messaging/irpc.h94
-rw-r--r--source4/lib/messaging/messaging.c283
3 files changed, 378 insertions, 2 deletions
diff --git a/source4/lib/messaging/config.mk b/source4/lib/messaging/config.mk
index 6c30894779..ef0ea7e6f4 100644
--- a/source4/lib/messaging/config.mk
+++ b/source4/lib/messaging/config.mk
@@ -4,5 +4,8 @@
[SUBSYSTEM::MESSAGING]
INIT_OBJ_FILES = \
lib/messaging/messaging.o
+NOPROTO = YES
+REQUIRED_SUBSYSTEMS = \
+ NDR_IRPC
# End SUBSYSTEM MESSAGING
################################################
diff --git a/source4/lib/messaging/irpc.h b/source4/lib/messaging/irpc.h
new file mode 100644
index 0000000000..a483c78c70
--- /dev/null
+++ b/source4/lib/messaging/irpc.h
@@ -0,0 +1,94 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Samba internal rpc code - header
+
+ Copyright (C) Andrew Tridgell 2005
+
+ 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
+ (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.
+*/
+
+/*
+ an incoming irpc message
+*/
+struct irpc_message {
+ uint32_t from;
+};
+
+/* don't allow calls to take too long */
+#define IRPC_CALL_TIMEOUT 10
+
+
+/* the server function type */
+typedef NTSTATUS (*irpc_function_t)(struct irpc_message *, void *r);
+
+/* register a server function with the irpc messaging system */
+#define IRPC_REGISTER(msg_ctx, pipename, funcname, function) \
+ irpc_register(msg_ctx, &dcerpc_table_ ## pipename, \
+ DCERPC_ ## funcname, \
+ (irpc_function_t)function)
+
+/* make a irpc call */
+#define IRPC_CALL(msg_ctx, server_id, pipename, funcname, ptr) \
+ irpc_call(msg_ctx, server_id, &dcerpc_table_ ## pipename, DCERPC_ ## funcname, ptr)
+
+
+/*
+ a pending irpc call
+*/
+struct irpc_request {
+ struct messaging_context *msg_ctx;
+ const struct dcerpc_interface_table *table;
+ int callnum;
+ int callid;
+ void *r;
+ NTSTATUS status;
+ BOOL done;
+ struct {
+ void (*fn)(struct irpc_request *);
+ void *private;
+ } async;
+};
+
+
+struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, uint32_t server_id,
+ struct event_context *ev);
+NTSTATUS messaging_send(struct messaging_context *msg, uint32_t server,
+ uint32_t msg_type, DATA_BLOB *data);
+void messaging_register(struct messaging_context *msg, void *private,
+ uint32_t msg_type,
+ void (*fn)(struct messaging_context *, void *, uint32_t, uint32_t, DATA_BLOB *));
+struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, uint32_t server_id,
+ struct event_context *ev);
+NTSTATUS messaging_send_ptr(struct messaging_context *msg, uint32_t server,
+ uint32_t msg_type, void *ptr);
+void messaging_deregister(struct messaging_context *msg, uint32_t msg_type, void *private);
+
+
+
+
+NTSTATUS irpc_register(struct messaging_context *msg_ctx,
+ const struct dcerpc_interface_table *table,
+ int call, irpc_function_t fn);
+struct irpc_request *irpc_call_send(struct messaging_context *msg_ctx,
+ uint32_t server_id,
+ const struct dcerpc_interface_table *table,
+ int callnum, void *r);
+NTSTATUS irpc_call_recv(struct irpc_request *irpc);
+NTSTATUS irpc_call(struct messaging_context *msg_ctx,
+ uint32_t server_id,
+ const struct dcerpc_interface_table *table,
+ int callnum, void *r);
+
diff --git a/source4/lib/messaging/messaging.c b/source4/lib/messaging/messaging.c
index 936e3b9515..b605fa0494 100644
--- a/source4/lib/messaging/messaging.c
+++ b/source4/lib/messaging/messaging.c
@@ -27,6 +27,8 @@
#include "messages.h"
#include "dlinklist.h"
#include "lib/socket/socket.h"
+#include "librpc/gen_ndr/ndr_irpc.h"
+#include "lib/messaging/irpc.h"
/* change the message version with any incompatible changes in the protocol */
#define MESSAGING_VERSION 1
@@ -37,6 +39,8 @@ struct messaging_context {
const char *path;
struct dispatch_fn *dispatch;
struct messaging_rec *pending;
+ struct irpc_list *irpc;
+ struct idr_context *idr;
struct {
struct event_context *ev;
@@ -72,6 +76,10 @@ struct messaging_rec {
};
+static void irpc_handler(struct messaging_context *, void *,
+ uint32_t, uint32_t, DATA_BLOB *);
+
+
/*
A useful function for testing the message system.
*/
@@ -363,8 +371,10 @@ struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, uint32_t server_id
msg->path = messaging_path(msg, server_id);
msg->server_id = server_id;
- msg->dispatch = NULL;
- msg->pending = NULL;
+ msg->dispatch = NULL;
+ msg->pending = NULL;
+ msg->idr = idr_init(msg);
+ msg->irpc = NULL;
status = socket_create("unix", SOCKET_TYPE_DGRAM, &msg->sock, 0);
if (!NT_STATUS_IS_OK(status)) {
@@ -393,6 +403,275 @@ struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, uint32_t server_id
talloc_set_destructor(msg, messaging_destructor);
messaging_register(msg, NULL, MSG_PING, ping_message);
+ messaging_register(msg, NULL, MSG_IRPC, irpc_handler);
return msg;
}
+
+
+/*
+ a list of registered irpc server functions
+*/
+struct irpc_list {
+ struct irpc_list *next, *prev;
+ struct GUID uuid;
+ const struct dcerpc_interface_table *table;
+ int callnum;
+ irpc_function_t fn;
+};
+
+
+/*
+ register a irpc server function
+*/
+NTSTATUS irpc_register(struct messaging_context *msg_ctx,
+ const struct dcerpc_interface_table *table,
+ int call, irpc_function_t fn)
+{
+ struct irpc_list *irpc;
+
+ irpc = talloc(msg_ctx, struct irpc_list);
+ NT_STATUS_HAVE_NO_MEMORY(irpc);
+
+ irpc->table = table;
+ irpc->callnum = call;
+ irpc->fn = fn;
+ GUID_from_string(irpc->table->uuid, &irpc->uuid);
+
+ DLIST_ADD(msg_ctx->irpc, irpc);
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ handle an incoming irpc reply message
+*/
+static void irpc_handler_reply(struct messaging_context *msg_ctx,
+ struct ndr_pull *ndr, struct irpc_header *header)
+{
+ struct irpc_request *irpc;
+
+ irpc = idr_find(msg_ctx->idr, header->callid);
+ if (irpc == NULL) return;
+
+ /* parse the reply data */
+ irpc->status = irpc->table->calls[irpc->callnum].ndr_pull(ndr, NDR_OUT, irpc->r);
+ if (NT_STATUS_IS_OK(irpc->status)) {
+ irpc->status = header->status;
+ }
+ irpc->done = True;
+ if (irpc->async.fn) {
+ irpc->async.fn(irpc);
+ }
+}
+
+
+/*
+ handle an incoming irpc request message
+*/
+static void irpc_handler_request(struct messaging_context *msg_ctx,
+ struct ndr_pull *ndr, struct irpc_header *header,
+ uint32_t src)
+{
+ struct irpc_list *i;
+ void *r;
+ NTSTATUS status;
+ struct irpc_message m;
+ struct ndr_push *push;
+ DATA_BLOB packet;
+
+ for (i=msg_ctx->irpc; i; i=i->next) {
+ if (GUID_equal(&i->uuid, &header->uuid) &&
+ i->table->if_version == header->if_version &&
+ i->callnum == header->callnum) {
+ break;
+ }
+ }
+
+ if (i == NULL) {
+ /* no registered handler for this message */
+ return;
+ }
+
+ /* allocate space for the structure */
+ r = talloc_zero_size(ndr, i->table->calls[header->callnum].struct_size);
+ if (r == NULL) goto failed;
+
+ /* parse the request data */
+ status = i->table->calls[i->callnum].ndr_pull(ndr, NDR_IN, r);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ /* make the call */
+ m.from = src;
+ header->status = i->fn(&m, r);
+
+ /* setup the reply */
+ push = ndr_push_init_ctx(ndr);
+ if (push == NULL) goto failed;
+
+ header->flags |= IRPC_FLAG_REPLY;
+
+ /* construct the packet */
+ status = ndr_push_irpc_header(push, NDR_SCALARS|NDR_BUFFERS, header);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ status = i->table->calls[i->callnum].ndr_push(push, NDR_OUT, r);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ /* send the reply message */
+ packet = ndr_push_blob(push);
+ status = messaging_send(msg_ctx, src, MSG_IRPC, &packet);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+failed:
+ /* nothing to clean up */
+ return;
+}
+
+/*
+ handle an incoming irpc message
+*/
+static void irpc_handler(struct messaging_context *msg_ctx, void *private,
+ uint32_t msg_type, uint32_t src, DATA_BLOB *packet)
+{
+ struct irpc_header header;
+ struct ndr_pull *ndr;
+ NTSTATUS status;
+
+ ndr = ndr_pull_init_blob(packet, msg_ctx);
+ if (ndr == NULL) goto failed;
+
+ status = ndr_pull_irpc_header(ndr, NDR_BUFFERS|NDR_SCALARS, &header);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ if (header.flags & IRPC_FLAG_REPLY) {
+ irpc_handler_reply(msg_ctx, ndr, &header);
+ } else {
+ irpc_handler_request(msg_ctx, ndr, &header, src);
+ }
+
+failed:
+ talloc_free(ndr);
+}
+
+
+/*
+ destroy a irpc request
+*/
+static int irpc_destructor(void *ptr)
+{
+ struct irpc_request *irpc = talloc_get_type(ptr, struct irpc_request);
+ idr_remove(irpc->msg_ctx->idr, irpc->callid);
+ return 0;
+}
+
+/*
+ timeout a irpc request
+*/
+static void irpc_timeout(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private)
+{
+ struct irpc_request *irpc = talloc_get_type(private, struct irpc_request);
+ irpc->status = NT_STATUS_IO_TIMEOUT;
+ irpc->done = True;
+ if (irpc->async.fn) {
+ irpc->async.fn(irpc);
+ }
+}
+
+
+/*
+ make a irpc call - async send
+*/
+struct irpc_request *irpc_call_send(struct messaging_context *msg_ctx,
+ uint32_t server_id,
+ const struct dcerpc_interface_table *table,
+ int callnum, void *r)
+{
+ struct irpc_header header;
+ struct ndr_push *ndr;
+ NTSTATUS status;
+ DATA_BLOB packet;
+ struct irpc_request *irpc;
+
+ irpc = talloc(msg_ctx, struct irpc_request);
+ if (irpc == NULL) goto failed;
+
+ irpc->msg_ctx = msg_ctx;
+ irpc->table = table;
+ irpc->callnum = callnum;
+ irpc->callid = idr_get_new(msg_ctx->idr, irpc, UINT16_MAX);
+ if (irpc->callid == -1) goto failed;
+ irpc->r = r;
+ irpc->done = False;
+ irpc->async.fn = NULL;
+
+ talloc_set_destructor(irpc, irpc_destructor);
+
+ /* setup the header */
+ status = GUID_from_string(table->uuid, &header.uuid);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ header.if_version = table->if_version;
+ header.callid = irpc->callid;
+ header.callnum = callnum;
+ header.flags = 0;
+ header.status = NT_STATUS_OK;
+
+ /* construct the irpc packet */
+ ndr = ndr_push_init_ctx(irpc);
+ if (ndr == NULL) goto failed;
+
+ status = ndr_push_irpc_header(ndr, NDR_SCALARS|NDR_BUFFERS, &header);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ status = table->calls[callnum].ndr_push(ndr, NDR_IN, r);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ /* and send it */
+ packet = ndr_push_blob(ndr);
+ status = messaging_send(msg_ctx, server_id, MSG_IRPC, &packet);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ event_add_timed(msg_ctx->event.ev, irpc,
+ timeval_current_ofs(IRPC_CALL_TIMEOUT, 0),
+ irpc_timeout, irpc);
+
+ talloc_free(ndr);
+ return irpc;
+
+failed:
+ talloc_free(irpc);
+ return NULL;
+}
+
+/*
+ wait for a irpc reply
+*/
+NTSTATUS irpc_call_recv(struct irpc_request *irpc)
+{
+ NTSTATUS status;
+ NT_STATUS_HAVE_NO_MEMORY(irpc);
+ while (!irpc->done) {
+ if (event_loop_once(irpc->msg_ctx->event.ev) != 0) {
+ return NT_STATUS_CONNECTION_DISCONNECTED;
+ }
+ }
+ status = irpc->status;
+ talloc_free(irpc);
+ return status;
+}
+
+/*
+ perform a synchronous irpc request
+*/
+NTSTATUS irpc_call(struct messaging_context *msg_ctx,
+ uint32_t server_id,
+ const struct dcerpc_interface_table *table,
+ int callnum, void *r)
+{
+ struct irpc_request *irpc = irpc_call_send(msg_ctx, server_id,
+ table, callnum, r);
+ return irpc_call_recv(irpc);
+}
generated by cgit (git 2.34.1) at 2024-12-21 02:56:09 +0000