#include "includes.h"
#include "lib/events/events.h"
+#include "system/dir.h"
#include "system/filesys.h"
#include "system/time.h"
#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
struct messaging_context {
uint32_t server_id;
struct socket_context *sock;
+ const char *base_path;
const char *path;
struct dispatch_fn *dispatch;
struct messaging_rec *pending;
+ struct irpc_list *irpc;
+ struct idr_context *idr;
struct {
struct event_context *ev;
};
+static void irpc_handler(struct messaging_context *, void *,
+ uint32_t, uint32_t, DATA_BLOB *);
+
+
/*
A useful function for testing the message system.
*/
/*
return the path to a messaging socket
*/
-static char *messaging_path(TALLOC_CTX *mem_ctx, uint32_t server_id)
+static char *messaging_path(struct messaging_context *msg, uint32_t server_id)
{
- char *name = talloc_asprintf(mem_ctx, "messaging/msg.%u", (unsigned)server_id);
- char *ret;
- ret = smbd_tmp_path(mem_ctx, name);
- talloc_free(name);
- return ret;
+ return talloc_asprintf(msg, "%s/msg.%u", msg->base_path, (unsigned)server_id);
}
/*
data->data, dlength);
}
- rec->path = messaging_path(rec, server);
+ rec->path = messaging_path(msg, server);
+ talloc_steal(rec, rec->path);
+
+ if (msg->pending != NULL) {
+ status = STATUS_MORE_ENTRIES;
+ } else {
+ status = try_send(rec);
+ }
- status = try_send(rec);
if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
if (msg->pending == NULL) {
EVENT_FD_WRITEABLE(msg->event.fde);
}
- DLIST_ADD(msg->pending, rec);
+ DLIST_ADD_END(msg->pending, rec, struct messaging_rec *);
return NT_STATUS_OK;
}
mkdir(path, 0700);
talloc_free(path);
- msg->path = messaging_path(msg, server_id);
+ msg->base_path = smbd_tmp_path(msg, "messaging");
+ 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)) {
status = socket_listen(msg->sock, msg->path, 0, 50, 0);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("Unable to setup messaging listener for '%s'\n", msg->path));
+ DEBUG(0,("Unable to setup messaging listener for '%s':%s\n", msg->path, nt_errstr(status)));
talloc_free(msg);
return NULL;
}
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;
+ void *private;
+};
+
+
+/*
+ register a irpc server function
+*/
+NTSTATUS irpc_register(struct messaging_context *msg_ctx,
+ const struct dcerpc_interface_table *table,
+ int callnum, irpc_function_t fn, void *private)
+{
+ struct irpc_list *irpc;
+
+ /* override an existing handler, if any */
+ for (irpc=msg_ctx->irpc; irpc; irpc=irpc->next) {
+ if (irpc->table == table && irpc->callnum == callnum) {
+ break;
+ }
+ }
+ if (irpc == NULL) {
+ irpc = talloc(msg_ctx, struct irpc_list);
+ NT_STATUS_HAVE_NO_MEMORY(irpc);
+ DLIST_ADD(msg_ctx->irpc, irpc);
+ }
+
+ irpc->table = table;
+ irpc->callnum = callnum;
+ irpc->fn = fn;
+ irpc->private = private;
+ GUID_from_string(irpc->table->uuid, &irpc->uuid);
+
+ 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;
+ m.private = i->private;
+ 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);
+}
+
+/*
+ add a string name that this irpc server can be called on
+*/
+NTSTATUS irpc_add_name(struct messaging_context *msg_ctx, const char *name)
+{
+ return NT_STATUS_OK;
+}
+
+
git.samba.org / jelmer / samba4-debian.git / blobdiff