*/
#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_state {
- servid_t server_id;
+struct messaging_context {
+ uint32_t server_id;
struct socket_context *sock;
- char *path;
+ 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;
struct dispatch_fn *next, *prev;
uint32_t msg_type;
void *private;
- void (*fn)(void *msg_ctx, void *private,
- uint32_t msg_type, servid_t server_id, DATA_BLOB *data);
+ void (*fn)(struct messaging_context *msg, void *private,
+ uint32_t msg_type, uint32_t server_id, DATA_BLOB *data);
};
/* an individual message */
struct messaging_rec {
struct messaging_rec *next, *prev;
-
- struct messaging_state *msg;
- struct socket_context *sock;
- struct fd_event *fde;
+ struct messaging_context *msg;
const char *path;
- struct {
+ struct messaging_header {
uint32_t version;
uint32_t msg_type;
- servid_t from;
- servid_t to;
+ uint32_t from;
+ uint32_t to;
uint32_t length;
- } header;
-
- DATA_BLOB data;
+ } *header;
- uint32_t ndone;
+ DATA_BLOB packet;
};
+
+static void irpc_handler(struct messaging_context *, void *,
+ uint32_t, uint32_t, DATA_BLOB *);
+
+
/*
A useful function for testing the message system.
*/
-static void ping_message(void *msg_ctx, void *private,
- uint32_t msg_type, servid_t src, DATA_BLOB *data)
+static void ping_message(struct messaging_context *msg, void *private,
+ uint32_t msg_type, uint32_t src, DATA_BLOB *data)
{
DEBUG(1,("INFO: Received PING message from server %u [%.*s]\n",
(uint_t)src, data->length, data->data?(const char *)data->data:""));
- messaging_send(msg_ctx, src, MSG_PONG, data);
+ messaging_send(msg, src, MSG_PONG, data);
}
/*
return the path to a messaging socket
*/
-static char *messaging_path(TALLOC_CTX *mem_ctx, servid_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 = lock_path(mem_ctx, name);
- talloc_free(name);
- return ret;
+ return talloc_asprintf(msg, "%s/msg.%u", msg->base_path, (unsigned)server_id);
}
/*
dispatch a fully received message
*/
-static void messaging_dispatch(struct messaging_state *msg, struct messaging_rec *rec)
+static void messaging_dispatch(struct messaging_context *msg, struct messaging_rec *rec)
{
- struct dispatch_fn *d;
- for (d=msg->dispatch;d;d=d->next) {
- if (d->msg_type == rec->header.msg_type) {
- d->fn(msg, d->private, d->msg_type, rec->header.from, &rec->data);
+ struct dispatch_fn *d, *next;
+ for (d=msg->dispatch;d;d=next) {
+ next = d->next;
+ if (d->msg_type == rec->header->msg_type) {
+ DATA_BLOB data;
+ data.data = rec->packet.data + sizeof(*rec->header);
+ data.length = rec->header->length;
+ d->fn(msg, d->private, d->msg_type, rec->header->from, &data);
}
}
-
- /* we don't free the record itself here as there may
- be more messages from this client */
- data_blob_free(&rec->data);
- rec->header.length = 0;
- rec->ndone = 0;
+ rec->header->length = 0;
}
/*
- handle IO for a single message
+ try to send the message
*/
-static void messaging_recv_handler(struct event_context *ev, struct fd_event *fde,
- time_t t, uint16_t flags)
+static NTSTATUS try_send(struct messaging_rec *rec)
{
- struct messaging_rec *rec = fde->private;
- struct messaging_state *msg = rec->msg;
+ struct messaging_context *msg = rec->msg;
+ size_t nsent;
+ void *priv;
NTSTATUS status;
- if (rec->ndone < sizeof(rec->header)) {
- /* receive the header */
- DATA_BLOB blob;
- blob.length = 0;
- status = socket_recv(rec->sock, rec,
- &blob, sizeof(rec->header) - rec->ndone, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
-
- if (blob.length == 0) {
- return;
- }
-
- memcpy(rec->ndone + (char *)&rec->header, blob.data, blob.length);
- rec->ndone += blob.length;
- data_blob_free(&blob);
-
- if (rec->ndone == sizeof(rec->header)) {
- if (rec->header.version != MESSAGING_VERSION) {
- DEBUG(0,("meessage with wrong version %u\n",
- rec->header.version));
- talloc_free(rec);
- }
- rec->data = data_blob_talloc(rec, NULL, rec->header.length);
- if (rec->data.length != rec->header.length) {
- DEBUG(0,("Unable to allocate message of size %u\n",
- rec->header.length));
- talloc_free(rec);
- }
- }
- }
+ /* we send with privileges so messages work from any context */
+ priv = root_privileges();
+ status = socket_sendto(msg->sock, &rec->packet, &nsent, 0, rec->path, 0);
+ talloc_free(priv);
- if (rec->ndone >= sizeof(rec->header) &&
- rec->ndone < sizeof(rec->header) + rec->header.length) {
- /* receive the body, if any */
- DATA_BLOB blob;
- blob.length = 0;
- status = socket_recv(rec->sock, rec,
- &blob, sizeof(rec->header) + rec->header.length - rec->ndone, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
-
- if (blob.length == 0) {
- return;
- }
-
- memcpy(rec->data.data + (rec->ndone - sizeof(rec->header)),
- blob.data, blob.length);
-
- rec->ndone += blob.length;
- }
-
- if (rec->ndone == sizeof(rec->header) + rec->header.length) {
- /* we've got the whole message */
- messaging_dispatch(msg, rec);
- }
+ return status;
}
/*
- destroy a messaging record
+ handle a socket write event
*/
-static int rec_destructor(void *ptr)
+static void messaging_send_handler(struct messaging_context *msg)
{
- struct messaging_rec *rec = ptr;
- struct messaging_state *msg = rec->msg;
- event_remove_fd(msg->event.ev, rec->fde);
- return 0;
+ while (msg->pending) {
+ struct messaging_rec *rec = msg->pending;
+ NTSTATUS status;
+ status = try_send(rec);
+ if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
+ break;
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1,("messaging: Lost message from %u to %u of type %u - %s\n",
+ rec->header->from, rec->header->to, rec->header->msg_type,
+ nt_errstr(status)));
+ }
+ DLIST_REMOVE(msg->pending, rec);
+ talloc_free(rec);
+ }
+ if (msg->pending == NULL) {
+ EVENT_FD_NOT_WRITEABLE(msg->event.fde);
+ }
}
/*
- handle a new incoming connection
+ handle a new incoming packet
*/
-static void messaging_listen_handler(struct event_context *ev, struct fd_event *fde,
- time_t t, uint16_t flags)
+static void messaging_recv_handler(struct messaging_context *msg)
{
- struct messaging_state *msg = fde->private;
struct messaging_rec *rec;
NTSTATUS status;
- struct fd_event fde2;
+ DATA_BLOB packet;
+ size_t msize;
+
+ /* see how many bytes are in the next packet */
+ status = socket_pending(msg->sock, &msize);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("socket_pending failed in messaging - %s\n",
+ nt_errstr(status)));
+ return;
+ }
+
+ packet = data_blob_talloc(msg, NULL, msize);
+ if (packet.data == NULL) {
+ /* assume this is temporary and retry */
+ return;
+ }
+
+ status = socket_recv(msg->sock, packet.data, msize, &msize, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ data_blob_free(&packet);
+ return;
+ }
- rec = talloc_p(msg, struct messaging_rec);
+ if (msize < sizeof(*rec->header)) {
+ DEBUG(0,("messaging: bad message of size %d\n", msize));
+ data_blob_free(&packet);
+ return;
+ }
+
+ rec = talloc(msg, struct messaging_rec);
if (rec == NULL) {
smb_panic("Unable to allocate messaging_rec");
}
- status = socket_accept(msg->sock, &rec->sock, 0);
- if (!NT_STATUS_IS_OK(status)) {
- smb_panic("Unable to accept messaging_rec");
- }
- talloc_steal(rec, rec->sock);
+ talloc_steal(rec, packet.data);
+ rec->msg = msg;
+ rec->path = msg->path;
+ rec->header = (struct messaging_header *)packet.data;
+ rec->packet = packet;
- rec->msg = msg;
- rec->ndone = 0;
- rec->header.length = 0;
- rec->path = msg->path;
+ if (msize != sizeof(*rec->header) + rec->header->length) {
+ DEBUG(0,("messaging: bad message header size %d should be %d\n",
+ rec->header->length, msize - sizeof(*rec->header)));
+ talloc_free(rec);
+ return;
+ }
- fde2.private = rec;
- fde2.fd = socket_get_fd(rec->sock);
- fde2.flags = EVENT_FD_READ;
- fde2.handler = messaging_recv_handler;
+ messaging_dispatch(msg, rec);
+ talloc_free(rec);
+}
- rec->fde = event_add_fd(msg->event.ev, &fde2);
- talloc_set_destructor(rec, rec_destructor);
+/*
+ handle a socket event
+*/
+static void messaging_handler(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *private)
+{
+ struct messaging_context *msg = talloc_get_type(private,
+ struct messaging_context);
+ if (flags & EVENT_FD_WRITE) {
+ messaging_send_handler(msg);
+ }
+ if (flags & EVENT_FD_READ) {
+ messaging_recv_handler(msg);
+ }
}
+
/*
Register a dispatch function for a particular message type.
*/
-void messaging_register(void *ctx, void *private,
+void messaging_register(struct messaging_context *msg, void *private,
uint32_t msg_type,
- void (*fn)(void *, void *, uint32_t, servid_t, DATA_BLOB *))
+ void (*fn)(struct messaging_context *, void *, uint32_t, uint32_t, DATA_BLOB *))
{
- struct messaging_state *msg = ctx;
struct dispatch_fn *d;
- d = talloc_p(msg, struct dispatch_fn);
+ d = talloc(msg, struct dispatch_fn);
d->msg_type = msg_type;
d->private = private;
d->fn = fn;
/*
De-register the function for a particular message type.
*/
-void messaging_deregister(void *ctx, uint32_t msg_type)
+void messaging_deregister(struct messaging_context *msg, uint32_t msg_type, void *private)
{
- struct messaging_state *msg = ctx;
struct dispatch_fn *d, *next;
for (d = msg->dispatch; d; d = next) {
next = d->next;
- if (d->msg_type == msg_type) {
+ if (d->msg_type == msg_type &&
+ d->private == private) {
DLIST_REMOVE(msg->dispatch, d);
talloc_free(d);
}
}
-
-/*
- handle IO for sending a message
-*/
-static void messaging_send_handler(struct event_context *ev, struct fd_event *fde,
- time_t t, uint16_t flags)
-{
- struct messaging_rec *rec = fde->private;
- NTSTATUS status;
-
- if (rec->ndone < sizeof(rec->header)) {
- /* send the header */
- size_t nsent;
- DATA_BLOB blob;
-
- blob.data = rec->ndone + (char *)&rec->header;
- blob.length = sizeof(rec->header) - rec->ndone;
-
- status = socket_send(rec->sock, rec, &blob, &nsent, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
-
- if (nsent == 0) {
- return;
- }
-
- rec->ndone += nsent;
- }
-
- if (rec->ndone >= sizeof(rec->header) &&
- rec->ndone < sizeof(rec->header) + rec->header.length) {
- /* send the body, if any */
- DATA_BLOB blob;
- size_t nsent;
-
- blob.data = rec->data.data + (rec->ndone - sizeof(rec->header));
- blob.length = rec->header.length - (rec->ndone - sizeof(rec->header));
-
- status = socket_send(rec->sock, rec, &blob, &nsent, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
-
- rec->ndone += nsent;
- }
-
- if (rec->ndone == sizeof(rec->header) + rec->header.length) {
- /* we've done the whole message */
- talloc_free(rec);
- }
-}
-
-
/*
Send a message to a particular server
*/
-NTSTATUS messaging_send(void *msg_ctx, servid_t server, uint32_t msg_type, DATA_BLOB *data)
+NTSTATUS messaging_send(struct messaging_context *msg, uint32_t server,
+ uint32_t msg_type, DATA_BLOB *data)
{
- struct messaging_state *msg = msg_ctx;
struct messaging_rec *rec;
NTSTATUS status;
- struct fd_event fde;
+ size_t dlength = data?data->length:0;
- rec = talloc_p(msg, struct messaging_rec);
+ rec = talloc(msg, struct messaging_rec);
if (rec == NULL) {
return NT_STATUS_NO_MEMORY;
}
- rec->msg = msg;
- rec->header.version = MESSAGING_VERSION;
- rec->header.msg_type = msg_type;
- rec->header.from = msg->server_id;
- rec->header.to = server;
- rec->header.length = data?data->length:0;
- if (rec->header.length != 0) {
- rec->data = data_blob_talloc(rec, data->data, data->length);
- } else {
- rec->data = data_blob(NULL, 0);
+ rec->packet = data_blob_talloc(rec, NULL, sizeof(*rec->header) + dlength);
+ if (rec->packet.data == NULL) {
+ talloc_free(rec);
+ return NT_STATUS_NO_MEMORY;
}
- rec->ndone = 0;
- status = socket_create("unix", SOCKET_TYPE_STREAM, &rec->sock, 0);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(rec);
- return status;
+ rec->msg = msg;
+ rec->header = (struct messaging_header *)rec->packet.data;
+ rec->header->version = MESSAGING_VERSION;
+ rec->header->msg_type = msg_type;
+ rec->header->from = msg->server_id;
+ rec->header->to = server;
+ rec->header->length = dlength;
+ if (dlength != 0) {
+ memcpy(rec->packet.data + sizeof(*rec->header),
+ data->data, dlength);
}
- talloc_steal(rec, rec->sock);
- rec->path = messaging_path(rec, server);
+ rec->path = messaging_path(msg, server);
+ talloc_steal(rec, rec->path);
- status = socket_connect(rec->sock, NULL, 0, rec->path, 0, 0);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(rec);
- return status;
+ if (msg->pending != NULL) {
+ status = STATUS_MORE_ENTRIES;
+ } else {
+ status = try_send(rec);
+ }
+
+ if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
+ if (msg->pending == NULL) {
+ EVENT_FD_WRITEABLE(msg->event.fde);
+ }
+ DLIST_ADD_END(msg->pending, rec, struct messaging_rec *);
+ return NT_STATUS_OK;
}
- fde.private = rec;
- fde.fd = socket_get_fd(rec->sock);
- fde.flags = EVENT_FD_WRITE;
- fde.handler = messaging_send_handler;
+ talloc_free(rec);
- rec->fde = event_add_fd(msg->event.ev, &fde);
+ return status;
+}
- talloc_set_destructor(rec, rec_destructor);
+/*
+ Send a message to a particular server, with the message containing a single pointer
+*/
+NTSTATUS messaging_send_ptr(struct messaging_context *msg, uint32_t server,
+ uint32_t msg_type, void *ptr)
+{
+ DATA_BLOB blob;
- messaging_send_handler(msg->event.ev, rec->fde, 0, EVENT_FD_WRITE);
+ blob.data = (void *)&ptr;
+ blob.length = sizeof(void *);
- return NT_STATUS_OK;
+ return messaging_send(msg, server, msg_type, &blob);
}
/*
destroy the messaging context
*/
-static int messaging_destructor(void *msg_ctx)
+static int messaging_destructor(void *ptr)
{
- struct messaging_state *msg = msg_ctx;
- event_remove_fd(msg->event.ev, msg->event.fde);
+ struct messaging_context *msg = ptr;
+ unlink(msg->path);
return 0;
}
/*
create the listening socket and setup the dispatcher
*/
-void *messaging_init(TALLOC_CTX *mem_ctx, servid_t server_id, struct event_context *ev)
+struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, uint32_t server_id,
+ struct event_context *ev)
{
- struct messaging_state *msg;
+ struct messaging_context *msg;
NTSTATUS status;
- struct fd_event fde;
+ char *path;
- msg = talloc_p(mem_ctx, struct messaging_state);
+ msg = talloc(mem_ctx, struct messaging_context);
if (msg == NULL) {
return NULL;
}
/* create the messaging directory if needed */
- msg->path = lock_path(msg, "messaging");
- mkdir(msg->path, 0700);
- talloc_free(msg->path);
+ path = smbd_tmp_path(msg, "messaging");
+ mkdir(path, 0700);
+ talloc_free(path);
+ msg->base_path = smbd_tmp_path(msg, "messaging");
+ msg->path = messaging_path(msg, server_id);
msg->server_id = server_id;
- msg->dispatch = NULL;
- msg->path = messaging_path(msg, server_id);
+ msg->dispatch = NULL;
+ msg->pending = NULL;
+ msg->idr = idr_init(msg);
+ msg->irpc = NULL;
- status = socket_create("unix", SOCKET_TYPE_STREAM, &msg->sock, 0);
+ status = socket_create("unix", SOCKET_TYPE_DGRAM, &msg->sock, 0);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(msg);
return NULL;
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;
}
- fde.private = msg;
- fde.fd = socket_get_fd(msg->sock);
- fde.flags = EVENT_FD_READ;
- fde.handler = messaging_listen_handler;
+ /* it needs to be non blocking for sends */
+ set_blocking(socket_get_fd(msg->sock), False);
- msg->event.ev = ev;
- msg->event.fde = event_add_fd(ev, &fde);
+ msg->event.ev = talloc_reference(msg, ev);
+ msg->event.fde = event_add_fd(ev, msg, socket_get_fd(msg->sock),
+ EVENT_FD_READ, messaging_handler, msg);
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