*/
#include "includes.h"
-#include "events.h"
-#include "system/time.h"
-#include "messages.h"
+#include "lib/events/events.h"
+#include "system/filesys.h"
+#include "messaging/messaging.h"
#include "dlinklist.h"
+#include "lib/socket/socket.h"
+#include "librpc/gen_ndr/ndr_irpc.h"
+#include "lib/messaging/irpc.h"
+#include "db_wrap.h"
+#include "lib/tdb/include/tdbutil.h"
+#include "lib/util/unix_privs.h"
+#include "librpc/rpc/dcerpc.h"
/* change the message version with any incompatible changes in the protocol */
#define MESSAGING_VERSION 1
struct messaging_context {
- servid_t server_id;
+ uint32_t server_id;
struct socket_context *sock;
- char *path;
- struct dispatch_fn *dispatch;
+ const char *base_path;
+ const char *path;
+ struct dispatch_fn **dispatch;
+ uint32_t num_types;
+ struct idr_context *dispatch_tree;
+ struct messaging_rec *pending;
+ struct irpc_list *irpc;
+ struct idr_context *idr;
+ const char **names;
+ struct timeval start_time;
struct {
struct event_context *ev;
} event;
};
-/* we have a linked list of dispatch handlers that this messaging
- server can deal with */
+/* we have a linked list of dispatch handlers for each msg_type that
+ this messaging server can deal with */
struct dispatch_fn {
struct dispatch_fn *next, *prev;
uint32_t msg_type;
void *private;
- void (*fn)(struct messaging_context *msg, void *private,
- uint32_t msg_type, servid_t server_id, DATA_BLOB *data);
+ msg_callback_t fn;
};
/* an individual message */
struct messaging_rec {
+ struct messaging_rec *next, *prev;
struct messaging_context *msg;
- struct socket_context *sock;
- struct fd_event *fde;
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;
+ } *header;
- DATA_BLOB data;
-
- 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(struct messaging_context *msg, void *private,
- uint32_t msg_type, servid_t src, DATA_BLOB *data)
+ 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:""));
+ (uint_t)src, (int)data->length,
+ data->data?(const char *)data->data:""));
messaging_send(msg, src, MSG_PONG, data);
}
+/*
+ return uptime of messaging server via irpc
+*/
+static NTSTATUS irpc_uptime(struct irpc_message *msg,
+ struct irpc_uptime *r)
+{
+ struct messaging_context *ctx = talloc_get_type(msg->private, struct messaging_context);
+ *r->out.start_time = timeval_to_nttime(&ctx->start_time);
+ return NT_STATUS_OK;
+}
+
/*
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 = smbd_tmp_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
+
+ note that this deliberately can match more than one message handler
+ per message. That allows a single messasging context to register
+ (for example) a debug handler for more than one piece of code
*/
static void messaging_dispatch(struct messaging_context *msg, struct messaging_rec *rec)
{
struct dispatch_fn *d, *next;
- for (d=msg->dispatch;d;d=next) {
- next = d->next;
- if (d->msg_type == rec->header.msg_type) {
- d->fn(msg, d->private, d->msg_type, rec->header.from, &rec->data);
- }
+
+ /* temporary IDs use an idtree, the rest use a array of pointers */
+ if (rec->header->msg_type >= MSG_TMP_BASE) {
+ d = idr_find(msg->dispatch_tree, rec->header->msg_type);
+ } else if (rec->header->msg_type < msg->num_types) {
+ d = msg->dispatch[rec->header->msg_type];
+ } else {
+ d = NULL;
}
- /* 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;
+ for (; d; d = next) {
+ DATA_BLOB data;
+ next = d->next;
+ 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);
+ }
+ 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_context *msg = rec->msg;
+ size_t nsent;
+ void *priv;
NTSTATUS status;
+ struct socket_address *path;
- if (rec->ndone < sizeof(rec->header)) {
- /* receive the header */
- size_t nread;
-
- status = socket_recv(rec->sock,
- rec->ndone + (char *)&rec->header,
- sizeof(rec->header) - rec->ndone, &nread, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
+ /* rec->path is the path of the *other* socket, where we want
+ * this to end up */
+ path = socket_address_from_strings(msg, msg->sock->backend_name,
+ rec->path, 0);
+ if (!path) {
+ return NT_STATUS_NO_MEMORY;
+ }
- if (nread == 0) {
- return;
- }
+ /* we send with privileges so messages work from any context */
+ priv = root_privileges();
+ status = socket_sendto(msg->sock, &rec->packet, &nsent, path);
+ talloc_free(path);
+ talloc_free(priv);
- rec->ndone += nread;
+ return status;
+}
- 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);
- }
+/*
+ handle a socket write event
+*/
+static void messaging_send_handler(struct messaging_context *msg)
+{
+ 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);
}
+}
- if (rec->ndone >= sizeof(rec->header) &&
- rec->ndone < sizeof(rec->header) + rec->header.length) {
- /* receive the body, if any */
- size_t nread;
+/*
+ handle a new incoming packet
+*/
+static void messaging_recv_handler(struct messaging_context *msg)
+{
+ struct messaging_rec *rec;
+ NTSTATUS status;
+ DATA_BLOB packet;
+ size_t msize;
- status = socket_recv(rec->sock,
- rec->data.data + (rec->ndone - sizeof(rec->header)),
- sizeof(rec->header) + rec->header.length - rec->ndone,
- &nread, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
+ /* 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);
+ if (!NT_STATUS_IS_OK(status)) {
+ data_blob_free(&packet);
+ return;
+ }
- if (nread == 0) {
- return;
- }
+ if (msize < sizeof(*rec->header)) {
+ DEBUG(0,("messaging: bad message of size %d\n", (int)msize));
+ data_blob_free(&packet);
+ return;
+ }
- rec->ndone += nread;
+ rec = talloc(msg, struct messaging_rec);
+ if (rec == NULL) {
+ smb_panic("Unable to allocate messaging_rec");
}
- if (rec->ndone == sizeof(rec->header) + rec->header.length) {
- /* we've got the whole message */
- messaging_dispatch(msg, rec);
+ talloc_steal(rec, packet.data);
+ rec->msg = msg;
+ rec->path = msg->path;
+ rec->header = (struct messaging_header *)packet.data;
+ rec->packet = packet;
+
+ if (msize != sizeof(*rec->header) + rec->header->length) {
+ DEBUG(0,("messaging: bad message header size %d should be %d\n",
+ rec->header->length, (int)(msize - sizeof(*rec->header))));
+ talloc_free(rec);
+ return;
}
+
+ messaging_dispatch(msg, rec);
+ talloc_free(rec);
}
+
/*
- destroy a messaging record
+ handle a socket event
*/
-static int rec_destructor(void *ptr)
+static void messaging_handler(struct event_context *ev, struct fd_event *fde,
+ uint16_t flags, void *private)
{
- struct messaging_rec *rec = ptr;
- struct messaging_context *msg = rec->msg;
- event_remove_fd(msg->event.ev, rec->fde);
- return 0;
+ 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);
+ }
}
+
/*
- handle a new incoming connection
+ Register a dispatch function for a particular message type.
*/
-static void messaging_listen_handler(struct event_context *ev, struct fd_event *fde,
- time_t t, uint16_t flags)
+NTSTATUS messaging_register(struct messaging_context *msg, void *private,
+ uint32_t msg_type, msg_callback_t fn)
{
- struct messaging_context *msg = fde->private;
- struct messaging_rec *rec;
- NTSTATUS status;
- struct fd_event fde2;
-
- rec = talloc_p(msg, struct messaging_rec);
- if (rec == NULL) {
- smb_panic("Unable to allocate messaging_rec");
- }
+ struct dispatch_fn *d;
- status = socket_accept(msg->sock, &rec->sock);
- if (!NT_STATUS_IS_OK(status)) {
- smb_panic("Unable to accept messaging_rec");
+ /* possibly expand dispatch array */
+ if (msg_type >= msg->num_types) {
+ struct dispatch_fn **dp;
+ int i;
+ dp = talloc_realloc(msg, msg->dispatch, struct dispatch_fn *, msg_type+1);
+ NT_STATUS_HAVE_NO_MEMORY(dp);
+ msg->dispatch = dp;
+ for (i=msg->num_types;i<=msg_type;i++) {
+ msg->dispatch[i] = NULL;
+ }
+ msg->num_types = msg_type+1;
}
- talloc_steal(rec, rec->sock);
-
- rec->msg = msg;
- rec->ndone = 0;
- rec->header.length = 0;
- rec->path = msg->path;
- fde2.private = rec;
- fde2.fd = socket_get_fd(rec->sock);
- fde2.flags = EVENT_FD_READ;
- fde2.handler = messaging_recv_handler;
+ d = talloc_zero(msg->dispatch, struct dispatch_fn);
+ NT_STATUS_HAVE_NO_MEMORY(d);
+ d->msg_type = msg_type;
+ d->private = private;
+ d->fn = fn;
- rec->fde = event_add_fd(msg->event.ev, &fde2);
+ DLIST_ADD(msg->dispatch[msg_type], d);
- talloc_set_destructor(rec, rec_destructor);
+ return NT_STATUS_OK;
}
/*
- Register a dispatch function for a particular message type.
+ register a temporary message handler. The msg_type is allocated
+ above MSG_TMP_BASE
*/
-void messaging_register(struct messaging_context *msg, void *private,
- uint32_t msg_type,
- void (*fn)(struct messaging_context *, void *, uint32_t, servid_t, DATA_BLOB *))
+NTSTATUS messaging_register_tmp(struct messaging_context *msg, void *private,
+ msg_callback_t fn, uint32_t *msg_type)
{
struct dispatch_fn *d;
+ int id;
- d = talloc_p(msg, struct dispatch_fn);
- d->msg_type = msg_type;
+ d = talloc_zero(msg->dispatch, struct dispatch_fn);
+ NT_STATUS_HAVE_NO_MEMORY(d);
d->private = private;
d->fn = fn;
- DLIST_ADD(msg->dispatch, d);
+
+ id = idr_get_new_above(msg->dispatch_tree, d, MSG_TMP_BASE, UINT16_MAX);
+ if (id == -1) {
+ talloc_free(d);
+ return NT_STATUS_TOO_MANY_CONTEXT_IDS;
+ }
+
+ d->msg_type = (uint32_t)id;
+ (*msg_type) = d->msg_type;
+
+ return NT_STATUS_OK;
}
/*
{
struct dispatch_fn *d, *next;
- for (d = msg->dispatch; d; d = next) {
+ if (msg_type >= msg->num_types) {
+ d = idr_find(msg->dispatch_tree, msg_type);
+ if (!d) return;
+ idr_remove(msg->dispatch_tree, msg_type);
+ talloc_free(d);
+ return;
+ }
+
+ for (d = msg->dispatch[msg_type]; d; d = next) {
next = d->next;
- if (d->msg_type == msg_type &&
- d->private == private) {
- DLIST_REMOVE(msg->dispatch, d);
+ if (d->private == private) {
+ DLIST_REMOVE(msg->dispatch[msg_type], d);
talloc_free(d);
}
- }
+ }
}
-
-
/*
- handle IO for sending a message
+ Send a message to a particular server
*/
-static void messaging_send_handler(struct event_context *ev, struct fd_event *fde,
- time_t t, uint16_t flags)
+NTSTATUS messaging_send(struct messaging_context *msg, uint32_t server,
+ uint32_t msg_type, DATA_BLOB *data)
{
- struct messaging_rec *rec = fde->private;
+ struct messaging_rec *rec;
NTSTATUS status;
+ size_t dlength = data?data->length:0;
+
+ rec = talloc(msg, struct messaging_rec);
+ if (rec == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
- if (rec->ndone < sizeof(rec->header)) {
- /* send the header */
- size_t nsent;
- DATA_BLOB blob;
+ rec->packet = data_blob_talloc(rec, NULL, sizeof(*rec->header) + dlength);
+ if (rec->packet.data == NULL) {
+ talloc_free(rec);
+ return NT_STATUS_NO_MEMORY;
+ }
- blob.data = rec->ndone + (char *)&rec->header;
- blob.length = sizeof(rec->header) - rec->ndone;
+ 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);
+ }
- status = socket_send(rec->sock, &blob, &nsent, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
+ rec->path = messaging_path(msg, server);
+ talloc_steal(rec, rec->path);
- if (nsent == 0) {
- return;
- }
+ if (msg->pending != NULL) {
+ status = STATUS_MORE_ENTRIES;
+ } else {
+ status = try_send(rec);
+ }
- rec->ndone += nsent;
+ 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;
}
- 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;
+ talloc_free(rec);
- blob.data = rec->data.data + (rec->ndone - sizeof(rec->header));
- blob.length = rec->header.length - (rec->ndone - sizeof(rec->header));
+ return status;
+}
- status = socket_send(rec->sock, &blob, &nsent, 0);
- if (NT_STATUS_IS_ERR(status)) {
- talloc_free(rec);
- return;
- }
+/*
+ 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;
- rec->ndone += nsent;
- }
+ blob.data = (void *)&ptr;
+ blob.length = sizeof(void *);
- if (rec->ndone == sizeof(rec->header) + rec->header.length) {
- /* we've done the whole message */
- talloc_free(rec);
- }
+ return messaging_send(msg, server, msg_type, &blob);
}
/*
- when the servers listen queue is full we use this to backoff the message
+ destroy the messaging context
*/
-static void messaging_backoff_handler(struct event_context *ev, struct timed_event *te, time_t t)
+static int messaging_destructor(void *ptr)
{
- struct messaging_rec *rec = te->private;
- struct messaging_context *msg = rec->msg;
+ struct messaging_context *msg = ptr;
+ unlink(msg->path);
+ while (msg->names && msg->names[0]) {
+ irpc_remove_name(msg, msg->names[0]);
+ }
+ return 0;
+}
+
+/*
+ create the listening socket and setup the dispatcher
+*/
+struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, uint32_t server_id,
+ struct event_context *ev)
+{
+ struct messaging_context *msg;
NTSTATUS status;
- struct fd_event fde;
+ struct socket_address *path;
+ char *dir;
- status = socket_connect(rec->sock, NULL, 0, rec->path, 0, 0);
- if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
- /* backoff again */
- te->next_event = t+1;
- return;
+ msg = talloc_zero(mem_ctx, struct messaging_context);
+ if (msg == NULL) {
+ return NULL;
+ }
+
+ if (ev == NULL) {
+ ev = event_context_init(msg);
}
+ /* create the messaging directory if needed */
+ dir = smbd_tmp_path(msg, "messaging");
+ mkdir(dir, 0700);
+ talloc_free(dir);
+
+ msg->base_path = smbd_tmp_path(msg, "messaging");
+ msg->path = messaging_path(msg, server_id);
+ msg->server_id = server_id;
+ msg->idr = idr_init(msg);
+ msg->dispatch_tree = idr_init(msg);
+ msg->start_time = timeval_current();
+
+ status = socket_create("unix", SOCKET_TYPE_DGRAM, &msg->sock, 0);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1,("messaging: Lost message from %u to %u of type %u after backoff - %s\n",
- rec->header.from, rec->header.to, rec->header.msg_type, nt_errstr(status)));
- talloc_free(rec);
- return;
+ talloc_free(msg);
+ return NULL;
}
- fde.private = rec;
- fde.fd = socket_get_fd(rec->sock);
- fde.flags = EVENT_FD_WRITE;
- fde.handler = messaging_send_handler;
+ /* by stealing here we ensure that the socket is cleaned up (and even
+ deleted) on exit */
+ talloc_steal(msg, msg->sock);
- rec->fde = event_add_fd(msg->event.ev, &fde);
+ path = socket_address_from_strings(msg, msg->sock->backend_name,
+ msg->path, 0);
+ if (!path) {
+ talloc_free(msg);
+ return NULL;
+ }
- talloc_set_destructor(rec, rec_destructor);
+ status = socket_listen(msg->sock, path, 50, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("Unable to setup messaging listener for '%s':%s\n", msg->path, nt_errstr(status)));
+ talloc_free(msg);
+ return NULL;
+ }
- messaging_send_handler(msg->event.ev, rec->fde, 0, EVENT_FD_WRITE);
+ /* it needs to be non blocking for sends */
+ set_blocking(socket_get_fd(msg->sock), False);
+
+ 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);
+ IRPC_REGISTER(msg, irpc, IRPC_UPTIME, irpc_uptime, msg);
+
+ return msg;
+}
+
+/*
+ A hack, for the short term until we get 'client only' messaging in place
+*/
+struct messaging_context *messaging_client_init(TALLOC_CTX *mem_ctx,
+ struct event_context *ev)
+{
+ return messaging_init(mem_ctx, random() % 0x10000000, ev);
}
+/*
+ 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;
+};
/*
- Send a message to a particular server
+ register a irpc server function
*/
-NTSTATUS messaging_send(struct messaging_context *msg, servid_t server, uint32_t msg_type, DATA_BLOB *data)
+NTSTATUS irpc_register(struct messaging_context *msg_ctx,
+ const struct dcerpc_interface_table *table,
+ int callnum, irpc_function_t fn, void *private)
{
- struct messaging_rec *rec;
- NTSTATUS status;
- struct fd_event fde;
+ struct irpc_list *irpc;
- rec = talloc_p(msg, struct messaging_rec);
- if (rec == NULL) {
- return NT_STATUS_NO_MEMORY;
+ /* 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;
+ irpc->uuid = irpc->table->syntax_id.uuid;
- 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);
+ return NT_STATUS_OK;
+}
+
+
+/*
+ handle an incoming irpc reply message
+*/
+static void irpc_handler_reply(struct messaging_context *msg_ctx, struct irpc_message *m)
+{
+ struct irpc_request *irpc;
+
+ irpc = idr_find(msg_ctx->idr, m->header.callid);
+ if (irpc == NULL) return;
+
+ /* parse the reply data */
+ irpc->status = irpc->table->calls[irpc->callnum].ndr_pull(m->ndr, NDR_OUT, irpc->r);
+ if (NT_STATUS_IS_OK(irpc->status)) {
+ irpc->status = m->header.status;
+ talloc_steal(irpc->mem_ctx, m);
} else {
- rec->data = data_blob(NULL, 0);
+ talloc_steal(irpc, m);
+ }
+ irpc->done = True;
+ if (irpc->async.fn) {
+ irpc->async.fn(irpc);
}
- rec->ndone = 0;
+}
- status = socket_create("unix", SOCKET_TYPE_STREAM, &rec->sock, 0);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(rec);
- return status;
+/*
+ send a irpc reply
+*/
+NTSTATUS irpc_send_reply(struct irpc_message *m, NTSTATUS status)
+{
+ struct ndr_push *push;
+ DATA_BLOB packet;
+
+ m->header.status = status;
+
+ /* setup the reply */
+ push = ndr_push_init_ctx(m->ndr);
+ if (push == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
}
- talloc_steal(rec, rec->sock);
- rec->path = messaging_path(rec, server);
+ m->header.flags |= IRPC_FLAG_REPLY;
- status = socket_connect(rec->sock, NULL, 0, rec->path, 0, 0);
- if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
- /* backoff on this message - the servers listen queue is full */
- struct timed_event te;
- te.next_event = time(NULL)+1;
- te.handler = messaging_backoff_handler;
- te.private = rec;
- event_add_timed(msg->event.ev, &te);
- return NT_STATUS_OK;
+ /* construct the packet */
+ status = ndr_push_irpc_header(push, NDR_SCALARS|NDR_BUFFERS, &m->header);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ status = m->irpc->table->calls[m->irpc->callnum].ndr_push(push, NDR_OUT, m->data);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ /* send the reply message */
+ packet = ndr_push_blob(push);
+ status = messaging_send(m->msg_ctx, m->from, MSG_IRPC, &packet);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+failed:
+ talloc_free(m);
+ return status;
+}
+
+/*
+ handle an incoming irpc request message
+*/
+static void irpc_handler_request(struct messaging_context *msg_ctx,
+ struct irpc_message *m)
+{
+ struct irpc_list *i;
+ void *r;
+ NTSTATUS status;
+
+ for (i=msg_ctx->irpc; i; i=i->next) {
+ if (GUID_equal(&i->uuid, &m->header.uuid) &&
+ i->table->syntax_id.if_version == m->header.if_version &&
+ i->callnum == m->header.callnum) {
+ break;
+ }
}
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(rec);
- return status;
+ if (i == NULL) {
+ /* no registered handler for this message */
+ talloc_free(m);
+ return;
}
- fde.private = rec;
- fde.fd = socket_get_fd(rec->sock);
- fde.flags = EVENT_FD_WRITE;
- fde.handler = messaging_send_handler;
+ /* allocate space for the structure */
+ r = talloc_zero_size(m->ndr, i->table->calls[m->header.callnum].struct_size);
+ if (r == NULL) goto failed;
- rec->fde = event_add_fd(msg->event.ev, &fde);
+ /* parse the request data */
+ status = i->table->calls[i->callnum].ndr_pull(m->ndr, NDR_IN, r);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
- talloc_set_destructor(rec, rec_destructor);
+ /* make the call */
+ m->private = i->private;
+ m->defer_reply = False;
+ m->msg_ctx = msg_ctx;
+ m->irpc = i;
+ m->data = r;
+ m->ev = msg_ctx->event.ev;
- messaging_send_handler(msg->event.ev, rec->fde, 0, EVENT_FD_WRITE);
+ m->header.status = i->fn(m, r);
- return NT_STATUS_OK;
+ if (m->defer_reply) {
+ /* the server function has asked to defer the reply to later */
+ talloc_steal(msg_ctx, m);
+ return;
+ }
+
+ irpc_send_reply(m, m->header.status);
+ return;
+
+failed:
+ talloc_free(m);
+}
+
+/*
+ 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_message *m;
+ NTSTATUS status;
+
+ m = talloc(msg_ctx, struct irpc_message);
+ if (m == NULL) goto failed;
+
+ m->from = src;
+
+ m->ndr = ndr_pull_init_blob(packet, m);
+ if (m->ndr == NULL) goto failed;
+
+ m->ndr->flags |= LIBNDR_FLAG_REF_ALLOC;
+
+ status = ndr_pull_irpc_header(m->ndr, NDR_BUFFERS|NDR_SCALARS, &m->header);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ if (m->header.flags & IRPC_FLAG_REPLY) {
+ irpc_handler_reply(msg_ctx, m);
+ } else {
+ irpc_handler_request(msg_ctx, m);
+ }
+ return;
+
+failed:
+ talloc_free(m);
}
/*
- destroy the messaging context
+ destroy a irpc request
*/
-static int messaging_destructor(void *ptr)
+static int irpc_destructor(void *ptr)
{
- struct messaging_context *msg = ptr;
- event_remove_fd(msg->event.ev, msg->event.fde);
- unlink(msg->path);
+ struct irpc_request *irpc = talloc_get_type(ptr, struct irpc_request);
+ idr_remove(irpc->msg_ctx->idr, irpc->callid);
return 0;
}
/*
- create the listening socket and setup the dispatcher
+ timeout a irpc request
*/
-struct messaging_context *messaging_init(TALLOC_CTX *mem_ctx, servid_t server_id, struct event_context *ev)
+static void irpc_timeout(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private)
{
- struct messaging_context *msg;
+ 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, TALLOC_CTX *ctx)
+{
+ struct irpc_header header;
+ struct ndr_push *ndr;
NTSTATUS status;
- struct fd_event fde;
+ 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;
+ irpc->mem_ctx = ctx;
+
+ talloc_set_destructor(irpc, irpc_destructor);
+
+ /* setup the header */
+ header.uuid = table->syntax_id.uuid;
+
+ header.if_version = table->syntax_id.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;
+}
- msg = talloc_p(mem_ctx, struct messaging_context);
- if (msg == 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,
+ TALLOC_CTX *mem_ctx)
+{
+ struct irpc_request *irpc = irpc_call_send(msg_ctx, server_id,
+ table, callnum, r, mem_ctx);
+ return irpc_call_recv(irpc);
+}
+
+/*
+ open the naming database
+*/
+static struct tdb_wrap *irpc_namedb_open(struct messaging_context *msg_ctx)
+{
+ struct tdb_wrap *t;
+ char *path = talloc_asprintf(msg_ctx, "%s/names.tdb", msg_ctx->base_path);
+ if (path == NULL) {
return NULL;
}
+ t = tdb_wrap_open(msg_ctx, path, 0, 0, O_RDWR|O_CREAT, 0660);
+ talloc_free(path);
+ return t;
+}
+
- /* create the messaging directory if needed */
- msg->path = smbd_tmp_path(msg, "messaging");
- mkdir(msg->path, 0700);
- talloc_free(msg->path);
+/*
+ add a string name that this irpc server can be called on
+*/
+NTSTATUS irpc_add_name(struct messaging_context *msg_ctx, const char *name)
+{
+ struct tdb_wrap *t;
+ TDB_DATA rec;
+ int count;
+ NTSTATUS status = NT_STATUS_OK;
- msg->server_id = server_id;
- msg->dispatch = NULL;
- msg->path = messaging_path(msg, server_id);
+ t = irpc_namedb_open(msg_ctx);
+ NT_STATUS_HAVE_NO_MEMORY(t);
- status = socket_create("unix", SOCKET_TYPE_STREAM, &msg->sock, 0);
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(msg);
- return NULL;
+ if (tdb_lock_bystring(t->tdb, name) != 0) {
+ talloc_free(t);
+ return NT_STATUS_LOCK_NOT_GRANTED;
+ }
+ rec = tdb_fetch_bystring(t->tdb, name);
+ count = rec.dsize / sizeof(uint32_t);
+ rec.dptr = (unsigned char *)realloc_p(rec.dptr, uint32_t, count+1);
+ rec.dsize += sizeof(uint32_t);
+ if (rec.dptr == NULL) {
+ tdb_unlock_bystring(t->tdb, name);
+ talloc_free(t);
+ return NT_STATUS_NO_MEMORY;
}
+ ((uint32_t *)rec.dptr)[count] = msg_ctx->server_id;
+ if (tdb_store_bystring(t->tdb, name, rec, 0) != 0) {
+ status = NT_STATUS_INTERNAL_ERROR;
+ }
+ free(rec.dptr);
+ tdb_unlock_bystring(t->tdb, name);
+ talloc_free(t);
- /* by stealing here we ensure that the socket is cleaned up (and even
- deleted) on exit */
- talloc_steal(msg, msg->sock);
+ msg_ctx->names = str_list_add(msg_ctx->names, name);
+ talloc_steal(msg_ctx, msg_ctx->names);
- 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));
- talloc_free(msg);
+ return status;
+}
+
+/*
+ return a list of server ids for a server name
+*/
+uint32_t *irpc_servers_byname(struct messaging_context *msg_ctx, const char *name)
+{
+ struct tdb_wrap *t;
+ TDB_DATA rec;
+ int count, i;
+ uint32_t *ret;
+
+ t = irpc_namedb_open(msg_ctx);
+ if (t == NULL) {
return NULL;
}
- fde.private = msg;
- fde.fd = socket_get_fd(msg->sock);
- fde.flags = EVENT_FD_READ;
- fde.handler = messaging_listen_handler;
+ if (tdb_lock_bystring(t->tdb, name) != 0) {
+ talloc_free(t);
+ return NULL;
+ }
+ rec = tdb_fetch_bystring(t->tdb, name);
+ if (rec.dptr == NULL) {
+ tdb_unlock_bystring(t->tdb, name);
+ talloc_free(t);
+ return NULL;
+ }
+ count = rec.dsize / sizeof(uint32_t);
+ ret = talloc_array(msg_ctx, uint32_t, count+1);
+ if (ret == NULL) {
+ tdb_unlock_bystring(t->tdb, name);
+ talloc_free(t);
+ return NULL;
+ }
+ for (i=0;i<count;i++) {
+ ret[i] = ((uint32_t *)rec.dptr)[i];
+ }
+ ret[i] = 0;
+ free(rec.dptr);
+ tdb_unlock_bystring(t->tdb, name);
+ talloc_free(t);
- msg->event.ev = ev;
- msg->event.fde = event_add_fd(ev, &fde);
+ return ret;
+}
- talloc_set_destructor(msg, messaging_destructor);
-
- messaging_register(msg, NULL, MSG_PING, ping_message);
+/*
+ remove a name from a messaging context
+*/
+void irpc_remove_name(struct messaging_context *msg_ctx, const char *name)
+{
+ struct tdb_wrap *t;
+ TDB_DATA rec;
+ int count, i;
+ uint32_t *ids;
- return msg;
-}
+ str_list_remove(msg_ctx->names, name);
+ t = irpc_namedb_open(msg_ctx);
+ if (t == NULL) {
+ return;
+ }
+ if (tdb_lock_bystring(t->tdb, name) != 0) {
+ talloc_free(t);
+ return;
+ }
+ rec = tdb_fetch_bystring(t->tdb, name);
+ count = rec.dsize / sizeof(uint32_t);
+ if (count == 0) {
+ tdb_unlock_bystring(t->tdb, name);
+ talloc_free(t);
+ return;
+ }
+ ids = (uint32_t *)rec.dptr;
+ for (i=0;i<count;i++) {
+ if (ids[i] == msg_ctx->server_id) {
+ if (i < count-1) {
+ memmove(ids+i, ids+i+1, count-(i+1));
+ }
+ rec.dsize -= sizeof(uint32_t);
+ break;
+ }
+ }
+ tdb_store_bystring(t->tdb, name, rec, 0);
+ free(rec.dptr);
+ tdb_unlock_bystring(t->tdb, name);
+ talloc_free(t);
+}
git.samba.org / bbaumbach / samba-autobuild / .git / blobdiff