#include "includes.h"
#include "lib/events/events.h"
-#include "system/dir.h"
#include "system/filesys.h"
-#include "system/time.h"
-#include "messages.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 socket_context *sock;
const char *base_path;
const char *path;
- struct dispatch_fn *dispatch;
+ 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, uint32_t server_id, DATA_BLOB *data);
+ msg_callback_t fn;
};
/* an individual message */
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
*/
/*
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) {
+
+ /* 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;
+ }
+
+ for (; d; d = next) {
+ DATA_BLOB data;
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);
- }
+ 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;
}
size_t nsent;
void *priv;
NTSTATUS status;
+ struct socket_address *path;
+
+ /* 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;
+ }
/* 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);
+ status = socket_sendto(msg->sock, &rec->packet, &nsent, path);
+ talloc_free(path);
talloc_free(priv);
return status;
return;
}
- status = socket_recv(msg->sock, packet.data, msize, &msize, 0);
+ status = socket_recv(msg->sock, packet.data, msize, &msize);
if (!NT_STATUS_IS_OK(status)) {
data_blob_free(&packet);
return;
}
if (msize < sizeof(*rec->header)) {
- DEBUG(0,("messaging: bad message of size %d\n", msize));
+ DEBUG(0,("messaging: bad message of size %d\n", (int)msize));
data_blob_free(&packet);
return;
}
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)));
+ rec->header->length, (int)(msize - sizeof(*rec->header))));
talloc_free(rec);
return;
}
/*
Register a dispatch function for a particular message type.
*/
-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 *))
+NTSTATUS messaging_register(struct messaging_context *msg, void *private,
+ uint32_t msg_type, msg_callback_t fn)
{
struct dispatch_fn *d;
- d = talloc(msg, struct dispatch_fn);
+ /* 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;
+ }
+
+ 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;
- DLIST_ADD(msg->dispatch, d);
+
+ DLIST_ADD(msg->dispatch[msg_type], d);
+
+ return NT_STATUS_OK;
+}
+
+/*
+ register a temporary message handler. The msg_type is allocated
+ above MSG_TMP_BASE
+*/
+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_zero(msg->dispatch, struct dispatch_fn);
+ NT_STATUS_HAVE_NO_MEMORY(d);
+ d->private = private;
+ d->fn = fn;
+
+ 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);
}
- }
+ }
}
-
/*
Send a message to a particular server
*/
{
struct messaging_context *msg = ptr;
unlink(msg->path);
+ while (msg->names && msg->names[0]) {
+ irpc_remove_name(msg, msg->names[0]);
+ }
return 0;
}
{
struct messaging_context *msg;
NTSTATUS status;
- char *path;
+ struct socket_address *path;
+ char *dir;
- msg = talloc(mem_ctx, struct messaging_context);
+ 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 */
- path = smbd_tmp_path(msg, "messaging");
- mkdir(path, 0700);
- talloc_free(path);
+ 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->dispatch = NULL;
- msg->pending = NULL;
- msg->idr = idr_init(msg);
- msg->irpc = NULL;
+ 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)) {
deleted) on exit */
talloc_steal(msg, msg->sock);
- status = socket_listen(msg->sock, msg->path, 0, 50, 0);
+ path = socket_address_from_strings(msg, msg->sock->backend_name,
+ msg->path, 0);
+ if (!path) {
+ talloc_free(msg);
+ return NULL;
+ }
+
+ 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);
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
*/
irpc->callnum = callnum;
irpc->fn = fn;
irpc->private = private;
- GUID_from_string(irpc->table->uuid, &irpc->uuid);
+ irpc->uuid = irpc->table->syntax_id.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)
+static void irpc_handler_reply(struct messaging_context *msg_ctx, struct irpc_message *m)
{
struct irpc_request *irpc;
- irpc = idr_find(msg_ctx->idr, header->callid);
+ 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(ndr, NDR_OUT, irpc->r);
+ irpc->status = irpc->table->calls[irpc->callnum].ndr_pull(m->ndr, NDR_OUT, irpc->r);
if (NT_STATUS_IS_OK(irpc->status)) {
- irpc->status = header->status;
+ irpc->status = m->header.status;
+ talloc_steal(irpc->mem_ctx, m);
+ } else {
+ talloc_steal(irpc, m);
}
irpc->done = True;
if (irpc->async.fn) {
}
}
+/*
+ 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;
+ }
+
+ m->header.flags |= IRPC_FLAG_REPLY;
+
+ /* 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 ndr_pull *ndr, struct irpc_header *header,
- uint32_t src)
+ struct irpc_message *m)
{
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) {
+ 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 (i == NULL) {
/* no registered handler for this message */
+ talloc_free(m);
return;
}
/* allocate space for the structure */
- r = talloc_zero_size(ndr, i->table->calls[header->callnum].struct_size);
+ r = talloc_zero_size(m->ndr, i->table->calls[m->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);
+ status = i->table->calls[i->callnum].ndr_pull(m->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;
+ 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;
+
+ m->header.status = i->fn(m, r);
+
+ if (m->defer_reply) {
+ /* the server function has asked to defer the reply to later */
+ talloc_steal(msg_ctx, m);
+ return;
+ }
- /* 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;
+ irpc_send_reply(m, m->header.status);
+ return;
failed:
- /* nothing to clean up */
- return;
+ talloc_free(m);
}
/*
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;
+ struct irpc_message *m;
NTSTATUS status;
- ndr = ndr_pull_init_blob(packet, msg_ctx);
- if (ndr == NULL) goto failed;
+ m = talloc(msg_ctx, struct irpc_message);
+ if (m == NULL) goto failed;
+
+ m->from = src;
- status = ndr_pull_irpc_header(ndr, NDR_BUFFERS|NDR_SCALARS, &header);
+ 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 (header.flags & IRPC_FLAG_REPLY) {
- irpc_handler_reply(msg_ctx, ndr, &header);
+ if (m->header.flags & IRPC_FLAG_REPLY) {
+ irpc_handler_reply(msg_ctx, m);
} else {
- irpc_handler_request(msg_ctx, ndr, &header, src);
+ irpc_handler_request(msg_ctx, m);
}
+ return;
failed:
- talloc_free(ndr);
+ talloc_free(m);
}
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)
+ int callnum, void *r, TALLOC_CTX *ctx)
{
struct irpc_header header;
struct ndr_push *ndr;
irpc->r = r;
irpc->done = False;
irpc->async.fn = NULL;
+ irpc->mem_ctx = ctx;
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.uuid = table->syntax_id.uuid;
- header.if_version = table->if_version;
+ header.if_version = table->syntax_id.if_version;
header.callid = irpc->callid;
header.callnum = callnum;
header.flags = 0;
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);
NTSTATUS irpc_call(struct messaging_context *msg_ctx,
uint32_t server_id,
const struct dcerpc_interface_table *table,
- int callnum, void *r)
+ int callnum, void *r,
+ TALLOC_CTX *mem_ctx)
{
struct irpc_request *irpc = irpc_call_send(msg_ctx, server_id,
- table, callnum, r);
+ 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;
+}
+
+
+/*
+ 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;
+
+ t = irpc_namedb_open(msg_ctx);
+ NT_STATUS_HAVE_NO_MEMORY(t);
+
+ 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);
+
+ msg_ctx->names = str_list_add(msg_ctx->names, name);
+ talloc_steal(msg_ctx, msg_ctx->names);
+
+ 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;
+ }
+
+ 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);
+
+ return ret;
+}
+
+/*
+ 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;
+
+ 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