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samba-mirror/source4/lib/messaging/messaging.c

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/*
Unix SMB/CIFS implementation.
Samba internal messaging functions
Copyright (C) Andrew Tridgell 2004
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "lib/events/events.h"
#include "lib/util/server_id.h"
#include "system/filesys.h"
#include "messaging/messaging.h"
#include "messaging/messaging_internal.h"
#include "../lib/util/dlinklist.h"
#include "lib/socket/socket.h"
#include "librpc/gen_ndr/ndr_irpc.h"
#include "lib/messaging/irpc.h"
#include "../lib/util/unix_privs.h"
#include "librpc/rpc/dcerpc.h"
#include "cluster/cluster.h"
#include "../lib/util/tevent_ntstatus.h"
#include "lib/param/param.h"
#include "lib/util/server_id_db.h"
#include "lib/util/talloc_report.h"
#include "../source3/lib/messages_dgm.h"
#include "../source3/lib/messages_dgm_ref.h"
#include "../source3/lib/messages_util.h"
#include <tdb.h>
/* change the message version with any incompatible changes in the protocol */
#define IMESSAGING_VERSION 1
/*
a pending irpc call
*/
struct irpc_request {
struct imessaging_context *msg_ctx;
int callid;
struct {
void (*handler)(struct irpc_request *irpc, struct irpc_message *m);
void *private_data;
} incoming;
};
/* 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_data;
msg_callback_t fn;
};
/* an individual message */
static void irpc_handler(struct imessaging_context *, void *,
uint32_t, struct server_id, DATA_BLOB *);
/*
A useful function for testing the message system.
*/
static void ping_message(struct imessaging_context *msg, void *private_data,
uint32_t msg_type, struct server_id src, DATA_BLOB *data)
{
struct server_id_buf idbuf;
DEBUG(1,("INFO: Received PING message from server %s [%.*s]\n",
server_id_str_buf(src, &idbuf), (int)data->length,
data->data?(const char *)data->data:""));
imessaging_send(msg, src, MSG_PONG, data);
}
static void pool_message(struct imessaging_context *msg, void *private_data,
uint32_t msg_type, struct server_id src,
DATA_BLOB *data)
{
char *report;
report = talloc_report_str(msg, NULL);
if (report != NULL) {
DATA_BLOB blob = { .data = (uint8_t *)report,
.length = talloc_get_size(report) - 1};
imessaging_send(msg, src, MSG_POOL_USAGE, &blob);
}
talloc_free(report);
}
static void ringbuf_log_msg(struct imessaging_context *msg,
void *private_data,
uint32_t msg_type,
struct server_id src,
DATA_BLOB *data)
{
char *log = debug_get_ringbuf();
size_t logsize = debug_get_ringbuf_size();
DATA_BLOB blob;
if (log == NULL) {
log = discard_const_p(char, "*disabled*\n");
logsize = strlen(log) + 1;
}
blob.data = (uint8_t *)log;
blob.length = logsize;
imessaging_send(msg, src, MSG_RINGBUF_LOG, &blob);
}
/*
return uptime of messaging server via irpc
*/
static NTSTATUS irpc_uptime(struct irpc_message *msg,
struct irpc_uptime *r)
{
struct imessaging_context *ctx = talloc_get_type(msg->private_data, struct imessaging_context);
*r->out.start_time = timeval_to_nttime(&ctx->start_time);
return NT_STATUS_OK;
}
static struct dispatch_fn *imessaging_find_dispatch(
struct imessaging_context *msg, uint32_t msg_type)
{
/* temporary IDs use an idtree, the rest use a array of pointers */
if (msg_type >= MSG_TMP_BASE) {
return (struct dispatch_fn *)idr_find(msg->dispatch_tree,
msg_type);
}
if (msg_type < msg->num_types) {
return msg->dispatch[msg_type];
}
return NULL;
}
/*
Register a dispatch function for a particular message type.
*/
NTSTATUS imessaging_register(struct imessaging_context *msg, void *private_data,
uint32_t msg_type, msg_callback_t fn)
{
struct dispatch_fn *d;
/* possibly expand dispatch array */
if (msg_type >= msg->num_types) {
struct dispatch_fn **dp;
uint32_t 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_data = private_data;
d->fn = fn;
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 imessaging_register_tmp(struct imessaging_context *msg, void *private_data,
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_data = private_data;
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;
}
/*
De-register the function for a particular message type.
*/
void imessaging_deregister(struct imessaging_context *msg, uint32_t msg_type, void *private_data)
{
struct dispatch_fn *d, *next;
if (msg_type >= msg->num_types) {
d = (struct dispatch_fn *)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->private_data == private_data) {
DLIST_REMOVE(msg->dispatch[msg_type], d);
talloc_free(d);
}
}
}
/*
*/
int imessaging_cleanup(struct imessaging_context *msg)
{
if (!msg) {
return 0;
}
return 0;
}
static void imessaging_dgm_recv(struct tevent_context *ev,
const uint8_t *buf, size_t buf_len,
int *fds, size_t num_fds,
void *private_data);
/* Keep a list of imessaging contexts */
static struct imessaging_context *msg_ctxs;
static int imessaging_context_destructor(struct imessaging_context *msg)
{
DLIST_REMOVE(msg_ctxs, msg);
TALLOC_FREE(msg->msg_dgm_ref);
return 0;
}
/*
* Cleanup messaging dgm contexts on a specific event context.
*
* We must make sure to unref all messaging_dgm_ref's *before* the
* tevent context goes away. Only when the last ref is freed, the
* refcounted messaging dgm context will be freed.
*/
void imessaging_dgm_unref_ev(struct tevent_context *ev)
{
struct imessaging_context *msg = NULL;
for (msg = msg_ctxs; msg != NULL; msg = msg->next) {
if (msg->ev == ev) {
TALLOC_FREE(msg->msg_dgm_ref);
}
}
}
static NTSTATUS imessaging_reinit(struct imessaging_context *msg)
{
int ret = -1;
TALLOC_FREE(msg->msg_dgm_ref);
msg->server_id.pid = getpid();
msg->msg_dgm_ref = messaging_dgm_ref(msg,
msg->ev,
&msg->server_id.unique_id,
msg->sock_dir,
msg->lock_dir,
imessaging_dgm_recv,
msg,
&ret);
if (msg->msg_dgm_ref == NULL) {
DEBUG(2, ("messaging_dgm_ref failed: %s\n",
strerror(ret)));
return map_nt_error_from_unix_common(ret);
}
server_id_db_reinit(msg->names, msg->server_id);
return NT_STATUS_OK;
}
/*
* Must be called after a fork.
*/
NTSTATUS imessaging_reinit_all(void)
{
struct imessaging_context *msg = NULL;
for (msg = msg_ctxs; msg != NULL; msg = msg->next) {
NTSTATUS status = imessaging_reinit(msg);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
}
return NT_STATUS_OK;
}
/*
create the listening socket and setup the dispatcher
*/
struct imessaging_context *imessaging_init(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
struct server_id server_id,
struct tevent_context *ev)
{
NTSTATUS status;
struct imessaging_context *msg;
bool ok;
int ret;
const char *lock_dir = NULL;
int tdb_flags = TDB_INCOMPATIBLE_HASH | TDB_CLEAR_IF_FIRST;
if (ev == NULL) {
return NULL;
}
msg = talloc_zero(mem_ctx, struct imessaging_context);
if (msg == NULL) {
return NULL;
}
msg->ev = ev;
talloc_set_destructor(msg, imessaging_context_destructor);
/* create the messaging directory if needed */
lock_dir = lpcfg_lock_directory(lp_ctx);
if (lock_dir == NULL) {
goto fail;
}
msg->sock_dir = lpcfg_private_path(msg, lp_ctx, "msg.sock");
if (msg->sock_dir == NULL) {
goto fail;
}
ok = directory_create_or_exist_strict(msg->sock_dir, geteuid(), 0700);
if (!ok) {
goto fail;
}
msg->lock_dir = lpcfg_lock_path(msg, lp_ctx, "msg.lock");
if (msg->lock_dir == NULL) {
goto fail;
}
ok = directory_create_or_exist_strict(msg->lock_dir, geteuid(), 0755);
if (!ok) {
goto fail;
}
msg->msg_dgm_ref = messaging_dgm_ref(
msg, ev, &server_id.unique_id, msg->sock_dir, msg->lock_dir,
imessaging_dgm_recv, msg, &ret);
if (msg->msg_dgm_ref == NULL) {
goto fail;
}
msg->server_id = server_id;
msg->idr = idr_init(msg);
if (msg->idr == NULL) {
goto fail;
}
msg->dispatch_tree = idr_init(msg);
if (msg->dispatch_tree == NULL) {
goto fail;
}
msg->start_time = timeval_current();
tdb_flags |= lpcfg_tdb_flags(lp_ctx, 0);
/*
* This context holds a destructor that cleans up any names
* registered on this context on talloc_free()
*/
msg->names = server_id_db_init(msg, server_id, lock_dir, 0, tdb_flags);
if (msg->names == NULL) {
goto fail;
}
status = imessaging_register(msg, NULL, MSG_PING, ping_message);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
status = imessaging_register(msg, NULL, MSG_REQ_POOL_USAGE,
pool_message);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
status = imessaging_register(msg, NULL, MSG_IRPC, irpc_handler);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
status = imessaging_register(msg, NULL, MSG_REQ_RINGBUF_LOG,
ringbuf_log_msg);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
status = IRPC_REGISTER(msg, irpc, IRPC_UPTIME, irpc_uptime, msg);
if (!NT_STATUS_IS_OK(status)) {
goto fail;
}
DLIST_ADD(msg_ctxs, msg);
return msg;
fail:
talloc_free(msg);
return NULL;
}
struct imessaging_post_state {
struct imessaging_context *msg_ctx;
size_t buf_len;
uint8_t buf[];
};
static void imessaging_post_handler(struct tevent_context *ev,
struct tevent_immediate *ti,
void *private_data)
{
struct imessaging_post_state *state = talloc_get_type_abort(
private_data, struct imessaging_post_state);
imessaging_dgm_recv(ev, state->buf, state->buf_len, NULL, 0,
state->msg_ctx);
TALLOC_FREE(state);
}
static int imessaging_post_self(struct imessaging_context *msg,
const uint8_t *buf, size_t buf_len)
{
struct tevent_immediate *ti;
struct imessaging_post_state *state;
state = talloc_size(
msg, offsetof(struct imessaging_post_state, buf) + buf_len);
if (state == NULL) {
return ENOMEM;
}
talloc_set_name_const(state, "struct imessaging_post_state");
ti = tevent_create_immediate(state);
if (ti == NULL) {
TALLOC_FREE(state);
return ENOMEM;
}
state->msg_ctx = msg;
state->buf_len = buf_len;
memcpy(state->buf, buf, buf_len);
tevent_schedule_immediate(ti, msg->ev, imessaging_post_handler,
state);
return 0;
}
static void imessaging_dgm_recv(struct tevent_context *ev,
const uint8_t *buf, size_t buf_len,
int *fds, size_t num_fds,
void *private_data)
{
struct imessaging_context *msg = talloc_get_type_abort(
private_data, struct imessaging_context);
uint32_t msg_type;
struct server_id src, dst;
struct server_id_buf srcbuf, dstbuf;
DATA_BLOB data;
if (buf_len < MESSAGE_HDR_LENGTH) {
/* Invalid message, ignore */
return;
}
if (num_fds != 0) {
/*
* Source4 based messaging does not expect fd's yet
*/
return;
}
if (ev != msg->ev) {
int ret;
ret = imessaging_post_self(msg, buf, buf_len);
if (ret != 0) {
DBG_WARNING("imessaging_post_self failed: %s\n",
strerror(ret));
}
return;
}
message_hdr_get(&msg_type, &src, &dst, buf);
data.data = discard_const_p(uint8_t, buf + MESSAGE_HDR_LENGTH);
data.length = buf_len - MESSAGE_HDR_LENGTH;
if ((cluster_id_equal(&dst, &msg->server_id)) ||
((dst.task_id == 0) && (msg->server_id.pid == 0))) {
struct dispatch_fn *d, *next;
DEBUG(10, ("%s: dst %s matches my id: %s, type=0x%x\n",
__func__,
server_id_str_buf(dst, &dstbuf),
server_id_str_buf(msg->server_id, &srcbuf),
(unsigned)msg_type));
d = imessaging_find_dispatch(msg, msg_type);
for (; d; d = next) {
next = d->next;
d->fn(msg, d->private_data, d->msg_type, src, &data);
}
} else {
DEBUG(10, ("%s: Ignoring type=0x%x dst %s, I am %s, \n",
__func__, (unsigned)msg_type,
server_id_str_buf(dst, &dstbuf),
server_id_str_buf(msg->server_id, &srcbuf)));
}
}
/*
A hack, for the short term until we get 'client only' messaging in place
*/
struct imessaging_context *imessaging_client_init(TALLOC_CTX *mem_ctx,
struct loadparm_context *lp_ctx,
struct tevent_context *ev)
{
struct server_id id;
ZERO_STRUCT(id);
id.pid = getpid();
id.task_id = generate_random();
id.vnn = NONCLUSTER_VNN;
/* This is because we are not in the s3 serverid database */
id.unique_id = SERVERID_UNIQUE_ID_NOT_TO_VERIFY;
return imessaging_init(mem_ctx, lp_ctx, id, ev);
}
/*
a list of registered irpc server functions
*/
struct irpc_list {
struct irpc_list *next, *prev;
struct GUID uuid;
const struct ndr_interface_table *table;
int callnum;
irpc_function_t fn;
void *private_data;
};
/*
register a irpc server function
*/
NTSTATUS irpc_register(struct imessaging_context *msg_ctx,
const struct ndr_interface_table *table,
int callnum, irpc_function_t fn, void *private_data)
{
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_data = private_data;
irpc->uuid = irpc->table->syntax_id.uuid;
return NT_STATUS_OK;
}
/*
handle an incoming irpc reply message
*/
static void irpc_handler_reply(struct imessaging_context *msg_ctx, struct irpc_message *m)
{
struct irpc_request *irpc;
irpc = (struct irpc_request *)idr_find(msg_ctx->idr, m->header.callid);
if (irpc == NULL) return;
irpc->incoming.handler(irpc, m);
}
/*
send a irpc reply
*/
NTSTATUS irpc_send_reply(struct irpc_message *m, NTSTATUS status)
{
struct ndr_push *push;
DATA_BLOB packet;
enum ndr_err_code ndr_err;
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;
m->header.creds.token= NULL;
/* construct the packet */
ndr_err = ndr_push_irpc_header(push, NDR_SCALARS|NDR_BUFFERS, &m->header);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
goto failed;
}
ndr_err = m->irpc->table->calls[m->irpc->callnum].ndr_push(push, NDR_OUT, m->data);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
status = ndr_map_error2ntstatus(ndr_err);
goto failed;
}
/* send the reply message */
packet = ndr_push_blob(push);
status = imessaging_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 imessaging_context *msg_ctx,
struct irpc_message *m)
{
struct irpc_list *i;
void *r;
enum ndr_err_code ndr_err;
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 (i == NULL) {
/* no registered handler for this message */
talloc_free(m);
return;
}
/* allocate space for the structure */
r = talloc_zero_size(m->ndr, i->table->calls[m->header.callnum].struct_size);
if (r == NULL) goto failed;
m->ndr->flags |= LIBNDR_FLAG_REF_ALLOC;
/* parse the request data */
ndr_err = i->table->calls[i->callnum].ndr_pull(m->ndr, NDR_IN, r);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) goto failed;
/* make the call */
m->private_data= i->private_data;
m->defer_reply = false;
m->no_reply = false;
m->msg_ctx = msg_ctx;
m->irpc = i;
m->data = r;
m->header.status = i->fn(m, r);
if (m->no_reply) {
/* the server function won't ever be replying to this request */
talloc_free(m);
return;
}
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 imessaging_context *msg_ctx, void *private_data,
uint32_t msg_type, struct server_id src, DATA_BLOB *packet)
{
struct irpc_message *m;
enum ndr_err_code ndr_err;
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;
ndr_err = ndr_pull_irpc_header(m->ndr, NDR_BUFFERS|NDR_SCALARS, &m->header);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) 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 a irpc request
*/
static int irpc_destructor(struct irpc_request *irpc)
{
if (irpc->callid != -1) {
idr_remove(irpc->msg_ctx->idr, irpc->callid);
irpc->callid = -1;
}
return 0;
}
/*
add a string name that this irpc server can be called on
It will be removed from the DB either via irpc_remove_name or on
talloc_free(msg_ctx->names).
*/
NTSTATUS irpc_add_name(struct imessaging_context *msg_ctx, const char *name)
{
int ret;
ret = server_id_db_add(msg_ctx->names, name);
if (ret != 0) {
return map_nt_error_from_unix_common(ret);
}
return NT_STATUS_OK;
}
static int all_servers_func(const char *name, unsigned num_servers,
const struct server_id *servers,
void *private_data)
{
struct irpc_name_records *name_records = talloc_get_type(
private_data, struct irpc_name_records);
struct irpc_name_record *name_record;
uint32_t i;
name_records->names
= talloc_realloc(name_records, name_records->names,
struct irpc_name_record *, name_records->num_records+1);
if (!name_records->names) {
return -1;
}
name_records->names[name_records->num_records] = name_record
= talloc(name_records->names,
struct irpc_name_record);
if (!name_record) {
return -1;
}
name_records->num_records++;
name_record->name = talloc_strdup(name_record, name);
if (!name_record->name) {
return -1;
}
name_record->count = num_servers;
name_record->ids = talloc_array(name_record, struct server_id,
num_servers);
if (name_record->ids == NULL) {
return -1;
}
for (i=0;i<name_record->count;i++) {
name_record->ids[i] = servers[i];
}
return 0;
}
/*
return a list of server ids for a server name
*/
struct irpc_name_records *irpc_all_servers(struct imessaging_context *msg_ctx,
TALLOC_CTX *mem_ctx)
{
int ret;
struct irpc_name_records *name_records = talloc_zero(mem_ctx, struct irpc_name_records);
if (name_records == NULL) {
return NULL;
}
ret = server_id_db_traverse_read(msg_ctx->names, all_servers_func,
name_records);
if (ret == -1) {
TALLOC_FREE(name_records);
return NULL;
}
return name_records;
}
/*
remove a name from a messaging context
*/
void irpc_remove_name(struct imessaging_context *msg_ctx, const char *name)
{
server_id_db_remove(msg_ctx->names, name);
}
struct server_id imessaging_get_server_id(struct imessaging_context *msg_ctx)
{
return msg_ctx->server_id;
}
struct irpc_bh_state {
struct imessaging_context *msg_ctx;
struct server_id server_id;
const struct ndr_interface_table *table;
uint32_t timeout;
struct security_token *token;
};
static bool irpc_bh_is_connected(struct dcerpc_binding_handle *h)
{
struct irpc_bh_state *hs = dcerpc_binding_handle_data(h,
struct irpc_bh_state);
if (!hs->msg_ctx) {
return false;
}
return true;
}
static uint32_t irpc_bh_set_timeout(struct dcerpc_binding_handle *h,
uint32_t timeout)
{
struct irpc_bh_state *hs = dcerpc_binding_handle_data(h,
struct irpc_bh_state);
uint32_t old = hs->timeout;
hs->timeout = timeout;
return old;
}
struct irpc_bh_raw_call_state {
struct irpc_request *irpc;
uint32_t opnum;
DATA_BLOB in_data;
DATA_BLOB in_packet;
DATA_BLOB out_data;
};
static void irpc_bh_raw_call_incoming_handler(struct irpc_request *irpc,
struct irpc_message *m);
static struct tevent_req *irpc_bh_raw_call_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct dcerpc_binding_handle *h,
const struct GUID *object,
uint32_t opnum,
uint32_t in_flags,
const uint8_t *in_data,
size_t in_length)
{
struct irpc_bh_state *hs =
dcerpc_binding_handle_data(h,
struct irpc_bh_state);
struct tevent_req *req;
struct irpc_bh_raw_call_state *state;
bool ok;
struct irpc_header header;
struct ndr_push *ndr;
NTSTATUS status;
enum ndr_err_code ndr_err;
req = tevent_req_create(mem_ctx, &state,
struct irpc_bh_raw_call_state);
if (req == NULL) {
return NULL;
}
state->opnum = opnum;
state->in_data.data = discard_const_p(uint8_t, in_data);
state->in_data.length = in_length;
ok = irpc_bh_is_connected(h);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
return tevent_req_post(req, ev);
}
state->irpc = talloc_zero(state, struct irpc_request);
if (tevent_req_nomem(state->irpc, req)) {
return tevent_req_post(req, ev);
}
state->irpc->msg_ctx = hs->msg_ctx;
state->irpc->callid = idr_get_new(hs->msg_ctx->idr,
state->irpc, UINT16_MAX);
if (state->irpc->callid == -1) {
tevent_req_nterror(req, NT_STATUS_INSUFFICIENT_RESOURCES);
return tevent_req_post(req, ev);
}
state->irpc->incoming.handler = irpc_bh_raw_call_incoming_handler;
state->irpc->incoming.private_data = req;
talloc_set_destructor(state->irpc, irpc_destructor);
/* setup the header */
header.uuid = hs->table->syntax_id.uuid;
header.if_version = hs->table->syntax_id.if_version;
header.callid = state->irpc->callid;
header.callnum = state->opnum;
header.flags = 0;
header.status = NT_STATUS_OK;
header.creds.token= hs->token;
/* construct the irpc packet */
ndr = ndr_push_init_ctx(state->irpc);
if (tevent_req_nomem(ndr, req)) {
return tevent_req_post(req, ev);
}
ndr_err = ndr_push_irpc_header(ndr, NDR_SCALARS|NDR_BUFFERS, &header);
status = ndr_map_error2ntstatus(ndr_err);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
ndr_err = ndr_push_bytes(ndr, in_data, in_length);
status = ndr_map_error2ntstatus(ndr_err);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
/* and send it */
state->in_packet = ndr_push_blob(ndr);
status = imessaging_send(hs->msg_ctx, hs->server_id,
MSG_IRPC, &state->in_packet);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
if (hs->timeout != IRPC_CALL_TIMEOUT_INF) {
/* set timeout-callback in case caller wants that */
ok = tevent_req_set_endtime(req, ev, timeval_current_ofs(hs->timeout, 0));
if (!ok) {
return tevent_req_post(req, ev);
}
}
return req;
}
static void irpc_bh_raw_call_incoming_handler(struct irpc_request *irpc,
struct irpc_message *m)
{
struct tevent_req *req =
talloc_get_type_abort(irpc->incoming.private_data,
struct tevent_req);
struct irpc_bh_raw_call_state *state =
tevent_req_data(req,
struct irpc_bh_raw_call_state);
talloc_steal(state, m);
if (!NT_STATUS_IS_OK(m->header.status)) {
tevent_req_nterror(req, m->header.status);
return;
}
state->out_data = data_blob_talloc(state,
m->ndr->data + m->ndr->offset,
m->ndr->data_size - m->ndr->offset);
if ((m->ndr->data_size - m->ndr->offset) > 0 && !state->out_data.data) {
tevent_req_oom(req);
return;
}
tevent_req_done(req);
}
static NTSTATUS irpc_bh_raw_call_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t **out_data,
size_t *out_length,
uint32_t *out_flags)
{
struct irpc_bh_raw_call_state *state =
tevent_req_data(req,
struct irpc_bh_raw_call_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*out_data = talloc_move(mem_ctx, &state->out_data.data);
*out_length = state->out_data.length;
*out_flags = 0;
tevent_req_received(req);
return NT_STATUS_OK;
}
struct irpc_bh_disconnect_state {
uint8_t _dummy;
};
static struct tevent_req *irpc_bh_disconnect_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct dcerpc_binding_handle *h)
{
struct irpc_bh_state *hs = dcerpc_binding_handle_data(h,
struct irpc_bh_state);
struct tevent_req *req;
struct irpc_bh_disconnect_state *state;
bool ok;
req = tevent_req_create(mem_ctx, &state,
struct irpc_bh_disconnect_state);
if (req == NULL) {
return NULL;
}
ok = irpc_bh_is_connected(h);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
return tevent_req_post(req, ev);
}
hs->msg_ctx = NULL;
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS irpc_bh_disconnect_recv(struct tevent_req *req)
{
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
tevent_req_received(req);
return NT_STATUS_OK;
}
static bool irpc_bh_ref_alloc(struct dcerpc_binding_handle *h)
{
return true;
}
static const struct dcerpc_binding_handle_ops irpc_bh_ops = {
.name = "wbint",
.is_connected = irpc_bh_is_connected,
.set_timeout = irpc_bh_set_timeout,
.raw_call_send = irpc_bh_raw_call_send,
.raw_call_recv = irpc_bh_raw_call_recv,
.disconnect_send = irpc_bh_disconnect_send,
.disconnect_recv = irpc_bh_disconnect_recv,
.ref_alloc = irpc_bh_ref_alloc,
};
/* initialise a irpc binding handle */
struct dcerpc_binding_handle *irpc_binding_handle(TALLOC_CTX *mem_ctx,
struct imessaging_context *msg_ctx,
struct server_id server_id,
const struct ndr_interface_table *table)
{
struct dcerpc_binding_handle *h;
struct irpc_bh_state *hs;
h = dcerpc_binding_handle_create(mem_ctx,
&irpc_bh_ops,
NULL,
table,
&hs,
struct irpc_bh_state,
__location__);
if (h == NULL) {
return NULL;
}
hs->msg_ctx = msg_ctx;
hs->server_id = server_id;
hs->table = table;
hs->timeout = IRPC_CALL_TIMEOUT;
return h;
}
struct dcerpc_binding_handle *irpc_binding_handle_by_name(TALLOC_CTX *mem_ctx,
struct imessaging_context *msg_ctx,
const char *dest_task,
const struct ndr_interface_table *table)
{
struct dcerpc_binding_handle *h;
unsigned num_sids;
struct server_id *sids;
struct server_id sid;
NTSTATUS status;
/* find the server task */
status = irpc_servers_byname(msg_ctx, mem_ctx, dest_task,
&num_sids, &sids);
if (!NT_STATUS_IS_OK(status)) {
errno = EADDRNOTAVAIL;
return NULL;
}
sid = sids[0];
talloc_free(sids);
h = irpc_binding_handle(mem_ctx, msg_ctx,
sid, table);
if (h == NULL) {
return NULL;
}
return h;
}
void irpc_binding_handle_add_security_token(struct dcerpc_binding_handle *h,
struct security_token *token)
{
struct irpc_bh_state *hs =
dcerpc_binding_handle_data(h,
struct irpc_bh_state);
hs->token = token;
}