#include "librpc/rpc/dcerpc_proto.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "librpc/gen_ndr/ndr_dcerpc.h"
-#include "libcli/composite/composite.h"
#include "auth/gensec/gensec.h"
#include "param/param.h"
#include "lib/util/tevent_ntstatus.h"
uint16_t opnum;
DATA_BLOB request_data;
bool ignore_timeout;
+ bool wait_for_sync;
/* use by the ndr level async recv call */
struct {
}
static void dcerpc_connection_dead(struct dcecli_connection *conn, NTSTATUS status);
-static void dcerpc_ship_next_request(struct dcecli_connection *c);
+static void dcerpc_schedule_io_trigger(struct dcecli_connection *c);
-static struct rpc_request *dcerpc_request_send(struct dcerpc_pipe *p,
+static struct rpc_request *dcerpc_request_send(TALLOC_CTX *mem_ctx,
+ struct dcerpc_pipe *p,
const struct GUID *object,
uint16_t opnum,
DATA_BLOB *stub_data);
c->srv_max_recv_frag = 0;
c->pending = NULL;
+ c->io_trigger = tevent_create_immediate(c);
+ if (c->io_trigger == NULL) {
+ talloc_free(c);
+ return NULL;
+ }
+
talloc_set_destructor(c, dcerpc_connection_destructor);
return c;
return tevent_req_post(req, ev);
}
- subreq = dcerpc_request_send(hs->p,
+ subreq = dcerpc_request_send(state,
+ hs->p,
object,
opnum,
&state->in_data);
struct ndr_pull *ndr;
enum ndr_err_code ndr_err;
- ndr = ndr_pull_init_flags(c, blob, mem_ctx);
+ ndr = ndr_pull_init_blob(blob, mem_ctx);
if (!ndr) {
return NT_STATUS_NO_MEMORY;
}
ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
}
+ if (CVAL(blob->data, DCERPC_PFC_OFFSET) & DCERPC_PFC_FLAG_OBJECT_UUID) {
+ ndr->flags |= LIBNDR_FLAG_OBJECT_PRESENT;
+ }
+
ndr_err = ndr_pull_ncacn_packet(ndr, NDR_SCALARS|NDR_BUFFERS, pkt);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return ndr_map_error2ntstatus(ndr_err);
}
+ if (pkt->frag_length != blob->length) {
+ return NT_STATUS_RPC_PROTOCOL_ERROR;
+ }
+
return NT_STATUS_OK;
}
size_t hdr_size = DCERPC_REQUEST_LENGTH;
/* non-signed packets are simpler */
- if (sig_size == 0) {
+ if (c->security_state.auth_info == NULL) {
return ncacn_push_auth(blob, mem_ctx, pkt, NULL);
}
switch (c->security_state.auth_info->auth_level) {
case DCERPC_AUTH_LEVEL_PRIVACY:
case DCERPC_AUTH_LEVEL_INTEGRITY:
+ if (sig_size == 0) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
break;
case DCERPC_AUTH_LEVEL_CONNECT:
return NT_STATUS_UNSUCCESSFUL;
}
-/*
- a bind or alter context has failed
-*/
-static void dcerpc_composite_fail(struct rpc_request *req)
-{
- struct composite_context *c = talloc_get_type(req->async.private_data,
- struct composite_context);
- composite_error(c, req->status);
-}
-
/*
remove requests from the pending or queued queues
*/
conn->dead = true;
+ TALLOC_FREE(conn->io_trigger);
+ conn->io_trigger_pending = false;
+
conn->transport.recv_data = NULL;
if (conn->transport.shutdown_pipe) {
}
}
+ /* all requests, which are not shipped */
+ while (conn->request_queue) {
+ struct rpc_request *req = conn->request_queue;
+ dcerpc_req_dequeue(req);
+ req->state = RPC_REQUEST_DONE;
+ req->status = status;
+ if (req->async.callback) {
+ req->async.callback(req);
+ }
+ }
+
talloc_set_destructor(conn, NULL);
if (conn->free_skipped) {
talloc_free(conn);
dcerpc_request_recv_data(conn, blob, &pkt);
}
-/*
- Receive a bind reply from the transport
-*/
-static void dcerpc_bind_recv_handler(struct rpc_request *req,
- DATA_BLOB *raw_packet, struct ncacn_packet *pkt)
-{
- struct composite_context *c;
- struct dcecli_connection *conn;
-
- c = talloc_get_type(req->async.private_data, struct composite_context);
-
- if (pkt->ptype == DCERPC_PKT_BIND_NAK) {
- DEBUG(2,("dcerpc: bind_nak reason %d\n",
- pkt->u.bind_nak.reject_reason));
- composite_error(c, dcerpc_map_reason(pkt->u.bind_nak.
- reject_reason));
- return;
- }
-
- if ((pkt->ptype != DCERPC_PKT_BIND_ACK) ||
- (pkt->u.bind_ack.num_results == 0) ||
- (pkt->u.bind_ack.ctx_list[0].result != 0)) {
- req->p->last_fault_code = DCERPC_NCA_S_PROTO_ERROR;
- composite_error(c, NT_STATUS_NET_WRITE_FAULT);
- return;
- }
-
- conn = req->p->conn;
-
- conn->srv_max_xmit_frag = pkt->u.bind_ack.max_xmit_frag;
- conn->srv_max_recv_frag = pkt->u.bind_ack.max_recv_frag;
-
- if ((req->p->binding->flags & DCERPC_CONCURRENT_MULTIPLEX) &&
- (pkt->pfc_flags & DCERPC_PFC_FLAG_CONC_MPX)) {
- conn->flags |= DCERPC_CONCURRENT_MULTIPLEX;
- }
-
- if ((req->p->binding->flags & DCERPC_HEADER_SIGNING) &&
- (pkt->pfc_flags & DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN)) {
- conn->flags |= DCERPC_HEADER_SIGNING;
- }
-
- /* the bind_ack might contain a reply set of credentials */
- if (conn->security_state.auth_info && pkt->u.bind_ack.auth_info.length) {
- NTSTATUS status;
- uint32_t auth_length;
- status = dcerpc_pull_auth_trailer(pkt, conn, &pkt->u.bind_ack.auth_info,
- conn->security_state.auth_info, &auth_length, true);
- if (!NT_STATUS_IS_OK(status)) {
- composite_error(c, status);
- return;
- }
- }
-
- req->p->assoc_group_id = pkt->u.bind_ack.assoc_group_id;
-
- composite_done(c);
-}
-
/*
handle timeouts of individual dcerpc requests
*/
dcerpc_connection_dead(req->p->conn, NT_STATUS_IO_TIMEOUT);
}
-/*
- send a async dcerpc bind request
-*/
-struct composite_context *dcerpc_bind_send(struct dcerpc_pipe *p,
- TALLOC_CTX *mem_ctx,
- const struct ndr_syntax_id *syntax,
- const struct ndr_syntax_id *transfer_syntax)
+struct dcerpc_bind_state {
+ struct tevent_context *ev;
+ struct dcerpc_pipe *p;
+};
+
+static void dcerpc_bind_fail_handler(struct rpc_request *subreq);
+static void dcerpc_bind_recv_handler(struct rpc_request *subreq,
+ DATA_BLOB *raw_packet,
+ struct ncacn_packet *pkt);
+
+struct tevent_req *dcerpc_bind_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct dcerpc_pipe *p,
+ const struct ndr_syntax_id *syntax,
+ const struct ndr_syntax_id *transfer_syntax)
{
- struct composite_context *c;
+ struct tevent_req *req;
+ struct dcerpc_bind_state *state;
struct ncacn_packet pkt;
DATA_BLOB blob;
- struct rpc_request *req;
+ NTSTATUS status;
+ struct rpc_request *subreq;
- c = composite_create(mem_ctx,p->conn->event_ctx);
- if (c == NULL) return NULL;
+ req = tevent_req_create(mem_ctx, &state,
+ struct dcerpc_bind_state);
+ if (req == NULL) {
+ return NULL;
+ }
- c->private_data = p;
+ state->ev = ev;
+ state->p = p;
p->syntax = *syntax;
p->transfer_syntax = *transfer_syntax;
pkt.u.bind.assoc_group_id = p->binding->assoc_group_id;
pkt.u.bind.num_contexts = 1;
pkt.u.bind.ctx_list = talloc_array(mem_ctx, struct dcerpc_ctx_list, 1);
- if (composite_nomem(pkt.u.bind.ctx_list, c)) return c;
+ if (tevent_req_nomem(pkt.u.bind.ctx_list, req)) {
+ return tevent_req_post(req, ev);
+ }
pkt.u.bind.ctx_list[0].context_id = p->context_id;
pkt.u.bind.ctx_list[0].num_transfer_syntaxes = 1;
pkt.u.bind.ctx_list[0].abstract_syntax = p->syntax;
pkt.u.bind.auth_info = data_blob(NULL, 0);
/* construct the NDR form of the packet */
- c->status = ncacn_push_auth(&blob, c, &pkt,
- p->conn->security_state.auth_info);
- if (!composite_is_ok(c)) return c;
+ status = ncacn_push_auth(&blob, state, &pkt,
+ p->conn->security_state.auth_info);
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
p->conn->transport.recv_data = dcerpc_recv_data;
* we allocate a dcerpc_request so we can be in the same
* request queue as normal requests
*/
- req = talloc_zero(c, struct rpc_request);
- if (composite_nomem(req, c)) return c;
+ subreq = talloc_zero(state, struct rpc_request);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
- req->state = RPC_REQUEST_PENDING;
- req->call_id = pkt.call_id;
- req->async.private_data = c;
- req->async.callback = dcerpc_composite_fail;
- req->p = p;
- req->recv_handler = dcerpc_bind_recv_handler;
- DLIST_ADD_END(p->conn->pending, req, struct rpc_request *);
- talloc_set_destructor(req, dcerpc_req_dequeue);
+ subreq->state = RPC_REQUEST_PENDING;
+ subreq->call_id = pkt.call_id;
+ subreq->async.private_data = req;
+ subreq->async.callback = dcerpc_bind_fail_handler;
+ subreq->p = p;
+ subreq->recv_handler = dcerpc_bind_recv_handler;
+ DLIST_ADD_END(p->conn->pending, subreq, struct rpc_request *);
+ talloc_set_destructor(subreq, dcerpc_req_dequeue);
+
+ status = p->conn->transport.send_request(p->conn, &blob, true);
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
- c->status = p->conn->transport.send_request(p->conn, &blob,
- true);
- if (!composite_is_ok(c)) return c;
+ tevent_add_timer(ev, subreq,
+ timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
+ dcerpc_timeout_handler, subreq);
- tevent_add_timer(c->event_ctx, req,
- timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
- dcerpc_timeout_handler, req);
+ return req;
+}
- return c;
+static void dcerpc_bind_fail_handler(struct rpc_request *subreq)
+{
+ struct tevent_req *req =
+ talloc_get_type_abort(subreq->async.private_data,
+ struct tevent_req);
+ struct dcerpc_bind_state *state =
+ tevent_req_data(req,
+ struct dcerpc_bind_state);
+ NTSTATUS status = subreq->status;
+
+ TALLOC_FREE(subreq);
+
+ /*
+ * We trigger the callback in the next event run
+ * because the code in this file might trigger
+ * multiple request callbacks from within a single
+ * while loop.
+ *
+ * In order to avoid segfaults from within
+ * dcerpc_connection_dead() we call
+ * tevent_req_defer_callback().
+ */
+ tevent_req_defer_callback(req, state->ev);
+
+ tevent_req_nterror(req, status);
}
-/*
- recv side of async dcerpc bind request
-*/
-NTSTATUS dcerpc_bind_recv(struct composite_context *ctx)
+static void dcerpc_bind_recv_handler(struct rpc_request *subreq,
+ DATA_BLOB *raw_packet,
+ struct ncacn_packet *pkt)
+{
+ struct tevent_req *req =
+ talloc_get_type_abort(subreq->async.private_data,
+ struct tevent_req);
+ struct dcerpc_bind_state *state =
+ tevent_req_data(req,
+ struct dcerpc_bind_state);
+ struct dcecli_connection *conn = state->p->conn;
+ NTSTATUS status;
+
+ /*
+ * Note that pkt is allocated under raw_packet->data,
+ * while raw_packet->data is a child of subreq.
+ */
+ talloc_steal(state, raw_packet->data);
+ TALLOC_FREE(subreq);
+
+ /*
+ * We trigger the callback in the next event run
+ * because the code in this file might trigger
+ * multiple request callbacks from within a single
+ * while loop.
+ *
+ * In order to avoid segfaults from within
+ * dcerpc_connection_dead() we call
+ * tevent_req_defer_callback().
+ */
+ tevent_req_defer_callback(req, state->ev);
+
+ if (pkt->ptype == DCERPC_PKT_BIND_NAK) {
+ status = dcerpc_map_reason(pkt->u.bind_nak.reject_reason);
+
+ DEBUG(2,("dcerpc: bind_nak reason %d - %s\n",
+ pkt->u.bind_nak.reject_reason, nt_errstr(status)));
+
+ tevent_req_nterror(req, status);
+ return;
+ }
+
+ if ((pkt->ptype != DCERPC_PKT_BIND_ACK) ||
+ (pkt->u.bind_ack.num_results == 0) ||
+ (pkt->u.bind_ack.ctx_list[0].result != 0)) {
+ state->p->last_fault_code = DCERPC_NCA_S_PROTO_ERROR;
+ tevent_req_nterror(req, NT_STATUS_NET_WRITE_FAULT);
+ return;
+ }
+
+ conn->srv_max_xmit_frag = pkt->u.bind_ack.max_xmit_frag;
+ conn->srv_max_recv_frag = pkt->u.bind_ack.max_recv_frag;
+
+ if ((state->p->binding->flags & DCERPC_CONCURRENT_MULTIPLEX) &&
+ (pkt->pfc_flags & DCERPC_PFC_FLAG_CONC_MPX)) {
+ conn->flags |= DCERPC_CONCURRENT_MULTIPLEX;
+ }
+
+ if ((state->p->binding->flags & DCERPC_HEADER_SIGNING) &&
+ (pkt->pfc_flags & DCERPC_PFC_FLAG_SUPPORT_HEADER_SIGN)) {
+ conn->flags |= DCERPC_HEADER_SIGNING;
+ }
+
+ /* the bind_ack might contain a reply set of credentials */
+ if (conn->security_state.auth_info && pkt->u.bind_ack.auth_info.length) {
+ uint32_t auth_length;
+
+ status = dcerpc_pull_auth_trailer(pkt, conn, &pkt->u.bind_ack.auth_info,
+ conn->security_state.auth_info, &auth_length, true);
+ if (tevent_req_nterror(req, status)) {
+ return;
+ }
+ }
+
+ state->p->assoc_group_id = pkt->u.bind_ack.assoc_group_id;
+
+ tevent_req_done(req);
+}
+
+NTSTATUS dcerpc_bind_recv(struct tevent_req *req)
{
- NTSTATUS result = composite_wait(ctx);
- talloc_free(ctx);
- return result;
+ return tevent_req_simple_recv_ntstatus(req);
}
/*
if (req->recv_handler != NULL) {
dcerpc_req_dequeue(req);
req->state = RPC_REQUEST_DONE;
+
+ /*
+ * We have to look at shipping further requests before calling
+ * the async function, that one might close the pipe
+ */
+ dcerpc_schedule_io_trigger(c);
+
req->recv_handler(req, raw_packet, pkt);
return;
}
req_done:
/* we've got the full payload */
+ dcerpc_req_dequeue(req);
req->state = RPC_REQUEST_DONE;
- DLIST_REMOVE(c->pending, req);
- if (c->request_queue != NULL) {
- /* We have to look at shipping further requests before calling
- * the async function, that one might close the pipe */
- dcerpc_ship_next_request(c);
- }
+ /*
+ * We have to look at shipping further requests before calling
+ * the async function, that one might close the pipe
+ */
+ dcerpc_schedule_io_trigger(c);
if (req->async.callback) {
req->async.callback(req);
/*
perform the send side of a async dcerpc request
*/
-static struct rpc_request *dcerpc_request_send(struct dcerpc_pipe *p,
+static struct rpc_request *dcerpc_request_send(TALLOC_CTX *mem_ctx,
+ struct dcerpc_pipe *p,
const struct GUID *object,
uint16_t opnum,
DATA_BLOB *stub_data)
p->conn->transport.recv_data = dcerpc_recv_data;
- req = talloc(p, struct rpc_request);
+ req = talloc_zero(mem_ctx, struct rpc_request);
if (req == NULL) {
return NULL;
}
req->p = p;
req->call_id = next_call_id(p->conn);
- req->status = NT_STATUS_OK;
req->state = RPC_REQUEST_QUEUED;
- req->payload = data_blob(NULL, 0);
- req->flags = 0;
- req->fault_code = 0;
- req->ignore_timeout = false;
- req->async.callback = NULL;
- req->async.private_data = NULL;
- req->recv_handler = NULL;
if (object != NULL) {
req->object = (struct GUID *)talloc_memdup(req, (const void *)object, sizeof(*object));
talloc_free(req);
return NULL;
}
- } else {
- req->object = NULL;
}
req->opnum = opnum;
req->request_data.length = stub_data->length;
- req->request_data.data = talloc_reference(req, stub_data->data);
- if (req->request_data.length && req->request_data.data == NULL) {
- return NULL;
- }
+ req->request_data.data = stub_data->data;
DLIST_ADD_END(p->conn->request_queue, req, struct rpc_request *);
talloc_set_destructor(req, dcerpc_req_dequeue);
- dcerpc_ship_next_request(p->conn);
+ dcerpc_schedule_io_trigger(p->conn);
if (p->request_timeout) {
tevent_add_timer(dcerpc_event_context(p), req,
bool first_packet = true;
size_t sig_size = 0;
bool need_async = false;
+ bool can_async = true;
req = c->request_queue;
if (req == NULL) {
need_async = true;
}
+ if (c->security_state.auth_info &&
+ c->security_state.generic_state)
+ {
+ struct gensec_security *gensec = c->security_state.generic_state;
+
+ switch (c->security_state.auth_info->auth_level) {
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ can_async = gensec_have_feature(gensec,
+ GENSEC_FEATURE_ASYNC_REPLIES);
+ break;
+ case DCERPC_AUTH_LEVEL_CONNECT:
+ case DCERPC_AUTH_LEVEL_NONE:
+ can_async = true;
+ break;
+ default:
+ can_async = false;
+ break;
+ }
+ }
+
+ if (need_async && !can_async) {
+ req->wait_for_sync = true;
+ return;
+ }
+
DLIST_REMOVE(c->request_queue, req);
DLIST_ADD(c->pending, req);
req->state = RPC_REQUEST_PENDING;
chunk_size -= DCERPC_REQUEST_LENGTH;
if (c->security_state.auth_info &&
c->security_state.generic_state) {
+ size_t max_payload = chunk_size;
+
+ max_payload -= DCERPC_AUTH_TRAILER_LENGTH;
+ max_payload -= (max_payload % DCERPC_AUTH_PAD_ALIGNMENT);
+
sig_size = gensec_sig_size(c->security_state.generic_state,
- p->conn->srv_max_recv_frag);
+ max_payload);
if (sig_size) {
chunk_size -= DCERPC_AUTH_TRAILER_LENGTH;
chunk_size -= sig_size;
}
}
- chunk_size -= (chunk_size % 16);
+ chunk_size -= (chunk_size % DCERPC_AUTH_PAD_ALIGNMENT);
pkt.ptype = DCERPC_PKT_REQUEST;
pkt.call_id = req->call_id;
}
}
+static void dcerpc_io_trigger(struct tevent_context *ctx,
+ struct tevent_immediate *im,
+ void *private_data)
+{
+ struct dcecli_connection *c =
+ talloc_get_type_abort(private_data,
+ struct dcecli_connection);
+
+ c->io_trigger_pending = false;
+
+ dcerpc_schedule_io_trigger(c);
+
+ dcerpc_ship_next_request(c);
+}
+
+static void dcerpc_schedule_io_trigger(struct dcecli_connection *c)
+{
+ if (c->dead) {
+ return;
+ }
+
+ if (c->request_queue == NULL) {
+ return;
+ }
+
+ if (c->request_queue->wait_for_sync && c->pending) {
+ return;
+ }
+
+ if (c->io_trigger_pending) {
+ return;
+ }
+
+ c->io_trigger_pending = true;
+
+ tevent_schedule_immediate(c->io_trigger,
+ c->event_ctx,
+ dcerpc_io_trigger,
+ c);
+}
+
/*
return the event context for a dcerpc pipe
used by callers who wish to operate asynchronously
return auth_level;
}
-/*
- Receive an alter reply from the transport
-*/
-static void dcerpc_alter_recv_handler(struct rpc_request *req,
- DATA_BLOB *raw_packet, struct ncacn_packet *pkt)
-{
- struct composite_context *c;
- struct dcerpc_pipe *recv_pipe;
-
- c = talloc_get_type(req->async.private_data, struct composite_context);
- recv_pipe = talloc_get_type(c->private_data, struct dcerpc_pipe);
-
- if (pkt->ptype == DCERPC_PKT_ALTER_RESP &&
- pkt->u.alter_resp.num_results == 1 &&
- pkt->u.alter_resp.ctx_list[0].result != 0) {
- DEBUG(2,("dcerpc: alter_resp failed - reason %d\n",
- pkt->u.alter_resp.ctx_list[0].reason));
- composite_error(c, dcerpc_map_reason(pkt->u.alter_resp.ctx_list[0].reason));
- return;
- }
-
- if (pkt->ptype == DCERPC_PKT_FAULT) {
- DEBUG(5,("rpc fault: %s\n", dcerpc_errstr(c, pkt->u.fault.status)));
- recv_pipe->last_fault_code = pkt->u.fault.status;
- composite_error(c, NT_STATUS_NET_WRITE_FAULT);
- return;
- }
-
- if (pkt->ptype != DCERPC_PKT_ALTER_RESP ||
- pkt->u.alter_resp.num_results == 0 ||
- pkt->u.alter_resp.ctx_list[0].result != 0) {
- recv_pipe->last_fault_code = DCERPC_NCA_S_PROTO_ERROR;
- composite_error(c, NT_STATUS_NET_WRITE_FAULT);
- return;
- }
-
- /* the alter_resp might contain a reply set of credentials */
- if (recv_pipe->conn->security_state.auth_info &&
- pkt->u.alter_resp.auth_info.length) {
- struct dcecli_connection *conn = recv_pipe->conn;
- NTSTATUS status;
- uint32_t auth_length;
- status = dcerpc_pull_auth_trailer(pkt, conn, &pkt->u.alter_resp.auth_info,
- conn->security_state.auth_info, &auth_length, true);
- if (!NT_STATUS_IS_OK(status)) {
- composite_error(c, status);
- return;
- }
- }
+struct dcerpc_alter_context_state {
+ struct tevent_context *ev;
+ struct dcerpc_pipe *p;
+};
- composite_done(c);
-}
+static void dcerpc_alter_context_fail_handler(struct rpc_request *subreq);
+static void dcerpc_alter_context_recv_handler(struct rpc_request *req,
+ DATA_BLOB *raw_packet,
+ struct ncacn_packet *pkt);
-/*
- send a dcerpc alter_context request
-*/
-struct composite_context *dcerpc_alter_context_send(struct dcerpc_pipe *p,
- TALLOC_CTX *mem_ctx,
- const struct ndr_syntax_id *syntax,
- const struct ndr_syntax_id *transfer_syntax)
+struct tevent_req *dcerpc_alter_context_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct dcerpc_pipe *p,
+ const struct ndr_syntax_id *syntax,
+ const struct ndr_syntax_id *transfer_syntax)
{
- struct composite_context *c;
+ struct tevent_req *req;
+ struct dcerpc_alter_context_state *state;
struct ncacn_packet pkt;
DATA_BLOB blob;
- struct rpc_request *req;
+ NTSTATUS status;
+ struct rpc_request *subreq;
- c = composite_create(mem_ctx, p->conn->event_ctx);
- if (c == NULL) return NULL;
+ req = tevent_req_create(mem_ctx, &state,
+ struct dcerpc_alter_context_state);
+ if (req == NULL) {
+ return NULL;
+ }
- c->private_data = p;
+ state->ev = ev;
+ state->p = p;
p->syntax = *syntax;
p->transfer_syntax = *transfer_syntax;
pkt.u.alter.max_recv_frag = 5840;
pkt.u.alter.assoc_group_id = p->binding->assoc_group_id;
pkt.u.alter.num_contexts = 1;
- pkt.u.alter.ctx_list = talloc_array(c, struct dcerpc_ctx_list, 1);
- if (composite_nomem(pkt.u.alter.ctx_list, c)) return c;
+ pkt.u.alter.ctx_list = talloc_array(state, struct dcerpc_ctx_list, 1);
+ if (tevent_req_nomem(pkt.u.alter.ctx_list, req)) {
+ return tevent_req_post(req, ev);
+ }
pkt.u.alter.ctx_list[0].context_id = p->context_id;
pkt.u.alter.ctx_list[0].num_transfer_syntaxes = 1;
pkt.u.alter.ctx_list[0].abstract_syntax = p->syntax;
pkt.u.alter.auth_info = data_blob(NULL, 0);
/* construct the NDR form of the packet */
- c->status = ncacn_push_auth(&blob, mem_ctx, &pkt,
- p->conn->security_state.auth_info);
- if (!composite_is_ok(c)) return c;
+ status = ncacn_push_auth(&blob, state, &pkt,
+ p->conn->security_state.auth_info);
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
p->conn->transport.recv_data = dcerpc_recv_data;
* we allocate a dcerpc_request so we can be in the same
* request queue as normal requests
*/
- req = talloc_zero(c, struct rpc_request);
- if (composite_nomem(req, c)) return c;
+ subreq = talloc_zero(state, struct rpc_request);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
- req->state = RPC_REQUEST_PENDING;
- req->call_id = pkt.call_id;
- req->async.private_data = c;
- req->async.callback = dcerpc_composite_fail;
- req->p = p;
- req->recv_handler = dcerpc_alter_recv_handler;
- DLIST_ADD_END(p->conn->pending, req, struct rpc_request *);
- talloc_set_destructor(req, dcerpc_req_dequeue);
+ subreq->state = RPC_REQUEST_PENDING;
+ subreq->call_id = pkt.call_id;
+ subreq->async.private_data = req;
+ subreq->async.callback = dcerpc_alter_context_fail_handler;
+ subreq->p = p;
+ subreq->recv_handler = dcerpc_alter_context_recv_handler;
+ DLIST_ADD_END(p->conn->pending, subreq, struct rpc_request *);
+ talloc_set_destructor(subreq, dcerpc_req_dequeue);
+
+ status = p->conn->transport.send_request(p->conn, &blob, true);
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
- c->status = p->conn->transport.send_request(p->conn, &blob, true);
- if (!composite_is_ok(c)) return c;
+ tevent_add_timer(ev, subreq,
+ timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
+ dcerpc_timeout_handler, subreq);
- tevent_add_timer(c->event_ctx, req,
- timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
- dcerpc_timeout_handler, req);
+ return req;
+}
- return c;
+static void dcerpc_alter_context_fail_handler(struct rpc_request *subreq)
+{
+ struct tevent_req *req =
+ talloc_get_type_abort(subreq->async.private_data,
+ struct tevent_req);
+ struct dcerpc_alter_context_state *state =
+ tevent_req_data(req,
+ struct dcerpc_alter_context_state);
+ NTSTATUS status = subreq->status;
+
+ TALLOC_FREE(subreq);
+
+ /*
+ * We trigger the callback in the next event run
+ * because the code in this file might trigger
+ * multiple request callbacks from within a single
+ * while loop.
+ *
+ * In order to avoid segfaults from within
+ * dcerpc_connection_dead() we call
+ * tevent_req_defer_callback().
+ */
+ tevent_req_defer_callback(req, state->ev);
+
+ tevent_req_nterror(req, status);
+}
+
+static void dcerpc_alter_context_recv_handler(struct rpc_request *subreq,
+ DATA_BLOB *raw_packet,
+ struct ncacn_packet *pkt)
+{
+ struct tevent_req *req =
+ talloc_get_type_abort(subreq->async.private_data,
+ struct tevent_req);
+ struct dcerpc_alter_context_state *state =
+ tevent_req_data(req,
+ struct dcerpc_alter_context_state);
+ struct dcecli_connection *conn = state->p->conn;
+ NTSTATUS status;
+
+ /*
+ * Note that pkt is allocated under raw_packet->data,
+ * while raw_packet->data is a child of subreq.
+ */
+ talloc_steal(state, raw_packet->data);
+ TALLOC_FREE(subreq);
+
+ /*
+ * We trigger the callback in the next event run
+ * because the code in this file might trigger
+ * multiple request callbacks from within a single
+ * while loop.
+ *
+ * In order to avoid segfaults from within
+ * dcerpc_connection_dead() we call
+ * tevent_req_defer_callback().
+ */
+ tevent_req_defer_callback(req, state->ev);
+
+ if (pkt->ptype == DCERPC_PKT_ALTER_RESP &&
+ pkt->u.alter_resp.num_results == 1 &&
+ pkt->u.alter_resp.ctx_list[0].result != 0) {
+ status = dcerpc_map_reason(pkt->u.alter_resp.ctx_list[0].reason);
+ DEBUG(2,("dcerpc: alter_resp failed - reason %d - %s\n",
+ pkt->u.alter_resp.ctx_list[0].reason,
+ nt_errstr(status)));
+ tevent_req_nterror(req, status);
+ return;
+ }
+
+ if (pkt->ptype == DCERPC_PKT_FAULT) {
+ DEBUG(5,("dcerpc: alter_resp - rpc fault: %s\n",
+ dcerpc_errstr(state, pkt->u.fault.status)));
+ if (pkt->u.fault.status == DCERPC_FAULT_ACCESS_DENIED) {
+ state->p->last_fault_code = pkt->u.fault.status;
+ tevent_req_nterror(req, NT_STATUS_LOGON_FAILURE);
+ } else {
+ state->p->last_fault_code = pkt->u.fault.status;
+ tevent_req_nterror(req, NT_STATUS_NET_WRITE_FAULT);
+ }
+ return;
+ }
+
+ if (pkt->ptype != DCERPC_PKT_ALTER_RESP ||
+ pkt->u.alter_resp.num_results == 0 ||
+ pkt->u.alter_resp.ctx_list[0].result != 0) {
+ state->p->last_fault_code = DCERPC_NCA_S_PROTO_ERROR;
+ tevent_req_nterror(req, NT_STATUS_NET_WRITE_FAULT);
+ return;
+ }
+
+ /* the alter_resp might contain a reply set of credentials */
+ if (conn->security_state.auth_info &&
+ pkt->u.alter_resp.auth_info.length) {
+ uint32_t auth_length;
+
+ status = dcerpc_pull_auth_trailer(pkt, conn, &pkt->u.alter_resp.auth_info,
+ conn->security_state.auth_info, &auth_length, true);
+ if (tevent_req_nterror(req, status)) {
+ return;
+ }
+ }
+
+ tevent_req_done(req);
}
-NTSTATUS dcerpc_alter_context_recv(struct composite_context *ctx)
+NTSTATUS dcerpc_alter_context_recv(struct tevent_req *req)
{
- NTSTATUS result = composite_wait(ctx);
- talloc_free(ctx);
- return result;
+ return tevent_req_simple_recv_ntstatus(req);
}
/*
const struct ndr_syntax_id *syntax,
const struct ndr_syntax_id *transfer_syntax)
{
- struct composite_context *creq;
- creq = dcerpc_alter_context_send(p, mem_ctx, syntax, transfer_syntax);
- return dcerpc_alter_context_recv(creq);
+ struct tevent_req *subreq;
+ struct tevent_context *ev = p->conn->event_ctx;
+ bool ok;
+
+ /* TODO: create a new event context here */
+
+ subreq = dcerpc_alter_context_send(mem_ctx, p->conn->event_ctx,
+ p, syntax, transfer_syntax);
+ if (subreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ ok = tevent_req_poll(subreq, ev);
+ if (!ok) {
+ NTSTATUS status;
+ status = map_nt_error_from_unix_common(errno);
+ return status;
+ }
+
+ return dcerpc_alter_context_recv(subreq);
}
git.samba.org / samba.git / blobdiff