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-rw-r--r--source3/rpc_client/cli_pipe.c226
1 files changed, 190 insertions, 36 deletions
diff --git a/source3/rpc_client/cli_pipe.c b/source3/rpc_client/cli_pipe.c
index 1f7e332612..809fb1a9eb 100644
--- a/source3/rpc_client/cli_pipe.c
+++ b/source3/rpc_client/cli_pipe.c
@@ -370,58 +370,212 @@ static NTSTATUS rpc_read(struct rpc_pipe_client *cli,
return status;
}
+static NTSTATUS parse_rpc_header(struct rpc_pipe_client *cli,
+ struct rpc_hdr_info *prhdr,
+ prs_struct *pdu)
+{
+ /*
+ * This next call sets the endian bit correctly in current_pdu. We
+ * will propagate this to rbuf later.
+ */
+
+ if(!smb_io_rpc_hdr("rpc_hdr ", prhdr, pdu, 0)) {
+ DEBUG(0, ("get_current_pdu: Failed to unmarshall RPC_HDR.\n"));
+ return NT_STATUS_BUFFER_TOO_SMALL;
+ }
+
+ if (prhdr->frag_len > cli->max_recv_frag) {
+ DEBUG(0, ("cli_pipe_get_current_pdu: Server sent fraglen %d,"
+ " we only allow %d\n", (int)prhdr->frag_len,
+ (int)cli->max_recv_frag));
+ return NT_STATUS_BUFFER_TOO_SMALL;
+ }
+
+ return NT_STATUS_OK;
+}
+
/****************************************************************************
Try and get a PDU's worth of data from current_pdu. If not, then read more
from the wire.
****************************************************************************/
-static NTSTATUS cli_pipe_get_current_pdu(struct rpc_pipe_client *cli, RPC_HDR *prhdr, prs_struct *current_pdu)
+struct get_complete_pdu_state {
+ struct event_context *ev;
+ struct rpc_pipe_client *cli;
+ struct rpc_hdr_info *prhdr;
+ prs_struct *pdu;
+};
+
+static void get_complete_pdu_got_header(struct async_req *subreq);
+static void get_complete_pdu_got_rest(struct async_req *subreq);
+
+static struct async_req *get_complete_pdu_send(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct rpc_pipe_client *cli,
+ struct rpc_hdr_info *prhdr,
+ prs_struct *pdu)
{
- NTSTATUS ret = NT_STATUS_OK;
- uint32 current_pdu_len = prs_data_size(current_pdu);
+ struct async_req *result, *subreq;
+ struct get_complete_pdu_state *state;
+ uint32_t pdu_len;
+ NTSTATUS status;
- /* Ensure we have at least RPC_HEADER_LEN worth of data to parse. */
- if (current_pdu_len < RPC_HEADER_LEN) {
- if (!rpc_grow_buffer(current_pdu, RPC_HEADER_LEN)) {
- return NT_STATUS_NO_MEMORY;
- }
- ret = rpc_read(cli,
- prs_data_p(current_pdu) + current_pdu_len,
- RPC_HEADER_LEN - current_pdu_len);
- if (!NT_STATUS_IS_OK(ret)) {
- return ret;
- }
- current_pdu_len = RPC_HEADER_LEN;
+ result = async_req_new(mem_ctx);
+ if (result == NULL) {
+ return NULL;
}
+ state = talloc(result, struct get_complete_pdu_state);
+ if (state == NULL) {
+ goto fail;
+ }
+ result->private_data = state;
- /* This next call sets the endian bit correctly in current_pdu. */
- /* We will propagate this to rbuf later. */
- if(!smb_io_rpc_hdr("rpc_hdr ", prhdr, current_pdu, 0)) {
- DEBUG(0,("cli_pipe_get_current_pdu: Failed to unmarshall RPC_HDR.\n"));
- return NT_STATUS_BUFFER_TOO_SMALL;
+ state->ev = ev;
+ state->cli = cli;
+ state->prhdr = prhdr;
+ state->pdu = pdu;
+
+ pdu_len = prs_data_size(pdu);
+ if (pdu_len < RPC_HEADER_LEN) {
+ if (!rpc_grow_buffer(pdu, RPC_HEADER_LEN)) {
+ status = NT_STATUS_NO_MEMORY;
+ goto post_status;
+ }
+ subreq = rpc_read_send(state, state->ev, state->cli,
+ prs_data_p(state->pdu) + pdu_len,
+ RPC_HEADER_LEN - pdu_len);
+ if (subreq == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto post_status;
+ }
+ subreq->async.fn = get_complete_pdu_got_header;
+ subreq->async.priv = result;
+ return result;
}
- if (prhdr->frag_len > cli->max_recv_frag) {
- DEBUG(0, ("cli_pipe_get_current_pdu: Server sent fraglen %d,"
- " we only allow %d\n", (int)prhdr->frag_len,
- (int)cli->max_recv_frag));
- return NT_STATUS_BUFFER_TOO_SMALL;
+ status = parse_rpc_header(cli, prhdr, pdu);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto post_status;
}
- /* Ensure we have frag_len bytes of data. */
- if (current_pdu_len < prhdr->frag_len) {
- if (!rpc_grow_buffer(current_pdu, prhdr->frag_len)) {
- return NT_STATUS_NO_MEMORY;
+ /*
+ * Ensure we have frag_len bytes of data.
+ */
+ if (pdu_len < prhdr->frag_len) {
+ if (!rpc_grow_buffer(pdu, prhdr->frag_len)) {
+ status = NT_STATUS_NO_MEMORY;
+ goto post_status;
}
- ret = rpc_read(cli,
- prs_data_p(current_pdu) + current_pdu_len,
- prhdr->frag_len - current_pdu_len);
- if (!NT_STATUS_IS_OK(ret)) {
- return ret;
+ subreq = rpc_read_send(state, state->ev, state->cli,
+ prs_data_p(pdu) + pdu_len,
+ prhdr->frag_len - pdu_len);
+ if (subreq == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto post_status;
}
+ subreq->async.fn = get_complete_pdu_got_rest;
+ subreq->async.priv = result;
+ return result;
}
- return NT_STATUS_OK;
+ status = NT_STATUS_OK;
+ post_status:
+ if (async_post_status(result, ev, status)) {
+ return result;
+ }
+ fail:
+ TALLOC_FREE(result);
+ return NULL;
+}
+
+static void get_complete_pdu_got_header(struct async_req *subreq)
+{
+ struct async_req *req = talloc_get_type_abort(
+ subreq->async.priv, struct async_req);
+ struct get_complete_pdu_state *state = talloc_get_type_abort(
+ req->private_data, struct get_complete_pdu_state);
+ NTSTATUS status;
+
+ status = rpc_read_recv(subreq);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_error(req, status);
+ return;
+ }
+
+ status = parse_rpc_header(state->cli, state->prhdr, state->pdu);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_error(req, status);
+ return;
+ }
+
+ if (!rpc_grow_buffer(state->pdu, state->prhdr->frag_len)) {
+ async_req_error(req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+
+ /*
+ * We're here in this piece of code because we've read exactly
+ * RPC_HEADER_LEN bytes into state->pdu.
+ */
+
+ subreq = rpc_read_send(state, state->ev, state->cli,
+ prs_data_p(state->pdu) + RPC_HEADER_LEN,
+ state->prhdr->frag_len - RPC_HEADER_LEN);
+ if (async_req_nomem(subreq, req)) {
+ return;
+ }
+ subreq->async.fn = get_complete_pdu_got_rest;
+ subreq->async.priv = req;
+}
+
+static void get_complete_pdu_got_rest(struct async_req *subreq)
+{
+ struct async_req *req = talloc_get_type_abort(
+ subreq->async.priv, struct async_req);
+ NTSTATUS status;
+
+ status = rpc_read_recv(subreq);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_error(req, status);
+ return;
+ }
+ async_req_done(req);
+}
+
+static NTSTATUS get_complete_pdu_recv(struct async_req *req)
+{
+ return async_req_simple_recv(req);
+}
+
+static NTSTATUS get_complete_pdu(struct rpc_pipe_client *cli,
+ struct rpc_hdr_info *prhdr,
+ prs_struct *pdu)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct event_context *ev;
+ struct async_req *req;
+ NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+ ev = event_context_init(frame);
+ if (ev == NULL) {
+ goto fail;
+ }
+
+ req = get_complete_pdu_send(frame, ev, cli, prhdr, pdu);
+ if (req == NULL) {
+ goto fail;
+ }
+
+ while (req->state < ASYNC_REQ_DONE) {
+ event_loop_once(ev);
+ }
+
+ status = get_complete_pdu_recv(req);
+ fail:
+ TALLOC_FREE(frame);
+ return status;
}
/****************************************************************************
@@ -1087,7 +1241,7 @@ static NTSTATUS rpc_api_pipe(struct rpc_pipe_client *cli,
uint32 ret_data_len = 0;
/* Ensure we have enough data for a pdu. */
- ret = cli_pipe_get_current_pdu(cli, &rhdr, &current_pdu);
+ ret = get_complete_pdu(cli, &rhdr, &current_pdu);
if (!NT_STATUS_IS_OK(ret)) {
goto err;
}