Revert "Add infrastructure to support async SMB requests"

This reverts commit f5356825698a02df2d400b51dd95d1f857c83e81.
(cherry picked from commit 5f53a62be8a21b8d92ac44b18d202882500356e8)
(This used to be commit 8beead9c936038365f28467e527b2c066e3a5440)

1 files changed, 0 insertions, 483 deletions

diff --git a/source3/libsmb/async_smb.c b/source3/libsmb/async_smb.c
deleted file mode 100644
index 21bcd5b9b1..0000000000
--- a/source3/libsmb/async_smb.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-   Infrastructure for async SMB client requests
-   Copyright (C) Volker Lendecke 2008
-
-   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"
-
-/*
- * Fetch an error out of a NBT packet
- */
-
-NTSTATUS cli_pull_error(char *buf)
-{
-	uint32_t flags2 = SVAL(buf, smb_flg2);
-
-	if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
-		return NT_STATUS(IVAL(buf, smb_rcls));
-	}
-
-	return NT_STATUS_DOS(CVAL(buf, smb_rcls), SVAL(buf,smb_err));
-}
-
-/*
- * Compatibility helper for the sync APIs: Fake NTSTATUS in cli->inbuf
- */
-
-void cli_set_error(struct cli_state *cli, NTSTATUS status)
-{
-	uint32_t flags2 = SVAL(cli->inbuf, smb_flg2);
-
-	if (NT_STATUS_IS_DOS(status)) {
-		SSVAL(cli->inbuf, smb_flg2,
-		      flags2 & ~FLAGS2_32_BIT_ERROR_CODES);
-		SCVAL(cli->inbuf, smb_rcls, NT_STATUS_DOS_CLASS(status));
-		SSVAL(cli->inbuf, smb_err, NT_STATUS_DOS_CODE(status));
-		return;
-	}
-
-	SSVAL(cli->inbuf, smb_flg2, flags2 | FLAGS2_32_BIT_ERROR_CODES);
-	SIVAL(cli->inbuf, smb_rcls, NT_STATUS_V(status));
-	return;
-}
-
-/*
- * Allocate a new mid
- */
-
-static uint16_t cli_new_mid(struct cli_state *cli)
-{
-	uint16_t result;
-	struct cli_request *req;
-
-	while (true) {
-		result = cli->mid++;
-		if (result == 0) {
-			continue;
-		}
-
-		for (req = cli->outstanding_requests; req; req = req->next) {
-			if (result == req->mid) {
-				break;
-			}
-		}
-
-		if (req == NULL) {
-			return result;
-		}
-	}
-}
-
-static char *cli_request_print(TALLOC_CTX *mem_ctx, struct async_req *req)
-{
-	char *result = async_req_print(mem_ctx, req);
-	struct cli_request *cli_req = cli_request_get(req);
-
-	if (result == NULL) {
-		return NULL;
-	}
-
-	return talloc_asprintf_append_buffer(
-		result, "mid=%d\n", cli_req->mid);
-}
-
-static int cli_request_destructor(struct cli_request *req)
-{
-	if (req->enc_state != NULL) {
-		common_free_enc_buffer(req->enc_state, req->outbuf);
-	}
-	DLIST_REMOVE(req->cli->outstanding_requests, req);
-	return 0;
-}
-
-/*
- * Create a fresh async smb request
- */
-
-struct async_req *cli_request_new(TALLOC_CTX *mem_ctx,
-				  struct event_context *ev,
-				  struct cli_state *cli,
-				  uint8_t num_words, size_t num_bytes,
-				  struct cli_request **preq)
-{
-	struct async_req *result;
-	struct cli_request *cli_req;
-	size_t bufsize = smb_size + num_words * 2 + num_bytes;
-
-	result = async_req_new(mem_ctx, ev);
-	if (result == NULL) {
-		return NULL;
-	}
-
-	cli_req = (struct cli_request *)talloc_size(
-		result, sizeof(*cli_req) + bufsize);
-	if (cli_req == NULL) {
-		TALLOC_FREE(result);
-		return NULL;
-	}
-	talloc_set_name_const(cli_req, "struct cli_request");
-	result->private_data = cli_req;
-	result->print = cli_request_print;
-
-	cli_req->async = result;
-	cli_req->cli = cli;
-	cli_req->outbuf = ((char *)cli_req + sizeof(*cli_req));
-	cli_req->sent = 0;
-	cli_req->mid = cli_new_mid(cli);
-	cli_req->inbuf = NULL;
-	cli_req->enc_state = NULL;
-
-	SCVAL(cli_req->outbuf, smb_wct, num_words);
-	SSVAL(cli_req->outbuf, smb_vwv + num_words * 2, num_bytes);
-
-	DLIST_ADD_END(cli->outstanding_requests, cli_req,
-		      struct cli_request *);
-	talloc_set_destructor(cli_req, cli_request_destructor);
-
-	DEBUG(10, ("cli_request_new: mid=%d\n", cli_req->mid));
-
-	*preq = cli_req;
-	return result;
-}
-
-/*
- * Convenience function to get the SMB part out of an async_req
- */
-
-struct cli_request *cli_request_get(struct async_req *req)
-{
-	if (req == NULL) {
-		return NULL;
-	}
-	return talloc_get_type_abort(req->private_data, struct cli_request);
-}
-
-/*
- * A PDU has arrived on cli->evt_inbuf
- */
-
-static void handle_incoming_pdu(struct cli_state *cli)
-{
-	struct cli_request *req;
-	uint16_t mid;
-	size_t raw_pdu_len, buf_len, pdu_len;
-	size_t rest_len;
-	NTSTATUS status;
-
-	/*
-	 * The encrypted PDU len might differ from the unencrypted one
-	 */
-	raw_pdu_len = smb_len(cli->evt_inbuf) + 4;
-
-	/*
-	 * TODO: Handle oplock break requests
-	 */
-
-	if (cli_encryption_on(cli) && CVAL(cli->evt_inbuf, 0) == 0) {
-		uint16_t enc_ctx_num;
-
-		status = get_enc_ctx_num((uint8_t *)cli->evt_inbuf,
-					 &enc_ctx_num);
-		if (!NT_STATUS_IS_OK(status)) {
-			DEBUG(10, ("get_enc_ctx_num returned %s\n",
-				   nt_errstr(status)));
-			goto invalidate_requests;
-		}
-
-		if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
-			DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
-				   enc_ctx_num,
-				   cli->trans_enc_state->enc_ctx_num));
-			status = NT_STATUS_INVALID_HANDLE;
-			goto invalidate_requests;
-		}
-
-		status = common_decrypt_buffer(cli->trans_enc_state,
-					       cli->evt_inbuf);
-		if (!NT_STATUS_IS_OK(status)) {
-			DEBUG(10, ("common_decrypt_buffer returned %s\n",
-				   nt_errstr(status)));
-			goto invalidate_requests;
-		}
-	}
-
-	if (!cli_check_sign_mac(cli, cli->evt_inbuf)) {
-		DEBUG(10, ("cli_check_sign_mac failed\n"));
-		status = NT_STATUS_ACCESS_DENIED;
-		goto invalidate_requests;
-	}
-
-	mid = SVAL(cli->evt_inbuf, smb_mid);
-
-	DEBUG(10, ("handle_incoming_pdu: got mid %d\n", mid));
-
-	for (req = cli->outstanding_requests; req; req = req->next) {
-		if (req->mid == mid) {
-			break;
-		}
-	}
-
-	buf_len = talloc_get_size(cli->evt_inbuf);
-	pdu_len = smb_len(cli->evt_inbuf) + 4;
-	rest_len = buf_len - raw_pdu_len;
-
-	if (req == NULL) {
-		DEBUG(3, ("Request for mid %d not found, dumping PDU\n", mid));
-
-		memmove(cli->evt_inbuf,	cli->evt_inbuf + raw_pdu_len,
-			buf_len - raw_pdu_len);
-
-		cli->evt_inbuf = TALLOC_REALLOC_ARRAY(NULL, cli->evt_inbuf,
-						      char, rest_len);
-		return;
-	}
-
-	if (buf_len == pdu_len) {
-		/*
-		 * Optimal case: Exactly one PDU was in the socket buffer
-		 */
-		req->inbuf = talloc_move(req, &cli->evt_inbuf);
-		goto done;
-	}
-
-	DEBUG(11, ("buf_len = %d, pdu_len = %d, splitting buffer\n",
-		   (int)buf_len, (int)pdu_len));
-
-	if (pdu_len < rest_len) {
-		/*
-		 * The PDU is shorter, talloc_memdup that one.
-		 */
-		req->inbuf = (char *)talloc_memdup(
-			req, cli->evt_inbuf, pdu_len);
-
-		memmove(cli->evt_inbuf,
-			cli->evt_inbuf + raw_pdu_len,
-			buf_len - raw_pdu_len);
-
-		cli->evt_inbuf = TALLOC_REALLOC_ARRAY(
-			NULL, cli->evt_inbuf, char, rest_len);
-	}
-	else {
-		/*
-		 * The PDU is larger than the rest,
-		 * talloc_memdup the rest
-		 */
-		req->inbuf = talloc_move(req, &cli->evt_inbuf);
-
-		cli->evt_inbuf = (char *)talloc_memdup(
-			cli, req->inbuf + raw_pdu_len,
-			rest_len);
-	}
-
-	if ((req->inbuf == NULL) || (cli->evt_inbuf == NULL)) {
-		status = NT_STATUS_NO_MEMORY;
-		goto invalidate_requests;
-	}
-
- done:
-	async_req_done(req->async);
-	return;
-
- invalidate_requests:
-
-	DEBUG(10, ("handle_incoming_pdu: Aborting with %s\n",
-		   nt_errstr(status)));
-
-	for (req = cli->outstanding_requests; req; req = req->next) {
-		async_req_error(req->async, status);
-	}
-	return;
-}
-
-/*
- * fd event callback. This is the basic connection to the socket
- */
-
-static void cli_state_handler(struct event_context *event_ctx,
-			      struct fd_event *event, uint16 flags, void *p)
-{
-	struct cli_state *cli = (struct cli_state *)p;
-	struct cli_request *req;
-
-	DEBUG(11, ("cli_state_handler called with flags %d\n", flags));
-
-	if (flags & EVENT_FD_READ) {
-		int res, available;
-		size_t old_size, new_size;
-		char *tmp;
-
-		res = ioctl(cli->fd, FIONREAD, &available);
-		if (res == -1) {
-			DEBUG(10, ("ioctl(FIONREAD) failed: %s\n",
-				   strerror(errno)));
-			goto sock_error;
-		}
-
-		if (available == 0) {
-			/* EOF */
-			goto sock_error;
-		}
-
-		old_size = talloc_get_size(cli->evt_inbuf);
-		new_size = old_size + available;
-
-		if (new_size < old_size) {
-			/* wrap */
-			goto sock_error;
-		}
-
-		tmp = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf, char,
-					   new_size);
-		if (tmp == NULL) {
-			/* nomem */
-			goto sock_error;
-		}
-		cli->evt_inbuf = tmp;
-
-		res = recv(cli->fd, cli->evt_inbuf + old_size, available, 0);
-		if (res == -1) {
-			DEBUG(10, ("recv failed: %s\n", strerror(errno)));
-			goto sock_error;
-		}
-
-		DEBUG(11, ("cli_state_handler: received %d bytes, "
-			   "smb_len(evt_inbuf) = %d\n", (int)res,
-			   smb_len(cli->evt_inbuf)));
-
-		/* recv *might* have returned less than announced */
-		new_size = old_size + res;
-
-		/* shrink, so I don't expect errors here */
-		cli->evt_inbuf = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf,
-						      char, new_size);
-
-		while ((cli->evt_inbuf != NULL)
-		       && ((smb_len(cli->evt_inbuf) + 4) <= new_size)) {
-			/*
-			 * we've got a complete NBT level PDU in evt_inbuf
-			 */
-			handle_incoming_pdu(cli);
-			new_size = talloc_get_size(cli->evt_inbuf);
-		}
-	}
-
-	if (flags & EVENT_FD_WRITE) {
-		size_t to_send;
-		ssize_t sent;
-
-		for (req = cli->outstanding_requests; req; req = req->next) {
-			to_send = smb_len(req->outbuf)+4;
-			if (to_send > req->sent) {
-				break;
-			}
-		}
-
-		if (req == NULL) {
-			event_fd_set_not_writeable(event);
-			return;
-		}
-
-		sent = send(cli->fd, req->outbuf + req->sent,
-			    to_send - req->sent, 0);
-
-		if (sent < 0) {
-			goto sock_error;
-		}
-
-		req->sent += sent;
-
-		if (req->sent == to_send) {
-			return;
-		}
-	}
-	return;
-
- sock_error:
-	for (req = cli->outstanding_requests; req; req = req->next) {
-		req->async->state = ASYNC_REQ_ERROR;
-		req->async->status = map_nt_error_from_unix(errno);
-	}
-	TALLOC_FREE(cli->fd_event);
-	close(cli->fd);
-	cli->fd = -1;
-}
-
-/*
- * Holder for a talloc_destructor, we need to zero out the pointers in cli
- * when deleting
- */
-struct cli_tmp_event {
-	struct cli_state *cli;
-};
-
-static int cli_tmp_event_destructor(struct cli_tmp_event *e)
-{
-	TALLOC_FREE(e->cli->fd_event);
-	TALLOC_FREE(e->cli->event_ctx);
-	return 0;
-}
-
-/*
- * Create a temporary event context for use in the sync helper functions
- */
-
-struct cli_tmp_event *cli_tmp_event_ctx(TALLOC_CTX *mem_ctx,
-					struct cli_state *cli)
-{
-	struct cli_tmp_event *state;
-
-	if (cli->event_ctx != NULL) {
-		return NULL;
-	}
-
-	state = talloc(mem_ctx, struct cli_tmp_event);
-	if (state == NULL) {
-		return NULL;
-	}
-	state->cli = cli;
-	talloc_set_destructor(state, cli_tmp_event_destructor);
-
-	cli->event_ctx = event_context_init(state);
-	if (cli->event_ctx == NULL) {
-		TALLOC_FREE(state);
-		return NULL;
-	}
-
-	cli->fd_event = event_add_fd(cli->event_ctx, state, cli->fd,
-				     EVENT_FD_READ, cli_state_handler, cli);
-	if (cli->fd_event == NULL) {
-		TALLOC_FREE(state);
-		return NULL;
-	}
-	return state;
-}
-
-/*
- * Attach an event context permanently to a cli_struct
- */
-
-NTSTATUS cli_add_event_ctx(struct cli_state *cli,
-			   struct event_context *event_ctx)
-{
-	cli->event_ctx = event_ctx;
-	cli->fd_event = event_add_fd(event_ctx, cli, cli->fd, EVENT_FD_READ,
-				     cli_state_handler, cli);
-	if (cli->fd_event == NULL) {
-		return NT_STATUS_NO_MEMORY;
-	}
-	return NT_STATUS_OK;
-}